Air blowing apparatus, larry car, and furnace top cleaning method

Abstract

To provide a furnace top cleaner capable of improving cleaning efficiency of a furnace top.SOLUTION: An air blowing apparatus 10 according to the present disclosure is mounted on a larry car 50 including a coal charging section 52 for charging coal into a charging inlet 92 of a coke oven 100 and is configured to blow air around rails 95 for traveling of the larry car 50, the air blowing apparatus 10 comprising an air blowing nozzle 1 configured to blow compressed air around the rails 95 in a vicinity region 94 of a target charging inlet 92A into which coal has been charged by the coal charging section 52. The air blowing nozzle 1 starts air blowing when the larry car 50 approaches the target charging inlet 92A while traveling in a first direction and stops air blowing after the larry car 50 passes through the target charging inlet 92A.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an air blowing device, a coal loading car, and a furnace top cleaning method. [Background technology]

[0002] Cleaners for cleaning the top of coke ovens are known. For example, Patent Document 1 describes a coke oven top cleaner for collecting dust that accumulates near both sides of the rails on which a coal loading car runs. This cleaner includes a carriage that runs on a rail on a coal loading car that is perpendicular to the rails. The carriage has a suction nozzle that sucks in dust while traveling, and compressed air ejection nozzles on both sides of the suction nozzle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 56-146745 Summary of the Invention [Problem to be solved by the invention]

[0004] The top cleaner is a device mounted on a coke oven coal charging car and sucks up spilled coal around the charging port by moving the intake nozzle. The top cleaner also blows compressed air from the blowout nozzle to draw the spilled coal closer to the intake nozzle.

[0005] However, there is a limit to the capacity of the compressor that can be installed on a coal-loading car, and if compressed air is constantly being blown out while the car is moving, the pressure of the blown air will drop, making it difficult to efficiently move spilled coal.

[0006] The present disclosure has been made in consideration of such problems, and one of its objects is to provide an air blowing device that can improve the efficiency of cleaning the furnace top. [Means for solving the problem]

[0007] In order to solve the above problems, one aspect of the present invention provides an air blowing device that is mounted on a coal loading car having a loading section that loads coal into a loading port of a coke oven, and that blows air around the rails along which the coal loading car travels, and that includes an air blowing nozzle that blows compressed air around the rails in the vicinity of a target loading port into which coal has been loaded by the loading section. When the coal loading car travels in a first direction, the air blowing nozzle starts blowing air when it approaches the target loading port and stops blowing air when it passes the target loading port.

[0008] Another aspect of the present invention is a coal loading car that includes a running section that runs on rails, a coal loading section that charges coal into a charging hole of a coke oven, an air blowing nozzle that blows compressed air around the rail in a region near the target charging hole into which the coal has been charged by the coal loading section, and an air suction nozzle that sucks in the coal blown by the air blowing nozzle.

[0009] Yet another aspect of the present invention is a method for cleaning the furnace top, which is a method for cleaning the furnace top using a coal loading car traveling on rails, the coal loading car having a coal loading unit that charges coal into a charging port of a coke oven, an air blowing nozzle that blows compressed air, and an air suction nozzle, and includes: an air blowing step of blowing compressed air from the air blowing nozzle onto the rail in an area near the charging port where coal has been charged by the coal loading unit; and a step of sucking the coal blown by the air blowing nozzle through the air suction nozzle.

[0010] 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. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide an air blowing device that can improve the efficiency of cleaning the furnace top. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a plan view schematically showing a coke oven equipped with a coal loading car according to an embodiment. FIG. [Figure 2]FIG. 2 is a front view schematically showing the coal loading car of FIG. 1. [Figure 3] FIG. 3 is an enlarged front view showing the periphery of the blowing nozzle of FIG. 2. [Figure 4] FIG. 4 is a diagram showing the air blowing nozzle and the air supply pipe of FIG. 3. [Figure 5] FIG. 2 is a plan view schematically showing the blowing process of the coke oven of FIG. 1. [Figure 6] FIG. 2 is a plan view schematically showing a suction process of the coke oven of FIG. 1.

[0013] The present invention will be described below based on preferred embodiments with reference to the drawings. In the embodiments and modifications, identical or equivalent components and members are designated by the same reference numerals, and redundant explanations will be omitted where appropriate. The dimensions of the members in the drawings are enlarged or reduced as appropriate to facilitate understanding. Some members that are not important for explaining the embodiments will be omitted from the drawings.

[0014] Furthermore, terms including ordinal numbers such as first and second are used to describe various components, but these terms are used only to distinguish one component from another and do not limit the components.

[0015] [Embodiment] The configuration of a coke oven 100 equipped with an air blowing device 10 according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a plan view schematically showing an example of a coke oven 100. The coke oven 100 has a plurality of coking chambers 98 arranged in a horizontal first direction. The coke oven 100 of this example has 100 coking chambers 98. FIG. 2 is a front view of the coke oven 100. This view shows one of the plurality of coking chambers 98. The coke oven 100 is equipped with a coal loading car 50 that moves on the top surface 90 of the coke oven 100. The air blowing device 10 is provided on the coal loading car 50. FIG. 3 is an enlarged front view showing the periphery of an air blowing nozzle 1. FIG. 4 is a diagram showing the air blowing nozzle 1 and an air supply pipe 18.

[0016] Hereinafter, the horizontal direction intersecting the first direction will be referred to as the second direction. In the embodiment, the first direction and the second direction are perpendicular to each other. In each drawing, the first direction is indicated by arrow X, the second direction is indicated by arrow Y, and the up-down direction is indicated by arrow Z. The first direction is the direction of movement of the coal loading car 50 and may be referred to as the traveling direction. The second direction is the direction of movement of the intake nozzle 2 of the top cleaner 20 and may be referred to as the traverse direction. These directional notations do not limit the position of the top cleaner 20 or the coal loading car 50, and the top cleaner 20 and the coal loading car 50 can be used in any position depending on the application.

[0017] The rails 95 will now be described. Two rails 95 extending in a first direction are provided on the furnace top surface 90. The rails 95 include a rail frame 96 installed on the furnace top surface 90 and a rail body 97 fixed thereon. The rail frame 96 includes a frame body 962 and a support member 964 that supports the end of the frame body 962. The furnace top surface 90 is provided with, for example, five charging ports 92 spaced apart in the second direction corresponding to each coking chamber 98. The charging ports 92 are openings for charging raw coal and have removable lids 922.

[0018] The coal loading car 50 includes wheels 58 for traveling that roll on a rail body 97, an electric motor (not shown) that rotates the wheels 58, a coal loading unit 52 that charges coal 91 into a charging port 92 provided in the furnace top surface 90, an air blowing nozzle 1, an air suction nozzle 2, a control unit 30, and a compressed air supply source 32. In the example of FIG. 1, the coal loading car 50 has four wheels 58 arranged at the vertices of a rectangle. The wheels 58 are provided with absolute encoders (not shown), which acquire rotation information based on the rotation of the wheels 58 and transmit the acquired information to the control unit 30. The wheels 58 can rotate around a rotation axis La extending in the second direction.

[0019] The control unit 30 includes an information processing device such as a CPU, and controls the operation of each component of the coal loading car 50. Based on the rotation information, the control unit 30 can identify the first direction positions of the coal loading car 50, coal loading section 52, air blowing nozzle 1, and air intake nozzle 2 at the furnace top surface 90. Based on the identified positions, the control unit 30 controls the operation of the coal loading car 50, coal loading section 52, air blowing nozzle 1, and air intake nozzle 2.

[0020] In this embodiment, the coal loading car 50 has, for example, five coal loading sections 52 arranged at predetermined intervals in the second direction. The coal loading car 50 can move in the first direction along the rails 95 by rotating the wheels 58. The coal loading car 50 moves in the first direction on the furnace top surface 90 of the coking chamber 98 to load coal into the coking chamber 98 to be loaded.

[0021] A coal tower 80 is provided at one end side in the first direction of the coke oven 100. The coal tower 80 supplies the stored raw coal to the coal loading section 52.

[0022] The basic operation of the coal loading car 50 will be described. The coal loading car 50 includes a coal receiving process, a charging process, a blowing process, and a suction process. In the coal receiving process, the coal loading car 50 travels in a first direction to the coal tower 80 and receives coal from the coal tower 80 into the coal loading section 52. Next, the coal loading car 50 travels in the first direction up to the target charging port 92 (hereinafter referred to as the charging port 92A) and stops. The charging port 92A is the target charging port for the empty coking chamber 98 into which coal should be charged, which has been previously identified by the control unit 30. Figure 1 shows the coal loading car 50 stopped above the charging port 92A. In the charging process, the coal loading section 52, in the state shown in Figure 1, removes the lid 922 from the charging port 92A, charges coal 91 through the charging port 92A, and attaches the lid 922 to the charging port 92A.

[0023] After the charging process is completed, the coal loading car 50 travels back to the coal tower 80 in the first direction, and performs the air blowing process and suction process during the return trip. After arriving at the coal tower 80, the coal loading car 50 repeats the coal receiving process, the outward trip, the charging process, the air blowing process, the suction process, and the return trip.

[0024] Before describing the air blowing process and the suction process, the top cleaner 20 will be described. When charging coal 91, some of the coal 91 spills around the charging port 92A on the furnace top surface 90. Therefore, the top cleaner 20 of this embodiment is equipped with an air intake nozzle 2 that sucks in the coal 91 that has spilled onto the furnace top surface 90. The top cleaner 20 moves the air intake nozzle 2 in the second direction near the furnace top surface 90, sucking in the coal 91 with the air intake nozzle 2, and transports the sucked coal 91 to a treatment device (not shown) via a transfer pipe (not shown) for predetermined processing. When the coal loading car 50 completes charging coal into the target coking chamber 98, it selects the next coking chamber 98 that is five chambers away as the target coking chamber. Therefore, it is preferable that the top cleaner 20 be located five chambers away from the coal loading section 52. By arranging in this manner, the charging process by the coal loading section 52 and the suction process of the previously loaded coke chamber 98 can be performed simultaneously. The mechanism for moving the suction nozzle 2, the piping for transporting the coal 91, and the processing equipment are well known, so a description thereof will be omitted.

[0025] In the embodiment, the furnace top cleaner 20 has two intake nozzles 2 spaced apart from each other in the second direction. As an example, the intake nozzle 2 has a rectangular intake opening with a longitudinal direction along the first direction in a plan view. In the embodiment, the furnace top cleaner 20 operates the intake nozzle 2 in a transfer area 21 provided on the side of the coal loading car 50 farther from the coal tower 80. For example, the furnace top cleaner 20 sucks in coal 91 while moving the intake nozzle 2 back and forth in the second direction from one end to the other end of the transfer area 21.

[0026] However, when the suction nozzle 2 moves in the second direction, in order to avoid interference with the rail 95, the suction nozzle 2 is controlled to rise just before the rail 95 and to descend after passing the rail 95. For this reason, it is difficult for the suction nozzle 2 to suck up most of the coal 91 that has spilled near the base of the rail frame 96. The coal 91 that is not sucked up by the suction nozzle 2 may later be removed manually, requiring additional labor. Therefore, the coal loading car 50 of this embodiment is equipped with an air blowing nozzle 1 that blows compressed air J around the rail 95, particularly near the base of the rail 95, in a region 94 near the charging entrance 92A. By blowing compressed air J, the coal 91 that has spilled near the base of the rail 95 (specifically, the rail frame 96) moves away from the rail frame 96, making it possible for the suction nozzle 2 to suck it up.

[0027] (Blow process) The air blowing nozzle 1 and the air blowing process will be described with reference to Figures 3, 4, and 5. The air blowing process is a process in which, after coal 91 is charged into a target charging hole 92A in the charging process, compressed air J is blown around a rail 95 using the air blowing nozzle 1 in a region 94 near the target charging hole 92A. Note that, in the air blowing process, the suction nozzle does not suction the coal 91 spilled onto the furnace top surface 90 in the region 94. The air blowing process in this embodiment is performed while the coal loading car 50 is moving in the first direction, as indicated by arrow M. In this example, the air blowing process is performed while the coal loading car 50 is moving toward the coal tower 80. The air blowing device 10 is installed between the top cleaner 20 and the coal loading section 52 in the first direction. Figure 3 is an enlarged front view of the air blowing nozzle 1 and its surroundings. Figure 4 is a diagram showing the air blowing nozzle 1 and an air supply pipe 18 that supplies compressed air to the air blowing nozzle 1. Fig. 4(A) shows a plan view of the air blowing nozzle 1 and the air supply pipe 18, and Fig. 4(B) shows a side view of the air blowing nozzle 1 and the air supply pipe 18. Fig. 5 is a plan view schematically showing the air blowing process.

[0028] As an example, as shown in FIG. 3 , the air blowing nozzle 1 blows air so that the main stream of compressed air J reaches the rail frame 96. In this specification, the main stream of compressed air J refers to a bundle of air currents including an air current flowing through the center of the compressed air J. In particular, the air blowing nozzle 1 blows air so that the main stream of compressed air J collides with a corner Q at the lower end of the rail frame 96. In this case, the compressed air J is reflected at the lower end of the rail frame 96, allowing the coal 91 in the vicinity to be moved efficiently. In the embodiment, an extension line Lc extending from the tip of the nozzle 1 in the extension direction of the nozzle 1 passes through the corner Q at the lower end of the rail frame 96.

[0029] The compressed air supply source 32 includes a compressor, piping, a supply control valve, and other components (not shown) and supplies compressed air at a timing controlled by the control unit 30. The air supply pipe 18 distributes compressed air from the compressed air supply source 32 to the air blowing nozzle 1. The air blowing nozzle 1 is disposed so as to protrude from the side of the air supply pipe 18. Various types of air nozzles having outlet holes capable of ejecting compressed air can be used as the air blowing nozzle 1. The air blowing nozzle 1 in this embodiment is a straight-type air nozzle with a substantially circular outlet hole. In the example shown in FIG. 3, two sets of air blowing nozzles 1 and air supply pipes 18 are provided, spaced apart in the second direction by a rail 95. Each set is disposed symmetrically with respect to the rail 95. While FIG. 3 shows only the compressed air J blown from one set, compressed air J is blown from both sets. The type, size, quantity, and arrangement of the air blowing nozzles 1 can be determined through experiments to achieve the desired effect.

[0030] Although there is no limitation on the number of blowing nozzles 1, in this embodiment, multiple blowing nozzles 1 are provided at intervals from each other along the first direction. In particular, in the example shown in FIG. 4, three blowing nozzles 1 are provided at predetermined intervals along the first direction on one air supply pipe 18. In this case, air can be blown over a wide range in the first direction, and the outlet pressure of the blowing nozzles 1 can be set higher than when there are an excessive number of nozzles. As shown in FIG. 4, the air supply pipe 18 has a horizontal portion 181 extending horizontally along the first direction to direct compressed air supplied from above in the first direction, and the blowing nozzle 1 is attached to the horizontal portion 181. The tip of the horizontal portion 181 is closed by an end cap 182.

[0031] The preferred position of the air blowing nozzle 1 will now be explained. The air blowing nozzle 1 is positioned to avoid interference with the coal loading car rails, rail base, and sensors for adjusting the stopping position. The tip 12 of the air blowing nozzle 1 is positioned lower than the rotation axis La of the wheel 58 and higher than the rail base 96. In addition, the horizontal part 181 is positioned lower than the rotation axis La and higher than the rail base 96.

[0032] The preferred position of the air intake pipe 18 will now be described. The distance D1 from the center of the horizontal portion 181 of the air intake pipe 18, as viewed from the front, to the corner Q of the lower end of the rail frame 96 is preferably in the range of 150 mm to 300 mm. The center of this horizontal portion 181 is the intersection of the upper and lower bisectors of the horizontal portion 181 and the second direction bisector. The height H1 of the center of the horizontal portion 181, as viewed from the front, from the furnace top surface 90 is preferably twice the distance D1, or in the range of 300 mm to 600 mm. The inclination angle θ1 of the blowing nozzle 1, which is the inclination of the extension line Lc of the nozzle 1, is preferably obliquely downward in the range of more than 0° and less than 90° with respect to the horizontal plane, as viewed from the front, preferably in the range of 60° to 80°, and more preferably in the range of 70° to 80°. It has been confirmed that the desired coal movement effect can be achieved by setting the outlet pressure of the air blowing nozzle 1 to 0.1 MPa or more with this configuration. Due to constraints such as the space required to mount the compressor on the moving machine, it is preferable that the nozzle outlet pressure be 1.0 MPa or less.

[0033] The mode of air blowing in the air blowing process will now be described. Due to restrictions on the load weight, etc., the amount of compressed air supplied by the compressed air supply source 32 that can be mounted on the coal loading car 50 is limited. If compressed air is constantly blown out under conditions of a constant supply amount, the outlet pressure of the air blowing nozzle 1 will be suppressed to, for example, about 0.05 MPa. As a result of investigation, it was found that this pressure is insufficient to move the coal 91, and that a large amount of coal 91 remains around the rail frame 96.

[0034] Therefore, the furnace top cleaner 20 of the embodiment blows compressed air J from the blowing nozzle 1 into a region 94 in the vicinity of the charging port 92A after the coal 91 has been charged by the coal loading section 52.

[0035] When the coal loading car 50 travels in the first direction toward the coal tower 80, the air blowing nozzle 1 starts blowing when it approaches the charging port 92A within a predetermined distance, and stops blowing when it passes the target charging port 92A and moves away from the target charging port 92A by a predetermined distance. In this case, the amount of compressed air J used can be reduced compared to when the air is constantly blown out, and the outlet pressure of the air blowing nozzle 1 can be increased under conditions where the supply amount of compressed air is constant. In this case, the effect of moving the coal 91 is improved, and the amount of coal 91 remaining around the rail frame 96 can be reduced. As an example, in this embodiment, the air blowing nozzle 1 achieves an outlet pressure of about 0.2 MPa.

[0036] As an example, the air blowing nozzle 1 may be configured to start blowing when it approaches the center of the loading port 92A within a distance of less than one time the throat spacing described below, and to stop blowing when it moves away from the center of the loading port 92A within a distance of less than one time the throat spacing.

[0037] The outlet pressure of the air blowing nozzle 1 and the air blowing distance, which is the distance traveled by the air blowing nozzle 1 from when it starts blowing until it stops, can be set by experiment or simulation using parameters such as the amount of compressed air supplied so as to obtain a desired coal movement effect. The air blowing distance may be set according to the throat spacing, which is the spacing between the charging ports 92 in the first direction. For example, it can be set in the range of 1 to 3 times the throat spacing, and in this embodiment it is set to 2 times. As an example, the throat spacing may be 1500 mm to 1600 mm.

[0038] The scattering restriction member 57 will now be described. If the coal 91 is scattered over a wide area by the compressed air J from the air blowing nozzle 1, it may not be possible to suck it up with the air suction nozzle 2. Therefore, the top cleaner 20 of this embodiment has a scattering restriction member 57 for restricting the scattering range of the coal 91 caused by the air blowing. There is no limitation on the shape of the scattering restriction member 57, but the scattering restriction member 57 of this embodiment is a sheet metal member bent into an angular C-shape in plan view. In the example of FIG. 3, two scattering restriction members 57 are arranged apart in the second direction, sandwiching a rail 95 between them. The shape of the scattering restriction member 57 can be determined by experimentation so as to obtain the desired scattering restriction effect.

[0039] (Suction process) The suction process will be described with reference to FIG. 6 as well. FIG. 6 is a plan view schematically illustrating the suction process. In the suction process, after the air blowing nozzle 1 has blown the coal 91, the suction nozzle 2, which is moved in the second direction as indicated by the arrow N, sucks in the coal 91 that has spilled onto the furnace top surface 90 in the nearby region 94 during the charging process. The suction process of this embodiment is performed while the coal loading car 50 is moving in the first direction toward the coal tower 80 as indicated by the arrow M. In this embodiment, the suction nozzle 2 sucks in the nearby region 94 after the air blowing nozzle 1 has blown the coal 91. In this case, most of the coal 91 has been moved to a position away from the rail frame 96 during the air blowing process, and therefore can be removed by the suction nozzle 2, reducing the labor required to manually remove the remaining coal 91.

[0040] In this embodiment, the air intake nozzle 2 is provided on the opposite side of the air intake nozzle 1 from the coal loading section 52 in the first direction. In other words, the air intake nozzle 1 is disposed closer to the coal tower 80 than the air intake nozzle 2 in the first direction. The distance between the air intake nozzle 1 and the air intake nozzle 2 in the first direction can be set in the range of 1 to 3 times the furnace throat spacing, and in this embodiment, it is set to twice the furnace throat spacing.

[0041] The intake nozzle 2 may be configured to always intake air, or to start intake when it approaches the center of the loading port 92A at a distance of less than one time the furnace throat spacing, and to stop intake when it moves away from the center of the loading port 92A at a distance of less than one time the furnace throat spacing.

[0042] The features of the air blowing device 10 of this embodiment configured as described above will be described. The air blowing device 10 is mounted on a coal loading car 50 having a coal loading section 52 that loads coal into a loading port 92 of a coke oven 100, and is an air blowing device that blows air around a rail 95 along which the coal loading car 50 travels, and is equipped with an air blowing nozzle 1 that blows compressed air around the rail in a region 94 near a target loading port 92A into which coal has been loaded by the coal loading section 52. When the coal loading car 50 travels in a first direction toward the coal tower 80, the air blowing nozzle 1 starts air blowing when it approaches the target loading port 92A and stops air blowing when it passes the target loading port 92A.

[0043] According to this configuration, the air blowing nozzle 1 only needs to blow air mainly during the period before and after passing through the target charging port 92A, so even if the supply amount of compressed air is limited, it is possible to increase the outlet pressure of the air blowing nozzle 1. As a result, the coal 91 can be moved to an area where it is easier to suck in by the suction nozzle 2, and the cleaning efficiency of the furnace top surface 90 can be improved.

[0044] The above is a description of the embodiment.

[0045] The above describes in detail exemplary embodiments of the present invention. The above-described embodiments merely illustrate specific examples of implementing the present invention. The content of the embodiments does not limit the technical scope of the present invention, and many design modifications, such as changes, additions, and deletions of components, are possible within the scope of the inventive concept defined in the claims. In the above-described embodiments, content that allows such design modifications is described using notations such as "in the embodiment" or "in the embodiment," but design modifications are also permitted in content that does not have such notations. Furthermore, hatching on cross sections in the drawings does not limit the material of the hatched object.

[0046] The inventions defined in each claim may be combined in any manner as long as no contradiction occurs. It will be understood by those skilled in the art that this specification also discloses new inventions resulting from such combinations. It will be understood by those skilled in the art that an embodiment made up of multiple components can be realized with a single component, and that an embodiment made up of a single component can be realized with multiple components.

[0047] The following describes the modified examples. In the drawings and descriptions of the modified examples, the same or equivalent components and members as those in the embodiment are denoted by 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.

[0048] (Variation) In the above description, an example has been shown in which the height of the horizontal portion 181 of the air supply pipe 18 is fixed, but the present invention is not limited to this. For example, a variable support mechanism configured to change the height of the horizontal portion 181 may be provided. As one example, a variable support mechanism can be realized by making the vertically extending portion of the air supply pipe 18 connected to the base end side of the horizontal portion 181 replaceable with one of a different length. As another example, a variable support mechanism can be realized by making the vertically extending portion of the air supply pipe 18 flexible.

[0049] In the above description, an example has been shown in which the air blowing process and the suction process are performed while the coal loading car 50 is moving in the first direction toward the coal tower 80, but the present invention is not limited to this. For example, the air blowing process or the suction process may be performed while the coal loading car 50 is stopped.

[0050] In the above description, an example was shown in which three air blowing nozzles 1 are provided on one air supply pipe 18, but the present invention is not limited to this. The number of air blowing nozzles 1 attached to one air supply pipe may be one, two, four or more.

[0051] In the above description, an example has been shown in which the rail 95 includes the rail frame 96, but the present invention is not limited to this. The rail body 97 may be provided directly on the furnace top surface 90.

[0052] In the above description, an example has been shown in which the rail frame 96 includes the support member 964, but the present invention is not limited to this.

[0053] In the above description, an example was shown in which the air blowing nozzle 1 was attached to the horizontal portion 181, but the present invention is not limited to this. For example, the air blowing nozzle 1 may be provided at a location other than the horizontal portion, such as a vertically extending portion of the air supply pipe 18.

[0054] In the above description, an example has been shown in which the coal tower 80 is provided at one end side in the first direction of the coke oven 100, but the present invention is not limited to this. The coal tower 80 may be provided at the center of the coke oven 100 in the first direction or at the other end side, or may be provided between the center and one end in the first direction, or between the center and the other end in the first direction.

[0055] In the above description, an example has been shown in which the furnace top cleaner 20 is provided farther from the coal tower 80 than the coal loading section 52 in the first direction, but the present invention is not limited to this. The furnace top cleaner 20 may also be provided closer to the coal tower 80 than the coal loading section 52 in the first direction.

[0056] In the above description, an example has been shown in which the suction process is performed while the coal loading car 50 is moving in the first direction toward the coal tower 80 after the coal 91 has been loaded into the target loading port 92A in the loading process, but the present invention is not limited to this. The suction process may also be performed while the coal loading car 50 is moving toward the coking chamber of the next target to be loaded after the coal has been received from the coal tower 80 in the coal loading section 52.

[0057] When the furnace top cleaner 20 is positioned closer to the coal tower 80 than the coal loading section 52, the air blowing process may be performed while the coal loading car 50 is moving in a first direction toward the coal tower 80 after coal 91 has been loaded into the target loading port 92A in the loading process, and the suction process may be performed while the coal loading car 50 is moving toward the carbonization chamber of the next target to be loaded after coal has been received from the coal tower 80 in the coal loading section 52.

[0058] In the above description, the air blowing device is provided between the coal loading section 52 and the top cleaner 20 in the first direction, but this is not limited to this. The air blowing device may be provided on the opposite side of the top cleaner 20 in the first direction, with the coal loading section 52 sandwiched between the top cleaner 20 and the air blowing device. Alternatively, two air blowing devices may be provided in the first direction, with the coal loading section 52 sandwiched between them.

[0059] Each of the above-described modifications provides the same functions and effects as the embodiment.

[0060] Any combination of the components and modifications of the above-described embodiments is also useful as an embodiment of the present invention. A new embodiment resulting from the combination has the combined effects of the combined embodiments and modifications. [Explanation of symbols]

[0061] 1 Air blowing nozzle, 2 Intake nozzle, 10 Air blowing device, 18 Air intake pipe, 20 Furnace top cleaner, 50 Coal loading car, 52 Coal loading section, 57 Splash control member, 58 Wheel, 90 Furnace top surface, 91 Coal, 92 Loading opening, 94 Nearby area, 95 Rail, 96 Rail stand, 97 Rail body, 100 Coke oven.

Claims

1. 1. An air blowing device mounted on a coal loading car having a coal loading section for loading coal into a charging port of a coke oven, the air blowing device blowing air around a rail for running the coal loading car, An air blowing nozzle that blows compressed air around the rail in a region near the target charging port into which coal is charged by the coal charging unit, The air blowing device includes an air blowing nozzle that starts air blowing when the coal loading car approaches the target loading opening and stops air blowing when the coal loading car passes the target loading opening when the coal loading car travels in a first direction.

2. 2. The air blowing device according to claim 1, wherein the air blowing nozzle blows air so that a main stream of compressed air reaches a rail frame located between the rail on which the coal loading car runs and the furnace top surface.

3. 3. The air blowing device according to claim 2, wherein the tip of the air blowing nozzle is positioned lower than the rotation axis of the wheels for running the coal loading car and higher than the rail frame.

4. 2. The air blowing device according to claim 1, wherein the air blowing nozzle is attached to a horizontal portion extending along a first direction of an air supply pipe that supplies compressed air to the air blowing nozzle.

5. 5. The air blowing device according to claim 4, wherein the air blowing nozzle is inclined obliquely downward with respect to a horizontal plane within a range of more than 0° and less than 90°.

6. 5. The air blowing device according to claim 4, wherein the height of the horizontal portion from the furnace top surface is 300 mm or more and 600 mm or less.

7. The air blowing device according to claim 5 , wherein a plurality of the air blowing nozzles are provided at intervals along the first direction.

8. 2. The air blowing device according to claim 1, further comprising a scattering control member for controlling the range of scattering of coal caused by the air blowing from the air blowing nozzle.

9. a running unit that runs on a rail; a coal charging section that charges coal into a charging port of the coke oven; an air blowing nozzle that blows compressed air around the rail in a region near a target charging port into which coal is charged by the coal charging unit; an intake nozzle that sucks in the coal blown by the blowing nozzle; A coal-loading car equipped with a.

10. A method for cleaning the top of a coke oven using a coal loading car traveling on rails, the coal loading car having a coal loading section for loading coal into a charging port of the coke oven, an air blowing nozzle for blowing compressed air, and an air intake nozzle, comprising: a blowing step of blowing compressed air from the blowing nozzle onto the rail in a region near a charging port into which coal is charged by the coal charging unit; a step of sucking the coal blown by the blowing nozzle by the suction nozzle; Cleaning methods including.

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