【摘要】 采用数值模拟方法研究了电晕线直径对静电除尘器性能的影响,分析了电压、风速对不同直径电晕线的除尘效率的影响规律。结果表明,随电晕线直径减小,收尘板处的电荷密度和电场强度都逐渐增大;电晕线附近的电荷密度显著增大,由272增大到778μC/m~3;而电场强度逐渐减小,且场强最低点的位置逐渐靠近电晕线。随电晕线直径减小,大颗粒和小颗粒的除尘效率都逐渐增大。电晕线直径较小时,随着电压增大,大颗粒和小颗粒的除尘效率都逐渐增大;电晕线直径较大时,大颗粒除尘效率的提高程度更显著。随着风速减小,不同电晕线直径的除尘效率都逐渐增大,且小颗粒除尘效率的提高程度相对较显著,0.1μm颗粒的除尘效率提高12.3%。更多还原

【Abstract】 The effects of the corona wire diameter on the performance of the electrostatic precipitator were numerically studied. The influences of the voltage and the gas velocity on the removal efficiency for the corona wires with different diameters were analyzed. The results showed that, with the decreasing of the diameter of the corona wire, the charge density and the electric field strength at the collecting plate increased gradually. The charge density around the corona wire increased from 272 μC/m~3 to 778 μC/m~3,while the electric field strength decreased gradually. The lowest strength position was closed to the corona wire. With the decreasing of the corona wire diameter, the removal efficiency of the large and small particles gradually increased. As for the corona wire with small diameter, the removal efficiency of large and small particles increased with the increasing of the voltage. For the large diameter wire, the removal efficiency of large particles increased obviously. As the gas velocity decreased, the removal efficiency with different corona wire diameters gradually increased. The removal efficiency of the small particles improved significantly. The removal efficiency of 0.1 μm particle improved by 12.3%.更多还原