CN116925796A - System and method for establishing fused salt thermal cracking continuous reaction - Google Patents
System and method for establishing fused salt thermal cracking continuous reaction Download PDFInfo
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- CN116925796A CN116925796A CN202310997392.2A CN202310997392A CN116925796A CN 116925796 A CN116925796 A CN 116925796A CN 202310997392 A CN202310997392 A CN 202310997392A CN 116925796 A CN116925796 A CN 116925796A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 408
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 331
- 238000004227 thermal cracking Methods 0.000 title claims abstract description 286
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 216
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 137
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000000376 reactant Substances 0.000 claims abstract description 84
- 238000009833 condensation Methods 0.000 claims abstract description 64
- 230000005494 condensation Effects 0.000 claims abstract description 64
- 239000013589 supplement Substances 0.000 claims abstract description 60
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 58
- 238000011084 recovery Methods 0.000 claims abstract description 58
- 239000002912 waste gas Substances 0.000 claims abstract description 56
- 238000003860 storage Methods 0.000 claims abstract description 52
- 239000005457 ice water Substances 0.000 claims abstract description 50
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 46
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- 239000000725 suspension Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 16
- 239000000498 cooling water Substances 0.000 claims description 14
- 230000001502 supplementing effect Effects 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000005336 cracking Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000002808 molecular sieve Substances 0.000 claims description 6
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002918 waste heat Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000000197 pyrolysis Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 description 8
- 230000035484 reaction time Effects 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000153 supplemental effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/12—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by dry-heat treatment only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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Abstract
The invention relates to a system and a method for establishing a continuous reaction of molten salt thermal cracking, and relates to the technical field of molten salt thermal cracking reactions. Comprises a sealed molten salt reaction system, a suspension type orbit determination conveying system, a movable reaction frame group, an oil gas condensation recovery system, an RTO waste gas treatment system, an absorption type ice water supply system, a molten salt storage and supplement supply system and a nitrogen generation and supplement supply system. The track of the suspension type track-fixing conveying system is arranged in the front and rear water seal tanks of the sealed molten salt reaction system, so that the reactant and the gas carried by the thermal cracking reaction product are left in the original space, the front and rear water seal tanks are provided with the free movable gate, the reactant and the thermal cracking reaction product pass through, the air is effectively prevented from being introduced and the thermal cracking gas is effectively prevented from leaking out in a sealing manner, the space of the sealed molten salt reaction system is established, the front end is continuously moved into the reactant, the rear end is continuously moved out of the thermal cracking reaction product, the gas is effectively prevented from entering and exiting, and the continuous thermal cracking reaction operation target is realized.
Description
Technical Field
The invention relates to the technical field of molten salt thermal cracking reaction, in particular to a system and a method for establishing a continuous reaction of molten salt thermal cracking.
Background
The molten salt thermal cracking organic polymer mixed material can easily convert the polymer material into carbon and thermal cracking gas, and can lead the base materials in the original mixture to be separated easily as shown in figure 1, wherein the base materials such as metal, fiber and the like can be easily separated, the thermal cracking gas can be easily converted into thermal cracking oil through condensation, and the non-condensable gas can obtain stable carbon dioxide and water through incineration treatment, thereby being capable of being effectively treated and recycled. The method and the system for classifying and recycling the organic polymer mixture by using the fused salt thermal cracking process have batch operation problems at present, the method and the system for classifying and recycling the substrate by using the fused salt thermal cracking process have the problems that the single-way introduction and removal operation is carried out, the removal reactant and the thermal cracking reaction product cannot be introduced at the same time, quantitative production problems are caused, the thermal cracking gas cannot be changed inadvertently, the rear end condensation and waste gas treatment problems are increased, molten salt supplementation cannot be supplemented at the same time during thermal cracking, the operation conditions are influenced, the production program problem is interrupted, the production layout cannot be planned by matching with the operation program, and the commercialization promotion problems are caused, for example, the invention patent application number CN200910041003.9 is a single-batch operation system, the generated thermal cracking gas cannot be ignored, a gas expansion absorption device is required to balance the operation pressure, the thermal cracking operation cannot be continuously operated, the thermal cracking reaction product cannot be directly removed while the reactant is introduced, the thermal cracking process is difficult to quantitatively produce, the problem is caused, the problem of supplementing the molten salt is more difficult to consume, the layout of the material entering and the discharging operation is more difficult, and the problems need to be overcome, and the promotion difficulty of the patent is caused.
Therefore, the method and the system are particularly studied deeply, and how to establish a continuously-operated thermal cracking system and a continuously-operated thermal cracking method which are continuously introduced and removed by utilizing a conveying system becomes a technical problem which needs to be solved by the person skilled in the art.
Disclosure of Invention
The invention mainly aims to provide a system and a method for establishing a fused salt thermal cracking continuous reaction, which can enable reactants and thermal cracking reaction products to freely enter and exit a sealed fused salt reaction system, establish a micropressure sealed operation environment, ensure that the thermal cracking reaction operates in an anoxic safe environment, establish a continuous conveying scheme, and realize the purpose of continuous operation without interrupting the transfer of the thermal cracking reaction into the reactants and removing the thermal cracking reaction products.
In order to achieve the above purpose, the invention provides a continuous reaction system for molten salt thermal cracking, which comprises a sealed molten salt reaction system, a suspended track-fixing conveying system, a movable reaction frame group, an oil gas condensation recovery system, an RTO waste gas treatment system, an absorption type ice water supply system, a molten salt storage and supplement supply system and a nitrogen generation and supplement supply system; wherein,,
the movable reaction frame group is connected to the suspension type orbit determination conveying system and used for bearing reactants;
The suspension type rail-fixing conveying system is used for driving reactants arranged on the movable reaction frame group to walk through the sealed molten salt reaction system;
the sealed molten salt reaction system is used for heating and thermally cracking reactants to generate thermally cracked reaction products and thermally cracked gas, and the thermally cracked gas rises to enter the oil gas condensation recovery system;
the oil-gas condensation recovery system is used for rapidly cooling the thermal cracking gas to form thermal cracking oil which flows down to the lower end of the oil-gas condensation recovery system along the condenser; introducing the condensed thermal cracking non-condensable gas into an RTO waste gas treatment system for treatment through an outlet;
the RTO waste gas treatment system is characterized in that non-condensable pyrolysis gas is incinerated by the RTO waste gas treatment system and converted into harmless tail gas, and the tail gas is introduced into the absorption type ice water supply system;
the absorption type ice water supply system is used for converting the heat energy of the tail gas into condensation cooling water;
the molten salt storage and supplement supply system is used for supplementing molten salt carried along with thermal cracking reaction products, and maintaining fixed molten salt amount to enable the thermal cracking reaction to be continuously carried out;
the nitrogen generation and supplement supply system provides nitrogen required by deoxidization before the operation of the sealed molten salt reaction system.
Further, the sealed molten salt reaction system comprises a molten salt reaction tank, a front water seal tank, a rear water seal tank and a separation plate; the front water seal tank and the rear water seal tank are respectively distributed at the front end and the rear end of the molten salt reaction tank; a molten salt reaction tank heater is arranged below the molten salt reaction tank, a molten salt reaction tank hot molten salt inlet is arranged above the front end, a molten salt overflow outlet of the molten salt reaction tank is arranged above the rear end, overflow molten salt flows back into the molten salt storage and supplement supply tank, and a molten salt discharge valve is arranged at the bottom of the rear end and used for discharging molten salt in the molten salt reaction tank and flowing back into the molten salt storage and supplement supply tank; the front water seal tank and the rear water seal tank are both in concave blocking design, the water seal is enabled to reach a fixed water level through the front water seal water inlet valve and the rear water seal water inlet valve, and a partition plate is arranged between the front water seal tank and the rear water seal tank, so that the water seal forms an inner space and an outer space.
Further, the suspended type rail fixing conveying system comprises a conveying motor, a conveying chain and a suspended type conveying rail; the suspended conveying track sequentially passes through the front water seal groove, the upper part of the molten salt reaction groove and the rear water seal groove to form a closed loop, and the conveying chain is driven by the conveying motor to run along the suspended conveying track.
Furthermore, the front end of the oil gas condensation recovery system is connected with an exhaust gas outlet above the sealed molten salt reaction system, so that the thermal cracking gas is led into the oil gas condensation recovery system, the temperature of the thermal cracking gas is reduced after the thermal cracking gas enters the oil gas condensation system, most of the thermal cracking gas in the thermal cracking gas is condensed into thermal cracking oil which is led out through a thermal cracking oil outlet below, and a small part of the thermal cracking gas is thermal cracking non-condensed gas which is discharged through a condensation gas outlet and is led into a rear RTO exhaust gas treatment system to be incinerated into stable and harmless gas.
Furthermore, the RTO waste gas treatment system is a heat accumulating type waste gas treatment device, an inlet of the heat accumulating type waste gas treatment device is connected with a gas outlet of the oil gas condensation recovery system, thermal cracking non-condensed gas is introduced for incineration treatment, and an outlet at the tail end of the heat accumulating type waste gas treatment device is connected with an absorption type frozen ice water supply system for producing ice water for cooling required by the oil gas condensation recovery system.
Further, the molten salt storage and supplement supply system comprises a molten salt storage and supplement tank, a molten salt supply pump and a molten salt reflux filter; a molten salt heater is arranged below the molten salt storage supplementing tank, a molten salt outlet is arranged on the side edge of the lower part, a molten salt outlet and a molten salt reflux port are arranged above the molten salt heater, and a molten salt input port is arranged on the side edge of the upper part; the molten salt outlet is connected with the hot molten salt inlet of the molten salt reaction tank through a molten salt pump, the molten salt feeding port is used for introducing molten salt solids into the molten salt storage and supplement tank, molten salt is heated by the molten salt heater to be converted into liquid molten salt, the liquid molten salt is introduced into the molten salt reaction tank through the molten salt circulating pump, overflow molten salt flows back through the hot molten salt overflow outlet of the molten salt reaction tank, and the molten salt flows back into the molten salt storage and supplement tank after passing through the molten salt backflow filter.
Furthermore, the nitrogen generation and supplement supply system separates nitrogen from oxygen through a molecular sieve by air compressed gas to obtain high-purity nitrogen, the high-purity nitrogen is used for providing nitrogen required by deoxidization before the operation of the sealed molten salt reaction system, the nitrogen of the nitrogen generation and supplement supply system is temporarily stored through a storage tank and is introduced into the sealed molten salt reaction system through a control valve to perform deoxidization operation of the space in the sealed molten salt reaction system.
A method for establishing a continuous reaction of molten salt thermal cracking, which is realized by adopting any one of the above molten salt thermal cracking continuous reaction systems, and comprises the following steps:
(1) Utilizing a sealed molten salt reaction system as a reactant to generate a thermal cracking reaction tool;
(2) The suspended track-fixing conveying system is used as a conveying tool for conveying reactants and thermal cracking reaction products into and out of the sealed molten salt reaction system;
(3) The movable reaction frame is used as a movable bearing tool for reactants and thermal cracking reaction products;
(4) Using an oil gas condensation recovery system as a thermal cracking oil recovery tool;
(5) Using an RTO waste gas incineration treatment system as a thermal cracking non-condensable gas treatment tool;
(6) The absorption type ice water supply system is used as a waste gas treatment tail gas waste heat recovery tool;
(7) Using the molten salt storage and supplement supply system as a molten salt storage and supplement supply tool of the sealed molten salt reaction system;
(8) And a nitrogen generation and supplement system is used as a deoxidizing tool in the space of the sealed molten salt reaction system.
Further, the method comprises the following specific steps:
step S1, deoxidizing in a sealed molten salt reaction system;
the nitrogen introduced into the sealed molten salt reaction system extrudes air originally existing in the space of the sealed molten salt reaction system, and the air enters an oil gas condensation recovery system, an RTO waste gas treatment system and an absorption type ice water supply system in sequence and is discharged; starting an RTO waste gas treatment system to perform operation preparation before treatment, and performing waste gas treatment when the incineration temperature is reached;
s2, fixedly introducing the movable reaction frame group into molten salt in a molten salt reaction tank through a suspension type conveying track to perform heating and thermal cracking reaction;
preparing operation of a suspended rail-fixing conveying system, starting a suspended conveying motor to perform conveying operation test, placing reactants on a movable reaction rack set, then hanging the movable reaction rack set on the suspended rail-fixing conveying system, starting the suspended conveying motor to operate, pulling a rail-fixing rolling pulley to operate in time, continuously advancing the movable reaction rack set filled with the reactants to a front water seal tank, enabling the movable reaction rack set to move down along with a suspended conveying rail to enter a water seal when passing through the front water seal tank, enabling water in the front water seal tank to extrude air entrained by the reactants in the movable reaction rack set, enabling the movable reaction rack set to move up along with the suspended conveying rail to above the molten salt reaction tank after water seal, enabling the movable reaction rack set to be introduced into molten salt of the molten salt reaction tank to perform heating and thermal cracking reaction through the suspended conveying rail, enabling thermal cracking gas to move up into a thermal cracking condensation recovery system, enabling thermal cracking time to be the same as the distance between the movable molten salt reaction tank of the suspended rail-fixing conveying system, enabling the movable reaction rack set to move up and down along with the suspended conveying rail, enabling the water in the front water seal tank to move down along with the water seal tank to move out of the suspended conveying rail, enabling the thermally cracked reaction rack to be moved out of the movable reaction rack set to be safely removed, and enabling the thermally cracked reaction set to be moved out and removed from the thermally cracked reaction set to be generated; the reactants are continuously conveyed into the sealed molten salt reaction system, so that thermal cracking reaction products can be continuously removed, and continuous reaction operation is realized;
Step S3, introducing thermal cracking gas generated by thermal cracking reaction into an oil-gas condensation recovery system, introducing circulating condensation cooling water, enabling the thermal cracking gas to be rapidly cooled to form thermal cracking oil, enabling the thermal cracking oil to flow down to the lower end of the oil-gas condensation recovery system along a condenser, and leading out the thermal cracking oil through a control valve; the condensed thermal cracking non-condensable gas is introduced into an RTO waste gas treatment system for treatment through an outlet, the non-condensable thermal cracking gas is incinerated by the RTO waste gas treatment system and converted into harmless tail gas, the tail gas is introduced into a rear absorption type ice water supply system, the heat energy of the tail gas is converted into condensation cooling water, the condensation cooling water is used as cooling ice water for oil gas condensation recovery, and then the tail gas is discharged through a chimney.
Further, before step S1, the method further includes: step S0, before starting the fused salt thermal cracking continuous reaction system, preparing operation before operation is finished:
(1) Starting an absorption type ice water supply system to perform circulation operation of condensing and cooling ice water;
(2) Starting an RTO waste gas treatment system;
(3) Starting a molten salt storage and supplement supply system, introducing molten salt prepared in advance into a molten salt storage and supplement supply tank through a molten salt input port, starting a molten salt heater, melting the molten salt into liquid molten salt and reaching the thermal cracking demand temperature, starting a reaction tank heater of a molten salt reaction tank to preheat the molten salt reaction tank so as to prevent the molten salt from cooling and caking, and starting a molten salt circulating pump to circulate the molten salt after the reaction tank heater is preheated; supplementing water to the front water seal tank and the rear water seal tank, and introducing clear water to enable the isolation plate and the suspension conveying track to go deep under water seal, so that the sealed molten salt reaction system is completely isolated from an external space; and (3) introducing compressed air into a nitrogen generation and supplement supply system, leading out oxygen by the molecular sieve to leave nitrogen, and introducing the nitrogen above the molten salt reaction tank.
The invention has the beneficial effects that:
the invention utilizes a suspended track-fixing conveying system, a movable reaction frame and a combined sealed molten salt reaction system, wherein the track of the suspended track-fixing conveying system is arranged in a front water seal groove and a rear water seal groove of the sealed molten salt reaction system, so that the reactant and gas carried by thermal cracking reaction products are left in the original space, the front water seal groove and the rear water seal groove form a free movable gate, the reactant and the thermal cracking reaction products can pass through, the entrained gas can not pass through the sealing-maintaining device to effectively prevent air from being introduced and the thermal cracking gas from leaking out, a sealed molten salt reaction system space is established, the front end is continuously moved into the reactant, the rear end is continuously moved out of the thermal cracking reaction products, the gas is effectively prevented from entering and exiting, and the continuous thermal cracking reaction operation target is realized.
Drawings
FIG. 1 is a flow chart of a prior art molten salt thermal cracking process;
FIG. 2 is a schematic diagram of a prior art processing system architecture;
FIG. 3 is a schematic diagram of the overall structure of the present invention;
fig. 4 is a flow chart of the method of the present invention.
Wherein, in the figure:
1. a sealed molten salt reaction system; 2. a suspended track-fixing conveying system; 3. a movable reaction rack set; 4. an oil gas condensation recovery system; 5. an RTO exhaust treatment system; 6. an absorption ice water supply system; 7. a molten salt storage replenishment supply system; 8. a nitrogen generation supplemental supply system; 10. a molten salt reaction tank; 11. a front water seal groove; 12. a rear water seal tank; 13. a partition plate; 14. a molten salt inlet of the molten salt reaction tank; 15. a hot molten salt overflow outlet of the molten salt reaction tank; 16. a molten salt reaction tank discharge outlet; 17. fused salt; 18. thermally cracking the carbon residue and impurities; 19. thermally cracking the gas; 191. thermally cracking the oil; 192. the thermal cracking gas is not condensed; 21. a suspended conveyor rail; 71. a molten salt storage replenishment supply tank; 72. a molten salt input port; 73. a molten salt reflux filter; A. reactants; B. thermally cracking the reaction product; air, compressed Air; n (N) 2 Nitrogen gas; o (O) 2 Oxygen; h0, molten salt heater; h1, a reaction tank heater; m, suspending a conveying motor; p, a molten salt circulating pump; w (W) 0 Clean water; WL, condensing cooling water; v1, a front water seal inlet valve; v2, a rear water seal inlet valve; v3, a molten salt discharge valve.
Detailed Description
In order to achieve the above objects and effects, the present invention adopts the technical means and structure, and the features and functions of the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Aiming at the molten salt thermal cracking reaction system and the method, the invention is further discussed, a continuously-operated thermal cracking system and a continuously-operated thermal cracking method which are continuously introduced and removed by utilizing a conveying system are established, particularly, when reactants are conveyed in a moving way, the tightness of a molten salt reaction furnace cannot be damaged, molten salt carried by thermal cracking reaction products can be replenished at any time, further, the operation benefit of the molten salt thermal cracking system is greatly improved aiming at effective recycling of thermal cracking gas and measures of energy conservation and emission reduction, and the continuous reaction method and the continuous reaction system for molten salt thermal cracking are developed for industrial utilization through years of test research.
As shown in fig. 3, the invention provides a continuous reaction system for establishing molten salt thermal cracking, which comprises a sealed molten salt reaction system 1, a suspended track-fixing conveying system 2, a movable reaction frame group 3, an oil gas condensation recovery system 4, an RTO waste gas treatment system 5, an absorption type ice water supply system 6, a molten salt storage and supplement supply system 7 and a nitrogen generation and supplement supply system 8; wherein,,
The movable reaction frame group 3 is connected to the suspended type rail-fixing conveying system 2 and is used for bearing the reactant A;
the suspension type rail-fixing conveying system 2 is used for driving reactants arranged on the movable reaction frame group 3 to walk through the sealed molten salt reaction system 1;
the sealed molten salt reaction system 1 is used for heating and thermally cracking the reactant A to generate a thermally cracked reaction product B and thermally cracked gas, and the thermally cracked gas 19 rises to enter the oil gas condensation recovery system 4;
the oil-gas condensation recovery system 4 is configured to rapidly cool the thermal cracking gas 19 to form thermal cracking oil 191, and flow down the condenser to the lower end of the oil-gas condensation recovery system 4; the condensed thermal cracking non-condensable gas is introduced into an RTO waste gas treatment system 5 for treatment through an outlet;
the RTO waste gas treatment system 5 is characterized in that the non-condensable thermal-cracking gas 192 is incinerated by the RTO waste gas treatment system 5 and converted into harmless tail gas, and the tail gas is introduced into the absorption type ice water supply system 6;
the absorption type ice water supply system 6 is used for converting the heat energy of the tail gas into condensed cooling water;
the molten salt storage and supplement supply system 7 is used for supplementing molten salt carried along with thermal cracking reaction products, and maintaining fixed molten salt amount to enable the thermal cracking reaction to continuously proceed;
The nitrogen gas generation supplemental supply system 8 provides the nitrogen gas required for deoxidization prior to operation of the sealed molten salt reaction system 1.
In this embodiment, the sealed molten salt reaction system 1 includes a molten salt reaction tank 10, a front water seal tank 11, a rear water seal tank 12, and a partition plate 13; the front water seal tank 11 and the rear water seal tank 12 are respectively distributed at the front end and the rear end of the molten salt reaction tank 10; the molten salt reaction tank 10 is a strip-type reaction tank, a heater of the molten salt reaction tank 10 is arranged below the molten salt reaction tank 10, heat energy required by thermal cracking reaction is provided, the temperature of molten salt required by the molten salt reaction tank 10 is maintained, a hot molten salt inlet 14 of the molten salt reaction tank is arranged above the front end, a molten salt supplementing and storing circulating system is provided for introducing liquid molten salt, and the required molten salt amount for thermal cracking is provided; the overflow outlet 15 of the molten salt is arranged above the rear end, so that excessive overflow molten salt 17 introduced into the molten salt reaction tank 10 can be refluxed into the molten salt storage and supplement supply tank 71, and excessive molten salt can be introduced back through a natural reflux mode, so that the molten salt 17 can be recycled for thermal cracking tasks; a molten salt reaction tank discharge outlet 16 is arranged below the rear end of the molten salt reaction tank 10, and a molten salt discharge valve V3 is arranged for discharging molten salt in the molten salt reaction tank 10 and flowing back to the molten salt storage and supplement supply tank 71; the front water seal tank 11 and the rear water seal tank 12 are both in concave blocking design, the water seal is enabled to reach a fixed water level through the front water seal water inlet valve V1 and the rear water seal water inlet valve V2, and a separation plate 13 is arranged between the front water seal tank 11 and the rear water seal tank 12, so that the water seal forms an inner space and an outer space. The rear water seal tank 12 has the function of stopping the thermal cracking reaction, and when the thermal cracking reactant is removed, the rear water seal tank 12 can cool down the thermal cracking reactant to stop the thermal cracking reaction, so that the removed thermal cracking reaction product can safely stop the reaction, and the damage of thermal cracking gas generated by continuous reaction is avoided. The device has the function of stopping the thermal cracking reaction, and when the thermal cracking reactant is removed, the rear water seal tank 12 can cool down the thermal cracking reactant to stop the thermal cracking reaction, so that the removed thermal cracking reaction product can safely stop the reaction, and the damage of thermal cracking gas is avoided. The suspended conveying rail 21 of the suspended track-fixing conveying system 2 is lowered into the front water seal tank 11, then lifted and fixed above the molten salt reaction tank 10, the movable reaction frame group 3 is immersed into the molten salt reaction tank 10, reactants are heated in molten salt to carry out thermal cracking reaction, the rail is lifted again and turns to descend into the rear water seal tank 12 after thermal cracking reaction, the suspended conveying rail 21 is completely immersed into the water seal tank, and the suspended conveying rail 21 is lifted again to recycle to the feeding position after being isolated by water seal; by the arrangement of the suspended conveying rails 21, the suspended type rail-fixing conveying system 2 can completely block air introduction and discharge of thermal cracking gas 19 through water seals when conveying reactants and thermal cracking reaction products, so as to form a completely sealed fused salt thermal cracking reaction system.
The movable reaction rack set 3 provides a thermal cracking space for the reactant, so that the reactant can be kept in molten salt to be directly hung on the suspended rail conveying system 2 for conveying during thermal cracking, and the thermal cracking reaction product can be easily removed and recovered; the movable reaction frame group 3 consists of stainless steel metal frames, the periphery is surrounded by stainless steel nets, reactants and thermal cracking reaction products are limited to move out of the movable reaction frame group 3, the stainless steel nets can enable liquid molten salt to freely enter and exit, the reactants are heated so as to generate thermal cracking action, the reactants can be vertically introduced into the movable reaction frame group 3, the reaction frames can be manufactured according to the requirements of the reactants, the reaction frames can be limited and arranged according to the sizes and thickness of the reactants so as to avoid large-scale movement during thermal cracking, the periphery stainless steel nets provide liquid molten salt entering and exiting channels so as to enable the reactants to be uniformly heated for thermal cracking reaction, the movable reaction frame group 3 can be conveyed along with the suspended fixed track conveying system 2 to be fixed at a fixed walking position for thermal cracking reaction, the movable reaction frame group 3 provides small batches of reactants for different time shifts, and simultaneously can also take out small batches of thermal cracking reaction products at different time so as to achieve the aim of continuous operation.
In this embodiment, the suspended track-fixing conveying system 2 includes a conveying motor, a conveying chain, and a suspended conveying track 21; the suspended conveying track 21 sequentially passes through the front water seal tank 11, the upper part of the molten salt reaction tank 10 and the rear water seal tank 12 to form a closed loop, and the conveying chain is driven by a conveying motor to run along the suspended conveying track 21. The suspended rail fixing and conveying system 2 can be arranged according to the operation requirement position of the processing space, customized arrangement can be carried out according to the operation space through the fixing of the suspended conveying rail 21, the serial operation arrangement comprises a reactant placing movable reaction frame operation space, a movable reaction frame conveying hanging operation space, a conveying running operation space, a front water seal blocking space, a reactant thermal cracking space, a rear water seal blocking space, a movable reaction frame removing operation space after thermal cracking, a thermal cracking reaction product taking operation space and the like, the operation and control can be easily carried out according to the operation flow of a single conveying system, the continuous reaction program of molten salt thermal cracking is effectively integrated, rail fixing operation and space arrangement requirement targets are realized, and the upper, lower, left and right spaces of rail conveying can be completely fixed, and various task requirements can be determined and executed. The moving speed of the suspended rail-fixed suspended conveying system is used as the time control basis of the thermal cracking reaction, the thermal cracking reaction time can be controlled by the rail-fixed suspended conveying system, the conveying speed can be reduced to meet the thermal cracking reaction extension time when the thermal cracking time is required to be long, the circulating moving speed is connected with the thermal cracking reaction time, and the control operation purpose can be easily realized.
In this embodiment, the front end of the oil-gas condensation recovery system 4 is connected to the exhaust gas outlet above the sealed molten salt reaction system 1, so that the thermal cracking gas 19 is introduced into the oil-gas condensation recovery system 4, the oil-gas condensation recovery system 4 uses ice water for cooling, the ice water source can be ice water for recovering and converting the heat energy of the tail gas at the rear stage, so as to provide operation efficiency, the thermal cracking gas 19 enters the oil-gas condensation system and then reduces the temperature, most of the thermal cracking gas in the thermal cracking gas 19 is condensed into thermal cracking oil 191 and is led out through the outlet of the thermal cracking oil 191 at the lower part, and a small part of the thermal cracking gas is not condensed and is discharged through the outlet of the condensed gas, and is led into the rear-stage RTO exhaust gas treatment system 5 for incineration to form stable harmless gas, and the condensed thermal cracking oil 191 can be led out through the outlet of the thermal cracking oil 191 at the lower part for further recycling.
In this embodiment, the RTO exhaust gas treatment system 5 is a regenerative exhaust gas treatment device, and can treat exhaust gas by using exhaust gas combustion heat energy, and thermally crack non-condensable gas into high-concentration organic gas, so that no additional energy source supplement is required during the treatment of the high-concentration organic gas, and the exhaust gas treatment operation cost can be reduced; the inlet of the heat accumulating type waste gas treatment device is connected with the gas outlet of the oil gas condensation recovery system 4, the pyrolysis non-condensable gas is introduced for incineration treatment, the outlet of the tail end of the heat accumulating type waste gas treatment device is connected with the absorption type frozen ice water supply system, and the ice water for cooling required by the oil gas condensation recovery system 4 is produced.
In this embodiment, the absorption ice water supply system 6 utilizes heat energy to generate ice water, the tail gas discharged from the RTO exhaust gas treatment system 5 contains a large amount of heat energy, and the absorption ice water supply system 6 can be connected to absorb the heat energy of the tail gas and convert the heat energy into cooling ice water required by the oil-gas condensation recovery system 4 to improve the heat energy recovery benefit, reduce the gas discharge temperature, further improve the operation benefit of the equipment, and the tail gas can be directly discharged through a chimney after being recovered by the heat energy.
In this embodiment, the molten salt storage and replenishment supply system 7 includes a molten salt storage and replenishment tank, a molten salt supply pump, and a molten salt reflux filter 73; a molten salt heater is arranged below the molten salt storage supplementing tank, a molten salt outlet is arranged on the side edge of the lower part, a molten salt outlet and a molten salt reflux port are arranged above the molten salt heater, and a molten salt input port 72 is arranged on the side edge of the upper part; the molten salt outlet is connected with the hot molten salt inlet 14 of the molten salt reaction tank through a molten salt pump, the molten salt input port 72 is used for introducing molten salt solids into a molten salt storage and supplement tank, molten salt is heated by a molten salt heater to be converted into liquid molten salt, the liquid molten salt is introduced into the molten salt reaction tank 10 through a molten salt circulating pump, overflow molten salt flows back through the hot molten salt overflow outlet 15 of the molten salt reaction tank, and the overflow molten salt enters the molten salt storage and supplement tank after flowing back through the molten salt backflow filter 73. The bottom of the rear end of the closed molten salt reaction tank 10 is provided with a molten salt reaction tank discharge outlet 16 which can be opened through a molten salt discharge valve V3, and molten salt in the molten salt reaction tank 10 is led back into a molten salt storage and supplement tank for storage through a molten salt reflux filter 73; the molten salt reflux filter 73 is mainly used for filtering out thermal cracking carbon slag and impurities 18 in the thermal cracking reaction, avoiding pollution of molten salt to affect the thermal cracking reaction, and the molten salt circulating pump mainly provides a thermal molten salt circulating operation function, supplements molten salt carried along with the thermal cracking reaction product, and maintains a fixed molten salt amount to enable the thermal cracking reaction to continuously proceed.
In this embodiment, the nitrogen generating and supplying system separates nitrogen and oxygen by air compressed gas through molecular sieve to obtain high-purity nitrogen, and is used for providing nitrogen needed by deoxidizing before the sealed molten salt reaction system 1 operates, the more the input nitrogen quantity is, the better the oxygen reducing effect is, and the effective molten salt thermal cracking deoxidization operation is provided, the nitrogen of the nitrogen generating and supplying system is temporarily stored in the storage tank, and is introduced into the sealed molten salt reaction system through the control valve, so as to perform the deoxidization operation of the space in the sealed molten salt reaction system, and the deoxidization purpose is realized by leading out the system through the waste gas outlet of the sealed molten salt reaction system.
The invention uses a sealed molten salt reaction system 1 as a reactant to produce a thermal cracking reaction tool: the sealed molten salt reaction system 1 provides a space for temporarily storing the molten salt and the reactant to generate thermal cracking reaction, the thermal cracking reaction time and thermal cracking gas 19 generated by the thermal cracking reaction, the molten salt temperature is higher than the melting point to form liquid, the heat energy required by the thermal cracking reaction is provided, the liquid molten salt can be quickly and fully contacted with the reactant and uniformly heated, and the reactant can be more permeated during the thermal cracking reaction, so that the thermal cracking reaction is accelerated. The front water seal tank 11 and the rear water seal tank 12 are used as front and rear free movable sealing gates of the sealed molten salt reaction system 1, the air carried by reactants on the movable reaction frame group 3 introduced by the conveying system is extruded out without being carried into the sealed molten salt reaction system 1 by utilizing the water penetrability and water pressure of the front water seal tank 11, and the water pressure is extruded out of thermal cracking gas 19 carried by thermal cracking reaction products of the sealed molten salt reaction system 1 by the rear water seal tank 12 and is left in the inner space of the sealed molten salt reaction system 1; the front and rear water seal grooves 12 form an effective free movable sealing gate, which is not limited by the shape space change of reactants and thermal cracking reaction products, and can easily seal gas to move in and out to obtain an effective micropressure blocking function, thereby optionally keeping the tightness of a molten salt reaction system and ensuring the safety of the thermal cracking reaction of molten salt. Meanwhile, the rear water seal tank 12 has the function of stopping the thermal cracking reaction, and when the thermal cracking reactant is removed, the rear water seal tank 12 can cool down the thermal cracking reactant to stop the thermal cracking reaction, so that the removed thermal cracking reaction product can safely stop the reaction, and the damage of thermal cracking gas generated by continuous reaction is avoided.
The suspended rail-fixing conveying system 2 is used as a conveying tool for conveying reactants and thermal cracking reaction products into and out of the sealed molten salt reaction system 1: the suspended rail-fixing conveying system 2 can be arranged in a rail way according to the production layout, so that a definite way and a definite space are formed at the upper part, the lower part, the left part and the right part of a conveying route, when the suspended conveying rail 21 is arranged in a water seal groove and passes through the front water seal groove 11 and the rear water seal groove 12, air carried by conveying reactants and thermal cracking gas 19 carried by thermal cracking reaction products can be carried out, the sealed molten salt reaction system 1 and an external space are kept in micro-pressure sealing by water extrusion, the front water seal groove 11 and the rear water seal groove 12 form a movable liquid gate, a micro-pressure sealed thermal cracking reaction space is effectively established, and the conveying reactants and the thermal cracking reaction products can smoothly run, so that the continuous conveying purpose is realized; the water seal tank 12 has the function of stopping the thermal cracking reaction, and when the thermal cracking reaction product is removed, the rear water seal tank 12 can cool the thermal cracking reaction product and stop the thermal cracking reaction, so that the removed thermal cracking reaction product can completely stop the reaction, and the damage of thermal cracking gas is avoided; the suspended type rail-fixing conveying system 2 is arranged above the molten salt reaction tank 10, reactants can be immersed into molten salt along with the movable reaction frame group 3 to be heated, thermal cracking reaction is further generated, the reaction can be carried out on the reactants in the movable reaction frame group 3, after the thermal cracking reaction, thermal cracking reaction products are still in the movable reaction frame group 3, the reaction products are conveyed and displaced along with the suspended type rail-fixing conveying system 2, the time of the reactants staying in the molten salt reaction tank 10 is thermal cracking reaction time, the thermal cracking reaction time can be controlled through the suspended type rail-fixing conveying system 2, when the time needs to be prolonged, the conveying speed is reduced to meet the thermal cracking reaction prolonged time, the circulating conveying speed is connected with the thermal cracking reaction time, and the aim of controlling operation can be easily realized.
The movable reaction frame group 3 is used as a movable bearing tool for reactants and thermal cracking reaction products: the specific gravity of the reactant and the thermal cracking reaction product is smaller than that of the molten salt, the reactant and the thermal cracking reaction product can float on the surface of the molten salt, in order to solve the problem that the reactant and the thermal cracking reaction product float upwards in the molten salt reaction and cannot be heated in the molten salt as a whole, the movable reaction frame group 3 is needed, the reactant is led into the molten salt along with the movable reaction frame group 3 to be heated so as to generate thermal cracking reaction, the movable reaction frame group 3 is arranged to be hung on a conveying system easily, the reactant and the thermal cracking reaction product can be effectively borne, the reactant can be moved into the molten salt to be subjected to thermal cracking reaction, and the thermal cracking reaction product can be directly removed after the thermal cracking reaction for recycling.
The oil gas condensation recovery system 4 is used as a thermal cracking oil recovery tool: the thermal cracking reaction of the polymer material can generate a large amount of thermal cracking gas 19, the thermal cracking gas 19 can be cooled by a thermal cracking gas condensing system, most of the thermal cracking gas is condensed to form thermal cracking oil 191, the thermal cracking oil 191 is further recycled, and the small part of the thermal cracking gas is non-condensed gas, and the oil gas condensing and recycling system 4 can utilize a common commercial ice water machine, and can further utilize the absorption ice water supply system 6 to convert waste heat of exhaust gas treatment tail gas into cooling ice water for condensation so as to reduce energy consumption and improve operation benefit.
Using the RTO waste gas incineration treatment system as a thermal cracking non-condensable gas treatment tool: the RTO waste gas incineration treatment system is a heat accumulating waste gas treatment system, waste gas heat energy can be effectively utilized to incinerate waste gas, energy is not needed to be supplemented in high-concentration organic waste gas treatment, compared with thermal cracking gas 19 generated by fused salt thermal cracking reaction, high-concentration thermal cracking non-condensable organic gas still exists after condensation of the thermal cracking gas, the thermal cracking non-condensable organic gas can be directly introduced into the RTO waste gas incineration treatment system, extra energy is not needed to be added in operation of the RTO waste gas incineration treatment system, treatment energy loss can be reduced, and operation benefit is improved.
The absorption ice water supply system 6 is used as a waste gas treatment tail gas waste heat recovery tool: the absorption type ice water supply system 6 is operated by utilizing heat energy, can cool ice water manufacture by utilizing waste heat of exhaust gas treatment tail gas, reduces exhaust gas emission temperature on the one hand, can generate ice water for cooling on the other hand, achieves the purpose of energy recovery, and can improve operation benefit.
The molten salt storage and supplement supply system 7 is used as a molten salt storage and supplement supply tool of the sealed molten salt reaction system 1: in the sealed molten salt reaction system 1, the molten salt is supplemented by the outside, and the original closed space cannot be destroyed, so that the molten salt storage and supplement supply system 7 is designed, liquid molten salt is formed after the molten salt is heated in advance, the molten salt is supplemented to the molten salt reaction tank 10 through the molten salt circulating pump, and then overflowed to the molten salt storage and supplement supply system 7, the molten salt reaction tank 10 is provided for fixing the molten salt amount, so that the lost molten salt of the molten salt thermal cracking reaction is effectively supplemented, and the molten salt reaction tank 10 can have enough storage space when the molten salt is discharged and flows back, thereby realizing the operation functions of moving the molten salt in and moving out.
The nitrogen gas generation and supplement supply system is used as a deoxidizing tool in the space of the sealed molten salt reaction system 1: the nitrogen generation and supplement supply system can provide high-purity nitrogen, can be introduced into the sealed molten salt reaction system through the gas control function, can extrude air in the space in the sealed molten salt reaction system before the molten salt thermal cracking reaction, reduces the oxygen content, prevents the combustion phenomenon, and realizes the thermal cracking requirement.
According to the invention, through establishing energy-saving measures of the fused salt thermal cracking reaction system, the waste gas incineration treatment can utilize the heat energy of the non-condensing thermal cracking gas 19, and the heat energy of the waste gas discharged tail gas can be converted into ice water through the absorption type refrigerating system, so that the waste gas can be used as cooling water of the oil-gas separation condensing system, the energy is fully utilized, and the operation benefit is further provided.
As shown in fig. 4, the invention also provides a method for establishing a molten salt thermal cracking continuous reaction, which comprises the following steps:
(1) Utilizing a sealed molten salt reaction system as a reactant to generate a thermal cracking reaction tool;
(2) The suspended track-fixing conveying system is used as a conveying tool for conveying reactants and thermal cracking reaction products into and out of the sealed molten salt reaction system;
(3) The movable reaction frame is used as a movable bearing tool for reactants and thermal cracking reaction products;
(4) Using an oil gas condensation recovery system as a thermal cracking oil recovery tool;
(5) Using an RTO waste gas incineration treatment system as a thermal cracking non-condensable gas treatment tool;
(6) The absorption type ice water supply system is used as a waste gas treatment tail gas waste heat recovery tool;
(7) Using the molten salt storage and supplement supply system as a molten salt storage and supplement supply tool of the sealed molten salt reaction system;
(8) And a nitrogen generation and supplement system is used as a deoxidizing tool in the space of the sealed molten salt reaction system.
The method for establishing the fused salt thermal cracking continuous reaction comprises the following specific steps:
step S0, before starting the fused salt thermal cracking continuous reaction system, preparing operation before operation is finished:
(1) Starting an absorption type ice water supply system to perform circulation operation of condensing and cooling ice water;
(2) Starting an RTO waste gas treatment system;
(3) Starting a molten salt storage and supplement supply system 7, introducing molten salt prepared in advance into a molten salt storage and supplement supply tank 71 through a molten salt input port 72, starting a molten salt heater H0, melting the molten salt into liquid molten salt and reaching the thermal cracking demand temperature, further starting a reaction tank heater H1 of a molten salt reaction tank 10 to preheat the molten salt reaction tank 10, preventing the molten salt 17 from being cooled and agglomerating, and starting a molten salt circulating pump P to circulate the molten salt 17 after the reaction tank heater H1 is preheated; the front water seal tank 11 and the rear water seal tank 12 are subjected to water supplementing, clear water WO is introduced to enable the isolation plate 13 and the suspension type conveying track 21 to go deep into water sealing, so that the sealed molten salt reaction system 1 is completely isolated from an external space; introducing compressed Air into a nitrogen generation and supplement supply system 8, and introducing oxygen O by molecular sieves 2 Is led out to leave nitrogen N 2 Then nitrogen N is added 2 Introduced above the molten salt reaction tank 10.
Step S1, deoxidizing in a sealed molten salt reaction system;
nitrogen N introduced into sealed molten salt reaction system 2 Air in the space of the sealed molten salt reaction system 1 originally existing is extruded out and enters an oil gas condensation recovery system4 is further discharged after passing through an RTO waste gas treatment system 5 and an absorption type ice water supply system 6; starting an RTO waste gas treatment system 5 to perform operation preparation before treatment, and performing waste gas treatment when the incineration temperature is reached;
s2, fixedly introducing the movable reaction frame group into molten salt in a molten salt reaction tank through a suspension type conveying track to perform heating and thermal cracking reaction;
preparing the operation of the suspended rail-fixing conveying system 2, starting a suspended conveying motor M to carry out conveying operation test, placing a reactant A in the movable reaction frame group 3, further suspending the suspended rail-fixing conveying system 2, starting the suspended conveying motor M to operate, namely, pulling a rail-fixing rolling pulley to operate in time, continuously advancing the movable reaction frame group 3 filled with the reactant A forward to a water seal tank 11, enabling the movable reaction frame group 3 to descend along with a suspended conveying rail 21 to enter a water seal when passing through the front water seal tank 11, enabling the water of the front water seal tank 11 to extrude the reactant A in the movable reaction frame group 3 with air, enabling the air introduction risk to be removed when introducing the reactant A, enabling the water seal to ascend above the molten salt reaction tank 10 along with the suspended conveying rail 21, the movable reaction rack set 3 is further fixedly led into the molten salt 17 of the molten salt reaction tank 10 through the suspension type conveying track 21 to carry out heating and thermal cracking reaction, the thermal cracking gas 19 can rise into the oil gas condensation recovery system 4, the thermal cracking time is the same as the distance time of the movable molten salt reaction tank 10 of the suspension type track fixing conveying system 2, after the reaction, the thermal cracking gas is lifted along with the suspension type conveying track 21 and then descends, the thermal cracking gas is led into the rear water seal tank 12, and the water in the rear water seal tank 12 can extrude the thermal cracking gas 19 aiming at the thermal cracking reaction product B which is removed, and meanwhile, the thermal cracking reaction product B which is removed from the movable reaction rack set 3 is cooled, so that the thermal cracking reaction product B can be safely removed and sent to a workplace for removing the movable reaction rack set 3, and the thermal cracking reaction procedure is completed; the reactant A can be continuously conveyed to enter the sealed molten salt reaction system 1, and meanwhile, the thermal cracking reaction product B can be continuously removed, so that the purpose of continuous reaction operation is achieved;
Step S3, the thermal cracking gas 19 generated by thermal cracking is led into the oil gas condensation recovery system 4, and the circulating condensation cooling water WL is led in, so that the thermal cracking gas 19 can be rapidly cooled to form thermal cracking oil 191 which flows down to the lower end of the oil gas condensation recovery system 4 along a condenser and is led out of the system through a control valve; the condensed thermal cracking non-condensable gas 192 is introduced into the RTO waste gas treatment system 5 for treatment through an outlet, the non-condensable thermal cracking gas 192 is incinerated by the RTO waste gas treatment system 5 and converted into harmless tail gas, the tail gas is then introduced into the rear absorption type ice water supply system 6, the heat energy of the tail gas can be converted into condensed cooling water WL, the condensed cooling water is used as cooling ice water for oil gas condensation recovery, the exhaust emission temperature can be reduced, the heat energy recovery benefit can be increased, and then the tail gas can be discharged through a chimney.
The invention utilizes a suspended track-fixing conveying system, a movable reaction frame and a combined sealed molten salt reaction system, wherein the track of the suspended track-fixing conveying system is arranged in a front water seal groove and a rear water seal groove of the sealed molten salt reaction system, so that the reactant and gas carried by thermal cracking reaction products are left in the original space, the front water seal groove and the rear water seal groove form a free movable gate, the reactant and the thermal cracking reaction products can pass through, the entrained gas can not pass through the sealing-maintaining device to effectively prevent air from being introduced and the thermal cracking gas from leaking out, a sealed molten salt reaction system space is established, the front end is continuously moved into the reactant, the rear end is continuously moved out of the thermal cracking reaction products, the gas is effectively prevented from entering and exiting, and the continuous thermal cracking reaction operation target is realized.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.
Claims (10)
1. The continuous reaction system for establishing molten salt thermal cracking is characterized by comprising a sealed molten salt reaction system, a suspension type orbit determination conveying system, a movable reaction frame group, an oil gas condensation recovery system, an RTO waste gas treatment system, an absorption type ice water supply system, a molten salt storage and supplement supply system and a nitrogen generation and supplement supply system; wherein,,
the movable reaction frame group is connected to the suspension type orbit determination conveying system and used for bearing reactants;
the suspension type rail-fixing conveying system is used for driving reactants arranged on the movable reaction frame group to walk through the sealed molten salt reaction system;
the sealed molten salt reaction system is used for heating and thermally cracking reactants to generate thermally cracked reaction products and thermally cracked gas, and the thermally cracked gas rises to enter the oil gas condensation recovery system;
the oil-gas condensation recovery system is used for rapidly cooling the thermal cracking gas to form thermal cracking oil which flows down to the lower end of the oil-gas condensation recovery system along the condenser; introducing the condensed thermal cracking non-condensable gas into an RTO waste gas treatment system for treatment through an outlet;
The RTO waste gas treatment system is characterized in that non-condensable pyrolysis gas is incinerated by the RTO waste gas treatment system and converted into harmless tail gas, and the tail gas is introduced into the absorption type ice water supply system;
the absorption type ice water supply system is used for converting the heat energy of the tail gas into condensation cooling water;
the molten salt storage and supplement supply system is used for supplementing molten salt carried along with thermal cracking reaction products, and maintaining fixed molten salt amount to enable the thermal cracking reaction to be continuously carried out;
the nitrogen generation and supplement supply system provides nitrogen required by deoxidization before the operation of the sealed molten salt reaction system.
2. The method for establishing a molten salt thermal cracking continuous reaction system according to claim 1, wherein the sealed molten salt reaction system comprises a molten salt reaction tank, a front water seal tank, a rear water seal tank and a partition plate; the front water seal tank and the rear water seal tank are respectively distributed at the front end and the rear end of the molten salt reaction tank; a molten salt reaction tank heater is arranged below the molten salt reaction tank, a molten salt reaction tank hot molten salt inlet is arranged above the front end, a molten salt overflow outlet of the molten salt reaction tank is arranged above the rear end, overflow molten salt flows back into the molten salt storage and supplement supply tank, and a molten salt discharge valve is arranged at the bottom of the rear end and used for discharging molten salt in the molten salt reaction tank and flowing back into the molten salt storage and supplement supply tank; the front water seal tank and the rear water seal tank are both in concave blocking design, the water seal is enabled to reach a fixed water level through the front water seal water inlet valve and the rear water seal water inlet valve, and a partition plate is arranged between the front water seal tank and the rear water seal tank, so that the water seal forms an inner space and an outer space.
3. The continuous reaction system for establishing molten salt thermal cracking of claim 2, wherein the suspended orbital transfer system comprises a transfer motor, a transfer chain and a suspended transfer track; the suspended conveying track sequentially passes through the front water seal groove, the upper part of the molten salt reaction groove and the rear water seal groove to form a closed loop, and the conveying chain is driven by the conveying motor to run along the suspended conveying track.
4. The continuous molten salt thermal cracking reaction system of claim 1, wherein the front end of the oil-gas condensation recovery system is connected with an exhaust gas outlet above the sealed molten salt reaction system, so that the thermal cracking gas is led into the oil-gas condensation recovery system, the temperature of the thermal cracking gas is reduced after the thermal cracking gas enters the oil-gas condensation system, most of the thermal cracking gas in the thermal cracking gas is condensed into thermal cracking oil which is led out through a thermal cracking oil outlet below, and a small part of the thermal cracking gas is not condensed, is discharged through a condensed gas outlet, and is led into a rear RTO exhaust gas treatment system to be incinerated into stable harmless gas.
5. The continuous reaction system for establishing molten salt thermal cracking of claim 1, wherein the RTO exhaust gas treatment system is a heat accumulating exhaust gas treatment device, the inlet of the heat accumulating exhaust gas treatment device is connected with the gas outlet of the oil gas condensation recovery system, the thermally cracked non-condensable gas is introduced for incineration treatment, the tail end outlet is connected with the absorption type frozen ice water supply system, and the cooling ice water required by the oil gas condensation recovery system is produced.
6. The method for establishing a molten salt thermal cracking continuous reaction system according to claim 2, wherein the molten salt storage and supplement supply system comprises a molten salt storage and supplement tank, a molten salt supply pump and a molten salt reflux filter; a molten salt heater is arranged below the molten salt storage supplementing tank, a molten salt outlet is arranged on the side edge of the lower part, a molten salt outlet and a molten salt reflux port are arranged above the molten salt heater, and a molten salt input port is arranged on the side edge of the upper part; the molten salt outlet is connected with the hot molten salt inlet of the molten salt reaction tank through a molten salt pump, the molten salt feeding port is used for introducing molten salt solids into the molten salt storage and supplement tank, molten salt is heated by the molten salt heater to be converted into liquid molten salt, the liquid molten salt is introduced into the molten salt reaction tank through the molten salt circulating pump, overflow molten salt flows back through the hot molten salt overflow outlet of the molten salt reaction tank, and the molten salt flows back into the molten salt storage and supplement tank after passing through the molten salt backflow filter.
7. The continuous reaction system for establishing molten salt thermal cracking of claim 1, wherein the nitrogen generation and supplement supply system separates nitrogen from oxygen by air compressed gas through molecular sieve to obtain high-purity nitrogen, and is used for providing nitrogen required by deoxidization before operation of the sealed molten salt reaction system, the nitrogen of the nitrogen generation and supplement supply system is temporarily stored in the storage tank, is introduced into the sealed molten salt reaction system through the control valve, and is used for deoxidizing the space in the sealed molten salt reaction system.
8. A method for establishing a continuous reaction of molten salt thermal cracking, which is characterized in that the method is realized by adopting the continuous reaction system for establishing the molten salt thermal cracking according to any one of claims 1 to 7, and comprises the following steps:
(1) Utilizing a sealed molten salt reaction system as a reactant to generate a thermal cracking reaction tool;
(2) The suspended track-fixing conveying system is used as a conveying tool for conveying reactants and thermal cracking reaction products into and out of the sealed molten salt reaction system;
(3) The movable reaction frame is used as a movable bearing tool for reactants and thermal cracking reaction products;
(4) Using an oil gas condensation recovery system as a thermal cracking oil recovery tool;
(5) Using an RTO waste gas incineration treatment system as a thermal cracking non-condensable gas treatment tool;
(6) The absorption type ice water supply system is used as a waste gas treatment tail gas waste heat recovery tool;
(7) Using the molten salt storage and supplement supply system as a molten salt storage and supplement supply tool of the sealed molten salt reaction system;
(8) And a nitrogen generation and supplement system is used as a deoxidizing tool in the space of the sealed molten salt reaction system.
9. A method for establishing a continuous thermal cracking reaction of molten salt as defined in claim 8, comprising the specific steps of:
Step S1, deoxidizing in a sealed molten salt reaction system;
the nitrogen introduced into the sealed molten salt reaction system extrudes air originally existing in the space of the sealed molten salt reaction system, and the air enters an oil gas condensation recovery system, an RTO waste gas treatment system and an absorption type ice water supply system in sequence and is discharged; starting an RTO waste gas treatment system to perform operation preparation before treatment, and performing waste gas treatment when the incineration temperature is reached;
s2, fixedly introducing the movable reaction frame group into molten salt in a molten salt reaction tank through a suspension type conveying track to perform heating and thermal cracking reaction;
preparing operation of a suspended rail-fixing conveying system, starting a suspended conveying motor to perform conveying operation test, placing reactants on a movable reaction rack set, then hanging the movable reaction rack set on the suspended rail-fixing conveying system, starting the suspended conveying motor to operate, pulling a rail-fixing rolling pulley to operate in time, continuously advancing the movable reaction rack set filled with the reactants to a front water seal tank, enabling the movable reaction rack set to move down along with a suspended conveying rail to enter a water seal when passing through the front water seal tank, enabling water in the front water seal tank to extrude air entrained by the reactants in the movable reaction rack set, enabling the movable reaction rack set to move up along with the suspended conveying rail to above the molten salt reaction tank after water seal, enabling the movable reaction rack set to be introduced into molten salt of the molten salt reaction tank to perform heating and thermal cracking reaction through the suspended conveying rail, enabling thermal cracking gas to move up into a thermal cracking condensation recovery system, enabling thermal cracking time to be the same as the distance between the movable molten salt reaction tank of the suspended rail-fixing conveying system, enabling the movable reaction rack set to move up and down along with the suspended conveying rail, enabling the water in the front water seal tank to move down along with the water seal tank to move out of the suspended conveying rail, enabling the thermally cracked reaction rack to be moved out of the movable reaction rack set to be safely removed, and enabling the thermally cracked reaction set to be moved out and removed from the thermally cracked reaction set to be generated; the reactants are continuously conveyed into the sealed molten salt reaction system, so that thermal cracking reaction products can be continuously removed, and continuous reaction operation is realized;
Step S3, introducing thermal cracking gas generated by thermal cracking reaction into an oil-gas condensation recovery system, introducing circulating condensation cooling water, enabling the thermal cracking gas to be rapidly cooled to form thermal cracking oil, enabling the thermal cracking oil to flow down to the lower end of the oil-gas condensation recovery system along a condenser, and leading out the thermal cracking oil through a control valve; the condensed thermal cracking non-condensable gas is introduced into an RTO waste gas treatment system for treatment through an outlet, the non-condensable thermal cracking gas is incinerated by the RTO waste gas treatment system and converted into harmless tail gas, the tail gas is introduced into a rear absorption type ice water supply system, the heat energy of the tail gas is converted into condensation cooling water, the condensation cooling water is used as cooling ice water for oil gas condensation recovery, and then the tail gas is discharged through a chimney.
10. A method of establishing a thermal cracking continuous reaction of molten salt as defined in claim 9, further comprising, prior to step S1: step S0, before starting the fused salt thermal cracking continuous reaction system, preparing operation before operation is finished:
(1) Starting an absorption type ice water supply system to perform circulation operation of condensing and cooling ice water;
(2) Starting an RTO waste gas treatment system;
(3) Starting a molten salt storage and supplement supply system, introducing molten salt prepared in advance into a molten salt storage and supplement supply tank through a molten salt input port, starting a molten salt heater, melting the molten salt into liquid molten salt and reaching the thermal cracking demand temperature, starting a reaction tank heater of a molten salt reaction tank to preheat the molten salt reaction tank so as to prevent the molten salt from cooling and caking, and starting a molten salt circulating pump to circulate the molten salt after the reaction tank heater is preheated; supplementing water to the front water seal tank and the rear water seal tank, and introducing clear water to enable the isolation plate and the suspension conveying track to go deep under water seal, so that the sealed molten salt reaction system is completely isolated from an external space; and (3) introducing compressed air into a nitrogen generation and supplement supply system, leading out oxygen by the molecular sieve to leave nitrogen, and introducing the nitrogen above the molten salt reaction tank.
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