Automatic furnace wall cleaning system

Abstract

An automatic furnace wall cleaning system (1) that is used during the operation stop period of a waste incineration furnace facility (2) having an incinerator (4), a first flow path, a second flow path, and a third flow path. The system (1) includes: a gantry (20) that can be lifted and lowered along the furnace wall of the first flow path and is horizontal; a rail (24) provided on the gantry (20); a cleaning device (21) that can move along the rail (24), sprays a spraying material onto the furnace wall to clean the furnace wall, takes pictures of the cleaning status with a camera device, and sucks up the coal dust generated in the imaging direction; a control device (29) that controls the lifting of the gantry (20), the movement of the cleaning device (21), and the above-mentioned spraying according to the photographed cleaning status of the furnace wall; a first suction device (30) that does not have a dust collection filter and discharges the sucked-up coal dust upward; and a second suction device (40) that is separately arranged separately from the first suction device (30) so as to generate an air flow flowing from the first flow path to the second flow path.

Description

Technical Field

[0001] The present invention relates to an automatic furnace wall cleaning system that automatically cleans the furnace walls of waste incinerators such as grate furnaces. Background Art

[0002] In waste incinerator equipment, the cleaning of the furnace walls of waste incinerators such as grate furnaces (hereinafter referred to as "incinerators") is carried out during the period when the equipment is stopped, in other words, during the non-operating period of the incinerator.

[0003] Moreover, generally, the cleaning of the furnace walls is carried out by workers entering the interior (inside the furnace) of the incinerator and manually operating the cleaning device themselves. As the cleaning device, a spraying device that sprays abrasive materials such as sand and dry ice onto the furnace walls to peel off slag or fly ash adhering to the wall surface is mainly used.

[0004] In the case where workers enter the inside of the incinerator to carry out the cleaning operation, the field of vision of the workers will be blocked by the flying coal dust during the operation. Therefore, for example, there is a technique of improving the field of vision by sucking the coal dust generated during the cleaning operation with a general suction device (equipped with a dust collection filter and a blower) (for example, Patent Document 1).

[0005] And there is also a technique (for example, Patent Document 2) in which one end of a conduit is provided on a manhole in the middle of the exhaust gas flow path of a non-operating first incinerator, and the other end of the conduit is connected to a second incinerator that is installed side by side with the first incinerator and is operating. Instead of installing a new suction device, the secondary air blower of the second incinerator is used to suck the coal dust from the first incinerator to the second incinerator, thereby improving the field of vision inside the first incinerator.

[0006] In an incinerator, the furnace wall where the boiler water pipes are arranged usually has a height of more than ten meters. Therefore, when cleaning the furnace wall, workers set up a scaffold inside the furnace to carry out the cleaning operation.

[0007] However, the high-altitude cleaning operation carried out by workers is accompanied by risks, so safety confirmation needs to be carried out frequently. And wearing dust-proof clothing and dust masks will easily cause fatigue, so it is difficult for workers to carry out the cleaning operation inside the furnace for a long time. Therefore, the construction period of the furnace wall cleaning operation tends to be prolonged.

[0008] In contrast, a technique has been developed in which workers remotely operate the cleaning device from the outside (outside the furnace) of the incinerator to carry out the cleaning operation (for example, Patent Document 3 or Patent Document 4). The cleaning device is a cleaning device in which a column (mast) fixed below the furnace and arranged along the furnace wall is installed on a liftable platform or a cleaning device lifted from above the furnace wall and installed on a liftable platform.

[0009] Prior art documents

[0010] Patent documents

[0011] Patent Document 1: Japanese Patent Laid-Open No. 2008-281332

[0012] Patent Document 2: Japanese Patent Laid-Open No. 2004-294051

[0013] Patent Document 3: Japanese Patent Laid-Open No. 2002-320937

[0014] Patent Document 4: Japanese Patent Laid-Open No. 2004-138258 Summary of the invention

[0015] Technical problem to be solved by the invention

[0016] In the technologies of Patent Document 3 or Patent Document 4, since the in-furnace cleaning operation is not performed by the staff but by the cleaning device automatically, the coal dust and slag generated during the cleaning operation directly settle by gravity.

[0017] However, in this way, lightweight coal dust and the like scattered along with the lifting and moving of the gantry will fly in front of the imaging device provided in the cleaning device, making it difficult to perform precise cleaning control. Therefore, it is conceivable to combine this cleaning device with the technologies such as Patent Document 1 or Patent Document 2.

[0018] However, when applying a general suction device having a dust collection filter and a blower such as Patent Document 1 to the cleaning device of Patent Document 3 or Patent Document 4, it is necessary to install the suction device and the cleaning device together on a liftable gantry, or install the suction device on the ground inside or outside the furnace, etc., and connect a flexible long pipe for sucking coal dust from the suction device to the cleaning device.

[0019] Here, in order to shorten the construction period of the cleaning operation, the replacement frequency of the dust collection filter provided in the suction device is preferably low. In order to reduce the replacement frequency, it is necessary to enlarge the dust collection filter. However, if the dust collection filter is enlarged, the weight will increase. Therefore, it is not very ideal to arrange the suction device and the cleaning device together on a liftable gantry from the viewpoint of power consumption for lifting drive.

[0020] On the other hand, when the suction device is installed on the ground or the like and the above-mentioned flexible long pipe is used, a large suction force is required. Therefore, the suction device needs to be equipped with a large blower. A large blower consumes a large amount of power, so it is also not very ideal from the viewpoint of power consumption.

[0021] Moreover, when applying the technology of Patent Document 2, which features not setting a new attracting device, to the cleaning device of Patent Document 3 or Patent Document 4, it is necessary to have two incinerators, and it is necessary to provide a branch duct or the like between the non-operating incinerator and the operating incinerator, which may lead to an increase in the cost of the device. Therefore, from the perspective of manufacturing cost, it is not very ideal.

[0022] Accordingly, an object of the present invention is to provide an automatic furnace wall cleaning system that can be used during the operation stop period of a waste incinerator facility, can shorten the cleaning operation period, and can perform the cleaning operation economically and precisely.

[0023] Means for Solving the Technical Problem

[0024] The automatic furnace wall cleaning system of the present invention can be used during the operation stop period of a waste incinerator facility, and the waste incinerator facility includes: an incinerator for incinerating waste; a first flow path extending vertically upward from the incinerator, which is a flow path for exhaust gas discharged from the incinerator; a second flow path connected to the upper end of the first flow path and extending downward from the upper end; and a third flow path connected to the lower end of the second flow path and extending upward from the lower end.

[0025] The automatic furnace wall cleaning system of the present invention includes:

[0026] a gantry that can be lifted and lowered along the furnace wall around the first flow path and is horizontally arranged;

[0027] a rail provided on the gantry and extending along the end of the gantry;

[0028] a cleaning device that can move along the rail through a cleaning device driving unit, spray a spraying material from a spray port of a nozzle onto the furnace wall to clean the furnace wall, photograph the cleaning condition with a camera device, and suck coal dust generated in the photographing direction through a suction nozzle;

[0029] a control device that controls the lifting of the gantry, the movement of the cleaning device along the rail, and the spraying according to the cleaning condition photographed by the camera device;

[0030] a first attracting device provided on the gantry or the cleaning device, at least including a blower and not having a dust collecting filter, and discharging the coal dust sucked from the suction nozzle upward through the blower; and

[0031] a second attracting device that is separately and detachably arranged around the furnace wall of the second flow path or the third flow path separately from the first attracting device, so as to generate an air flow flowing from the first flow path to the second flow path.

[0032] Advantages of the Invention

[0033] According to the automatic furnace wall cleaning system of the present invention, the first suction device is different from general suction devices and does not have a dust collection filter. Therefore, the first suction device is lighter than general suction devices, and since there is no need to replace the dust collection filter, the cleaning operation period can be shortened.

[0034] Moreover, the first suction device is provided on a liftable platform or cleaning device. Therefore, compared with the case where it is installed inside the furnace or on the ground outside the furnace, etc., the first suction device can be equipped with a small blower. Therefore, in addition to not requiring a dust collection filter, the first suction device also does not require a large blower, so it is small and lightweight. Therefore, from the viewpoints of the power consumption for lifting and driving the platform and the manufacturing cost of the first suction device, the economy is excellent.

[0035] Furthermore, the second suction device is detachable and can be implemented in a waste incinerator facility including one incinerator. Therefore, there is no need for two incinerators and a branch duct connecting the two incinerators. Therefore, from the viewpoint of the manufacturing cost of the automatic furnace wall cleaning system, the economy is excellent.

[0036] Moreover, the first suction device discharges the coal dust upward to move the coal dust sucked by the suction nozzle during the cleaning of the furnace wall by the cleaning device from the first flow path to the second flow path separated by the furnace wall.

[0037] Therefore, by the combined force of the kinetic energy of the discharge based on the first suction device and the air flow based on the second suction device, that is, by increasing the resultant vector of the upward kinetic energy, relatively light coal dust that does not easily fall in front of the imaging device provided in the cleaning device, in other words, coal dust generated when the cleaning device cleans the furnace wall and obstructs clear imaging by blocking between the imaging device provided in the cleaning device and the furnace wall, can be easily moved from the first flow path to the second flow path, and thus can be separated from the first flow path. In the second flow path, the flow direction of the air flow based on the second suction device is downward. Therefore, the possibility of the coal dust etc. temporarily moved to the second flow path returning to the first flow path is extremely low.

[0038] Therefore, the problem of coal dust etc. returning to fly in front of the imaging device can be reduced. Therefore, based on the clear imaging by the imaging device, the cleaning device can automatically perform precise cleaning. And since this cleaning operation is not a cleaning operation in which workers enter the furnace, the cleaning operation period can be shortened.

[0039] As described above, according to the automatic furnace wall cleaning system of the present invention, the cleaning operation period can be shortened, and the cleaning operation can be carried out economically and precisely. Brief Description of the Drawings

[0040] Figure 1This is a schematic configuration diagram showing the automatic furnace wall cleaning system 1 according to the embodiment together with the waste incineration furnace equipment 2 .

[0041] Figure 2 For Figure 1 This is a schematic structural diagram of a main portion of the automatic furnace wall cleaning system 1 according to the embodiment, as viewed along arrow A.

[0042] Figure 3 For Figure 2 The schematic configuration diagram of the main part of the automatic furnace wall cleaning system 1 according to the embodiment is viewed along the arrow B.

[0043] Figure 4 This is a schematic structural diagram of a cleaning device 21 ′ using a robot arm.

[0044] Figure 5 FIG. 3 is a schematic structural diagram of the first suction device 30 ′.

[0045] Figure 6 2 is a schematic structural diagram of the first suction device 30". DETAILED DESCRIPTION

[0046] Below, reference Figures 1 to 6 , the automatic furnace wall cleaning system of the present invention is described. The structures shown below are merely examples and are not intended to exclude the application of various modifications or technologies not explicitly described. Regarding the various structures shown in the embodiments of the present invention, various modifications can be implemented without departing from the scope of the present invention. Moreover, regarding these various structures, in addition to the necessary structural elements of the present invention, they can be selected or discarded, or appropriately combined as needed.

[0047] Figure 1 This is a schematic diagram showing the automatic furnace wall cleaning system 1 of the embodiment together with the waste incinerator equipment 2. As will be described later, in the waste incinerator equipment 2, the platform 20 of the automatic furnace wall cleaning system 1 can be raised and lowered, and the cleaning device 21 can move on the rails 24 of the platform 20. Figure 1 Indicates the state of the automatic furnace wall cleaning system 1 at a certain point in time (a certain moment). Figure 2 At this point in time Figure 1 The arrow A shows the schematic structure of the main part of the automatic furnace wall cleaning system 1. Figure 3 At this point in time Figure 2 The arrow B shows a schematic structural diagram of the main part of the automatic furnace wall cleaning system 1.

[0048] Figures 1 to 3In [the figure], an orthogonal coordinate system composed of the X-axis, Y-axis, and Z-axis is shown and explained. The X-axis is in the horizontal direction, the Y-axis is in the vertical direction, and the Z-axis is in a direction orthogonal to both the X-axis and the Y-axis. Additionally, the arrow direction of the Y-axis is in the vertical direction and upward.

[0049] As Figure 1 shown, the automatic furnace wall cleaning system 1 is a system that can be used during the operation stop period of the waste incinerator equipment 2, and this waste incinerator equipment 2 includes: an incinerator 3 that incinerates waste; a first flow path (1 pass), which extends vertically upward from the incinerator 3 and is a flow path for the exhaust gas discharged from the incinerator 3; a second flow path (2 passes), which is connected to the upper end of the first flow path (1 pass) and extends downward from this upper end; and a third flow path (3 passes), which is connected to the lower end of the second flow path (2 passes) and extends upward from this lower end.

[0050] Here, the "pass" in "1 pass", "2 passes", and "3 passes" of each flow path 8 (the first flow path, the second flow path, and the third flow path) means "pass" in English.

[0051] In addition to the above structure, the waste incinerator equipment 2 also includes: an economiser 9 that performs heat exchange on the heat of the exhaust gas passing through the third flow path (3 passes); a desuperheater tower 10 that cools the exhaust gas subjected to this heat exchange; a dust removal device 11 (bag filter) that removes the coal dust of the cooled exhaust gas; and a chimney 12 that discharges the exhausted gas to the atmosphere.

[0052] Moreover, the waste incinerator equipment 2 is equipped with a suction fan 13 downstream of the dust removal device 11 and upstream of the chimney 12. During the operation of the waste incinerator equipment 2, by operating the suction fan 13, an air flow is generated that flows from the first flow path (1 pass) to the chimney 12. During the operation stop period of the waste incinerator equipment 2, that is, during the non-operation period of the incinerator 3, the suction fan 13 stops, so this air flow is not generated.

[0053] The incinerator 3 can be any type of incinerator, and a grate furnace is exemplified in Figure 1 . Therefore, the incinerator 3 includes: a hopper 5 that stores waste; a feeder 6 that pushes out the waste stored in the hopper 5 from below the hopper 5; a grate 4 that burns the waste pushed out by the feeder 6 while conveying it; and an ash chute 7 that discharges the residue burned on the grate 4.

[0054] In addition, for the sake of convenience of explanation here, the grate 4 refers to the general term for the drying section, the combustion section, and the afterburning section where a plurality of grates (grate bars) are respectively arranged. Moreover, since the incinerator 3 is hermetically connected to the furnace wall 8B around the first flow path (1 pass), during the operation of the waste incinerator equipment 2, by operating the exhaust fan 13, the inside of the incinerator 3 is sucked and becomes a negative pressure.

[0055] An access hole 8A is provided in the furnace wall 8B around the connecting portion of the second flow path (2 passes), the third flow path (3 passes), or the second flow path (2 passes) and the third flow path (3 passes) as an inspection opening for allowing workers to enter the inside from the outside of the furnace wall 8B. Also, an access hole 7A is provided on the wall surface of the ash chute 7 near the afterburning section of the incinerator 3 as an inspection opening for allowing workers to enter the inside (the furnace interior) from the outside (outside the furnace) of the incinerator 3. Doors are provided on both the access hole 7A and the access hole 8A, and during the operation of the waste incinerator equipment 2, these doors are hermetically closed.

[0056] In addition, in the waste incinerator equipment 2 equipped with a boiler, a boiler tube group for heat-exchanging the heat of the exhaust gas is arranged on the furnace wall 8B around the first flow path (1 pass), the second flow path (2 passes), and the third flow path (3 passes).

[0057] The furnace wall 8B is a cylindrical structure having a substantially quadrilateral cross-section on the plane formed by the X-axis and the Z-axis, and the first flow path (1 pass), the second flow path (2 passes), and the third flow path (3 passes) are hermetically connected through the corresponding furnace walls 8B.

[0058] Regarding the automatic furnace wall cleaning system 1, it can be set as a system that uses columns fixed to the working floor below the furnace interior to lift the gantry 20 as in Patent Document 3, or it can be set as a system that hoists the gantry 20 from above the incinerator 3 to lift it as in Patent Document 4. Also, the automatic furnace wall cleaning system 1 can be different from Patent Document 3 or Patent Document 4 and can be set as a system that mounts the gantry on a drone (such as a flying drone) capable of stably lifting and moving and lifts the gantry together with the drone.

[0059] Here, an example of the system using columns fixed to the working floor is described.

[0060] Figure 1 The working floor 22A is a scaffolding, which is arranged on the grate 4 and is a working place for workers to assemble the columns 22 or the gantry 20, etc. The working floor 22A is assembled and formed by combining a plurality of plates having a length and width that can pass through the access hole 7A. The grate 4 may not be horizontal. For example, as Figure 1As shown, there is a case where it is inclined in the Y-axis direction. Therefore, the feet of the support work floor 22A are appropriately set so that the work floor 22A is set to be horizontal. From the viewpoint of the safety of the staff or improving the work efficiency of the above assembly, the work floor 22A is preferably a floor that covers most of the grate 4, that is, a floor (a whole-surface floor) configured to substantially cover the entire surfaces of the drying section, the combustion section, and the post-combustion section.

[0061] As Figures 1 to 3 shown, two columns 22, that is, a pair, are provided and fixed on the work floor 22A. The two columns 22 are of an assembled type. By combining a plurality of columnar members having a length and width that can pass through the manhole 7A, each becomes a single column and is vertically arranged along the Y-axis direction (vertical direction).

[0062] One end of the columnar column 22 is fixed to the work floor 22A, and the other end is located near the uppermost part (near the top) in the Y-axis direction of the first flow path (1 pass). In order to prevent the column 22 from shaking significantly, an anti-shaking device of Patent Document 3 can be provided near the other end.

[0063] A rack (a plate-shaped or rod-shaped gear) is formed on the column 22. On the other hand, pinions (circular gears) are respectively arranged at both ends of the gantry drive shaft 23A provided on the gantry 20 described later, and the column 22 and the gantry drive shaft 23A are arranged so that these racks and pinions are engaged. Moreover, the gantry drive device 23 uses the central axis of the gantry drive shaft 23A as a rotation axis to rotate the gantry drive shaft 23A to rotate the pinions, whereby the gantry 20 can be lifted and lowered. This mechanism is a so-called "rack and pinion" mechanism.

[0064] Regarding the structure for lifting and lowering the gantry 20 using the work floor 22A, the column 22, and the "rack and pinion" mechanism, for example, the product name "Safety Stage" of Taiping Electric Co., Ltd. can be adopted.

[0065] Moreover, the automatic furnace wall cleaning system 1 includes: a gantry 20 that can be lifted and lowered along the furnace wall 8B around the first flow path (1 pass) and is horizontally arranged; and a track 24 that is provided on the gantry 20 and extends along the end of the gantry 20.

[0066] As Figure 2As shown, when observing the plane formed by the X-axis and the Z-axis from the top of the first flow path (1st pass), the gantry 20 includes: a frame portion 20A having the same center as the furnace wall 8B and an outer periphery with a shape similar to that of the furnace wall 8B; a through hole 20D having the same center as the frame portion 20A and an outer periphery with a shape similar to that of the frame portion 20A, and penetrating through the inside of the frame portion; a linear vertical member 20B disposed inside the through hole 20D and having both ends connected to the inner periphery of the frame portion 20A (corresponding to the outer periphery of the through hole 20D) along the X-axis; and a linear horizontal member 20C disposed inside the through hole 20D and having both ends connected to the inner periphery of the frame portion 20A along the Z-axis.

[0067] A plurality of vertical members 20B and horizontal members 20C are arranged in the through hole 20D to strengthen the frame portion 20A, and as will be described later, they serve as support members when fixing the gantry driving device 23 or the control device 29, etc. to the gantry 20.

[0068] As Figure 2 shown, a plurality of vertical members 20B and horizontal members 20C are provided in a grid pattern. The intervals between the plurality of vertical members 20B are equal to each other, and the intervals between the plurality of horizontal members 20C are equal to each other. The space surrounded by two adjacent vertical members 20B and two adjacent horizontal members 20C has a size that allows the column 22 to pass through without contacting the vertical members 20B and the horizontal members 20C.

[0069] A pair of columns 22 are arranged in the through hole 20D of the gantry 20 so as not to contact the vertical members 20B and the horizontal members 20C. Here, the two columns 22 are arranged in the Z-axis direction.

[0070] Since the gantry 20 includes the through hole 20D in which a plurality of vertical members 20B and horizontal members 20C are arranged in a grid pattern, the strength of the frame portion 20A can be ensured by the vertical members 20B and the horizontal members 20C, and it is lighter in weight compared to the case where the through hole 20D is not provided.

[0071] Since the staff does not need to ride on the gantry 20, the frame portion 20A only needs to have a width capable of providing the track 24 described later. Therefore, within the range allowed by various conditions such as strength, the through hole 20D is formed as large as possible, whereby the gantry 20 is lighter in weight, and thus the power consumption required for the lifting of the gantry 20 can be further reduced.

[0072] The gantry driving device 23 is disposed near the center of the gantry 20 and fixed to the vertical member 20B or the horizontal member 20C.

[0073] The first attracting device 30 described later (refer to

[0098] -

[0101] ) can be mounted on the cleaning device 21 (or the cleaning device 21') described later (refer to

[0089] -

[0092] ). As shown here Figure 2An example of being disposed on the gantry 20 as shown. The first suction device 30 is disposed at a position closer to the arrow direction side of the X axis than the gantry drive device 23, so that the discharge port 30A of the first suction device 30 is located at a position close to the connection portion of the first flow path (1 pass) and the second flow path (2 passes), and the discharge port 30A is oriented toward the arrow direction side of the X axis (and the arrow direction side of the Y axis) and fixed to the vertical member 20B or the horizontal member 20C.

[0074] The control device 29 (described later, refer to

[0116] -

[0119] ) is a device for controlling the gantry drive device 23, the first suction device 30, and the cleaning device 21. Therefore, it is disposed near the gantry drive device 23 and the first suction device 30 in such a way that the length of the control wiring is short, and fixed to the vertical member 20B or the horizontal member 20C.

[0075] In addition, when fixing the gantry drive device 23, the first suction device 30, and the control device 29 to the vertical member 20B or the horizontal member 20C, in order to stably fix these devices, it is preferable to place them on at least 2 vertical members 20B, on at least 2 horizontal members 20C, or on at least 1 vertical member 20B and at least 1 horizontal member 20C and then fix them.

[0076] As Figure 2 shown, a track 24 is provided on the substantially quadrilateral frame portion 20A of the gantry 20. Regarding the track 24, on the frame portion 20A of the quadrilateral corresponding to a specific one of the four sides, one end 24A and the other end 24B are disposed adjacent to each other, and extend from one end 24A through the other three sides different from the specific side to the other end 24B. In other words, a C-shaped track 24 is provided, which, when viewed from the top, is C-shaped.

[0077] The track 24 is not a circular track without gaps, but a C-shaped track with a gap in a part. Therefore, the cleaning device 21 cannot completely go around the track 24, but can reciprocate between one end 24A and the other end 24B.

[0078] Since the track 24 is formed in such a way that the cleaning device 21 cannot go around the frame portion 20A completely, the length of the wiring etc. (control wiring (not shown), the flexible first suction tube 27A connected to the cleaning device 21 and the first suction device 30, etc.) connected between the control device 29, the first suction device 30, or the cleaning device 21 provided on the gantry 20 can be set to a necessary and minimum length, which is excellent from an economic point of view.

[0079] In addition, if the cleaning device 21 is configured to be able to go around the frame portion 20A more than once, the wiring will be wound around the column 22, the control device 29 provided on the gantry 20, the first suction device 30, or the gantry drive device 23, and there is a concern that these devices or the wiring may malfunction. However, in the automatic furnace wall cleaning system 1, since the track 24 is formed in such a way that the cleaning device 21 cannot go around the frame portion 20A once, there is no concern about this malfunction.

[0080] Regarding the track 24, as long as the cleaning device 21 cannot go around the frame portion 20A once, it is also possible to form a circular track without a notch, and at positions corresponding to one end 24A and the other end 24B, for example, wheel stops that block the movement of the cleaning device 21 are provided.

[0081] The track 24 can be a rail-shaped track such as a tram or a monorail, or can be a track in the form of a concave guide rail formed on the frame portion 20A. Therefore, the cleaning device drive unit 28 of the cleaning device 21 is provided with a moving mechanism such as wheels corresponding to the shape of the track 24.

[0082] The cleaning device 21 is a device that can move along the track 24 through the cleaning device drive unit 28, spray the spraying material from the spray port 25A of the nozzle 25 to clean the furnace wall 8B, photograph the cleaning condition with the imaging device 26 (for example, a camera), and suck up the coal dust generated in the imaging direction through the suction nozzle 27.

[0083] The cleaning device 21 is configured such that at least the cleaning device drive unit 28, the nozzle 25, the suction nozzle 27, and the imaging device 26 are unitized into one body.

[0084] As described above, when the first suction device 30 is not fixed to the gantry 20 but is mounted on the cleaning device drive unit 28 and can move, the cleaning device 21 includes the first suction device 30 and is unitized into one body.

[0085] Figures 1 to 3 In the cleaning device 21, a frame (not labeled) is provided on the cleaning device drive unit 28, and on this frame, the nozzle 25, the suction nozzle 27, and the imaging device 26 are arranged in this order in the direction of the Y-axis arrow (upward). The nozzle 25 and the suction nozzle 27 are fixed horizontally toward the furnace wall 8B, and the suction nozzle 27 is formed shorter than the nozzle 25.

[0086] In addition, one end of the flexible spraying material supply pipe 25B shown in Figure 1 and Figure 3 is connected to the nozzle 25. As shown in Figure 1 , the other end of the spraying material supply pipe 25B is connected to the spraying material supply device 25C arranged outside the furnace through the manhole 7A. The spraying material supply device 25C is a device that supplies the spraying material to the cleaning device 21.

[0087] The spraying material supply pipe 25B is not inserted into the through hole 20D of the gantry 20, but as shown in Figure 3 shown, on the surface of the housing (not labeled) of the cleaning device 21 where the nozzle 25 is provided, it is provided in the same direction as the nozzle 25 and is arranged outside the frame portion 20A of the gantry 20, that is, between the frame portion 20A and the furnace wall 8B. Therefore, the spraying material supply pipe 25B droops from the cleaning device 21 to the outside of the gantry 20, and it is easy to follow the movement of the cleaning device 21, so that the cleaning operation can be smoothly carried out.

[0088] The spraying material is usually a solid such as sand or dry ice. However, it is not limited to these solids here, and it can also be a gas such as air or a liquid such as water.

[0089] Here, in addition to the cleaning device 21 where the positions of the nozzle 25, the suction nozzle 27 and the imaging device 26 are fixed as shown in Figures 1 to 3 shown, it can also be a device (cleaning device 21') whose position can be moved by the robotic arm 50 as shown in Figure 4 shown.

[0090] The robotic arm 50 includes: an arm portion 51 that is configured to be bendable at the joint portion; and a base portion 52 that is provided on the cleaning device drive portion 28 and supports the base end portion of the arm portion 51 to be rotatable. Moreover, a nozzle 25, an imaging device 26 and a suction nozzle 27 are provided on the front end portion 53 of the arm portion 51.

[0091] The control device 29 controls the robotic arm 50 to bend or extend the joint portion of the arm portion 51, so that the position of the front end portion 53 relative to the cleaning device drive portion 28 in the vertical direction (Y-axis direction) and the horizontal direction (X-axis direction) can be changed. And the control device 29 controls the robotic arm 50 to rotate the front end portion 53 in the vertical direction, so that the emission angle of the ejection port 25A of the nozzle 25 can be changed.

[0092] Therefore, compared with the cleaning device 21, the cleaning device 21' can keep the distance between the nozzle 25 and the furnace wall 8B at a specified distance, and can appropriately change the angle at which the spraying material contacts the furnace wall 8B, so that more precise cleaning control can be performed.

[0093] The automatic furnace wall cleaning system 1 includes: a first suction device 30 that is provided on the gantry 20 or the cleaning device 21, at least includes a blower 32 and does not have a dust collection filter, and discharges the coal dust sucked from the suction nozzle 27 upward through the blower 32; and a second suction device 40 that is separately and detachably arranged around the furnace wall 8B of the second flow path (2 passes) or the third flow path (3 passes) separately from the first suction device 30, so as to generate an air flow flowing from the first flow path (1 pass) to the second flow path (2 passes).

[0094] If the exhaust fan 13 operates during non-operation, the components contained in the exhaust gas may have an adverse effect on the dust collection device 11 (bag filter). Therefore, the exhaust fan 13 is not operated here, and the second suction device 40 is provided.

[0095] The second suction device 40 is connected to the flexible second suction pipe 40A that is hermetically connected by opening the door of the manhole 8A, and is detachably attached to the furnace wall 8B around the second flow path (2 passes) or the third flow path (3 passes).

[0096] Unlike the first suction device 30, the second suction device 40 is provided with a dust collection filter in addition to the blower to prevent the coal dust containing harmful substances in the furnace from leaking outside the furnace.

[0097] The air flow generated by the second suction device 40 only needs to be such that the fine and light coal dust generated during the cleaning operation is moved to the second flow path (2 passes). Therefore, compared with the case where the same suction device is arranged at a position more downstream than the third flow path (3 passes), the second suction device 40 can be provided with a small-sized and low-attraction blower, and thus is excellent from the economic point of view.

[0098] The first suction device 30 can adopt the following structure: a blower is accommodated in a frame having an outlet 30A, and a flexible first suction pipe 27A is connected to the frame and the suction nozzle 27. The first suction device 30 at least includes a blower, but unlike a general suction device, it deliberately does not have a dust collection filter for collecting coal dust. Therefore, the first suction device 30 can be manufactured at low cost and can be made lightweight.

[0099] Moreover, since the first suction device 30 is inexpensive, even if a failure occurs, it can be replaced at low cost. In other words, it can be discarded after use during or after the construction period of the ordered cleaning operation.

[0100] The first suction device 30 sucks coal dust from the suction nozzle 27 by the negative pressure generated by driving the blower, and sets the orientation of the outlet 30A so as to discharge the coal dust sucked from the suction nozzle 27 upward in the Y-axis direction above the cleaning device 21.

[0101] In the first suction device 30, as long as the discharge port 30A faces at least upward, by the combined force of the kinetic energy of the discharge based on the first suction device 30 and the air flow based on the second suction device 40, in other words, by increasing the resultant vector of the upward kinetic energy, relatively light coal dust and the like that are not easily dropped and flutter in front of the imaging device 26 provided in the cleaning device 21 can be easily moved from the first flow path to the second flow path due to phenomena such as Brownian motion, and thus can be separated from the first flow path. Therefore, the discharge angle of the discharge port 30A of the first suction device 30 can be fixed upward.

[0102] Here, Figure 2 In the case where the cleaning device 21 moves on the track 24 and performs a cleaning operation near the first suction device 30, if the suction nozzle 27 of the cleaning device 21 sucks relatively large and heavy coal dust and slag in addition to minute and light coal dust and discharges them from the discharge port 30A, these relatively large and heavy coal dust and slag may drop in front of the imaging device 26.

[0103] However, the dropping of these relatively large and heavy coal dust in front of the imaging device 26 due to gravity is an instantaneous event and does not flutter in front of the imaging device 26 for a long time like minute and light coal dust, so it does not block imaging. Therefore, even if these relatively large and heavy coal dust and slag drop in front of the imaging device 26, it will not affect the performance of the automatic cleaning operation performed by the cleaning device 21.

[0104] On the other hand, through the first suction device 30 and the second suction device 40, minute and light coal dust generated during the cleaning operation can be easily moved from the first flow path (one pass) to another area separated by the furnace wall, that is, the second flow path (two passes).

[0105] Therefore, the automatic furnace wall cleaning system 1 can perform a precise cleaning operation.

[0106] As described above, the first suction device 30 still has an effect when the angle of the discharge port 30A is fixed upward. However, the position (height) of the first suction device 30 in the vertical direction (Y-axis direction) changes with the lifting of the gantry 20. Therefore, a structure that can move minute and light coal dust from the first flow path (one pass) to the second flow path (two passes) more effectively is preferably adopted. Specifically, a structure that changes the angle of the discharge port 30A according to the vertical position of the gantry 20. For example, it is preferable that, regardless of the vertical position of the gantry 20, as shown by the dotted arrow in Figure 1 the coal dust sucked by the first suction device 30 is discharged toward the connection part between the first flow path (one pass) and the second flow path (two passes).

[0107] Therefore, an example of the first suction device having a function of adjusting the vertical angle of the discharge port 30A according to the vertical position of the gantry 20 will be described below ( Figure 5 the first suction device 30' and Figure 6 the first suction device 30").

[0108] Figure 5 FIG. is a schematic structural diagram of the first suction device 30'.

[0109] The suction device 30' includes a frame 31 connected to the other end of the first suction pipe 27A and a blower 32 accommodated and fixed in the frame 31. A discharge port 30A is provided at one end of the frame 31.

[0110] The frame 31 is mounted on the upper surface of the fixed table 33 and is mounted so as to be rotatable about the end edge on the side opposite to the discharge port 30A. By adjusting the rotation angle of the frame 31 relative to the fixed table 33, the orientation of the discharge port 30A can be adjusted.

[0111] With the lifting drive of the gantry 20, the control device 29 controls the rotation angle of the frame 31 relative to the fixed table 33 to adjust the discharge port 30A to discharge coal dust toward the connection portion of the first flow path (1st pass) and the second flow path (2nd pass). That is, even if the vertical position (height) of the gantry 20 changes, since the orientation of the discharge port 30A (the discharge direction of coal dust) can be changed to face the connection portion of the first flow path (1st pass) and the second flow path (2nd pass), fine and lightweight coal dust can be effectively sent into the second flow path (2nd pass).

[0112] Figure 6 FIG. is a schematic structural diagram of the first suction device 30".

[0113] The first suction device 30" is different from the first suction device 30' in the fixing method of the frame 31 and in having a nozzle 34, and other structures are the same as those of the first suction device 30'.

[0114] In the first suction device 30", the frame 31 is fixed to the fixed table 33 in a non-movable manner. And, one end of the nozzle 34 is rotatably mounted at one end of the frame 31, and a discharge port 30A is provided at the other end of the nozzle 34.

[0115] With the lifting drive of the gantry 20, the control device 29 controls the rotation angle of the nozzle 34 relative to the frame 31 to adjust the discharge port 30A to discharge coal dust toward the connection portion of the first flow path (1st pass) and the second flow path (2nd pass). Thus, the same effect as that of the first suction device 30' can be obtained.

[0116] The control device 29 controls the lifting of the gantry 20, the movement of the cleaning device 21 along the rail 24, and the spraying of the spraying material from the nozzle 25 according to the above-described cleaning state captured by the imaging device 26. Regarding the control device 29, artificial intelligence (AI) can be mounted and this control can be performed by the artificial intelligence.

[0117] Regarding the cleaning operation performed by the automatic furnace wall cleaning system 1, from the vicinity of the top of the furnace wall 8B in the first flow path (1 pass) to the working floor 22A below, it is basically fully automatically implemented by the control device 29. However, the cleaning operation can also be implemented by a worker outside the furnace controlling the control device 29 while performing remote monitoring via wireless communication or wired communication.

[0118] The control device 29 acquires the captured image data from the imaging device 26 provided in the cleaning device 21, and analyzes the image data to grasp the cleaning state of the furnace wall 8B. And the control device 29 controls the gantry driving device 23 to move the gantry 20 in the vertical direction (Y-axis direction) according to this state, and controls the cleaning device driving unit 28 provided in the cleaning device 21 to move the unitized cleaning device 21 on the rail 24, and controls the spraying material supply device 25C disposed outside the furnace to spray the spraying material from the nozzle 25 provided in the cleaning device 21.

[0119] The spraying control of the spraying material includes, for example, controlling the spraying intensity of the spraying material and controlling the start or stop of the spraying of the spraying material.

[0120] With the above structure, the automatic furnace wall cleaning system 1 can shorten the construction period of the cleaning operation, and can economically and precisely implement the automatic cleaning operation without manual intervention by workers.

[0121] In addition, in the cleaning devices 21, 21', a pneumatic pick can be installed instead of the nozzle 25, and the cleaning operation can be performed using the pneumatic pick. And after the cleaning operation, a blow nozzle can be installed instead of the nozzle 25, and the unshaped refractory can be sprayed onto the furnace wall through the blow nozzle to automatically perform the repair operation of the furnace wall 8B.

[0122] Symbol Explanation

[0123] 1 - Automatic furnace wall cleaning system, 2 - Waste incinerator equipment, 3 - Incinerator, 4 - Grate, 5 - Hopper, 6 - Feeder, 7 - Ash chute, 7A - Manhole, 8 - Flow path (first flow path, second flow path, third flow path), 8A - Manhole, 8B - Furnace wall, 9 - Economizer, 10 - Desuperheating tower, 11 - Dust removal device (bag filter), 12 - Chimney, 13 - Exhaust fan, 20 - Stand, 20A - Frame part, 20B - Vertical member, 20C - Horizontal member, 20D - Through hole, 21, 21’ - Cleaning device, 22 - Column, 22A - Working floor (flat floor), 23 - Stand driving device, 23A - Stand driving shaft, 24 - Track (example - rail), 24A - One end, 24B - The other end, 25 - Nozzle, 25A - Spray port, 25B - Spray material supply pipe (spray material supply hose), 25C - Spray material supply device, 26 - Camera device, 27 - Suction nozzle, 27A - First suction pipe (first suction hose), 28 - Cleaning device driving part, 29 - Control device, 30, 30’, 30” - First suction device, 30A - Discharge port, 31 - Frame, 32 - Blower, 33 - Fixed table, 34 - Discharge nozzle, 40 - Second suction device, 40A - Second suction pipe (second suction hose), 50 - Robot arm, 51 - Arm part, 52 - Base part, 53 - Front end part.

Claims

1. An automatic furnace wall cleaning system, which is used during the operation stop period of a waste incinerator device, and the waste incinerator device includes: An incinerator for incinerating waste; A first flow path extending vertically upward from the incinerator, which is a flow path for the exhaust gas discharged from the incinerator; A second flow path connected to the upper end of the first flow path and extending downward from the upper end; and A third flow path connected to the lower end of the second flow path and extending upward from the lower end, The automatic furnace wall cleaning system has: A gantry that can move up and down along the furnace wall around the first flow path and is horizontally arranged; A track provided on the gantry and extending along the end of the gantry; A cleaning device that can move along the track through a cleaning device driving part, spray a spraying material from a spray port of a nozzle onto the furnace wall to clean the furnace wall, photograph the cleaning condition with a camera device, and suck dust generated in the direction faced by the camera device through a suction nozzle; A control device that controls the lifting of the gantry, the movement of the cleaning device along the track, and the spraying according to the cleaning condition photographed by the camera device; A first suction device provided on the gantry or the cleaning device, at least having a blower and not having a dust collection filter, and discharging the dust sucked from the suction nozzle upward through the blower; And A second suction device, which is separately and detachably arranged around the furnace wall of the second flow path or the third flow path separately from the first suction device, so as to generate an air flow flowing from the first flow path to the second flow path.

2. The automatic furnace wall cleaning system according to claim 1, wherein The first suction device discharges the sucked dust toward the connection part between the first flow path and the second flow path.

3. The automatic furnace wall cleaning system according to claim 2, wherein The second suction device is airtightly provided in a manhole, and the manhole is arranged on the wall surface near the connection part between the second flow path and the third flow path.

4. The automatic furnace wall cleaning system according to claim 3, wherein The cleaning device further has a robotic arm with the nozzle at the front end, The control device controls the distance between the spray port and the furnace wall to be a specified distance by telescopically driving the robotic arm.

5. The automatic furnace wall cleaning system according to any one of claims 2 to 4, wherein The incinerator is a grate furnace, The automatic furnace wall cleaning system further has: A column arranged vertically on the grate of the grate furnace; A gantry driving device that makes the gantry move up and down along the column through a rack and pinion mechanism; and A spraying material supply device that conveys the spraying material to the cleaning device through a flexible spraying material supply pipe connected to the cleaning device, The gantry has a frame shape with a through hole for inserting the column, The track is a substantially C-shaped track with one end as the starting point and the other end as the ending point, so that the cleaning device cannot surround the frame, The spraying material supply pipe is arranged between the gantry and the furnace wall, The spraying material supply device is arranged outside the grate furnace of the furnace, The control device controls the gantry driving device to raise and lower the gantry.

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