The invention belongs to the field of process parameter detection of a
coal-fired power
plant and particularly relates to a monitoring device and a monitoring method for
water content of
coal powder and the
coal type on the basis of multiple sensors. The monitoring device consists of a measuring sensor probe, a
signal processing unit, a data fusion unit and an output display unit, wherein the measuring sensor probe consists of
metal electrodes and a temperature sensors arranged on a primary air pipeline of the coal-fired power
plant, and is used for measuring the speed, electrostatic signals and temperature of primary air
powder. Dynamic parameters and
signal characteristics of the primary air
powder outputted by the
signal processing unit and production parameters of the power
plant are comprehensively analyzed in the data fusion unit, then the
water content of the coal powder and the changing condition of the coal type in the pipeline are obtained, are displayed and stored in the output display unit, and are uploaded to a power-plant
control system. According to the monitoring device and the monitoring method, the structure is simple, the cost is low, the measurement is sensitive, the property is stable, the influence of severe environments is not easily caused, and real-time monitoring for the
water content of the coal powder and the change of the coal type in the primary air pipeline of the coal-fired power plant can be realized.