Ring-in-ring integrated anaerobic fermentation reaction device

Abstract

The invention discloses a ring-in-ring integrated anaerobic fermentation reaction device. The ring-in-ring integrated anaerobic fermentation reaction device comprises a first homogenizing tank, a second homogenizing tank, an outer ring fermentation tank, an inner ring fermentation tank, a ring-in-ring heating water inlet pipe, a ring-in-ring heating water outlet pipe, a first mixed fluid conveying pump and a second mixed fluid conveying pump; the first homogenizing tank and the second homogenizing tank are used for preliminarily mixing original materials, the outer ring fermentation tank is used for carrying out primary fermentation on materials mixed uniformly in the homogenizing tanks, and the inner ring fermentation tank is used for carrying out secondary fermentation on the materials completing primary fermentation in the outer ring fermentation tank. The occupied area of a fermentation system can be reduced, pipeline length is reduced, fluidity of the materials in the fermentation tanks is ensured, the materials in the fermentation tanks are stirred uniformly, and respective self-circulation of the materials in the fermentation tanks and material blending between the fermentation tanks can be achieved.

Description

technical field [0001] The invention belongs to the field of anaerobic fermentation systems and relates to a ring-in-ring integrated anaerobic fermentation reaction device. Background technique [0002] Usually, the two-stage anaerobic fermentation process consists of two fermentation tanks running in series, and the material first enters the first-stage fermentation tank, and then is discharged into the second-stage fermentation tank. Stirring, heating and mechanical equipment are installed in the primary fermentation tank. The decomposition of organic matter in the biogas slurry is mainly completed in the primary fermentation tank. There is no stirring and heating in the secondary fermentation tank, but the residual heat of the biogas slurry is discharged from the primary fermentation tank to continue fermentation. [0003] Since the two-stage fermentation tanks are connected in series, the floor area will be larger and the project investment will be larger; the conveying...

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Problems solved by technology

[0003] Since the two-stage fermentation tanks are connected in series, the floor area will be larger and the project investment will be larger; the conveying pipeline will be longer, and material blockage will easily occur; due to the large heat dissipation area on the surface of the tank wall, the thermal insulation performance is poor; and the traditional fermentation tank uses Central stirring or one-way multi-point stirring, the solid content of the material to be processed is below 8%. When the solid content of the material is higher than 8%, the uniformity of the stirring will be poor and dead angles will easily form; when maintenance is required, complete Stopping the anaerobic system, emptying the tank, and restarting the system after maintenance is a common defect in the current anaerobic fermentation system

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