Patent ID: 7300481

Claim:
A method for dedusting filters for dust-laden waste gases, the filters comprising a plurality of vertically arranged filter elements each having an upper, open end and a lower, closed end, wherein the dust-laden waste gases flow through the filter elements and cleaned waste gases are discharged through the open ends to a clean-gas discharge duct; the method comprising: blowing compressed-air blasts at a reservoir or receiver pressure of 0.5 to 3 bar into the open ends of the filter elements, wherein the consumption of the compressed air used for dedusting is 0.5 to 4 liters per m 2 of filter area, wherein at least one filter element is each arranged in a filter module and at least two filter modules are each arranged in a filter housing or filter chamber, wherein a selected filter module to be dedusted is set in a substantially flow-free state during dedusting by interrupting a clean-gas discharge duct of the selected filter module while simultaneously re-instating the connection of a previously dedusted filter module to the clean-gas discharge duct during a change-over of the filter module to be dedusted, enabling the minimization of pressure deviations in the filter.