Self-heating temperature-controllable biogas system

Abstract

The invention discloses a self-heating temperature-controllable biogas system, which comprises a biogas digester, two sides of the biogas digester are respectively connected with a charging pipeline and a discharging pipeline; a biogas area is formed at the top of the biogas digester; the top of the biogas digester is connected with an exhaust pipeline; a control cabinet is arranged outside the biogas digester; the exhaust pipeline is connected with a water heater and a heat exchanger through an adjustable flow dividing assembly; the water outlet end of the water heater is connected with the heat exchanger; an adjustable shunting assembly comprises an air inlet and two air outlets; a gas inlet is connected with the exhaust pipeline, one air outlet is connected with the water heater to provide biogas for water heater combustion, and the other gas outlet is connected with the gas inlet of the heat exchanger, the gas outlet of the heat exchanger is connected with an aeration pipeline through a fan, and the aeration pipeline is used for circulating the heated biogas into the biogas digester, so that the reaction temperature in the biogas digester is maintained in a stable range, and the gas production efficiency is fully guaranteed.

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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