Comprehensive treatment technique for town domestic waste

Abstract

The invention discloses a comprehensive treatment technique for town domestic waste. The technique comprises the following steps that (1), the municipal solid waste is sent into a trommel sieve after being subjected to coarse breaking and bag breaking, and sand containing organics and waste are subjected to preliminary separation; (2), the preliminarily separated domestic waste obtained in the step (1) is sent to an integration comprehensive sorting machine, firstly, first air sorting is conducted to separate iron blocks, bricks and glass bottles from the domestic waste, then vibration screening is conducted, residual sand containing organics in the domestic waste is screened out, and then second air sorting is conducted to separate the organic fruits from the domestic waste, the domestic waste subjected to integration comprehensive sorting is obtained; and (3), the domestic waste subjected to integration comprehensive sorting and obtained in the step (2) is sent to a fine crusher to be crushed, then second iron removing is conducted, and fine domestic waste is obtained and subjected to compression forming. The treatment technique is low in treatment cost, high in resource using efficiency, economical and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a comprehensive treatment process for urban domestic garbage. Background technique [0002] At present, the treatment of urban domestic waste can usually be divided into comprehensive waste sorting and composting, waste pyrolysis incineration, waste landfill, and waste incineration for power generation. However, the above methods have the following shortcomings: [0003] (1) Comprehensive sorting and composting of waste: Since the domestic waste classification is basically not implemented at the source, the composition of the waste is complex, and it is difficult and costly to truly realize the sorting of the available things in the domestic waste. Except for metals, other sorting materials have low recycling value as waste products. In composting treatment, since the domestic garbage contains fine glass, batteries, iron filings, heavy metal substances, etc., which ca...

AI Technical Summary

Problems solved by technology

[0003] (1) Comprehensive sorting and composting of garbage: Since domestic garbage is basically not implemented at the source, the components in the garbage are complicated, and it is difficult and costly to truly sort out the usable things from household garbage; Except for metals, other sorting materials have low recycling value as waste products

Composting treatment, because domestic waste contains fine glass, batteries, iron filings, heavy metals, etc., which cannot be extracted, so the sorted undersize is used as biological fertilizer, which has low utilization value

[0004] (2) Garbage pyrolysis and incineration technology: This technology is mostly used in the treatment of high calorific value waste, such as medical waste, waste tires, etc.; in the treatment of urban domestic waste, due to the small scale, the heat generated after pyrolysis and incineration cannot be used normally. Many are directly exhausted to the atmosphere, and the flue gas treatment after pyrolysis requires a large investment and high operating costs; in addition, due to the complex composition of waste, incomplete pyrolysis is prone to secondary pollution

[0005] (3) Garbage landfill treatment: Due to irregularities in old landfills at the county level and below, it is difficult to select a new landfill site, and there are long-term risks and hidden dangers of groundwater pollution

[0006] (4) Garbage incineration power generation: in towns below the county level, the amount of garbage is generally less than 300 tons. To build a separate incineration power plant, there are problems such as difficult site selection, large investment per ton of garbage, poor economic and social benefits, etc.

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