CN115451717A - Waste heat recovery system of cracking furnace - Google Patents
Waste heat recovery system of cracking furnace Download PDFInfo
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- CN115451717A CN115451717A CN202211135484.1A CN202211135484A CN115451717A CN 115451717 A CN115451717 A CN 115451717A CN 202211135484 A CN202211135484 A CN 202211135484A CN 115451717 A CN115451717 A CN 115451717A
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- cleaning
- heat exchange
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- filter screen
- cavity
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- 238000011084 recovery Methods 0.000 title claims abstract description 60
- 239000002918 waste heat Substances 0.000 title claims abstract description 39
- 238000005336 cracking Methods 0.000 title claims abstract description 27
- 238000004140 cleaning Methods 0.000 claims abstract description 118
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000002912 waste gas Substances 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 230000010405 clearance mechanism Effects 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 11
- 238000007790 scraping Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000012546 transfer Methods 0.000 abstract description 28
- 238000000197 pyrolysis Methods 0.000 abstract description 5
- 239000005416 organic matter Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 description 27
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery system of a cracking furnace, which comprises a heat exchange box, a heat exchange mechanism, a filtering mechanism and a first cleaning mechanism, wherein the heat exchange box is provided with a cavity, an air inlet and an air outlet which are communicated with the cavity, and the air inlet is positioned at the bottom of the heat exchange box; the heat exchange mechanism comprises a heat exchange manifold arranged in the cavity; filtering mechanism sets up in the cavity and is located heat transfer mechanism's below, filtering mechanism includes the filter screen, first clearance mechanism is including rotatable setting in the swivel mount of filter screen bottom, drive assembly, doctor-bar and high temperature jet-propelled subassembly, the high temperature jet-propelled subassembly includes the jet-propelled pipe, be provided with the fumarole towards the filter screen bottom on the jet-propelled pipe, this waste heat recovery system of pyrolysis furnace is when carrying out heat recovery to some waste gases that contain insoluble organic matter, the convenience is cleared up the adnexed organic component of heat transfer incasement, guarantee waste heat recovery's normal clear, the improvement reliability of use.
Description
Technical Field
The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery system of a cracking furnace.
Background
The cracking furnace is a device for cracking hydrocarbons. The waste gas generated by the cracking furnace contains a large amount of heat, and the heat needs to be recycled. The waste heat recovery of current pyrolysis furnace generally through the heat transfer case carry out the heat transfer to waste gas can, but contain a lot of insoluble organic matters in the high temperature waste gas that the pyrolysis furnace produced, these insoluble organic matters are attached to the heat transfer manifold in the heat transfer case easily, influence the recovery effect to waste heat, can only carry out the inside clearance of heat transfer case at intervals and maintain, complex operation, and influence normal waste heat recovery operation, especially when carrying out waste heat recovery to some waste gases that contain a large amount of insoluble organic components, the frequency of clearance maintenance increases, lead to using the reliability lower.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the waste heat recovery system of the cracking furnace, which is convenient to clean the attached organic components in the heat exchange box when the waste heat recovery system of the cracking furnace recovers heat of waste gas containing insoluble organic matters, ensures the normal operation of waste heat recovery and improves the use reliability.
(II) technical scheme
To achieve the above object, an embodiment of the present application provides a waste heat recovery system of a cracking furnace, including: the heat exchange box is provided with a cavity, and an air inlet and an air outlet which are communicated with the cavity, and the air inlet is positioned at the bottom of the heat exchange box; the heat exchange mechanism comprises a heat exchange manifold arranged in the cavity; the filtering mechanism is arranged in the cavity and positioned below the heat exchange mechanism, and comprises a filter screen for intercepting organic components in the waste gas; first clearance mechanism, including rotatable set up in the swivel mount, the drive of filter screen bottom swivel mount pivoted drive assembly, set up in doctor-bar and the jet-propelled subassembly of high temperature on the swivel mount, the tip of doctor-bar with the bottom butt of filter screen, the jet-propelled subassembly of high temperature includes the jet-propelled pipe, be provided with the orientation on the jet-propelled pipe the fumarole of filter screen bottom.
In one possible implementation, the high temperature and high pressure gas injection assembly further includes a high temperature and high pressure assembly in communication with the gas injection pipe, the high temperature and high pressure assembly including: a cleaning tank having a cleaning chamber in a vertical direction; the valve plate is arranged in the cleaning cavity in a sliding mode, the outer peripheral side of the valve plate is abutted to the inner side wall of the cleaning cavity, a vent hole which is communicated up and down is formed in the valve plate, and a one-way valve is arranged in the vent hole; one end of the communicating hose penetrates through the valve plate from the top of the valve plate, and the other end of the communicating hose is communicated with the air injection pipe; the driving cylinder is arranged at the top of the cleaning tank, and the bottom output end of the driving cylinder is connected with the top of the valve plate; and the heating assembly is arranged in the cleaning cavity of the cleaning tank and used for heating the cleaning liquid in the cleaning tank.
In one possible implementation manner, one end of the heat exchange manifold is provided with an input pipe, and the other end of the heat exchange manifold is provided with an output pipe; the heating assembly is a heating coil communicated with the output pipe, and a switch valve is arranged on the heating coil.
In a possible implementation manner, a recovery cover is arranged inside the heat exchange box and located below the rotating frame and used for receiving sundries cleaned by the scraping blades, a recovery pipe is communicated with the bottom of the recovery cover and extends out of the heat exchange box.
In a possible implementation manner, a diversion trench is arranged at the top of the rotating frame, a communication hole communicated with the bottom of the diversion trench is arranged at the bottom of the rotating frame, and one end, abutted against the filter screen, of the scraping blade is located right above the diversion trench.
In a possible implementation manner, the filter screen comprises a first annular net, a second annular net and a circular net, wherein the first annular net and the second annular net are both of a structure with a high outer part and a low inner part, the outer ring of the second annular net is connected with the inner ring of the first annular net, the inner ring of the second annular net is connected with the outer ring of the circular net, and the rotary frame, the air injection pipe and the scraper are matched with the structure of the filter screen.
In one possible implementation, the drive assembly includes: the driving pipe penetrates through the middle part of the filter screen and is rotatably connected with the filter screen through a bearing, and the bottom of the driving pipe is connected with the rotating frame; the driving motor is arranged outside the heat exchange box, and the output end of the driving motor is in transmission connection with the driving pipe through a transmission part; the air injection pipe is communicated with the driving pipe, and one end of the communication hose, which is far away from the cleaning tank, is rotatably connected with the top of the driving pipe.
In one possible implementation manner, the heat exchange manifold is vertically disposed in the cavity, and the waste heat recovery system of the cracking furnace further includes a second cleaning mechanism, where the second cleaning mechanism includes: the cleaning plate is arranged in the cavity in a sliding mode along the vertical direction, cleaning holes which are communicated up and down are formed in the cleaning plate, cleaning rings are arranged in the cleaning holes, the cleaning rings are sleeved on the outer peripheral side of the heat exchange manifold, and the cleaning rings are abutted to the outer peripheral side of the heat exchange manifold; and the lifting assembly is arranged at the top of the heat exchange box and used for driving the cleaning plate to lift.
In a possible implementation manner, one end of the cleaning ring connected with the cleaning plate is higher than one end of the cleaning ring abutted against the heat exchange manifold, an exhaust port penetrating through the inner surface and the outer surface of the cleaning ring is formed in the cleaning ring, and the exhaust port is adjacent to the bottom of the cleaning ring.
In a possible implementation manner, a flow guide piece is arranged at the bottom of the heat exchange manifold, and an output end of the flow guide piece extends out of the heat exchange box.
(III) advantageous effects
Compared with the prior art, the invention provides a waste heat recovery system of a cracking furnace, which has the following beneficial effects: this waste heat recovery system of pyrolysis furnace, when carrying out heat recovery to some waste gases that contain insoluble organic matter, waste gas passes through the air inlet and gets into the heat transfer incasement, at first filter the organic composition in to waste gas through the filter screen, make organic composition adhere to on the filter screen, drive the swivel mount through drive assembly and rotate, high temperature jet-propelled subassembly spouts the bottom at the filter screen through the fumarole with high temperature cleaning gas, dissolve adnexed organic composition on the filter screen, doctor-bar through on the swivel mount scrapes the organic composition of dissolving on the rotatory in-process with the filter screen, thereby accomplish the clearance to organic composition on the filter screen, the convenience is cleared up adnexed organic composition in the heat transfer incasement, guarantee waste heat recovery's normal clear up, improve the use reliability.
Drawings
Fig. 1 is a schematic perspective view illustrating a waste heat recovery system of a cracking furnace according to an embodiment of the present disclosure;
FIG. 2 is a schematic perspective view of a rotary frame, a driving tube, a wiper blade and a gas injection tube provided in the embodiment of the present application;
FIG. 3 shows a schematic perspective view of FIG. 2 at another angle;
fig. 4 is a schematic perspective view illustrating a filter screen and a rotating frame according to an embodiment of the present disclosure;
FIG. 5 is a schematic perspective view illustrating a cleaning plate according to an embodiment of the present disclosure;
fig. 6 shows a schematic perspective view of a cleaning plate and a cleaning ring provided in an embodiment of the present application.
In the drawings, the reference numbers:
1. a heat exchange box; 11. an air inlet; 12. an exhaust port; 13. a recovery cover; 14. a recovery pipe;
2. a heat exchange mechanism; 21. a heat exchange manifold; 22. an input tube; 23. an output pipe; 24. a drainage member;
3. a filtering mechanism; 31. a filter screen; 311. a first endless web; 312. a second endless web; 313. a circular net;
4. a first cleaning mechanism; 41. a rotating frame; 411. a diversion trench; 412. a communicating hole; 42. a drive assembly; 421. a drive tube; 422. a drive motor; 423. sealing the baffle plate; 424. a buffer spring; 43. scraping a blade; 44. a high temperature gas injection assembly; 441. a gas injection pipe; 4411. a gas injection hole; 442. a high temperature and high pressure component; 4421. cleaning the tank; 4422. a valve plate; 4423. a one-way valve; 4424. a communication hose; 4425. a driving cylinder; 4426. a heating assembly;
5. a second cleaning mechanism; 51. cleaning the plate; 511. cleaning the holes; 52. cleaning a ring; 521. a drain port; 53. and (4) lifting the assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Fig. 1 is a schematic perspective view illustrating a waste heat recovery system of a cracking furnace according to an embodiment of the present disclosure; FIG. 2 is a schematic perspective view of a rotary frame, a driving tube, a scraping blade and a gas spraying tube provided by the embodiment of the application; FIG. 3 shows a schematic perspective view of FIG. 2 at another angle; fig. 4 is a schematic perspective view illustrating a filter screen and a rotating frame according to an embodiment of the present disclosure; FIG. 5 is a schematic perspective view illustrating a cleaning plate according to an embodiment of the present disclosure; fig. 6 shows a schematic perspective view of a cleaning plate and a cleaning ring provided in an embodiment of the present application.
As shown in fig. 1 to 6, the present application provides a waste heat recovery system of a cracking furnace, including: heat exchange box 1, heat transfer mechanism 2, filtering mechanism 3 and first clearance mechanism 4, wherein:
the heat exchange box 1 is provided with a cavity, and an air inlet 11 and an air outlet 12 which are communicated with the cavity, wherein the air inlet 11 is positioned at the bottom of the heat exchange box 1.
The heat exchange mechanism 2 comprises a heat exchange manifold 21 arranged in the cavity. The heat exchange manifold 21 exchanges heat with the high-temperature exhaust gas flowing through the heat exchange box 1 in the heat exchange box 1, thereby recovering the exhaust heat.
The filtering mechanism 3 is arranged in the cavity and positioned below the heat exchange mechanism 2, and the filtering mechanism 3 comprises a filter screen 31 for intercepting organic components in the waste gas.
First clearance mechanism 4 includes rotatable setting in the swivel mount 41 of filter screen 31 bottom, drives swivel mount 41 pivoted drive assembly 42, sets up doctor-bar 43 and the jet-propelled subassembly 44 of high temperature on swivel mount 41, and the tip of doctor-bar 43 and the bottom butt of filter screen 31, and the jet-propelled subassembly 44 of high temperature includes jet-propelled pipe 441, is provided with the fumarole 4411 towards the filter screen 31 bottom on the jet-propelled pipe 441.
In this application, when carrying out heat recovery to some waste gases that contain insoluble organic matter, waste gas passes through air inlet 11 and gets into in the heat transfer case 1, at first filter screen 31 organic composition in to waste gas filters, make organic composition adhere to on filter screen 31, drive swivel mount 41 through drive assembly 42 and rotate, high temperature jet assembly 44 spouts high temperature cleaning gas in the bottom of filter screen 31 through fumarole 4411, dissolve adnexed organic composition on filter screen 31, doctor-bar 43 through on the swivel mount 41 scrapes the organic composition of dissolving on the rotatory in-process with filter screen 31, thereby accomplish the clearance to organic composition on the filter screen 31, the convenience is cleared up the adnexed organic composition in the heat transfer case 1, guarantee waste heat recovery's normal clear, improve the use reliability.
In some embodiments, the high temperature and high pressure assembly 44 further comprises a high temperature and high pressure assembly 442 in communication with the gas lance 441, the high temperature and high pressure assembly 442 comprising: a cleaning tank 4421, a valve plate 4422, a communication hose 4424, a driving cylinder 4425 and a heating assembly 4426, wherein:
the cleaning tank 4421 has a cleaning chamber in a vertical direction.
The valve plate 4422 is arranged in the cleaning cavity in a sliding manner, the outer peripheral side of the valve plate 4422 is abutted against the inner side wall of the cleaning cavity, a vent hole which penetrates up and down is formed in the valve plate 4422, and a check valve 4423 is arranged in the vent hole.
The communication hose 4424 has one end penetrating the valve plate 4422 from the top of the valve plate 4422 and the other end communicating with the gas ejecting pipe 441.
The driving cylinder 4425 is disposed at the top of the cleaning tank 4421, and the bottom output end of the driving cylinder 4425 is connected with the top of the valve plate 4422.
The heating assembly 4426 is disposed in the cleaning chamber of the cleaning tank 4421 and heats the cleaning solution in the cleaning tank 4421. Specifically, the cleaning solution is an organic solvent for dissolving organic components attached to the filter screen 31, and the cleaning solution may be an acetone cleaning solution.
In this application, heat the washing liquid in the washing jar 4421 through heating element 4426, drive valve plate 4422 downstream through driving actuating cylinder 4425, compress the gas in the washing jar 4421 for gas in the washing jar 4421 gets into in the gas nozzle 441 through the intercommunication hose 4424 and through the fumarole 4411 blowout, thereby realize spraying the cleaning gas on filter screen 31, need not to heat the washing liquid in the washing jar 4421 alone, directly utilize the medium heat in the heat transfer manifold 21 can. When the valve plate 4422 moves downwards, the vent hole is in a closed state, so that the valve plate 4422 can pump gas or liquid in the cleaning cavity into the gas spraying pipe 441, and when the valve plate 4422 moves upwards, the vent hole is in an open state, so that the valve plate 4422 can move upwards smoothly, a simple pumping structure is formed, and cleaning liquid can be conveyed into the gas spraying pipe 441 at a certain pressure when the filter screen 31 is cleaned.
Alternatively, the cleaning liquid in the cleaning tank 4421 may be pressed into the gas injection pipe 441 through the valve plate 4422 to be sprayed, and the gas injection hole 4411 may be replaced by a nozzle, so that the cleaning liquid is sprayed through the nozzle to clean the organic component on the filter screen 31.
The state of the cleaning liquid and the type of the cleaning liquid to be used may be determined according to the type of the organic component in the exhaust gas.
In some embodiments, one end of the heat exchange manifold 21 is provided with an input pipe 22, and the other end is provided with an output pipe 23; the heating element 4426 is a heating coil which is in communication with the output pipe 23 and is provided with a switch valve.
In this application, the medium passes through input tube 22 and gets into heat transfer manifold 21, carries out the heat transfer with waste gas in heat transfer case 1, then exports the medium after will rising temperature through output tube 23, realizes the recovery to waste heat, and the medium after the intensification can get into in the heating coil through output tube 23, and the washing liquid in to wasing jar 4421 is heaied through the heating coil, with the washing liquid intensifies required temperature and state. Can open and close heating coil through the ooff valve, when needing to heat the washing liquid, open the ooff valve, when need not to heat the washing liquid, close the ooff valve can, it is concrete, can be before needs wash the operation temporarily to the washing liquid heat can.
In some embodiments, a recovery cover 13 is disposed inside the heat exchange box 1, the recovery cover 13 is located below the rotating frame 41 and is used for receiving sundries cleaned by the scraping blade 43, and a recovery pipe 14 is disposed at the bottom of the recovery cover 13 in a communicating manner, and the recovery pipe 14 extends out of the heat exchange box 1.
In this application, the debris that doctor-bar 43 washd down fall in retrieving cover 13, then retrieve through recovery tube 14, realize the recycle to organic composition, even derive heat exchange case 1 with organic composition, avoid causing the influence to the heat transfer.
In some embodiments, the top of the rotating frame 41 is provided with a guiding groove 411, the bottom of the rotating frame 41 is provided with a communicating hole 412 communicated with the bottom of the guiding groove 411, and one end of the scraping blade 43 abutting against the filter screen 31 is located right above the guiding groove 411.
In this application, the washing liquid sprays in the bottom of filter screen 31 through fumarole 4411, dissolves filter screen 31 bottom adnexed organic composition, makes things convenient for doctor-bar 43 to clear up, then scrapes the organic composition of filter screen 31 bottom together with the washing liquid mixture from filter screen 31 under the effect of scraping of doctor-bar 43, and the impurity of gathering falls in guiding gutter 411 of below, flows in guiding gutter 411 and in the recovery cover 13 of below flows in through the intercommunicating pore 412 of bottom.
In some embodiments, the filter screen 31 comprises a first annular net 311, a second annular net 312 and a circular net 313, wherein the first annular net 311 and the second annular net 312 are both in a structure with a high outside and a low inside, the outer ring of the second annular net 312 is connected with the inner ring of the first annular net 311, the inner ring of the second annular net 312 is connected with the outer ring of the circular net 313, and the rotating frame 41, the air injection pipe 441 and the scraping blade 43 are matched with the structure of the filter screen 31.
In this application, through setting filter screen 31 to first looped netowrk 311, second looped netowrk 312 and circular net 313, make filter screen 31's bottom include two inclined planes and a plane, both can effectively increase filter area, and the filter screen 31 that the slope set up makes things convenient for organic composition and washing liquid downflow to circular net 313 department, swivel mount 41, doctor-bar 43 and jet-propelled pipe 441's shape and filter screen 31's shape phase-match, make doctor-bar 43 can fully laminate with filter screen 31's bottom, and then clear up filter screen 31 bottom adnexed debris.
In some embodiments, the drive assembly 42 includes: a drive tube 421 and a drive motor 422, wherein:
the driving pipe 421 penetrates through the middle part of the filter screen 31 and is rotatably connected with the filter screen 31 through a bearing, and the bottom of the driving pipe is connected with the rotating frame.
The driving motor 422 is arranged outside the heat exchange box 1, and the output end of the driving motor 422 is in transmission connection with the driving pipe 421 through a transmission member;
wherein, the gas injection pipe 441 is communicated with the driving pipe 421, and one end of the communication hose 4424 far away from the cleaning tank 4421 is rotatably connected with the top of the driving pipe 421.
Specifically, the swivel mount is run through to the bottom of driving tube 421 to be provided with seal baffle 423 in the bottom of driving tube 421, seal baffle 423's top is provided with buffer spring 424, and buffer spring 424's top and swivel mount 41's bottom butt can provide an ascending thrust for swivel mount 41, and then make doctor-bar 43 can be abundant with the bottom butt of filter screen, the doctor-bar sets up for the slope, conveniently clears up the debris of filter screen bottom at rotatory in-process.
In this application, driving motor 422 drives the driving tube 421 through the driving medium and rotates, and the driving tube 421 drives swivel mount 41 and doctor blade 43 and jet-propelled pipe 441 and rotates, and then clears up the bottom of whole filter screen 31, and rotary seal intercommunication is passed through with the top of driving tube 421 to the one end of intercommunication hose 4424 for let in jet-propelled pipe 441 with high temperature high pressure cleaning gas through driving tube 421.
In some embodiments, the heat exchange manifold 21 is vertically disposed in the cavity, the waste heat recovery system of the cracking furnace further comprises a second cleaning mechanism 5, and the second cleaning mechanism 5 comprises: a cleaning plate 51 and a lifting assembly 53, wherein:
the cleaning plate 51 is arranged in the cavity in a sliding mode along the vertical direction, a cleaning hole 511 which is through up and down is formed in the cleaning plate 51, a cleaning ring 52 is arranged in the cleaning hole 511, the cleaning ring 52 is sleeved on the outer peripheral side of the heat exchange manifold 21, and the cleaning ring 52 is abutted to the outer peripheral side of the heat exchange manifold 21. The heat exchange manifold is a series or parallel vertical pipe, the top and the bottom of the vertical pipe are connected through an elbow, and the cleaning ring cleans the vertical pipe.
The lifting assembly 53 is arranged at the top of the heat exchange box 1 and used for driving the cleaning plate 51 to lift. The lifting assembly 53 may be a pneumatic cylinder, a hydraulic cylinder or a winch, and when the lifting assembly is a winch, the cleaning plate slides downward under the action of its own weight.
In this application, promote subassembly 53 and promote cleaning plate 51 after the take the altitude, make cleaning plate 51 be located the top of gas vent 12, this is that waste gas gets into heat transfer case 1 by air inlet 11 and discharges through gas vent 12, filter screen 31 can't filter out all organic composition, still have some organic composition and adhere to the surface at heat transfer manifold 21, cleaning plate 51 slides downwards under the effect that promotes subassembly 53 or under the action of gravity of self, make cleaning ring 52 on the cleaning plate 51 can clear up the surface of heat transfer manifold 21, scrape the adnexed organic composition impurity of heat transfer manifold 21 surface, the realization is cleared up the impurity on heat transfer manifold 21 surface, avoid impurity to adhere to in the outward appearance of heat transfer manifold 21 and influence the heat transfer effect.
Furthermore, the end of the cleaning ring 52 connected to the cleaning plate 51 is higher than the end abutting against the heat exchange manifold 21, and the cleaning ring 52 is provided with a drain opening 521 penetrating through the inner and outer surfaces of the cleaning ring 52, and the drain opening 521 is adjacent to the bottom of the cleaning ring 52.
In the application, when the cleaning ring 52 moves downwards, the impurities attached to the outer surface of the heat exchange manifold 21 are shoveled off by the cleaning ring 52, when the cleaning ring 52 moves upwards along with the cleaning plate 51, a small amount of organic impurities are left between the cleaning ring 52 and the heat exchange manifold 21 and then are discharged through the discharge port 521 on the cleaning ring 52, so that the problem that the impurities on the outer surface of the heat exchange manifold 21 are scraped upwards by the cleaning ring 52 is effectively solved, and because the heat exchange manifold 21 has high temperature, the impurities attached to the heat exchange manifold 21 are generally in a flowing state, and the impurities on the surface of the heat exchange manifold 21 are conveniently cleaned.
In some embodiments, the bottom of the heat exchange manifold 21 is provided with a flow guide 24, and the output end of the flow guide 24 extends to the outside of the heat exchange box 1.
In this application, carry out the drainage to the debris that assemble heat transfer manifold 21 bottom through drainage piece 24 to drainage the bottom of debris to heat transfer case 1.
Optionally, a guide plate may be further disposed at the bottom of the heat exchange manifold 21 to guide the impurities collected at the bottom of the heat exchange manifold 21.
This waste heat recovery system of pyrolysis furnace, when carrying out heat recovery to some waste gases that contain insoluble organic matter, waste gas passes through air inlet 11 and gets into in the heat transfer case 1, at first filter the organic composition in the waste gas through filter screen 31 and filter, make organic composition adhere to on filter screen 31, drive swivel mount 41 through drive assembly 42 and rotate, high temperature jet-propelled subassembly 44 spouts high temperature cleaning gas in the bottom of filter screen 31 through fumarole 4411, dissolve adnexed organic composition on the filter screen 31, scrape the dissolved organic composition on filter screen 31 at rotatory in-process through doctor-bar 43 on the swivel mount 41, thereby accomplish the clearance to organic composition on the filter screen 31, conveniently clear up adnexed organic composition in the heat transfer case 1, guarantee waste heat recovery's normal clear, improve the reliability of use.
It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
It should be readily understood that "on 8230; \8230on", "on 82308230;," on 82308230; \823030ja above "and" on 8230; \8230on "in the present disclosure should be interpreted in the broadest manner so that" on 8230; "on not only means" directly on something ", but also includes the meaning of" on something "with intermediate features or layers in between, and" over "\8230: \8230or \8230: \8230, above" includes not only the meaning of "over" or "on" something, but also the meaning of "over" or "on" with no intervening features or layers therebetween (i.e., directly on something).
Furthermore, spatially relative terms, such as "under," "below," "beneath," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly as well.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A waste heat recovery system for a cracking furnace, comprising:
the heat exchange box (1) is provided with a cavity, and an air inlet (11) and an air outlet (12) which are communicated with the cavity, wherein the air inlet (11) is positioned at the bottom of the heat exchange box (1);
the heat exchange mechanism (2) comprises a heat exchange manifold (21) arranged in the cavity;
the filtering mechanism (3) is arranged in the cavity and is positioned below the heat exchange mechanism (2), and the filtering mechanism (3) comprises a filter screen (31) for intercepting organic components in the waste gas;
first clearance mechanism (4), including rotatable set up in swivel mount (41), the drive of filter screen (31) bottom swivel mount (41) pivoted drive assembly (42), set up in doctor-bar (43) and the jet-propelled subassembly of high temperature (44) on swivel mount (41), the tip of doctor-bar (43) with the bottom butt of filter screen (31), the jet-propelled subassembly of high temperature (44) includes jet-propelled pipe (441), be provided with the orientation on jet-propelled pipe (441) jet orifice (4411) of filter screen (31) bottom.
2. The waste heat recovery system of a cracking furnace according to claim 1, wherein the high temperature and high pressure gas injection assembly (44) further comprises the high temperature and high pressure assembly (442) communicating with the gas injection pipe (441), the high temperature and high pressure assembly (442) comprising:
a washing tank (4421) having a washing chamber in a vertical direction;
the valve plate (4422) is arranged in the cleaning cavity in a sliding mode, the outer peripheral side of the valve plate (4422) is abutted to the inner side wall of the cleaning cavity, a vent hole which penetrates through the valve plate (4422) up and down is formed in the valve plate, and a one-way valve (4423) is arranged in the vent hole;
a communication hose (4424) having one end penetrating the valve plate (4422) from the top of the valve plate (4422) and the other end communicating with the gas injection pipe (441);
the driving air cylinder (4425) is arranged at the top of the cleaning tank (4421), and the bottom output end of the driving air cylinder (4425) is connected with the top of the valve plate (4422); and
the heating assembly (4426) is arranged in the cleaning cavity of the cleaning tank (4421) and is used for heating the cleaning liquid in the cleaning tank (4421).
3. The waste heat recovery system of a cracking furnace according to claim 2, wherein the heat exchange manifold (21) is provided with an input pipe (22) at one end and an output pipe (23) at the other end; the heating assembly (4426) is a heating coil communicated with the output pipe (23), and a switch valve is arranged on the heating coil.
4. The waste heat recovery system of the cracking furnace according to claim 1, wherein a recovery cover (13) is disposed inside the heat exchange box (1), the recovery cover (13) is located below the rotating frame (41) and is used for receiving the impurities cleaned by the scraper (43), a recovery pipe (14) is disposed at the bottom of the recovery cover (13) in a communicating manner, and the recovery pipe (14) extends out of the heat exchange box (1).
5. The waste heat recovery system of the cracking furnace according to claim 4, wherein a diversion trench (411) is formed in the top of the rotating frame (41), a communication hole (412) communicated with the bottom of the diversion trench (411) is formed in the bottom of the rotating frame (41), and one end, abutted against the filter screen (31), of the scraping blade (43) is located right above the diversion trench (411).
6. The waste heat recovery system of a cracking furnace according to claim 5, wherein the filtering net (31) comprises a first annular net (311), a second annular net (312) and a circular net (313), the first annular net (311) and the second annular net (312) are both in a structure with a high outside and a low inside, the outer ring of the second annular net (312) is connected with the inner ring of the first annular net (311), the inner ring of the second annular net (312) is connected with the outer ring of the circular net (313), and the rotating frame (41), the gas injection pipe (441) and the scraping blade (43) are matched with the structure of the filtering net (31).
7. Waste heat recovery system of a cracking furnace according to claim 2, characterized in that the driving assembly (42) comprises:
the driving pipe (421) penetrates through the middle part of the filter screen (31) and is rotatably connected with the filter screen (31) through a bearing, and the bottom of the driving pipe (421) is connected with the rotating frame; and
the driving motor (422) is arranged outside the heat exchange box (1), and the output end of the driving motor (422) is in transmission connection with the driving pipe (421) through a transmission piece;
wherein the gas spraying pipe (441) is communicated with the driving pipe (421), and one end of the communication hose (4424) far away from the cleaning tank (4421) is rotatably connected with the top of the driving pipe (421).
8. The waste heat recovery system of a cracking furnace according to claim 1, wherein the heat exchange manifold (21) is vertically disposed in the cavity, the waste heat recovery system of a cracking furnace further comprises a second cleaning mechanism (5), and the second cleaning mechanism (5) comprises:
the cleaning plate (51) is arranged in the cavity in a sliding mode along the vertical direction, a cleaning hole (511) which is communicated up and down is formed in the cleaning plate (51), a cleaning ring (52) is arranged in the cleaning hole (511), the cleaning ring (52) is sleeved on the outer peripheral side of the heat exchange manifold (21), and the cleaning ring (52) is abutted to the outer peripheral side of the heat exchange manifold (21); and
the lifting assembly (53) is arranged at the top of the heat exchange box (1) and used for driving the cleaning plate (51) to lift.
9. The waste heat recovery system of a cracking furnace according to claim 8, wherein the cleaning ring (52) is connected to the cleaning plate (51) at a higher end than the end abutting against the heat exchange manifold (21), and the cleaning ring (52) is provided with a drain opening (521) penetrating through the inner and outer surfaces of the cleaning ring (52), and the drain opening (521) is adjacent to the bottom of the cleaning ring (52).
10. Waste heat recovery system of a cracking furnace according to claim 9, characterized in that the bottom of the heat exchange manifold (21) is provided with a flow guide (24), and the output end of the flow guide (24) extends to the outside of the heat exchange box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211135484.1A CN115451717A (en) | 2022-09-19 | 2022-09-19 | Waste heat recovery system of cracking furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211135484.1A CN115451717A (en) | 2022-09-19 | 2022-09-19 | Waste heat recovery system of cracking furnace |
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| Publication Number | Publication Date |
|---|---|
| CN115451717A true CN115451717A (en) | 2022-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211135484.1A Pending CN115451717A (en) | 2022-09-19 | 2022-09-19 | Waste heat recovery system of cracking furnace |
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| Country | Link |
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| CN (1) | CN115451717A (en) |
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| US3613333A (en) * | 1969-07-17 | 1971-10-19 | Hugh E Gardenier | Process and apparatus for cleaning and pumping contaminated industrial gases |
| US20130199566A1 (en) * | 2010-04-03 | 2013-08-08 | Jens Werner Kipp | Method and device for cleaning filters |
| WO2021208189A1 (en) * | 2020-04-16 | 2021-10-21 | 苏州邦提克智能科技有限公司 | Online automatic cleaning and oil removing device |
| CN214680851U (en) * | 2021-03-12 | 2021-11-12 | 天津汇能朗天环保设备有限公司 | Industrial waste gas purification treatment device with waste heat recycling function |
| CN215598205U (en) * | 2021-06-21 | 2022-01-21 | 浙江科锋冷却塔有限公司 | Novel cooling tower |
| CN216367082U (en) * | 2021-11-10 | 2022-04-26 | 天泓环境科技有限责任公司 | Collect purification evacuation in odor gas processing apparatus of an organic whole |
| CN217358095U (en) * | 2022-01-06 | 2022-09-02 | 个旧市云新有色电解有限公司 | Rotary kiln head high-temperature smoke closed type recovery system |
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2022
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3613333A (en) * | 1969-07-17 | 1971-10-19 | Hugh E Gardenier | Process and apparatus for cleaning and pumping contaminated industrial gases |
| US20130199566A1 (en) * | 2010-04-03 | 2013-08-08 | Jens Werner Kipp | Method and device for cleaning filters |
| WO2021208189A1 (en) * | 2020-04-16 | 2021-10-21 | 苏州邦提克智能科技有限公司 | Online automatic cleaning and oil removing device |
| CN214680851U (en) * | 2021-03-12 | 2021-11-12 | 天津汇能朗天环保设备有限公司 | Industrial waste gas purification treatment device with waste heat recycling function |
| CN215598205U (en) * | 2021-06-21 | 2022-01-21 | 浙江科锋冷却塔有限公司 | Novel cooling tower |
| CN216367082U (en) * | 2021-11-10 | 2022-04-26 | 天泓环境科技有限责任公司 | Collect purification evacuation in odor gas processing apparatus of an organic whole |
| CN217358095U (en) * | 2022-01-06 | 2022-09-02 | 个旧市云新有色电解有限公司 | Rotary kiln head high-temperature smoke closed type recovery system |
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Application publication date: 20221209 |