Domestic waste and straw reutilization comprehensive system

Abstract

The invention relates to a domestic waste and straw reutilization comprehensive system. The system comprises a waste crushing separator, a straw crushing machine, a steam ejection type organic waste processing unit, a waste organic slurry drying device, a fertilizing device, a straw organic slurry storage tank and a methane production device, wherein the steam ejection type organic waste processing unit is connected with the waste organic slurry drying device and the straw organic slurry storage tank respectively; the waste organic slurry drying device is connected with the fertilizing device through a conveying belt; the straw organic slurry storage tank is connected with the methane production device; a solid outlet of the methane production device is connected with the waste organic slurry drying device. The cost of the system is low; the system can quickly and effectively make domestic waste and straws into fertilizers, and simultaneously produces natural gas, carbon dioxide and the like; the energy consumption expenses are reduced, and waste organic matters and straw organic matters are jointly used as the fertilizing material so that the production of high-quality organic fertilizers is guaranteed.

Description

technical field [0001] The invention belongs to the field of garbage and straw recycling, in particular to a comprehensive system for domestic garbage and straw recycling. Background technique [0002] With the rapid development of social economy and the continuous improvement of people's living standards, environmental problems have attracted more and more attention, among which the resource treatment of domestic waste is particularly important. Existing garbage disposal methods mainly include three categories: sanitary landfill, composting and fermentation, and incineration for power generation. These three waste disposal methods all have certain problems: among them, sanitary landfill occupies a large amount of land, produces serious odor, pollutes the air, leachate pollutes soil and groundwater resources, breeds bacteria and viruses, and the overall decomposition time is as long as a hundred years. Composting fermentation pollutes the air and produces a high concentrati...

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Problems solved by technology

These three garbage disposal methods all have certain problems: Among them, sanitary landfill occupies a large amount of land, produces serious odor, pollutes air, leachate pollutes soil and groundwater resources, breeds bacteria and viruses, and the overall decomposition time is as long as a hundred years

The front-end treatment of incineration power generation has odor pollution. The highly toxic substance dioxin is produced during the incineration stage. The incineration residue contains a large amount of heavy metals, and the particles produced affect the air quality. Recycling of all waste resources cannot be realized

At the same time, there is a large amount of crop residues in my country every year. The data of straw alone in 2008 shows that about 213 million tons of residues have not been used, and a large amount of straw is directly burned, which not only has low efficiency, but also seriously affects air quality, causing severe environmental pollution

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