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Catalytic distillation filler with low pressure drop

A catalytic rectification, lower technology, applied in fractional distillation, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as uneven distribution of catalysts, poor mass transfer performance, etc.

Active Publication Date: 2014-04-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In US4242530, the catalytic rectification structure developed by Chemical Research & Licensing Company places the catalyst in a fiber bag, sews and crimps the fiber bag, and fills it in a catalytic rectification tower, but its mass transfer performance is not good
Chinese patent 101219400, Tianjin University develops a catalyst net box, which is filled with catalyst in a closed net box made of wire mesh and flat plate with anti-overflow baffle, the catalyst is unevenly distributed, and the mass transfer performance is not good

Method used

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  • Catalytic distillation filler with low pressure drop
  • Catalytic distillation filler with low pressure drop
  • Catalytic distillation filler with low pressure drop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the chlorosilane anti-disproportionation rectification device, dichlorodihydrosilane and silicon tetrachloride undergo an anti-disproportionation reaction to generate trichlorosilane, and the packing adopts window-opening diversion packing and metal calendered orifice corrugated packing. In the reaction section of the tower, there are 9 trays of catalytic rectification packing, 4 packing trays on the upper part, 16 packing sheets in component A and 24 packing sheets in component B in one layer of packing trays, a total of 40 packing sheets. There are 2 packing sheets, and there are 3 packing sheets in each component B, where the ratio of the height of component A to the height of component B is 4:5. There are 5 packing plates in the lower part, 20 packing sheets in component A and 20 packing sheets in component B in one layer of packing plate, 40 packing sheets in total, 2 packing sheets in each component A, and 2 packing sheets in each component B 2 packing sheets, ...

Embodiment 2

[0030] In the FCC gasoline selective hydrogenation desulfurization reaction distillation unit, diolefins are selectively hydrogenated to generate monoolefins. The fillers are window-opening diversion fillers and metal orifice corrugated fillers. There are 24 filler sheets in each layer of packing trays, totaling 48 pieces of packing sheets, each component A and component B have 3 pieces of packing sheets, the height ratio of component A and component C to the height of component B is 1:1, the tower diameter is DN600, and the upper and lower packings are rotated 60°. In order to make the gas-liquid distribution in the reaction section more uniform, an ordinary structured packing with a height of 2m is set in the middle of the reaction section to redistribute the gas-liquid two-phase in the tower. Using the catalytic rectification filler of the present invention is compared with the use of common bundled catalysts. Experiments show that the amount of catalyst used is reduced by 2...

Embodiment 3

[0032] In the light gasoline etherification catalytic rectification device, isopentene (2M1B and 2M2B) reacts with methanol to generate methyl tert-amyl ether. The packing adopts window-opening diversion packing and metal orifice corrugated packing, and a layer of packing disc inner packing There are 20 pieces each, 60 pieces of packing in total. There are 2 pieces of packing in each component A and component B. The height ratio of component A to component B is 1:5, the tower diameter is DN1100, and the upper and lower packings rotate 15°. In order to meet the strength requirements during actual production, it is necessary to add component C to component A to increase the strength of the packing pan, and the height ratio of component C to component B is 4:5. In order to make the gas-liquid distribution in the reaction section more uniform, an ordinary structured packing with a height of 45 cm is set in the middle of the reaction section to redistribute the gas-liquid two-phase ...

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Abstract

The invention relates to a catalytic distillation filler with low pressure drop. A filler layer internally comprises components A and components B, wherein the components A are formed by wrapping a screen net outside filler pieces, filling the screen net with catalysts and sewing the screw net; the components B consist of a regular filler which can be a windowing flow guide filler, a plate corrugated filler, a screen net corrugated filler, a pore plate corrugated filler, a calending hole plate corrugated filler, a honeycomb filler and the like; the components A and the components B are arranged in a staggered manner so as to form the high-efficiency catalytic distillation filler provided by the invention. According to the different strength properties of the filler pieces, when the strength of a filler disc is not adequate to meet industrial production requirements, a component C can be put on the components A so as to reinforce the strength of the filler disc. Gases and liquids can flow alternatively between the components and the filler pieces, so that the use amount of the catalyst is reduced. The contact time of reactants and catalysts can be controlled by adjusting the heights of the components A and the models of the filler pieces. The reactants and resultants can be continuously separated to the tower top and the tower bottom, so as to prompt the reaction.

Description

technical field [0001] The invention relates to a catalytic rectification filler with a relatively low pressure drop, which belongs to the technical category of catalytic rectification in the chemical industry, and in particular relates to process optimization and strengthening in a catalytic rectification tower. Background technique [0002] The catalytic distillation process has both reaction and separation, so the packing in the tower must have both catalytic function and gas-liquid mass transfer function. The products after the catalytic reaction of raw materials in the tower are separated to promote the reaction to continue. Packing is an important internal part in the catalytic distillation column, and its structure directly affects the efficiency of the separation process. While the catalytic rectification packing ensures that the gas-liquid phase in the tower is fully mixed and contacted, it is also necessary to make the contact time range between the reactant and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/32B01D3/14B01J8/02
Inventor 刘春江项文雨丁晖殿刘晨袁希钢
Owner TIANJIN UNIV