Tarpan Cleaner

Abstract

To provide a tar pan cleaner capable of more surely removing tar on a tar pan.SOLUTION: A tar pan cleaner 1 is disposed on a side of a blast furnace bottom 101 of a coke oven 100, and is intended to clean a tar pan 105 having an inclined shape whose height position becomes higher as coming closer to a throat part 103 of the coke oven 100. The tar pan cleaner includes: a scraper 63 configured to scrape up tar 200 on the tar pan 105 while moving in a front-back direction X as approaching and separating directions with respect to the throat part 103; and a spray nozzle 42 which is configured to be movable along a left-right direction Y as a width direction of the tart pan 105 with respect to the tar pan 105, and injects cleaning fluid F to the tar pan 105.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a tar pan cleaner for removing tar adhering to a tar pan provided at the lower part of a furnace lid frame installed on the front side (the side where red-hot coke is discharged) or the rear side (the side where coal is extruded) of a coke oven.

Background Art

[0002] Conventionally, in the carbonization chamber of a coke oven for producing coke used in ironmaking in a blast furnace, gas containing a tar component is generated during operation, and the generated gas leaks out from the furnace lids provided at the front and rear of the carbonization chamber and is cooled. For this reason, the tar component in the gas becomes tar and adheres to the tar pan provided at the lower part of the furnace lid frame. Also, tar may directly fall from the furnace lid and adhere to the tar pan. The tar pan has a slope shape that goes downward as it moves away from the furnace lid, but the high-temperature tar adheres to the tar pan before it falls from the tar pan. Therefore, a scraper is provided on a vehicle (also referred to as a moving machine) installed in the coke oven, for example, a guide vehicle, and the scraper is moved from the upper side to the lower side of the tar pan to drop the tar adhering to the tar pan from the tar pan. Further, in addition to the scraper, a jet nozzle for injecting a fluid such as water is used to peel the tar on the tar pan from the tar pan with high-pressure fluid, thereby dropping the tar from the tar pan (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration described in Patent Document 1, the injection nozzle is fixed to the scraper, and high-pressure fluid can only be injected to a portion of the scraper's width. As a result, the high-pressure fluid from the injection nozzle cannot be injected onto most of the tar pan, and there is room for improvement in the performance of causing tar to fall from the tar pan.

[0005] In view of the above background, the present invention aims to provide a tar pan cleaner that can more reliably remove tar from a tar pan. [Means for solving the problem]

[0006] The present invention is essentially a tar cleaner described below.

[0007] (1) A tar pan cleaner for cleaning a sloping tar pan, which is located on the bottom side of a coke oven and whose height increases as it approaches the opening of the coke oven, A scraper configured to scrape the object on the tar pan while moving in the front-rear direction, which is a direction toward and away from the furnace opening, A spray nozzle is configured to be movable along the left-right direction, which is the width direction of the tar pan, and sprays cleaning liquid onto the tar pan, A tar pan cleaner equipped with this feature.

[0008] (2) The tar pan cleaner according to (1), wherein the spray nozzle is configured to be movable independently of the displacement of the scraper.

[0009] (3) A first movable base for moving the scraper in the front-rear direction, A second movable base is supported by the first movable base so as to move in the front-rear direction and supports the injection nozzle so as to be movable in the left-right direction, The tar pan cleaner described in (2) above, further comprising the above.

[0010] (4) The system further comprises a supply pipe for supplying the cleaning liquid to the spray nozzle, The tar pan cleaner according to (3), wherein the supply pipe comprises a first pipe installed on the first movable base and rising upward from the first movable base, a second pipe installed on the second movable base and rising upward from the second movable base, and a flexible pipe connecting the first pipe and the second pipe.

[0011] (5) The tar pan cleaner according to (1), wherein the spray nozzle is located at a point on the scraper that is positioned behind the portion that scrapes the tar pan.

[0012] (6) The tar pan cleaner according to any one of (1) to (5) above, wherein the spray nozzle is configured to spray the cleaning liquid and move back and forth once in the left-right direction, then move a predetermined amount in the front-back direction away from the furnace opening, and then spray the cleaning liquid again. [Effects of the Invention]

[0013] According to the present invention, tar on a tar pan can be removed more reliably. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a plan view showing a tar pan cleaner and a part of a coke oven according to one embodiment of the present invention, showing both the rear end position and the front end position of the injection nozzle and scraper. [Figure 2] Figure 2 is a side view showing a tar pan cleaner and a portion of a coke oven, illustrating both the rear and front positions of the injection nozzle and scraper. [Figure 3] Figure 3 is a front view of the tar pan cleaner, showing the tar pan cleaner as viewed from the coke oven side, and illustrates both the rightmost and leftmost positions of the left and right sliding units. [Figure 4] Figure 4 is an enlarged view of a portion of the plan view in Figure 1. [Figure 5] FIG. 5 is a further enlarged view of a part of the plan view of FIG. 4. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5, showing the state as viewed in the left-right direction. [Figure 7] FIG. 7 is a block diagram for explaining a configuration related to the control of the tar pan cleaner. [Figure 8] FIG. 8 is a flowchart for explaining an example of the operation of the tar pan cleaner.

MODE FOR CARRYING OUT THE INVENTION

[0015] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[0016] FIG. 1 is a plan view showing the tar pan cleaner 1 according to an embodiment of the present invention and a part of the coke oven 100, showing both when the injection nozzle 42 and the scraper 63 are at the rear end position X1 and the front end position X2. FIG. 2 is a side view showing the tar pan cleaner 1 and a part of the coke oven 100, showing both when the injection nozzle 42 and the scraper 63 are at the rear end position X1 and the front end position X2. FIG. 3 is a front view of the tar pan cleaner 1, showing the state of viewing the tar pan cleaner 1 from the side of the coke oven 100, showing both when the left and right slide units 23 are at the right end position Y1 and the left end position Y2. FIG. 4 is an enlarged view of a part of the plan view of FIG. 1. FIG. 5 is a further enlarged view of a part of the plan view of FIG. 4. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5, showing the state as viewed in the left-right direction Y. In each figure, the moved part is indicated by a two-dot chain line which is an imaginary line.

[0017] In this specification, the direction (horizontal direction) of approaching and separating from the furnace mouth portion 103 of the coke oven 100 is referred to as the front-back direction X. The direction towards the coke oven 100 side in the front-back direction X is referred to as the front, and the direction away from the coke oven 100 is referred to as the rear. Also, the width direction (horizontal direction) of the tar pan 105 of the coke oven 100 is referred to as the left-right direction Y. When looking at the tar pan cleaner 1 from the coke oven 100, the right side in the left-right direction Y is referred to as the right, and the left side is referred to as the left. Further, the up and down along the vertical direction is referred to as the up-down direction Z. The front-back direction X, the left-right direction Y, and the up-down direction Z are orthogonal to each other.

[0018] Referring to FIGS. 1 to 4, the tar pan cleaner 1 is provided for cleaning the tar pan 105 by removing the tar 200 adhering to the tar pan 105 of the coke oven 100 from the tar pan 105. Prior to the description of the tar pan cleaner 1, the configuration of the coke oven 100 will be described.

[0019] The coke oven 100 is used to make coke from coal. In the coke oven 100, a large amount of coal is heated at about 1200°C to 1300°C for a predetermined time to become coke. At this time, in addition to coke, tar is generated. The coke oven 100 is formed, for example, in a box shape with an interior partitioned into multiple layers.

[0020] The coke oven 100 has a furnace bottom 101, a vertical wall 102 rising from the furnace bottom 101, a furnace mouth portion 103 formed in the vertical wall 102, a furnace lid 104 installed at the furnace mouth portion 103, and a tar pan 105 disposed below the furnace mouth portion 103 and the furnace lid 104.

[0021] The furnace bottom 101 is a floor portion that forms the lower end of the accommodation chamber in the coke oven 100 where coal (coke) is accommodated. The vertical wall 102 is disposed at one end (the left end in FIG. 2) of the furnace bottom 101.

[0022] The vertical wall 102 rises upward from the furnace bottom 101. The furnace mouth portion 103 is formed in the vertical wall 102.

[0023] The furnace opening 103 is located above the top of the tar pan 105. Through the furnace opening 103, for example, coke can be removed from the coke oven 100. The furnace opening 103 is opened and closed by the furnace lid 104.

[0024] The furnace cover 104 is positioned near the furnace bottom 101 and has a frame 106 that protrudes from the vertical wall 102. Below the frame 106, the tar pan 105 is positioned.

[0025] The tar pan 105 is located on the bottom side of the coke oven 100 and is a sloping section whose height increases as it approaches the oven opening 103 of the coke oven 100. It is provided to guide the tar 200 that falls from inside the coke oven 100 when the oven lid 104 is opened, etc., to a conveyor 107 installed on the side of the coke oven 100. The tar 200 that falls onto the conveyor 107 is transported by the conveyor 107 to a predetermined collection location. In this embodiment, the tar pan 105 is connected to the vertical wall 102 and is formed in a sloping shape that slopes downward as it moves away from the oven bottom 101 (as it moves backward). A part of the upper side of the tar pan 105 is located below the oven lid 104, while the remaining part of the tar pan 105 is located behind the oven lid 104. That is, a narrow space 108 is formed above the tar pan 105 where the tar pan 105 and the oven lid 104 are aligned vertically.

[0026] The tar pan cleaner 1 is mounted on a base 2 and is movable in the left-right direction Y. This allows the tar pan cleaner 1 to individually clean the multiple tar pans 105 provided in the coke oven 100.

[0027] The tar pan cleaner 1 includes a base 3 located at the rear of the tar pan cleaner 1 and mounted on a pedestal 2, a front-rear drive mechanism 4 supported by the base 3, a movable unit 5 that moves in the front-rear direction X by the front-rear drive mechanism 4, and a scraper unit 6 supported by the movable unit 5.

[0028] The base 3 has a first base member 11 that is fixed to the base 2 and is elongated in the left-right direction Y, and a pair of second base members 12, 12 that are fixed to the base 2 and are elongated in the front-back direction X.

[0029] The first base member 11 and the pair of second base members 12, 12 are fixed to the base 2 and are movable in the left-right direction Y together with the base 2.

[0030] The first base member 11 is positioned between a pair of left and right second base members 12, 12. A front and rear drive mechanism 4 is mounted on the first base member 11.

[0031] A pair of second base members 12, 12 are provided to support a pair of left and right movable rails 26, 26, which will be described later. A roller base 13 is installed on each of the pair of second base members 12, 12, and the roller base 13 supports the rollers 14.

[0032] In this embodiment, the front-rear drive mechanism 4 includes a hydraulic cylinder mechanism. The front-rear drive mechanism 4 has a cylinder 15 as a fixed part fixed to the first base member 11 and a rod 16 as a movable part that protrudes forward from the cylinder 15. The front-rear drive mechanism 4 only needs to be configured to move the movable unit 5 in the front-rear direction X, and may be a drive mechanism other than a hydraulic cylinder. Examples of such drive mechanisms include a rack and pinion mechanism that converts the output rotation of an electric motor or hydraulic motor installed on the first base member 11 into front-rear movement of the movable unit 5. The movable unit 5 is positioned in front of the base 3 and the front-rear drive mechanism 4 having the above configuration. The movable unit 5 is configured to be movable in the front-rear direction X.

[0033] The movable unit 5 includes a first movable base 21 that moves integrally with the rod 16 of the front-rear drive mechanism 4 in the front-rear direction X, a left-right drive mechanism 22 supported by the first movable base 21, and a left-right slide unit 23 that moves in the left-right direction Y by the left-right drive mechanism 22.

[0034] The first movable platform 21 is provided for moving the scraper 63 and the injection nozzle 42, which will be described later, in the front-rear direction X.

[0035] The first movable platform 21 includes a hook 25 connected to a rod 16 of the front-rear drive mechanism 4, a movable base 24 to which the hook 25 is fixed, a pair of left and right rails 26, 26 extending rearward from the movable base 24, a pair of left and right front and rear beams 27, 27 extending forward from the movable base 24, a pair of left and right slide rail fixing parts 28, 28 installed on the pair of front and rear beams 27, 27, and a pair of front and rear slide rails 29, 29 supported by the pair of slide rail fixing parts 28, 28.

[0036] The hook 25 is positioned, for example, in the center of the first movable platform 21 in the left-right direction Y, and is connected to the rod 16 of the front-rear drive mechanism 4 so as to move integrally with the rod 16 in the front-rear direction X. In this embodiment, the hook 25 is fixed to the rear of the movable base 24.

[0037] The movable base 24 is, for example, a plate-like member that extends elongated in the left-right direction Y, and is positioned in an upright position. A pair of rails 26, 26 are fixed to the right and left portions of the rear of the movable base 24, and these rails 26, 26 extend rearward from the movable base 24.

[0038] A pair of left and right rails 26, 26 are supported by rollers 14, 14 on the base 3. When the rails 26, 26 move in the front-rear direction X, the rollers 14, 14 make rolling contact with the rails 26, 26, allowing the first movable platform 21, including the rails 26, 26, to move smoothly in the front-rear direction X. In this embodiment, a pair of front-rear beams 27, 27 are arranged at both the left and right ends of the movable base 24.

[0039] A pair of front and rear beams 27, 27 are fixed to, for example, the front of the movable base 24 and extend along the front-rear direction X. The front and rear beams 27, 27 are formed using, for example, channel steel. The space between the pair of front and rear beams 27, 27 is also space for the injection nozzle 42 to move in the left-right direction Y. A pair of left and right slide rail fixing parts 28, 28 are fixed to, for example, the upper surfaces of the pair of front and rear beams 27, 27.

[0040] The slide rail fixing parts 28, 28 are block-shaped members. In this embodiment, the slide rail fixing parts 28, 28 have holes formed along the left-right direction Y, and the slide rails 29, 29 are inserted into these holes. In this way, the slide rails 29, 29 are fixed to the slide rail fixing parts 28, 28.

[0041] The slide rails 29, 29 support the left and right slide units 23, which include the injection nozzles 42, and are configured to allow the left and right slide units 23 to move in the left-right direction Y relative to the first movable base 21. In this embodiment, a pair of slide rails 29, 29 are provided, one in the front and one in the rear, and both extend in the left-right direction Y. Each of the slide rails 29, 29 may be formed with a circular cross-section, an elliptical cross-section, or a polygonal cross-section in a cross-section perpendicular to the left-right direction Y. A left-right drive mechanism 22 is arranged to allow the left and right slide units 23 to move in the left-right direction Y on the slide rails 29, 29.

[0042] Referring to Figures 1 to 6, the left-right drive mechanism 22 in this embodiment is a hydraulic cylinder mechanism. The left-right drive mechanism 22 has a cylinder 31 as a fixed part that is fixed directly to one of the pair of front and rear beams 27, 27 (the right front and rear beam 27 in this embodiment) or via a stay 30 as in this embodiment, and a rod 32 as a movable part that protrudes from the cylinder 31 in the left-right direction Y (left). The left-right drive mechanism 22 only needs to be configured to move the left-right slide unit 23 in the left-right direction Y, and may be a drive mechanism other than a hydraulic cylinder. Examples of such drive mechanisms include a rack and pinion mechanism that converts the output rotation of an electric motor or hydraulic motor installed on the front and rear beams 27 into front-rear movement of the movable unit 5.

[0043] The left and right sliding units 23 are provided to move the injection nozzle 42 in the left-right direction Y. In a plan view, the left and right sliding units 23 are positioned between a pair of left and right front and rear beams 27, 27. The left and right sliding units 23 move in the left-right direction Y on the slide rails 29, 29.

[0044] The left and right slide unit 23 includes a second movable base 41 as a slider supported by slide rails 29, 29 so as to be slidable in the left-right direction Y, an injection nozzle 42 attached to the second movable base 41 and moving integrally with the second movable base 41 in the left-right direction Y, a nozzle holder 43 that holds the injection nozzle 42, a second holder portion 57 of a supply pipe holder 55 (described later) which is fixed to the second movable base 41, and a second pipe 52 of a supply pipe 50 (described later) which is held by the second holder portion 57.

[0045] The second movable base 41 is supported by the first movable base 21 so as to move in the front-rear direction X, and supports the injection nozzle 42 so as to be movable in the left-right direction Y. In this embodiment, the second movable base 41 is a block-shaped member. The second movable base 41 has a pair of slide holes 41a, 41a formed therein, spaced apart in the front-rear direction X, corresponding to a pair of front-rear slide rails 29, 29, and these slide holes 41a, 41a are fitted onto the slide rails 29, 29.

[0046] A rod 32 of the left-right drive mechanism 22 is positioned to the side (to the right in this embodiment) of the second movable base 41, and this rod 32 is connected to the second movable base 41. As a result, the left-right slide unit 23 moves integrally with the movement of the rod 32 in the left-right direction Y. The second movable base 41 is movable in the left-right direction Y between, for example, a right end position Y1 located a few centimeters in the left-right direction Y from the right front-rear beam 27, and a left end position Y2 located a few centimeters in the left-right direction Y from the left front-rear beam 27. A cover may be installed to surround the second movable base 41.

[0047] The spray nozzle 42 is configured to be movable along the left-right direction Y, which is the width direction of the tar pan 105, relative to the tar pan 105, and sprays cleaning liquid F onto the tar pan 105. In this embodiment, the spray nozzle 42 is positioned above the second movable base 41, but it may also be positioned directly forward from the second movable base.

[0048] The injection nozzle 42 has a cylindrical body with a nozzle formed therein, and it injects a high-pressure fluid such as water from the nozzle in a cone-shaped jet. In this embodiment, the injection nozzle 42 is supported on the second movable base 41, while the scraper 63 is supported on the first movable base 21. As a result, the injection nozzle 42 can move in the left-right direction Y independently of the displacement of the scraper 63. In this embodiment, the injection nozzle 42 is positioned behind the front end position of the first movable base 21, and is located behind the tip portion 63a of the scraper 63, which is the part that scrapes the tar pan 105. The injection nozzle 42 may be directly fixed to the second movable base 41, but in this embodiment, it is supported on the second movable base 41 via a nozzle holder 43.

[0049] In this embodiment, the nozzle holder 43 is formed by combining multiple members, but it may also be composed of a single member.

[0050] As clearly shown in Figures 5 and 6, the nozzle holder 43 has a first portion 43a fixed to the second movable base 41, a second portion 43b fixed to the first portion 43a, a third portion 43c fixed to the second portion 43b, and a fourth portion 43d fixed to the third portion 43c and coupled to the injection nozzle 42.

[0051] In this embodiment, the first part 43a is a plate member formed in an L-shape in plan view and is fixed to, for example, the front surface of the second movable base 41. In this embodiment, the second part 43b is a flat plate member perpendicular to the left-right direction Y. An elongated slot is formed in either the first part 43a or the second part 43b in the front-rear direction X, and a round hole is formed in the other. The second part 43b is fixed to the first part 43a so that its position in the front-rear direction X can be changed by screw-connecting nuts to bolts inserted into these slots and round holes. In other words, the position of the injection nozzle 42 in the front-rear direction X can be changed relative to the second movable base 41.

[0052] In this embodiment, the third portion 43c is a flat plate member aligned with the second portion 43b. Viewed from the left-right direction Y, a pair of arc-shaped elongated holes are formed in either the second portion 43b or the third portion 43c, and a round hole is formed in the other. The third portion 43c is fixed to the second portion 43b so that its position can be changed around a horizontal axis extending in the left-right direction Y, by screw-connecting nuts to bolts inserted into these arc-shaped elongated holes and the round hole. In other words, the orientation of the injection nozzle 42 can be changed around a horizontal axis extending in the left-right direction Y relative to the second movable base 41. In this embodiment, the fourth portion 43d is a clamp member, which holds the outer circumference of the injection nozzle 42 and is fixed to the third portion 43c using fixing members such as bolts.

[0053] With the above configuration, the spray nozzle 42 can change its position in the front-to-back direction X and its orientation around a horizontal axis extending in the left-to-right direction Y relative to the first movable base 21 and the second movable base 41. A cleaning fluid F, for example, water (cooling medium), is supplied to the spray nozzle 42 through the supply pipe 50.

[0054] Referring to Figures 2 to 6, in this embodiment the supply pipe 50 is positioned above the second movable base 41, but it may also be positioned behind the second movable base 41.

[0055] The supply pipe 50 includes a first pipe 51 installed on the first movable base 21 and rising upward from the first movable base 21, a second pipe 52 installed on the second movable base 41 and rising upward from the second movable base 41, and a flexible pipe 53 connecting the first pipe 51 and the second pipe 52.

[0056] The first pipe 51 is positioned to the side of the left and right slide unit 23 (to the right in this embodiment), and is located, for example, near the left and right drive mechanism 22 (to the rear in this embodiment). The lower end (base end) of the first pipe 51 is connected to a cleaning fluid source (e.g., water supply) via a connecting pipe (not shown). A pressure pump for pressurizing the cleaning fluid F may be installed in the connecting pipe. In this embodiment, the first pipe 51 extends upward from the periphery of the left and right drive mechanism 22. The vertical length of the first pipe 51 is set according to the maximum amount of movement of the left and right slide unit 23 in the left and right direction Y. The upper end of the first pipe 51 is formed, for example, in a downward U shape, and the tip of the first pipe 51 is open downward. One end of the flexible pipe 53 is connected to the tip of the first pipe 51.

[0057] The flexible pipe 53 is a flexible member that deforms in accordance with the movement of the left and right slide units 23 in the left-right direction Y, thereby following the movement of the left and right slide units 23. The flexible pipe 53 is arranged to form an arc when, for example, the left and right slide units 23 are at their leftmost position Y2, which is furthest from the first pipe 51. The other end of the flexible pipe 53 is connected to the second pipe 52.

[0058] As described above, the second pipe 52 is also an element of the left and right slide unit 23. The second pipe 52 has a rigid upper portion 52a that forms one end of the second pipe 52 and is formed in a downward U shape, and a lower portion 52b that extends downward from the upper portion 52a and then extends forward to be connected to the injection nozzle 42.

[0059] One end of the upper portion 52a is connected to the other end of the flexible pipe 53. One end of the lower portion 52b is connected to the other end of the upper portion 52a. The lower portion 52b is a flexible pipe similar to the flexible pipe 53, and the other end of the lower portion 52b is connected to the injection nozzle 42. The lower portion 52b elastically deforms in accordance with the position adjustment of the injection nozzle 42 relative to the second movable base 41.

[0060] A supply pipe holder 55 is provided to hold the supply pipe 50 having the above configuration. The supply pipe holder 55 has a first holder portion 56 that supports the first pipe 51 of the supply pipe 50 and a second holder portion 57 that supports the second pipe 52.

[0061] In this embodiment, the first holder portion 56 is fixed to the stay 30 that supports the left and right drive mechanism 22 and extends in the vertical direction Z along the first pipe 51. The first holder portion 56 grips the first pipe 51 at two locations in the vertical direction Z. In this embodiment, the second holder portion 57 is fixed to the second movable base 41 and extends in the vertical direction Z along the upper portion 52a of the second pipe 52. The second holder portion 57 grips the upper portion 52a at two locations in the vertical direction Z. The second holder portion 57 does not hold the lower portion 52b of the second pipe 52 so as not to hinder the elastic deformation of the lower portion 52b.

[0062] Next, we will explain the configuration of the scraper unit 6.

[0063] The scraper unit 6 is supported by the first movable base 21 of the movable unit 5 and includes a portion that protrudes forward relative to a pair of front and rear beams 27, 27.

[0064] The scraper unit 6 includes a pair of left and right stays 61, 61 which are connected to the first movable base 21 of the movable unit 5, a support shaft 62 supported by the stays 61, 61, a scraper 63 supported by the support shaft 62, and a pair of upper and lower stoppers 64, 65 which define the range of movement of the scraper 63 around the support shaft 62.

[0065] In this embodiment, the stays 61, 61 are block-shaped members fixed to the lower front surfaces of a pair of left and right front and rear beams 27, 27. The stays 61, 61 only need to be fixed to the first movable base 21, and their specific positions are not limited. Each stay 61, 61 has a bearing hole 61a extending in the left-right direction Y, and both ends of the support shaft 62 are rotatably supported by these bearing holes 61a.

[0066] The support shaft 62 is positioned along the left-right direction Y. In this embodiment, the support shaft 62 is positioned below a pair of front and rear slide rails 29, 29. The support shaft 62 may be a round shaft as in this embodiment, or it may be a polygonal prism-shaped shaft.

[0067] The scraper 63 is movable in conjunction with the first movable base 21 in the front-rear direction X, and scrapes up the tar 200 on the tar pan 105 while moving in the direction towards the furnace opening 103 (forward) within the front-rear direction X. The scraper 63 is formed in a plate shape, and in this embodiment, it is formed in a "V" shape when viewed from the side. More specifically, when viewed from the side, the scraper 63 moves straight forward from the support shaft 62, then curves by several tens of degrees, and then extends in a straight line again.

[0068] In this embodiment, the scraper 63 is positioned in a region in the left-right direction Y that roughly coincides with the range of motion of the injection nozzle 42. Of the scraper 63, the tip portion 63a is responsible for scraping the tar pan 105 and the tar 200. The tip portion of the scraper 63, including the tip portion 63a, protrudes forward in a side view relative to the pair of front and rear beams 27, 27. The scraper 63 is supported on the first movable base 21 via a support shaft 62 and scrapes the material (tar 200) on the tar pan 105 while oscillating around the support shaft 62.

[0069] When the tar pan cleaner 1 is at its rear end position X1, the tip 63a of the scraper 63 is positioned above, for example, the conveyor 107 behind the tar pan 105. On the other hand, when the tar pan cleaner 1 is at its front end position X2, the tip 63a of the scraper 63 is positioned at the upper end of the tar pan 105 (narrow space 108) below the furnace lid 104. In this way, the scraper 63 is configured to reach below the furnace opening 103 (below the furnace lid 104) at the top of the tar pan 105.

[0070] The lower stopper 64, positioned on the lower side of a pair of upper and lower stoppers 64, 65, is provided to define the lower end position Z1 of the tip 63a of the scraper 63. The lower stopper 64 is provided adjacent to the support shaft 62. The lower stopper 64 is provided, for example, on each of the left and right pairs of front and rear beams 27, 27. The lower stopper 64 has a bolt that is screw-connected to a stay fixed to the corresponding front and rear beams 27, 27, and the lower end position Z1 around the support shaft 62 can be adjusted by adjusting the amount the bolt protrudes from the stay. The lower stopper 64 restricts the downward rotational movement of the scraper 63 by receiving the base end portion of the scraper 63.

[0071] The upper stopper 65 is positioned opposite the lower stopper 64 in the circumferential direction of the support shaft 62. The upper stopper 65 is provided, for example, on each of the left and right pairs of front and rear beams 27, 27. The upper stopper 65 has a bolt that is screw-connected to a stay fixed to the corresponding front and rear beams 27, 27, and the upper end position Z2 around the support shaft 62 can be adjusted by adjusting the amount the bolt protrudes from the stay. The upper stopper 65 restricts the upward rotational movement of the scraper 63 by receiving the base end portion of the scraper 63.

[0072] The tip 63a of the scraper 63 is at the same height as the lower end of the tar pan 105 at its lower end position Z1. Also, the tip 63a of the scraper 63 is at the same height as the upper end of the tar pan 105 at its upper end position Z2.

[0073] Next, we will describe the configuration for controlling the operation of the tar pan cleaner 1.

[0074] Figure 7 is a block diagram illustrating the configuration for controlling the tar pan cleaner 1. Referring to Figures 1 to 7, the tar pan cleaner 1 has a control unit 71. This control unit 71 may be, for example, a sequence circuit, a PLC (Programmable Logic Controller), or a computer including a CPU, ROM, and RAM.

[0075] The control unit 71 is electrically connected to the front-rear drive mechanism 4 and the left-right drive mechanism 22. More specifically, the control unit 71 is connected to an electric control valve, such as a solenoid valve, provided in the hydraulic circuit for driving the rod 16 of the front-rear drive mechanism 4, and to an electric control valve, such as a solenoid valve, provided in the hydraulic circuit for driving the rod 32 of the left-right drive mechanism 22. As a result, the control unit 71 can control the front-rear displacement of the movable unit 5 by the front-rear drive mechanism 4 and the left-right displacement of the left-right slide unit 23 by the left-right drive mechanism 22. In other words, the control unit 71 controls the movement of the injection nozzle 42 and scraper 63 in the front-rear direction X, and the movement of the injection nozzle 43 in the left-right direction Y.

[0076] Furthermore, the control unit 71 is connected to the injection nozzle valve 72, which is an electrically controlled valve such as an electromagnetic on / off valve located between the supply pipe 50 and the cleaning liquid source, and controls the on / off of the supply of cleaning liquid to the injection nozzle 42.

[0077] Furthermore, in this embodiment, the movable unit 5 is provided with a left-right position sensor 73 for detecting the position of the left-right slide unit 23 in the left-right direction Y. The left-right position sensor 73 only needs to be able to detect the right end position Y1 and the left end position Y2 of the left-right slide unit 23, and its specific configuration is not limited.

[0078] Furthermore, in this embodiment, the tar pan cleaner 1 is provided with a rear end position sensor 74 for detecting the position of the movable unit 5 (injection nozzle 42 and scraper 63) at the rear end position X1. The rear end position sensor 74 only needs to be able to detect the rear end position X1 of the movable unit 5, and its specific configuration is not limited. In this embodiment, the setting of the front end position X2 of the movable unit 5 (injection nozzle 42 and scraper 63) by the control unit 71 is performed by timer control. Specifically, after a certain period of time has elapsed since the movable unit 5 began to move forward due to the drive of the front / rear drive mechanism 4 from the rear end position X1, the control unit 71 stops the drive of the front / rear drive mechanism 4. As a result, the front end portion 63a of the movable unit 5 (scraper 63) reaches the front end position X2. In this way, by controlling the movement of the front end portion 63a of the scraper 63 to the front end position X2 using timer control, the operation of the scraper 63 can be made to correspond to the difference in the inlet and outlet of the coke oven 100.

[0079] Alternatively, the control unit 71 may control the movement of the left and right sliding unit 23 (injection nozzle 42) in the left-right direction Y, even if the left-right position sensor 73 is omitted. In this case, the control unit 71 controls the left-right drive mechanism 22 at regular intervals and controls the on / off of the supply of cleaning fluid F from the injection nozzle 42 by timer control or the like. Similarly, the control unit 71 may control the movement of the movable unit 5 (injection nozzle 42 and scraper 63) in the front-rear direction X, even if the rear end position sensor 74 is omitted. In this case, the control unit 71 moves the movable unit 5 (injection nozzle 42 and scraper 63) between the rear end position X1 and the front end position X2 by controlling the front-rear drive mechanism 4 by timer control or the like, which changes the drive mode of the front-rear drive mechanism 4 at regular intervals.

[0080] Next, an example of the cleaning operation of the tar pan 105 in the tar pan cleaner 1 will be described.

[0081] Figure 8 is a flowchart illustrating an example of the operation of Tarpan Cleaner 1. When explaining using the flowchart, other diagrams should also be referred to as appropriate.

[0082] Referring to the flowchart in Figure 8, in this embodiment, the cleaning operation of the tar pan 105 by the tar pan cleaner 1 starts when the movable unit 5 is at the rear end position X1 and the left and right sliding unit 23 is at the right end position Y1.

[0083] The control unit 71 first drives the forward / backward drive mechanism 4 to move the movable unit 5 forward (step S1). As a result, the tip 63a of the scraper 63 contacts the lower end of the tar pan 105 and moves upward around the support shaft 62 while scraping up the tar pan 105 as if tracing its surface. After a predetermined time has elapsed since the start of driving the forward / backward drive mechanism 4, the control unit 71 stops driving the forward / backward drive mechanism 4. As a result, the front end 63a of the scraper 63 stops at the front end position X2.

[0084] The control unit 71 causes the spray nozzle 42 to reciprocate in the left-right direction Y while spraying cleaning fluid F from the spray nozzle 42 at a timing before or after the scraper 63 comes into contact with the tar pan 105 (step S2). Step S2 may be performed before step S1, simultaneously with step S1, or at a time after the start of step S1.

[0085] In step S2, the control unit 71 opens the spray nozzle valve 72 to supply cleaning fluid F to the spray nozzle 42, and while detecting the position of the left and right slide unit 23 (spray nozzle 42) in the left-right direction Y with the left-right position sensor 73, drives the left-right drive mechanism 22 to move the left-right slide unit 23 to the left. When the control unit 71 detects that the left-right slide unit 23 has reached the left end position Y2, it changes the direction of movement of the rod 32 of the left-right drive mechanism 22, moving the left-right slide unit 23 (spray nozzle 42) to the right end position Y1. As a result, the spray nozzle 42 moves, for example, one back-and-forth motion in the left-right direction Y while spraying cleaning fluid F onto the tar pan 105. When the control unit 71 detects that the spray nozzle 42 has returned to the right end position Y1, it closes the spray nozzle valve 72 to stop the spraying of cleaning fluid F from the spray nozzle 42.

[0086] After the injection nozzle 42 has completed one back-and-forth movement in the left-right direction Y, the control unit 71 moves the scraper 63 by a predetermined amount in the direction away from the furnace opening 103 (rearward) (step S3). At this time, the control unit 71 moves the scraper 63 backward to an intermediate position between the front end position X2 and the rear end position X1, for example by driving the front-rear drive mechanism 4 for a predetermined time.

[0087] Next, the control unit 71 causes the spray nozzle 42 to perform a reciprocating motion in the left-right direction Y while spraying the cleaning liquid F from the spray nozzle 42 (step S4). The operation in step S4 is the same as in step S2. Thus, in this embodiment, the spray nozzle 42 is configured to move back and forth once in the left-right direction Y while spraying the cleaning liquid F, then move a predetermined amount backward, and then spray the cleaning liquid F again.

[0088] Next, the control unit 71 moves the rod 16 of the front-rear drive mechanism 4 backward, thereby moving the movable unit 5 (scraper 63) backward to the rear end position X1 (step S5). At this time, the control unit 71 drives the front-rear drive mechanism 4 until the rear end position sensor 74 detects that the movable unit 5 has reached the rear end position X1, and stops driving the front-rear drive mechanism 4 when this detection is made.

[0089] In this embodiment, the number of reciprocating movements of the spray nozzle 42 in the left-right direction Y during the cleaning operation described above may be one or three or more. Also, the cleaning liquid F may be continuously sprayed from the spray nozzle 42 during the cleaning operation with the tar pan cleaner 1.

[0090] As explained above, according to this embodiment, the scraper 63 moves upward from the bottom of the tar pan 105 to scrape up the tar 200 on the tar pan 105. Compared to the conventional configuration in which the scraper 63 moves downward on the tar pan 105 to scrape off the tar 200, with the configuration of this embodiment, the scraper 63 can more reliably catch on the tar 200 on the tar pan 105. Therefore, the problem of the scraper 63 simply tracing over the tar 200 and failing to scrape off the tar 200 is avoided. Thus, the tar 200 on the tar pan 105 can be more reliably scraped up by the scraper 63 and peeled off the tar pan 105, and the tar 200 can be more reliably removed from the tar pan 105.

[0091] Furthermore, according to this embodiment, the scraper 63 can scrape a wide area on the tar pan 105 by oscillating around the support shaft 62 along the left-right direction Y.

[0092] Furthermore, according to this embodiment, the furnace opening 103 is positioned above the top of the tar pan 105, and the scraper 63 is configured to reach below the furnace opening 103 (furnace lid 104) at the top of the tar pan 105 at its front end position X2. With this configuration, the tar 200 accumulated in the narrow space 108 between the furnace lid 104 and the tar pan 105 below the furnace opening 103 (furnace lid 104) can be scraped up with the scraper 63. In practice, it is difficult to swing the scraper 63 down into the narrow space 108 from above, whereas in this embodiment, the scraper 63 can be more reliably brought into the narrow space 108 from below.

[0093] Furthermore, according to this embodiment, the spray nozzle 42 is configured to be movable along the left-right direction Y relative to the tar pan 105 and sprays the cleaning liquid F onto the tar pan 105. With this configuration, the tar 200 on the tar pan 105 is scraped off with the scraper 63 and removed from the tar pan 105, while the high-pressure cleaning liquid F from the spray nozzle 42, for example, several MPa, reaches a wide area of ​​the tar pan 105, thereby peeling the tar 200 off the tar pan 105. This allows for more reliable removal of the tar 200 on the tar pan 105.

[0094] Furthermore, according to this embodiment, the spray nozzle 42 is configured to move independently of the displacement of the scraper 63. With this configuration, the scraper 63 can perform an operation (scraping operation) suitable for scraping up the tar 200, while the spray nozzle 42 can spray cleaning liquid F from a location suitable for removing the tar 200 on the tar pan 105. There is no need to forcibly link the scraping operation by the scraper 63 and the spraying position of the spray nozzle 42, and as a result, the tar removal effect by the scraper 63 and the spray nozzle 42 can be optimized. In particular, in this embodiment, the spray nozzle 42 is positioned behind the tip 63a of the scraper 63 that scrapes the tar pan 105. As a result, the spray nozzle 42 can supply a sufficiently large cone-shaped jet with sufficient liquid pressure to the tar pan 105 from a position appropriately separated from the tar pan 105.

[0095] Furthermore, according to this embodiment, the scraper 63 can be moved in the front-rear direction X by the first movable base 21, and the spray nozzle 42 can be moved in the left-right direction Y by the second movable base 41. With this configuration, the movement of the scraper 63 and the spray nozzle 42 in the front-rear direction X and the movement of the spray nozzle 42 in the left-right direction Y can be performed with a high degree of freedom from one another. Therefore, the tar removal effect by the cooperation of the scraper 63 and the spray nozzle 42 can be further enhanced.

[0096] Furthermore, according to this embodiment, since a flexible pipe 53 is provided between the first pipe 51 and the second pipe 52 of the supply pipe 50, the supply pipe 50 can be elastically deformed when the second movable base 41 (injection nozzle 42) moves in the left-right direction Y, and the supply operation of the cleaning liquid F by the supply pipe 50 can be continued smoothly.

[0097] Furthermore, according to this embodiment, the spray nozzle 42 is configured to spray the cleaning liquid F, move back and forth once in the left-right direction Y, then move a predetermined amount backward (away from the furnace opening 103), and then spray the cleaning liquid F again. In this way, by moving the scraper 63 backward while moving the cleaning liquid F back and forth multiple times, the jet from the spray nozzle 42 can be applied to a larger area on the tar pan 105, thereby removing the tar 200.

[0098] Embodiments of the present invention have been described above. However, the present invention is not limited to the embodiments described above. Various modifications are possible to the present invention as long as they are within the scope of the claims. [Industrial applicability]

[0099] The present invention can be widely applied as a tar pan cleaner. [Explanation of symbols]

[0100] 1 Tarpan Cleaner 21 1st movable base (movable base) 41 Second movable platform 42 Spray nozzles 50 Supply pipe 51 1st tube 52 2nd pipe 53 Flexible pipe 63 Scraper 100 coke ovens 101 hearth bottom 103 Furnace mouth 105 Tarpan 200 Tar (object) F Cleaning solution X Anteroposterior direction Y left / right direction

Claims

1. A tar pan cleaner for cleaning a sloping tar pan, which is positioned on the bottom side of a coke oven and whose height increases as it approaches the oven opening, A scraper configured to scrape the object on the tar pan while moving in the front-rear direction, which is a direction toward and away from the furnace opening, A spray nozzle is configured to be movable along the left-right direction, which is the width direction of the tar pan, and sprays cleaning liquid onto the tar pan, Equipped with, The injection nozzle is configured to be movable independently of the displacement of the scraper. A first movable platform for moving the scraper in the forward and backward direction, A second movable base is supported by the first movable base so as to move in the front-rear direction and supports the injection nozzle so as to be movable in the left-right direction, Furthermore, The scraper is supported on the first movable base via a support shaft extending along the left-right direction, and is displaced around the support shaft by moving in the front-rear direction while being supported by the tar pan. The aforementioned spray nozzle is restricted from rotating around the pivot shaft and moves in a linear reciprocating motion in the left-right direction, in a tar pan cleaner.

2. The system further comprises a supply pipe for supplying the cleaning liquid to the injection nozzle, The tar pan cleaner according to claim 1, wherein the supply pipe comprises a first pipe installed on the first movable base and rising upward from the first movable base, a second pipe installed on the second movable base and rising upward from the second movable base, and a flexible pipe connecting the first pipe and the second pipe.

3. The tar pan cleaner according to claim 1, wherein the spray nozzle is positioned at a location on the scraper that is located behind the portion that scrapes the tar pan.

4. The tar pan cleaner according to any one of claims 1 to 3, wherein the spray nozzle is configured to spray the cleaning liquid and move back and forth once in the left-right direction, then move a predetermined amount in the front-back direction away from the furnace opening, and then spray the cleaning liquid again.

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