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United States Patent | 7,067,101 |
Rameshni | June 27, 2006 |
The thermal combustion step of the modified Claus process is carried out in a water-wall boiler instead of a refractory-lined reaction furnace. The water-wall boiler replaces the conventional refractory-lined furnace and waste heat boiler when air, oxygen, or oxygen-enriched air is used as the oxidant. The acid gas combustion may be hydrogen sulfide-rich or hydrogen sulfide-lean with or without contaminants such as hydrocarbons and ammonia. Thermal combustion is performed in a single stage, without a recycle, for all levels of oxygen enrichment.
Inventors: | Rameshni; Mahin (Monrovia, CA) |
Assignee: |
WorleyParsons Group Inc.
(Arcadia,
CA)
|
Appl. No.: | 10/868,630 |
Filed: | June 15, 2004 |
Application Number | Filing Date | Patent Number | Issue Date | ||
60482908 | Jun., 2003 | ||||
Current U.S. Class: | 423/574.1 ; 423/220; 423/237; 423/576.8 |
Current International Class: | C01B 17/02 (20060101); B01D 53/52 (20060101) |
Field of Search: | 423/574.1,574.2,575,576.8,237,238,220,573.1 |
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Mahin Rameshni, "Equipment evaluation for oxygen enrichment revamps", Sulphur, No. 284, Jan.-Feb. 2003, pp. 43-47. cited by examiner . Mahin Rameshni, "Economics of oxygen enrichment", Sulphur, No. 285, Mar.-Apr. 2003, pp. 39-42, 44-47. cited by examiner . Section 5.2.3, "Boilers with integral combustion," p. 30 only of document entitled "Rice Husk Market Study," published 2003 (downloaded by examiner from http://www.dti.gov.uk/renewables/publications/pdfs/exp129.pdf on Mar. 7, 2006). cited by examiner . Belin, F. T., et al., "A Boiler For Hydrogen Sulphide Combustion." Koks i Khimiya (Coke and Chemistry), vol. 6, pp. 52-55, 1971. cited by examiner. |