Vertical stirring, grinding and pyrolysis device

The invention discloses a vertical stirring and grinding pyrolysis device which comprises a pyrolysis reactor; a high-temperature smoke box is arranged around the pyrolysis reactor in a sleeving manner, and high-temperature smoke is input into the high-temperature smoke box, so that the pyrolysis reactor reaches the temperature required by pyrolysis; a stirring shaft and a grinding medium are arranged in the pyrolysis reactor; biomass particles are fed into the pyrolysis reactor; the stirring impeller of the stirring shaft is matched with the grinding medium to grind and fully pyrolyze biomassparticles in the pyrolysis reactor; the surfaces of the particles are rapidly heated, pyrolyzed and carbonized, volatile components are released, surface carbon is ground under the collision and shearing action of the grinding medium, the surfaces of fresh biomass are promoted to be exposed and rapidly pyrolyzed, and the process is repeated until the biomass particles are completely pyrolyzed andcrushed. According to the invention, direct and rapid pyrolysis liquefaction of large-particle biomass can be realized, the biomass crushing pretreatment cost is significantly reduced, and the deviceis simple, easy to amplify and good in technical economy.