JP2003161584A - Condenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a condenser that enables shell parts dividedly and separately fabricated in a factory to be assembled on site more easily and in a short term of work. <P>SOLUTION: The condenser is so designed that in a shell 1 comprising an upper shell 2 and a lower shell 3, the lower shell 3 is divided in two, a first lower shell 17 and a second lower shell 18 divided in two are separately prefabricated, and the separately fabricated first lower shell 17 and second lower shell 18 are connected by welding on site. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser applied to a power plant, and a condenser suitable for assembling and completing a body portion to be divided and manufactured separately at a factory or a site (local power station). Regarding water appliances.

[0002]

2. Description of the Related Art For example, a condenser applied to a thermal power plant or a nuclear power plant is used as a large heat exchanger having a weight of over 400 tons and a height of over 9 m.

This condenser condenses turbine exhaust gas that has finished expansion work in a steam turbine into condensed water, temporarily stores the condensed water, and then supplies it to a steam generator such as a boiler or a nuclear reactor as feed water. It is like this.

A condenser having such a function accommodates tens of thousands of heat transfer tubes arranged in an egg-shaped or bell-shaped shape in a body and allows cooling water such as seawater to flow in the tube. The turbine exhaust is made to flow outside, and the turbine exhaust is condensed during heat exchange. A group of heat transfer tubes arranged in an egg shape or a bell shape is referred to as a tube bundle below.

Further, the condenser is provided with a hot well (condensate reservoir) for temporarily storing condensed water generated during heat exchange of the turbine exhaust, on the downstream side of the tube bundle in the fuselage and meandering the accumulated condensed water. It is equipped with a flow path wall that allows it to flow.

In the condenser having such a structure, in order to process a large amount of turbine exhaust of several hundred tons, the tube bundle is supported by a large number of changing plates, and the body is provided with a large number of reinforcing columns and stays, so that the turbine exhaust is Sufficient strength guarantee against jet force and earthquake.

[0007]

The power generation plants of recent years tend to have higher output, and the capacity of condensers is also increasing accordingly.

[0008] Conventionally, when the capacity of a condenser becomes large, the capacity of factory facilities such as an automatic tube insertion device for inserting a heat transfer tube into a support plate in the body and an overhead crane when it is manufactured in the factory. Since it greatly exceeds the limit, and there is a weight limit when transporting the site, the division method was adopted.

According to this division method, when the body is manufactured in a manufacturing factory, the body is divided into, for example, an upper body portion and a lower body portion, which are separately manufactured. The upper body portion and the lower body portion are separately manufactured. The parts and parts are assembled at the site to integrate the body.

However, if the condenser further increases in capacity, if the body was divided into two parts and assembled at the site as in the conventional case, it would exceed the capacity of the facility in the factory, and At the time of assembling, the scaffolding assembly is more expensive, and there is a danger in the work, and it is becoming a limit in assembling the body.

[0011] Therefore, in the condenser which tends to have a large capacity, there is a demand for a new improvement in which the fuselage can be manufactured by the facility in the factory and can be safely assembled and assembled at the time of assembling at the site.

The present invention has been made in consideration of such a situation, and the condensed water which makes it possible to assemble the body parts which are divided and separately manufactured in the factory at the site to facilitate the assembly in a short period of time. The purpose is to provide a container.

[0013]

The condenser according to the present invention comprises:
To achieve the above-mentioned object, in a condenser in which a lower body is connected to an upper body to form a body, the lower body includes a first lower body and a second lower body. The first lower body and the second lower body, which are divided into two, are separately prepared in advance, and the first lower body and the second lower body, which are separately prepared in advance, are connected to each other. It is what makes me.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has the first lower body and the second lower body housed in the lower body as described in claim 2. The beam is divided based on the beam provided at the lower end of the tube bundle forming the heat exchange section.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has the first lower body and the second lower body as described in claim 2 and claim 3. Is to connect the reinforcing columns by welding through connecting means.

Further, in the condenser according to the present invention, in order to achieve the above object, the connecting means is a buckling as described in claim 2 and claim 4. It is characterized by.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention has the second lower body, as described in claim 2, and the second lower body, which is reinforced for vibration resistance. It is equipped with a sleeve.

Further, in order to achieve the above-mentioned object, the condenser according to the present invention is, as described in claim 2, as described in claim 6, wherein the first lower body has a heat exchange part. Supporting the tube bundle forming the above and accommodating support plates arranged in rows.

In order to achieve the above-mentioned object, the condenser according to the present invention is, as described in claim 2, as described in claim 7, the second lower body is a top plate. It is provided with a hot well that is closed and forms a meandering flow path with a partition plate.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a condenser according to the present invention will be described below with reference to the drawings and the reference numerals attached to the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of a condenser according to the present invention.

Prior to the description of the condenser according to this embodiment,
First, the overall configuration of the condenser will be schematically described.

The condenser has a structure in which a body 1 is connected by connecting an upper body 2 and a lower body 3 which are divided by a line segment B-B.

The upper body 2 is made of a steel plate, and has a connecting body 4 having an opening of, for example, a quadrilateral shape for connecting an upstream side to a steam turbine (not shown), and a pressure of turbine exhaust exhausted from the steam turbine. In order to recover, the expansion body 5 which forms the expansion flow path toward the downstream side is provided.

On the other hand, the lower body 3 is composed of steel side plates 6a,
6b and the end plates 7a, 7b, and is formed in, for example, a rectangular parallelepiped shape, and the heat exchange section 8 and the heat exchange section 8 are formed in the body.
The hot well 9 temporarily stores the condensed water generated during heat exchange of the turbine exhaust. This hotwell 9
Covers the top with a ceiling plate 9a, and forms a flow path 9c for meandering condensate with a partition plate 9b.

The heat exchange section 8 is composed of heat transfer tubes 10a and 10b extending along the side plates 6a and 6b, for example, a tube bundle 11 arranged in a bell shape, and a support plate 12 for supporting the tube bundle 11 is provided to the side plates 6a and 6b. The reinforcing columns 13 and the stays 14 are arranged along the 6b in a row and reinforce the strength of the side plates 6a and 6b.

In addition, the heat exchange section 8 connects both ends of the tube bundle 11 to each other.
It is supported by the tube plates 15a, 15b installed on the surfaces of the end plates 7a, 7b. Of the both ends of the tube bundle 11 supported by the tube plates 15a, 15b, one end of the tube is supplied with cooling water such as seawater. The condensate is generated by condensing the turbine exhaust flowing outside the pipe.

On the other hand, the hot well 9 is formed on the downstream side of the heat exchange section 8 so that the condensate produced in the heat exchange section 8 is temporarily stored and then supplied to a steam generator such as a nuclear reactor. ing.

In the condenser having such a structure,
In this embodiment, the lower body 3 is connected to the tube bundle 11 of the heat exchange unit 8.
A first lower body 17 which is formed by dividing the first lower body 17 and the second lower body 18 into two parts with a beam segment A-A based on the beam 16 provided at the lower end of the The second lower body 18 and the second lower body 18 are separately manufactured in the factory, and the manufactured first lower body 17 and the second lower body 18 are welded and assembled at the site.

The first lower body 17 is, as shown in FIG.
A support plate 12 that supports the heat exchange section 8 that includes the heat transfer tubes 10a and 10b, for example, a tube bundle 11 arranged in a bell shape.
The tube bundle 11 and the gas passage 1 are provided on the support plate 12.
9 and a baffle plate 20 that surrounds 9 and has an opening.

The support plates 12 are arranged in a row along the tube axes of the heat transfer tubes 10a and 10b (directions perpendicular to the paper surface), and are fixedly mounted on the tube bundle side plates 21 with the fall prevention pieces 22 interposed therebetween. At the same time, the bottom side of the beam 16 is provided on the beam 16 to prevent falls
2 is fixed and fixed.

The support plate 12 is supported by reinforcing beams 24 provided in parallel with the cutout portion 23 on the side of the tube bundle side plate 21 and the end portion on the opposite side thereof along the pipe axis. .

On the other hand, as shown in FIG. 3, the second lower body 18 divided by the line segment AA is formed of a bottom plate 25 and a hot well side plate 26 into, for example, a rectangular parallelepiped shape.
The second lower body 18 formed in a rectangular parallelepiped shape has the top plate 9a.
And the partition plate 9b that forms the flow path 9c that causes the condensate to meander, and forms the hot well 9 and the ceiling plate 9
On the top side of a, there are provided a reinforcing column 13 and a partition plate 30 for partitioning an opening (not shown) for guiding the turbine exhaust water of a turbine driven water supply pump or the drain of another heat exchanger to the hot well 9. There is.

Further, the second lower body 18 is provided with a vibration-proof reinforcing sleeve 29 connected to seismic strengthening for withstanding vibration during an earthquake.

The second lower body 18 is provided with a back ring 27 on the hot well side plate 26, and is connected to the first lower body 17 via the back ring 27.

On the other hand, the first lower body 17 and the second lower body 1
As shown in FIG. 4, 8 is a tube bundle side plate 21 of the first lower body 17 and a hot well side plate 26 of the second lower body 18.
A back ring 27 is interposed between and to make a welding connection. In this case, as shown in FIG. 5, the tube bundle side plate 21 of the first lower body 17 and the hot well side plate 26 of the second lower body 18 are provided with a support plate 31 fixed to the bottom plate 25. . This support plate 31 forms a notch escape portion 28, and facilitates the construction work when the tube bundle side plate 21 and the hot well side plate 26 are welded and connected via the back ring 27. .

A method of manufacturing and assembling the condenser according to the present embodiment will be described below.

First, in the factory, as shown in FIG. 1, the first lower body 17 in which the body 1 is divided into two parts along the line segment A--A.
And the second lower body 18 are separately manufactured.

The first lower body 17 is, as shown in FIG.
Install the beam 16 and then, as shown in FIG. 1, side plates 6a, 6
b and the end plates 7a and 7b are installed to form a rectangular parallelepiped box. The first lower body 17 formed in the box is
The support plates 12 are arranged in rows and fixed to the overturning prevention pieces 22, 22, 22 as shown in FIG. When the support plate 12 is fixedly mounted on the fall prevention pieces 22, 22, 22,
The first lower body 17 allows the support plate 12 to perform centering work,
After centering, the heat transfer tubes 10a and 10b are inserted into the support plate 12 using an automatic tube insertion device (not shown), and the tube bundle 1
1 to form the heat exchange section 8.

Thus, in this embodiment, the lower body 3
Is divided into a first lower body 17 and a second lower body 18 at a boundary of a line segment AA, which is based on the beam 16 provided at the lower end of the tube bundle 11 of the heat exchange unit 8, and is divided into two. 1 lower body 17
Since the height of the heat transfer tube is maintained at a position where the capacity of the automatic tube insertion device can be fully exerted, the scaffold is set high and the heat transfer tubes 10a, 10b are supported by the support plate 1 without danger of work.
2 can be easily inserted, and the work period can be shortened in combination with the reduction of work labor.

On the other hand, as shown in FIG. 3, the second lower body 18 is provided with a bottom plate 25 and then a hot well side plate 26.
A side plate and an end plate (both not shown) equipped with
The box is fixed to, for example, a rectangular parallelepiped box is formed.

In the second lower body 18 formed in the rectangular parallelepiped box, the partition plate 9b is provided on the bottom plate 25 to form the hot well 9 having the meandering flow passage 9c.
After forming, the top plate 9a is provided.

Further, in the second lower body 18, after providing the top plate 9a on the hot well 9, a vibration-proof reinforcing sleeve 29 is attached.

Further, the second lower body 18 is reinforced to support the tube bundle 11 and the like forming the heat exchange portion 8 of the first lower body 17 on the top plate 9a after the attachment and adjustment work of the vibration-proof reinforcing sleeve 29 is performed. A pillar 13 is provided.

Then, when the first lower body 17 and the second lower body 18 are completed, in this embodiment, the first lower body 17 and the second lower body 18 are carried into the site, where
As shown in FIGS. 4 and 5, the side plate 21 for the tube bundle of the first lower body 17 and the side plate 2 for the hot well of the second lower body 18
6 and 6 are welded to each other by a back ring 27.

As described above, in this embodiment, the second lower body 18 of the lower body 3 which is divided from the first lower body 17 is divided.
Since the height of the hot well 9 is kept low, the scaffold is set high and the hot spots 9 of the hot well 9 can be carried out without any danger of work.
It is possible to easily attach the partition plate 9b that forms a or the meandering flow passage 9c, and the work period can be shortened in combination with the reduction of the work labor.

[0047]

As described above, in the condenser according to the present invention, the lower body is divided into the first lower body and the second lower body, and the first lower body and the second lower body are divided into two. And the second lower body, which are separately manufactured and assembled, and the separately manufactured and assembled first lower body and the second lower body are easily connected to each other by using the connecting means, thus reducing the work labor. Together, they can shorten the construction period.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic assembly perspective view showing a condenser according to the present invention.

FIG. 2 is a front view showing a first lower body of the condenser according to the present invention.

FIG. 3 is a partially cutaway side view showing a second lower body of the condenser according to the present invention.

FIG. 4 is a partial view showing a connection state between a first lower body and a second lower body in the condenser according to the present invention.

FIG. 5 is a partially enlarged view showing a connection state between a first lower body and a second lower body in the condenser according to the present invention.

[Explanation of symbols]

1 torso 2 upper torso 3 lower torso 4 connecting body 5 Expanding body 6a, 6b side plate 7a, 7b End plate 8 heat exchange section 9 hot wells 9a Top plate 9b Partition plate 9c channel 10a, 10b heat transfer tube 11 tube bundle 12 Support plate 13 Reinforcement pillar 14 stay 15a, 15b tube sheet 16 beams 17 First Lower Body 18 Second lower body 19 gas passage 20 baffle 21 Tube bundle side plate 22 Fall prevention pieces 23 Notch 24 Reinforcing beams 25 Bottom plate 26 Side plate for hot well 27 Buckling 28 Notch relief part 29 Anti-vibration reinforcing sleeve 30 dividers

Claims (7)

[Claims] 1. A condenser for forming a fuselage by connecting a lower fuselage to an upper fuselage, wherein the lower fuselage is divided into a first lower fuselage and a second lower fuselage, and the first lower fuselage is divided into two. And the second lower body, which are separately manufactured in advance, and the first lower body and the second lower body, which are separately manufactured in advance, are connected to each other. 2. The first lower body and the second lower body are divided on the basis of a beam provided at a lower end of a tube bundle that forms a heat exchange section accommodated in the lower body. Condenser. 3. The condenser according to claim 1, wherein the first lower body and the second lower body are welded to each other by interposing connection means to connect the reinforcing columns by welding. 4. The condenser according to claim 3, wherein the connecting means is a buckling. 5. The condenser according to claim 1, wherein the second lower body is provided with a vibration-proof reinforcing sleeve. 6. The condenser according to claim 1, wherein the first lower body supports a tube bundle forming a heat exchange part and accommodates a support plate arranged in a row. 7. The condenser according to claim 1, wherein the second lower body is provided with a hot well which is closed by the top plate and forms a meandering flow path by the partition plate.