Atomizer wheel with improved nozzle for rotary atomizers

Details Atomizer wheel with improved nozzle for rotary atomizers Atomizer wheel with improved nozzle for rotary atomizers

B - Operations, Transporting

05

B

B05B 3/02 (2006.01) B05B 3/10 (2006.01) B24C 3/22 (2006.01)

Patent

CA 2302985

The present invention pertains to an improved nozzle for use in wear-resistant rotary atomizers and to atomizer wheels containing said improved nozzles. Said atomizer wheels and nozzles have the same wear resistance as the ones described in the prior art or even better, but at the same time, the nozzles have been improved to provide microspherical particles with a very narrow particle size distribution. The nozzle of the present invention comprises wear-resistant sintered material and has a flow channel in the shape of a vertical slot. Said vertical slot may optionally be uniformly rounded. It was found that when these improved nozzles are used for spray-drying suspensions, microspherical particles with a narrower particle size distribution are obtained than when using nozzles with cylindrical flow channels.

Buse de pulvérisateur améliorée utilisée dans des atomiseurs rotatifs résistant à l'usure et roues de pulvérisateur contenant les buses en question. Les roues et les buses de pulvérisation ont une résistance à l'usure égale ou même supérieure à celles mentionnées dans les procédés précédents, mais les buses ont été améliorées pour produire des particules microsphériques ayant une distribution granulométrique très étroite. La buse comprend un matériau fritté résistant à l'usure et un couloir d'écoulement constitué d'une rainure verticale pouvant être uniformément arrondie. On a constaté que l'utilisation de ces buses améliorées pour les suspensions à séchage par atomisation permet d'obtenir des particules microsphériques dont la distribution granulométrique est plus étroite que celle obtenue avec les couloirs d'écoulement cylindriques.

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