翼形上进风长袋脉冲袋式除尘器气流特性研究  

Airflow Distribution Characteristics in Wing-upper-inlet-wind Long Pulse-jet Bag Filter

作　　者：李珊红[1,2,3] 唐奇[1,2] 李彩亭[1,2] 方鑫[1,2] 曾光明[1,2] 宋七棣 徐天平 陈安琪 

机构地区：[1]湖南大学环境科学与工程学院 [2]环境生物与控制教育部重点实验室,湖南长沙410082 [3]江苏科林集团有限公司,江苏苏州215021

出　　处：《环境科学与技术》2014年第8期108-111,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目(51108168);中国博士后科学基金面上项目(2011M501271);湖南省科技厅项目(2012RS4001);湖南省自然科学基金项目(13JJ3044);国家高技术研究发展计划资助项目(863计划)(2011AA060803);湖南大学青年教师成长计划

摘　　要：袋式除尘器对超细颗粒物的净化效果较好,增加袋长是提高过滤面积的有效方法,但随滤袋加长,气流均匀性变差,滤袋容易破损,局部积灰严重,滤袋不能得到充分的利用。文章对翼形上进风长袋脉冲袋式除尘器建立几何模型并进行网格划分,基于计算流体动力学(CFD)理论,选取过滤速度为0.5~1.3 m/min和压力出口为-350^-2 000 Pa为边界条件,采用压力-速度耦合的SIMPLE算法,模拟包含Φ130 mm和Φ150 mm,长10 m滤袋的翼形上进风长袋脉冲袋式除尘器的气流分布,考察气流在滤袋空间分布的均匀性。结果表明:翼形上进风方式使得长袋脉冲袋式除尘器内气流分布较均匀;通过Φ150滤袋的气流速度大于Φ130;靠近壁面的滤袋的气流速度大于相应中心滤袋的。该研究可为上进风袋式除尘器的优化设计提供指导和依据。It is high efficient for bag filter to purify ultrafine particulate matter. As filter bag length is one of the effective methods to increase the filter area, with the filter bag lengthening, airflow uniformity becomes poor, filter bag is easy to broken, the deposition is serious and the filter bag can＇t be fully utilized. The 3D geometric model of a wing-upper-inlet- wind pulse- jet bag filter was built and meshed. With filtration velocity 0.5-1.3 m/min and pressure outlet -350^-2 000 Pa, based on the computational fluid dynamics （CFD） theory, the flow characteristics of the wing-upper-inlet-wind bag filter contained ~130 mm and ~150 mm, 10 m long filter bags was simulated, and the uniformity of air flow distribution was investigated. The SIMPLE algorithm was used to solve the coupled pressure and velocity equations. Results showed that the airflow distribution was uniformly in the wing-upper-inlet-wind bag filter. The airflow velocity through φ150mm filter bags was greater than that through φ130 mm and airflow velocity near filter bags wall was also greater than that at center. The study could provide theoretical basis and guideline for the bag filter optimization design.

关 键 词：翼形上进风 脉冲袋式除尘器 数值模拟 气流分布特性 

分 类 号：X701.2[环境科学与工程—环境工程]