Multistage linked fermentation system capable of improving biogas slurry turbulence effect

Abstract

The invention discloses a multistage linked fermentation system capable of improving a biogas slurry turbulence effect. The fermentation system comprises a primary fermentation system and a secondary fermentation system, wherein the installation position of the secondary fermentation system is higher than that of the primary fermentation system; the primary fermentation system is connected with the secondary fermentation system by use of a water guide pipe; a water guide pipe is connected between a secondary feed pipe and/or a discharge pipe and a primary fermentation pipeline, and a water guide pipe is also connected between a water pressure chamber and the primary fermentation pipeline. The primary fermentation system adopts an annular fermentation pipeline, so that the fermentation route is long; biogas slurry can be promoted to circularly flow in the system by virtue of the synchronous fermentation of the primary fermentation system and the secondary fermentation system, and therefore, the biogas slurry can be stirred favorably, a bacterial strain can be distributed evenly, and the fermentation efficiency in the system can be improved.

Description

technical field [0001] The invention relates to a biogas fermentation system, in particular to a multistage biogas fermentation system. Background technique [0002] Biogas, the chemical name; methane, as the name implies, is the gas in the swamp; with the development of biogas science and technology in China and the promotion of household biogas in rural areas, according to local use requirements and conditions such as temperature and geology, household biogas pits have fixed arch cover water pressure Type pool, large uncovered hydraulic pool, hanging pipe hydraulic pool, meandering cloth hydraulic pool, top return hydraulic pool, separated floating cover pool, semi-plastic pool, all-plastic pool and tank pool. Although there are various forms, they are generally formed by four basic types of changes: hydraulic biogas digesters, floating cover biogas digesters, semi-plastic biogas digesters and tank-type biogas digesters. [0003] The existing biogas still has many proble...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing biogas fermentation efficiency is low, the biogas convection effect is poor, the fermentation route is short, and the utilization rate of fermentation raw materials is low.

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