Dry fermentation system and fermentation method thereof

Abstract

The invention relates to a dry fermentation system and a using method thereof, and belongs to the technical field of agricultural biomass utilization. The system comprises a fermentation bank body, wherein an inlet is positioned on one side of the top part of the fermentation bank body, a discharge port is positioned at one end of the bottom part of the fermentation bank body, a spiral conveyer is arranged at the bottom of the fermentation bank body, and a feed device is arranged above the inlet; a bent-tube shaped piston cylinder is arranged in the feed device; the lower end of the vertical section of the piston cylinder is communicated with the inlet; and a piston driven by a reciprocating mechanism is arranged in the horizontal section of the piston cylinder. According to the dry fermentation system, automatic feeding and discharging operation and continuous gas production can be realized, the labor intensity of methane engineering operation can be greatly reduced, the automatic operation function is promoted, and the fermentation bank body is immersed in hot water and uniformly heated; biogas slurry enhanced spraying operation is adopted in the fermentation process, and a biogas slurry shell breaking injection device is arranged inside the fermentation bank body, so that the function of mass and heat transfer by shell breaking and biogas slurry injection can be enhanced, and the gas production rate and gas production quality can be greatly improved.

Description

technical field [0001] The invention relates to a fermentation equipment, in particular to a dry fermentation system, and also relates to a fermentation method using the system, which belongs to the technical field of agricultural biomass utilization. Background technique [0002] Compared with the traditional wet fermentation, the dry fermentation substrate dry matter concentration TS is generally above 20%, and anaerobic bacteria are used to biodegrade the fermentation raw materials to produce CH 4 the process of. Dry fermentation produces less biogas slurry, requires less crushing of raw materials, has strong adaptability to raw materials, and has low post-treatment costs of biogas residues. Therefore, it has been widely used in the production of biogas from solid organic waste such as livestock and poultry manure, crop straw, and domestic garbage. And green organic fertilizer, basically achieve zero emissions. With the urbanization of rural areas and the intensive devel...

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Problems solved by technology

[0003] According to the applicant's understanding, the current dry fermentation equipment is relatively simple, and it is impossible to realize the feeding and discharging operations in a closed state. Therefore, not only the operation is labor-intensive and time-consuming, but also the operation is labor-intensive, and continuous production of biogas cannot be realized.

In addition, due to the lack of reasonable measures to control the temperature of the fermentation process, the gas production efficiency is low and the quality is poor.

[0004] The existing dry fermentation device cannot realize automatic continuous feeding and discharging. The fermentation adopts intermittent fermentation operation, which affects the gas production efficiency. The raw materials are heated unevenly during the fermentation process, and local materials are prone to acidification. The biogas slurry cannot enter the interior of the fermentation material, resulting in poor mass and heat transfer effects, which affects the operation quality of the entire biogas project

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