System and method for pre-treating household garbage on basis of high-pressure extrusion

Abstract

The invention discloses a system and a method for pre-treating household garbage on the basis of high-pressure extrusion. The system is formed through connecting a garbage grabbing bucket, a stock bin, a chain conveyer, a first belt conveyor, a bag-breaking screening machine, a second belt conveyor, a third belt conveyor, a charge buffer bin, a high-pressure extruder, a fourth belt conveyor, a dry garbage sorting sub-system and a spiral conveyer. The household garbage is subjected to bag-breaking screening treatment and high-pressure extrusion dry-wet separation, then subjected to sorting treatment, and finally sorted into five classes, that is, plastic garbage, metal garbage, building garbage, combustible garbage and organic garbage; and high-pressure extrusion equipment has a superhigh extrusion force, is applicable to dry-wet separation for the household garbage which is subjected to crushing treatment, and adopts a specific mechanism with a short extrusion stroke, a compact extrusion process and high running efficiency. The system and the method have a good garbage pre-treatment effect, and the sorted garbage is high in quality; and moreover, the treatment process is rapid and thorough, the automation degree is high, and the energy consumption level is low.

Description

Technical field [0001] The invention relates to the field of domestic waste treatment, in particular to a domestic waste pretreatment system and method based on high-pressure extrusion. Background technique [0002] Relying on pretreatment equipment to achieve the sorting effect of domestic waste, using pretreatment as a pre-process of incineration, landfill or composting, is currently a relatively common way to treat domestic waste in my country. Commonly used pretreatment equipment mainly includes crusher, drum screen, winnowing equipment, vibrating screen, magnetic separator, etc. For waste incineration, the pretreatment process can remove inorganic non-combustible components such as slag and increase the calorific value of the waste; for composting, the pretreatment process can remove non-compostable inorganic substances such as metal, plastic, glass, lime, and stones. Separated, thereby increasing the content of organic matter in the waste and reducing the content of impuri...

AI Technical Summary

Problems solved by technology

[0003] However, due to the characteristics of domestic waste in our country, the sorting effect of the above-mentioned pretreatment is poor, which is manifested in the following aspects: (1) The waste has a high moisture content, mixed dry and wet, and the phenomenon of large bags with small bags is serious, which seriously affects the sorting effect; (2) The system is huge, the construction cost is high, the overall energy consumption is high, and the operation and maintenance cost is high; (3) Noise, odor, sewage and dust pollution are serious; (4) Manual auxiliary sorting is necessary, and the working environment is harsh

For a long time, the above problems have not been overcome, and the garbage pretreatment has been at a low level

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