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科技导报
|研究论文
2010
, 28
(06) :
98
-102
高流场中微细粉尘荷电凝并粗化对电捕集效率的影响
全屏
陈志刚1,王少雷1,2,毛首蕾2,王永伟2
作者信息
1. 江苏大学环境学院,江苏镇江 2120132. 大连海事大学环境工程研究所,辽宁大连 116026
通讯作者:
王少雷
Effect of Submicron Dust Charging and Coagulation on Efficiency of ESP in the High Flow
Affiliations
出版时间: 2010-03-28
文章导航
目前电除尘器存在微小颗粒粉尘捕集效率低、本体体积庞大和能耗高等问题。本文基于烟道中粒子动量高,放电通道中离子输运特性较好的特点,将离子源、荷电凝并装置设置于电除尘器前烟道中。实验结果表明,离子浓度随电场强度加大而增加;在高离子动量情况下,烟道中的离子浓度可达到1.97×109/cm3,比现有电除尘器的离子浓度高出2~3个数量级;矩形电晕极优于圆形电晕极,而芒刺电晕极起晕电压低,耗能少,产生离子浓度高且稳定,因此以芒刺电晕极为最佳;中位径为0.2?滋m的硅粉、中位径为6?滋m的滑石粉和两种粉体的混合粉等微细颗粒荷电凝并后被粗化为电除尘器有效捕集的颗粒,电捕集效率显著提高。本实验可在不增加电除尘器室数、不改变原有运行方式和运行参数条件下,有效解决现有电除尘器预荷电离子浓度过低问题,增大其捕集效率。
高流场
/
亚微米粉尘
/
荷电凝并
/
电除尘器效率
Due to the inefficiency of collecting submicron dust, the current electrostatic precipitator(ESP) suffers from disadvantages of great size and much consumed energy. This paper proposes to put the ion source and the charging and coagulation equipment in the flue, to secure a high ion transportation rate with high particle momentum. The results show that the ion density is increased with the increase of the electric field intensity. In the condition of high momentum, the ion density reaches 1.97×109/cm3, 2~3 orders of magnitude higher than that of ESP. Rectangular powered electrodes are shown to be better than circular powered electrodes. The prickle powered electrodes, with low corona onset voltage, consume less power and generate ions of high density in a stable way. So the prickle powered electrodes are the best choice. Median-particle-size of 0.2μm silicon powder, median-particle-size of 6μm talcum powder and the mixed powder of silicon powder and talcum powder were charged and coagulated to big particles. The efficiency of ESP is significantly improved. A charging system equal to a room of ESP can be saved. The problem of low efficiency of the current ESP can be solved without the need to increase the rooms of ESP and to change the running matter and the parameters, but only by making use of the high momentum of charging particles in the flue.
high flow
/
submicron dust
/
charging and coagulation
/
efficiency of ESP
陈志刚;王少雷;毛首蕾;王永伟.
高流场中微细粉尘荷电凝并粗化对电捕集效率的影响.
科技导报,
2010
, 28
(06)
: 98
-102
.
.
Effect of Submicron Dust Charging and Coagulation on Efficiency of ESP in the High Flow[J].
Science & Technology Review ,
2010
, 28
(06)
: 98
-102
.
2010年第28卷第06期
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文章信息
接收时间:2009-11-19
首发时间:2010-03-28
出版时间:2010-03-28
收稿日期:2009-11-19
修回日期:2010-03-16
https://castjournals.cast.org.cn/joweb/kjdb/CN/1242119791750746407
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2种不同金属材料的力学参数
科 Family 属数 Number of genus 种数 Number of species 占总种数比例 Percentage of total species (%) 属 Genus 种数 Number of species 占总种数比例 Percentage of total species (%) 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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