Abstract
Fine particles from industrial processes are significantly harmful to people's health and atmospheric environment. However, a number of fine particles are discharged into the air due to the low removal efficiency in traditional precipitators. A novel pretreatment process using the chemical and turbulent agglomeration for fine particles agglomeration was forward. In this study, a pilot-scale containing a chemical agglomeration chamber and a turbulent device connected to an Electric precipitator (ESP) unit has been built to investigate the novel pretreatment effect. Results seem to show that the diameter of particles increases significantly in the pretreatment device, which has a significant positive effect on improving the ESP removal efficiency. The application of turbulent agglomeration leads to the efficiency of PM2.5 increasing from 75.5% to 79.6%, meanwhile, the application of chemical and turbulent agglomeration makes PM2.5 removal efficiency go up to 83.1%. The important factors to agglomeration efficiency were also investigated, furthermore, according to the SEM images and experimental results, the agglomeration models in pretreatment devices were put forward. Finally, combining experimental results and agglomeration modes the coupling of two technologies overcome the disadvantages of each technology, and significantly improve the PM2.5 removal efficiency of ESP.
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