Fecha de publicación: 12/03/2021 Fuente: Wipo Tobacco Agriculture The utility model discloses a tobacco straw methane fermentation pretreatment device which comprises a frame type stirrer, a pipeline crusher, a rotor pump and a negative pressure deodorization mechanism, the frame type stirrer comprises a stirring barrel, a cover plate, a feeding hopper and a stirrer, the cover plate is fixed above the stirring barrel, and the stirrer is installed in the stirringbarrel through the cover plate; the feeding hopper is fixed on one side of the upper part of the stirring barrel; the feeding end of the pipeline crusher is connected to the bottom of the stirring barrel through a pipeline, and the discharging end of the pipeline crusher is connected with the rotor pump through a pipeline; the negative pressure deodorization mechanism is connected to the upper part of the stirring barrel and is used for removing odor. According to the utility model, tobacco straws can be uniformly mixed with other fermentation raw materials, and the tobacco straws in the mixture are further crushed, so that the pretreatment of the tobacco straws before fermentation is realized, and the purpose of effectively preparing biogas by using the tobacco straws is achieved.