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US 4,788,918 AGranted
Solids incineration process and system
AssigneeJohn Zink Company
InventorMichael R. Keller
Life of this patent
Estimating the term…
Abstract
An improved solids incineration process and system are provided of the type wherein the solids are combusted and the resulting combustion gases are separated from combustion ash, the ash is quenched and neutralized with a quench liquid, heat is removed from the combustion gases and the combustion gases contacted with a scrubber liquid in a wet scrubber to remove fly ash therefrom. By the present invention, the spent scrubber liquid from the wet scrubber is utilized as at least a portion of the ash quench liquid.
Claims10
A solids incineration system comprised of:
- solids combustor means having a solids inlet, a combustion gases outlet and an ash outlet;
- ash quench means connected to receive ash from the ash outlet of said combustor means having a quench liquid inlet and a wet ash outlet;
- heat removal means for removing heat from combustion gases having an inlet and an outlet;
- first conduit means connected between the combustion gases outlet of said combustor and the inlet of said heat removal means;
- wet scrubber means for removing fly ash from combustion gases having a combustion gases inlet, a clean combustion gases outlet, a srubber liquid inlet and a spent scrubber liquid outlet;
- second conduit means connected between the outlet of said heat removal means and the combustion gases inlet of said wet scrubber means;
- third conduit means connected between the spent scrubber liquid outlet of said wet scrubber means and the quench liquid inlet of said ash quench means;
- and
- spent scrubber liquid pump means disposed in said third conduit means.
6 more elements
A solids incineration process comprising the steps of:
- (a) combusting the solids whereby combustion gases and ash are produced therefrom;
- (b) separating said ash from said combustion gases;
- (c) removing heat from said combustion gases;
- (d) contacting said combustion gases with a basic aqueous solution to remove solid impurities and water soluble gases therefrom and thereby produce purified combustion gases and an acidic aqueous solution containing removed solid impurities;
- (e) separating said acidic aqueous solution containing solid impurities from said purified combustion gases;
- (f) withdrawing said purified combustion gases;
- (g) mixing the ash separated in accordance with step (b) with the acidic aqueous solution containing solid impurities separated in accordance with step (e) to quench said ash and to at least partially neutralize both said ash and said acidic aqueous solution;
- and
- (h) withdrawing the neutralized mixture produced in accordance with step (g).
6 more elements
Dependencies are inferred from the claim text.