CN111423892A - Furnace cover cleaning device and furnace cover cleaning method - Google Patents

Abstract

The invention provides a furnace cover cleaning device and a furnace cover cleaning method capable of efficiently cleaning a furnace cover of a coke oven. The furnace lid cleaning device (100) is provided with a liquid ejecting part (20) for ejecting cleaning liquid to a part to be cleaned of a furnace lid (80) of a coke furnace, and the liquid ejecting part (20) is provided with a single nozzle. The inner diameter of the tip of the nozzle is in the range of 1mm to 2mm, and the nozzle is rotated by the pressure of the liquid around another axis that is inclined in the range of 10 DEG to 20 DEG with respect to the axis of the liquid ejecting section (20). The furnace cover cleaning device (100) is configured to keep the distance from the front end of the nozzle to the cleaned part within the range of more than 100mm and less than 200 mm.

Description

Furnace cover cleaning device and furnace cover cleaning method

The present application claims priority based on japanese patent application No. 2018-246868, applied on 12/28/2018. The entire contents of this Japanese application are incorporated by reference into this specification.

Technical Field

The invention relates to a furnace cover cleaning device and a furnace cover cleaning method.

Background

A technique for cleaning the cover of a coke oven is known. The applicant of the present invention discloses a furnace lid cleaning device including a nozzle unit for spraying high-pressure water in patent document 1. The furnace lid cleaning device is provided with a nozzle unit, and the nozzle unit comprises: a chamber into which high-pressure water is injected from one end side and which is provided with an outlet on the other end side; and a rotor accommodated in the chamber and having a tubular nozzle, the rotor being rotated in the chamber by its own force and jetting high-pressure water from the tubular nozzle. With this configuration, the water landing point of the high-pressure water jetted from the tubular nozzle rotates in a circular ring shape.

Patent document 1: japanese patent laid-open No. 2014-234466

With the use of coke ovens, deposits such as tar and pitch accumulate on the oven lid that closes the opening of the coke oven. If the deposit is excessively deposited, it is sandwiched between the lid and the opening, and the airtightness therebetween is reduced. Therefore, it is preferable to clean the furnace lid, particularly the periphery of the knife-edge (knife-edge), in time to remove the deposits.

However, since the furnace lid cannot be used while the furnace lid is cleaned, it is required to efficiently clean the furnace lid and shorten the cleaning time of the furnace lid.

Disclosure of Invention

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

In order to solve the above problem, a furnace lid cleaning device according to one embodiment of the present invention includes a liquid ejecting portion that ejects a cleaning liquid to a portion to be cleaned of a furnace lid of a coke oven. The liquid ejecting section has a single nozzle. The inner diameter of the tip of the nozzle is in the range of 1mm to 2mm, and the nozzle is rotated by the pressure of the liquid around another axis inclined in the range of 10 DEG to 20 DEG with respect to the axis of the liquid ejecting portion, and the furnace cover cleaning device is configured to keep the distance from the tip of the nozzle to the portion to be cleaned in the range of 100mm to 200 mm.

Any combination of the above-described constituent elements, or substitution of the constituent elements or expressions of the present invention between a method, a system, and the like is also effective as an embodiment of the present invention.

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

Drawings

Fig. 1 is a schematic view schematically showing an example of the furnace cover cleaning apparatus according to embodiment 1.

Fig. 2 is a perspective view showing a liquid ejecting portion of the furnace cover cleaning apparatus of fig. 1.

Fig. 3 is a view showing a cross section of a liquid ejecting section and a furnace cover of the furnace cover cleaning apparatus of fig. 1.

Fig. 4 is a side view schematically showing a liquid ejecting portion and a portion to be cleaned of the furnace lid cleaning apparatus of fig. 1.

Fig. 5 is a side sectional view showing a liquid ejecting portion of the furnace cover cleaning apparatus of fig. 1.

Fig. 6 is a side sectional view showing a nozzle holder and a nozzle tip portion of the furnace cover cleaning apparatus of fig. 1.

Fig. 7 is a graph showing a relationship between a distance from a nozzle to a portion to be cleaned and a cleaning force in the furnace lid cleaning device of fig. 1.

Fig. 8 is another graph showing a relationship between a distance from a nozzle to a portion to be cleaned and a cleaning force in the furnace lid cleaning apparatus of fig. 1.

In the figure: 10-nozzle, 10 c-nozzle tip, 10 e-hollow, 20-liquid jet, 22-housing, 24-nozzle holder, 30-support mechanism, 40-rotary milling cutter, 80-lid, 80 b-cleaned part, 82-heat insulation, 84-lid body, 86-knife edge, 100-lid cleaning device.

Detailed Description

The present inventors have studied a furnace lid washing apparatus from the viewpoint of furnace lid washing efficiency, and have found that the furnace lid can be efficiently washed by increasing the impact force per unit area (hereinafter, referred to as "cleaning force") of washing water applied to the part to be washed to a certain degree or more. The embodiments described later were created based on the results of the study to improve the cleaning power. Hereinafter, the detailed structure of the embodiment will be described.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the embodiment and the modifications, the same or equivalent constituent elements and components are denoted by the same reference numerals, and overlapping description is appropriately omitted. In addition, the dimensions of the components in the drawings are appropriately enlarged or reduced for easy understanding. In the drawings, parts that are not essential to the description of the embodiments are omitted.

Further, although the terms including the numbers 1, 2, and the like are used to describe various components, the terms are only used for the purpose of distinguishing one component from another component, and the terms are not used to limit the components.

[ embodiment 1 ]

The following describes a structure of the furnace lid cleaning apparatus 100 according to embodiment 1 with reference to fig. 1 to 8. Fig. 1 is a schematic view schematically showing a state where the furnace cover 80 is cleaned by using the furnace cover cleaning apparatus 100. Fig. 2 is a perspective view showing the liquid ejecting section 20 of the furnace cover cleaning apparatus 100. Fig. 3 is a view showing a horizontal cross section of the liquid ejecting section 20 and the furnace cover 80 of the furnace cover cleaning apparatus 100.

For convenience of explanation, as shown in fig. 1, an XYZ rectangular coordinate system is defined in which one direction in the horizontal direction is an X-axis direction, the other direction in the horizontal direction orthogonal to the X-axis is a Y-axis direction, and the vertical direction orthogonal to the X-axis direction and the Y-axis direction is a Z-axis direction. The X-axis direction is sometimes referred to as the left-right direction, the Y-axis direction is sometimes referred to as the front-rear direction, and the Z-axis direction is sometimes referred to as the up-down direction. This concept of direction does not limit the posture of the furnace lid cleaning apparatus 100, and the furnace lid cleaning apparatus 100 can be used in any posture.

The oven cover cleaning apparatus 100 is a cleaning apparatus for removing deposits such as dust and tar adhering to the oven cover 80 for opening and closing an opening of a coking chamber of a coke oven, not shown. When dust, tar, or the like is accumulated, the airtightness after closing the furnace cover 80 is reduced, and there is a possibility that gas leaks to the outside or outside gas flows in. Therefore, it is preferable to clean the furnace cover 80 in time.

As shown in fig. 1 and 3, the furnace cover 80 includes: a heat insulating portion 82 made of bricks or the like; a cover body 84 covering the periphery of the furnace opening; and a knife edge 86 that seals the periphery of the cap body 84. The cover main body 84 is a wall-shaped portion extending in the right-left and up-down directions. The heat insulating portion 82 protrudes in the front-rear direction from a central region in the left-right direction of the cover main body 84. The cover main body 84 is provided with vertical portions 84b on both left and right sides of the heat insulating portion 82. An air passage 84g is provided at a connection portion between the vertical portion 84b of the cover main body 84 and the heat insulating portion 82. The deposit Dt is mainly deposited on the vertical portion 84b of the cover main body 84, the air passage 84g, the tip 86b of the blade edge 86, and the heat insulating portion 82.

As shown in fig. 1, the furnace lid cleaning apparatus 100 of the present embodiment mainly includes a rotary milling cutter 40, a liquid ejecting section 20, and a support mechanism 30. The rotary milling cutter 40 is also sometimes called a thread mill, and is used to remove deposits on the heat insulating portion 82 of the furnace cover 80. The rotary milling cutter 40 is supported by a drive mechanism, not shown, and moves along the outer periphery of the heat insulating portion 82 to remove the attached matter within the movement range. The rotary milling cutter 40 may be provided in plural numbers corresponding to both side surfaces, a lower surface, and an upper surface of the heat insulating portion 82. Further, since the amount of the deposit is small on the upper surface of the heat insulating portion 82, the deposit can be removed by a blade instead of the rotary milling cutter 40.

As shown in fig. 3, the liquid ejecting section 20 ejects the high-pressure liquid Cw toward a region including the vertical portion 84b of the cover main body 84 to the air passage 84g and the front end 86b of the blade edge 86, thereby removing the adhering matter Dt thereof. Hereinafter, the vertical portion 84b of the cap body 84, the air passage 84g, the tip 86b of the blade edge 86, and the like are collectively referred to as "cleaning targets", and particularly, a portion to which high-pressure liquid is ejected is referred to as "portion to be cleaned".

The high-pressure liquid Cw to be sprayed may be any liquid suitable for cleaning, and in the present embodiment, is high-pressure water Cw. The liquid ejecting unit 20 is also referred to as a high-pressure water jet rotary gun.

Next, referring to fig. 1, the path of the high-pressure water will be described. The high-pressure water pump 62 pressurizes the cleaning water stored in the water tank 60, and supplies the pressurized cleaning water to the liquid ejecting unit 20 through the high-pressure water switching valve seat 64 and the high-pressure water pipes 66. The high-pressure water pipe 66 may be a hose, for example.

As shown in fig. 2, the liquid ejecting section 20 includes a nozzle 10, a hollow cylindrical casing 22 surrounding a cylindrical chamber 22c, and a pipe coupling section 26 provided on the upstream side of the casing 22 and connected to a high-pressure water pipe 66. In fig. 2, the housing 22 is shown in perspective. In the liquid ejecting section 20, high-pressure water is injected from the pipe connecting section 26 into the chamber 22 c. The nozzle 10 sprays high-pressure water while rotating in the direction indicated by the arrow B in the chamber 22 c. The high-pressure water injected from the nozzle 10 is injected to the outside through the center hole of the nozzle holder 24 (see arrow D). By the rotation of the nozzle 10, the water landing point of the injected high-pressure water also rotates as indicated by arrow C.

As shown in fig. 3, the liquid ejecting section 20 is supported by the support mechanism 30, and removes the attached matter Dt within the movement range while moving up and down or left and right along the periphery of the heat insulating section 82. The liquid ejecting section 20 may include a liquid ejecting section that moves up and down along both side surfaces of the heat insulating section 82 and a liquid ejecting section that moves left and right along upper and lower surfaces of the heat insulating section 82. In the following description, the liquid ejecting unit that moves up and down will be described, but the liquid ejecting unit that moves left and right will also be the same.

As shown in fig. 3, the support mechanism 30 supports the pair of right and left liquid ejecting sections 20. The support mechanism 30 includes: a base portion 30b extending right and left on the front side of the heat insulating portion 82; and a pair of arm portions 30c extending from both ends of the base portion 30b toward the cover main body 84 such that the heat insulating portion 82 is sandwiched between the pair of wall portions 30 c. The pair of liquid ejecting portions 20 are fixed to the pair of arm portions 30 c.

Referring also to fig. 4, fig. 4 is a side view schematically showing the liquid ejecting section 20 and the part 80b to be cleaned, and as shown in the figure, the liquid ejecting section 20 can eject the high pressure water Cw. in a slightly downward inclined posture, and at this time, the floating attachments can be washed down by the downward component force of the high pressure water, the supporting mechanism 30 drives the liquid ejecting section 20 to move in the vertical direction, and the supporting mechanism 30 drives the liquid ejecting section 20 to extend toward the vertical section 84b (front) of the cover main body 84 or to retreat toward the rear, and the supporting mechanism 30 supports the liquid ejecting section 20 so that the distance L d from the nozzle tip 10c of the nozzle 10 to the part 80b to be cleaned is maintained within a predetermined range.

Referring to fig. 5 and 6, the detailed structure of the liquid ejecting section 20 will be described. Fig. 5 is a side sectional view showing the liquid ejecting section 20. Fig. 6 is a side sectional view showing the nozzle holder 24 and the nozzle tip portion 10 c. The liquid ejecting section 20 has a single nozzle 10. The liquid ejecting unit 20 further includes a housing 22, a pipe coupling portion 26, and a nozzle holder 24. The housing 22 is a hollow cylindrical member surrounding a cylindrical chamber 22c, and the nozzle 10 is accommodated in the chamber 22 c. The pipe connection portion 26 is provided on the upstream side of the casing 22 and is a portion to which the high-pressure water pipe 66 is connected. The nozzle holder 24 is an annular member provided on the downstream side of the chamber 22 c. The nozzle holder 24 has a center hole 24c penetrating 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 accommodates the downstream side of the nozzle 10.

As shown in fig. 5, the nozzle 10 is a hollow tubular member rotatably housed in the housing 22. The nozzle 10 has a downstream nozzle tip 10c, an upstream nozzle base 10d, and an intermediate portion 10b connecting the nozzle tip 10c and the nozzle base 10 d. A hollow portion 10e penetrating from the upstream side to the downstream side is provided in the nozzle tip portion 10c, the nozzle base end portion 10d, and the intermediate portion 10 b.

A part of the upstream side of the intermediate portion 10b of the nozzle 10 is rotatably guided by the peripheral wall 22f of the housing 22, and the nozzle tip portion 10c on the downstream side of the nozzle 10 is rotatably guided by the recessed portion 24d of the nozzle holder 24. the nozzle 10 is rotated about another axis L b inclined at an angle θ n with respect to the axis L a of the liquid ejecting portion 20 by the pressure of high-pressure water, and the high-pressure water flows from the upstream side to the downstream side in the hollow portion 10e of the nozzle 10 and is ejected from the nozzle tip portion 10 c.

In the liquid ejecting section 20, a passage 22e for allowing high-pressure water to flow from the pipe connecting section 26 into the chamber 22c is formed at a position offset from the axis L a. by disposing the passage 22e in this manner, the high-pressure water flowing into the chamber 22c is rotated to form a vortex, and by rotating the high-pressure water, the nozzle 10 is also rotated, and since the nozzle tip 10c of the nozzle 10 is supported by the recess 24d of the nozzle holder 24 and the upstream side of the nozzle 10 is supported by the peripheral wall 22f of the housing 22, the nozzle 10 performs a precession motion in which the rotation axis is inclined and rotates while rotating, and by performing the precession motion of the nozzle 10, the impact point of the high-speed water ejected is rotated so as to draw a circle.

Next, the tip end inner diameter Dn of the nozzle tip end 10c of the nozzle 10 will be described. According to the study of the present inventors, when the inner diameter Dn of the tip portion is too small, the amount of water to be sprayed is reduced, which leads to a reduction in cleaning power. If the tip end inner diameter Dn is too large, the amount of water to be injected becomes too large, the capacity of the high-pressure water pump 62 becomes insufficient, and the required water pressure cannot be obtained, thereby reducing the cleaning force. Accordingly, in the present embodiment, the tip end portion inner diameter Dn of the nozzle tip portion 10c of the nozzle 10 is set within a range of 1mm to 2 mm. It has been confirmed that a practical cleaning force can be obtained by setting the cleaning force within this range.

Next, the inclination angle θ n of the axis line L b of the nozzle 10 with respect to the axis line L a of the liquid ejecting section 20 will be described, according to the study of the present inventors, if the inclination angle θ n is too small, the water landing range is narrowed, and the back side of the air passage 84g and a part of the blade edge 86 may not be sufficiently cleaned, and if the inclination angle θ n is too large, the rotation of the nozzle 10 becomes unstable.

Next, the number of rotations of the nozzle 10 will be described. According to the study of the present inventors, when the rotation speed of the nozzle 10 is less than 1000rpm, the density of the water trajectory is decreased, and the cleaning force is decreased. Further, if the rotation speed is low, the momentum of the injected high-pressure water in the rotation direction decreases, and the ability to peel off the deposits decreases. Accordingly, in the present embodiment, the shape of the housing 22 or the nozzle 10 is set so that the rotation speed of the nozzle 10 becomes 1000rpm or more.

Next, as described above, the cleaning force when the tip end inner diameter Dn is 1mm or more and 2mm or less, the inclination angle θ n is 10 ° or more and 20 ° or less, and the rotation speed of the nozzle 10 is set to 1000rpm or more will be described, fig. 7 and 8 are graphs showing the relationship between the cleaning force Fp and the distance L d from the tip end of the nozzle 10 to the portion 80b to be cleaned in the set state, fig. 7 shows a case where the tip end inner diameter Dn is 1.5mm, fig. 8 shows a case where the tip end inner diameter Dn is 1.05mm, and in these graphs, the horizontal axis shows the distance L d and the vertical axis shows the cleaning force Fp.

The cleaning force Fr recommended for effective cleaning of the lid is also shown in fig. 7 and 8. The cleaning force Fr is determined by the present inventors through experiments. It has been confirmed that if the cleaning force Fr is 2.0 kgf/mm or more, the air passages 84g and the blade edge 86 can be sufficiently cleaned. These graphs also show the cleaning force Fp when the water pressure Pw of the high-pressure water is set to three stages of 30MPa, 40MPa, and 50MPa in the practical range.

As shown in fig. 7, when the inner diameter Dn of the tip portion is 1.5mm, the water pressure in all three stages can be equal to or higher than the recommended cleaning force Fr if the distance L d is 200mm or less, and when the inner diameter Dn of the tip portion is 1.05mm, the water pressure in both stages of 40MPa and 50MPa can be equal to or higher than the recommended cleaning force Fr if the distance L d is 200mm or less as shown in fig. 8, and accordingly, the distance L d from the tip of the nozzle 10 to the portion 80b to be cleaned is preferably 200mm or less.

As shown in fig. 8, when the inner diameter Dn of the tip portion is 1.05mm, if the distance L d is 150mm or less, the water pressure in all three stages can be equal to or more than the recommended cleaning force Fr, and therefore, the distance L d from the tip of the nozzle 10 to the position of the portion 80b to be cleaned is more preferably 150mm or less.

Although not shown in fig. 7 and 8, it was confirmed that the cleaning force becomes higher when the tip end portion inner diameter Dn is 2.0mm, and the water pressure in all three stages reaches the recommended cleaning force Fr or more when the distance L d is 200mm or less.

Further, according to the study of the present inventors, it was found that when the distance L d is large and exceeds 200mm, the water contact range of the high-pressure water becomes too wide, the proportion of waste exceeding the air passage 84g and the blade edge 86 increases, and the high-pressure water directly hits the bricks of the heat insulating part 82, and the bricks are easily broken, and accordingly, the distance L d is preferably 200mm or less.

Next, a case where the distance L d from the tip of the nozzle 10 to the part 80b to be cleaned is small will be described, according to the study of the present inventors, it has been found that if the distance L d is too small, the water coverage becomes narrow, and the back side of the air passage 84g and a part of the blade edge 86 cannot be sufficiently cleaned, and particularly, if the distance L d is less than 100mm, only half or less of the air passage 84g and the blade edge 86 can be cleaned, and therefore, the distance L d is preferably 100mm or more.

Next, the operation and effects of the furnace lid cleaning device 100 according to the present embodiment configured as described above will be described.

The furnace lid cleaning device 100 is provided with a liquid ejecting part 20 for ejecting a cleaning liquid to a portion 80b to be cleaned of a furnace lid 80 of a coke oven, wherein the liquid ejecting part 20 has a single nozzle 10, an inner diameter Dn of a tip part of the nozzle 10 is in a range of 1mm to 2mm, and the nozzle 10 is rotated by a pressure of the liquid around another axis line inclined in a range of 10 DEG to 20 DEG with respect to an axis line of the liquid ejecting part 20, and the furnace lid cleaning device 100 is configured to maintain a distance L d from the tip of the nozzle 10 to the portion 80b to be cleaned in a range of 100mm to 200 mm.

According to this structure, even if the distance L d is set to a large range of 100mm to 200mm, a desired cleaning force can be achieved, since the distance L d is 100mm or more, the water application range can be expanded to effectively clean most of the air passage 84g and the blade edge 86, since the distance L d is 200mm or less, the amount of high-pressure water wasted beyond the air passage 84g and the blade edge 86 is reduced, and the room for supplying high-pressure water is increased, and the rate at which high-pressure water directly hits the bricks of the heat insulating portion 82 is reduced, and damage to the bricks can be prevented, and as a result, the furnace lid 80 of the coke oven can be effectively cleaned.

The furnace lid cleaning apparatus 100 can be configured to keep the distance L d from the tip of the nozzle 10 to the portion 80b to be cleaned at 150mm or less, and in this case, a small-sized and small-capacity pump can be used to achieve a desired cleaning force even when the water pressure of the high-pressure water is low, and the rate at which the high-pressure water directly hits the bricks of the heat insulating portion 82 can be reduced to prevent the bricks from being damaged, and as a result, the furnace lid 80 of the coke oven can be cleaned efficiently.

The rotation speed of the nozzle 10 may be set to 1000rpm or more. In this case, the density of the water trajectory is higher than that in the case of setting the rotation speed to be low, and the cleaning power is improved. Further, the momentum in the rotational direction of the jetted high-pressure water is increased, thereby improving the ability to peel off the attached matter.

[ 2 nd embodiment ]

Next, embodiment 2 of the present invention will be explained. Embodiment 2 of the present invention is a method for cleaning a furnace lid. The method is a cleaning method for cleaning a furnace cover 80 of a coke oven by spraying a cleaning liquid from a liquid spraying part 20 to a portion 80b to be cleaned of the furnace cover 80. The liquid ejecting section 20 has a single nozzle 10, an inner diameter Dn of a tip portion of the nozzle 10 is in a range of 1mm or more and 2mm or less, and the nozzle 10 is rotated by a pressure of the liquid around another axis inclined in a range of 10 ° or more and 20 ° or less with respect to an axis of the liquid ejecting section 20. The distance from the tip of the nozzle 10 to the part 80b to be cleaned is set within a range in which the cleaning force is 2 kgf/mm or more, depending on the inner diameter Dn of the tip and the pressure of the liquid supplied to the nozzle 10.

According to embodiment 2, since the cleaning force is 2 kgf/mm or more, the oven lid 80 of the coke oven can be cleaned efficiently.

[ embodiment 3 ]

Next, embodiment 3 of the present invention will be explained. Embodiment 3 of the present invention also relates to a method for cleaning a furnace lid. The method is a cleaning method for cleaning a furnace cover of a coke oven by spraying a cleaning liquid from a liquid spraying portion to a portion to be cleaned at a knife edge of the furnace cover. The liquid ejecting section has a single nozzle having an inner diameter in a range of 1mm to 2mm, and the nozzle is rotated by a pressure of the liquid in a state of being inclined in a range of 10 ° to 20 ° with respect to an axis of the liquid ejecting section. In the cleaning method, the nozzle is rotated at a rotation speed of 1000rpm or more, and the distance from the tip of the nozzle to the portion to be cleaned is maintained within a range of 100mm to 200mm, thereby performing cleaning.

According to embodiment 3, the distance L d is set to a large range of 100mm to 200mm, and a desired cleaning force can be achieved, since the distance L d is 100mm or more, the water application range can be expanded to effectively clean most of the air passage 84g and the blade edge 86, since the distance L d is 200mm or less, the amount of high-pressure water wasted beyond the air passage 84g and the blade edge 86 is reduced, and the supply margin of high-pressure water is increased, and the rate of high-pressure water directly hitting the bricks of the heat insulating portion 82 is reduced, and thus the bricks can be prevented from being damaged, and as a result, the furnace cover 80 of the coke oven can be effectively cleaned.

The above description explains an example of the embodiment of the present invention in detail. The above embodiments are merely specific examples for carrying out the invention. The contents of the embodiments are not intended to limit the technical scope of the present invention, and various design changes such as changes, additions, deletions, and the like of the constituent elements can be made without departing from the scope of the inventive concept defined in the claims. In the above-described embodiment, the description has been given with reference to the contents in which such a design change is possible, such as "in the embodiment" and "in the embodiment", but the contents without such a mark do not mean that the design change is not permitted. The hatching line shown in the cross section of the drawings does not limit the material of the object to be hatched.

Hereinafter, a modified example will be described. In the drawings and the description of the modified examples, the same or equivalent constituent elements and components as those of the embodiments are denoted by the same reference numerals. The description overlapping with the embodiment is appropriately omitted, and the description is repeated for the configuration different from the embodiment.

In the description of the embodiment, the example in which the support mechanism 30 extends or retracts the liquid ejecting section 20 in the front-rear direction with respect to the hanging section 84b is shown, but the present invention is not limited to this. The supporting mechanism does not have to extend or retract the liquid ejecting section in the front-rear direction, and the supporting mechanism may not have a mechanism for driving in the front-rear direction.

In the description of the embodiment, the high-pressure liquid is the 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 is added, or may contain a solvent different from water.

The above modification also has the same operation and effect as those of the above embodiment.

Any combination of the above-described embodiment and the modification is also effective as an embodiment of the present invention. The new embodiment which is created by the combination has the effects of each of the combined embodiments and modifications.

Claims (5)

1. A cleaning device for a furnace cover is characterized in that,

comprises a liquid ejecting part for ejecting cleaning liquid to a cleaned part of a furnace cover of a coke oven,

the liquid ejecting section has a single nozzle,

an inner diameter of a tip portion of the nozzle is in a range of 1mm or more and 2mm or less, and the nozzle is rotated by a pressure of the liquid around another axis inclined in a range of 10 ° or more and 20 ° or less with respect to an axis of the liquid ejecting portion,

the furnace lid cleaning device is configured to keep a distance from a tip of the nozzle to the portion to be cleaned within a range of 100mm to 200 mm.

2. The furnace lid cleaning device according to claim 1,

the furnace cover cleaning device is configured to keep a distance from a tip of the nozzle to the portion to be cleaned at 150mm or less.

3. The furnace lid cleaning device according to claim 1 or 2,

the rotation speed of the nozzle is set to 1000rpm or more.

4. A method of cleaning a furnace cover of a coke oven by spraying a cleaning liquid from a liquid spraying portion to a portion to be cleaned of the furnace cover,

the liquid ejecting section has a single nozzle, an inner diameter of a tip portion of the nozzle is in a range of 1mm or more and 2mm or less, and the nozzle is rotated by a pressure of the liquid around another axis inclined in a range of 10 ° or more and 20 ° or less with respect to an axis of the liquid ejecting section,

the distance from the front end of the nozzle to the cleaned part is set to be in a range of cleaning force of more than 2 kgf/square millimeter according to the inner diameter of the front end part and the pressure of the liquid supplied to the nozzle.

5. A method of cleaning a furnace cover of a coke oven by spraying a cleaning liquid from a liquid spraying portion to a portion to be cleaned of the furnace cover,

the liquid ejecting section has a single nozzle, an inner diameter of a tip portion of the nozzle is in a range of 1mm or more and 2mm or less, and the nozzle is rotated by a pressure of the liquid around another axis inclined in a range of 10 ° or more and 20 ° or less with respect to an axis of the liquid ejecting section,

in the cleaning method,

rotating the nozzle at a rotation speed of 1000rpm or more,

and cleaning the part by keeping the distance from the front end of the nozzle to the part to be cleaned within the range of 100mm to 200 mm.

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