Biological dry type fermentation treatment device for household garbage and crop straws

Abstract

The invention relates to a biological dry type fermentation treatment device for household garbage and crop straws. The device comprises fermentation tanks, a spray pipe, a reflux sewage electric pump, a spray sewage electric pump, a leachate storage tank and a heating coil, wherein a cone-shaped door hole is formed in one end of each fermentation tank while an emptying valve is arranged at the other end of the fermentation tank; a plurality of biogas collecting pipes are communicated with a biogas storage cabinet; the fermentation tank is a dry type fermentation tank, no water is used for fermentation, and no biogas slurry is discharged; the fermentation tank has an arched top to collect biogas conveniently; the dry type fermentation tank is modular and multiple tanks are circularly used to realize continuity of treatment and gas generation of garbage and crop straws; 25-30 days of dry type fermentation is a cycle; through intermediate temperature fermentation at 35-38 DEG C, the hot water coil is used to heat in winter or seasons at low temperatures. Acidified gases are discharged before the gas generation cycle, the hydrogen sulfide content of the biogas generated by dry type fermentation is lower than that of biogas generated in a wet process, and the purity of biogas is high. CH4 is greater than or equal to 65%, and H2S is less than or equal to 12ppm. 120-150 of biogas is generated by mixed raw materials of garbage and straws per ton.

Description

technical field [0001] The invention relates to a domestic garbage and crop straw treatment device, in particular to a device for resource utilization and harmless treatment of methane generated by mixed biological dry anaerobic fermentation of garbage and straw. Background technique [0002] According to reports, as of the end of 2010, the annual removal and transportation of domestic waste in cities across the country was 212 million tons, and the annual waste discharge in rural areas was 300 million tons. The discharge of livestock and poultry manure is about 3 billion tons, and the annual production of crop straw is about 700 million tons. City garbage has been besieged, 19.6% of which is incinerated to generate electricity, and 77% is simply landfilled. The rubbish in the countryside is piled up like a mountain, and the straw is piled up randomly and burned at will, which has not been effectively treated. [0003] At present, 77% of urban domestic waste is landfilled ...

AI Technical Summary

Problems solved by technology

Some treatment technologies are still limited to water washing, pyrolysis, high energy consumption, high water consumption and easy to produce secondary pollution

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