Process for removing dust from a dust-laden gas using a gas-permeable filter element arranged in a container

Claim 1

In a method of removing dust from a dust-laden gas using gas-permeable filter elements that are disposed in at least one tank, with said gas flowing through said filter elements from the outside to the inside thereof and depositing said dust on the outer surfaces of said filter elements, and with said deposited dust being removed from said filter elements by pressurized gas cleaning pulses that are applied to the interior of said filter elements, whereby the pressure differential that occurs across the filter elements is measured and, for said tank, in addition to said pressure differential across said filter elements, the flow rate of the dust-laden gas is determined, and the cleaning pulse is released when the ratio of the pressure differential to the flow rate, which ratio increases with time during the formation of a dust layer on said filter elements, reaches at least one limiting value, the improvement wherein: a plurality of tanks are supplied in parallel with partial streams of said dust-laden gas; the ratios of the pressure differentials across said filter elements, to the flow rates, of the individual partial streams, which ratios increase with time during the formation of dust layers on said filter elements, are determined; and when the determined ratio of one of said tanks reaches an experimentally determined limiting value, this tank and all of the other tanks are simultaneously cleaned by pressurized gas cleaning pulses that are supplied to the interior of the individual filter elements.