title: Influence of operating parameters on cake formation in pilot scale pulse-jet bag filter.
abstract: Bag filters are commonly used for fine particles removal in off-gas purification. There dust laden gas pervades through permeable filter media starting at a lower pressure drop limit leaving dust (called filter cake) on the filter media. The filter cakeformation is influenced by many factors including filtration velocity, dust concentration, pressure drop limits, and filter media resistance. Effect of the stated parameters is investigated experimentally in a pilot scale pulse-jet bag filter test facility where lime stone dust is separated from air at ambient conditions. Results reveal that filtration velocity significantly affects filter pressure drop as well as cake properties; cake density and specific cake resistance. Cake density is slightly affected by dust concentration. Specific resistance of filter cake increases with velocity, slightly affected by dust concentration, changes inversely with the upper pressure drop limit and decreases over a prolonged use (aging). Specific resistance of filter media is independent of upper pressure drop limit and increases linearly over a prolonged use.
authors.affiliation: Institute of Chemical Engineering and Technology, University of the Punjab, Quaid-i-Azam Campus, 54590- Lahore, Pakistan ; Graz University of Technology, Graz, Austria.
authors.forename: Mahmood
authors.initials: M
authors.lastname: Saleem
authors.affiliation: Graz University of Technology, Graz, Austria.
authors.forename: Gernot
authors.initials: G
authors.lastname: Krammer
authors.affiliation: Institute of Chemical Engineering and Technology, University of the Punjab, Quaid-i-Azam Campus, 54590- Lahore, Pakistan.
authors.forename: Rafi Ullah
authors.initials: RU
authors.lastname: Khan
authors.affiliation: Graz University of Technology, Graz, Austria.
authors.forename: M Suleman
authors.initials: MS
authors.lastname: Tahir
keywords: Cake properties; Needle felt; Off-gas purification; Operating parameters; Pulse-jet bag filter