Process for comprehensively treating municipal domestic wastes

Abstract

The invention discloses a waste treating process which makes municipal domestic wastes become clean and innocent and completely treated and can effectively prevent dioxin from being synthesized and a comprehensive utilization method for circularly generating power by using the wastes. The method mainly comprises a pretreatment and wet decomposing step, a sorting step, a pyrolysis gasification step, a tail gas and sewage treatment step and a power generation and output step. In a pretreatment and wet decomposing reaction of the domestic wastes, effects of dehydration, debenzolization, dechloridation and the like are achieved, the dioxin is effectively prevented from being generated, and the treatment time is much shorter than that of the conventional process; puffy wastes generated in the pretreatment and wet decomposing step have combustibility, and the calorific values of the wastes reach 1,800 to 2,300 kilocalories; and compared with those of the conventional burning process, auxiliary fuels are not required to be added in the post pyrolysis gasification process, so that the combustion cost is reduced. By the process, the municipal domestic wastes with extremely high water content can be treated, so that the accepted problem of difficulty in treatment of the domestic wastes is actually solved.

Description

technical field [0001] The invention relates to a comprehensive treatment process of municipal domestic garbage. Background technique [0002] Household garbage has become a recognized environmental hazard, and it is a recognized problem at home and abroad that the environmental protection industry has not completely broken through the technical bottleneck. Although there are many existing treatment methods, they are not ideal and there are many hidden dangers. At present, the methods commonly used for garbage at home and abroad mainly include: ordinary incineration method, landfill method, composting method, pyrolysis incineration method, plasma thermal melting method, sorting method, etc., and their existing defects are as follows: [0003] 1) Incineration method: [0004] The incineration method has a large investment, and the emission of flue gas still pollutes the environment. According to many years of experience abroad, although the exhaust pollutants meet the envir...

AI Technical Summary

Problems solved by technology

However, due to China's national conditions, the proportion of organic waste is as high as 60%, so the general sorting method cannot completely solve the problem of domestic waste. In addition, the working conditions of sorting are poor, which affects the health of workers

[0011] Therefore in sum all above-mentioned various treatment methods, all also do not propose a kind of clean and harmless, effectively prevent synthetic dioxin comprehensive domestic garbage treatment process

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