Fermenting mixing tank for resourceful utilization of methane

Abstract

The invention discloses a fermenting mixing tank for resourceful utilization of methane. The tank as a system is high in automation level and has a temperature control function; fermenting material and fermenting liquor at the bottom of the tank are allowed to flow cyclically into the top end of the tank from a reflow outlet through a reflow structure, thereby enabling vertical full mixing of the fermenting material and the fermenting liquor; meanwhile, under stirring action of stirring blades, the fermenting material and the fermenting liquor are fully mixed more efficiently, thus efficiency of methane production by straws is improved; in addition, whole equipment is automatically controlled in connection with a PLC (programmable logic controller).

Description

technical field [0001] The invention belongs to the technical field of producing biogas from straw, and relates to a fermentation mixing tank for biogas resource utilization. Background technique [0002] my country is a large agricultural country, and the sown area of ​​crops ranks first in the world. According to statistics, my country currently produces about 700 million tons of straw every year. In the past, crop straws were mostly used as fuel, but with the continuous improvement of people's living standards in our country, as well as the development of rural economy and the improvement of energy supply, in recent years, farmers' burning and utilization of straws have gradually decreased, and the remaining crop straws The quantity is getting bigger and bigger, and it is estimated that it has reached about 400 million tons per year. The dumping and random burning of a large amount of surplus straw has caused a large number of social, economic and ecological problems suc...

AI Technical Summary

Problems solved by technology

[0003] Straw dry fermentation to produce biogas is rice, corn, peanut and other crop straw as raw material, after crushing and adding fermentative agent for compost retting and other pretreatments, it is added to biogas digesters or biogas tanks for anaerobic fermentation to produce biogas and organic fertilizers. In industrial production, the CSTR reactor (continuous stirred tank reactor, continuous stirred reactor system) is usually used as an anaerobic fermentation device to produce biogas. The stirring efficiency of the traditional CSTR reactor needs to be improved, and the degree of automation is low, and the temperature control is lacking.

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