• 关键词：湿式静电除尘  细颗粒物  除尘效率  溢流

• 基金项目：浙江省自然科学基金（No.LY13E060007）；浙江省重点科技创新团队项目（No.2011R50017）

• 甘晨浩
• 1. 中国计量大学计量测试工程学院, 杭州 310018;2. 浙江大学热能工程研究所, 能源清洁利用国家重点实验室, 杭州 310027

• 郑成航
• 浙江大学热能工程研究所, 能源清洁利用国家重点实验室, 杭州 310027

• 杨正大
• 浙江大学热能工程研究所, 能源清洁利用国家重点实验室, 杭州 310027

• 高翔
• 浙江大学热能工程研究所, 能源清洁利用国家重点实验室, 杭州 310027

• 徐鸿
• 中国计量大学计量测试工程学院, 杭州 310018

• 摘要：搭建了蜂窝湿式静电除尘实验台，研究了不同清灰方式下湿式静电除尘的放电特性、除尘效率、分级效率。结果发现，喷淋清灰方式对颗粒物脱除效率最高，溢流清灰方式其次。为了避免喷淋产生的水雾对除尘效率的不稳定影响，着重研究了溢流清灰方式下，湿式静电除尘器比收尘面积、运行电压、烟气初始浓度对除尘效率的影响。研究表明，提高比收尘面积和运行电压均可使除尘效率增加，通过观察颗粒物分级脱除效率发现，粒径段在0.5~1 μm之间的颗粒物脱除效率较低。当烟气含尘浓度达到较高值（442.85 mg·m^-3）时，除尘器仍可保持较高的除尘效率。

• Abstract：A honeycomb experimental-scale wet electrostatic precipitator (WESP) was built and the characteristics of corona discharge, particle collection efficiency, and particle grade efficiency were investigated and compared with different dust cleaning methods. It was found that the particle collection efficiency on spray cleaning method was the highest, followed by the overflow cleaning method. The influence of specific collecting area, applied voltage and inlet particle concentration in the flue gas on the particle collection efficiency was studied under overflow cleaning method in order to avoid the influence of spray droplets on particle collection efficiency. The results showed that increasing specific collection area and applied voltage can both improve the particle collection efficiency and particles of size 0.5~1 μm diameter were removed less efficiently by observing the particle grade efficiency. When the particle concentration in the flue gas reached a high value (442.85 mg·m^-3), the wet electrostatic precipitator still showed an excellent collection performance.

• Key words：wet electrostatic precipitator  fine particulate matter  collection efficiency  overflow

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