US3712371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat recovery from synthesis gas
Assignee: Shell USA Inc
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Filing: 1970-11-06
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Granted: 1973-01-23
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Expires: 1990-11-06
Abstract
Abstract An improved method and apparatus for cooling and recovering heat from soot-containing hot gases obtained by the partial combustion of hydrocarbons is disclosed. The improvement comprises partly cooling the hot gases by flowing them through one or more straight tubes of at least two meters in length at a mass velocity of at least 100 kg/m2/sec. The gases are subsequently further cooled in one or more helically coiled tubes connected to the straight tubes. The invention is particularly suitable for generating high pressure steam from hot gases obtained at moderate as well as high pressures.
Inventors
- 👤 Haar L Ter
- 👤 J Schungel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:10
CPC Classifications
B; B01; B01D; B01D51/00; B01D51/10; C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; F; F28; F28D; F28D7/00; F28D7/005; F28D7/02; F28D7/024; B01J; B01J19/00; B01J19/0006; F28D21/00; F28D2021/0019; F28D2021/0075; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/436; Y10S165/437; Y10S165/438
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
22 words
The process of claim 1 wherein the water is in substantially parallel flow with the hot gases flowing in the straight tube.
Claim 2
Dependent Claim
16 words
The process of claim 1 wherein the straight tube has a length of from 4-6 meters.
Claim 3
Dependent Claim
22 words
The process of claim 3 wherein the gas is flowed through the straight tube at a mass velocity of from 200-350 kg/m2/sec.
References Cited (Backward Citations)
CA634687A
Cited
US2967515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |