Vertical stirring, grinding and pyrolysis device

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and in particular relates to a vertical stirring and grinding pyrolysis device. Background technique [0002] Biomass fast pyrolysis liquefaction technology can obtain bio-oil with higher yield. Compared with raw biomass, bio-oil has greatly improved energy density and greatly reduced transportation costs, which is conducive to further centralized large-scale refining Transformation and high-value utilization are of great significance. [0003] In order to achieve rapid pyrolysis of biomass particles, that is, to achieve a high heating rate of biomass particles, the particle size of biomass particles is required to be very small, so that the external heat can be quickly transferred to the inside of biomass particles, which is of great importance to the biomass particles. The crushing pretreatment of substances places high demands on them. Taking fluidized bed rapid pyrolysis liquefaction...

AI Technical Summary

Problems solved by technology

Considering that the pyrolysis process is endothermic, how to quickly and effectively transfer the external heat to the pyrolysis furnace is the key to ensure the rapid heating and rapid pyrolysis of biomass particles, especially when the pyrolysis technology is scaled up and applied, the heat is fast, Effective supply has become an important bottleneck restricting the application of biomass fast pyrolysis liquefaction technology

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