System and method for preparing biomass charcoal by using cement kiln inert gas

The invention belongs to the technical field of biomass utilization, and discloses a system and method for preparing biomass charcoal by using cement kiln inert gas, and the system comprises a feeding module, a pyrolysis gas treatment module and a biomass charcoal storage module, and further comprises a drying pyrolysis device and a cement kiln inert gas supply module, a pyrolysis gas outlet of the drying pyrolysis device is connected to the pyrolysis gas treatment module, a solid product outlet of the drying pyrolysis device is connected to the biomass charcoal collection and storage module, the drying pyrolysis device comprises a drying device, a spiral conveying device and a rotary pyrolysis furnace, and a spiral coil pipe is fixed to the inner wall of a rotary furnace body of the rotary pyrolysis furnace; one end of the spiral coil is connected to a cement kiln inert gas supply module to receive high-temperature inert gas, the other end of the spiral coil is cooled through a cooling structure and then is