JP7462082B2 - How to install furnace lid cleaning equipment - Google Patents

Description

The present invention relates to a method for installing a furnace lid cleaning device.

Technology for cleaning the lid of a coke oven is known. In Patent Document 1, the applicant discloses a lid cleaning device equipped with a nozzle unit that sprays high-pressure water. This lid cleaning device is equipped with a nozzle unit including a chamber into which high-pressure water is injected at one end and which has an outlet at the other end, and a rotor with a tubular nozzle housed in the chamber. The rotor rotates under its own power within the chamber and sprays high-pressure water from the tubular nozzle. With this configuration, the impact point of the high-pressure water sprayed from the tubular nozzle rotates in a circular shape.

JP 2014-234466 A

When a coke oven is used, deposits such as tar and pitch accumulate on the lid that blocks the opening. If excessive deposits accumulate, they can get caught between the lid and the opening, reducing the airtightness between them. For this reason, it is advisable to regularly clean the lid, especially around the knife edge, to remove the deposits.

However, since the furnace lid cannot be used while it is being cleaned, there is a demand to clean the furnace lid efficiently and shorten the cleaning time.

The present invention was made in consideration of these problems, and one of its objectives is to provide a furnace lid cleaning device that can efficiently clean the furnace lid of a coke oven.

In order to solve the above problems, a furnace lid cleaning device according to one embodiment of the present invention is equipped with a liquid injection unit that injects cleaning liquid onto the part of the coke oven lid to be cleaned. The liquid injection unit has a single injection nozzle. The injection nozzle has an inner diameter at its tip in the range of 1 mm to 2 mm, and rotates by the pressure of the liquid around another axis that is inclined at an angle of 10° to 20° to the axis of the liquid injection unit. This furnace lid cleaning device is configured to keep the distance from the tip of the injection nozzle to the part to be cleaned in the range of 100 mm to 200 mm.

In addition, any combination of the above components, or mutual substitution of the components or expressions of the present invention between methods, systems, etc., are also valid aspects of the present invention.

One of the objectives of the present invention is to provide a furnace lid cleaning device that can efficiently clean the furnace lid of a coke oven.

1 is a schematic diagram illustrating an example of a furnace lid cleaning device according to a first embodiment. FIG. FIG. 2 is a perspective view showing a liquid spraying unit of the furnace lid cleaning apparatus of FIG. 1. 2 is a diagram showing a cross section of a furnace lid and a liquid spraying portion of the furnace lid cleaning device of FIG. 1. FIG. 2 is a side view showing a schematic diagram of a liquid spraying unit and a part to be cleaned of the furnace lid cleaning device of FIG. 1. FIG. 2 is a side cross-sectional view showing a liquid spraying portion of the furnace lid cleaning apparatus of FIG. 1. 2 is a side cross-sectional view showing a nozzle retainer and a nozzle tip of the furnace lid cleaning apparatus of FIG. 1. 4 is a graph showing the relationship between the cleaning power and the distance from the injection nozzle of the furnace lid cleaning device of FIG. 1 to the part to be cleaned. 10 is another graph showing the relationship between the cleaning power and the distance from the injection nozzle of the furnace lid cleaning device of FIG. 1 to the part to be cleaned.

The inventors have conducted research into furnace lid cleaning devices from the perspective of making furnace lid cleaning more efficient, and have discovered that furnace lids can be cleaned efficiently by increasing the impact force per unit area that the cleaning water exerts on the part being cleaned (hereinafter referred to as "cleaning force") to a certain level or higher. The embodiment described below was created based on the results of this research in order to increase the cleaning force. The detailed configuration of the embodiment is described below.

The present invention will be described below based on preferred embodiments with reference to the drawings. In the embodiments and modified examples, the same or equivalent components and members are given the same reference numerals, and duplicated descriptions are omitted as appropriate. The dimensions of the members in each drawing are enlarged or reduced as appropriate for ease of understanding. Some of the members that are not important for explaining the embodiments are omitted in each drawing.
Furthermore, terms including ordinal numbers such as first, second, etc. are used to describe various components, but these terms are used only for the purpose of distinguishing one component from another component, and the components are not limited by these terms.

[First embodiment]
The configuration of the furnace lid cleaning device 100 according to the first embodiment will be described below with reference to Figures 1 to 8. Figure 1 is a schematic diagram showing a state in which a furnace lid 80 is cleaned using the furnace lid cleaning device 100. Figure 2 is a perspective view showing the liquid spraying unit 20 of the furnace lid cleaning device 100. Figure 3 is a diagram showing the liquid spraying unit 20 of the furnace lid cleaning device 100 and a horizontal cross section of the furnace lid 80.

For ease of explanation, as shown in the figure, an XYZ orthogonal coordinate system is defined in which a certain horizontal direction is the X-axis direction, a horizontal direction perpendicular to the X-axis is the Y-axis direction, and a vertical direction perpendicular to both is the Z-axis direction. The X-axis direction is sometimes called the left-right direction, the Y-axis direction is called the front-back direction, and the Z-axis direction is called the up-down direction. These directional notations do not limit the position of the furnace lid cleaning device 100, and the furnace lid cleaning device 100 can be used in any position.

The furnace lid cleaning device 100 is a cleaning device for removing dust, tar, and other deposits that have adhered to the furnace lid 80, which opens and closes the opening of the carbonization chamber of a coke oven (not shown). If dust, tar, and other deposits accumulate, the airtightness of the furnace lid 80 decreases when it is closed, which may result in gas leakage to the outside or the inflow of outside air. Therefore, it is desirable to clean the furnace lid 80 at the appropriate time.

As shown in Figures 1 and 3, the furnace lid 80 has an insulating part 82 made of bricks or the like, a lid body 84 that covers the periphery of the furnace opening, and a knife edge 86 that seals the outer periphery of the lid body 84. The lid body 84 is a wall-like part that extends left and right and up and down. The insulating part 82 protrudes in the front-rear direction from the left and right central area of the lid body 84. Vertical parts 84b are provided on both the left and right sides of the insulating part 82 of the lid body 84. A gas passage 84g is provided at the connection between the vertical part 84b of the lid body 84 and the insulating part 82. The deposits Dt mainly accumulate on the vertical part 84b of the lid body 84, the gas passage 84g, the tip 86b of the knife edge 86, and the insulating part 82.

As shown in FIG. 1, the furnace lid cleaning device 100 of this embodiment mainly includes a rotary cutter 40, a liquid spray unit 20, and a support mechanism 30. The rotary cutter 40 removes deposits from the insulating part 82 of the furnace lid 80, and is sometimes called a screw cutter. The rotary cutter 40 is supported by a drive mechanism (not shown) and moves along the outer periphery of the insulating part 82, removing deposits within its range of movement. A plurality of rotary cutters 40 may be provided corresponding to both side surfaces, the bottom surface, and the top surface of the insulating part 82. Note that since the amount of deposits on the top surface of the insulating part 82 is small, a scraper may be used instead of the rotary cutter 40 to remove the deposits.

As shown in FIG. 3, the liquid injection unit 20 injects high-pressure liquid Cw toward the area extending from the vertical portion 84b of the lid body 84, the gas passage 84g, and the tip 86b of the knife edge 86, and removes the deposits Dt. Hereinafter, the vertical portion 84b of the lid body 84, the gas passage 84g, and the tip 86b of the knife edge 86 are collectively referred to as the "object to be cleaned," and the part onto which the high-pressure liquid is injected is particularly referred to as the "part to be cleaned."

The high-pressure liquid Cw that is sprayed may be any suitable liquid for cleaning, and in this embodiment, it is high-pressure water Cw. The liquid spray unit 20 is sometimes called a high-pressure water spray rotary gun.

The high-pressure water path will be described with reference to FIG. 1. The high-pressure water is generated by pressurizing cleaning water stored in a water tank 60 using a high-pressure water pump 62, and is supplied to the liquid spray unit 20 through each high-pressure water pipe 66 via a valve stand 64 for switching high-pressure water. The high-pressure water pipe 66 may be, for example, a hose.

As shown in FIG. 2, the liquid injection unit 20 includes an injection nozzle 10, a hollow cylindrical casing 22 that surrounds a cylindrical chamber 22c, and a pipe connection part 26 that is provided on the upstream side of the casing 22 and to which a high-pressure water pipe 66 is connected. In FIG. 2, the casing 22 is shown in perspective. In the liquid injection unit 20, high-pressure water is injected into the chamber 22c from the pipe connection part 26. The injection nozzle 10 injects high-pressure water while rotating in the chamber 22c as shown by arrow B. The high-pressure water injected from the injection nozzle 10 passes through the center hole of the nozzle retainer 24 and is discharged to the outside as shown by arrow D. As the injection nozzle 10 rotates, the impact point of the injected high-pressure water also rotates as shown by arrow C.

As shown in FIG. 3, the liquid injection unit 20 is supported by a support mechanism 30 and moves up and down or left and right along the periphery of the insulating unit 82, removing deposits Dt within its range of movement. The liquid injection unit 20 may include a liquid injection unit that moves up and down along both side surfaces of the insulating unit 82, and a liquid injection unit that moves left and right along the top and bottom surfaces of the insulating unit 82. In the following explanation, a liquid injection unit that moves up and down will be described, but the same applies to a liquid injection unit that moves left and right.

As shown in FIG. 3, the support mechanism 30 supports a pair of left and right liquid ejection units 20. The support mechanism 30 has a base 30b that extends left and right on the front side of the heat insulating unit 82, and a pair of arms 30c that extend from both ends of the base 30b toward the lid body 84 so as to sandwich the heat insulating unit 82. The pair of liquid ejection units 20 are fixed to the pair of arms 30c.

See also FIG. 4. FIG. 4 is a side view showing the liquid injection unit 20 and the part to be cleaned 80b. As shown in this figure, the liquid injection unit 20 may inject the high-pressure water Cw in a slightly downwardly inclined position. In this case, the downward component force of the high-pressure water can push the floating deposits downward. The support mechanism 30 drives the liquid injection unit 20 in the up and down directions. The support mechanism 30 also drives the liquid injection unit 20 in the forward direction in which the liquid injection unit 20 advances toward the vertical part 84b of the lid main body 84, and in the backward direction in which the liquid injection unit 20 retreats. The support mechanism 30 supports the liquid injection unit 20 so that the distance Ld from the nozzle tip 10c of the injection nozzle 10 to the part to be cleaned 80b is kept within a predetermined range.

The details of the liquid injection unit 20 will be described with reference to Figures 5 and 6. Figure 5 is a side cross-sectional view showing the liquid injection unit 20. Figure 6 is a side cross-sectional view showing the nozzle retainer 24 and the nozzle tip 10c. The liquid injection unit 20 has a single injection nozzle 10. The liquid injection unit 20 also has a casing 22, a pipe connection part 26, and a nozzle retainer 24. The casing 22 is a hollow cylindrical member that surrounds a cylindrical chamber 22c, and houses the injection nozzle 10 in the chamber 22c. The pipe connection part 26 is connected to the upstream side of the casing 22 and is a part to which the high-pressure water pipe 66 is connected. The nozzle retainer 24 is an annular member provided on the downstream side of the chamber 22c. The nozzle retainer 24 has a central hole 24c that penetrates from the upstream side to the downstream side, and a recess 24d provided on the upstream side. The recess 24d has a mortar shape that houses the downstream side of the injection nozzle 10.

As shown in FIG. 5, the injection nozzle 10 is a hollow pipe-shaped member that is rotatably housed within the casing 22. The injection nozzle 10 has a downstream nozzle tip 10c, an upstream nozzle base 10d, and an intermediate portion 10b that connects the nozzle tip 10c and the nozzle tip 10c. A hollow portion 10e that penetrates from the upstream side to the downstream side is provided in the nozzle tip 10c, the nozzle base 10d, and the intermediate portion 10b.

A portion of the upstream side of the intermediate portion 10b of the injection nozzle 10 is rotatably guided by the peripheral wall 22f of the casing 22. The downstream nozzle tip portion 10c of the injection nozzle 10 is rotatably guided in the recess 24d of the nozzle retainer 24. The injection nozzle 10 rotates by the pressure of the high-pressure water around another axis Lb inclined at an angle θn to the axis La of the liquid injection portion 20. The high-pressure water flows from the upstream side to the downstream side through the hollow portion 10e of the injection nozzle 10 and is injected from the nozzle tip portion 10c.

In the liquid injection section 20, a passage 22e through which high-pressure water flows from the pipe connection section 26 into the chamber 22c is formed at a position offset from the axis La. With the passage 22e positioned in this way, the high-pressure water that flows into the chamber 22c rotates and forms a vortex. The rotation of the high-pressure water also rotates the injection nozzle 10. The injection nozzle 10 performs precession, rotating on its own axis with the rotation axis tilted and rotating, because the nozzle tip 10c is supported in the recess 24d of the nozzle retainer 24 and the upstream side is supported by the peripheral wall 22f of the casing 22. The precession of the injection nozzle 10 causes the injected high-speed water to rotate so that the landing point draws a circle.

Next, the tip inner diameter Dn of the nozzle tip 10c of the injection nozzle 10 will be described. According to the inventors' study, if the tip inner diameter Dn is too small, the amount of water sprayed will be small and the cleaning power will be reduced. On the other hand, if the tip inner diameter Dn is too large, the amount of water sprayed will be too large, the capacity of the high-pressure water pump 62 will be insufficient, the necessary water pressure will not be obtained, and the cleaning power will be reduced. For these reasons, in this embodiment, the tip inner diameter Dn of the nozzle tip 10c of the injection nozzle 10 is set in the range of 1 mm or more and 2 mm or less. It has been confirmed that a practical cleaning power can be obtained within this range.

Next, the inclination angle θn of the axis Lb of the injection nozzle 10 relative to the axis La of the liquid injection portion 20 will be described. According to the inventors' studies, if the inclination angle θn is too small, the water landing range will be narrowed, and the back side of the gas passage 84g and part of the knife edge 86 may not be sufficiently cleaned. Furthermore, if the inclination angle θn is too large, the rotation of the injection nozzle 10 will become unstable. For these reasons, in this embodiment, the inclination angle θn is set in the range of 10° to 20°. It has been confirmed that a practical cleaning power can be obtained within this range. For example, the inclination angle θn is 15°.

Next, the rotational speed of the injection nozzle 10 will be explained. According to the inventors' study, if the rotational speed of the injection nozzle 10 is less than 1000 rpm, the density of the water landing trajectory will be small, and the cleaning power will be reduced. Furthermore, if the rotational speed is low, the momentum of the injected high-pressure water in the rotational direction will decrease, and the ability to remove deposits will be reduced. For these reasons, in this embodiment, the shape of the casing 22 and the injection nozzle 10 is set so that the rotational speed of the injection nozzle 10 is 1000 rpm or more.

Next, we will explain the cleaning power when the tip inner diameter Dn is set to 1 mm or more and 2 mm or less, the inclination angle θn is set to 10° or more and 20° or less, and the rotation speed of the injection nozzle 10 is set to 1000 rpm or more, as described above. Figures 7 and 8 are graphs showing the relationship between the cleaning power Fp and the distance Ld from the tip of the injection nozzle 10 to the part to be cleaned 80b in this setting. Figure 7 shows the case where the tip inner diameter Dn is 1.5 mm, and Figure 8 shows the case where the tip inner diameter Dn is 1.05 mm. In these graphs, the horizontal axis shows the distance Ld, and the vertical axis shows the cleaning power Fp.

Figures 7 and 8 show the cleaning force Fr recommended for efficiently cleaning the furnace lid. The cleaning force Fr was determined by the inventors through experiments. It has been confirmed that the gas passage 84g and the knife edge 86 can be sufficiently cleaned if the cleaning force Fr is 2.0 kgf/mm2 or more. These graphs also show the cleaning force Fp when the high-pressure water pressure Pw is set to three levels within the practical range: 30 MPa, 40 MPa, and 50 MPa.

As shown in Figure 7, when the tip inner diameter Dn = 1.5 mm, a cleaning power of Fr or more can be achieved at each of the three water pressure levels when the distance Ld is 200 mm or less. Also, as shown in Figure 8, when the tip inner diameter Dn = 1.05 mm, a cleaning power of Fr or more can be achieved at two water pressure levels of 40 MPa and 50 MPa when the distance Ld is 200 mm or less. From these findings, it is preferable that the distance Ld from the tip of the injection nozzle 10 to the part to be cleaned 80b be 200 mm or less.

As shown in Figure 8, when the tip inner diameter Dn = 1.05 mm, when the distance Ld is 150 mm or less, a cleaning power equal to or greater than the recommended cleaning power Fr can be achieved at each of the three water pressure levels. Therefore, it is more preferable that the distance Ld from the tip of the injection nozzle 10 to the part to be cleaned 80b is 150 mm or less.

Although not shown in Figures 7 and 8, when the tip inner diameter Dn = 2.0 mm, the cleaning power is higher, and it has been confirmed that when the distance Ld is 200 mm or less, a cleaning power equal to or greater than the recommended cleaning power Fr is achieved at each of the three water pressure levels.

In addition, according to the inventors' research, it has been found that if the distance Ld is greater than 200 mm, the range over which the high-pressure water hits becomes excessively wide, increasing the proportion of the water that is wasted by exceeding the gas passage 84g and the knife edge 86, and the high-pressure water hits the bricks of the insulation section 82 directly, making the bricks more likely to crack. For this reason, it is preferable that the distance Ld be 200 mm or less.

The case where the distance Ld from the tip of the injection nozzle 10 to the part to be cleaned 80b is small will be explained. According to the inventors' studies, if the distance Ld is too small, the water landing range will be narrowed, and the back side of the gas passage 84g and part of the knife edge 86 will not be cleaned sufficiently. In particular, if the distance Ld is less than 100 mm, less than half of the gas passage 84g and the knife edge 86 can be cleaned. Therefore, it is preferable that the distance Ld is 100 mm or more.

The operation and effects of the furnace lid cleaning device 100 of this embodiment configured in this manner will be explained.

The furnace lid cleaning device 100 is equipped with a liquid injection unit 20 that injects cleaning liquid onto the part 80b of the coke oven lid 80 to be cleaned, and the liquid injection unit 20 has a single injection nozzle 10. The injection nozzle 10 has a tip inner diameter Dn in the range of 1 mm to 2 mm, and rotates by the pressure of the liquid around another axis inclined at an angle of 10° to 20° with respect to the axis of the liquid injection unit 20. The furnace lid cleaning device 100 is configured to keep the distance Ld from the tip of the injection nozzle 10 to the part 80b to be cleaned within the range of 100 mm to 200 mm.

With this configuration, the desired cleaning power can be achieved even if the distance Ld is increased to a range of 100 mm or more and 200 mm or less. Because the distance Ld is 100 mm or more, the water landing range is expanded, and most of the gas passage 84g and knife edge 86 can be effectively cleaned. Because the distance Ld is 200 mm or less, less high-pressure water is wasted by exceeding the gas passage 84g and knife edge 86, and there is more room for high-pressure water supply. In addition, the proportion of high-pressure water that directly hits the bricks of the insulation section 82 is reduced, preventing damage to the bricks. As a result, the coke oven lid 80 can be efficiently cleaned.

The furnace lid cleaning device 100 may be configured to keep the distance Ld from the tip of the injection nozzle 10 to the part to be cleaned 80b at 150 mm or less. In this case, the desired cleaning power can be achieved even when the water pressure of the high-pressure water is low, so a small-capacity pump can be used. In addition, the proportion of the high-pressure water that directly hits the bricks of the insulation part 82 can be reduced, preventing damage to the bricks. As a result, the furnace lid 80 of the coke oven can be efficiently cleaned.

The rotational speed of the spray nozzle 10 may be set to 1000 rpm or more. In this case, the density of the water impact trajectory will be higher than when set to a lower speed, improving cleaning power. In addition, the momentum of the sprayed high-pressure water in the rotational direction will increase, improving the ability to remove deposits.

[Second embodiment]
A second embodiment of the present invention will be described. The second embodiment of the present invention is a method for cleaning a furnace lid. This method is a cleaning method for cleaning a furnace lid 80 of a coke oven by spraying a cleaning liquid from a liquid spraying unit 20 onto a portion 80b of the furnace lid 80 to be cleaned. The liquid spraying unit 20 has a single spray nozzle 10, and the spray nozzle 10 has a tip inner diameter Dn in the range of 1 mm to 2 mm and rotates by the pressure of the liquid around another axis inclined at an angle of 10° to 20° with respect to the axis of the liquid spraying unit 20. The distance from the tip of the spray nozzle 10 to the portion 80b to be cleaned is set in a range in which the cleaning force is 2 kgf/mm2 or more depending on the tip inner diameter Dn and the pressure of the liquid supplied to the spray nozzle 10.

According to the second embodiment, the cleaning force is 2 kgf/mm2 or more, so the coke oven lid 80 can be efficiently cleaned.

[Third embodiment]
A third embodiment of the present invention will be described. The third embodiment of the present invention is also a furnace lid cleaning method. This method is a cleaning method for cleaning a furnace lid of a coke oven by spraying a cleaning liquid from a liquid spraying unit onto a part to be cleaned of a knife edge of the furnace lid. The liquid spraying unit has a single nozzle having an inner diameter of 1 mm to 2 mm and rotating by the pressure of the liquid while being tilted at an angle of 10° to 20° with respect to the axis of the liquid spraying unit. In this cleaning method, the spray nozzle is rotated at 1000 rpm or more, and cleaning is performed while keeping the distance from the tip of the spray nozzle to the part to be cleaned within a range of 100 mm to 200 mm.

According to the third embodiment, the desired cleaning power can be achieved even if the distance Ld is increased to a range of 100 mm or more and 200 mm or less. Since the distance Ld is 100 mm or more, the water landing range is expanded and most of the gas passage 84g and the knife edge 86 can be effectively cleaned. Since the distance Ld is 200 mm or less, the amount of high-pressure water that is wasted by exceeding the gas passage 84g and the knife edge 86 is reduced, and the supply of high-pressure water can be increased. In addition, the proportion of high-pressure water that directly hits the bricks of the insulation section 82 is reduced, preventing damage to the bricks. As a result, the coke oven lid 80 can be efficiently cleaned.

Above, examples of the embodiments of the present invention have been described in detail. All of the above-mentioned embodiments merely show specific examples of implementing the present invention. The contents of the embodiments do not limit the technical scope of the present invention, and many design changes such as changing, adding, and deleting components are possible within the scope of the idea of the invention defined in the claims. In the above-mentioned embodiments, the contents for which such design changes are possible are explained with notations such as "in the embodiment" and "in the embodiment", but this does not mean that design changes are not permitted for contents without such notations. In addition, hatching on the cross sections of the drawings does not limit the material of the objects to which the hatching is applied.

The following describes the modified examples. In the drawings and description of the modified examples, the same components and members as those in the embodiment are given the same reference numerals. Explanations that overlap with the embodiment will be omitted as appropriate, and the description will focus on the configurations that differ from the embodiment.

In the description of the embodiment, an example has been shown in which the support mechanism 30 advances and retreats the liquid ejection unit 20 in the front-to-rear direction relative to the vertical portion 84b, but the present invention is not limited to this. It is not essential that the support mechanism advances and retreats the liquid ejection unit in the front-to-rear direction, and the support mechanism may not have a mechanism for driving it in the front-to-rear direction.

In the description of the embodiment, the high-pressure liquid is high-pressure water, but the present invention is not limited to this. The high-pressure liquid may be a cleaning liquid to which a cleaning agent has been added, or may contain a solvent other than water.

The above-mentioned modified example provides the same effects and advantages as the above-mentioned embodiment.

Any combination of the above-described embodiments and modifications is also useful as an embodiment of the present invention. The new embodiment resulting from the combination has the combined effects of each of the combined embodiments and modifications.

10: Injection nozzle, 10c: Nozzle tip, 10e: Hollow section, 20: Liquid injection section, 22: Casing, 24: Nozzle retainer, 30: Support mechanism, 40: Rotary cutter, 80: Furnace lid, 80b: Section to be cleaned, 82: Insulation section, 84: Lid body, 86: Knife edge, 100: Furnace lid cleaning device.

Claims (5)

A method for installing a furnace cover cleaning device for cleaning an area of a furnace cover of a coke oven, the area including a heat insulating part formed of bricks, a cover body covering the periphery of a furnace opening, and a knife edge sealing the periphery of the cover body, the area being cleaned being from a gas passage to a tip of the knife edge, comprising:
The furnace roof cleaning device includes a liquid spraying unit that sprays a cleaning liquid onto a portion of a furnace roof of a coke oven to be cleaned , and a support mechanism that supports the liquid spraying unit.
The liquid ejection unit has a single ejection nozzle,
the injection nozzle has an inner diameter of a tip end in the range of 1 mm to 2 mm, and rotates by the pressure of the liquid around another axis inclined at an angle of 10° to 20° with respect to the axis of the liquid injection part;
A method for installing a furnace lid cleaning device, characterized in that the liquid injection part is fixed to the support mechanism so as to maintain the distance from the tip of the injection nozzle to the part to be cleaned within a range of 100 mm or more and 200 mm or less. 2. The method for installing a furnace lid cleaning device according to claim 1, characterized in that the distance from the tip of the injection nozzle to the part to be cleaned is kept at 150 mm or less. 3. The method for installing a furnace cover cleaning device according to claim 1, wherein the rotational speed of the injection nozzle is set to 1000 rpm or more. 3. The method for installing a furnace lid cleaning apparatus according to claim 1, wherein the liquid spraying unit is installed in a position inclined downward. The support mechanism has a base portion extending left and right on a front side of the heat insulating portion, and a pair of arms extending from both ends of the base portion toward the lid main body so as to sandwich the heat insulating portion therebetween,
3. The method for installing a furnace lid cleaning apparatus according to claim 1, wherein the liquid injection units are fixed to the pair of arm units, respectively.

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