Experimental study on graded capture performance of fine particles with electrostatic-fabric integrated precipitator

As the national environmental protection emission standards become increasingly stringent, achieving ultralow emission for thermal power plants has become an urgent requirement. In this study, a 4000 m(3)/h electrostatic-fabric integrated precipitator was installed to optimize the technical parameters of the process, including the inlet air volume, cathode type, inlet dust concentration, and voltage. Some significant conclusions were reached. The charging effect of a needlewire cathodewas slightly better than that of a barbedwire cathode under identical working conditions. As the voltage increased, the graded dust removal efficiency of the electric zone of the integrated precipitator increased remarkably, but the total dust removal efficiency did not change much. Furthermore, the inlet air volume has a great impact on the precipitator outlet concentration, but inlet dust concentration had a relatively smaller effect. After optimization, the total dust removal efficiency was greater than 99.9%. Thus, the proposed optimization strategy can serve as a useful reference for the application of clean coal combustion technology. (c) 2022 Elsevier B.V. All rights reserved.