Landfill gas power generation pretreatment method and pretreatment device thereof

The invention discloses a pretreatment method for generating electricity by garbage landfill gas and a pretreatment device; the method comprises: a. removing the impurities; b. cooling and dehydrating the processed garbage landfill gas to ensure the relative humidity of the garbage landfill gas to be 60-80% and the discharged garbage landfill gas temperature to be less than or equal to 40 DEG C; c. pressurizing and gas transporting, namely, absorbing and propelling the garbage landfill gas by a blower, with the gas flow speed controlled between 8m/s and 25m/s and the discharged garbage landfill gas pressure controlled between 8Kpa and 20Kpa; d. wind cooling, adjusting the gas temperature normal temperature and meeting the gas inlet temperature requirement of the generator set; and e. precise filtering, namely, further filtering the garbage landfill gas by a precision filtration device to remove the solid particle, dust and other impurities in the garbage landfill gas to ensure the content of dust and other im