Comparing the operating behavior of pulse cleaned filter bags with that of flat media in a VDI tester
O. Kurtz, G. Kasper, J. Meyer
FILTECH 2011 International Conference & Exhibition for Filtration and Separation Technology, Wiesbaden, 22.-24.3.2011, Proceedings, II-364
Laboratory-scale filter tests according to VDI 3926 (or comparable guidelines) have been used for many years to characterise pulse jet cleaned filter media and to predict their behaviour in bag house filters. A direct comparison of test results with data from actual filter bags in a bag house would therefore be of great interest. This paper first presents design and operating features of a bag filter unit for 3x3 filter hoses with attached VDI test unit, as well as instrumentation to measure filter performance including PM2.5 emissions. It then discusses a strategy for meaningful comparisons on the basis of comparable operating conditions for filtration and cleaning, supported by on-line measurements of pulse intensity and face velocity. Finally, it presents first results of comparison measurements.