基于扩散器与文氏管的除尘滤筒脉冲喷吹清灰性能改进  

Improvement of pulse-jet cleaning performance of dust-cleaning filter cartridge based on diffuser and venture-tube

作　　者：孟冬 许学瑞[1] 赵颖 解洪波 王飞 李建龙[2] MENG Dong;XU Xuerui;ZHAO Ying;XIE Hongbo;WANG Fei;LI Jianlong(China Academy of Safety Science and Technology,Beijing 100012,China;School of Resources&Environment,Nanchang University,Nanchang 330031,China)

机构地区：[1]中国安全生产科学研究院,北京100012 [2]南昌大学资源与环境学院,江西南昌330031

出　　处：《煤矿安全》2023年第6期54-59,共6页Safety in Coal Mines

基　　金：中国安全生产科学研究院基本科研业务费专项资金资助项目(2021JBKY07)。

摘　　要：为了解决除尘滤筒清灰不良的问题,实验探究了扩散器和文氏管的增设对除尘滤筒脉冲喷吹性能的改善作用,分析了喷吹距离对喷吹压力、喷吹强度和均匀性的影响,对比了过滤-清灰运行阶段过滤阻力的演变。结果表明:扩散器或文氏管均能促进射流扩展、使得喷吹气流更加均匀,但二者组合会增加较大的气流阻力,导致喷吹压力降低;在普通喷吹、仅增设扩散器或文氏管3种情况下,喷吹强度均随喷吹距离先增后降;在喷吹距离小于200 mm时,扩散器和文氏管的单独或组合增设均有利于提高喷吹的均匀性;在喷吹距离为100 mm、仅增设扩散器的喷吹条件下,喷吹性能最佳,且过滤周期较普通喷吹条件延长了1.3倍。To solve the problem of incomplete cleaning of dust filter cartridge,the effect of the installation of diffuser and venturetube on the pulsed-jet performance for dust cleaning filter cartridge was experimentally investigated.The effects of the jet distance on the pulse-jet pressure,the pulsed-jet intensity and uniformity were analyzed.The evolution of the filtration resistance during the stages of dust filtration and cleaning operation were compared.The results show that both diffuser and venture-tube could promote the pulse jet to expand and achieve a more uniform jet flow,but the combination of the diffuser and venture-tube would increase the airflow resistance,resulting in a lower pulsed-jet pressure.The pulsed-jet intensity increased first and then decreased with the jet distance under the conditions of common jet,the diffuser or the venture-tube installed only.When the jet distance was lower than 200 mm,the addition of diffuser and venture-tube alone or in combination is beneficial to improve the uniformity of injection.The best performance was achieved under the condition of 100 mm jet distance and the diffuser install only,with filtration period 1.3 times longer than that under the common pulse jet cleaning condition.

关 键 词：除尘滤筒 脉冲喷吹 清灰性能 扩散器 文氏管 

分 类 号：TD714.4[矿业工程—矿井通风与安全]