KR20180126969A - Apparatus for monitoring temperature of steel plate in blast furnace and method thereof - Google Patents

Abstract

The present invention relates to an apparatus to monitor the temperature of a steel cover in a blast furnace, to enable a manager to quickly take countermeasures, and a method thereof. According to the present invention, the apparatus to monitor the temperature of a steel cover in a blast furnace comprises: a steel cover temperature detection unit using one or more temperature sensors installed around the steel cover of a blast furnace to detect the temperature of the steel cover at a corresponding position; a stave temperature detection unit using one or more temperature sensors installed around an inner stave of the blast furnace to detect the inner terminal at a corresponding position; a steel cover temperature calculation unit using the inner temperature of the corresponding position detected by the stave temperature detection unit to calculate the temperature of the steel cover on the outside corresponding to an inner position; a steel cover temperature interpolation unit using the steel cover temperature of the corresponding position detected by the steel cover temperature detection unit and the steel cover temperature of the corresponding position calculated by the steel cover temperature calculation unit to interpolate the steel cover temperature of a position, where the temperature sensor is not installed, between the temperature sensors; and a three-dimensional (3D) steel cover temperature visualization unit to display one or more positions of the steel cover detected, calculated, or interpolated by the steel cover temperature detection, calculation, and interpolation units.

Description

[0001] APPARATUS FOR MONITORING TEMPERATURE OF STEEL PLATE IN BLAST FURNACE AND METHOD THEREOF [0002]

More particularly, the present invention relates to an apparatus and method for monitoring the iron-clad temperature of a blast furnace, and more particularly, to a method for monitoring the iron-clad temperature of a furnace using stake temperature in a furnace, The present invention relates to an apparatus and method for monitoring the temperature of a clay furnace, which enables an administrator to quickly respond by outputting an alarm to a clay point having a high temperature rising rate.

Generally, the blast furnace process furnishes raw iron ores and fuel coke through blast furnace blast furnaces, provides hot air to the inside of the blast furnace through the tuyeres at the bottom of the blast furnace, and uses the combustion heat and reducing gas generated by the combustion of the coke, (Molten iron and slag) by reducing and melting the molten iron.

The blast furnace body used in such a blast furnace process is made of a high-strength corrosion resistant inner wall stave, an outer steel pipe surrounding the inner wall, and a refractory material between the inner wall (stave) and the steel pipe. That is, the heat inside the blast furnace is transferred to the outer scoop through the inner wall (stave) and the refractory.

On the other hand, in the past, the management of the blast furnace body was managed by using a temperature sensor installed on the inner wall of the blast furnace, but the portion where thermal deformation and cracks were generated due to the temperature increase of the furnace body was not the inner wall of the blast furnace, It is necessary to monitor and control the outside temperature of the blast furnace.

The background art of the present invention is disclosed in Korean Patent Registration No. 10-1032531 (April 25, 2011, registered, temperature distribution visualization system and method inside the blast furnace).

According to an aspect of the present invention, there is provided a method for manufacturing a steel pipe, comprising: calculating a steel pipe temperature outside the blast furnace by using a stave temperature in a blast furnace, And outputting an alarm so that the manager can quickly respond to the alarm.

According to an aspect of the present invention, there is provided an iron-clad temperature monitoring apparatus for a blast furnace, comprising: a iron-clad temperature detector for detecting a iron-clad temperature at a point using at least one temperature sensor installed around the iron- A stave temperature detector for detecting an internal temperature of a corresponding point using at least one temperature sensor installed around an internal stave of the blast furnace; An iron-annealing temperature calculation unit for calculating an iron-annealing temperature corresponding to an internal point of the point by using the internal temperature of the corresponding point detected by the stave temperature detecting unit; An iron core temperature interpolating unit for interpolating the iron core temperature at a point between the iron core temperature at the corresponding point detected by the iron core temperature detection unit and the iron core temperature at the corresponding point calculated at the iron core temperature calculation unit; And at least one or more peaks of the peaks detected, calculated, or interpolated through the peeling temperature detecting section, the peeling temperature calculating section, and the peeling temperature interpolating section, And a three-dimensional annealing temperature visualizing unit for displaying the annealed annealing temperature by color temperature.

In the present invention, the three-dimensional iron-annealing temperature visualizing unit may automatically rotate the outer shape of the three-dimensional furnace indicated by the specified temperature color corresponding to the temperature at each of the at least one or more iron pebbles on the screen, And automatically rotates or rotates in real time in response to input information from an administrator or a user.

In the present invention, the three-dimensional iron-annealing temperature visualization unit displays the outline of the three-dimensional furnace at least at four predetermined angles at the same time by dividing the area of the screen, and displays the iron- And a graph of the result of counting the cumulative time of high temperature exposure of the iron oxide film is additionally displayed.

The present invention further includes a control unit that integrally performs the functions of the iron chip temperature calculating unit, the iron chip temperature interpolating unit, and the three-dimensional iron chip temperature visualizing unit, And outputs a warning.

In the present invention, it is preferable that each of the iron-clad points has a first point at which a temperature sensor is installed on the iron core, a second iron point corresponding to a point where the temperature sensor is installed in the furnace, And the third point of the iron wire calculated by interpolation between points.

According to another aspect of the present invention, there is provided a method for monitoring a copper foil temperature in a blast furnace, the method comprising: visualizing a copper foil temperature of a blast furnace in a three-dimensional shape on the basis of temperatures of respective points of the blast furnace steel; The control unit calculating a temperature increase rate of each point of the blast furnace steel; Detecting a point where the temperature rising rate is equal to or higher than a preset reference; And the controller displays a point where the temperature rising rate is equal to or higher than a preset reference on a screen in which the ironing temperature of the blast furnace is displayed in a three-dimensional shape, and at least one of visual warning, audible warning, and tactile warning Wherein each of the points of the blast furnace is provided with a first point at which a temperature sensor is installed in the iron furnace and a second point at which a temperature sensor is installed in the furnace, And a third point of the iron wire calculated by interpolation between the first point and the second point.

In the present invention, the temperature rising rate means a slope of a rate at which the temperature rises with time, and the time required to reach a specified temperature increases with an increase in the slope.

In the present invention, in the step of visually displaying the iron-clad temperature of the blast furnace in a three-dimensional shape and outputting it as a screen, the control unit automatically rotates the three- And automatically rotates according to the speed or rotates in real time in response to the input information from the manager or the user.

According to an aspect of the present invention, there is provided a method for manufacturing a steel pipe, comprising: calculating a steel pipe temperature outside the blast furnace by using a stave temperature in a blast furnace, An alarm is output and the manager can respond quickly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a schematic configuration of an iron-clad temperature monitoring apparatus in a blast furnace according to an embodiment of the present invention; FIG.
2 is a flow chart for explaining a method of monitoring the iron-clad temperature according to an embodiment of the present invention.
FIG. 3 is a view showing a photograph of a crack occurring in the scorching of a blast furnace according to an embodiment of the present invention; FIG.
FIG. 4 is an exemplary diagram for conceptually explaining the operation of the iron chip temperature calculating unit in FIG. 1; FIG.
FIG. 5 is a graph showing a result of verifying the accuracy of the iron-clad temperature calculated by the iron-clad temperature calculator with the measured temperature in FIG. 1; FIG.
FIG. 6 is an exemplary view showing a configuration of a real-time monitoring screen of a three-dimensional iron-clad temperature realized by the three-dimensional iron-clad temperature visualizing unit in FIG. 1; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an apparatus and method for monitoring the iron-clad temperature according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is an exemplary view showing a schematic configuration of an iron-clad temperature monitoring apparatus in a blast furnace according to an embodiment of the present invention.

As shown in FIG. 1, the iron-clad temperature monitoring apparatus according to the present embodiment includes an iron-clad temperature detecting unit 110, a stave temperature detecting unit 120, a iron-clad temperature calculating unit 130, And a three-dimensional annealing temperature visualization unit 150. The three-

The iron core temperature detection unit 110 detects the iron core temperature at the corresponding point (that is, the iron core point at which the temperature sensor is installed) using at least one temperature sensor provided at an interval around the iron core.

For example, referring to FIG. 6, 60 temperature sensors (B2: 60EA) and 30 temperature sensors (B3: 30EA) are installed at predetermined intervals in the lower part of the blast furnace . However, it should be noted that the number of the temperature sensors installed is exemplarily described and can be changed.

The stave temperature detecting unit 120 detects an internal temperature of a corresponding point (that is, an inner wall point where the temperature sensor is installed) using at least one temperature sensor installed at an interval around the stave of the blast furnace, do.

For example, referring to FIG. 6, a predetermined number of temperature sensors (T / C) are provided at predetermined intervals in the middle of the blast furnace (for example, S1 to S4) .

The iron skin temperature calculating unit 130 calculates the external iron skin temperature corresponding to the internal point of the spot by using the internal temperature of the point detected by the stave temperature detecting unit 120.

If, for example 4, the furnace temperature in the (T _{s, 1),} while passing through the stacking eve (Stave) (A) for a given thickness (L _A) falls in the temperature (T _1), again given thickness (L _B ) refractory material (B) falls, the temperature of the abutting portion and cheolpi (C) further passing through the (T ₁ in - T _2), again for a given thickness (L _C) in contact cheolpi with the air while passing through the cheolpi (C) of the outer The temperature (Ts _{, 3} ) is further reduced.

Accordingly, when the internal temperature of the blast furnace (stave temperature) is detected, the annealing temperature calculating unit 130 predicts (calculates) the annealing temperature using the heat conduction & convection equation.

However, the heat (temperature) to be transferred may vary depending on the conduction coefficient (k _A , k _B , k _C ) of each material constituting the furnace body of the blast furnace, That is, considering the conduction coefficient) (see Fig. 5).

FIG. 5 is a graph showing the results of verifying accuracy by comparing the iron-clad temperature calculated by the iron-clad temperature calculator with the actual temperature in FIG. 1, (K = 0.25), it can be seen that there is a considerable difference from the measured value (measured temperature). When the accurate conduction coefficient is reflected (for example, K = 0.18) .

That is, when the internal temperature of the blast furnace (stave temperature) is detected as described above, the annealing temperature calculating unit 130 can predict (calculate) the annealing temperature using the heat conduction & convection equation reflecting the accurate conduction coefficient.

Here, the conduction coefficient may be detected by an experiment or provided by a manufacturer. In addition, since the heat conduction & convection equation can use an open equation, description thereof will be omitted in the present embodiment.

The iron core temperature interpolating unit 140 calculates the iron core temperature of the corresponding point detected by the iron core temperature detecting unit 110 and the corresponding point detected at the iron core temperature calculating unit 130 (That is, a point between the points where the temperature sensor is not installed) is interpolated by using the iron-clad temperature of the iron-clad iron.

For example, when it is assumed that the point where the temperature sensor is installed is the intersection of the lines drawn on the checkerboard, interpolation of the temperature deviation for the left and right straight section and interpolation of the alternative temperature deviation can be performed for the upper and lower straight section.

For example, let A and B be the deviations of the positions of the temperature sensors (for example, T1, T2, T3, T4, etc.) at each point of the iron pipe, L be the distance between the temperature sensors, (L-1 / n) + B * 1 / n) / L, it is possible to perform the interpolation. However, since the interpolation method is exemplarily described to help understand the temperature interpolation of the present embodiment, it is not necessary to necessarily apply the finite temperature interpolation of the present embodiment, and it is possible to interpolate by using another public interpolation formula do.

As described above, in the case where a plurality of iron spots in the blast furnace (for example, a first point with an iron-based temperature sensor, a second point corresponding to a point where the furnace inner temperature sensor is located, and an interpolation between the first point and the second point Dimensional finishing temperature visualization unit 150, as shown in FIG. 6, realizes the outline of the blast furnace in three dimensions and corresponds to the plurality of points (For example, red to blue).

FIG. 6 is a view showing a configuration of a real-time monitoring screen of a three-dimensional iron-clad temperature realized by the three-dimensional iron-clad temperature visualizing unit in FIG. 1, wherein the outer shape of the three- do. At this time, the rotational speed which rotates automatically can be adjusted. Of course, the manager (user) may monitor the shape of the three-dimensional blast furnace while manually rotating the shape.

In addition, it is possible to display the outline of the three-dimensional blast furnace viewed from a specified angle (e.g., 0 degrees, 90 degrees, 180 degrees, 270 degrees) by dividing the area of the monitoring screen, A graph of the degree of temperature, and a graph of the result of counting the cumulative time of the high temperature exposure of iron ions.

As described above, the present embodiment enables the manager to intuitively know the high temperature point through the shape of the three-dimensional blast furnace displayed on the screen. Therefore, there is an effect of improving the convenience of the manager who manages the iron-clad temperature.

However, with such an effect, it is difficult to cope with a specific point of the iron melt before it is elevated to a high temperature (designated temperature) at which cracking can occur. Therefore, in this embodiment, a method in which a specific point of the iron core can cope with a high temperature (a designated temperature) enough to cause a crack will be described with reference to FIG.

Although the functions of the components 130 to 150 are separately described in the present embodiment, in an alternative embodiment, one component (e.g., a controller) 200 that integrates the components 130 to 150 The above functions may be integrated. Therefore, a method for the ironing temperature monitoring by the controller 200 will be described below.

2 is a flowchart for explaining a method of monitoring the iron-clad temperature according to an embodiment of the present invention.

As shown in FIG. 2, the control unit 200 visualizes the iron core temperature of the blast furnace in a three-dimensional shape on the basis of the temperature of each point of the iron pellet and outputs it to the screen (S101).

As described above, the ironing temperature of the blast furnace is plotted in a three-dimensional shape and output to the screen, whereby the manager can easily monitor the ironing temperature. However, as described above, the current temperature can be monitored only through the three-dimensional shape, and it is not possible to predict in advance a point at which the temperature reaches the designated high temperature.

Therefore, the control unit 200 can control the temperature of the steel pipe at each point of the steel pipe (e.g., the first point of the steel pipe temperature sensor, the second steel pipe point corresponding to the point where the steel pipe internal temperature sensor is located, (The third point of the iron pellet calculated by interpolation of the temperature of the molten iron) (S102).

Here, the temperature rising rate means a slope of a rate at which the temperature rises with time, and the time to reach a specified temperature (high temperature) becomes faster as the slope becomes higher. Therefore, in general, when the manager finds a danger point (high temperature point) and takes into account the time required to cope with it (for example, nitrogen injection), the temperature rise rate of each point of the iron is detected before the time required for the response There is a need.

The controller 200 detects a point at which the temperature increase rate is equal to or higher than a preset reference temperature (S103).

According to the result of the detection (S103), the control unit (200) displays a point where the temperature rising rate is higher than a predetermined reference level on a screen in which the ironing temperature of the blast furnace is displayed in a three-dimensional shape, (E.g., a visual warning, an audible warning, or a tactile warning) through the use of a warning message (S104).

Accordingly, the manager can quickly respond (e.g., inject nitrogen) to the danger point (high temperature point) within a stable time after the warning is output.

As described above, cracks are generated in the steel sheets due to thermal expansion or the like when the steel cladding temperature of the blast furnace rises to a temperature higher than the predetermined temperature (refer to Fig. 3), thereby stopping the operation of the blast furnace for welding the cracks. . Therefore, it is necessary to monitor in real time so that the iron-clad temperature of the blast furnace does not rise above a predetermined temperature.

However, since the manager's response may be delayed when the alarm is output at the predetermined temperature, the present embodiment can be applied to a case where the temperature rise rate is high (i.e., the temperature has not yet reached the specified temperature, An alarm is output to a point where temperature is likely to be high), so that the manager can respond quickly.

As described above, according to the present embodiment, the temperature of the outside of the blast furnace is calculated using the stave temperature inside the blast furnace, then visualized and displayed in a three-dimensional form, and an alarm is output for the hot- This has the effect of enabling the administrator to respond quickly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand the point. Accordingly, the technical scope of the present invention should be defined by the following claims.

110: ironing temperature detector
120: Stave temperature detector
130: ironing temperature calculation unit
140: iron fiber temperature interpreter
150: Three-dimensional scouring temperature visualization part
200:

Claims (8)

An iron-clad temperature detector for detecting a iron-clad temperature at the point using at least one temperature sensor installed around the iron core of the furnace;
A stave temperature detector for detecting an internal temperature of a corresponding point using at least one temperature sensor installed around an internal stave of the blast furnace;
An iron-annealing temperature calculation unit for calculating an iron-annealing temperature corresponding to an internal point of the point by using the internal temperature of the corresponding point detected by the stave temperature detecting unit;
An iron core temperature interpolating unit for interpolating the iron core temperature at a point between the iron core temperature at the corresponding point detected by the iron core temperature detection unit and the iron core temperature at the corresponding point calculated at the iron core temperature calculation unit; And
Wherein the shape of the blast furnace is three-dimensionally realized, and each of at least one or more iron-clad points detected, calculated or interpolated through the iron-clad temperature detector, the iron-clad temperature calculator, And a three-dimensional sculpting temperature visualization unit displaying the three-dimensional sculpting temperature in color.
The apparatus according to claim 1, wherein the three-
Wherein at least one of the at least one or more fan-shaped spots is automatically rotated on the screen on the outline of the three-dimensional blast furnace indicated by the designated temperature color corresponding to the temperature,
Automatically rotates according to a predetermined rotation speed,
And rotates in real time in response to input information from an administrator or a user.
The method according to claim 2, wherein the three-
Dimensional shape of the three-dimensional blast furnace viewed from four predetermined angles at the same time,
Wherein the graph of the iron oxide temperature of the blast furnace, the real time iron oxide temperature graph by angle, and the iron oxide temperature cumulative time counting result graph are additionally displayed.
The method according to claim 1,
And a control unit for integrally performing functions of the iron skin temperature calculating unit, the iron skin temperature interpreting unit, and the 3D skin temperature visualizing unit,
Wherein the control unit detects an ignition point at which the rate of temperature rise is greater than a preset reference value, and outputs a warning.
[2] The method of claim 1,
A second point corresponding to a point where a temperature sensor is installed on the iron core, a point corresponding to a point where the temperature sensor is installed in the furnace, and a second point corresponding to a point of the iron pen calculated by interpolation between the first point and the second point. And the third point is at least one of the three points.
Visualizing the iron-clad temperature of the blast furnace as a three-dimensional shape on the basis of the temperature of each point of the blast furnace and outputting it as a screen;
The control unit calculating a temperature increase rate of each point of the blast furnace steel;
Detecting a point where the temperature rising rate is equal to or higher than a preset reference; And
Wherein the control unit displays on the screen the temperature of the blast furnace in the blast furnace in the form of a three-dimensional shape and displays at least a point where the temperature rising rate is equal to or higher than a predetermined reference, and displays at least one of visual warnings, audible warnings, And outputting a warning in a branching manner,
Wherein each of the points of the blast furnace slag has a first point at which a temperature sensor is installed in a scion, a second point at which a temperature sensor is installed in the furnace, And the third point of the iron pellet calculated by interpolation.
7. The method according to claim 6,
Means a slope of a rate at which the temperature rises with time, and the time required to reach a specified temperature increases with an increase in the slope.
The method according to claim 6, wherein, in the step of visualizing the iron-clad temperature of the blast furnace in a three-
Wherein,
Characterized in that the three-dimensional shape in which the iron-clad temperature of the blast furnace is visualized is automatically rotated on the screen, automatically rotated according to a predetermined rotation speed, or rotated in real time in response to input information from an administrator or a user The method comprising:

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