US4788918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solids incineration process and system
Assignee: KGI Inc
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Filing: 1987-11-20
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Granted: 1988-12-06
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Expires: 2007-11-20
Abstract
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.
Inventors
- 👤 Michael R. Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:45
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/006; F23G; F23G5/00; F23G5/006; F23G5/08; F23G5/14; F23G5/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
170 words
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.
Claim 2
Dependent Claim
170 words
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.
Claim 3
Dependent Claim
93 words
The system of claim 1 wherein said solids combustor means are comprised of a primary solids combustor having a solids inlet, a combustion gases outlet and an ash outlet; an ash quench chamber connected to receive ash from the ash outlet of said primary combustor having a quench liquid inlet and a wet ash outlet; a secondary combustion chamber having a combustion gases inlet and a combustion gases outlet; and fourth conduit means connected between the combustion gases outlet of said primary combustor and the combustion gases inlet of said secondary combustion chamber.
Claim 4
Dependent Claim
26 words
The system of claim 2 wherein said heat removal means is comprised of a heat exchanger for transferring heat from combustion gases to another process stream.
Claim 5
Dependent Claim
22 words
The system of claim 3 wherein said heat exchanger is a steam generator and said other process stream is boiler feed water.
Claim 6
Dependent Claim
143 words
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).
Claim 7
Dependent Claim
143 words
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).
Claim 8
Dependent Claim
39 words
The process of claim 5 which is further characterized to include the steps of: venting said purified gases withdrawn in accordance with step (f) to the atmosphere; and disposing of said neutralized mixture withdrawn in accordance with step (h).
Claim 9
Dependent Claim
43 words
The process of claim 5 which is further characterized to include the step of combining an aqueous acid solution with said acidic aqueous solution containing solid impurities as required to achieve neutralization in accordance with step (g) prior to carrying out step (g).
Claim 10
Dependent Claim
27 words
The process of claim 5 wherein the removal of heat from said combustion gases in accordance with step (c) is carried out by quenching said combustion gases.
Claim 11
Dependent Claim
34 words
The process of claim 5 wherein the removal of heat from said combustion gases in accordance with step (c) is carried out by indirectly transferring heat from said combustion gases to another process stream.
Claim 12
Dependent Claim
14 words
The process of claim 9 wherein said other process stream is boiler feed water.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |