High turn-down ratio design for sulfur plants
Abstract
Abstract TO AVOID ABNORMALLY LOW TEMPERATURES AND FLOW RATES IN A SULFUR PLANT WHERE HIGH TURN-DOWN RATIOS ARE ENCOUNTERED IN THE RECOVERY OF FREE SULFUR FROM HYDROGEN SULFIDECONTAINING GASES, THE ACID GAS STREAM IS BURNED IN A SEPARATE FIRING TUNNEL WITH ENOUGH AIR TO CONVERT ONETHIRD OF THE HYDROGEN SULFIDE INTO SULFUR DIOXIDE. TO SUPPLEMENT THE HEAT REQUIREMENTS AND NECESSARY GAS VOLUMES, A HYDROCARBON FUEL IN AMOUNTS UP TO ABOUT 20 PERCENT OF THE DESIGN ACID GAS FEED RATE IS BURNED IN A SECOND FIRING TUNNEL. THE PRODUCTS OF COMBUSTION FROM THESE SEPARATE BURNING STEPS ARE COMBINED AND DISCHARGED INTO A BOILER WHERE A PORTION OF THE SULFUR PRODUCED IN THE OVERALL PROCESS IS REMOVED AFTER WHICH THE RESULTING SULFUR DENUDED STREAM IS PROCESSED IN CONVENTIONAL FASHION.
Inventors
- 👤 John W Palm
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |