High temperature burning of particulate carbonaceous solids

Claim 1

A PROCESS FOR BURNING SOLIDS CONTAINING OVER 1.0 WT. PERCENT CARBON AND HAVING A PARTICLE SIZE UNDER 1000 MICRONS WHICH COMPRISES MAINTAINING A DENSE TURBULENT FLUIDIZED BED OF SAID SOLIDS AT A TERPERATURE ABOVE 1300* F. IN A BURNING ZONE PASSING IN LESS THAN THREE SECONDS AN UPWARDLY FLOWING STREAM OF SOLIDS FORM SAID BED THROUGH A NARROWLY CONFINED ELONGATED VERTICAL PASSAGEWAY AT A VELOCITY IN THE RANGE OF 10 TO 60 FT./SEC. AND AT A DENSITY LESS THAN 20% OF THE DENSITY OF SAID BED, SAID PASSAGEWAY EXTENDING FROM WITHIN SAID BED INTO A DISPERSE SOLIDS PHASE THEREABOVE INJECTING 0.25 TO 2 STANDARD CUBIC FEET OF A FREE OXYGEN-CONTAINING GAS PER POUND OF SOLIDS CIRCULATED THROUGH SAID PASSAGEWAY ALONG WITH SOLIDS FROM SAID BED UPWARDLY INTO THE LOWER PORTION OF SAID PASSAGEWAY, DEFLECTING SOLIDS ISSUING FROM THE UPPER PORTION OF SAID PASSAGEWAY DOWN TOWARDS SAID BED, AND REMOVING FROM THE UPPER PORTION OF SAID BURNING ZONE GASEOUS PRODUCTS OF COMBUSTION HAVING A CO2/CO RATIO ABOVE 5 AND LESS THAN 5 VOL. PERCENT O2.