JP2022016036A - Coke oven drying burner - Google Patents

Abstract

To improve stability of a combustion state by suppressing variation in the amount of air supply.SOLUTION: A coke oven drying burner as a burner 40 to be used in drying an oven body at firing in an oven body facility of a coke oven having a structure in which a combustion chamber and a carbonization chamber are alternately aligned in the upper part of a regenerator has a double pipe structure including an inner pipe 41 to which fuel E is supplied, and an outer pipe 42 to which air is naturally supplied. The inner pipe 41 has a closed tip end surface, and is disposed with a plurality of gas holes 43 aligned along a pipe axis O direction on a tip end side lateral wall. The outer pipe 42 is formed with a plurality of air intake ports 44 formed in a long hole extending along the pipe axis O direction, at intervals in a circumferential direction, and is disposed with an opening/closing cylinder 45 coaxially disposed as the outer pipe 42, and disposed so as to be slidable in the pipe axis O direction. The opening/closing cylinder 45 is positioned in an arbitrary position between a fully-closed position and a fully-opened position with respect to the air intake ports 44.SELECTED DRAWING: Figure 6

Description

The present invention relates to a coke oven drying burner at the time of burning in a coke oven body equipment.

Conventionally, as a coke oven for producing coke by carbonizing coal charged in a carbonization chamber at a high temperature, a coke oven having a structure in which a plurality of carbonization chambers and a combustion chamber are alternately arranged above a heat storage chamber is provided. Has been done. In this coke oven, fuel gas and air are supplied from the heat storage chamber to the combustion chamber and burned, coal is charged into the carbonization chamber provided adjacent to the combustion chamber, and the coal is carbonized at a high temperature. Manufacture coke.

The furnace body equipment of such a coke furnace is constructed with refractory bricks, and the furnace body after the furnace construction is in a state of being moistened with moisture contained in the refractory bricks themselves and the joint mortar. For this reason, it is necessary to sufficiently dry the furnace body prior to the burning to start the actual operation. Drying of the furnace body after the construction of the furnace is also carried out in a furnace other than the coke furnace, but in particular, the furnace body of the coke furnace is divided into a heat storage chamber, a combustion chamber, a carbonization chamber and a plurality of furnace chambers. Due to its structure, in general, fuel such as COG and light oil is burned in the carbonization chamber, and the combustion exhaust gas is guided to the entire furnace body such as the combustion chamber, bellows, heat storage chamber, and horizontal flue, and finally. The furnace body is dried by discharging the combustion gas to the atmosphere from the flue and the chimney.

As a method for drying the furnace body, for example, it is known to dry the coke oven using a burner installed on the furnace lid (see, for example, Patent Document 1).
Here, silica stone brick is generally used as the furnace material of the coke oven, and there is a possibility that cracks may occur due to the volume change accompanying the phase transition at the time of drying and raising the temperature after the furnace is built. In order to avoid this, it is necessary to slow down the temperature rise rate, especially in the temperature range of 250 ° C or less at the initial stage of drying, the temperature rise rate is extremely slowed down, and then the brick temperature is gradually increased. The temperature is raised until the temperature reaches 800 ° C.

By the way, when a burner is arranged in the carbonization chamber and the combustion exhaust gas is used to dry the furnace body, the burner is installed near the inlet of the carbonization chamber, and the combustion frame extends in the depth direction of the carbonization chamber. , The temperature deviation of the combustion frame occurs in the depth direction of the carbonization chamber. Therefore, in order to suppress the occurrence of cracks in the silica stone bricks constituting the furnace wall of the carbonization chamber, it is necessary to monitor the temperature of the furnace wall position of the carbonization chamber, which is the highest temperature by the combustion frame, and raise the temperature. Therefore, it is necessary to further slow down the rate of temperature rise of the furnace body by the burner, and there is a problem that the drying period becomes very long.
Therefore, in order to suppress the temperature deviation in the carbonization chamber due to the combustion frame of the burner, the combustion frame of the burner is shortened and burned so that the combustion frame of the burner does not directly heat the furnace wall of the carbonization chamber. It is conceivable that the carbonization chamber is heated by the apparent heat of the exhaust gas.

By the way, the burner described above has a double pipe structure including an inner pipe to which fuel is supplied and an outer pipe to which air is naturally supplied. The inner pipe is provided with a plurality of gas holes on the side wall on the tip side while the tip surface thereof is closed. The outer pipe is formed in an elongated hole extending along the pipe axis direction of the outer pipe, and a plurality of air intakes are formed at intervals in the circumferential direction. The outer pipe is provided with an opening / closing cylinder that is coaxially provided and is provided so as to be rotatable and slidable in the circumferential direction so as to rotate around the pipe axis. An opening is formed in the opening / closing cylinder so as to coincide with the air intake of the outer pipe. The opening of the air intake is fixed by the rotary slide of the opening / closing cylinder, and the amount of air supplied into the outer pipe is adjusted.

Japanese Unexamined Patent Publication No. 2017-171901

However, in the coke oven drying burner used for drying the furnace body at the time of burning in the furnace body equipment of the coke oven, an opening / closing cylinder that rotates and slides with respect to the outer pipe as described above is provided to adjust the air supply amount. In the burner, when manufacturing the openings of the air intakes arranged in the circumferential direction of the outer pipe, there is a limit in the manufacturing accuracy and a manufacturing error occurs. Further, even in the production of the opening formed in the opening / closing cylinder, a production error that deviates in the circumferential direction occurs.

Therefore, when the opening / closing cylinder is rotated to adjust the opening amount of the air intake, even if the opening / closing cylinder is stopped at a predetermined rotation position and the air intake is adjusted to a predetermined opening, it is manufactured as described above. Due to the error, not all of the plurality of air intakes had the same opening amount, and the opening area varied. For example, one adjacent in the circumferential direction has an opening of 50%, and the other has an opening of 30%. Since the amount of air supplied varies in this way, it is difficult to stabilize the combustion state in the entire coke oven, and there is room for improvement in that respect.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a coke oven drying burner capable of suppressing variations in the amount of air supply and improving the stability of the combustion state.

In order to achieve the above object, in the coke oven drying burner according to the present invention, the furnace body drying at the time of burning in the furnace body equipment of the coke oven having a structure in which the combustion chamber and the carbonization chamber are alternately arranged in the upper part of the heat storage chamber. It is a coke oven drying burner used for cooking, and has a double pipe structure including an inner pipe to which fuel is supplied and an outer pipe to which air is naturally supplied. The tip surface is closed and a plurality of gas holes are provided on the side wall on the tip side, and the outer pipe is formed into elongated holes extending along the pipe axis direction of the outer pipe, and a plurality of holes are spaced apart in the circumferential direction. An air intake is formed, and an opening / closing cylinder provided coaxially with the outer pipe and slidable in the direction of the pipe axis is provided, and the opening / closing cylinder is in a fully closed position with respect to the air intake. It is characterized in that it is positioned at an arbitrary position between the fully open position and the fully open position.

In the present invention, the opening amount of the air intake can be adjusted by sliding the opening / closing cylinder in the direction of the pipe axis with respect to a plurality of air intakes arranged at intervals in the circumferential direction of the outer pipe. In this case, each of the plurality of air intakes can be accurately adjusted to the same opening amount regardless of the slide position of the opening / closing cylinder.
Therefore, in the coke oven drying burner of the present invention, the amount of air sucked into the outer pipe from each air intake port becomes uniform and variation can be reduced. Thereby, it is possible to control so as to reduce the variation in the air ratio of many burners in the drying process. Therefore, since combustion is stable even in a wide combustion load range, stable drying can be performed in the entire region from the initial stage of drying to the latter half of drying.
Further, in this case, the variation in the air supply amount can be suppressed by a simple configuration in which the opening / closing cylinder is slid along the outer cylinder in the pipe axis direction.

Further, the coke oven drying burner according to the present invention is also characterized in that the opening / closing cylinder is fixed at an arbitrary position in the pipe axis direction and a positioning means for adjusting the opening amount of the air intake is provided. good.

According to such a configuration, the slide position of the opening / closing cylinder can be positioned at an arbitrary position with high accuracy by the positioning means, and the opening amount of the air intake can be easily adjusted with a simple structure.

Further, in the coke oven drying burner according to the present invention, it is preferable that the opening / closing cylinder is arranged on the outer peripheral side of the outer pipe.

With such a configuration, the opening / closing cylinder can be visually observed from the outside, and the position of the opening / closing cylinder positioned in the pipe axis direction can be easily confirmed.

According to the coke oven drying burner of the present invention, it is possible to suppress the variation in the air supply amount and improve the stability of the combustion state.

It is a schematic explanatory drawing of the coke oven to which the furnace body drying method at the time of burning in the furnace body equipment of the coke oven which is one Embodiment of this invention is applied. It is sectional drawing explanatory drawing of the coke oven shown in FIG. It is sectional drawing of the carbonization chamber at the time of drying a furnace body. It is sectional drawing explanatory drawing of the burner which is one Embodiment of this invention. It is an enlarged view of the main part of the tip part of the inner tube shown in FIG. It is a half cross-sectional view which shows the structure of an opening / closing cylinder as seen from the side. (A) and (b) are diagrams showing the analysis results of Examples. (A) and (b) are diagrams showing the analysis results of Examples. It is a figure which shows the standard deviation of the temperature near the furnace wall for every blower suction pressure by an Example. It is a half cross-sectional view which shows the structure of the opening / closing cylinder by the modification, and is the figure corresponding to FIG.

Hereinafter, the coke oven drying burner according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the coke oven drying burner according to the present embodiment (burner 40 shown in FIGS. 3 and 4) has a coke oven having a structure in which combustion chambers and carbonization chambers are alternately arranged in the upper part of a heat storage chamber. It is used when the furnace body is dried at the time of burning in the furnace body equipment of 1.

As shown in FIG. 1, the coke oven 1 of the present embodiment includes a plurality of carbonization chambers 10 arranged in parallel, and a combustion chamber 20 is arranged between two adjacent carbonization chambers 10.
Then, as shown in FIG. 2, a heat storage chamber 30 is arranged below the carbonization chambers 10 and the combustion chambers 20 that are parallel to each other.

As shown in FIGS. 1 and 2, a plurality of inlets 12 for charging coal are formed on the upper surface of the carbonization chamber 10, and are generated from the carbonization chamber 10 at the end of the carbonization chamber 10. An ascending pipe 14 for discharging exhaust gas is arranged, and this ascending pipe 14 is connected to the dry men 3.
Further, the carbonization chamber 10 has a pair of furnace walls (on the combustion chamber 20 side) of the carbonization chamber 10 in order to efficiently transfer heat from the combustion chamber 20 provided between the parallel carbonization chambers 10 to the coal. The distance of the located furnace wall) is relatively short. That is, the furnace width of the carbonization chamber 10 is narrowed.

As shown in FIGS. 1 and 2, an inspection hole 21 for inspecting the inside of the combustion chamber 20 and a thermometer 22 are arranged on the upper surface of the combustion chamber 20. Further, as shown in FIG. 2, a partition wall 24 is arranged in the combustion chamber 20.
The heat storage chamber 30 has a configuration in which combustion gas and air are introduced into the combustion chamber 20 and exhaust gas in the combustion chamber 20 is discharged. As shown in FIG. 2, a supply pipe for the combustion gas and air is provided. It is connected to 5 and the flue 7.

Here, the furnace body equipment of the coke oven 1 including the carbonization chamber 10, the combustion chamber 20, and the heat storage chamber 30 is configured by stacking silicate bricks, and at the time of furnace construction, the silicate bricks, the joint mortar, and the like contain water. Therefore, it is necessary to dry the furnace body equipment before burning to start the actual operation.
For drying the furnace body equipment of the coke oven 1, as shown in FIG. 3, a burner 40 is inserted from the furnace lid of the carbonization chamber 10, and the combustion exhaust gas of the burner 40 is transferred from the carbonization chamber 10 to the combustion chamber 20 and the heat storage chamber 30. It will be implemented by introducing it to the entire furnace body equipment including it.

Next, the structure of the burner 40 in the present embodiment will be described in detail with reference to FIG.
The burner 40 has a double pipe structure including an inner pipe 41 to which the fuel E is supplied and an outer pipe 42 to which the primary air A1 is naturally supplied. In the present embodiment, a secondary air flow path 49 into which the secondary air A2 is introduced is formed between the outer pipe 42 and the burner tile 48.
Here, in the inner pipe 41 and the outer pipe 42, the tip end side is the front side in the pipe axis O direction, and the opposite side is the rear side.

The tip surface of the inner tube 41 is closed by the nozzle tip portion 41a, and a plurality of gas holes 43 (43A, 43B) are provided on the side wall on the tip side along the tube axis O direction (two rows in this embodiment). It is arranged and provided. The gas hole diameter of the gas hole 43 is within the range of 3 mm or more and 8 mm or less, and the number of gas holes 43 is within the range of 10 or more and 30 or less.
In this embodiment, as shown in FIG. 5, the gas holes 43A in the first row and the gas holes 43B in the second row near the nozzle tip 41a are provided in a staggered arrangement. The region in which these gas holes 43A and 43B are formed in the circumferential direction is within a range of 100 mm or more and 300 mm or less behind the nozzle tip portion 41a of the inner pipe 41.

The gas hole 43 has the formula (1) when the hole diameter of the gas hole 43A in the first row is d1 at the distance Y from the nozzle tip 41a side to the hole center C of the gas hole 43A in the first row. It is set to meet.

As shown in FIG. 5, the radius of curvature R of the outer peripheral edge portion 41d of the nozzle tip portion 41a of the inner tube 41 is 5 mm or more.
Further, it is set to satisfy (2) when the gas hole diameter of the gas hole 43A in the first row in the inner pipe 41 is d1 and the gas hole diameter of the gas holes 43B in the second and subsequent rows is d2. ..

The hole diameter ratio d1: d2 between the gas hole diameter d1 in the first row and the gas hole diameter d2 in the second and subsequent rows in the inner pipe 41 is 5: 3 to 7: 3.

Further, in the present embodiment, SUS304, which is a stainless steel that does not easily oxidize at high temperature, is adopted as the material of the inner tube 41. In the present embodiment, by using SUS304, it is possible to prevent iron oxide from being generated on the inner surface of the inner pipe 41 and suppress the blockage of the gas hole 43.
In this case, by using SUS304 for the inner tube 41 in which the gas hole 43 is formed, iron oxide is generated on the inner surface of the nozzle due to high temperature oxidation even when the temperature around the inner tube 41 exceeds 800 ° C. It is possible to prevent blockage due to generation and adhesion to the vicinity of the gas hole 43.

As shown in FIG. 4, the outer pipe 42 has a pipe main body 42A and an air introduction cylinder portion 42B provided on the rear end side (base end portion 42c side) of the pipe main body 42A. The air introduction cylinder portion 42B has a structure in which a plurality of air intakes 44 are formed at regular intervals in the circumferential direction, and the primary air A1 is naturally supplied into the outer pipe 42. A primary air flow path 42C is formed between the outer peripheral surface 41b of the inner pipe 41 and the inner peripheral surface 42a of the outer pipe 42.

As shown in FIG. 6, the air intake port 44 is arranged in a region of the air introduction cylinder portion 42B in front of the center in the pipe axis O direction. The air intake 44 is formed in an elongated hole extending along the pipe axis O direction of the outer pipe 42, and the plurality of air intakes 44 have the same shape. The outer pipe 42 is configured such that a plurality of air intakes 44 are arranged at regular intervals in the circumferential direction so that the primary air A1 is uniformly supplied into the outer pipe 42 in the circumferential direction. There is.

Then, as shown in FIG. 4, the pipe body 42A of the outer pipe 42 has an outer diameter dimension D and a length dimension T in the pipe axis O direction (distance from the outer pipe tip portion 42b to the outer surface 10a of the carbonization chamber 10). The relationship is set to satisfy equation (3).

As shown in FIG. 4, the nozzle tip portion 41a of the inner tube 41 is arranged at a position recessed from the outer tube tip portion 42b of the outer tube 42. The retreat distance is, for example, within the range of 150 mm or more and 600 mm or less.

Further, as shown in FIG. 6, the outer pipe 42 is provided coaxially with the outer pipe 42, and is provided with an opening / closing cylinder 45 slidable in the pipe axis O direction with respect to the air introduction cylinder portion 42B. The opening / closing cylinder 45 is configured to be able to be positioned at an arbitrary position between the closed position at which the plurality of air intakes 44 are fully closed and the fully open position at which the plurality of air intakes 44 are fully opened. The opening / closing cylinder 45 is arranged so as to cover the outer peripheral side of the air introduction cylinder portion 42B at the closed position, and retracts to the rear of the air introduction cylinder portion 42B at the fully open position.

A band-shaped guide guide 46 extending along the pipe axis O direction is provided on the outer peripheral surface 42e of the air introduction cylinder portion 42B. The guide guide 46 is formed with a slit 46A extending in the length direction, and a slide piece 45A provided on the opening / closing cylinder 45 is slidably supported along the slit 46A.
Further, the guide guide 46 is provided with a scale plate 46B (positioning means) on which the scale is displayed in the tube axis O direction. As a result, the opening / closing cylinder 45 can be positioned at an arbitrary position with respect to the air introduction cylinder portion 42B in accordance with the scale of the scale plate 46B.

Then, as shown in FIGS. 1 and 2, when the furnace body equipment of the coke oven 1 is dried, the burner 40 shown in FIG. 4 is used to burn the fuel E such as COG and light oil, and the burner 40 is used. The furnace wall of the carbonization chamber 10 is heated and dried by the sensible heat of the combustion exhaust gas, and the combustion exhaust gas is discharged to the carbonization chamber 10 and introduced into the entire furnace body equipment including the combustion chamber 20 and the heat storage chamber 30.
At this time, the temperature control during drying is to monitor the temperature of the hottest region of the furnace wall of the carbonization chamber 10 in order to suppress the generation of cracks due to the volume change due to the phase transition of the silica stone brick. become.

Next, the operation of the burner 40 described above will be described in detail with reference to the drawings.
In the burner 40 of the present embodiment, as shown in FIG. 6, the opening / closing cylinder 45 slides in the pipe axis O direction with respect to a plurality of air intakes 44 arranged at intervals in the circumferential direction of the outer pipe 42. The opening amount of the air intake 44 can be adjusted with. In this case, each of the plurality of air intakes 44 can be accurately adjusted to the same opening amount regardless of the slide position of the opening / closing cylinder 45.
Thereby, it is possible to reduce the variation in the amount of air suction sucked from each air intake port 44 into the outer pipe 42. Therefore, the air ratio of a large number of burners 40 in the drying step can be controlled so as to reduce the variation. Further, in this case, the opening / closing cylinder 45 is simply slid along the outer pipe 42 in the direction of the pipe axis O.

Further, in the present embodiment, the slide position of the opening / closing cylinder 45 can be positioned at an arbitrary position with high accuracy by the scale plate 46B provided on the air introduction cylinder portion 42B of the outer pipe 42, and the plurality of air intakes 44 can be positioned. The amount of opening can be easily adjusted with a simple structure.

In the burner 40 according to the present embodiment described above, it is possible to suppress variations in the amount of air supplied from the plurality of air intakes 44 of the outer pipe 42 into the outer pipe 42, and it is possible to improve the stability of the combustion state.

Next, an example carried out to support the effect of the coke oven drying burner according to the above-described embodiment will be described below.

(Example)
In the embodiment, in order to confirm the state of the air taken in from the plurality of air intakes 44 formed in the outer pipe 42 shown in FIG. 6, an FEM model is created and numerical simulation analysis is performed to confirm the effect. did.

In the numerical simulation analysis according to this embodiment, as shown in FIG. 7A, an embodiment model of the first opening / closing cylinder 451 that slides back and forth (slides in the pipe axis direction) shown in the above-described embodiment and the figure. As shown in 7 (b), the distribution of temperature and air flow velocity is analyzed using a comparative case that models a second opening / closing cylinder 452 that rotates and slides so that the sliding direction rotates in the circumferential direction with respect to the outer tube 42. As a result, variations in the air supply amount were confirmed.
Reference numeral 44A shown in FIG. 7A indicates an air intake whose opening degree has been adjusted by the first opening / closing cylinder 451. Reference numeral 44B shown in FIG. 7B has an opening degree adjusted by the second opening / closing cylinder 452. Shows the air intake.

7 (a) and 7 (b) are the results of numerical simulation analysis and show the distribution of the temperature in the vicinity of the tip portion (nozzle tip portion 41a) of the inner tube 41 in the burner.
As a result, the temperature in the vicinity of the gas hole (reference numeral K1 in the figure) in the first opening / closing cylinder 451 of the front / rear slide of the implementation case shown in FIG. It was confirmed that the temperature was higher than the temperature in the vicinity of the gas hole (reference numeral K2 in the figure) in the opening / closing cylinder 452. On the other hand, it was confirmed that the temperature of the region (reference numerals K3, K4) in front of the nozzle tip 41a was higher in the second opening / closing cylinder 452 than in the first opening / closing cylinder 451.

Further, as shown in FIGS. 8A and 8B, the distribution of the vector showing the air flow in the vicinity of the tip end portion (nozzle tip portion 41a) of the inner pipe 41 in the burner, which is the result of the numerical simulation analysis, is shown. Shows. FIG. 8 (a) shows an implementation case, and FIG. 8 (b) shows a comparative case.
In FIGS. 8A and 8B, the upper distribution map V1 is a diagram showing a burner and its front region, and the lower distribution map V2 is a burner portion (inside the frame of the figure) of the distribution map V1. It is an enlarged view.

Reference numerals E1 and E2 shown in FIGS. 8A and 8B indicate the air flow (vector) in the vicinity of the gas hole 43, respectively.
As a result, it was confirmed that the amount of air from the air intake port 44 toward the gas hole 43 was larger in the first opening / closing cylinder 451 of the front / rear slide of the implementation case than in the second opening / closing cylinder 452 of the rotating slide of the comparison case.

FIG. 9 shows the standard deviation of the temperature near the wall for each blower suction pressure (-mmAq) in the first opening / closing cylinder 451 of the front-rear slide and the second opening / closing cylinder 452 of the rotary slide in the experimental furnace. The blower corresponds to the above-mentioned outer pipe. The blower suction pressure was -5 mmAq, -10 mmAq, and -15 mmAq. As a result, it was confirmed that the standard deviation of each of the front and rear slides was smaller, and the suction pressure, that is, the variation in the air supply amount was smaller.

Although the embodiment of the coke oven drying burner according to the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately changed without departing from the spirit of the present invention.

For example, in the present embodiment, the opening / closing cylinder 45 is fitted to the outside of the air introduction cylinder portion 42B of the outer pipe 42 and slides in the pipe axis O direction along the outer peripheral surface 42e. It is not limited to the configuration. For example, the burner 40 shown in FIG. 10 may have a configuration in which the opening / closing cylinder 45 is slidably fitted in the pipe axis O direction on the inner peripheral surface side of the air introduction cylinder portion 42B of the outer pipe 42. Also in this case, the opening / closing cylinder 45 can be positioned at an arbitrary position between the fully closed position and the fully open position with respect to the plurality of air intakes 44 formed in the outer pipe 42 by sliding.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 Coke furnace 10 Carbonization chamber 11 Furnace wall 20 Combustion chamber
30 Heat storage chamber 40 Burner (coke oven drying burner)
41 Inner pipe 41a Nozzle tip 41b Outer pipe 42a Inner peripheral surface 42e Outer circumference 42B Air introduction cylinder 42C Primary air flow path 43 Gas hole 44 Air intake 45 Opening / closing cylinder 46 Guide guide 46B Scale plate (positioning means) )
A1 Primary air A2 Secondary air E Fuel O Pipe shaft

Claims (3)

A coke oven drying burner used for drying the furnace body at the time of burning in the furnace body equipment of a coke oven having a structure in which combustion chambers and carbonization chambers are alternately arranged in the upper part of the heat storage chamber.
It has a double pipe structure with an inner pipe to which fuel is supplied and an outer pipe to which air is naturally supplied.
The inner pipe is provided with a plurality of gas holes on the side wall on the tip side while the tip surface thereof is closed.
The outer pipe is formed in an elongated hole extending along the pipe axis direction of the outer pipe, and a plurality of air intakes are formed at intervals in the circumferential direction.
An opening / closing cylinder provided coaxially with the outer pipe and slidable in the direction of the pipe axis is provided.
A coke oven drying burner characterized in that the opening / closing cylinder is positioned at an arbitrary position between a fully closed position and a fully open position with respect to the air intake. The coke oven drying burner according to claim 1, wherein the opening / closing cylinder is fixed at an arbitrary position in the pipe axis direction, and a positioning means for adjusting the opening amount of the air intake is provided. The coke oven drying burner according to claim 1 or 2, wherein the opening / closing cylinder is arranged on the outer peripheral side of the outer pipe.

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