Patent US1072273A successfully refreshed from Google Patents.
Patent US5216885A successfully refreshed from Google Patents.
US5216885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustor for burning a premixed gas
Assignee: Hitachi Ltd
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Filing: 1990-03-20
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Granted: 1993-06-08
•
Expires: 2010-03-20
Abstract
Abstract Method of burning a premixed gas and a combustor for practicing the method. A jet of the premixed gas is burnt from an inside to an outside of the jet to form a premix flame. A burned gas is mixed into the premixed gas from the outside of the jet. The burned gas is produced when premixed gas is burned.
Inventors
- 👤 Masayuki Taniguchi
- 👤 Yasuo Yoshii
- 👤 Tadayoshi Murakami
- 👤 Shigeru Azuhata
- 👤 Norio Arashi
- 👤 Kenichi Sohma
- 👤 Michio Kuroda
- 👤 Hironobu Kobayashi
- 👤 Yoji Ishibashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:04
CPC Classifications
F; F23; F23C; F23C9/00; F23C9/006; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/10; F23C6/00; F23C6/04; F23C6/045; F23C6/047; F23C7/00; F23D; F23D14/00; F23D14/46; F23D14/70; F23R; F23R3/00; F23R3/02; F23R3/28; F23R3/34; F23R3/346; F23C2202/00; F23C2202/40; F23D2209/00; F23D2209/20
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
105 words
A combustor comprising: a combustion chamber; at least one nozzle for ejecting a jet of a premixed gas containing fuel and air through an exhaust port thereof; baffle means arranged in a vicinity of the exhaust port of the nozzle and downstream of an end of the exhaust port for baffling the jet of the premixed gas so as to form a circulating flow downstream thereof, wherein said combustion chamber has a cross-sectional area enlarging from that of the end of the exhaust port of the nozzle, and wherein the baffle means is smaller than an opening area of the exhaust port of the nozzle.
Claim 2
Dependent Claim
105 words
A combustor comprising: a combustion chamber; at least one nozzle for ejecting a jet of a premixed gas containing fuel and air through an exhaust port thereof; baffle means arranged in a vicinity of the exhaust port of the nozzle and downstream of an end of the exhaust port for baffling the jet of the premixed gas so as to form a circulating flow downstream thereof, wherein said combustion chamber has a cross-sectional area enlarging from that of the end of the exhaust port of the nozzle, and wherein the baffle means is smaller than an opening area of the exhaust port of the nozzle.
Claim 3
Dependent Claim
16 words
A combustor as recited in claim 1, further comprising cooling means for cooling the baffle means.
Claim 4
Dependent Claim
21 words
A combustor as recited in claim 1, wherein a plurality of nozzles are provided and are arranged along a common circumference.
Claim 5
Dependent Claim
34 words
A combustor as recited in claim 1, further comprising a second nozzle for forming one of a premixed flame and a diffusion flame at one of upstream or downstream positions of the first nozzle.
Claim 6
Dependent Claim
100 words
A combustor comprising: a nozzle including an exhaust port, the nozzle ejecting an annular jet of a premixed gas containing fuel and air through the exhaust port; recirculating flow forming means arranged in a vicinity of the exhaust port of the nozzle for bifurcating a flame of the annular jet into two concentric annular flames at a bifurcating position, thereby forming a recirculating flow of a burned gas, produced by combustion of the premixed gas, downstream of the bifurcating position; and burned gas mixing means for mixing the burned gas into the premixed gas outwardly of the bifurcated premixed gas.
Claim 7
Dependent Claim
100 words
A combustor comprising: a nozzle including an exhaust port, the nozzle ejecting an annular jet of a premixed gas containing fuel and air through the exhaust port; recirculating flow forming means arranged in a vicinity of the exhaust port of the nozzle for bifurcating a flame of the annular jet into two concentric annular flames at a bifurcating position, thereby forming a recirculating flow of a burned gas, produced by combustion of the premixed gas, downstream of the bifurcating position; and burned gas mixing means for mixing the burned gas into the premixed gas outwardly of the bifurcated premixed gas.
Claim 8
Dependent Claim
53 words
A combustor as recited in claim 5, further comprising: a combustion chamber communicating with the exhaust port of the nozzle; and means for sharply enlarging a cross-sectional area of the combustion chamber from the exhaust port of the nozzle, the cross section being taken substantially perpendicularly to the jet of the premixed gas.
Claim 9
Dependent Claim
115 words
A combustor comprising: a plurality of combustion chambers; a nozzle arranged within at least one of the combustion chambers for ejecting a jet of a premixed gas containing fuel and air to form a premix flame; first recirculating flow forming means for forming a first recirculating flow of a first burned gas within the premix flame, the first burned gas being produced from the premix flame; second recirculating flow forming means for forming the second recirculating flow of the first burned gas outside the premix flame; and burning gas mixing means for mixing a second burned gas into the premixed flame, the second burned gas being produced in another of said plurality of combustion chambers.
Claim 10
Dependent Claim
115 words
A combustor comprising: a plurality of combustion chambers; a nozzle arranged within at least one of the combustion chambers for ejecting a jet of a premixed gas containing fuel and air to form a premix flame; first recirculating flow forming means for forming a first recirculating flow of a first burned gas within the premix flame, the first burned gas being produced from the premix flame; second recirculating flow forming means for forming the second recirculating flow of the first burned gas outside the premix flame; and burning gas mixing means for mixing a second burned gas into the premixed flame, the second burned gas being produced in another of said plurality of combustion chambers.
Claim 11
Dependent Claim
117 words
A combustor comprising: a first combustion chamber for forming a predetermined flame; a second combustion chamber for burning a premixed gas containing fuel and air; a nozzle for ejecting the premixed gas through an exhaust port thereof; baffle means arranged in a vicinity of the exhaust port of the nozzle and downstream of an end of the exhaust port for baffling the jet of the premixed gas so as to form a circulating flow downstream thereof; and means for mixing a burned gas produced in the first combustion chamber into the premixed gas, and wherein said second combustion chamber has a cross-sectional area sharply enlarging from that of the end of the exhaust port of the nozzle.
Claim 12
Dependent Claim
117 words
A combustor comprising: a first combustion chamber for forming a predetermined flame; a second combustion chamber for burning a premixed gas containing fuel and air; a nozzle for ejecting the premixed gas through an exhaust port thereof; baffle means arranged in a vicinity of the exhaust port of the nozzle and downstream of an end of the exhaust port for baffling the jet of the premixed gas so as to form a circulating flow downstream thereof; and means for mixing a burned gas produced in the first combustion chamber into the premixed gas, and wherein said second combustion chamber has a cross-sectional area sharply enlarging from that of the end of the exhaust port of the nozzle.
Claim 13
Dependent Claim
25 words
A combustor as recited in claim 8, wherein the predetermined flame formed in the first combustion chamber comprises a premix flame and a pilot flame.
Claim 14
Dependent Claim
22 words
A combustor as recited in claim 8, wherein the predetermined flame formed in the first combustion chamber is of a diffusion flame.
Claim 15
Dependent Claim
22 words
A combustor as recited in claim 8, wherein the predetermined flame formed in the first combustion chamber is of a premix flame.
Claim 16
Dependent Claim
19 words
A combustor as recited in one of claims 8 or 14, wherein the nozzle is an annularly shaped nozzle.
Claim 17
Dependent Claim
31 words
A combustor as recited in claim 12, wherein the annularly shaped nozzle comprises a plurality of partitions for radially partitioning the nozzle for form separate subnozzles each having an exhaust subport.
Claim 18
Dependent Claim
24 words
A combustor as recited in one of claims 8 or 10, wherein the first combustion chamber is arranged upstream of the second combustion chamber.
Claim 19
Dependent Claim
35 words
A gas turbine combustor using a combustor as recited in one of claims 1, 5, 7, 8 or 10, further comprising a burned gas exhausting means for exhausting the burned gas to a gas turbine.
Claim 20
Dependent Claim
163 words
A combustor comprising: a first combustion chamber for forming a predetermined flame; a second combustion chamber, communicated with the first combustion chamber, for forming a premix flame; an annular nozzle, having an exhaust port, for injecting the premixed gas into the second combustion chamber through the exhaust port, the nozzle comprising a plurality of partitions for radially partitioning the nozzle for forming separate subnozzles each having an exhaust subport; baffle means for baffling a jet of the premixed gas injected into the second combustion chamber so that a recirculating flow of a first burned gas is formed downstream of the jet, the first burned gas generated by combustion of the premixed gas, the baffle means has an annular shape and is arranged along each subnozzle downstream of the exhaust subport thereof; and burned gas mixing means for mixing both the first burned gas and a second burned gas into the premix flame, the second burned gas being produced in the first combustion chamber.
Claim 21
Dependent Claim
163 words
A combustor comprising: a first combustion chamber for forming a predetermined flame; a second combustion chamber, communicated with the first combustion chamber, for forming a premix flame; an annular nozzle, having an exhaust port, for injecting the premixed gas into the second combustion chamber through the exhaust port, the nozzle comprising a plurality of partitions for radially partitioning the nozzle for forming separate subnozzles each having an exhaust subport; baffle means for baffling a jet of the premixed gas injected into the second combustion chamber so that a recirculating flow of a first burned gas is formed downstream of the jet, the first burned gas generated by combustion of the premixed gas, the baffle means has an annular shape and is arranged along each subnozzle downstream of the exhaust subport thereof; and burned gas mixing means for mixing both the first burned gas and a second burned gas into the premix flame, the second burned gas being produced in the first combustion chamber.
Claim 22
Dependent Claim
54 words
A combustor as recited in claim 16, wherein an area of a cross section of the baffle means is smaller than an area of the exhaust port of the annular nozzle, the cross section being taken in a direction substantially perpendicularly to a flow direction of the premixed gas ejected from the annular nozzle.
Claim 23
Dependent Claim
32 words
A combustor according to claim 16, wherein a projection area taken in a downstream direction of the baffle means, is smaller than an opening area of the exhaust port of the nozzle.
Claim 24
Dependent Claim
142 words
A combustor comprising: a first combustion chamber for forming a predetermined flame; a second combustion chamber, communicating with the first combustion chamber, for forming a premix flame; an annular nozzle, having an exhaust port, for injecting a premixed gas into the second combustion chamber through the exhaust port; baffle means for baffling a jet of the premixed gas injected into the second combustion chamber so that a recirculating flow of a first burned gas is formed downstream of the jet, the first burned gas being generated by combustion of the premixed gas, the baffle means has an annular shape and is arranged downstream of the exhaust port of the annular nozzle; and burned gas mixing means for mixing both the first burned gas and a second burned gas into the premix flame, the second burned gas produced in the first combustion chamber.
Claim 25
Dependent Claim
142 words
A combustor comprising: a first combustion chamber for forming a predetermined flame; a second combustion chamber, communicating with the first combustion chamber, for forming a premix flame; an annular nozzle, having an exhaust port, for injecting a premixed gas into the second combustion chamber through the exhaust port; baffle means for baffling a jet of the premixed gas injected into the second combustion chamber so that a recirculating flow of a first burned gas is formed downstream of the jet, the first burned gas being generated by combustion of the premixed gas, the baffle means has an annular shape and is arranged downstream of the exhaust port of the annular nozzle; and burned gas mixing means for mixing both the first burned gas and a second burned gas into the premix flame, the second burned gas produced in the first combustion chamber.
Claim 26
Dependent Claim
24 words
A combustor according to one of claims 16 or 19, wherein the predetermined flame formed in the first combustion chamber is a diffusion flame.
Claim 27
Dependent Claim
170 words
A gas turbine combustor comprising: a first annular nozzle, having an exhaust port, for ejecting an annular jet of a first premixed gas through the exhaust port, the first premixed gas containing primary fuel and air; annular baffle means for baffling the annular first premixed gas jet to bifurcate the first premixed gas jet into two concentric annular jets; a primary combustion chamber in communication with the exhaust port of the first nozzle, the primary combustion chamber sharply enlarging a cross-sectional area thereof from the exhaust port of the first annular nozzle; a second annular nozzle including an exhaust port for ejecting an annular jet of a secondary premixed gas, through the exhaust port thereof, the second annular nozzle being arranged downstream of the primary combustion chamber and having an inner diameter larger than an outer diameter of the first annular nozzle, the secondary premixed gas containing secondary fuel and air; and a secondary combustion chamber adapted to receive the secondary premixed gas injected therein from the second annular nozzle.
Claim 28
Dependent Claim
170 words
A gas turbine combustor comprising: a first annular nozzle, having an exhaust port, for ejecting an annular jet of a first premixed gas through the exhaust port, the first premixed gas containing primary fuel and air; annular baffle means for baffling the annular first premixed gas jet to bifurcate the first premixed gas jet into two concentric annular jets; a primary combustion chamber in communication with the exhaust port of the first nozzle, the primary combustion chamber sharply enlarging a cross-sectional area thereof from the exhaust port of the first annular nozzle; a second annular nozzle including an exhaust port for ejecting an annular jet of a secondary premixed gas, through the exhaust port thereof, the second annular nozzle being arranged downstream of the primary combustion chamber and having an inner diameter larger than an outer diameter of the first annular nozzle, the secondary premixed gas containing secondary fuel and air; and a secondary combustion chamber adapted to receive the secondary premixed gas injected therein from the second annular nozzle.
Claim 29
Dependent Claim
38 words
A gas turbine combustor as recited in claim 21, further comprising: baffle means for baffling an annular jet of the secondary premixed gas to bifurcate a jet of the secondary premixed gas into two concentric annular bifurcated jets.
Claim 30
Dependent Claim
47 words
A gas turbine combustor as recited in one of claims 21 or 22, wherein the secondary combustion chamber sharply enlarges in cross-sectional area from the exhaust port of the second annular nozzle, the cross section being taken substantially perpendicularly to the jet of the secondary premixed gas.
Claim 31
Dependent Claim
37 words
A gas turbine combustion as recited in one of claims 21 or 22, wherein the primary combustion chamber includes an upstream end, further comprising a pilot burner arranged at the upstream end of the primary combustion chamber.
Claim 32
Dependent Claim
107 words
A gas turbine combustor comprising: a primary combustion chamber for forming a diffusion flame; an annular nozzle including an exhaust port for ejecting an annular jet of a premixed gas, the premixed gas containing fuel and air, the annular nozzle being disposed downstream of the primary combustion chamber; annular baffle means for baffling the annular jet of the premixed gas to bifurcate the premixed gas jet into two concentric bifurcated jets of the premixed gas; and a second combustion chamber sharply enlarging in cross-sectional area from the exhaust port of the annular nozzle, the cross section being taken substantially perpendicularly to the jet of the premixed gas.
Claim 33
Dependent Claim
107 words
A gas turbine combustor comprising: a primary combustion chamber for forming a diffusion flame; an annular nozzle including an exhaust port for ejecting an annular jet of a premixed gas, the premixed gas containing fuel and air, the annular nozzle being disposed downstream of the primary combustion chamber; annular baffle means for baffling the annular jet of the premixed gas to bifurcate the premixed gas jet into two concentric bifurcated jets of the premixed gas; and a second combustion chamber sharply enlarging in cross-sectional area from the exhaust port of the annular nozzle, the cross section being taken substantially perpendicularly to the jet of the premixed gas.
Claim 34
Dependent Claim
70 words
A gas turbine power generation arrangement, the arrangement comprising: a gas turbine combustor as recited in claim 28; a gas turbine in communication with the gas turbine combustor to receive a burned gas from the gas turbine combustor for driving the gas turbine, the burned gas being produced in the gas turbine combustion; and a generator operatively connected to the gas turbine for driving the generator to generate electric power.
Claim 35
Dependent Claim
98 words
A cogeneration system comprising: a gas turbine combustor as recited in claim 25; a gas turbine in communication with the gas turbine combustor to receive a burned gas from the gas turbine combustor for driving the gas turbine, the burned gas being produced in the gas turbine combustor; a generator operatively connected to the gas turbine for driving the generator to generate electric power; and an exhaust heat recovery boiler in communication with the gas turbine for receiving the burned gas exhausted from the gas turbine and adapted to generate steam by heat exchange with the burned gas.
Claim 36
Dependent Claim
94 words
A burner having an exhaust port for ejecting a jet of pressurized gas containing fuel and air, comprising: baffle means arranged in a vicinity of the exhaust port downstream of an end of the exhaust port of the nozzle for baffling the jet of the premixed gas so as to form a circulating flow downstream thereof; and space defining means formed downstream of the end of the exhaust port for defining a space sharply enlarging from the exhaust port, and wherein the baffle means is smaller than an opening are of the exhaust port.
Claim 37
Dependent Claim
94 words
A burner having an exhaust port for ejecting a jet of pressurized gas containing fuel and air, comprising: baffle means arranged in a vicinity of the exhaust port downstream of an end of the exhaust port of the nozzle for baffling the jet of the premixed gas so as to form a circulating flow downstream thereof; and space defining means formed downstream of the end of the exhaust port for defining a space sharply enlarging from the exhaust port, and wherein the baffle means is smaller than an opening are of the exhaust port.
Claim 38
Dependent Claim
12 words
A combustor having a burner as recited in claim 28 mounted thereto.
Claim 39
Dependent Claim
120 words
A combustor comprising: a combustion chamber for burning a premixed gas containing fuel and air; a nozzle for ejecting an annular jet of the premixed gas through an exhaust port thereof; baffle means, arranged in a vicinity of an exhaust port of the nozzle and downstream of an end of the exhaust port of the nozzle, for bifurcating the annular jet of the premixed gas into two concentric annular flames at a bifurcating position so as to form a circulating flow of a burned gas, produced by the combustion of the premixed gas, downstream of the bifurcating position, and wherein said combustion chamber has a cross-sectional area sharply enlarging that of the end of the exhaust port of the nozzle.
Claim 40
Dependent Claim
120 words
A combustor comprising: a combustion chamber for burning a premixed gas containing fuel and air; a nozzle for ejecting an annular jet of the premixed gas through an exhaust port thereof; baffle means, arranged in a vicinity of an exhaust port of the nozzle and downstream of an end of the exhaust port of the nozzle, for bifurcating the annular jet of the premixed gas into two concentric annular flames at a bifurcating position so as to form a circulating flow of a burned gas, produced by the combustion of the premixed gas, downstream of the bifurcating position, and wherein said combustion chamber has a cross-sectional area sharply enlarging that of the end of the exhaust port of the nozzle.
Claim 41
Dependent Claim
149 words
A combustor comprising: a plurality of combustion chambers; a nozzle arranged within a first combustion chamber for ejecting a jet of premixed gas containing fuel and air through an exhaust port thereof so as to form a premixed flame; baffle means, arranged in a vicinity of the exhaust port of the nozzle and downstream of an end of the exhaust port of the nozzle for baffling the jet of premixed gas so as to form a circulating flow downstream thereof; and means for mixing a burned gas produced by a second combustion chamber of the plurality of combustion chambers other than the first chamber in which the nozzle for ejecting the premixed gas jet is arranged to form the premix flame, into the premix flame, and wherein said first combustion chamber has a cross-sectional area sharply enlarging from that of the end of the exhaust port of the nozzle.
Claim 42
Dependent Claim
149 words
A combustor comprising: a plurality of combustion chambers; a nozzle arranged within a first combustion chamber for ejecting a jet of premixed gas containing fuel and air through an exhaust port thereof so as to form a premixed flame; baffle means, arranged in a vicinity of the exhaust port of the nozzle and downstream of an end of the exhaust port of the nozzle for baffling the jet of premixed gas so as to form a circulating flow downstream thereof; and means for mixing a burned gas produced by a second combustion chamber of the plurality of combustion chambers other than the first chamber in which the nozzle for ejecting the premixed gas jet is arranged to form the premix flame, into the premix flame, and wherein said first combustion chamber has a cross-sectional area sharply enlarging from that of the end of the exhaust port of the nozzle.
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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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |