Automatic furnace wall cleaning system

Abstract

An automatic furnace wall cleaning system (1) is used during operation stop of a waste incinerator facility (2) provided with an incinerator (4), a first flow path, a second flow path, and a third flow path. The system (1) is provided with: a horizontal gantry (20) capable of rising and falling along the furnace wall of the first flow path; a rail (24) provided on the gantry (20); a cleaning device (21) capable of moving along the rail (24), cleaning the furnace wall by spraying a spray material onto the furnace wall, capturing an image of the cleaning condition by an image capturing device, and attracting coal dust generated in the image capturing direction; a control device (29) for controlling the elevation of the gantry (20), the movement of the cleaning device (21), and the injection on the basis of the captured cleaning condition of the furnace wall; a first suction device (30) which is not provided with a dust collection filter screen and discharges the sucked coal dust upward; and a second suction device (40) disposed 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 invention relates to an automatic furnace wall cleaning system for automatically cleaning the furnace wall of a waste incineration furnace such as a grate furnace. Background Art

[0002] In a waste incineration furnace facility, cleaning of a furnace wall of a waste incineration furnace such as a grate furnace (hereinafter referred to as an "incinerator") is performed while the operation of the facility is stopped, in other words, while the incinerator is not in operation.

[0003] In general, the furnace wall is cleaned by workers entering the interior of the incinerator (furnace) and manually operating a cleaning device. As a cleaning device, a spray device that sprays abrasives (abrasives) such as sand and dry ice onto the furnace wall to remove slag and fly ash attached to the wall surface is mainly used.

[0004] When workers enter an incinerator to perform cleaning operations, coal dust flies around during the operation and blocks the workers' vision. Therefore, for example, there is a technology that uses a general suction device (equipped with a dust filter and a blower) to suck the coal dust generated during the cleaning operation to improve the worker's vision (for example, Patent Document 1).

[0005] Furthermore, there is a technology (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 in parallel with the first incinerator and is in operation. Instead of providing a new suction device, the secondary air blower of the second incinerator is used to suck coal dust from the first incinerator to the second incinerator, thereby improving the field of view inside the first incinerator.

[0006] In an incinerator, the furnace wall where the boiler water pipes are arranged is usually more than ten meters high. Therefore, when cleaning the furnace wall, the staff sets up scaffolding inside the furnace to carry out the cleaning operation.

[0007] However, the cleaning work at high places performed by workers is accompanied by danger, so frequent safety checks are required. In addition, wearing dust-proof clothing and dust masks will easily cause fatigue, so it is difficult for workers to perform cleaning work in the furnace for a long time. Therefore, the cleaning work of the furnace wall tends to take a long time.

[0008] In contrast, a technology has been developed in which a worker remotely operates a cleaning device from the outside of the incinerator (outside the furnace) to perform cleaning operations (for example, Patent Document 3 or Patent Document 4). The cleaning device is a cleaning device in which a column (mast) fixed to the bottom of the furnace and arranged along the furnace wall is installed on a liftable platform, or a cleaning device is suspended from above the furnace wall and installed on a liftable platform.

[0009] Previous technical literature

[0010] Patent Literature

[0011] Patent Document 1: Japanese Patent Application Publication No. 2008-281332

[0012] Patent Document 2: Japanese Patent Application Publication No. 2004-294051

[0013] Patent Document 3: Japanese Patent Application Publication No. 2002-320937

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

[0015] Technical issues to be solved by the invention

[0016] In the technology of Patent Document 3 or Patent Document 4, since the furnace cleaning operation is not performed by workers but is automatically performed by a cleaning device, the coal dust and slag generated during the cleaning operation are directly settled by gravity.

[0017] However, in this case, light coal dust and the like scattered along with the lifting and lowering movement of the platform will fly in front of the camera device provided in the cleaning device, making it difficult to perform precise cleaning control. Therefore, it is conceivable to combine the cleaning device with the technology of Patent Document 1 or Patent Document 2.

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

[0019] Here, in order to shorten the duration of the cleaning operation, the dust filter provided by the suction device is preferably replaced at a lower frequency. In order to reduce the replacement frequency, the dust filter needs to be enlarged. However, if the dust filter is enlarged, the weight will increase. Therefore, it is not ideal to arrange the suction device and the cleaning device together on a liftable platform from the perspective of power consumption for lifting and lowering drive.

[0020] On the other hand, when the suction device is placed on the ground or the like and the above-mentioned long bendable pipe is used, a large suction force is required, and therefore the suction device needs to be equipped with a large blower. A large blower consumes a lot of electricity, which is not ideal from the perspective of power consumption.

[0021] Furthermore, when the technology of Patent Document 2, which is characterized by not providing a new suction device, is applied to the cleaning device of Patent Document 3 or Patent Document 4, two incinerators must be provided, and a branch duct must be provided between the non-operating incinerator and the operating incinerator, which may increase the price of the device. Therefore, from the perspective of manufacturing cost, this is not ideal.

[0022] Therefore, an object of the present invention is to provide an automatic furnace wall cleaning system which can be used during a stoppage of a waste incinerator facility, can shorten the duration of cleaning work, and can perform cleaning work economically and accurately.

[0023] Means for solving technical problems

[0024] The automatic furnace wall cleaning system of the present invention is used during the period when the operation of a waste incinerator device is stopped, and the waste incinerator device comprises: an incinerator for incinerating waste; a first flow path extending vertically upward from the incinerator, which is the flow path of 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.

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

[0026] A stand capable of being raised and lowered along the furnace wall surrounding the first flow path and arranged horizontally;

[0027] A track is disposed on the platform and extends along the end of the platform;

[0028] The cleaning device can move along the track through the cleaning device driving part, spray the spray material from the spray port of the nozzle to the furnace wall to clean the furnace wall, use the camera device to take pictures of the cleaning status, and use the suction nozzle to suck the coal dust generated in the shooting direction;

[0029] A control device controls the lifting and lowering of the platform, the movement of the cleaning device along the track, and the spraying according to the cleaning conditions photographed by the camera device;

[0030] A first suction device is installed on the stand or the cleaning device, and is provided with at least a blower and is not provided with a dust collecting filter, and the coal dust sucked from the suction nozzle is discharged upward by the blower; and

[0031] The second suction device is separately and detachably disposed on the furnace wall around the second flow path or the third flow path, separate from the first suction device, so as to generate an airflow from the first flow path to the second flow path.

[0032] Effects of the Invention

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

[0034] Furthermore, since the first suction device is provided on a raisable stand or cleaning device, the first suction device can be provided with a small blower compared to the case where the first suction device is provided on the ground inside or outside the furnace. Therefore, the first suction device does not require a dust collection filter and a large blower, and is therefore small and light. Therefore, the first suction device is economically excellent from the perspective of power consumption for the raisable drive stand and the perspective of the manufacturing cost of the first suction device.

[0035] Furthermore, the second suction device is detachable and can be implemented in a waste incinerator facility including one incinerator. Therefore, two incinerators and a branch duct connecting the two incinerators are not required, so the automatic furnace wall cleaning system has excellent economic efficiency from the perspective of manufacturing cost.

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

[0037] Therefore, by the combined force of the kinetic energy discharged by the first suction device and the airflow by the second suction device, that is, by increasing the synthetic vector of the kinetic energy directed upward, the relatively light coal dust and the like that does not easily fall and flies in front of the camera device of the cleaning device, in other words, the coal dust and the like that is generated when the cleaning device cleans the furnace wall and blocks the camera device of the cleaning device and the furnace wall and hinders clear photography, can be easily moved from the first flow path to the second flow path, thereby separating it from the first flow path. In the second flow path, the airflow by the second suction device flows downward, so the possibility of the coal dust and the like that temporarily moved to the second flow path returning to the first flow path is extremely low.

[0038] Therefore, the problem of coal dust and the like flying back in front of the camera device can be reduced, and the cleaning device can automatically perform precise cleaning based on the clear image taken by the camera device. Furthermore, since the cleaning operation is not performed by a worker entering the furnace, the duration of the cleaning operation can be shortened.

[0039] As described above, according to the automatic furnace wall cleaning system of the present invention, the duration of the cleaning work can be shortened, and the cleaning work can be performed economically and accurately. 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 facility 2 .

[0041] Figure 2 For Figure 1 A schematic configuration diagram of the main parts of the automatic furnace wall cleaning system 1 according to the embodiment is viewed along the 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 ′ to which a robot arm is applied.

[0044] Figure 5 It 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 only examples, and there is no intention to exclude the application of various deformations or technologies not explicitly stated. Regarding the various structures shown in the embodiments of the present invention, various deformations can be implemented within the scope of the main purpose. Moreover, regarding the various structures, in addition to the necessary structural elements of the present invention, they can be selected or appropriately combined as needed.

[0047] Figure 1 This is a schematic structural diagram showing the automatic furnace wall cleaning system 1 of the embodiment together with the waste incineration furnace equipment 2. As described later, in the waste incineration furnace equipment 2, the frame 20 of the automatic furnace wall cleaning system 1 can be raised and lowered, and the cleaning device 21 can move on the track 24 of the frame 20, so that Figure 1 Indicates the state of the automatic furnace wall cleaning system 1 at a certain point in time (a certain moment). Figure 2 For at this point in time Figure 1 The arrow A of FIG. 1 shows a schematic diagram of the main part of the automatic furnace wall cleaning system 1. Figure 3 For at this point in time Figure 2 The schematic structural diagram of the main parts of the automatic furnace wall cleaning system 1 is observed as shown in the arrow B.

[0048] Figures 1 to 3In the figure, an orthogonal coordinate system consisting of an X-axis, a Y-axis, and a Z-axis is illustrated and described. The X-axis is a horizontal direction, the Y-axis is a vertical direction, and the Z-axis is a direction orthogonal to both the X-axis and the Y-axis. In addition, the arrow direction of the Y-axis is a vertical direction and points upward.

[0049] like Figure 1 As shown, the automatic furnace wall cleaning system 1 is a system that can be used during the shutdown period of the waste incinerator equipment 2, and the waste incinerator equipment 2 includes: an incinerator 3, which incinerates waste; a first flow path (1 pass), which extends vertically upward from the incinerator 3 and is the flow path of 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 the 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 the lower end.

[0050] Here, the “pass” in “1st pass”, “2nd pass”, and “3rd pass” 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-mentioned structure, the waste incinerator equipment 2 also includes: an economizer 9 for heat exchange of the heat of the exhaust gas passing through the third flow path (3rd pass); a cooling tower 10 for cooling the exhaust gas undergoing heat exchange; a dust removal device 11 (bag filter) for removing coal dust from the cooled exhaust gas; and a chimney 12 for discharging the removed exhaust gas into the atmosphere.

[0052] Furthermore, the waste incinerator facility 2 is provided with an exhaust fan 13 downstream of the dust removal device 11 and upstream of the chimney 12. During the operation of the waste incinerator facility 2, the exhaust fan 13 is operated to generate an airflow from the first flow path (1st pass) to the chimney 12. During the operation stop period of the waste incinerator facility 2, that is, during the non-operation period of the incinerator 3, the exhaust fan 13 is stopped, and thus the airflow is not generated.

[0053] The incinerator 3 can be any type of incinerator. Figure 1 Therefore, the incinerator 3 includes: a hopper 5 for storing waste; a feeder 6 for pushing out the waste stored in the hopper 5 from below the hopper 5; a grate 4 for conveying and incinerating the waste pushed out by the feeder 6; and an ash chute 7 for discharging the residue incinerated on the grate 4.

[0054] In addition, for the sake of convenience, the grate 4 is a general term for the drying section, the combustion section, and the post-combustion section, each of which has a plurality of grates (grate). In addition, the incinerator 3 is connected to the furnace wall 8B around the first flow path (1st pass) in an airtight manner, so that when the waste incinerator equipment 2 is in operation, the exhaust fan 13 is operated, and the furnace of the incinerator 3 is sucked to form a negative pressure.

[0055] A manhole 8A is provided on the furnace wall 8B around the second flow path (2 passes), the third flow path (3 passes) or the connection between the second flow path (2 passes) and the third flow path (3 passes) as an inspection port for workers to enter the interior from the outside of the furnace wall 8B. In addition, a manhole 7A is provided on the wall surface of the ash chute 7 near the post-combustion section of the incinerator 3 as an inspection port for workers to enter the interior (inside the furnace) from the outside (outside the furnace) of the incinerator 3. Doors are provided on the manhole 7A and the manhole 8A, and these doors are airtightly closed during the operation of the waste incinerator equipment 2.

[0056] In the waste incineration facility 2 including a boiler, a boiler tube group for heat exchange of exhaust gas is arranged on the furnace wall 8B around the first flow path (1st pass), the second flow path (2nd pass), and the third flow path (3rd pass).

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

[0058] The automatic furnace wall cleaning system 1 may be a system in which the gantry 20 is raised and lowered using a column fixed to the working floor below the furnace, as in Patent Document 3, or a system in which the gantry 20 is hoisted from above the incinerator 3 to be raised and lowered, as in Patent Document 4. Furthermore, the automatic furnace wall cleaning system 1 may be a system in which, unlike Patent Document 3 or Patent Document 4, the gantry is mounted on a drone (e.g., a flying drone) that can stably be raised and lowered so that the gantry and the drone are raised and lowered together.

[0059] Here, an example of a system using a pole fixed to a work surface will be described.

[0060] Figure 1 The work floor 22A is a scaffolding, which is set on the grate 4 and is a work place for workers to assemble the columns 22 and the platform 20. The work floor 22A is an assembled type, and is formed by combining a plurality of plates having a length and width that can pass through the manhole 7A. The grate 4 may not be horizontal, for example, Figure 1As shown, there is a case where the work floor 22A is tilted in the Y-axis direction, so the legs supporting the work floor 22A are appropriately provided so as to set the work floor 22A horizontally. From the perspective of the safety of the workers or the viewpoint of improving the work efficiency of the above-mentioned assembly, the work floor 22A is preferably a floor covering most of the floor on the grate 4, that is, a floor (entire floor) arranged in a manner to substantially cover the entire surface of the drying section, the combustion section, and the post-combustion section.

[0061] like Figures 1 to 3 As shown, two columns 22, i.e., a pair, are arranged and fixed on the working ground 22A. The two columns 22 are assembled by combining a plurality of columnar members having a length and a width that can pass through the manhole 7A, each becoming a column, and are arranged vertically along the Y-axis direction (vertical direction).

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

[0063] A rack (plate-shaped or rod-shaped gear) is formed on the column 22, and pinions (circular gears) are respectively arranged at both ends of a 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 meshed. In addition, 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, that is, the pinion, so that the gantry 20 can be raised and lowered. This mechanism is a so-called "rack and pinion" mechanism.

[0064] The structure for raising and lowering the stage 20 using the work floor 22A, the column 22, and the "rack and pinion" mechanism may use, for example, the product name "Safety Stage" of Taihei Electric Co., Ltd.

[0065] The automatic furnace wall cleaning system 1 includes a stand 20 that can be raised and lowered and is horizontally arranged along the furnace wall 8B around the first flow path (1 pass), and a rail 24 that is provided on the stand 20 and extends along the end of the stand 20 .

[0066] like Figure 2As shown, when observing the plane formed by the X-axis and the Z-axis from the top of the first flow path (1 pass), the stand 20 includes: a frame 20A, the center of which is the same as the furnace wall 8B and has an outer periphery with a similar shape to the furnace wall 8B; a through hole 20D, the center of which is the same as the frame 20A and has an outer periphery with a similar shape to the frame 20A, and penetrates the inner side of the frame; a straight longitudinal member 20B, which is arranged inside the through hole 20D and has its two ends connected to the inner periphery of the frame 20A along the X-axis (equivalent to the outer periphery of the through hole 20D); and a straight horizontal member 20C, which is arranged inside the through hole 20D and has its two ends connected to the inner periphery of the frame 20A along the Z-axis.

[0067] A plurality of vertical members 20B and horizontal members 20C are arranged in the through hole 20D to reinforce the frame portion 20A, and also serve as supporting members when the gantry driving device 23 , the control device 29 , etc. are fixed to the gantry 20 as described later.

[0068] like Figure 2 As shown, a plurality of longitudinal members 20B and transverse members 20C are arranged in a grid shape, and the intervals between the plurality of longitudinal members 20B are equal to each other, and the intervals between the plurality of transverse members 20C are equal to each other. The space surrounded by two adjacent longitudinal members 20B and two adjacent transverse members 20C has a size that allows the column 22 to be inserted without contacting the longitudinal members 20B and the transverse members 20C.

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

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

[0071] Since workers do not need to ride on the platform 20, the frame 20A only needs to have a width that allows the rail 24 described later to be installed. Therefore, within the range allowed by various conditions such as strength, the through hole 20D is formed as large as possible, thereby making the platform 20 lighter and further reducing the power consumption required for raising and lowering the platform 20.

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

[0073] The first suction device 30 described later (see

[0098] -

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

[0089] -

[0092] ), as shown here. Figure 2The first suction device 30 is arranged at a position closer to the arrow direction side of the X-axis than the stage driving device 23, so that the discharge port 30A of the first suction device 30 is located near the connection part of the first flow path (1st pass) and the second flow path (2nd pass), and the discharge port 30A is directed to the arrow direction side of the X-axis (and the arrow direction side of the Y-axis) and fixed to the longitudinal material 20B or the transverse material 20C.

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

[0116] -

[0119] ) is a device for controlling the platform driving device 23, the first suction device 30 and the cleaning device 21. Therefore, it is arranged near the platform driving device 23 and the first suction device 30 in a manner that the length of the control wiring is short, and is fixed to the longitudinal material 20B or the transverse material 20C.

[0075] In addition, when the platform driving device 23, the first suction device 30 and the control device 29 are fixed to the longitudinal material 20B or the transverse material 20C, in order to stably fix these devices, it is preferred to place them on at least two longitudinal materials 20B, place them on at least two transverse materials 20C, or place them on at least one longitudinal material 20B and at least one transverse material 20C and fix them.

[0076] like Figure 2 As shown, a track 24 is provided on a roughly quadrilateral frame portion 20A of the stand 20. Regarding the track 24, on the frame portion 20A at a position corresponding to a specific one of the four sides of the quadrilateral, one end 24A is arranged adjacent to the other end 24B, and extends from the one end 24A to the other end 24B through the other three sides different from the specific side. In other words, a track 24 that is C-shaped when viewed from the top is provided.

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

[0078] Since the rail 24 is formed in a manner that prevents the cleaning device 21 from encircling the frame 20A, the length of the wiring connecting the control device 29 provided on the stand 20, the first suction device 30 or the cleaning device 21 (control wiring (not shown), the flexible first suction tube 27A connected to the cleaning device 21 and the first suction device 30, etc.) can be set to the necessary and minimum length, which is excellent from an economic point of view.

[0079] In addition, if the cleaning device 21 is constructed so as to be able to surround the frame 20A more than one time, the wiring will be entangled with the column 22, the control device 29 provided on the platform 20, the first suction device 30 or the platform driving device 23, thereby causing 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 surround the frame 20A once, there is no concern about the occurrence of such a malfunction.

[0080] As for the track 24, as long as the cleaning device 21 cannot circle the frame 20A, a circular track without a gap may be formed, and wheel chocks for blocking the movement of the cleaning device 21 may be provided at positions corresponding to one end 24A and the other end 24B.

[0081] The track 24 may be a rail-shaped track such as a train or monorail, or may be a track in which a concave guide is formed on the frame 20A. Therefore, the cleaning device driving unit 28 of the cleaning device 21 includes 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 driving unit 28, spray material from the injection port 25A of the nozzle 25 to the furnace wall 8B to clean the furnace wall 8B, use a camera 26 (such as a camera) to capture the cleaning status, and use a suction nozzle 27 to absorb coal dust generated in the shooting direction.

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

[0084] As described above, when the first suction device 30 is not fixed to the stand 20 but is mounted on the cleaning device driving unit 28 so as to be movable, the cleaning device 21 includes the first suction device 30 and is integrated as a unit.

[0085] Figures 1 to 3 The cleaning device 21 is provided with a frame (not given a symbol) on the cleaning device driving unit 28, and the nozzle 25, the suction nozzle 27, and the camera 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 in the horizontal direction toward the furnace wall 8B, and the suction nozzle 27 is formed to be shorter than the nozzle 25.

[0086] In addition, the nozzle 25 is connected to Figure 1 and Figure 3 One end of the bendable spray supply pipe 25B shown. Figure 1 As shown, the other end of the spray material supply pipe 25B is connected to a spray material supply device 25C disposed outside the furnace through a manhole 7A. The spray material supply device 25C is a device for supplying spray material to the cleaning device 21.

[0087] The spray material supply pipe 25B is not inserted into the through hole 20D of the stand 20, but is Figure 3 As shown, the spray supply pipe 25B is provided on the surface of the frame (not given a symbol) of the cleaning device 21 on which the nozzle 25 is provided, and is provided from the same direction as the nozzle 25, and is arranged outside the frame 20A of the stand 20, that is, between the frame 20A and the furnace wall 8B. Therefore, the spray supply pipe 25B hangs down from the cleaning device 21 to the outside of the stand 20, and it is easy to follow the movement of the cleaning device 21, so that the cleaning operation can be smoothly performed.

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

[0089] Here, the cleaning device 21 is Figures 1 to 3 In addition to the device in which the positions of the nozzle 25, the suction nozzle 27 and the camera device 26 are fixed as shown, it is also possible to Figure 4 The device (cleaning device 21 ′) can move this position by the robot arm 50 as shown.

[0090] The robot arm 50 includes an arm 51 that is bendable at a joint, and a base 52 that is provided on the cleaning device driving unit 28 and rotatably supports the base end of the arm 51. The nozzle 25, the camera 26, and the suction nozzle 27 are provided at the front end 53 of the arm 51.

[0091] The control device 29 controls the robot arm 50 to bend or extend the joint of the arm 51, thereby changing the position of the front end portion 53 in the vertical direction (Y-axis direction) and the horizontal direction (X-axis direction) relative to the cleaning device driving unit 28. In addition, the control device 29 controls the robot arm 50 to rotate the front end portion 53 in the vertical direction, thereby changing the emission angle of the injection port 25A of the nozzle 25.

[0092] Therefore, compared with the cleaning device 21, the cleaning device 21' can maintain the distance between the nozzle 25 and the furnace wall 8B at a predetermined distance and can appropriately change the angle at which the spray material contacts the furnace wall 8B, thereby enabling more precise cleaning control.

[0093] The automatic furnace wall cleaning system 1 comprises: a first suction device 30, which is arranged on a stand 20 or a cleaning device 21, and has at least a blower 32, and does not have a dust filter, and discharges the coal dust sucked from the suction nozzle 27 upward through the blower 32; and a second suction device 40, which is separated from the first suction device 30 and is individually arranged in a detachable manner on the furnace wall 8B around the second flow path (2 passes) or the third flow path (3 passes), so as to generate an airflow from the first flow path (1 pass) to the second flow path (2 passes).

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

[0095] The second suction device 40 is connected to a flexible second suction pipe 40A which is airtightly connected by opening the door of the manhole 8A, and is attachable and detachable to the furnace wall 8B around the second flow path (2nd pass) or the third flow path (3rd pass).

[0096] Unlike the first suction device 30 , the second suction device 40 includes a dust collection filter in addition to a blower so as to prevent coal dust containing harmful substances in the furnace from leaking out of the furnace.

[0097] The airflow generated by the second suction device 40 is sufficient to move the tiny and light coal dust etc. generated during the cleaning operation to the second flow path (2nd pass). Therefore, compared with the case where the same suction device is arranged at a position downstream of the third flow path (3rd pass), the second suction device 40 can be equipped with a small blower with a small suction force, which is excellent from the viewpoint of economic efficiency.

[0098] The first suction device 30 can be configured as follows: a blower is housed in a frame having a discharge port 30A, and a bendable first suction pipe 27A is connected to the frame and the suction nozzle 27. The first suction device 30 at least has a blower, but unlike a general suction device, it intentionally does not have a dust filter for capturing coal dust. Therefore, the first suction device 30 can be manufactured at a low cost and can be lightweight.

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

[0100] The first suction device 30 sucks coal dust from the suction nozzle 27 by negative pressure generated by driving the blower, and the direction of the discharge port 30A is set to discharge the coal dust sucked from the suction nozzle 27 toward the upper side of the cleaning device 21 in the Y-axis direction.

[0101] In the first suction device 30, as long as the discharge port 30A is directed at least upward, the kinetic energy of the discharge of the first suction device 30 and the combined force of the airflow of the second suction device 40, in other words, by increasing the synthetic vector of the kinetic energy directed upward, the relatively light coal dust and the like that are not easily dropped and are flying in front of the camera device 26 of the cleaning device 21 due to Brownian motion and the like can be easily moved from the first flow path to the second flow path, thereby being 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 cleaning operations near the first suction device 30, if the suction nozzle 27 of the cleaning device 21 sucks in relatively large and heavy coal dust and slag in addition to the tiny and light coal dust and discharges them from the discharge port 30A, these relatively large and heavy coal dust and slag may fall in front of the camera device 26.

[0103] However, these large and heavy coal dusts fall in front of the camera device 26 due to gravity in an instant, and will not fly in front of the camera device 26 for a long time like the tiny and light coal dusts, so they will not block the camera. Therefore, even if these large and heavy coal dusts and slags fall in front of the camera device 26, they will not affect the performance of the automatic cleaning operation performed by the cleaning device 21.

[0104] On the other hand, the first suction device 30 and the second suction device 40 can easily move the fine and light coal dust generated during the cleaning work from the first flow path (1st pass) to the second flow path (2nd pass), which is another area separated by the furnace wall.

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

[0106] As described above, the first suction device 30 will still work 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) will change as the stand 20 is raised or lowered. Therefore, it is preferred to adopt a structure that can more effectively move the tiny and light coal dust from the first flow path (1st pass) to the second flow path (2nd pass). Specifically, a structure that changes the angle of the discharge port 30A according to the vertical position of the stand 20. For example, it is preferred as follows: no matter where the stand 20 is raised or lowered, the discharge port 30A is fixed upward. Figure 1 As indicated by the dotted arrow, the coal dust sucked by the first suction device 30 is discharged toward the connection portion between the first flow path (1st pass) and the second flow path (2nd pass).

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

[0108] Figure 5 It 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 housed and fixed to the frame 31. An exhaust port 30A is provided at one end of the frame 31.

[0110] The frame 31 is attached to the upper surface of the fixing table 33 so as to be rotatable about the end side opposite to the discharge port 30A. By adjusting the rotation angle of the frame 31 relative to the fixing table 33, the direction of the discharge port 30A can be adjusted.

[0111] As the frame 20 is driven up and down, the control device 29 controls the rotation angle of the frame 31 relative to the fixed table 33 so as to adjust the discharge port 30A to discharge the coal dust toward the connection portion between the first flow path (1st pass) and the second flow path (2nd pass). That is, even if the position (height) of the frame 20 in the up-down direction changes, the direction of the discharge port 30A (the discharge direction of the coal dust) can be changed to be directed toward the connection portion between the first flow path (1st pass) and the second flow path (2nd pass), so that the fine and light coal dust can be effectively sent to the second flow path (2nd pass).

[0112] Figure 6 2 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 the provision of a discharge nozzle 34 , but the other structures are the same as the first suction device 30 ′.

[0114] In the first suction device 30 ″, a frame 31 is immovably fixed to a fixing table 33 . One end of a discharge nozzle 34 is rotatably mounted on one end of the frame 31 , and a discharge port 30A is provided at the other end of the discharge nozzle 34 .

[0115] As the frame 20 is raised and lowered, the control device 29 controls the rotation angle of the discharge nozzle 34 relative to the frame 31 to adjust the discharge port 30A to discharge coal dust toward the connection between the first flow path (1st pass) and the second flow path (2nd pass). In this way, the same effect as the first suction device 30' can be obtained.

[0116] The control device 29 controls the lifting and lowering of the gantry 20, the movement of the cleaning device 21 along the track 24, and the spraying of the spray material from the nozzle 25 according to the cleaning conditions photographed by the camera 26. The control device 29 may be equipped with artificial intelligence (AI) and perform the control by artificial intelligence.

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

[0118] The control device 29 acquires the image data captured by the camera 26 of the cleaning device 21, and analyzes the image data to grasp the cleaning status of the furnace wall 8B. In addition, the control device 29 controls the stage driving device 23 to move the stage 20 in the up-down direction (Y-axis direction) according to the status, controls the cleaning device driving unit 28 of the cleaning device 21 to move the unitized cleaning device 21 on the track 24, and controls the spray material supply device 25C arranged outside the furnace to spray the spray material from the nozzle 25 of the cleaning device 21.

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

[0120] With the above configuration, the automatic furnace wall cleaning system 1 can shorten the time required for cleaning work, and can economically and accurately perform automatic cleaning work without the involvement of a human worker.

[0121] In addition, in the cleaning device 21, 21', an electric pick may be installed instead of the nozzle 25, and the cleaning operation may be performed using the electric pick. Also, after the cleaning operation, a blowing nozzle may be installed instead of the nozzle 25, and unshaped refractory may be sprayed onto the furnace wall through the blowing nozzle to automatically perform the repair operation of the furnace wall 8B.

[0122] Explanation of symbols

[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, 20B-Longitudinal material, 20C-Horizontal material, 20D-Through hole, 21, 21'-Cleaning device, 22-Column, 22A-Working ground (whole ground), 23-Stand driving device, 23A-Stand driving shaft, 24-Track (Example - rail), 24A - one end, 24B - the other end, 25 - nozzle, 25A - injection port, 25B - spray supply pipe (spray supply hose), 25C - spray supply device, 26 - camera device, 27 - suction nozzle, 27A - first suction pipe (first suction hose), 28 - cleaning device drive unit, 29 - control device, 30, 30', 30" - first suction device, 30A - discharge port, 31 - frame, 32 - air blower, 33 - fixed table, 34 - discharge nozzle, 40 - second suction device, 40A - second suction pipe (second suction hose), 50 - mechanical arm, 51 - arm, 52 - base, 53 - front end.

Claims

1. An automatic furnace wall cleaning system, which is used during the shutdown period of a waste incinerator facility, wherein the waste incinerator facility comprises: Incinerators, burning waste; A first flow path extending vertically upward from the incinerator and serving as a flow path for exhaust gas discharged from the incinerator; a second flow path connected to an 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 stand capable of being raised and lowered along the furnace wall around the first flow path and arranged horizontally; A track, disposed on the platform and extending along an end of the platform; A cleaning device capable of moving along the track through a cleaning device driving unit, spraying a spray material from a nozzle nozzle to the furnace wall to clean the furnace wall, photographing the cleaning status with a camera device, and sucking coal dust generated in the photographing direction with a suction nozzle; A control device for controlling the lifting and lowering of the platform, 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, which is arranged on the stand or the cleaning device, has at least a blower and does not have a dust collection filter, and discharges the coal dust sucked from the suction nozzle upward through the blower; and The second suction device is separately and detachably disposed on the furnace wall around the second flow path or the third flow path from the first suction device to generate an airflow 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 coal dust toward a connection portion 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 a wall surface near a connection portion 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 comprises a robot arm having the nozzle at the front end. The control device controls the distance between the injection port and the furnace wall to a predetermined distance by driving the robot arm to extend and retract.

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 also has: A column, arranged in a vertical direction on the grate of the grate furnace; a platform driving device, which raises and lowers the platform along the column through a rack and pinion mechanism; and a spray material supply device for delivering the spray material to the cleaning device via a flexible spray material supply pipe connected to the cleaning device, The stand is in the shape of a frame having a through hole through which the column is inserted. The track is a substantially C-shaped track with one end as a starting point and the other end as an end point, so that the cleaning device cannot go around the frame. The spray supply pipe is arranged between the frame and the furnace wall. The spraying and supplying device is arranged outside the grate furnace. The control device controls the stage driving device to raise and lower the stage.

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