Biogas power generation system

Abstract

The invention discloses a biogas power generation system, which comprises a biogas preparing and purifying system, a biogas engine, an electric generator and a waste heat recovery device, wherein the biogas preparing and purifying system is composed of crushing equipment, homogenizing equipment, hydrolysis equipment, a first fermentation tank, a second fermentation tank, a biogas recovery device and a solid-liquid separating device. The crushing equipment and the homogenizing equipment are connected; the homogenizing equipment and the hydrolysis equipment are connected; the hydrolysis equipment and the first fermentation tank are connected; the first fermentation tank is additionally connected to the second fermentation tank; the biogas recovery device is connected to the first fermentation tank, the second fermentation tank and the biogas engine; the biogas engine is connected to the electric generator and the waste heat recovery device; and the solid-liquid separating device is connected to the first fermentation tank, the second fermentation tank and the hydrolysis equipment. Stable biogas, from which hydrogen sulfide, carbon dioxide and water are removed, is outputted to the biogas engine from the biogas preparing and purifying system in the biogas power generation system, so that the biogas engine can work stably by virtue of the biogas provided by the biogas recovery device and the electric generator can be driven to stably work to generate electric energy.

Description

technical field [0001] The invention relates to the technical field of biomass fuel power generation, in particular to a biogas power generation system. Background technique [0002] Energy crisis and ecological crisis are huge problems that human society is facing at present. To solve the above problems, technologies that use natural energy to generate electricity have emerged: such as solar power generation, wind power generators, and biomass-to-marsh power generation. [0003] Among them, biomass biogas power generation is a very effective technology for controlling organic waste pollution and developing renewable energy. Biogas is a mixed gas produced by fermentation, decomposition, and transformation of various organic substances such as human and animal manure, straw, and sewage under anaerobic conditions. Fermentation is a complex biochemical change involving many microorganisms. The reaction is roughly divided into two stages: (1) Microbes degrade carbohydrates, fa...

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Problems solved by technology

[0004] Traditional biogas fermentation devices generally include hydraulic biogas digesters, floating hood biogas digesters, etc. Fermentation raw materials enter the anaerobic fermentation gas production chamber in a static state or in partial dynamic series, and there are technologies with unstable gas production and low efficiency problems, which eventually lead to unstable power generation of biogas generators

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