Оценка энергоэффективности подвесной нагревательной системы электрической печи для тепловой обработки сыпучих материалов

Abstract

Abstraсt: The article studies heat transfer processes in the working space of the electric furnace firing modules in order to identify additional opportunities to reduce the energy intensity of bulk material firing when using a new heating system. The study includes the modeling of radiant energy transfer from heating elements to the heat-treated medium using a balance-flow method. In addition, a comparative analysis is given to new data and the data obtained earlier on previous modifications of heating systems of similar furnaces when burning vermiculite. The design of a new suspended heating system of firing modules of electric modular trigger furnaces providing high-quality swelling of vermiculite under the reduced by 22.1% specific energy has been developed. The surface temperature of the intumescent vermiculite granules has been calculated. The equation of heater and grain surface temperature relationship has been obtained at a steady temperature. The conducted researches have proved the efficiency of the new design of the suspended heating system of electric modular trigger furnace firing modules. The calculations showed that under otherwise equal conditions the application of the suspended heating system in the furnace modules provides a complete calcination of the vermiculite under reduced to 79.3 kW consumption of electric power.