组合式滤筒脉冲反吹清灰过程的数值模拟研究  

Numerical Simulation of the Pulsejet Backblow Ash Removal Process of a Combined Cartridge Filter

作　　者：祝叶[1,2] 左丹[1,2] 杨晓光[3] 鄢恒飞 龙新平 季斌[1,4] Zhu Ye;Zuo Dan;Yang Xiaoguang;Yan Hengfei;Long Xinping;Ji Bin(Water Jet Theory and Technology Hubei Provincial Key Laboratory,Wuhan University,Wuhan 430072,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China;Jiujiang Qisuo Precise Electromechanical Technology Co.,Ltd.,Jiujiang 332000,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水射流理论与技术湖北省重点实验室,武汉430072 [2]武汉大学动力与机械学院,武汉430072 [3]九江七所精密机电科技有限公司,江西九江332000 [4]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《流体机械》2020年第9期23-28,共6页Fluid Machinery

基　　金：江西省重大科技专项项目(20182ABC28005)。

摘　　要：滤筒除尘器的关键技术是清灰技术,清灰效果关系到滤筒除尘器的效率、滤筒使用寿命及运行经济效益等各项指标,因此对滤筒除尘器的清灰性能研究具有重要意义。本文利用FLUENT软件,对2种不同喷嘴型式的组合式滤筒进行了脉冲反吹清灰过程的数值模拟,分析不同喷嘴模型下滤筒内的速度场以及压力场,从固定监测点和沿流向2个方向探究不同模型清灰时滤筒侧壁的压差峰值和压差峰值到达时间情况,以及不同喷嘴型式对滤筒清灰性能的影响。结果表明无散射器拉法尔喷嘴对组合式滤筒清灰效果比带散射器拉法尔喷嘴好,散射器的作用虽然对上滤筒清灰效果有明显改善,但对于下滤筒清灰效果较差。本文成果可为解决组合式滤筒清灰问题提供指导作用。The key technology of the cartridge filter is the ash removal technology.The ash-removal effect has a bearing on such indexes as the efficiency of the cartridge filter,the service life of the cartridge and the operating economic benefits of the cartridge filter.Therefore,it is of great significance to study the ash-removal performance of the cartridge filter.The numerical simulation of pulse backblow ash removal process was carried out for a combined cartridge filter with two different nozzle types using the Fluent software.The velocity field and pressure field in the filter cartridge with different nozzle models were analyzed,and the differential pressure peak value and arrival time of differential pressure peak at the filter cartridge sidewalls were investigated from the perspective of the fixed monitoring points and the flow direction.And the influence of different nozzle forms on the ashremoval performance of the cartridge filter was also explored.The results show that the Rafael nozzle without tapered diffuser has better cleaning effect on the combined cartridge filter compared to the nozzle with tapered diffuser.Although the role of the diffuser obviously improves the ash removal effect at the upper filter cartridge,it has weak ash removal effect for the lower filter cartridge.The present research results can provide a guidance for solving the ash removal problem of the combined pulse-jet backblow cartridge filter.

关 键 词：滤筒除尘器 喷嘴 射流 数值模拟 

分 类 号：TH12[机械工程—机械设计及理论] K72[历史地理—历史学]