Condenser leak monitoring system and monitoring method

Abstract

To properly and quickly detect a tube leak of a condenser.SOLUTION: A condenser leak monitoring system comprises an electric conductivity measurement apparatus 2 for measuring electric conductivity at a plurality of measurement points including an outlet of a condensate pump, a PI server 4 for providing monitoring information including the electric conductivity at the plurality of measurement points on the basis of a measurement result by the electronic conductivity measurement apparatus 2, and a user terminal 6 for indicating the monitoring information which is provided from the PI server 4. When the electric conductivity of a prescribed measurement point out of the plurality of measurement points is higher than a prescribed value at a prescribed activation stage at which power generation equipment is activated, the PI server 4 provides alarm information as the monitoring information.SELECTED DRAWING: Figure 1

Description

Technical Field

[0005]

[0001] The present invention relates to a condenser leak monitoring system and a monitoring method for monitoring tube leaks in a condenser.

Background Art

[0002] In a power generation facility that rotates a turbine with steam generated in a boiler to generate electricity, the steam after passing through the turbine is condensed in a condenser and recycled, and seawater is used as a cooling medium for cooling the steam in the condenser. Some of these condensers have tubes for passing seawater piped, and when the tubes are damaged due to aging or the like, seawater may leak (tube leak) from the tubes into the condenser. And when a tube leak occurs, there is a risk that magnesium in seawater will adhere to the boiler and turbine and cause damage, so it is necessary to detect the tube leak early and respond early.

[0003] On the other hand, since the conductivity (electrical conductivity) of the condensed water increases when seawater is mixed into the condensed water, a technique for detecting seawater leakage and tube leaks by monitoring the conductivity of the condensed water is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Furthermore, when restarting power generation equipment after it has been shut down, the quality of the condensate can change, sometimes causing a temporary increase in conductivity. It was difficult to determine whether this increase in conductivity was due to a tube leak or a temporary increase in conductivity (normal behavior). This not only required time and effort to make a judgment, but also carried the risk of misjudgment, potentially leading to delays in addressing tube leaks.

[0006] Therefore, the present invention aims to provide a condenser leak monitoring system and monitoring method that can properly and promptly detect condenser tube leaks. [Means for solving the problem]

[0007] To solve the above problems, the invention of claim 1 is: A condenser leak monitoring system for a power generation facility that generates electricity by rotating a turbine with steam produced in a heat recovery boiler, and condenses the steam after it has passed through the turbine in a condenser, wherein the system monitors tube leaks in the condenser, The power generation equipment includes a conductivity measuring means for measuring conductivity at multiple measurement points including the condensate pump outlet, an information providing means for providing monitoring information to an external party, including the conductivity of the multiple measurement points, based on the measurement results from the conductivity measuring means, and an information display terminal for displaying the monitoring information provided by the information providing means, wherein the information providing means includes alarm information as monitoring information when the conductivity of a predetermined measurement point among the multiple measurement points is higher than a predetermined value at a predetermined startup stage when the power generation equipment is started up. fruit , The measurement locations are peripheral equipment other than the condenser, including the condensate pump outlet, low-pressure feedwater pump inlet, low-pressure drum water, medium-pressure drum water, high-pressure drum water, low-pressure outlet steam, medium-pressure outlet steam, and high-pressure saturated steam, and for each type of startup of the power generation equipment, including cold startup, at least one of the predetermined startup stage, predetermined measurement locations, and predetermined values ​​is set. It is characterized by the following:

[0009] Claim 2 The invention is claimed 1 In the condenser leak monitoring system described above, if the type of startup of the power generation equipment is a cold start, the predetermined startup stage is The aforementioned When starting up the waste heat recovery boiler, the predetermined measurement points are The aforementioned Condensate pump outlet and The aforementioned It is characterized by being set at the inlet of the low-pressure water supply pump.

[0010] Claim 3 The invention is as follows: 2The condenser leak monitoring system described above is characterized in that, in the normal operating state after the start-up of the power generation equipment, if the conductivity of a predetermined measurement point among the plurality of measurement points is higher than a predetermined value, the monitoring information includes alarm information.

[0011] Claim 4 The invention is A method for monitoring tube leaks in a condenser in a power generation facility that generates electricity by rotating a turbine with steam produced in a heat recovery boiler and condenses the steam after it has passed through the turbine in a condenser, wherein the method monitors tube leaks in the condenser, The system includes a conductivity measurement step of measuring conductivity at multiple measurement points, including the condensate pump outlet, and an information provision step of providing monitoring information to an external party, including the conductivity of the multiple measurement points, based on the measurement results in the conductivity measurement step, wherein the information provision step includes alarm information as monitoring information if, at a predetermined startup stage when the power generation equipment is started up, the conductivity of a predetermined measurement point among the multiple measurement points is higher than a predetermined value. fruit , The measurement locations are peripheral equipment other than the condenser, including the condensate pump outlet, low-pressure feedwater pump inlet, low-pressure drum water, medium-pressure drum water, high-pressure drum water, low-pressure outlet steam, medium-pressure outlet steam, and high-pressure saturated steam. For each type of startup of the power generation equipment, including cold startup, at least one of the predetermined startup stage, predetermined measurement locations, and predetermined values ​​is set. It is characterized by the following:

[0013] Claim 5 The invention is claimed 4 In the condenser leak monitoring method described above, if the type of startup of the power generation equipment is a cold start, the predetermined startup step is The aforementioned To start up the waste heat recovery boiler, the predetermined measurement points are The aforementioned Condensate pump outlet and The aforementioned It is characterized by being set at the inlet of a low-pressure water supply pump.

[0014] Claim 6 The invention is claimed 4 ~ 5 The condenser leak monitoring method described above is characterized in that, in the normal operating state after the start-up of the power generation equipment, if the conductivity of a predetermined measurement point among the plurality of measurement points is higher than a predetermined value, the monitoring information includes alarm information. [Effects of the Invention]

[0015] Based on the inventor's experience and verification, it has been confirmed that if the conductivity at a specific location is higher than a predetermined value at a certain startup stage / timing when the power generation equipment is started from a stopped state, there is a high probability that a tube leak is occurring. And, claim 1 and4 According to the invention described in [reference], when the power generation facility is started and at a predetermined start-up stage, if the conductivity at a predetermined measurement location is higher than a predetermined value, it is highly likely that a tube leak has occurred, and warning information is provided and displayed on an external information display terminal. Therefore, it becomes possible to appropriately and early detect and discover tube leaks and water quality abnormalities, and it becomes possible to prevent secondary damage (for example, seawater mixing into the steam turbine side) due to delayed discovery. In addition, it becomes possible to reduce the labor and costs required to discover tube leaks and water quality abnormalities.

[0016] Claim 1 and 4 According to the invention described in [reference], for each type of start-up of the power generation facility, at least one of a predetermined start-up stage, a predetermined measurement location, and a predetermined value is set. That is, depending on the type of start-up of the power generation facility, it is set at which start-up stage the presence or absence of a tube leak should be determined, at which measurement location it should be determined, and at what threshold value it should be determined. Therefore, it becomes possible to appropriately determine the possibility of the occurrence of a tube leak based on appropriate judgment elements. That is, it becomes possible to appropriately and early detect and discover tube leaks and water quality abnormalities.

[0017] Also, according to the experience and verification of the inventor of the present application, when the power generation facility is cold-started, if the conductivity at the outlet of the condensate pump and the inlet of the low-pressure feed water pump is higher than a predetermined value at the stage when the exhaust heat recovery boiler is started, it has been confirmed that there is a high possibility that a tube leak has occurred. And according to the invention described in claim 2 and 5 when the type of start-up of the power generation facility is cold start, the predetermined start-up stage is set to the start-up of the exhaust heat recovery boiler, and the predetermined measurement locations are set to the outlet of the condensate pump and the inlet of the low-pressure feed water pump. Therefore, it becomes possible to appropriately determine the possibility of the occurrence of a tube leak. That is, it becomes possible to appropriately and early detect and discover tube leaks and water quality abnormalities.

[0018] Furthermore, according to the experience and verification of the inventor of the present application, when the startup of the power generation facility is completed and it is in the normal operation state, if the conductivity at a specific location is higher than a predetermined value, it is confirmed that there is a high possibility of a tube leak occurring. And Claims 3 and 6 According to the invention described in, when in the normal operation state and the conductivity at a predetermined measurement location is higher than a predetermined value, it is determined that there is a high possibility of a tube leak occurring, and warning information is provided and displayed on an external information display terminal. Therefore, even in the normal operation state, it is possible to appropriately and early detect and discover tube leaks and water quality abnormalities.

Brief Description of the Drawings

[0019] [Figure 1] It is a schematic configuration diagram showing a condenser leak monitoring system according to an embodiment of this invention. [Figure 2] It is an explanatory diagram of a monitoring information screen displayed on the user terminal of the condenser leak monitoring system in FIG. 1. [Figure 3] It is a diagram of a monitoring information screen displayed on the user terminal of the condenser leak monitoring system in FIG. 1 at the "sea - condensate system startup" stage during normal cold startup. [Figure 4] It is a diagram of a monitoring information screen displayed on the user terminal of the condenser leak monitoring system in FIG. 1 at the "vacuum rise" stage during normal cold startup. [Figure 5] It is a diagram of a monitoring information screen displayed on the user terminal of the condenser leak monitoring system in FIG. 1 at the "waste heat recovery boiler startup" stage during normal cold startup. [Figure 6] It is a diagram of a monitoring information screen displayed on the user terminal of the condenser leak monitoring system in FIG. 1 at the "sea - condensate system startup" stage when there is a condenser tube leak during cold startup. [Figure 7] It is a diagram of a monitoring information screen displayed on the user terminal of the condenser leak monitoring system in FIG. 1 at the "vacuum rise" stage when there is a condenser tube leak during cold startup. [Figure 8]This diagram shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1 during the "heat recovery boiler startup" phase when a condenser tube leak occurs during a cold start. [Figure 9] This figure shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1, under normal operating conditions. [Figure 10] This figure shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1, during the first stage of a condenser tube leak while the system is operating normally. [Figure 11] This figure shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1, during the second stage of a condenser tube leak while the system is operating normally. [Figure 12] This figure shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1, during the third stage of a condenser tube leak while the system is operating normally. [Figure 13] This figure shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1, during the fourth stage of a condenser tube leak while the system is operating normally. [Figure 14] This figure shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1, during the fifth stage of a condenser tube leak while the system is operating normally. [Figure 15] This figure shows the monitoring information screen displayed on the user terminal of the condenser leak monitoring system shown in Figure 1, during the sixth stage of a condenser tube leak while the system is operating normally. [Modes for carrying out the invention]

[0020] The present invention will be described below based on the illustrated embodiments.

[0021] Figure 1 is a schematic diagram showing a condenser leak monitoring system 1 according to an embodiment of the present invention. This condenser leak monitoring system 1 is a system for monitoring tube leaks in a condenser in a power generation facility P, and mainly comprises a conductivity measuring instrument (conductivity measuring means) 2, a unit computer 3, a PI server (information providing means) 4, a first monitor 5, and a user terminal (information display terminal) 6.

[0022] Here, the power generation facility P is a thermal power plant or nuclear power plant that generates electricity by producing steam in a boiler and using that steam to rotate a turbine. The steam that has passed through the turbine is condensed in a condenser, and seawater is used as a cooling medium to cool the steam in the condenser. In addition, tubes for passing seawater are piped into the condenser.

[0023] Conductivity measuring instrument 2 is an instrument that measures conductivity (electrical conductivity) at multiple measurement points, including the condensate pump outlet. Specifically, it is installed at measurement points (peripheral equipment locations other than the condenser) such as the condensate pump outlet, low-pressure feedwater pump inlet, low-pressure drum water, medium-pressure drum water, high-pressure drum water, low-pressure outlet steam, medium-pressure outlet steam, and high-pressure saturated steam, and measures conductivity at these measurement points.

[0024] Unit computer 3 is a computer that collects operational data such as conductivity measured by each conductivity meter 2. In other words, it is connected to each conductivity meter 2 via communication and receives the conductivity measured by each conductivity meter 2 in real time, thereby collecting and storing the conductivity at each measurement point in real time. Here, pH values ​​(operational data) are measured at pH measurement points such as low-pressure drums, medium-pressure drums, and high-pressure drums, and each measured pH value is also transmitted to unit computer 3 in real time and stored.

[0025] Furthermore, the unit computer 3 is configured to output an alarm if, under certain conditions, the conductivity at the low-pressure feedwater pump inlet exceeds a predetermined threshold. In other words, as will be described later, in this embodiment, if the conductivity at the low-pressure feedwater pump inlet exceeds a predetermined value / threshold during startup of the power generation equipment P and during normal operation thereafter, an alarm is output indicating a suspected tube leak in the condenser.

[0026] The first monitor 5 is a display capable of showing conductivity, pH value, and other data collected and stored by the unit computer 3, and in this embodiment, it is installed in the central control room of the power plant. Furthermore, when an alarm is output from the unit computer 3 as described above, alarm information indicating that the conductivity at the low-pressure feedwater pump inlet has exceeded a predetermined threshold is displayed on the first monitor 5, or an alarm sound is emitted.

[0027] The PI server 4 is a server that provides external monitoring information, including conductivity at multiple measurement points, based on the measurement results from each conductivity meter 2. Specifically, it receives and collects operating data, including conductivity and PH values, from the unit computer 3 and stores it, and provides predetermined data (data specified and set in advance) from the operating data so that it can be visualized externally, i.e., on a user terminal 6. Furthermore, as will be described later, the monitoring information includes alarm information, and when a predetermined alarm condition is reached, the alarm information is sent to the user terminal 6 and displayed on the user terminal 6.

[0028] User terminal 6 is a computer that displays monitoring information provided by PI server 4, and can acquire and display monitoring information by accessing PI server 4. A second monitor 61 is also connected, and the monitoring information is displayed prominently on the second monitor 61 as well. The format and form of the monitoring information to be displayed can be configured by user terminal 6 or PI server 4, and in this embodiment, it is displayed on a monitoring information screen as described later. Furthermore, multiple such user terminals 6 can access PI server 4 simultaneously to acquire and display monitoring information, and can also access PI server 4 from anywhere.

[0029] Next, we will explain the specific contents of the monitoring information that the PI server 4 provides to the user terminal 6.

[0030] First, the monitoring information provided by the PI server 4 is displayed on the user terminal 6 as a monitoring information screen as shown in Figure 2. Specifically, the first section SC1 of the monitoring information screen displays and presents the startup mode (type of startup), which includes VH (very hot startup), H (hot startup), W1 (warm startup 1), W2 (warm startup 2), and C (cold startup). The second section SC2 displays and presents the startup stage during startup of the power generation equipment P, as well as the equipment status, such as whether the power generation equipment P is in a normal operating state or in a vacuum holding stop state. Here, the startup stages (breakpoints) include the "sea / condensate system startup" stage, the "vacuum rise" stage, and the "HRSG (heat recovery steam generator) startup" stage.

[0031] The third section, SC3, displays and presents water quality data such as conductivity and pH values ​​at each measurement point in a time-series graph. The fourth section, SC4, displays and presents alarm information, which will be described later. The fifth section, SC5, displays the time interval for displaying the water quality data (for example, 1d = 24 hours), and the time interval can be adjusted by clicking the right and left arrows on either side. Based on this time interval, the start time on the screen is displayed in the lower left of the monitoring information screen, and the latest time on the screen is displayed in the lower right of the same screen. The sixth section, SC6, displays and presents the conductivity of the condensate pump outlet.

[0032] Furthermore, the PI server 4 outputs an alarm to the external user terminal 6 in the following cases. Here, based on the inventor's experience and verification, it has been confirmed that if the conductivity at a specific location is higher than a predetermined value at a certain startup stage / timing when the power generation equipment P is started from a stopped state, there is a high probability that a tube leak is occurring. Also, when the power generation equipment P is cold-started, it has been confirmed that if the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet is higher than a predetermined value when the waste heat recovery boiler is started, there is a high probability that a tube leak is occurring. Moreover, when the power generation equipment P has finished starting up and is in a normal operating state, it has been confirmed that if the conductivity at a specific location is higher than a predetermined value, there is a high probability that a tube leak is occurring. For this reason, an alarm is output in the following cases.

[0033] First, when the power generation equipment P is started up and at a predetermined startup stage, if the conductivity at a predetermined measurement point among multiple measurement points is higher than a predetermined value, alarm information is included as monitoring information. In other words, generally when the power generation equipment P is started up, the conductivity at the predetermined measurement point temporarily rises initially, but if it remains higher than the predetermined value even at the predetermined startup stage, alarm information is provided (alarm output) on the suspicion of a condenser tube leak.

[0034] Here, it is possible to detect suspected tube leaks in any startup mode and startup stage, and for each startup mode of the power generation equipment P, at least one of the following is set: a predetermined startup stage, a predetermined measurement location, and a predetermined value. In other words, depending on the startup mode of the power generation equipment P, it is set at which startup stage the presence or absence of a tube leak should be judged, at which measurement location the judgment should be made, and at what threshold the judgment should be made. These predetermined startup stage, predetermined measurement location, and predetermined value, which are the requirements and timing for outputting an alarm, are determined and set based on past performance (conditions and data during normal operation and when a tube leak occurs) so that tube leaks in the condenser can be properly judged and detected. In addition, predetermined values ​​are set for each predetermined startup stage and predetermined measurement location, and furthermore, there may be one or more predetermined measurement locations.

[0035] Specifically, in this embodiment, when the startup mode is cold startup, an alarm is output if the condensate pump outlet and the low-pressure feedwater pump inlet, which are predetermined measurement points, are higher than predetermined values ​​during the startup phase of the waste heat recovery boiler, which is a predetermined startup phase. The reason for designating the condensate pump outlet and the low-pressure feedwater pump inlet as predetermined measurement points is to prevent false detection of tube leaks in the event of abnormal measurements by the conductivity meter 2 (for example, if the conductivity rises due to improper flow of sample water), and to improve reliability by determining and detecting tube leaks based on the conductivity of the two nearest locations.

[0036] In other words, if the power generation equipment P is cold-started after being shut down for a long period, the water quality deteriorates due to the long-term shutdown. Therefore, even under normal conditions without condenser tube leaks, as shown in Figure 3, the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet becomes high during the initial "sea / condensate system startup" phase. Then, under normal conditions without condenser tube leaks, as shown in Figure 4, the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet decreases during the subsequent "vacuum rise" phase. Furthermore, as shown in Figure 5, the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet becomes below a predetermined value / threshold by the subsequent "HRSG startup" phase. In addition, during the startup phase following the "HRSG startup" phase, the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet also becomes below a predetermined value / threshold.

[0037] In contrast, if there is a condenser tube leak, as shown in Figure 6, during the initial "sea / condenser system startup" phase, the conductivity at the condenser pump outlet and the low-pressure feedwater pump inlet will be high, similar to the normal operation described above. In Figure 6, the conductivity at the condenser pump outlet is so high that it exceeds the range / indicator value. In the subsequent "vacuum rise" phase, as shown in Figure 7, the conductivity at the condenser pump outlet and the low-pressure feedwater pump inlet is also high (both exceeding the range in Figure 7), but because the vacuum is rising, it is not possible to determine whether the high conductivity is due to water quality deterioration due to long-term shutdown or due to a condenser tube leak. Therefore, observation is required.

[0038] Furthermore, as shown in Figure 8, even during the "HRSG startup" phase, the conductivity of the condensate pump outlet and the low-pressure feedwater pump inlet remains higher than the predetermined value / threshold (both are maxed out in Figure 8). In other words, under normal conditions without condenser tube leaks, the conductivity of the condensate pump outlet and the low-pressure feedwater pump inlet should have decreased to below the predetermined value / threshold by the "HRSG startup" phase. However, since it has not decreased even during the "HRSG startup" phase, an alarm is issued due to suspected condenser tube leaks (seawater contamination). Specifically, in this embodiment, the fourth section SC4, labeled "Suspected Condenser Tube Leak," is illuminated in red, but other methods may be used to output the alarm.

[0039] Furthermore, if there is a condenser tube leak, the conductivity of the condensate pump outlet and the low-pressure feedwater pump inlet will continue to be higher than the predetermined value / threshold even in the startup phase following the "HRSG startup" phase (from "GT (gas turbine) startup" onwards), so the alarm output ("Suspected Condenser Tube Leak" indicator) will continue to light up. In addition, in the startup phase following the "HRSG startup" phase (for example, from "ST (steam turbine) startup" onwards), the conductivity of the medium-pressure drum water and high-pressure drum water may also increase due to seawater contamination.

[0040] Next, during normal operation after the power generation equipment P has started up, if the conductivity at a predetermined measurement point among multiple measurement points is higher than a predetermined value, alarm information is included as monitoring information. That is, monitoring continues even after startup is complete and normal operation has begun, and if the conductivity at the predetermined measurement point is higher than a predetermined value, alarm information is provided indicating a suspected condenser tube leak. In this case, depending on the type of power generation equipment P and operating conditions, the predetermined measurement point (second predetermined measurement point), predetermined value (second predetermined value), and alarm information (second alarm information) may be the same as, or different from, the predetermined measurement point, predetermined value, and alarm information at the time of startup of the power generation equipment P described above. Furthermore, there may be multiple predetermined measurement points.

[0041] Specifically, in this embodiment, the conductivity of the condensate pump outlet and the low-pressure feedwater pump inlet is monitored as predetermined measurement points. That is, under normal conditions where there is no tube leak in the condenser, the conductivity of the condensate pump outlet and the low-pressure feedwater pump inlet is stable at or below a predetermined value / threshold, as shown in Figure 9.

[0042] In contrast, in the event of a condenser tube leak, initially, as shown in Figure 10, the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet is below a predetermined value / threshold. However, due to the condenser tube leak (seawater ingress), the conductivity at the condensate pump outlet gradually increases thereafter, for example, as shown in Figure 11, and continues to increase thereafter, as shown in Figure 12.

[0043] Then, as shown in Figure 13, the conductivity at the condensate pump outlet becomes higher than a predetermined value / threshold, and at this point there is suspicion of a condenser tube leak (seawater contamination), but there is also a possibility of instrument malfunction, so an alarm is output simply for high conductivity. Specifically, in this embodiment, the fourth section SC4, which is labeled "Suspected Condenser Tube Leak," is not lit, and the sixth section SC6, which is labeled with the conductivity value, is flashed red, but an alarm output may be output by other methods. Also at this point, the conductivity at the low-pressure feedwater pump inlet also begins to gradually increase.

[0044] Next, as shown in Figure 14, if the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet continues to rise, and as shown in Figure 15, the conductivity at the low-pressure feedwater pump inlet also exceeds a predetermined value / threshold, the fourth section SC4, labeled "Suspected Condenser Tube Leak," will light up red. At the same time, the unit computer 3 will output an alarm. The alarm method can be anything, but for example, it may be displayed on the first monitor 5 or an alarm sound may be output from the first monitor 5.

[0045] In this embodiment, as described above, when the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet exceeds a predetermined value / threshold, an alarm is output on the monitoring information screen of the user terminal 6 and the second monitor 61 (the fourth section SC4 is lit red). However, alarms may also be output under other conditions. For example, as shown in Figure 14, an alarm may be output on the monitoring information screen when the conductivity at the condensate pump outlet exceeds a predetermined value / threshold, and the conductivity at the low-pressure feedwater pump inlet is rising at a predetermined rate (gradient).

[0046] Next, we will describe the operation of the condenser leak monitoring system 1 with this configuration and the method of monitoring condenser leaks using the condenser leak monitoring system 1.

[0047] First, conductivity is continuously measured at multiple measurement points, including the condensate pump outlet (conductivity measurement step), and based on the measurement results in the conductivity measurement step, monitoring information including the conductivity of the multiple measurement points is provided to an external device, i.e., the user terminal 6 (information provision step). Then, in the information provision step, if the conductivity of a predetermined measurement point among the multiple measurement points is higher than a predetermined value at a predetermined startup stage when the power generation equipment P is started up, monitoring information including alarm information is provided to the external device, the user terminal 6. Specifically, during the cold startup of the power generation equipment P, if the conductivity at the condensate pump outlet and the low-pressure feedwater pump inlet exceeds a predetermined value / threshold at the time of startup of the waste heat recovery boiler (HRSG), it is suspected that there is a condenser tube leak (seawater contamination), and the fourth section SC4 labeled "Suspected Condenser Tube Leak" on the monitoring information screen of the user terminal 6 and the second monitor 61 is lit red.

[0048] Next, during normal operation after the power generation equipment P has started up, if the conductivity of a predetermined measurement point among multiple measurement points is higher than a predetermined value, monitoring information including alarm information is provided to the external user terminal 6. Specifically, during normal operation of the power generation equipment P, if the conductivity of the condensate pump outlet and the low-pressure feedwater pump inlet exceeds a predetermined value / threshold, it is suspected that there is a condenser tube leak (seawater contamination), and the fourth section SC4 labeled "Suspected Condenser Tube Leak" on the monitoring information screen of the user terminal 6 and the second monitor 61 is illuminated in red.

[0049] As described above, with this condenser leak monitoring system 1 and condenser leak monitoring method, when the power generation equipment P is started up and at a predetermined startup stage, if the conductivity at a predetermined measurement point is higher than a predetermined value, it is determined that there is a high possibility of a condenser tube leak occurring, and alarm information is provided and displayed to an external user terminal 6. Therefore, it becomes possible to properly and early detect and identify tube leaks and water quality abnormalities, and secondary damage due to delayed detection (for example, seawater contamination on the steam turbine side) can be prevented. In addition, it becomes possible to reduce the labor and costs required to detect tube leaks and water quality abnormalities.

[0050] Furthermore, for each type of startup of the power generation equipment P, at least one of the following is set: a predetermined startup stage, a predetermined measurement location, and a predetermined value. In other words, depending on the startup mode of the power generation equipment P, it is set at which startup stage the presence or absence of a tube leak should be judged, at which measurement location the judgment should be made, and at what threshold the judgment should be made. This makes it possible to properly determine the possibility of tube leaks occurring based on appropriate judgment factors. In short, it becomes possible to properly and early detect and identify tube leaks and water quality abnormalities.

[0051] Furthermore, when the power generation equipment P is set to cold start mode, the predetermined start-up stage is set to the start-up of the waste heat recovery boiler, and the predetermined measurement points are set to the condensate pump outlet and the low-pressure feedwater pump inlet, making it possible to properly determine the possibility of tube leaks. In other words, it becomes possible to properly and early detect and identify tube leaks and water quality abnormalities.

[0052] Furthermore, under normal operating conditions of the power generation equipment P, if the conductivity at a predetermined measurement point is higher than a predetermined value, it is determined that there is a high probability of a tube leak occurring, and alarm information is provided and displayed on an external user terminal 6. Therefore, even under normal operating conditions, tube leaks and water quality abnormalities can be detected and identified appropriately and promptly.

[0053] Although embodiments of this invention have been described in detail above, the specific configuration is not limited to these embodiments, and any design changes, etc., that do not depart from the gist of this invention are also included. For example, in the above embodiment, an alarm output was described when the startup mode is cold startup, the predetermined startup stage is the startup stage of the waste heat recovery boiler, and the predetermined measurement locations are the condensate pump outlet and the low-pressure feedwater pump inlet. However, depending on the type of power generation equipment P and operating conditions, alarm output may be provided for other startup modes, predetermined startup stages, and predetermined measurement locations. [Explanation of Symbols]

[0054] 1. Condenser Leak Monitoring System 2. Conductivity measuring instrument (means for measuring conductivity) 3-unit calculator 4. PI Server (Information Provisioning Method) 5. First monitor 6. User terminal (information display terminal) 61 Second monitor P Power Generation Facility

Claims

1. A condenser leak monitoring system for monitoring tube leaks in a condenser in a power generation facility that generates electricity by rotating a turbine with steam produced in a waste heat recovery boiler and condenses the steam after it has passed through the turbine in a condenser, Conductivity measuring means for measuring conductivity at multiple measurement points including the condensate pump outlet, An information providing means that provides externally monitoring information, including the conductivity of the plurality of measurement locations, based on the measurement results from the conductivity measuring means, An information display terminal that displays the monitoring information provided by the information provision means, The information providing means includes, when the power generation equipment is started up and at a predetermined startup stage, if the conductivity of a predetermined measurement point among the plurality of measurement points is higher than a predetermined value, the monitoring information includes alarm information. The measurement locations are peripheral equipment other than the condenser, including the condensate pump outlet, low-pressure feedwater pump inlet, low-pressure drum water, medium-pressure drum water, high-pressure drum water, low-pressure outlet steam, medium-pressure outlet steam, and high-pressure saturated steam. For each type of startup of the power generation equipment, including cold startup, at least one of the predetermined startup stage, predetermined measurement location, and predetermined value is set. A condenser leak monitoring system characterized by the following:

2. When the type of startup of the power generation equipment is a cold start, the predetermined startup stage is set to the startup of the waste heat recovery boiler, and the predetermined measurement locations are set to the condensate pump outlet and the low-pressure feedwater pump inlet. The condenser leak monitoring system according to feature 1.

3. In the normal operating state after the power generation equipment has been started up, if the conductivity of a predetermined measurement point among the plurality of measurement points is higher than a predetermined value, the monitoring information includes alarm information. A condenser leak monitoring system according to any one of claims 1 to 2.

4. A method for monitoring tube leaks in a condenser in a power generation facility that generates electricity by rotating a turbine with steam produced in a waste heat recovery boiler, and condenses the steam after it has passed through the turbine in a condenser, the method being used to monitor tube leaks in the condenser. A conductivity measurement step in which conductivity is measured at multiple measurement points, including the condensate pump outlet, An information provision step provides externally monitoring information, including the conductivity of the multiple measurement locations, based on the measurement results in the conductivity measurement step. The system includes, and in the information provision step, when the power generation equipment is started and at a predetermined startup stage, if the conductivity of a predetermined measurement point among the plurality of measurement points is higher than a predetermined value, the monitoring information includes alarm information. The measurement locations are peripheral equipment other than the condenser, including the condensate pump outlet, low-pressure feedwater pump inlet, low-pressure drum water, medium-pressure drum water, high-pressure drum water, low-pressure outlet steam, medium-pressure outlet steam, and high-pressure saturated steam. For each type of startup of the power generation equipment, including cold startup, at least one of the predetermined startup stage, predetermined measurement location, and predetermined value is set. A method for monitoring condenser leaks, characterized by the following features.

5. If the type of startup of the power generation equipment is a cold start, the predetermined startup stage is set to the startup of the waste heat recovery boiler, and the predetermined measurement points are set to the condensate pump outlet and the low-pressure feedwater pump inlet. The condenser leak monitoring method according to feature 4.

6. In the normal operating state after the power generation equipment has been started up, if the conductivity of a predetermined measurement point among the plurality of measurement points is higher than a predetermined value, the monitoring information includes alarm information. The condenser leak monitoring method according to any one of claims 4 to 5.

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