CN114602560A - Distribution system - Google Patents
Distribution system Download PDFInfo
- Publication number
- CN114602560A CN114602560A CN202210291387.5A CN202210291387A CN114602560A CN 114602560 A CN114602560 A CN 114602560A CN 202210291387 A CN202210291387 A CN 202210291387A CN 114602560 A CN114602560 A CN 114602560A
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- China
- Prior art keywords
- pipe
- branch
- distribution system
- branch pipes
- hexagonal
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- 238000009826 distribution Methods 0.000 title claims abstract description 70
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 19
- 238000004873 anchoring Methods 0.000 claims abstract description 4
- 241000270708 Testudinidae Species 0.000 claims abstract description 3
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 238000004523 catalytic cracking Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 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
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a distribution system. The distribution system comprises branch pipes, nozzles, branch pipes, a tortoise shell net and a lining; the branched pipe is a hexagonal pipe and is formed by welding six steel plates, and the nozzles are drilled and welded on two sides of the lower bottom surface of the hexagonal pipe and are staggered according to the required spacing of nozzle arrangement; the branch pipe can be a round pipe, a rectangular pipe or a hexagonal pipe, and nozzles are arranged at the bottom of the branch pipe according to the required spacing of the nozzle arrangement for uniform medium distribution; the hexagonal pipe branch pipes are welded to the branch pipes at required intervals, a tortoise-shell net or an anchoring nail is welded to the outer surfaces of the branch pipes and then coated with a high-wear-resistant lining, the flow area of a medium outside a distribution system can be increased through the hexagonal pipe branch pipes and the branch pipes, the pressure drop of the medium through the distribution system is reduced, and the wear of the high-wear-resistant lining on the outer surface of the distribution system is reduced.
Description
Technical Field
The invention belongs to the field of petroleum processing, and relates to a gas mixing distribution system for a reactor, in particular to a distribution system.
Background
At present, in a catalytic cracking device of petrochemical industry, media of a plurality of reactors, regenerators and containers need to be uniformly distributed, the media need to be distributed more uniformly through a media distribution system, and the branch-shaped distribution system is a common distribution system type.
The existing branch distribution system mainly comprises a circular branch pipe and a circular branch pipe.
The branch pipe applied to the petrochemical industry is formed by processing a round seamless steel pipe, nozzles are welded on the branch pipe according to a certain distance, but the longitudinal cutting area and the transverse cutting area of the seamless steel pipe with a certain length are fixed, and the larger the flow area in the branch pipe is when the total amount of a medium is fixed, the more the nozzles can be arranged. If the diameter of the branched pipe seamless steel pipe is increased, the ratio of the whole distribution system to the cross-sectional area of the equipment is higher, the flow area in the pipe is increased, but the medium passing area outside the pipe is reduced, so that the pressure drop of the medium passing through the distribution system is large, the medium outside the distribution system passes through the distribution system at high flow speed to cause serious abrasion of a high-wear-resistant lining on the surface of the distribution system, the energy consumption and the normal operation of the device are directly influenced, and the production stop repair is needed in serious cases.
Patent CN202023081011.7 provides a main air distributing pipe for catalytic cracking unit regenerator, is provided with the branch pipe on main air pipe, branch pipe, bleeder and the nozzle main air pipe, and four branch pipes evenly set up along the main air pipe, and the left and right sides symmetry of branch pipe is provided with the bleeder, and the left and right sides of bleeder evenly is provided with a plurality of nozzles. However, the scheme can only realize that the nozzles are uniformly distributed along the bed layer, and because the areas of the branch pipes and the branch pipes cannot be accurately adjusted, the flow through all the nozzles can not be basically kept the same, and the uniform distribution of media along the bed layer can not be realized actually, the medium throughput of some nozzles is large, the medium throughput of some nozzles is small, and even external media can return to the interior of the branch pipes through the nozzles to block the branch pipes; although the connecting plates are arranged between the branch pipes on each side of the branch pipes, the circular branch pipes and the branch pipes have limited ability to resist vibration in the medium flow due to the bending resistance and rigidity limitations of the circular branch pipes and the branch pipes, and the steel distribution pipes are worn through by the catalyst quickly after the surface lining is broken off by vibration. If the diameter of the dense phase of the distribution pipe is small, and the air flow is large, the distribution pipe occupies a large dense phase area, and the medium passes through the distribution pipe at a high speed, so that the pressure drop of a bed layer is large, the distribution pipe is seriously abraded, the distribution pipe is seriously vibrated, the long-period stable operation of the device is difficult to realize, and even the device cannot operate.
Disclosure of Invention
The invention provides a distribution system, aiming at solving the problems that the medium is not uniformly distributed through the distribution system, the pressure drop of the medium through the distribution system is large, the flow velocity of the medium outside the distribution system through the distribution system is high, so that the wear of a high-wear-resistant lining on the surface of the distribution system is serious, the bending resistance and the rigidity of a branch pipe are insufficient, the branch pipe is easy to vibrate and damage, and the like.
The invention provides a distribution system, which comprises branch pipes, nozzles, branch pipes, a tortoise shell net and a lining; the branched pipe is a hexagonal pipe and is formed by welding six steel plates, and the nozzles are drilled and welded on two sides of the lower bottom surface of the hexagonal pipe and are staggered according to the required spacing of nozzle arrangement; the branch pipe can be a round pipe, a rectangular pipe or a hexagonal pipe, and nozzles are arranged at the bottom of the branch pipe according to the required spacing of the nozzle arrangement for uniform medium distribution; and welding the hexagonal pipe branch pipes to the branch pipes at required intervals, welding a tortoise-shell net or anchoring nails on the outer surfaces of the branch pipes and the outer surfaces of the branch pipes, and then coating a high-wear-resistant lining to prevent the medium from quickly wearing the distribution system.
As an improved scheme, the branch pipes of the hexagonal pipe are formed by welding six steel plates.
As a further improved scheme, the branch pipe of the hexagonal pipe is formed by punching two steel plates and then butt-welding the two steel plates.
As a further improved scheme, the branch pipe is a round pipe formed by rolling a steel plate.
As a further improvement, the branch pipe is a rectangular pipe formed by welding steel plates, and the ratio of the length to the width of the rectangular pipe is not more than 2.5.
As a further improved scheme, the branch pipe is a hexagonal pipe which is formed by rolling, welding and extruding a steel plate.
As a further improved scheme, the distribution system further comprises a main pipe, a connecting plate is arranged between the branch pipes, a supporting pipe is arranged below each branch pipe, the tail ends of the branch pipes are communicated with the main pipe, the branch pipes can be supported, more media can be conveyed to the tail ends of the branch pipes, and the branch pipes can better play a role in preventing the distribution pipes from vibrating after being reinforced by the supporting pipes.
The invention is applied to process equipment of various devices including but not limited to petrochemical industry catalytic cracking, coal chemical industry methanol-to-olefin and the like for medium distribution.
The working principle of the distribution system provided by the invention is as follows:
the medium is uniformly distributed through the main pipe, the branch pipe and the nozzle and then uniformly contacts with the catalyst in the bed layer, so that the requirements of medium reaction or catalyst regeneration and the like are met. The distribution pipe branch pipe, the branch pipe and the nozzle are all arranged to realize the uniform distribution of the medium in the distribution system, so that the process production requirement is better realized.
The invention has the following beneficial effects:
1) by adopting the six-side pipe branch pipe and the branch pipe, the cross section area of the branch pipe can be adjusted by changing the height of the vertical plate, so that the flow area in the branch pipe can be adjusted, the medium flow of a single nozzle of the six-side pipe branch pipe can be adjusted to be approximately consistent, and the medium distribution of a distribution system is more uniform;
2) by adopting the six-side pipe branch pipe and the branch pipe, the flow area of the medium outside the distribution system through the distribution system can be increased, the pressure drop of the medium through the distribution system is reduced, and the wear of the high-wear-resistant lining on the outer surface of the distribution system is reduced;
3) the branch pipe is changed into a square shape, the branch pipes are changed into hexagonal pipes, the bending resistance and rigidity of the branch pipes and the branch pipes can be improved, the vibration amplitude of the branch pipes is reduced, the lining is prevented from cracking and falling off, the service life of a distribution system is prolonged, and the effect is better by arranging the connecting plates between the branch pipes.
4) The supporting pipe is arranged below each branch pipe, so that the main pipe is communicated with the tail end of each branch pipe, the branch pipes can be supported, more media can be conveyed to the tail ends of the branch pipes, the branch pipes can better prevent the vibration of the distribution pipes after being reinforced by the supporting pipes, and the service life of the distribution system is further prolonged.
Drawings
FIG. 1 is a schematic diagram of a distribution system according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is a schematic view of the long pipe structure in fig. 3.
In the figure: 1-branch pipe, 2-nozzle, 3-branch pipe, 4-tortoise shell net, 5-lining, 6-support pipe, 7-connecting plate and 8-main pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in FIGS. 1 to 4, the distribution system comprises a branch pipe 1, a nozzle 2, a branch pipe 3, a tortoise-shell net 4 and a lining 5; the branch pipe 1 is a hexagonal pipe, the hexagonal pipe branch pipe is formed by welding six steel plates, and the nozzles are drilled and welded on two sides of the lower bottom surface of the hexagonal pipe branch pipe in a staggered mode according to the distance required by nozzle arrangement; the branch pipe 3 can be a round pipe, a rectangular pipe or a hexagonal pipe, and nozzles are arranged at the bottom of the branch pipe according to the distance required by the arrangement of the nozzles for uniform medium distribution; and welding the hexagonal pipe branch pipes to the branch pipes at required intervals, welding a tortoise-shell net or anchoring nails on the outer surfaces of the branch pipes and the outer surfaces of the branch pipes, and then coating a high-wear-resistant lining to prevent the medium from quickly wearing the distribution system.
The hexagonal pipe branch pipe can be formed by extruding a seamless steel pipe or formed by rolling, welding and forming a steel plate; the branch pipe can be a round pipe formed by rolling a steel plate or a rectangular pipe or a hexagonal pipe welded by the steel plate; set up connecting plate 7 between the bleeder, set up stay tube 6 under every branch pipe, make and be responsible for 8 and the terminal UNICOM of branch pipe 3, can play the support branch pipe and carry more media to the branch pipe end, branch pipe can be better after the stay tube reinforcement prevent the effect of distribution pipe vibration.
The flow area inside the branch pipe of the hexagonal pipe is increased, so that the number of arranged nozzles is increased; under the condition of guaranteeing that flow area in the lateral pipe is the same with seamless steel pipe, multiplicable distribution system outer medium passes through distribution system flow area, the medium passes through distribution system pressure drop reduction and distribution system exterior high wear-resisting lining wearing and tearing reduce, increase the bending resistance and the rigidity of lateral pipe, it can make the effect better to set up the connecting plate between the cooperation lateral pipe, reduce lateral pipe vibration amplitude, it splits and drops to reduce the lining, set up stay tube 6 under every branch pipe, make and be responsible for 8 and 3 terminal UNICOM of branch pipe, can play support branch pipe 3 and to 3 terminal more mediums of branch pipe, branch pipe 3 can be better prevent distribution pipe vibration effect after the stay tube reinforcement, thereby make distribution system life increase, reduce the number of times of parking and maintenance, make the long period steady operation of device.
The foregoing is illustrative of the present invention and is not to be construed as limiting thereof in any way. Any person skilled in the art, having the benefit of the present disclosure, will recognize equivalent examples of changes and modifications as may be made without departing from the scope of the invention. Any equivalent changes made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention, unless departing from the content of the technical solution of the present invention.
Claims (6)
1. A distribution system, characterized by: the distribution system comprises branch pipes, nozzles, branch pipes, a tortoise shell net and a lining; the branched pipe is a hexagonal pipe and is formed by welding six steel plates, and the nozzles are welded on two sides of the lower bottom surface of the hexagonal pipe and staggered according to the required spacing for nozzle arrangement; the branch pipe is a circular pipe, a rectangular pipe or a hexagonal pipe, and nozzles are arranged at the bottom of the branch pipe according to the required spacing of nozzle arrangement; and welding the hexagonal pipe branch pipes to the branch pipes at required intervals, welding a tortoise-shell net or anchoring nails on the outer surfaces of the branch pipes and the outer surfaces of the branch pipes, and then coating a high-wear-resistant lining to prevent the medium from quickly wearing the distribution system.
2. The distribution system of claim 1, wherein: the branch pipe of the hexagonal pipe is formed by welding six steel plates.
3. The distribution system of claim 1, wherein: the branch pipe of the hexagonal pipe is formed by punching two steel plates and then butt-welding the two steel plates.
4. The distribution system of claim 1, wherein: the branch pipe is a rectangular pipe formed by welding steel plates, and the ratio of the length to the width of the branch pipe is not more than 2.5.
5. The distribution system of claim 1, wherein: the branch pipe is a hexagonal pipe which is formed by rolling, welding and extruding a steel plate.
6. The distribution system of claim 1, wherein: the distribution system further comprises a main pipe, a connecting plate is arranged between the branch pipes, a supporting pipe is arranged under each branch pipe, the main pipe is communicated with the tail ends of the branch pipes, the branch pipes can be supported, more media can be conveyed to the tail ends of the branch pipes, and the vibration of the distribution pipes can be better prevented by the branch pipes after the branch pipes are reinforced by the supporting pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210291387.5A CN114602560A (en) | 2022-03-23 | 2022-03-23 | Distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210291387.5A CN114602560A (en) | 2022-03-23 | 2022-03-23 | Distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114602560A true CN114602560A (en) | 2022-06-10 |
Family
ID=81865811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210291387.5A Pending CN114602560A (en) | 2022-03-23 | 2022-03-23 | Distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114602560A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040045610A1 (en) * | 1995-07-18 | 2004-03-11 | Franz-Josef Carduck | Liquid distributor |
| CN201337876Y (en) * | 2008-12-19 | 2009-11-04 | 宁波金远东工业科技有限公司 | Gas-liquid distributor |
| CN104226208A (en) * | 2013-06-06 | 2014-12-24 | 神华集团有限责任公司 | Gas distributor for multiphase flow reactor and multiphase flow reactor |
| CN204159239U (en) * | 2014-10-20 | 2015-02-18 | 吴江市万事达环保溶剂有限公司 | A kind of novel gas-liquid mixing arrangement |
| CN104857896A (en) * | 2015-06-05 | 2015-08-26 | 常州瑞华化工工程技术有限公司 | Gas phase distributor for fixed bed reactor |
| CN106311095A (en) * | 2015-07-06 | 2017-01-11 | 刘英聚 | Fluidized bed gas distribution improvement method and distributor |
| US20200368707A1 (en) * | 2017-11-14 | 2020-11-26 | China Petroleum & Chemical Corporation | Fluid distributor, reaction device and application thereof |
| CN213977552U (en) * | 2020-12-21 | 2021-08-17 | 江苏美德核能设备有限公司 | Main air distribution pipe for regenerator of catalytic cracking unit |
-
2022
- 2022-03-23 CN CN202210291387.5A patent/CN114602560A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040045610A1 (en) * | 1995-07-18 | 2004-03-11 | Franz-Josef Carduck | Liquid distributor |
| CN201337876Y (en) * | 2008-12-19 | 2009-11-04 | 宁波金远东工业科技有限公司 | Gas-liquid distributor |
| CN104226208A (en) * | 2013-06-06 | 2014-12-24 | 神华集团有限责任公司 | Gas distributor for multiphase flow reactor and multiphase flow reactor |
| CN204159239U (en) * | 2014-10-20 | 2015-02-18 | 吴江市万事达环保溶剂有限公司 | A kind of novel gas-liquid mixing arrangement |
| CN104857896A (en) * | 2015-06-05 | 2015-08-26 | 常州瑞华化工工程技术有限公司 | Gas phase distributor for fixed bed reactor |
| CN106311095A (en) * | 2015-07-06 | 2017-01-11 | 刘英聚 | Fluidized bed gas distribution improvement method and distributor |
| US20200368707A1 (en) * | 2017-11-14 | 2020-11-26 | China Petroleum & Chemical Corporation | Fluid distributor, reaction device and application thereof |
| CN213977552U (en) * | 2020-12-21 | 2021-08-17 | 江苏美德核能设备有限公司 | Main air distribution pipe for regenerator of catalytic cracking unit |
Non-Patent Citations (1)
| Title |
|---|
| 于恩林、韩毅: "《钎钢成形技术理论及数值分析》", vol. 1, 东北大学出版社, pages: 371 - 372 * |
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| PB01 | Publication | ||
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Application publication date: 20220610 |