CN103691387A - Circularly-arranged catalytic distillation packing - Google Patents
Circularly-arranged catalytic distillation packing Download PDFInfo
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- CN103691387A CN103691387A CN201310689147.1A CN201310689147A CN103691387A CN 103691387 A CN103691387 A CN 103691387A CN 201310689147 A CN201310689147 A CN 201310689147A CN 103691387 A CN103691387 A CN 103691387A
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Abstract
The invention relates to circularly-arranged catalytic distillation packing. Two types of components are arranged in a packing layer, wherein each component 1 is defined by stacking packing sheets, wrapping the packing sheets by using a layer of screen mesh, filling catalysts in the screen mesh and sewing the screen mesh, and the packing sheets are windowed flow guide packing, plate corrugated packing, orifice corrugated packing, metal wire mesh packing and wire mesh corrugated packing; each component 2 is defined by structured packing sheets, and is a structured packing sheet such as a windowed flow guide packing sheet, metal wire mesh packing, wire mesh corrugated packing, piercing hole corrugated packing, an orifice corrugated packing sheet and a cellular packing sheet; the components 1 and 2 are stacked and curled, and are fixed by banding pieces to form the catalytic distillation packing. According to the packing, the packing sheets are circularly arranged, and the time of contact between reagents and the catalysts can be controlled by regulating the amount of the catalysts, so that reaction effects are enhanced, and meanwhile, pressure drop in a tower can be reduced; the components 1 and 2 are alternately arranged, and the reagents and products are continuously separated to the top and bottom of the tower to facilitate the forward conduction of reaction.
Description
Technical field
The invention belongs to chemical industry catalytic rectification process category, particularly process optimization and the strengthening in catalytic rectifying tower tower; The catalytic rectification packing that relates to a kind of circular arrangement.
Background technology
Catalytic distillation process had both comprised course of reaction, comprised again separation process, so inner-tower filling material must possess catalysis and two functions of gas-liquid mass transfer simultaneously.Raw material is separated at the product after catalytic reaction in tower, and driving a reaction is proceeded.The filling-material structure of catalytic rectifying tower is one of key factor of influence process efficiency, and filler should guarantee that in tower, liquid phase fully mixes contact, makes again interval range time of contact of reactant and catalyst large and adjustable.
The current industrial short grained resin catalyst that generally uses, with augmenting response surface area.But when catalyst grain size hour, being directly placed on can significantly increase tower internal drop in tower and even can cause packing layer to stop up.Due to technical limitations, resin catalyst belongs to spherical or elliposoidal mostly, is difficult for making other shapes.Therefore, how to reduce tower internal drop, promote mass-transfer progress in tower and make the problems such as time of staying of filler is controlled become the important directions of research high-efficient packing for catalytic rectification.
For fortifying catalytic distillation process, Chinese and overseas scholars has researched and developed many catalytic distillation devices.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, and the filler pressure drop of this structure is larger.Publication number is the Chinese patent application of 102423680A, it is a kind of catalyst random packing of Northwest University's exploitation, it consists of tubular filler shell and the catalyst bag being placed in this filler shell, because filler has loose heap character, can overcome regular gas short circuit phenomenon of tying up bag catalyst filling, but its mass-transfer performance is not good enough.In US3634534, Chevron Research Company at plate column downspout place, controls Catalyst packing the average contact time of reactant and catalyst, but is not suitable in packed tower with the loadings of catalyst.
Summary of the invention
The object of this invention is to provide a kind of efficient catalytic rectification packing, fortifying catalytic distillation process, the reaction effect of reinforcement catalytic rectifying tower, reduces the pressure drop in catalytic rectifying tower.
The present invention is achieved in that
A kind of catalytic rectification packing with circular arrangement, in packing layer, be provided with two kinds of assemblies: packing sheet is stacked together, coated outside one deck silk screen, interior catalyst filling, silk screen is united by a seam, be defined as assembly 1, packing sheet is window diversion filler, mellapak packing, perforated plate corrugated filler, wire mesh packing, screen waviness packings; Structured packing sheet is defined as assembly 2; Assembly 2 is the structured packing sheet of window diversion packing sheet, wire mesh packing, screen waviness packings, acanthopore ripple packing, perforated plate corrugated filler sheet, protruded corrugated sheet packing sheet or honeycomb packing sheet; Assembly 1 stacks with assembly 2 and is curling, then with banding sheet, fixes, and forms catalytic rectification packing.
1. assembly 1 and assembly 2 exist simultaneously, do not establish packing sheet, a loading catalyst in the packing box of catalytic rectification packing in assembly 1.
2. in catalytic rectification packing, do not contain assembly 2.
3, assembly 1 and assembly 2 exist simultaneously.
During the interior conversion zone placement of multiple layers packing box of tower, 0 ° to 180 ° installation of upper and lower packing box rotation.
If for gas-liquid two-phase in tower is more uniformly distributed, between two dish catalytic rectification packing dishes, can place the common structured packing of 0～2m height and carry out distributing again of gas-liquid two-phase.
During filler filling, levels mounting means can be identical, also can be different.
The advantage of patent of the present invention has:
1. packing sheet is rounded arranges, and can control the time of contact of reactant and catalyst by adjusting the amount of catalyst, intensified response effect; Meanwhile, can reduce tower internal drop.
2. assembly 1 is alternately placed with assembly 2, and at the bottom of making reactant and product constantly be separated to tower top and tower, driving a reaction carries out to forward.
3. the sheet number of assembly 2 is adjustable, thereby can adjust the loadings of catalyst in assembly 1, optimizes Liquid Flow and mass transport process in tower.
Accompanying drawing explanation
Fig. 1 is the top view of filler of the present invention;
Fig. 2 does not establish the schematic diagram of packing sheet in assembly 1 in filler of the present invention;
Fig. 3 does not establish the schematic diagram of packing sheet in assembly 2 in filler of the present invention;
Wherein 1 ?the packing sheet of catalyst is housed, 2 ?packing sheet, 3 ?tower wall.
The specific embodiment
High-efficient packing for catalytic rectification, employing is tied up the structured packing of bag catalytic distillation and is assembled with the mode that the structured packing of modularization catalytic distillation combines, packing sheet outsourcing silk screen, inner catalyst filling, silk screen can prevent that catalyst from exposing, and also can play good liquid wetting action.
In conjunction with key diagram 1, the present invention will be described:
Fig. 1 is the top view of filler of the present invention, and assembly 1, assembly 2 are filled in respectively in packed tower, with banding sheet, each packing sheet banding is also fixing.Liquid phase is from the filler of assembly 1 and assembly 2 to dirty, liquid phase is moving at the filler inner counter resurgent of assembly 1, Partial Liquid Phase sees through the structured packing that the good silk screen of wettability enters assembly 2, and in the structured packing of assembly 2, Partial Liquid Phase also sees through the window diversion filler that silk screen enters assembly 1 simultaneously.Liquid phase alternately flows in two kinds of assemblies, has promoted the separated of the carrying out of reaction and system.Gas phase rises in assembly 2, and with mass transfer in liquid phase, final tower top is gathered in the crops light phase, results heavy phase at the bottom of tower.
Below in conjunction with specific embodiment, further illustrate:
Embodiment 1:
In methyl acetate hydrolysis process, filler adopts window diversion filler and corrugated plate packing, and in one deck packing box, assembly 1 includes 2 of packing sheets, assembly 2 includes 4 of packing sheets, then by the packing sheet cans being superimposed together, tower diameter DN600, when upper and lower packing box is installed without rotation.Conversion zone is established 6 dish fillers, and establishes the common structured packing that 25cm is high between the 3rd dish and the 4th dish filler, so that gas-liquid distributes more even in conversion zone.Use catalytic rectification packing of the present invention and use common bale packing type catalyst contrast, methyl acetate hydrolysis rate improve 8.5% ?14.3%, product yield improves approximately 12%.
Embodiment 2:
Producing MTBE(methyl tertiary butyl ether(MTBE)) in device, filler adopts window diversion filler and metallurgic orifice corrugated packing.Filler is totally 14 dishes, and in the 4 dish fillers on tower top, in assembly 1, not containing a packing sheet catalyst filling, assembly 2 includes 6 of packing sheets, then by the packing sheet cans being superimposed together; In 10 dish fillers of tower bottom, assembly 1 includes 2 of packing sheets, and assembly 2 includes 2 of packing sheets, then the silk screen of the packing sheet cans assembly 1 being superimposed together is adopted to stainless steel, tower diameter DN700,120 ° of upper and lower filler rotations.Because tower inner fluid distribution situation is good, in conversion zone, no longer establish common structured packing.Use catalytic rectification packing of the present invention and use common bale packing type catalyst contrast, methanol content reduces 12.5%, C4 mixture and reduces 19.5%, C5 mixture and reduce 28.4%, other impurity reduce 10.3% ?50%, MTBE content improves 1.72 percentage points.
Embodiment 3:
In FCC gasoline selective hydrodesulfurizationmodification reaction and rectification device, alkadienes selective hydrogenation generates monoolefine.In the conversion zone of reactive distillation column, in one deck packing box, assembly 1 includes 3 of packing sheets, in assembly 2, not containing packing sheet, in this packing box, only contains assembly 1, cans, tower diameter DN650, upper and lower filler Rotate 180 °.In conversion zone, establish 12 dish fillers, between the 9th dish and the tenth dish filler, place the common structured packing that 2m is high, so that gas-liquid distributes more even in conversion zone.Use catalytic rectification packing of the present invention and use common bale packing type catalyst contrast, experiment shows, catalyst use amount reduction by 14%, and in tower, overall presure drop reduces by 24.5%, and desulfurization degree increases by 10.6%, and catalyst life increases by 16%, loss of octane number minimizing 13～20%.
Embodiment 4:
In the catalytic rectifying tower of synthetic ethyl tert-butyl ether (ETBE) (ETBE), tower diameter DN800, establishes 8 dish fillers in conversion zone, and in the 1st to the 5th dish filler, assembly 1 includes 2 of packing sheets, and assembly 2 includes 2 of packing sheets, Rotate 180 ° when upper and lower packing box is installed.Between the 5th dish and the 6th dish filler, place the window diversion filler that 40cm is high, so that gas-liquid distributes more even in conversion zone.In the 6th to the 8th dish filler, assembly 1 includes 2 of packing sheets, and assembly 2 includes 4 of packing sheets, and upper and lower packing box rotates 120 ° while installing.Use catalytic rectification packing of the present invention and use common bale packing type catalyst contrast, experiment shows, catalyst use amount reduces by 16.5%, and reflux ratio can drop to 4.7 by 5, and the conversion ratio of isobutene is increased to 87%., in tower, overall presure drop reduces by 14%.
Claims (5)
1. a catalytic rectification packing with circular arrangement, it is characterized in that being provided with in packing layer two kinds of assemblies: packing sheet is stacked together, coated outside one deck silk screen, interior catalyst filling, silk screen is united by a seam, be defined as assembly 1, packing sheet is window diversion filler, mellapak packing, perforated plate corrugated filler, wire mesh packing, screen waviness packings; Structured packing sheet is defined as assembly 2; Assembly 2 is the structured packing sheet of window diversion packing sheet, wire mesh packing, screen waviness packings, acanthopore ripple packing, perforated plate corrugated filler sheet, protruded corrugated sheet packing sheet or honeycomb packing sheet; Assembly 1 stacks with assembly 2 and is curling, then with banding sheet, fixes, and forms catalytic rectification packing.
2. filler as claimed in claim 1, is characterized in that in assembly 1, not establishing packing sheet, a loading catalyst in the packing box of catalytic rectification packing.
3. filler as claimed in claim 1, is characterized in that not containing in catalytic rectification packing assembly 2.
4. filler as claimed in claim 1, while it is characterized in that in tower conversion zone placement of multiple layers packing box, 0 ° to 180 ° installation of upper and lower packing box rotation.
5. filler as claimed in claim 4, is characterized in that placing 0～2m common structured packing highly between two dish catalytic rectification packing dishes and carries out distributing again of gas-liquid two-phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310689147.1A CN103691387A (en) | 2013-12-13 | 2013-12-13 | Circularly-arranged catalytic distillation packing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310689147.1A CN103691387A (en) | 2013-12-13 | 2013-12-13 | Circularly-arranged catalytic distillation packing |
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| CN201310689147.1A Pending CN103691387A (en) | 2013-12-13 | 2013-12-13 | Circularly-arranged catalytic distillation packing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307459A (en) * | 2014-10-02 | 2015-01-28 | 北京玉珠峰科技有限公司 | Novel fluid-air exchange filler |
| CN104436733A (en) * | 2014-11-30 | 2015-03-25 | 林国友 | Medium-and-small sized packing tower |
| CN104436732A (en) * | 2014-11-30 | 2015-03-25 | 林国友 | Novel packed tower |
| CN104829435A (en) * | 2015-04-30 | 2015-08-12 | 中建安装工程有限公司 | Apparatus for producing MTBE by using novel catalytic distillation structured packing, and method thereof |
| CN107051368A (en) * | 2017-01-25 | 2017-08-18 | 天津大学 | The packed catalytic rectification packing of disc type assembling |
| CN108262013A (en) * | 2018-01-24 | 2018-07-10 | 清华大学 | Carbon nanotube adsorption component, preparation method and application |
| CN110773107A (en) * | 2019-11-25 | 2020-02-11 | 蓝太克环保科技(上海)有限公司 | Winding type packing structure for gas-liquid mass transfer |
| CN111714915A (en) * | 2020-05-28 | 2020-09-29 | 杭州杭氧填料有限公司 | Mixed mass transfer interfacial type experimental-stage rectifying tower |
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| CN101347716A (en) * | 2008-09-02 | 2009-01-21 | 南京大学 | Strong-effect regular packing without wall flow |
| CN102824890A (en) * | 2012-09-18 | 2012-12-19 | 天津大学 | Catalytic distillation filler with alternative flow structure |
| CN203695061U (en) * | 2013-12-13 | 2014-07-09 | 中建安装工程有限公司 | Circularly distributed catalytic distillation packing |
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2013
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307459A (en) * | 2014-10-02 | 2015-01-28 | 北京玉珠峰科技有限公司 | Novel fluid-air exchange filler |
| CN104436733A (en) * | 2014-11-30 | 2015-03-25 | 林国友 | Medium-and-small sized packing tower |
| CN104436732A (en) * | 2014-11-30 | 2015-03-25 | 林国友 | Novel packed tower |
| CN104829435A (en) * | 2015-04-30 | 2015-08-12 | 中建安装工程有限公司 | Apparatus for producing MTBE by using novel catalytic distillation structured packing, and method thereof |
| CN107051368A (en) * | 2017-01-25 | 2017-08-18 | 天津大学 | The packed catalytic rectification packing of disc type assembling |
| CN108262013A (en) * | 2018-01-24 | 2018-07-10 | 清华大学 | Carbon nanotube adsorption component, preparation method and application |
| CN108262013B (en) * | 2018-01-24 | 2020-11-10 | 清华大学 | Carbon nanotube adsorption member, preparation method and application |
| CN110773107A (en) * | 2019-11-25 | 2020-02-11 | 蓝太克环保科技(上海)有限公司 | Winding type packing structure for gas-liquid mass transfer |
| CN110773107B (en) * | 2019-11-25 | 2024-02-13 | 蓝太克环保科技(上海)有限公司 | Coiled packing structure for gas-liquid mass transfer |
| CN111714915A (en) * | 2020-05-28 | 2020-09-29 | 杭州杭氧填料有限公司 | Mixed mass transfer interfacial type experimental-stage rectifying tower |
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Application publication date: 20140402 |