CN110013627B - Parallel plate flame arrester with protruding structure - Google Patents
Parallel plate flame arrester with protruding structure Download PDFInfo
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- CN110013627B CN110013627B CN201810019214.1A CN201810019214A CN110013627B CN 110013627 B CN110013627 B CN 110013627B CN 201810019214 A CN201810019214 A CN 201810019214A CN 110013627 B CN110013627 B CN 110013627B
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- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 54
- 239000010935 stainless steel Substances 0.000 claims abstract description 54
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 3
- 230000006872 improvement Effects 0.000 abstract description 12
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical group N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 44
- 239000002360 explosive Substances 0.000 description 32
- 150000003254 radicals Chemical class 0.000 description 25
- 238000006243 chemical reaction Methods 0.000 description 20
- 238000003860 storage Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 17
- 239000007788 liquid Substances 0.000 description 12
- 238000005474 detonation Methods 0.000 description 11
- 239000003063 flame retardant Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 10
- 238000004200 deflagration Methods 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- AMIMRNSIRUDHCM-UHFFFAOYSA-N Isopropylaldehyde Chemical compound CC(C)C=O AMIMRNSIRUDHCM-UHFFFAOYSA-N 0.000 description 2
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- -1 naphtha Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model relates to a parallel plate flame arrester with a convex structure, which mainly solves the problems of narrow application range and reduced economy caused by improvement of flame-arresting performance of the parallel plate flame arrester in the prior art. The utility model adopts a parallel plate flame arrester with a convex structure, which comprises a left cylinder body, a right cylinder body and a flame-retardant core, wherein the left cylinder body and the right cylinder body are symmetrically arranged, flanges are arranged at both ends of the left cylinder body and the right cylinder body, the cylinder body is convenient to assemble and connect a pipeline, the flame-retardant core is arranged in the cylinder body, the flame-retardant core is formed by combining a plurality of stainless steel flat plates with convex structures in parallel, and the stainless steel flat plates are jointly supported and fixed by clamping pieces positioned on the inner walls of the left cylinder body and the right cylinder body and supporting plates at both ends.
Description
Technical Field
The utility model belongs to the field of fire retarding equipment, relates to a pipeline accessory, and in particular relates to a parallel plate flame arrester which can be installed in a flammable and explosive gas pipeline or at the top end of a volatile liquid storage tank.
Background
A large amount of gas burns and explodes vigorously, causing a fire. The top of the storage tank for volatile liquid often accumulates volatile inflammable gas, and the existing method is that a channel is arranged at the top of the storage tank to enable the inflammable gas to be collected into a main conveying pipeline, and the inflammable gas is conveyed to a torch for burning through the pipeline, so that once the conveying pipeline catches fire, the inflammable gas easily spreads to the storage tank to cause explosion of the storage tank, and huge property loss is caused. Therefore, a flame arrester is usually arranged on the flammable and explosive gas pipeline and at the top of the volatile liquid storage tank, so that the flame arrester plays a role in preventing external flames from being blown into equipment or pipelines storing flammable and explosive gases or preventing the flames from spreading between the equipment or the pipelines.
The flame arrestor structure has a significant impact on its flame-retardant properties. The utility model patent of application publication number CN104274929A discloses a detonation-resistant flame arrester, which has a key structure that is a bowl-shaped buffer device; the utility model patent of application publication number CN106110538A discloses a pipeline flame arrester, wherein a flame arrester core is columnar and is formed by adopting metal powder metallurgy high-temperature sintering; the patent of the utility model of the issued publication number CN202130761U discloses a butt-clamped corrugated plate flame arrester. The buffer device has great influence on the fire arrestor, and the fire arrestor core structure is also of great importance. Besides reported corrugated plates, powder sintering materials and the like, the parallel plates are widely used due to the characteristics of simple structure and easy cleaning. The parallel plate fire barrier is a barrier structure, also known as a barrier fire arrestor. The utility model patent with the publication number of CN204677263U and the utility model patent with the publication number of CN103104322B each disclose an explosion-proof diesel fence type flame arrester, however, the CN204677263U and the CN103104322B are only applicable to an explosion-proof diesel exhaust system, have a narrow application range and cannot be applied to the top of a storage tank of a flammable and explosive gas conveying pipeline or volatile liquid and the like. It is highly desirable to design a parallel plate flame arrester which has a wide application range and can be used for the top of a flammable and explosive gas conveying pipeline or a volatile liquid storage tank.
The improvement of the fire retarding performance of the parallel plate flame arrestor is contradicted with the economy thereof. To obtain high fire resistance, a method of reducing the parallel plate spacing or increasing the length thereof is generally adopted, however, reducing the parallel plate spacing causes the problems that the channels are easy to be blocked and the fluid resistance is overlarge, which is quite uneconomical; increasing the length of the flame arrester passageway not only results in excessive fluid resistance, but also results in excessive volume of the flame arrester. Accordingly, there is a need to develop an improved parallel plate flame arrestor that can improve the flame retardant performance of parallel plates without decreasing the spacing between the plates and without increasing the length.
Disclosure of Invention
Aiming at the problems of narrow application range and reduced economy caused by improvement of fire resistance performance of the parallel plate flame arrester in the prior art, the utility model provides a novel parallel plate flame arrester with a convex structure, and has the advantages of wide application range, economy, high efficiency, simple structure, convenient cleaning and easy maintenance.
In order to solve the problems, the utility model adopts the following technical scheme: a parallel plate flame arrester with a convex structure comprises a left cylinder body (1), a right cylinder body (2) and a flame arrester core (3); the left cylinder body (1) is provided with a first flange plate (4) and a second flange plate (5) at the left end and the right end, and the right cylinder body (2) is provided with a third flange plate (6) and a fourth flange plate (7) at the left end and the right end; an expansion cavity of the left cylinder body (1) is arranged between the first flange plate (4) and the left support plate (8), and an expansion cavity of the right cylinder body (2) is arranged between the fourth flange plate (7) and the right support plate (9); the cylinder body is internally provided with a fire-retarding core (3), parallel channels in the fire-retarding core (3) are formed by combining a plurality of stainless steel plates with bulges in parallel, parallel channels are formed between every two stainless steel plates, and the stainless steel plates are supported and fixed by a clamping sheet (11).
In the above technical solution, preferably, the second flange (5) and the third flange (6) are connected in a sealing manner by bolts, nuts and gaskets penetrating through the bolt holes (10).
In the above technical scheme, preferably, the expansion angles of the expansion cavity of the left cylinder (1) and the expansion cavity of the right cylinder (2) are 10-80 degrees.
In the above technical scheme, preferably, the card (11) is located on the inner wall of the left cylinder (1), the inner wall of the right cylinder (2), the left support plate (8) and the right support plate (9).
In the above technical scheme, preferably, the card (11) is composed of two flat plates, is made of stainless steel or cast steel, is used for fixing and supporting the stainless steel flat plates with protrusions, is convenient to take out and can be cleaned in a piece-by-piece manner.
In the above technical scheme, preferably, the fire-retardant core (3) is formed by combining a plurality of stainless steel flat plates with bulges, and the stainless steel flat plates are symmetrically distributed by taking the central plane of the cylinder as the symmetrical plane.
In the above technical solution, preferably, the parallel plate spacing formed by the stainless steel flat plate ranges from 0.1mm to 4mm; the ratio of the length of the bulge to the total length is 0.1-0.8; the ratio of the height of the protrusions to the space between the parallel plates is in the range of 0.1-0.8.
In the above technical scheme, preferably, the diameter of the left support plate (8) is equal to the maximum diameter of the expansion cavity of the left cylinder (1), and the left support plate is fixed at the tail end of the expansion cavity of the left cylinder (1).
In the above technical scheme, preferably, the diameter of the right supporting plate (9) is equal to the maximum diameter of the expansion cavity of the right cylinder (2), and the right supporting plate is fixed at the tail end of the expansion cavity of the right cylinder (2).
The utility model relates to a parallel plate flame arrester which can be arranged in a flammable and explosive gas pipeline or at the top of a volatile liquid storage tank, and solves the problems of narrow application range of the parallel plate flame arrester and reduced economy caused by improvement of flame-retarding performance. The utility model provides a parallel plate flame arrester with a convex structure, which is used for widening the application range of the parallel plate flame arrester and realizing the performance improvement under the conditions that the gap value of a flame arrester channel is not reduced and the length is not increased. The flame arrester has the advantages that the parallel plates are designed in a protruding way, the contact area of flame and the wall surface is larger, so that the wall surface cooling effect is more sufficient, meanwhile, the number of destroyed free radicals is more because of more collisions between the free radicals and the wall surface of the channel, the number of free radicals participating in the reaction is reduced, and the chain reaction is interrupted, so that the flame is quenched under the combined action of the cold wall effect and the wall effect. After the stainless steel flat plate is designed in a protruding way, the fire arrestor can realize the improvement of fire-arresting performance under the conditions that the gap between the flat plate is not reduced and the length is not increased, and meanwhile, the increase of the fluid resistance and the volume of the fire arrestor is avoided. The parallel plate flame arrester adopts the clamping pieces to fix the flame arrester cores, has simple structure, is formed by combining stainless steel flat plates with convex structures in pairs, has a detachable structure, can realize the cleaning of the plates in a slicing way, and prolongs the maintenance period due to more thorough cleaning. The parallel plate flame arrester has the advantages of wide application range, economy, high efficiency, simple structure, convenient cleaning and easy maintenance, and has good market application prospect. The parallel plate flame arrester is not limited in application range to a diesel engine exhaust system, can be popularized and applied to the top of a flammable and explosive gas conveying pipeline and a volatile liquid storage tank, has wider application range, can improve the flame resistance performance of a stainless steel plate under the conditions that the gap value of the flame arrester channel is not reduced and the length is not increased due to improvement of the stainless steel plate, and achieves better technical effects.
Drawings
FIG. 1 is a plan view of a parallel plate flame arrestor structure with a raised structure in accordance with the present utility model.
FIG. 2 is a cross-sectional view of a parallel plate flame arrestor with a raised structure in accordance with the utility model.
FIG. 3 is an enlarged schematic view of the arrangement of the cards on the inner walls of the left and right cylinders of a parallel plate flame arrester with a convex structure and a part of the card.
FIG. 4 is an enlarged schematic view of a support plate of a parallel plate flame arrester with a raised structure and a card on the support plate.
Wherein 1 is left barrel, 2 is right barrel, 3 is fire-retardant core, 4 is first ring flange, 5 is the second ring flange, 6 is the third ring flange, 7 is the fourth ring flange, 8 is left socle board, 9 is right socle board, 10 is the bolt hole, 11 is the card.
The present utility model is further illustrated by, but not limited to, the following examples.
Detailed Description
The utility model is a parallel plate flame arrestor with a raised structure, and the utility model is further illustrated by the examples given below.
Referring to fig. 1-4, a parallel plate flame arrester with a convex structure, which is arranged in a flammable and explosive gas conveying pipeline or at the top end of a volatile liquid storage tank, comprises a left cylinder body (1), a right cylinder body (2) and a flame arrester core (3); the left cylinder body (1) is provided with a first flange plate (4) and a second flange plate (5) at the left end and the right end, the right cylinder body (2) is provided with a third flange plate (6) and a fourth flange plate (7) at the left end and the right end, and the second flange plate (5) and the third flange plate (6) are in sealing connection through bolts, nuts and gaskets passing through bolt holes (10); an expansion cavity of the left cylinder body (1) is arranged between the first flange plate (4) and the left support plate (8), the diameter of the left support plate (8) is equal to the maximum diameter of the expansion cavity of the left cylinder body (1), and the left support plate is fixed at the tail end of the expansion cavity of the left cylinder body (1); an expansion cavity of the right cylinder body (2) is arranged between the fourth flange plate (7) and the right support plate (9), the diameter of the right support plate (9) is equal to the maximum diameter of the expansion cavity of the right cylinder body (2), and the expansion cavity is fixed at the tail end of the expansion cavity of the right cylinder body (2); the cylinder body is internally provided with a fire-retarding core (3), parallel channels in the fire-retarding core (3) are formed by combining a plurality of stainless steel plates with bulges in parallel, parallel channels are formed between every two stainless steel plates, and the stainless steel plates are supported and fixed by a clamping sheet (11). The clamping pieces (11) are positioned on the inner wall of the left cylinder body (1), the inner wall of the right cylinder body (2), the left supporting plate (8) and the right supporting plate (9). The clamping piece (11) is composed of two flat plates, is made of stainless steel or cast steel, and is used for fixing and supporting the stainless steel flat plates with protrusions, and the stainless steel flat plates are convenient to take out and can be cleaned in a slicing mode.
Example 1
A parallel plate flame arrester with a convex structure is arranged in a flammable and explosive gas conveying pipeline, wherein the flammable and explosive gas is hydrogen, methane, ethane, propane and the like. The device comprises: an inlet of the flammable and explosive gas conveying pipeline, a parallel plate flame arrester with a convex structure and an outlet of the flammable and explosive gas conveying pipeline.
The expansion angles of the expansion cavities of the left cylinder body (1) and the right cylinder body (2) are all 80 degrees; the fire-retardant core (3) is formed by combining a plurality of stainless steel flat plates with bulges, the stainless steel flat plates are symmetrically distributed by taking the central plane of the cylinder as the symmetrical plane, and the spacing range of parallel plates formed by the stainless steel flat plates is 0.1mm; the ratio of the length of the bulge to the total length is 0.1; the ratio of the height of the protrusions to the pitch of the parallel plates is in the range of 0.1.
The inlet of the flammable and explosive gas conveying pipeline is connected with the flame arrester through the first flange plate (4), detonation flame is converted into deflagration flame from the detonation flame through the inlet of the flammable and explosive gas conveying pipeline and enters the left cylinder body (1) through the first flange plate (4) and is buffered through the expansion cavity, and the flame speed is greatly reduced. The deflagration flame enters a parallel plate narrow channel of the fire-retarding core (3) through the left supporting plate (8), the temperature of the flame is reduced due to the wall cooling and the wall action, free radicals participating in the reaction are reduced, after entering the convex structure, heat is more dissipated due to larger contact area with the wall, meanwhile, the free radicals are further reduced, the temperature of the combustible gas is reduced below the ignition point, and the chain reaction is interrupted, so that the flame is quenched. The combustion products enter the outlet of the flammable and explosive gas conveying pipeline connected with the fourth flange plate (7) through the right supporting plate (9), and the flame is quenched in the flame arrester and does not continue to propagate in the pipeline, so that the safety of the whole pipeline is protected. The existence of the bulge on the stainless steel flat plate enables the contact area between the flame and the wall surface to be larger, so that the wall surface cooling effect is more sufficient, meanwhile, the number of destroyed free radicals is more because of more collision between the free radicals and the wall surface of the channel, the number of free radicals participating in the reaction is reduced, and the chain reaction is interrupted, so that the flame is quenched under the combined action of the cold wall effect and the wall effect. After the stainless steel flat plate is designed in a protruding way, the fire arrestor can realize the great improvement of fire-retarding performance under the conditions that the gap between the flat plate is not reduced and the length is not increased, and meanwhile, the increase of the fluid resistance and the volume of the fire arrestor is avoided.
Example two
A parallel plate flame arrester with a convex structure is arranged on a top emptying pipeline of a storage tank for storing volatile liquid, wherein the volatile liquid is oil products (gasoline, diesel oil, dirty oil, naphtha, solvent oil and crude oil), organic aldehydes (including formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde and the like) and the like. The device comprises: inflammable and explosive gas conveying pipeline, parallel plate flame arrester with raised structure and top end emptying pipeline of volatile liquid storage tank.
The expansion angles of the expansion cavities of the left cylinder body (1) and the right cylinder body (2) are 10 degrees; the fire-retardant core (3) is formed by combining a plurality of stainless steel flat plates with bulges, the stainless steel flat plates are symmetrically distributed by taking the central plane of the cylinder as the symmetrical plane, and the spacing range of parallel plates formed by the stainless steel flat plates is 4mm; the ratio of the length of the bulge to the total length is 0.8; the ratio of the height of the protrusions to the pitch of the parallel plates is in the range of 0.8.
The flammable and explosive gas conveying pipeline is connected with the flame arrester through the first flange plate (4), detonation flame enters the left cylinder body (1) from the flammable and explosive gas conveying pipeline through the flange, and is buffered through the expansion cavity, so that the flame speed is greatly reduced, and the detonation flame is converted into deflagration flame. The deflagration flame enters the parallel plate channel of the fire-retardant core (3) through the left support plate (8), the temperature of the flame is reduced due to the wall cooling and the wall action, free radicals participating in the reaction are reduced, after entering the convex structure, heat is more dissipated due to larger contact area with the wall, meanwhile, the free radicals are further reduced, the temperature of the combustible gas is reduced below the ignition point, and the chain reaction is interrupted, so that the flame is quenched. The combustion products enter a storage tank top emptying pipeline connected with a fourth flange plate (7) through a right support plate (9), and the flame is quenched in the flame arrester and cannot ignite and volatilize the gas stored at the top of the storage tank, so that the explosion of the combustible gas in the storage tank is avoided, and the safety of the storage tank and a tank area is protected. The existence of the bulge on the stainless steel flat plate enables the contact area between the flame and the wall surface to be larger, so that the wall surface cooling effect is more sufficient, meanwhile, the number of destroyed free radicals is more because of more collision between the free radicals and the wall surface of the channel, the number of free radicals participating in the reaction is reduced, and the chain reaction is interrupted, so that the flame is quenched under the combined action of the cold wall effect and the wall effect. After the stainless steel flat plate is designed in a protruding way, the fire arrestor can realize the great improvement of fire-retarding performance under the conditions that the gap between the flat plate is not reduced and the length is not increased, and meanwhile, the increase of the fluid resistance and the volume of the fire arrestor is avoided.
Example III
According to the condition of the first embodiment, the expansion angles of the expansion cavity of the left cylinder body (1) and the expansion cavity of the right cylinder body (2) are 60 degrees; the fire-retardant core (3) is formed by combining a plurality of stainless steel flat plates with bulges, the stainless steel flat plates are symmetrically distributed by taking the central plane of the cylinder as the symmetrical plane, and the spacing range of parallel plates formed by the stainless steel flat plates is 0.5mm; the ratio of the length of the bulge to the total length is 0.5; the ratio of the height of the protrusions to the pitch of the parallel plates is in the range of 0.5.
The inlet of the flammable and explosive gas conveying pipeline is connected with the flame arrester through the first flange plate (4), detonation flame is converted into deflagration flame from the detonation flame through the inlet of the flammable and explosive gas conveying pipeline and enters the left cylinder body (1) through the first flange plate (4) and is buffered through the expansion cavity, and the flame speed is greatly reduced. The deflagration flame enters a parallel plate narrow channel of the fire-retarding core (3) through the left supporting plate (8), the temperature of the flame is reduced due to the wall cooling and the wall action, free radicals participating in the reaction are reduced, after entering the convex structure, heat is more dissipated due to larger contact area with the wall, meanwhile, the free radicals are further reduced, the temperature of the combustible gas is reduced below the ignition point, and the chain reaction is interrupted, so that the flame is quenched. The combustion products enter the outlet of the flammable and explosive gas conveying pipeline connected with the fourth flange plate (7) through the right supporting plate (9), and the flame is quenched in the flame arrester and does not continue to propagate in the pipeline, so that the safety of the whole pipeline is protected. The existence of the bulge on the stainless steel flat plate enables the contact area between the flame and the wall surface to be larger, so that the wall surface cooling effect is more sufficient, meanwhile, the number of destroyed free radicals is more because of more collision between the free radicals and the wall surface of the channel, the number of free radicals participating in the reaction is reduced, and the chain reaction is interrupted, so that the flame is quenched under the combined action of the cold wall effect and the wall effect. After the stainless steel flat plate is designed in a protruding way, the fire arrestor can realize the great improvement of fire-retarding performance under the conditions that the gap between the flat plate is not reduced and the length is not increased, and meanwhile, the increase of the fluid resistance and the volume of the fire arrestor is avoided.
Example IV
According to the condition of the first embodiment, the expansion angles of the expansion cavity of the left cylinder body (1) and the expansion cavity of the right cylinder body (2) are 30 degrees; the fire-retardant core (3) is formed by combining a plurality of stainless steel flat plates with bulges, the stainless steel flat plates are symmetrically distributed by taking the central plane of the cylinder as the symmetrical plane, and the spacing range of parallel plates formed by the stainless steel flat plates is 2mm; the ratio of the length of the bulge to the total length is 0.3; the ratio of the height of the protrusions to the pitch of the parallel plates is in the range of 0.3.
The inlet of the flammable and explosive gas conveying pipeline is connected with the flame arrester through the first flange plate (4), detonation flame is converted into deflagration flame from the detonation flame through the inlet of the flammable and explosive gas conveying pipeline and enters the left cylinder body (1) through the first flange plate (4) and is buffered through the expansion cavity, and the flame speed is greatly reduced. The deflagration flame enters a parallel plate narrow channel of the fire-retarding core (3) through the left supporting plate (8), the temperature of the flame is reduced due to the wall cooling and the wall action, free radicals participating in the reaction are reduced, after entering the convex structure, heat is more dissipated due to larger contact area with the wall, meanwhile, the free radicals are further reduced, the temperature of the combustible gas is reduced below the ignition point, and the chain reaction is interrupted, so that the flame is quenched. The combustion products enter the outlet of the flammable and explosive gas conveying pipeline connected with the fourth flange plate (7) through the right supporting plate (9), and the flame is quenched in the flame arrester and does not continue to propagate in the pipeline, so that the safety of the whole pipeline is protected. The existence of the bulge on the stainless steel flat plate enables the contact area between the flame and the wall surface to be larger, so that the wall surface cooling effect is more sufficient, meanwhile, the number of destroyed free radicals is more because of more collision between the free radicals and the wall surface of the channel, the number of free radicals participating in the reaction is reduced, and the chain reaction is interrupted, so that the flame is quenched under the combined action of the cold wall effect and the wall effect. After the stainless steel flat plate is designed in a protruding way, the fire arrestor can realize the great improvement of fire-retarding performance under the conditions that the gap between the flat plate is not reduced and the length is not increased, and meanwhile, the increase of the fluid resistance and the volume of the fire arrestor is avoided.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily appreciate variations or alternatives within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Comparative example one
A parallel plate flame arrester without a protruding structure is arranged in a flammable and explosive gas conveying pipeline, wherein the flammable and explosive gas is hydrogen, methane, ethane, propane and the like. The device comprises: an inlet of the flammable and explosive gas conveying pipeline, a parallel plate flame arrester with a convex structure and an outlet of the flammable and explosive gas conveying pipeline.
The expansion angles of the expansion cavities of the left cylinder body (1) and the right cylinder body (2) are 30 degrees; the fire-retardant core (3) is formed by combining a plurality of stainless steel flat plates with bulges, the stainless steel flat plates are symmetrically distributed by taking the central plane of the cylinder as the symmetrical plane, and the interval range of parallel plates formed by the stainless steel flat plates is 2mm.
The inlet of the flammable and explosive gas conveying pipeline is connected with the flame arrester through the first flange plate (4), detonation flame is converted into deflagration flame from the detonation flame through the inlet of the flammable and explosive gas conveying pipeline and enters the left cylinder body (1) through the first flange plate (4) and is buffered through the expansion cavity, and the flame speed is greatly reduced. The deflagration flame enters a parallel plate narrow channel of the fire-retardant core (3) through the left support plate (8), the temperature of the flame is reduced due to the wall cooling and the wall action, and free radicals participating in the reaction are reduced, but the temperature reduction and the free radical reduction are limited due to the non-convex structure, so that the temperature of the combustible gas can not be successfully reduced below the ignition point, the chain reaction is not interrupted, and the flame can not be quenched. The flame passes through the right support plate (9), enters the outlet of the inflammable and explosive gas conveying pipeline connected with the fourth flange plate (7), continues to spread in the pipeline, and spreads to the whole pipeline, so that fire accidents are caused.
Obviously, the parallel plate flame arrester of the utility model adopts the clamping piece to fix the flame arrester core, the flame arrester core has simple structure, is formed by combining stainless steel flat plates with convex structures in pairs, has a detachable structure, can realize the slicing cleaning, and prolongs the maintenance period because the cleaning is more thorough. The parallel plate flame arrester has the advantages of wide application range, economy, high efficiency, simple structure, convenient cleaning and easy maintenance, and has good market application prospect. The parallel plate flame arrester is not limited in application range to a diesel engine exhaust system, can be popularized and applied to the top of a flammable and explosive gas conveying pipeline and a volatile liquid storage tank, has wider application range, can improve the flame resistance performance of a stainless steel plate under the conditions that the gap value of the flame arrester channel is not reduced and the length is not increased due to improvement of the stainless steel plate, and achieves better technical effects.
Claims (7)
1. A parallel plate flame arrester with a convex structure comprises a left cylinder body (1), a right cylinder body (2) and a flame arrester core (3); the left cylinder body (1) is provided with a first flange plate (4) and a second flange plate (5) at the left end and the right end, and the right cylinder body (2) is provided with a third flange plate (6) and a fourth flange plate (7) at the left end and the right end; an expansion cavity of the left cylinder body (1) is arranged between the first flange plate (4) and the left support plate (8), and an expansion cavity of the right cylinder body (2) is arranged between the fourth flange plate (7) and the right support plate (9); the cylinder body is internally provided with a fire-retarding core (3), parallel channels in the fire-retarding core (3) are formed by combining a plurality of stainless steel flat plates with bulges in parallel, the stainless steel flat plates are symmetrically distributed by taking the central plane of the cylinder body as the symmetrical plane, parallel channels are formed between every two stainless steel flat plates, and the interval range of parallel plates formed by the stainless steel flat plates is 0.1-4mm; the ratio of the length of the bulge to the total length is 0.1-0.8; the ratio of the height of the protrusions to the spacing of the parallel plates is 0.1-0.8, the stainless steel flat plates are supported and fixed by the clamping plates (11), and the clamping plates (11) are formed by two flat plates.
2. Parallel plate flame arrester with protruding structure according to claim 1, characterized in that the second flange (5) and the third flange (6) are sealingly connected through bolt holes (10) by bolts, nuts, gaskets.
3. The parallel plate flame arrester with the convex structure according to claim 1, wherein the expansion angles of the expansion cavities of the left cylinder (1) and the right cylinder (2) are 10-80 degrees.
4. The parallel plate flame arrester with the convex structure according to claim 1, characterized in that the clamping piece (11) is positioned on the inner wall of the left cylinder (1), the inner wall of the right cylinder (2), the left supporting plate (8) and the right supporting plate (9).
5. The parallel plate flame arrester with the convex structure according to claim 1, characterized in that the card (11) is made of stainless steel or cast steel and is used for fixing and supporting a stainless steel flat plate with the convex, and the stainless steel flat plate is convenient to take out and can be cleaned in a piece-by-piece manner.
6. The parallel plate flame arrester with the convex structure according to claim 1, wherein the diameter of the left supporting plate (8) is equal to the largest diameter of the expansion cavity of the left cylinder (1), and the left supporting plate is fixed at the tail end of the expansion cavity of the left cylinder (1).
7. The parallel plate flame arrester with the convex structure according to claim 1, wherein the diameter of the right supporting plate (9) is equal to the largest diameter of the expansion cavity of the right barrel (2), and the right supporting plate is fixed at the tail end of the expansion cavity of the right barrel (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019214.1A CN110013627B (en) | 2018-01-09 | 2018-01-09 | Parallel plate flame arrester with protruding structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810019214.1A CN110013627B (en) | 2018-01-09 | 2018-01-09 | Parallel plate flame arrester with protruding structure |
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| CN110013627A CN110013627A (en) | 2019-07-16 |
| CN110013627B true CN110013627B (en) | 2024-02-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111298333A (en) * | 2020-02-18 | 2020-06-19 | 常州工学院 | Plate-type flame arrester with micro-channel periodically contracted and expanded |
| CN111282176A (en) * | 2020-02-18 | 2020-06-16 | 常州工学院 | Plate-type flame arrester with wavy micro-channel |
| CN113813529A (en) * | 2020-06-18 | 2021-12-21 | 中国石油化工股份有限公司 | Flame arrester with fire retardant plate |
| CN113797464B (en) * | 2021-09-09 | 2022-04-08 | 中国矿业大学 | Flame arrester based on Tesla valve structure |
| CN115105773B (en) * | 2022-07-04 | 2023-06-27 | 合肥工业大学智能制造技术研究院 | A pole bundle hinders and explodes device for hydrogen pipeline |
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| CN110013627A (en) | 2019-07-16 |
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