Rotary bottom ash regeneration system

A method of processing bottom ash from a circulating fluidized bed furnace having reactant particles, each reactant particle having a partially reacted outer capsule and an unreacted internal core, comprising the steps of:

• a) providing said bottom ash into a rotating cylindrical body having a plurality of nozzles for spraying a regeneration fluid along a length of the cylindrical body;
• b) sensing physical conditions inside of the cylindrical body;
• c) receiving an indication of the mass of the unreacted internal core within the cylindrical body;
• d) calculating from the sensed physical conditions and the mass of the unreacted internal core an amount of regeneration fluid to be sprayed to cause the reactant particles to have a regeneration fluid concentration within a ‘required content’ range, wherein the required content range is 5-25% of the stoichiometric amount of regeneration fluid required to totally react all of the unreacted internal cores;
• and
• e) spraying the calculated amount of regeneration fluid onto the bottom ash from the plurality of nozzles within the cylindrical body causing the reacted outer capsules of the reactant particles to open, exposing the unreacted internal core, thereby reactivating the reactant particles.