High-concentration straw methane fermentation equipment

Abstract

The invention belongs to the field of energy sources and relates to high-concentration straw methane fermentation equipment which comprises a fermentation tank (11) and a liquid storage unit (1), wherein a feed pipe (10) and a methane pipe orifice (9) are arranged at the top of a tank body; a slag discharge port (7) is formed at the bottom of the tank body; the feed pipe (10) is internally provided with a gravity material pusher (6); a circular-table-shaped slag blocking ring plate (14) is mounted at the upper part in the tank body; the upper end of the slag blocking ring plate (14) is connected with an outlet of the feed pipe (10) and the lower end thereof is connected with an internal wall of the tank body; sieve pores are formed in the ring plate; a liquid-slag separation plate (16) is mounted at the lower part in the tank body; sieve pores are formed in the liquid-slag separation plate (16); the periphery of the liquid-slag separation plate (16) is connected with the internal wall of the tank body; a liquid discharge pipe (3) is arranged at the bottom of the fermentation tank (11); and an outlet of the liquid discharge pipe (3) corresponds to or is connected with the liquid storage unit (1). The high-concentration straw methane fermentation equipment can directly consume bulky-grain straw, is low in energy consumption, smooth in feeding and discharging, and low in input-output ratio.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a high-concentration straw biogas fermentation device. Background technique [0002] Crop stalks come from a wide range of sources, and the amount of resources is large. A large amount of stalks cannot be effectively treated, which brings a series of environmental problems. Straw biogas utilization can effectively solve this problem, and at the same time produce high-quality bioenergy—biogas, which has become one of the important means of straw resource utilization. The raw materials of existing straw continuous fermentation devices generally need to be pretreated such as crushing, because of their poor fluidity, mechanical stirring is usually required to achieve mass and heat transfer. The specific gravity of the straw is light, and it is easy to float up to form a hard shell after entering the fermentation device, which hinders the accumulation of biogas generated in the pond...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of low material concentration and low raw material utilization rate in the prior art straw biogas continuous fermentation device, relying on mechanical equipment for output, large investment in equipment, high energy consumption, and low efficiency of anaerobic digestion and gas production, and provide a A high-concentration straw biogas fermentation device that can directly digest large particles of straw, has low energy consumption, smooth feeding and discharging, and low input-output ratio

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