Low pressure filter used for cleaning air contaminated with dust comprises a chamber for the contaminated air, a chamber for the purified air, and a rinsing tank

摘要

Low pressure filter (1,2) comprises a chamber (11) for the contaminated air; a chamber (22) for the purified air; and a rinsing tank (26). The chamber for contaminated air is connected by low pressure filter tubes (14,15) to the chamber for purified air via openings (21) and has a valve (31) for controlling a counter rinsing device. The valves are connected to the rinsing tank and a mouthpiece formed as a nozzle provided on the inner chamber of each filter tube is connected to the upper and lower surfaces of the rinsing tank. The upper surface of the rinsing tank has passages (39) for pressurized air. The passages are arranged concentrically around the nozzle and the whole inner periphery of all passages form an unbroken line. Preferred Features: The cross-sectional surface formed by the passages is larger than the maximum cross-section of each valve and thus larger than the outlet cross-section of each nozzle. Further openings (44) for nozzles are arranged in the upper surface of the rinsing tank to form an open surface.