A Catalytic Rectification Tray with Online Catalyst Replacement

Abstract

The invention discloses a catalytic rectification plate tower capable of replacing catalysts on-line, which comprises a tray, a plurality of gas-liquid contact elements arranged on the tray, a plurality of suspended downcomers, and a suspended The liquid receiving tray and the catalyst loading and unloading hole for loading and unloading the catalyst on the tray, the free space surrounded by the suspended downcomer, the gas-liquid contact element, the tray and the tower wall is the catalyst loading area, and the catalyst is scattered in the In the catalyst loading area, the suspended downcomer includes an inner downcomer passing through the tray and an outer guide cover covering the part of the inner downcomer above the bottom of the tray. The tray does not need to carry out complex packaging of the catalyst, but directly packs the catalyst in bulk on the tray, and the online catalyst replacement can be realized without stopping the device, the catalyst is evenly distributed, the tray pressure is reduced, and the rectification efficiency is high. At the same time, expensive catalyst packaging materials and fillers are 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. [0002] technical background [0003] 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 equ...

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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