Patent ID: 6938780

Claim:
A centrifugal separator for separating particles from gas, comprising a separator chamber that comprises an upper portion delimited horizontally by walls and a lower portion having a downwardly decreasing horizontal cross section, the separator having means for defining therein a vertical gas vortex that comprise an inlet for gas to be dedusted formed in the upper portion of the chamber, an outlet for dedusted gas formed in said upper portion, and an outlet for separated particles formed in the lower portion of the chamber, said walls of the upper portion comprising at least first, a second and a third substantially vertical planar walls, located one next to the other in the direction of flow of said gas vortex and defining three substantially vertical planar inner faces of said upper portion, said inlet for gas to be dedusted being formed in the vicinity of a first corner defined between said first and second walls, the inner faces of the first and second walls being substantially perpendicular and the inner faces of the second and third wall being substantially perpendicular, the separator comprising an acceleration duct for accelerating a mixture of gas and particles circulating in said duct, from a first end to a second end thereof, before said mixture enters said separator chamber, a first transverse section of said acceleration duct at said first end thereof being distinctly greater than a second transverse section of said acceleration duct at said second end thereof, the second end of the acceleration duct being connected to said inlet for gas to be dedusted at the first corner, while forming an obtuse angle with said second wall, and said second end of the acceleration duct being inclined downwardly in a direction towards the separator chamber.