Determination device, determination program, determination method, determination system, and collection device

Abstract

In a simple manner, the continuous operating condition of the condensate drain is determined. [Solution] The determination device includes a determination unit that determines whether the condensate discharge device is in a non-operating state, a blocked state in which condensate clogs the condensate discharge device, or another state, based on an inlet side pressure value Pi, which is the pressure on the inlet side of an orifice type condensate discharge device having an inlet for inputting steam and an outlet for discharging condensate, and an inlet side temperature Ti, which is the temperature on the inlet side. The determination unit determines whether the condensate discharge device is in a normal operating state or a leaking state in which steam is leaking, based on an outlet side pressure value Po, which is the pressure on the outlet side of the condensate discharge device, and an outlet side temperature To, which is the temperature on the outlet side.

Description

[Technical field]

[0001] The present disclosure relates to a determination device, a determination method, and a determination system for determining an operating state of a condensate drainage device, and a collection device included in the determination system. [Background technology]

[0002] There are condensate drain devices in which steam is input and condensate is discharged (Patent Documents 1 to 4). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6408734 [Patent Document 2] Patent No. 6836454 [Patent Document 3] Patent No. 5961326 [Patent Document 4] Patent No. 7244120 [Non-patent literature]

[0004] [Non-Patent Document 1] "Wireless steam trap monitoring device", [online], Yokogawa Electric Corporation, [Retrieved February 16, 2024], Internet〈URL:https: / / web-material3.yokogawa.com / BU01W06A14-01JA.pdf〉 [Non-Patent Document 2] "Steam Trap Monitoring Module", [online], Yokogawa Electric Corporation, [Retrieved February 16, 2024], Internet〈URL:https: / / web-material3.yokogawa.com / GS01W06G01-01JA.pdf〉 Summary of the Invention [Problem to be solved by the invention]

[0005] Condensate discharge devices cannot be guaranteed to not have condensate retention or steam leakage due to increases or decreases in the amount of condensate caused by changes in operating conditions. Maintenance inspections require preparation and are time-consuming, and only the condition at the time of the maintenance inspection can be determined, making it difficult to determine continuous conditions or trends.

[0006] In view of the above, an object of the present disclosure is to easily determine the continuous operating state of a condensate drainage device. [Means for solving the problem]

[0007] A determination device of one embodiment of the present disclosure includes a determination unit that determines whether the condensate discharge device is in a non-operating state, a blocked state in which condensate is blocking the condensate discharge device, or another state, based on an inlet side pressure value Pi, which is the pressure on the inlet side of a condensate discharge device having an inlet for inputting steam and an outlet for discharging condensate, and an inlet side temperature Ti, which is the temperature on the inlet side. Effect of the Invention

[0008] According to the present disclosure, the continuous operating status of the condensate drainage device can be determined in a simple manner. [Brief description of the drawings]

[0009] [Figure 1] 1 illustrates a determination system according to an embodiment of the present disclosure. [Diagram 2] 4 is a flow chart illustrating a method for determining the operating status of a condensate drainage device. [Diagram 3] 4 is a flow chart illustrating a method for determining the operating status of a condensate drainage device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] FIG. 1 illustrates a determination system according to an embodiment of the present disclosure.

[0011] The determination system 1 is a system for determining the operating state of a condensate discharge device 10 (steam trap). The condensate discharge device 10 is provided in a heat exchanger or steam piping in a plant or the like that uses steam as a heat source, and automatically discharges condensed water (drain) generated after the steam releases heat from the piping. The condensate discharge device 10 may be an orifice-type condensate discharge device (see Patent Document 1) that does not have a moving part, or may be a float-type or disk-type condensate discharge device that has a moving part. The condensate discharge device 10 has an inlet 11 through which steam is input and an outlet 12 through which condensate is discharged. The inlet 11 of the condensate discharge device 10 is connected to an inlet-side piping 13. The outlet 12 of the condensate discharge device 10 is connected to an outlet-side piping 14.

[0012] The inlet side pressure sensor 15 and the outlet side pressure sensor 17 are installed in the inlet side pipe 13 and the outlet side pipe 14, respectively. Since the pressure in the inlet side pipe 13 or the outlet side pipe 14 changes relatively little depending on the measurement position, the inlet side pressure sensor 15 or the outlet side pressure sensor 17 only needs to be able to measure the pressure at any position in the inlet side pipe 13 or the outlet side pipe 14, and does not have to be limited to the vicinity of the inlet 11 or the outlet 12, particularly when an existing pressure sensor is used. On the other hand, the inlet side pressure sensor 15 and the outlet side pressure sensor 17 may be installed in the vicinity of the inlet 11 and the outlet 12 of the condensate drainage device 10, respectively.

[0013] The inlet temperature sensor 16 and the outlet temperature sensor 18 are, for example, thermocouples such as K-type thermocouples, and are installed in the inlet pipe 13 and the outlet pipe 14, respectively. The inlet temperature sensor 16 and the outlet temperature sensor 18 may be installed near the inlet 11 and the outlet 12 of the condensate drainage device 10, respectively. The inlet temperature sensor 16 and the outlet temperature sensor 18 preferably measure the internal temperatures of the inlet pipe 13 and the outlet pipe 14, but may also measure the pipe surface temperature near the inlet 11 and the outlet 12 (for example, 5 cm to 15 cm). When the inlet temperature sensor 16 and the outlet temperature sensor 18 are sensors for measuring the pipe surface temperature, they may be, for example, flat-plate temperature sensors insulated with a thin heat-resistant resin. In this case, it is preferable to keep the inlet temperature sensor 16 and the outlet temperature sensor 18 warm so as not to be affected by the outside air.

[0014] The determination system 1 includes a collection device 20 and a determination device 30. The collection device 20 includes a receiving unit 21, a conversion unit 23, a recording unit 24, a communication interface 25, a timer 26, and a battery 22. The receiving unit 21 is detachably connected to the inlet pressure sensor 15, the inlet temperature sensor 16, the outlet pressure sensor 17, and the outlet temperature sensor 18 via a connector, a terminal board, a screw, or the like, and receives analog signals from each of the sensors 15-18. The conversion unit 23 periodically collects the analog signals received from each of the sensors 15-18, converts them into digital signals by A / D conversion, and records the temperature and pressure values ​​converted into digital signals in the recording unit 24. The communication interface 25 is, for example, a USB interface, and records the temperature and pressure values ​​recorded in the recording unit 24 in a portable USB memory or transmits them to the determination device 30 via a USB cable. The timer 26 is used to control the timing at which the conversion unit 23 converts the analog signals into digital signals and records them. The battery 22 is typically a primary battery so as not to require an AC power connection (cordless), and drives the collecting device 20 and may also drive the inlet pressure sensor 15 and / or the outlet pressure sensor 17. When driven by the battery 22, the inlet pressure sensor 15 and / or the outlet pressure sensor 17 may be of a low-voltage drive type. When the collecting device 20 is installed outdoors, it is preferable to store it in a case with a waterproof structure.

[0015] The determination device 30 is a dedicated device or a general-purpose personal computer, etc. The determination device 30 has a communication interface 31, a control circuit 32, and a display device 33. The communication interface 31 is, for example, a USB interface, and receives the temperature and pressure values ​​recorded in the determination system 1 via a portable USB memory or a USB cable. In the control circuit 32 (computer), the CPU loads a determination program recorded in the ROM into the RAM and executes it to operate as a determination unit 34. The determination unit 34 determines the time-dependent (continuous) operating state of the condensate drainage device 10 based on the temperature and pressure values. The display device 33 displays a GUI showing the time-dependent (continuous) operating state of the condensate drainage device 10. The GUI may be in the form of a graph, a table, etc.

[0016] 2 and 3 are flow charts illustrating a method for determining the operating state of the condensate drainage device.

[0017] In the determination system 1 configured as above, the collection device 20 is installed near the condensate discharge device 10 to be investigated, and the collection device 20 is connected to the inlet pressure sensor 15, the inlet temperature sensor 16, the outlet pressure sensor 17, and the outlet temperature sensor 18 (step S1). The collection device 20 periodically collects and records (at time intervals set in the timer 26, for example, every few seconds to once a day) data on temperature and pressure values ​​for a certain period (period to be determined for the operating state) (step S2). After the certain period ends, the connection between the collection device 20 and each sensor 15-18 is removed, and the collection device 20 is connected to the determination device 30 by wire to output (transmit) the data on temperature and pressure values ​​recorded in the collection device 20 to the determination device 30. Alternatively, the data on temperature and pressure values ​​recorded in the collection device 20 is output (transmitted) to the determination device 30 via a portable recording medium such as a USB memory (step S3). The judgment section 34 of the judgment device 30 judges the time-dependent (continuous) operating state of the condensate discharge device 10 for this fixed period (step S4), and displays the trend of the measurement period (i.e., the time-dependent (continuous) progression of the operating state) and the judgment result on the display device 33 (step S5).

[0018] On the other hand, when existing pressure sensors incorporated in the operation system are used as the inlet pressure sensor 15 and the outlet pressure sensor 17, a file of pressure values ​​measured by the existing inlet pressure sensor 15 and the outlet pressure sensor 17 may be imported into the judgment unit 34 of the judgment device 30. In this case, the collection device 20 is connected to the inlet temperature sensor 16 and the outlet temperature sensor 18, and does not need to be connected to the inlet pressure sensor 15 and the outlet pressure sensor 17. In this case, the collection device 20 is installed near the condensate drainage device 10 to be investigated, and the collection device 20 is connected to the inlet temperature sensor 16 and the outlet temperature sensor 18 (step S1a). The collection device 20 periodically collects and records temperature data for a certain period (period to be determined for the operating state) (step S2a). After the certain period ends, the collection device 20 is disconnected from each sensor 16, 18, and the temperature data recorded in the collection device 20 is output (transmitted) to the judgment device 30 (step S3a). Meanwhile, pressure values ​​measured by the inlet pressure sensor 15 and the outlet pressure sensor 17, which are periodically collected and recorded in an external storage device incorporated in the existing operation system, are converted into a file and output (transmitted) to the determination device 30 (step S3b). Steps S4-S5 are similar.

[0019] In step S4, the determination unit 34 determines whether the condensate discharge device 10 is in a non-operating state, a blocked state where the condensate is blocking the condensate discharge device 10, or another state, based on the inlet pressure value Pi, which is the pressure on the inlet 11 side of the condensate discharge device 10, and the inlet temperature Ti, which is the temperature on the inlet 11 side. The blocked state occurs when condensate is accumulated at the inlet 11 and cannot be discharged as required, due to clogging of the orifice portion, and accumulation of condensate exceeding the discharge capacity. The determination unit 34 determines whether the condensate discharge device 10 is in a normal operating state or a leaking state where steam is leaking, based on the outlet pressure value Po, which is the pressure on the outlet 12 side of the condensate discharge device 10, and the outlet temperature To, which is the temperature on the outlet 12 side. In the normal operating state, there is no leakage of steam and condensate is discharged. In the leaking state, the amount of condensate generated is extremely small, and steam leaks from the orifice portion.

[0020] The determination method of step S4 will be described in more detail. The determination unit 34 preliminarily sets a pressure threshold value pi (the minimum pressure value on the inlet 11 side, for example, 200 kPa), a threshold value si (the determination criterion for blockage, for example, 0.1), a first temperature threshold value so1 (the determination criterion for a small leakage amount, for example, 2 to 7 °C), and a second temperature threshold value so2 (the determination criterion for a large leakage amount, for example, 7 to 13 °C). The second temperature threshold value so2 is higher than the first temperature threshold value so1 (so1 < so2). Each threshold value may vary depending on the plant.

[0021] When the inlet-side pressure value Pi is less than the pressure threshold value pi (Pi < pi) (step S11, No), the determination unit 34 determines that it is in a non-operating state (step S12). On the other hand, when the inlet-side pressure value Pi is greater than or equal to the pressure threshold value pi (Pi ≥ pi) (step S11, Yes), the determination unit 34 determines the saturation temperature tsi for the inlet-side pressure value Pi (step S13). The saturation temperature is determined depending on the pressure value. A correspondence table of pressure values (kPaG) and saturation temperatures (for example, a table recording saturation temperatures for pressure values at intervals of 50 kPaG) is stored in advance, and the determination unit 34 can calculate the corresponding saturation temperature based on the inlet-side pressure value Pi by referring to the correspondence table. Specifically, the determination unit 34 calculates the saturation temperature tsi for the inlet-side pressure value Pi by temporary storage calculation from two pressure values and saturation temperatures before and after the actually measured inlet-side pressure value Pi. Next, the determination unit 34 calculates Ki = (tsi - Ti) / tsi from the saturation temperature tsi and the inlet-side temperature Ti (step S14). When Ki is greater than or equal to the threshold value si (Ki ≥ si) (step S15, Yes), it means that the inlet-side temperature Ti has decreased by a certain amount or more from the saturation temperature tsi for the inlet-side pressure value Pi. In this case, the determination unit 34 determines that it is in a blocked state (step S16). On the other hand, when Ki is less than the threshold value si (Ki < si) (step S15, No), the condensate discharge device 10 is not in a non-operating state or a blocked state, but in another state (normal or leakage).

[0022] The determination unit 34 determines the saturation temperature tso with respect to the outlet-side pressure value Po in the same manner as in step S13 using the correspondence table (step S21). The determination unit 34 calculates Ko = To - tso, which indicates how many degrees higher the outlet-side temperature To is than the saturation temperature tso (the difference) (step S22). When Ko is less than the first temperature threshold so1 (Ko < so1) (step S23, No), the determination unit 34 determines that it is in a normal state (step S24). On the other hand, when Ko is greater than or equal to the first temperature threshold so1 (Ko ≥ so1) (step S23, Yes), it means that the outlet-side temperature To is higher than the saturation temperature tso with respect to the outlet-side pressure value Po by a certain amount or more. In this case, the determination unit 34 determines that it is in a leakage state. Furthermore, when Ko is greater than or equal to the second temperature threshold so2 (so1 < so2) (step S25, Yes), the determination unit 34 determines that the leakage amount is large (step S26). On the other hand, when Ko is less than the second temperature threshold so2 (so1 ≤ Ko < so2) (step S25, No), the determination unit 34 determines that the leakage amount is small (step S27).

[0023] Conventionally, as a device for discharging condensate (drain), there are float-type and disk-type condensate discharge devices (steam traps). For example, in order to monitor a float-type condensate discharge device, a monitoring module equipped with a temperature sensor and an acoustic sensor is installed upstream of the float-type steam trap, and a technique for detecting the normality, clogging, and steam leakage of the condensate discharge device based on temperature, sound, and vibration is known (Patent Documents 2-4 and Non-Patent Documents 1-2).

[0024] Furthermore, when the operating state of a condensate discharge device having a movable part such as a float type or a disk type is detected based on a temperature sensor and an acoustic sensor, the acoustic sensor is highly likely to detect the sounds and vibrations of various devices in the plant as noise. In addition, there is a possibility that the amount of calculations and the processing time will be large in order to accurately remove the noise. In contrast, according to this embodiment, the steam state is estimated from data of temperature and pressure values ​​that are free of noise such as sound and vibration, and the operating state of the condensate discharge device 10 is determined. Therefore, the operating state of the condensate discharge device 10 can be accurately determined without being affected by noise, and the amount of calculations and processing time required for noise removal are not required. Therefore, this embodiment is useful for accurately and simply determining the operating state of not only an orifice type condensate discharge device having no movable part, but also a float type, a disk type, or other condensate discharge device having a movable part.

[0025] The orifice type condensate discharge device does not have any moving parts and is therefore unlikely to break down. However, it cannot be said that there is no possibility of condensate retention or steam leakage due to clogging of the orifice hole caused by rust or foreign matter in the upstream piping, or an increase or decrease in the amount of condensate caused by a change in the operating conditions. Maintenance inspections include periodic inspections, confirmation inspections when the operating conditions are changed, and inspections when there are signs of abnormality. On the other hand, maintenance inspections require preparation and are time-consuming, and only the state at the time of the maintenance inspection can be determined, making it difficult to determine continuous states or trends. In addition, since the orifice type condensate discharge device does not have any moving parts, it is not possible to determine the operating state of the condensate discharge device using an acoustic sensor. In contrast, according to this embodiment, the steam state can be estimated from the data of temperature and pressure values ​​upstream and downstream of the orifice type condensate discharge device 10, and the operating state of the condensate discharge device 10 can be determined.

[0026] In addition, steam plants are equipped with several thousand condensate drainage devices, and the investigation of these devices takes a lot of time. It is desirable to use continuous information for a certain period of time to determine the status of equipment when changing equipment or operating conditions, but this increases the amount of work required and makes it difficult to implement. If the status is monitored by constantly monitoring pressure and temperature values ​​and transmitting them to a monitoring system, the investment required for building the hardware and software for the constant monitoring system is large, and it is often difficult to realize this.

[0027] On the other hand, since an orifice type condensate drain device is essentially failure-free, it is possible to determine the continuous state and trend of the condensate drain device from data collected over a certain period (several hours to several weeks) during maintenance and inspection, without constantly monitoring the pressure and temperature. It is considered effective to measure changes over several days or within an operating cycle to determine the state at times such as during regular inspections, when installing or replacing equipment, when changing operating conditions, or when there are signs of abnormality.

[0028] Conventional inspection methods only judged the instantaneous state at the time of inspection, but in this embodiment, by installing a collection device 20 at each sensor and transmitting the collected data within a set period to a judgment device 30, the operating state within the set period can be judged continuously. This makes it possible to clarify the state changes throughout the day and within the operation cycle, enabling more appropriate inspections, i.e., more advanced maintenance and inspection work. By being able to judge continuous states and trends, problems become clear and effective countermeasures can be taken.

[0029] According to this embodiment, since it is possible to use simpler equipment (collection device 20 and determination device 30) than constructing a continuous monitoring system, the investment amount is small. The installation location of the collection device 20 and the determination device 30 can be changed according to the cycle of inspection work (movement of workers) and the space of the plant. The collection device 20 uses a battery 22 and is cordless, so it is highly portable. For example, the collection device 20 is connected to each sensor 15-18 near the condensate drainage device 10 to be investigated via a connector, and temperature and pressure value data for a certain period are collected and recorded, and then the same collection device 20 is connected to each sensor 15-18 near another condensate drainage device 10 via a connector, and temperature and pressure value data for a certain period are collected and recorded. The temperature and pressure value data recorded in the collection device 20 can be transmitted to the determination device 30 via a portable USB memory or a USB cable as appropriate. In this way, the collection device 20 and the determination device 30 are portable and can be shared by many condensate discharge devices 10 in the plant, so there is no need to install the collection device 20 and the determination device 30 for each condensate discharge device 10, and the number of devices required can be reduced. The on-site work required by workers is only the attachment and detachment work of connecting the collection device 20 to each sensor 15-18 via a connector, which makes it safe and convenient and facilitates on-site maintenance and inspection work. [Explanation of symbols]

[0030] Determination system 1, condensate drain device 10, collection device 20, determination device 30.

Claims

1. A determination unit that determines whether the condensate discharge device is in a non-operating state, in a blocked state where the condensate discharge device is blocked by the condensate, or in another state, based on an inlet side pressure value Pi that is the pressure on the inlet side of the condensate discharge device, and an inlet side temperature Ti that is the temperature on the inlet side, and the inlet side pressure value Pi that is the pressure on the inlet side of the condensate discharge device, and the inlet side temperature Ti that is the temperature on the inlet side. A determination device comprising:

2. The determination device according to claim 1 , The determination unit determines whether the condensate discharge device is in a normal operating state or in a leakage state in which steam is leaking, based on an outlet side pressure value Po, which is the pressure on the outlet side of the condensate discharge device, and an outlet side temperature To, which is the temperature on the outlet side. Judgment device.

3. a determination unit which determines whether the condensate discharge device is in a normal operating state or in a leaking state in which steam is leaking, based on an outlet side pressure value Po, which is the pressure on the outlet side of the condensate discharge device, and an outlet side temperature To, which is the temperature on the outlet side, and which is an orifice type having no movable parts such as a float type or a disk type. A determination device comprising:

4. The determination device according to claim 1 , The determination unit determines a saturation temperature tsi for the inlet side pressure value Pi, and determines that the blocked state occurs when Ki=(tsi-Ti) / tsi is equal to or greater than a threshold value si (Ki≧si). Judgment device.

5. The determination device according to claim 1 , The determination unit determines that the inlet pressure value Pi is less than a pressure threshold value pi (Pi<pi). Judgment device.

6. The determination device according to claim 2 or 3, The determination unit determines a saturation temperature tso for the outlet side pressure value Po, and determines that the leakage state exists when Ko=To-tso is equal to or greater than a first temperature threshold value so1 (Ko≧so1). Judgment device.

7. The determination device according to claim 6, The determination unit determines that the leakage amount is large when Ko is equal to or greater than a second temperature threshold so2 that is higher than the first temperature threshold so1 (Ko≧so2), and determines that the leakage amount is small when Ko is less than the second temperature threshold so2 (so1≦Ko<so2). Judgment device.

8. 7. The determination device according to claim 6, wherein when Ko is less than the first temperature threshold value so1 (Ko<so1), the device determines that the state is normal. Judgment device.

9. The determination device according to claim 2, The determination unit acquires the inlet side pressure value Pi, the inlet side temperature Ti, the outlet side pressure value Po, and the outlet side temperature To output from a collection device that periodically collects and records the inlet side pressure value Pi based on the output of an inlet side pressure sensor installed in an inlet side piping connected to the inlet of the condensate discharge device, the inlet side temperature Ti based on the output of an inlet side temperature sensor installed in the inlet side piping, the outlet side pressure value Po based on the output of an outlet side pressure sensor installed in an outlet side piping connected to the outlet of the condensate discharge device, and the outlet side temperature To based on the output of an outlet side temperature sensor installed in the outlet side piping. Judgment device.

10. The computer of the judgment device A step of determining whether the condensate discharge device is in a non-operating state, in a clogged state where the condensate discharge device is clogged by condensate, or in another state, based on an inlet side pressure value Pi, which is the pressure on the inlet side of the condensate discharge device, and an inlet side temperature Ti, which is the temperature on the inlet side of the condensate discharge device, which is an orifice type that does not have a movable part of a float type or a disk type. A judgment program that executes the above.

11. A computer of the determination device executes a step of determining whether the condensate discharge device is in a non-operating state, in a blocked state where condensate is blocking the condensate discharge device, or in another state, based on an inlet side pressure value Pi, which is the pressure on the inlet side of a condensate discharge device that is an orifice type having no float-type or disk-type movable part and has an inlet for inputting steam and an outlet for discharging condensate, and an inlet side temperature Ti, which is the temperature on the inlet side. Judgment method.

12. The method of claim 11, further comprising: The computer of the determination device executes a step of determining whether the condensate drain device is in a normal operating state or in a leak state in which steam is leaking, based on an outlet side pressure value Po, which is the pressure on the outlet side of the condensate drain device, and an outlet side temperature To, which is the temperature on the outlet side. Judgment method.

13. The method of claim 12, further comprising: connecting a collector to an inlet pressure sensor installed in an inlet pipe connected to the inlet of the condensate drainage device, an inlet temperature sensor installed in the inlet pipe, an outlet pressure sensor installed in an outlet pipe connected to the outlet of the condensate drainage device, and an outlet temperature sensor installed in the outlet pipe; The collecting device periodically collects and records the inlet side pressure value Pi based on the output of the inlet side pressure sensor, the inlet side temperature Ti based on the output of the inlet side temperature sensor, the outlet side pressure value Po based on the output of the outlet side pressure sensor, and the outlet side temperature To based on the output of the outlet side temperature sensor; outputting the inlet side pressure value Pi, the inlet side temperature Ti, the outlet side pressure value Po, and the outlet side temperature To recorded in the collection device to the determination device; The determination method further comprises:

14. The method of claim 12, further comprising: connecting a collector to an inlet temperature sensor installed in an inlet pipe connected to the inlet of the condensate drainage device and an outlet temperature sensor installed in an outlet pipe connected to the outlet of the condensate drainage device; The collecting device periodically collects and records the inlet side temperature Ti based on the output of the inlet side temperature sensor and the outlet side temperature To based on the output of the outlet side temperature sensor; outputting the inlet side temperature Ti and the outlet side temperature To recorded in the collection device to the determination device; a step of outputting to the determination device the inlet-side pressure value Pi based on an output of an inlet-side pressure sensor installed in an inlet-side piping connected to the inlet of the condensate drainage device and the outlet-side pressure value Po based on an output of an outlet-side pressure sensor installed in an outlet-side piping connected to the outlet of the condensate drainage device, which are periodically collected and recorded; The determination method further comprises:

15. a determination device having a determination unit which determines whether the condensate discharge device is in a non-operating state, a blocked state in which condensate blocks the condensate discharge device, or another state, based on an inlet side pressure value Pi which is the pressure on the inlet side of the condensate discharge device and an inlet side temperature Ti which is the temperature on the inlet side, and which determines whether the condensate discharge device is in a normal operating state or a leaking state in which steam is leaking, based on an outlet side pressure value Po which is the pressure on the outlet side of the condensate discharge device and an outlet side temperature To which is the temperature on the outlet side; a collection device that periodically collects and records the inlet side pressure value Pi based on the output of an inlet side pressure sensor installed in an inlet side piping connected to the inlet of the condensate drainage device, the inlet side temperature Ti based on the output of an inlet side temperature sensor installed in the inlet side piping, the outlet side pressure value Po based on the output of an outlet side pressure sensor installed in an outlet side piping connected to the outlet of the condensate drainage device, and the outlet side temperature To based on the output of an outlet side temperature sensor installed in the outlet side piping, which are output to the determination device. A determination system comprising:

16. The condensate discharge device is an orifice type having no movable parts, such as a float type or a disk type, and has an inlet for inputting steam and an outlet for discharging condensate. Based on an inlet side pressure value Pi, which is the pressure on the inlet side, and an inlet side temperature Ti, which is the temperature on the inlet side, it is determined whether the condensate discharge device is in a non-operating state, a blocked state in which condensate is blocking the condensate discharge device, or another state, and based on an outlet side pressure value Po, which is the pressure on the outlet side of the condensate discharge device, and an outlet side temperature To, which is the temperature on the outlet side, it is determined whether the condensate discharge device is in a normal operating state, a state in which steam is leaking, or a state in which steam is leaking. The inlet side pressure value Pi based on the output of an inlet side pressure sensor installed in an inlet side piping connected to the inlet of the condensate drainage device, the inlet side temperature Ti based on the output of an inlet side temperature sensor installed in the inlet side piping, the outlet side pressure value Po based on the output of an outlet side pressure sensor installed in an outlet side piping connected to the outlet of the condensate drainage device, and the outlet side temperature To based on the output of an outlet side temperature sensor installed in the outlet side piping are periodically collected and recorded. Collection device.

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