Biocarbon/steam co-production device and technology through biomass pyrolysis, gasification, and combustion sectional conversion

The invention discloses a biocarbon/steam co-production device and technology through biomass pyrolysis, gasification, and combustion sectional conversion. The co-production device comprises a fluidized-bed pyrolysis and gasification furnace, a low thermal value gas combustion chamber, a primary separation device, a secondary cyclone separator, an air preheater, a steam generator, and a flue gas processing facility. The technology comprises the following steps: making biomass raw materials carry out pyrolysis and gasification reactions in the fluidized-bed pyrolysis and gasification furnace so as to generate biocarbon and high-temperature low thermal value fuel gas, separating the biocarbon and fuel gas by the two grade separation devices to obtain high quality biocarbon, transferring the separated high temperature fuel gas into the low thermal value gas combustion chamber, burning, and transferring the high temperature flue gas generated by the combustion into the steam generator to generate steam. The provided technology is advanced, the production equipment is simple and reliable, the production cost can be effectively reduced, and the production benefit is improved.