Household garbage storage pit and leachate collection method thereof

Abstract

The invention discloses a household garbage storage pit and a leachate collection method thereof. The household garbage storage pit comprises a garbage receiving pit, a garbage crushing and dewatering area, a crushed garbage storage pit, a vacuum pump room area and a leachate collecting pool. According to the collecting method, household garbage is unloaded into a garbage receiving pit and converged into a leachate collecting pool through a sloping structure at the bottom; the garbage subjected to water seepage is crushed and then subjected to extrusion dehydration, and percolate enters a percolate collecting pool; the squeezed garbage is distributed in the crushed garbage storage pit, the vacuum pump room area provides negative pressure, and percolate in the garbage flows into the percolate collecting layer at the bottom due to the negative pressure effect and is pumped into the percolate collecting pool after being intensively pumped by the vacuum pump. Three-stage collection of the leachate is completed through gravity seepage, extrusion dehydration and vacuum suction, the solid-liquid separation efficiency of the garbage can be greatly improved, the water content of the garbage is reduced, the heat value of the garbage is improved, meanwhile, the follow-up treatment difficulty is greatly reduced, and the water content of the household garbage can be reduced by 10%-45%.

Description

technical field [0001] The invention belongs to the field of energy saving and environmental protection, in particular to a domestic garbage storage pit and a leachate collection method thereof. Background technique [0002] Most of the domestic waste in my country is mixed collection, which generally has the characteristics of complex configuration, high moisture (40%-60%), and low calorific value (600-1500kcal / kg), and fluctuates greatly with changes in regions, seasons, and economic levels. The high moisture content of domestic waste is not conducive to subsequent pretreatment such as screening and air selection, and more seriously affects its incineration calorific value, resulting in increased disposal difficulty and high disposal costs. It can be said that high moisture content has always been the bottleneck restricting waste disposal. How to effectively discharge leachate during the storage stage of domestic waste, reduce its moisture content, and reduce the difficul...

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Problems solved by technology

[0004] In view of the high moisture content of domestic waste in my country, which restricts subsequent pretreatment and incineration and other disposal processes, resulting in high disposal costs, and the lack of obvious separation effect of landfill leachate in existing patented methods, etc.

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