KR20190035211A - Device for reducing deviation of pulverized coal flow, and the method - Google Patents

Abstract

An apparatus for reducing deviation of pulverized coal flow rates and a method thereof are provided. According to the present invention, the apparatus for reducing deviation of pulverized coal flow rates comprises: a pulverized coal injection lance; a distributor connected to a transfer pipe and distributing pulverized coal into a plurality of pulverized coal pipes; and a pulverized coal injection rate control unit for controlling pulverized coal injection rates for each pulverized coal pipe.

Description

TECHNICAL FIELD [0001] The present invention relates to a device for reducing pulverized coal flow rate variation,

The present invention relates to a pulverized coal flow rate deviation reduction apparatus and a method thereof.

Generally, the blast furnace operation is to continuously supply iron ore and coke to the upper part of the blast furnace, to blow the hot wind to the bottom of the blast furnace to burn the coke, and to remove the impurities and oxygen of the iron ore using the generated heat and gas, Process.

The cokes produced by using hot blast furnace and iron ore reducing agent with strong point attraction force and ordinary coal are used, but the manufacturing process is complicated and the manufacturing cost is increased.

Therefore, in order to reduce the amount of expensive coke, an auxiliary fuel in the form of pulverized coal, in which low-priced semi-anthracite or tin-fired carbon is crushed, is immediately blown into the blast furnace tuyere.

As a result, it is possible to reduce the amount of coke used to reduce the cost of chartering, and at the same time, the space occupied by the coke within the limited blast furnace content can be filled with iron ore instead, which enables high-output operation.

In addition, when the internal heat of the blast furnace temporarily becomes insufficient, it temporarily recovers the pulverized coal to slow down the coke consumption rate, thereby slowing down the iron ore and coke dropping speed to recover the heat inside the blast furnace.

That is, if the descending speed of the iron ores and coke is slowed down, the residence time of the solid charge is increased, and the heat inside the blast furnace is recovered.

Because of these advantages, blast furnace operators continue to increase the amount of blast furnace blast furnace blast furnace blast furnace, and the amount of blast furnace blast furnace blast furnace is continuously increasing.

However, when the pulverized coal flow rate deviation occurs due to the shape of the pulverized coal distributor or the shape of the branch pipe, a descending velocity deviation of the charged material in the circumferential direction of the blast furnace occurs.

Such circumferential charge drop velocity deviations are caused by the asymmetric welded bar shape, the occurrence of a single layer of a coke slit layer formed in the fusing zone, and a variation in the furnace circumferential charge air gap.

In addition, when the airflow of the tuyere blowing gas rises, it leads to unstable gas flow and drift, local heat load increase of the furnace body, deviations in the temperature of charred wire, deterioration of gas utilization, increase of coke ratio, and so on.

Conventionally, there is a method of uniformly adjusting the pressure loss to the blast furnace to the blast furnace by partially inserting a pipe having a different diameter in the middle of the branch pipe in order to reduce the deviation of the pulverized coal flow rate in the circumferential branch pipe of the blast furnace.

As another method, there is a method of attaching a short-stroke type flow-regulating valve capable of opening adjustment to the stage immediately after the pulverized coal blow-in port.

However, in the conventional methods, the inner shape of the branch pipe is complicated, and the problem of clogging of the pulverized coal due to the complicated structure inside the valve for controlling the flow rate is frequently encountered, requiring frequent inspection and replacement, and being unable to be used for a long time .

SUMMARY OF THE INVENTION The present invention is directed to a pulverized coal flow rate reduction apparatus and method that can uniformly make the circumferential direction pulverized coal flow rate of the blast furnace without significantly deforming the conventional pulverized coal supply structure without accompanying branch pipe clogging.

A pulverized coal flow rate deviation reducing apparatus according to an embodiment of the present invention, and a pulverized coal receiving lance installed in a tuyere of a blast furnace to blow pulverized coal into the inside of the blast furnace.

The pulverized coal flow rate deviation reducing apparatus may include a distributor connected to the transfer pipe and distributing the pulverized coal conveyed through the transfer pipe to the plurality of pulverized coal carbonate tubes.

In addition, the pulverized coal flow rate deviation reducing apparatus may include a pulverized coal load control unit installed on a wall surface of the distributor, connected to the pulverized coal pipe, and controlling a pulverized coal intake amount per pulverized coal pipe.

The pulverized coal load control unit may include a rotatable pipe whose one end is rotatably inserted into a wall surface of the distributor and the other end is connected to the carbon molecular carbon dioxide pipe and whose interior is empty.

The pulverized coal blow-in amount control unit may include a pulverized coal inlet groove formed by cutting a part of one end of the rotatable pipe.

A part of the circumferential surface of one end of the rotatable pipe may be cut to form a cut surface.

The rotating pipe may be provided with a driving motor for adjusting the rotation angle of the rotating pipe.

The outer surface of the distributor may be provided with a guide pipe for guiding the rotation of the rotatable pipe.

And may include a pulverized coal flow meter installed in each of the plurality of pulverized coal carboniferous tubes to measure the pulverized coal flow rate.

The controller may further include a controller for calculating an average value of the pulverized coal flow rates measured by the pulverized coal flow meter and comparing the calculated average values with the measured flow rates of the pulverized coal flow meters.

The controller may control the drive motor to adjust the rotation angle of the rotatable pipe in the range of 0 to 180 degrees.

The controller may be such that the incision surface controls the drive motor so as to face upward or downward of the rotatable pipe.

Also, the method for reducing the pulverized coal flow rate variation according to an embodiment of the present invention may include a rotatable pipe laying step in which the cut-off surface of the rotating pipe installed in the distributor is horizontally oriented with respect to the ground.

The pulverized coal flow rate deviation reducing method may include a pulverized coal flow measuring step of measuring the pulverized coal flow rate passing through the plurality of pulverized coal branch tubes.

The method for reducing the pulverized coal flow rate deviation includes a step of calculating a deviation by calculating the average of the pulverized coal flow rates measured in the pulverized coal flow measuring step and comparing the calculated average value and the pulverized coal flow rate by each pulverized coal column .

The method for reducing the pulverized coal flow rate deviation may include a step of adjusting the rotational angle of the rotatable pipe in the range of 0 to 180 degrees when the deviation of each pulverized coal carbonate tube calculated in the deviation calculating step is equal to or greater than the set amount have.

The rotational angle adjusting step may be to control the rotational angle of the rotatable pipe such that the cut surface faces upward or downward of the rotatable pipe.

And a deviation checking step of displaying the deviation of each of the carbon steel core tubes calculated in the deviation calculating step in the circumferential direction of the blast furnace in the monitor to confirm the circumferential deviation.

And a flow control result ringing step of controlling the rotation angle of the rotating pipe and displaying the flow control result of each of the pulverized coal pipe branches in the circumferential direction of the blast furnace to the monitor part.

According to the embodiment of the present invention, it is possible to overcome the problem of pulverized coal clogging, which is a limitation of the method of partially inserting a tube having a different diameter in the middle of a conventional paper tube or attaching a flow regulating valve to a stage immediately after the distributor, The occurrence can be reduced.

As a result, problems such as circumferential loading speed drop in the blast furnace, uneven gas flow in the furnace, imbalance in the structure of the coke slit, increase in the local thermal load of the furnace, deviation in the heating temperature of the outlet line, decrease in the gas utilization rate, and increase in the coke ratio .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram for explaining an application part of a pulverized coal flow quantity deviation reducing apparatus according to an embodiment of the present invention; FIG.
2 is a schematic partial schematic view of a device for reducing pulverized coal flow quantity deviation according to an embodiment of the present invention.
FIG. 3 is a view for explaining a flow control principle using a pulverized coal flow fluctuation reduction apparatus according to an embodiment of the present invention, and shows a state of increasing pulverized coal flow.
FIG. 4 is a view for explaining a flow control principle using a pulverized coal flow deviation reducing apparatus according to an embodiment of the present invention, showing a state of reducing pulverized coal flow.
FIG. 5 is a schematic overall configuration diagram of a pulverized coal flow quantity deviation reducing apparatus according to an embodiment of the present invention.
Fig. 6 is a diagram showing a comparison between the conventional example (a) of the pulverized coal flow in the circumferential direction and the case of the embodiment (b) of the present invention.
7 is a schematic block diagram of a pulverized coal flow rate variation reduction method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Wherever possible, the same or similar parts are denoted using the same reference numerals in the drawings.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

FIG. 1 is a schematic diagram for explaining an application part of a pulverized coal flow quantity variation reducing apparatus according to an embodiment of the present invention. FIG. 2 is a schematic partial configuration of a pulverized coal flow fluctuation reducing apparatus according to an embodiment of the present invention. .

FIG. 3 is a view for explaining a flow control principle using a pulverized coal flow fluctuation reduction apparatus according to an embodiment of the present invention, and shows a state of increasing pulverized coal flow.

FIG. 4 is a view for explaining a flow control principle using a pulverized coal flow deviation reducing apparatus according to an embodiment of the present invention, showing a state of reducing pulverized coal flow.

FIG. 5 is a schematic overall configuration diagram of a pulverized coal flow quantity deviation reducing apparatus according to an embodiment of the present invention.

1 to 5, a pulverized coal flow rate deviation reducing apparatus according to an embodiment of the present invention includes a tuyere 11 for supplying hot air into a blast furnace 10, An outflow port 13 and a pulverized coal blowing lance 15 installed in the tuyere 11 of the blast furnace 10 for blowing the pulverized coal into the blast furnace 10.

The pulverized coal flow rate deviation reducing apparatus includes a distributor for distributing the pulverized coal conveyed through the conveying pipe 20 to the pulverized coal pipe 17 and blowing it into the pulverized coal receiving lance 15, (30).

The plurality of carbon molecular carbon black tubes (17) are connected to the pulverized coal blowing lance (15), and the pulverized coal is blown into the pulverized coal blowing lance (15).

The dispenser 30 may be connected to a transfer pipe 20 for transferring the pulverized coal stored in the pulverized coal storage tank (not shown) to the distributor 30 by the transfer air.

A plurality of distributors 30 may be installed at regular intervals on the upper part of the blast furnace 10 for efficient pulverized coal distribution through the pulverized coal pipe 17. [

The pulverized coal flow rate deviation reducing apparatus is installed on the wall surface of the distributor 30 and is connected to the pulverized coal pipe 17 to control the amount of pulverized coal blown for controlling the amount of pulverized coal blown into the pulverized coal inlet lance 15 Amount control unit 100 according to an embodiment of the present invention.

One end of the pulverized coal blowing amount control unit 100 is rotatably inserted into the wall surface of the distributor 30 at an angle and the other end thereof is connected to the pulverized coal pipe 17. [

The pulverized coal load control unit 100 may include a rotating pipe 110 having an empty interior.

The pulverized coal blowing amount control unit 100 is formed by cutting a part of one end of the rotating pipe 110 and includes a pulverized coal inlet groove for feeding the pulverized coal supplied to the inside of the pulverizer 30 to the pulverized coal pipe 17 120).

The cross-sectional shape of the pulverized coal inlet groove 120 perpendicular to the longitudinal direction of the rotatable pipe 110 (in FIG. 3 and the direction XX in FIG. 4) is a semi-circular shape Lt; / RTI >

The cut-off surface 121 may be formed at one end of the rotatable pipe 110 to cut off a part of the circumferential surface to form the pulverized coal inlet groove 120.

The cut-out surface 121 may be formed to be convex so that the pulverized coal in the distributor 30 can be easily introduced into the pulverized coal inlet groove.

The cut-off surface 121 may be formed along the longitudinally central portion of the rotatable pipe 110 (in FIG. 3 and in the direction of X-X in FIG. 4) for easy pulverized coal inlet volume control of the pulverized coal inlet groove 120.

The incision surface 121 may be arranged to be parallel to the ground surface or the installation surface to control the amount of the pulverized coal inlet of the pulverized coal inlet groove 120.

The rotatable pipe 110 may be provided with a drive motor 200 for adjusting the rotation angle of the rotatable pipe 110 to a predetermined angle.

The driving shaft (not shown) of the driving motor 200 may be coupled to one side of the rotating pipe 110 so as to rotate the rotating pipe 110 at a predetermined angle.

The rotational angle of the rotating pipe 110 is set to be within a range of 0 to 180 degrees in a clockwise or counterclockwise direction around the rotating pipe 110 so as to effectively control the amount of pulverized coal flowing into the pulverized coal inlet groove 120 .

The carbon molecular carbon fiber pipe (17) can be made of a flexible tube so as not to be disturbed when rotating the rotating pipe.

The rotating pipe 110 and the carbon powder pipe 17 may be rotatably coupled by providing bearings or the like instead of the pulverized coal pipe 17 so as not to interfere with rotation of the rotating pipe 110 .

In addition, a coupling hole 31 for rotatably inserting and coupling the rotatable pipe 110 may be formed on the wall surface of the distributor 30.

The rotatable pipe 110 is easily coupled to the coupling hole 31 and is formed in a cylindrical shape for smooth rotation. Accordingly, the coupling hole 31 can also be formed in a circular shape.

A guide pipe 300 for guiding the coupling and rotation of the rotatable pipe 110 may be installed on the outer surface of the distributor 30.

The guide pipe 300 may be formed as a hollow cylindrical shape for easy coupling of the rotatable pipe 110 and smooth rotation guidance.

The pulverized coal pipe 17 may be provided with a pulverized coal flow meter 400 for measuring the pulverized coal flow rate passing through each of the pulverized coal pipe tubes 17.

The pulverized coal flow rate deviation reducing apparatus is connected to each of the pulverized coal flow meters 400 and calculates an average value of the pulverized coal flow rates measured by the pulverized coal flow meters 400. The calculated average value and the measured flow rate And a controller 500 for calculating the deviation by comparing the calculated values.

The controller 500 is connected to the drive motor 200 and can adjust the rotation angle of the drive motor 200 so as to control the flow rate by a flow rate corresponding to a deviation of the pulverized coal flowmeter 400.

When the flow rate measured by the pulverized coal flow meter 400 is the maximum value smaller than the average value, the controller 500 controls the driving motor 110 to rotate the rotating pipe 110 such that the cut- It is possible to control the rotation angle of the rotating shaft 200.

The controller 500 controls the driving motor 200 such that the cut-off surface 121 faces upward of the rotating pipe 110. In this case, Thereby rotating the rotatable pipe 110 (see FIG. 3).

When the flow rate measured by the pulverized coal flow meter 400 is higher than the average value, the controller 500 controls the driving motor 110 to rotate the rotating pipe 110 such that the cut- It is possible to control the rotation angle of the rotating shaft 200.

The controller 500 controls the drive motor 200 so that the cut surface 121 faces downward of the rotating pipe 110 when the flow rate to be blown through the pulverized coal pipe 17 is to be reduced to the maximum Thereby rotating the rotatable pipe 110 (see FIG. 4).

The controller 500 controls the rotation angle of the drive motor 200 to control the rotation angle of the rotary pipe 110 in accordance with the flow rate required for solving the flow rate deviation, Can be adjusted in the range of 0 to 180 degrees.

That is, when increasing the flow rate of the powdered carboniferous tubing 17 by the predetermined amount, the controller 500 controls the direction in which the cut-off surface 121 is directed to an angle within the range of 90 to 180 degrees with respect to the horizontal plane The rotation angle of the rotatable pipe 110 can be adjusted.

Here, the angle of 180 degrees with the horizontal plane indicates the direction in which the cut surface 121 faces the horizontal plane (X-X plane) and the upper face of the rotating pipe 110.

The angle of 90 degrees with the horizontal plane indicates the direction in which the cut-off surface 121 is oriented perpendicular to the horizontal plane (X-X plane).

When the flow rate of the pulverized coal pipe 17 is reduced by the predetermined amount, the controller 500 sets the direction in which the cut-off surface 121 faces to an angle within the range of 0 to 90 degrees with respect to the horizontal plane (plane XX) The rotation angle of the rotatable pipe 110 can be adjusted.

Here, the angle of 0 degrees with the horizontal plane indicates the direction in which the cut surface 121 faces the horizontal plane (X-X plane) and the bottom plane of the rotating pipe 110.

The pulverized coal flow rate deviation reducing apparatus further includes a monitor connected to the controller 500 for displaying the deviation of each pulverized coal carbonate tube calculated by the controller 500 in the circumferential direction of the blast furnace and confirming the flow rate control result of the controller 500 (600).

Hereinafter, the operation of the pulverized coal flow deviation reducing apparatus according to one embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG.

First, the pulverized coal inlet groove 120 and the cut-out surface 121 of the rotating pipe 110 installed in the distributor 30 are disposed so as to face the ground horizontally.

Then, the pulverized coal flow meter 400 installed in each of the pulverized coal pipe tubes 17 measures the pulverized coal flow rate, and the measured flow rate information is transmitted to the controller 500.

The controller 500 receives the flow rate information of each of the pulverized coal pipe branches transmitted from each pulverized coal flow meter 400 and calculates the average value of the pulverized coal flow rates and compares the calculated average value with the measured flow rate of each pulverized coal flow meter 400, To calculate the flow rate deviation.

The controller 500 controls the rotation angle of the drive motor 200 according to the flow rate required for solving the flow rate variation when the deviation of each of the pulverized coal pipes 17 is equal to or larger than a predetermined amount, The rotation angle can be adjusted in the range of 0 to 180 degrees.

That is, when increasing the flow rate of the powdered carboniferous tubing 17 by the predetermined amount, the controller 500 determines that the direction in which the cut-off surface 121 faces is in the range of 90 to 180 degrees with respect to the horizontal plane The rotation angle of the rotatable pipe 110 can be adjusted.

When the flow rate of the powdered carboniferous tubule 17 is reduced by the predetermined amount, the controller 500 determines that the direction in which the cut surface 121 is directed is an angle of 0 to 90 degrees with respect to the horizontal plane (XX plane) The rotation angle of the rotatable pipe 110 can be adjusted.

When the flow rate measured by the pulverized coal flow meter 400 is smaller than the average value, the cutting motor 121 drives the driving motor 200 to rotate the rotating pipe 110 so as to face the rotating pipe 110, Can be controlled.

That is, when the flow rate to be blown through the carbon molecular carbon dioxide pipe 17 is to be maximized, the rotating pipe 110 is rotated by the driving motor 200 controlled by the controller 500, And is turned upwardly of the typical pipe 110 (see FIG. 3).

3, when the cut-off surface 121 is directed upwardly of the rotating pipe 110, the pulverized coal particles flow into the pulverized coal inlet groove 120 by the air flow conveyed from the lower part of the distributor 30 to the upper part, So that the flow rate is increased.

When the flow rate measured by the pulverized coal flow meter 400 is higher than the average value, the controller 500 rotates the rotating pipe 110 so that the cut surface 121 faces downwardly inside the distributor 30 The rotation angle of the driving motor 200 can be controlled.

That is, when the flow rate to be blown through the pulverized coal pipe 17 is to be reduced to the maximum, the controller 500 controls the drive motor 200 so that the cut surface 121 faces downwardly of the rotating pipe 110, The conventional pipe 110 can be rotated (see FIG. 4).

4, when the cut surface 121 is directed downwardly of the rotating pipe 110, the pulverized coal particles, which are discharged into the pulverized coal pipe 17 together with the transported air, are discharged to the lower portion of the distributor 30 by gravity And the flow rate is reduced because it is re-dropped.

In addition, the monitor unit 600 can be used to display the deviation of each pulverized coal carbonate tube calculated by the controller 500 in the circumferential direction of the blast furnace to check the flow rate control result of the controller 500.

Thus, by controlling the deviation of the pulverized coal flow rate in the blast furnace for each pulverized coal pipe, it is possible to make the pulverized pulverized coal flow rate uniform in the blast furnace.

In the case of the conventional example shown in Fig. 6 (a), there is a large deviation in the flow direction of the pulverized coal in the blast furnace, thereby causing problems such as nozzle damage and deposit formation.

In contrast to this, in the case of the embodiment of the present invention shown in FIG. 6 (b), the pulverized coal flow rate deviation in the blast furnace is largely reduced by providing the pulverized coal blowing amount control section, and the balance in the circumferential direction of the blast furnace It can be seen that it recovered greatly.

7 is a schematic configuration diagram of a pulverized coal flow rate deviation reduction control method according to an embodiment of the present invention.

The method for reducing pulverized coal flow rate variation according to an embodiment of the present invention is the same as the apparatus for reducing pulverized coal flow fluctuation variation according to an embodiment of the present invention except for the details described below. Therefore, detailed description thereof will be omitted.

The pulverized coal flow rate deviation reducing method according to an embodiment of the present invention includes a rotatable pipe arranging step S10 (S10) in which a cut-off surface 121 of a rotatable pipe 110 installed in a distributor 30 is oriented horizontally to the ground, ).

And a pulverized coal flow measuring step (S20) of measuring the pulverized coal flow rate passing through each of the pulverized coal tubings (17) by the pulverized coal flow meter (400) provided in each of the plurality of pulverized coal pipe tubes (17).

A deviation calculation step of calculating an average of the pulverized coal flow rates measured in the pulverized coal flow measurement step S20 and comparing the calculated average values and the measured flow rates to the pulverized coal flow meters 400, (S30).

And a deviation checking step (S40) of displaying the deviation according to each of the carbon steel core tubes calculated in the deviation calculating step S30 to the monitor 600 in the circumferential direction of the furnace to confirm the circumferential deviation.

When the deviation calculated by the deviation calculating step S30 is equal to or larger than the set amount, the rotation angle adjusting unit adjusts the rotation angle of the rotating pipe 110 in the range of 0 to 180 degrees according to the flow rate required for eliminating the deviation. Step S50.

When the flow rate measured in the pulverized coal flow measuring step S20 is the smallest than the average value, the cutting angle adjusting step S50 is performed such that the cut surface 121 faces the upper side of the rotating pipe 110, The rotation angle can be controlled.

When the flow rate measured in the pulverized coal flow measuring step S20 is higher than the average value, the cutting angle adjusting step S50 is performed such that the cut surface 121 faces the rotating pipe 110 downwardly of the rotating pipe 110, Can be controlled.

When the flow rate of the pulverized coal pipe 17 is increased by a predetermined amount, the rotation angle adjusting step S50 is performed such that the direction in which the cut surface 121 faces is in the range of 90 to 180 degrees with respect to the horizontal plane As shown in Fig.

The rotation angle adjustment step S50 is a step of adjusting the rotation angle of the pulverized coal pipe 17 by a predetermined amount so that the direction in which the cut surface 121 is directed is an angle in the range of 0 to 90 degrees with respect to the horizontal plane As shown in Fig.

In addition, a flow control result input step (S60) for displaying a flow control result for each of the pulverized coal pipes according to the rotation angle adjustment of the rotary pipe 110 in the circumferential direction of the blast furnace to the monitor 600, . ≪ / RTI >

Each of the above steps is repeatedly executed automatically to make the flow rate uniform for each of the pulverized coal branch tubes and to be introduced into the inside of the blast furnace.

10: blast furnace
17: Pulverized coal pipe
30: Dispenser
100: Pulverized coal blowing amount control section
110: Rotary pipe
120: Pulverized coal inlet groove
121: incision surface
200: drive motor
300: Guide pipe

Claims (12)

A pulverizing coal blowing lance installed in the tuyere of the blast furnace to blow the pulverized coal into the inside of the blast furnace,
A distributor connected to the conveying pipe and distributing the pulverized coal conveyed through the conveying pipe to the plurality of pulverized coal carbonyl tubes,
A pulverized coal blowing amount control unit for controlling a pulverized coal blowing amount by the pulverized coal pipe, connected to the pulverized coal pipe,
Wherein the flow rate deviation of the pulverized coal is calculated. The method according to claim 1,
The pulverized coal blow-
One end of which is rotatably inserted into a wall surface of the distributor and the other end of which is connected to the carbon molecular fuel tube and has a hollow interior,
And a pulverized coal inlet groove formed by cutting a part of one end of the rotatable pipe. 3. The method of claim 2,
Wherein a part of the circumferential surface of one end of the rotatable pipe is cut to form a cut surface. The method of claim 3,
Wherein the rotatable pipe is provided with a drive motor for adjusting the rotation angle of the rotatable pipe. 5. The method of claim 4,
And a guide pipe for guiding the rotation of the rotatable pipe is provided on an outer surface of the distributor. 6. The method according to any one of claims 1 to 5,
A pulverized coal flow meter installed in each of the plurality of pulverized coal pipe tubes for measuring the pulverized coal flow rate,
And a controller for calculating an average value of the pulverized coal flow rates measured by the pulverized coal flowmeter and comparing the calculated average values with the measured flow rates of the pulverized coal flow meters to calculate a deviation. The method according to claim 6,
Wherein the controller controls the drive motor to adjust the rotation angle of the rotary pipe within a range of 0 to 180 degrees. 8. The method of claim 7,
Wherein the controller controls the drive motor such that the cut surface faces upward or downward of the rotatable pipe. A rotatable pipe arrangement step in which the cut-off surface of the rotatable pipe installed in the distributor is oriented horizontally to the ground,
A pulverized coal flow measurement step of measuring a pulverized coal flow rate passing through a plurality of pulverized coal pipe branches,
A deviation calculating step of calculating an average value of the pulverized coal flow rates measured in the pulverized coal flow measuring step and comparing the calculated average value with the flow rates of the pulverized coal pipe tubes to calculate a deviation of each pulverized coal pipe tube;
A rotation angle adjusting step of adjusting the rotation angle of the rotating pipe in the range of 0 to 180 degrees when the deviation of each of the carbon steel branch pipes calculated in the deviation calculating step is equal to or larger than a set amount;
Wherein the method comprises the steps of: 10. The method of claim 9,
Wherein the rotating angle adjusting step controls the rotating angle of the rotating pipe such that the cut surface faces upward or downward of the rotating pipe. 10. The method of claim 9,
And a deviation checking step of displaying deviation in each of the pulverized coal pipe tubes calculated in the deviation calculating step in the circumferential direction of the blast furnace in the monitor to confirm the circumferential deviation. 11. The method according to claim 9 or 10,
And controlling flow rate of the pulverized coal pipe to the monitor unit in a circumferential direction of the blast furnace after the rotation angle of the rotatable pipe is adjusted.

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