Pretreatment system and method for raw anaerobic fermentation material

Abstract

The invention discloses a pretreatment system and method for raw anaerobic fermentation materials. The pretreatment system comprises a pretreatment pool filled with raw anaerobic fermentation materials, wherein dilution, stirring and settlement layering of the raw anaerobic fermentation materials are carried out in the pretreatment pool so as to enable the materials to be divided into a top layerof scum silica frost, a middle layer of nutriments and a bottom layer of sand settling; a grating ditch communicating with the pretreatment pool, wherein the scum silica frost in the top layer and the nutriments in the middle layer of the pretreatment pool pass through the grating ditch and scum silica frost is filtered; and a sand-water separator with one end extending into the bottom of the pretreatment pool and the other end extending out of the pretreatment pool, wherein the sand-water separator sucks in the sand settling in the bottom layer and separates sand from water. According to theinvention, the problems in existing anaerobic fermentation technology for the production of biogas that raw materials are difficult to purify and subsequent processing has great load are overcome; utilization rate of the raw materials is enhanced; and running cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of energy regeneration in environmental engineering, and in particular relates to an anaerobic fermentation raw material pretreatment system for efficiently removing scum and sand in fermentation raw materials, and the system is applied to an anaerobic fermentation reactor. Background technique [0002] At present, the anaerobic fermentation process is mainly used in China to process livestock and poultry manure to generate biogas. Due to the immature development of my country's biogas technology and market, especially the rational and efficient use of anaerobic fermentation raw materials cannot be carried out. In the anaerobic fermentation process of biogas production, due to the large amount of inorganic matter and light scum in the raw materials, most of the current biogas projects often have pipeline blockage and equipment damage during the daily operation of the biogas station, shortening the The servic...

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Problems solved by technology

[0005] In order to overcome the problem that the scum and sand of the fermentation raw material are difficult to remove in the existing fermentation raw material pretreatment system for biogas production, the present invention proposes an anaerobic fermentation raw material pretreatment system to effectively remove the floating scum in the fermentation raw material. Slag and sand settling, while realizing efficient anaerobic fermentation, enables the stable operation of the biogas station, reduces labor costs, and prolongs the service life of various equipment in the biogas station

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