NOVELTY - Biomass carbonization device comprises a combustion chamber (1), refractory layer (2), insulation layer (3), furnace (4), feed conveyor belt (5), a biomass stock bin, a flash dryer, a flue gas outlet, a heat pipe air pre-heater, a high temperature hot air outlet, a high temperature flue gas inlet, room temperature air inlet, low-temperature flue gas outlet, heat pipe, a separator, fan, a condenser, bearing, sealing, feed inlet, a hollow screw shaft with a heat accumulator, an upper sleeve, a lower sleeve, a biomass charcoal transmission belt and a pipeline.    USE - The biomass carbonization device is useful for carbonization of straws, rice husks, sawdust, peanut shells and other biomass.    ADVANTAGE - The device can realize comprehensive utilization of biomass carbonization products, and can realize co-production of biomass charcoal and bio-oil, adopts a circulating heat exchanger repeatedly, so that the emptied gas can have a low temperature, and the energy loss can be substantially reduced, has little pollution, high carbonization efficiency, good production environment, etc., and can achieve automated control, and is suitable for rural families.    DETAILED DESCRIPTION - Biomass carbonization device comprises a combustion chamber (1), refractory layer (2), insulation layer (3), furnace (4), feed conveyor belt (5), a biomass stock bin, a flash dryer, a flue gas outlet, a heat pipe air pre-heater, a high temperature hot air outlet, a high temperature flue gas inlet, room temperature air inlet, low-temperature flue gas outlet, heat pipe, a separator, fan, a condenser, bearing, sealing, feed inlet, a hollow screw shaft with a heat accumulator, an upper sleeve, a lower sleeve, a biomass charcoal transmission belt, a pipeline, a spraying settling chamber, an oil separation pool, a pump, carbonization chamber and auxiliary equipment.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the biomass carbonization device.    Combustion chamber (1)    Refractory layer (2)    Insulation layer (3)    Furnace (4)    Feed conveyor belt (5)