湍流电凝聚技术脱除微细粉尘的试验研究  

Experimental study on removing fine dust particles using turbulent electrocoagulation technology

作　　者：陆从相[1] 依蓉婕 依成武 许志鹏[1] LU Congxiang;YI Rongjie;YI Chengwu;XU Zhipeng(School of Automotive and Transportation,Yancheng Polytechnic College,Yancheng 224005,China;School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]盐城工业职业技术学院汽车与交通学院,江苏盐城224005 [2]江苏大学环境与安全工程学院,江苏镇江212013

出　　处：《南京工业大学学报(自然科学版)》2024年第6期644-652,共9页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金面上资助项目(51278229);2024年江苏省青蓝工程优秀青年骨干教师培养对象项目;江苏省产学研合作项目(BY20230409)。

摘　　要：控制燃煤烟气中微细颗粒的排放是大气环境污染治理的首要问题,提高微细粉尘捕集效率已成为众多学者努力的焦点。采用研制的新型“W形”集尘板开展试验,通过单因素试验,考察平均电场强度、烟气停留时间和同极排距对粉尘捕集效率的影响,在此基础上,通过正交分析寻求粉尘捕集效率较高的组合反应参数。结果表明:粉尘捕集效率随着平均电场强度的升高而增大,在湍流电凝聚脱尘装置可以稳定运行的电压范围内,可以通过大幅度提高平均电场强度来提高粉尘捕集效率。需综合考虑烟气处理量和微细粉尘捕集效果来设定烟气停留时间。粉尘捕集效率随同极排距的增大呈现先增大后减小的趋势,同极排距过大或过小都不利于微细粉尘的捕集。当平均电场强度为7 kV/cm、同极排距为100 mm、集尘板有效面积为1.31 m^(2)时,湍流电凝聚脱尘装置的粉尘捕集效率为91.3%。Controlling the emission of fine particles in coal-fired flue gas is the primary issue in air pollution control,and improving fine dust capture efficiency has become a major focus for many scholars.The newly developed“W-type”dust collector was used to carry out the experiment,investigating how the average electric field intensity,residence time of smoke and dust,and co-polar discharge spacing affect dust capture efficiency through single-factor experiments.Based on this,orthogonal analysis was applied to identify the combination of parameters yielding higher dust capture efficiency.The results showed that the dust removal efficiency increased as the average electric field intensity rose,and it could be further improved by significantly increasing the average electric field strength within the stable operating voltage range of the turbulent electrocoagulation dust removal device.It was necessary to comprehensively consider the capacity of smoke and dust treatment and the fine dust capture efficiency when setting the retention time for smoke and dust.Dust collection efficiency initially increased and then decreased with increasing dust collection plate spacing,and excessively large or small spacing was not conducive to efficient fine dust collection.When the average electric field strength was 7 kV/cm,the co-polar spacing was 100 mm,and the effective area of the dust collection plate was 1.31 m^(2),the dust removal efficiency of the turbulent electrocoagulation device was 91.3%.

关 键 词：漩涡 电凝聚 电除尘器 微细粉尘 粉尘捕集效率 

分 类 号：X701.2[环境科学与工程—环境工程]