The invention discloses a device and method for preparing
biochar from corncobs, and belongs to the technical field of
biochar preparation, the device comprises a
machine base, a frame is fixed outside the
machine base, an outer cylinder is horizontally fixed on one side of the
machine base, and the outer cylinder is fixedly connected with the frame; the crushing seat is arranged above the outer cylinder; the
combustion system is arranged on one side of the outer
barrel, and the
combustion system is externally connected with a hot gas booster fan; the sealing end cover is fixed in the outer cylinder body; the
carbonization cylinder is rotationally mounted on the machine base, and one end of the
carbonization cylinder is coaxially and rotationally connected with the sealing end cover; the
heat control unit is arranged in the annular cavity of the
carbonization cylinder; the material guide channel is arranged on the sealing end cover; the
filter material unit is fixed in the carbonization cylinder; according to the device, a
scrap mixture can be graded according to the particle size, primary carbonization of the
scrap mixture is achieved, then the
scrap mixture is remixed and then subjected to high-temperature
pyrolysis carbonization, and the purity and quality of
biochar preparation are improved.