SYSTEM AND METHOD FOR DECOMPOSING AMMONIA FROM FLY ASH

摘要

A system and method for decomposing ammonia from fly ash contaminated with ammonia is provided which includes maintaining the temperature of a bed of ammonia- contaminated fly ash at a decomposition temperature greater than 500°F and less than 842°F to decompose the ammonia from the fly ash. In a preferred embodiment, the ammonia- laden fly ash is maintained at a temperature less than a lowest carbon combustion temperature at which substantial combustion of carbon in fly ash begins to occur. A preferred embodiment includes a first chamber operating at a decomposition temperature greater than 5000F and less than 842°F followed by a second chamber operating at a higher carbon combustion temperature for carbon burn-out.