Device integrating straw pretreatment, two-phase fermentation and automatic hull breaking

Abstract

A device integrating straw pretreatment, two-phase fermentation and automatic hull breaking comprises a fermentation tank, and is characterized in that a built-in type pretreatment pool is arranged in a solid-phase fermentation area and is fixed by a support, the support comprises an upper group of steel screw blades and a lower group of steel screw blades, and a spiral feeder extends and enters the fermentation tank and is connected to the bottom of the built-in type pretreatment pool; the fermentation tank is divided into a solid-phase fermentation area and a liquid-phase fermentation by a solid-phase funnel, a communication pipe is connected to the outer side of the fermentation tank wall on the upper side of the solid-phase funnel, the lower end of the communication pipe is connected to the liquid-phase area, and a liquid-phase gas outlet is formed in the top of the liquid-phase fermentation area; a blow-down pipe is connected to the bottom end of the solid-phase funnel; a three-way pipeline is connected to the bottom end of a liquid-phase funnel, one way is led out of a sludge discharge port after connected with a blow-down valve, another way is upwards connected with a nozzle along a biogas slurry return pipe and enters the upper part of the solid-phase fermentation area of the fermentation tank, a gas storage cabinet is arranged at the upper part of the tank body, and the top end of the gas storage cabinet is connected with a solid-phase gas outlet. The device can operate continuously, automatic hull breaking is realized through liquid level fluctuation, stirring power is saved, the solid-phase fermentation and liquid-phase fermentation are performed respectively, and degradation is thorough; the pretreatment process is simplified, and power is saved; and further, the water seal problem in the processes of straw feeding and automatic hull breaking is solved.

Description

technical field [0001] The invention relates to a straw pretreatment and fermentation device, in particular to a straw pretreatment / two-phase fermentation / automatic shell breaking integrated device. The water seal problem in the process of straw feeding and automatic shell breaking. [0002] Background technique [0003] The traditional biogas production is solid-liquid mixed fermentation. After the biogas digester has been in operation for a period of time, some of the daily fermented raw materials float up under the action of buoyancy to produce scum, and the organic acids produced during the biogas fermentation process accumulate on the upper layer of the scum, resulting in Incrustation, incrustation leads to the obstruction of the biogas accumulation produced by fermentation, the reduction of effective volume and gas storage chamber, the reduction of raw material utilization rate, and the reduction of gas production. Severe encrustations tend to make it difficult to run...

AI Technical Summary

Problems solved by technology

[0002] Traditional biogas production is solid-liquid mixed fermentation. After the biogas digester has been in operation for a period of time, some of the daily fermented raw materials float up under the action of buoyancy to produce scum. The organic acids produced during the biogas fermentation process accumulate in the upper layer of the scum, resulting in crusting, which hinders the accumulation of biogas produced by fermentation, reduces the effective volume and gas storage chamber, reduces the utilization rate of raw materials, and reduces the gas production

When crusting is severe, it tends to make it difficult to run a biogas fermentation

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