Scale depositing basket

Abstract

The invention relates to a scale depositing basket for a fixed bed reactor, belonging to the field of petrochemical plants. The scale depositing basket includes a cylindrical frame, an outer screen mesh mounted on the frame and a plurality of sieve tray groups arranged in the frame, wherein each sieve tray group comprises a spatial sieve tray and a planar sieve tray, and holes are arranged along the vertical center axis of the spatial sieve tray. The scale depositing basket provided in the invention can effectively filter ash scales and other impurities in a liquid feed, mitigates the problem of scaling of impurities on the contact surface of the scale depositing basket and a fixed bed catalyst bed during a reaction, prolongs the working time of the scale depositing basket and lengthens the service time of a catalyst.

Description

technical field [0001] The present invention relates to a fouling basket, more particularly to a fouling basket for a fixed bed reactor. Background technique [0002] During the operation of the hydrogenation reaction loaded fixed-bed reactor, the liquid raw material usually contains a certain amount of impurities from the upstream equipment. When the raw material with impurities flows through the catalyst bed, it is deposited in the "gap" of the catalyst bed ” to form dirt. The result is that the "voids" of the catalyst bed are reduced until the "voids" of the catalyst bed are "filled" with fouling. This will lead to uneven distribution of the fluid in the bed, and the fouling can combine with the carbon deposits generated during the reaction process to form a fouling layer, block the flow channel, cause uneven distribution of raw materials, and the accumulation of fouling layer on the surface of the catalyst bed, A shell is formed on top of the catalyst. This will incre...

AI Technical Summary

Problems solved by technology

[0005] In practical applications, since the fouling basket is directly placed on the upper surface of the catalyst bed, after a period of operation, fouling will often occur around the fouling basket and the surrounding catalyst bed and blockage will occur, making the length of the liquid phase flow path Inconsistencies, directly affect the uniform distribution of the liquid phase on the catalyst bed, and in severe cases, shells will also be formed, causing problems such as pressure drop increases

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