KR20160088800A

KR20160088800A - Flash box and steam condenser having the same

Info

Publication number: KR20160088800A
Application number: KR1020160002359A
Authority: KR
Inventors: 다카히로 와타나베
Original assignee: 가부시끼가이샤 도시바
Priority date: 2015-01-16
Filing date: 2016-01-08
Publication date: 2016-07-26
Also published as: JP2016133233A; KR101831220B1; TW201636555A; TWI616629B; JP6431383B2

Abstract

The flash box of the present embodiment is a flash box that is installed adjacent to a condenser main body of a condenser for condensing the vapor discharged from the steam turbine in the internal space thereof, and flashes the introduced heater drain. The flash box is provided with a box main body and a heat introducing portion which is disposed in an inner space of the box main body and introduces a heater drain into the internal space of the box main body and a heat shield member disposed between the box main body and the drain introductory portion.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a FLASH box and a condenser provided with the FLASH BOX and STEAM CONDENSER HAVING THE SAME.

An embodiment of the present invention relates to a flash box and a steam condenser having the flash box.

Generally, a condenser is installed in a thermal power plant or a nuclear power plant where a steam turbine is installed. The condenser is a device for condensing steam discharged from a steam turbine by cooling water to make condensed water. The condensate condensed by the condenser is generally sent to the heater, heated, and then supplied to the boiler. Thereafter, the plurality is further heated by the boiler to become steam. Thereafter, the vaporized vapor from the plurality is supplied back to the steam turbine to rotate the steam turbine.

In the heater in the above-mentioned system, a part of the turbine steam, which is generally supplied to the steam turbine, is supplied as the extraction steam, and this additional steam is used for the plurality of heating. The additional vapor supplied to the heater is condensed after a plurality of heating to become a liquid. This liquid is commonly referred to as a heater drain. When such heater drain is generated, the heater drain may flow into the condenser. Also, in a thermal power plant, a drain from a boiler sometimes flows into the condenser.

It is known that the heater drain as described above contains a large amount of dissolved oxygen. When a plurality of heater drains are mixed with such a large amount of dissolved oxygen, corrosion of each device in the system due to dissolved oxygen may occur. Therefore, a flash box may be provided in the condenser to degas the dissolved oxygen contained in the heater drain. In the flash box, the saturation temperature of the inner space is lower than the temperature of the heater drain, and the heater drain, which is high in temperature and high in pressure, can be expanded in its internal space. Accordingly, steam (flash steam) containing dissolved oxygen can be discharged from the heater drain and degassed. That is, the heater drain can be flashed (vaporized) to release dissolved oxygen together with the vapor from the heater drain. Such a flash box is generally provided separately from a casing (a main body of a condenser) for condensing the turbine steam, and is installed on the outer wall surface of the main body of the condenser. Further, in the case of the condenser, the drain from the boiler may be introduced into the flash box and then the drain may be introduced into the condenser main body. In this case, the flash box lowers the temperature of the high-temperature drain and flows into the condenser main body. Thus, damage such as thermal deformation of the main body of the condenser is prevented. In some cases, a heater drain and a drain from the boiler flow into the flash box.

As a technique related to the flash box, for example, a structure in which a recessed heater drain flow path inverted in a flash box is provided is known. According to this configuration, it is possible to improve the efficiency of the degassing. As such, Japanese Patent No. 5197602 (hereinafter referred to as Patent Document 1) is known.

However, the high-temperature drain (hereinafter referred to as "drain") from the heater drain or the boiler is a high energy fluid and is high temperature and high pressure. Therefore, when the flash box is applied to the condenser, if the drain flows into the flash box at a high temperature, the temperature of the casing or the like of the flash box rises, and thermal stress occurs in the casing and the like.

As a countermeasure for solving such a problem, for example, a constitution may be employed in which the drain is thermally lowered by a thermostat provided separately from the condenser and the flash box, and then introduced into the flash box. However, this configuration has a problem in that the configuration and arrangement of the system can be complicated by securing the space for installing the thermosensor, installing the piping for the cooling water to be supplied to the thermosensor, and the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flash box and a condenser equipped with the flash box, which are capable of allowing a drain of a high-energy fluid to flow into the flash box with a simple structure.

A flash box according to an embodiment is a flash box that is installed adjacent to a condenser main body of a condenser for condensing vapor discharged from a steam turbine in an internal space thereof, and flashes a drain to be introduced. The flash box includes a box body, a drain introduction portion disposed in the internal space of the box body for introducing the drain into the internal space of the box body, and a heat shielding portion disposed between the box body and the drain introduction portion ) Member.

In addition, the condenser according to the embodiment includes a condenser main body for condensing the steam discharged from the steam turbine in the internal space thereof, and the aforementioned flash box provided adjacent to the condenser main body.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram of an example of a power generation system provided with a condenser equipped with a flash box according to a first embodiment; Fig.
Fig. 2 is a top view of a plurality of flashboxes according to the first embodiment; Fig.
3 is a sectional view taken along the line III-III in Fig.
4A is a sectional view of the flash box surrounded by the Z area shown in Fig. 3, and Fig. 4B is a sectional view of the flash box along the line IV-IV of Fig. And FIG. 4 (C) is a cross-sectional view of the heat-generating member provided in the flash box.
5 is a cross-sectional view for explaining a second embodiment. FIG. 5A is a cross-sectional view of a flash box according to a second embodiment corresponding to the Z area shown in FIG. 3, and FIG. 5B is a cross- 5 is a sectional view of the flash box along the line VV in Fig. 5 (A); Fig.
6 is a cross-sectional view illustrating the third embodiment. FIG. 6A is a cross-sectional view of the flash box according to the third embodiment corresponding to the Z area shown in FIG. 3, and FIG. 6B is a cross- Sectional view taken along the line VI-VI in Fig. 6 (A).
7 is a cross-sectional view illustrating the fourth embodiment, and is a cross-sectional view of the flash box according to the fourth embodiment corresponding to the Z area shown in Fig. 3;
8 is a cross-sectional view for explaining the fifth embodiment, and is a sectional view of the flash box according to the fifth embodiment corresponding to the Z area shown in Fig. 3;
9A and 9B are views for explaining a modification of the fifth embodiment.
10 is a view for explaining a modified example of the heat member of the first to fifth embodiments;

Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings.

(First Embodiment)

1 is a schematic diagram of an example of a power generation system provided with a condenser 100 having a flash box 10 according to the first embodiment. 1, the steam turbine 1 is supplied with the turbine steam S1, and the rotation of the steam turbine 1 is transmitted to the generator 3 via the rotary shaft 2 . As a result, the generator 3 is rotated and power generation is performed.

In this power generation system, for example, the condenser 100 according to the present embodiment is provided to condense the exhaust steam S2 discharged from the steam turbine 1 by cooling water to make a plurality of (W). 1, the condenser 100 according to the present embodiment includes a condenser main body 101 and a flash box 10, and in the illustrated power generation system, So that the steam S2 is introduced. Here, the condenser main body 101 means a casing portion that forms an internal space into which the exhaust steam S2 from the steam turbine 1 flows and is condensed.

The power generation system shown in the figure is a power generation system in which a plurality of condensed wafers W are introduced into the heater 4 in the condenser main body 101 and turbine vapors S1 (S1) supplied to the steam turbine 1 Is supplied as the additional steam (S3). In the heater 4, the additional vapor (S3) is used for heating a plurality of (W), and the additional vapor (S3) is condensed after heating a plurality of (W) In this example, the flash box 10 is provided for degassing and discharging the dissolved oxygen contained in the heater drain D discharged from the heater 4.

Hereinafter, the condenser 100 including the flash box 10 according to the present embodiment will be described in detail. Fig. 2 shows a top view of the condenser 100, and Fig. 3 shows a sectional view along the line III-III in Fig. 3, the cross section of the flash box 10 is schematically shown for convenience of explanation.

2 and 3, the condenser 100 according to the present embodiment includes the above-described condenser main body 101 and flash box 10, and the flash box 10 is provided in the main body 101 of the condenser And are disposed adjacent to each other. A water chamber 102 is provided in the main body 101 of the condenser. The water chamber 102 communicates cooling water for cooling the exhaust steam S2 (refer to FIG. 1) introduced into the condenser main body 101 into a tubular group 103 , And discharges the cooling water that has passed through the tubular group 103. [ Details of these water chamber 102 and custom tube group 103 will be described later.

The main body 101 of the present embodiment has an upper portion 101U disposed on the upper side and a lower portion 101D connected to the lower portion of the upper portion 101U, And a flow passage for passing the exhaust steam S2 discharged from the steam turbine 1 toward the lower portion 101D is formed. The lower portion 101D forms an internal space for condensing the exhaust steam S2 that has passed through the upper portion 101U.

The lower portion 101D is formed into a box shape having a rectangular shape in cross section and extending in the vertical direction. Specifically, the lower portion 101D includes a pair of first wall portions 111A which are opposed to each other and extend along each other, and a pair of second wall portions 111B ). One end of one pair of first wall portions 111A is connected by one of the pair of second wall portions 111B and the other end of the pair of first wall portions 111A is connected between the other end portions of the pair of first wall portions 111A Are connected by the other of the pair of second wall portions 111B.

The aforementioned water chamber 102 is provided on the outer wall surface of the pair of first wall portions 111A of the lower portion 101D and the water chamber 102 has the inflow water chamber 102A and the outflow water chamber 102B have. The inflow water chamber 102A is provided on one of the pair of first wall portions 111A and the outflow side water chamber 102B is provided on the other of the pair of first wall portions 111A, Respectively. The inflow-side water chamber 102A and the outflow-side water chamber 102B are arranged so as to face each other with the lower portion 101D therebetween. In this embodiment, two water rooms 102 are provided on the outer wall surface of the pair of first wall portions 111A as an example.

3 schematically shows the above-mentioned tubular group 103 disposed in the body 101 of the condenser. The tubular group 103 is disposed between the inflow-side water chamber 102A and the outflow-side water chamber 102B so as to pass through the lower portion 101D. In the water chamber 102, the cooling water flowing into the inflow water chamber 102A is supplied to the tubular group 103. The outflow-side water chamber 102B is configured to discharge the cooling water that has passed through the tubular group 103. [

Thereby, in the condenser main body 101, the exhaust steam S2 introduced into the inner space of the lower portion 101D is cooled by the cooling water passing through the tubular group 103 and condensed to make a plurality of (W) It is possible. As the cooling water passing through the tubular group 111C, seawater is generally used, but other cooling water may be used.

On the other hand, in the present embodiment, the flash box 10 is provided adjacent to the outer wall surfaces of the pair of second wall portions 111B of the lower portion 101D. 2 and 3, reference numeral 104 denotes a plurality of pipes 104 for allowing the heater drain D discharged from the heater 4 shown in Fig. 1 to flow into the flash box 10. As shown in Fig. These pipes 104 are connected to a drain pipe 13 (see FIG. 4) having a drain inlet portion 12 to be described later, which is provided in the flash box 10. The heater drain D is supplied to the drain pipe 13 from the pipe 104 so that the heater drain D can be introduced into the inner space of the flash box 10. [

Hereinafter, the flash box 10 will be described in detail.

4A is a detailed sectional view of the flash box 10 surrounded by the Z area shown in Fig. 3, and Fig. 4B is a sectional view taken along the line IV-IV in Fig. 4A And shows the cross section of the following flash box 10. 4 (C) shows the cross-sectional shape of the heat shield member 14 provided in the flash box 10, which will be described later.

4A and 4B, the flash box 10 of the present embodiment includes a box body 11 and a box body 11 which is disposed in the inner space of the box body 11, A drain pipe (drain member) 13 having a drain inlet portion 12 for introducing the heater drain D into the internal space and a heat shield member 14 disposed between the box body 11 and the drain inlet portion 12 Respectively.

The box body 11 of the present embodiment includes a side wall portion 21 having a rectangular shape in cross section and extending in the vertical direction, a rectangular bottom wall portion 22 for closing the lower end portion of the side wall portion 21, (Top wall portion) 23 for closing the upper end portion of the side wall portion 21. As shown in Fig. The side wall portion 21, the bottom wall portion 22, and the wall portion 23 are each formed of, for example, carbon steel or the like.

As shown in Figs. 3 and 4A, the longitudinal cross-sectional shape of the box main body 11 is a long length along the second wall portion 111B of the lower portion 101D of the main body 101 as a whole And is formed in an elongated rectangular shape. 2, the cross-sectional shape of the side wall portion 21 of the box body 11 is a rectangular shape extending long along the second wall portion 111B of the lower portion 101D of the main body 101 of the condenser 101 Respectively. Hereinafter, for the sake of convenience of explanation, in the cross-sectional view of the side wall portion 21, the long side direction in which the side wall portion 21 extends for a long time is referred to as a width direction and the short side direction orthogonal to the long side direction of the side wall portion 21 is referred to as a thickness Direction.

As shown in Fig. 4 (A), in the present embodiment, a plurality of reinforcing members 24 are provided between the wall portions facing each other in the thickness direction in the side wall portion 21. As shown in Fig. As a result, the rigidity of the box body 11 is secured. The reinforcing member 24 is made of a pipe material in the illustrated example and has one end bonded to one of the wall portions facing in the thickness direction of the side wall portion 21 and the other end joined to the side wall portion 21 are bonded to the other of the wall portions opposed to each other in the thickness direction.

More specifically, as shown in Fig. 4B, the plurality of reinforcing members 24 are arranged so as to be spaced apart from each other in the vertical direction and spaced apart in the width direction of the side wall 21. As shown in Fig. More specifically, the rows of the reinforcing members 24 arranged in the vertical direction are parallel to the row of the adjacent reinforcing members 24, and the rows of the reinforcing members 24 arranged in the width direction of the side walls 21 Are positioned in parallel with the row of adjacent reinforcing members 24.

A plurality of drain pipes 13 having drain inlet portions 12 according to the present embodiment are provided so as to penetrate the side wall portions 21 of the box body 11 from the outside, Extended. Specifically, each of the drain pipes 13 penetrates a wall portion of the side wall portion 21 of the box body 11, which portion is opposite to the side of the condenser body 101, in the wall portion opposed in the thickness direction. One end of the drain pipe 13 is exposed to the outside and connected to the piping 104 described above. The other end of the drain pipe 13 is joined to the inner wall surface of the wall portion on the side of the condenser main body 101 in the wall portion opposed in the thickness direction.

As shown in Fig. 4 (B), the plurality of drain pipes 13 are arranged so as to be spaced apart in the vertical direction and at intervals in the width direction of the side wall 21. As shown in Fig. Specifically, the rows of the drain pipes 13 arranged in the vertical direction are located parallel to the rows of the adjacent drain pipes 13, and the rows of the drain pipes 13 arranged in the width direction of the side walls 21 are adjacent to the drain And is located parallel to the row of the tube (13). Further, in the illustrated example, the drain pipe 13 is provided so as to be positioned between the reinforcing members 24 adjacent to each other in the vertical direction.

The drain pipe 13 is formed such that when the heater drain D is stored on the bottom wall portion 22 side of the box body 11 from the liquid level of the heater drain D, Position. This is because when the heater drain D is introduced from the drain introducing portion 12 of the drain tube 13, the heater drain D is discharged to the heater drain (not shown) that has already been stored on the bottom wall portion 22 side of the box body 11 D), vapor (flash vapor) containing dissolved oxygen emitted from the heater drain D becomes difficult to be discharged from the heater drain D.

In the present embodiment, the drain inlet portion 12 of the drain pipe 13 is located between the both ends of the portion of the drain pipe 13 inserted into the inside of the box body 11 Respectively. The drain inlet portion 12 of the present embodiment is formed as an opening (hole) that opens downward, and a plurality of the drain inlet portions 12 are formed in each drain pipe 13. Accordingly, in the present embodiment, the heater drain D, which is introduced from one end of the drain pipe 13 and passed through the inside of the drain pipe 13, is introduced from the drain inlet portion 12 downward .

Next, FIG. 4C shows the cross-sectional shape of the heat-conducting member 14 of the present embodiment. As shown in Figs. 4 (A) to 4 (C), the heat member 14 of the present embodiment has a rectangular shape in cross section and is formed so as to extend in the up and down direction, . The cross section of the heat shield member 14 is formed in a rectangular shape extending long along the second wall portion 111B of the lower portion 101D of the condenser body 101. [ For convenience of explanation, the longitudinal direction in which the heat conducting member 14 is extended in the longitudinal direction is referred to as the width direction, and the heat conducting member 14 14 is referred to as the thickness direction.

This heat shield member 14 is provided so as to cover the entire side wall 21 of the box body 11 from the inside as well as to enclose the drain inlet portion 12 in all directions in a cross section view. It is preferable that a gap of 50 mm or more is provided between the heat shield member 14 and the side wall portion 21 of the box body 11. The heat shield member 14 is formed of, for example, carbon steel or the like. As described above, the box body 11 is also made of carbon steel or the like, but it is preferable to use a member having superior heat resistance to the material of the box body 11 as the material of the heat shield member 14. [

In the present embodiment, a plurality of through-holes for passing through the reinforcing member 24 and a plurality of through-holes for passing through the drain pipe 13 are formed in each of the wall portions of the heat- Is installed. The reinforcing member 24 and the drain pipe 13 penetrate through these through holes and at least the reinforcing member 24 supports the load of the heat shield member 14. [ Accordingly, the heat shield member 14 is fixedly supported on the reinforcing member 24. [

In the present embodiment, on the upper side of the box body 11, a degassing oxygen discharge portion 26 for discharging oxygen deaerated from the heater drain D, which is introduced from the drain pipe 13 and contains dissolved oxygen, Respectively. A drain discharging portion 27 for discharging the heater drain D introduced from the drain pipe 13 into the inner space of the condenser main body 101 is provided on the lower side of the box main body 11. [

The degassing oxygen discharge unit 26 allows the oxygen deaerated from the heater drain D to flow into the accommodating portion 26A disposed in the inner space of the box body 11 to allow the oxygen in the inner space of the condenser main body 101 And discharges it to the gas phase portion. The drain discharge portion 27 is formed in the housing main body 11 so that the heater drain D stored in the bottom wall portion 22 side of the box body 11 flows into the housing portion 27A disposed in the inner space of the box body 11 And discharges it to the inner space of the main body 101 of the condenser. Here, when the heater drain D is stored in the bottom wall portion 22 side of the box body 11, the liquid level can reach the vicinity of the upper end of the accommodating portion 27A of the drain discharging portion 27. [ Therefore, it is preferable that the drain pipe 13 and the drain inlet portion 12 are disposed above the accommodating portion 27A of the drain exhaust portion 27. [

Next, the operation of the first embodiment having the above-described configuration will be described.

According to the condenser 100 according to the present embodiment, when the power generation system shown in Fig. 1 is operated, the exhaust steam S2 discharged from the steam turbine 1 flows into the main body 101 of the condenser. At this time, the exhaust steam S2 flowing into the inner space of the condenser main body 101 is condensed by the cooling water into a plurality of (W). A plurality of W condensed by the condenser main body 101 flows into the heater 4 and a part of the turbine steam S1 supplied to the steam turbine 1 is supplied to the heater 4, . Then, the heater 4 heats the plurality (W) by the additional steam (S3). Thus, the additional vapor (S3) is condensed after heating a plurality of (W), thereby forming a heater drain (D) which is a liquid. The heater drain D is introduced into the inner space of the flash box 10 from the drain introduction portion 12 through the pipe 104 and the drain pipe 13.

The heater drain D introduced from the drain introducing portion 12 is inserted into the side wall portion of the box body 11 by the heat shielding member 14 interposed between the drain introducing portion 12 and the box body 11. [ 21 is prevented from being directly brought into contact with the inner surface of the box body 11. The heat of the heater drain D causes the temperature of the box body 11 to rise so that thermal stress is generated in the box body 11 or the heater drain D is directly applied to the inner wall surface of the box body 11 It is possible to prevent occurrence of erosion.

The heater drain (D) expands in the internal space of the box body (11) to emit vapor (flash steam) containing dissolved oxygen. The dissolved oxygen is deaerated from the heater drain (D) by this vapor. The degassed oxygen floats upwards and is discharged from the degassing oxygen discharge portion 26. On the other hand, the heater drain D that has discharged the vapor containing dissolved oxygen falls downward and is stored on the side of the bottom wall 22 of the box body 11 and then discharged from the drain discharging portion 27 to the condenser main body 101 And mixed into a plurality of (W). Thereafter, a plurality of wafers W are introduced into the heater 4. Here, in the flash box 10, the heater drain D is cooled down by falling downward. Thus, the heater drain D can be discharged to the main body 101 without interfering with the main body 101 of the condenser, that is, while suppressing the temperature rise of the main body 101 of the condenser.

According to the present embodiment as described above, in the flash box 10, the heat shield member 14 is interposed between the drain lead-in portion 12 and the box main body 11, D is prevented from coming into direct contact with the box body 11. Thus, the flash box 10 can allow the heater drain D, which is a high-energy fluid, to flow into the flash box 10 with a simple structure without providing any other warmer or the like.

In the present embodiment, the flash box 10 further includes a reinforcing member 24 provided between the opposed wall portions of the box body 11 (the side wall portion 21) (14) is fixedly supported on the reinforcing member (24). According to this, since the heat shield member 14 can be fixedly supported by using the member for securing the rigidity of the flash box 10, the number of parts can be suppressed and the heat shield member 14 can be easily installed.

In the present embodiment, the drain introducing portion 12 is formed in the drain pipe 13, which is a drain member installed in a state of passing through the wall portion of the box body 11, and the drain pipe 13 is formed along the reinforcing member Extended. According to this, since the drain pipe 13 is arranged with a space efficiency in the inner space of the flash box 10, the drain inlet portion 12 can be compactly installed without complicating the drain opening. Further, since the drain pipe 13 and the reinforcing member 24 are disposed along with each other, they are prevented from interfering with each other at the time of assembly, and assembly is facilitated.

In the present embodiment, the degassing oxygen discharge portion 26 is disposed on the upper side of the flash box 10, which is the side where the vapor discharged from the heater drain D floats upward. Thus, the degassed oxygen is effectively exhausted by the degassing oxygen outlet 26. Thereby, it is possible to prevent oxygen from remaining in the flash box 10.

In the present embodiment, the drain discharge portion 27 is disposed on the lower side of the flash box 10, which is the side where the heater drain D falls. Accordingly, the heater drain (D) is efficiently discharged by the drain discharge portion (27). As a result, the heater drain D can be efficiently joined to the plurality of wirings.

(Second Embodiment)

Next, the flash box 10 according to the second embodiment will be described with reference to Fig. Constituent elements in the present embodiment that are the same as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

5, the flash box 10 of the present embodiment is provided with a cooling medium introducing device 30 for introducing a cooling medium between the inner wall surface of the box body 11 and the outer wall surface of the heat shield member 14 Respectively. The cooling medium introduction device 30 of the present embodiment uses air (A) for cooling as a cooling medium. As shown in Fig. 5A, in this example, the introduction position (supply position) of the air A of the cooling medium introducing device 30 is arranged on the lower side of the box body 11. [ A plurality of cooling medium discharging portions 31 for discharging the air A introduced from the cooling medium introducing device 30 are provided in the wall portion 23 of the box body 11.

5 (A) and 5 (B), in this embodiment, the heat-conducting member 14 has the top wall portion 14A at the upper end portion thereof and the bottom wall portion 14B at the bottom end portion thereof , And is not opened upward and downward. Thus, the heater drain (D) introduced from the drain inlet portion (12) is configured not to flow out to the outside of the heat shield member (14).

In the present embodiment, the degassing oxygen discharging portion 26 penetrates the upper side of the box body 11 and the heat shield member 14, and flows from the inner space of the heat shield member 14 through the heater drain D And is designed to discharge oxygen to be degassed. The drain discharge portion 27 of the present embodiment penetrates the lower side of the box body 11 and the heat shield member 14 to discharge the heater drain D from the inner space of the heat shield member 14 .

According to the present embodiment, the same effects and advantages as those of the first embodiment can be obtained, and it is also possible to provide a cooling medium introduction device (30) which is provided between the inner wall surface of the box body (11) and the outer wall surface of the heat shield member It is possible to introduce cooling air A into the heat shield member 14 and the box body 11. Thus, the temperature rise of the heat shield member 14 can be suppressed and thermal stress can be prevented from being generated in the heat shield member 14. Further, it is possible to more reliably prevent occurrence of thermal stress in the box body 11 by suppressing the temperature rise of the box body 11. Since the heater drain D can be cooled by the cooling air A, the heater drain D can be reliably discharged to the main body 101 without hindrance.

Although air (A) is used as the cooling medium in the second embodiment, cooling water may be used as the cooling medium introduced from the cooling medium introduction device 30. [ As the cooling water, a plurality of (W), sea water, or other cooling water condensed in the condenser main body 101 can be used. When the cooling water is used as the cooling medium, the heat-generating member 14 and the box body 11 can be cooled with a high heat transfer rate, so that the cooling effect can be improved. In addition, when a plurality of (W) cooling water is used, the piping for cooling can be extended from the condenser main body 101 or the like located relatively close to the flash box 10, . In addition, when seawater is used as the cooling water, since a large amount of low-temperature cooling water can be easily secured, the cooling effect can be improved.

(Third Embodiment)

Next, a description will be given, with reference to FIG. 6, of a condenser 100 provided with a flash box 10 according to a third embodiment. Constituent elements in this embodiment that are the same as constituent elements in the first or second embodiment are denoted by the same reference numerals and description thereof is omitted.

The flash box 10 of the present embodiment is provided with a cooling medium introducing device 30 using a plurality of (W) condensed in the condenser main body 101 as cooling water. The cooling medium introducing device 30 is installed in the wall portion 23 of the box body 11. [

Specifically, as shown in Fig. 6 (A), the configuration of the box body 11 and the heat shield member 14 of the present embodiment is the same as that of the first embodiment. In this case, between the inner wall surface of the box body 11 and the outer wall surface of the heat-shielding member 14, the inner wall surface of the box body 11 and the outer wall surface of the heat- Is formed. 6 (B), the cooling medium introducing device 30 of the present embodiment has a cross-sectional view in which a space between the inner wall surface of the box body 11 and the outer wall surface of the heat shield member 14 A plurality of slit-shaped discharge holes 30A arranged so as to be arranged along the vertical direction, and the cooling water is introduced downward along the vertical direction from the discharge holes 30A. Specifically, the cooling water is sprayed in the form of a spray. In addition, the cooling water may be dropped from the discharge hole 30A without being sprayed in a spray shape.

The discharge holes 30A are spaced apart by a predetermined distance such as 100 mm and each discharge hole 30A is formed in a space between the inner wall surface of the box body 11 and the outer wall surface of the heat shield member 14. [ As shown in Fig. 6 (B), the long-side direction of the slit-shaped discharge hole 30A is a direction from the inner wall surface of the box body 11 toward the outer wall surface of the heat-shielding member 14 . One of both end portions in the long-side direction of the discharge hole 30A is close to the inner wall surface of the box body 11 and the other is close to the outer wall surface of the heat-conducting member 14. [ The long-side direction of the slit-shaped discharge hole 30A may be along the inner wall surface of the box body 11 and the outer wall surface of the heat-shielding member 14 in other directions, for example, a cross-sectional view.

In the present embodiment, the above-described cooling medium introducing device 30 is installed on the side of one wall and the side of the other wall in the thickness direction of the side wall 21 of the box body 11 . The ejection holes 30A are formed in the side wall portions of the box body 11 in the thickness direction of the side wall portion 21 and in the cooling medium introduction device 30 provided on the other wall side, 21 in the width direction.

In the present embodiment, the degassing oxygen discharging portion 26 penetrates the upper side of the box main body 11 and the heat shield member 14 to discharge the deaerator oxygen from the inner space of the heat shield member 14 through the heater drain D And is designed to discharge oxygen to be degassed. The drain discharge portion 27 of the present embodiment is configured to penetrate the lower side of the box body 11 and discharge the heater drain D from the internal space of the box body 11. [ Here, in the present embodiment, the drain discharge portion 27 discharges a plurality (W) of cooling water introduced by the cooling medium introduction device 30. Since the heater drain D is consequently mixed with a plurality of wafers W in the inner space of the condenser body 101, there is no problem if these are mixed with the heater drain D when a plurality of cooling water is W .

According to the present embodiment, the same operation and effect as those of the first embodiment can be obtained, and it is possible to prevent the cooling medium introducing device 30 Cooling water can be introduced, and the heat shield member 14 and the box body 11 can be cooled.

The cooling medium introducing device 30 has a plurality of slit-shaped ejection holes 30A arranged to be arranged along a space between the inner wall surface of the box body 11 and the outer wall surface of the heat-shielding member 14 in a cross- And the cooling water is introduced downward from the discharge hole 30A. This makes it easier to uniformly supply the cooling water to the heat shield member 14 and the box body 11. That is, for example, when cooling water is sprayed from the circular hole toward the space between the inner wall surface of the box body 11 and the outer wall surface of the heat-shielding member 14 in a sprayed shape, Cooling water is locally sprayed on the inner wall surface and the outer wall surface of the heat shield member 14 so that the cooling water is hardly supplied to the inner wall surface of the box body 11 and particularly to the lower side of the outer wall surface of the heat shield member 14. On the other hand, When the cooling water is introduced from the plurality of slit-shaped discharge holes 30A, the directivity of the cooling water directed downward is higher than that of the circular holes, so that the cooling water is uniformly distributed between the inner wall surface of the box body 11 and the heat- In the present invention. Even if the heat shield member 14 is opened upward as in the present embodiment, the cooling water introduced from the cooling medium introducing device 30 is prevented from flowing into the inside of the heat shield member 14 by the steam emitted from the heater drain D It is possible to prevent the steam from rising upward.

In the present embodiment, the long-side direction of the slit-shaped discharge hole 30A extends from the inner wall surface of the box body 11 toward the outer wall surface of the heat-conducting member 14, and the long side of the discharge hole 30A One of the opposite end portions in the direction of the arrow A is close to the inner wall surface of the box body 11 and the other is close to the outer wall surface of the heat- According to this, the cooling water can be uniformly supplied by the heat shield member 14 and the box body 11.

(Fourth Embodiment)

Next, the flash box 10 according to the fourth embodiment will be described with reference to Fig. Constituent elements similar to those of the first to third embodiments among the constituent elements in the present embodiment are denoted by the same reference numerals and description thereof is omitted.

7, the flash box 10 of the present embodiment is provided with the cooling medium introducing device 30 provided in the wall portion 23 of the box body 11 as in the third embodiment, In the cooling-medium introducing device 30 of the type described above, seawater is used as cooling water. Therefore, the heat shield member 14 of the present embodiment has the wall portion 14A at the upper end portion thereof, has the bottom wall portion 14B at the lower end portion thereof, and is not opened upward and downward.

On the other hand, a cooling medium discharge portion 31 for discharging the seawater as the cooling water introduced from the cooling medium introduction device 30 is provided on the bottom wall portion 22 side of the box body 11. [

According to this embodiment, the same operation and effect as those of the third embodiment can be obtained, and by using seawater as the cooling water, it is possible to easily secure a large amount of cooling water at a low temperature, .

(Fifth Embodiment)

Next, the flash box 10 according to the fifth embodiment will be described with reference to Fig. Constituent elements similar to those of the first to fourth embodiments among the constituent elements in this embodiment are designated by the same reference numerals and the description thereof is omitted.

As shown in Fig. 8, the flash box 10 of the present embodiment further includes a plurality of pins 40 projecting outward from the outer wall surface of the box body 11. As shown in Fig. The other structures are the same as those of the first embodiment. Although the fin 40 of the present embodiment is formed in a bar shape, it may have a T shape or a triangle shape as shown in the modification example shown in Figs. 9A and 9B.

According to the present embodiment, the same effects and advantages as those of the first embodiment are obtained, and the surface area of the box body 11 is increased by the fins 40, so that heat dissipation of the box body 11 is improved. As a result, the temperature of the box body 11 is easily cooled due to the influence of the heater drain D, and the temperature rise of the box body 11 can be suppressed. In addition, the shapes of FIGS. 9A and 9B are easier to secure the cooling performance because the surface area can be easily increased as compared with the rod shape. The pin 40 is also applicable to the second to fourth embodiments.

10 shows a modification common to the heat member 14 of the first to fifth embodiments. As shown in Fig. 10, the heat shield member 14 may be formed of a wavy plate material. In this case, heat radiating property is improved by increasing the surface area of the heat shield member 14, so that the heat shield member 14 having a temperature raised due to the influence of the heater drain D is easily cooled and the temperature rise of the heat shield member 14 is suppressed can do. Further, in the configuration in which the cooling medium is introduced as in the second to fourth embodiments, the contact area with the cooling medium is increased so that the heat quantity to be exchanged is increased, the temperature rise of the heat shield member 14 is further suppressed, D can be efficiently cooled and the cooling effect can be improved.

Although the embodiment of the present invention has been described above, the embodiment described above is provided as an example and is not intended to limit the scope of the invention. This new embodiment can be implemented in various other forms, and various omissions, substitutions, and alterations can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and spirit of the invention, and are included in the scope of the invention described in the claims and their equivalents.

For example, the power generation system shown in Fig. 1 shows an example of a power generation system in which a plurality of converters 100 equipped with the flash box 10 according to each of the above-described embodiments are installed, and the flash box 10 It is needless to say that the present invention may be applied to a power generation system having a configuration different from that of FIG.

1, the structure in which the flash box 10 is supplied with the heater drain D from the heater 4 has been described. However, the flash box 10 is not limited to the structure in which the other device (Such as a high-temperature drain from the boiler) may be supplied. In the above-described embodiments, the box body 11 of the flash box 10 has a rectangular-shaped structure in a cross-sectional view, but the shape is not limited thereto. For example, the box body 11 has a substantially U-shape in cross-section, and the box body 11 has both end portions of substantially U-shape connected to the wall portion of the main body 101 to form a closed end surface shape And the heat-generating member 14 or the like may be disposed in the closed space.

10: flash box 11: box body
12: drain introduction part 13: drain pipe
14: Heating member 14A:
21: side wall portion 22: bottom wall portion
23: right wall portion 24: reinforcing member
26: degassing oxygen discharge portion 27: drain discharge portion
30: Cooling medium introduction device 30A: Discharge hole
31: cooling medium discharge part 40: pin
100: a condenser 101: a condenser body
101U: upper side portion 101D: lower side portion
102: water chamber 102A: inflow water chamber
102B: Outflow side water chamber 103: Customs group
104: piping 111A: first wall portion
111B: second wall portion S1: turbine steam
S2: Exhaust steam S3: Extra steam
W: Multiple D: Heater drain
A: air

Claims

A flash box which is installed adjacent to a condenser main body of a steam condenser for condensing the steam discharged from a steam turbine in an internal space thereof and flashes an introduced drain,
A box body,
A drain introduction part disposed in the internal space of the box body and introducing the drain into the internal space of the box body;
A heat-insulating member disposed between the box body and the drain-
Wherein the flash box comprises:

The method according to claim 1,
Further comprising a cooling medium introducing device for introducing a cooling medium between an inner wall surface of the box body and an outer wall surface of the heat-shielding member.

3. The method of claim 2,
Wherein the cooling medium introduction device uses air for cooling as the cooling medium.

3. The method of claim 2,
Wherein the cooling medium introduction device uses cooling water as the cooling medium.

5. The method of claim 4,
Wherein the cooling medium introducing device uses condensed water condensed in the condenser body as the cooling water.

5. The method of claim 4,
Wherein the cooling medium introducing device uses seawater as the cooling water.

5. The method of claim 4,
A space extending in the vertical direction is formed between the inner wall surface of the box body and the outer wall surface of the heat-shielding member,
Wherein the cooling medium introducing device has a plurality of slit-shaped discharge holes arranged to be arranged along a space between an inner wall surface of the box body and an outer wall surface of the heat-shielding member in a cross-sectional view, And the lower surface of the flash box.

The method according to claim 1,
Further comprising a reinforcing member provided between the opposing wall portions of the box body, wherein the heat-shielding member is fixedly supported by the reinforcing member.

9. The method of claim 8,
Wherein the drain introduction portion is formed in a drain member that is installed to penetrate the wall portion of the box body, and the drain member extends along the reinforcing member.

The method according to claim 1,
Further comprising a fin protruding outwardly from an outer wall surface of the box body.

11. The method of claim 10,
Wherein the pin is a bar-shaped, T-shaped or triangular shape.

The method according to claim 1,
Wherein the heat-shielding member is formed of a wavy plate material.

The method according to claim 1,
Further comprising a degassing oxygen discharge portion which is disposed on the upper side and discharges oxygen released from the drain containing dissolved oxygen which is introduced from the drain discharge portion.

The method according to claim 1,
Further comprising a drain discharging portion disposed at a lower side of the main body and discharging the drain introduced from the drain introducing portion to an internal space of the main body of the condenser.

A condenser main body for condensing the steam discharged from the steam turbine in its internal space,
And the flash box according to claim 1, which is provided adjacent to the main body of the condenser.