CN201558690U - Inner filtering component for slurry bed reactor - Google Patents
Inner filtering component for slurry bed reactor Download PDFInfo
- Publication number
- CN201558690U CN201558690U CN2009201678420U CN200920167842U CN201558690U CN 201558690 U CN201558690 U CN 201558690U CN 2009201678420 U CN2009201678420 U CN 2009201678420U CN 200920167842 U CN200920167842 U CN 200920167842U CN 201558690 U CN201558690 U CN 201558690U
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- screen pipe
- isolation plate
- inner member
- bed reactor
- filtration
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Abstract
An inner filtering component for a slurry bed reactor is composed of a cylinder (1), an upper isolation plate (2) which is of an inverted conical shape, a lower isolation plate (4) and at least one inner filtering pipe (8). An inlet of the filtering pipe (8) is provided at the upper insulation plate (2), and an outlet is provided at the lower isolation plate (3). The wall of the cylinder is connected with a material outlet pipe (10). The range of the conical angle (3) of the upper isolation plate is 20 DEG to 70 DEG. The inner filtering component provided according to the utility model can effectively prevent the deposition of the solid particles in the slurry to the upper part of the filtering pipe, and furthermore has the advantages of filtering pipe blocking prevention, high separating efficiency, and capacity for continuous and stably operating for a long time period. The inner filtering component provided by the utility model furthermore has the advantages of fluid passing selection and uniform fluid distribution when placed in the slurry bed reactor.
Description
Technical field
The utility model relates to a kind of filter assemblies that gas-liquid-solid three-phase slurry attitude bed carries out liquid-solid separation that is used for, more particularly, relate to a kind of in paste state bed reactor distribute the simultaneously filter assemblies of fluid of filter liquide product.
Background technology
Paste state bed reactor is a kind of gas-liquid commonly used (slurry) haptoreaction equipment, has high liquid storage amount.For the very big catalytic reaction process of reaction heat, use paste state bed reactor can remove reaction heat effectively, the isothermal operation of realization response device guarantees the normal operation of reactor, has therefore obtained extensive use in current chemical process.And slurry bed circulatory flow reactor is a kind of efficient heterophase reactor that grows up on the basis of slurry attitude bed bubbling reactor.Slurry bed circulatory flow reactor can also make its inner fluid do well-regulated circulating, thereby strengthen mixing, diffusion, heat transfer and mass transfer between the reactant except the whole advantages that have slurry attitude bed bubbling reactor and had.
In paste state bed reactor,, generally adopt tens microns even more fine grain catalyst, but also brought product to separate this difficult problem with catalyst granules thereupon in order to eliminate diffusion influence.How effectively to realize liquid-solid separation, become the key technology in using slurry attitude bed course of reaction.
The liquid-solid separation of paste state bed reactor catalyst slurry is generally carried out outside reactor, and the slurries that contain catalyst must use specific pump to carry, and the catalyst of separating still need send back in the reactor with the slurries form.This process is easy to cause the breakage of catalyst granules, thereby the long-time continuous operation of reactor is brought problem.
Filtering technique is a common method of obtaining high separating efficiency.Press liquid form, filtration is divided into dead-end filtration and cross-flow filtration, compares traditional dead-end filtration, and the cross-flow filtration filter cake is difficult for piling up, and filter cycle is long, is the emphasis of studying at present.
USP 6068760, WO 02/097007 A2 all disclose and have adopted sedimentation techniques to realize the method for liquid-solid separation in paste state bed reactor, reacted slurries are drawn reactor, behind a sedimentation pipe, slurries enter settling tank and carry out sedimentation, supernatant liquor is discharged as product, and the thick slurry Returning reactor circulation of a large amount of catalyst granules is contained in lower floor.
WO94/16807 discloses in reactor the method for using filter element to realize liquid-solid separation, in case but catalyst granules stops up filter element, the regeneration difficulty of filter element then, thereby be unsuitable for large-scale continuous production.
US 2005/0027021 discloses a kind of liquid-solid piece-rate system, realize liquid-solid separation by the filter element that vertical placement is set outside reactor, what play main filtration is the filter cake that is deposited on the filter element, by regulating the thickness that the slurries flowing velocity is regulated filter cake.But, element space of living in size determined because being design, come controlled filter speed to make adjustable range very limited by the outside slurry flow rate of regulating element merely, and fine grained stop up screen pipe easily and do not have effective back-flushing method to make filter process be difficult to realize serialization.
US 2005/0000861 discloses a kind of filter element that can be placed on inside reactor and/or outside, this element is divided into coarse filtration district and fine filtering district, and the two is coaxial with vertically placement of footpath, block oarse-grained catalyst outside filtering area in coarse filtration district, top, Returning reactor recycles again again, carries out further isolated by filtration and can directly enter the fine filtering district that is located at below the coarse filtration district through the filtrate of coarse filtration.This solid separation method need be by exterior power, and detailed back-flushing method is not provided, and is difficult to realize that liquid-solid continuous effective separates.
In the liquid-solid isolation technics, utilize sedimentation method need take bigger area merely in the existing slurry attitude bed, even valuable reaction compartment; And the method for utilizing conventional filtration is difficult to realize continued operation, also can reduce separative efficiency owing to higher solid content even realized continued operation, also can make the equipment complexity, and investment and operating cost increase.
Summary of the invention
The purpose of this utility model provides a kind of paste state bed reactor that is used for, and realizes that highly-efficient liquid-solid separates, has simultaneously the filtration inner member of fluid distribution effect continuously.
The filtration inner member of the paste state bed reactor that the utility model provides, form by cylinder 1, turbination upper isolation plate 2, lower isolation plate 4 and inner at least one screen pipe 8, screen pipe 8 inlets are opened on upper isolation plate 2, exit opening is in lower isolation plate 3, the cylinder body wall connects discharge nozzle 10, and the scope of the coning angle 3 of described upper isolation plate is 20 °-70 °.
The filtration inner member that the utility model provides, described self-filtering pipe can be one or more, when chimney filter is many, for example chimney filter is that 5 situation is seen accompanying drawing 2, and a screen pipe is installed in the bottom that back taper upper isolation plate is 2, and remaining screen pipe is opened on the conical surface of back taper division board 2, evenly distribute as far as possible, the diameter of screen pipe can be identical, also can be different, and preferred scheme is that the diameter of inverted cone-shaped structure bottom screen pipe is greater than the screen pipe diameter that is opened on the conical surface.
When screen pipe was one, end entrance was opened on the bottom of back taper upper isolation plate on the screen pipe, perhaps on the back taper division board a plurality of openings was arranged so that have the slurries of solid particle and passed through screen pipe, as shown in Figure 3.
In the filtration inner member that the utility model provides, the material of described screen pipe can be used the filtering material of sintered metal mesh micropore filter material, sintering metal powder micropore filter material, metal micro-holes membrane material, sintered metal fiber poromerics, micropore ceramics material, ceramic membrane material or other type without limits.The pore diameter range of screen pipe can be changed by the scale of the kind of the catalyst granules of concrete use, reactor and the reaction type that is carried out, for example within filter areas such as micro-filtration, ultrafiltration, nanofiltration.
When the filtration inner member that the utility model provides uses, be installed in paste state bed reactor inside, the pipeline of described screen pipe 8 inside is that slurries are by filtering the slurries district of inner member, the closed area that cylinder 1 inwall and screen pipe 8 outer walls surround is filtrate filtered district 7, and described filtrate district 7 is by discharge nozzle 10 and paste state bed reactor external communications.The slurries that comprise solid particle flow into the slurries district 7 of screen pipe inside by end entrance on the inner member, and radially the tube wall by screen pipe 8 enters the filtrate district from inside to outside, and finally draws paste state bed reactor as product through liquid outlet opening 10 pipelines.Owing to adopt cross-flow filtration, the slurries of crossing along the screen pipe axial flow constantly wash away the filter cake of screen pipe inwall, carry it into and continue reaction in the paste state bed reactor, have therefore suppressed the generation of filter cake on the screen pipe inwall, have prolonged the working time of filter element.
In addition, the utility model provide the filtration inner member in use, because the long-pending cross-sectional area with slurry attitude bed of the flow channel cross-section in the screen pipe is compared very little, be (0.01-1): 10, when being used for the three phase slurry bed bioreactor, because gas phase can be selected the flow passage that flow channel cross-section is long-pending greatly, flow resistance is little, thereby gas phase will seldom be filtered the slurries runner of inner member through this, can prevent effectively that gas from entering the member runner, have the function of selecting fluid to pass through, thereby can be used as the inner member use of uniform fluid (particularly gas phase).It is uneven diametrically that large scale industry paste state bed reactor internal gas distributes, usually the gas phase flux of reactor center position apparently higher than other position the flux of Bian Bi position particularly, therefore gas phase can be ordered about to other direction distribution in the centre that this member is positioned over reactor, realize the purpose of even distribution gas phase, promote course of reaction to carry out uniformly at inside reactor.
A plurality of filtration inner members can be installed in paste state bed reactor to be used in combination.
Filtration inner member that the utility model provides and application process thereof are applicable to gas-liquid-solid phase reaction and need isolate the chemical reaction process of fluid product from slurries, as adopting hydrocarbon oil hydrogenation, certain embodiments and the Fischer-Tropsch building-up process of suspension bed or paste state bed reactor.
The beneficial effect of the filtration inner member that the utility model provides is:
The filtration inner member that the utility model provides is placed on paste state bed reactor inside, because arrival end adopts the type of falling vertebra structure, can realize that solid catalyst particle liquid form product continuous high-efficient separates, avoided solid particle to be deposited on the generation that the filter element arrival end stops up the screen pipe phenomenon, thereby improve filter efficiency.Can move by the long period continous-stable, can evenly distribute by convection cell.
Description of drawings
The filtration inner member generalized section that Fig. 1 provides for the utility model;
Fig. 2 is the filtration inner member perspective view that comprises 5 chimney filters;
Fig. 3 is the filtration inner member perspective view that comprises 1 chimney filter;
Fig. 4 is applied to the schematic flow sheet of paste state bed reactor for filter element.
The specific embodiment
The filtration inner member that specifies the utility model and provide below in conjunction with accompanying drawing is used for the synthetic paste state bed reactor continued operation process that generates liquid hydrocarbon of Fischer-Tropsch, but therefore the utility model is not restricted.
Solid particle then is arrested on the inwall that filters inner member screen pipe 8, because the souring of slurries, part filter cake on screen pipe 8 inwalls constantly comes off and flows downward with slurries and turns back in the reactor 9, the filter cake of part difficult drop-off can be trapped on the inwall of screen pipe, along with constantly thickening of filter cake, pressure reduction between screen pipe is inside and outside rises, and when pressure reduction was higher than 0.5MPa, the backwashing system that discharging opening 10 connects was started working.Be positioned at liquid discharging valve 11 and close this moment, the backwash medium is introduced valve 12 and is opened, under the promotion that adds reverse pressure reduction, the backwash medium is through the tube wall that discharging opening 10 is introduced in the filtrate district 7 and radially ecto-entad passes through to filter screen pipe 8, and the filter cake that will adhere to springs back in the slurries.When screen pipe 8 tube wall inside and outside differential pressures were lower than 0.1MPa, flushing process finished, and backwash this moment medium is introduced valve 12 and closed, and liquid discharging valve 11 is opened, and system returns to normal operating state.
In addition, owing to filter the long-pending cross-sectional area that is far smaller than reactor 9 of inner member flow channel cross-section, so gas generally can not enter the screen pipe runner that filters inner member inside, has the function of selecting fluid to pass through.In slurry attitude bed, gas flow distribution is generally the center height, the limit wall is low, therefore the filtration inner member that the utility model is provided places the center of reactor 9, helps gas and distributes to limit wall direction, thereby realize gas even distribution diametrically in the paste state bed reactor.
The following examples illustrate further the method that the utility model provides, but therefore do not limit the utility model.
Embodiment
As accompanying drawing 4, the decanting zone that the top caliber of slurry bed circulatory flow reactor enlarges and the caliber ratio of lower reaction zone are 1.5: 1, and the lower reaction zone diameter is 500mm.Filter element is placed on the reactor center position, is positioned at 1m on the gas distributor.Chimney filter external diameter in the filter element is 50mm, long 1000mm, and the structure coning angle 3 of back taper type upper isolation plate is 45 °, used material is the sintered porous metal chimney filter, average pore size 1 μ m.The circulation area of filter element is 0.08: 1 with reaction zone cross-sectional area ratio.
The particle size range of the catalyst that is adopted is 1～100 μ m, and synthesis gas enters bed by gas distributor with the form of bubbling by paste state bed reactor bottom, under operating condition, and reaction solution attitude hydrocarbon.Unreacted synthesis gas separates with slurries fully with gas products after slurries rise to the decanting zone, and is discharged by exhaust outlet.The slurries that contain liquid form product enter the filtration inner member, and fluid product enters filtrate district and final as drawing by the chimney filter wall that filters inner member.Because the souring of slurries, part filter cake on the filter element inner pipe wall constantly comes off and gets back to reactor with downward liquid flow, the filter cake of part difficult drop-off can be stayed on the chimney filter inwall, along with constantly thickening of filter cake, when the pressure reduction between the inner and outer pipes surpasses 0.5MPa, the valve liquid discharging valve 11 that is positioned at behind the liquid discharge gate 10 is closed, the recoil medium is introduced valve 12 and is opened, with pump the product clear liquid is introduced the filtrate district, and enter in the chimney filter and manage by filtering tube wall, filter cake is flushed in the slurries, and returns tedge along with slurries flow downward.This process continues several seconds, and when the pressure reduction between inner and outer pipes was lower than 0.1MPa, backwashing system and liquid outlet opening 10 disconnected, and system returns to normal operating state.
The content of solid particle is less than 5 μ g/ml in the liquid form product that liquid outlet opening is drawn, and the maximum gauge of particle is 2 μ m.Separative efficiency is more than 99%.Wherein separative efficiency is calculated by following formula:
η＝(S
m-S
f)/S
m
Wherein: S
mSolid content in the=raw material (slurries before filtering); S
fSolid content in the=product (clear liquid that draw in the filtrate district).
Simultaneously, because filter element has the effect of even distributing gas, the gas holdup of reactor center position has not reduced by 20% when more placing filter element, and the overall reactor gas holdup does not obviously change, therefore can illustrate that gas is evenly distributed in the reactor more, helps promoting the carrying out of course of reaction.
Claims (5)
1. the filtration inner member of a paste state bed reactor, it is characterized in that forming by cylinder (1), turbination upper isolation plate (2), lower isolation plate (4) and inner at least one screen pipe (8), screen pipe (8) inlet is opened on upper isolation plate (2), exit opening is in lower isolation plate (3), the cylinder body wall connects discharge nozzle (10), and the scope of the coning angle of described upper isolation plate (3) is 20 °-70 °.
2. according to the filtration inner member of claim 1, it is characterized in that the long-pending ratio with the cross-sectional area of starching the attitude bed of flow channel cross-section in the described screen pipe (8) is (0.01-1): 10.
3. according to the filtration inner member of claim 1, it is characterized in that described self-filtering pipe (8) is two when above, the diameter of inverted cone-shaped structure bottom screen pipe is greater than the screen pipe diameter that is opened on the conical surface.
4. according to the filtration inner member of claim 1, when it is characterized in that described self-filtering Guan Weiyi root, on the inverted upper taper division board (2) at least one opening is arranged and pass through screen pipe so that have the slurries of solid particle.
5. according to the arbitrary filtration inner member among the claim 1-4, the material of described screen pipe is sintered metal mesh micropore filter material, sintering metal powder micropore filter material, metal micro-holes membrane material, sintered metal fiber poromerics, micropore ceramics material, ceramic membrane material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201678420U CN201558690U (en) | 2009-07-30 | 2009-07-30 | Inner filtering component for slurry bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201678420U CN201558690U (en) | 2009-07-30 | 2009-07-30 | Inner filtering component for slurry bed reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201558690U true CN201558690U (en) | 2010-08-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201678420U Expired - Lifetime CN201558690U (en) | 2009-07-30 | 2009-07-30 | Inner filtering component for slurry bed reactor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201558690U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512513A (en) * | 2016-12-01 | 2017-03-22 | 中国石化长城能源化工（宁夏）有限公司 | Slurry-bed reactor catalyst filtering assembly |
| CN107398239A (en) * | 2017-09-05 | 2017-11-28 | 陕西未来能源化工有限公司 | A kind of device and its application method of paste state bed reactor separation different-grain diameter catalyst |
-
2009
- 2009-07-30 CN CN2009201678420U patent/CN201558690U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512513A (en) * | 2016-12-01 | 2017-03-22 | 中国石化长城能源化工（宁夏）有限公司 | Slurry-bed reactor catalyst filtering assembly |
| CN107398239A (en) * | 2017-09-05 | 2017-11-28 | 陕西未来能源化工有限公司 | A kind of device and its application method of paste state bed reactor separation different-grain diameter catalyst |
| CN107398239B (en) * | 2017-09-05 | 2023-04-21 | 陕西未来能源化工有限公司 | Device for separating catalysts with different particle sizes by slurry bed reactor and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100825 |