Method for generating methane by using ultrahigh-efficiency fermentation system capable of synchronous counterflow mixing of fermentation biogas slurry

Abstract

The invention discloses a method for generating methane by using an ultrahigh-efficiency fermentation system capable of synchronous counterflow mixing of fermentation biogas slurry, which comprises the following steps: biogas is generated by fermentation in a primary fermentation system and accumulated in a fermentation region which is formed between the side wall of an inlet / outlet charging barrel and the adjacent gas barrier or between the adjacent gas barriers, and finally flows into a secondary fermentation pipeline as the liquid level of the biogas slurry in a first water manifold and a second water manifold rises; biogas is generated by fermentation in a secondary fermentation system and accumulated in a fermentation region which is formed between the side wall of a secondary inlet / outlet charging barrel and the adjacent gas barrier or between the adjacent gas barriers, and firstly flows into a water pressure chamber through a drainage pipe of a bacterium distributor; when the liquid level of the biogas slurry stored in the water pressure chamber achieves the lowest point of the drainage pipe of the discharge pipe, the biogas slurry in the secondary fermentation pipeline flows into the water pressure chamber through the drainage pipe of the discharge pipe; and when the primary fermentation pipeline is used for storing the biogas, the biogas slurry stored in the water pressure chamber flows into the primary fermentation pipeline through a third water manifold and a fourth water manifold.

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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