CN203695063U - Disk type spiral self-distribution catalytic distillation structure - Google Patents
Disk type spiral self-distribution catalytic distillation structure Download PDFInfo
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- CN203695063U CN203695063U CN201420065186.4U CN201420065186U CN203695063U CN 203695063 U CN203695063 U CN 203695063U CN 201420065186 U CN201420065186 U CN 201420065186U CN 203695063 U CN203695063 U CN 203695063U
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- catalytic distillation
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Abstract
The utility model relates to a disk type spiral self-distribution catalytic distillation structure. Two types of catalyst components which are arranged at intervals are arranged in the structure, wherein each component A is a filling material piece wrapped with a screen mesh, filled with a catalyst, and cuboid, arched or polygonal in shape, and multiple components A are required to form ring-shaped structures arranged circumferentially; each component B is a cuboid catalyst bag wrapped with a screen mesh, filled with catalyst particles and spiral through twisting; partition boards with holes are required to be placed outside the catalyst bags; multiple components B form ring-shaped structures arranged circumferentially. According to the disk type spiral self-distribution catalytic distillation structure, the partition boards in the catalyst bags of the components B are provided with the holes, and the components B are spiral, so that the length of the flow path of a gas phase is increased, and the contact area of the gas phase and a liquid phase is increased, therefore, the mass transfer efficiency of a filling material is improved. Both the components A and the components B contain the catalyst particles, and are placed alternately, so that the contact time of a reactant and the catalyst is controlled, meanwhile, the uniformity in distribution of the gas phase and the liquid phase is ensured; the reactant and a resultant are enabled to be separated continuously to a tower top and a tower bottom, so as to promote the reaction to be performed continuously.
Description
Technical field
The utility model be a kind of disc type spiral from distribution catalytic distillation structure, belong to chemical industry catalytic rectification process category, particularly process optimization and the strengthening in catalytic rectifying tower tower.
Background technology
Catalytic distillation process is reaction and the coupling that separates two processes, so inner-tower filling material must possess catalysis and gas-liquid mass transfer function simultaneously, raw material is separated in time at the product after catalytic reaction in tower, and driving a reaction is proceeded.The structure of catalytic rectification packing has directly affected the efficiency of catalytic distillation process, requires filler in ensureing in tower that gas-liquid two-phase fully mixes contact, also will make interval range time of contact of reactant and catalyst large and controlled.Industrially generally use short grained resin catalyst, augmenting response surface area, and catalyst grain size hour, is directly placed on and in tower, can increases tower internal drop and even stop up packing layer.Due to technical limitations, resin catalyst is also difficult for making other shapes, mostly belongs to spherical or elliposoidal.Therefore, strengthen tower inner transmission matter efficiency, make reactant and catalyst time of contact controlled, reduce the problems such as tower internal drop and become the important research direction of high-efficient packing for catalytic rectification.
For fortifying catalytic distillation process, Chinese and overseas scholars has researched and developed many catalytic distillation devices.In US3634534, Chevron Research Company at plate column downspout place, can decide by the loadings of catalyst the average contact time of reactant and catalyst by Catalyst packing.Chinese patent 102423680A, a kind of catalyst random packing of Northwest University's exploitation, it is made up of tubular filler shell and the catalyst bag being placed in this filler shell, because filler has loose heap character, and can the regular gas short circuit phenomenon of tying up bag catalyst filling of customer service.In US4242530, the catalytic distillation structure of Chemical Research & Licensing Company exploitation, catalyst is placed in Fibre Bag, Fibre Bag is sewed up also curling, filled in catalytic rectifying tower, this utility model is saved cost, gas-liquid mixed is even, but radial distribution is poor.Chinese patent 03149505.2, the catalytic distillation device of Sinopec Beijing Research Institute of Chemical Industry's exploitation, in the catalyst bag that Catalyst packing is made in silk screen, and is placed in catalyst bag between packing sheet, this utility model mass-transfer performance is good, but tower internal drop is larger.
Summary of the invention
The purpose of this utility model is to provide a kind of catalytic distillation structure efficiently, replaces traditional catalytic rectification packing dish.Helical structure can lengthen gas phase runner, thereby strengthens gas-liquid mass transfer efficiency fortifying catalytic distillation process.
The utility model is achieved in that
A kind of disc type spiral, from distribution catalytic distillation structure, is provided with two kinds of spaced catalyst assemblies in structure; Assembly A is packing sheet outer wrapping silk screen, interior catalyst filling, is shaped as cuboid, arch or polygon, and requirement is that multiple assembly A form being circumferentially arranged of circulus; Assembly B is the cuboid catalyst bag of the built-in catalyst granules of outsourcing silk screen, and is reversed into helical form, and catalyst bag external demand is placed dividing plate with holes, and multiple assembly B form being circumferentially arranged of circulus.
The size of described assembly B dividing plate is consistent with the maximum side of catalyst bag; 50%～95% of the large small catalyst particle diameter of perforate.
Described packing sheet is the structured packing of window diversion filler, mellapak packing, screen waviness packings, perforated plate corrugated filler, protruded corrugated sheet packing or honeycomb filler.
The circulus close-packed arrays that assembly A in described catalytic distillation structure and assembly B form, forms this disc type spiral from distribution catalytic distillation structure.It is that assembly B or center are two kinds of arrangement modes of assembly A that this catalytic distillation structure is divided into center.Assembly A and the contour uniform thickness of assembly B, and contour with this catalytic distillation structure.
The circulus thickness that described assembly A or assembly B form is 1/2～1/200 of tower radius.The circulus that each catalytic distillation structure includes assembly A or assembly B formation is 1～100.
The advantage of the utility model patent has:
1. the dividing plate in the catalyst bag of assembly B is with holes, can ensure that gas-liquid two-phase passes through smoothly.
2. the screw modelling of assembly B, has increased the flow channel of gas phase, has increased gas-liquid two-phase contact area, thus the mass-transfer efficiency of the filler improving.
3. in assembly A and assembly B, all contain catalyst granules, adjust its catalyst content, can control the time of contact of reactant and catalyst.
4. assembly A and assembly B alternately place, and have ensured being uniformly distributed of gas-liquid two-phase, at the bottom of making reactant and product constantly be separated to tower top and tower, and the carrying out of driving a reaction.
Brief description of the drawings
Fig. 1 is the structural representation of position centered by B assembly;
Fig. 2 is the structural representation of position centered by A assembly;
Fig. 3 be A assembly while being arch center be the structural representation of assembly B;
Fig. 4 be A assembly while being arch center be the structural representation of assembly A;
Fig. 5 is the two isogonism axonometric drawings up and down of the utility model construction package B;
Fig. 6 is the side view of the utility model construction package B;
Wherein: 1-catalyst granules; 2-dividing plate with holes; 3-silk screen.
Detailed description of the invention
In conjunction with Fig. 1-Fig. 6, the utility model is illustrated:
The utility model be a kind of disc type spiral from distribution catalytic distillation structure, adopt the catalyst assembling mode of being combined with structured packing, catalyst bag outsourcing silk screen, can prevent that catalyst from exposing, and also can play good liquid wetting action.Spiral has extended the length of gas passage from distributed architecture, thereby has increased the contact area of gas-liquid two-phase, has strengthened the mass-transfer efficiency of this catalytic distillation structure.
In catalytic distillation structure, there are two kinds of assembly A, B.Assembly A is packing sheet outer wrapping silk screen, interior catalyst filling, and silk screen is united by a seam, wherein packing sheet can be the structured packings such as window diversion filler, mellapak packing, screen waviness packings, perforated plate corrugated filler, protruded corrugated sheet packing, honeycomb filler.Assembly B is the cuboid catalyst bag of the built-in catalyst granules of outsourcing silk screen, is reversed into helical form (as shown in accompanying drawing 5,6), and for convenience of moulding, catalyst bag external demand is placed dividing plate with holes; Wherein, the size of dividing plate is consistent with the maximum side of catalyst bag.Perforate size is about 50%～95% of the required catalyst granules diameter of technique.
Assembly A can be processed into cuboid, arch or polygon, is circumferentially arranged, and forms circulus.Assembly B also needs to be circumferentially arranged, and forms circulus.The circulus that assembly A and assembly B form is all linked with one another, and close-packed arrays, is formed into efficient catalytic rectifying structure of the present utility model.
This catalytic distillation structure is according to the difference of assembly A, B placement location, and can be divided into center is that assembly B and center are two kinds of arrangement modes of assembly A.For ensureing being uniformly distributed of gas-liquid two-phase, the catalytic distillation structure of two kinds of arrangement modes needs alternately to arrange when mounted.
Assembly A and the contour uniform thickness of assembly B, and all contour with catalytic distillation structure; The circulus thickness forming is 1/2～1/200 of tower radius, each this catalytic distillation structure include assembly A, assembly B form circulus be 1～100.The difference that loaded catalyst in assembly can require according to concrete technology regulates.In order to ensure passing through smoothly of gas-liquid two-phase, must be with holes on the dividing plate in assembly B, the size of opening diameter is about 50%～95% of the required catalyst granules diameter of technique.
Figure Fig. 1 be A assembly while being rectangle center be the structural representation of assembly B; Fig. 3 be A assembly while being arch center be the structural representation of assembly B.This catalytic distillation structure have assembly A center and assembly B in center two kinds of arrangement modes.For the continuous renewal on liquid film surface, implementation structure inside, and being uniformly distributed of gas-liquid two-phase, two kinds of structures are alternately installed in tower domestic demand.
The shape of assembly A can have multiple, and Fig. 1, Fig. 2 are processed into cuboid to be situation about being arranged in parallel, and are applicable to general operating mode; Fig. 3, Fig. 4 are processed into the situation that arch is arranged radially, are particularly useful for the operating mode that liquid phase radial distribution is had relatively high expectations.Assembly B is conventional catalyst bag twisting formation, has used for reference the structure from branch's device, is conducive to being uniformly distributed of gas phase; In addition, due to its spiral helicine moulding, increase the length of gas flow, be conducive to improve the mass-transfer efficiency of catalytic distillation structure.
Further illustrate below in conjunction with specific embodiment:
Specific embodiment 1:
In methyl acetate hydrolysis technique, assembly A is rectangle and polygonized structure, inner filling mellapak packing.Tower diameter DN4000, center is that assembly A and center are that two kinds of catalytic distillation structures of assembly B are alternately installed.The thickness of assembly A and assembly B is 10m, each 100 of the circulus forming containing assembly A and assembly B in each catalytic distillation structure.Use the utility model catalytic distillation structure and use common bale packing type catalytic rectification packing contrast, saving catalyst amount 15%, methyl acetate hydrolysis rate improves 8.5%-12.3%, and product yield improves approximately 7.8%.
Specific embodiment 2:
Producing MTBE(methyl tertiary butyl ether(MTBE)) in device, assembly A is arch, inner filling metal perforated plate corrugated filler, circumferential array is structure in the form of a ring.Tower diameter DN800, center is that assembly A and center are that two kinds of catalytic distillation structures of assembly B are alternately installed.The thickness of assembly A and assembly B is 20mm, each 20 of the circulus forming containing assembly A and assembly B in each catalytic distillation structure.Use the utility model catalytic distillation structure and use common bale packing type catalytic rectification packing contrast, methanol content reduces 12.8%, and other impurity reduce 10.3%-46.9%, and MTBE content improves 1.8 percentage points, C4 mixture reduces 17.0%, C5 mixture and reduces 15.8%.
Specific embodiment 3:
In the anti-disproportionated reaction rectifier unit of chlorosilane, there is anti-disproportionated reaction and generate trichlorosilane in dichloro-dihydro silicon and silicon tetrachloride, and assembly A is arch, inner filling window diversion filler, and circumferential array is structure in the form of a ring.Tower diameter DN600, center is that assembly A and center are that two kinds of catalytic distillation structures of assembly B are alternately installed.The thickness of assembly A and assembly B is 15mm, each 10 of the circulus forming containing assembly A and assembly B in each catalytic distillation structure.Use the utility model catalytic distillation structure and use common bale packing type catalytic rectification packing contrast, experiment shows, dichloro-dihydro silicon conversion increases by 11.5%, in overhead extraction, trichlorosilane mass fraction increases 7%-13.5%, tower reactor extraction dichloro-dihydro silicon mass fraction reduces by 14% left and right, and catalyst use amount reduces by 6.5%.
Specific embodiment 4:
Producing MTBE(methyl tertiary butyl ether(MTBE)) in device, assembly A is arch, inner filling window diversion filler, circumferential array is structure in the form of a ring.Tower diameter is DN100, and center is that assembly A and center are that two kinds of catalytic distillation structures of assembly B are alternately installed.The thickness of assembly A and assembly B is 25mm, each 1 of the circulus forming containing assembly A and assembly B in each catalytic distillation structure.Use the utility model catalytic distillation structure and use common bale packing type catalytic rectification packing contrast, methanol content reduces 7.6%, and butadiene volume fraction reduces more than 13%, and dimethyl ether volume fraction reduces 10%-17%, other impurity reduce 5%-20%, and MTBE content improves 1.8 percentage points.
Claims (8)
1. disc type spiral, from a distribution catalytic distillation structure, is characterized in that being provided with two kinds of spaced catalyst assemblies in structure; Assembly A is packing sheet outer wrapping silk screen, interior catalyst filling, is shaped as cuboid, arch or polygon, and requirement is that multiple assembly A form being circumferentially arranged of circulus; Assembly B is the cuboid catalyst bag of the built-in catalyst granules of outsourcing silk screen, and is reversed into helical form, and catalyst bag external demand is placed dividing plate with holes, and multiple assembly B form being circumferentially arranged of circulus.
2. structure as claimed in claim 1, is characterized in that the size of described assembly B dividing plate is consistent with the maximum side of catalyst bag; 50%～95% of the large small catalyst particle diameter of perforate.
3. structure as claimed in claim 1, is characterized in that described assembly A or assembly B packing sheet are the structured packing of window diversion filler, mellapak packing, screen waviness packings, perforated plate corrugated filler, protruded corrugated sheet packing or honeycomb filler.
4. structure as claimed in claim 1, the circulus close-packed arrays that the assembly A in the catalytic distillation structure described in it is characterized in that and assembly B form, forms this disc type spiral from distribution catalytic distillation structure.
5. structure as claimed in claim 1, is characterized in that it is that assembly B or center are two kinds of arrangement modes of assembly A that described catalytic distillation structure is divided into center.
6. structure as claimed in claim 5, is characterized in that described catalytic distillation construction package A and the contour uniform thickness of assembly B, and contour with this structure.
7. structure as claimed in claim 1, is characterized in that the circulus thickness that described assembly A or assembly B form is 1/2～1/200 of tower radius.
8. structure as claimed in claim 7, the circulus that each the catalytic distillation structure described in it is characterized in that includes assembly A or assembly B formation is 1～100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420065186.4U CN203695063U (en) | 2014-02-13 | 2014-02-13 | Disk type spiral self-distribution catalytic distillation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420065186.4U CN203695063U (en) | 2014-02-13 | 2014-02-13 | Disk type spiral self-distribution catalytic distillation structure |
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| Publication Number | Publication Date |
|---|---|
| CN203695063U true CN203695063U (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420065186.4U Expired - Fee Related CN203695063U (en) | 2014-02-13 | 2014-02-13 | Disk type spiral self-distribution catalytic distillation structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104587908A (en) * | 2015-01-24 | 2015-05-06 | 福州大学 | Catalyst filling structure applicable to large-tower-diameter catalytic rectifying column and usage thereof |
-
2014
- 2014-02-13 CN CN201420065186.4U patent/CN203695063U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104587908A (en) * | 2015-01-24 | 2015-05-06 | 福州大学 | Catalyst filling structure applicable to large-tower-diameter catalytic rectifying column and usage thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 210046 Wen Lan Road, Qixia District, Nanjing, Jiangsu Province, No. 6 Co-patentee after: Tianjin University Patentee after: CHINA CONSTRUCTION INDUSTRIAL & ENERGY ENGINEERING GROUP Co.,Ltd. Address before: 210046 Yaohua Menyao'an New Village, Qixia District, Nanjing City, Jiangsu Province Co-patentee before: Tianjin University Patentee before: China Construction Installation Engineering Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20220213 |