FILTER MIT ROTIERENDEM REINIGUNGS-SPRITZDUESENROHR

摘要

A filter comprises a housing 11 with inlet 15A and outlet 15B at opposite ends, enclosing a fixed pervious screen 25, both housing and screen being bodies of revolution about axis A. The housing tapers towards outlet 15B, where the annular space between the housing and screen opens into a solids-collecting zone 28. Inside the screen is a rotary assembly comprising two nozzle tubes directing a proportion of filtered liquid, recycled by external pump 45 from the space inside the screen, towards the screen so as to flush solids retained on its exterior progressively along the screen to zone 28. A fraction of the liquid from pump 45 is injected through three tangential nozzles into zone 28 to create a rotary flow and flush the solids towards tangential outlet 30. The assembly of nozzle tubes is rotated by the main flow of filtered liquid acting on inclined vanes 50. <IMAGE>