异形除尘滤芯对撞脉冲喷吹清灰性能研究  

DUST REMOVAL PERFORMANCE OF SPECIAL-SHAPED DUST FILTER ELEMENT BY COLLISION PULSE INJECTION

作　　者：吴泉泉 孙泽文 钟乙琪 吴庆 林子捷 高康泰 李建龙[1] 黄虹[1] 马志飞 吴代赦[1] WU Quanquan;SUN Zewen;ZHONG Yiqi;WU Qing;LIN Zijie;GAO Kangtai;LI Jianlong;HUANG Hong;MA Zhifei;WU Daishe(School of Resources and Environment,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学资源与环境学院,南昌330031

出　　处：《环境工程》2024年第3期108-114,共7页Environmental Engineering

基　　金：国家自然科学基金项目(52064037);江西省主要学科学术和技术带头人培养计划青年人才项目(20225BCJ23027)

摘　　要：为改善除尘滤芯脉冲喷吹清灰不良的问题,以异形滤芯为研究对象,考察了滤芯形状、喷吹角度和喷吹压差组合条件下的脉冲喷吹性能,构建脉冲喷吹的数值模型,运用Ansys Fluent软件对滤芯内部流场进行模拟及分析。结果表明:倒梯形和收缩形滤芯内对撞区的静压较大,梯形和鼓胀形滤芯内静压区较小;喷吹角度从-45°增加到45°,直筒形和收缩形滤芯的喷吹压力和喷吹性能整体表现为先增后降的趋势,最佳喷吹角度为30°;增大喷吹压差PR有助于提高滤芯的喷吹性能,并且压差对于收缩形滤芯喷吹性能的提升要强于直筒形滤芯。总体上,除尘滤芯的收缩形结构有利于提高对撞脉喷清灰性能。To improve the problem of poor pulse cleaning of the filter element,this paper took the special-shaped filter element as the research object,and the pulse injection performance under the combination of filter element shape,nozzle angle,and injection pressure difference was investigated,also the numerical model of pulse injection was built.The flow field inside the filter element was simulated and analyzed by Ansys Fluent software.The results showed that the static pressure in the collision zone of the inverted trapezoid and contractile filter was larger,while that in the trapezoid and bulging filter was smaller.When the nozzle angle increased from-45°to 45°,the injection pressure and performance of the straight cylinder and shrink filter element increased first and then decreased,and the optimal nozzle angle was 30°.Increasing the injection pressure difference PR helped improve the injection performance of the filter element,and the pressure difference had a stronger effect on the injection performance of the shrink filter element than that of the straight cylinder filter element.Generally,the shrinkage structure of the dust filter element is beneficial to improve the cleaning performance of the pulse injection.

关 键 词：异形滤芯 滤芯形状 喷吹角度 脉冲喷吹性能 数值模拟 

分 类 号：X70[环境科学与工程—环境工程]