Powder Technology, Vol.377, 139-148, 2021
Study on the influence of venturi on the cleaning performance of elliptical filter cartridge
Pulse-jet cartridge filter is one of the high efficiency dust collectors for capturing ultra-fine powder. The incomplete cleaning becomes a difficult problem in the application of filter cartridge. However, most of the existing studies are focused on the cleaning performance of the circular cartridge in vertical filters, and there are few studies on the cleaning performance of elliptical horizontal cartridge filters. In this study, the effects of different venturis on the pressure drop of dust collector and the static pressure acting on the inner wall of the elliptical filter cartridge were investigated through numerical simulation and experiment. When the venturi throat diameter is 160 mm, the minimum pressure drop and the maximum peak pulse pressure of the inner wall can be obtained. The mechanism of venturi improving collection efficiency of elliptical filter cartridge is revealed by the flow field analysis method. The magnitude of peak pressure P1 to P3 are about 1.4-2.7, 1.1-1.7 and 1.1-1.4 times that of without venturi. The injection distance and pulse-jet tank pressure can be reduced by venturi. The results are helpful for the design and improvement of pulse-jet cleaning horizontal cartridge filters. (C) 2020 Elsevier B.V. All rights reserved.