Operation Parameters of Vacuum Cleaned Filters

Authors: Wilhelm Hoeflinger, Thomas Laminger, Johannes Wolfslehner

Abstract:

For vacuum cleaned dust filters there exist no calculation methods to determine design parameters (e.g. traverse velocity of the nozzle, filter area…). In this work a method to calculate the optimum traverse velocity of the nozzle of an industrial-size flat dust filter at a given mean pressure drop and filter face velocity was elaborated. Well-known equations for the design of a cleanable multi-chamber bag-house-filter were modified in order to take into account a continuously regeneration of a dust filter by a nozzle. Thereby, the specific filter medium resistance and the specific cake resistance values are needed which can be derived from filter tests under constant operation conditions.

A lab-scale filter test rig was used to derive the specific filter media resistance value and the specific cake resistance value for vacuum cleaned filter operation. Three different filter media were tested and the determined parameters were compared to each other.

Keywords: Design of dust filter, Dust removing, Filter regeneration, Operation parameters.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1091012

References:

[1] Pneumafil LLC, "Automatic Panel Filter (Product Data Sheet),” www.pneumafil.com (2013)
[2] Luwa Ldt, "APF - Automatic Panel Filter (Product Data Sheet),” www.luwa.co.uk (2013)
[3] OSPREY Corporation, "Air/Fiber Separator (Product Data Sheet),” www.ospreyfilters.com (2013)
[4] K. Hjemsted, T. Schneider, "Documentation of Dustiness Drum Test,” Department of Occupational Hygiene, National Institute of Occupation Health, Copenhagen, Denmark, 1996
[5] M. Reiman, J. Uitti, "Exposure to Microbes, Endotoxins and Total Dust in Cigarette and Cigar Manufacturing: an Evaluation of Health Hazards,” Ann. occup. Hyg., Vol. 44, No. 6, pp. 467-473, 2000
[6] H. S. Barr: „Modern Plant Dust Control Techniques"; Chest. 1981; 79 (4): S. 95-97
[7] DIN EN 14034-1:2011, Determination of Explosion Characteristics of Dust Cloud. Beuth Verlag, Berlin
[8] F. Hauert, A. Vogl. S. Radandt, "Measurement of Dust Cloud Characteristics in Industrial Plants (Final Technical Report),” Forschungsgesellschaft für angewandte Systemsicherheit und Arbeitsmedizin, Mannheim, 1995
[9] F. Löffler, Staubabscheiden. Georg Thieme Verlag, Stuttgart, Germany, 1988; 354 p.
[10] M. Saleem, G. Krammer, M.S. Tahir, "The Effect of Operating Conditions on Resistance Parameters of Filter Media and Limestone Dust Cake for Uniformly Loaded Needle Felts in a Pilot Scale Test Facility at Ambient Conditions,” Powder Technology 228 (2012) p. 100–107
[11] J. Wolfslehner, T. Laminger, W. Höflinger, "Drum Filter with Cleanable Filter Media for Separation of Dust Especially of Fibrous Dusts”; in 2013 Proc. PARTEC, Nuremberg, Germany
[12] J. Wolfslehner, T. Laminger, W. Höflinger, "Drum Filter with Cleanable Filter Media for the Separation of Fibrous Dust Including Nano Particles,” in 2013 Proc. FILTECH, Wiesbaden, Germany
[13] ISO 11057:2012-05, Air Quality - Test Method for Filtration Characterization of Cleanable Filter Media. Beuth Verlag, Berlin