CN113236974B - Safe pipeline conveying method for high-concentration vinyl acetylene-rich alkyne carbon four - Google Patents
Safe pipeline conveying method for high-concentration vinyl acetylene-rich alkyne carbon four Download PDFInfo
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- CN113236974B CN113236974B CN202110466570.XA CN202110466570A CN113236974B CN 113236974 B CN113236974 B CN 113236974B CN 202110466570 A CN202110466570 A CN 202110466570A CN 113236974 B CN113236974 B CN 113236974B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/086—Pipe-line systems for liquids or viscous products for explosives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/35—Ohmic-resistance heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/70—Cooling of pipes or pipe systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a safe pipeline conveying method for high-concentration vinyl acetylene-rich alkyne carbon four, which comprises the steps of cooling high alkyne tail gas and non-alkyne carbon four tail gas respectively, diluting the high alkyne tail gas and the non-alkyne carbon four tail gas by using the latter, introducing mixed gas into a mixed gas storage tank, arranging a plurality of intermediate conveying buffer units between the mixed gas storage tank and a conveying terminal, and safely conveying the alkyne carbon four in a segmented conveying manner, wherein the intermediate conveying buffer units comprise conveying pipelines, intermediate buffer tanks, conveying pumps and cooling heat exchangers, an electric tracing heat insulation layer is arranged on the outer wall of each conveying pipeline, and a temperature sensor is arranged on each pipeline to monitor the temperature; the invention can realize safe, long-distance and convenient pipeline transportation by comprehensively and professionally controlling the concentration of the acetylene-rich vinylene, the pipeline transportation pressure and the transportation temperature.
Description
Technical Field
The invention relates to a method for transporting alkyne-rich C4, in particular to a method for transporting alkyne-rich C4 through a safe pipeline, which is rich in high-concentration vinyl acetylene.
Background
With the continuous and deep petrochemical processing, people increasingly pay attention to the reasonable utilization of each component in the carbon four-fraction by-products of liquefied gas, oilfield associated gas, oil refining devices, ethylene cracking devices and the like. The carbon four fraction is rich in acetylene hydrocarbons such as vinyl acetylene and ethyl acetylene, which are very easy to decompose and explode when the concentration of the acetylene hydrocarbons exceeds a certain value, wherein the most dangerous is the vinyl acetylene, and researches show that when the concentration of the vinyl acetylene hydrocarbons reaches or exceeds 80%, the decomposition and heat release reaction starts to occur at 140 ℃, and the explosion happens when the temperature reaches 165 ℃. At present, acetylene-carbon-four-rich production enterprises such as Shandong Biqing new energy, Anhui Haide and the like mainly transport the raw materials through automobiles, safety requirements of vinyl acetylene and the like are not fully considered in loading and unloading and transportation processes, great potential safety hazards exist, and meanwhile, a technology for carrying out safe pipeline transportation on high-concentration vinyl acetylene-carbon-four-rich materials does not exist in China at present.
The main factor affecting the safety of alkyne-rich carbon-tetratransfusions is the high concentration of vinylacetylene (typically above 30%) among them, which is the most unstable molecule among alkynes due to its extremely unsaturated molecular structure. According to the results of the prior researches, the liquid phase vinylacetylene mixture with the concentration of 40% is in a safe range when the pressure is less than 0.4MPa, the pressure is less than 0.7MPa when the concentration is 30%, and explosion can be avoided when the concentration of vinylacetylene is less than 50% and the gas phase partial pressure is less than 0.075 MPa.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a safe pipeline conveying method for high-concentration vinyl acetylene and acetylene-rich carbon four, which utilizes a long conveying pipeline to convey materials, can simultaneously meet two safety technical requirements of maintaining the concentration of the vinyl acetylene to be 10% and the gas-phase partial pressure to be not more than 0.075MPa on the whole line, and greatly improves the conveying safety.
The invention is realized by the following technical scheme:
a safe pipeline conveying method for high-concentration vinyl acetylene and acetylene-rich C4 comprises the following steps:
(1) the method comprises the following steps that a cooling heat exchanger is arranged at an input end of high alkyne tail gas to cool the tail gas, a cooling heat exchanger is arranged at an input end of non-alkyne-carbon-four tail gas to cool the tail gas, the non-alkyne-carbon-four tail gas is used for diluting the high alkyne tail gas, and the diluted mixed gas enters a mixed gas storage tank;
(2) arranging a plurality of intermediate conveying buffer units between the mixed gas storage tank and the conveying terminal in the step (1), and safely conveying the alkyne-rich C4 in a sectional conveying mode to control the conveying temperature of the alkyne-rich C4 and the gas-phase partial pressure of vinyl acetylene in the alkyne-rich C4 in the whole process;
the middle conveying buffer unit comprises a conveying pipeline, a middle buffer tank, a conveying pump and a cooling heat exchanger, wherein an electric heat tracing heat-insulating layer is arranged on the outer wall of the conveying pipeline, temperature sensors are arranged on the conveying pipeline at certain intervals, and the electric heat tracing heat-insulating layer and the cooling heat exchanger are electrically connected with each other.
In the technical scheme, the non-acetylene carbon four tail gas is used for diluting the high-alkyne tail gas after cooling, so that the low-temperature safe state of the mixed gas can be ensured, and the vinyl acetylene in the mixed gas is kept within a safe concentration range; the dilution ratio of the non-acetylene carbon four tail gas and the high-acetylene hydrocarbon tail gas can be realized by monitoring and analyzing the components of the latter and further adjusting the dilution amount of the former.
Because the pressure drop in the long-distance transportation process is large, if a high-lift delivery pump is utilized, the change of the air pressure in a pipeline in the delivery process can be caused, and the potential safety hazard is easily caused because the gas phase partial pressure of the vinyl acetylene is more than 0.075 MPa. Through setting up middle conveying buffer unit, adopt the mode of segmentation transport, control delivery pump's outlet pressure to combine together with middle buffer tank, can fully satisfy the requirement of vinyl acetylene gas phase partial pressure security in the transportation process.
Meanwhile, considering the influence of temperature on the safety of vinyl acetylene, potential safety hazards caused by direct sunlight, overhigh local temperature of a pipeline in the conveying process and the like are avoided, and therefore the cooling heat exchanger is arranged in the middle conveying buffer unit, and the electric tracing heat-insulating layer and the temperature sensor are arranged on the conveying pipeline. Properly adjusting the temperature of the diluted alkyne-rich carbon four according to the temperature change condition in the high-temperature transportation period in summer, and controlling the temperature of the material by using a cooling heat exchanger of the intermediate conveying buffer unit; during the transportation period in winter, because of containing a little water in the alkyne-rich carbon four, in order to avoid freezing of the pipeline, the electric heat tracing can be started on the whole line to adjust the temperature, so that the temperature of the material in the transportation process is ensured, and the safe transportation temperature of the alkyne-rich carbon four in the whole time is completely ensured.
As a further optimization of the technical scheme of the invention, the control temperature of the high alkyne tail gas and the non-alkyne carbon four tail gas in the step (1) is 5-7 ℃.
As a further optimization of the technical scheme of the invention, the concentration of the high alkyne tail gas diluted by the non-alkyne carbon four tail gas in the step (1) is 10-12%.
As a further optimization of the technical scheme of the invention, the whole-process safe transportation control temperature range of the alkyne-rich C4 in the step (2) is 2-15 ℃.
As a further optimization of the technical scheme of the invention, the controlled gas-phase partial pressure of the vinyl acetylene during the whole-course safe transportation of the alkyne-rich carbon IV in the step (2) is not more than 0.075 MPa; in order to guarantee the requirement, the outlet pressure of a delivery pump in the middle delivery buffer unit is not more than 0.6 MPa.
In conclusion, the safe pipeline conveying method for the high-concentration vinyl acetylene and acetylene-rich carbon four can realize safe, long-distance and convenient pipeline conveying through comprehensive and specialized control on the concentration of the vinyl acetylene, the pipeline conveying pressure and the conveying temperature of the acetylene-rich carbon four, avoid unsafe links such as loading and unloading, road transportation and the like, and fundamentally achieve the purpose of safe conveying.
Drawings
FIG. 1 is a flow diagram of an embodiment of the alkyne-rich C4-enriched safe pipeline transportation method of the present invention;
in the figure: the device comprises a 1-high alkyne tail gas input end, a 2-non-alkyne carbon four tail gas input end, a 3-cooling heat exchanger, a 4-mixed gas storage tank, a 5-delivery pump, a 6-delivery pipeline, a 7-intermediate buffer tank, an 8-electric heat tracing heat preservation layer, a 9-temperature sensor, a 10-delivery terminal and an A-delivery intermediate buffer unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 1 shows an embodiment of the safe pipeline method for transporting acetylene-rich carbon IV rich in high concentration of vinyl acetylene according to the invention.
As shown in figure 1, the safe pipeline conveying method for the high-concentration vinyl acetylene-rich alkyne carbon four comprises the following steps:
(1) a cooling heat exchanger is arranged at the input end of the high alkyne tail gas to cool the tail gas, the initial temperature of the high alkyne tail gas is 30 ℃, the concentration of vinyl acetylene is 31.69%, and the temperature after cooling and liquefaction is 6 ℃; a cooling heat exchanger is arranged at the input end of the non-alkyne-carbon four-tail gas to cool the tail gas, the initial temperature of the non-alkyne-carbon four-tail gas is 30 ℃, the non-alkyne-carbon four-tail gas does not contain vinyl acetylene, and the temperature of the non-alkyne-carbon four-tail gas is 6 ℃ after cooling and liquefaction; diluting the high alkyne tail gas by using the non-alkyne carbon four tail gas, wherein the concentration of the mixed vinyl acetylene is less than 10 percent, the temperature is 6 ℃, and the mixed gas enters a mixed gas storage tank;
(2) arranging three intermediate conveying buffer units between the mixed gas storage tank and the conveying terminal in the step (1), and safely conveying the alkyne-rich C4 in a sectional conveying mode to control the conveying temperature of the alkyne-rich C4 and the gas-phase partial pressure of vinyl acetylene in the alkyne-rich C4 in the whole process;
the middle conveying buffer unit comprises a conveying pipeline, a middle buffer tank, a conveying pump and a cooling heat exchanger, wherein an electric heat tracing heat-insulating layer is arranged on the outer wall of the conveying pipeline, temperature sensors are arranged on the conveying pipeline at certain intervals, and the electric heat tracing heat-insulating layer and the cooling heat exchanger are electrically connected with each other.
In the embodiment, the outlet pressure of all the delivery pumps in the intermediate delivery buffer unit is controlled not to exceed 0.6 MPa, so that the controlled gas-phase partial pressure of the vinyl acetylene in the acetylene-rich carbon-four delivery process is not more than 0.075 MPa.
In the embodiment, the cooling heat exchanger in the intermediate conveying buffer unit and the electric tracing heat preservation layer on the conveying pipeline are used for keeping the materials in the pipeline cold or hot, and the temperature sensor along the pipeline is used for monitoring the temperature on line, so that the temperature of the alkyne-rich carbon four in the conveying process is kept at 2-15 ℃ in summer and at 5-8 ℃ in winter.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to be encompassed by the present invention as set forth in the appended claims.
Claims (6)
1. A safe pipeline conveying method for high-concentration vinyl acetylene and acetylene-rich C4 is characterized by comprising the following steps:
(1) the method comprises the following steps that a cooling heat exchanger is arranged at an input end of high alkyne tail gas to cool the tail gas, a cooling heat exchanger is arranged at an input end of non-alkyne-carbon-four tail gas to cool the tail gas, the non-alkyne-carbon-four tail gas is used for diluting the high alkyne tail gas, and the diluted mixed gas enters a mixed gas storage tank;
(2) arranging a plurality of intermediate conveying buffer units between the mixed gas storage tank and the conveying terminal in the step (1), and safely conveying the alkyne-rich C4 in a sectional conveying mode to control the conveying temperature of the alkyne-rich C4 and the gas-phase partial pressure of vinyl acetylene in the alkyne-rich C4 in the whole process;
the middle conveying buffer unit comprises a conveying pipeline, a middle buffer tank, a conveying pump and a cooling heat exchanger, wherein an electric heat tracing heat-insulating layer is arranged on the outer wall of the conveying pipeline, temperature sensors are arranged on the conveying pipeline at certain intervals, and the electric heat tracing heat-insulating layer and the cooling heat exchanger are electrically connected with each other.
2. The alkyne-rich carbocycle safe pipe transportation method according to claim 1, wherein: the control temperature of the high alkyne tail gas and the non-alkyne carbon four tail gas in the step (1) is 5-7 ℃.
3. The alkyne-rich tetra carbon safe pipe transfer method of claim 1, wherein: the concentration of the high alkyne tail gas diluted by the non-alkyne carbon four tail gas in the step (1) is 10-12%.
4. The alkyne-rich carbocycle safe pipe transportation method according to claim 1, wherein: and (3) controlling the temperature range of the full-process safe transportation of the alkyne-rich C4 in the step (2) to be 2-15 ℃.
5. The alkyne-rich carbocycle safe pipe transportation method according to claim 1, wherein: and (3) controlling the gas-phase partial pressure of the vinyl acetylene to be not more than 0.075MPa during the whole-process safe transportation of the alkyne-rich carbon IV in the step (2).
6. The alkyne-rich carbocycle safe pipe transportation method according to claim 5, wherein: and (3) in the step (2), the outlet pressure of a delivery pump in the intermediate delivery buffer unit is not more than 0.6 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110466570.XA CN113236974B (en) | 2021-04-28 | 2021-04-28 | Safe pipeline conveying method for high-concentration vinyl acetylene-rich alkyne carbon four |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110466570.XA CN113236974B (en) | 2021-04-28 | 2021-04-28 | Safe pipeline conveying method for high-concentration vinyl acetylene-rich alkyne carbon four |
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| CN113236974B true CN113236974B (en) | 2022-05-24 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041700A (en) * | 2011-10-14 | 2013-04-17 | 中国石油化工股份有限公司 | Butadiene tail gas hydrogenation unit and hydrogenation method |
| CN105152840A (en) * | 2015-09-14 | 2015-12-16 | 中国成达工程有限公司 | Process for refining C-4 hydrocarbon fluid |
| CN105566032A (en) * | 2014-10-09 | 2016-05-11 | 中国石油化工股份有限公司 | Alkyne-rich C4 selective hydrogenation technology |
| CN107029567A (en) * | 2017-04-14 | 2017-08-11 | 中国石油化工股份有限公司 | Suppress the device and method that acetylene gas decomposes detonation |
| CN108218662A (en) * | 2016-12-21 | 2018-06-29 | 中国石化集团四川维尼纶厂 | The method of the middle-and-high-ranking alkynes recycling of gas by partial oxidation of natural acetylene technique |
| CN207635359U (en) * | 2017-12-13 | 2018-07-20 | 江苏斯尔邦石化有限公司 | A kind of MMA exhaust gas recovery systems |
| CN109485534A (en) * | 2017-09-12 | 2019-03-19 | 中国石化扬子石油化工有限公司 | A kind of method of DMF method butadiene extraction device tail gas hydrogenation |
| CN110252163A (en) * | 2019-07-03 | 2019-09-20 | 青海盐湖工业股份有限公司 | A kind of mixer protection system and method for vinyl chloride production |
| CN211170518U (en) * | 2019-11-26 | 2020-08-04 | 中国成达工程有限公司 | Advanced alkyne conveying device for preparing acetylene from natural gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO985001D0 (en) * | 1998-10-27 | 1998-10-27 | Eriksson Nyfotek As Leiv | Method and system for transporting a stream of fluid hydrocarbons containing water |
-
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- 2021-04-28 CN CN202110466570.XA patent/CN113236974B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103041700A (en) * | 2011-10-14 | 2013-04-17 | 中国石油化工股份有限公司 | Butadiene tail gas hydrogenation unit and hydrogenation method |
| CN105566032A (en) * | 2014-10-09 | 2016-05-11 | 中国石油化工股份有限公司 | Alkyne-rich C4 selective hydrogenation technology |
| CN105152840A (en) * | 2015-09-14 | 2015-12-16 | 中国成达工程有限公司 | Process for refining C-4 hydrocarbon fluid |
| CN108218662A (en) * | 2016-12-21 | 2018-06-29 | 中国石化集团四川维尼纶厂 | The method of the middle-and-high-ranking alkynes recycling of gas by partial oxidation of natural acetylene technique |
| CN107029567A (en) * | 2017-04-14 | 2017-08-11 | 中国石油化工股份有限公司 | Suppress the device and method that acetylene gas decomposes detonation |
| CN109485534A (en) * | 2017-09-12 | 2019-03-19 | 中国石化扬子石油化工有限公司 | A kind of method of DMF method butadiene extraction device tail gas hydrogenation |
| CN207635359U (en) * | 2017-12-13 | 2018-07-20 | 江苏斯尔邦石化有限公司 | A kind of MMA exhaust gas recovery systems |
| CN110252163A (en) * | 2019-07-03 | 2019-09-20 | 青海盐湖工业股份有限公司 | A kind of mixer protection system and method for vinyl chloride production |
| CN211170518U (en) * | 2019-11-26 | 2020-08-04 | 中国成达工程有限公司 | Advanced alkyne conveying device for preparing acetylene from natural gas |
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