Study on Non-steady Collection Theory for Dust of Electrostatic Precipitator
The traditional electrostatic collection theory lacked quantitative description for the effect to collection efficiency from dust layer deposited on the collection plates of ESP. To further improve the collection efficiency of ESP especially for high-resistivity dust and perfect electrostatic collection theory, the dust layer how effect collection efficiency should be revealed more accurately. Taking dust layer as research object and theoretically analyzing the charge distribution of dust layer used basic principles of electrostatics and Ohm’s Law, the formula of the amount of accumulated charge in dust layer was deduced. The formula of electric-field strength formed by accumulated charges in collection space was deduced according to the principle of constant voltage between electrodes and plates and the potential continuity principle of phase boundary, and the formulas to calculate the effective collecting electric-field and the effective theory migration velocity of charged particles when superimposed this electric-field strength with depolarization electric-field strength of dust layer and initial electric-field strength when had no dust layer were obtained. The theoretical criterion of occurring anti-corona was proposed by theoretical analysis of distribution characteristics of electric-field strength in dust layer. Many phenomena appeared in operating practice of ESP, which contradicted with traditional electrostatic collection theory were explained successfully using theoretical research results. The scientific elaborations in non-steady electrostatic collection theory, which were about dust layer deposited on surface of collection plates how affected operating status of collection space electric-field and collection efficiency, enriched and developed the traditional electrostatic collection theory. These have theoretical guidance for structure designing and the selection of operating parameters of ESP and point out the direction to explore the new ways of improving collection efficiency of high-resistivity dust.
Electrostatic precipitator(ESP) Non-steady collection theory Accumulated charges of dust layer Effective theory migration velocity Anti-corona Collection efficiency
Wenge Hao Mengcheng Li Yan Li
College of Resources and Civil Engineering,Northeastern University,Shenyang,Liaoning110819,China
国际会议
西安
英文
260-275
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）