Ultrafines coal pulverizer
OwnerDavid K. Browninventor
Life of this patent
Estimating the term…
Abstract
This invention relates to means for pulverizing coal or other minerals by causing them to impact against rotating elements which are specially contoured to maximize two objectives: 1) improved efficiency in pulverization of the material particles at high production rates; and 2) protection of the rotating elements themselves from wear by contact with the process material. The device is formed with counter-rotating rotors which are inverted with respect to each other. The rotors have specially contoured elements attached to their inner faces in concentric rings. The elements could be any one of four different embodiments or a combination of two or more different elements forming successive rings.
Claims16
A counter-rotating rotor system for a coal/mineral pulverizer, comprising:
- a center feed pipe;
- an upper rotor having a bottom surface;
- a first rotation means for rotating said upper rotor connected to a pulverizer;
- a lower rotor having a top surface, said lower rotor facing said upper rotor and rotating in an opposite direction relative to said upper rotor;
- a second rotation means for rotating said lower rotor connected to said pulverizer;
- a first plurality of irregularly shaped elements which are contoured with a curvature defined by a continuous series of perpendiculars of dimensions approaching zero said perpendiculars relative to tangents from an inside wall of said feed pipe and for retention of a material barrier when said material is centrifugally accelerated;
- wherein said elements outwardly extend from said top surface of said lower rotor;
- and
- a second plurality of irregularly shaped elements which are contoured each increment of said contour being defined by a series of perpendiculars to the lines of impact of particles that exit an immediately preceding plurality of irregularly shaped members wherein the impact of said particles is maximized and further curved for retention of process material when said material is centrifugally accelerated wherein said elements outwardly extend from either said bottom surface of said upper rotor or said top surface of said lower rotor.
A counter-rotating rotor system for a coal/mineral pulverizer, comprising:
- an upper rotor having a bottom surface;
- a first rotation means for rotating said upper rotor connected to a pulverizer;
- a lower rotor having a top surface, said lower rotor facing said upper rotor and rotating in an opposite direction relative to said upper rotor;
- a second rotation means for rotating said lower rotor connected to said pulverizer;
- a first plurality of concentric rings mounted at one end to said top surface of said lower rotor and having an unmounted outer rim;
- a second plurality of concentric rings mounted at one end to said bottom surface of said upper rotor and having and unmounted outer rim;
- wherein said first and said second pluralities of concentric rings are radially alternating and positioned in a spaced apart relationship relative to each other such that material is retained against said rings in a conical pattern due to centrifugal acceleration.
Dependencies are inferred from the claim text.