A self-insulating biogas digester and its operating method

Abstract

The invention discloses a self-insulating biogas digester and its operation method, comprising a material reaction room, a discharge room and a hollow gas storage interlayer wrapped outside the material reaction room; the material reaction room and the bottom of the hollow gas storage interlayer There is a rigid support structure in the room; the feed pipe runs through the hollow gas storage interlayer and leads to the inside of the material reaction room; the top of the material reaction room is provided with an air guide pipe inlet; the lower part of the material reaction room is provided with a discharge pipe, and the discharge pipe is connected to the outlet The material is connected; it also includes a water collection pipe located in the hollow gas storage interlayer; a biogas delivery pipe is also arranged on the top of the hollow gas storage interlayer. The invention makes full use of the biogas of the system itself for heat insulation, which effectively reduces heat loss and improves the stability of the fermentation process of the system; the generated biogas undergoes gravity dehydration by itself during the storage process, so that the water content of the transported biogas Low.

Description

technical field [0001] The invention belongs to the technical field of biogas production equipment, in particular to a self-insulating biogas digester and its operating method. Background technique [0002] Biogas digesters are a commonly used treatment method for living and breeding waste in rural areas of our country. The main principle is to discharge the manure generated in the process of living and breeding into the biogas digester for fermentation, degrade the toxic and harmful substances in it, and produce usable The clean energy used is biogas, and the degraded biogas residue can be used as organic fertilizer. Biogas technology is green and environmentally friendly, does not produce secondary pollution, and can effectively alleviate the energy shortage in some rural areas. It is one of the technologies vigorously promoted by the Chinese government. [0003] Although our country has made a lot of research progress in this area in recent years, for example, the Chines...

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Problems solved by technology

[0004] However, the fermentation efficiency of biogas digesters is low when the ambient temperature is low. Although manual or boiler heating is often used for heat preservation, this heat preservation method consumes energy and increases labor costs.

At the same time, the water content of the biogas produced by the current biogas digester is relatively high, which not only increases the workload of the subsequent dehydration facilities, but also affects the desulfurization effect of the desulfurizer. These problems limit the application of the current biogas digester and need to be improved

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