Pretreatment method of stale refuse

Abstract

The invention discloses a pretreatment method of stale refuse. The pretreatment method comprises the steps that the stale refuse is excavated by an excavator and is transported to a refuse comprehensive treatment plant through a closed refuse transport vehicle to be stacked at the feed position of a plate type feeding machine; the refuse is transported onto the plate type feeding machine through a loading vehicle, and the plate type feeding machine carries out feed on a bar screen through a belt conveyor; the bar screen is used for carrying out screening on the refuse for the first time, and three kinds of refuse different in density or size are separated out; black metal is separated out of screen underflow generated after screening of the bar screen through a magnetic separator; the screen underflow of the bar screen enters a roller screen, and three kinds of refuse different in density or size are separated out; screen overflow of the roller screen is subjected to winnowing; stone is picked out of screen overflow of the bar screen; and inert refuse and combustible refuse are broken. In the implementation process, the whole pretreatment process line operates in a totally closed manner. Reducing, recycling and harmless treatment of the stale refuse is achieved, secondary pollution and potential safety hazards of a refuse landfill, especially an informal landfill, are solved, reutilization of the refuse landfill is achieved, or land is emptied for other use, the whole pretreatment process is carried out in a closed manner, and no secondary pollution exists.

Description

technical field [0001] The invention relates to a pretreatment technology for general solid waste and municipal domestic garbage, in particular to a pretreatment method for stale garbage. Background technique [0002] Landfill waste, also known as mineralized waste, refers to waste that has been buried in landfills for many years, basically stabilized, and can be mined and utilized. The main components of garbage include: stable inert garbage (stones, glass, etc.), biodegradable organic matter (rubber, plastic film, etc.), a small amount of metal, and most of the rest are humus. Since the 1970s, my country has gradually begun to adopt landfill as a method of municipal solid waste disposal. Landfill is still the main way of disposing of municipal solid waste in my country. According to the statistics of municipal solid waste disposal in 2013, the use of landfill to dispose of municipal solid waste accounted for 60.61% of the total waste removal volume, and 11% was stacked a...

AI Technical Summary

Problems solved by technology

[0005] (2) The urban area continues to expand to the surrounding suburbs, and it is becoming more and more difficult to select landfill sites. Many landfill sites are overloaded. For example, Guangzhou Xingfeng has a design processing capacity of 2000-4500t / d and an actual processing capacity of 6000 -8000t / d, overloaded by 200%; the first phase of Shanghai Laogang is overloaded by 33%, and landfills such as Beijing Gaoantun, Beijing Asuwei, Wuhan Chenjiachong are all overloaded; these all lead to rapid consumption of storage capacity But facing the problem of closure;

Most of these landfills are built along the terrain, without formal anti-seepage treatment and landfill treatment, with weak anti-pollution ability, causing secondary pollution to groundwater, soil, atmosphere, and surrounding environment, and occupying a large amount of land resources

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