The raw materials to the top by sealing the valve into the hopper, and evenly distributed in the pyrolysis furnace, through adjusting the first fan and the two fan, raw materials in the pyrolysis furnace followed through drying, pyrolysis, pyrolysis, reduction of two times in four steps, the formation of mixed gas based on CO H2, containing a small amount of CH4 the gas is pumped from the furnace top under the action of the draught fan; after pyrolysis of biomass carbon through the grate rotates, discharged from the bottom side.

The technology can simultaneously obtain low tar gas and biomass charcoal, which can be directly used as fuel or as a chemical raw material after washing and purifying. Biomass carbon can be used to produce fuel with high added value, carbon or activated carbon, which has significant economic benefits。