Low temperature anaerobic biogas fermentation tank

Abstract

The invention relates to a low-temperature anaerobic biogas fermentation tank. The low-temperature anaerobic biogas fermentation tank comprises a tank body, and a gas storage chamber and a fermentation chamber which are arranged in the tank body. A feeding pipeline is arranged at one side in the tank body, and a discharging pipeline is arranged at the other side; the top of the tank body between the feeding pipeline and the discharging pipeline is provided with the gas storage chamber, the top of gas storage chamber is provided with a center hole and a gas outlet; a manual stirring device is arranged in the center hole, the tail end of the manual stirring device goes through the gas storage chamber and stretches into the fermentation chamber; a gas outlet pipeline is arranged in the gas outlet; an inoculation pipeline is arranged between the feeding pipeline and the inner wall of the tank body; the outer wall of the tank body is sequentially provided with a thermal insulation layer and a protective layer from inside to outside, a low temperature strain activation chamber is arranged between the fermentation chamber and the bottom of the tank body, and the low temperature strain activation chamber is connected with the inoculation pipeline; and a manual discharging pump is arranged in the discharging pipeline. The tank has the advantages of simple structure, convenient use, good sealing performance, good thermal insulation performance, long service life and the like, and can realize the normal biogas fermentation of the north in winter without an external energy supply.

Description

technical field [0001] The invention relates to the technical field of biogas fermentation equipment, in particular to a low-temperature anaerobic biogas fermentation tank. Background technique [0002] In recent years, people's demand for energy has continued to increase, various fossil energy resources have continued to decrease, and prices have continued to rise, which has greatly affected people's production and life. Therefore, the development and utilization of environmentally friendly and renewable energy has become more and more popular workers' attention. Biomass energy has always been an important source of energy for human survival, accounting for the fourth largest energy consumption in the world, second only to coal, oil and natural gas. Among them, biogas occupies a very important position in the field of biomass energy, and biogas fermentation technology is the key to the conversion of biomass energy. Biogas fermentation, also known as anaerobic digestion an...

AI Technical Summary

Problems solved by technology

The early biogas fermentation devices were built with bricks and cement, which required a large amount of construction work and low structural stability. At the same time, this type of biogas digester was not resistant to corrosion and had poor sealing effects, which affected the fermentation of anaerobic bacteria and the generation of biogas. The original biogas generator has been eliminated

Subsequently, many new types of fermentation tanks appeared, such as ordinary hydraulic pressure underground biogas digesters, upflow anaerobic filter biogas devices, meandering cloth biogas digesters, separation bra-type biogas digesters, etc., but due to short circuit in the reactor, easy to block, In winter or when the temperature is low, the gas production is obviously insufficient or cannot be used, the equipment structure is complex, the cost is high and the operation is cumbersome, etc., which make the promotion of biogas fermentation devices in my country have not been smooth.

[0004] In response to the above shortcomings, many people in China have made innovations and improvements. The patents with publication numbers CN201695037U and CN201713517U refer to the fact that an electric heater or a water heating heater is installed on the lower part of the outer wall of the tank. By heating, the fermenter maintains a normal temperature for fermentation; No. CN202017014U patented biogas tank is a detachable structure, which can be combined into the required volume according to the actual situation; but there are still defects, such as unreasonable tank structure design, high cost, cumbersome operation, etc., the most important is It is necessary to provide additional energy to ensure the use of low temperature in winter in the north, which invisibly increases the input of cost and energy consumption, which is tantamount to using one energy to prepare another energy, which deviates from the original intention of biogas energy development

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