Scale depositing basket

Abstract

Belonging to the field of petrochemical units, the invention relates to a scale depositing basket for a fixed bed reactor. The scale depositing basket includes: a scale depositing basket frame, an outer screen mounted on the frame and an inner sieve tray arranged in the frame. The scale depositing basket provided in the invention can effectively filter dust scales and other impurities in a liquid raw material, mitigates the scaling problem of impurities on the contact surface of the scale depositing basket and a fixed bed catalyst bed, prolongs the work time of the scale depositing basket, and also 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] In fixed-bed hydrogenation reactors in the field of petroleum refining, liquid raw materials usually contain a certain amount of impurities from upstream equipment. When the liquid raw material entrained with impurities flows through the catalyst bed, the impurities will be deposited in the "voids" of the catalyst bed to form fouling, which will reduce the "voids" of the catalyst bed until the "voids" of the catalyst bed "Filled" with dirt. This will lead to uneven distribution of the fluid in the bed, and the dirt can combine with the carbon deposits generated during the reaction to form a scale layer that blocks the flow channel and causes uneven distribution of the liquid raw material. In addition, scale builds up on the surface of the catalyst bed to form a shell on top of the catalyst. This will cause t...

AI Technical Summary

Problems solved by technology

[0005] In practical applications, since the fouling basket is directly placed on the surface of the catalyst bed, after a period of operation, fouling will occur around the fouling basket and in the surrounding catalyst bed and blockage will occur, making the liquid phase flow path length different. First, it directly affects the uniform distribution of the liquid phase on the catalyst bed, and in severe cases, a fouling shell will be formed, causing problems such as an increase in the pressure drop in the reactor

Images