Method for producing methane in a system with tower-type two-stage linkage fermentation to promote uniform distribution of strains

Abstract

The invention discloses a method for producing methane by using a system used for promoting uniform distribution of strains in a tower-type two-stage linkage fermentation way. The method comprises following steps: fermentation is performed in a first-stage fermentation system to generate methane and the generated methane is accumulated in a fermentation region formed between the side wall of a charge / discharge barrel and an adjacent gas blocking plate or between adjacent gas blocking plates; then, biogas slurry in a first-stage fermentation pipeline is pressed to flow into a first water guide pipe and a second water guide pipe and finally flow into a second-stage fermentation pipeline; methane is produced through fermentation in a second-stage fermentation system, is accumulated in a fermentation region formed between the side wall of a second-stage charge / discharge tube and an adjacent gas blocking plate or between adjacent gas blocking plates and finally flows into a hydraulic pressure room through the second-stage discharge pipe in a unidirectional way.

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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