US3877879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for handling ammonia-containing acid gas streams
Assignee: BP America Production Co
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Filing: 1973-02-26
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Granted: 1975-04-15
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Expires: 1993-02-26
Abstract
Abstract Refinery or similar streams containing NH3 are processed in a sulfur plant having separate burners for the NH3-containing acid gas stream and for the NH3-free acid gas stream. A sampling device is provided for continuously or periodically sampling the combustion products from the unit burning the NH3-containing gas. The H2S/SO2 ratios at this sample point and in the sulfur plant tail gas are used to control the operation of the system. The present invention relates to the conversion of H2S to elemental sulfur. More particularly, it is concerned with the use of an H2S-containing stream as a partial source of sulfur recovery plant feed wherein said stream has been derived, for example, from refinery processes involving the treatment of sulfur- and nitrogen-containing compounds with hydrogen.
Inventors
- 👤 John W Palm
- 👤 Kay L Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:33
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0413; C01B17/0421
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
IN AN APPARATUS FOR THE PREPARATION OF ELEMENTAL SULFUR FROM GASES CONTAINING H2S AND NH3, THE IMPROVEMENT COMPRISING THE COMBINATION OF TWO SEPARATE COMBUSTION CHAMBERS OF DIFFERENT SIZE IN PARALLEL, SEPARATE MEANS FOR INJECTION OF AIR AND OF AMMONIA-CONTAINING H2S INTO THE SMALLER OF SAID CHAMBERS AND SEPARATE MEANS FOR INJECTING AN NH3-FREE STREAM OF H2S AND OF AIR INTO THE OTHER OF SAID CHAMBERS, MEANS FOR SAMPLING THE PRODUCTS OF COMBUSTION FROM THE SMALLER OF SAID CHAMBERS, MEANS FOR DETERMINING THE H2S/SO2 RATIO IN THE SAMPLE, MEANS FOR REGULATING THE AIR TO SAID SMALLER CHAMBER BASED ON THE H2S/SO2 RATIO DETERMINED, AND AN ENCLOSED VESSEL HAVING A BOILER SECTION INTO WHICH SAID CHAMBERS DISCHARGE.
Claim 2
Dependent Claim
115 words
IN AN APPARATUS FOR THE PREPARATION OF ELEMENTAL SULFUR FROM GASES CONTAINING H2S AND NH3, THE IMPROVEMENT COMPRISING THE COMBINATION OF TWO SEPARATE COMBUSTION CHAMBERS OF DIFFERENT SIZE IN PARALLEL, SEPARATE MEANS FOR INJECTION OF AIR AND OF AMMONIA-CONTAINING H2S INTO THE SMALLER OF SAID CHAMBERS AND SEPARATE MEANS FOR INJECTING AN NH3-FREE STREAM OF H2S AND OF AIR INTO THE OTHER OF SAID CHAMBERS, MEANS FOR SAMPLING THE PRODUCTS OF COMBUSTION FROM THE SMALLER OF SAID CHAMBERS, MEANS FOR DETERMINING THE H2S/SO2 RATIO IN THE SAMPLE, MEANS FOR REGULATING THE AIR TO SAID SMALLER CHAMBER BASED ON THE H2S/SO2 RATIO DETERMINED, AND AN ENCLOSED VESSEL HAVING A BOILER SECTION INTO WHICH SAID CHAMBERS DISCHARGE.
Claim 3
Dependent Claim
16 words
The apparatus in claim 1 in which said chambers are within a second enclosed metal vessel.
Claim 4
Dependent Claim
42 words
The apparatus in claim 1 in which said chambers discharge into separate boiler sections in said enclosed vessel and said sampling means is located at the discharge end of the boiler section receiving the combustion products from the smaller of said chambers.
Claim 5
Dependent Claim
32 words
The apparatus of claim 2 in which said chambers discharge into a third chamber within said second vessel and thence from said third chamber into an enclosed vessel having a boiler section.
Claim 6
Dependent Claim
27 words
The apparatus in claim 3 wherein said vessel contains a condensing section adapted to receive and condense the sulfur vapor discharging from both of said boiler sections.
Claim 7
Dependent Claim
16 words
The apparatus in claim 2 wherein said chambers are separated by means of a refractory partition.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |