High-solid anaerobic fermentation tank and jet stirring device for same

Abstract

The invention discloses a high-solid anaerobic fermentation tank and a jet stirring device for the same. The jet stirring device comprises a circulating crushing pump, a liquid-liquid jet stirrer and a gas-liquid jet stirrer. A feed inlet of the circulating crushing pump is connected with a suction pipe, a discharge outlet of the circulating crushing pump is connected with a supply pipe, a suction gate valve is arranged on the suction pipe, and the front end of the suction pipe is mounted on the inner lower portion of the anaerobic fermentation tank; the rear end of a liquid-liquid jet pipeline of the liquid-liquid jet stirrer is connected with the supply pipe of the circulating crushing pump, and a liquid-liquid jet device at the front end of the liquid-liquid jet pipeline is mounted on the inner lower portion of the anaerobic fermentation tank; a gas-liquid jet device at the front end of a gas-liquid jet pipeline of the gas-liquid jet stirrer is mounted on the inner upper portion of the anaerobic fermentation tank, the front end of a biogas pipeline connected to the upper end of the gas-liquid jet device is connected to the top of the anaerobic fermentation tank, and the biogas pipeline is communicated with the inside of the anaerobic fermentation tank. The high-solid anaerobic fermentation tank and the jet stirring device have the advantages that anaerobic fermentation mixing stirring effects can be realized by the jet stirring device, the jet stirring device has a scum crushing function, and accordingly the gas yield can be greatly increased by the jet stirring device; drainage pressures can be greatly lowered, accordingly, energy consumption can be saved, and the jet stirring device is suitable for the high-solid anaerobic fermentation tank.

Description

technical field [0001] The invention relates to a stirring device for anaerobic fermentation, in particular to a jet stirring device and an anaerobic fermentation tank suitable for anaerobic fermentation of high-solid organic waste. Background technique [0002] In the process of anaerobic fermentation, especially in high-solid fermentation materials, stirring is particularly important. The purpose of stirring is to distribute the fermentation materials evenly, increase the contact between raw materials and microbial substrates, and separate the fermented biogas in time, thereby increasing the gas production. Scum is a major problem in the anaerobic fermentation process, and efficient stirring methods can also play a role in breaking the scum layer. [0003] At present, the stirring forms in the anaerobic fermentation tank are mainly divided into three categories: mechanical stirring, hydraulic reflux stirring and biogas reflux stirring. Mechanical stirring equipment is sim...

AI Technical Summary

Problems solved by technology

Mechanical stirring equipment is simple, with many installation forms, convenient and flexible operation, but difficult maintenance and high mechanical wear

Hydraulic reflux stirring consumes a lot of energy, the stirring effect is not good, and it cannot break the scum. Generally, it is only suitable for small digesters, and it is widely used in the field of livestock and poultry manure.

There are few biogas mixing equipment, the structure is simple, and the maintenance is convenient, but there are many auxiliary equipment and the process is more complicated. The biogas pipe fittings and safety measures used in the installation have special requirements.

At present, no jet agitator is used to agitate the materials in the anaerobic fermentation tank, and the existing jet agitator is generally designed as a Venturi tube, and the negative pressure effect generated is not good enough, requiring high energy consumption. problems, and it is not suitable for stirring the high-solid fermentation materials in the anaerobic fermentation tank

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