CN203507981U - Inlet gas distributor of fixed bed reactor - Google Patents
Inlet gas distributor of fixed bed reactor Download PDFInfo
- Publication number
- CN203507981U CN203507981U CN201320678751.XU CN201320678751U CN203507981U CN 203507981 U CN203507981 U CN 203507981U CN 201320678751 U CN201320678751 U CN 201320678751U CN 203507981 U CN203507981 U CN 203507981U
- Authority
- CN
- China
- Prior art keywords
- inlet gas
- gas distributor
- bottom plate
- fixed bed
- perforate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003054 catalyst Substances 0.000 abstract description 7
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 47
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Landscapes
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The utility model relates to an inlet gas distributor of a fixed bed reactor. The inlet gas distributor is characterized in that a round base plate with holes is arranged at the bottom of the inlet gas distributor, and a cone-shaped cylinder body with side holes is arranged at the upper part of the round base plate; the side holes of the cone-shaped cylinder body are axial long round holes which are formed in the lower part of the cone-shaped cylinder body and close to the round base plate; a semi-vertical angle of the cone-shaped cylinder body ranges from 2 degrees to 3 degrees, and the sum of the areas of side holes of the cone-shaped cylinder body and the holes of the base plate is equal to 3-4 times of the flow area of a feeding pipe of the fixed bed reactor. According to the inlet gas distributor, by utilizing a simple tapered bucket-shaped hole type structure, the air flow distribution is uniform, the current bias is prevented, dead zone and short circuit phenomena of a catalyst bed layer are avoided, and the high reverse kinetic energy formed after inlet gas collides with the round base plate at the bottom of the distributor is greatly reduced, so that the erosion caused by the air current to the wall of the fixed bed reactor is alleviated.
Description
Technical field
The utility model relates to the fixed bed reactors field of fuel feeding and chemical plant installations, particularly relates to a kind of inlet gas distributor of fixed bed reactors.
Background technology
In domestic a large amount of oil refining and chemical plant installations, all there are a large amount of fixed bed reactors, as the normal reactors such as hydrogenation, desulfurization, hypermutation, middle change and low change that are equipped with in synthetic ammonia, methyl alcohol and device for producing hydrogen.As the nucleus equipment of related device, the working environment of fixed bed reactors normally high temperature, high pressure, face hydrogen and high temperature sulphur and hydrogen-sulfide environmental.In the course of the work, reaction gas enters reactor from top, after inlet gas distributor, enters beds and completes reaction, then collect and discharge through outlet gas collector.The contour structures of typical fixed bed reactors as shown in Figure 1.
At present, what the inlet gas distributor of domestic fixed bed reactors generally adopted is the board-like inlet gas distributor of dish, and its structure as shown in Figure 2.The bottom of this inlet gas distributor is that circular baffle plate 8(is without perforate), top is multi-layer annular dividing plate 9, between toroidal membrane 9, with four ribs plate, connect, gas spreads towards periphery from toroidal membrane 9 middle spaces from top to bottom, through wall of reactor baffling, then distribute downwards, enter beds 7 and react, its operation principle as shown in Figure 3, is easily known and is had following deficiency:
1, gas is regular umbrella and flows, the mobile gas bundle 6 of air-flow for distributing by strand shape, and skewness in reactor, is prone to bias current and short circuit phenomenon, thereby can form catalyst dead band 10, as shown in Figure 3.
2, mechanical strength is less, under the impact of entrance high velocity air, can produce the vibration of certain frequency, and long period of operation easily causes the fatigue rupture of structure of distributor part.The wherein damage of any dish plate distortion, the larger fluctuation that all can cause inlet air flow to distribute, causes the area in catalyst dead band 10 to increase.
3, this inlet gas distributor is by adjusting size, the quantity of toroidal membrane 9 and the spacing between toroidal membrane 9 of toroidal membrane 9 interior diameters, adjusting gas flow area on distributor.Utilize the geometric gap of toroidal membrane, after reacting gas shunting, utilize the wall blowback flow-disturbing of reactor end socket, enter beds 10 and react.When reactor designs, will consider that this distribution mode shortens the service life of reactor to the erosion meeting of end socket, thereby make Percussion counter-force become one of principal element that reactor failure must consider.
Therefore, the deficiency existing for the board-like inlet gas distributor of dish that in domestic current petrochemical plant, fixed bed reactors generally adopt, the utility model improves the structure of inlet gas distributor, make distribution of gas more even, prevent bias current and short circuit, reduce fluid dead band, the utilization rate that improves catalyst is necessary.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of inlet gas distributor of fixed bed reactors, the limitation problem existing for solving existing inlet gas distributor.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of inlet gas distributor of fixed bed reactors, and its bottom adopts circular bottom plate with holes, and circular bottom plate top is the conical shell of side direction perforate.
The beneficial effects of the utility model are: compare with the board-like gas distributor of dish, taper tubbiness perforating of the present utility model is simple in structure, and mechanical strength is good.By the perforate of conical shell and circular bottom plate, at the rotation flow-disturbing of side and bottom surface formation gas, inlet air flow becomes pencil shape from the distribution of thigh shape and distributes, air-flow is more evenly distributed, prevent bias current, avoid beds to occur dead band and short circuit, improve the utilization rate of catalyst.Simultaneously, greatly reduced the circular bottom plate collision rear formation larger reverse kinetic energy of inlet gas to distributor bottom, its impulsive force diffusion track on because of constantly being decayed by disturbance, thereby alleviate the erosion of air-flow to fixed bed reactors wall, raising fixed bed reactors service life.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, the perforate in described circular bottom plate is circular port, and each circular port is pressed equilateral triangle or square is evenly distributed.
Further, the diameter of the perforate in described circular bottom plate is more than or equal to 8 millimeters, and the spacing between each perforate is more than or equal to 20 millimeters.
Adopt the beneficial effect of above-mentioned further scheme to be: to make perforate in circular bottom plate meet the requirement of reactor stringing localized area, and provided the dimensional requirement of perforate, both met certain percent opening, circular bottom plate be can take into account again and the rigidity needs of gas shock and the restriction of processing technology level resisted, distribution of gas is more even, air-flow weakens the erosion of fixed bed reactors wall, has improved the service life of fixed bed reactors.
Further, the side direction perforate of described conical shell is axial slotted hole.
Adopt the beneficial effect of above-mentioned further scheme to be: to adopt axial slotted hole, be convenient to regulate perforated area according to the size of conical shell, conical shell is higher, and axially the axial dimension of slotted hole is larger, and the quantity of the larger axial slotted hole of interior diameter of conical shell is more.
Further, described axial slotted hole is distributed in conical shell bottom, and position is near described circular bottom plate.
Further, described axial slotted hole radius is more than or equal to 5 millimeters, and between the hole of each axial slotted hole, clear distance is more than or equal to 12 millimeters of arc length.
Adopt the beneficial effect of above-mentioned further scheme to be: to provide size and the status requirement of axial slotted hole, both met certain percent opening, can take into account again the restriction of conical shell self structure stability needs and processing technology level.
Further, the top of described axial slotted hole to the distance of the air inlet bottom of described fixed reactor is more than or equal to 60 millimeters to 80 millimeters.
Adopt the beneficial effect of above-mentioned further scheme to be: to reduce the impact of gas deflection on air inlet pipe.
Further, the summation of the side direction perforated area of described conical shell and the perforated area of described circular bottom plate is 3 to 4 times of feed pipe circulation area of described fixed bed reactors.
Adopt the beneficial effect of above-mentioned further scheme to be: can control the gas flow rate of gas by the perforate of described inlet gas distributor is 3 meter per second to 4 meter per seconds.
Further, the side direction perforated area of described conical shell and the perforated area of described circular bottom plate are pressed 7:3 or 8:2 distribution.
Further, the semiapex angle scope of described conical shell is 2 ° to 3 °.
Adopt the beneficial effect of above-mentioned further scheme to be: the rotation flow-disturbing at side and bottom surface formation gas, air-flow is distributed more even, prevent bias current, avoid beds to occur dead band and short circuit, improve the utilization rate of catalyst.
Accompanying drawing explanation
Fig. 1 is the contour structures schematic diagram of fixed bed reactors conventional in prior art;
Fig. 2 is the structural representation of the board-like gas distributor of dish conventional in prior art;
Fig. 3 is the operation principle schematic diagram of the board-like gas distributor of dish conventional in prior art;
Fig. 4 A is the structural representation of inlet gas distributor described in the utility model;
Fig. 4 B is the partial enlarged drawing of the side direction perforate of conical shell in Fig. 4 A;
Fig. 4 C be in Fig. 4 A A-A to cutaway view;
Fig. 5 is the operation principle schematic diagram of inlet gas distributor described in the utility model.
In accompanying drawing, the list of parts of each label representative is as follows:
1, inlet gas distributor, 2, circular bottom plate, 3, conical shell, 4, feed pipe, 5, axial slotted hole, 6, the gas bundle that flows, 7, beds, 8, circular baffle plate, 9, toroidal membrane, 10, catalyst dead band.
The specific embodiment
Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
As shown in Fig. 4 A to Fig. 4 C, the present embodiment provides a kind of inlet gas distributor 1 of fixed bed reactors, and its bottom adopts circular bottom plate 2 with holes, and circular bottom plate 2 tops are the conical shell 3 of side direction perforate.Described inlet gas distributor 1 is connected with the feed pipe 4 of described fixed bed reactors, and the semiapex angle scope of described conical shell 3 is 2 ° to 3 °.
In the present embodiment, the perforate in described circular bottom plate 2 is circular port, and is uniformly distributed, and perforate mode generally adopts equilateral triangle, affected by stringing localized area and also can adopt square to arrange.Perforate spacing can be determined according to different operating operating mode.Under certain percent opening, the small and dense ratio of perforate is large and rare little to pressure drop affects, but perforate is more little, more easily stop up, also should take into account simultaneously and self resist the rigidity needs of gas shock and the restriction of processing technology level, preferred version wherein: the diameter of the perforate in described circular bottom plate is more than or equal to 8 millimeters, and the spacing between each perforate is more than or equal to 20 millimeters.
The side direction perforate of described conical shell 3 is axial slotted hole 5, and it is distributed in conical shell 3 bottoms, and position is near described circular bottom plate 2.Axially the axial dimension of slotted hole 5 regulates by the height of conical shell 3, and the higher axial dimension of conical shell 3 is larger; Axially the quantity of slotted hole 5 regulates by the interior diameter of conical shell 3, and more axially slotted hole 5 quantity are more for conical shell 3 diameters.In addition, while determining the size of axial slotted hole 5, also will consider self structure stability and processing technology level, comparatively preferred version is: axially slotted hole radius is more than or equal to 5 millimeters, and between the hole of each axial slotted hole, clear distance is more than or equal to 12 millimeters of arc length.In addition, as shown in Figure 4 A, for reducing the impact of gas deflection on air inlet pipe, the top of described axial slotted hole to the distance of the air inlet bottom of described fixed reactor is more than or equal to 60 millimeters to 80 millimeters.
In order to control the gas flow rate of gas by the perforate of described inlet gas distributor, be 3 meter per second to 4 meter per seconds, the summation of the side direction perforated area of described conical shell 3 and the perforated area of described circular bottom plate 2 need be 3 to 4 times of feed pipe circulation area of described fixed bed reactors, can also make the side direction perforated area of described conical shell and the perforated area of described circular bottom plate distribute by 7:3 or 8:2 simultaneously.
As shown in Figure 5, compare with the board-like gas distributor of dish, the taper tubbiness perforating structure of the present embodiment distributes inlet air flow to become the mobile gas bundle 6 of pencil shape from thigh shape, and distribution of gas is more even, can prevent bias current, avoid beds 7 to occur dead band and short circuit.Simultaneously, the mobile gas bundle 6 of pencil shape has greatly reduced the circular bottom plate collision rear formation larger reverse kinetic energy of inlet gas to distributor bottom, its impulsive force is spreading on track because constantly being decayed by disturbance, thereby alleviate the erosion of air-flow to fixed bed reactors wall, improve the service life of fixed bed reactors.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. an inlet gas distributor for fixed bed reactors, is characterized in that, its bottom adopts circular bottom plate with holes, and circular bottom plate top is the conical shell of side direction perforate.
2. inlet gas distributor according to claim 1, is characterized in that, the perforate in described circular bottom plate is circular port, and each circular port is pressed equilateral triangle or square is evenly distributed.
3. inlet gas distributor according to claim 1, is characterized in that, the diameter of the perforate in described circular bottom plate is more than or equal to 8 millimeters, and the spacing between each perforate is more than or equal to 20 millimeters.
4. inlet gas distributor according to claim 1, is characterized in that, the side direction perforate of described conical shell is axial slotted hole.
5. inlet gas distributor according to claim 4, is characterized in that, described axial slotted hole is distributed in conical shell bottom, and position is near described circular bottom plate.
6. inlet gas distributor according to claim 4, is characterized in that, described axial slotted hole radius is more than or equal to 5 millimeters, and between the hole of each axial slotted hole, clear distance is more than or equal to 12 millimeters of arc length.
7. inlet gas distributor according to claim 4, is characterized in that, the top of described axial slotted hole to the distance of the air inlet bottom of described fixed reactor is more than or equal to 60 millimeters to 80 millimeters.
8. inlet gas distributor according to claim 1, it is characterized in that, the summation of the side direction perforated area of described conical shell and the perforated area of described circular bottom plate is 3 to 4 times of feed pipe circulation area of described fixed bed reactors, for controlling the gas flow rate of gas by the perforate of described inlet gas distributor, is 3 meter per second to 4 meter per seconds.
9. according to arbitrary described inlet gas distributor in claim 1 to 8, it is characterized in that, the side direction perforated area of described conical shell and the perforated area of described circular bottom plate press 7:3 or 8:2 distributes.
10. according to arbitrary described inlet gas distributor in claim 1 to 8, it is characterized in that, the semiapex angle scope of described conical shell is 2 ° to 3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320678751.XU CN203507981U (en) | 2013-10-30 | 2013-10-30 | Inlet gas distributor of fixed bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320678751.XU CN203507981U (en) | 2013-10-30 | 2013-10-30 | Inlet gas distributor of fixed bed reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203507981U true CN203507981U (en) | 2014-04-02 |
Family
ID=50366966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320678751.XU Expired - Lifetime CN203507981U (en) | 2013-10-30 | 2013-10-30 | Inlet gas distributor of fixed bed reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203507981U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521140A (en) * | 2013-10-30 | 2014-01-22 | 北京石油化工工程有限公司 | Inlet gas distributor of fixed bed reactor |
| CN104923146A (en) * | 2015-06-30 | 2015-09-23 | 新乡市瑞丰新材料股份有限公司 | Baffle plate device of open type reaction kettle |
| CN105013406A (en) * | 2014-04-22 | 2015-11-04 | 中石化洛阳工程有限公司 | Stacked radial fixed bed reactor and application |
| US10201792B2 (en) | 2015-05-14 | 2019-02-12 | Sabic Global Technologies B.V. | Reactors and reactor-internal devices for dehydrogenation of hydrocarbons |
-
2013
- 2013-10-30 CN CN201320678751.XU patent/CN203507981U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521140A (en) * | 2013-10-30 | 2014-01-22 | 北京石油化工工程有限公司 | Inlet gas distributor of fixed bed reactor |
| CN103521140B (en) * | 2013-10-30 | 2016-08-17 | 北京石油化工工程有限公司 | A kind of inlet gas distributor of fixed bed reactors |
| CN105013406A (en) * | 2014-04-22 | 2015-11-04 | 中石化洛阳工程有限公司 | Stacked radial fixed bed reactor and application |
| US10201792B2 (en) | 2015-05-14 | 2019-02-12 | Sabic Global Technologies B.V. | Reactors and reactor-internal devices for dehydrogenation of hydrocarbons |
| CN104923146A (en) * | 2015-06-30 | 2015-09-23 | 新乡市瑞丰新材料股份有限公司 | Baffle plate device of open type reaction kettle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201154303Y (en) | Gas feed distributor | |
| CN102553495B (en) | Fluid bed reactor and gas distribution plate for fluid bed reactor | |
| CN203507981U (en) | Inlet gas distributor of fixed bed reactor | |
| CN204564077U (en) | Gas feed distributor and three phase slurry bed bioreactor | |
| CN202478907U (en) | Gas-liquid distributing device applied to boiling bed reactor | |
| CN206045985U (en) | A kind of gas-liquid partition tray | |
| CN109985570B (en) | Hydrogenation reactor with impact reduction element | |
| WO2015086191A1 (en) | Air distribution nozzle and a fluidized bed reactor | |
| CN106732200B (en) | Turbine type cold hydrogen box | |
| CN101940848B (en) | Catalytic rectification column member | |
| CN104927901A (en) | Gas-liquid distributor used for wood tar fluidized bed reactor | |
| CN202683181U (en) | Continuous reforming reactor with charging hopper | |
| CN109985571B (en) | Hydrogenation reactor with subtract towards subassembly | |
| CN202687982U (en) | Gas distribution device for silane fluidized beds | |
| CN203379868U (en) | Gas distributor for slurry bed reactor | |
| CN211836933U (en) | Liquid redistributor and packed tower | |
| CN103871503A (en) | Nuclear reactor lower chamber plate-like flow distribution apparatus | |
| CN108097178B (en) | Tooth weir type impact reduction and flow equalization disc | |
| CN103521140A (en) | Inlet gas distributor of fixed bed reactor | |
| CN201208555Y (en) | Gas-liquid diffuser | |
| CN109985573B (en) | Hydrogenation reactor for improving liquid phase uniformity | |
| CN203448077U (en) | Concentric round fluid distributor | |
| CN201404777Y (en) | Quenching mixing box | |
| CN219647454U (en) | Liquid distributor | |
| CN202570118U (en) | Spraying tower of improved spraying device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
|
| CX01 | Expiry of patent term |