US4172708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for use with a reactor for the partial combustion of finely divided solid fuel
Assignee: Shell USA Inc
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Filing: 1978-04-13
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Granted: 1979-10-30
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Expires: 1998-04-13
Abstract
Abstract A process and apparatus, wherein as hot gas from a coal gasifier discharges through a tubular outlet having therein a wall which is permeable throughout its length for the flow of hot gas centrally therethrough, a gas shield is formed along the inner surface of the tubular outlet by passing a coolant through the wall, which gas shield cools the wall and prevents sticky ash particles in the hot gas from hitting the wall. The gas shield also cools the hot gas so that the sticky ash particles lose their stickiness.
Inventors
- 👤 Hsi L. Wu
- 👤 Ian Poll
- 👤 Hendrikus J. A. Hasenack
- 👤 Maarten J. VAN DER Burgt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:41
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/72; C10J3/82; C10J3/84; C10J3/46; C10J3/48; C10J3/482; C10J3/485; C10J3/52; C10J3/523; C10J3/526; C10J3/74; C10J3/76; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0943; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/18; C10J2300/1846; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A process for use at the outlet of product gas from a reactor wherein the partial combustion of finely divided solid carbonaceous fuel containing at least 1% by weight ash occurs, comprising the steps of: providing within a tubular outlet having an inner surface a wall which is permeable throughout its length for the flow of product gas centrally therethrough, forming a protective gas shield against the inner surface of the outlet by passing a coolant through said wall to form the protective gas shield so that the length of the gas shield along the inner surface of the outlet is sufficient to cool the product gas to the point where the ash particles entrained therein are no longer sticky.
Claim 2
Dependent Claim
120 words
A process for use at the outlet of product gas from a reactor wherein the partial combustion of finely divided solid carbonaceous fuel containing at least 1% by weight ash occurs, comprising the steps of: providing within a tubular outlet having an inner surface a wall which is permeable throughout its length for the flow of product gas centrally therethrough, forming a protective gas shield against the inner surface of the outlet by passing a coolant through said wall to form the protective gas shield so that the length of the gas shield along the inner surface of the outlet is sufficient to cool the product gas to the point where the ash particles entrained therein are no longer sticky.
Claim 3
Dependent Claim
16 words
The process according to claim 1, wherein said coolant is recirculated, cooled and purified product gas.
Claim 4
Dependent Claim
29 words
The process according to claim 1, wherein the quantity of said coolant is from 50 to 200% by weight of the weight of said product gas from the reactor.
Claim 5
Dependent Claim
17 words
The process according to claim 1, 2 or 3, wherein the wall forms part of said outlet.
Claim 6
Dependent Claim
24 words
The process according to claim 1, 2 or 3, in which the length of the wall is between one-half and four times its diameter.
Claim 7
Dependent Claim
35 words
The process according to claim 5, wherein said product gas flows from the reactor into the wall through a constriction having a diameter of from 50 to 95% of the internal diameter of the wall.
Claim 8
Dependent Claim
11 words
The process according to claim 1, wherein the coolant comprises steam.
Claim 9
Dependent Claim
35 words
The process according to claim 1, wherein the porosity of the permeable wall is between 0.05 and 0.5% and the velocity of the gaseous coolant while passing the wall is between 0.1 and 10 meters/second.
Claim 10
Independent Claim
105 words
An apparatus for mounting with a reactor for the partial combustion of solid fuel, comprising: a tubular outlet having therein a wall which is permeable throughout its length for the flow of product gas centrally therethrough; means to form a protective gas shield against the inner surface of the tubular outlet; and means for passing a coolant through the permeable wall to form the gas shield in the tubular outlet so that the length of the gas shield along the inner surface of the outlet is sufficient to cool the product gas to the point where the ash particles entrained therein are no longer sticky.
Claim 11
Independent Claim
105 words
An apparatus for mounting with a reactor for the partial combustion of solid fuel, comprising: a tubular outlet having therein a wall which is permeable throughout its length for the flow of product gas centrally therethrough; means to form a protective gas shield against the inner surface of the tubular outlet; and means for passing a coolant through the permeable wall to form the gas shield in the tubular outlet so that the length of the gas shield along the inner surface of the outlet is sufficient to cool the product gas to the point where the ash particles entrained therein are no longer sticky.
Claim 12
Dependent Claim
14 words
The apparatus of claim 9, wherein: the permeable wall is a porous cylindrical wall.
Claim 13
Dependent Claim
33 words
The apparatus of claim 10, wherein: the cylindrical wall is connected with the reactor via a constriction having a diameter which is 50 to 95% of the internal diameter of the cylindrical wall.
Claim 14
Dependent Claim
19 words
The apparatus of claim 10, wherein: said cylindrical wall has a length between one-half and four times its diameter.
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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |