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Reaction apparatus for producing styrene by dehydrogenation of low pressure drop ethylbenzene

A technology for ethylbenzene dehydrogenation production and reaction device, which is applied in the direction of feeding device, hydrocarbons, hydrocarbons, etc., can solve the problems of inability to meet the low pressure drop of azeotropic heat recovery and energy saving process, and achieves reduction of mixing pressure drop, Improve the effect of mixing uniformity

Active Publication Date: 2017-05-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the existing fixed-bed radial reaction device for preparing styrene from ethylbenzene dehydrogenation cannot meet the low pressure drop (for the reaction device) requirements of the azeotropic heat recovery and energy-saving process

Method used

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  • Reaction apparatus for producing styrene by dehydrogenation of low pressure drop ethylbenzene
  • Reaction apparatus for producing styrene by dehydrogenation of low pressure drop ethylbenzene
  • Reaction apparatus for producing styrene by dehydrogenation of low pressure drop ethylbenzene

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Embodiment 1

[0059] The two-stage negative pressure intermediate reheating reaction system of ethylbenzene dehydrogenation to styrene using azeotropic heat recovery and energy-saving technology adopts such as image 3 The structure type of the reaction device for the production of styrene from ethylbenzene dehydrogenation with ultra-low pressure drop is shown, the diameter of the reactor is 4200 mm, the thickness of the catalyst bed is 600 mm, and the height is 18000 mm. The height-thickness ratio (value) of the catalyst bed is 30, and the catalyst seal height The angle α between the upper baffle and the horizontal plane of the biconical baffle is 74° and the angle β between the lower baffle and the horizontal plane of the biconical baffle is 60°. The diameter of the inner distribution cylinder is 1800mm, and the pitch t of the spiral baffle is 5000mm. The diversion nozzle of the mixer is 4, the diameter of the short pipe is 300mm, and the diameter of the mixing degree adjustment hole is 8...

Embodiment 2

[0061] The two-stage negative pressure intermediate reheating reaction system of ethylbenzene dehydrogenation to styrene using azeotropic heat recovery and energy-saving technology adopts such as image 3 The structure type of the reaction device for the production of styrene from ethylbenzene dehydrogenation with ultra-low pressure drop is shown, the diameter of the reactor is 3100mm, the thickness of the catalyst bed is 550mm, and the height is 11000mm. The height-thickness ratio (value) of the catalyst bed is 20, and the catalyst seal height The angle α between the upper baffle and the horizontal plane of the biconical baffle is 79° and the angle β between the lower baffle and the horizontal plane of the biconical baffle is 45°. The diameter of the inner distribution cylinder is 1400mm, and the pitch t of the spiral baffle is 2000mm. The diversion nozzle of the mixer is 6, the diameter of the short tube is 175mm, and the diameter of the mixing degree adjustment hole is 50mm...

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Abstract

The invention relates to a fixed bed radial reaction apparatus for producing styrene by dehydrogenation of low pressure drop ethylbenzene. The fixed bed radial reaction apparatus is characterized in that a spiral baffle plate is arranged in a reactant gas shunting channel, and a screw-type reactant gas shunting channel is formed. A mixing degree regulation hole is arranged over a diversion nozzle, a high temperature hot zone over the diversion nozzle is reduced, mixing uniformity is increased, and the apparatus is in favor of reducing mixing pressure drop. In addition, a biconical baffle plate is arranged in the catalyst sealing, generation possibility of reaction fluid short circuit is reduced, height of catalyst sealing is reduced, and the utilization rate of the catalyst is increased. The fixed bed radial reaction apparatus is more suitable for the technology requirement for producing styrene through ethylbenzene dehydrogenation by employing an azeotropic heat-recovery energy-saving technology.

Description

technical field [0001] The present invention relates to a fixed bed radial reaction device for ethylbenzene dehydrogenation to styrene, in particular to a fixed bed diameter suitable for low pressure drop ethylbenzene dehydrogenation to styrene using azeotropic heat recovery and energy-saving technology A directional reaction device belongs to the technical field of chemical reaction engineering. Background technique [0002] Styrene is one of the important basic organic raw materials, mainly used in the production of styrene series resins such as polystyrene (PS), acrylonitrile-butadiene-styrene (ABS), styrene-acrylonitrile (SAN), butadiene Styrene rubber (SBR) and styrene-butadiene latex, etc. [0003] At present, the process of ethylbenzene dehydrogenation to styrene is developing in the direction of energy saving. The azeotropic heat recovery energy-saving technology is one of the technologies with the best energy-saving effect in the existing energy-saving technologie...

Claims

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Application Information

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IPC IPC(8): B01J8/02B01J4/00B01F5/00B01F5/06C07C15/46C07C5/333
CPCY02P20/50Y02P20/10
Inventor 朱子彬李瑞江朱学栋黄震尧吴勇强倪燕慧
Owner EAST CHINA UNIV OF SCI & TECH
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