Catalytic rectifying column plate allowing online replacement of catalyst

Abstract

The invention discloses a catalytic rectifying column plate allowing online replacement of a catalyst. The catalytic rectifying column plate comprises a column tray, a plurality of gas-liquid contactelements and suspended downcomers arranged on the column tray, a suspended receiver tray arranged below the suspended downcomers, and a catalyst handling hole for handling a catalyst on the column tray. A free space formed by the suspended downcomers, the gas-liquid contact elements, the column tray and a column wall is a catalyst filling area; the catalyst is loosely packed in the catalyst filling area; each suspended downcomer comprises an inner downcomer passed through the column tray and an outer guide hood that covers the part, above the bottom of the column tray, of the inner downcomer.The catalytic rectifying column plate has no need for complex packaging of a catalyst; the catalyst is directly loosely packed on the column tray; the catalyst can be replaced online with no need forstopping equipment; the catalyst is distributed evenly; pressure drop of the column tray is low; rectifying efficiency is high. In addition, expensive catalyst packaging material and filling materialare omitted, and the cost can be significantly reduced.

Description

technical field [0001] The invention relates to a new type of equipment for a catalytic rectification process, in particular to a catalytic rectification tray capable of replacing catalysts on-line. technical background [0002] In the traditional chemical production process, the reaction raw materials are generally reacted in the reactor first, and then the reaction products enter the downstream separation process for separation and purification. With the continuous advancement of chemical industry technology, the conventional chemical production process of traditional reaction + separation has more and more disadvantages such as complex process, large equipment investment, and high energy consumption. Various new technologies for process strengthening are emerging. Among them, the reactive distillation technology couples the reaction and distillation separation means, which greatly simplifies the equipment and process, and can significantly improve the yield of equilibrium...

AI Technical Summary

Problems solved by technology

Although the structure of the tray is simple, the liquid holding capacity of the sieve tray is limited, the catalyst is unevenly distributed, and the catalyst wears and leaks greatly, which affects the plate efficiency and reaction effect.

Chinese published patent CN01114953 discloses a catalytic rectification tray with a gas riser, the catalyst is scattered at the bottom of the tray, the gas riser is higher than the catalyst height, and gas-liquid mass transfer elements such as float valves, bubble caps, etc. are installed on the gas riser top, because The liquid on the tray flows in one direction in the horizontal direction, the catalyst is unevenly distributed, the rectification efficiency is not high, the reaction liquid cannot pass through the catalyst bed, there are problems such as slow liquid phase replacement, stagnation zone and dead zone, and the reaction effect is affected. influences

Especially for catalytic rectification systems with complex reactions such as serial or parallel reactions, the reaction yield of this type of tray is not good

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