JP2004185202A - Sensor attachment type plant apparatus, and plant monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a fire or trouble owing to slag adhesion by monitoring a plant in a high temperature part. <P>SOLUTION: Radio tags (sensor mounting type radio tags 20) with a temperature sensor connected thereto are covered by a heat resistance material, and are favorably mounted on arbitrary places in plant constituting apparatuses (burners 6, 7), so as to perform radio communication with a plant monitoring device in a central monitor room. The plant monitoring device successively establishes links for connection to not less than one radio tags, receives measurement information by the temperature sensor by radio wave, and monitors the temperature distribution of the plant constituting apparatuses. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention particularly relates to a sensor-equipped plant device and a plant monitoring system suitable for use in a thermal power plant component device such as a boiler and an auxiliary boiler.
[0002]
[Prior art]
In a thermal power plant, there are boiler troubles caused by fire, slag (furnace ash) adhesion, etc., and any of them can be dealt with by measuring the temperature of each part of the boiler.
Further, a flag may adhere to the inside of the boiler tube and fall suddenly, thereby deteriorating the combustion efficiency. In some cases, the heat exchange tube comes into contact with the combustion gas and becomes locally high in temperature and cracks (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-11-132406
[Problems to be solved by the invention]
In order to avoid these troubles, the temperature of each part of the boiler is measured, and diagnosis is performed in the central monitoring room.However, it is extremely difficult to install and route the wiring with a thermocouple that serves as a temperature sensor. In particular, a thermocouple may be broken by heat at a place where it comes into contact with the combustion gas.
Specifically, the temperature of the tip of the thermocouple in contact with the tube is 500 ° C, and the temperature of the portion away from the tube and in contact with the fuel gas is as high as 1500 ° C. Is minimal. Therefore, under the current situation where a thermocouple is added near the trouble site only after a trouble has occurred, it is not possible to prevent a trouble such as a fire.
[0005]
The present invention has been made in view of the above circumstances, and covers a wireless tag to which a temperature sensor is connected with a heat-resistant material, and is preferably mounted at any part of a plant component in a manufacturing stage, and a central monitoring room is provided. It is an object of the present invention to provide a sensor-equipped plant device and a plant monitoring system which can prevent a trouble due to a fire or slag adhesion by performing wireless communication with a computer located in the plant.
[0006]
[Means for Solving the Problems]
The sensor-equipped plant device of the present invention includes a plant component device, and one or more wireless tags that are covered with a heat-resistant material and connected to a temperature sensor mounted at an arbitrary position of the plant component device. Features.
[0007]
According to the present invention, by covering a wireless tag to which a temperature sensor is connected with a heat-resistant material and mounting it at an arbitrary location of a plant component device, temperature measurement can be continuously performed even in a high-temperature environment. Therefore, it is possible to prevent troubles caused by fire and slag adhesion.
[0008]
Further, in the present invention, the wireless tag is mounted on the plant component device in advance in a manufacturing stage together with the temperature sensor.
[0009]
According to the present invention, since the wireless tag is pre-mounted on a plant component at the manufacturing stage together with the temperature sensor, it is possible to measure a precise temperature distribution from a number of measuring points depending on the mounting interval of the wireless tag, Monitoring reliability can be increased.
[0010]
In the present invention, the wireless tag includes an A / D converter that captures at least temperature information measured by the temperature sensor, an ID memory that stores an identifier indicating a mounting location of the plant equipment, A wireless transmission / reception circuit for wirelessly transmitting the temperature information taken in by the D converter and the identifier recorded in the ID memory.
[0011]
According to the present invention, a wireless tag mounted on a plant component device is installed in a central monitoring room by wirelessly transmitting temperature information taken in by an A / D converter and an identifier recorded in an ID memory. The temperature distribution can be diagnosed by a plant monitoring device to be performed, and data communication is performed using a wireless communication medium, thereby relieving the burden of wiring and construction.
[0012]
The plant monitoring system according to the present invention includes a plant component device, at least one wireless tag covered with a heat-resistant material, and connected to a temperature sensor mounted at an arbitrary position of the plant component device, and the at least one wireless tag. And a plant monitoring device that establishes a link for sequential connection with the plant, wirelessly receives information measured by the temperature sensor, and monitors the temperature distribution of the plant component devices.
[0013]
According to the present invention, the plant monitoring device establishes a link for sequential connection with one or more wireless tags, receives measurement information by a temperature sensor wirelessly, and monitors the temperature distribution of the plant components, Since the wireless communication is realized without depending on the disadvantageous wire in a high temperature environment, highly reliable plant monitoring can be realized. In addition, since there is no need to take into consideration construction such as routing of wiring, the burden for that is eliminated.
[0014]
Further, according to the present invention, the facility for taking measures for recovery of the plant components is driven depending on the diagnosis result of the plant monitoring device.
[0015]
According to the present invention, depending on the diagnosis result of the plant monitoring device, the equipment installed in the vicinity is driven in advance to take measures for recovery of the plant components, so that the restoration of the plant components is accelerated. And the operation rate as a plant can be improved.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a diagram showing an example of a sensor-equipped plant device according to the present invention, in which a burner is shown as a plant component device.
As shown in FIG. 1, the burner is configured integrally with a conch burner 6 having a high pulverized coal concentration and a weak burner 7 having a low pulverized coal concentration. Each of the conch burner 6 and the weak burner 7 is composed of a pulverized coal pipe 5 arranged at the center, a square air wind box 9 surrounding the pipe, a square pulverized coal nozzle 10 connected to the outlet, and a secondary air nozzle 11. Is done.
The pulverized coal conveyed through the pulverized coal delivery pipe 1 together with the primary air is distributed and supplied to the conch burner 6 and the weak burner 7 by the action of the distributor 3, and is supplied to the furnace through the pulverized coal pipe 5 and the pulverized coal nozzle 10. After being injected into the secondary air nozzle 11, the secondary air 8 is mixed and diffused with the secondary air 8 injected through the secondary air nozzle 11 and burned.
[0017]
A feature of the present invention is that a plurality of wireless tags (hereinafter, referred to as sensor-mounted wireless tags 20) in which a temperature sensor covered with a heat-resistant material is connected to the inner walls of the burners 6, 7 are burners 6, 7, respectively. Embedded in the manufacturing stage. The sensor-mounted wireless tags 20 are continuously arranged at predetermined positions on the inner walls of the burners 6 and 7 at predetermined intervals and embedded therein.
Here, the temperature information measured by the sensor-mounted wireless tag 20 is transmitted to the plant monitoring device when an operator (not shown) installed nearby or a portable terminal equipped with a transceiver approaches. Then, the temperature distribution inside the burner is calculated in the plant monitoring device, and when an abnormality is detected, recovery measures such as watering are performed.
Note that the wireless tag is a battery-less data transmission / reception circuit that operates when an electromagnetic wave is supplied from the outside, and has an internal configuration shown in FIG.
[0018]
As shown in FIG. 2, the wireless tag includes an A / D (Analog / Digital) converter 21, an ID memory 22, and a wireless transmission / reception circuit 23 which are commonly connected to an internal bus 25 of a CPU 24. I have.
The A / D converter 21 has a function of acquiring measurement information obtained through a connected temperature sensor and wirelessly transmitting the measurement information to a plant monitoring device via an antenna installed in the vicinity via a wireless transmission / reception circuit 23. . The ID memory 22 stores identifier information (ID) uniquely assigned to each of the temperature sensors. The ID information is wirelessly transmitted via the antenna together with the temperature measurement information, and the plant monitoring device determines the mounting position. It is the source data for identifying and performing recovery measures.
The CPU 24 is used to receive a command related to re-measurement or the like from the plant monitoring device and execute the command, but is not an essential component for realizing the present invention.
[0019]
FIG. 3 is a flowchart illustrating a flow of a process performed by the plant monitoring apparatus. The plant monitoring apparatus first performs a process for establishing a connection link with the plurality of sensor-mounted wireless tags 20, and sequentially connects to the plurality of sensor-mounted wireless tags 20 to obtain temperature information measured by the temperature sensor. In addition, preparations are made to capture the ID (S31).
Then, the temperature measurement information and the ID are sequentially fetched from the sensor-mounted wireless tag 20 to which the connection link has been established (S32). In particular, the temperature measurement information is accumulated in a time series for a predetermined time and the change is monitored. . Further, by calculating the entire temperature distribution (S33) and comparing it with the threshold information stored in the database in advance, an abnormality in the burners 6, 7 is detected (S34), and an abnormal portion is specified. (S35). The abnormal location can be specified by searching a mounting position table for each ID of the wireless tag prepared in advance in the database. After detecting the abnormality, a recovery measure is taken by driving a separately added recovery facility (S36).
[0020]
In the above-described embodiment, an example in which the sensor-mounted wireless tag 20 is embedded in the inner wall of the burner has been described. However, when the wireless tag 20 is applied to a boiler, it may be embedded in a heat exchange tube. In the heat exchange tube, since the vapor propagating in the tube reaches up to 500 ° C., the heat and the heat exchange tube are to be embedded in the manufacturing stage of the heat exchange tube. Embedding at roughly 1 m intervals, like the burner, achieves the initial goal.
It is also conceivable to use coal in coal storage. That is, a stepladder is placed in advance on a basic portion of a coal storage yard, and a sensor-mounted wireless tag 20 is attached to the stepladder to measure the temperature of the core. That is, in the coal storage, a plurality of sensor-mounted wireless tags 20 are buried in coal. Even if the position of each sensor-mounted wireless tag 20 is not known, the plant monitoring apparatus determines that it is dangerous when temperature information exceeding a threshold value is received from any of the wireless tags 20, and is installed nearby. By driving a certain watering facility or the like to sprinkle water, it is possible to quickly take measures for recovery.
[0021]
In the embodiment of the present invention, only an example of preventing a fire using a temperature sensor has been described. However, by installing a sensor for detecting gas, it is possible to similarly prevent a trouble due to a gas accident. .
[0022]
【The invention's effect】
As described above, according to the present invention, a wireless tag to which a temperature sensor is connected is covered with a heat-resistant material, and is preferably mounted at an arbitrary position of a plant component in a manufacturing stage, and a plant in a central monitoring room is installed. By performing wireless communication with the monitoring device, it is possible to prevent troubles caused by fire or slag adhesion. In addition, since the wireless tag is pre-mounted on plant components at the manufacturing stage together with the temperature sensor, precise measurement of temperature distribution is possible from a number of measuring points depending on the mounting interval of the wireless tag. Can be increased. The present invention is not limited to a thermal power plant, and can also exert effects on a fire in a coal storage plant, a fire in a mill, a burner fire, slag adhesion, tube blasting, and the like.
In addition, depending on the diagnosis result of the plant monitoring device, the equipment installed in the vicinity is driven in advance to take measures for the recovery of the plant components, so that the recovery of the plant components can be accelerated. Operating rate can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a sensor-equipped plant device of the present invention, in which a burner is illustrated.
FIG. 2 is a block diagram showing an internal configuration of a wireless tag used in the present invention.
FIG. 3 is a flowchart showing a processing flow of a plant monitoring device used in the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Pulverized coal distribution pipe, 3 ... Distributor, 5 ... Pulverized coal pipe, 6 ... Conch burner, 7 ... Week burner, 8 ... Secondary air, 9 ... Air wind box, 10 ... Pulverized coal nozzle, 11 ... Secondary air Nozzle, 20 ... sensor mounted wireless tag

Claims (5)

Plant components,
One or more wireless tags that are covered with a heat-resistant material and are connected to a temperature sensor mounted at an arbitrary position of the plant component device;
A sensor-equipped plant device comprising: 2. The sensor-equipped plant equipment according to claim 1, wherein the wireless tag is mounted on the plant constituent equipment in advance at a manufacturing stage together with the temperature sensor. 3. The wireless tag,
An A / D converter that captures at least temperature information measured by the temperature sensor, an ID memory that stores an identifier indicating a mounting location of the plant equipment, and temperature information that is captured by the A / D converter. A wireless transmitting and receiving circuit for wirelessly transmitting the identifier recorded in the ID memory;
The sensor-equipped plant equipment according to claim 1 or 2, further comprising: Plant components,
One or more wireless tags that are covered with a heat-resistant material and are connected to a temperature sensor mounted at an arbitrary position of the plant component device;
A plant monitoring device that establishes a link for sequential connection with the one or more wireless tags, wirelessly receives measurement information from the temperature sensor, and monitors a temperature distribution of the plant components.
A plant monitoring system comprising: 5. The plant monitoring system according to claim 4, wherein, depending on a diagnosis result of the plant monitoring device, a facility that performs a recovery operation on the plant component device is driven. 6.

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