Secondary anaerobic fermentation and power generation system for large-middle scale biogas engineering

Abstract

The invention discloses a secondary anaerobic fermentation and power generation system for large-middle scale biogas engineering, which belongs to a biogas production device. The invention aims to provide a biogas production system which can be used for centralized power generation. The system comprises a pretreatment tank, a primary fermentation tank, a secondary fermentation tank and a biogas residue tank; the pretreatment tank (16) is communicated with a USR reactor (14) through a feeding pipe (15), the USR reactor is communicated with the secondary fermentation tank (10) through an overflow pipe (21) and a gas conduit (2), and the USR reactor (14) and the secondary fermentation tank (10) are communicated with the biogas residue tank (11) through a residue discharge pipe (12) respectively; and the secondary fermentation tank supplies biogas for a generator through a biogas purification device (3). The system realizes the conversion of biogas fermentation from a small-scale production mode to a centralized high-efficiency large-scale mode, and has the advantages of low cost, high efficiency of wastewater treatment, high gas yield and the like; and the system can be matched with large-scale livestock and poultry farms for construction, thereby achieving the aims of saving energy sources, reducing the emission, and protecting the agricultural ecological balance.

Description

Technical field: [0001] The invention relates to a biogas production system, in particular to a secondary anaerobic fermentation system providing gas source for a biogas generator. Background technique: [0002] With the rapid development of animal husbandry, the scale of livestock and poultry breeding continues to expand, and the excrement and other wastes discharged by livestock and poultry farms are increasing day by day, which not only causes serious environmental pollution, but also easily causes livestock and poultry diseases, which restricts the development of livestock and poultry farms. development; if a biogas project can be built near the farm, it can not only effectively solve the problems of fuel and fertilizer, but also provide an effective way for livestock and poultry farms to scientifically treat manure. At present, most of the widely used biogas production equipment are household biogas digesters, which have the disadvantages of wide distribution, small sca...

AI Technical Summary

Problems solved by technology

At present, most of the widely used biogas production equipment are household biogas digesters, which have the disadvantages of wide distribution, small scale, and low gas production rate, which cannot meet the requirements of intensive large-scale production

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