Patent ID: 8157249

Claim:
An air disperser for a spray dryer, comprising: an air inlet, a cylindrical pipe having a pipe wall defining an air outlet area equipped with one or more atomizing means, said pipe having a longitudinal axis defining an axial direction and a radial direction extending substantially perpendicularly to said axial direction, a cylindrical outer wall provided around the cylindrical pipe and defining a space between the pipe wall and the outer wall of the air disperser, a plurality of guide vanes, provided in said space, wherein the guide vanes are positioned substantially vertically in the axial direction and substantially on the radii between the pipe wall and the outer wall of the air disperser, and wherein at least one of said guide vanes covers at least 90% of the full radius from the pipe wall in the direction towards the outer wall of the air disperser, and the rest of said guide vanes are distributed on radii along the circumference of the pipe, said guide vanes being of various sizes.