Combined cycle plant and plant building thereof
A plant building includes: a building main body that continues in an array direction in which a plurality of single-shaft combined units are arrayed, and has a roof that covers the upper side of the plurality of single-shaft combined units; a first overhead crane that is disposed inside the building main body, and has a girder capable of traveling in the array direction across a region including the upper side of gas turbines of the plurality of single-shaft combined units; and a second overhead crane that is disposed inside the building main body, and has a girder capable of traveling in the array direction across a region including the upper side of steam turbines of the plurality of single-shaft combined units.
1. A plant building of a combined cycle plant that includes a plurality of single-shaft combined units each having a gas turbine, a generator, and a steam turbine disposed on a same axis, the axes of the plurality of single-shaft combined units being parallel to one another, the plant building comprising:
a building main body having a roof that continues in an array direction in which the plurality of single-shaft combined units are arrayed and covers an upper side of the plurality of single-shaft combined units;
a first overhead crane that is disposed inside the building main body, and has a girder capable of traveling in the array direction across a region including the upper side of the gas turbines of the plurality of single-shaft combined units; and
a second overhead crane that is disposed inside the building main body, and has a girder capable of traveling in the array direction across a region including the upper side of the steam turbines of the plurality of single-shaft combined units,
wherein the first overhead crane and the second overhead crane each have a pair of travel rails that are parallel to each other and extend in the array direction, and the girders are respectively supported by the pairs of travel rails so as to be able to travel in the array direction,
wherein the building main body has first support parts that support each of the pair of travel rails of the first overhead crane and second support parts that support each of the pair of travel rails of the second overhead crane,
wherein the first support parts include first outer support parts and first inner support parts that respectively support, of the pair of travel rails of the first overhead crane, one travel rail on a first side that is the side of the gas turbine from the steam turbine in an axial direction in which the axis extends, and the other travel rail on a second side that is opposite from the first side, the second support parts include second inner support parts and second outer support parts that respectively support one travel rail on the first side and the other travel rail on the second side of the pair of travel rails of the second overhead crane, and the first inner support parts and the second inner support parts together constitute integral support parts, and
wherein the first support parts and the second support parts also support the roof.
2. The plant building according to claim 1 , wherein
the generator of the single-shaft combined unit is disposed between the gas turbine and the steam turbine in the axial direction in which the axis extends,
the first overhead crane is disposed on the first side that is the side of the gas turbine from the steam turbine in the axial direction,
the second overhead crane is disposed on the second side that is the side of the steam turbine from the gas turbine in the axial direction, and
the first inner support parts and the second inner support parts are disposed in a region where the generators are located in the axial direction.
3. A combined cycle plant comprising:
the plant building according to claim 1 ;
the plurality of single-shaft combined units;
an intake duct that is provided for each of the plurality of single-shaft combined units and guides air to the gas turbine, and an intake air filter that removes foreign substances contained in air flowing into the intake duct; and
an exhaust heat recovery boiler that is provided for each of the plurality of single-shaft combined units and generates steam with the heat of exhaust gas discharged from the gas turbine.
4. The combined cycle plant according to claim 3 , wherein the intake air filter is disposed on the upper side relative to the gas turbine.
5. The combined cycle plant according to claim 3 , wherein the intake air filter is disposed in an imaginary plane that spreads in the vertical direction so as to include the axis of the single-shaft combined unit provided with the intake air filter.
6. The combined cycle plant according to claim 3 , wherein the intake air filter is disposed on the lower side relative to the gas turbine.
7. The combined cycle plant according to claim 6 , wherein the intake air filter is disposed under the exhaust heat recovery boiler.
8. A combined cycle plant comprising:
the plant building according to claim 2 ;
the plurality of single-shaft combined units;
an intake duct that is provided for each of the plurality of single-shaft combined units and guides air to the gas turbine, and an intake air filter that removes foreign substances contained in air flowing into the intake duct; and
an exhaust heat recovery boiler that is provided for each of the plurality of single-shaft combined units and generates steam with the heat of exhaust gas discharged from the gas turbine, wherein
the intake air filter is disposed above the generator.