Municipal solid waste compressive classification treatment method

Abstract

The invention provides a municipal solid waste compressive classification treatment method. The method comprises the following steps of: crushing: carrying out crushing treatment on the high humidity mixed waste; magnetic separation: sorting the matters which can be magnetically adsorbed through magnetic adsorption; water flotation: transporting the residues after magnetic selection treatment into a flotation tank, and with matching of stirring, dividing the materials into two layers, wherein the upper plastic wood materials are blown out from an upper discharge hole; and the bottom deposited materials are discharged from the bottom; and organic matter and landfill material separation: feeding the matters discharged from the bottom of the flotation tank into a high-speed wet type stirrer to undergo beating treatment so that the materials are divided into two layers, wherein the upper materials are slurry which mainly comprises degradable organic matters and is output by a slurry pump to be used for producing biogas; and the bottom materials are discharged via a gate valve to undergo landfill treatment. The method has the following beneficial effects that: firstly the municipal solid waste undergoes mechanical crushing and then the matters which can be magnetically adsorbed, the plastic wood raw materials, the organic matters which can be used for producing biogas and the landfill materials are separated from the municipal solid waste in sequence, thus effectively utilizing the useful components.

Description

technical field [0001] The invention relates to the technical field of environmental sanitation, in particular to a method for comprehensive classification and treatment of municipal solid waste. Background technique [0002] With the rapid development of the urbanization process, the disposal of municipal solid waste has become a difficult problem that restricts the promotion of the image and sustainable development of cities. At present, domestic conventional waste disposal methods mainly include landfill, composting and incineration. The shortcomings of various methods are obvious, for example: the landfill method has the defects of polluting the environment and occupying a large amount of land resources, and its applicable value gradually decreases; the composting process of the composting method is difficult to control, and the risk of secondary pollution to the environment is relatively high Factors such as incomplete utilization of organic matter, complex fertilizer ...

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Problems solved by technology

[0006] 3. Irregular bagged reception, garbage form, and uneven calorific value: Almost all household garbage in domestic cities is received in unsorted bags. The components of garbage are extremely complex, and their physical form, calorific value, distribution space, and chemical form Average difference is large

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