以燃煤飞灰为实验粉尘，旋转填料床(RPB)为除尘设备，研究了超重力湿法脱除低浓度(200 mg/m3)粉尘的适宜条件，测定了分级效率；降低入口粉尘浓度考察了旋转填料床高效处理粉尘的浓度范围. 结果表明，入口粉尘浓度为200 mg/m3时，在超重力因子163、气量400 m3/h、液量0.5 m3/h的条件下，除尘效率高达93.18%. 超重力旋转填料床的切割粒径dc?0.08 μm，粒径2.5 μm的粉尘的脱除效率为95%?99.75%. 入口粉尘浓度低至30 mg/m3时，除尘效率可达81.25%.

Effect of high gravity factor, gas flow rate, and liquid flow rate on dust removal efficiency of a rotating packed bed (RPB) was investigated at dust concentration as low as 200 mg/m3, in which coal-fired fly ash and RPB were used as experimental dust and dust removal equipment, respectively. The grade collection efficiency of the RPB was carried out and the concentration range of dust that removed effeciently by RPB was explored at dust concentration lower than 200 mg/m3. Results show that, at conditions that high gravity factor of 163, gas flow rate of 400 m3/h, and liquid flow rate of 0.5 m3/h, dust removal efficiency is as high as 93.18% for a 200 mg/m3 inlet dust concentration. Grade collection efficiency curves show that the cut size of a RPB is about 0.08 μm, dust removal efficiency for particle size of 2.5 μm is approximately 95%?99.75%. Dust removal efficiency is 81.25% with inlet dust concentration of 30 mg/m3.