S-type fluid bed

Abstract

The invention relates to an S-shape fluidized bed with the main technical solving proposal that the inner wall surface of the fluidized bed shows the wave shape along the direction of a long axle. Theinvention aims at solving the problems of the fluidized bed such as pressure loss, granules mixing, granules build-up and serious wall surface abrasion caused by the phenomenon of 'center-wall pipeflow' in the background technology, providing the S-shape fluidized bed which has even distribution of flow phase speed, solid granules phase speed and concentration.

Description

technical field [0001] The invention relates to a fluidized bed, in particular to an S-type fluidized bed in a circulation system. Background technique [0002] Circulating fluidized bed technology is widely used in thermal crackers, such as petroleum catalytic crackers, thermal power generation, boiler combustion, waste incineration and cement precalciner. Generally speaking, a circulating fluidized bed system consists of a fluidized bed, a cyclone, a pipe from the top of the fluidized bed to the inlet of the cyclone, and a pipe from the bottom of the cyclone to the bottom of the fluidized bed. [0003] In a circulating fluidized bed system, oil, coal or catalyst enters from the bottom of the fluidized bed and enters the cyclone from the top of the fluidized bed. Part of the coal or catalyst entering the cyclone goes out from the top of the cyclone, and the other part enters the bottom of the fluidized bed from the bottom of the cyclone for recirculation. [0004] In petr...

AI Technical Summary

Problems solved by technology

The flow phenomenon of "center-pipe wall flow" causes large pressure loss, particle back-mixing, particle clogging and serious wall wear problems to the whole system

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