Self-combustion biomass char production furnace

The invention relates to equipment for producing biomass char, in particular to a self-combustion biomass char production furnace. The production furnace is cylindrical; an inner wall which is concentric with the production furnace is arranged in the production furnace; a part inside the inner wall is a combustion hearth; a drawing plate is arranged in the middle of an annular region between a combustion hearth wall and the outer wall of the production furnace to divide the annular region into an upper carbonization hearth and a lower cooling hearth; a plurality of combustible gas reflux pipelines are arranged; and one end of each combustible gas reflux pipeline is connected to the side wall of the upper part of the carbonization hearth, while the other end is communicated to the combustion hearth from the lower side of the drawing plate. In the production furnace, biomass energy is utilized, so that the utilization of fossil energy is avoided and low carbon emission is achieved; combustible gas is recycled and heat utilization ratio is high, so that pollution on the atmospheric environment is reduced; due to a carbonization and cooling integrated design, safety and high efficiency are achieved; and the production furnace has a simple design, low cost and high comprehensive energy utilization ratio and is movable.