Gas-stirring based wet anaerobic fermentation device for fruits and vegetables and working method of device

The invention relates to a gas-stirring based wet anaerobic fermentation device for fruits and vegetables. The device comprises a fermentation tank, a scum barrel, a central sleeve and a biogas high-pressure pipe; the fermentation tank is connected to a material inlet pipe and a biogas discharge pipe; the end wall of a pipe mouth of the lower end of the scum barrel is in sealed and fixed connection to the inner wall of the fermentation tank, and a circle of residue discharge groove is formed between the outer wall of the scum barrel and the inner wall of a fermentation cavity; the a central sleeve is fixedly arranged in the fermentation cavity; and the gas outlet end of the biogas high-pressure pipe extends into the central sleeve. The invention also provides a working method of the wet anaerobic fermentation device for the fruits and the vegetables. The method comprises the following steps: firstly, conveying materials into the fermentation cavity through the material inlet pipe; secondly, introducing high-p