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沼气池种类很多,我国农村最常用的有:家用水压式沼气池、曲流布料沼气池和圆柱形自循环沼气池等。 一、家用水压式沼气池 这种沼气池的工作原理是:池内装入发酵原料(约占池体积的80％左右),以料液表面为界限,上部为贮气间,下部为发酵间。当沼气池内产生沼气时,沼气集中在贮气间内,随着沼气的增多,池内的压力不断增大,此时沼气压迫发酵液进入水压间。当用气时,贮气间的沼气被放出,此时,水压间内的料液进入发酵间,如此“气压水、水压气”反复进行。因此,称之为水压式沼气池。图一是GB4750—84标准池的示意图。
Many types of biogas digesters, the most commonly used in rural areas are: domestic pressure biogas digesters, meandering cloth digesters and cylindrical self-circulation digesters. First, the domestic pressure biogas digesters This digester works are: the fermentation tank into the raw materials (about 80% of the pool volume), the liquid surface as the limit, the upper part of the storage room, the lower fermentation room . When biogas generates biogas, the biogas is concentrated in the storage space. With the increase of biogas, the pressure in the pool increases continuously, and the biogas pressure the fermented liquid into the water pressure. When the gas is used, the biogas in the gas storage room is released. At this time, the feed liquid inside the water pressure room enters the fermentation room, so that the “barometric pressure water and gas pressure pressure” are repeated. Therefore, it is called a hydraulic digester. Figure I is a schematic diagram of GB4750-84 standard pool.