Diversion trench shaped catalyst orderly filling component in rectifying tower

Abstract

The invention provides a guide channel-shaped catalyst regular packing component in a plate-typed reaction rectifying tower, which is provided with a supporting frame, and a fixed leg is arranged below the bottom surface of the supporting frame; the top surface and the bottom surface of the supporting frame are uniformly welded with a plurality groups of metal sheets in the flowing direction of liquid on the tower plate so as to form an catalyst inserted-sheet channel; the distance of two adjacent groups of metal sheets is a flowing passage of liquid phase and gas phase on the guide tower plate; the catalyst inserted-sheet is filled with catalyst and is formed by a plurality of square prisms which have the cross section of rhombus and are made of metal wire meshes, hexagonal prisms with the cross section of shuttle shape or elliptical cylinders with the cross section of ellipse, in which the inserted-sheet are connected with each other from head to end; metal pressing strips and washer strips clamp the wire mesh through screws from two sides of the metal wire meshes and hang and button on the metal sheet on the top surface and the bottom surface so as to fix the inserted-sheet and form the guide channel-shaped catalyst structured packing component in the plate-typed reaction rectifying tower. The component solves the problem of low catalyst efficiency in the reaction rectifying tower, improves the separation efficiency of the plate-typed tower, has simple structure, and is convenient for processing, manufacture, installation and maintenance.

Description

technical field [0001] The patent of the present invention relates to a new diversion tank-shaped catalyst structured packing assembly used in a plate-type catalytic reaction rectification tower. Background technique [0002] Catalytic distillation is a chemical operation process that integrates catalytic reaction and rectification separation in the same equipment. Compared with traditional processes, it has significant advantages such as separation while reacting, breaking the limit of chemical balance, improving conversion rate, and saving energy. Therefore, the research in this field has been paid much attention. In the 1980s, foreign companies successfully applied catalytic distillation technology to the large-scale industrial production of methyl tert-butyl ether (MTBE). In recent years, reactive distillation has developed from homogeneous reaction to heterogeneous reaction, and has broad application prospects in chemical processes such as etherification, alkylation, e...

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Problems solved by technology

[0003] U.S. Patent No. 4,471,154 directly stacks the catalyst particles on the tray, the bed porosity is small, the pressure drop is large, and it is easy to cause mechanical damage to the catalyst; U.S. Pat. However, because the catalyst is wrapped by a layer of glass cloth and tightly wound into a cylinder, the mass transfer efficiency in the catalyst package is very low during the catalytic distillation process, and the reaction products are not easy to Diffused from the catalyst package, the catalytic efficiency is not high; a new catalyst filling method called Katamax introduced by Koch Company in the United States is to put the catalyst into the interlayer composed of two pieces of corrugated wire mesh, and then bundle it into a brick shape and then pack it. Into the tower, its mass transfer process is the same as conventional structured packing, but it is mainly used in packed towers, and the processing cost is high, and it is difficult to replace the catalyst, especially when a part of it is damaged, it is necessary to replace the whole piece of packing. Operation is not flexible enough

In addition, there are also reports that the catalyst is loaded at the bottom of the downcomer. Due to the limited space at the bottom of the downcomer and the small amount of loading, the distribution of the catalyst in the liquid flow direction of the tray is also extremely uneven and affects the liquid flow. Therefore, it is practical very poor

[0004] In short, most of the existing catalyst loading technologies cannot meet the following three conditions at the same time: ①sufficient channels for gas-liquid two-phase flow; ②good mass transfer performance, the reactants can be transferred to the active center inside the catalyst for reaction , and the product can be passed out from it; ③It is convenient for production and processing, and it is convenient for the loading and replacement of the catalyst

Because of this, the existing catalyst loading technology is still difficult to apply to large-scale industrial production

So far, there is no relatively perfect catalyst packing technology, especially the technology of orderly distributing and packing solid catalysts on tray towers is difficult to be reported.

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