Abstract: Abstract:The application of fluidized ash material level detector in dense phase positive pressure ash conveying system of electrostatic precipitator was introduced. The working process of the electrostatic precipitator and the relation between variation of material level of ash hopper and the working condition of the precipitator were expounded. The importance to detect the material level of the ash hopper and the ash fluidization status were described. The fluidized ash material level detector was recommended for supervision of the ash hopper material level of electrostatic precipitator and the fluidization status. By the measure, the automatic control of ash hopper material level was realized, and the operation reliability and the ash conveying efficiency of the electrostatic precipitator were improved. At the same time, the supervision results provide theoretical foundation for operation analysis of air and gas system and coal pulverizing system of the boiler and the environmental emission reducing.

Key words: Keywords:material level of ash hopper of electrostatic precipitator, dense phase positive pressure pneumatic ash conveying, fluidized ash material level detector, optimal spark rate, material level disturbance of ash hopper