Coal water slurry gasification furnace for gasifying coal water slurry

Abstract

The invention provides a coal water slurry gasification furnace for gasifying coal water slurry, which comprises a combustion chamber and a chilling chamber, and is characterized in that: the combustion chamber further comprises a quasi-elliptic large-diameter combustion chamber shell, at least two coal water slurry and oxygen three-channel process nozzle chambers which are symmetrically arrangedat the large diameter of the combustion chamber shell and slightly incline downwards, at least two coal water slurry and oxygen three-channel nozzles which slightly incline downwards and are detachably arranged in each coal water slurry and oxygen three-channel process nozzle chamber and of which the openings face the inside of the combustion chamber, a fireproof brick which is lined in the combustion shell, at least two oxygen nozzle chambers which are positioned at the periphery below each coal water slurry and oxygen three-channel process nozzle chamber and incline upwards, at least two oxygen nozzles which incline upwards and are detachably arranged in each oxygen nozzle chamber and of which the openings face the inside of the combustion chamber, and a combustion chamber slag hole which is formed at the bottom of the combustion chamber, wherein the chilling chamber is arranged on the lower part of the combustion chamber and below the combustion chamber slag hole.

Description

technical field [0001] The invention relates to the field of coal gasification, in particular to a coal-water slurry gasifier used for direct gasification of coal-water slurry. Background technique [0002] Coal is used as raw material to directly produce syngas. At present, my country usually adopts atmospheric pressure fixed-bed gasifier, and anthracite lump coal or coke is used as raw material. This process has high energy consumption and high requirements on coal quality, and needs to use anthracite lump coal or coke. During operation, the discharge of "three wastes" is large, and the environmental pollution is relatively serious. [0003] In the past 20 years, in order to improve the thermal efficiency of coal-fired power plants and reduce environmental pollution, many foreign companies have carried out a lot of research and development work on coal gasification combined cycle power generation technology, which has promoted the development of coal gasification technolog...

AI Technical Summary

Problems solved by technology

[0008] However, these two multi-nozzle opposed gasifiers mainly have the following problems: ① Radial nozzles are used for direct hedging in the slender cylinder. Due to the narrow space, the coal-water slurry particles sprayed from each nozzle have not had time to fully disperse The atomization will collide with each other, which limits the atomization effect of the Texaco nozzle; ②The coal-water slurry particles ejected from the opposed nozzles collide with each other to generate a downward impact flow, and the high-speed downward coal-water slurry particle impact flow There must be some parts that rush out of the furnace and enter the quenching chamber before they can be burned in the future, thus limiting the improvement of gasification efficiency; The high-kinetic energy coal-water slurry particles will cause erosion and abrasion to the opposite nozzle and refractory brick, and the impact and ablation of the upward impingement flow and the formed flame will also cause premature damage to the vault brick, thus shortening the use of the nozzle The service life and the operating cycle of the gasifier increase the maintenance cost; ④ When the large slag falls, the edges and corners of the static slag breaker will break it, and the incompletely broken slag block with a large volume will be crushed by the grid on the static slag breaker. Interception, accumulation at the bottom of the static slag breaking cone, easy to cause blockage, it can only be removed during maintenance

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