Patent ID: 6551368
Filing Date: 2003-04-22
Classification: B01D

Abstract:
A dust filter comprising:a vertically oriented filter housing (1); a partition (2) dividing the filter housing (1) into a lower dust-contaminated air chamber (3) and an upper clean air chamber (4), wherein the partition (2) has a plurality of openings; self-supporting filter tubes (5) suspended from the openings and extending into the lower dust-contaminated chamber (3), wherein the self-supporting filter tubes (5) are open upwardly in a direction toward the clean air chamber (4); wherein several self-supporting filter tubes (5) are combined to a filter bundle (7), respectively, wherein a spacing between the self-supporting filter tubes (5) of each one of the filter bundles (7) is smaller than a spacing of the filter bundles (7) relative to one another; and means (10, 16) for cleaning off dust and product particles adhering to outer surfaces of the self-supporting filter tubes (5); wherein the means for cleaning comprises a compressed air pulse injector having compressed air sources (10) arranged in the clean air chamber (4) above the filter bundles (7), respectively, and configured to remove by compressed air pulses the dust and product particles adhering to the outer surfaces of the filter tubes (5); and catch nozzles (13) arranged at a top side of the partition and surrounding the self-supporting filter tubes (5) of the filter bundles (7), respectively, wherein the catch nozzles (13) are configured to concentrate the compressed air of the compressed air pulse injector system onto the self-supporting filter tubes (5) of the filter bundles (7).