脉冲喷吹金属滤袋的压力分布影响因素分析  

Analysis of factors affecting pressure distribution of pulse jet metal filter bag

作　　者：秦文茜 张明星[1] 康彦 付海峰 侯力强 张小庆 陈海焱[1] QIN Wenqian;ZHANG Mingxing;KANG Yan;FU Haifeng;HOU Liqiang;ZHANG Xiaoqing;CHEN Haiyan(School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621010,China;Xi'an Filter Metal Materials Co.Ltd.,Xi'an 710000,China)

机构地区：[1]西南科技大学环境与资源学院,绵阳621010 [2]西安菲尔特金属过滤材料有限公司,西安710000

出　　处：《环境工程学报》2020年第2期465-472,共8页Chinese Journal of Environmental Engineering

基　　金：西南科技大学研究生创新基金资助项目(19ycx0048);国家自然科学基金资助项目(51508481);西南科技大学龙山学术人才科研支持计划重点支持项目(18LZX659,17LZX661)。

摘　　要：金属纤维滤袋可直接过滤高温烟气粉尘,解决高温烟气粉尘导致的环境、安全问题,对高温烟气的余热能源回收利用有非常重要的意义。目前,金属滤袋除尘器脉冲喷吹参数是依照传统纤维滤袋器设计的,存在着脉冲瞬时气流导致喷吹清灰失效问题。针对此问题,在脉冲喷吹实验平台上,通过改变喷吹压力、喷吹距离以及喷吹孔径,针对?130 mm×2 000 mm的金属滤袋,利用压力数据采集系统测试喷吹压力0.2~0.6 MPa、喷吹孔径6~14 mm、喷吹距离50~250 mm时,金属滤袋距顶部80、200、600、1 000、1 400和1 800 mm 6个部位的侧壁压力峰值,以探求针对金属滤袋的脉冲喷吹的合理参数。结果表明:2 m金属滤袋的最佳脉冲喷吹孔径为8 mm,最佳喷吹距离为200 mm,最佳喷吹压力为0.5 MPa;此条件下的P1(80 mm)、P2(200 mm)、P3(600 mm)、P4(1 000 mm)、P5(1 400 mm)、P6(1 800 mm)的侧壁压力峰值分别为1 000、1 686、839、746、749和2 005 Pa。金属滤袋的侧壁压力峰值大小排列呈下>上>中的规律。随着喷吹孔径的增大,最优喷吹距离有逐渐减小的趋势。金属滤袋的中、下部(距滤袋口600~1 400 mm)清灰将是未来金属滤袋清灰的重点关注部位。上述研究结果可为金属滤袋的推广发展提供参考。The metal filter bag can be directly used for the filtration of high-temperature flue gas dust, which can solve the environmental and safety problems caused by this dust, and has great significance for the recycling of waste heat energy with the high-temperature flue gas. At present, the pulse-jet parameters of the metal filter bag dust collector are designed according to the traditional fiber filter bag, and the problem of cleaning failure caused by the pulsed instantaneous air flow will occur. In response to this problem, a pulse-jet test platform was used to study the pressure change of a metal filter bag with size of Ф130 mm×2 000 mm. The lateral pressure peaks at six positions of this filter: 80, 200, 600, 1 000, 1 400 and 1 800 mm from the bag opening, were collected by a pressure data acquisition system when the injection pressures were 0.2~0.6 MPa, nozzle apertures were 6~14 mm and jet distances were 50~250 mm. The reasonable parameters for pulse-jet of metal filter bags could be determined. The experimental results show that the optimal pulse-jet nozzle aperture of 2 m-metal filter bag was 8 mm, the optimum jet distance was 200 mm, the optimum jet pressure was 0.5 MPa. Under these conditions the lateral pressure peak values were 1 000, 1 686, 839, 746, 749 and 2 005 Pa at P1(80 mm), P2(200 mm), P3(600 mm), P4(1 000 mm), P5(1 400 mm), and P6(1 800 mm), respectively. The lateral peak pressures of the metal filter bag were in the order of bottom>top>medium. As the jet aperture increased, the optimal jet distance decreased gradually. The dust cleaning at the middle and bottom positions of the metal filter bag(600~1 400 mm from the bag opening) will be the focus in the future. This study could provide a reference for the promotion and development of metal filter bags.

关 键 词：金属滤袋 高温除尘 余热利用 侧壁压力峰值 

分 类 号：X701[环境科学与工程—环境工程]