A self-heating temperature-controllable biogas system

Abstract

The invention discloses a self-heating biogas system with controllable temperature, which comprises a biogas pit, the two sides of the biogas pit are respectively connected with a feeding pipe and a discharge pipe, the top of the biogas pit forms a biogas area, and the top of the biogas pit is connected with an exhaust There is a control cabinet outside the biogas digester. The exhaust pipe is respectively connected to the water heater and heat exchanger through an adjustable diversion assembly. The outlet end of the water heater is connected to the heat exchanger. The adjustable diversion assembly includes an air inlet and two air outlets. The air port is connected to the exhaust pipe, one of the air outlets is connected to the water heater to provide the biogas burned by the water heater, and the other air outlet is connected to the air inlet of the heat exchanger, and the air outlet of the heat exchanger is connected to the aeration pipe through the fan for The heated biogas is circulated into the biogas tank, and the invention maintains the reaction temperature in the biogas tank in a stable range, thereby fully ensuring the gas production efficiency.

Description

technical field [0001] The invention relates to a methane digester, in particular to a temperature-controllable methane system. Background technique [0002] As we all know, biogas is a combustible gas produced by microbial fermentation of organic matter in an anaerobic environment under certain temperature, humidity, and pH conditions. Since this gas was originally found in swamps, lakes, and ponds Yes, so people call it biogas. The reaction temperature is greatly affected by the environment, and the reaction temperature fluctuates greatly in different seasons, resulting in large fluctuations in gas production. In summer, the temperature is high and the gas production is large, and in winter, the temperature is low and the gas production is low. [0003] At present, in the field of biogas fermentation, the most common temperature for mesophilic fermentation is 30-40°C, and the optimum fermentation temperature is 35-40°C. The high-temperature fermentation process mostly op...

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Problems solved by technology

The reaction rate of high-temperature fermentation is 25% to 50% higher than that of medium-temperature fermentation, and the biogas yield is also high. However, under the current normal temperature environment, it is difficult in the industry to achieve a temperature above 50°C in the biogas digester. The design scheme currently used in the field of biogas power generation It must be required that the biogas digester has a very stable supply, so the biogas production environment must be continuously and stably operated at 50-60°C. However, according to the current technology, the biogas digester can only be heated by external heating, but the external heating method itself has an impact on the cost of biogas production

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