Biochar preparation device based on carbon-gas co-production

The invention discloses a charcoal-gas co-production-based charcoal preparation device, which comprises a dry distillation kettle, a multistage separator and a gas storage tank, the dry distillation kettle comprises: a kettle body, the top of the kettle body is provided with a feed inlet and a discharge pipe, the bottom of the kettle body is provided with a slag discharge pipe, and the side wall of the kettle body is provided with an air inlet pipe; the kettle body is sleeved with the heating cylinder, a channel allowing a heating medium to flow is formed by the side wall of the heating cylinder and the outer side wall of the kettle body, at least two annular partition plates are arranged in the channel at intervals, a plurality of heating sections are formed, a plurality of air holes are formed in one side of each partition plate, the air holes in every two adjacent partition plates are oppositely formed, and an air distribution plate is vertically arranged on the uppermost partition plate; a plurality of ai