Water circulation system of single-drum four-return-stroke biomass burning corner tube boiler

Abstract

The invention discloses a water circulation system of a single-drum four-return-stroke biomass burning corner tube boiler. The water circulation system comprises a drum, a boiler body and a water circulation mechanism, wherein the two ends of the water circulation mechanism are connected to an inlet and an outlet of the drum. The boiler body comprises a hearth, a membrane type wall cavity and a flag type heating surface cavity which are sequentially arranged from front to back, the hearth communicates with the upper end of the membrane type wall cavity, and the membrane type wall cavity communicates with the lower end of the flag type heating surface cavity; and the side walls of the hearth, the membrane type wall cavity and the flag type heating surface cavity are membrane type walls, andthe upper ends and the lower ends of the side walls of the hearth, the membrane type wall cavity and the flag type heating surface cavity communicate with the water circulation mechanism. According to the boiler water circulation system, the single drum is used for conducting water supply circulation on the four-return-stroke burning boiler, and a heat exchange environment is provided.

Description

technical field [0001] The invention relates to a water circulation system of a single-drum four-pass biomass-fired corner tube boiler. Background technique [0002] Biomass fuel is a compact cylindrical fuel with a length of 5-30mm that uses lignin as a binder to compress loose straw, branches and wood chips and other agricultural and forestry biomass under a certain temperature and pressure. Biomass pellet fuel is a renewable carbon source, which has the characteristics of wide sources, good combustion performance, less harmful gas emissions, and relatively low price. The amount is reduced, the combustion characteristics are obviously improved, and the utilization efficiency is significantly improved. Therefore, with the increasingly stringent national environmental protection policies, replacing other fossil fuels with biomass fuels is one of the effective ways to achieve energy conservation and emission reduction. [0003] Biomass fuel has high water content and high d...

AI Technical Summary

Problems solved by technology

Therefore, the unstable operation of the boiler, insufficient combustion, serious coking, and corrosion of the heating surface have become problems that need to be solved urgently.

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