静电油雾净化器气流分布数值模拟及结构优化

李建; 吴春茂; 亓占丰

doi:10.13205/j.hjgc.202308026

静电油雾净化器气流分布数值模拟及结构优化

doi: 10.13205/j.hjgc.202308026

大连大学机械工程学院, 辽宁大连 116622

基金项目:

国家自然科学基金面上项目(52072055)

详细信息

作者简介:
李建(1981-),男,博士,正高级工程师,主要研究方向为大气污染控制理论及技术研究。cfhi_lj@126.com

通讯作者:
李建(1981-),男,博士,正高级工程师,主要研究方向为大气污染控制理论及技术研究。cfhi_lj@126.com

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出版历程
- 收稿日期: 2022-11-29
- 网络出版日期: 2023-11-15

NUMERICAL SIMULATION OF AIRFLOW DISTRIBUTION AND STRUCTURAL OPTIMIZATION IN AN ELECTROSTATIC OIL MIST PURIFIER

College of Mechanical Engineering, Dalian University, Dalian 116622, China

摘要

摘要: 气流分布均匀性对结构紧凑的静电油雾净化器的净化效率影响较大。以通用的3500 m³/h静电油雾净化器为研究对象,采用数值模拟技术对内部流场进行仿真计算,发现净化器内部存在偏流现象,识别出导致偏流的结构影响因素,提出一种结构优化方案以改善气流分布均匀性,进而提升净化器的净化效率。模拟结果和实验测试表明:结构优化有效改善了净化器内部流场的均匀性,气流速度相对均方根值从0.44降低至0.14;在实际运行中,净化效率从原结构的87.8%提高至92.4%,压力损失仅增加30 Pa。证明通过改善气流分布均匀性来提高净化器的净化效率是可行的,这为其他型号的静电油雾净化器的设计改进与结构优化提供了参考。
- 静电油雾净化器 /
- 气流分布 /
- 数值模拟 /
- 净化效率 /
- 结构优化
Abstract: The uniform airflow distribution greatly influences the purification efficiency of compact electrostatic oil mist purifiers. In order to obtain the local airflow characteristics, the internal flow field of the electrostatic oil mist purifier with an air volume of 3500 m³/h was simulated numerically by CFD, the bias current phenomenon inside the purifier was discovered, and the main influencing factors causing these nonuniform airflow were identified in the original structure. To solve this problem, structure optimization schemes were proposed to improve the airflow distribution uniformity, thereby improving the purification efficiency of the purifier. The simulation and experimental results indicated that compared with the original structure, the airflow distribution uniformity was significantly improved by the structure optimization, and the relative RSME of airflow velocity decreased from 0.44 to 0.14. Then, the experimental results showed that the purifier efficiency with the optimized structure increased from 87.8% to 92.4%, while the total pressure drop only increased by 30 Pa. It was proved feasible to increase the purifier efficiency by improving the airflow distribution uniformity, which had certain reference significance for the design improvement and optimization of the compact electrostatic oil mist purifiers.
- electrostatic oil mist purifier /
- airflow distribution /
- numerical simulation /
- purification efficiency /
- structural optimization

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参考文献(21)

[1]	李建,刘赛.静电式油雾净化器的数值模拟与结构优化[J].一重技术,2019(1):50-54.
[2]	赵靖雯,高稚鸿,朱天乐,等.电极配置和操作条件对静电油烟净化效率的影响[J].环境工程学报,2021,15(2):609-617.
[3]	崔晓慧,侯雪超,张文婷,等.新型错位板对静电除尘器流场影响的数值模拟[J].环境工程学报,2022,16(1):200-207.
[4]	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.
[5]	化亚魏,崔瑞飞,柳家鑫.适用于高浓度的油雾废气静电式净化设备的研究[J].广东化工,2022,49(15):115-117.
[6]	KANG M S,YU G,SHIN J,et al.Collection and decomposition of oil mist via corona discharge and surface dielectric barrier discharge[J].Journal of Hazardous Materials,2021,411:125038.
[7]	LI S S,ZHANG S Y,PAN W X,et al.Experimental and theoretical study of the collection efficiency of the two-stage electrostatic precipitator[J].Powder Technology,2019,356(C):1-9.
[8]	ZHANG S Y,PAN W X,ZHANG H S,et al.High-efficient removal of airborne oil mist in a wire-plate electrostatic precipitator[J].Journal of Electrostatics,2020,108:103516.
[9]	GAO H,LONG Z W,FENG Z B,et al.Numerical simulation of the characteristics of oil mist particles deposition in electrostatic precipitator[J].Process Safety and Environmental Protection,2022,164:335-344.
[10]	BÁLINT N,ISTVÁN B,ISTVÁN K,et al.Advanced risk analysis for the application of ESP-s to clean flammable gas-pollutant mixtures[J].Electrostatic Precipitation,2009:50-53.
[11]	JULIUSZ B.GAJEWSKI.Monitoring of electrostatic fire and explosion hazards at the inlet to electrostatic precipitators[J].Journal of Electrostatics,2014,72(3):192-197.
[12]	纪世昌.静电除尘器气流分布数值模拟[J].环境工程学报,2016,10(4):1956-1960.
[13]	ZHANG J F,LI Z X,LI W,et al.Numerical simulation of air distribution plate at the inlet of wet electrostatic precipitator[J].Applied Mechanics and Materials,2014,2963(494/495):756-762.
[14]	ZHU Y,CHEN C,SHI J W,et al.Enhancement of air purification by unique W-plate structure in two-stage electrostatic precipitator:a novel design for efficient capture of fine particles[J].Advanced Powder Technology,2020,31(4):1643-1658.
[15]	GUDANOV I S,LEBEDEV A E,VATAGIN A A,et al.Ensuring uniform distribution of the gas flow in the active section of EGAV 1-22-15-7-4 electrostatic precipitator[J].Chemical and Petroleum Engineering,2021,57(7/8):583-587.
[16]	王珍,曹文广,彭维明.电除尘器上下游烟道流场分析及优化设计[J].环境工程学报,2016,10(12):7183-7187.
[17]	丁志江,鲁铭源,肖立春.转炉煤气电除尘器气流分布数值模拟[J].环境工程,2015,33(4):92-96.
[18]	张洪明.电除尘器效率公式:多依奇(Deutsch)公式的应用与分析[J].山东电力技术,2001 (6):63-65.
[19]	闫绍兵,袁益超.静电除尘器气流分布研究进展[J].环境工程,2016,34(增刊1):588-592.
[20]	沈艳梅,董琨,崔智勇,等.低低温电除尘器设计烟温的理论计算及存在问题[J].中国电力,2016,49(7):151-156.
[21]	李东阳,刘玺璞,张超.低低温电除尘器除尘效率公式的修正[J].中国电机工程学报,2022,42(7):2623-2630.