A combined catalyst stripper

Abstract

The invention discloses a stripper for a combined catalyst or other solid particles, and belongs to the field of gas-solid catalytic reaction. The combined catalyst stripper consists of a plate type overflow stripping region without backmixing at the upper part and a dense-phase grating stripping region at the lower part, wherein stripping gas raising hole plates, catalyst overflow weirs and catalyst descending channels are arranged on an overflow stripping plate; the cross section of the stripper is divided into many channels communicated from top to bottom through gratings in the grating stripping region, so that the high-efficiency contact between a gas phase and a solid phase can be realized, the free flow and the free exchange of the catalyst and stripping gas are realized, and the enough contact time of the catalyst and the stripping gas can also be ensured. The combined catalyst stripper disclosed by the invention is suitable for stripping various catalyst entraining reaction products and various entrainment impurities in the catalytic conversion technology.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a combined catalyst stripping equipment, in particular to a combined equipment for stripping oil gas or other media entrained and adsorbed in the catalyst. Background technique [0002] In the settler of the catalytic conversion device, when the reaction is over, the catalyst after gas-solid separation still entrains some oil and gas, resulting in an increase in the amount of coke, energy consumption, and light oil yield. In order to strip out the oil and gas carried in the catalyst, mainly the oil and gas entrained between the catalyst particles and the oil and gas adsorbed in the catalyst pores, purify the catalyst, and control the heat of burning, we often use steam stripping to remove the oil and gas in the catalyst. Replacement, thus resulting in a catalyst stripping device - the stripper. [0003] The oil-gas displacement and desorption in the stripper is a typical gas-s...

AI Technical Summary

Problems solved by technology

The upper and lower sides of the baffle or grille are catalysts in the state of dense-phase fluidized bed. The baffle or grille is only a component placed in the dense-phase fluidized bed, which cannot separate the catalyst on the upper and lower sides of the baffle or grille, so that the stripping A "backmix" state is formed in the device

This working condition is the same as the "liquid flooded column" working condition in the rectification column, which greatly reduces the efficiency of stripping and mass transfer

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