Patent US768915A successfully refreshed from Google Patents.
Patent US4775314A successfully refreshed from Google Patents.
US4775314A
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US
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Coal gasification burner
Assignee: Shell USA Inc
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Filing: 1987-01-06
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Granted: 1988-10-04
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Expires: 2007-01-06
Abstract
Abstract A transpiration-protected burner for coal gasification in which a gas such as steam, product synthesis gas or nitrogen is introduced through a porous wall immediately surrounding the openings through which coal and oxygen are introduced.
Inventors
- 👤 Charles V. Sternling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:28
CPC Classifications
F; F23; F23D; F23D1/00; C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/50; C10J3/506; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0959; C10J2300/0973; C10J2300/0976; F23D2214/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A process for burning hydrocarbon in a combustion zone, comprising: introducing combustion oxygen and said hydrocarbon into a combustion chamber as a central gas flow; surrounding said combustion oxygen with a transpiration gas; and passing at least some of the transpiration gas through a porous metal passage surrounding the combustion oxygen and having a non-constricted part of lower porosity metal next to the combustion zone, said porous metal comprising a compressed powdered metal.
Claim 2
Dependent Claim
73 words
A process for burning hydrocarbon in a combustion zone, comprising: introducing combustion oxygen and said hydrocarbon into a combustion chamber as a central gas flow; surrounding said combustion oxygen with a transpiration gas; and passing at least some of the transpiration gas through a porous metal passage surrounding the combustion oxygen and having a non-constricted part of lower porosity metal next to the combustion zone, said porous metal comprising a compressed powdered metal.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the hydrocarbon is introduced with conveying gas into the combustion oxygen.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the transpiration gas is one or a mixture of water, nitrogen, carbon monoxide and hydrogen.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein the oxygen includes steam.
Claim 6
Dependent Claim
85 words
A burner for use in burning a hydrocarbon, comprising: three essentially coaxial spaced-apart tubes; a passage within the inner tube for conveying hydrocarbon and conveying gas to a combustion zone; a passage between the inner tube and the intermediate tube for conveying oxygen to the combustion zone; and a passage between the intermediate tube and the outer tube comprised of porous metal for conveying a transpiration gas to the combustion zone and having a non-constricted part of lower porosity metal closest to the combustion zone.
Claim 7
Dependent Claim
85 words
A burner for use in burning a hydrocarbon, comprising: three essentially coaxial spaced-apart tubes; a passage within the inner tube for conveying hydrocarbon and conveying gas to a combustion zone; a passage between the inner tube and the intermediate tube for conveying oxygen to the combustion zone; and a passage between the intermediate tube and the outer tube comprised of porous metal for conveying a transpiration gas to the combustion zone and having a non-constricted part of lower porosity metal closest to the combustion zone.
Claim 8
Dependent Claim
14 words
The burner of claim 5 wherein the intermediate tube extends beyond the inner tube.
Claim 9
Dependent Claim
14 words
The burner of claim 5 wherein the porous metal comprises a compressed powdered metal.
Claim 10
Dependent Claim
30 words
The burner of claim 5 wherein the part of the porous metal passage closest to the combustion zone is of lower porosity than the remainder of the porous metal passage.
Claim 11
Dependent Claim
107 words
A burner for use in burning a hydrocarbon, comprising: three essentially coaxial spaced-apart tubes; a passage within the inner tube for conveying hydrocarbon and conveying gas to a combustion zone; a passage between the inner tube and the intermediate tube for conveying oxygen to the combustion zone; and a passage between the intermediate tube and the outer tube comprised of porous metal for conveying a transpiration gas to the combustion zone, the intermediate tube having a portion of reduced diameter which extends beyond the inner tube and a porous metal of lower porosity than the remainder of the porous metal passage encircling said portion of reduced diameter.
Claim 12
Dependent Claim
107 words
A burner for use in burning a hydrocarbon, comprising: three essentially coaxial spaced-apart tubes; a passage within the inner tube for conveying hydrocarbon and conveying gas to a combustion zone; a passage between the inner tube and the intermediate tube for conveying oxygen to the combustion zone; and a passage between the intermediate tube and the outer tube comprised of porous metal for conveying a transpiration gas to the combustion zone, the intermediate tube having a portion of reduced diameter which extends beyond the inner tube and a porous metal of lower porosity than the remainder of the porous metal passage encircling said portion of reduced diameter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |