Method and apparatus for preparing an additive for introduction to a gas scrubber

Abstract

Abstract A METHOD AND APPARATUS FOR PREPARING AN ADDITIVE FOR USE IN REACTING WITH SULFUR BEARING FLUE GASES IN A WET SCRUBBER. THE ADDITIVE IN THE SOLID STATE IS ENTRAINED IN A GAS STREAM, IS TRANSPORTED TO A SLURRY MAKE-UP AREA, IS CONTACTED WITH WATER TO WET AND DISENTRAIN THE ADDITIVE TO FORM A SLURRY AND SUBSEQUENTLY IS CONVEYED IN SLURRY FORM TO THE WET SCRUBBER WHERE IT REACTS WITH SULFUR OXIDES IN THE FLUE GAS ADMITTED TO THE SCRUBBER. THE ADDITIVE TRANSPORTING GAS, AFTER MOST OF THE ADDITIVE HAS BEEN REMOVED IN THE SLURRY MAKE-UP AREA, IS CONDUCTED TO THE FLUE GAS ADMITTING PORTION OF THE SCRUBBER. IN THE PREFERRED EMBODIMENT OF THE INVENTION, THE ADDITIVE TRANSPORTING GAS IS PROVIDED BY TAPPING OFF A PORTION OF THE UNSCRUBBED FLUE GAS PRIOR TO ITS ADMISSION INTO THE WET SCRUBBER. A COARSE, UNCALCINED ADDITIVE IS PULVERIZED IN A PULVERIZING MILL AND THE FLUE GAS STREAM IS PASSED THROUGH THE MILL TO DRY AND ENTRAIN THE ADDITIVE.

Inventors

• 👤 Earl K Rickard

Bibliographic Details