Slag burnout system and method of biomass boiler

Abstract

The invention discloses a slag burnout system and method of a biomass boiler. The slag burnout system comprises a boiler body, a cyclone separator, an ash cooling air pipeline and denitration equipment, wherein a water cooling wall and a first superheater are arranged in the boiler body; an inlet of the cyclone separator communicates with an exhaust port of the boiler body; a slag outlet of the cyclone separator communicates with a first necking structure of the boiler body through a return pipeline; an air outlet of the cyclone separator communicates with a flue gas pipeline; a second superheater, a coal economizer and an air preheater are sequentially arranged in the flue gas pipeline in the flue gas flowing direction; an inlet of the air preheater communicates with an air feeder throughan air feeding pipeline; and an outlet of the air preheater communicates with a primary air pipeline and a secondary air pipeline. According to the slag burnout system and method, through circulatingfluidization and keeping of upward ash cooling air in a slag well, boiler ash can be fully burnt out, sensible heat of the ash is fully utilized, the boiler efficiency can be improved, and ash deposition corrosion is reduced.

Description

technical field [0001] The invention belongs to the technical field of biomass fuel combustion and environmental pollution discharge, and in particular relates to a slag burnout system and method for a biomass boiler. Background technique [0002] At present, the use of renewable energy is vigorously advocated, and biomass power generation is the key development direction of bioenergy, and biomass power plants are being vigorously built in various places. Biomass direct combustion power generation refers to the use of biomass boilers to use the heat energy of directly burning biomass to produce steam, and then promote the steam turbine system to generate electricity. Because of its near-zero emissions and economic and social advantages such as benefiting farmers, it has developed into the most mature biomass energy. And the most promising way of application value; Among them, the technology of biomass grate boiler is mature, the application scale is large, and the market sha...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a slag burnout system and method for a biomass boiler to solve the problem that the amount of ash and slag in the current biomass boiler is large and scattered in the furnace and flue and is not easy to collect, and the waste heat of the ash and slag is high and the thermal efficiency is low. And the technical problem of soot deposition and corrosion in the tail flue

Images