Patent US4188915A successfully refreshed from Google Patents.
US4188915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-cooled, high-temperature gasifier
Assignee: Dr C Otto and Co GmbH
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Filing: 1978-03-14
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Granted: 1980-02-19
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Expires: 1998-03-14
Abstract
Abstract A system is provided for cooling high-temperature, high-pressure gasifiers having cooling tubes which extend vertically through the walls of the gasifier and are connected in a closed cooling water circulation system. In accordance with the invention, the cooling tubes are coated on the inside of the gasifier with a plasma or flame sprayed ceramic coating, preferably consisting of alumina, and are embedded in a ramming compound such as tamped clay.
Inventors
- 👤 Joachim Kummel
- 👤 Heinz Dressen
- 👤 Wilhelm Danguillier
- 👤 Paul Gernhardt
- 👤 Wolfgang Grams
- 👤 Siegfried Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:11
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1838; F22B1/1846; C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/485; C10J3/72; C10J3/74; C10J3/76; C10J3/78; C10J3/82; C10J3/84; C10J3/845; C10J3/86; F22B1/1884; F22B37/00; F22B37/02; F22B37/10; F22B37/107; F22B37/108; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/18; C10J2300/1861; C10J2300/1884; C10J2300/1892
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
In a high-temperature gasifier, a slag bath generator including a plurality of cooling tubes extending vertically and joined together to form a gas-tight cylindrical wall, said tubes being connected in a closed-water circulating loop, the surfaces of the tubes on the inside of said wall being coated with a ceramic coating, and a ramming compound covering the inside of said wall and embedding said tubes and said ceramic coating thereon.
Claim 2
Dependent Claim
70 words
In a high-temperature gasifier, a slag bath generator including a plurality of cooling tubes extending vertically and joined together to form a gas-tight cylindrical wall, said tubes being connected in a closed-water circulating loop, the surfaces of the tubes on the inside of said wall being coated with a ceramic coating, and a ramming compound covering the inside of said wall and embedding said tubes and said ceramic coating thereon.
Claim 3
Dependent Claim
14 words
The combination defined in claim 1 in which said ceramic coating consists of alumina.
Claim 4
Dependent Claim
19 words
The combination defined in claim 2 in which the coating has a thickness of from 0.2 to 3.0 millimeters.
Claim 5
Dependent Claim
20 words
The combination defined in claim 1 in which said coating is applied by plasma spraying and has a roughened surface.
Claim 6
Dependent Claim
30 words
The combination defined in claim 1 and including retaining means for supporting said ramming compound, said retaining means being supported on said wall but not directly connected to the tubes.
Claim 7
Dependent Claim
15 words
The combination of claim 5 in which the retaining means consists of a metallic mesh.
Claim 8
Dependent Claim
31 words
The combination of claim 6 including vertical web members joining adjacent tubes, said retaining means extending over the tubes and being attached to the web members substantially at the midpoints thereof.
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) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |