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浙江大学学报(工学版)
能源工程     
湿式静电除尘器喷嘴特性
万益, 黄薇薇, 郑成航, 高翔, 岑可法
浙江大学 热能工程研究所,能源清洁利用国家重点实验室,浙江 杭州 310027
Spray characteristics of wet electrostatic precipitator
WAN Yi, HUANG Wei-wei, ZHENG Cheng-hang, GAO Xiang, CEN Ke-fa
State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China
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摘要:

为优化湿式静电除尘器清灰特性,研究喷嘴特性.采用相位多普勒粒子分析仪(PDA),研究单喷嘴、双喷嘴同轴侧向撞击及喷嘴与壁面碰撞后的雾化特性,实验数据表明液滴撞壁后形态主要由液滴自身动能、液滴表面张力和黏度决定,由韦伯数描述.距离喷嘴位置越远,喷嘴雾化角越大,索特尔平均粒径(SMD)波动越小,韦伯数分布越均匀,液膜均布性越好.在此基础上,对喷嘴布置方式与液膜均布性关系做进一步分析,得到喷淋管间距越大,喷嘴角度越大,极板上水膜更加均匀,该实验结果与喷嘴特性实验相符.

Abstract:

To improve the performance of collecting electrode cleaning, spray nozzles characteristics was studied. With the Phase Droplet Particle Analyzer (PDA) applied on a pilot-scale experiment system, the atomization characteristics during the process of single nozzle atomization, double nozzle spray impingement and spray wall—impingement were studied. The results indicate that motion behavior of the spray wall—impingement is dominantly influenced by initial kinetic energy, surface tension and liquid viscosity which are described by the Weber number. The Sauter mean particle diameter (SMD) and Weber number become more stable when the atomization angle and distance from the atomization axes increase. Nozzle arrangements affect the uniformity of water film as well, which were subsequently studied on a bench-scale experiment system. The results show that the water film uniformity performs better as the atomization angle and distance from the atomization axes increase, which agreed well with the experimental nozzle spray characteristic results from the pilot-scale experiment system.

出版日期: 2015-02-01
:  X 701. 3  
基金资助:

国家杰出青年科学基金资助项目(51125025);国家重点基础研究发展计划资助项目(2013CB228504);国家科技部“十二五”科技支撑计划资助项目

通讯作者: 高翔,男,教授,博导     E-mail: xgao@zju.edu.cn
作者简介: 万益(1989—),女,硕士生,从事电站锅炉的烟气除尘研究.E-mail: dtwanyi@163.com
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引用本文:

万益, 黄薇薇, 郑成航, 高翔, 岑可法. 湿式静电除尘器喷嘴特性[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2015.02.021.

WAN Yi, HUANG Wei-wei, ZHENG Cheng-hang, GAO Xiang, CEN Ke-fa. Spray characteristics of wet electrostatic precipitator. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2015.02.021.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2015.02.021        http://www.zjujournals.com/eng/CN/Y2015/V49/I2/336

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