高过滤精度的电膜除尘器的试验研究和应用分析
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摘要
高过滤精度的电膜除尘器采用可荷电纳米滤膜,结合电除尘的对细颗粒的荷电凝并、静电吸附功能与滤膜除尘的过滤功能,取长补短形成一种新式电膜除尘器。试验通过对除尘效率、显微镜图、电镜图的对比和分析,表明膜除尘器加荷电功能成为电膜除尘器后,对细颗粒物的净化效率可提高30%以上,可实现粉尘浓度低于1 mg/m~3的超低排放指标。
Membrane-based electrostatic precipitator is a new electrostatic precipitator that uses woven membrane as its collecting plate. It overcomes some defects of the traditional electrostatic precipitators, enhances the dust removal efficiency and saves the cost. The research has been conducted on both bench and pilot scales with novel electrostatic precipitation using nanofilter membrane. Two types of membranes collector were used for testing-the charged and uncharged membranes substrate. Tests were performed to measure the collection efficiency of the membranes. The result indicated that uncharged membrane is effective as charged membrane plates as a collection surface in a bench-scale ESP for the capture of PM2.5, but the charged membrane has a higher efficiency when particle size is lower than 0.3 μm, which is more suitable for collecting fine particulates. The preliminary data of the pilot-scale experimental also indicated that charged membranes exhibited excellent particulate capture efficiencies for welding flue gas, and the collection efficiency was reached 99.1 %, which can achieve an ultra-low concentration emission of flue gas less than 1 mg/m~3.
Membrane-based electrostatic precipitator is a new electrostatic precipitator that uses woven membrane as its collecting plate. It overcomes some defects of the traditional electrostatic precipitators, enhances the dust removal efficiency and saves the cost. The research has been conducted on both bench and pilot scales with novel electrostatic precipitation using nanofilter membrane. Two types of membranes collector were used for testing-the charged and uncharged membranes substrate. Tests were performed to measure the collection efficiency of the membranes. The result indicated that uncharged membrane is effective as charged membrane plates as a collection surface in a bench-scale ESP for the capture of PM2.5, but the charged membrane has a higher efficiency when particle size is lower than 0.3 μm, which is more suitable for collecting fine particulates. The preliminary data of the pilot-scale experimental also indicated that charged membranes exhibited excellent particulate capture efficiencies for welding flue gas, and the collection efficiency was reached 99.1 %, which can achieve an ultra-low concentration emission of flue gas less than 1 mg/m~3.
引文
[1]中国环境报.广东提出八大重点任务42条措施打赢蓝天保卫战[EB/OL].[2018-08-17].
[2]广东省环境保护厅.广东省城市环境空气质量状况[EB/OL][2018].http://www.gdep.gov.cn.
[3]绿色和平.2017年中国365个城市PM2.5浓度排名[EB/OL][2018-01-10].http://www.greenpeace.org.cn/air-pollution-2017-cityranking.
[4]广州市环保局.广州市发布2016年度大气细颗粒物(PM2.5)来源解析研究成果[EB/OL].[2017-06-22].http://www.gz.gov.cn/GZ25/5/201706/d3cdb78c99cc4ad8a1eeac7e5f5cdba1.shtml.
[5]王纯.环境工程技术手册:废气处理工程技术手册[M].1版.北京:化学工业出版社,2012:140.
[6]GBZ/T 192.1-2007,工作场所空气中粉尘测定第1部分:总粉尘浓度[S].
[7]GBZ/T 160.13-2004,工作场所空气中-锰及其化合物的测定方法(第一法)[S].
[8]GB/T 18801-2015,空气净化器[S].
[2]广东省环境保护厅.广东省城市环境空气质量状况[EB/OL][2018].http://www.gdep.gov.cn.
[3]绿色和平.2017年中国365个城市PM2.5浓度排名[EB/OL][2018-01-10].http://www.greenpeace.org.cn/air-pollution-2017-cityranking.
[4]广州市环保局.广州市发布2016年度大气细颗粒物(PM2.5)来源解析研究成果[EB/OL].[2017-06-22].http://www.gz.gov.cn/GZ25/5/201706/d3cdb78c99cc4ad8a1eeac7e5f5cdba1.shtml.
[5]王纯.环境工程技术手册:废气处理工程技术手册[M].1版.北京:化学工业出版社,2012:140.
[6]GBZ/T 192.1-2007,工作场所空气中粉尘测定第1部分:总粉尘浓度[S].
[7]GBZ/T 160.13-2004,工作场所空气中-锰及其化合物的测定方法(第一法)[S].
[8]GB/T 18801-2015,空气净化器[S].