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This study analyzes the dynamic characteristics of duplex inlet and outlet ball mill direct firing pulverizing system. A mass and energy balance-based model is built by thermodynamic analysis. As a critical parameter in pulverized coal humidity control, coal moisture is considered in the mechanism model, and an extended Kalman filter is ...







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Power plant performance and reliability are greatly influenced by the coal mill. To avoid abnormal operating conditions of coal mills in time and effectively, a dual fault warning method for coal mill is proposed. Three typical faults of coal mill plugging, coal breakage and deflagration are warned by this method.



Figure1. Line diagram representing coal pulverization ball mill used in coal power plant There are total nine numbers BBD mills installed in three Units of Panipat Thermal Power Station. Each Unit is having three mills. Ball tube mills model BBD-4772 are installed in Unit-7 & 8 with coal crushing capacity as 75.9 Tons/Hour for













Lee (1986) proposed a model in which all important processes occurring inside the mills are modeled based on the fundamental physical laws. Coal particles are divided into nine discrete sizes. Drag force, momentum, and energy conservation equations are combined to compute the pressure drop and temperature profiles.
