Water-cooled biomass boiler anti-coking method and device

Abstract

The invention provides a water-cooled biomass boiler anti-coking method and device. A helical blade is welded to a hollow shaft, and the hollow shaft is internally provided with a water inlet pipe; the tail end of the water inlet pipe and the tail end of the hollow shaft form a jacket structure to guarantee that cooling water can be recycled smoothly; water enters the water inlet pipe, passes through the hollow shaft and finally flows out of a water outlet pipe; jacket structures including the water inlet pipe, the hollow shaft, the helical blade and the like are adopted, the helical blade smashes coke blocks in a hearth and sends the coke blocks out of the hearth, normal air feeding at the bottom of the hearth is guaranteed, fuel can be burnt completely, and the coking problem is solved; the heating temperature of steel is lowered through circulating of water, universality of selected materials is guaranteed, a special material resistant to a high temperature is not needed, and only ordinary steel is needed; and an automatic deslagging function is achieved, and ash generated after the fuel is completely burnt is discharged out of a furnace along with the smashed coke blocks through rotation of the helical blade.

Description

technical field [0001] The invention provides a water-cooled biomass boiler anti-coking method, and also discloses a device for realizing the method, which belongs to the technical field of boiler manufacturing. Background technique [0002] The existing fixed grate biomass boiler does not have the functions of anti-coking and automatic slagging, and can only be manually coked and slagged regularly, which is labor-intensive; manual coking and slagging can only be performed when the furnace is shut down. Therefore, during the combustion process, the coke blocks will block the air outlet holes on the grate surface, resulting in oxygen-deficient combustion and insufficient fuel combustion. To solve the coking problem, chain grate and reciprocating grate biomass boilers are mostly used. Although they have the functions of decoking and automatic slag removal, the manufacturing process is complicated and the equipment manufacturing cost is very high. It is practical but uneconomic...

AI Technical Summary

Problems solved by technology

[0002] The existing fixed grate biomass boiler does not have the functions of anti-coking and automatic slagging, and can only be manually coked and slagged regularly, which is labor-intensive; manual coking and slagging can only be performed when the furnace is shut down. Therefore, during the combustion process, the coke blocks will block the air outlet holes on the grate surface, resulting in oxygen-deficient combustion and insufficient fuel combustion.

In order to solve the coking problem, chain grate and reciprocating grate biomass boilers are mostly used. Although they have the functions of decoking and automatic slag removal, the manufacturing process is complicated and the equipment manufacturing cost is very high. It is practical but not economical.

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