Municipal garbage wet type process treatment method

Abstract

The invention provides a municipal garbage wet type process treatment method. According to the method, garbage is crushed and then conveyed to a washing tank to be washed; sediment is sent to a sorting machine to be crushed and washed to separate out inorganic residues; garbage washing liquid and floating substances on the washing tank are both conveyed into a grinding machine; ground materials are washed and sieved; an oversize product is dried and fed into a mixer, and an undersize product is sent into a mixing and conditioning tank; when the water quality and temperature meet the requirements, the mixture in the mixing and conditioning tank is fed into an anaerobic digestion tank to generate biogas, biogas fluid and biogas residues; the biogas residues are dewatered and dried and are conveyed into a pyrolysis drum together with the dried oversize product; and thermal cracked fuel gas of which tar is removed and the biogas are both fed into a fuel gas collection and utilization system. Through the municipal garbage wet type process treatment method, harmless, quantity reducing and recycling treatment of garbage is realized, and the recycling comprehensive utilization rate of thegarbage is increased.

Description

technical field [0001] The invention relates to a waste treatment technology, in particular to a wet treatment process of municipal solid waste. Background technique [0002] At present, there are three main ways to deal with domestic waste in countries around the world: landfill, incineration and composting. Landfill treatment takes up a lot of land, emits greenhouse gases, and discharges leachate for a long time. Its treatment is also a problem. If it is not handled properly, it will pollute surface water or groundwater. Although incineration is a thorough stabilization and harmless treatment, it requires It consumes a lot of primary energy, and emits dioxins and greenhouse gases. The operating cost is relatively high, and it generally requires incentive policies to operate; composting is limited to garbage that meets the relevant indicators. [0003] These three processes, which can be called "dry" or "semi-dry" processes, do not add water to the waste, but reduce the mo...

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Problems solved by technology

[0006] The above-mentioned two documents are all involved in the "dry" process of waste treatment, and both of them have the defect that the comprehensive utilization rate of waste resources is not high

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