Domestic garbage incineration, regeneration and utilization process

Abstract

The invention discloses a domestic garbage incineration, regeneration and utilization process including the steps of: 1) crushing and fermenting the garbage and processing a leachate, wherein qualified reclaimed water is used for producing green bodies, sludge is dried and incinerated, and biogas is used for supporting combustion; 2) incinerating the garbage, wherein the coke residue and fly ash after incineration are collected for later use and generated heat energy is used for power generation; 3) employing high-temperature flue gas from a residual heat boiler for drying the green bodies; and 4) mixing the coke residue and fly ash with shale earth, coal gangue and polluted soil from the original domestic garbage landfill, grinding and fining the mixture, producing green bodies and sintering the green bodies in a tunnel kiln at 850-1100 DEG C for 25-28 h. In the coke residue and fly ash, heavy metals are immobilized in bricks and dioxin can be completely decomposed due to continuous high temperature. The process can completely decompose the dioxin and immobilize the heavy metals in bricks and meanwhile generates stable salt minerals, which can be harmlessly recycled, so that the process can avoid cost of landfill, turns wastes into resources, creates values and avoids secondary pollution.

Description

technical field [0001] The invention relates to a domestic waste utilization process, in particular to a domestic waste incineration and recycling process. Background technique [0002] With the continuous acceleration of the urbanization process in my country, the urban domestic waste has increased rapidly with the increase of the urban population. How to completely and harmlessly dispose of municipal solid waste is a difficult problem for people all over the world. At present, the common practice for domestic and foreign disposal of municipal solid waste is landfill or incineration. Domestic waste landfill not only requires a vast site, but also is expensive to landfill, and at the same time, there is a potential danger to the pollution of the surrounding environment and groundwater. The incineration of domestic waste not only detoxifies and reduces the amount of municipal solid waste, but also generates new wastes - coke residue and fly ash produced by incineration, esp...

AI Technical Summary

Problems solved by technology

However, this method requires a great deal of financial, material and manpower to dispose of fly ash, and the disposal costs are expensive.