Dry-wet-coupled marsh gas fermentation device

Abstract

The invention discloses a dry-wet-coupled marsh gas fermentation device which comprises a dry fermentation tank and a wet fermentation tank, which the wet fermentation tank is positioned in the dry fermentation tank; the dry fermentation tank is provided with a dry fermentation tank gas valve, a dry tank feed port and a slag discharge port; the bottom of the dry fermentation tank is provided with a liquid return pipe leading to the upper part of the dry fermentation tank; the liquid return pipe is provided with a percolate back-ejection pump; the liquid return pipe is provided with a sprayer; the bottom of the dry fermentation tank is provided with a hard see-through lining board; the hard see-through lining board divides the dry fermentation into an upper gas chamber and a lower gas chamber which are respectively arranged at the upper part and the lower part; a dry tank circulating pipe and a wet tank circulating pipe which are penetrated through the hard see-through lining board are arranged in the dry fermentation tank; the upper end of the dry tank circulating pipe is positioned in the upper gas chamber, and the lower end is positioned in the lower gas chamber; the upper end of the wet tank circulating pipe is positioned in the wet fermentation tank, and the lower end is positioned in the lower gas chamber; and the wet fermentation tank is provided with a wet tank feed port and a mixer shaft device. According to the invention, the fermentation temperature of the whole fermentation process is stable, the gas production rate per unit mass of raw material can be increased, the volume gas production rate of a reactor can be increased, and the fermentation period of the reactor can be shortened.

Description

technical field [0001] The invention belongs to the technical field of biogas fermentation engineering, in particular to a dry-wet coupling biogas fermentation device. Background technique [0002] Over the years, the Chinese government has promulgated a series of policies, measures and laws and regulations, taking the development of biomass energy focusing on biogas as an important measure to do practical things for the people, develop circular agriculture and build a new socialist countryside, further increase capital investment, and obtain It has achieved remarkable economic, ecological and social benefits, and has become one of the livelihood projects and energy-saving and emission-reduction actions that benefit the most people in the world. [0003] At present, household biogas, small joint household biogas, small-scale biogas projects, medium-sized biogas projects, large-scale biogas projects and extra-large biogas projects have been fully developed. The application f...

AI Technical Summary

Problems solved by technology

The main problem of the separate dry-wet combined fermentation is that multiple reactors need to be installed, and the investment cost is too high; the integrated dry-wet combined fermentation suspends the straw on the top of the reactor, the biogas slurry is in the lower layer of the reactor, and the straw and the biogas slurry are in the middle of the reactor. In the same reactor, it is easy to cause crust to block the reactor

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