无电晕式高温高压静电除尘器的数值模拟

基于实验研究结果，对无电晕式高温高压静电除尘器的阴极电子发射、粉尘荷电、浓度扩散、烟气流动、尘粒捕集等过程进行了数值模拟，从理论上分析讨论了温度、压力、电压、流速、含尘浓度、比电阻以及粒径等因素对除尘效率的影响，计算结果与实验结果基本吻合。研究发现，与传统的电晕式静电除尘器不同，无电晕式静电除尘器可以在较高含尘浓度和较低电压下正常工作，且特别适用于高温(高压)烟气的除尘。图11参6

Numerical Simulation for the Non-Corona High-Temperature and High-Pressure Electrostatic Precipitator

Based on the experimental results, numerical simulations on electron emission, dust charging, particle diffusion, flue gas flow and dust precipitation in non-corona gigh-temperature and high-pressure electrostatic precipitator were completed. The influence of variables including temperature, pressure, voltage, velocity of flow, particle concentration in flow, dust specific resistance and its size on the precipitation efficiency was theoretically analyzed and discussed. The results of simulation are in good agreement with the experimental results. It was discovered that unlike conventional ESP, the non-corona electrostatic precipitator can work effectively in high dust concentration and low voltage, and is especially suitable for the precipitation of high-temperature ( high-pressure ) flue gases. Figs 11 and refs 6.