Central oxygen supply water-cooled wall type fixed bed gasifier

Abstract

The invention relates to a central oxygen supply water-cooled wall type fixed bed gasifier. The gasifier comprises a water-cooled wall shell, a gas-liquid separator, a grate system, a coal lock, an ash lock and a stage-by-stage oxygen supplier, wherein the top and bottom of the water-cooled wall shell are respectively provided with an upper end opening and a lower end opening; the gas-liquid separator communicates with the water-cooled wall shell through a pipeline; the grate system comprises a grate and an actuator; the coal lock is mounted at the upper end opening of the water-cooled wall shell; the ash lock is mounted at the lower end opening of the water-cooled wall shell; and the stage-by-stage oxygen supplier comprises a gasifying agent pipeline and a central oxygen supply pipe. Thegasifier disclosed by the invention defines a gasifying combustion chamber by means of the water-cooled wall shell, and brings away heat released by high-temperature and high-pressure coal gas by means of the water-cooled wall shell, preventing the shell from being damaged by ultrahigh temperature, and compared with a water-cooled jacket type shell, the water-cooled wall shell is more convenient to overhaul. By stage-by-stage oxygen supply, the height of a bed layer of a reaction layer can be increased, the proceeding of side reaction is reduced, environmental pollution is reduced, and the risk that a grate overheats is decreased.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a central oxygen supply water-cooled wall type fixed-bed gasifier. Background technique [0002] In related technologies, the main problems of traditional fixed-bed gasifiers are: the grate is overheated, and the annual operation rate is low; In the water, there are problems such as difficult treatment of gasification sewage. Contents of the invention [0003] The object of the present invention is to provide a central oxygen supply water-cooled wall type fixed-bed gasification furnace, which is used to solve the problem of excessive grate temperature and severe environmental pollution existing in the existing gasification furnace. [0004] In order to achieve the above object, the present invention provides a central oxygen supply water-cooled wall type fixed-bed gasifier, said central oxygen supply water-cooled wall type fixed-bed gasifier comprises: [0005] A wa...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a central oxygen supply water-cooled wall type fixed-bed gasifier to solve the problem of excessive grate temperature and severe environmental pollution in existing gasifiers

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