GB2553882A - Multi-pressure type condenser - Google Patents

Multi-pressure type condenser Download PDF

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Publication number
GB2553882A
GB2553882A GB1709083.8A GB201709083A GB2553882A GB 2553882 A GB2553882 A GB 2553882A GB 201709083 A GB201709083 A GB 201709083A GB 2553882 A GB2553882 A GB 2553882A
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Prior art keywords
condenser
pressure
condensers
condensed water
low
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GB1709083.8A
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GB2553882B (en
GB201709083D0 (en
Inventor
Ikeda Haruhiko
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Hitachi GE Nuclear Energy Ltd
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Hitachi GE Nuclear Energy Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/184—Indirect-contact condenser
    • Y10S165/192—Indirect-contact condenser including means to heat collected condensate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/10—Steam heaters and condensers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

A multi-pressure condenser provided in a large-capacity power plant operates each of at least three condensers 1, 2, 3 at different degrees of vacuum (pressure). The condensers include a first condenser 1 having the lowest internal pressure among the at least three condensers, a second condenser 2 having the second lowest internal pressure after the first condenser, and a third condenser 3. The multi-pressure condenser further comprises a first communication pipe 6A which connects the first and third condensers to guide condensed water from the first to the third condenser. Separate low-pressure steam turbines 100, 200, 300 may each be disposed in an upper part of each of the three or more condensers and connected to each other by a rotation shaft. The third condenser with the highest internal pressure among the at least three condensers may be disposed between two of the other condensers along the rotation shaft. A second communication pipe 6B may connect the second and third condensers to guide condensed water from the second to the third condenser (Fig.2). A conductivity measuring device (50, Fig.3) which measures the conductivity of the condensed water may be provided in the first and second communication pipes.

Description

(54) Title of the Invention: Multi-pressure type condenser Abstract Title: Multi-pressure condenser (57) A multi-pressure condenser provided in a large-capacity power plant operates each of at least three condensers 1, 2, 3 at different degrees of vacuum (pressure). The condensers include a first condenser 1 having the lowest internal pressure among the at least three condensers, a second condenser 2 having the second lowest internal pressure after the first condenser, and a third condenser 3. The multi-pressure condenser further comprises a first communication pipe 6A which connects the first and third condensers to guide condensed water from the first to the third condenser. Separate low-pressure steam turbines 100, 200, 300 may each be disposed in an upper part of each of the three or more condensers and connected to each other by a rotation shaft. The third condenser with the highest internal pressure among the at least three condensers may be disposed between two of the other condensers along the rotation shaft. A second communication pipe 6B may connect the second and third condensers to guide condensed water from the second to the third condenser (Fig.2). A conductivity measuring device (50, Fig.3) which measures the conductivity of the condensed water may be provided in the first and second communication pipes.
FIG. 1
Figure GB2553882A_D0001
1/4
FIG. 1
Figure GB2553882A_D0002
ΙΑ
Figure GB2553882A_D0003
Figure GB2553882A_D0004
4Η 4Η
4L 4L
Figure GB2553882A_D0005
ΊροΓ
~^οΓ
Figure GB2553882A_D0006
Figure GB2553882A_D0007
2/4
FIG. 2
Figure GB2553882A_D0008
3/4
FIG. 3
Figure GB2553882A_D0009
4/4
FIG. 4
100^
Figure GB2553882A_D0010
TITLE OF THE INVENTION
MULTI-PRESSURE TYRE CONDENSER
BACKGROUND OF THE INVENTION
1. Field of the Invention [0001]
The present invention relates to a multi-pressure type condenser.
2. Description of the Related Art [0002]
Power generation efficiency of a power plant equipped with a steam turbine or the like is closely related to degree of vacuum of a condenser, and it is important to maintain the degree of vacuum of the condenser at a high vacuum in order to achieve high efficiency operation. The degree of vacuum of the condenser is affected by temperature of cooling water. For this reason, in a power plant or the like which is disposed in an inland area and uses a cooling tower that cools the cooling water using river or lake water as a refrigerant, in some cases, the temperature of the cooling water does not sufficiently decrease and it is difficult to maintain a high degree of vacuum.
[0003]
To solve such a problem, it is known to improve the degree of vacuum of the condenser, using a multi-pressure type condenser. In this system, in a plant in which a plurality of low-pressure steam turbines is installed, the steam chambers of a plurality of condensers disposed on the top of the low-pressure steam turbine are partitioned respectively, and each condenser is operated at different degrees of vacuum. When this system is adopted, the average degree of vacuum is improved and the plant efficiency is improved compared with a single-pressure type condenser.
[0004]
Incidentally, in the multi-pressure type condenser, the temperature of the condensed water stored in a hot well in the high-vacuum (low-pressure) condenser becomes lower than the temperature of the condensed water in the condenser of the other degree of vacuum. Condensed water discharged from the condenser is heated using a heat exchanger and sent to a boiler or a nuclear reactor. However, when the condensed water is at a low temperature, for example, the amount of extraction steam required for heating increases, which becomes a factor of lowering the efficiency of the plant. For this reason, a system in which the condensed water of the low-pressure condenser is heated with steam of a relatively high-temperature of the high-pressure condenser and is sent to the downstream side after reaching a relatively high temperature is adopted. As an example of a method of heating the condensed water, there is a method of transferring the condensed water of the low-pressure condenser to a high-pressure condenser via a communication pipe once and heating the condensed water (see, for example, Takeshi Kojima, Multistage Pressure Condenser, Thermal Power Generation, Thermoelectric Power Engineering
Association, October 1970, Vol. 21, No. 10, p. 23-27).
[0005]
In this way, in a case where the communication pipe is provided between the condensers of different internal pressures for heating the condensed water, it is necessary to provide the communication pipe with the water head corresponding to a deviation in the internal pressure. Thus, it is necessary to provide a predetermined length (height) in a vertical direction of the communication pipe. Further, it is necessary to secure the distance (height) between an outlet of the communication pipe in the high-pressure condenser and the hot well water level so that the condensed water guided to the high-pressure condenser is sufficiently heated and drips to the hot well.
[0006]
Therefore, in the multi-pressure type condenser, it is known that the height of the condenser increases as compared with the single pressure type condenser. As the height of the condenser increases, the manufacturing costs of the condenser and the building are affected. Therefore, as a countermeasure for suppressing an increase in height of the condenser, there is mentioned a multi-pressure type condenser (multi-stage pressure condenser) in which the shape of a heating portion is improved (see, for example,
JP-11-173768-A).
SUMMARY OF THE INVENTION [0009]
In general, in a large-capacity power plant having a large power generation output, it is necessary to install three or more low-pressure steam turbines in order to convert a relatively large amount of steam generated in a nuclear reactor or a boiler into power generation energy.
For this reason, for example, when a multi-pressure type condenser is adopted for three low-pressure steam turbines, three condensers of high pressure, intermediate pressure and low pressure are required.
[0010]
In such a multi-pressure type condenser, it is necessary to dispose the height of the communication pipe installation to be shifted step by step in accordance with the pressure of each condenser. Therefore, there is a problem of a further increase in height of the condenser with respect to the multi-pressure type condenser including two condensers of high pressure and low pressure.
[0011]
In response to such a problem, even if an increase in the height of the condenser is suppressed by changing the shape of the dripping portion installed in each condenser by the technique described in JP-11-173768-A, the necessity of securing the height of the communication pipe does not change. Accordingly, there is a limit in the suppression of the increase in the height of the condenser using this technique .
[0012]
The present invention has been made in view of the above-described problems, and an object thereof is to provide a multi-pressure type condenser in which the height of the condenser is suppressed in a large-scale and largecapacity power plant in which three or more condensers are installed.
[0013]
In order to solve the aforementioned problem, for example, the configuration described in the claims is adopted. The present application includes a plurality of means to solve the above issue, and an example thereof is a multi-pressure type condenser which is provided in a largecapacity power plant and operates each of three or more condensers at different degrees of vacuum, and includes: a first condenser having the lowest internal pressure among the three or more condensers; a second condenser having the second highest internal pressure after the first condenser; and a communication pipe which connects the first condenser and a condenser other than the second condenser so as to guide condensed water from the first condenser to the condenser other than the second condenser.
[0014]
According to the present invention, since it is possible to reduce the height of the communication pipe which connects the condensers of different internal pressures, it is possible to provide a multi-pressure type condenser in which the height of the condenser is suppressed in the large-scale and large-capacity power plant in which three or more condensers are installed.
BRIEF DESCRIPTION OF THE DRAWINGS [0015]
Fig. 1 is a schematic view illustrating a first embodiment of a multi-pressure type condenser of the present invention;
Fig. 2 is a schematic view illustrating a second embodiment of the multi-pressure type condenser of the present invention;
Fig. 3 is a schematic view illustrating a third embodiment of the multi-pressure type condenser of the present invention; and
Fig. 4 is a schematic view illustrating a conventional multi-pressure type condenser.
DESCRIPTION OF THE PREFERRED EMBODIMENTS [0016]
Hereinafter, embodiments of a multi-pressure type condenser of the present invention will be described with reference to the drawings.
First example [0017]
Fig. 1 is a schematic view illustrating a first embodiment of a multi-pressure type condenser of the present invention. In the present embodiment, three condensers are installed, each of which is made up of a low-pressure condenser 1, an intermediate-pressure condenser 2, and a high-pressure condenser 3 having different internal pressures (degree of vacuum).
[0018]
The low-pressure condenser 1 has a low-pressure condenser case 10 in which a low-pressure steam turbine 100 and a casing 1A are disposed in an upper part, two pairs of pipe bundles 4L which are disposed inside the low-pressure condenser case 10 and in which cooling pipes for making cooling water flow are gathered, a low-pressure hot well 5 in which the condensed water condensed by the pipe bundle 4L is stored, and a communication pipe 6A which has one end connected to the low-pressure hot well 5 and the other end connected to the high-pressure condenser 3. The condensed water accumulated in the low-pressure hot well 5 is guided to the high-pressure condenser 3 by the communication pipe 6A. The two pairs of pipe bundles 4L are disposed such that the longitudinal direction thereof is orthogonal to the axial direction of the low-pressure steam turbine 100, and are disposed at intervals in the axial direction of the lowpressure steam turbine 100, which is the transverse direction of the respective pipe bundles 4L.
[0019]
The intermediate-pressure condenser 2 includes an intermediate-pressure condenser case 20 in which a lowpressure steam turbine 200 and a casing 2A are disposed in an upper part, two pairs of pipe bundles 41 which are disposed inside the intermediate-pressure condenser case 20 and in which cooling pipes for making the cooling water flow are gathered, an intermediate-pressure hot well 8 in which the condensed water condensed by the pipe bundle 41 is stored, and a communication pipe 6B which has one end connected to the intermediate-pressure hot well 8 and the other end connected to the high-pressure condenser 3. The condensed water accumulated in the intermediate-pressure hot well 8 is guided to the high-pressure condenser 3 by the communication pipe 6B. The two pairs of pipe bundles 41 are disposed such that the longitudinal direction thereof is orthogonal to the axial direction of the low-pressure steam turbine 200, and are disposed at intervals in the axial direction of the low-pressure steam turbine 200, which is the transverse direction of the respective pipe bundles 41. Further, the intermediate-pressure condenser case 20 is disposed adjacent to the low-pressure condenser case 10.
[0020]
The high-pressure condenser 3 includes a highpressure condenser case 30 in which a low-pressure steam turbine 300 and a casing 3A are disposed in an upper part, two pairs of pipe bundles 4H which are disposed inside the high-pressure condenser case 30 and in which cooling pipes for making the cooling water flow are gathered, and a hot well 9 in which the condensed water condensed by the pipe bundle 4H is stored. The two pairs of pipe bundles 4H are disposed such that the longitudinal direction thereof is orthogonal to the axial direction of the low-pressure steam turbine 300, and are disposed at intervals in the axial direction of the low-pressure steam turbine 300, which is the transverse direction of the respective pipe bundles 4H. Further, the high-pressure condenser case 30 is disposed adjacent to the intermediate-pressure condenser case 20 on the opposite side of the low-pressure condenser case 10 with the intermediate-pressure condenser case 20 interposed therebetween. Therefore, the high-pressure condenser case 30 and the low-pressure condenser case 10 are disposed on the end side in the arrangement of the condenser cases, and the intermediate-pressure condenser case 20 is disposed at a position other than the end side (on the intermediate side in the present embodiment). Further, the respective lowpressure steam turbines 100, 200 and 300 disposed in the upper part of the respective condensers 1, 2 and 3 are connected to each other in the axial direction by the same rotation shaft (not illustrated) in this order.
[0021]
Since the internal pressure of the high-pressure condenser 3 is higher than the internal pressures of the low-pressure condenser 1 and the intermediate-pressure condenser 2, the height of the outlets provided on the other end side of the communication pipes 6A and 6B is set to be lower than the water level of the low-pressure hot well 5 or the intermediate-pressure hot well 8, respectively, by the water head. Specifically, as illustrated in Fig. 1, when a difference between the height of the water level of the lowpressure hot well 5 and the height of the water level of the intermediate-pressure hot well 8 is defined as hl, a difference between the height of the water level of the intermediate-pressure hot well 8 and the height of the outlets provided on the other end side of the communication pipes 6A and 6B is defined as h2, and a difference between the height of the water level of the hot well 9 and the height of the outlets provided on the other end side of the communication pipes 6A and 6B is set as h3, the outlet height of the communication pipe 6A is set to be lower than the water level height of the low-pressure hot well 5 by (hl + h2) which is the water head. Similarly, the height of the outlet of the communication pipe 6B is set to be lower than the water level height of the intermediate-pressure hot well 8 by (h2) which is the water head.
[0022]
Dripping portions 7A and 7B are provided at the outlets of the communication pipes 6A and 6B, respectively so that the low-temperature condensed water guided from the low-pressure hot well 5 or the intermediate-pressure hot well 8 is heated from the relatively high-temperature steam of the high-pressure condenser 3.
[0023]
The dripping portions 7A and 7B may include a distribution tray which distributes the condensed water, and a heating tray which heats the condensed water. The condensed water heated by the dripping portions 7A and 7B and the condensed water generated in the high-pressure condenser 3 are accumulated in the hot well 9 and are discharged from the condenser outlet 11. In order to reliably perform heating at the dripping portion, it is necessary to secure an appropriate height between the dripping portions 7A and 7B and the water level of the hot well 9. In the present embodiment, the height is defined as h3.
[0024]
Next, in order to facilitate understanding of the effect of the embodiment of the present invention, a conventional multi-pressure type condenser will be described with reference to Fig. 4. Fig. 4 is a schematic view illustrating a conventional multi-pressure type condenser.
In Fig. 4, the same reference numerals as those illustrated in Fig. 1 denote the same parts, and a detailed description thereof will not be provided.
[0025]
The conventional multi-pressure type condenser illustrated in Fig. 4 includes devices substantially similar to the above-described multi-pressure type condenser of the present embodiment, but connection of the communication pipe and the outlet height thereof are different.
One end side of a communication pipe 6C is connected to the low-pressure hot well 5 of a low-pressure condenser case 10', and the other end side thereof is connected to the intermediate-pressure condenser 2. The condensed water accumulated in the low-pressure hot well 5 is guided to the intermediate-pressure condenser 2 by the communication pipe 6C. Since the internal pressure of the intermediatepressure condenser 2 is higher than the internal pressure of the low-pressure condenser 1, the outlet height of the communication pipe 6C is set to be lower than the water level of the low-pressure hot well 5 by (h4) which is the water head. A dripping portion 7C is provided at the outlet of the communication pipe 6C so that the low-temperature condensed water guided from the low-pressure hot well 5 is heated by the relatively high-temperature steam of the intermediate-pressure condenser 2. The condensed water heated in the dripping portion 7C and the condensed water generated in the intermediate-pressure condenser 2 are accumulated in the intermediate-pressure hot well 8. An appropriate height h5 is secured between the water levels of the dripping portion 7C and the intermediate-pressure hot well 8 so as to reliably perform heating at the dripping portion 7C.
[0026]
One end side of a communication pipe 6D is connected to the intermediate-pressure hot well 8 of an intermediatepressure condenser case 20', and the other end side thereof is connected to a high-pressure condenser case 30' of the high-pressure condenser 3. Similarly, after the condensed water accumulated in the intermediate-pressure hot well 8 passes through a dripping portion 7D installed in the condenser via the communication pipe 6D, the condensed water is accumulated in the hot well 9 and is discharged from the condenser outlet 11. The outlet height of the communication pipe 6D is set to be lower than the water level of the intermediate-pressure hot well 8 by (h6) which is a water head. An appropriate height h7 is secured between the water levels of the dripping portion 7D and the hot well 9.
[0027]
As described above, in the conventional multipressure type condenser, the communication pipes 6C, 6D and the dripping portions 7C and 7D in which the water head is secured are provided in the intermediate-pressure condenser 2 and the high-pressure condenser 3, respectively.
Accordingly, there was a problem that it is necessary to increase the height of the condenser compared with the plant having the two condensers.
[0028]
According to the present embodiment, a large-scale and large-capacity power plant in which three or more condensers are installed is equipped with a multi-pressure type condenser disposed so that a communication pipe that guides the condensed water of the condenser with the lowest internal pressure of the condenser is connected to the condenser other than the condenser with the second highest internal pressure after the condenser with the lowest internal pressure, and thus it is possible to suppress the height of the condenser.
[0029]
Comparing Fig. 4 illustrating a conventional multipressure type condenser with Fig. 1 illustrating a multipressure type condenser of the present embodiment, in the present embodiment, the communication pipe 6A connected to the low-pressure hot well 5 is guided to the high-pressure condenser 3. However, the conventional example differs in that the communication pipe 6C connected to the low-pressure hot well 5 is guided to the intermediate-pressure condenser
2. In the present embodiment, since there is no need to secure a height (h5) necessary for heating between the dripping portion 7C and the intermediate-pressure hot well 8 provided in the conventional intermediate-pressure condenser 2 illustrated in Fig. 4, it is possible to reduce the condenser height.
[0030]
According to the above-described first embodiment of the multi-pressure type condenser of the present invention, since it is possible to reduce the height of the communication pipe which connects the condensers having different internal pressures, it is possible to provide a multi-pressure type condenser in which the height of the condenser in a large-scale and large-capacity power plant having three or more condensers is suppressed. As a result, since it is possible to suppress an increase in the manufacturing costs of the condenser and the building, the productivity of the large-scale (large-capacity) power plant is improved.
Second example [0031]
Hereinafter, a second embodiment of the multipressure type condenser of the present invention will be described with reference to the drawings. Fig. 2 is a schematic view illustrating the second embodiment of the multi-pressure type condenser of the present invention. In Fig. 2, the same reference numerals as those illustrated in Figs. 1 and 4 denote the same parts, and a detailed description thereof will not be provided.
[0032]
The second embodiment of the multi-pressure type condenser of the present invention illustrated in Fig. 2 is constituted by devices similar to those of the first embodiment, except for the following configuration. The present embodiment differs in that, in the arrangement of the condenser case, the high-pressure condenser case 30 is disposed adjacent to the low-pressure condenser case 10, and the intermediate-pressure condenser case 20 is disposed on the opposite side of the low-pressure condenser case 10 with the high-pressure condenser case 30 interposed therebetween.
[0033]
Compared to the first embodiment, the position of the intermediate-pressure condenser 2 and the position of the high-pressure condenser 3 are reversed. In the present embodiment, the high-pressure condenser 3, which is the condenser with the highest internal pressure of the condenser, is disposed at a position other than the end side (intermediate side in the present embodiment). With this configuration, it is possible to reduce the horizontal length of the communication pipe 6A connected to the lowpressure hot well 5 as compared with the first embodiment.
[0034]
According to the above-described second embodiment of the multi-pressure type condenser of the present invention, the same effect as that of the first embodiment can be obtained.
[0035]
Further, according to the above-described second embodiment of the multi-pressure type condenser of the present invention, since it is possible to reduce the length of the communication pipe which connects the low-pressure condenser and the high-pressure condenser, it is possible to suppress an increase in manufacturing cost of the condenser.
Third example [0036]
Hereinafter, a third embodiment of the multi-pressure type condenser of the present invention will be described with reference to the drawings. Fig. 3 is a schematic view illustrating the third embodiment of the multi-pressure type condenser of the present invention. In Fig. 3, the same reference numerals as those illustrated in Figs. 1 and 2 denote the same parts, and a detailed description thereof will not be provided.
[0037]
The third embodiment of the multi-pressure type condenser of the present invention illustrated in Fig. 3 includes devices similar to those of the second embodiment, except for the following configuration. The present embodiment differs in that partition plates 12L, 121, and
12H are provided at the center of the low-pressure hot well 5, the intermediate-pressure hot well 8, and the hot well 9, respectively, and a conductivity measuring device capable of measuring the conductivity of the condensed water stored in the parts of the respective hot wells 5, 8, and 9 partitioned by the partition plates is provided.
[0038]
In the low-pressure condenser 1, the two pairs of pipe bundles 4L are disposed such that the longitudinal direction thereof is orthogonal to the axial direction of the low-pressure steam turbine 100, and are arranged in parallel at intervals in the axial direction of the lowpressure steam turbine 100, which is the transverse direction of the pipe bundles 4L. The partition plate 12L is disposed so as to partition the low-pressure hot well 5 in the axial direction of the low-pressure steam turbine 100 As a result, since the condensed water dripping from each pipe bundle 4L is separated, the condensed water is not mixed in the low-pressure hot well 5.
[0039]
One end sides of separate communication pipes 6A1 and
6A2 are connected to one side and the other side of the lowpressure hot well 5 partitioned by the partition plate 12L, respectively. The other end sides of the communication pipes 6A1 and 6A2 are disposed in the lower side and connected to each other as a single communication pipe 6A to guide the mixed condensed water to the high-pressure condenser 3. Separate conductivity measuring devices 50 are provided in the communication pipe 6A1 and the communication pipe 6A2, respectively.
[0040]
In the intermediate-pressure condenser 2, the two pairs of pipe bundles 41 are disposed such that the longitudinal direction thereof is orthogonal to the axial direction of the low-pressure steam turbine 200, and are arranged in parallel at intervals in the axial direction of the low-pressure steam turbine 200, which is the transverse direction of the respective pipe bundles 41. The partition plate 121 is disposed so as to partition the intermediatepressure hot well 8 in the axial direction of the lowpressure steam turbine 200. As a result, since the condensed water dripping from the respective pipe bundles 41 is separated, the condensed water is not mixed in the intermediate-pressure hot well 8.
[0041]
One end sides of separate communication pipes 6B1 and
6B2 are connected to one side and the other side of the intermediate-pressure hot well 8 partitioned by the partition plate 121, respectively. The other end sides of the communication pipes 6B1 and 6B2 are disposed in the lower side and connected to each other as a single communication pipe 6B to guide the mixed condensed water to the high-pressure condenser 3. Separate conductivity measuring devices 50 are provided in the communication pipe 6B1 and the communication pipe 6B2, respectively.
[0042]
In the high-pressure condenser 3, the two pairs of pipe bundles 4H are disposed such that the longitudinal direction thereof is orthogonal to the axial direction of the low-pressure steam turbine 300, and are arranged in parallel at intervals in the axial direction of the lowpressure steam turbine 300, which is the transverse direction of the respective pipe bundles 4H. The partition plate 12H is disposed so as to partition the hot well 9 in the axial direction of the low-pressure steam turbine 300.
As a result, since the condensed water dripping from each of the pipe bundles 4H is separated, the condensed water is not mixed in the hot well 9. Separate conductivity measuring devices 50 are provided on one side and the other side of the hot well 9 partitioned by the partition plate 12H, respectively.
[0043]
In the present embodiment, condensed water dripping from a total of six pipe bundles 4L, 41, and 4H of the multi-pressure type condenser can be individually stored in each hot well, and the conductivity can be separately measured. Therefore, for example, there is an effect capable of easily specifying the leakage location of the cooling pipe forming the pipe bundles.
[0044]
Specifically, for example, when the cooling pipe forming the pipe bundle breaks and the sea water as the cooling water leaks, the salt content in the condensed water accumulated in the hot well rises and the electricity easily flows. Accordingly, the conductivity rises. Therefore, by monitoring the conductivity, it is possible to detect the leakage of the cooling water and the leakage location at an early stage.
[0045]
According to the above-described third embodiment of the multi-pressure type condenser of the present invention, the same effect as the first embodiment can be obtained.
[0046]
Further, according to the above-described third embodiment of the multi-pressure type condenser of the present invention, it is possible easily specify the leakage location of the cooling pipe forming the pipe bundles.
[0047]
Further, although the present invention has been described by taking as an example of a case where the three condensers made up of the low-pressure condenser 1, the intermediate-pressure condenser 2 and the high-pressure condenser 3 are provided as a multi-pressure type condenser, the invention is not limited thereto. Three or more condensers may be used.
[0048]
Further, the present invention is not limited to the above-described first to third embodiments, but various modified examples are included. The above-described embodiments have been described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. For example, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Further, it is also possible to add, delete, and replace other configurations with respect to part of the configuration of each embodiment.

Claims (4)

What is claimed is:
1. A multi-pressure type condenser which is provided in a large-capacity power plant and operates each of three or more condensers at different degrees of vacuum, the multi-pressure type condenser comprising:
a first condenser having the lowest internal pressure among the three or more condensers;
a second condenser having the second highest internal pressure after the first condenser; and a communication pipe which connects the first condenser and a condenser other than the second condenser so as to guide condensed water from the first condenser to the condenser other than the second condenser.
2. The multi-pressure type condenser according to claim 1, wherein separate low-pressure steam turbines connected to each other by the same rotation shaft are disposed in an upper part of the three or more condensers, respectively, and a third condenser with the highest internal pressure among the three or more condensers is disposed at a position other than an end portion of the low-pressure steam turbine in an axial direction.
3. The multi-pressure type condenser according to claim 1, further comprising:
another communication pipe which connects the second condenser and a condenser other than the first condenser so as to guide condensed water from the second condenser to the condenser other than the first condenser.
4. The multi-pressure type condenser according to claim 3, wherein a conductivity measuring device which measures the conductivity of the condensed water is provided in the communication pipe and the other communication pipe.
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GB 1709083.8 1-4
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5335304A (en) * 1976-09-13 1978-04-01 Nippon Telegr & Teleph Corp <Ntt> Information system of facsimile communication result
US4598767A (en) * 1983-06-09 1986-07-08 Abdel Saleh Multiple pressure condenser for steam turbines, with heating devices for suppressing condensate overcooling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935106C2 (en) * 1979-08-30 1983-09-29 Kraftwerk Union AG, 4330 Mülheim Control device for the amount of condensate in condensers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5335304A (en) * 1976-09-13 1978-04-01 Nippon Telegr & Teleph Corp <Ntt> Information system of facsimile communication result
US4598767A (en) * 1983-06-09 1986-07-08 Abdel Saleh Multiple pressure condenser for steam turbines, with heating devices for suppressing condensate overcooling

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