改进折点的双涡旋极板电除尘器数值模拟

发布时间：2018-02-20 03:30

本文关键词： 双涡旋极板电除尘器 ESP 数值模拟 UDF 电场　出处：《高电压技术》2017年08期 　论文类型：期刊论文

【摘要】：为了解决电除尘器(ESP)超微细粉尘除尘效率低、设计参数不足等问题,设计了1种改良型的双涡旋极板电除尘器,收尘极板为改进折点弧度的双涡旋形式并垂直于气流方向放置,每排极板前面加了1排电极,并采用ANSYS14.0中的FLUENT流体仿真软件对电除尘器除尘区域内的流场进行了数值模拟;设置了极板高度H、极板排间距d、粒径dp等影响参数。模拟结果表明:这种改良型极板的电除尘器弥补了以往设计中由于电极和极板间的距离过大而造成的部分区域电场强度较弱的漏洞;H约为14 mm、d约为110 mm时,收尘区域能形成较为良好的涡旋气流;入口平均气流速度v为3 m/s时,极板缝隙最高气流速度可达8.8 m/s,极板附近气流速度可低至0.5 m/s,压力损失约为260 Pa;颗粒停留时间能增加约3倍。该研究考虑了电场、流场等各方面的因素,使研究科学、准确;这种新电除尘器性能优势十分明显,为设计研究和工业应用提供了相应的参数和依据。
[Abstract]:In order to solve the problems of low dust removal efficiency and insufficient design parameters, a kind of improved double vortex plate electrostatic precipitator was designed. The duplex plate was placed perpendicular to the air flow direction. A row of electrodes is added in front of each plate, and the flow field in the dust removal area of the electrostatic precipitator is numerically simulated by using the FLUENT fluid simulation software in ANSYS14.0. The influence parameters such as the height of the plate, the distance between the electrodes and the diameter DP are set. The simulation results show that the modified ESP can make up part of the area caused by the excessive distance between the electrode and the plate in the past design. When the hole H of weak electric field intensity is about 14 mm / d about 110 mm, A good vortex flow can be formed in the dust collection area, and when the average inlet velocity v is 3 m / s, The maximum airflow velocity of the polar plate slot can reach 8.8 m / s, the air velocity near the polar plate can be as low as 0.5 m / s, the pressure loss is about 260 Pa. the particle residence time can be increased about 3 times. This study takes into account the electric field, flow field and other factors to make the research scientific and accurate. The performance advantage of this new ESP is very obvious, which provides the corresponding parameters and basis for design research and industrial application.
【作者单位】：江苏大学环境与安全工程学院;
【基金】：国家自然科学基金(51278229) 江苏省六大人才峰会基金项目(JNHB-018)~~
【分类号】：X701.2

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