KR20110135550A - Apparatus for monitoring combustion of sole flue in coke oven and method for the same - Google Patents

Abstract

PURPOSE: A system and a method for monitoring the combustion of a sole flue in a coke oven are provided to monitor the combustion of a sole flue in real time by using an optical fiber cable as a sensor. CONSTITUTION: A system for monitoring the combustion of a sole flue in a coke oven comprises an optical fiber sensor unit(310), a temperature measuring unit(350), and a temperature monitoring server(370). The optical fiber sensor unit is installed on the top of a sole flue mask frame and transfers scattered light to the temperature measuring unit. The temperature measuring unit measures the temperature of the transferred scattered light and transfers the measured value to the temperature monitoring server. The temperature monitoring server determines whether a sole flue is combusted or not based on the transferred temperature value. If the sole flue is combusted, the temperature monitoring server outputs an alarm signal.

Description

Coal Oven's Sol Flue Combustion Monitoring System and Its Method {APPARATUS FOR MONITORING COMBUSTION OF SOLE FLUE IN COKE OVEN AND METHOD FOR THE SAME}

The present invention relates to a coke oven, and more particularly, to a coke oven's sole flow combustion monitoring system and method capable of monitoring in real time the sole flow combustion of the coke oven.

In general, coke is manufactured by distilling coal, and a coke oven is used to dry the coal.

FIG. 1 shows the configuration of a general coke oven, and FIG. 2 shows the components of the coke oven shown in FIG. 1 in more detail.

1 and 2, the general coke oven 100 is manufactured by mixing coke oven gas to a blast furnace gas and producing a suitable heat amount of mixed gas, and then, in a distribution pipe 11. A gas inlet box 13 for guiding the mixed gas to the sole flue 15 is installed, and there is a sole flow 15 in which gas and air stay. The heat accumulating chamber 19 which preheats fuel gas and combustion air after accumulating heat when it discharges is installed.

In addition, a nozzle plate 17 for adjusting the amount of mixed gas supplied to each flow from the first flow to the flow 34 of the combustion chamber 21 is inserted into the sole flow 15, and a pusher side is formed. At each lower end of the side 29 and the coke side 31, an inlet 25 through which the nozzle plate 17 can be inserted or removed is provided, and an inlet 25 of the nozzle plate 17 is provided. A steel mask 43 made of casting is installed, and a gasket 45 is installed between the inlet frame (or the sole mask mask frame) 41 and the mask 43 to prevent the inflow of air. In the center of the mask 43, a circular inspection opening 47 for checking the combustion state and pressure of the sole flow 15 is formed, and the mask 43 has an inlet frame 41 and a fixing eye bolt (Eye). Bolt) 49 is fastened.

Referring to FIGS. 1 and 2, when the combustion process of the coke oven 100 is described, when the coke oven gas is mixed with the blast furnace gas to produce an appropriate amount of mixed gas, the mixed gas is alternately mixed in the odd combustion chamber and the even combustion chamber for 20 minutes. Is supplied and the mixed gas is combusted in the combustion chamber 21, and the coal charged in the carbonization chamber 23 adjacent to the rear part of each combustion chamber 21 is carbonized to produce coke. Waste gas generated at this time is discharged to the stack 33 via the waste stool 27.

In the combustion process as described above, the mixed gas supplied as fuel to the combustion chamber 21 of the coke oven 100 is supplied to the combustion chamber 21 to meet the combustion air in the combustion chamber 21 to be burned in the carbonization chamber 23. ) To maximize thermal efficiency. Before the mixed gas is supplied to the combustion chamber 21, air in the atmosphere in the sole flow 15, the heat storage chamber 19, or the waste stool 27 15) It can be introduced and burned prematurely. This phenomenon is called solvent flow.

As described above, when the mixed gas is combusted in the sole flow 15, coke is not dried because of heat transfer to the carbonization chamber 23, and coke strength is lowered. The heat consumed is increased. In addition, during the extrusion operation, the environment is contaminated by dust coke and soot generated due to undried coke, and coking coal is generated in the CDQ bucket to remove coking coal. Operation is delayed during removal, which leads to the problem of stopping coke production. In addition, the nozzle plate 17 is bent due to the heat burned in the sole flow 15, and a grating plate for supporting a checker brick is melted in the heat storage chamber 19. The checker brick is damaged, the mask 43 and the gasket 45 are burned out, and it is out of the operable temperature range of 860 ° C. to 1460 ° C. of the silica wite constituting the furnace, resulting in a transition to the silica wand. There is a possibility of causing a fatal defect in the coke oven (100).

In order to solve the problems as described above, in the past, the operator has relied on a method for monitoring the combustion of the brush flow through the neck side during instantaneous check.

For example, in the conventional art, when a worker measures a single flow temperature (flies 1 and 34) on a coke oven furnace once every quarter by using a pyrometer, the furnace temperature is lower than the average temperature. After going to the sole flow 15 and opening the inspection opening 47 in the center of the mask 43, the glass 51 was placed on the inspection opening, the combustion state of the sole flow was checked and abnormal points for each site were determined.

However, the conventional solvent combustion monitoring method as described above has a disadvantage in that it is not quantitative and not accurate because it mainly depends on the experience of the operator. In addition, the conventional brush flow combustion monitoring method cannot monitor the combustion of the sole flow in real time because the operator performs the monitoring work according to a predetermined schedule, and thus it is appropriate at the optimum time when the combustion occurs in the sole flow. There is a disadvantage that can not cope.

SUMMARY OF THE INVENTION An object of the present invention to overcome the above disadvantages is to provide a sol flue combustion monitoring system of a coke oven that can accurately monitor sol flue combustion of a coke oven in real time.

In addition, another object of the present invention is to provide a method for monitoring the sol flue combustion of the coke oven, which can accurately monitor in real time the sol flue combustion of the coke oven.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the object of the present invention described above, the coke oven's sol flew combustion monitoring system according to an aspect of the present invention is installed on an upper portion of a sol flew mask frame and is configured to detect and transmit scattered light generated during sol flew combustion. And a temperature measuring unit for measuring a temperature based on the scattered light signal transmitted from the optical fiber sensor unit and transmitting a temperature measurement value, and determining the sol flue combustion based on the temperature measurement value transmitted from the temperature measuring unit, And a temperature monitoring server outputting an alarm signal when it is determined that the flow combustion has occurred.

The temperature monitoring server may compare the temperature measurement value with a preset lower limit reference value and an upper limit reference value and output the alarm signal when the temperature measurement value is not included between the lower limit reference value and the upper limit reference value.

The temperature monitoring server may store a temperature measurement value when the temperature measurement value is not included between the lower limit reference value and the upper limit reference value, and display a temperature change by using the previously stored temperature measurement value and the temperature measurement value. have.

The optical fiber sensor unit may include an optical fiber cable including an optical fiber, a cable surrounding the optical fiber, a flexible hose surrounding the cable, and a connector installed at one end of the flexible hose, and a mount in which the cable containing the optical fiber is accommodated. Can be.

The mount can be installed to cope with shrinkage and expansion by heat of the inlet frame of the coke oven.

In the coke oven's sol burn combustion monitoring system, when two or more optical fiber sensor units are provided, optical fibers housed in each of the two or more optical fiber sensor units may be connected in series through a connection enclosure.

In addition, the sol flue combustion monitoring method of the coke oven according to an aspect of the present invention for achieving another object of the present invention, in the sol flue combustion monitoring method of the sol flue combustion monitoring system of the coke oven, using an optical fiber cable Measuring the temperature of the sole flow upper frame; comparing the measured temperature measurement with a preset lower and upper reference values; and if the temperature measurement is not included between the lower and upper threshold values. Outputting.

The method of monitoring the combustion of the coke oven in the coke oven stores the temperature measurement when the temperature measurement value is not included between the lower limit reference value and the upper limit reference value, and uses the temperature measurement value and the previously stored temperature measurement value. The method may further include displaying a temperature change.

When the temperature measurement value is not included between the lower limit reference value and the upper limit reference value, the step of outputting an alarm may display location information of a brush in which the temperature measurement value is measured.

According to the coke oven's sol-fire combustion monitoring system and method thereof, a fiber-optic cable is used as a sensor, so that a single fiber may be used even in an environment where the same equipment is continuously disposed at a long distance such as a sol-sol mask in a coke plant. It can be used to monitor the combustion of solvents in real time and output alarms according to the monitoring results.

Thus, it is possible to detect the sol burn combus- tion early, so that the best course of action can be taken to prevent burnout of the coke oven plant. In addition, as described above, through monitoring and measures of the combustion of the sole flow, it is possible to prevent the coke undrying phenomenon and to prevent the deterioration of the coke quality.

In addition, it is possible to reduce the heat consumption of the coke manufacturing cost, and to reduce the cost by managing the target temperature down, to prevent environmental pollution due to dust coke and smoke generated during the extrusion operation during the extrusion operation, the CD CDQ Bucket prevents the occurrence of coal briquettes by preventing the occurrence of coal briquettes, which can lead to increased production by preventing delays in the operation of coal briquettes.

In addition, it is possible to prevent the nozzle plate from bending due to the heat burned in the sole flow, and to prevent the grating plate, which supports the checker brick, from melting inside the heat storage chamber. The Checa Brick can be prevented from being damaged, nozzle plate inlet masks and gaskets can be prevented from being burned out, and the transfer of silicate (SiO2), which forms the roche, can be prevented to solve fatal defects in the coke oven. It is possible to solve the problem that caused the problem, which can greatly improve the work efficiency of workers.

1 shows a configuration of a general coke oven.
FIG. 2 shows the components of the coke oven shown in FIG. 1 in more detail.
3 is a block diagram showing the configuration of a sol flue combustion monitoring system of a coke oven according to an embodiment of the present invention.
4 and 5 are perspective views showing a more detailed structure of the optical fiber sensor unit shown in FIG.
FIG. 6 shows a mounting method shown in FIG. 5.
7 is a conceptual diagram illustrating an installation example of a sol flue combustion monitoring system of a coke oven according to an embodiment of the present invention.
8 is a flow chart illustrating a method for monitoring the combustion of the solute in the coke oven according to an embodiment of the present invention.
FIG. 9 is a graph illustrating a temperature change displayed in a process of performing a sol flue combustion monitoring method of the coke oven illustrated in FIG. 8.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same elements in the drawings, and redundant description of the same elements is omitted.

3 is a block diagram showing the configuration of a sol flue combustion monitoring system of a coke oven according to an embodiment of the present invention.

Referring to FIG. 3, the coke oven's sole flow combustion monitoring system 300 may include an optical fiber sensor 310, a temperature measuring unit 350, a communication unit 360, and a temperature monitoring server 370. The output unit 380 and the storage unit 390 may further include.

The optical fiber sensor unit 310 includes an optical fiber cable and a mount for accommodating the optical fiber cable. The optical fiber sensor 310 is installed on the upper part of the brush mask frame which is most sensitive to the temperature of the brush flow in the coke oven. Detects and provides it to the temperature measuring unit 350. Here, the sole flow mask frame refers to the inlet frame 41 of the nozzle plate shown in FIG.

Here, the optical fiber sensor unit 310 may be composed of one or more may be installed in each of the plurality of brush mask frame, the optical fiber cable provided in each of the optical fiber sensor unit 310 may be connected in series.

The temperature measuring unit 350 measures the temperature based on the back scattered light signal provided from the at least one optical fiber sensor unit 310 through the optical fiber cable, and measures the measured temperature measurement value through the communication unit 360 through the temperature monitoring server 370. To be sent).

Alternatively, the temperature measuring unit 350 measures the temperature and then compares the temperature measured value with a preset lower limit reference value and an upper limit reference value, when the temperature measurement value is not included between the lower limit reference value and the upper limit reference value. It may be configured to display the alarm signal and the temperature change graph through, and to store the temperature measurement value in the storage unit 390.

The communication unit 360 converts the temperature measurement value provided from the temperature measuring unit 350 according to a communication standard and transmits the converted temperature measurement server to the temperature monitoring server 370. Here, the communication unit 360 may be configured as, for example, an Ethernet adapter for short range communication, or may be configured as an IEEE 802.11 series wireless interface for short range communication, and the temperature monitoring server 370 may include a temperature measuring unit 350. If it is located close to, it may be configured as a serial interface such as Universal Serial Bus (USB) or RS-232C.

When the temperature monitoring server 370 transmits the temperature measurement value from the temperature measuring unit 350, the temperature measurement value is compared with a preset lower limit reference value and an upper limit reference value, and the temperature measurement value is included between the lower limit reference value and the upper limit reference value. If not, an alarm message is output and the temperature change or alarm history is displayed on the graph using the previously stored temperature measurement value and the present temperature measurement value. Here, the alarm message may be output in various ways through a display element, a speaker, an alarm, and the like.

In addition, the temperature monitoring server 370 stores the temperature measurement value when the temperature measurement value is not included between the lower limit reference value and the upper limit reference value as described above, and uses the past temperature measurement value and the present temperature measurement value. The temperature change is displayed through a graph or the like.

As described above, in the coke oven's sol flue combustion monitoring system according to an embodiment of the present invention as a sensor for measuring temperature, induction, explosion-proof, high dielectric strength, strong corrosion resistance, radiation resistance, heat resistance, cold resistance, etc. Since the optical fiber having the characteristic of is used, thousands of points of temperature distribution information can be acquired at intervals of several meters (for example, one meter) for the entire length direction of several thousand meters of optical fiber.

In addition, since the optical fiber is not affected by electromagnetic waves and the optical fiber itself can perform a sensor, a power supply, and a data acquisition function at the same time, in an environment where the same equipment is continuously disposed at a long distance such as a solvent mask of a coke plant, There is an advantage that can simultaneously monitor multiple equipment using the optical fiber.

4 and 5 are perspective views showing a more detailed structure of the optical fiber sensor unit shown in FIG.

4 and 5, the optical fiber sensor unit 310 is largely composed of an optical fiber cable 320 and a mount 330 in which the optical fiber cable 320 is accommodated.

The optical fiber cable 320 includes an optical fiber 321, a cable 322 surrounding the optical fiber 321, and a flexible hose 323 surrounding the cable 322, and at one end of the flexible hose 323. A connector 324 is installed to couple the flexible hose 323 to one end of the mount body 331.

The mount 330 is made of an aluminum material having excellent thermal conductivity, and protects the mount body 331 and the optical fiber built-in cable 322 housed therein from the external environment in which the cable 322 containing the optical fiber 321 is housed. The mount cover 332 is fastened through fastening means such as the mount main body 331 and screws to prevent the separation of the 322.

An elliptical groove 333 is formed in the mount main body 331, and the cable 322 in which the optical fiber 321 is embedded is wound one or more times to be integrated with the mount main body 331 in the groove 333. . When measuring the temperature by using the optical fiber, the minimum length of the optical fiber cable that can detect the temperature change due to the limitation of the laser pulse width incident on the optical fiber is required as long as the minimum spatial distance required. The cable 322 in which the optical fiber 321 is embedded is wound around the groove 333 of the mount body 331 and installed.

In addition, an elliptical hole 335 is formed at the central portions of the mount body 331 and the mount cover 332 so that a fastening member (for example, a bolt) for installing the mount 330 can pass therethrough. Two fastening grooves 336 are formed at one end of the 331 to be connected to the groove 333 and to fasten the connector 324 of the optical fiber cable 320.

FIG. 6 is a view illustrating a mounting method of the mount shown in FIG. 5, illustrating a process of installing a mount on which an optical fiber cable is installed, on an upper frame of a sole mask.

Referring to (a) and (b) of FIG. 6, the mount 330 provided with the optical fiber 321 built-in cable 322 may be adapted to the contraction and expansion caused by the heat of the inlet frame 610 to behave together. Welds a bracket 623 having a hole in which the bolt 622 can be inserted to both sides of the support 621 of the heat storage chamber outer wall 620, and bolts 622 for fixing the bracket And a mounting support 626 having a hole 625 for fixing the mount 330 to the bracket 623 is installed in the bracket 623, and the hole 335 of the mount 330 is mounted to the mounting fixing bolt 624. By fixing lightly to the inlet frame 610, the mount 330 is installed with the optical fiber built-in cable in accordance with the thermal expansion and contraction of the inlet frame 610 can be combined with the behavior.

7 is a conceptual diagram illustrating an installation example of a sol flue combustion monitoring system of a coke oven according to an embodiment of the present invention, wherein two mounts 330 are respectively installed on two sol pleated masks 630-1 and 630-2. For example, the connection of the optical fiber cables stored at -1 and 330-2 by using a connection enclosure is illustrated.

Referring to FIG. 7, a coupling housing 640 connects one side 320-1 of the optical fiber cable installed in the first mount 330-1 and one side 320-2 of the optical fiber cable installed in the second mount 330-2. ) And the other side 320-3 of the optical fiber cable installed in the second mount 330-2 to the temperature measuring unit 350 so that the two sole flow masks 630-1 and 630-2 are upper side When the temperature of the frame is measured in real time, when combustion occurs inside the sole flow, the optical fiber sensor unit installed on the top of the flame flow mask where the combustion occurs detects the backscattered light and transmits it to the temperature measuring unit 350, and the temperature measuring unit 350 After measuring the temperature based on the transmitted back-scattered light transmits the measured temperature to the temperature monitoring server 370 through the communication unit, or compares the preset lower limit and upper limit reference value and outputs an alarm signal based on the comparison result. Can be.

As illustrated in FIG. 7, in the present invention, in the environment in which the same equipment is continuously disposed at a long distance such as a brush mask of a coke plant, multiple facility monitoring may be simultaneously performed using one strand of optical fiber.

FIG. 8 is a flowchart illustrating a method for monitoring a sol flue combustion of a coke oven according to an embodiment of the present invention, in which an optical fiber sensor unit illustrated in FIG. 3 is respectively installed on at least one sol ple mask mask frame, and has a temperature abnormality (or sol) It is assumed that the lower limit reference value and the upper limit reference value for determining the presence or absence of flight combustion are performed in the set state. In addition, FIG. 9 is a graph showing a temperature change displayed in the process of performing the sol flue combustion monitoring method of the coke oven shown in FIG. 8, and FIG. 9 (a) shows a combustion action graph due to a sol flue mask gasket failure. 9 (b) shows a combustion action graph due to a defective gasket front side gasket.

8 and 9, first, the temperature measuring unit measures the temperature of the sole flow frame based on the optical signal provided from the optical fiber sensor unit (step 801), and transmits the measured temperature measurement value to the temperature monitoring server ( Step 803).

The temperature monitoring server compares the temperature measurement value transmitted from the temperature measuring unit with a preset lower limit reference value and an upper limit reference value (step 805) to determine whether it corresponds to the alarm temperature (step 807). Here, the alarm temperature means a value in which the temperature measurement value is not included between the lower limit reference value and the upper limit reference value, which means that the combustion of the solvent flow occurs.

As a result of the determination in step 807, if it is determined that the measured temperature corresponds to the alarm temperature, the temperature monitoring server outputs an alarm indicative of a temperature abnormality or brush flow combustion (step 809). Here, the temperature monitoring server may output an alarm through various methods such as an alarm message, an alarm sound, and an alarm lamp, and output an alarm of temperature abnormality including information on the location (that is, the corresponding position of the brush) of the alarm temperature. can do.

In addition, the temperature monitoring server stores the temperature measurement value and the alarm history, and simultaneously displays the temperature change through a graph or the like using the stored temperature measurement values and the current temperature measurement values (step 811).

Through the temperature change graph displayed as described above, the manager checks the recent work contents and the point where the temperature abnormality occurred, and then checks the corresponding brush flow mask to analyze the cause of the temperature abnormality, and perform the brush flow corrective action. can do. After that, the administrator checks the temperature change state as shown in FIG. 9 after performing the action, and if the temperature error is not solved, the administrator completes the above temperature problem by performing the above-mentioned brush flow action again. I can solve it.

Referring back to FIG. 8, if it is determined that the temperature measured in step 807 does not correspond to the alarm temperature, the temperature monitoring server stores the temperature measurement value (step 813), and the temperature measurement value and the stored past temperature measurement. The temperature change graph is displayed using the value (step 815).

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

310: optical fiber sensor 320: optical fiber cable
321: optical fiber 322: cable
323: flexible hose 324: connector
330: Mount 331 Mount Body
332: mount cover 333: groove
335: hole 350: temperature measuring unit
360: communication unit 370: temperature monitoring server

Claims (9)

An optical fiber sensor unit installed at an upper portion of the sole flow mask frame to detect and transmit scattered light generated during combustion of the sole flow;
A temperature measuring unit measuring a temperature based on the scattered light signal transmitted from the optical fiber sensor unit and transmitting a temperature measurement value; And
And a temperature monitoring server configured to determine the sol flew combustion based on the temperature measurement value transmitted from the temperature measuring unit, and output an alarm signal when it is determined that the sol flew combustion has occurred. The method of claim 1, wherein the temperature monitoring server
Monitoring of the combustion of the solutes of the coke oven, characterized in that the temperature measurement value is compared with a predetermined lower limit reference value and an upper limit reference value and the alarm signal is output when the temperature measurement value is not included between the lower limit reference value and the upper limit reference value. system. The method of claim 2, wherein the temperature monitoring server
When the temperature measurement value is not included between the lower limit reference value and the upper limit reference value, the temperature measurement value is stored, and a temperature change is displayed using the previously stored temperature measurement value and the temperature measurement value. Solfle combustion monitoring system. According to claim 1, wherein the optical fiber sensor unit
An optical fiber cable having an optical fiber, a cable surrounding the optical fiber, a flexible hose surrounding the cable, and a connector installed at one end of the flexible hose; And
And a mount into which the cable containing the optical fiber is housed. The method of claim 4 wherein the mount is
2. A solenoid combustion monitoring system for a coke oven, wherein the coke oven is installed to cope with heat shrinkage and expansion of the inlet frame of the coke oven. The system of claim 4, wherein the coke oven's sole flow combustion monitoring system,
And two or more optical fiber sensor units, the optical fibers stored in each of the two or more optical fiber sensor units are connected in series through a connecting enclosure. In the sol flue combustion monitoring method of the sol flue combustion monitoring system of a coke oven,
Measuring the temperature of the sole flow frame using an optical fiber cable;
Comparing the measured temperature measurement value with a preset lower limit reference value and an upper limit reference value; And
And outputting an alarm when the temperature measurement value is not between the lower limit reference value and the upper limit reference value. 8. The method of claim 7, wherein the coke oven's brush flow combustion monitoring method,
Storing the temperature measured value when the temperature measured value is not included between the lower limit reference value and the upper limit reference value, and displaying a temperature change using the temperature measured value and a previously stored temperature measured value. Brush flow combustion monitoring method of the coke oven, characterized in that. The method of claim 7, wherein outputting an alarm when the temperature measurement value is not included between the lower limit reference value and the upper limit reference value,
A method for monitoring the combustion of a sol flue in a coke oven, characterized by displaying the location information of the sol flue where the temperature measurement is measured.

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