烟气温度对湿式静电除尘器工作特性影响  

Influence of flue gas temperature on working properties of wet electrostatic precipitators

作　　者：杨振民[1] 黄超[1] 王嘉豪 耿婉婷 YANG Zhenmin;HUANG Chao;WANG Jiahao;GENG Wanting(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401

出　　处：《河北工业大学学报》2021年第1期62-67,共6页Journal of Hebei University of Technology

基　　金：河北省自然科学基金(E2018202333);河北省创新能力提升计划项目(19453713D);河北工业大学课程建设项目(121031)。

摘　　要：湿式静电除尘器依靠水膜冲刷进行清灰,实际工作中气流温度对水膜蒸发速率、伏安特性及除尘效率具有一定影响。本文将碳纤维布、PVC刻槽板分别作为湿式静电除尘器的收尘极,用电加热器对进口气流进行加热,研究了除尘器进出口气流含湿量、伏安特性及除尘效率随加热温度的变化规律。结果发现:随着加热温度的提高,相同供水量下的进口气流含湿量逐渐增大;相同供水量及相同加热温度条件下,碳纤维收尘极单位空气水膜蒸发量和水蒸气利用量均大于PVC板。在相同电压下,随着加热温度的提高,电流逐渐增大。相同供水量和加热温度条件下,碳纤维收尘极的电流大于PVC板。在相同供水量下,随着加热温度的提高,除尘效率亦逐渐增大。相同供水量和加热温度条件下碳纤维收尘极的除尘效率高于PVC板。It is by water film scouring that WESPs(wet electrostatic precipitators)clean the dust on the collectors.The temperature of airflow has great influences on the water film evaporation rate,V-I characteristic and dust collection effi⁃ciency.Making carbon fiber fabric and grooved PVC plate as collectors in WESP,heating the inlet airflow to different temperatures,we studied the changing regulations of moisture content of inlet and outlet airflow in WESP,V-I character⁃istics and dust collection efficiencies with the heating temperatures in this paper.It is found that with the increase of heating temperature,the moisture content of inlet airflow under the same water flow rate increases gradually.When the water flow rate and heating temperature are determined,the moisture content of inlet airflow on the carbon fiber fabric is bigger than the grooved PVC plate.Under a determined voltage,with the boost of heating temperature,the electric cur⁃rent becomes larger.With the same water flow rate and heating temperature,the current in the WESP with carbon fiber fabric is larger than that with grooved PVC plate.With the same water flow rate,the dust collection efficiency increases with the enhancement of heating temperature.With the same water flow rate and heating temperature,the collection effi⁃ciency of the carbon fiber fabric is larger than the grooved PVC plate.

关 键 词：气流温度 膜电极 水膜蒸发 伏安特性 除尘效率 

分 类 号：X701.2[环境科学与工程—环境工程]