Removal of sulfur dioxide from boiler flue gases
Abstract
Abstract A process for the removal of sulfur dioxide from boiler flue gases produced by the combustion of a sulfur-containing fuel, such as a sulfur-containing coal, wherein the sulfur-dioxidecontaining boiler flue gases after cooling and removal of solid ash constituents are subjected to catalytic oxidation to convert the sulfur dioxide to sulfur trioxide. In carrying out the catalytic oxidation operation the relatively cool sulfur-dioxidecontaining flue gases are brought up to an elevated temperature upwards of 750* F. at which the catalytic oxidation operation is carried out, by passing the sulfur-dioxide-containing flue gases in indirect countercurrent heat-exchange relationship with the sulfur trioxide-containing gases issuing from the catalytic oxidation operation. The sulfur-dioxide-containing flue gases are then further heated, such as by admixing therewith a hightemperature flue gas, just prior to subjecting the thus-heated sulfur-dioxide-containing flue gases to catalytic oxidation.
Inventors
- 👤 Joseph W Henry
- 👤 Edward S Loane
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
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