Combined marsh gas fermentation pool

Abstract

The invention relates to a composite marsh gas fermenting tank for marsh gas fermentation. Marsh gas fermenting tanks in the prior art all need external power settings; heat generated by biomass during the process of aerobic fermentation is not utilized to improve fermenting temperature of the marsh gas fermenting tanks; moreover, pre-treatment mode of solid-liquid separation of raw materials is generally adopted, thereby input cost is also increased. The invention consists of a stack retting tank provided with a heat exchanger and an internal circulating marsh gas reactor, wherein, a heat absorbing plate is arranged inside the stack retting tank; a heat exchanger is arranged on a reflux pipe in the marsh gas reactor; a closed circulation loop is formed by the heat absorbing plate and a pipe of the heat exchanger; circulating liquids are filled in the circulation loop. Therefore, the whole structure and the whole process do not need any external power, simultaneously marsh gas solid raw materials are simultaneously pretreated by the stack retting tank during the process of stack retting, thereby the contradiction of feeding of the solid raw materials and slag tapping is solved and simultaneously the cost is reduced; the invention greatly improves marsh gas application conditions in low temperature areas.

Description

technical field [0001] The invention relates to a combined biogas fermentation tank for biogas fermentation, in particular to a combined biogas fermentation tank which can use various biomass as raw materials to generate biogas and has an automatic temperature raising device. Background technique [0002] Biomass biogasification technology as an alternative energy source has been applied for decades and various biogas fermentation tank structures have been continuously improved. Just as the various biogas reactors listed in the open document "Biogas Practical Technology". These biogas reactors have certain effects in improving the living conditions of anaerobic activated sludge and increasing the rate of biogas production. At the same time, the method used to increase the temperature of the biogas digester in the existing mesophilic fermentation digester structure is to heat the digester with a heat source. Patent "200510016826" mentions the use of solar water heaters to he...

AI Technical Summary

Problems solved by technology

Since most of the crops or agricultural product processing discards have a large amount of solid waste residue, if they enter the tank for fermentation, it will bring difficulties in the removal of residue in the biogas tank

The existing technology generally adopts the pretreatment method of solid-liquid separation of raw materials, which increases the input cost

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