Water cooled wall type fixed bed gasifier capable of supplying oxygen in grading way

Abstract

The invention relates to a water cooled wall type fixed bed gasifier capable of supplying oxygen in a grading way. The gasifier comprises a water cooled wall outer shell, a gas liquid separator, a furnace grate system, a coal lock, an ash lock and a graded oxygen supply device. An upper opening and a lower opening are respectively formed in the top and the bottom of the water cooled wall outer shell; the gas liquid separator is communicated with the water cooled wall outer shell through a pipeline; the furnace grate system comprises a furnace grate and a transmission device; the coal lock is installed on the upper opening of the water cooled wall outer shell; the ash lock is installed on the lower opening of the water cooled wall outer shell; the graded oxygen supply device comprises a gasifying agent pipeline and a graded oxygen pipeline. The gasifier limits a gasification combustion chamber through the water cooled wall outer shell, the water cooled wall outer shell takes away the heat released by the high-temperature high-pressure coal gas, the outer shell avoids the damage caused by superhigh temperature, and the water cooled wall outer shell is more convenient to overhaul whenbeing compared with the water cooled sleeve type outer shell. By supplying the oxygen in a grading way, the height of a bed layer of a reaction layer is increased, the side reaction is reduced, the environment pollution is reduced, and the risk that the temperature of the furnace grate exceeds is reduced.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a graded 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 graded oxygen supply water-cooled wall type fixed-bed gasifier, which is used to solve the problem of excessive grate temperature and severe environmental pollution in existing gasifiers. [0004] In order to achieve the above object, the present invention provides a water-cooled wall fixed-bed gasifier with graded oxygen supply. The fixed-bed gasifier with water-cooled wall with graded oxygen supply includes: [0005] A water-cooled wall shell, a gasification...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a graded 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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