JP4415320B2 - Incinerator ash removal apparatus and method - Google Patents

Description

  The present invention relates to an ash removal apparatus for removing ash adhering to a wall surface and an ash removal method in an incinerator installed in a waste treatment facility.

  Conventionally, an incinerator that heats a rotary gasification furnace with a high-temperature gas of a gas burner and performs carbonization treatment on an object to be treated such as garbage that has been put into the gasification furnace while rotating the gasification furnace is known. . This incinerator is configured to surround the gasification furnace with a cylindrical jacket divided into two parts, and to feed the hot gas of the gas burner into a donut-shaped space between the gasification furnace and the jacket. Therefore, in the incinerator having such a configuration, fly ash contained in the high-temperature gas of the gas burner adheres to the outer wall surface of the gasification furnace due to long-term operation, and ash generated by carbonization treatment is deposited on the inner wall surface of the gasification furnace. Adhere to. For this reason, ash removal work is regularly carried out.

  By the way, when the wet construction method using water is adopted when removing the ash, a post-treatment facility for water containing dioxin is required, so that it is difficult to implement in terms of cost and space. Under such circumstances, ash removal is carried out by the sandblasting method described in Patent Document 1 or the like, that is, a blasting material such as steel grit injected with high-speed air is collided with the wall surface to which ash is adhered, and the impact The ash is removed with force.

  However, the sandblasting method has a problem that dust containing ash is scattered because the blasting material rebounds with a strong force. Ashes contain dioxins, dust scattering should be avoided as much as possible.

  Therefore, in order to solve such a problem, the applicant of the present application has proposed a so-called sponge blasting method using a sponge piece blast medium in which an abrasive is contained in a porous elastic body. According to this sponge blasting method, when the blast medium collides with the wall surface, the blast medium becomes flat, and the mixed abrasive directly collides with the wall surface at high speed. Thereby, the ash adhering to the wall surface can be removed similarly to the sandblasting method. Further, since dust that normally floats in the air is taken into the sponge piece and falls as it is, there is an advantage that dust scattering can be greatly reduced.

The above blasting work is preferably performed in a state where the work area is partitioned by a partition having a tube disclosed in Patent Document 2 or the like, but for suitably partitioning the work space in the ash removal device of the incinerator. No means has been proposed in the past.
JP 9-109029 A Utility Model Registration No. 3033931

  As described above, in the incinerator ash removal apparatus, dioxins are contained in the ash to be removed. In addition, there is also a demand for finishing the work in a short time by efficiently carrying out the removal work.

  The present invention has been made in view of such circumstances, and an incinerator ash removal apparatus and method capable of efficiently and reliably removing ash such as fly ash adhering to the incinerator without scattering. The purpose is to provide.

In order to achieve the above object, the invention relating to the ash removal apparatus for an incinerator according to claim 1 comprises a cylindrical incinerator disposed in a horizontal direction and rotating around a horizontal axis, and the cylinder A gas burner in the space between the cylindrical incinerator and the jacket while rotating the cylindrical incinerator with the work to be processed in the cylindrical incinerator. An ash removal apparatus used in an incinerator for carbonizing the workpiece by feeding a high-temperature gas of the gas burner, wherein the blast medium is projected on the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface . in ash removal apparatus for removing ash by hot gases, while being freely mounted movable in the axial direction and the circumferential direction of the cylindrical incinerator on the outer wall surface of the cylindrical incinerator, the cylindrical burning the blast media On the outer wall of the furnace A working working opening for morphism is formed in the floor vehicles, provided at the lower peripheral portion of the work vehicle, the seal member for sealing the interior of the work vehicle in close contact with the outer wall surface of the cylindrical incinerator And a guide member that guides the work vehicle movably in the axial direction of the cylindrical incinerator.

In order to achieve the above object, an incinerator ash removal method according to claim 4 includes a cylindrical incinerator arranged in a horizontal direction and rotating about a horizontal axis, and the cylinder A gas burner in the space between the cylindrical incinerator and the jacket while rotating the cylindrical incinerator with the work to be processed in the cylindrical incinerator. An ash removal method used in an incinerator for carbonizing the workpiece by feeding a high-temperature gas of the gas burner, wherein the blast medium is projected onto the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface . in ash removal method for removing ash by hot gas, with placed movably the working vehicle on the outer wall surface of the cylindrical incinerator in the axial direction and the circumferential direction of the cylindrical incinerator, said cylindrical incinerator Laying parallel to the axial direction Outer and the guide member is inserted into the ring-shaped member of the working vehicle to guide movably the working vehicle in the axial direction, the seal member provided on the lower peripheral portion of the work vehicle of the cylindrical incinerator Sealing the interior of the work vehicle in close contact with the wall surface, projecting the blast medium to a predetermined area on the outer wall surface of the cylindrical incinerator through the work opening formed on the floor of the work vehicle, after removing the ash deposited in a predetermined area, the while preventing the co-rotation of the work vehicle by the guide member, the cylindrical incinerator is rotated by a predetermined angle, and thereafter, the cylindrical burning the sealing member A work vehicle is sealed in close contact with the outer wall surface of the furnace, and the blasting medium is projected to an unremoved area on the outer wall surface of the cylindrical incinerator through a work opening formed on the floor of the work vehicle. It is characterized by doing.

  According to the fly ash removal apparatus and method of an incinerator according to claims 1 and 4, first, the work vehicle is placed on the outer wall surface of the incinerator so as to be movable in the axial direction and the circumferential direction of the incinerator. For example, the movement can be performed by attaching a ball caster to the lower part of the work vehicle. Next, a seal member provided at the lower peripheral portion of the work vehicle is brought into close contact with the outer wall surface of the incinerator to seal the interior of the work vehicle, thereby preventing dust from leaking from the interior. Next, the blast medium is projected onto a predetermined area on the outer wall surface of the incinerator through the work opening formed on the floor of the work vehicle, and the ash adhering to the predetermined area is removed. The blast medium may be a medium used for the sand blast method or a medium used for the sponge blast method. The dust generated at this time does not leak to the outside because the room is completely sealed by the sealing member. After the ash is removed, the incinerator is rotated by a predetermined angle with a guide member that guides the work vehicle so as to be movable in the axial direction of the incinerator. The removal area is positioned below the work opening. Thereafter, the seal member is brought into close contact with the outer wall surface of the incinerator again to seal the interior of the work vehicle, and the blast medium is projected onto the non-removed area through the work opening portion to remove the ash in the area. Thereafter, the rotating operation of the incinerator is repeated, and the ash removal work is performed on the entire peripheral surface of the incinerator where the work vehicle is located. When this operation is completed, the work vehicle is moved along the guide member in the axial direction of the incinerator by the length of the work opening. And the ash removal operation | work of the perimeter surface of the incinerator located at this time is implemented according to the procedure mentioned above. As described above, the ash adhering to the entire outer wall surface of the incinerator can be removed by repeatedly performing the rotation operation of the incinerator and the axial movement operation of the incinerator of the work vehicle according to the above-described procedure.

  As in the present invention, the blasting operation is carried out in the work vehicle, the interior is sealed by the seal member, and the work vehicle is movably provided in the incinerator, so that the ash adhering to the outer wall surface of the incinerator is scattered. And can be removed efficiently and reliably.

In order to achieve the above object, the invention relating to the ash removal apparatus for an incinerator according to claim 2 comprises a cylindrical incinerator disposed in a horizontal direction and rotating about a horizontal axis, and the cylinder A gas burner in the space between the cylindrical incinerator and the jacket while rotating the cylindrical incinerator with the work to be processed in the cylindrical incinerator. An ash removal apparatus used in an incinerator for carbonizing the workpiece by feeding a high-temperature gas of the gas burner, wherein the blast medium is projected on the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface . In the ash removal device for removing ash by high-temperature gas, a pair of guide members disposed along the axial direction of the cylindrical incinerator with the cylindrical incinerator interposed therebetween, and movable along the pair of guide members When placed on In a working opening for projecting the blast media to the outer wall surface of the cylindrical incinerator and a work vehicle, which is formed in the floor, provided on the lower peripheral portion of the work vehicle, the cylindrical incinerator A seal member that is in close contact with the outer wall surface and seals the interior of the work vehicle; and an elevating unit that moves the pair of guide members up and down to move the work vehicle forward and backward relative to the outer wall surface of the cylindrical incinerator. It is characterized by that.

In order to achieve the above object, the invention relating to the ash removal method for an incinerator according to claim 5 comprises a cylindrical incinerator disposed in a horizontal direction and rotating about a horizontal axis, and the cylinder A gas burner in the space between the cylindrical incinerator and the jacket while rotating the cylindrical incinerator with the work to be processed in the cylindrical incinerator. An ash removal method used in an incinerator for carbonizing the workpiece by feeding a high-temperature gas of the gas burner, wherein the blast medium is projected onto the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface . In the ash removal method for removing ash by high-temperature gas , a pair of guide members are arranged in the axial direction of the cylindrical incinerator with the cylindrical incinerator interposed therebetween, and a work vehicle is mounted on the pair of guide members to be movable. Placed under the work vehicle A seal member provided on the peripheral portion is brought into close contact with the outer wall surface of the cylindrical incinerator sealed chamber of the working vehicle, wherein the blast medium through the working opening section formed in the floor of the work vehicle After projecting onto a predetermined area of the outer wall surface of the cylindrical incinerator and removing ash adhering to the predetermined area, the pair of guide members are lifted by lifting means to move the work vehicle to the cylindrical incinerator. Retracting from the outer wall surface, rotating the cylindrical incinerator by a predetermined angle, lowering the pair of guide members by elevating means to advance the work vehicle to the outer wall surface of the cylindrical incinerator, and the sealing member In close contact with the outer wall surface of the cylindrical incinerator to seal the interior of the work vehicle, and the blasting medium is placed on the outer wall surface of the cylindrical incinerator through a work opening formed on the floor of the work vehicle. Project to unremoved area It is characterized in.

  According to the incinerator ash removal apparatus and method described in claims 2 and 5, first, a pair of guide members are disposed in the axial direction of the incinerator with the incinerator interposed therebetween. Next, the work vehicle is movably mounted on a pair of guide members, and a seal member provided on the lower periphery of the work vehicle is brought into close contact with the outer wall surface of the incinerator to seal the interior of the work vehicle. Prevent leakage from inside the room. Next, the blast medium is projected onto a predetermined area of the outer wall surface of the incinerator through the work opening formed on the floor of the work vehicle, and the ash adhering to the predetermined area is removed. The blasting medium may be a medium used for the sandblasting method or a medium used for the sponge blasting method. The dust generated at this time does not leak to the outside because the room is completely sealed by the sealing member. After the ash is removed, the pair of guide members are raised by the lifting and lowering means to retract the work vehicle from the outer wall surface of the incinerator. Then, the incinerator is rotated by a predetermined angle so that the unremoved area following the predetermined area is positioned below the work opening. Next, the pair of guide members are lowered by the elevating means, the work vehicle is advanced to the outer wall surface of the incinerator, and the seal member is brought into close contact with the outer wall surface of the incinerator to seal the interior of the work vehicle. Then, the blast medium is projected onto the unremoved area through the work opening, and the ash in the area is removed. Thereafter, the ascending / descending operation of the work vehicle and the rotating operation of the incinerator are repeated, and the ash removal work is performed on the entire peripheral surface of the incinerator where the work vehicle is located. When this work is completed, the work vehicle is moved in the axial direction of the incinerator by the length of the work opening. And the ash removal operation | work of the perimeter surface of the incinerator located at this time is implemented. In this way, the ascending / descending operation of the work vehicle, the rotation operation of the incinerator, and the axial movement operation of the incinerator of the work vehicle are repeatedly performed according to the procedure described above, thereby removing ash adhering to the entire outer wall surface of the incinerator be able to.

  As in the present invention, the blasting operation is performed in the work vehicle, the interior is sealed by the seal member, and the work vehicle is provided so as to be movable up and down and in the axial direction of the incinerator, so that it adheres to the outer wall surface of the incinerator. The ash can be efficiently and reliably removed without scattering.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the work vehicle is provided with an atmospheric pressure control means for maintaining the interior of the work vehicle at a negative pressure.

  According to the invention of claim 3, since the interior of the work vehicle is maintained at a negative pressure by the atmospheric pressure control means, the indoor atmosphere can be confined in the interior. Therefore, it is possible to reliably prevent the dust scattered inside the room from leaking outside.

In order to achieve the above object, an incinerator ash removal apparatus according to claim 6 comprises a cylindrical incinerator disposed in a horizontal direction and rotating about a horizontal axis, and the cylinder A gas burner in the space between the cylindrical incinerator and the jacket while rotating the cylindrical incinerator with the work to be processed in the cylindrical incinerator. Is an ash removal apparatus used in an incinerator for carbonizing the object to be treated by feeding a high-temperature gas, and blasting medium is projected onto the inner wall surface of the cylindrical incinerator to remove ash adhering to the inner wall surface in ash removal apparatus for a furnace space of the cylindrical incinerator, projection space and the upper and lower with partitions on the operator's work space of the blast media is vertically through the wheel to the inner wall surface of the cylindrical incinerator partition that is supported in the direction A wall, provided on the peripheral portion of the partition wall, and a seal member for sealing the projection space in close contact with the inner wall surface of the cylindrical incinerator, provided in the partition wall, the nozzles projecting the blast media An insertion port to be inserted into the projection space, and a glove attached to the partition wall and gripping the nozzle inserted into the projection space from the insertion port.

  Invention of Claim 6 is invention of the removal apparatus of the ash adhering to the inner wall face of an incinerator. According to this ash removal apparatus, the in-furnace space of the incinerator is partitioned by the partition wall into the blast medium projection space and the worker's work space. And the sealing member provided in the peripheral part of the partition wall is closely_contact | adhered to the inner wall surface of an incinerator, the projection space is sealed, and the leakage of the dust scattered in the projection space is prevented. Then, the blast medium projection slur is inserted into the projection space from the insertion port provided in the partition wall, and this nozzle is gripped by using gloves provided in the partition wall, and is applied to the inner wall in the projection space. Adhering ash is removed by blasting media. After the ash removal, the incinerator is rotated by a predetermined angle, and the unremoved area following the previous ash removal area is positioned in the projection space. At this time, since the upper part and the lower part of the partition wall are supported by the inner wall surface of the incinerator via the wheels, the partition wall is held at the initial position without being used with the incinerator. Therefore, the ash removal work of the inner wall can be performed without moving the partition wall. In addition, what is necessary is just to move a partition wall to the said axial direction with a wheel, when removing the ash of the unremoved area adjacent in the axial direction of an incinerator.

  As described above, according to the present invention for removing the ash on the inner wall surface of the incinerator, the blasting operation is performed in the projection space, the projection space is sealed by the seal member, and the partition wall is moved on the inner wall surface of the work vehicle. Since it was supported freely, the ash adhering to the inner wall surface of the incinerator can be efficiently and reliably removed without being scattered.

  According to the incinerator ash removal apparatus and method therefor according to the present invention, the blasting operation is carried out in the work vehicle, the interior is sealed by the seal member, and the work vehicle is provided movably in the incinerator. The ash adhering to the outer wall surface of the furnace can be efficiently and reliably removed without being scattered.

  Further, according to the present invention, the blasting operation is performed in the work vehicle, the interior is sealed by the seal member, and the work vehicle is provided so as to be movable up and down and in the axial direction of the incinerator. Ashes adhering to can be efficiently and reliably removed without being scattered.

  Further, according to the present invention, the blasting operation is performed in the projection space, the projection space is sealed by the seal member, and the partition wall is movably supported on the inner wall surface of the incinerator. It is possible to efficiently and reliably remove the ash adhering to the surface without scattering.

  Hereinafter, preferred embodiments of an incinerator ash removal apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an overall view showing a basic structure of a sponge blasting device 20 applied to the ash removal device of the embodiment. First, the sponge blasting method using the sponge blasting device 20 will be described. As shown in FIG. 2, the blasting medium 26 used in this method is made of different materials (steel grit, alumina, starlight, urea resin, etc.) depending on the application. ) (In the case of UNIA resin, also called a polishing material) is included in a sponge piece (porous elastic body) 24, and this blast medium 26 is projected onto the attached ash 28 by high-pressure air. In this method, the ash 28 is removed by grinding.

  According to the sponge blasting method, when the blast medium 26 collides with the ash 28 as shown in FIG. 2 (A), the blast medium 26 becomes flat as shown in FIG. 2 (B), and the mixed abrasives 22, 22. Crash directly at high speed. Thereby, ash 28 can be ground like FIG.2 (C) similarly to the sandblasting method. Further, since dust 32, 32... That normally drifts in the air is taken into the sponge piece 24 and falls as it is, dust scattering is greatly reduced. Further, since the repelling force is also absorbed by the sponge piece 24, the rebound of the blast medium 26 can be greatly reduced.

  Therefore, the equipment 36 of the operator 34 who handles the sponge blasting device 20 as shown in FIG. FIG. 3 shows a diagram in which the operator 34 holds the nozzle 38 of the sponge blasting device 20 and the hose 39 in the vicinity thereof with both hands and projects the blast medium 26 toward the object 40. The worker 34 does not need to be equipped with a protector such as an iron plate throughout the body as in the sandblasting method, and the helmet 42 is not a full-face type helmet that covers the entire head and face, but at the work site. A simple helmet in which a face protector 43 made of a transparent acrylic plate is attached to a normal helmet to be used is a lightweight equipment 36. Thereby, since the weight of equipment becomes light, the labor of the operator 34 can be reduced significantly.

  In addition, since the ash to be removed described in this example contains dioxin, the worker 34 engaged in ash removal is not equipped with the light equipment shown in FIG. 3 but heavy equipment wearing a dustproof suit and a dustproof helmet. It becomes. This equipment is only for dioxin countermeasures, and is not intended to protect against blast media rebound.

  As shown in FIG. 1, the sponge blast device 20 includes a sponge blast supply device 50, a compressor 52, a nozzle 38, a suction device 54, a recycle separator 56, and a hopper 58.

  The sponge blast supply device 50 is supplied with high-pressure air from the compressor 52 and blast medium 26 (see FIG. 2) from the hopper 58. The blast medium 26 is air conveyed by the high pressure air from the compressor 52 through the hose 39 and is projected from the tip of the nozzle 26 toward the object 40 at a high speed. Then, the blast medium 26 used for grinding falls as it is with the dust 32, 32... (See FIG. 2C), and is sucked into the suction machine 54 from the suction port 60 installed in the vicinity of the dropping position. And sent to the recycle separator 56.

  The recycle separator 56 is configured by stacking two middle sieves 62 and 64 on a vibrator 66 with a large sieve mesh size. First, the blast medium 26 is fed into the sieve 62 having a large eye size, and the sieve 62 is vibrated by the vibrator of the vibration exciter 66, whereby the large blast medium 26 is selected and screened 62. Taken from. The blast medium 26 that has passed through the sieve 62 falls onto the sieve 64, and the medium-sized blast medium 26 is sorted out by the sieve 64 that is also vibrated by a vibrator. The large and medium-sized blast medium 26 removed from the sieves 62 and 64 can be used as it is, and is conveyed to the hopper 58. The fine blast medium 26 that has passed through the sieve 64 is stored in a container 68 and discarded because it cannot be reused. The reusable blast medium 26 is about 90% of the whole. The above is the configuration of the sponge blasting device 20.

  Next, an incinerator ash removal apparatus using a sponge blasting apparatus will be described.

  The basic structure of the ash removal sponge blasting apparatus described below is basically the same as the apparatus shown in FIGS. 1 to 3, but in order to prevent the removed ash from being scattered, The configuration is different. The nozzle 74 will be described later.

  FIGS. 4 to 8 show a first embodiment of an ash removal apparatus that removes fly ash adhering to the outer wall surface of a rotary gasification furnace 70 of an incinerator.

  As shown in FIG. 4, the ash removal apparatus of the present example has a work vehicle 72 that is movable on the outer wall surface of the gasification furnace 70, and an operator 34 inside the work vehicle 72 has a nozzle 74 of a sponge blast device. Is a device that removes fly ash adhering to the outer wall surface by projecting a blast medium onto the outer wall surface. In addition, the gasification furnace 70 in operation is surrounded by cylindrical jackets 76 and 76 that are divided into two as shown in FIG. During the fly ash removal operation, the upper jacket 76 is lifted by an overhead crane 78 or the like, and the work vehicle 72 is arranged in the space between the upper jacket 76 and the gasification furnace 70 formed thereby.

  The work vehicle 72 is configured in a substantially cubic shape, and four side walls and one ceiling surface are configured by a transparent acrylic plate so that the indoor worker 34 can be seen through from the outside. Further, a door 80 is provided on one of the side walls for the operator 34 to enter and exit as shown in FIG. Further, the floor portion of the work vehicle 72 is fully opened as a work opening portion 82, and the blast medium is projected onto the outer wall surface through the work opening portion 82. In addition, an air tube 84 as a seal member is attached to the entire periphery of the lower portion of the work vehicle 72. The air tube 84 is connected to a compressor (not shown) and is in close contact with the outer wall surface when compressed air is supplied from the compressor and expands. As a result, the lower periphery of the work vehicle 72 is sealed, so that the interior of the work vehicle 72 is sealed.

  Further, ball casters 86, 86... Serving as wheels of the work vehicle 72 are attached to the lower peripheral portion of the work vehicle 72, and a bracket 88 extending from the ball casters 86, 86. Magnet units 92 that are turned ON / OFF by a undulation operation are connected to each other. Therefore, when the magnet unit 92 is turned on, the magnet portion of the magnet unit 92 is attracted to the outer wall surface, so that the work vehicle 72 can be fixed on the outer wall surface.

  Further, in the work vehicle 72, a pair of wire ropes (guide members) 94, 94 laid in parallel with the central axis 71 of the gasification furnace 70 are inserted into ring-shaped members 96, 96. Accordingly, the gasification furnace 70 is guided so as to be movable along the central axis 71. The wire ropes 94 and 94 are stretched over the entire length of the gasification furnace 70 above the gasification furnace 70. As a result, the work vehicle 72 can travel and travel over the entire length of the gasification furnace 70 while being guided by the wire ropes 94.

  Further, as shown in FIG. 4, a hose 96 and an exhaust duct 98 are connected to the work vehicle 72. A blast medium supply hose 100 and a blast medium suction hose 102 are inserted into the hose 96, and an air line hose 104 for supplying breathing air to the operator 34 is inserted therethrough. The distal end portion of the blast medium supply hose 100 is connected to the nozzle 74, and the proximal end portion of the blast medium supply hose 100 is connected to the sponge blast supply device 50 shown in FIG. Further, the distal end portion of the blast medium suction hose 102 is connected to the nozzle 74, and the proximal end portion of the blast medium suction hose 102 is connected to the suction machine 54.

  FIG. 6 is an explanatory diagram showing the work status of the worker 34 who is removing fly ash in the room of the work vehicle 72. As shown in the figure, the operator 34 grasps the blast medium supply hose 100 with the right hand and removes the fly ash adhering to the outer wall surface by pressing the rectangular nozzle body 75 against the outer wall surface with the left hand.

  As shown in the bottom view of the nozzle body 75 shown in FIG. 7A, the nozzle 72 is provided with a shot portion 106 at the center and a vacuum portion 108 at the outer periphery thereof. As shown in B), the blast medium supply hose 100 is connected, and the vacuum part 108 is connected to the blast medium suction hose 102. Therefore, the blast medium projected from the shot unit 106 to the outer wall surface collides with the outer wall surface, and then is removed from the vacuum unit 108 positioned on the outer periphery of the shot unit 106 via the blast medium suction hose 102 with the removed ash. And sucked into the suction machine 54. Reference numeral 110 denotes a rubber packing affixed along the rectangular outer periphery of the nozzle body 75, and the removed fly ash is leaked from the nozzle 74 by bringing the rubber packing 110 into close contact with the outer wall surface. Can be removed without suction.

  Next, the operation of the ash removal apparatus configured as described above will be described.

  First, the work vehicle 72 is placed on the outer wall surface of the gasification furnace 70 so as to be movable in the axial direction and the circumferential direction of the gasification furnace 70. This movement is made possible by a ball caster 86 attached to the lower part of the work vehicle 72. Further, the work vehicle 72 is guided by the pair of wire ropes 94, 94 movably along the central axis 71 of the gasification furnace 70.

  Next, the air tube 84 is expanded and brought into close contact with the outer wall surface of the gasification furnace 70 to seal the interior of the work vehicle 72 and prevent dust from leaking from the interior. Thereafter, the magnet unit 92 is turned on to fix the work vehicle 72 to the outer wall surface.

  Next, the sponge blast medium is projected to a predetermined area on the outer wall surface of the gasification furnace 70 through the work opening portion 82 formed on the floor of the work vehicle 72, and the ash adhering to this area is removed. Dust generated at this time is not leaked to the outside from the nozzle 74 because the rubber packing 110 of the nozzle 74 is in close contact with the outer wall surface. Since it is completely sealed by 84, it does not leak outside the work vehicle 72.

  After removing the ash, the magnet unit 92 is turned off and the air tube 84 is evacuated to return the work vehicle 72 to a movable state. Thereafter, with the work vehicle 72 prevented from rotating by the wire ropes 94, 94, the gasification furnace 70 is rotated by a predetermined angle about the central shaft 71 to continue to the previous ash removal area. The removal area is positioned below the work opening portion 82. Since the gasification furnace 70 is a rotary type, the gasification furnace 70 is rotated using this structural characteristic. Thereafter, the air tube 84 is expanded again to seal the interior of the work vehicle 72, and the blast medium is projected to the unremoved area via the work opening portion 82, and the ash in the area is removed.

  Thereafter, the turning operation of the gasification furnace 70 is repeated, and the ash removal work is performed on the entire peripheral surface of the gasification furnace 70 where the work vehicle 72 is located. When this work is completed, the work vehicle 72 is moved along the wire ropes 94 and 94 in the axial direction of the gasification furnace 70 by the length of the work opening portion 82. And the ash removal operation | work of the whole surrounding surface of the gasification furnace 70 located at this time is implemented according to the procedure mentioned above. Thus, the ash adhering to the entire outer wall surface of the gasification furnace 70 can be removed by repeatedly performing the rotation operation of the gasification furnace 70 and the axial movement operation of the work vehicle 72 according to the above-described procedure. .

  Therefore, according to the ash removal apparatus of the first embodiment, the blasting operation is performed in the work vehicle 72, the interior is sealed by the air tube 84, and the work vehicle 72 is provided in the gasification furnace 70 so as to be movable. Therefore, the ash adhering to the outer wall surface of the gasification furnace 70 can be efficiently and reliably removed without being scattered.

  When the gasification furnace 70 is a long structure, a plurality of work vehicles 72, 72... May be disposed on the outer wall surface of the gasification furnace 70 as shown in FIG. Reference numeral 112 denotes a scaffold plate that is separated from the gasification furnace 70 and is laid along the gasification furnace 70. When the gasification furnace 70 is rotated, the worker 34 can be retracted to the scaffold plate 112.

  FIG. 9 shows a second embodiment of the ash removal apparatus for removing fly ash adhering to the outer wall surface of the gasification furnace 70, which is the same as the ash removal apparatus of the first embodiment shown in FIGS. Similar members will be described with the same reference numerals.

  The ash removal apparatus shown in FIG. 9 has a pair of guide rails (guide members: one not shown) 114 and 114 and a pair of guides disposed along the axial direction of the gasification furnace 70 with the gasification furnace 70 interposed therebetween. It is comprised from the work vehicle 72 grade | etc., Mounted so that movement along the rails 114 and 114 was possible. The configuration of the work vehicle 72 is the same as that of the work vehicle 72 shown in FIGS. The guide rails 114 and 114 are fixed to the scaffolding plates 116 and 116, and the scaffolding plates 116 and 116 are moved up and down with respect to the gasification furnace 70 by the expansion and contraction operation of the piston 120 of the hydraulic cylinder (elevating means) 118. Is done. Thereby, the work vehicle 72 is moved back and forth in the vertical direction with respect to the gasification furnace 70.

  Next, the operation of the ash removal apparatus configured as described above will be described.

  First, on the both sides in the axial direction of the gasification furnace 70 with the gasification furnace 70 in between, a lifting device for a work vehicle including the guide rail 114, the scaffolding plate 116, and the hydraulic cylinder 118 is installed.

  Next, as shown in FIG. 9, the work vehicle 72 is movably mounted on the pair of guide rails 114, 114, and the air tube 84 (see FIG. 5) provided on the lower peripheral portion of the work vehicle 72 is expanded. It is made to adhere to the outer wall surface of the gasification furnace 70, the inside of the work vehicle 70 is sealed, and dust is prevented from leaking from the inside to the outside.

  Next, the blast medium is projected onto a predetermined area on the outer wall surface of the gasification furnace 70 through the work opening portion 82 (see FIG. 5) formed on the floor of the work vehicle 72, and the ash adhering to the predetermined area is removed. Remove. The dust generated at this time is not leaked outside from the nozzle 74 because the rubber packing 110 of the nozzle 74 is in close contact with the outer wall surface as shown in FIG. Since the room is completely sealed by the air tube 84, it does not leak to the outside of the work vehicle 72.

  After the ash is removed, the pair of guide rails 114, 114 are raised by the hydraulic cylinders 118, 118, so that the work vehicle 70 is retreated upward from the outer wall surface of the gasification furnace 72. Then, the gasification furnace 70 is rotated by a predetermined angle, and an unremoved area following the previous predetermined area is positioned below the work opening portion 82. Next, the pair of guide rails 114, 114 are lowered by the hydraulic cylinders 118, 118..., The work vehicle 72 is advanced to the outer wall surface of the gasification furnace 70, and the air tube 84 is expanded again to By closely contacting the outer wall surface, the interior of the work vehicle is sealed. Then, the blast medium is projected to the unremoved area through the work opening portion 82, and the ash in the area is removed. Then, the raising / lowering operation | movement of the working vehicle 72 and the rotation operation of the gasification furnace 70 are repeated, and the ash removal operation | work of the perimeter surface of the gasification furnace 70 in which the working vehicle 72 is located is implemented.

  When this operation is completed, the work vehicle 72 is moved along the guide rails 114 and 114 in the axial direction of the gasification furnace 70 by the length of the work opening portion 82. And the ash removal operation | work of the perimeter surface of the gasification furnace 70 located at this time is implemented. As described above, the lifting and lowering operation of the work vehicle 70, the rotation operation of the gasification furnace 70, and the axial movement operation of the work vehicle 72 are repeatedly performed according to the above-described procedure, thereby attaching to the entire outer wall surface of the gasification furnace 70. Ashes can be removed.

  Therefore, according to the ash removal apparatus of the second embodiment, the blasting operation is performed in the work vehicle 72, the room is sealed by the air tube 84, and the work vehicle 72 is moved up and down and in the axial direction of the gasification furnace 70. Since it was provided movably, the ash adhering to the outer wall surface of the gasification furnace 70 can be efficiently and reliably removed without being scattered.

  Further, according to the ash removal device of FIG. 9, the work vehicle 72 is provided with an atmospheric pressure control device that maintains the interior of the work vehicle 72 at a negative pressure.

This barometric pressure control device includes a barometer 122 that measures the atmospheric pressure inside the work vehicle 72, a barometer 124 that measures the atmospheric pressure of the outside air, and an exhaust fan for the exhaust duct 98 based on the atmospheric pressure measured by the barometers 122 and 124. And a CPU 128 that controls the inverter 126 with an inverter. Although the air pressure in the room rises due to the projection of the blast medium by the high-pressure air, in this example, the CPU 124 uses the exhaust air so that the inside of the work vehicle 72 becomes −0.05 kg / cm ² with respect to the outside air that is atmospheric pressure. The fan 126 is inverter-controlled.

  Thereby, since the inside of the work vehicle 72 is maintained at a negative pressure, the indoor atmosphere can be confined in the room. Therefore, it is possible to reliably prevent the dust scattered in the room from leaking out of the work vehicle 72. Reference numeral 130 denotes a high performance filter (HEPA filter), and a very small amount of dust contained in the air sucked through the exhaust duct 98 is removed by the high performance filter 130. It goes without saying that such an atmospheric pressure control device may be provided in the ash removal device shown in FIG.

  Moreover, since the ash removal apparatus of 2nd Example raises / lowers the work vehicle 70 by a raising / lowering means, a gasification furnace is not limited to a cylindrical thing. On the other hand, since the ash removal apparatus of the first embodiment rotates the work vehicle 72 in a state of being placed on the gasification furnace 70, the gasification furnace 70 needs to be cylindrical.

  10 to 12 show an embodiment of an ash removal apparatus that removes ash adhering to the inner wall surface of the gasification furnace 70.

  This ash removal apparatus has a partition wall 136 that partitions the interior space of the gasification furnace 70 into a blast medium projection space 132 and an operator work space 134. The partition wall 136 includes a rectangular wall main body 138 and semicircular side walls 140 and 140 connected to both sides of the wall main body 138 in the orthogonal direction. Is made of a transparent plate such as acrylic so that it can be seen through from the outside. Further, ball casters 142, 142... That are wheels are attached to the upper and lower portions of the wall main body 138, and the ball casters 142 are also attached to the ends of rods 144, 144 extending horizontally on both sides of the wall main body 138. Is attached. These ball casters 142, 142... Are in contact with the inner wall surface of the gasification furnace 70, so that the partition wall 136 is movably disposed in the gasification furnace 70.

  Air tubes 146 and 146 are attached along the upper and lower sides of the wall body 138, and air tubes 148 are attached along the peripheral portion of the side wall 140. By expanding the air tubes 146 and 148, the air tubes 146 and 148 are brought into close contact with the inner wall surface, and the projection space 132 is sealed.

  Further, the wall body 138 is formed with an insertion port 150 for inserting the nozzle 38 for projecting the blast medium into the projection space 132. A pair of openings 152, 152 are formed on both sides of the insertion port 150, and a glove 154 shown in FIG. 11 is attached to these openings 152, 152 via a seal member (not shown). Yes. An expansion / contraction part 156 is formed at the base of the glove 154, and the operation range of the glove 154 is expanded by the expansion / contraction of the expansion / contraction part 156.

  Next, the operation of the ash removal apparatus configured as described above will be described.

  First, the partition wall 136 is inserted and disposed in the gasification furnace 70, and thereafter, both end openings of the gasification furnace 70 are closed with caps 158. A high performance filter 160 is attached to the opening of the cap 158, and the outside air communicates with the atmosphere in the gasification furnace 70 through the high performance filter 160. The cap 158 includes a hose that supplies a blast medium to the nozzle 38, an air line hose that supplies air for breathing to the operator 34, and an air hose that supplies air to the air tubes 146, 146, 148, and 148. An opening (not shown) through which is inserted is formed.

  When the partition wall 136 is disposed at a predetermined position in the gasification furnace 70, the air tubes 146, 146, 148, and 148 are then expanded and brought into close contact with the inner wall surface of the gasification furnace 70, thereby sealing the projection space 132. Thus, leakage of dust scattered in the projection space 132 is prevented.

  Then, the nozzle 38 is inserted into the projection space from the insertion port 150 provided in the partition wall, and the operator 34 holds the nozzle 38 using the gloves 154 and 154, and the inner wall located in the projection space. Ashes in FIG. 12 are removed by a blast medium projected from the nozzle 38 as shown in FIG.

  After the ash removal, the gasification furnace 70 is rotated by a predetermined angle, and the unremoved area following the previous ash removal area is positioned in the projection space 132. At this time, the upper and lower portions of the partition wall 136 are supported on the inner wall surface of the gasification furnace 70 via the ball casters 142, 142... It is held at the position. Therefore, the inner wall ash removal operation can be performed without moving the partition wall 136.

  In addition, what is necessary is just to move a partition wall to the said axial direction by the ball casters 142, 142 ..., when removing the ash of the unremoved area adjacent in the axial direction of an incinerator.

  As described above, according to the ash removal device that removes the ash on the inner wall surface of the gasification furnace 70, the blasting operation is performed in the projection space 132, the projection space 132 is sealed by the air tubes 146 and 148, and the partition wall Since 136 is movably provided on the inner wall surface of the gasification furnace 70, the ash adhering to the inner wall surface of the gasification furnace 70 can be efficiently and reliably removed without being scattered.

  In addition, although the example which used the sponge blasting apparatus was demonstrated in this example, it is not limited to this, You may use a sand blasting apparatus instead of a sponge blasting apparatus.

Overall structure of sponge blasting device Illustration explaining the mechanism of sponge blasting Illustration explaining the equipment of a sponge blast worker The perspective view which showed 1st Example of the ash removal apparatus which removes the fly ash adhering to the outer wall surface of a gasification furnace. Front view of the ash removal apparatus shown in FIG. Explanatory drawing showing the blasting status of the worker Structure diagram of nozzle of ash removal device shown in FIG. A perspective view showing an example in which three ash removal devices are installed in a gasifier The perspective view which showed 2nd Example of the ash removal apparatus which removes the fly ash adhering to the outer wall surface of a gasification furnace. A perspective view of an ash removal device that removes fly ash adhering to the inner wall of the gasifier Side view of the glove attached to the ash removal device of FIG. Side view of the ash removal apparatus shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 20 ... Sponge blasting device, 22 ... Grinding material, 24 ... Sponge piece, 26 ... Blasting medium, 28 ... Ash, 34 ... Worker, 36 ... Equipment, 38 ... Nozzle, 50 ... Sponge blast supply device, 52 ... Compressor, 54 ... suction machine, 56 ... recycle separator, 58 ... hopper, 70 ... gasification furnace, 72 ... work vehicle, 74 ... nozzle, 82 ... work opening, 84 ... air tube, 86 ... ball caster, 92 ... magnet unit 94 ... Wire rope, 114 ... Guide rail, 116 ... Scaffolding plate, 118 ... Hydraulic cylinder, 132 ... Projection space, 134 ... Work space, 136 ... Partition wall, 142 ... Ball caster, 146 ... Air tube, 148 ... Air tube 154 ... Gloves

Claims (6)

A cylindrical incinerator disposed horizontally and rotating around a horizontal axis, and a cylindrical jacket surrounding the cylindrical incinerator, and an object to be treated in the cylindrical incinerator An ash removal device used in an incinerator for carbonizing the object to be treated by feeding a high-temperature gas from a gas burner into a space between the cylindrical incinerator and a jacket while turning on and rotating the cylindrical incinerator. In the ash removal device for removing ash from the high-temperature gas of the gas burner that has been projected onto the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface,
While it is movably mounted in the axial direction and the circumferential direction of the cylindrical incinerator on the outer wall surface of the cylindrical incinerator, open working for projecting the blast media to the outer wall surface of the cylindrical incinerator A work vehicle whose part is formed on the floor;
A seal member provided at a lower peripheral portion of the work vehicle, tightly contacting an outer wall surface of the cylindrical incinerator, and sealing the interior of the work vehicle;
A guide member for guiding the work vehicle movably in the axial direction of the cylindrical incinerator;
An ash removal apparatus for an incinerator characterized by comprising: A cylindrical incinerator disposed horizontally and rotating around a horizontal axis, and a cylindrical jacket surrounding the cylindrical incinerator, and an object to be treated in the cylindrical incinerator An ash removal device used in an incinerator for carbonizing the object to be treated by feeding a high-temperature gas from a gas burner into a space between the cylindrical incinerator and a jacket while turning on and rotating the cylindrical incinerator. In the ash removal device for removing ash from the high-temperature gas of the gas burner that has been projected onto the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface,
A pair of guide members disposed along the axial direction of the cylindrical incinerator with the cylindrical incinerator interposed therebetween;
A work vehicle that is movably mounted along the pair of guide members, and has a work opening portion formed on the floor for projecting the blast medium onto an outer wall surface of the cylindrical incinerator,
A seal member provided at a lower peripheral portion of the work vehicle, tightly contacting an outer wall surface of the cylindrical incinerator, and sealing the interior of the work vehicle;
Elevating means for elevating and lowering the pair of guide members to move the work vehicle forward and backward with respect to the outer wall surface of the cylindrical incinerator;
An ash removal apparatus for an incinerator characterized by comprising:   The incinerator ash removal device according to claim 1 or 2, wherein the work vehicle is provided with an air pressure control means for maintaining a negative pressure in the work vehicle. A cylindrical incinerator disposed horizontally and rotating around a horizontal axis, and a cylindrical jacket surrounding the cylindrical incinerator, and an object to be treated in the cylindrical incinerator This is an ash removal method used in an incinerator for carbonizing the object to be treated by feeding the hot gas of the gas burner into the space between the cylindrical incinerator and the jacket while charging and rotating the cylindrical incinerator. In the ash removal method of removing ash due to the high-temperature gas of the gas burner that has been projected onto the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface,
Together placed movably the working vehicle on the outer wall surface of the cylindrical incinerator in the axial direction and the circumferential direction of the cylindrical incinerator, wherein the parallel laid down by the guide member and the axial direction of the cylindrical incinerator Inserting the work vehicle into the ring-shaped member to guide the work vehicle so as to be movable in the axial direction;
A seal member provided at a lower peripheral portion of the work vehicle is closely attached to an outer wall surface of the cylindrical incinerator to seal the interior of the work vehicle;
Projecting the blasting medium to a predetermined area of the outer wall surface of the cylindrical incinerator through an opening for work formed on the floor of the work vehicle;
After removal of the ash that has adhered to the predetermined area, the while preventing the co-rotation of the work vehicle by the guide member, the cylindrical incinerator is rotated by a predetermined angle, and thereafter, the cylindrical said seal member The inside of the work vehicle is sealed in close contact with the outer wall surface of the incinerator, and the blast medium is transferred to the unremoved area of the outer wall surface of the cylindrical incinerator through a work opening formed on the floor of the work vehicle. An incinerator ash removal method characterized by projecting. A cylindrical incinerator disposed horizontally and rotating around a horizontal axis, and a cylindrical jacket surrounding the cylindrical incinerator, and an object to be treated in the cylindrical incinerator An ash removal method used in an incinerator for carbonizing the object to be treated by feeding a high-temperature gas of a gas burner into a space between the cylindrical incinerator and a jacket while being charged and rotating the cylindrical incinerator. In the ash removal method of removing ash due to the high-temperature gas of the gas burner that has been projected onto the outer wall surface of the cylindrical incinerator and adhered to the outer wall surface,
A pair of guide members are arranged in the axial direction of the cylindrical incinerator with the cylindrical incinerator interposed therebetween,
A work vehicle is movably mounted on the pair of guide members,
A seal member provided at a lower peripheral portion of the work vehicle is closely attached to an outer wall surface of the cylindrical incinerator to seal the interior of the work vehicle;
Projecting the blasting medium to a predetermined area of the outer wall surface of the cylindrical incinerator through an opening for work formed on the floor of the work vehicle;
After removal of the ash that has adhered to the predetermined area, the pair of the guide member is raised by the elevating means is retracted the service vehicle from the outer wall surface of the cylindrical incinerator, a predetermined angle round the cylindrical incinerator The pair of guide members are moved down by the lifting and lowering means so that the work vehicle advances to the outer wall surface of the cylindrical incinerator and the seal member is brought into close contact with the outer wall surface of the cylindrical incinerator. And injecting the blasting medium onto an unremoved area of the outer wall surface of the cylindrical incinerator through a work opening formed on the floor of the work vehicle. Removal method. A cylindrical incinerator disposed horizontally and rotating around a horizontal axis, and a cylindrical jacket surrounding the cylindrical incinerator, and an object to be treated in the cylindrical incinerator An ash removal apparatus used in an incinerator for carbonizing the object to be treated by feeding a high-temperature gas of a gas burner into a space between the cylindrical incinerator and a jacket while turning on and rotating the cylindrical incinerator. In the ash removal apparatus for removing ash adhering to the inner wall surface by projecting a blast medium onto the inner wall surface of the cylindrical incinerator,
The furnace space of the cylindrical incinerator, partition the projection space to the upper and lower with partitions on the operator's work space of the blasting medium is supported in the vertical direction via the wheel on the inner wall surface of the cylindrical incinerator With walls,
A seal member provided on a peripheral portion of the partition wall, tightly contacting an inner wall surface of the cylindrical incinerator, and sealing the projection space;
An insertion port provided in the partition wall for inserting a nozzle for projecting the blast medium into the projection space;
A glove attached to the partition wall and holding the nozzle inserted into the projection space from the insertion port;
An ash removal apparatus for an incinerator characterized by comprising:

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