Numerical study on the design of multi-staged, opposing pulsed-jet cleaning (M-OPJC) for pleated filter cartridges

• Published in: Separation and purification technology Vol. 327; p. 124978
• Main Authors: Gao, Kangtai, Chen, Jianwu, Wu, Quanquan, Wu, Qing, Xu, Jingge, Meng, Dong, Li, Jianlong, Wu, Daishe, Chen, Da-Ren
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2023
• Subjects: Comprehensive pressure; Filter cartridges; Filtration media regeneration; Multi-staged, opposing pulsed-jet cleaning; Patchy cleaning; Pleated filters; Comprehensive pressure; Multi-staged, opposing pulsed-jet cleaning; Pleated filters; Patchy cleaning; Filtration media regeneration; Filter cartridges
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/j.seppur.2023.124978

[Display omitted] •A multi-staged, opposing pulsed-jet cleaning (M-OPJC) is proposed for filter regeneration.•The ratio of pressures at opposing nozzles in OPJC greatly affects the cleaning pressure.•M-OPJC enables the movement of a high-pressure zone along the filter core.•The optimal pressure settings for opposing nozzles in M-OPJC is determined. Opposing pulsed-jet cleaning (OPJC) has recently been proposed as a method to improve the filtration media regeneration of pleated filter cartridges, specifically addressing the patchy cleaning issue typically encountered in conventional pulsed jet cleaning. In this study, we first investigate the effect of pressure ratio (PR, the ratio of pressures at the opposing nozzles) on the OPJC performance in terms of cleaning intensity, uniformity, comprehensive pressure, and cleaning efficiency for pleated filter cartridges. A new OPJC strategy, named multi-staged, opposing pulsed-jet cleaning (M-OPJC), is proposed to enable the movement of a high-pressure region (formed by the collision of the pulsed-jet airflows introduced from opposing nozzles) within the core of a filter cartridge during the cleaning. The M-OPJC divides one cleaning jet cycle into four jetting stages with different PR values. Among all the evaluated cases, the M-OPJC with PR = [1.00, 1.00, 1.33, 2.00] offers the best cleaning performance for a pleated filter cartridge. Compared to conventional pulsed-jet cleaning (i.e., M-OPJC with PR = [0, 0, 0, 0]), the M-OPJC method increased the peak pressure at the cartridge’s upper part by 325.93%, comprehensive pressure by 171.10%, and cleaning efficiency by 48.85%.