Directing against the problems of large amount pyrites discharged from HP type coal pulverizer installed in coal pulverizing system of boilers for 4×630 MW units in Yangzhou No.2 Power Generation Co Ltd

the optimization in adjustment of operating parameters for HP type coal pulverizer and of refratory damper for classifier at outlet of the coal puvlerizer etc.has been carried out

and the pyrites discharged from HP type coal pulverizer have been remixed inito coal feeding into MPS type coal pulverizer for ginding and mixedly burning in the boiler

making the heat of pyrites can be effectively recovered.This move not only can greatly enhance the utilization coefficient of fuel coal

decreasing the net coal consumption in whole power plant

and the limitation of pyrites discharged from HP type coal pulverizer being weakened

as well as the adaptability of coal sorts being widened.