JPH0444059B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a turbine building attached to a power generation plant such as a nuclear power generation plant, and in particular improves the internal structure in order to effectively utilize the space inside the turbine building. Regarding the turbine building.

[Technical background of the invention and its problems]

Steam turbines, which form the main components of power plants such as nuclear power plants, are shown in Figures 4 to 6.
As shown in the figure, it is installed in a turbine building 1 and includes a high-pressure turbine 2a and a low-pressure turbine 2b. The steam turbine 2 is provided with moisture separators 3 on both sides, which separate moisture from the steam sent from the high-pressure turbine 2a through the steam pipe 11, and supply the separated dry steam to the low-pressure turbine 2b. ing.

On the other hand, the steam turbine 2 is installed above a condenser 4, and the condenser 4 condenses expanded steam exhausted from the steam turbine 2 to form condensate. The condenser 4 is installed on the building foundation 5 of the turbine building 1, and around the condenser 4, equipment constituting the reactor water supply system, a filtration desalination device, etc. are arranged.

Further, the moisture separators 3 provided on both sides of the steam turbine 2 are installed on a moisture separator installation floor 6a that constitutes a part of the turbine installation floor 6, and an upper cover 7 that covers the moisture separator 3 It is suspended and supported from. The turbine installation floor 6 constitutes an operation floor, and a building beam 8 is spanned over the lower part of the installation floor 6 to strengthen it.

By the way, the height of the turbine building 1 is basically determined by the height of the turbine condenser 4. Specifically, the height of the turbine building 1 is the height of the condenser 4 plus the height required for handling operations such as disassembly, inspection, maintenance, and repair of the steam turbine 2. The floor level of the floor 6 is determined by the height of the condenser 4, and the operation chamber 9 above the turbine installation floor 6 is the height of the steam turbine 2.
The height is determined to be necessary for handling operations such as disassembly and repair. The handling work for the steam turbine 2 involves lifting and transporting the turbine parts using an overhead crane 10.
The process is proceeded by temporarily placing it on the turbine installation floor 6.

However, in the conventional turbine building 1, the floor level of the turbine installation floor 6 is determined by the height of the condenser 4, while the steam piping 11 from the high-pressure turbine 2a is arranged to bypass the lower part of the building beam 8. is,
Since the piping structure is connected to the moisture separator 3,
Wasted dead space is formed above and below the turbine installation floor 6, and the turbine building 1 is limited.
There was not always sufficient consideration given to the effective use of internal space.

In addition, since the upper cover 7 of the moisture separator 3 covers and protects the moisture separator 3 from above, it is very high from the turbine installation floor 6 and requires sufficient space in the operation chamber 9. was difficult. For this reason, the working environment during handling operations such as disassembling and repairing the steam turbine 2 is poor.
Inspection, maintenance, and repair work could not be carried out efficiently and in a short time.

In consideration of this point, in order to improve and efficiently disassemble, inspect, maintain, and repair the steam turbine 2, a method is being considered in which the moisture separator 3 is installed below the turbine installation floor. However, with this installation method, it is necessary to install the moisture separator avoiding the feed water heater loading/unloading space 12, which increases the floor area of the turbine building 1.
The volume of increases. As a result, the working environment for disassembling, inspecting, maintaining, repairing, etc. of the steam turbine 2 is improved, but there are problems such as relatively high construction costs.

[Purpose of the invention]

The present invention has been made in consideration of the above-mentioned circumstances, and it makes effective use of the dead space inside the turbine building to arrange steam piping, expand the space of the operation chamber, and improve the efficiency of steam turbine disassembly and repair. The purpose is to provide an economically superior turbine building with improved workability.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention houses a steam turbine with a high-pressure turbine and a low-pressure turbine, and a moisture separator, respectively, and the moisture separator is connected to a moisture separator forming part of an operation floor. In the turbine building installed on both sides of the steam turbine on the floor where the separator is installed, a steam pipe that guides the steam from the high-pressure turbine to the moisture weapon is installed to pass through the floor where the moisture separator is installed and the moisture separator. The system utilizes the dead space between the moisture separator and the steam turbine on the moisture separator installation floor, and the space between the building beams below the moisture separator installation floor, which reinforces this installation floor.

The present invention makes it possible to reduce the piping space by arranging the steam piping connected from the high-pressure turbine to the moisture separator by utilizing the dead space inside the turbine building. It is possible to use space effectively and improve workability in handling operations such as disassembling and inspecting steam turbines. In particular, by reducing the piping space, the floor level of the moisture separator installation floor can be lowered, which lowers the installation level of the moisture separator top cover, saving space in the operation chamber. The new system has been expanded to improve the work environment for steam turbine disassembly, inspection, maintenance, and repair work, and to improve work efficiency.

[Embodiments of the invention]

Hereinafter, one embodiment of a turbine building according to the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 shows a turbine building 15 attached to a reactor building of a nuclear power plant, and this turbine building 15 is constructed on a concrete building foundation 16. A turbine condenser 17 is installed on the building foundation 16, and a steam turbine 18 is installed above the condenser 17. An operation floor 19 is formed on both sides of the steam turbine 18, and a pair of moisture separators 20 are installed on this operation floor 19. The moisture separator 20 is suspended and supported from a moisture separator upper cover 21, and the upper cover 21 covers and protects the moisture separator 20 from above. A part of the operation floor 19 surrounded by the moisture separator upper cover 21 constitutes a moisture separator installation floor 19a.

On the other hand, the lower part of the operation floor 19 is divided by columns and partition walls of the turbine building 15, and a plurality of equipment rooms 23 are defined. Components such as a container 24 and a water supply pump (not shown) and a filtration desalination device are installed. The feedwater heater 24 and the like are taken in and out of the turbine building 15 via the feedwater heater loading/unloading space 25 .

In addition, building beams 26 are spanned at a predetermined interval below the moisture separator installation floor 19a of the operation floor 19, and the moisture separator installation floor 19a
9a is strengthened. The upper part of the operation floor 19 is defined as an operation chamber 27.
is formed as a work room for disassembling, inspecting, maintaining, and repairing the steam turbine 18 and the like. Handling operations such as disassembly and inspection of the steam turbine 18 are carried out by a movable overhead crane 28 that is hung over the top of the turbine building 15. Furthermore, a hatch 29 for loading and unloading equipment is installed on the operation floor 19.
The hatch 29 is formed as shown in the figure, and each equipment room 23 below the operation floor 19 is
Necessary equipment will be transported in and out. Further, the turbine building 15 is provided with a plurality of air conditioners 30,
This air conditioner 30 adjusts and controls the inside of the turbine building 15 to an appropriate atmospheric condition.

By the way, the steam turbine 18 housed in the turbine building 15 includes a high-pressure turbine 18a and a plurality of low-pressure turbines 18b, and these high-pressure turbines 18a and low-pressure turbines 18b are arranged so as to have a common axis, The steam turbine 18 is operated by the steam from the nuclear reactor that is not
It is adapted to drive a turbine generator 31. At that time, the high pressure turbine 18a is connected to the steam pipe 32
The steam from the high-pressure turbine 18a is separated by the moisture separator 20, and the separated dry steam is sent from the moisture separator 20 to the steam outlet piping 33. are supplied to each low pressure turbine 18b through the respective low pressure turbines 18b.

In addition, steam piping 32 from the high pressure turbine 18a
As shown in FIGS. 2 and 3, they are arranged by effectively utilizing the dead space on the operation floor 19 and the space between the building beams 26,
Piping space can be reduced compared to turbine buildings with conventional structures. Specifically, the steam pipe 32 exiting the high-pressure turbine 18a from the lower part of the operation floor 19 is guided through the space between the building beams, and then passes through the building beam 26 before reaching the moisture separator 20.
The moisture separator 20 is then routed to near the entrance of the moisture separator 20 using the dead space on the operation floor 19. Since the moisture separator 20 is installed to introduce steam from below, the steam pipe 32 is lowered to the bottom of the operation floor 19 near the entrance of the moisture separator 20, and is connected to the operation floor 19. After being guided between the building beams 26, it rises again just below the moisture separator 20 and is connected to the lower part of the moisture separator 20. Therefore,
Unlike conventional turbine buildings, there is no need to detour the steam piping below the building beam, and the piping space can be reduced accordingly.

Furthermore, since the installation level of the operation floor 19 formed in the turbine building 15 can reduce the piping space, the installation level of the operation floor 19 formed in the turbine building 15 is correspondingly higher than that of the conventional turbine installation floor (operation floor). It can be lowered downward. Therefore, the installation level of the moisture separator upper cover 21 is lowered, and the space of the operation chamber 27 can be expanded accordingly. Therefore, the work space required for handling operations such as disassembly, inspection, maintenance, and repair of the steam turbine 18 etc. can be increased without changing the dimensions of the turbine building 15, improving the working environment and The handling efficiency of the turbine 18 is improved.

Incidentally, the installation level of the operation floor 19 is determined by the installation level of the steam turbine 18, which is determined by the height of the condenser 17, and the installation level of the feed water heater 24, etc., arranged above the condenser 17. The setting is made taking into account the installation space for the feed water heater 24, the loading/unloading space 25 for loading and unloading the feed water heater 24, and the piping space for the steam piping 32 provided above the feed water heater 24. Since it is formed by effectively utilizing the space between 26 and the dead space on the operation floor 19, it can be made smaller and the installation level of the operation floor 19 can be lowered. By lowering the installation level of the operation floor 19, the equipment room 23 below the floor can be reduced, resulting in an economical turbine building 15.

At that time, by arranging the steam piping 32 from the high-pressure turbine on the moisture separator installation floor 19a, piping work can be performed on the installation floor 19a, improving workability and maintainability of piping work. can be done.

In one embodiment of the present invention, a turbine building attached to a nuclear power generation plant has been described, but this turbine building can also be applied to a power generation plant using a steam generator such as a boiler.
Additionally, if the steam piping can be connected to the side of the moisture separator, the steam piping will be lowered below the operation floor on the moisture separator inlet side, eliminating the need to run it between the building beams. It can be connected directly to the side of the moisture separator using dead space on the operating floor. Additionally, the moisture separator may be a moisture separator and reheater that moisture separates and reheats the steam from the high pressure turbine.

〔Effect of the invention〕

As described above, in the turbine building according to the present invention, the steam piping that guides steam from the high-pressure turbine to the moisture separator passes through the moisture separator installation floor,
Moreover, it is installed by utilizing the dead space between the moisture separator and the steam turbine on the moisture separator installation floor and the space between the building beams under the moisture separator installation floor that reinforces this installation floor. , the dead space inside the turbine building can be used effectively, and the steam piping does not need to be arranged in a large detour under the building beam, so the floor where the moisture separator is installed and, ultimately, the operation The floor can be lowered downwards, which also allows the installation level of the moisture separator top cover to be lowered. Therefore, the operation chamber formed above the operation floor can be expanded without changing the overall volume of the turbine building, improving the working environment and making it easier to disassemble, inspect, maintain and maintain the steam turbine. Handling workability such as repair work is improved, and the maintainability of the steam turbine can be improved.

Further, by lowering the operation floor, the physical amount of columns, partition walls, etc. in the turbine building can be reduced, construction costs can be reduced, and economic efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a turbine building according to the present invention, FIG. 2 is a plan view showing the arrangement of steam piping on the operation floor formed in the turbine building, and FIG. A diagram showing the arrangement of steam piping below the operation floor, Figure 4 is a vertical cross-sectional view showing a conventional turbine building, and Figure 5 is a vertical cross-sectional view of a conventional turbine building.
FIG. 6 is a plan view of the operation floor formed in the turbine building shown in the figure, and is a diagram showing an example of the arrangement of steam piping below the operation floor. 1... Turbine building, 16... Building foundation, 17
...Condenser, 18...Steam turbine, 18a...
High pressure turbine, 18b...Low pressure turbine, 19...
...Operation floor, 19a...Moisture separator installation floor, 20...Moisture separator, 21...Top cover, 26...Building beam, 27...Operation chamber, 28...Overhead crane, 32 ...Steam piping.

Claims (1)

[Scope of Claims] 1. A steam turbine including a high-pressure turbine and a low-pressure turbine and a moisture separator are housed, respectively, and the moisture separator is installed on a moisture separator installation floor that constitutes a part of the operation floor. In the turbine building installed on both sides of the steam turbine, the steam piping that guides the steam from the high-pressure turbine to the moisture weapon is passed through the moisture separator installation floor and is installed on the moisture separator installation floor. A turbine building characterized in that the turbine building is installed by utilizing a dead space between a moisture separator and a steam turbine and a space between building beams under a moisture separator installation floor that reinforces this installation floor. 2. A patent claim in which the moisture separator installation floor constitutes a part of the operation floor, and the installation level of this operation floor is lowered below the turbine installation level to expand the space of the operation chamber. The turbine building according to scope 1. 3. The turbine building according to claim 1, wherein the moisture separator is a moisture separation reheater. 4 Steam piping from the high-pressure turbine is guided into the space between the building beams on the moisture separator installation floor, and then raised above the moisture separator installation floor before reaching the moisture separator. It is routed onto the installation floor, lowered near the entrance of the moisture separator, passes through the space between the building beams, rises again just below the moisture separator, and is connected to the lower part of the moisture separator. A turbine building according to claim 1.