| More than 60% of the thermoelectric generation sets in Chinese power plants adopt the Tube Coal Mill System with Intermediate Storage Bunker. Although the ball mills can adapt to many kinds of coal and operate safely and reliably with easy maintenance, there is still many problems in existence, that is metal consumption and power consumption of pulverized coal system is high, the ball mills are not suitable for low load operation, then the complex system of the intermediate storage banker is required. With the deepening of the electric system reform in recent years, the problems existing in the Tube Coal Mill System Intermediate Storage Bunker stand out conspicuously, especially for the sets that burn bituminous coal. For this reason, Tengzhou power plant entrust studying to save energy and reduce the power consumption.In this research, Delphi language is adopted to work out calculation procedure of coal-pulverizing system, use this procedure to perform checking calculation, and act as the theoretic basis of operating adjustment. The operation characteristics and controllable parameters are completely studied to reduce the cost. The double-stage separating technique is adopted to improve separation efficiency. The pulverized coal exhauster is reformed based on the outcome of resistance calculation to save power consumption of pulverized system.The wearing problem of steel balls is studied, has set up the stable state mathematics model of steel ball wear to certain load ball system and addition ball system. Make steel balls in the coal mill operate on the best station.During the proceeding of this research, a great deal of theoretical analysis and experiment study were carried out, draw the optimum operation parameter of the pulverized coal preparation system. The renovation scheme was carried into execution on the spot in the power plant. The operation practice proved that power consumption of pulverized coal system reduces 4.5kWh/t, optimize operation adjustment acquired good results.
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