JP3868398B2 - Remote monitoring system for melting furnace - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a system for comprehensively monitoring a melting furnace for melting waste such as incinerated ash, fly ash, and residues from a remote location via a communication network.
[0002]
[Prior art]
Wastes such as municipal waste, sewage sludge, incineration ash such as industrial waste, fly ash and residue are melted in a melting furnace, slag is reused or discarded. Examples of melting furnaces used for these melting processes include plasma melting furnaces, swirling melting furnaces, and reflection melting furnaces. However, when melting ash, it is necessary to operate above the melting point of ash. Therefore, in any melting furnace, the inside of the furnace is maintained at a high temperature of about 1300 ° C. or higher. Since the refractory disposed on the inner wall of the furnace is eroded by such a high-temperature atmosphere in the furnace, it is necessary to periodically replace the refractory.
[0003]
Conventionally, the refractory replacement timing is determined based on the refractory erosion amount calculated from the refractory wall thickness measured at the time of reactor shutdown inspection or the refractory erosion amount estimated from the operating time and slag temperature. I was planning. However, stopping the melting furnace each time to measure the thickness of the refractory causes deterioration of operating efficiency, and when estimating the erosion amount from the operating time and slag temperature, the past long-term operation data is used. A large amount of data must be collected, and at present, it is difficult to derive an accurate operation plan because the estimation formula is inaccurate due to a lack of data.
[0004]
It is also important to monitor the temperature in the furnace so that the temperature in the furnace becomes higher than necessary and damage and wear of the refractory are not accelerated. Conventionally, a method of measuring temperature using a thermocouple is generally used for monitoring the temperature inside the furnace, and the operation control of the furnace is performed based on the temperature measured by the monitoring facility provided outside the furnace. .
FIG. 13 and FIG. 14 show an example of a conventional melting furnace and an outline of the monitoring means provided in them. FIG. 13 shows a plasma melting furnace 100A, which is one of melting furnaces, in which a plasma arc is generated by a DC power source 105 between a main electrode 103 and a bottom electrode 104 respectively inserted at the top and bottom of the furnace body 101. The waste is melted into slag 107 by the plasma arc heat and the Joule heat of the current flowing between the electrodes.
[0005]
The plasma melting furnace 100A is provided with a temperature sensor 111 for detecting the temperature in the furnace, and the temperature measured by the temperature sensor 111 is sent to a monitoring facility 110 provided outside the furnace, and the monitoring facility A DC power source or the like is controlled based on the temperature measured at 110 to keep the furnace temperature constant. Further, in the plasma melting furnace 100A, an insulating sleeve 102 is disposed so as to surround the main electrode, thereby preventing stray currents from being conducted to the furnace wall. However, with the continuous operation of the melting furnace, the insulation sleeve 102 is worn out, damaged, or a stray current is generated due to deposits. Therefore, an ammeter 106 is provided to monitor this. The current value measured by the ammeter 106 is sent to the monitoring equipment 110, and when the occurrence of stray current is confirmed, the operation of the furnace is stopped for maintenance.
[0006]
FIG. 14 shows a conventional swirl type melting furnace 100B. The swirl type melting furnace 100B melts waste such as ash mixed in air and transported into the furnace main body 108 by combustion heat of a burner or the like. In the melting furnace 100B as well, the temperature sensor 111 for detecting the temperature in the furnace is provided similarly to the plasma melting furnace 100A, and the temperature measured by the temperature sensor 111 is sent to the monitoring facility 110 outside the furnace, Based on this, the furnace temperature is controlled by controlling the fuel supply amount of the burner.
As described above, based on various detection signals collected in the monitoring facility from various monitoring means such as temperature sensors and ammeters conventionally provided in the melting furnace, an operation plan for repairing, cleaning and replacing parts of the melting furnace is prepared. I was planning.
[0007]
On the other hand, with recent development of communication equipment, a system for monitoring a plant from a remote location has been developed. For example, as disclosed in Japanese Patent Application Laid-Open No. 11-3113 (Patent Document 1), such a system monitors the state of equipment operated in a plant and transmits the obtained equipment information to a remote location via a communication line. The management facility centrally manages the deterioration state of the equipment based on the equipment information.
A system that unifies and monitors information from sensors provided in operating plant equipment is disclosed in Japanese Patent Laid-Open No. 2002-117468 (Patent Document 2).
Further, JP 2002-221310 A (Patent Document 3) discloses an operation monitoring monitor system for a melting furnace, and a system for monitoring data on desired attributes collected from the melting furnace during operation by a remote unit. Has been proposed.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-3113
[Patent Document 2]
JP 2002-117468 A
[Patent Document 3]
JP 2002-221310 A
[0009]
[Problems to be solved by the invention]
As described above, in the conventional melting furnace, an operation plan has been made based on various operation data collected by the monitoring facility attached to the melting furnace. However, it is a fact that data such as the erosion amount of the refractory in the melting furnace and the degree of sleeve insulation deterioration have a very long change time and the operation amount is inaccurate because the amount of accumulated data is small.
It may be possible to tune the operation plan by skilled operators in order to increase the accuracy of the operation plan, but it is impossible to place skilled operators in all melting furnaces and the reliability of the operation plan It is difficult to guarantee the sex.
[0010]
Therefore, as in the systems described in Patent Documents 1 to 3, it is very effective to monitor the operation data of the melting furnace with monitoring equipment installed at a remote place and reflect the monitoring result in the operation plan of the melting furnace. Means.
However, in the melting furnace for melting waste as in the present invention, the operating state changes remarkably depending on the amount, type, combustion state, etc. of the waste to be processed. It is difficult to create a melting furnace operation plan. Patent Documents 1 and 2 mainly target plants such as power plants, and do not disclose a specific configuration suitable for the melting furnace targeted by the present invention. Therefore, it is difficult to formulate a precise melting furnace operation plan based on the refractory erosion amount of the melting furnace and the degree of insulation deterioration of the sleeve from the operation data obtained by the monitoring system of the above-mentioned patent document. Further, Patent Document 3 only monitors operation data collected from the melting furnace, and does not make an operation plan based on the operation data.
[0011]
Therefore, in view of the problems of the prior art, the present invention accurately grasps the operation state of the melting furnace from the operation data of the melting furnace collected at a remote place, and further optimal for the operation of the melting furnace from the operation data. An object is to provide a remote monitoring system for a melting furnace that makes it possible to make an operation plan.
[0012]
[Means for Solving the Problems]
  Therefore, in order to solve this problem, the present invention provides:
  A system that performs remote monitoring of a melting furnace based on various operation data of the melting furnace accumulated from the monitoring terminal at a management server connected to each monitoring terminal provided in a plurality of melting furnaces via a communication network. There,
  The management server calculates the operation plan based on the operation data obtained by calculating means for calculating the operation plan of each melting furnace based on the operation data, means for storing the operation plan, and operation data acquired every predetermined time. Means for recalculating and updating the stored operation planAndPrepared,
  Sending the latest operation plan calculated based on operation data collected from multiple melting furnaces to the monitoring terminal.Abstract ( Reference example )And
[0013]
  TakeAbstract ( Reference example )Collects operation data such as furnace temperature, refractory temperature, slag temperature, current value conducted to the furnace wall, and furnace operation time over time by various measuring means provided in the melting furnace, and based on the above, This is a system that accurately obtains an operation plan such as a furnace member replacement time, maintenance time, and cleaning time in the management server. As in this invention, the operation server necessary for every predetermined time is obtained by the management server and the operation plan is recalculated, so that the operation plan in the latest state can be always established, and the optimum operation is performed. State. In addition, since operation data is collected from a plurality of melting furnaces in a lump, a large amount of data can be collected, and a highly accurate operation plan can be calculated.
[0014]
  And claim 1As an invention, in a management server connected via a communication network to monitoring terminals provided in a plurality of melting furnaces, remote monitoring of the melting furnaces is performed based on various operation data of the melting furnaces accumulated from the monitoring terminals. A system,
  Means for storing waste amount data to be processed in the plurality of melting furnaces, and means for calculating an operation plan of the melting furnace based on the operation data;AndPrepared,
  The calculation means selects a requirement indicating the shortest life among a plurality of furnace life determination requirements obtained from the operation data, and based on the operation plan calculated from the shortest life and the waste amount data, A melting furnace to be stopped is determined from among the melting furnaces.
[0015]
According to this invention, in addition to the operation data, waste amount data to be processed in a plurality of predetermined melting furnaces is acquired, and the operation plan of each melting furnace and the waste amount obtained from the operation data By creating an operation plan for the entire melting furnace based on the data, that is, by deciding the melting furnace to be stopped from among the plurality of melting furnaces, it is possible to reliably handle the amount of waste generated and The waste disposal efficiency is improved by adjusting the furnace stop timings for maintenance, cleaning, parts replacement, etc., among multiple melting furnaces.
The furnace life is a period from the necessity of repairing the furnace, cleaning, replacement of parts, etc., to the time when the furnace is stopped from the current time or the start of the furnace operation. It is a condition that determines the life of the furnace, such as the degree of insulation deterioration and the amount of refractory erosion. The requirement indicating the shortest life is a condition that requires the furnace to be stopped first among the furnace life determination requirements.
[0016]
  further,BookIn the invention, the melting furnace is a plasma melting furnace having an electrode disposed opposite to the furnace and an insulating sleeve disposed so as to surround the electrode,
  The management server obtains operation data including a current value and a current generation frequency obtained by a current detection unit provided on a furnace wall of the melting furnace, and the calculation unit calculates the current value and the current generation frequency from the current value and the current generation frequency. The stop timing of the plasma melting furnace is determined based on the obtained sleeve insulation deterioration degree.
[0017]
Further, the management server acquires operation data comprising the furnace wall thickness of the melting furnace and stops the melting furnace based on the refractory erosion amount obtained from the difference from the initial furnace wall thickness by the computing means. It is characterized by judging the time.
Furthermore, the management server obtains operation data including the operating time and slag temperature of the melting furnace, and the calculation means calculates the melting furnace based on the refractory erosion amount obtained from the operating time and slag temperature. The stop time is judged.
These inventions are the inventions for making an operation plan mainly based on the melting time of the melting furnace, and the state in which the operation of the melting furnace should be stopped, that is, the insulation deterioration of the insulating sleeve or the erosion of the refractory cannot be performed in a steady state. Develop an operation plan that stops the operation of the melting furnace before it reaches the point. According to this, it is possible to accurately determine the stop time based on a plurality of operation data.
[0018]
In addition, a ubiquitous sensor having a temperature detection means, a means for storing the detected temperature, and a wireless transmission / reception means for transmitting the stored temperature to the monitoring terminal is disposed on the melting furnace wall,
The slag temperature is calculated based on the furnace wall temperature acquired from the ubiquitous sensor.
It is preferable that the ubiquitous sensor is configured to be operated by a thermoelectromotive force using heat transfer from the melting furnace.
[0019]
The ubiquitous sensor is a sensor using a ubiquitous computing system that has been spreading in recent years, and is characterized by ubiquity. Ubiquitous refers to an environment in which computers operate in cooperation with each other without human intervention. In the present invention, the monitoring terminal automatically receives detection signals automatically transmitted from ubiquitous sensors. Is possible.
At this time, the ubiquitous sensor is preferably configured to include means capable of communicating with the outside wirelessly, means for detecting temperature, storage means, a power source, and the like.
In the present invention, by utilizing the features of low cost, small size, and wireless communication that the ubiquitous sensor has, any number of measurement points can be set in a wider range than before, and at the same time, the overall cost can be reduced. In addition, it is possible to provide a highly accurate monitoring system using a wide range and high density measurement data.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
FIG. 1 is an overall configuration diagram of a remote monitoring system according to an embodiment of the present invention, and FIG. 2 is a schematic sectional view of a plasma melting furnace provided with a remote monitoring system according to an embodiment of the present invention. In this embodiment, a plasma melting furnace is described as an example of a melting furnace to be monitored. However, the present invention is not limited to this, and waste melting processing such as a swirling melting furnace and a reflection melting furnace is possible. Any melting furnace may be used.
[0021]
1 includes each plant 300A, 300B, 300C,... Having a plasma melting furnace 10 and a monitoring terminal 30, and a management center 400 having a management server 40. The management server 40 is connected by a communication network 50 such as the Internet or a dedicated line. Further, when data is transmitted / received between the monitoring terminal 30 and the management server 40, communication is performed via firewalls 31 and 41 and routers 32 and 42 for the purpose of communication control and information protection, respectively.
[0022]
As shown in FIG. 1, the internal configuration of the monitoring terminal 30 includes a communication unit 30 a that performs communication between networks such as a LAN in a plant, and communication with the management server 40 via the communication network 50. A storage unit 30b that stores various operation data, an operation data collection unit 30c that acquires the operation data from the plasma melting furnace 10, a display unit 30d that can display an operation plan such as an LCD or a CRT display, and the plasma melting furnace 10 And a ubiquitous sensor transmitting / receiving unit 30e that wirelessly transmits and receives data. The operation data acquired from the plasma melting furnace 10 is, for example, time series data such as a current value for conducting the melting furnace wall, a refractory temperature, and a melting slag temperature.
[0023]
On the other hand, the internal configuration of the management server 40 includes the communication unit 40a that communicates with the monitoring terminal 30 via the network 50, the operation data accumulated from the monitoring terminal 30 of each plant, the amount of waste to be processed, and the like. A database 40b to be stored and a calculation unit 40c for calculating a melting furnace operation plan from the operation data are provided.
The calculation unit 40c has a function of calculating an operation plan such as replacement time, maintenance time, and cleaning time of the furnace members of each plasma melting furnace 10 based on the operation data.
[0024]
FIG. 2 shows a schematic cross-sectional view of the plasma melting furnace 10 provided in the plants 300A, 300B, 300C,. The plasma melting furnace 10 has a main electrode 13 inserted in the upper part of a furnace body 11 made of a refractory 11B coated with an iron skin 11A, and a furnace bottom electrode 14 is inserted in the furnace bottom so as to face this. Yes. An insulating sleeve 12 is disposed around the main electrode 13 to prevent stray currents that pass through the furnace wall without passing through a normal current path. In the plasma melting furnace 10, a direct current is passed between these electrodes by a direct current power source 15 to generate a plasma arc in the furnace. Waste introduced from the waste inlet 16 provided on the furnace wall is melted into slag 18 by the plasma arc heat and the Joule heat of the current flowing between the electrodes, and is discharged from the outlet 17.
[0025]
The plasma melting furnace 10 is provided with various detection means. For example, an infrared camera 20 capable of observing the inside of the furnace through a viewing window 19 provided on the furnace wall, a thermocouple 21 with a protective tube inserted from a fitting insertion hole of the furnace lid, and an insulator (not shown) of the furnace body These are an ammeter 22 for measuring a current value conducted between the main electrode 13 side and the furnace bottom electrode 14 side, and a ubiquitous temperature sensor 23 shown in FIGS. 8, 9, and 11 to be described later. The operation data collected by these detection means is collected by the monitoring terminal 30 via a wired / wireless line and further transmitted to the management server 40 via the communication network 50.
[0026]
Next, the monitoring process using the melting furnace remote monitoring system will be described with reference to the flowchart shown in FIG.
First, operation data is collected in the monitoring terminal 30 from various detection means of the plasma melting furnace 10 on the plant 300 side (S1). This is performed according to a command from the operation data collection unit 30c, and desired operation data is collected every predetermined time. The operation data is temporarily stored in the storage unit 30b and transmitted to the monitoring server 40 by the communication unit 30a (S2).
[0027]
The management server 40 on the management center 400 side receives the operation data from the monitoring terminal 30 through the communication unit 40a (S3) and stores it in the database 40b (S4). Then, based on the stored operation data, the remaining life of the refractory 11B and the remaining life of the insulating sleeve 12 are predicted by the calculation unit 30c (S5). An operation plan such as time and cleaning time is calculated (S6).
The operation plan obtained by the calculation unit 30c is transmitted to the monitoring terminal 30, the operation plan received by the monitoring terminal 30 is displayed on the display unit 30d, and operation and maintenance based on the operation plan are executed (S7). .
[0028]
Then, the operation data during operation, the refractory thickness measurement during maintenance, and the data based on the sleeve deterioration degree confirmation are collected (S8), and the collected data is transmitted again to the monitoring server 40 (S9). The monitoring server 40 stores the received collected data in the database 40b (S10), recalculates the operation plan from the collected data in the calculation unit 40c (S11), and updates the operation plan in the database 40b. It transmits to each plant (S12). Thus, since the operation plan is calculated based on the operation data acquired every predetermined time and the operation plan is updated each time, the optimum operation of the melting furnace can be performed based on the latest operation plan.
[0029]
Next, an operation plan drafting process flow in the management server 40 will be described with reference to FIG. The management server 40 stores the operation data accumulated from the monitoring terminal 30 in the database 40b (S20), and predicts the furnace life determination requirement from the operation data (S21). The furnace life is a period from the necessity of repairing the furnace, cleaning, and replacement of parts, for example, to the time when the furnace is stopped from the present time or the start of the furnace operation, and the furnace life determination requirement is, for example, the insulating sleeve 12. These are conditions for determining the furnace life, such as the degree of insulation deterioration of the steel and the amount of erosion of the refractory 11B. Then, an operation plan is calculated from the minimum life requirement selected from the furnace life determination requirement (S22). At this time, the shortest life requirement is a condition that requires the furnace to be shut down first among the furnace life determination requirements. For example, the furnace life determination requirements are: (1) Outlet brick erosion amount (furnace life: 1 month), (2) Insulation sleeve insulation deterioration degree (furnace life: 6 months), (3) Side wall brick erosion amount (furnace (4) Lifetime: 3 months), (4) Secondary flame refractories (furnace life: 6 months), and (1) Outgoing brick erosion amount is the shortest life requirement.
[0030]
The database 40b stores the amount of waste to be processed at a plurality of predetermined plants (S23). And a shutdown furnace is determined from the operation plan calculated | required by the said calculation, and the said waste amount (S24). In other words, a comprehensive operation plan for a plurality of plants is created so that the amount of waste to be processed is efficiently distributed to each plant, and a shutdown furnace is not created as much as possible. At this time, the shutdown period of the shutdown furnace can be determined at the same time. As a result, the amount of waste generated can be treated reliably, and the waste disposal efficiency is improved by adjusting the furnace stop timing for melting furnace maintenance, parts replacement, etc., among multiple melting furnaces.
[0031]
Here, an example of a calculation method for making an operation plan from the operation data in the calculation unit 40b will be described.
First, when calculating an operation plan based on the amount of erosion of the refractory 11, the amount of erosion is calculated by the following equation using the acquired slag temperature t and operation time h.
Erosion amount = A × exp (B / (t + 273.15) + C) × h (1)
Here, t: slag temperature (° C.), h: operation time (seconds), A, B, C: calculation parameters. The calculation parameter is derived from operation data accumulated from a plurality of plants, and re-tuning is performed every predetermined time.
[0032]
Further, when the operation plan is calculated based on the degree of insulation deterioration of the insulating sleeve 12, the degree of insulation deterioration is calculated by the following fuzzy inference based on the current value acquired by the ammeter 22.
First, a fuzzy set is obtained from operation data accumulated from a plurality of plants. Further, as shown in FIG. 6, a membership function (a) indicating the degree to which the number of stray current occurrences belongs to the fuzzy set and a stray current peak. The value membership function (b) is obtained. Then, the degree of fitness in each set is obtained from the current value obtained from the monitoring terminal 30 and the number of current occurrences by the membership function, and then the insulation deterioration degree (%) of the sleeve is obtained by the fuzzy rule shown in FIG. Calculate. In this embodiment, as an example, the stray current peak value (A) is set to a reference current value or less: B (BIG), a reference current value: Z (ZERO), a reference current value or less: S (SMALL), and the number of stray current occurrences ( The number of times stray current is generated at 5 A or more and 2 seconds or more) is set to the reference number or more: B (BIG) reference number: Z (ZERO), below the reference number: S (SMALL).
[0033]
Furthermore, the relationship between the sleeve insulation deterioration rate (%) thus determined and the operation time is as shown in the graph of FIG. 7, and the remaining sleeve life can be calculated by the following equation.
Sleeve remaining life = (threshold-current deterioration level) / deterioration speed (2)
At this time, the deterioration rate is calculated by the following equation.
Deterioration speed = (current deterioration degree−previous deterioration degree) / (current measurement time t−previous measurement time t ′) (3)
And
[0034]
Thus, by formulating an operation plan based on operation data consisting of the current value conducted to the furnace wall or the temperature in the furnace, before the insulation deterioration of the insulation sleeve or the erosion of the refractory becomes a level where steady operation is impossible. The operation of the melting furnace can be stopped. Furthermore, the stop time can be accurately determined based on a plurality of operation data.
In addition, it is good also as a structure which detects the amount of erosion with the thermocouple (not shown) inserted in the refractory 11B in a furnace, and judges a furnace stop time based on this amount of erosion. This utilizes the property that the thermocouple is eroded to the boundary surface between the molten slag 18 and the refractory 11B as the refractory 11B is eroded, current is passed through the thermocouple, and the resistance value is measured. Thus, the thermocouple length, that is, the refractory thickness is calculated, and the operation plan is calculated based on the refractory erosion amount obtained from the difference between the initial thickness and the thickness after a predetermined time.
[0035]
8 to 12 show an embodiment in which a ubiquitous sensor is used for the furnace wall of the plasma melting furnace 10 as the detection means.
FIG. 8 is an enlarged cross-sectional view of a portion A of FIG. 1 showing the refractory 11B in which the ubiquitous sensor is embedded. The ubiquitous sensor 23 is provided at the boundary between the refractory 11B and the water cooling jacket 11C for cooling and protecting the furnace wall. Many are arranged. As shown in FIG. 10, the ubiquitous sensor 23 includes a thermocouple 23c that detects the temperature of the refractory 11B, an IC-TAG 23b that includes a signal processing device that processes the detected signal, a memory, and a wireless transmission / reception device. A thermoelectric element 23a is used as a power source by generating a voltage by thermoelectromotive force using heat transfer from the melting furnace 10 as necessary. For the substrate of the IC-TAG 23b, a polymer material or a flexible ceramic plate can be used.
[0036]
The temperature data measured by the ubiquitous sensor 23 is collected as shown in the connection configuration between the monitoring terminal and the ubiquitous sensor in FIG. That is, as shown in FIG. 12A, a wireless reader provided in the monitoring terminal 30 is arranged in the vicinity of the melting furnace, and the wireless reader 30A receives temperature data from each sensor 23. . At this time, the temperature data may be collected by regular measurement of an operator who has the wireless reader 30A.
As another method, as shown in FIG. 12B, wireless communication is performed between the sensors 23 located in the vicinity, and the temperature data measured by the sensors 23 is sequentially transmitted and received with the neighboring sensors wirelessly. It is also preferable to transmit them, transmit them to the reader 30A near the furnace by the antenna 23d, collect data by the reader 30A, and monitor by DCS or the like.
[0037]
When using such a ubiquitous sensor 23, the sensor 23 may be embedded in advance in the refractory brick 11B as shown in FIG. 9, or along the refractory cooling water pipe 11D as shown in FIG. You may arrange | position by making it curve.
In this way, by using the ubiquitous sensor 23 having the temperature detecting means, it is possible to install arbitrarily many measurement points in a wider range than before, and at the same time, the overall cost can be reduced. It is also possible to provide a highly accurate monitoring system using a wide range and high density measurement data.
[0038]
【The invention's effect】
  As described above, the present inventionSummary of ( Reference example )According to the above, since operation data from a plurality of melting furnaces are collected and an operation plan for each melting furnace is drawn up based on this, it becomes possible to calculate an operation plan with higher accuracy than a large amount of operation data. . Furthermore, since the operation plan is calculated based on the operation data acquired every predetermined time and the operation plan is updated every time, the optimum operation of the melting furnace can be performed based on the latest operation plan.
  And according to the invention as claimed in claim 1,Since the operation plan of the entire melting furnace is drawn up from the operation data of multiple melting furnaces and the amount of waste data to be processed in these melting furnaces, it is possible to reliably process the amount of waste generated and to melt The waste disposal efficiency is improved by adjusting the furnace stop timing such as furnace maintenance and parts replacement among a plurality of melting furnaces.
[0039]
In addition, by preparing an operation plan based on the operation data consisting of the current value connected to the furnace wall or the temperature in the furnace, the melting furnace before the deterioration of insulation of the insulation sleeve or the erosion of the refractory becomes impossible to the steady operation. Can be stopped. Furthermore, the stop time can be accurately determined based on a plurality of operation data.
Furthermore, by detecting the furnace wall temperature using a ubiquitous sensor, the system can be reduced in cost, and a large number of measurement points can be installed, thereby enabling a highly accurate monitoring system.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a remote monitoring system according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a plasma melting furnace equipped with a remote monitoring system according to an embodiment of the present invention.
FIG. 3 is a flowchart of monitoring processing in the remote monitoring system of the present embodiment.
FIG. 4 is a flowchart of operation plan planning processing in the management server of the present embodiment.
FIG. 5 is a table showing fuzzy rules for calculating an insulation deterioration degree of an insulating sleeve.
FIG. 6 is a diagram illustrating a membership function for calculating an insulation deterioration degree of an insulating sleeve.
FIG. 7 is a graph showing the relationship between the degree of insulation deterioration of an insulating sleeve and time.
FIG. 8 is an enlarged cross-sectional view of a part A in FIG. 1 showing a refractory in which a ubiquitous sensor is embedded.
FIG. 9 is an enlarged view of part A of FIG. 1 showing a refractory brick in which a ubiquitous sensor is embedded.
FIG. 10 is a configuration diagram of a ubiquitous sensor.
11 is an enlarged cross-sectional view of a part A of FIG. 1 in which a ubiquitous sensor is embedded in a refractory provided with a water pipe.
FIG. 12 is a diagram illustrating a connection configuration between a monitoring terminal and a ubiquitous sensor.
FIG. 13 is a schematic cross-sectional view of a conventional plasma furnace.
FIG. 14 is a schematic sectional view of a conventional swirling melting furnace.
[Explanation of symbols]
10 Plasma melting furnace
11B Refractory
12 Insulation sleeve
17 Outlet
20 Infrared camera
21 Thermocouple
22 Ammeter
23 Ubiquitous sensor
23a Heat transfer element
23b IC-TAG
23c thermocouple
23d antenna
30 Monitoring terminal
40 Management server
300A, 300B, 300C plant
400 management center

Claims (6)

This is a system for remotely monitoring a melting furnace based on various operation data of the melting furnace accumulated from the monitoring terminal by a management server connected to a monitoring terminal provided in a plurality of melting furnaces via a communication network. And
Said management server, and means for storing the waste data to be processed by the plurality of the melting furnace, and means for calculating the operating plan based on soluble Toruro the operating data,
The calculation means selects a requirement indicating the shortest life among a plurality of furnace life determination requirements obtained from the operation data, and based on the operation plan calculated from the shortest life and the waste amount data, A remote monitoring system for a melting furnace, wherein a melting furnace to be stopped is determined from among the melting furnaces . The melting furnace according to claim 1 is a plasma melting furnace having an electrode disposed opposite to the furnace and an insulating sleeve disposed so as to surround the electrode,
The management server obtains operation data including a current value and a current generation frequency obtained by a current detection unit provided on a furnace wall of the melting furnace, and the calculation unit calculates the current value and the current generation frequency from the current value and the current generation frequency. A remote monitoring system for a melting furnace, wherein the stop timing of the plasma melting furnace is determined based on the obtained sleeve insulation deterioration degree . Before SL management server, the acquired operation data consisting of furnace wall thickness of the melting furnace, the calculating means initial oven wall wall thickness resulting termination timing of refractory based on erosion rate melting furnace than the difference in The remote monitoring system for a melting furnace according to claim 1, wherein: The management server acquires operation data including the operation time and slag temperature of the melting furnace, and the calculation means determines the stop time of the melting furnace based on the refractory erosion amount obtained from the operation time and slag temperature. claim 1 Symbol mounting remote monitoring system of the melting furnace, wherein the determining. A temperature detection means, a means for storing the detected temperature, and a wireless transmission / reception means for transmitting the stored temperature to the monitoring terminal are disposed on the furnace wall of the melting furnace,
The remote monitoring system for a melting furnace according to claim 4, wherein the slag temperature is calculated based on a furnace wall temperature acquired from the ubiquitous sensor . 6. The melting furnace remote monitoring system according to claim 5 , wherein the ubiquitous sensor is operated by a thermoelectromotive force using heat transfer from the melting furnace.

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