Patent ID: 6749665
Filing Date: 2004-06-15
Classification: B01D

Abstract:
A method for cleaning a barrier filter, comprising a plurality of filter elements, of woven fabric or felt, arranged to separate particles out of a polluted gas, whereby the filter elements are cleaned by pressurised air pulses, the frequency, the maximum pressure, and the duration of which can be varied in order to minimise, by an adjustment, the total emission of dust and maximise the life of the filter elements, wherein the frequency and/or the maximum pressure and/or the duration of the cleaning pulses are varied for a separate filter element, for a group of filter elements or a plurality of groups of filter elements,wherein the maximum value for the instantaneous emission of dust, the emission peak, is determined after each cleaning pulse, and wherein the emission peak is used, after cleaning of a certain group of filter elements, for selecting the frequency and/or the maximum pressure and for the duration of the cleaning pulses for this group of filter elements during continued operation.