基于非稳态静电收尘理论的电除尘器运行参数的研究  

Study on operation parameters of electrostatic precipitator based on non-steady electrostatic collection theory

作　　者：郝文阁[1] 侯亚平[1] 熊郝旺[1] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110004

出　　处：《环境工程学报》2008年第3期378-382,共5页Chinese Journal of Environmental Engineering

基　　金：国家"863"高技术研究发展计划资助项目(2002AA642010)

摘　　要：为了进一步提高电除尘器的收尘效率，满足国家新的烟尘排放标准，依据研究建立的非稳态静电收集理论，提出了电除尘器供电电压及振打周期的优化措施。非稳态静电收尘理论研究与实验研究表明，收尘效率对供电电压存在一最大值，且此最佳供电电压是随极板沉积粉尘层比电阻、粉尘层厚度等动态变化的；振打周期的长短与粉尘层比电阻有关。据此提出的运行参数优化结果表明，对于比电阻不同的粉尘，电除尘器收尘效率最高时对应的供电电压随粉尘层比电阻的增大而降低，对于同一粉尘，最佳供电电压随粉尘层厚度的增长而提高；粉尘层比电阻低于10^11Ω·cm时，一般保持极板粉尘层厚度在3～5mm以内为佳，对于高比电阻粉尘应寻求适宜的清灰方式保障极板处于清洁状态。In order to improve the collection efficiency of the electrostatic precipitator, the optimization of the applied electric voltage and the shaking periods were established which were based on the non-steady electrostatic collection theory. According to the non-steady collection process and experiment resuhs, it was indicated that the collection efficiency was related to the resistivity of the particles, applied vohage and the thickness of the dust layer during the collection process. The collection efficiency decreases with the increase of the resistivity of the particles. The collection efficiency can reach a maximum when the applied vohage is set an optimal value. The optimization of the operation parameters indicated that the best applied vohage decreased with the increase of the particles resistivity. To the same particles, the optimal voltage increased with the increase of the thickness of the dust layer on the plate. When the particles resistivity was lower than 10^11Ω·cm, the thickness of the dust layer should not exceed 3～5mm, while for the high-resistivity particles which were composed of a poorly conducting material, the suitable shaking periods and de-ashing mode should be adopted in order to make the collecting plate clean.

关 键 词：电除尘器 非稳态 收尘效率 供电电压 振打周期 

分 类 号：X701.2[环境科学与工程—环境工程]