Air blowing-in device of garbage low-nitrogen and low-dioxin grate incinerator

Abstract

The invention discloses an air blowing-in device of a garbage low-nitrogen and low-dioxin grate incinerator. The air blowing-in device comprises a first passage and an incinerator hearth, wherein the incinerator hearth is arranged at the bottom of the first passage; a first passage ceiling is arranged at the top end of the first passage; four air blowing assemblies are arranged along peripheral walls of the first passage; the distance between each two adjacent air blowing assemblies is 1 / 5 of the height of the first passage; the fourair blowing assemblies are a secondary air assembly, a tertiary air assembly, a quartic air assembly and a quintic air assembly in sequence from bottom to top; air blowing nozzles of the four air blowing assemblies spray air currents obliquely and downwards to compel smoke to rise in a curvilinear way in the first passage; and the rise time of the smoke rising in the curvilinear way in the first passage is long relative to the time consumption of the smoke rising without resistance. Through the smoke staying for a longer time, a condition is created for pollutants such as dioxin, furan and the like to stay for above two seconds at a temperature above 850 DEG C; the most of the dioxin can be burned; the emission of the pollutants can be reduced; the combustion efficiency is improved; and the running cost for garbage disposal is decreased.

Description

technical field [0001] The invention relates to waste incineration treatment equipment, in particular to an air supply device for waste low-nitrogen and low-dioxin grate incinerators. Background technique [0002] Garbage siege is a common problem in Chinese cities. On the one hand, the garbage output is increasing year by year, and on the other hand, the urbanization process is accelerating, and the urban area is constantly expanding, which leads to the extremely serious problem of land for garbage disposal. In large cities such as Beijing, Shanghai, and Guangzhou, it is almost difficult to find suitable land for waste disposal. At the same time, due to the continuous improvement of residents' environmental awareness, more and more attention has been paid to the secondary pollution problems that may be caused by landfills, incineration and other waste treatment facilities. [0003] The flue gas produced by the waste incineration process contains a large number of pollutan...

AI Technical Summary

Problems solved by technology

At present, the staged combustion of municipal solid waste incinerators is along the flow direction of the flue gas in the combustion chamber, and the secondary air (SA) is mainly distributed. It is difficult to control the flue gas temperature and residence time of the flue gas in the first channel.

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