Abstract:According to the characteristics of flue gas by reclaimed copper, it is a reasonable choice to select bag filter for flue gas purification. The influence of temperature resistance of bag filter material on upper limit of smoke temperature, the influence of flue gas dew point on lower limit of smoke temperature, and the determination method of upper limit of smoke temperature and lower limit of smoke temperature are described. In order to ensure the normal operation of bag filter, it is necessary to change "reducing smoke temperature" to "controlling smoke temperature". This paper introduces the design of smoke temperature control, the problems encountered in practice and the measures to solve them, and puts forward the improvement direction.