VERFAHREN UND VORRICHTUNG ZUR REINIGUNG VON FILTERN, DIE MIT POLYMEREN UND SCHMELZBAREN HARZEN VERUNREINIGT SIND, IN SITU, OHNE DIE FILTERELEMENTE ZU ENTNEHMEN

A method and an apparatus for cleaning filters (3, 3a, 3b) contaminated by hot-melting resins and polymers in situ, without removing the filtering elements. The method comprises a preliminary step, during which the circulation of the product to be filtered through the filter to be cleaned is interrupted, and a draining step, during which a pressurized draining fluid is passed through the filter (3, 3a, 3b) in order to empty the filter of the residual product. A filter cleaning step is then performed during which a cleaning fluid, constituted at least partially by superheated steam, is passed through the filter. The fluids used to clean the filter are then subjected to treatments to eliminate pollutants.