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Effects of the Overall Length and OD on Opposing-pulse-jet Cleaning for Pleated Filter Cartridges

Category: Control Techniques and Strategy

Volume: 20 | Issue: 3 | Pages: 432-443
DOI: 10.4209/aaqr.2019.10.0527
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To cite this article:
Wu, Q., Li, J., Wu, D. and Chen, D.R. (2020). Effects of the Overall Length and OD on Opposing-pulse-jet Cleaning for Pleated Filter Cartridges. Aerosol Air Qual. Res. 20: 432-443. doi: 10.4209/aaqr.2019.10.0527.

Quanquan Wu1,2, Jianlong Li 1,2, Daishe Wu1, Da-Ren Chen2

  • 1 Key Laboratory of Poyang Lake Environmental and Resource Utilization, Ministry of Education, School of Resources, Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, China
  • 2 Particle Laboratory, Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23294, USA

Highlights

  • Opposing pulse-jet cleaning was studied for pleated cartridges with various length and ODs.
  • The flow collision was much intensified in the core of cartridges with long length and small OD.
  • The pulse intensity and uniformity is found in the bimodal function of delay time.
  • The optimal delay time for opposing jet cleaning increases with the cartridge length.
  • The pressure due to the jet collision is prominent for long and small OD cartridges.

Abstract

Opposing-pulse-jet technology has been proposed as a solution for regenerating filtration media by minimizing the incomplete cleaning of pleated filter cartridges. In this study, we investigated the effects of a pleated filter cartridge’s overall length and outer diameter (OD) on the performance of opposing-pulse-jet cleaning via numerical modeling. For each pleated filter cartridge, the delay time, Δt (defined as the delay in launching the secondary nozzle), was varied to analyze the intensity and the uniformity of the static pressure distribution in the core of the cartridge. It was found that two opposing jet flows collided much more intensely in the core when the length of the overall cartridge, L, was short, and the OD was small. For a given L, the pressure pulse’s performance was maximized by varying Δt. The pulse intensity and uniformity in the filter core can be represented as a bimodal (double-peaked) function of Δt. In general, the pulse intensity was greater when Δt > 0 s than when Δt < 0 s (when the secondary jet was launched before the primary jet).

Keywords

Dust collector Filter cartridge Opposing pulse jet Cleaning quality Length Diameter


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