Experimental Research Of Gas Flow Distribution And Dust Sedimentation

Gas flow distribution and dust sedimentation are two important factors affecting the performance of electrostatic precipitator (ESP). Now, based on the research of dust movement and concentration distribution in ESP, some foreign experts advance a new gas flow distribution technology—Skewed Gas Flow Technology(SGFT), which can improve performance of ESP. It changes people's cognition of uniform gas flow standards of ESP. Considering the interaction of the gas flow and dust, this paper carries out some experiments of gas flow distribution and dust sedimentation,which is hoped to perfect the gas flow theory and provide basis for the farther research of SGFT and gas regulating device's design. The conclusion of the thesis is useful for engineering design and application.This paper gains uniform gas flow and skewed gas flow by model experiments through setting inlet gas adjusting devices. Then in both flow condition, this study carries out the model experiments by using cement dust plain sedimentation in ESP, tries to use the dust mass distribution and the grain size distribution to evaluate the influence of gas flow distribute on dust plain sedimentation in ESP, and obtains several conclusions as follows:(1) Based on uniform gas flow, exerting vertical control method to regulate skewed gas flow answer to SGFT and can retain the uniformity of transverse gas for better;(2)Under the distribution condition of uniform gas and skewed gas flow, the change trend of dust sedimentation has an obvious contrast on vertical but coincides on horizontal and longitudinal;(3) Pay attention to the sedimentation of NO.1 electric field above 50% of the total, it exceeds the sum of the other two fields, making NO.1 become a special area;(4) The grain size distribution at each sample order is in accordance with the R- R distribution;(5) Comparing with uniform gas distribution, the grain size distribution in SGF work condition has such a trend—making the percentage of thicker grains in dust particle samples from the lower of ESP reduced while increased from upper, making the grain size distribution in a balanced way.