摘要
利用电袋复合除尘器试验平台,探讨了清洁滤料过滤阻力特性、电场与过滤风速对过滤阻力的影响及本体阻力与测试风量的关系。结果表明:清洁滤料过滤阻力与过滤风速成线性关系,滤料阻力系数为5.39×10~7 m^(-1);无电场作用下,过滤阻力增长率为2.31Pa/min;而65kV电场作用下,过滤阻力增长率仅为0.63Pa/min,主要因为在电场作用下,颗粒层渗透率增大,且荷电粉尘在滤料表面排列疏松,空隙较多,过滤阻力增加慢,可以有效延长喷吹时间,减少喷吹过程对滤袋的冲刷;过滤阻力增长率随过滤风速的增加而增加,过滤风速由0.65m/min增加到0.97m/min,过滤阻力增长率由0.13Pa/min增加到0.63Pa/min;电袋复合除尘器本体阻力(ΔP,Pa)和测试风量(Q,m^3/s)的拟合方程为ΔP=72.15Q^2+25.07Q。
By experimental platform of electrostatic-fabric integrated precipitator, the effect of resistance characteristics of clean filter material, electrostatic field and filtration velocity on filtration resistance, and the relationship between the system pressure drop and gas volume had been discussed. Results indicated that filtration resistance of clean filter material was linearly proportional to filtration velocity, and resistance coefficient of clean filter material was 5.39× 107 m^-1. Under the action of non-electrostatic field, growth rate of filtration resistance of filter material was 2.31 Pa/min while it was only 0.63 Pa/min when the 65 kV electrostatic field worked. The permeability of particles layer increased with the action of electrostatic field and charged dust loosely arranged on the surface of the filter material. Comparison with non-charged dust, more room were occupied by charged dust, which contributed to slow increasement of filtration resistance. So it could effectively extend cleaning cycle and reduce the erosion of filter bag during cleaning processes. Growth rate of filtration resistance increased gradually from 0.13 Pa/min to 0.63 Pa/min with rising filtration velocity from 0.65 m/min to 0.97 m/min. The computational formula between the system pressure drop （AP,Pa） and gas volume （Q,m^3/s） was expressed as △P=72.15Q2＋25.07Q.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2017年第1期50-53,59,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.51408455)
关键词
电袋复合除尘器
过滤阻力
过滤风速
本体阻力
electrostatic-fabric integrated precipitator
filtration resistance
filtration velocity
pressure drop
