流体机械

2020, v.48;No.575(05) 1-6+48

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静电-旋流除雾器性能的研究
Study on the Defogging Performance of an Electrostatic Cyclone

袁惠新;朱星茼;付双成;周发戚;
Yuan Huixin;Zhu Xingtong;Fu Shuangcheng;Zhou Faqi;School of Mechanical Engineering,Changzhou University;Key Laboratory of Green Process Equipment in Jiangsu Province;

摘要(Abstract):

除雾过程存在于诸多工业过程和环保过程中。本文提出了一种将旋流场与静电场相结合的除雾器,利用数值模拟的方法,分析了静电-旋流除雾器操作性能,并用压力降试验数据验证了模拟的可靠性,同时,分析了入口风速、电压和雾滴粒径对分离性能的影响。结果表明:在入口风速为8~12 m/s时,离心力和电场力对除雾的综合作用最好,分离效率最高;在安全工作电压0~50 kV内,提高电场电压,将有利于提高静电旋流除雾器的除雾效率,施加的电压越高,除雾效率提高的幅度越大;施加电压,使雾滴在离心力和电场力共同作用下被捕集分离,相比于只有离心力作用的情况下除雾效率会大幅度地提高。所以旋流静电除雾器比旋流除雾器能更有效地捕集小雾滴。在旋流器内附设高压静电场,构成静电-旋流除雾器,可在对旋流器结构不作根本性改动、投资少、不扩大占地面积的情况下,显著提高除雾效率,不增加系统阻力,是一种高效除雾设备这种除尘器能保持较高的除雾效率,具有较高的实用价值。
The defogging process exists in many industrial processes and environmental protection processes.In this paper,a demister combining the cyclone field and the electrostatic field was proposed.The performance of the electrostatic-swirl demister was analyzed by numerical simulation method,and the reliability of the simulation was verified by the pressure drop test data.At the same time,the effects of inlet wind speed,voltage and droplet size on separation performance were analyzed.The results show that when the inlet wind speed is 8~12 m/s,the combined effect of centrifugal force and electric field force on demisting is the best,and the separation efficiency is the highest.In the safe working voltage range of 0~50 kV,increasing the electric field voltage will help to improve the demisting efficiency of the electrostatic-swirl demister,the higher the applied voltage,the greater the increase of the demisting efficiency;Therefore,application of the voltage causes the droplets to be trapped and separated under the joint action of centrifugal force and electric field force.Compared with the centrifugal force alone,the demisting efficiency will be greatly improved.Therefore,the electrostatic-swirl demister can capture small droplets more effectively.A high-voltage electrostatic field is attached to the cyclone to form an electrostatic-swirl demister,which can significantly improve the demisting efficiency without increasing system resistance under the condition of not fundamentally changing the structure of the cyclone,less investment and not expanding the floor space,therefore,it is an efficient demisting device.This type of dust collector can maintain a higher demisting efficiency and has higher practical value.

关键词(KeyWords): 旋流分离;静电分离;除雾;压力降;分离效率;流场-电场耦合
cyclonic separation;electrostatic separation;defogging;pressure drop;separation efficiency;flow field-electric field coupling

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基金项目(Foundation): 国家自然科学基金项目(21676031)

作者(Author): 袁惠新;朱星茼;付双成;周发戚;
Yuan Huixin;Zhu Xingtong;Fu Shuangcheng;Zhou Faqi;School of Mechanical Engineering,Changzhou University;Key Laboratory of Green Process Equipment in Jiangsu Province;

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