Dynamic ring classifier for a coal pulverizer
AssigneeRiley Power, Inc.
InventorsQingsheng Lin, Craig A. Penterson, Daniel P. Smith, Richard N. Du Verger
Life of this patent
Estimating the term…
Abstract
The present invention is directed to, among other things, a classifier assembly for mounting on the center shaft of a rotary coal pulverizer which includes a labyrinthian sealing arrangement operatively associated with the shaft for limiting the egress of unacceptably large coal particles from the pulverizer.
Claims16
A classifier assembly for mounting on a center shaft defining an axis of rotation and configured for rotational motion within a process chamber of a material size reducing system, the classifier assembly comprising:
- (a) an elongate arm configured for mounting on the center shaft in such a manner as to extend radially outward from the center shaft, the arm including a protective guard;
- and
- (b) a labyrinthian sealing arrangement operatively associated with a radially outer portion of the arm and configured for limiting the egress of particles from the process chamber based on particle size during rotational motion of the center shaft.
A system for limiting particle egress in a material size reduction device having a chamber with a center shaft mounted for rotational motion therein, the system comprising:
- (a) an elongate arm configured for mounting on the center shaft in such a manner as to extend radially outward from the center shaft;
- and
- (b) a labyrinthian sealing arrangement operatively associated with a radially outer portion of the arm and configured for limiting the egress of particles from the chamber based on particle size during rotational motion of the center shaft, the sealing arrangement including a beater for reducing the size of particulate passing therethrough.
A coal pulverizer having a grinding chamber and a center shaft defining an axis of rotation and configured for rotational motion within the grinding chamber, the coal pulverizer including a classifier assembly comprising:
- (a) an elongate arm mounted on the center shaft in such a manner as to extend radially outward from the center shaft;
- and
- (b) a labyrinthian sealing arrangement operatively associated with a radially outer portion of the elongate arm and configured for limiting the egress of coal particles from the grinding chamber based on particle size during rotational motion of the center shaft, wherein the labyrinthian sealing arrangement comprises:
- (i) an annular rotator including an axially projecting, radially inner ring and a plurality of axially projecting members disposed along a radially outer circumference of the rotator;
- and
- (ii) an annular stator including an axially projecting portion, the axially projecting portion defining a radially inner surface and opposing radially outer surface, the stator being configured and dimensioned for mounting in the process chamber in such a manner as to be positioned axially adjacent to the rotator with the radially inner surface of the axially projecting portion in a radially adjacent relationship with respect to the radially inner ring of the rotator and the radially outer surface of the axially projecting portion in a radially adjacent relationship with respect to the plurality of axially projecting members along a radially outer circumference of the rotator.
Dependencies are inferred from the claim text.