Study on Capacitance Transducers for Concentration Measurement of Pulverized Coal in Boiler

ANSYS is used to analyze the sensitivity distribution of sensing field in this paper. A configuration of capacitance electrods which provides a high and homogeneous capacitance sensitivity over the pipe cross section is constructed. A measuring circuit which has low baseline drift, high and stable sensitivity, immunity to stray capacitances and immunity to external electrical interface is designed. Through the test, a perfect performance measuring system for the phase concentration of gas-solid two phases flows is achieved.