Firedamp biphasic anaerobic fermentation gas stirring system

Abstract

The invention relates to a methane two-phase anaerobic fermentation gas mixing system, which belongs to a methane generator. A gas returning pipe and a gas inlet pipe are connected and installed between a hydrolytic acidification tank and a gas production tank, the both ends of the gas returning pipe are respectively connected with the upper part of the hydrolytic acidification tank and the lower part of the gas production tank, the both ends of the gas inlet pipe are respectively connected with the lower part of the hydrolytic acidification tank and the upper part of the gas production tank; an air pump and a one-way valve are arranged on the gas inlet pipe; and a normally open solenoid valve is installed on a gas collector, and is positioned at the gas collector position between the hydrolytic acidification tank and the gas production tank. The system has the advantages that the structure is simple, the operation is convenient, the running is stable, the gas production process is smooth, the gas production rate is high, and the quality is good.

Description

technical field [0001] The invention belongs to biogas generating equipment, and mainly relates to a gas stirring system for two-phase anaerobic fermentation of bioenergy biogas. Background technique [0002] Energy and environmental issues have become two prominent issues in today's society. Under the circumstances of decreasing non-renewable energy sources and increasing costs, people began to maximize the use of biomass resources to supplement energy shortages, and they can use biomass resources At the same time, it eliminates pollution to the environment, and anaerobic fermentation is a technology that can turn agricultural and animal husbandry waste into energy and perform harmless treatment. Therefore, in order to improve the efficiency and stability of the anaerobic fermentation system, various methods and measures have been studied. At present, the anaerobic fermentation technology used mainly includes single-phase anaerobic fermentation technology and two-phase ana...

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Problems solved by technology

At present, the anaerobic fermentation technology used mainly includes single-phase anaerobic fermentation technology and two-phase anaerobic fermentation technology. Compared with single-phase anaerobic fermentation technology, two-phase anaerobic fermentation technology has faster fermentation speed and stable system operation. and other advantages, but this process also has some problems to be solved urgently. For example, in the existing two-phase anaerobic fermentation system, due to the simple direct connection of pipelines between the hydrolysis acidification tank, the gas production tank and the gas collection tank structure, that is, the hydrolytic acidification tank, gas production tank, and gas collection tank are connected by the same pipeline. The hydrolytic acidification process in the hydrolytic acidification tank will generate a large amount of hydrogen, and the methanogenic bacteria in the hydrolysis acidification tank are very few. The generated hydrogen degradation is very small, which gradually increases the hydrogen partial pressure in the hydrolytic acidification tank, and the increase of hydrogen partial pressure directly leads to the accumulation of propionic acid, which in turn affects the stability of the hydrolytic acidification tank and the subsequent methane production process. In addition, during the fermentation process, in order to make the fermentation material fully contact with the bacteria and prevent the top of the fermentation material from crusting, it is necessary to regularly stir the materials in the hydrolysis acidification tank and the gas production tank, and the operation process is complicated.

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