静电场中极板表面液膜蒸发特性研究

doi:10.11949/j.issn.0438-1157.20180546

化工学报 ›› 2019, Vol. 70 ›› Issue (3): 865-873.DOI: 10.11949/j.issn.0438-1157.20180546

静电场中极板表面液膜蒸发特性研究

常景彩¹(),王翔²,王鹏²,崔琳²,李军²,张鑫³,马春元²

1. 山东大学环境科学与工程学院，山东青岛 266237
2. 山东大学燃煤污染物减排国家工程实验室，山东济南 250061
3. 山东祥桓环保工程有限公司，山东济南 250061

收稿日期:2018-05-23 修回日期:2018-12-21 出版日期:2019-03-05 发布日期:2019-03-05
通讯作者: 常景彩
作者简介:常景彩（1977—），女，博士，高级实验师，<email>changjingcai@126.com</email>
基金资助:
山东省重点研发计划项目(2016CYJS10B02);国家重点研发计划项目(2017YFB0602902)

Evaporation characteristics of water film over collecting electrode in high-voltage electrical field

Jingcai CHANG¹(),Xiang WANG²,Peng WANG²,Lin CUI²,Jun LI²,Xin ZHANG³,Chunyuan MA²

1. School of Environmental Science and Engineering, Shandong University, Qingdao 266237, Shandong, China
2. National Engineering Laboratory for Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, Shandong, China
3. Shandong Xianghuan Environmental Protection Engineering Co., Ltd., Jinan 250061, Shandong, China

Received:2018-05-23 Revised:2018-12-21 Online:2019-03-05 Published:2019-03-05
Contact: Jingcai CHANG

摘要/Abstract

摘要：

以静电场中水分子的极化和受力特性为基础，对热干烟气中极板表面液膜内水分子输运过程进行分析。考察了电场特征、液膜物性对静态高压电场中液膜蒸发特性的影响并提出了蒸发模型；同时研究了多场（温度、速度和静电）耦合作用下液膜蒸发过程中的主导作用机制。结果表明：离子风为静态高压电场中液膜蒸发的主要动力，蒸发速率是自然蒸发的6.7倍（25 kV）。液膜蒸发为等速过程，蒸发速率与电场强度呈正相关关系；液膜加入溶质，蒸发过程受抑制，蒸发模型变为等速和降速两个过程，最终液膜表面析出溶质；流场耦合静电场作用下，液膜蒸发速率随电压升高先缓慢上升（U＜20 kV）后快速上升（U＞20 kV），流速和电压分别是这两阶段的主要影响因素；温度场耦合静电场作用下，蒸发速率大于单场叠加数值。研究结果为热干烟气中极板表面稳定成膜、系统水耗及空间电场中温湿度分布等问题的研究提供理论支撑。

关键词: 蒸发, 传递过程, 膜, 烟道气, 增湿, 电极化, 静电场

Abstract:

Based on the polarization and force characteristics of water molecules in the electrostatic field, the transport process of water molecules in the liquid film on the surface of the plate in hot dry flue gas is analyzed. Besides, the effect of electrical field parameters on the evaporation characteristics and the dominant influence factors in the evaporation process under multi-field coupling effect (temperature, velocity and electrical field) were all studied. Eventually an evaporation model was proposed. The results showed that the ion wind is the main power source in the process of water film evaporation and the electric evaporation rate is 6.7 higher than the natural evaporation rate (25 kV). Water film evaporated at a constant rate and there was a positive relationship between evaporation rate and electrical field intensity. Evaporation process can be inhibited by the dissolved solute in the water film and the process was divided into two periods: constant rate period and falling rate period. The solute precipitated firstly on the water film surface. Under the coupling effect of velocity and electrical field, the evaporation rate increases slowly (U＜20 kV) and then increases rapidly (U＞20 kV) with increasing the voltage, velocity and voltage is the main influence factor in this two processes respectively. Under the coupling effect of temperature and electrical field, the evaporation rate is higher than the superposition of these two single fields. All these results can provide a theoretic support for the water film forming and consumption, humidity distribution in the unsaturated flue gas.

Key words: evaporation, transport processes, film, flue gas, humidification, electric polarization, electrical field

中图分类号:

TK 16

常景彩, 王翔, 王鹏, 崔琳, 李军, 张鑫, 马春元. 静电场中极板表面液膜蒸发特性研究[J]. 化工学报, 2019, 70(3): 865-873.

Jingcai CHANG, Xiang WANG, Peng WANG, Lin CUI, Jun LI, Xin ZHANG, Chunyuan MA. Evaporation characteristics of water film over collecting electrode in high-voltage electrical field[J]. CIESC Journal, 2019, 70(3): 865-873.

图/表 16

图1 实验系统图

Fig.1 Experimental setup

图2 阴极板组件结构图

Fig.2 Schematic of anode and cathode electrode

图3 静电场中极板表面液膜的受力

Fig.3 Force analysis of water film in electrical field

图4 静电场中液膜受力分析

Fig.4 Force analysis of water film in electrical field

图5 电压对液膜蒸发特性的影响

Fig.5 Effect of voltage on water film evaporation characteristics

图6 电压对液膜失重速率的影响

Fig.6 Effect of voltage on water film mass loss rate

图7 异极距对液膜蒸发特性的影响

Fig.7 Effect of interelectrode distance on water film evaporation characteristics

图8 异极距对液膜失重速率的影响

Fig.8 Effect of interelectrode distance on water film mass loss rate

图9 放电点间距对液膜蒸发特性的影响

Fig.9 Effect of electrode interval on water film evaporation characteristics

图10 极板电阻对液膜蒸发特性的影响

Fig.10 Effect of electrode resistivity on water film evaporation characteristics

图11 空间电场强度分布

Fig.11 Distribution of electric field

图12 液膜物性对液膜蒸发特性的影响

Fig.12 Effect of water film properties on evaporation characteristics

图13 液膜浓度对液膜蒸发特性的影响

Fig.13 Effect of concentration of water film on evaporation characteristics

图14 液膜表面析出的晶体

Fig.14 Crystals on water film surface

图15 流场耦合静电场对液膜失重速率的影响

Fig.15 Effect of coupling action of velocity and electrical field on water film mass loss rate

图16 温度场耦合静电场对液膜失重速率的影响

Fig.16 Effect of coupling action of temperature and electrical field on water film mass loss rate

参考文献 30

1	闫克平, 李树然, 冯卫强, 等. 高电压环境工程应用研究关键技术问题分析及展望[J]. 高电压技术, 2015, 41(8): 2528-2544.
	YanK P, LiS R, FengW Q, et al. Analysis and prospect on key technology of high-voltage discharge for environmental engineering study and application[J]. High Voltage Engineering, 2015, 41(8): 2528-2544
2	常景彩, 王翔, 王鹏, 等. 纤维水膜极板表面颗粒沉积脱落特性[J]. 化工学报, 2018, 69(10): 4302-4310.
	ChangJ C, WangX, WangP, et al. Deposition and exfoliation characteristics of collected particles on wet fabrics collector[J]. CIESC Journal, 2018, 69(10): 4302-4310.
3	龚秀娟. 物料干燥系统热湿传递及其交叉作用的热力学分析[D]. 兰州: 兰州理工大学, 2017.
	GongX J. Thermodynamic analysis of heat and moisture transfer and crossing of material drying system[D]. Lanzhou: Lanzhou University of Technology, 2017.
4	SaadiS N, ZhaiZ J. Modeling phase change materials embedded in building enclosure: a review[J]. Renewable and Sustainable Energy Reviews, 2013, 21: 659-673.
5	MandalS, SongG. Thermal sensors for performance evaluation of protective clothing against heat and fire: a review[J]. Textile Research Journal, 2015, 85(1): 101-112.
6	AsakawaY. Promotion and retardation of heat transfer by electric fields[J]. Nature, 1976, 261(5557): 220-221.
7	李里特, 李法德. 高压静电场对蒸馏水蒸发的影响[J]. 农业工程学报, 2001, 17(2): 12-15.
	LiL T, LiF D. Effect of high voltage electrostatic filed on evaporation of distilled water[J]. Transactions of the Chinese Society of Agricultural Engineering, 2001, 17(2): 12-15.
8	季旭, 冷从斌, 李海丽. 高压电场下玉米的干燥特性[J]. 农业工程学报, 2015, 31(8): 264-271.
	JiX, LengC B, LiH L. Drying characteristics of corn in high voltage electric field[J]. Transactions of the Chinese Society of Agricultural Engineering, 2015, 31(8): 264-271.
9	CaoW, NishiyamaY, KoideS. Electro-hydrodynamic drying characteristics of wheat using high voltage electrostatic field[J]. Journal of Food Engineering, 2004, 62(3): 209-213.
10	LaiF C, LaiK W. EHD-enhanced drying with wire electrode[J]. Drying Technology, 2002, 20(7): 1393-1405.
11	那日, 杨体强. 静电干燥特性的研究[J]. 内蒙古大学学报: 自然科学版, 1999, 30(6): 699-705.
	NaR, YangT Q. Study of the characteristics of electrostatics drying[J]. Acta Scientiarum Naturalium Universitatis NeiMongol， 1999, 30(6): 699-705.
12	TadaY, TakimotoA, HayashiY. A review on heat transfer enhancement in a convective field by applying ionic wind[J]. Journal of Enhanced Heat Transfer, 2017, 24(1-6): 517-532.
13	SinghA, OrsatV, RaghavanV. A comprehensive review on electro-hydrodynamic drying and high-voltage electric field in the context of food and bio-processing[J]. Drying Technology, 2012, 30(16): 1812-1820.
14	MartynenkoA, KudraT. Electrically-induced transport phenomena in EHD drying—a review[J]. Trends in Food Science & Technology, 2016, 54: 63-73.
15	梁运章, 丁昌江. 高压电场干燥技术原理的电流体动力学分析[J]. 北京理工大学学报, 2005, (25): 16-19
	LiangY Z, DingC J. EHD analysis of the high voltage electric field drying technology’s principle[J]. Transactions of Beijing Institute Technology, 2005, (25):16-19.
16	孙剑锋. 高压静电场在水分蒸发和物料干燥方面的应用研究[D]. 北京: 中国农业大学, 2004
	SunJ F. Application of high voltage electrostatic fields on water evaporation and material drying[D]. Beijing: China Agricultural University, 2004.
17	TaghianS, HavetM, HamdamiN. Drying of mushroom slices using hot air combined with an electro-hydrodynamic (EHD) drying system [J]. Drying Technology, 2014, 32(5): 597-605.
18	丁昌江．电场对生物物料中水分子输运特性的实验及机理研究[D]. 呼和浩特: 内蒙古大学, 2004.
	DingC J. The experiment and mechanism study of transport character of water molecule on electric field in bio-mateials[D]. Huhhot: Inner Mongolia University, 2004.
19	王翔, 常景彩, 徐纯燕, 等. 线-板式静电除尘器芒刺电晕线放电特性[J]. 高电压技术, 2017, 43(2): 533-540.
	WangX, ChangJ C, XuC Y. Discharge characteristic research for barbed electrodes in wire-plate electrostatic precipitator[J]. High Voltage Engineering, 2017, 43(2): 533-540.
20	IetaA C, KucerovskyZ， GreasonW D. Current density modeling of a linear pin-plane array corona discharge[J]. Journal of Electrostatics, 2008, 66(11): 589-593.
21	LongZ, YaoQ, SongQ. Three-dimensional simulation of electric field and space charge in the advanced hybrid particulate collector [J]. Journal of Electrostatics, 2009, 67(6): 835-843.
22	KudraT, MartynekoA. Energy aspects in electrohydrodynamic drying[J]. Drying Technology, 2015, 33(13): 1534-1540.
23	HashinagaF, KharelG, ShintaniR. Effect of ordinary frequency high electric fields on evaporation and drying[J]. Food Science and Technology International, Tokyo, 1995, 1(2):77-81.
24	BlanchardD, AttenP, DumitranL M. Correlation between current density and layer structure for fine particle deposition in a laboratory electrostatic precipitator[J]. IEEE Transactions on Industry Applications, 2002, 38(3):832-839.
25	JaworekA, KrupaA, CzechT. Modern electrostatic devices and methods for exhaust gas cleaning: a brief review[J]. Journal of Electrostatics, 2007, 65(3): 133-155.
26	BarthakurN N. Electro-hydrodynamic enhancement of evaporation from NaCl solutions[J]. Desalination, 1990, 78(3): 455-465.
27	FarnooshN, AdamiakK, CastleG S P. Three-dimensional analysis of electro-hydrodynamic flow in a spiked electrode-plate electrostatic precipitator[J]. Journal of Electrostatics, 2011, 69(5): 419-428.
28	LaiF C, SharmaR K. EHD-enhanced drying with multiple needle electrode[J]. Journal of Electrostatics, 2005, 63(3/4): 223-237.
29	MantachS, AdamiakK. A double-vortex EHD flow pattern generated by negative corona discharge in point-plane geometry[J]. Journal of Electrostatics, 2018, 93: 118-124.
30	DongM, ZhouF, ZhangY, et al. Numerical study on fine-particle charging and transport behaviour in electrostatic precipitators[J]. Powder Technology, 2018, 330: 210-218.

[1]	吴馨, 龚建英, 靳龙, 王宇涛, 黄睿宁. 超声波激励下铝板表面液滴群输运特性的研究[J]. 化工学报, 2023, 74(S1): 104-112.
[2]	叶展羽, 山訸, 徐震原. 用于太阳能蒸发的折纸式蒸发器性能仿真[J]. 化工学报, 2023, 74(S1): 132-140.
[3]	邵苛苛, 宋孟杰, 江正勇, 张旋, 张龙, 高润淼, 甄泽康. 水平方向上冰中受陷气泡形成和分布实验研究[J]. 化工学报, 2023, 74(S1): 161-164.
[4]	毕丽森, 刘斌, 胡恒祥, 曾涛, 李卓睿, 宋健飞, 吴翰铭. 粗糙界面上纳米液滴蒸发模式的分子动力学研究[J]. 化工学报, 2023, 74(S1): 172-178.
[5]	陈爱强, 代艳奇, 刘悦, 刘斌, 吴翰铭. 基板温度对HFE7100液滴蒸发过程的影响研究[J]. 化工学报, 2023, 74(S1): 191-197.
[6]	王志国, 薛孟, 董芋双, 张田震, 秦晓凯, 韩强. 基于裂隙粗糙性表征方法的地热岩体热流耦合数值模拟与分析[J]. 化工学报, 2023, 74(S1): 223-234.
[7]	吴延鹏, 李晓宇, 钟乔洋. 静电纺丝纳米纤维双疏膜油性细颗粒物过滤性能实验分析[J]. 化工学报, 2023, 74(S1): 259-264.
[8]	晁京伟, 许嘉兴, 李廷贤. 基于无管束蒸发换热强化策略的吸附热池的供热性能研究[J]. 化工学报, 2023, 74(S1): 302-310.
[9]	张化福, 童莉葛, 张振涛, 杨俊玲, 王立, 张俊浩. 机械蒸汽压缩蒸发技术研究现状与发展趋势[J]. 化工学报, 2023, 74(S1): 8-24.
[10]	李艺彤, 郭航, 陈浩, 叶芳. 催化剂非均匀分布的质子交换膜燃料电池操作条件研究[J]. 化工学报, 2023, 74(9): 3831-3840.
[11]	何松, 刘乔迈, 谢广烁, 王斯民, 肖娟. 高浓度水煤浆管道气膜减阻两相流模拟及代理辅助优化[J]. 化工学报, 2023, 74(9): 3766-3774.
[12]	胡建波, 刘洪超, 胡齐, 黄美英, 宋先雨, 赵双良. 有机笼跨细胞膜易位行为的分子动力学模拟研究[J]. 化工学报, 2023, 74(9): 3756-3765.
[13]	齐聪, 丁子, 余杰, 汤茂清, 梁林. 基于选择吸收纳米薄膜的太阳能温差发电特性研究[J]. 化工学报, 2023, 74(9): 3921-3930.
[14]	胡亚丽, 胡军勇, 马素霞, 孙禹坤, 谭学诣, 黄佳欣, 杨奉源. 逆电渗析热机新型工质开发及电化学特性研究[J]. 化工学报, 2023, 74(8): 3513-3521.
[15]	杨越, 张丹, 郑巨淦, 涂茂萍, 杨庆忠. NaCl水溶液喷射闪蒸-掺混蒸发的实验研究[J]. 化工学报, 2023, 74(8): 3279-3291.

静电场中极板表面液膜蒸发特性研究

Evaporation characteristics of water film over collecting electrode in high-voltage electrical field

RichHTML

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

图/表 16

参考文献 30

相关文章 15

编辑推荐

Metrics

本文评价