Fermentation raw material pretreatment method for large-scale biogas project, and apparatus thereof

Abstract

The present invention discloses a fermentation raw material pretreatment method for a large-scale biogas project, and an apparatus thereof. According to the present invention, the fermentation raw material is subjected to density difference separation by the swirling flow hydraulic action, such that the material liquid is at the three phase stratified state, wherein the three phases comprise a light mass phase, a middle mass phase and a heavy mass phase; the light mass phase flows to a scum sorting machine to carry out primary cutting and crushing, and then enters a middle mass phase layer ofa striping separator; the heavy mass phase layer materials are removed by a sand settling separator; the middle mass phase layer material liquid is blended to the proper material concentration, and then enters a material mixing crusher, wherein the middle and short fiber materials in the material are subjected to the secondary complete crushing, and are pumped to an anaerobic reactor from a unit material discharge machine. The apparatus comprises a receiving device, a stripping mixer, a circulation tank, the scum sorting machine, a suspension cutting machine, the sand settling separator, a circulation mixer, the material mixing crusher and the unit material discharge machine. With the present invention, a plurality of organic wastes, sludge of the sewage plant, and other fermentable materials can be simultaneously treated, the solid content of the treated material can be 8-15%, the volumetric biogas production rate of the anaerobic reactor can be increased by 10-15%.

Description

technical field [0001] The present invention relates to a raw material pretreatment method and device for large-scale biogas projects, in particular to a kind of mixed raw materials used in biogas projects, such as livestock and poultry manure, sludge, domestic organic waste, straw, weeds and other fermentable materials Pretreatment method and device. Background technique [0002] With the adjustment of the rural industrial structure, the rural farming and breeding industry has developed rapidly. While increasing agricultural income, the rural non-point source pollution has become increasingly serious, especially organic waste such as livestock and poultry manure, rural domestic garbage, straw, weeds, and sewage. The pollution problem caused by factory sludge has become more and more prominent. Under the new situation of building a new socialist countryside in an all-round way, large-scale biogas projects play an important role in solving the pollution caused by large-scale...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to avoid the limitations of the types and sources of fermentation raw materials due to the single technology of fermentation raw material pretreatment equipment in traditional large-scale biogas projects, and at the same time prevent the fermentation raw materials from clogging the pipeline and rising to the liquid surface after entering the anaerobic reactor It is conducive to the rapid digestion of straw materials, ensures the gas production efficiency and gas production stability of the anaerobic reactor, and provides a fermentation raw material pretreatment device suitable for large-scale biogas projects.

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