JPH0979005A - Thermal power plant - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To make the structure of a turbine building in a thermal power plant compact and increase the strength of the building. Provided is a building 1 for accommodating a power generation facility 2 having a steam turbine 4 or a gas turbine 3 and a generator 5 coaxially connected to an end thereof in one space. A parallel rail type overhead crane 19 is installed in the building 1. Building 1
A high building portion 1a with a high ceiling that surrounds at least the turbines 3 and 4, and a low building portion 1b with a low ceiling that is connected to the high building portion 1a and surrounds the generator 5 portion. The overhead crane 19 is installed only in the high building section 1a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam turbine, a gas turbine, or a thermal power plant using both of them, and more particularly to a thermal power plant having an improved turbine building and its auxiliary equipment.

[0002]

2. Description of the Related Art Generally, a thermal power plant comprises a boiler facility and a power generation facility including a steam turbine and a generator connected to the boiler facility, or a power generation facility including a gas turbine and a generator coupled to the gas turbine. It is configured with. Furthermore, recently, power generation equipment by a combined cycle system using both a steam turbine and a gas turbine has been developed.

In such a thermal power plant, a power generation facility including a turbine and a generator is housed in a building (turbine building). Conventionally, the turbine and the generator are maintained over the entire area of the building. , Has installed a parallel rail type overhead crane for inspection.

For this reason, the building must have a huge space without pillars on the turbine floor in order not to hinder the traveling of the overhead crane, and the columns on the peripheral side of the building have extremely high strength. Need to be set.

In recent years, the capacity of a single machine has been increased in order to effectively utilize the scale merit of a power plant, and along with this, the span of the overhead crane (maintenance between rail centers) for maintenance and inspection of turbines and generators. Distance) tends to increase.

[0006]

As described above, while the span of the overhead crane tends to increase, the ceiling of the entire building is conventionally constructed to be high. From the turbine in the high building to the generator. Since the overhead cranes are designed to travel over the entire area, the building is becoming larger and larger, and securing its strength has become an important issue.

The problem to be solved by the present invention is to reduce the size of the structure of a turbine building in a thermal power plant and to increase the strength of the building.

[0008]

In order to solve the above-mentioned problems, the invention of claim 1 accommodates a power generation facility having a steam turbine and a generator coaxially connected to an end thereof in one space. In a thermal power plant in which a parallel rail type ceiling crane is installed in this building, the building is connected to this high building part with a high ceiling surrounding at least the steam turbine part. And a low building part having a low ceiling surrounding the generator part, and an overhead crane is installed only in the high building part.

According to a second aspect of the present invention, in the thermal power plant according to the first aspect, a plurality of power generation facilities are installed in parallel in the building, and parallel traveling rails of an overhead crane are installed in the high building portion of the building. It is characterized by being installed in parallel with the power generation equipment.

According to a third aspect of the present invention, in the thermal power plant according to the second aspect, a plurality of overhead cranes having parallel traveling rails are provided for each power generation facility.

According to a fourth aspect of the present invention, in the thermal power plant according to the first aspect, one power generation facility or a plurality of power generation facilities arranged in parallel is installed in a building, and parallel traveling rails of an overhead crane are provided in the building. Is installed in a high building part in a direction orthogonal to the axis of the power generation facility.

According to a fifth aspect of the present invention, in addition to the steam turbine according to any one of the first to fourth aspects, a gas turbine connected to the steam turbine by a single shaft, or a generator different from the steam turbine is used. It is characterized in that the individual gas turbines are arranged.

According to a sixth aspect of the present invention, in the thermal power plant according to any of the first to fifth aspects, the generator includes a hydrogen cooler that can be removed upward, and a hoisting device for an overhead crane. Is set so that the hydrogen cooler can travel or traverse to a position where it can be lifted.

According to a seventh aspect of the present invention, in the thermal power plant according to any one of the first to sixth aspects, at least the rail end portion extends to above the generator in the low building portion, and It is characterized by the installation of a monorail type crane capable of hoisting axially drawn parts.

According to an eighth aspect of the present invention, in the thermal power plant according to the seventh aspect, the rail of the monorail crane is attached to the ceiling of the low building part, and one end of the rail is pulled out along the axial center of the generator. And the other end side of the rail is bent from one end side and extends to a position displaced from the axis of the generator.

According to a ninth aspect of the present invention, in the thermal power plant according to the seventh aspect, the monorail is erected between the pillars erected on the floor of the low building portion and the pillars erected on the generator casing. It is characterized by a detachable structure.

According to a tenth aspect of the present invention, in the thermal power plant according to any of the first to ninth aspects, the number of floors of the building is different between the high building portion and the low building portion.

An eleventh aspect of the invention is the thermal power plant according to the tenth aspect, wherein the turbine floor has substantially the same height in the high building portion and the low building portion.

The invention of claim 12 is the thermal power plant according to claim 11, wherein the turbine floor of the low building portion is
An electric room or a control room is provided so as not to interfere with the rotor extraction area of the generator.

According to a thirteenth aspect of the present invention, at least two sets of a power generation facility in which a steam turbine and a generator are uniaxially connected and a power generation facility in which a gas turbine and a generator are uniaxially connected are A thermal power plant having a building that accommodates them in one space while arranging them so that they are located at mutually opposite outer positions on the same axis, and a parallel rail type overhead crane is installed in this building. A high building part with a high ceiling that surrounds at least the steam turbine or gas turbine part of the building, and each power generation unit that is connected to both ends of the high building part in the axial direction of the power generation equipment and is arranged at the opposite outer positions. It is characterized in that it is constituted by a plurality of low building parts having a low ceiling that surrounds a machine part, and an overhead crane is installed only in the high building part.

The invention of claim 14 is a thermal power plant according to any one of claims 1 to 13 in which a rotor of the generator is mounted at the time of installation or extraction, and a trolley capable of traveling on the floor of the building. This bogie is characterized by having wheels whose rolling direction is freely changeable, a jack-up mechanism for moving up and down a rotor to be mounted, and a brake device for stopping the wheels.

According to a fifteenth aspect of the present invention, in the thermal power plant having the gas turbine according to any one of the fifth to fourteenth aspects, the gas turbine intake duct is installed in the gas turbine base stand, and the gas turbine intake is provided. The feature is that the inner surface level of the duct is set below the turbine floor level and above the building base mat level.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a thermal power plant according to the present invention will be described below with reference to the drawings.

1 to 7 show an embodiment of the present invention.

FIG. 1 is a vertical sectional view showing the overall construction of the thermal power plant according to this embodiment, and FIG. 2 is a plan view of the same.

As shown in FIGS. 1 and 2, in the thermal power plant of this embodiment, a plurality of sets (3 sets) of power generation equipment 2 are arranged inside the turbine building 1 in parallel with each other with their axes arranged in parallel. It is stored. Each power generation facility 2 has a configuration in which a gas turbine 3, a steam turbine 4 and a power generator 5 are sequentially arranged and connected by a single shaft.

A gas turbine 3 is provided outside the turbine building 1.
The outlet duct 6, the waste heat recovery boiler 7 connected to the outlet duct 6, the main transformer 9 connected to the generator 5, and the like are installed.

Each generator 5 has a left and right side at two axial locations.
A total of four hydrogen coolers 10a, 10a, 10b,
10b is provided in a state where it can be installed and removed from above, and a collector 11 is provided on the tip side of the generator 5.

The turbine building 1 accommodates the above-mentioned plurality of power generation facilities 2 in one space. The turbine building 1 is roughly classified into a high-power generation facility 2 surrounding a portion of the gas turbine 3 and the steam turbine 4. The structure is made up of a high building portion 1a having a ceiling 12a and a low building portion 1b having a low ceiling 12b which is connected to the high building portion and surrounds the portion of the generator 5.

That is, the turbine building 1 has a tall box-shaped high building portion 1a and a short box-shaped high-rise portion 1a which is continuously provided so as to have a step at the end of the high building portion 1a on which the generator 5 is arranged. It is composed of the low building portion 1b, and a continuous portion of both building portions 1a and 1b is in a state of being fully opened to form one space as a whole.

The high building section 1a includes a plurality of tall columns 13
And the side wall 14 and the roof material 15, and the low building portion 1b shares a tall pillar 13 arranged in a continuous portion of both building portions 1a and 1b, and another low pillar 16, It is constituted by the side wall 17 and the roof material 18.

A parallel rail type overhead crane 19 is installed only on the side of the high building 1a. The overhead crane 19 is mounted on the traveling rails 20 and 21 and a pair of parallel traveling rails 20 and 21 which are installed on the ceiling side of the high building 1a along a direction orthogonal to the axis of the power generation equipment 2. A bridge girder 22 that is driven to run, and a traverse device 23 mounted on the bridge girder 22 and traversing along the axial direction of the power generation facility 2;
The traverse device 23 has a hoisting device 24.

One rail 20 of this overhead crane 19
Are arranged in the vicinity of the side walls 14 of the high building portion 1a that face each other in the axial direction of the power generation equipment 2, and the other rail 21 is arranged at a substantially intermediate position in the axial direction of the casing of the generator 5. As a result, the span of the overhead crane 19 extends from the axially outer end side on the gas turbine 3 side to a substantially intermediate position of the casing of the generator 5, that is, an intermediate position of the hydrogen cooler 10 arranged along the axial direction. It is set over.

Therefore, by the hoisting device 24 of the overhead crane 19, the components of the gas turbine 3, the components of the steam turbine 4, the casing of the generator 5 and the pair of left and right hydrogen coolers 10a, 1 arranged on the turbine side.
0a can be hung and hung.

A monorail 26 dedicated to lifting the hydrogen cooler is provided on the beam 25 at the end of the high building 1a on the generator 5 side. That is, since the span of the above-mentioned overhead crane 19 is only up to approximately the intermediate position in the axial direction of the casing of the generator 5, the hydrogen coolers 10a, 10a on the turbine side can be lifted, but the hydrogen on the generator end side can be lifted. Cooler 1
0b and 10b cannot be lifted.

Therefore, the monorail 26 is provided in the high building portion located above the hydrogen cooler 10b along the direction perpendicular to the axis of the generator 5, and the hoist 27 traveling along the monorail 26 serves the hydrogen cooler 10b. The generator 5 is hoisted and moved to the side of the generator 5, and can be lowered to a loading platform or the like described later for maintenance / inspection or replacement.

Further, in the present embodiment, the monorail type crane 28 for hoisting the components such as the rotor pulled out along the axial direction of the generator 5 can be attached and detached between the low building portion 1b and the generator 5. It can be installed at.

That is, FIGS. 3 and 4 show a monorail type crane 28. The crane 28 is mounted on and detached from the support column 29 standing inside the low building section 1b and the casing 5a of the generator 5. The support 30 is installed as much as possible, the monorail 31 is installed between them, and the traveling device 32 and the hoisting device 33 that travel along the monorail 31 are provided.

The monorail 31 has, for example, one end side extending along the axial direction of the generator 5, the other end side being bent in the middle, and then extending along the axis perpendicular to the generator 5. Thereby, the traveling device 32 and the hoisting device 33
Can travel between the one end side and the other end side of the monorail 31 to convey the rotor or the like of the generator 5 to a position deviated from the axial center of the generator 5 and deliver it to a dolly or the like. It is like this.

Further, in this embodiment, as shown in FIG.
The number of floors of the turbine building 1 is set to be the third floor for both the high building portion 1a and the low building portion 1b, and the level of each floor is substantially the same in both building portions 1a, 1b. And both building sections 1a,
The third floor portion of 1b is the turbine floor surface 37 of the same level.

Although not shown, the number of floors of the turbine building 1 may be different between the high building portion 1a and the low building portion 1b. For example, high building section 1a is on the second floor, low building section 1
By setting b to the third floor, the ceiling height of the high building part 1a can be further reduced.

Further, as shown in FIG. 2, on the turbine floor surface 37 of the low building portion 1b, a plurality of chambers 3 such as an electric room or a control room are arranged so as not to interfere with the rotor extraction area of the generator 5.
8a, 38b, 38c are provided to effectively use the floor space.

Conventionally, such chambers 38a, 38b,
38c was installed within the span of the overhead crane, but the turbine floor 3 which is the third floor of the turbine building 1
By installing it in 7, it is possible to make the high-rise building 1a have a two-story structure, for example. Although a large amount of cable wiring is required in the electric room and the control room, according to the present embodiment, wiring to the electric room and the control room corresponding to each axis of each power generation facility 2 is provided in each room 38a, 38b, 38c. Since they can be assembled, there is also an advantage that cable wiring can be performed easily.

Next, the operation of the above embodiment will be described.

In the present embodiment, a large overhead crane 19 is provided on the side of the high building 1a, and its span is set to extend from a position covering the entire gas turbine 3 side to a position approximately midway in the axial direction of the generator 5. Therefore, by traveling and traversing the overhead crane 19, the components of the gas turbine 3 and the components of the steam turbine 4, which are large components, can be hoisted and transported during maintenance, inspection, and the like. Further, among the parts of the generator 5, the pair of turbine-side hydrogen coolers 10a, 10a that enter the span of the overhead crane 19 can also be transported by the overhead crane 19.

On the other hand, at a position outside the span of the overhead crane 19, the other hydrogen coolers 10b, 10b can be hoisted by a dedicated monorail 26 and hoist 27 and transported to the side of the generator 5.

5 to 7 show a method of handling the hydrogen cooler 10b conveyed by the hoist 27.

First, as shown in FIG. 5, the hook 27a of the hoist 27 is lowered, and the lower end of the hydrogen cooler 10b is placed on the carriage (or roller stand) 34.

Next, as shown in FIG. 6, while the hook 27a is being unloaded, the carriage 34 is moved in one direction by the wire 36 connected to the overhead crane 19 via the pulley 35, thereby tilting the hydrogen cooler 10b. Let

Then, as shown in FIG. 7, the hook 27a is further lowered and the carriage 34 is moved to completely lay down the hydrogen cooler 10b. In this state, the hook 27a can be removed thereafter, and the hydrogen cooler 10b can be transported to a predetermined place for maintenance and inspection.

Similarly, as for the rotor of the generator 5 which is pulled out to the side of the low building portion 1b which the overhead crane 19 does not reach, as shown in FIGS. Supports 29, 30 on the casing of the machine 5
Install another monorail 31 and this monorail 3
1 traveling device 32 and hoisting device 33
With this, it can be transported to a position deviated from the axial direction for maintenance and inspection.

As described above, the main part of the power generation facility 2 can be handled, for example, as a result of transportation, and as a result, the turbine building 1 of the present embodiment has a high building part 1a with a high ceiling in which an overhead crane 19 is installed, By dividing it into a low-building part 1b with a low ceiling, which does not have an overhead crane but can carry some of the parts of the generator 5 by means of a monorail, etc., the overall height of the turbine building 1 is kept constant. Compared with the conventional one, the building volume can be reduced by the space above the low building portion 1b, and the time and effort required for building materials and construction can be eliminated, resulting in a significant compactness and cost reduction.

Moreover, the large overhead crane 19 is installed only on the side of the high building section 1a, so that the span is shortened as compared with the conventional one. Therefore, on the side of the high building section 1a, the weight burden becomes smaller than in the conventional configuration in which the span of the overhead crane 19 is provided over the entire axial direction of the power generation equipment 2, and the structural strength of the building and the strength of the overhead crane are reduced. The reliability can be easily and surely ensured.

In the above embodiment, a plurality of power generating facilities 2 arranged in parallel are installed in the turbine building 1, and the parallel traveling rails 20 and 21 of the overhead crane 19 are arranged in a direction orthogonal to the axis of the power generating facility 2. However, the present invention is not limited to such a configuration. For example, as shown in FIG. 8, a plurality of power generation facilities 2 are installed in parallel, and the parallel traveling rails of the overhead crane 19 are connected to the turbine. You may install in parallel with the power generation equipment 2 in the high building part 1a of the building 1.

Such a construction as shown in FIG. 8 has a structure of the high-rise building portion 1a of the turbine building 1 when the construction of the overhead crane 19 is smaller than the dimension along the axial direction of the power generation equipment 2 in the direction perpendicular to the axis. It is suitable for shortening the span.

Further, in each of the above-described embodiments, the pair of traveling rails 20 and 21 of the overhead crane 19 are provided on the opposite side walls 14 of the high building portion 1a. However, as shown in FIG. It is also possible to install a plurality of sets of overhead cranes 19a, 19b having parallel traveling rails 20a, 20b, 21a, 21b, corresponding to each.

According to the structure shown in FIG. 9, the span can be further shortened by installing a plurality of sets of overhead cranes each having a traveling rail, and the reliability of the structural strength of the overhead crane can be improved. Can be further enhanced.

FIG. 10 is a schematic block diagram of the whole showing another embodiment of the present invention, and FIG. 11 is a plan view of FIG.

In the present embodiment, a plurality of sets (4 sets) of power generation equipment 2 in which the steam turbine 4 and the power generator 5 are uniaxially connected are provided, and two sets of them are arranged on the same axis. As a whole, they are arranged in parallel in two rows. Then, in each row, the steam turbines 4 are adjacent to each other, and the generators 5 are arranged so as to be in mutually opposite outer positions on the same axis.

The turbine building 1 accommodates these power generation facilities 2 in the same space.
However, a high building portion 1a having a high ceiling that surrounds the steam turbine 4 portion and a low ceiling portion that surrounds each generator 5 portion that is connected to both end portions of the high building portion 1a in the axial direction of the power generation facility 2 It is divided into two low building parts 1b and 1b. And
The overhead crane 19 is installed only in the high building part 1a.

As described above, in the embodiment shown in FIGS. 10 and 11, both sides of the turbine building 1 are the low building portions 1b and 1b surrounding the generator 5, and also surround the steam turbine 4 portion. By providing the overhead crane only in the high building section 1a, the effects of downsizing the building structure and improving reliability in strength can be obtained as in the above-described embodiments.

In the embodiment shown in FIGS. 10 and 11, the turbine constituting the power generation facility 2 is replaced by the steam turbine 4.
However, it goes without saying that various modifications are possible, such as a gas turbine, or a combination of a steam turbine and a gas turbine.

FIG. 12 is a sectional view showing an extracted portion of the intake duct of the gas turbine 3 in FIG.

In the embodiment shown in FIG. 12, the gas turbine intake duct 50 is installed in the gas turbine base 51, the inner surface level of the gas turbine intake duct 50 is below the floor level of the first floor, and the turbine building It is set to the level of the basic mat 52 of No. 1 (about 1 to 2 m) or more.

According to this structure, the following effects can be obtained. That is, when the turbine floor level is lowered, the installation space for the gas turbine intake duct 50 becomes narrower accordingly. The gas turbine intake duct 50 ensures the amount of intake air of the gas turbine compressor, but the pressure drop of air during ventilation of a general intake duct has a great influence on the output and performance of the gas turbine ( A pressure drop of 0.01 kg / cm ² reduces the output by about 1% or more).

Therefore, in order to design the intake duct in consideration of the pressure drop, it is necessary to secure an appropriate cross-sectional area and reduce the air flow velocity sufficiently. In a gas turbine basic typhoon type intake duct, it is possible to increase the cross-sectional area by increasing the height and width of the cross-section.

Here, if the width of the cross section is widened, the column span must be widened accordingly, which is not so preferable from the standpoint of the strength of the turbine building. On the other hand, the height is determined by the thickness of the gas turbine base, the turbine floor level, and the intake duct inner surface level.

In this embodiment, the height of the cross section of the intake duct 50 can be secured by lowering the inner surface level of the intake duct 50 to the mat surface. In addition, turbine building 1
It is easier to construct the matte surface as the foundation of the, if the height is as uniform as possible. In this embodiment, the inner surface level of the intake duct is set to the mat surface level or higher, so that the intake duct 50 can be rationally constructed.

FIG. 13 shows the structure of a carriage 60 used when pulling out the generator rotor applied in the present invention.

This trolley 60 has wheels 61 whose rolling directions can be freely changed, a jack-up mechanism 62 which can raise and lower a generator rotor, and a brake device 63 which can arbitrarily stop the rotation of the wheels 61. It has and.

According to the structure of such a trolley 60, the work such as pulling out and moving the generator rotor can be easily performed without using the overhead crane 19.

The monorail type crane described in the above embodiments may be a crane having another structure such as a jib crane.

[0073]

As described in detail above, according to the thermal power plant of the present invention, the building is divided into a high building portion and a low building portion, and an overhead crane is installed only in the high building portion to install a turbine or the like. In addition to being able to transfer the main equipment of the power generation equipment, the low building side can handle the auxiliary equipment with a lightweight crane such as a monorail crane to reduce the volume of the turbine building. It is possible to ensure the reliability of the structural strength, and it is also possible to ensure the reliability of the overhead crane.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a thermal power plant according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a side view showing the configuration of the detachable monorail type crane in the embodiment.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is an explanatory view showing an initial leaning state of the hydrogen cooler takeout action of the generator in the embodiment.

FIG. 6 is an explanatory diagram showing a state in which the hydrogen cooler takeout action of the generator in the embodiment is in the middle of tilting.

FIG. 7 is an explanatory view showing a state where the tilting of the hydrogen cooler takeout action of the generator in the embodiment is completed.

FIG. 8 is a plan view showing another embodiment of the thermal power plant according to the present invention.

FIG. 9 is a plan view showing still another embodiment of a thermal power plant according to the present invention.

FIG. 10 is a side view showing still another embodiment of the present invention.

FIG. 11 is a plan view of FIG. 10;

FIG. 12 is a sectional view showing an embodiment of a gas turbine intake duct according to the present invention.

FIG. 13 is a sectional view showing an embodiment of a bogie used when pulling out a generator rotor according to the present invention.

[Explanation of symbols]

1 Turbine building 1a High building part 1b Low building part 2 Power generation equipment 3 Gas turbine 4 Steam turbine 5 Generator 5a Casing 6 Exit duct 7 Waste heat recovery boiler 9 Main transformer 10a, 10b Hydrogen cooler 11 Collector 12a, 12b Ceiling 13 Pillars 14,17 Side wall 15,18 Roofing material 16 Pillar 19,19a, 19b Overhead crane 20,20a, 20b ,, 21,21a, 21b Traveling rail 22 Bridge girder 23 Traverse device 24 Hoisting device 25 Beam 26 Monorail 27 Hoist 27a Hook 28 Monorail type crane 29 Strut 30 Strut 31 Monorail 32 Traveling device 33 Hoisting device 34 Cart (roller stand) 37 Turbine floor 38a, 38b, 38c Room (electric room, control room) 35 Pulley 36 Wire 50 Gas turbine intake duct 51 Gas Turbine base Foundation 52 Base mat 60 Cart 61 Wheel 62 Jack-up mechanism 63 Brake device

Claims (15)

[Claims] 1. A thermal power generation system in which a building for accommodating a power generation facility having a steam turbine and a generator coaxially connected to its end is provided in one space, and a parallel rail type overhead crane is installed in the building. In the plant, the building is composed of a high building portion with a high ceiling that surrounds at least a steam turbine portion, and a low building portion with a low ceiling that is connected to the high building portion and surrounds a generator portion, and A thermal power plant characterized by installing an overhead crane only in the high building section. 2. The thermal power plant according to claim 1, wherein a plurality of power generating equipments are installed in parallel in a building, and parallel traveling rails of an overhead crane are provided in a high building portion of the building in parallel with the power generating equipments. A thermal power plant characterized by being installed. 3. The thermal power plant according to claim 2, wherein a plurality of sets of overhead cranes having parallel traveling rails are provided for each power generation facility. 4. The thermal power plant according to claim 1, wherein one power generation facility or a plurality of power generation facilities arranged in parallel is installed in a building, and parallel traveling rails of an overhead crane are installed in a high building portion of the building. A thermal power plant, which is installed in a direction orthogonal to the axis of the power generation facility. 5. In addition to the steam turbine according to any one of claims 1 to 4, a gas turbine that is uniaxially connected to the steam turbine, or a gas turbine that has a generator separately from the steam turbine. A thermal power plant characterized by being provided with. 6. The thermal power plant according to any one of claims 1 to 5, wherein the generator is provided with a hydrogen cooler that can be removed upward, and the hoisting device of an overhead crane is equipped with the hydrogen cooler. A thermal power plant characterized by being set to run or traverse to a position where it can be lifted. 7. The thermal power plant according to any one of claims 1 to 6, wherein at least a rail end portion extends to above the generator in the low building portion and is pulled out in the axial direction of the generator. A thermal power plant characterized by the installation of a monorail crane capable of lifting parts. 8. The thermal power plant according to claim 7, wherein the rail of the monorail type crane is attached to the ceiling of the low building part, and one end side of this rail is arranged in the rotor extraction part along the axis of the generator. At the same time, the other end side of the rail is bent from one end side and extends to a position displaced from the axial center of the generator. 9. The thermal power plant according to claim 7, wherein the monorail is a detachable structure erected between a pillar erected on the floor of the low building portion and a pillar erected on the casing of the generator. It is said that the thermal power plant. 10. The thermal power plant according to any one of claims 1 to 9, wherein the number of floors of the building is different between the high building portion and the low building portion. 11. The thermal power plant according to claim 10, wherein the high-rise building portion and the low-rise building portion have substantially the same height. 12. The thermal power plant according to claim 11, wherein an electric room or a control room is provided on the turbine floor surface of the low building portion so as not to interfere with the rotor extraction area of the generator. plant. 13. A generator having at least two sets of a power generation facility in which a steam turbine and a generator are uniaxially connected and a power generation facility in which a gas turbine and a generator are uniaxially connected, wherein the generators have the same axial center. It is a thermal power plant that has a building that accommodates them in one space while arranging them so that they are in mutually opposite outer positions, and a parallel rail type overhead crane is installed in this building, where the building is at least steam. A high building part with a high ceiling that surrounds the turbine or gas turbine part, and a part of each generator that is connected to both ends of the high building part in the axial direction of the power generation equipment and that are arranged at the opposite outer positions. A thermal power plant comprising a plurality of low building parts having a low ceiling, and an overhead crane is installed only in the high building part. 14. The thermal power plant according to any one of claims 1 to 13, comprising a trolley capable of traveling on the floor of a building with a rotor of the generator mounted during installation or extraction. , A wheel whose rolling direction can be changed, and a jack-up mechanism that raises and lowers the rotor to be mounted,
A thermal power plant, comprising: a brake device that stops the wheels. 15. The thermal power plant according to any one of claims 5 to 14, wherein the gas turbine intake duct is installed in the gas turbine foundation stand, and the inner surface level of the gas turbine intake duct is below the turbine floor level. A thermal power plant characterized by being set above the basic mat level of the building.