GB1411644A - Centrifuge for the continuous separation of solid material liquid mixtures - Google Patents

Abstract

1411644 Screw centrifuges KLOCKNERHUMBOLDT-DEUTZ AG 29 Dec 1972 [30 Dec 1971] 60210/72 Headings B1D and B2P In a screw centrifuge for the continuous separation of solids-liquid mixtures, the flights 6 of the screw 5 are secured to hollow carrying elements 7, at least one of which is in communication with a feed pipe 8 for washing liquid and is provided with apertures 9 for discharging washing liquid into the centrifuge drum 1. The solids-liquid mixture to be centrifuged is introduced through a stationary pipe 12 coaxial with the pipe 8 and passes into a distribution chamber 14 from which it is fed into the drum through apertures 13. The carrying elements 7 are in the form of pipes and are connected to the feed pipe 8 for rotation therewith. The apertures 9 open in the conical portion of the drum 1 so that the solids are washed by the washing liquid as they are being conveyed by the screw 5 towards discharge apertures 4 in the drum. The washing liquid may be introduced into the pipe 8 by gravity or under pressure. The apertures 9 are arranged directly behind the screw flights 6, as seen in the direction of conveyance of the screw, to facilitate removal of deposits from the flights. The centrifuge housing 2 is supported on rubber buffers 17, 18. In a modification, Fig 2 (not shown), the apertures in the walls of the carrying elements are constructed as nozzles directed outwardly towards the screw flights. The conical portion of the centrifuge drum has a perforated cylindrical extension in the direction of conveyance of the solids. For cleaning the centrifuge washing liquid may be introduced through both feed pipes after a centrifuging operation. The hollow carrying elements may be provided at both ends with removable closures to facilitate cleaning their interior walls.