| 荷电气固两相流动凝并特性试验 |
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| 引用本文： | 闻建龙,张星,王志强. 荷电气固两相流动凝并特性试验[J]. 排灌机械, 2009, 27(5): 337-340 |
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| 作者姓名： | 闻建龙 张星 王志强 |
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| 作者单位： | 江苏大学,能源与动力工程学院,江苏,镇江,212013 |
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| 基金项目： | 江苏省自然科学基金资助项目 |
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| 摘 要： | 采用传统除尘设备很难有效清除亚微米粉尘,而静电凝并是净化亚微米粉尘的有效方法.设计了一种静电凝并试验装置,以电厂飞灰为实验粉尘,对其荷电性能及凝并沉积性能进行了试验研究.飞灰粉尘直径在0.5-10μm之间,绝大多数在2-10μm之间.试验结果表明：荷电颗粒的荷质比随荷电电压值的升高呈现非线性方式增长,粉尘颗粒更容易荷负电;凝并沉积效率随风速的增大及浓度的减小而增加,随荷电电压绝对值的升高而增加;在双极非对称荷电组合电压＋25 kV/-23 kV时具有最高的凝并沉积效率.荷电后粉尘的粒径分布情况表明,在荷电段出口处,10μm以上颗粒的粒径频率分布有了明显的增加.
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| 关 键 词： | 气固两相流 静电 亚微米 凝并 沉积效率 |
Experimental study on agglomeration of charged gas solid two phase flow |
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| Wen Jianlong,Zhang Xing,Wang Zhiqiang. Experimental study on agglomeration of charged gas solid two phase flow[J]. Drainage and Irrigation Machinery, 2009, 27(5): 337-340 |
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| Authors: | Wen Jianlong Zhang Xing Wang Zhiqiang |
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| Affiliation: | ( School of Energy and Power Engineering, Jiangsu University, Zhenjing, Jiangsu 212013 ,China) |
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| Abstract: | Traditional dust removal equipment is difficult to remove sub-micron dust effectively while e- lectrostatic coagulation is an effective way to clean sub-micron dust. By designing a test-bed and using fly-ash as experimental dirt, performance of charge and deposition was studied. Result shows a non-liner rise of charge-mass ratio with charging voltage ascending, an increase of coagulation-deposition efficiency with wind speed increasing, concentration debasing and charging voltage rising, and the highest coagulation-deposition efficiency at ＋ 25 kV/-23 kV under asymmetrical bipolar charging voltage. The distribution of the diameter of the dust after charging shows that, in the entry, the dust diameter of 10 μm is increased markedly. |
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| Keywords: | gas-solid two-phase flow electrostatic sub-micron coagulation deposition efficiency |
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