Patent EP0083109A2 successfully refreshed from Google Patents.
EP0083109A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Combined plant having steam turbine and gas turbine connected by single shaft
Assignee: Hitachi Ltd
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Filing: 1982-12-28
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Granted: —
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Expires: 2002-12-28
Abstract
Abstract A combined plant including a gas turbine (5), a steam turbine (8) and a waste heat recovery boiler (13) using exhaust gases of the gas turbine as a heat source for producing steam serving as a drive source of the steam turbine further Includes an ancillary steam source (30) separate from and independent of the waste heat recovery boiler. At the time of startup of the plant, steam from the ancillary steam source is introduced into the steam turbine until the conditions for feeding air to the waste heat recovery boiler are set, to thereby avoid overheating of the steam turbine due to a windage loss.
Inventors
- 👤 Akira Okabe
- 👤 Haruo Urushidani
- 👤 Katsuto Kashiwahara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 15:30
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/12; F01K23/16; F01K13/00; F01K13/02; F01K13/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
1 . A combined plant comprising a gas turbine, a steam turbine and a waste heat recovery boiler using exhaust gases of said gas turbine as a heat source for producing steam serving as a drive source of said steam turbine, said gas turbine and said steam turbine being connected together by a single shaft, wherein the improvement comprises: a ancillary steam source (30); ancillary steam line means (31) connected to steam line means (18; 21) for introducing the steam generated by said waste heat recovery boiler (13) to said steam turbine (8); and an ancillary steam control valve (32) mounted in said ancillary steam line means (31) whereby ancillary steam can be introduced through said ancillary steam line means (31) into said steam turbine (8) when said plant is started, to thereby avoid overheating of the steam turbine (8).
Claim 2
Dependent Claim
140 words
1 . A combined plant comprising a gas turbine, a steam turbine and a waste heat recovery boiler using exhaust gases of said gas turbine as a heat source for producing steam serving as a drive source of said steam turbine, said gas turbine and said steam turbine being connected together by a single shaft, wherein the improvement comprises: a ancillary steam source (30); ancillary steam line means (31) connected to steam line means (18; 21) for introducing the steam generated by said waste heat recovery boiler (13) to said steam turbine (8); and an ancillary steam control valve (32) mounted in said ancillary steam line means (31) whereby ancillary steam can be introduced through said ancillary steam line means (31) into said steam turbine (8) when said plant is started, to thereby avoid overheating of the steam turbine (8).
Claim 3
Dependent Claim
102 words
A combined plant as claimed in claim 1, wherein said steam line means(18, 23) leading the steam from said waste heat recovery plant (13) comprises a high pressure steam line (18) for introducing high pressure steam to a high pressure turbine section (9) of said steam turbine (8), and a low pressure steam line (23) for introducing low pressure steam to a low pressure turbine section (10) of said steam turbine (8), and wherein said ancillary steam line means (31) is connected between a control valve (20) and a main steam stop valve (19) mounted in said high pressure steam line (18).
Claim 4
Dependent Claim
102 words
A combined plant as claimed in claim 1, wherein said steam line means (18, 23) for leading the steam from said waste heat recovery boiler (13) comprises a high pressure steam line (18) for introducing high pressure steam into a high pressure turbine section (9) of said steam turbine (8), and a low pressure steam line (23) for introducing low pressure steam to a low pressure turbine section (10) of said steam turbine (8), and wherein said ancillary steam line means (31) is connected to the upstream side of a steam stop valve (24) mounted in said low pressure steam line (23).
Claim 5
Dependent Claim
104 words
A combined plant as claimed in claim 3, further comprising a release line (39) branching from said high pressure steam line (18) in a portion thereof between said control valve (20) and said main steam stop valve (19) and connected to a condenser (11) so that a portion of the ancillary steam introduced to the low pressure turbine section (10) of the steam turbine (8) through said low pressure steam line (23) can be made to flow back to the high pressure turbine section (9) to effect warmup and then can be made to flow through said release line (39) to the condenser (11).
Claim 6
Dependent Claim
47 words
A combined plant as claimed in claim 3, further comprising valve means (28) mounted in the low pressure steam line (23) located on the upstream side of the position (38) in which said ancillary steam line means (31) is connected to avoid backflow of the ancillary steam.
Claim 7
Dependent Claim
33 words
A combined plant as claimed in claim 1, wherein said ancillary steam control valve (32) is adapted to be closed when conditions of steam of said waste heat recovery boiler (13) are set.
References Cited (Backward Citations)
No citation records indexed.
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