Biogas raw material pretreatment device

Abstract

The invention relates to a biogas raw material pretreatment device comprising a sewage collection tank, a blending tank, and an adjustment tank. The sewage collection tank communicates with a sewage channel, and is connected with the blending tank through a sewage pipe. A stirrer is arranged on the blending tank. A secondary delivery pump is arranged on the bottom of the adjustment tank. The outlet of the secondary delivery pump communicates with a material pipe. The adjustment tank communicates with a biogas fermentation tank through the material pipe. The blending tank and the adjustment tank are communicated through a sand precipitation channel. Separation plates are arranged in the sand precipitation channel, and are staggered on the side wall of the sand precipitation channel. First grills are directly provided on two separation plates close to the adjustment tank. According to the invention, the sand precipitation channel is arranged between the blending tank and the adjustment tank, and the separation plates are staggered in the sand precipitation tank, such that sewage flow direction is changed, and sand is precipitated in the sand precipitation channel. Therefore, a purpose for removing sand and sludge is achieved.

Description

Technical field: [0001] The invention belongs to the technical field of biogas generation, and in particular relates to a pretreatment device for biogas raw materials. Background technique: [0002] Biogas, its main component is methane, methane is an ideal gas fuel, it is colorless and odorless, and it can burn when mixed with an appropriate amount of air. The calorific value of pure methane per cubic meter is 34,000 kilojoules, and the calorific value of biogas per cubic meter is about 20,800-23,600 kilojoules. That is, after 1 cubic meter of biogas is completely burned, it can produce the heat equivalent to 0.7 kg of anthracite. Compared with other gases, it has better antiknock performance and is a good clean fuel. In addition to being directly burned for cooking, drying agricultural and sideline products, heating, lighting, and gas welding, biogas can also be used as fuel for internal combustion engines and for the production of chemical raw materials such as methanol...

AI Technical Summary

Problems solved by technology

[0003] A complete biogas fermentation project, regardless of its scale, includes the following technological process: collection of raw materials, pretreatment, fermentation device (methane digester), post-treatment of discharged materials, purification and storage of biogas, etc. At present, fermentation In the pretreatment process of raw materials, the fermented raw materials are mixed with water, and then transported into the fermenter for fermentation to produce biogas. The existing pretreatment devices often cannot mix the raw materials evenly, and impurities such as sediment contained in the raw materials cannot be removed, resulting in biogas production. Low gas volume and low efficiency

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