振打清灰对电除尘器排放的影响:实验基础研究

发布时间：2018-03-13 13:50

本文选题：ESP　切入点：阳极振打　出处：《高电压技术》2017年08期 　论文类型：期刊论文

【摘要】：为了研究不同条件下电除尘器(ESP)内阳极振打时的二次扬尘,用相机拍摄了振打时粉尘层在阳极板上的剥离过程,并用电子低压冲击仪(ELPI)测试了ESP出口粉尘质量浓度,确定了最佳振打加速度和最佳振打粉尘层厚度。结果表明:粉尘层厚度越大,将阳极板振打干净所需的振打加速度就越小;粉尘层厚度相同时,改变振打时运行电压和收尘时运行电压都会影响振打时的二次扬尘质量浓度,并且振打时运行电压对二次扬尘质量浓度的影响明显大于收尘时运行电压对二次扬尘质量浓度的影响;在相同粉尘层厚度下,负极性电源的振打时运行电压绝对值从0增大到15 k V时,振打二次扬尘质量浓度减少了5.25 mg/m~3,收尘时运行电压绝对值从20 k V增大到35 k V时,振打二次扬尘质量浓度只减少了1.44 mg/m~3。综上所述,从减少振打时产生二次扬尘的角度,振打时应该保持较高的运行电压,且粉尘层厚度不宜小于4 mm。
[Abstract]:In order to study the secondary dust during anodic vibration in ESP under different conditions, the stripping process of dust layer on the anode plate was photographed by camera, and the mass concentration of dust at the outlet of ESP was measured by electron low pressure impact meter (ELPI). The results show that the greater the thickness of dust layer, the smaller the vibration acceleration required to clean the anode plate, and when the thickness of dust layer is the same, Changing the operating voltage during vibration and dust collection will affect the mass concentration of secondary hoisting dust. And the effect of operation voltage on the mass concentration of secondary dust is obviously greater than that on the mass concentration of secondary dust in the case of dust collection, and under the same dust layer thickness, the influence of operating voltage on the mass concentration of secondary dust is obviously greater than that of operation voltage during dust collection. When the absolute value of operating voltage increases from 0 to 15 kV, the mass concentration of secondary lifting dust decreases by 5.25 mg / m ~ 3, and the absolute value of operating voltage increases from 20 kV to 35 kV. The mass concentration of secondary hoisting dust is only reduced by 1.44 mg 路m ~ (-1) 路m ~ (3). In conclusion, from the angle of reducing the secondary dusts, the operating voltage should be kept high and the thickness of dust layer should not be less than 4 mm.
【作者单位】：浙江大学化学工程与生物工程学院工业生态与环境工程研究所;
【基金】：国家自然科学基金(21276232) 浙江省公益基金(2014C33022)~~
【分类号】：X773

【相似文献】