Constant-pressure methane storage tank

Abstract

The invention discloses a constant-pressure methane storage tank comprising a support, a tank body and a reservoir. A certain amount of water is contained in the reservoir, two observation holes are formed in the bottom of the reservoir, a gas inlet pipe and a gas outlet pipe penetrate out respectively via the observation holes after passing through water, the support is fixed over the reservoir, the tank body is arranged in the reservoir in an upside down manner, an enclosed space formed between the tank body and the water surface is a gas storage chamber, the bottom surface of the tank body is provided with a plurality of counterweights, and an overflow gas pipe penetrates the bottom surface of the tank body and communicated with the outside through the overflow gas pipe. The buoyancy principle is utilized, the counterweights are increased and decreased according to a set pressure value, gravity of the counterweights is kept equal to methane pressure in the gas storage chamber, pressure of the methane is regulated automatically and quite accurately, the problem of storage of the methane generated by the methane tank is solved, and the problem about pressure stabilization required by methane appliances such as methane cookers is solved. One-time investment is adopted, no follow-up maintenance is required basically, the requirement of accurately using the methane can be met easily, and production and living needs can be satisfied better.

Description

technical field [0001] The invention relates to a biogas fermentation gas storage device, in particular to a biogas constant pressure gas storage tank. Background technique [0002] In the construction of rural household biogas digesters, biogas storage is generally divided into two methods: internal gas storage and external gas storage. The gas storage method in the tank is to use the internal space of the biogas fermentation tank as a gas storage room, and the biogas produced by the fermentation of raw materials is accumulated in the gas storage room. The gas storage device outside the pool is generally independent of the biogas fermentation tank, and the gas storage methods include floating cover gas storage, flexible air bag gas storage, etc. [0003] Rural household biogas digesters are generally buried concrete structures. Setting the gas storage chamber in the biogas digester will inevitably reduce the effective fermentation volume of the biogas digester, reduce the...

AI Technical Summary

Problems solved by technology

There are also problems such as easy air leakage, poor safety, and difficult maintenance when using the floating cover outside the pool to store gas and the air bag to store gas.

[0004] At present, the biogas digesters promoted and used by the country all use water pressure chambers to adjust the biogas pressure or no hydraulic chambers, so that all the biogas produced is stored in the biogas digesters. When in use, the pressure in the pool drops rapidly, and it is difficult to meet the pressure requirements of equipment such as stoves for biogas. Basically, there is very little biogas suitable for use.

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