KR20200083229A - Apparatus and method for cleaning furnace cover - Google Patents

Abstract

Provided are an apparatus and a method for cleaning a furnace cover, which are capable of efficiently cleaning the furnace cover of a coke oven. An apparatus 100 for cleaning a furnace cover includes a liquid spraying unit 20 for spraying a cleaning liquid to a portion to be cleaned of a furnace cover 80 of the coke oven. The liquid spraying unit 20 has a single spraying nozzle. A front end portion of the spraying nozzle is in the range of 1 mm to 2 mm. The spraying nozzle rotates about another axis inclined in a range of 10° to 20° with respect to an axis of the liquid spraying unit 20. The apparatus 100 for cleaning the furnace cover is configured such that a distance from the front end portion of the spraying nozzle to the portion to be cleaned is maintained in the range of 100 mm to 200 mm.

Description

Cleaning device of the road cover, the cleaning method of the road cover{APPARATUS AND METHOD FOR CLEANING FURNACE COVER}

This application claims priority based on Japanese Patent Application No. 2018-246868 filed on December 28, 2018. The entire contents of the application are incorporated herein by reference.

The present invention relates to a furnace cover cleaning apparatus and a method for cleaning a furnace cover.

A technique for cleaning a coke oven furnace cover is known. In the patent document 1, this applicant discloses the furnace cover cleaning apparatus provided with the nozzle unit which injects high pressure water. The furnace cover cleaning apparatus is provided with a nozzle unit including a rotor having high pressure water injected at one end and an outlet at the other end, and a rotor having a tubular nozzle accommodated in the chamber, and the rotor rotates magnetically in the chamber. Then, high-pressure water is injected from a tubular nozzle. With this configuration, the starting point of the high-pressure water injected from the tubular nozzle rotates in an annular shape.

Patent Document 1: Japanese Patent Application Publication No. 2014-234466

As used in coke oven, deposits such as tar and pitch are deposited on the furnace cover that closes the opening. When the deposits are excessively deposited, the airtightness between them is reduced between the furnace cover and the opening. For this reason, it is preferable to clean the furnace cover in a timely manner, especially around the knife edge, to remove the deposits.

However, while cleaning the furnace cover, there is a request to shorten the cleaning time of the furnace cover by efficiently cleaning the furnace cover, since the furnace cover cannot be used.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a furnace cover cleaning apparatus capable of efficiently cleaning a furnace cover of a coke oven.

In order to solve the above-mentioned problems, the furnace cover cleaning apparatus of one aspect of the present invention includes a liquid injection part that injects cleaning liquid into the portion to be cleaned of the furnace cover of the coke oven. The liquid injection portion has a single injection nozzle. The spray nozzle rotates by the pressure of the liquid around another axis inclined in the range of 10° or more and 20° or less with respect to the axis of the liquid injection section, and the inner diameter of the tip is 1 mm or more and 2 mm or less. , It is configured to maintain the distance from the tip of the injection nozzle to the target to be cleaned within a range of 100 mm or more and 200 mm or less.

However, it is also effective as an aspect of the present invention that any combination of the above-described components and the components and expressions of the present invention are replaced with each other between a method and a system.

According to the present invention, one object of the present invention is to provide a furnace cover cleaning apparatus capable of efficiently cleaning a furnace cover of a coke oven.

1 is a schematic view schematically showing an example of a furnace cover cleaning apparatus according to a first embodiment.
FIG. 2 is a perspective view showing a liquid injection part of the furnace cover cleaning apparatus of FIG. 1.
3 is a view showing a cross section of the liquid injection portion and the furnace cover of the furnace cover cleaning apparatus of FIG.
FIG. 4 is a side view schematically showing the liquid injection portion and the target portion of the furnace cover cleaning apparatus of FIG. 1.
5 is a side cross-sectional view showing a liquid injection portion of the furnace cover cleaning apparatus of FIG. 1.
6 is a side cross-sectional view showing a nozzle retainer and a nozzle tip of the furnace cover cleaning apparatus of FIG. 1.
7 is a graph showing the relationship between the cleaning force and the distance from the nozzle to be cleaned in the nozzle cover cleaning apparatus of FIG.
FIG. 8 is another graph showing the relationship between the distance from the injection nozzle of the furnace cover cleaning apparatus of FIG. 1 to the target to be cleaned and the cleaning power.

The present inventors have studied the efficiency of cleaning the furnace cover with respect to the furnace cover cleaning device, and have a certain amount of power (hereinafter referred to as "cleaning force") per unit area that the cleaning water imparts to the target government. By doing so, it was found that the furnace cover can be cleaned efficiently. The embodiments described below were created to increase the cleaning power based on the results of this study. The detailed configuration of the embodiment will be described below.

Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments. In the embodiments and the modified examples, the same or equivalent components and members are denoted by the same reference numerals, and overlapping descriptions as appropriate are omitted. In addition, the dimensions of the members in each drawing are enlarged and reduced as appropriate to facilitate understanding. In addition, in each figure, a part of the member which is not important in describing embodiment is abbreviate|omitted and displayed.

In addition, although terms including ordinal numbers such as first and second are used to describe various components, this term is used only for the purpose of distinguishing one component from other components, and is constructed by this term. The elements are not limited.

[First Embodiment]

Hereinafter, the configuration of the furnace cover cleaning apparatus 100 according to the first embodiment will be described with reference to FIGS. 1 to 8. 1 is a schematic view schematically showing a state in which the furnace cover 80 is cleaned using the furnace cover cleaning device 100. 2 is a perspective view showing the liquid injection unit 20 of the furnace cover cleaning apparatus 100. 3 is a view showing a horizontal cross-section of the liquid injection unit 20 and the furnace cover 80 of the furnace cover cleaning apparatus 100.

For convenience of description, as shown in the figure, an XYZ rectangular coordinate system is defined in which the horizontal direction is the X-axis direction, the horizontal direction orthogonal to the X-axis is the Y-axis direction, and the vertical direction orthogonal to the both is the Z-axis direction. The X-axis direction may be referred to as a left-right direction, the Y-axis direction may be referred to as a front-rear direction, and the Z-axis direction may be referred to as a vertical direction. Marking in this direction does not limit the posture of the furnace cover cleaning device 100, and the furnace cover cleaning device 100 may be used in any posture.

The furnace cover cleaning device 100 is a cleaning device for removing deposits such as dust and tar attached to the furnace cover 80 that opens and closes an opening of a carbonization chamber of a coke oven (not shown). When dust or tar is deposited, the airtightness when the furnace cover 80 is closed is lowered, and there is a fear that gas leakage to the outside or inflow of outside air may occur. Therefore, it is preferable that the furnace cover 80 is cleaned in a timely manner.

1 and 3, the furnace cover 80 includes an insulating portion 82 formed of a brick or the like, a cover body 84 covering the periphery of the furnace opening, and an outer circumference of the cover body 84. It has a sealing knife edge (86). The cover body 84 is a wall-shaped portion extending horizontally and vertically. The heat insulation portion 82 protrudes in the front-rear direction from the left and right center regions of the cover body 84. Vertical portions 84b are provided on both right and left sides of the heat insulating portion 82 of the cover body 84. A gas passage 84g is provided at a connection portion between the vertical portion 84b of the cover body 84 and the heat insulating portion 82. The attachment Dt is mainly deposited on the vertical portion 84b of the cover body 84, the gas path 84g, the tip 86b of the knife edge 86, and the heat insulating portion 82.

As shown in Fig. 1, the furnace cover cleaning apparatus 100 of this embodiment mainly includes a rotary cutter 40, a liquid injection portion 20, and a support mechanism 30. The rotary cutter 40 removes the attachment of the heat insulation portion 82 of the furnace cover 80, and may be referred to as a screw cutter. The rotary cutter 40 is supported by a driving mechanism (not shown), and moves along the outer periphery of the heat insulation portion 82 to remove attachments in the moving range. The rotary cutter 40 may be provided in plurality in correspondence with both side surfaces, the lower surface, and the upper surface of the heat insulating portion 82. However, since the upper surface of the heat insulation portion 82 has a small amount of deposits, the attachments may be removed by a scraper instead of the rotary cutter 40.

As shown in Fig. 3, the liquid ejection section 20 has high pressure from the vertical portion 84b of the lid body 84 to the region extending from the gas path 84g to the tip 86b of the knife edge 86. The liquid (Cw) is sprayed to remove their deposits (Dt). Hereinafter, when the vertical portion 84b of the lid body 84, the gas path 84g, and the tip end 86b of the knife edge 86 are collectively referred to as a "cleaning target", in particular, a high pressure liquid is injected. The part is called "the government of taxation"

The high-pressure liquid (Cw) to be injected may be any suitable for washing, and in this embodiment, it is high-pressure water (Cw). However, the liquid injection unit 20 may be referred to as a high-pressure water-soaping gun.

Referring to Fig. 1, the path of the high pressure water will be described. The high pressure water pressurizes the cleaning water stored in the water tank 60 by the high pressure water pump 62, and interposes the high pressure water conversion valve stand 64, and liquids through each high pressure water pipe 66. It is supplied to the injection unit 20. The high pressure water pipe 66 may be, for example, a hose.

As shown in FIG. 2, the liquid injection section 20 is provided on the upstream side of the injection nozzle 10, the hollow cylindrical casing 22 surrounding the cylindrical chamber 22c, and the casing 22. It is provided and includes a pipe connection 26 to which the high pressure water pipe 66 is connected. In Fig. 2, the casing 22 is shown by perspective. High pressure water is injected into the chamber 22c from the pipe connecting portion 26 in the liquid injection portion 20. The injection nozzle 10 injects high-pressure water while rotating as indicated by an arrow B in the chamber 22c. The high pressure water sprayed from the spray 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 high pressure water to be injected also rotates the starting point as indicated by arrow C.

As shown in FIG. 3, the liquid injection portion 20 is supported by the support mechanism 30 and moves up and down or left and right along the periphery of the heat insulation portion 82 to remove the attachment Dt in the moving range. do. The liquid injection unit 20 may include a liquid injection unit that moves vertically along both sides of the heat insulation unit 82 and a liquid injection unit that moves horizontally along the upper and lower surfaces of the thermal insulation unit 82. In the following description, the liquid injection portion moving up and down is described, but the liquid injection portion moving left and right is also the same.

As shown in FIG. 3, the support mechanism 30 supports a pair of left and right liquid injection portions 20. The support mechanism 30, as long as it extends toward the lid body 84 so as to sandwich the heat insulating portion 82 from both ends of the base 30b and the base 30b extending from side to side on the front side of the heat insulating portion 82 It has a pair of arm portions 30c. The pair of liquid injection portions 20 are fixed to the pair of arm portions 30c.

See also FIG. 4. 4 is a side view schematically showing the liquid ejecting portion 20 and the target portion 80b. As shown in this figure, the liquid injection unit 20 may spray high-pressure water Cw in a slightly downwardly inclined posture. In this case, the floating attachment can be flowed downward by the downward pressure of the high pressure water. The support mechanism 30 drives the liquid injection unit 20 in the vertical direction. In addition, the support mechanism 30 drives the liquid injection portion 20 in the forward direction in which the liquid injection portion 20 advances toward the vertical portion 84b of the lid body 84 and in the backward direction in which it is retracted. The support mechanism 30 supports the liquid injection unit 20 such that the distance Ld from the nozzle tip 10c of the injection nozzle 10 to the portion to be cleaned 80b remains within a predetermined range.

5 and 6, details of the liquid injection unit 20 will be described. 5 is a side cross-sectional view showing the liquid injection unit 20. 6 is a side cross-sectional view showing the nozzle retainer 24 and the nozzle tip portion 10c. The liquid injection unit 20 has a single injection nozzle 10. In addition, the liquid injection portion 20 has a casing 22, a pipe connecting portion 26, and a nozzle retainer 24. The casing 22 is a hollow cylindrical member surrounding the cylindrical chamber 22c, and accommodates the injection nozzle 10 in the chamber 22c. The pipe connection part 26 is continuously installed on 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 penetrating from the upstream side to the downstream side, and a concave portion 24d provided on the upstream side. The concave portion 24d has a bowl shape that accommodates the downstream side of the injection nozzle 10.

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

A part of the upstream side of the intermediate portion 10b of the injection nozzle 10 is rotatably guided by a peripheral wall 22f of the casing 22. The nozzle tip portion 10c on the downstream side of the injection nozzle 10 is rotatably guided to the concave portion 24d of the nozzle retainer 24. The injection nozzle 10 is rotated by the pressure of high-pressure water around another axis Lb inclined at an angle θn with respect to the axis La of the liquid injection unit 20. The high pressure water flows from the upstream side to the downstream side of the hollow portion 10e of the injection nozzle 10, and is injected from the nozzle tip portion 10c.

The liquid injection section 20 is formed at a position where the passage 22e through which the high-pressure water flows into the chamber 22c from the pipe connection section 26 is deviated from the axis La. As the passage 22e is disposed in this way, the high-pressure water flowing into the chamber 22c rotates to form a vortex. As the high pressure water rotates, the injection nozzle 10 also rotates. In the spray nozzle 10, the nozzle tip portion 10c is supported by the concave portion 24d of the nozzle retainer 24, and the upstream side is supported by the circumferential wall 22f of the casing 22, so that the rotating shaft rotates inclinedly. The precession movement rotates to the state. As the spray nozzle 10 precesses, the sprayed high-speed water rotates so that the starting point draws a circle.

Next, the inner diameter Dn of the distal end of the nozzle distal end 10c of the injection nozzle 10 will be described. According to the studies of the present inventors, if the tip inner diameter (Dn) is excessively small, the number of jets is reduced and the cleaning power is reduced. In addition, if the tip inner diameter (Dn) is excessively large, the amount of water sprayed becomes too large, and the capacity of the high-pressure water pump (62) is insufficient, so that the required water pressure cannot be obtained, and the cleaning power decreases. From these, in this embodiment, the inner diameter Dn of the tip end of the nozzle tip 10c of the injection nozzle 10 is set in a 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 with respect to the axis La of the liquid injection portion 20 of the axis Lb of the injection nozzle 10 will be described. According to the studies of the present inventors, when the inclination angle θn is excessively small, the starting range is narrowed, and the inside of the gas path 84g or a portion of the knife edge 86 may not be sufficiently cleaned. Also, if the inclination angle θn is excessively large, the rotation of the injection nozzle 10 becomes unstable. From these, in this embodiment, the inclination angle θn is set in a range of 10° or more and 20° or less. 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 described. According to the studies of the present inventors, if the rotational speed of the injection nozzle 10 is less than 1000 rpm, the density of the starting trajectory becomes small, and the cleaning power decreases. In addition, when the rotational speed is low, the momentum in the rotational direction of the injected high pressure water decreases, and the ability to peel off the attachment decreases. From these, 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, as described above, the inner diameter (Dn) = 1mm or more and 2mm or less, the inclination angle (θn) = 10° or more and 20° or less, cleaning power when the rotational speed of the spray nozzle 10 is set to 1000 rpm or more Explain. 7 and 8 are graphs showing the relationship between the distance Ld from the tip of the injection nozzle 10 to the portion to be cleaned 80b and the cleaning force Fp in this setting. Fig. 7 shows a case where the inner diameter of the tip (Dn) = 1.5 mm, and Fig. 8 shows a case where the inner diameter of the tip (Dn) = 1.05 mm. In these graphs, the distance Ld is shown on the horizontal axis, and the cleaning power Fp is shown on the vertical axis.

In FIGS. 7 and 8, the recommended cleaning power Fr is displayed to efficiently clean the furnace cover. The cleaning power Fr is obtained by experiments by the inventors. It has been confirmed that if the cleaning power (Fr) = 2.0 kgf/square millimeter or more, the gas furnace 84 g and the knife edge 86 can be sufficiently cleaned. In addition, these graphs show the cleaning power Fp when the water pressure Pw of the high-pressure water is set to three steps of 30 MPa, 40 MPa, and 50 MPa in the practical range.

As shown in Fig. 7, when the inner diameter (Dn) of the tip is 1.5 mm, when the distance Ld is 200 mm or less, it is possible to realize at least the cleaning power Fr recommended for the water pressure in each of the three stages. In addition, as shown in Fig. 8, when the inner diameter (Dn) of the tip is 1.05 mm, when the distance Ld is 200 mm or less, it is possible to realize more than the recommended cleaning power Fr in two stages of water pressure of 40 MPa and 50 MPa. . From these, the distance Ld from the tip of the injection nozzle 10 to the target portion 80b is preferably 200 mm or less.

As shown in Fig. 8, when the inner diameter (Dn) of the tip portion = 1.05 mm, when the distance Ld is 150 mm or less, it is possible to realize the cleaning power Fr or higher recommended for the water pressure in each of the three stages. Therefore, the distance Ld from the tip of the injection nozzle 10 to the target portion 80b is more preferably 150 mm or less.

Although not shown in FIGS. 7 and 8, when the tip inner diameter (Dn) = 2.0 mm, the cleaning power becomes higher, and when the distance (Ld) is 200 mm or less, the cleaning power (Fr) or higher recommended for each water pressure in each of the three steps is It is confirmed to be realized.

However, according to the studies of the present inventors, if the distance Ld is greater than 200 mm, the range of high pressure water is excessively widened, and the ratio to be wasted beyond the gas furnace 84 g or the knife edge 86 increases. , It has been found that the high-pressure water directly hits the brick of the heat insulating portion 82, and the brick is likely to crack. From this point, the distance Ld is preferably 200 mm or less.

The case where the distance Ld from the tip of the injection nozzle 10 to the target portion 80b is small will be described. According to the studies of the present inventors, it has been found that when the distance Ld is excessively small, the starting range is narrowed, and the inside of the gas path 84g or a portion of the knife edge 86 is not sufficiently cleaned. Particularly, when the distance Ld is smaller than 100 mm, it can be cleaned by less than half of the gas furnace 84 g or the knife edge 86. Therefore, the distance Ld is preferably 100 mm or more.

The operation and effect of the furnace cover cleaning apparatus 100 of this embodiment configured as described above will be described.

The furnace cover cleaning apparatus 100 is provided with a liquid injection unit 20 for spraying cleaning liquid to the portion 80b of the furnace cover 80 of the coke oven, and the liquid injection unit 20 is a single It has an injection nozzle (10). The injection nozzle 10, the inner diameter (Dn) of the tip is in the range of 1mm or more and 2mm or less, and the pressure of the liquid around the other axis inclined in the range of 10° or more and 20° or less with respect to the axis of the liquid injection part (20). Rotates. The furnace cover cleaning apparatus 100 is configured to maintain the distance Ld from the tip of the injection nozzle 10 to the target portion 80b within a range of 100 mm or more and 200 mm or less.

According to this configuration, even if the distance Ld is increased to a range of 100 mm or more and 200 mm or less, desired cleaning power can be realized. Since the distance Ld is 100 mm or more, it is possible to effectively clean most of the gas path 84g or the knife edge 86 by expanding the starting range. Since the distance Ld is 200 mm or less, the high pressure water that is wasted over the gas furnace 84 g or the knife edge 86 decreases, thereby increasing the margin of high pressure water supply. In addition, it is possible to prevent the damage of the brick by reducing the proportion of the high pressure water that directly fits the brick of the heat insulation portion 82. As a result, the furnace cover 80 of the coke oven can be cleaned efficiently.

The furnace cover cleaning apparatus 100 may be configured to maintain a distance Ld from the tip of the injection nozzle 10 to the portion to be cleaned 80b to 150 mm or less. In this case, the desired cleaning power can be realized even when the water pressure of the high-pressure water is low, so that a small-capacity pump can be used. In addition, it is possible to prevent the damage of the brick by reducing the proportion of the high pressure water that directly fits the brick of the heat insulation portion 82. As a result, the furnace cover 80 of the coke oven can be cleaned efficiently.

The rotational speed of the injection nozzle 10 may be set to 1000 rpm or more. In this case, compared with the case of setting at a low speed, the density of the starting trajectory becomes higher, and the cleaning power is improved. In addition, the momentum in the rotational direction of the injected high pressure water increases, and the ability to peel off the attachment is improved.

[Second Embodiment]

The second embodiment of the present invention will be described. The second embodiment of the present invention is a furnace cover cleaning method. This method is a cleaning method of cleaning the furnace cover 80 by spraying the cleaning liquid from the liquid injection section 20 to the portion to be cleaned 80b of the furnace cover 80 of the coke oven. The liquid ejection section 20 has a single ejection nozzle 10, and the ejection nozzle 10 has a tip end diameter Dn in a range of 1 mm or more and 2 mm or less, with respect to the axis of the liquid ejection section 20 It is rotated by the pressure of the liquid around another axis inclined in the range of 10° or more and 20° or less. The distance from the tip of the spray nozzle 10 to the target portion 80b is set to a range in which the cleaning power is 2 kgf/square millimeter or more, depending on the inner diameter of the tip (Dn) and the pressure of the liquid supplied to the spray nozzle 10. .

According to the second embodiment, since the cleaning power is 2 kgf/square millimeter or more, the furnace cover 80 of the coke oven can be efficiently cleaned.

[Third Embodiment]

The third embodiment of the present invention will be described. The third embodiment of the present invention is also a furnace cover cleaning method. This method is a cleaning method in which a cleaning liquid is sprayed from a liquid injection part to a portion to be cleaned of a knife edge of a furnace cover of a coke oven to clean the furnace cover. The liquid injection unit is a nozzle having an inner diameter in the range of 1 mm or more and 2 mm or less, and has a single nozzle that rotates by the pressure of the liquid in an inclined state in a range of 10° or more and 20° or less with respect to the axis of the liquid injection unit. In this cleaning method, the spray nozzle is rotated at 1000 rpm or more, and the distance from the tip of the spray nozzle to the target portion is cleaned while maintaining a range of 100 mm or more and 200 mm or less.

According to the third embodiment, even if the distance Ld is increased to a range of 100 mm or more and 200 mm or less, desired cleaning power can be realized. Since the distance Ld is 100 mm or more, it is possible to effectively clean most of the gas path 84g or the knife edge 86 by expanding the starting range. Since the distance Ld is 200 mm or less, the high pressure water that is wasted over the gas furnace 84 g or the knife edge 86 decreases, thereby increasing the margin of high pressure water supply. In addition, it is possible to prevent the damage of the brick by reducing the proportion of the high pressure water that directly fits the brick of the heat insulation portion 82. As a result, the furnace cover 80 of the coke oven can be cleaned efficiently.

In the above, the example of embodiment of this invention was demonstrated in detail. All of the above-described embodiments merely show specific examples in practicing the present invention. The contents of the embodiments are not intended to limit the technical scope of the present invention, and in the range that does not depart from the spirit of the invention defined in the claims, many design changes such as changes, additions, and deletions of components are possible. In the above-described embodiment, the contents capable of such a design change are described with the notation of "in the embodiment", "in the embodiment", etc. no. In addition, hatching put in the cross section of the drawing does not limit the material of the object to which hatching is put.

Hereinafter, a modified example will be described. In the drawings and description of the modified examples, the same reference numerals are assigned to the same or equivalent components and members as those in the embodiment. Descriptions overlapping with the embodiments will be appropriately omitted, and configurations different from the embodiments will be mainly described.

In the description of the embodiment, although the support mechanism 30 has shown an example in which the liquid ejection portion 20 advances and retreats in the longitudinal direction with respect to the vertical portion 84b, the present invention is not limited to this. It is not essential for the support mechanism to advance or retreat the liquid ejection portion in the front-rear direction, and the support mechanism may not have a mechanism for driving in the front-rear direction.

In the description of the embodiment, an example is shown in which the high pressure liquid is high pressure water, but the present invention is not limited to this. The high-pressure liquid may be a washing liquid to which a washing agent is added, or may contain a solvent different from water.

The above-described modification exhibits the same actions and effects as the above-described embodiment.

Any combination of the above-described embodiments and modifications are also useful as embodiments of the present invention. The new embodiment generated by the combination has the effect of each of the combined embodiments and modified examples.

10··Spray nozzle
10c...Nozzle tip
10e...
20··Liquid injection
22··Casing
24·Nozzle retainer
30··Supporting Mechanism
40··Rotating cutter
80...
80b··Pise Government
82·Insulation
84... cover body
86·Knife Edge
100··No cover cleaning device

Claims (5)

It has a liquid injection unit for spraying the cleaning liquid to the portion to be cleaned of the furnace cover of the coke oven,
The liquid injection unit, has a single injection nozzle,
The injection nozzle, the inner diameter of the tip portion is in the range of 1mm or more and 2mm or less, rotates by the pressure of the liquid around another axis inclined in the range of 10° or more and 20° or less with respect to the axis of the liquid injection part,
The furnace cover cleaning device is configured to maintain a distance from the tip of the spray nozzle to the target portion within a range of 100 mm or more and 200 mm or less. According to claim 1,
And a cleaning device for cleaning the lid of the spray nozzle, characterized in that it is configured to maintain a distance of 150 mm or less from the tip of the spray nozzle to the target portion. The method according to claim 1 or 2,
The nozzle cover cleaning device, characterized in that the rotational speed of the injection nozzle is set to 1000 rpm or more. As a cleaning method for cleaning the furnace cover by spraying the cleaning liquid from the liquid injection portion to the portion to be cleaned of the furnace cover of the coke oven,
The liquid injection portion, having a single injection nozzle, the injection nozzle, the inner diameter of the tip portion is in the range of 1mm or more and 2mm or less, around the other axis inclined in the range of 10° or more and 20° or less with respect to the axis of the liquid injection part Rotated by the pressure of the liquid,
The distance from the tip of the spray nozzle to the to-be-cleaned part is set to a range in which the cleaning power is set to a range of 2 kgf/square millimeter or more according to the inner diameter of the tip and the pressure of the liquid supplied to the spray nozzle. Cleaning method. As a cleaning method for cleaning the furnace cover by spraying the cleaning liquid from the liquid injection portion to the portion to be cleaned of the furnace cover of the coke oven,
The liquid injection portion, having a single injection nozzle, the injection nozzle, the inner diameter of the tip portion is in the range of 1mm or more and 2mm or less, around the other axis inclined in the range of 10° or more and 20° or less with respect to the axis of the liquid injection part Rotated by the pressure of the liquid,
This cleaning method,
The injection nozzle is rotated to 1000 rpm or more,
A cleaning method for a furnace cover, characterized in that cleaning is performed while maintaining a distance from the tip of the spray nozzle to the to-be-cleaned part within a range of 100 mm or more and 200 mm or less.

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