Combined deslagging device of coal gasification system and application method thereof

Abstract

The invention discloses a combined deslagging device of a coal gasification system and an application method of the combined deslagging device. The invention aims to solve the problem that when the operating temperature of an existing entrained-flow bed gasification furnace is low, the fluidity of ash in a waste heat boiler becomes poor, ash deposition is caused, a horizontal flue of a U-shaped gasification furnace is blocked, and thus, continuous operation is affected. According to the combined deslagging device of the coal gasification system, a deslagging port of a waste heat boiler is positioned at the bottom of the waste heat boiler; a gasification furnace deslagging port is located at the bottom of a gasification furnace; one end of a vertical downcomer communicates with the gasification furnace deslagging port, the other end of the vertical downcomer communicates with a slag pool in a combined slag collecting system; and one end of an inclined downcomer communicates with the deslagging port of the waste heat boiler, and the other end of the inclined downcomer communicates with the vertical downcomer. According to the invention, the deslagging port is formed in the bottom ofthe waste heat boiler, so slag in the waste heat boiler directly falls down, forced shutdown of gasification equipment due to the fact that a horizontal flue is blocked and the like caused by workingcondition changes is avoided, operation stability is enhanced, and gasification efficiency and the quality of synthesis gas can be improved.

Description

technical field [0001] The invention relates to a combined slag removal device for coal gasification and a slag removal method using the device. Background technique [0002] my country is the world's largest coal producer and consumer. Coal accounts for about 60% of my country's primary energy consumption structure. Most of the coal is used in the form of direct combustion. The resulting coal-burning pollutants have caused serious damage to the ecological environment. severe pollution. Coal gasification technology is one of the most important clean coal technologies. Coal gasification technology can be used to produce industrial fuel gas, civil fuel gas, chemical synthesis raw material gas, synthetic fuel oil raw material gas, hydrogen fuel cells, synthetic natural gas, rocket fuel, etc. At present, the main coal gasification technologies include moving bed (fixed bed) gasification, fluidized bed gasification, entrained bed gasification and molten bed gasification. The adv...

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Problems solved by technology

[0005] The present invention aims to solve the problem that when the operating temperature of the existing entrained entrained bed gasification furnace is low, the fluidity of the ash in the waste heat boiler becomes poor, resulting in the deposition of ash and slag, which blocks the horizontal flue of the U-shaped gasifier and affects the continuous operation, and even causes The problem of security incidents

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