High-solid anaerobic reaction device and method for organic garbage

Abstract

The invention relates to a high-solid anaerobic reaction device and method for organic garbage. The device comprises a pulverizer, a pretreatment pond and an anaerobic fermentation tank, wherein the pulverizer is arranged above the pretreatment pond; a spiral conveying device is arranged below the material outlet of the pretreatment pond and connected with the anaerobic fermentation tank; a liquid-collecting pipe is connected to the bottom of the anaerobic fermentation tank and connected to a four-way pipe fitting; the other three ports of the four-way pipe fitting are connected with a water draining pipe, a pretreatment pond backflow pipe and a biogas slurry spraying return pipe respectively; the anaerobic fermentation tank is internally sequentially provided with a spraying perforated plate and a sieve plate from top to bottom. According to the anaerobic reaction device for the organic garbage with the high solid content, the material pulverization, pretreatment and fermentation are integrated, the material uniformity is guaranteed, an anaerobic fermentation process is facilitated, the solid concentration and uniformity of a material are regulated through fermentation liquor backflow, and the stable fermentation of organic garbage is realized; the anaerobic reaction device has the characteristics of wide adaptability, high treatment efficiency, compact layout, stable operation, small land occupation area and the like.

Description

technical field [0001] The invention relates to a high-solid anaerobic reaction device and an anaerobic reaction method for organic waste, and belongs to the technical field of waste resource utilization. Background technique [0002] Dry fermentation, that is, high-solid anaerobic digestion, refers to the process of using solid organic waste as raw material and carrying out biogas fermentation under the condition of no flowing water. The growth of microorganisms and the products formed are all in the substrate. surface. Its main feature is that there is no free water in the fermentation system, and the microorganisms react on the solid substrate with sufficient humidity, and the substrate is neither soluble in water nor suspended in water. It not only plays a role of providing carbon source, nitrogen source, water, inorganic matter and other nutrients, but also provides a fixed place for the growth of microorganisms, so the process is very similar to the microorganisms tha...

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Problems solved by technology

The above two patents do not consider factors such as material crushing and pretreatment process, material unevenness, complex equipment, etc., and cannot ensure long-term stable operation of the dry fermentation process

[0005] Chinese patent CN103131631A (patent number: 201310049692.4) discloses a dry fermentation device that uses high-concentration solid raw materials to prepare biogas. The rotary spraying device is composed of motor (including reducer), coupling, shaft, upper closed water pipe, liquid distribution tank, perforated spray pipe, spray hole, water pipe rotary joint, and liquid supply pipe. Although uniform inoculation can be achieved to a certain extent, the device has the following disadvantages: 1. The device adopts the top feeding method and cannot ensure that the materials are first-in-first-out, and the advanced materials are mixed with the latter materials, and the latter materials are sometimes not yet ready. After complete fermentation, the screw output device will be output out of the fermenter, resulting in uneven fermentation of the incoming material, seriously affecting the gas production and the quality of the fermentation broth. Although the material distribution device is used, the effect is not good, and the cost of the fermenter is increased. 2. The device adopts the method of top feeding, and the rotary spraying device is located on the top of the fermentation tank, and the top feeding is easy to block the rotary spraying device. 3. The structure of the device is complicated, and the power equipment used is more, and the cost is high

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