Large livestock manure and straw mixed raw material anaerobic fermentation tank and method thereof

Abstract

The invention discloses a large livestock manure and straw mixed raw material anaerobic fermentation tank and a method thereof. The tank body is formed by a thick steel plate. The diameter of the tankbody is 18-22m, the height-diameter ratio of the tank body is (0.9-1.2): 1, and the volume of the tank body is 5000-6000m<3>; a biogas outlet, a positive and negative pressure protector, a pressure transmitter and an observation light hole are formed at the top of the tank body, and the pressure in the tank body is maintained at a normal positive and negative pressure state; a flame arrester, a biogas mass flowmeter and a biogas analyzer are separately mounted at the biogas outlet and an overflow tube is arranged at the liquid level in the upper portion of the tank body, so that the safety ofthe large fermentation tank and the biogas quality are effectively guaranteed; a material mixing degree measuring device effectively controls a material fermenting process in the tank body immediately; a plurality of temperature transmitters which are mounted on the tank body are matched with a heating coil device, and an insulating layer coats the outer side of the tank body, so that the temperature of slurry in the tank body is controlled effectively; a central stirring device, a circular spraying and cracking device and a dross cutting and cracking device are also mounted in the tank body,so that the stirring efficiency and the cracking efficiency are improved effectively, the gas yield is high, and the large livestock manure and straw mixed raw material anaerobic fermentation tank isenergy-saving and emission-reducing.

Description

technical field [0001] The invention relates to a large-scale anaerobic fermentation tank for mixed raw materials of livestock and poultry feces and straw and a method thereof, belonging to the technical field of biological fermentation. Background technique [0002] Biogas technology is a systematic engineering equipment that uses anaerobic digestion technology to degrade various organic wastes and produce clean energy biogas. Anaerobic digestion technology uses anaerobic microbial activities to decompose organic matter into methane, carbon dioxide and water, reducing the amount of materials The treatment and disposal of chemicalization, stabilization, and recycling. [0003] Large-scale livestock and poultry farming in rural areas of our country has become a dominant industry, and it has also brought serious pollution problems. The waste pollution of livestock and poultry farms affects the ecological balance and living environment in rural areas. It is the most effective w...

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Problems solved by technology

[0005] The problem to be solved by the present invention is that the scale of the existing anaerobic fermentation equipment is small, the fermentation capacity is low, the equipment structure is unreasonable, and the scum formed by fermentation cannot be effectively cracked, resulting in uneven stirring and dispersion, and low biogas production rate. Low-cost problem, provide a large-scale livestock and poultry manure straw mixed raw material anaerobic fermentation tank and its method, the tank is equipped with stirring shell breaking, cutting shell breaking, spray shell breaking device and heating, heat preservation, so that the tank maintains a constant temperature , Stir the raw materials more evenly, improve the shell breaking rate, high gas production rate, energy saving and emission reduction, and cost saving

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