Method for treatment of plant raw material pellets

摘要

The present invention relates to the technology of plant raw material treatment for obtaining fuel. An object of this invention is to enhance the heating value of the fuel, simultaneously decreasing the energy costs. According to the present invention, the object is achieved by exposure plant raw material pellets to a high-frequency electromagnetic field at frequency in a range of 13.5 MHz to 2.45 GHz during 120-200 s, until the temperature of surface of pellets reaches 410-450K. In the proposed method, the treatment of pellets is carried out at relatively low temperatures (up to 450K), when a thermal decomposition of hemicelluloses and celluloses still does not occur, but the moisture content in the pellets decreases, while increasing the rate of thermal decomposition of pellets, and increasing a heating value thereof, intensifying the burnout of volatile compounds and providing more complete combustion in a domestic heating boiler The activation of the thermal decomposition of pellets and the enhancement of heating value due to microwave pre-treatment may be used also to increase the gasifier capacity and the amount of the energy generated by the integrated gasifier and internal combustion engine