US3774673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for heating gases
Assignee: Centre Rech Metallurgiques SA Distrigaz Nv be
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Filing: 1971-09-08
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Granted: 1973-11-27
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Expires: 1991-09-08
Abstract
Abstract A method for heating of gases, particularly reformed hot gases intended for injection into a shaft furnace, in which the gases undergo a preheating treatment by passing into a heat exchanger composed of two cells, coupled in such a manner that when one is being heated the other is heating the gas and vice versa, the said two cells being interconnected at one of their ends, the said gases being introduced into the cells at the end opposite to that where the connection between the cells is effected and extracted hot at the other end.
Inventors
- 👤 J Ribesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:42
CPC Classifications
F; F28; F28D; F28D17/00; C; C21; C21B; C21B5/00; C21B5/001; C21B9/00; C21B9/10; C21B9/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A method of regeneratively heating a gas, comprising; introducing the gas into a regenerative heat exchanger having two cells coupled so that when one cell is being heated the other cell is heating the gas; extracting the heated gas from either cell through a common connection interconnecting the cells adjacent one end of the cell, the gas being introduced into the cell at the end opposite the said common connection; and maintaining the pressure in the cell which is being heated lower than the pressure in the cell which is heating the gas.
Claim 2
Independent Claim
93 words
A method of regeneratively heating a gas, comprising; introducing the gas into a regenerative heat exchanger having two cells coupled so that when one cell is being heated the other cell is heating the gas; extracting the heated gas from either cell through a common connection interconnecting the cells adjacent one end of the cell, the gas being introduced into the cell at the end opposite the said common connection; and maintaining the pressure in the cell which is being heated lower than the pressure in the cell which is heating the gas.
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1, including heating each of the two cells by means of at least one burner disposed in the cells in the vicinity of the ends where the cells are interconnected.
Claim 4
Dependent Claim
16 words
A method as claimed in claim 2, including feeding the burner with natural gas and air.
Claim 5
Dependent Claim
28 words
A method as claimed in claim 1, including purging each cell after completion of a period of gas heating and before commencement of a period of being heated.
Claim 6
Dependent Claim
71 words
A method as claimed in claim 1, wherein the heat exchanger comprises a common container in which the two cells are disposed end-to-end, gas inlets at the ends of the container, gas outlets at the ends of the cells situated in the median zone of the container, a connection between the two cells in the said median zone, and a gas outlet, common to both cells, communicating with the said connection.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |