Back to results
US 6,015,104 AGranted
Process and apparatus for preparing feedstock for a coal gasification plant
OwnerJohn W. Rich, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A process and apparatus for coal gasification plant feedstock preparation. A raw feedstock slurry is fed to a hydrocyclone which separates and provides a primary carbonaceous-rich overflow. The primary overflow is further separated by a dewatering screen into a secondary carbonaceous-rich overflow and a media bleed slurry. The secondary overflow is crushed by a crusher and a portion of the media bleed slurry is added to the crushed secondary overflow for subsequent milling and conditioning.
Claims3
A process for preparing feedstock for a coal gasification plant, comprising the steps of:
- admitting a raw feedstock slurry containing carbonaceous and inert particles to a hydrocyclone and therein separating a substantial fraction of the carbonaceous particles in the hydrocyclone to yield a primary carbonaceous-rich overflow;
- further separating said primary carbonaceous-rich overflow to produce a secondary carbonaceous-rich overflow and a media bleed slurry;
- crushing said secondary carbonaceous-rich overflow;
- adding at least a portion of said media bleed slurry to said crushed secondary carbonaceous-rich overflow;
- milling said crushed secondary carbonaceous-rich overflow and media bleed slurry portion;
- and
- conditioning said crushed and milled carbonaceous rich material to provide a finished feedstock slurry having a predetermined solids to liquid ratio suitable for feeding to a gasifier.
4 more elements
Dependencies are inferred from the claim text.