Patent US3662719A successfully refreshed from Google Patents.
US3662719A
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Apparatus and process for slag reduction in a vapor generator
Assignee: Foster Wheeler Inc
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Filing: 1970-10-09
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Granted: 1972-05-16
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Expires: 1990-10-09
Abstract
Abstract The formation of slag is reduced on the heat absorption surfaces in the furnace section of a vapor generator. This is achieved by circulating a stream of air through the hopper section of the furnace.
Inventors
- 👤 Justin P Winkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:33
CPC Classifications
F; F23; F23J; F23J1/00; F23M; F23M5/00; F23M5/08; F23J2700/00; F23J2700/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
Apparatus for reducing the temperature in the furnace section of a vapor generator including an air preheater, and formed with walls having an internal heat absorption surface and burners mounted on said walls, comprising a hopper section of said furnace formed with slotted openings, and means for conveying a stream of cooling air from said preheater through said slotted openings such that the temperature in said furnace section is lowered in order to reduce slag formation on the walls of said furnace section.
Claim 2
Dependent Claim
83 words
Apparatus for reducing the temperature in the furnace section of a vapor generator including an air preheater, and formed with walls having an internal heat absorption surface and burners mounted on said walls, comprising a hopper section of said furnace formed with slotted openings, and means for conveying a stream of cooling air from said preheater through said slotted openings such that the temperature in said furnace section is lowered in order to reduce slag formation on the walls of said furnace section.
Claim 3
Dependent Claim
41 words
Apparatus according to claim 1, in which said vapor generator includes a wind box mounted on said furnace section, and a conduit extending from said wind box in flow communication with said hopper section for conveying said stream of cooling air.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |