摘要：利用传热学原理对给定的控制容积建立热平衡方程，分析研 究方程中各项热值的含义并求解该方程即可得到流进和流出控制 容积的干燥剂温度和组成份额等参数，借助于干燥出力核算的方法 来验证所选干燥剂温度参数的合理性。结合MD型双进双出磨煤机 的实际运行数据，从理论上对 MD 磨煤机制粉系统的热工制度进行分析。 

关键词：风扫式磨煤机；热平衡；热力学；气固两相流

Abstract：The heat-balance equation of the control capacities by means of heat transfer principle, was established ，the meaning of every heat value was analysed and the equation was solved , the temperature and constituent of the desiccant was obtained . To verify the rationality of the desiccant temperature, the size and humidity of the product were checked. The thermodynamic system of powder preparation system was discussed theortically according to the practical operation data of MD type coal mill. 

Keywords：air swept coal mill; heat calculation; thermal dynamics; gas-solid two-phase flow