Study On Charged Fine Particulate Matter Coagulating Behavior Of Coal-fired Flue Gas

China is the foremost producer and consumer of coal in the world. Thermal power generation will inevitably remain the overwhelming indigenous way in the foreseeable future. Reducing pollutant emissions and improving the efficiency of thermal power generating unit are essential for the technology progress in the power generation industry. The capture of fine particulate matter (PM2.5) gets more attention in recent years, which is the key pollutant of haze. Electric agglomeration technology is an effective way.This dissertation introduces not only actuality of particle agglomeration technology but also briefly the experimental equipment called particle electric agglomeration system.The influence of operating parameters including particles properties and electric field properties were investigated. The charging of particle increased with the increase of particle size, decreased with the increase of the initial concentration of particle, increased with the increase of corona electrode spacing, and increased with the increase of charge voltage. In addition, the negative corona was better for charging effects than the positive corona. When the intensity of electric field is same, the charging effects became better with the space of anode electrode plate increasing.The particle concentrations are tested in both inlet and outlet of the charged area and the agglomeration area. The results show that there is a clear link between particle agglomeration efficiency and multiple factors. The details are following:The initial concentration of particle affected agglomeration efficiency from two aspects. On the one hand, the increasing initial concentration of particle led to charging effect reduced, which was not conducive to electric agglomeration. On the other hand, the increasing initial concentration of particle will provide more opportunities for particles to get in contact with each other, which was conducive to electric agglomeration. The charging of particle increased with the increase of charge voltage, which was beneficial for agglomeration efficiency. The agglomeration efficiency shows an upward trend when increasing the power and eletric frencey of AC supply.