Floating cover type dry fermentation biogas digester device

Abstract

The invention discloses a floating cover type dry fermentation biogas digester device. The outer side of a sealed water tank is provided with a thermal insulation layer; the sealed water tank is positioned on the periphery of a dry fermentation tank; a sealed water layer is arranged between the sealed water tank and the dry fermentation tank; a gas storage floating cover is positioned between thesealed water tank and the dry fermentation tank; a gas-guide pipe is arranged in the dry fermentation tank; the lower part of one side of the dry fermentation tank is provided with a discharge port and a tapping control valve; the lower part of the gas storage floating cover is provided with a lower guide branch wheel and a pressure-relief vent; the gas storage floating cover is also provided with a feed port, a viewing port, a biogas pressure gauge, a lifting ring, a primary desulfurizer and an escape pipe; an upper guide support wheel is arranged above the sealed water tank; the bottom in the dry fermentation tank is provided with a drain pipe which is connected with a stirrer in the gas storage floating cover through a circulating mud pump and a hose; and a water outlet pipe is connected with a steam boiler through the circulating mud pump. The floating cover type dry fermentation biogas digester device can control the gas transmission pressure by using the floating cover, can stirfermentation raw materials in operation by using the circulating mud pump and a biogas slurry stirrer, can be used all the year around, and is simple to construct.

Description

technical field [0001] The invention belongs to the field of biogas generators, in particular to a floating cover type dry fermentation biogas tank device. Background technique [0002] The existing biogas digesters are all single fermentation devices. Although the gas storage chamber and the biogas digester are designed as one, the biogas pressure cannot be controlled because the cover of the biogas digester is fixed. If the biogas digester raw materials are often stirred, the biogas output of the biogas digester can be increased by 30%, but the existing biogas digesters cannot be stirred during operation, so the gas production is reduced, thereby reducing the utilization rate of raw materials; There is a lot of material, 8 cubic meters of biogas digesters use 3-3.5 tons of materials and 8-10 tons of water, occupying a large area, complex construction, high requirements for sealing technology, and the pool body often has leaking, leaking, unsafe hidden dangers, and easy Wa...

AI Technical Summary

Problems solved by technology

[0002] The existing biogas digesters are all single fermentation devices. Although the gas storage chamber and the biogas digester are designed as one, the biogas pressure cannot be controlled because the cover of the biogas digester is fixed. If the biogas digester raw materials are often stirred, the biogas output of the biogas digester can be increased by 30%, but the existing biogas digesters cannot be stirred during operation, so the gas production is reduced, thereby reducing the utilization rate of raw materials; There is a lot of material, 8 cubic meters of biogas digesters use 3-3.5 tons of materials and 8-10 tons of water, occupying a large area, complex construction, high requirements for sealing technology, and the pool body often has leaking, leaking, unsafe hidden dangers, and easy Waste ponds are generated; in addition, the existing biogas digesters have the problem that it is easy to feed materials and difficult to discharge materials, because the natural separation of biogas residue liquid cannot be done, the small discharge and large discharge are time-consuming and labor-intensive, and it is easy to cause secondary pollution; biogas The fermentation temperature is above 10°C above zero, and it is difficult for the existing biogas digesters to reach the start-up temperature even in the south in winter, and it is even more difficult to achieve in the three north regions. Therefore, the existing biogas digesters in the south are all buried type It cannot be used throughout the year, and it can only be used for 3 to 4 months in the Sanbei area

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