Fluidized bed process

Claim 1

The process of aggregating particles in a fluidized bed dryer comprising the steps of: A. BLOWING AIR HEATED IN AN EXTERNAL BURNER UPWARD IN THE DRYER; B. INTRODUCING A 50 PERCENT BY WEIGHT AQUEOUS SOLUTION OF AMMONIUM SULPHATE AS FEED TO FORM PARTICLES FLUIDIZED INTO AN UPPER BED OF SMALLER PARTICLES FLUIDIZED IN HEATED AIR FLOWING AT A REDUCED VELOCITY, THE SMALLER PARTICLES AGGREGATING TO GROW AND FALL FROM THE UPPER BED AND FORM A LOWER FLUIDIZED BED OF LARGER PARTICLES IN HEATED AIR FLOWING AT A HIGHER VELOCITY; C. INTRODUCING A 50 PERCENT BY WEIGHT AQUEOUS SOLUTION OF AMMONIUM SULPHATE AS FEED INTO THE LOWER FLUIDIZED BED TO FURTHER AGGREGATE THE PARTICLES THEREIN TO FALL FROM THE LOWER FLUIDIZED BED AS PRODUCT GRANULES; D. COLLECTING AND REMOVING THE PRODUCT GRANULES OF AMMONIUM SULPHATE FROM THE DRYER; AND E. FURTHER HEATING AIR BETWEEN THE FLUIDIZED BEDS BY THE CONTROLLED BURNING OF FUEL THEREIN TO INCREASE AND CONTROL THE VELOCITY OF AIR IN THE UPPER FLUIDIZED BED WHILE INCREASING THE DRYING EFFECT IN THE UPPER FLUIDIZED BED.