Method for preparing biochar through self-propagating pyrolysis

The invention discloses a method for preparing biochar through self-propagating pyrolysis. The treatment method comprises the following steps: drying and crushing waste biomass, mixing the crushed biomass with a nitrate solution, carrying out ultrasonic treatment, drying the solution to obtain xerogel, mixing the xerogel with a catalyst, carrying out pyrolysis, and naturally cooling the pyrolyzed product. According to the method, the waste biomass is used as a raw material, a self-propagating pyrolysis principle is fully utilized, other extra energy is not used, the nitrate and the biomass are subjected to an exothermic oxidation-reduction reaction in a self-propagating combustion wave form under the catalytic action of a catalyst, the biochar is formed in a relatively short time, the related process is simple and efficient, the cost is low, and the method is suitable for industrial production. Popularization and application are facilitated. 本发明公开了一种自蔓延热解制备生物炭的方法，所述的处理方法包括废弃生物质的干燥、粉碎，所得粉碎生物质与硝酸盐溶液混合并超声、溶液干燥得到