Patent US4483832A successfully refreshed from Google Patents.
US4483832A
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Recovery of heat values from vitiated gaseous mixtures
Assignee: Phillips Petroleum Co
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Filing: 1982-03-30
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Granted: 1984-11-20
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Expires: 2002-03-30
Abstract
Abstract The present invention relates to the recovery of heat values, including sensible heat and/or combustion heat, from vitiated gaseous mixtures containing oxygen and/or combustibles together with inert diluents in which a supplemental fuel is burned, in a combustion zone or the first stage of a two-stage, rich-lean combustion zone, the vitiated gaseous mixture is mixed with the combustion products at the downstream end of the combustion zone or the first stage of the two-stage combustion zone, as the case may be, and the effluent of the combustion is passed to a heat utiization zone.
Inventors
- 👤 Robert M. Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:38
CPC Classifications
F; F23; F23C; F23C6/00; F23C6/04; F23C6/045; F23D; F23D17/00; F23D17/002; F23G; F23G7/00; F23G7/06; F23G7/061; F23G7/065
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
229 words
A method of recovering heat values from a vitiated gaseous mixture, other than products of the present method, containing significant amounts of at least one of oxygen and combustibles together with inert diluents, comprising: (a) burning a supplemental fuel, in a first burning step in a first combustion zone, in the presence of a first volume of air in an amount less than the stoichiometric amount necessary for combustion of all of said supplemental fuel to produce combustion products containing unburned and partially burned supplemental fuel; (b) mixing said vitiated gaseous mixture and a second volume of air with said combustion products of said first burning step adjacent the downstream end of said first combustion zone; (c) said second volume of air being sufficient to produce a total amount of oxygen, including said first volume of air, oxygen, if any, present in said vitiated gaseous mixture and said second volume of air, at least equal to the stoichiometric amount necessary to burn all of said supplemental fuel and all of the combustibles, if any, present in said vitiated gaseous mixture; and (d) burning the combustibles, if any, present in said vitiated gaseous mixture, and the unburned and partially burned fuel content of said combustion products of said first burning step, in a second burning step in a second combustion zone, in the presence of said second volume of air.
Claim 2
Independent Claim
229 words
A method of recovering heat values from a vitiated gaseous mixture, other than products of the present method, containing significant amounts of at least one of oxygen and combustibles together with inert diluents, comprising: (a) burning a supplemental fuel, in a first burning step in a first combustion zone, in the presence of a first volume of air in an amount less than the stoichiometric amount necessary for combustion of all of said supplemental fuel to produce combustion products containing unburned and partially burned supplemental fuel; (b) mixing said vitiated gaseous mixture and a second volume of air with said combustion products of said first burning step adjacent the downstream end of said first combustion zone; (c) said second volume of air being sufficient to produce a total amount of oxygen, including said first volume of air, oxygen, if any, present in said vitiated gaseous mixture and said second volume of air, at least equal to the stoichiometric amount necessary to burn all of said supplemental fuel and all of the combustibles, if any, present in said vitiated gaseous mixture; and (d) burning the combustibles, if any, present in said vitiated gaseous mixture, and the unburned and partially burned fuel content of said combustion products of said first burning step, in a second burning step in a second combustion zone, in the presence of said second volume of air.
Claim 3
Dependent Claim
54 words
A method in accordance with claim 1 wherein the vitiated gaseous mixture in combination with a supplemental fuel, supplemental air or both a supplemental fuel and supplemental air is incapable of stable, sustained combustion at a temperature at which said supplemental fuel is a gas or a liquid or solid in its vapor state.
Claim 4
Dependent Claim
22 words
A method in accordance with claim 1 wherein the vitiated gaseous mixture contains significant amounts of oxygen and insignificant amounts of combustibles.
Claim 5
Dependent Claim
22 words
A method in accordance with claim 1 wherein the vitiated gaseous mixture contains insignificant amounts of oxygen and significant amounts of combustibles.
Claim 6
Dependent Claim
22 words
A method in accordance with claim 1 wherein the vitiated gaseous mixture contains significant amounts of oxygen and significant amounts of combustibles.
Claim 7
Dependent Claim
27 words
A method in accordance with claim 1 wherein the first volume of air is also selected to produce a fuel-air ratio adapted to reduce NO x pollutants.
Claim 8
Dependent Claim
26 words
A method in accordance with claim 1 wherein the first volume of air is between about 35% and about 50% of the total volume of air.
Claim 9
Dependent Claim
42 words
A method in accordance with claim 1, 2, 3, 4, 5, 6 or 7 wherein the burning at the downstream end of the combustion chamber is abruptly terminated, at least in part, by mixing the vitiated gaseous mixture with the combustion products.
Claim 10
Dependent Claim
44 words
A method in accordance with claim 8 wherein the burning at the downstream end of the combustion zone is abruptly terminated by, at least in part, abruptly expanding the fluids in said combustion zone adjacent the point of introducing of the vitiated gaseous mixture.
Claim 11
Dependent Claim
33 words
A method in accordance with claim 9 wherein the vitiated gaseous mixture is introduced into the combustion products immediately before or immediately after the abrupt expansion of the fluids in the combustion zone.
Claim 12
Dependent Claim
42 words
A method in accordance with claim 9 wherein the burning at the downstream end of the combustion zone is abruptly terminated by, at least in part, reducing the peripheral dimension of the fluids in said combustion zone prior to the abrupt expansion.
Claim 13
Dependent Claim
49 words
A method in accordance with claim 11 wherein the vitiated gaseous mixture is introduced into the combustion products before the reduced peripheral dimension of the fluids in the combustion zone, into the reduced peripheral dimension portion of said fluids or after the reduction in peripheral dimension of said fluids.
Claim 14
Dependent Claim
23 words
A method in accordance with claim 12 wherein the vitiated gaseous mixture is introduced into the reduced peripheral dimension portion of the fluids.
Claim 15
Independent Claim
25 words
A method in accordance with claims 1, 2, 3, 4, 5, 6 or 7 wherein the second combustion zone is also a heat utilization zone.
Claim 16
Dependent Claim
15 words
A method in accordance with claim 14 wherein the heat utilization zone is a furnace.
Claim 17
Dependent Claim
19 words
A method in accordance with claim 14 wherein the heat utilization zone is a boiler adapted to produce steam.
Claim 18
Dependent Claim
31 words
A method in accordance with claim 1, 2, 3, 4, 5, 6 or 7 wherein the flue gas from the second combustion zone is thereafter passed to a heat utilization zone.
Claim 19
Dependent Claim
15 words
A method in accordance with claim 17 wherein the heat utilization zone is a furnace.
Claim 20
Dependent Claim
19 words
A method in accordance with claim 17 wherein the heat utilization zone is a boiler adapted to produce steam.
Claim 21
Dependent Claim
24 words
A method in accordance with claim 1, 2, 3, 4, 5, 6 or 7 wherein the vitiated gaseous mixture is at an elevated temperature.
Claim 22
Dependent Claim
18 words
A method in accordance with claim 8 wherein the second combustion zone is also a heat utilization zone.
Claim 23
Dependent Claim
18 words
A method in accordance with claim 9 wherein the second combustion zone is also a heat utilization zone.
Claim 24
Dependent Claim
18 words
A method in accordance with claim 10 wherein the second combustion zone is also a heat utilization zone.
Claim 25
Dependent Claim
18 words
A method in accordance with claim 11 wherein the second combustion zone is also a heat utilization zone.
Claim 26
Dependent Claim
18 words
A method in accordance with claim 12 wherein the second combustion zone is also a heat utilization zone.
Claim 27
Dependent Claim
18 words
A method in accordance with claim 13 wherein the second combustion zone is also a heat utilization zone.
Claim 28
Dependent Claim
24 words
A method in accordance with claim 8 wherein the flue gas from the second combustion zone is thereafter passed to a heat utilization zone.
Claim 29
Dependent Claim
24 words
A method in accordance with claim 9 wherein the flue gas from the second combustion zone is thereafter passed to a heat utilization zone.
Claim 30
Dependent Claim
24 words
A method in accordance with claim 10 wherein the flue gas from the second combustion zone is thereafter passed to a heat utilization zone.
Claim 31
Dependent Claim
24 words
A method in accordance with claim 11 wherein the flue gas from the second combustion zone is thereafter passed to a heat utilization zone.
Claim 32
Dependent Claim
24 words
A method in accordance with claim 12 wherein the flue gas from the second combustion zone is thereafter passed to a heat utilization zone.
Claim 33
Dependent Claim
24 words
A method in accordance with claim 13 wherein the flue gas from the second combustion zone is thereafter passed to a heat utilization zone.
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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |