JP2002117468A - Plant operation diagnosis and support system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plant operation diagnosis and support system capable of precisely coping with the occurrence of an abnormality by unifying the monitoring of the information from sensors provided in an operation plant facility. SOLUTION: This system comprises internal monitoring terminals 101A-C provided at least two or more first plant facilities 100A-C and the centralized control terminal 1001 of a centralized control system 1000 capable of communicating therewith through a network 11. The sensor information 12 of the plant facilities is transmitted to the centralized control terminal via the internal monitoring terminals 101A-C of the plant facilities. The sensor information is centralized and controlled in the centralized control terminal 1001 to monitor the operating state of each plant facility, and it is also judged whether the information from the sensors is normal or not. When the information from the sensors is normal, the monitoring is continued as it is. When the information from the sensors is not normal, ranking for alarm according to level and authorization of the alarm level are performed to diagnose the plant operating state and also support the countermeasure therefore.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for unifying the monitoring of information from various sensors provided on members and devices constituting operating plant equipment, to monitor the information efficiently, and to provide an accurate method when an abnormality occurs during operation. The present invention relates to a plant operation diagnosis / support system capable of giving an instruction to cope with the problem.

[0002]

Background Art and Problems to be Solved by the Invention
The plant equipment is intensively provided in the control device for each plant. Therefore, the operation is monitored in each plant, and the operation is stopped or inspected based on the monitoring result.

For example, a thermal power plant will be described as a plant facility. As shown in FIG. 21, in a power plant 001, various information from a sensor installed at a predetermined location of a plant component 01 is transmitted to a central control unit 02. And is displayed on the in-house terminal 03. Then, while monitoring the sensor information provided in the plant component equipment 01, the operation manager 04 performs the normal operation operation 05 according to the operation management manual. On the other hand, the plant component 01
At a predetermined location, a raw sample is separately collected, and the collected sample 06 is analyzed by the person in charge of chemical analysis 07, and the result is reported to the operation manager 04.

[0004] For this reason, when an alarm or an accident 08 occurs, the driving manager 04 performs driving control based on the judgment in light of past driving conditions.

[0005] Generally, each power plant is in a separate and independent state, has no comparison of monitoring data, and is well versed in the plant equipment in order to perform operation control, and is skilled in analyzing information from sensors. It is the present situation that experienced people judge.

Further, for example, monitoring of water quality, which is indispensable in a thermal power plant, is less important than other operation operations (main plant equipment such as power generation), and the treatment operation is postponed in an emergency. There is. This is because it is rarely necessary to immediately stop the operation of the plant, even if the water quality is slightly degraded.

However, since a constant monitoring level is set, an alarm may frequently occur each time a minor failure occurs. If the number of alarms is large, a really important alarm may be overlooked. That is, once the alarm (sound information) is turned off, it is displayed on the screen of the terminal in the office thereafter, and it may be uncertain whether it is an important warning display at repeated locations. There is.

In particular, when it is necessary to stop the operation of the plant, the working system of the person in charge of the chemical analysis for water quality management is generally not a 24-hour system, so that the response may be delayed. As a result, there is a problem that, in the determination of the water quality management, the report to the operation manager 04 is delayed, and as a result, the response to the operation plan is delayed.

[0009] For example, due to the breakage of the heat exchanger in the condenser,
In the case where seawater leaks in the piping, the index of the sensor such as pH fluctuates, but the judgment of whether the fluctuation width of the pH sensor is a failure of the meter itself or whether there is a real leak or not is a skill. At present, engineers make decisions based on experience.

[0010] In addition, when an accident occurs, priority is given to measures, investigation of the cause of the accident is not easy, and it has not been possible to prepare a database for the next response. Furthermore, even if this database is created, it is for each plant equipment, and at present, there is no correspondence by exchanging data between thermal power plants in various places.

[0011] In addition, in the event of an accident, recovery work includes:
There is a problem that it is left to the manufacturer who installed the plant equipment, and it is not possible to monitor the repair cost of the details of the accident processing.

As described above, a supervisor who monitors sensor information of plant equipment requires skill and experience. At present, however, in the current situation where deployment is required for each plant,
High labor costs are essential.

In the case where a raw sample is collected instead of sensor information and chemical analysis is required, it is necessary to secure the analysis personnel, which also increases labor costs. is there.

Further, in the chemical analysis, analysis contents are
When the analysis method and equipment are different and measurement is performed individually for each plant, there are cases where the measurement varies and it is not possible to provide accurate information accurately. In order to improve the analysis accuracy, it is necessary to introduce the latest analysis equipment, but the analysis under the collective management is more efficient than the analysis performed at each plant.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a plant operation diagnosis / support system which integrally monitors a plant operation state through a network, accurately diagnoses a monitoring result, and supports operation. .

[0016]

According to a first aspect of the present invention for solving the above-mentioned problems, it is possible to mutually communicate with an in-house monitoring terminal provided at each of at least two or more plant facilities through a network. Including a terminal for centralized management of a centralized management system,
Information from the various sensors provided in the device is sent to the central manager terminal via the in-plant monitoring terminal of the plant equipment, and the sensor information is centrally managed by the central manager terminal to monitor the operation status of each plant equipment. Monitor and determine whether the information from the sensor is normal. If the information from the sensor is normal, continue monitoring.If the information from the sensor is not normal, The alarm ranking according to the alarm ranking is determined, and the plant operation content according to the alarm ranking is diagnosed and supported.

According to a second aspect, in the first aspect, a plant operation diagnosis / support database for determining the ranking is included.

A third aspect of the present invention is the plant operation diagnosis / support system according to the second aspect, wherein the plant operation diagnosis / support database is located in a centralized management system having a centralized management terminal.

According to a fourth aspect, in the second aspect, the centralized management terminal and a database system terminal capable of communicating with each other through a network or a dedicated line via a security system are provided. It includes an external database system that provides a database.

According to a fifth aspect, in the first aspect, the sensor is any one of temperature, pressure, vibration, current value, chemical index value, flow rate, image, or a combination of two or more of these. It is characterized by.

A sixth invention is characterized in that, in the first invention, two or more plant facilities are of the same manufacturer or different manufacturers.

[0022] A seventh invention is characterized in that, in the first invention, a communication system to the central management terminal has a security system for prohibiting access to terminals other than the terminal of the plant equipment which has concluded operation diagnosis and support management. .

The eighth invention is characterized in that, in the first invention, the centralized management system performs chemical analysis of the sample collected by the plant equipment, and sends the analysis information to the centralized management terminal.

According to a ninth aspect, in the first aspect, the centralized management system instructs adjustment of the operation content of each plant.

According to a tenth aspect, in the first aspect, the plant equipment is a thermal power plant equipment.

According to an eleventh aspect, in the tenth aspect,
The sensor information is water quality of thermal power plant equipment.

According to a twelfth aspect, in the eleventh aspect,
It is characterized in that the water quality of the thermal power plant equipment is any one of the quality of condensed water, the quality of feed water and the quality of boiler water.

According to a thirteenth aspect, in the eleventh aspect,
The water quality sensor of the thermal power plant equipment is a silica meter, an electrical conductivity meter, a pH meter, a hydrazine meter, a dissolved oxygen meter, a turbidity meter, or a combination thereof.

According to a fourteenth aspect, in the tenth aspect,
The centralized management system instructs adjustment of the power generation capacity of each plant.

The fifteenth plant operation diagnosis / support method invention includes an in-house monitoring terminal provided at each of at least two or more plant facilities and a central management terminal capable of communicating with each other through a network. , Information from various sensors provided in the members and devices constituting the plant equipment is sent to the central manager terminal via the in-house monitoring terminal of the plant equipment, and the sensor information is centrally managed by the central manager terminal. And monitor the operation status of each plant equipment, determine whether the information from the sensor is normal or abnormal, and if the information from the sensor is normal, continue monitoring as it is When the information is abnormal, a ranking according to each abnormal level is determined to diagnose and support plant operation contents.

According to a sixteenth aspect, in the fifteenth aspect,
When performing the above ranking judgment,
It is characterized by using a support database.

According to a seventeenth aspect, in the fifteenth aspect,
The above-mentioned plant equipment is a thermal power plant equipment.

An eighteenth recording medium according to the fifteenth invention is characterized in that the sensor information is water quality of a thermal power plant.

The invention of a nineteenth recording medium includes an in-house monitoring terminal provided in each of at least two or more plant facilities, and a central management terminal capable of communicating with each other through a network. Diagnosis of operation content
When assisting, send information from various sensors provided on members and devices constituting the plant facility to the central manager terminal via the in-house monitoring terminal of the plant facility, and send the sensor at the central manager terminal Centrally manage the information to monitor the operation status of each plant facility, determine whether the information from the sensor is normal or abnormal, and continue monitoring if the information from the sensor is normal. When the information from the sensor is abnormal, a program for controlling a computer to determine a ranking according to each abnormal level and diagnose and support plant operation contents is stored.

According to a twentieth aspect, in the nineteenth aspect,
When performing the above ranking judgment,
It is characterized by using a support database.

According to a twenty-first aspect, in the nineteenth aspect,
The above-mentioned plant equipment is a thermal power plant equipment.

According to a twenty-second invention, in the nineteenth invention,
The sensor information is water quality of thermal power plant equipment.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to these embodiments.

FIG. 1 is a schematic diagram of a network connection diagram of a diagnosis / support system for plant equipment. As shown in FIG. 1, the system according to the present embodiment includes at least two or more first plant facilities 100A and second plant facilities 10A.
. 0B, third plant facilities 100C... (In the present embodiment, three plants will be described as an example), and can communicate with each other via the network 11 with the in-house monitoring terminals 101A, 101B, 101C. Including the centralized management terminal 1001 of the centralized management system 1000 and the sensor information 12 from various sensors provided in the members and devices constituting the plant equipments 100A to 100C via the in-house monitoring terminals 101A to 101C of the plant equipments. Are sent to the terminal 1001 for centralized manager, the sensor information 12A to 12C... Are centrally managed by the terminal 1001 for centralized manager to monitor the operation status of each of the plant facilities 100A, 100B, 100C. 12A-1
It is determined whether or not 2C is normal, and information 1 from the sensor is determined.
When 2A to 12C is normal, monitoring is continued as it is, and when information 12A to 12C from the sensor is not normal, the contents are referred to the contents of the plant operation diagnosis / support database as needed to meet the level. The warnings are ranked and the warning level is recognized, the plant operation status is diagnosed in the central management system 1000 according to the warning ranking, and the central management system 1 is used.
In accordance with the diagnosis status at 000, the plant manager (for example, the first plant facility 001A) that issued the warning about the plant facility management information is given an instruction 13A such as a countermeasure, etc. It supports driving.

Here, the structure of the plant equipment will be described by taking the first plant equipment 100A as an example. The plant equipment 102A and the plant equipment 102A
And a central controller 103A for centrally controlling the constituent equipment thereof, and the central controller 103A is connected to the central controller 103A via a dedicated line (such as a dedicated LAN) in the office. Office control terminal 10
4A is connected to the central control device 103A via a dedicated line (such as a dedicated LAN) in the office.
And an in-house monitoring terminal 101A that sends the information 12A to the 000 terminals 1001.

In the present embodiment, the plant operation diagnosis / support database stores a dedicated line (dedicated L) in a centralized management system 1000 having a centralized management terminal 1001.
In addition to the database 1002 connected via an AN or the like, the present invention is also provided in a database system 2000 which is an external third party (manufacturer or information storage organization, etc.), but the present invention is not limited to this. is not. The reason why the database system is installed outside as in the present embodiment is that the database 1002 in the centralized management system 1000 stores data such as past operation status in plant equipment managed by the system 1000. In some cases, there is a lack of information to judge the situation. In such a case, the abnormalities can be dealt with promptly and accurately by referring to the database 2000, which has abundant contents of a third party such as a manufacturer. It is intended to do.

The terminal 1001 of the centralized management system 1000 and the external database system 2000 can communicate with each other through a network 14 or a dedicated line 15 via a security system.
The external database system 2000 includes an operation control method for various plants based on all sensor information according to various plant facilities and a warning rank of the sensor information,
Information that can correspond to a repair method, a recovery method, a coping method, and the like is stored in a database, which assists in determining a warning level and provides a database relating to driving support in accordance with each warning level.

Here, in the present invention, the plant equipment 100
As various sensors provided in constituent devices (members, devices, and the like) constituting A to 100C, for example, any one of temperature, pressure, vibration, current value, chemical index value, flow rate, image, or a combination of two or more of these information Although such information is used, the present invention is not limited to such sensor information. In addition, the said plant equipment 100A-100C ...
The two or more plant facilities may be of the same manufacturer or different manufacturers, and are contractually concluded to receive centralized management system 1000 and its operation and support.

Therefore, the centralized management system 1000
Communication to the centralized management terminal 1001 is prohibited by a security system that prohibits access to terminals other than the terminal of the plant facility that has concluded the operation diagnosis and support management.

Further, each of the above-mentioned plant equipments 100A to 100A
The collected samples 105A to 105C collected at 0C are analyzed by the centralized management system 1000 in order to separately perform chemical analysis, and the analysis information is stored in the centralized management terminal 100.
I send it to 1.

In the centralized management system 1000, it is instructed to adjust the operation contents of other plant equipment (for example, when the first plant equipment fails, equipment other than the first plant) depending on the degree of abnormality of each plant. Can also. Thereby, even when an abnormality occurs and the operation efficiency of the plant is reduced, it can be supported by improving the operation efficiency of another plant.

The plant operation diagnosis / support system of the present invention is not limited to the embodiment shown in FIG.
The centralized management system 1000 shown in FIG.
0A, 1000B ...), and the centralized management system 1000
A is the contracted plant equipment 100A, 100B, 1
The central management system 1000B may manage the contracted plant facilities 100X, 100Y, and 100Z through the network 11 while managing the 00C via the network 11. At this time, there may be a plurality of database systems 2000, or as shown in FIG. 2, a configuration in which the centralized management systems 1000A and 1000B can be shared and used.

The operation diagnosis and support of a plant will be described below by taking a thermal power plant as an example of the above plant equipment. Here, various monitoring targets are assumed. In the present embodiment, the water quality of the thermal power plant equipment will be described as an example of the sensor information.

FIG. 3 is a schematic diagram of a network connection diagram of a water quality diagnosis / support system for thermal power plant equipment. As shown in FIG. 3, a network connection system according to the present embodiment is connected to a communication network such as the Internet (hereinafter referred to as “NE”).
T: the Internet network) 11, a first power plant 100A, a second power plant 100B, and a third power plant 100C (hereinafter, three power plants in the present embodiment will be described as an example). 2) shows a state in which the in-house monitoring terminals 101A to 103C provided in the respective facilities and the central management terminal 1001 of the central management system 1000 are connected. The in-house monitoring terminal 101A and the like are used when connecting the plant facility to the Internet, and include, for example, a personal computer (a personal computer or a data processing unit that performs similar functions, hereinafter a “computer”).
Etc.). The central management terminal 1001 is used when connecting to the Internet from the central management system 1000. For example, a personal computer (a personal computer (EWS, a large computer, a supercomputer, etc., which performs the same function as a personal computer or a supercomputer); Hereinafter referred to as “computer”). Since the station monitoring terminals 101A to 103C and the management system 1000 are connected via a network, the contracted power station 1
00A to 100C are centrally monitored.

Here, the in-house monitoring terminals 101A to 101A to 10
3C is connected to the Internet via a telephone line or the like, while the management terminal 1001 is connected to the Internet 11 via a dedicated line or the like. Thus these terminals 10
1A to 101C and the management terminal 1001 are connected via the Internet network 11. The Internet network 11
Other than the above, for example, personal computer communication via a public / private line, a LAN, a wired / wireless dedicated network, or the like can be used.

The computer of the manager terminal 1001 may include a WWW (World Wide Web) browser, and may transmit driving support data described in, for example, HTML to the office monitoring terminal 101A or the like. The computer of the administrator terminal 1001 is, for example, JAVA.
A program described in a (registered trademark) language or the like may be transmitted to the in-house monitoring terminal 101A or the like as driving support data. Further, the information content from the in-house monitoring terminal 101A or the like to the computer of the administrator terminal 1001 may be described in, for example, HTML or may be in an e-mail format. Note that the communication means is not limited to the above-described form, and various forms such as facsimile, telephone, wired / wireless communication, satellite communication, and electric / optical communication can be used.

For communication with the centralized management terminal 1001, a security system (a so-called fire wall or the like) is provided to prohibit access to terminals other than the terminals 101A to 101C of the power plants 100A to 100C that have concluded the operation diagnosis and support management. , Eliminating the intrusion of external third parties.

The database system 2000
The computer of the terminal 2001 may include a WWW browser, and may transmit driving support data described in, for example, HTML to the administrator terminal 1001. The computer of the terminal 2001 of the database system 2000 may transmit a program described in, for example, the JAVA language to the manager terminal 1001 as driving support data. In addition, the database system 2
000 terminal 2001 to the computer of the administrator terminal 1001 may be described in, for example, HTML or may be in an e-mail format.

The terminal 200 of the database system 2000 and the administrator terminal 1001 are protected from intrusion by a third party, for example, by a security system such as a personal identification number that changes periodically. It can also be sent.

Information from the terminal 200 of the database system 2000 is stored in a dedicated terminal such as a CD-ROM, HD, FD, MD,
After confirming a keyword (set for each transmission information) from storage means such as a magnetic tape and various memories, the keyword is displayed on the screen. Note that the specific information transmitted from the terminal 2001 of the database system 2000 is transmitted after a certain period of time (for example, one week).
Alternatively, the content can be automatically erased. In providing this specific information, the charging level may be changed according to the rank of the content.

Hereinafter, an example of monitoring using the water quality diagnosis / support system in the thermal power plant according to the present embodiment shown in FIG. 3 will be described with reference to the processing flowchart of FIG.

From the power plants 100A to 100C, the information 12A to 12C from the water quality sensors provided on the equipment (piping and the like) constituting the power plant are sent to the in-plant monitoring terminals 101A and 101A.
02B, 03C via the central manager terminal 100
Sent to 1. The sensor information 12A to 12C
Is performed in principle through the central control unit, but in an emergency or the like, the information may be sent directly from the portable terminal to the central manager terminal 10001 of the management system 1000 as needed.

The central manager terminal 1001 monitors the operation status of each of the plant facilities 100A, 100B, 100C by centrally managing the sensor information 12A to 12C (S-1). Together with this monitoring, it is determined whether or not various information 12A to 12C from the sensors are normal.

Then, information 12A to 12C from the sensors
Is normal, monitoring is continued as it is (S-
1).

On the other hand, if the information 12A to 12C from the sensors is not normal, for example, if there is any abnormality in the first power plant 101A, an abnormality is found according to the sensor information 12A (S-2). .

The sensor information 12A is given a predetermined rank (for example, level A: plant stop, level B: caution required, level C: caution, level D: minor warning), and the rank of the warning corresponding to the level is given. Attachment is determined (S-3).

The warning ranking is not particularly problematic if the contents of the ranking are predetermined, but if the contents of the ranking are not specified, the plant operation is performed as necessary. Diagnosis / support database 100
2. Central management system 100 with reference to contents of 2000
Diagnose at 0 to make a diagnosis. Further, the above-described ranking may be always performed based on the latest data updated with reference to the plant operation diagnosis / support database 1002.

According to the diagnosis status in the centralized management system 1000, the operation manager sends the 13A contents such as an instruction to take measures to the operation manager of the plant equipment (first plant equipment 100A) which has issued the warning about the plant operation handling information. (S-4
-1 to S-4-3), the operation manager takes an operation plan and a countermeasure according to the instruction.

In the centralized management system 1000, experienced personnel and managers are resident on a 24-hour basis so that any abnormalities such as accidents can be dealt with at any time. As a result, it is possible to centrally and collectively monitor the contents of decisions that had been made at individual power plants in the past and on a 24-hour basis, and to make accurate decisions with reference to various databases. Will be able to respond quickly.

In the present embodiment, each of the power plants 100A
Samples 105A to 105C collected at １００100C
Is a centralized management system 10 for performing separate chemical analysis.
00, in this system, the chemical analysis 1003 is performed centrally, and the analysis information is sent to the chemical analysis terminal 10.
04 and displays the information on the central management terminal 1001.
To be sent to As a result, since there is no error or variation in the accuracy of various analyses, and only the latest system needs to be provided in the management system 1000, the number of personnel can be reduced and the analysis accuracy can be improved.

Hereinafter, the elements of water quality diagnosis in the thermal power plant will be described.

FIG. 5 shows an example of a water use system in a thermal power plant. As shown in FIG. 5, raw water (land water, seawater, river water) 30 is treated with raw water (chlorine coagulation sedimentation treatment,
Filtration treatment 31) and desalination treatment (RO membrane treatment, MSF
Processing) 32 and a pure water production apparatus (ion exchange etc.) 33
And then used as boiler / water supply 34. The boiler / water supply 34 includes a pre-boiler system 35,
A boiler 36 and a turbine 37 are used in this order, and a cooling water system 38 is appropriately used as necessary, and their wastewater is treated by a wastewater treatment 39.

In the present embodiment, the water quality management in the plant operation diagnosis / support system shown in FIG. 3 refers to monitoring the water quality in the boiler / feed water quality management range 40 in the dashed area in FIG. The present invention is not limited to monitoring of water quality only, but can be applied to various analysis targets of a plant.

FIG. 6 is a schematic diagram showing an example of a thermal power plant system using a once-through boiler. As shown in FIG. 6, a thermal power plant includes a condenser 51 for cooling turbine water from a turbine 50 and condensing water, and a condenser 52 for condensing water from the condenser 51 by a condenser pump 53. A desalination device 55 for supplying salt through the condensate 52 to remove salts in the condensate 52; a low-pressure heater 56 for heating the desalinated condensate under low-pressure conditions; A vaporizer 57, a storage tank 58 for storing the degassed water, a high-pressure heater 61 for heating water supply 60 supplied from the storage tank 58 via a water supply pump 59 under high-pressure conditions, and a high-pressure heating water supply 60. And a boiler 63 provided with a economizer 62 for supplying steam to the turbine 50 as high-temperature and high-pressure steam.

Boiler / water supply 3 from raw water 30 shown in FIG.
The pure water 64, which is 4, is stored in a makeup water tank 65, and is supplied to the condenser 51 from here.

In FIG. 6, reference numeral 66 denotes a low-pressure heater 56.
A cooler for cooling the condensed water 52 is shown on the upstream side, a drain tank 67 provided in the low-pressure heater 56, and a water separator 68 provided in the boiler 63.

In the thermal power plant shown in FIG. 6, for example, a pH meter 70, an acid conductivity meter (HμS meter) 71,
Various sensors such as an electric conductivity meter (μS meter) 72, a turbidity meter 73, a dissolved oxygen meter 74, and a hydrazine meter 75 are provided. Further, cameras are installed at various parts of the plant equipment, and the state inside the plant equipment is transmitted as image information (for example, the state of the amount of generated steam).

In the above-mentioned sensor, various chemical analysis indices can be measured online. In addition, a raw sample is collected at a predetermined location, and as a collected sample 105,
I send it to the management system.

In the present invention, the sensor information serving as an index of the water quality management is defined as follows. (1) pH measured by the pH meter 71 The pH is a measure of the hydrogen ion concentration in the solution,
It is expressed by the common logarithm of the reciprocal of the hydrogen ion concentration. pH is
It is one of the important parameters for corrosion prevention.Ammonia (NH ₃ ) and hydrazine (N ₂ H4) are supplied in the feed water, and sodium phosphate (Na ₂ HPO ₄ , Na ₃ P
O ₄ ), sodium hydroxide (NaOH) and the like are used to control the value within an appropriate value in a neutral to alkaline range.

(2) The acid conductivity meter (HμS meter) 7
1. Acid electric conductivity and electric conductivity measured by an electric conductivity meter (μS meter) 72 The electric conductivity is obtained by measuring the electric resistance (Ω) of the solution between the electrodes having a sectional area of 1 cm ² and a distance of 1 cm. · Cm) and is expressed in S / cm (Siemens / centimeter). Since this value varies depending on the temperature, it is usually expressed as a value at 25 ° C. The electric conductivity is measured to know the approximate values of the concentration of water treatment chemicals (for pH adjustment) in feed water and boiler water and the concentration of soluble salts existing as impurities. The higher the soluble impurity concentration, the higher the value of the electric conductivity. Also,
Electric conductivity after passing through a column filled with a hydrogen-type strongly acidic cation exchange resin (generally called a cation resin) in order to know the approximate value of the concentration of a small amount of soluble salts other than water treatment chemicals during the treatment of volatile substances (Acid electrical conductivity). The electric conductivity is related to dissociated ions in a solution, for example, Na ⁺ and Cl ⁻ and H ⁺ and OH ^{− of} water in an aqueous NaCl solution (brine), and the concentration determines the value. Acid conductivity is mainly used for monitoring seawater leaks in condenser tubing. This is because the acid electric conductivity can detect the presence of salts in the condensate and feed water with higher sensitivity than the electric conductivity.

(3) The dissolved oxygen in the dissolved oxygen water measured by the dissolved oxygen meter 74 is a main impurity that corrodes the metal material on the water side of the boiler plant. Corrosion due to dissolved oxygen
Often occurs in the form of pitting. Generally, the corrosion reaction occurs electrochemically. Even if the pH of the feedwater is neutral or alkaline, the following reaction occurs when dissolved oxygen is present in the water. Fe + H ₂ O + _1/2 O ₂ → Fe (OH) ₂ ... As can be seen from the formula, iron (II) hydroxide eluted from the steel surface into the water is further oxidized by dissolved oxygen in the water as shown in the formula and becomes hydroxylated. 2Fe (OH) ₂ + H ₂ O + 1 / 2O ₂ → 2Fe (OH) ₃ that becomes iron (III) This iron hydroxide (III) has a lower solubility in water than iron hydroxide (II). When the concentration of electrolyte in water is extremely low and the concentration of dissolved oxygen is adjusted to be 0.2 mg O / L (200 ppb) or less, an insoluble oxide film of iron (III) hydroxide is formed on the steel surface. Formed and the subsequent progress of corrosion is suppressed. A treatment method based on such a concept is an oxygen treatment (see 1.3 Types of Water Treatment). In addition, when ammonia coexists with a copper alloy, tetraammine copper is formed as shown in the equation, and corrosion occurs. Cu + 1 / 2O ₂ + 4NH ₃ + H ₂ O → [Cu (NH ₃ ) ₄ ] (OH) ₂ ... The solubility of oxygen in water differs depending on temperature and pressure. At the same pressure, the higher the temperature, the lower the solubility.

(6) Hydrazine measured by hydrazine meter 75 Hydrazine is injected into a water supply system to reduce and remove dissolved oxygen, thereby preventing plant corrosion. In hydrazine, one hydrogen atom of ammonia (NH ₃ ) is replaced with an amino group (—NH ₂ )
It can be considered as a compound substituted with one. In addition, it has a strong bond with water and exists as a hydrate (N ₂ H ₄ .H ₂ O).

(7) Turbidity measured by a turbidimeter 73 The turbidity indicates the degree of turbidity of water, and is often used as a measure of the suspended iron content in water supply and boiler water. As a standard of turbidity, fine kaolin is used, and the unit is “degree”.

Table 1 below shows an example of the installation location of the sensor and the alarm set value. Table 1 shows the installation location of the sensor in the plant, the measurement range, the alarm set value (high / low), and the unit, but the present invention is not limited to this.

[0080]

[Table 1]

An example of the water quality of the once-through boiler is shown in Table 2 below. It should be noted that the volatile substance treatment is one in which dehydration with hydrazine is performed, and the water quality level is different from that in the case of oxygen treatment.

[0082]

[Table 2]

Table 3 below shows the quality of steam generated from the boiler.

[0084]

[Table 3]

An example of analyzing a plant sample in a management system is shown in Table 4 below.

[0086]

[Table 4]

In the above-described thermal power plant equipment, the following monitoring is performed in the centralized management system 1000.

[During Normal Operation] FIG. 7 is a schematic diagram of a network connection diagram of the operation diagnosis / support system for thermal power plant equipment during normal operation. Communication network 11 such as Internet communication
Via the first power plant 100A, the second power plant 100
B, the on-site monitoring terminals 101A to 103D provided in the facilities of the third power plant 100C and the fourth power plant 100D, respectively, about four times a day in the plant (there may be more at specific locations). Are stored. This accumulated information is sent from the in-house monitoring terminals 101A to 103D to the central management terminal 1001 of the central management system 1000.
Via the communication network 11 as sensor information 12A to 12D.

FIG. 8 is an example of a screen 82 showing the outline of the thermal power plant layout 81 shown in FIG. 6 on the display device of the central control terminal 1001.

FIG. 9 shows an example of a screen 83 when all the power plant equipment is displayed collectively. The outline is that of FIG. 8, where 81A is the plant layout of the first power plant, 81B is the plant layout of the second power plant, 81C is the plant layout of the third power plant,
81D is a plant layout of the fourth power plant.

Next, the contents of processing performed in the management system based on the sensor information described above will be specifically described. FIG.
0 is an example of a screen 84A showing a comparison with past operation results in the first power plant 100A.

For example, when the unit of the power generation facility is started, the water quality at a predetermined location is monitored. This monitoring compares with past performance. On a screen 84A shown in FIG. 10, a plant layout is displayed on 84-1A, a plant start-up time is displayed on 84-2A, and a change in turbidity is displayed on 84-3A. Here, the plant startup time is displayed.
In the case of A, in the steps 1 to 5, the plant start time is compared with the previous time and the current time. When the change 84-3A of the turbidity is displayed, the transition of the change of the turbidity by the turbidity meter 73 is shown. It should be noted that other various sensor information can be displayed on the screen by being appropriately switched according to an instruction.

In this state, the unit is started, and if there is no abnormality, the water quality at the time of power supply (startup operation completed) is checked.

On the other hand, the collected samples 105A to 105A
D is sent to the management center 1000 once a week, and based on this regular analysis result, the evaluation of the regular analysis result and the evaluation of the instrument calibration are performed. FIG. 11 shows a display 85A of the outline of this calibration. As shown in FIG. 3, this calibration is performed based on the analysis result 1 of the chemical analysis 1003 of the sample 105A collected from each collection point of the first power plant 100A.
Calibration is performed by comparing 004 with a value indicated by an instrument sent online.

In the case shown in FIG. 11, the values of pH, electric conductivity (EC), oxygen concentration and hydrazine concentration are measured manually (sampled sample analysis) and measured (measured by a sensor device).
This is done by comparing with the case. 85-1A
Indicates a result of the comparison, and 85-2A indicates a plant layout, which can display a sampling location (not shown). 85-3A is p at the economizer inlet
FIG. 3 is a diagram showing the relationship between H and electric conductivity (EC) (open circles in the figure indicate values obtained by manually analyzing a collected sample, and black circles indicate values measured by an instrument).

As described above, in normal operation, it is always checked whether or not the monitoring system is in perfect condition to prepare for an alarm or an abnormal situation.

[During Alarm Operation] FIG. 12 is a schematic diagram of a network diagram of an operation diagnosis / support system for a thermal power plant when an alarm is generated.

Here, description will be made on the assumption that seawater has leaked at the first power plant 100A. FIG. 13 shows the state of the pH of the feedwater in the case of chemical treatment (hydrazine treatment). In the case where the pH has fallen below the lower limit reference value due to leakage of seawater (for example, in this example, the pH of the lower limit reference value is reduced). 8.5).

When there is this pH sensor information,
First, it is determined whether there is any abnormality in the check of the instrument instruction (the calibration instruction and the confirmation of a plurality of instruments). Setting of a warning level (action level) and collection of information are started according to the degree of the sensor information. The details of these processes will be described later.

FIG. 1 shows a screen for displaying the state of the alarm at this time.
It is shown in FIG. As shown in FIG. 14, the monitoring of the alarm duration is performed on the screen 86A of the management terminal 1001 of the management center 1000.

On the other hand, during this time, the contents of the warning of the first power plant 100A are displayed 87A and the states of the other power plants 100B to 100D are also displayed 87B to 87D as shown on a screen 87 in FIG. Monitor as appropriate.

When the above-mentioned alarm is issued, the terminal 1001 of the management system 1000 makes a judgment according to the contents of the alarm. FIG. 16 shows a screen 88 of the management terminal 1001.
The procedure of the determination is shown in a flowchart 89 together with the display of the layout 81A of the first power plant 100A in (1), the display of the warning location (the warning is performed, for example, by flashing a red lamp or the like: not shown).

FIG. 17 shows an example of a specific flowchart 89 of this determination procedure. As shown in the determination flowchart 89 of FIG. 17, first, monitoring is continued based on the information 12A to 12D sent to the management terminal 1001 (S
-10).

Next, when the sensor information 12A having the increased electric conductivity due to seawater or an example enters at the outlet of the condenser 51, it is confirmed whether or not the electric conductivity is equal to or more than the specified value of 0.05 mS / m. (S-11: First checkpoint). Here, if the value is equal to or less than the specified value (NO), the process returns to continuation of monitoring and continues monitoring (S-10).

If it is determined at the first check point (S-11) that the measured value exceeds the specified value, it is confirmed whether or not the meter of the electric conductivity meter 72 is normal (S-12). As an example of this confirmation, it is checked whether the flow rate is reduced (adjust if there is a decrease), whether the resin is deteriorated (if it is deteriorated, replace it), and the like.

After checking the meter (S-13), if the value falls below the specified value (in the case of NO), the process returns to the monitoring continuation and the monitoring is continued (S-10).

After the confirmation of the meter (S-13), if the electric conductivity is still higher than the specified value (first YE
In the case of S: 1Y), it is confirmed whether or not the acid electric conductivity after the cation is equal to or more than the specified value of 0.05 mS / m (S-14: second check point). here,
If it is less than the specified value (in the case of NO), the process returns to the monitoring continuation and the monitoring is continued (S-10).

If it is determined at the second check point (S-14) that the value exceeds the specified value, it is confirmed whether the meter of the acid conductivity meter 71 is normal or not (S-15). .
For example, this check is performed to determine whether the flow rate has decreased (if there is a decrease, adjust the flow rate), whether the resin has deteriorated (if it has deteriorated, replace the resin), and the like.

After checking the meter (S-16), if the value falls below the specified value (in the case of NO), the process returns to continuation of monitoring and continues monitoring (S-10).

Even after checking the meter (S-16), if the electric conductivity is still higher than the specified value (in the case of the second YES: 2Y), the acid electric conductivity at the inlet of the economizer 62 It is checked whether or not is more than the specified value of 0.05 mS / m (S-17: third check point). Here, if the value is equal to or less than the specified value (NO), the process returns to continuation of monitoring and continues monitoring (S-10).

At the third check point (S-17), if the value exceeds the specified value (the third YE
In the case of S: 3Y), seawater leakage is determined (S-1).
8). Thereafter, the operation manager of the first power plant is instructed to execute the treatment (S-19). That is, even if the information from the sensor gives an alarm, the first and second checkpoints S-11 and S-12 cannot yet be determined to be seawater leaks, but the third checkpoint S If the value of the electric conductivity is still higher than the predetermined value even at −17, it is determined that the seawater is leaking, and the action can be taken promptly.

Table 5 below shows an example of the content of the judgment level and an example of the treatment. Level I is a small leak,
Level II is a minute leak, which can be recovered by a prescribed measure. Level III is a heavy leak that requires an immediate unit shutdown.

[0113]

[Table 5]

Database 1002 and / or 200
Referring to 0, the factor is estimated.

FIG. 18 shows a screen 90 for referring to an external database system 2000 for determination. FIG.
As shown in the figure, the screen 90 shows the management terminal
01, a field for inputting an ID or password for specifying that the information is an alarm, the alarm status, the current status, the information to be referenced, and the plant name managed by the management terminal 1001 (such as the first power plant 100A). ), Input necessary information such as the unit name and the presence or absence of contact from the manufacturer. In addition, it is also possible to specify the management terminal using electronic authentication or the like.

Table 6 below shows an example of major troubles caused by water and countermeasures. Information as shown in “Table 6” can be obtained from the database system 2000 as information.

[Table 6] In the external database system 2000, since this information is updated with various latest information, it is possible to take the latest corresponding action than the own management database 1002.

On the basis of this determination situation, as shown in FIG. 19, a display 91 of a trouble which is expected to occur is made. The display 91 shows the plant layout 91-1A, the expected nonconformity 91-2A, and the change of the monitoring instrument value over time (for example, p.
H, electric conductivity, etc.) 91-3A are displayed.

Along with the continuous monitoring of the alarm, the occurrence of a trouble is monitored. If necessary, as shown in FIG. 12, the number of times of sampling (one or more times per week is changed to two or more times) or the sensor information 12A from the in-house monitoring terminal 101A.
The transmission frequency (once a minute) of the management system 100
Enhance the input information processed within 0.

[At the time of occurrence of accident (during operation)] A treatment program is displayed for the operator. From the management terminal 1001 to the database 1002 and / or
Alternatively, a case and a treatment method are searched by using 2000 (see FIGS. 18 and 19). Select the response time according to the alarm level. Report to the manufacturer as necessary.

[At the time of occurrence of accident (stop)] For example, in the case of the alarm level shown in Table 5, when the level becomes level III, the management terminal 1001 displays the stop treatment program to the operator. In addition, the management terminal 1001 sends a notification to the related predetermined organization as needed.

[After Accident (Recovery Measure)] The management terminal 1001 searches the database 1002 and / or 2000 for cases and treatment methods (see FIGS. 18 and 19). The inspection menu is displayed on the office terminal 100A.
FIG. 20 is a chart 92 showing an example of a restoration process after a seawater leak accident as an example. As shown in FIG. 20, a recovery program is shown for each of the boiler, turbine, and heater.

Further, related information is collected as needed. In the management system 1000, accident cause data,
Various information such as restoration data is collected, and a database is created from the collected information.

As described above, the plant operation diagnosis / support system can prevent accidents in a plurality of thermal power plants. In addition, even if an accident occurs, it is possible to respond quickly. Especially in the case of a new plant, there is no past accumulated data,
According to the present invention, it is possible to refer to past cases in other plants or to refer to a vast database of external organizations, and it is possible to respond appropriately according to the present invention. it can.

In the present invention, sensor information from the plant is collectively collected using a network or the like, but the final judgment is made by an appropriate instruction from the management terminal 1001.
The operation manager can take quick response measures such as stopping the plant.

Further, a plurality of power plants 100A to 100A
By centrally managing the OCs in a lump, it is possible to eliminate the need for an experienced person in charge of chemical analysis to be placed at a power plant or to reduce the number of personnel.

Since the management system 1000 can give an accurate operation instruction based on the data to the operation manager of the power plant, and since the power supply can be adjusted on the management system, the alarm is issued. Even if the operating efficiency of the power plant where the power generation is reduced is reduced, the power supply amount is not significantly reduced by improving the operating efficiency of the other power plants.

In the event of an accident or a warning, each power plant accesses the database system 2000 on the user management system 1000 side instead of individually accessing an external third party database system. There is no leakage of warnings and accident information to the outside regarding whether the case was at a power plant. Also, since you can refer to a huge database of third parties that are manufacturers,
It contributes to expediting the examination of response measures for accidents and the like.

The operation data can be compared with the past and other power plants, and the operation efficiency can be improved.

Further, similar accident examples can be transmitted to the power plants 100A to 100C contracted by the management system 1000, and recurrence of the accident can be prevented.

[0130]

As described above, according to the present invention,
In-house monitoring terminals provided in each of at least two or more plant facilities, including a centralized management terminal of a centralized management system capable of communicating with each other through a network,
The information from the various sensors provided in the members and devices constituting the plant equipment is sent to the central manager terminal via the in-house monitoring terminal of the plant equipment, and the sensor information is centrally managed by the central manager terminal. Monitor the operation status of each plant equipment and determine whether the information from the sensor is normal.If the information from the sensor is normal, continue monitoring as it is, and if the information from the sensor is normal. If not, it judges the alarm ranking according to the level of the sensor information based on the plant operation diagnosis and support database, and diagnoses and supports the plant operation contents according to the alarm ranking, so that the information is centralized and centralized. The management can be performed, and the instruction of the treatment according to the content of the sensor information can be accurately performed.

[0131] In the above invention, the sensor comprises a temperature,
Since any one of pressure, vibration, current value, chemical index value, flow rate, and image or a combination of two or more of these information is used, by referring to and comparing a plurality of parameter information, analysis accuracy is improved and more accurate Can make decisions.

In the above invention, since the plant operation diagnosis / support database is in the centralized management system provided with the centralized management terminal, it is possible to take an immediate measure.

In the above invention, the centralized management terminal and the database system terminal capable of communicating with each other through a network or a dedicated line via a security system are provided, and the database system provides a database according to the warning level. Therefore, it is possible to refer to a huge number of databases of external organizations, and to take more appropriate measures based on constantly updated latest information. In the event of an accident or warning, if the plant equipment accesses an external third-party database system, the location of the accident can be known. Since the system is accessed, there is no leakage of which plant equipment is the case.

In the above invention, the centralized management system instructs adjustment of the operation contents of each plant, so that the adjustment for each plant can be unified.

In the above invention, when the plant equipment is a thermal power plant equipment, by judging the water quality of the water supply of the plant equipment or the boiler water, the management of the thermal power generation equipment can be unified, and when an accident or the like occurs. But they can respond quickly.

[Brief description of the drawings]

FIG. 1 is a network connection diagram of a diagnosis / support system for plant equipment.

FIG. 2 is an outline of an application example of a network connection diagram of a diagnosis / support system for plant equipment.

FIG. 3 is a network connection diagram of a diagnosis / support system for thermal power plant equipment.

FIG. 4 is a diagram showing an example of a processing flowchart.

FIG. 5 is a diagram showing an example of a water use system in a thermal power plant.

FIG. 6 is a schematic diagram of an example of a thermal power plant system using a once-through boiler.

FIG. 7 is a network connection diagram of an operation diagnosis / support system for a thermal power plant during normal operation.

FIG. 8 is a diagram illustrating an example of a screen displayed on the display device of the central management terminal.

FIG. 9 is a diagram showing an example of a screen when all the power generation plant equipment are displayed collectively.

FIG. 10 is a diagram showing an example of a screen showing a comparison with past performance at a first power plant.

FIG. 11 is a diagram showing an example of a screen showing the status of the sensor calibration at the first power plant.

FIG. 12: Operational diagnosis of thermal power plant equipment when an alarm occurs
It is a network connection diagram of a support system.

FIG. 13 is a diagram illustrating an example of the relationship between the pH of supply water and time.

FIG. 14 is a diagram illustrating an example of a screen displaying a state in which an alarm has occurred.

FIG. 15 is a diagram showing an example of a screen when collectively displaying each power plant equipment when an alarm occurs.

FIG. 16 is a diagram showing an example of a screen showing a flowchart of a layout of an alarm generation facility and a procedure of determination.

FIG. 17 is a diagram illustrating an example of a specific flowchart of a determination procedure.

FIG. 18 is a diagram showing an example of a screen for referring to an external database system for determination.

FIG. 19 is a diagram illustrating an example of a screen illustrating an example of a layout of a warning generating facility and a display of a non-conformity expected to be determined.

FIG. 20 is a chart showing an example of a restoration process after a seawater leakage accident.

FIG. 21 is a diagram showing a flow of information on plant equipment in the related art.

[Explanation of symbols]

 11 Communication network such as Internet communication 12A to 12C First to third sensor information 13A to 13C First to third instruction information 100A to 100C First to third plant equipment 100A to 101C First to third in-house monitoring terminals 1000 Centralized Management system 1001 Central management terminal 2000 Database system 2001 Terminal

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masanobu Nagao 1-1, Akunouramachi, Nagasaki-shi, Nagasaki F-term in Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard 5C087 AA02 AA03 AA09 AA10 AA24 BB03 BB12 BB74 DD03 DD22 EE07 EE16 EE20 FF01 FF02 FF04 FF19 FF20 GG07 GG18 GG23 GG66 GG67 5H223 AA02 BB02 BB08 BB10 DD03 DD07 DD09 EE06 5K048 BA23 EB08 EB12 GB03

Claims (22)

[Claims] 1. An in-plant monitoring terminal provided in each of at least two or more plant facilities, and a central management terminal of a central management system capable of communicating with each other through a network, constituting the plant facility. Information from various sensors provided on the members and devices is sent to the central manager terminal via the in-house monitoring terminal of the plant facility, and the sensor information is centrally managed by the central manager terminal to operate each plant facility. In addition to monitoring the status, determine whether the information from the sensor is normal.If the information from the sensor is normal, continue monitoring as it is.If the information from the sensor is not normal, Of the plant according to the above-mentioned alarm ranking.
A plant operation diagnosis and support system characterized by supporting. 2. The plant operation diagnosis and support system according to claim 1, further comprising a plant operation diagnosis and support database for determining the ranking.
Support system. 3. The plant operation diagnosis / support system according to claim 2, wherein the plant operation diagnosis / support database is in a centralized management system provided with a central management terminal. 4. The external device according to claim 2, further comprising a database system terminal capable of communicating with the centralized management terminal and a network or a dedicated line via a security system, and providing a database corresponding to a warning level. A plant operation diagnosis and support system characterized by including a database system of (1). 5. The plant according to claim 1, wherein the sensor is any one of temperature, pressure, vibration, current value, chemical index value, flow rate, image, or a combination of two or more of these. Driving diagnosis and support system. 6. The plant operation diagnosis / support system according to claim 1, wherein two or more plant facilities are of the same manufacturer or different manufacturers. 7. The plant operation diagnosis / support according to claim 1, wherein the communication to the central management terminal has a security system for prohibiting access to terminals other than the terminal of the plant facility which has concluded the operation diagnosis / support management. system. 8. The plant operation diagnosis / support system according to claim 1, wherein the chemical analysis of the sample collected by the plant equipment is performed by the centralized management system, and the analysis information is sent to the centralized management terminal. 9. The plant operation diagnosis / support system according to claim 1, wherein the centralized management system instructs adjustment of the operation contents of each plant. 10. The plant operation diagnosis / support system according to claim 1, wherein the plant equipment is a thermal power plant equipment. 11. The system according to claim 10, wherein the sensor information is water quality of thermal power plant equipment. 12. The plant operation diagnosis / support system according to claim 11, wherein the water quality of the thermal power plant equipment is any one of condensed water quality, feed water quality, and boiler water quality. 13. The method according to claim 11, wherein the water quality sensor of the thermal power plant equipment is a silica meter, an electric conductivity meter, a pH meter, a hydrazine meter, a dissolved oxygen meter, a turbidity meter, or a combination thereof. Characteristic plant operation diagnosis and support system. 14. The plant operation diagnosis / support system according to claim 10, wherein the centralized management system issues an instruction to adjust the power generation capacity of each plant. 15. A member / apparatus comprising said plant facility, comprising an in-house monitoring terminal provided at each facility of at least two or more plant facilities, and a central management terminal capable of communicating with each other through a network. Information from the various sensors provided is sent to the above-mentioned terminal for centralized manager via the in-house monitoring terminal of the plant equipment, and the centralized manager's terminal centrally manages the sensor information to monitor the operation status of each plant equipment. Also, determine whether the information from the sensor is normal or abnormal.If the information from the sensor is normal, continue monitoring.If the information from the sensor is abnormal, A method for diagnosing and supporting plant operation, comprising determining a ranking according to the condition and diagnosing and supporting plant operation contents. 16. The method according to claim 15, wherein when the ranking is determined, a plant operation diagnosis /
A plant operation diagnosis / support method using a support database. 17. The method according to claim 15, wherein the plant equipment is a thermal power plant equipment. 18. The method according to claim 15, wherein the sensor information is water quality of thermal power plant equipment. 19. An in-house monitoring terminal provided at each of at least two or more plant facilities and a central control terminal capable of communicating with each other through a network to diagnose and support the operation contents of the plant facilities. At this time, information from various sensors provided in the members and devices constituting the plant equipment is sent to the central manager terminal via the in-house monitoring terminal of the plant equipment, and the sensor information is sent to the central manager terminal. In addition to monitoring the operation status of each plant facility by centralized management, determine whether the information from the sensor is normal or abnormal, and if the information from the sensor is normal, continue monitoring as it is If the information from the system is abnormal, a ranking is determined according to each abnormal level, and a program for controlling the computer to diagnose and support the operation of the plant. A recording medium storing a program. 20. The method according to claim 19, wherein when the ranking is determined, a plant operation diagnosis /
A recording medium characterized by using a support database. 21. The recording medium according to claim 19, wherein said plant equipment is a thermal power plant equipment. 22. The recording medium according to claim 19, wherein the sensor information is water quality of thermal power plant equipment.