Parameter Research And Simulation Of Wet Rotating Reticular Plate Electrostatic Precipitator

Dust emission of the steel industry accounts for about a quarter of the entireindustrial dust emission, and sintering machine is the main dust source of steel industry.Electrostatic precipitator and bag filter are both efficient dust separators, but with thecharacteristics of sintering flue gas, bag filter is constrained to be applied to the head ofsintering machine, so electrostatic precipitator is still the preferred choice of flue gastreatment. However, as the promulgation of more strict air pollutant emission standards,the conventional electrostatic precipitator is becoming more and more difficult to meetthe requirements. Although dry rotating plate electrostatic precipitator being usedcurrently can meet the industry requirements, it is still difficult to collect fine dust. So inthis paper, on the basis of dry rotating plate electrostatic precipitator, and the advantagesof wet electrostatic precipitator and film electrostatic precipitator also being taken intoaccount, wet rotating reticular plate electrostatic precipitator has been put forward, whichcan not only increase the dust collecting area, but also improve the ability of fine dustcollecting, so as to improve the overall efficiency of dust removal and make the dustemissions concentration of sintering machine head greatly lower than current standards.First of all, the formula of dust collecting area was derived, and according to theparameters of the electrostatic precipitator applied to the head of sintering machine,redesigned the wet rotating reticular plate electrostatic precipitator.Secondly, by using FLUENT software, the internal flow field of the electrostaticprecipitator model which was simplified was numerically simulated. Through settingcertain of guide plates, internal flow field was optimized, and the effect of outlet diffuserdimensions on the flow field was also analyzed.Then, a2D electric field model was established, which utilized discharge needle ascorona polar instead of round wire. MHD module of FLUENT software was used tosimulate the electric field, and the influence of space charge on the electric field and theeffect of operating voltage on the trajectory of dust were analyzed, the trajectory of dustwith different size under the same operating voltage was also obtained. Finally, internal flow field was simulated under the condition of spray. In order toreduce the influence of spray on the flow field, overflow was utilized to remove dustinstead of spray. Afterwards the internal flow field of overflow pipe was simulated whichconsists of double tubes. In order to obtain even outlet velocity and even water film, thezone between two layers of the overflow tube was filled with fiber fabric, which madethe even outlet velocity obtained.