US4488537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and installation for improving the efficiency of a submerged-combustion heating installation
Assignee: Engie SA
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Filing: 1983-09-29
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Granted: 1984-12-18
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Expires: 2003-09-29
Abstract
Abstract The invention relates to a method and installation for improving the efficiency of a submerged-combustion heating installation. According to the invention, to prevent thermal stresses injurious to the combustion chamber (3) and avoid the production or penetration of vapors into the top part of the chamber (16), the installation is ventilated (7) with air after the burners (1) have been turned off, for at least sufficient time for adequately cooling the walls of the combustion chamber (3).
Inventors
- 👤 Francois Laurent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:16
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/004; F23M; F23M11/00; F24; F24H; F24H1/00; F24H1/10; F24H1/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A method for improving the efficiency of a heating system having a submerged combustion chamber surrounded by liquid and burners connected thereto, the steps comprising: igniting the burners; generating forced air which flows past the ignited burners and the inside walls of the chamber thereby heating the air prior to its mixing with the liquid through a submerged outlet of the combustion chamber; extinguishing the burners when the liquid attains a preselected temperature; continuing to generate forced air, after the burners are extinguished, for a preselected delay time corresponding to a time interval sufficient for the walls of the combustion chamber to be cooled to a temperature at or below 100° C. thereby improving the stress resistance of the chamber; creating a parallel branch for the forced air which extends to a point adjacent a burner ignition means; opening the branch for a preselected time interval prior to each burner ignition thereby exposing the burner ignition means to the forced air which removes liquid vapor and prevents the passage of liquid vapor from the submerged outlet to the burner ignition means which would otherwise impair burner ignition.
Claim 2
Independent Claim
187 words
A method for improving the efficiency of a heating system having a submerged combustion chamber surrounded by liquid and burners connected thereto, the steps comprising: igniting the burners; generating forced air which flows past the ignited burners and the inside walls of the chamber thereby heating the air prior to its mixing with the liquid through a submerged outlet of the combustion chamber; extinguishing the burners when the liquid attains a preselected temperature; continuing to generate forced air, after the burners are extinguished, for a preselected delay time corresponding to a time interval sufficient for the walls of the combustion chamber to be cooled to a temperature at or below 100° C. thereby improving the stress resistance of the chamber; creating a parallel branch for the forced air which extends to a point adjacent a burner ignition means; opening the branch for a preselected time interval prior to each burner ignition thereby exposing the burner ignition means to the forced air which removes liquid vapor and prevents the passage of liquid vapor from the submerged outlet to the burner ignition means which would otherwise impair burner ignition.
References Cited (Backward Citations)
US3162234A
Cited
US4299555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |