Hydrogen/oxygen stoichiometric combustion turbine system

Patent metadata

Field	Value
Publication number	US-11608758-B2
Application number	US-201916527649-A
Country	US
Kind code	B2
Filing date	Jul 31, 2019
Priority date	Feb 3, 2017
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

A hydrogen/oxygen stoichiometric combustion turbine system includes: a high-pressure steam turbine ( 2 ); a low-pressure steam turbine ( 3 ); and a heater ( 5 ) disposed between the high-pressure and low-pressure steam turbines. The heater ( 5 ) has a combustion portion ( 53 ) in which stoichiometric combustion of hydrogen and oxygen is caused, and a mixing portion ( 55 ) configured to mix discharged steam (S 4 ) from the high-pressure steam turbine ( 2 ) with combustion gas (R) from the combustion portion ( 53 ) and to supply the obtained product to the low-pressure steam turbine ( 3 ).

First claim

What is claimed is:

1. A hydrogen/oxygen stoichiometric combustion turbine system comprising:
a high-pressure steam turbine;
a low-pressure steam turbine; and
a heater disposed between the high-pressure and low-pressure steam turbines, wherein
the heater has:
a combustion portion in which stoichiometric combustion of hydrogen and oxygen is caused to provide a high-temperature steam; and
a mixing portion configured to mix discharged steam, discharged from the high-pressure steam turbine and directly to the mixing portion, with the high-temperature steam from the combustion portion so as to provide a mixed steam and to supply the mixed steam to the low-pressure steam turbine,

wherein the combustion portion has:
a combustion chamber in which stoichiometric combustion of hydrogen and oxygen is caused; and
a cooling chamber configured to cover the combustion chamber from an outer side and to cool it, and

a part of main steam supplied to the high-pressure steam turbine is introduced as cooling steam into the cooling chamber,
wherein the hydrogen/oxygen stoichiometric combustion turbine system further comprises:
a main pipe that supplies the main steam to the high-pressure steam turbine; and
a cooling pipe that branches from the main pipe to the cooling chamber,

wherein the cooling pipe supplies the part of the main steam directly to the cooling chamber, and
wherein the cooling chamber provides the part of the main steam into the combustion portion.

2. The hydrogen/oxygen stoichiometric combustion turbine system as claimed in claim 1 , wherein
the combustion portion has:
a combustion chamber in which stoichiometric combustion of hydrogen and oxygen is caused; and
an ejector configured to eject the high-temperature steam from the combustion chamber into a mixing chamber, formed in the mixing portion, and to draw the discharged steam, and

the mixing portion has a diffuser configured to expand steam from the ejector, and increase pressure and reduce temperature of the steam.

3. The hydrogen/oxygen stoichiometric combustion turbine system as claimed in claim 1 , wherein
the combustion chamber portion includes a combustion chamber wall that forms the combustion chamber, and
the combustion chamber wall is provided with a steam guiding hole for guiding the cooling steam in the cooling chamber, into the combustion chamber, and allowing film-cooling for an inner surface of the combustion chamber wall.

4. The hydrogen/oxygen stoichiometric combustion turbine system as claimed in claim 1 , further comprising:
a gas turbine engine connected to the low-pressure steam turbine and the high-pressure steam turbine; and
an exhaust gas boiler configured to use exhaust gas of the gas turbine engine as a heat source, wherein
main steam obtained by the exhaust gas boiler is supplied to the high-pressure steam turbine.

5. The hydrogen/oxygen stoichiometric combustion turbine system as claimed in claim 4 , wherein secondary steam obtained at an intermediate portion of the exhaust gas boiler is supplied to an intermediate stage of the low-pressure steam turbine.

6. The hydrogen/oxygen stoichiometric combustion turbine system as claimed in claim 4 , further comprising a generator driven by the low-pressure steam turbine, the high-pressure steam turbine and the gas turbine engine.

7. The hydrogen/oxygen stoichiometric combustion turbine system as claimed in claim 1 , wherein
the high-temperature steam from the combustion portion comprises the part of the main steam mixed with the combustion gas generated by the stoichiometric combustion, and
the discharged steam, discharged from the high-pressure steam turbine, is mixed in the mixing chamber with the high-temperature steam from the combustion portion.

8. A hydrogen/oxygen stoichiometric combustion turbine system comprising:
a high-pressure steam turbine;
a low-pressure steam turbine; and
a heater disposed between the high-pressure and low-pressure steam turbines, wherein
the heater has:
a combustion portion in which stoichiometric combustion of hydrogen and oxygen is caused to provide a high-temperature steam; and
a mixing portion configured to mix discharged steam, discharged from the high-pressure steam turbine, with the high-temperature steam from the combustion portion so as to provide a mixed steam and to supply the mixed steam to the low-pressure steam turbine,

the combustion portion has:
a combustion chamber in which stoichiometric combustion of hydrogen and oxygen is caused; and
a cooling chamber configured to cover the combustion chamber from an outer side and to cool it, and

a part of main steam supplied to the high-pressure steam turbine is introduced as cooling steam into the cooling chamber,
wherein the combustion portion has:
a combustion chamber in which stoichiometric combustion of hydrogen and oxygen is caused: and
a cooling chamber configured to cover the combustion chamber from an outer side and to cool it, and

a part of main steam supplied to the high-pressure steam turbine is introduced as cooling steam into the cooling chamber,
wherein the hydrogen/oxygen stoichiometric combustion turbine system further comprises:
a main pipe that supplies the main steam to the high-pressure steam turbine; and
a cooling pipe that branches from the main pipe to the cooling chamber,

wherein the cooling pipe supplies the part of the main steam directly to the cooling chamber, and
wherein the cooling chamber provides the part of the main steam into the combustion portion.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Tanimura Kazuhiko
• Sano Hikaru
• Nakayama Satoshi
• Miyake Naoki
• Oka Akihisa

Classifications

• F01K25/005 Primary

  the working fluid being steam, created by combustion of hydrogen with oxygen · CPC title

• F01K23/10

  with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence) · CPC title

• F01K25/00 Primary

  Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for · CPC title

• F01K23/106 Primary

  with water evaporated or preheated at different pressures in exhaust boiler · CPC title

• F22B1/1815

  using the exhaust gases of gas-turbines · CPC title