Rotor of gas dispersion arrangement
A rotor of a gas dispersion arrangement, including a cover disc, air slots arranged to protrude away from the cover disc, the air slots defining an interior space in the interior of the rotor, an air channel connected to the air slot for supplying air to be dispensed in slurry, and slurry slots arranged between and an alternating way with the air slots around the interior space. The slurry slots are in fluid communication with the interior space, and radially extending blades are arranged for separating the air slot from adjacent slurry slots. The cover disc includes at least one through-hole extending from an upper surface of the cover disc to at least one of the slurry slots.
1 . A rotor of a gas dispersion arrangement, comprising:
a cover disc,
air slots arranged to protrude away from the cover disc, the air slots defining an interior space in an interior of the rotor,
an air channel connected to the air slots for supplying air to be dispensed in slurry,
slurry slots arranged between and alternating with the air slots around the interior space,
the slurry slots being in fluid communication with the interior space,
radially extending blades arranged for separating the air slots from adjacent slurry slots, wherein
the cover disc comprises at least one through-hole extending from an upper surface of the cover disc to at least one of the slurry slots, and
a total area of the at least one through-hole in relation to an area of the cover disc is in range of 2%-40%.
2 . The rotor as claimed in claim 1 , wherein
the at least one through-hole has a shape of a polygon.
3 . The rotor as claimed in claim 2 , wherein
the at least one through-hole comprises at least one side edge on the upper surface that makes a hole angle with a radial direction of the rotor, wherein said hole angle is in range of −10°-+45°.
4 . The rotor as claimed in claim 1 , wherein
the at least one through-hole has a round shape.
5 . The rotor as claimed in claim 1 , wherein
an outmost wall of the at least one through-hole makes an outer diameter angle with a direction of a center axis, wherein said outer diameter angle is in range of −10°-+60°.
6 . The rotor as claimed in in claim 1 , wherein
an innermost wall of the at least one through-hole makes an inner diameter angle with a direction of a center axis, wherein said inner diameter angle is in range of −10°-+60°.
7 . The rotor as claimed in claim 1 , wherein
at least one side wall of the at least one through-hole makes a side wall angle with a direction of a center axis, wherein said side wall angle is in range of −20°-+60°.
8 . The rotor as claimed in claim 1 , wherein
an area of the at least one through-hole in relation to a cross-sectional area of the corresponding slurry slot is in range of 2%-40%.
9 . The rotor as claimed in claim 1 , wherein
the upper surface of the cover disc is provided with an outer ring that has a height extending away from said upper surface.
10 . The rotor as claimed in claim 1 , wherein
a bottom surface of the air channel is inclined in relation to a plane of the cover disc in an inclination angle selected in range of 0°-60°.
11 . The rotor as claimed in claim 1 , wherein
a length of the air channel in relation to a diameter of the cover disc is selected in range of 10%-30%.
12 . The rotor as claimed in claim 1 , wherein
the at least one air slot has a curved shape without any points of discontinuity.
13 . The rotor as claimed in claim 1 , wherein
the air channel is connected to a center air void for supplying air to said air channel, wherein the center air void is designed and dimensioned such that a cross sectional area of all the air channels is at least substantially equal with a cross sectional area of an inlet receiving air in the rotor.
14 . The rotor as claimed in claim 1 , wherein
a cross-sectional shape of the slurry slot is either triangular or rectangular.
15 . A rotor of a gas dispersion arrangement, comprising:
a cover disc,
air slots arranged to protrude away from the cover disc, the air slots defining an interior space in an interior of the rotor,
an air channel connected to the air slots for supplying air to be dispensed in slurry,
slurry slots arranged between and alternating with the air slots around the interior space,
the slurry slots being in fluid communication with the interior space,
radially extending blades arranged for separating the air slots from adjacent slurry slots, wherein
the cover disc comprises at least one through-hole extending from an upper surface of the cover disc to at least one of the slurry slots, and
the upper surface of the cover disc comprises at least one top blade, arranged radially relative to the cover disc.
16 . The rotor as claimed in claim 15 , wherein
a length of the at least one top blade is selected in range from 0.5× a length of the corresponding at least one through-hole in a radial direction on the upper surface of the cover disc to a length equal to the radius of the upper surface.
17 . The rotor as claimed in claim 15 , wherein
a height of the at least one top blade in relation to a height of the rotor measured from a bottom thereof to the underside of the cover disc is selected in range of 1%-50%.