MOISTURE SEPARATION HEATER MODULE AND METHOD FOR INSTALLING MOISTURE SEPARATION HEATER

Abstract

This moisture separation heater module comprises: a moisture separation heater including a cylindrical body which extends so as to have a longitudinal axis; and an installation structure for supporting the moisture separation heater. The installation structure comprises: a frame; and a support mechanism fixed to an upper part of the frame and having a suspension member. The suspension member suspends and supports the moisture separation heater at at least two different positions in a direction along the longitudinal axis so that the longitudinal axis extends along the horizontal direction.

Description

TECHNICAL FIELD

The present disclosure relates to a moisture separation heater module and a method for installing a moisture separation heater.

The present application claims priority based on Japanese Patent Application No. 2023-112498 filed in Japan on Jul. 7, 2023, the contents of which are incorporated herein by reference.

BACKGROUND ART

In a nuclear power plant, the moisture is removed from the wet steam discharged from the high-pressure turbine in the moisture separation heater, and the saturated steam from which the moisture is removed is reheated by the main steam and the extraction steam from the high-pressure turbine, and is supplied to the low-pressure turbine as high-temperature steam. In this manner, the thermal efficiency of the entire plant is improved, and the erosion of the low-pressure turbine is suppressed. As described in PTL 1, the moisture separation heater is installed on a beam of a building, for example, on an operation floor of a turbine building or a lower floor thereof.

CITATION LIST

Patent Literature

[PTL 1] Japanese Unexamined Patent Application Publication No. 2007-139460

SUMMARY OF INVENTION

Technical Problem

However, in order to install the moisture separation heater on the beam of the building, there is a problem in that it is difficult to carry in and install the moisture separation heater. In addition, there is a problem in that a routing and a support structure that consider thermal elongation of a pipe connecting the turbine and the moisture separation heater and thermal deformation of a body of the moisture separation heater are required, and this problem is particularly remarkable in a case where the moisture separation heater is provided in the small module reactor.

In view of the above circumstances, an object of at least one embodiment of the present disclosure is to provide a moisture separation heater module and a method for installing a moisture separation heater, which make it easy to install a moisture separation heater.

Solution to Problem

In order to achieve the above object, a moisture separation heater module according to the present disclosure includes a moisture separation heater that includes a cylindrical body extending to have a longitudinal axis, and an installation structure that supports the moisture separation heater, in which the installation structure includes a frame, and a support mechanism that is fixed to an upper portion of the frame and includes a suspension member, and the suspension member suspends and supports the moisture separation heater at at least two different positions in a direction along the longitudinal axis such that the longitudinal axis extends along a horizontal direction.

Advantageous Effects of Invention

According to the moisture separation heater module of the present disclosure, the moisture separation heater can be installed at the installation location by assembling the moisture separation heater module in advance and carrying in and installing the moisture separation heater module at the installation location or by assembling the moisture separation heater module at the installation location. Therefore, the moisture separation heater can be easily installed.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic configuration diagram of a power generation plant including a moisture separation heater module according to an embodiment of the present disclosure.

FIG. 2 is a schematic configuration diagram of the moisture separation heater module according to the embodiment of the present disclosure.

FIG. 3 is a diagram showing an angle formed by a longitudinal axis L of a body of the moisture separation heater in the moisture separation heater module according to the embodiment of the present disclosure with respect to a horizontal direction.

FIG. 4 is a schematic configuration diagram of the moisture separation heater module according to the embodiment of the present disclosure.

DESCRIPTION OF EMBODIMENTS

Hereinafter, a moisture separation heater module according to an embodiment of the present disclosure will be described with reference to the drawings. The embodiments which will be described below represent aspects of the present disclosure and do not limit the disclosure, and any change can be made within the scope of the technical idea of the present disclosure.

Configuration of Moisture Separation Heater Module According to Embodiment of Present Disclosure

As shown in FIG. 1, a power generation plant 1 is provided with a high-pressure turbine 2, a low-pressure turbine 3, a moisture separation heater 4 that removes moisture from wet steam discharged from the high-pressure turbine 2 and reheats saturated steam from which the moisture is removed, a steam generation device 5 (not limited, but for example, a steam generator) that generates steam used in the high-pressure turbine 2 and the moisture separation heater 4, and a condenser 7 that condenses the steam discharged from the low-pressure turbine 3.

The moisture separation heater 4 is configured to include a moisture separation unit 4a that removes the moisture from the wet steam, and a reheating unit 4b that reheats the saturated steam from which the moisture is removed in the moisture separation unit 4a.

As shown in FIG. 2, the moisture separation heater 4 is installed as a moisture separation heater module 10 supported by an installation structure 11. That is, the moisture separation heater module 10 includes the moisture separation heater 4 and the installation structure 11 that supports the moisture separation heater 4. The installation structure 11 includes a frame 12 placed at an installation location and a support mechanism 13 fixed to an upper portion of the frame 12. The configuration of the frame 12 and the support mechanism 13 is not particularly limited, but the frame 12 and the support mechanism 13 may be configured by assembling a plurality of pieces of L-shaped steel. In particular, since the frame 12 is placed on the floor of the installation location, there is a possibility that the area of the floor on which the moisture separation heater module 10 is placed is small depending on the installation location. For this reason, it is preferable that the frame 12 is configured by assembling an elongated member such as the L-shaped steel, and the frame 12 is placed on the floor by the lower end portions of a plurality of elongated members extending in the vertical direction abutting against the floor. A configuration in which a wall-like member is not provided in a portion other than the elongated member and the portion other than the elongated member is not provided with anything, that is, a configuration in which the portion other than the elongated member is an opening is preferable. With such a configuration, the inside of the frame 12 and the support mechanism 13 can be seen through the opening formed by being surrounded by the elongated members, and access to the inside from the outside is possible through the opening. In addition, the elongated member is not limited to the L-shaped steel, and may be a rod-shaped member having any cross-sectional shape in the length direction.

The moisture separation heater 4 includes a cylindrical body 4c that extends to have a longitudinal axis L. The moisture separation unit 4a (refer to FIG. 1) and the reheating unit 4b (refer to FIG. 1) described above are accommodated in the body 4c. The moisture separation heater 4 is supported by the support mechanism 13 such that the longitudinal axis L extends along the horizontal direction. The expression “the longitudinal axis L extends along the horizontal direction” does not only mean that the longitudinal axis L completely faces the horizontal direction, and as shown in FIG. 3, the longitudinal axis L may form an angle θ with respect to the horizontal direction. Although it is preferable that the angle θ is as small as possible, the angle θ may be less than 90°, that is, may be an angle at which the longitudinal axis L does not face the vertical direction, and is preferably 60° or less, more preferably 45° or less, still more preferably 30° or less, and most preferably 10° or less.

As shown in FIGS. 2 and 4, the support mechanism 13 includes a suspension member 14 that suspends and supports the moisture separation heater 4. The suspension member 14 has a first member 14a and a second member 14b that suspend and support the moisture separation heater 4 at two different positions in a direction along the longitudinal axis L. Each of the first member 14a and the second member 14b includes a support member 15 that supports the body 4c of the moisture separation heater 4 from below, and two hanging members 16 and 16 each of which has one end fixed to the support mechanism 13 and the other end fixed to the support member 15. The configuration of the support member 15 is not particularly limited, and for example, may be a band-shaped member such as a band or a plate-shaped member in which a recess corresponding to the outer peripheral shape of the body 4c is formed in the upper edge portion. In FIG. 2, the suspension member 14 is composed of two members, the first member 14a and the second member 14b. However, the suspension member 14 is not limited to two members, and may be composed of three or more members as long as at least two positions in the direction along the longitudinal axis are different from each other. In such a configuration, when the lengths of the hanging members 16 of the first member 14a and the second member 14b are different from each other, the moisture separation heater 4 can be suspended and supported in a state where the longitudinal axis L is inclined with respect to the horizontal direction (0°<θ<90°).

The moisture separation heater 4 includes a moisture separation drain tank 17 that stores the moisture drain mechanically separated from the wet steam in the moisture separation unit 4a (refer to FIG. 1) in the body 4c. The installation location of the moisture separation drain tank 17 is not particularly limited, but the moisture separation drain tank 17 may be installed to be fixed to the body 4c. In a case where the moisture separation drain tank 17 is fixed to the body 4c, although not limited, it is preferable that the moisture separation drain tank 17 is fixed to the body 4c at a lowest position of the body 4c in the vertical direction. In this manner, the moisture drain can be efficiently collected in the moisture separation drain tank 17.

Since the moisture separation heater 4 is suspended and supported by the support mechanism 13 fixed to the upper portion of the frame 12, the moisture separation drain tank 17 fixed to the body 4c of the moisture separation heater 4 has a certain height from the floor surface of the location where the moisture separation heater module 10 is installed. Accordingly, since the moisture drain in the moisture separation drain tank 17 can supply water through the pipe 17a by the water head pressure, it is possible to not provide the drain pump for supplying the moisture drain in the moisture separation drain tank 17 with water in the pipe 17a.

The moisture separation heater 4 includes, as other related devices, a moisture separation heater drain tank 18 that stores the drain in which the heating steam that has been heat-exchanged with the saturated steam after the moisture is removed is condensed in the reheating unit 4b (refer to FIG. 1) in the body 4c. The installation location of the moisture separation heater drain tank 18 is not particularly limited, but the moisture separation heater drain tank 18 may be provided in the installation structure 11, preferably in the frame 12. With this configuration, since the moisture separation heater drain tank 18 is also provided in the moisture separation heater module 10, not only the moisture separation heater 4 but also the related devices can be easily installed. The drain in the moisture separation heater drain tank 18 can supply water to any location from the moisture separation heater drain tank 18 through the pipe 18a.

The moisture separation heater 4 may have an inlet 4d for allowing the wet steam to flow into the moisture separation heater 4 at one end portion 4c1 in the direction along the longitudinal axis L. According to this configuration, since the pipe 19 through which the wet steam flowing into the moisture separation heater 4 circulates can be prevented from being present below the moisture separation heater 4, the frame 12 of the installation structure 11 can be designed to be compact. Although such an action and effect cannot be obtained, the inlet 4d may be provided at the lowest position or the highest position of the body 4c in the vertical direction.

Since the moisture separation heater 4 is suspended and supported by the support mechanism 13, the moisture separation heater 4 may shake when an earthquake occurs, and there is a possibility that the hanging member 16 may be damaged and the moisture separation heater 4 may fall. For this reason, in a country where earthquakes frequently occur, such as Japan, it is preferable to provide a damper that suppresses shaking of the moisture separation heater 4.

Method for Installing Moisture Separation Heater According to Embodiment of Present Disclosure

Next, a method for installing the moisture separation heater 4 will be described. The moisture separation heater module 10 is assembled at a location different from the location where the moisture separation heater 4 is installed. In a case where the moisture separation heater drain tank 18 is provided in the installation structure 11, the moisture separation heater drain tank 18 is provided in the installation structure 11 when the moisture separation heater module 10 is assembled. Next, the moisture separation heater module 10 is placed at the installation location using a crane or the like, and the pipe of the power generation plant 1 is connected to the moisture separation heater 4, so that the moisture separation heater 4 is installed.

As another form of the method for installing the moisture separation heater 4, a part of the installation structure 11, that is, the frame 12 is assembled at the installation location. In a case where the moisture separation heater drain tank 18 is provided in the frame 12, the moisture separation heater drain tank 18 is provided in the frame 12 after the frame 12 is assembled. Next, the support mechanism 13 with the moisture separation heater 4 suspended and supported is prepared at a location different from the location where the moisture separation heater 4 is installed, and the support mechanism 13 with the moisture separation heater 4 suspended and supported is placed on the upper portion of the frame 12 using a crane or the like, and the support mechanism 13 is fixed to the frame 12. Accordingly, since the moisture separation heater module 10 is configured at the installation location, the moisture separation heater 4 is installed at the installation location.

In this way, the moisture separation heater module 10 is assembled in advance and the moisture separation heater module 10 is carried in and installed at the installation location, or the moisture separation heater module 10 is assembled at the installation location. Therefore, since the moisture separation heater 4 can be installed at the installation location, the moisture separation heater 4 can be easily installed.

For example, contents described in each of the above-described embodiments are understood as follows.

[1] A moisture separation heater module according to one aspect is a moisture separation heater module (10) including:

• • a moisture separation heater (4) that includes a cylindrical body (4c) extending to have a longitudinal axis (L); and
  • an installation structure (11) that supports the moisture separation heater (4), in which
  • the installation structure (11) includes
    • a frame (12), and
    • a support mechanism (13) that is fixed to an upper portion of the frame (12) and includes a suspension member (14), and
  • the suspension member (14) suspends and supports the moisture separation heater (4) at at least two different positions in a direction along the longitudinal axis (L) such that the longitudinal axis (L) extends along a horizontal direction.

According to the moisture separation heater module of the present disclosure, the moisture separation heater can be installed at the installation location by assembling the moisture separation heater module in advance and carrying in and installing the moisture separation heater module at the installation location or by assembling the moisture separation heater module at the installation location. Therefore, the moisture separation heater can be easily installed.

[2] The moisture separation heater module according to another aspect is the moisture separation heater module according to [1], in which

• • the moisture separation heater (4) includes an inlet (4d) for allowing wet steam to flow into the moisture separation heater (4) at one end portion (4c1) in the direction along the longitudinal axis (L).

According to such a configuration, since the pipe through which the wet steam flowing into the moisture separation heater circulates can be prevented from being present below the moisture separation heater, the frame of the installation structure can be designed to be compact.

[3] The moisture separation heater module according to still another aspect is the moisture separation heater module according to [1] or [2], in which

• • a moisture separation drain tank (17), which stores a moisture drain mechanically separated from wet steam inside the body (4c), is fixed to the body (4c).

According to such a configuration, since the moisture separation heater is suspended and supported by the support mechanism fixed to the upper portion of the frame, the moisture separation drain tank fixed to the body of the moisture separation heater has a certain height from the floor surface of the location where the moisture separation heater module is installed. Accordingly, since the moisture drain in the moisture separation drain tank can supply water by the water head pressure, it is possible to not provide the drain pump for supplying the moisture drain in the moisture separation drain tank with water.

[4] The moisture separation heater module according to still another aspect is the moisture separation heater module according to any one of [1] to [3], in which

• • a moisture separation heater drain tank (18), which stores a drain generated by condensation of heating steam inside the body (4c), is fixed to the frame (12).

According to such a configuration, since the moisture separation heater drain tank is also provided in the moisture separation heater module, not only the moisture separation heater but also the related devices can be easily installed.

[5] A method for installing a moisture separation heater according to one aspect includes

• • a step of preparing the moisture separation heater module (10) according to any one of [1] to [4], and
  • a step of installing the moisture separation heater module (10).

According to the method for installing the moisture separation heater of the present disclosure, the moisture separation heater can be installed at the installation location by assembling the moisture separation heater module in advance and carrying in and installing the moisture separation heater module at the installation location. Therefore, the moisture separation heater can be easily installed.

[6] A method for installing a moisture separation heater according to one aspect includes

• • configuring the moisture separation heater module (10) according to any one of [1] to [4] by
  • a step of installing the frame (12), and
  • a step of fixing the support mechanism (13), which suspends and supports the moisture separation heater (4), on the frame (12).

According to the method for installing the moisture separation heater of the present disclosure, the moisture separation heater can be installed at the installation location by assembling the moisture separation heater module at the installation location. Therefore, the moisture separation heater can be easily installed.

[7] A method for installing a moisture separation heater according to one aspect includes

• • configuring the moisture separation heater module (10) according to [4] by
  • a step of installing the frame (12),
  • a step of fixing the moisture separation heater drain tank (18) to the frame (12), and
  • a step of fixing the support mechanism (13), which suspends and supports the moisture separation heater (4), to the frame (12) after fixing the moisture separation heater drain tank (18) to the frame (12).

According to the method for installing the moisture separation heater of the present disclosure, not only the moisture separation heater but also the related devices can be easily installed.

REFERENCE SIGNS LIST

• • 4: moisture separation heater
  • 4c: body
  • 4c1: (one) end portion (of body)
  • 4d: inlet
  • 10: moisture separation heater module
  • 11: installation structure
  • 12: frame
  • 13: support mechanism
  • 14: suspension member
  • 17: moisture separation drain tank
  • 18: moisture separation heater drain tank
  • L: longitudinal axis

Claims

1. A moisture separation heater module comprising:

a moisture separation heater that includes a cylindrical body extending to have a longitudinal axis; and

an installation structure that supports the moisture separation heater, wherein

the installation structure includes a frame, and a support mechanism that is fixed to an upper portion of the frame and includes a suspension member, and

the suspension member suspends and supports the moisture separation heater at at least two different positions in a direction along the longitudinal axis such that the longitudinal axis extends along a horizontal direction.

2. The moisture separation heater module according to claim 1, wherein

the moisture separation heater includes an inlet for allowing wet steam to flow into the moisture separation heater at one end portion in the direction along the longitudinal axis.

3. The moisture separation heater module according to claim 1, wherein

a moisture separation drain tank, which stores a moisture drain mechanically separated from wet steam inside the body, is fixed to the body.

4. The moisture separation heater module according to claim 1, wherein

a moisture separation heater drain tank, which stores a drain generated by condensation of heating steam inside the body, is fixed to the frame.

5. A method for installing a moisture separation heater, the method comprising:

a step of preparing the moisture separation heater module according to claim 1; and

a step of installing the moisture separation heater module.

6. A method for installing a moisture separation heater, the method comprising:

configuring the moisture separation heater module according to claim 1 by

a step of installing the frame; and

a step of fixing the support mechanism, which suspends and supports the moisture separation heater, on the frame.

7. A method for installing a moisture separation heater, the method comprising:

configuring the moisture separation heater module according to claim 4 by

a step of installing the frame;

a step of fixing the moisture separation heater drain tank to the frame; and

a step of fixing the support mechanism, which suspends and supports the moisture separation heater, to the frame after fixing the moisture separation heater drain tank to the frame.