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US 10,744,534 B2Granted
Classifier and method for separating particles
AssigneeGeneral Electric Technology GmbH
InventorsPaul Colson, Douglas Crafts
Life of this patent
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Abstract
A classifier for separating particles is provided. The classifier includes a rotor having a direction of rotation defined by a rotational axis of the rotor, and a plurality of blades disposed on the rotor around the rotational axis. At least one blade of the plurality has a swept orientation in the direction of rotation. The at least one blade is arranged to contact and direct the particles away from the classifier and thereby restrict the particles from concentrating in areas adjacent to the classifier.
Claims17
A classifier for separating particles comprising:
- a rotor having a direction of rotation defined by a rotational axis of the rotor;
- a plurality of blades disposed on the rotor around the rotational axis;
- and
- wherein at least one blade of the plurality has a swept orientation in the direction of rotation, the at least one blade arranged to contact and direct a first plurality of the particles each having a larger size than a desired fineness grade away from the classifier and thereby restrict the first plurality of particles from concentrating in areas adjacent to the classifier while allowing a second plurality of the particles each having a size equal to or smaller than the desired fineness grade to pass between two blades of the plurality of blades;
- and
- wherein the at least one blade has a leading surface with at least one of a curved and angled shape having an apex that faces the direction of rotation of the rotor.
3 more elements
A method for separating particles comprising:
- forcing the particles against an upstream side of a classifier that includes a rotor and a plurality of blades disposed on the rotor around a rotational axis of the rotor that defines a direction of rotation of the rotor;
- rotating the rotor in the direction of rotation such that a first stream of the particles flows between the plurality of blades from the upstream side to a downstream side of the classifier, and such that a second stream of the particles is restricted from flowing between the plurality of blades from the upstream side to the downstream side;
- and
- restricting particles of the second stream from concentrating in areas adjacent to the classifier via contacting the particles of the second stream with at least one blade of the plurality that has a swept orientation in the direction of rotation that directs the particles of the second stream away from the classifier;
- wherein the particles of the first stream are each of a size equal to or smaller than a desired fineness grade and the particles of the second stream are each of a size larger than the desired fineness grade;
- and
- wherein the at least one blade has a leading surface with at least one of a curved and angled shape having an apex that faces the direction of rotation of the rotor.
4 more elements
A pulverizer mill comprising:
- a classifier that includes a rotor having a direction of rotation defined by a rotational axis of the rotor, the classifier further includes a plurality of blades disposed on the rotor around the rotational axis;
- and
- wherein at least one blade of the plurality has a swept orientation in the direction of rotation, the at least one blade arranged to contact and direct a first plurality of particles each having a size larger than a desired fineness grade away from the classifier and thereby restrict the first plurality of particles from concentrating in areas adjacent to the classifier while allowing a second plurality of particle each having a size equal to or smaller than the desired fineness grade to pass between two blades of the plurality of blades wherein the at least one blade has a leading surface with at least one of a curved and angled shape having an apex that faces the direction of rotation of the rotor, and the at least one blade exhibits a shaped outer profile that is substantially the same from a top edge to a bottom edge.
Dependencies are inferred from the claim text.