Double-bed gasification furnace using universal expansion joint to connect furnace bottom air inlet pipe and circulating fluidized bed

Abstract

The invention discloses a double-bed gasification furnace using a universal expansion joint to connect a furnace bottom air inlet pipe and a circulating fluidized bed, the double-bed gasification furnace comprises a gasification furnace, an air inlet pipe and the universal expansion joint, one side of the gasification furnace is provided with an opening, and one side of the opening is hermetically connected with the universal expansion joint; a one-way expansion joint for connecting the gasification furnace and the air inlet pipe is replaced by the universal expansion joint, that is, the fixed furnace bottom air inlet pipe and the vibrating circulating fluidized bed double-bed gasification furnace body are connected through the universal expansion joint, so that cracking caused by overlarge amplitude can be avoided, gas leakage accidents are avoided, potential safety hazards are eliminated, and the service life of the gasification furnace is prolonged. Shutdown and production halt caused by gas leakage accidents are prevented, the production efficiency is improved, and the loss of funds and production capacity is reduced; and by arranging the reinforcing ribs and the reinforcing plates, the universal expansion joint can be reinforced and supported, the universal expansion joint is protected, and gas leakage can be further prevented.

Description

technical field [0001] The invention relates to the technical field of high-load operation amplitude control of a circulating fluidized bed twin-bed gasifier, in particular to using a universal expansion joint to connect an air inlet pipe at the furnace bottom and a circulating fluidized bed twin-bed gasifier. Background technique [0002] When the circulating fluidized bed double-bed gasification furnace operates at a high load of more than 80%, since the furnace bottom pressure is above 20KPa, the repeated circulation of materials as high as 50 tons or more will bring huge vibration to the furnace body. At this time, the gasification The one-way expansion joint between the furnace body and the fixed furnace bottom air pipe may be subjected to shear tension to generate cracks, resulting in gas leakage, causing safety hazards, and causing shutdowns, reducing production efficiency, and bringing capital and production capacity Loss. Contents of the invention [0003] The ob...

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Problems solved by technology

[0002] When the circulating fluidized bed double-bed gasification furnace operates at a high load of more than 80%, since the furnace bottom pressure is above 20KPa, the repeated circulation of more than 50 tons of materials will bring huge vibration to the furnace body. At this time, the gasification The one-way expansion joint between the furnace body and the fixed furnace bottom air pipe may be subjected to shear tension to produce cracks, resulting in gas leakage, causing safety hazards, and causing shutdowns, reducing production efficiency, and bringing capital and production capacity Loss

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