Gasification incinerator suitable for high calorific value domestic waste

Abstract

The invention provides a gasifying incinerator applicable to household garbage with high heat value. The gasifying incinerator is divided into a gasifying chamber and a secondary combusting chamber, wherein a horizontal grate is arranged at the bottom of the gasifying chamber, and a primary air bin is arranged at the bottom of the grate; the secondary combusting chamber is formed above the gasifying chamber, and secondary air and circulatory flue gas enter a hearth from the side surface of the secondary combusting chamber respectively to promote burn-out of combustible gas in the secondary combusting chamber and reduce the overall temperature of the secondary combusting chamber. The gasifying incinerator can effectively overcome various defects caused by a traditional household garbage incineration way and has the advantages that bottom ash has low carbon content, NOx emission is ultralow, concentration of fly ash is ultralow and the like, a flue gas treatment system is simplified, and investment cost and operation cost are reduced greatly.

Description

technical field [0001] The invention relates to the field of garbage incineration, in particular to a gasification incinerator suitable for domestic garbage with high calorific value. Background technique [0002] In recent years, more and more attention has been paid to waste incineration as a mainstream domestic waste treatment measure at home and abroad, and the share of waste incineration has also increased year by year. With the strengthening of the public's awareness of environmental protection, the government's requirements for waste incineration flue gas emissions have gradually become stricter, and the traditional incineration mode has gradually exposed its drawbacks, that is, the cost of flue gas treatment is getting higher and higher due to the high concentration of pollutants in the flue gas. , the frequent dust and coking process in the furnace affects the reliability of the unit operation, and the development of waste cleaning treatment technology that can meet...

AI Technical Summary

Problems solved by technology

For grate furnaces with relatively mature technology, due to the direct incineration process and the large primary air volume, which often accounts for 70% of the total air volume, more NOx is produced during the incineration process, resulting in a complex flue gas treatment system. The cost is high, and there are problems such as large amount of fly ash, ash accumulation in the furnace, coking and severe high-temperature corrosion, which reduce the reliability of equipment operation

Circulating fluidized bed boilers use inert bed materials to fluidize domestic waste, which has the advantages of low incineration temperature, small NOx concentration generation, and high burnout rate. However, high flue gas dust concentration and high equipment failure rate limit its large-scale application. application

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