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

Jingcai CHANG; Xiang WANG; Peng WANG; Lin CUI; Jun LI; Xin ZHANG; Chunyuan MA

doi:10.11949/j.issn.0438-1157.20180546

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

Fluid dynamics and transport phenomena | 更新时间：2026-07-24

- Evaporation characteristics of water film over collecting electrode in high-voltage electrical field
- CIESC Journal Vol. 70, Issue 3, Pages: 865-873(2019)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180546
  CLC： TK 16
- Received：23 May 2018，
  
  Revised：2018-12-21，
  
  Online First：24 July 2026，
  
  Published：05 March 2019
- 稿件说明：
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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

CHANG Jingcai, WANG Xiang, WANG Peng, CUI Lin, LI Jun, ZHANG Xin, MA Chunyuan. Evaporation characteristics of water film over collecting electrode in high-voltage electrical field[J]. CIESC Journal, 2019, 70(3): 865-873
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 DOI： 10.11949/j.issn.0438-1157.20180546.

CHANG Jingcai, WANG Xiang, WANG Peng, CUI Lin, LI Jun, ZHANG Xin, MA Chunyuan. Evaporation characteristics of water film over collecting electrode in high-voltage electrical field[J]. CIESC Journal, 2019, 70(3): 865-873 DOI： 10.11949/j.issn.0438-1157.20180546.

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（

＜20 kV）后快速上升（

＞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。

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 (

＜20 kV) and then increases rapidly (

＞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.

关键词

Keywords

references

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