Small-sized rapid carbonizing device for straw field

The utility model discloses a small-sized straw field end rapid carbonizing device, relates to the technical field of biomass recycling, solves the technical problem of low resource utilization rate in the straw carbonizing process, and adopts the technical scheme that crushed straws are poured into a chain furnace to be gasified, and biochar generated by gasification is directly returned to the field after being cooled by spraying water; the gasified gas is combusted and then filtered and dedusted to generate potassium-containing organic wastewater which can be used as a fertilizer to be returned to the field. And meanwhile, heat generated by combustion of the gasified gas is supplied as required by the detachable heat exchanger. The device integrates crushing, gasification, combustion and heat supply, energy waste is completely eradicated while straw is rapidly carbonized and returned to the field, and generated waste water is returned to the field as organic fertilizer. The device is simple in structure, s