JP2013257113A - Deposit removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deposit removing device which can remove a deposit sticking to the interior of a boiler furnace in a short time without requiring great labor.SOLUTION: A deposit removing device removes a deposit of coal ashes sticking to the interior of a boiler furnace. The deposit removing device includes first and second support bars 1a and 1b, first to fourth rings 2a to 2d, first to fourth string members 3a to 3d, a moving shaft 4 which reciprocates between one ends of the first and second support bars 1a and 1b and the other ends of the first and second support bars 1a and 1b, and a crushing means 5 which reciprocates on the moving shaft 4 in its direction and crushes a deposit. The first and second string members 3a and 3b are stretched from a front fixed part 103 disposed on the boiler furnace, and the third and fourth string members 3c and 3d are stretched from a rear fixed part 104 opposite to the front fixed part 103.

Description

  The present invention relates to a deposit removing device that removes deposits attached to the surface of a superheater tube or the like in a boiler furnace.

  In a coal fired power plant, coal combustion ash melted by high-temperature combustion in a boiler furnace adheres to a superheater tube or the like. The coal combustion ash adhering to this superheater pipe | tube etc. is cooled with the vapor | steam which passes the inside of a superheater pipe | tube etc., solidifies, and becomes a big lump (what is called a clinker). This clinker may fall if it becomes large to some extent due to its own weight and vibration in the furnace. Also, during periodic inspections in the boiler furnace, it is necessary to assemble the inspection scaffold from the lower part of the furnace to a height of about 40 m. At this time, the clinker will peel off and fall, causing damage to the scaffold assembly workers. It is necessary to remove the clinker before starting the scaffold assembly work.

  The boiler is equipped with a viewing window for combustion monitoring, and a manhole for loading and unloading materials when the boiler stops due to periodic inspections, etc., and a worker entrance / exit. The superheater tube to which the above clinker adheres is suspended from the furnace ceiling side in the center of the furnace, so even if the furnace temperature drops to room temperature due to boiler stoppage, the worker must approach and remove it directly I can't. Then, the method of removing a clinker without approaching a superheater pipe | tube is proposed (patent document 1).

  The thing of patent document 1 removes a clinker with the high-pressure water washing apparatus comprised from a high pressure hose, a manipulator, a nozzle, etc. FIG. That is, a worker enters from a manhole and a long high-pressure water cleaning device is introduced from the rear of the boiler that can secure a work scaffold, and water and steam are sprayed from the nozzle tip to remove the clinker.

  There is also a method in which an operator inserts a long metal rod exceeding 10 m through a viewing window and directly pokes and removes the clinker.

Japanese Patent Laid-Open No. 9-61087

  However, in the method described in Patent Document 1, it is necessary to introduce a high-pressure hose up to a height of about 50 m from the ground. It takes effort. In addition, secondary losses such as accelerated deterioration and reduced heat insulation effect due to the penetration of the washing water into the heat insulating material of the superheater tube are also conceivable.

  In addition, when the worker removes the clinker by directly sticking it with a long metal rod, the inside diameter of the observation window is generally small, so the impact of the metal rod is applied only to a part of the clinker adhering to the superheater tube. Can't give. Moreover, the destructive power of the metal rod is small compared to the strength of the clinker. For these reasons, it has been difficult to expect a sufficient removal effect even if the worker takes a long time.

  Then, this invention provides the deposit | attachment removal apparatus which can remove the deposit | attachment adhering in the boiler furnace in a short time, without requiring big labor in view of the said situation.

  The deposit removing device of the present invention is a deposit removing device that removes deposits made of coal combustion ash deposited in a boiler furnace, and includes a first support bar and a second support rod arranged to face each other. A support ring, a first ring body provided above one end of the first support bar, a second ring body provided above the other end of the first support bar, and the second A third ring body provided above one end of the support rod, a fourth ring body provided above the other end of the second support rod, and the first, second and third , First, second, third and fourth string members fixed to the fourth ring body, respectively, extending in a direction perpendicular to the first support bar and the second support bar, A moving shaft that reciprocates between one end portion of the second support rod and the other end portions of the first and second support rods, and reciprocating along the axial direction on the moving shaft. And the first string member and the second string member are stretched from the front fixing portion provided in the boiler furnace, and the third string member and the fourth string member are provided. The string member is stretched from a rear fixing portion provided on the side opposite to the front fixing portion.

  According to the deposit removing device of the present invention, the crushing means can directly apply an impact force to the deposit to crush and drop the deposit. The moving shaft to which the crushing means is attached can reciprocate from one end of the first and second support rods to the other end, and the crushing means provided on the moving shaft can move both ends of the moving shaft. It can move in the axial direction. Thereby, the crushing means can move in the axial direction of the moving shaft and in the direction orthogonal thereto. Furthermore, when the first to fourth string members are loosened or pulled, the whole can be moved up and down, and the crushing means can be moved up and down. That is, by operating the string member, the remote operation can be performed from the outside of the boiler furnace or from the rear of the boiler, and the crushing means can be moved in three axial directions.

  In the above-described configuration, the moving unit includes a moving unit that moves the moving shaft, and the moving unit includes a pair of pulleys provided at both ends of the support rod, and an endless belt member that spans the pulley. An end portion of the moving shaft may be fixed to the belt member.

  The said structure WHEREIN: The said crushing means can be comprised with an electric drill.

  The said structure WHEREIN: The to-be-adhered object (for example, superheater pipe | tube etc.) can be provided with the holding means to hold | grip with the said moving shaft. Thereby, a crushing means can be made to approach a to-be-adhered thing (for example, superheater pipe | tube etc.), and the removal precision of an attached matter can be improved.

  The said structure WHEREIN: The said holding means can be equipped with a vibrator | oscillator. Thereby, after crushing a deposit | attachment, even if the peeled deposit | attachment remains in a to-be-adhered thing (for example, superheater pipe | tube etc.) or adheres to a crushing means, it can be dropped by vibration.

  In the deposit removing device of the present invention, the crushing means can crush and drop the deposit by directly applying an impact force, so that the deposit in the boiler furnace can be removed in a short time without requiring a great effort. be able to. In addition, since the crushing means can be moved in the three-axis direction by performing remote operation from outside the boiler furnace or behind the boiler, the deposit removal efficiency is improved safely with a simple configuration.

It is a perspective view which shows the deposit | attachment removal apparatus of 1st Embodiment of this invention. FIG. 2 is a simplified diagram showing a state in which the deposit removing device of FIG. 1 is attached to a boiler furnace. It is a top view which shows the state which attached the deposit removal apparatus of the said FIG. 1 to the boiler furnace. It is a figure which shows the method of removing the clinker adhering to the superheater pipe | tube by the said deposit | attachment removal apparatus of the said FIG. It is a simplified top view which shows the principal part of the deposit | attachment removal apparatus of 2nd Embodiment of this invention. It is the simplified sectional view which expanded further the principal part of the deposit removal device of a 2nd embodiment of the present invention.

  Hereinafter, the best mode for carrying out the present invention will be described.

  As shown in FIG. 2, the deposit removing apparatus of the present invention is remotely operated from the outside of the boiler furnace 100, and the deposits inside the boiler furnace 100 (in this embodiment, the secondary superheater tube 101 is Hereinafter, the deposit 102 (hereinafter referred to as the clinker 102) made of coal combustion ash adhering to the secondary superheater tube 101) is removed. In this case, the secondary superheater tube 101 has a panel shape constituted by a superheater tube group, and this panel shape is hereinafter referred to as a superheater tube.

  FIG. 1 is a perspective view of a deposit removing apparatus according to a first embodiment of the present invention. As shown in FIG. 1, the attachment removing device includes two support bars 1a and 1b, four ring bodies 2a, 2b, 2c, and 2d, four string members (hereinafter referred to as tow ropes) 3a, 3b, 3c, 3d, a moving shaft 4, a crushing means 5, and two moving means 6a, 6b.

  The support rod 1 is provided with two, a first support rod 1a and a second support rod 1b. These are constituted by members having substantially the same length, and are arranged to face each other so as to be substantially parallel.

  The ring body 2 includes four parts, that is, a first ring body 2a, a second ring body 2b, a third ring body 2c, and a fourth ring body 2d. The first ring body 2a is provided above one end portion of the first support rod 1a, and one end portion of the first support rod 1a is connected to the first ring via the first carabiner-like combined body 7a. It is fixed to the body 2a. Similarly, the other end of the first support rod 1a is fixed to the second ring body 2b via the second carabiner-like joined body 7b, and the second end via the third carabiner-like joined body 7c. One end of the support bar 1b is fixed to the third ring body 2c, and the other end of the second support bar 1b is fixed to the fourth ring body 2d via the fourth carabiner-like coupling body 7d. ing.

  Also, the first ring body 2a and the third ring body 2c are connected by the connecting means 8, and the second ring body 2b and the fourth ring body 2d are connected via the connecting means 8. ing. In the present embodiment, the connecting means 8 is constituted by a string-like member made of the same material as the tow rope 3.

  The tow rope 3 includes four pieces: a first tow rope 3a, a second tow rope 3b, a third tow rope 3c, and a fourth tow rope 3d. The first traction rope 3a is fixed to the first ring body 2a, the second traction rope 3b is fixed to the second ring body 2b, and the third traction rope 3c is fixed to the third ring body 2c. The fourth pulling rope 3d is fixed to the fourth ring body 2d.

  The moving shaft 4 is composed of a rod-like member extending in a direction orthogonal to the first support rod 1a and the second support rod 1b. The moving shaft 4 reciprocates between one end portions of the first and second support rods 1a and 1b and the other end portions of the first and second support rods 1a and 1b by driving a moving means 6 described later. To do.

The crushing means 5 is composed of a publicly known electric drill, and the moving shaft is arranged along the axial direction by a combination of a circular gear and a belt-shaped gear (for example, a rack and pinion mechanism). Reciprocates. The electric drill is attached so that the drill blade faces downward, and the drill blade directly applies an impact force (for example, 100 kg / cm ² ) from above the clinker to crush and drop the clinker.

  The moving means 6 includes a first moving means 6a attached to the first support bar 1a and a second moving means 6b attached to the second support bar 1b. The moving means 6a (6b) is a pair of pulleys 9a1, 9a2 (9b1, 9b2) provided at both ends of the support rod 1a (1b), and an endless shape spanning the pulleys 9a1, 9a2 (9b1, 9b2). The belt member 10a (10b) and a motor (not shown) attached to the pulleys 9a1, 9a2 (9b1, 9b2). One end of the moving shaft 4 is attached to the belt member 10a of the first moving means 6a via an attachment member 11a including a winding rope 12a and a motor 13a with a pulley, and the other end of the moving shaft 4 is 2 It is attached to the belt member 10b of the moving means 6b via an attachment member 11b comprising a winding rope 12b and a motor 13b with pulley.

  1st support bar 1a and 2nd support bar 1b, a pair of connection means 8, movement axis 4, crushing means 5, movement means 6a and 6b, and 1st-4th drooping members 7a-7d The crushing portion 50 that crushes the clinker with the mounting members 11a, 11b, and the four tow ropes 3a, 3b, 3c, 3d and the first to fourth ring bodies 2a, 2b, 2c, 2d, A tow rope operation unit 51 is configured to move the crushing unit 50 in the vertical direction and the horizontal direction.

  The first ring body 2a, the third ring body 2c, the second ring body 2b, and the fourth ring body 2d are connected to each other via the connecting means 8, and the first ring body 2a and the second ring body 2b are connected to the first ring body 2a and the second ring body 2b. A second support bar 1b is attached to the support bar 1a, the third ring body 2c, and the fourth ring body 2d. For this reason, no matter what angle the four tow ropes 3a, 3b, 3c, 3d are stretched, a quadrangular shape with the four points of the first to fourth ring bodies 2a, 2b, 2c, 2d as vertices Can be maintained.

  Further, the moving shaft 4 can reciprocate between one end and the other end of the first and second support rods 1 a and 1 b, and the crushing means 5 provided on the moving shaft 4 has both ends of the moving shaft 4. Can be moved in the axial direction. Thereby, the crushing means 5 can move in the axial direction of the moving shaft 4 and the direction orthogonal thereto. Furthermore, when the first to fourth tow ropes 3a to 3d are loosened or towed, the crushing portion 50 can be moved up and down as a whole, and the crushing means 5 moves up and down. That is, by operating the tow ropes 3a to 3b, remote operation can be performed from the outside of the boiler furnace, and the crushing means 5 can move in three axial directions. Moreover, the crushing means 5 can be similarly moved by remotely operating the tow ropes 3c and 3d from the rear of the boiler.

  Next, using the deposit removing apparatus according to the first embodiment of the present invention, remote operation is performed from the outside of the boiler furnace 100 to remove the clinker 102 attached to the secondary superheater tube 101 inside the boiler furnace 100. How to do will be described. FIG. 3 is a plan view of the inside of the boiler furnace 100. The boiler furnace 100 is provided with a plurality (seven in this embodiment) of front fixing parts (viewing windows in this embodiment) 103a to 103g at equal intervals. ing. Further, along the direction in which the viewing windows 103a to 103g are arranged inside the boiler furnace 100, a plurality of (in this embodiment, 10) secondary superheater tubes 101a to 101j are formed at equal intervals. It is arranged. Further, at the rear of the secondary superheater tubes 101a to 101j, the tertiary superheater tube 106, the screen tube 107, and the fourth superheater tube are spaced at a higher density (about 1/4) than the secondary superheater tubes 101a to 101j. 108 is disposed, and one manhole is provided on each of the left and right sides of the boiler.

  First, as shown in FIG. 3, on the outside of the boiler furnace 100, drums 105a and 105b are installed in the vicinity of two adjacent observation windows 103a and 103b, respectively, and a rear fixed portion on the opposite side of the observation windows 103a and 103b ( In this embodiment, drums 105c and 105d are respectively installed in the vicinity of the fourth superheater tube) 104a and 104b. The drum 105a has a first traction rope 3a, the drum 105b adjacent to the drum 105a has a second traction rope 3b, the drum 105c facing the drum 105a has a third traction rope 3c, and the drum 105d adjacent to the drum 105c has a fourth. The tow rope 3d is fixed so that it can be wound.

  Thereby, as shown in FIG. 3, the first tow rope 3a and the second tow rope 3b are respectively stretched from one of the observation windows 103a and 103b provided in the boiler furnace, and the third tow rope 3c. The fourth tow rope 3d is stretched from the rear fixing portions 104a and 104b, and the crushing portion 50 is suspended from the tow rope operating portion 51 as shown in FIG.

  At this time, the interval between the observation windows 103 and 104 and the secondary superheater pipe 101 is not the same interval (secondary superheater pipe> observation window), and the secondary superheater pipe is provided in front of the observation windows 103 and 104. Since 101 is not provided, the attachment angle of the traction rope 3 in a plan view may be in a state of being opened from the secondary superheater tube 101 toward the viewing window 103 as shown in FIG. By adopting the configuration as in the present invention, the first to fourth ring bodies 2a, 2b, 2c, and 2d can be operated regardless of the angle at which the four tow ropes 3a, 3b, 3c, and 3d are stretched. A quadrangle with 4 points as vertices can be maintained.

  By operating the tow ropes 3a, 3b, 3c and 3d, as shown in FIG. 4A, the adjacent secondary superheater tubes 101a and 101b are connected to the first support rod 1a and the second support in a plan view. The crushing part 50 is positioned below the lower ends of the secondary superheater tubes 101a and 101b so as to be surrounded by the rod 1b and the pair of connecting means 8. Thereafter, the tow ropes 3a, 3b, 3c and 3d of the operation unit 51 are pulled to raise the crushing part 50 as shown by the arrow in FIG. 4 (a), and as shown in FIG. The drill blade of the crushing means 5 is made to correspond to the upper side of the clinker 102 attached to one surface side (front side in FIG. 4) of the secondary superheater tube 101a.

  As shown by the arrow in FIG. 4B, the drill blade applies an impact force directly from above the clinker 102 while moving the crushing means 5 along the moving shaft 4 to crush and drop the clinker 102. That is, the crushing means 5 moves horizontally from one end of one secondary superheater tube 101a to the other end of the clinker 102 attached to one surface of the secondary superheater tube 101a. Remove the upper clinker.

  Next, as shown by the arrow in FIG. 4 (c), the traction ropes 3a, 3b, 3c and 3d of the operation unit 51 are loosened to lower the crushing part 50, and as shown in FIG. The drill blade of the crushing means 5 is made to correspond above the clinker 102 attached to one surface side of the secondary superheater tube 101a.

  As shown by the arrow in FIG. 4D, the drill blade applies an impact force directly from above the clinker 102 while moving the crushing means 5 along the moving shaft 4 to crush and drop the clinker 102. As a result, the clinker 102 attached further downward is removed from the clinker 102 attached to the one surface side of the secondary superheater tube 101a. Thus, if it repeats FIG.4 (b)-(d), the clinker 102 adhering to the one surface side of the secondary superheater pipe | tube 101a can be removed. Further, by operating the attachment member 11, the winding rope 12 of the support rod 1, and the motor 13 with pulley, the level of the crushing means 5 and the moving shaft 4 can be controlled without operating the tow rope operating portion 51 (up and down). )can do.

  When the clinker 102 adhering to one surface side of the secondary superheater tube 101a is removed, the crushing means 5 is positioned below the lower end of the secondary superheater tube 101a as shown in FIG. 4 (e). Thereafter, the tow ropes 3a and 3b are once loosened to move the moving shaft 4 to the other surface side of the secondary superheater tube 101a, and as shown by the arrows in FIG. 4 (f), the tow ropes 3a, 3b, 3c and 3d. The crushing part 50 is raised again on the other surface side (the back side in FIG. 4) of the secondary superheater tube 101a, and above the clinker 102 attached to the other surface side of the secondary superheater tube 101a, The drill blade of the crushing means 5 is made to correspond.

  If the other surface side of the secondary superheater tube 101a is also repeatedly performed as shown in FIGS. 4B to 4D, the clinker 102 attached to the other surface side of the secondary superheater tube 101a can be removed.

  When the clinker 102 attached to the other surface side of the secondary superheater tube 101a is removed, the crushing means 5 is positioned below the lower end of the secondary superheater tube 101a as shown in FIG. 4 (g). Thereafter, as shown by the arrows in FIG. 4G, the moving means 6a and 6b are driven to move the moving shaft 4 to one end of the first and second support rods 1b and 1b (front side of FIG. 4). Side) to the other end (back side in FIG. 4). Thereby, as shown in FIG.4 (h), the crushing means 5 is located in the downward side of the lower end part of the other secondary superheater pipe | tube 101b.

  Thereafter, as shown by the arrows in FIG. 4 (h), the towing ropes 3a, 3b, 3c, 3d are pulled to raise the crushing section 50, and as shown in FIG. 4 (i), the other secondary superheater. The drill blade of the crushing means 5 is made to correspond to the upper side of the clinker 102 attached to one surface side (front side in FIG. 4) of the tube 101b. And also about the secondary superheater pipe | tube 101b, if it repeats FIG.4 (b)-(g), the clinker 102 adhering to both surfaces of the secondary superheater pipe | tube 101b can be removed.

  The clinker 102 adhering to the secondary superheater tubes 101c to 101j can be removed by the same method as described above. Thus, since the crushing means 5 can apply the impact force directly to the clinker 102 and crush and drop the clogging means 5 in the present invention, the crushing means 5 can be installed in the boiler furnace in a short time without requiring a great effort. The clinker 102 can be removed. Moreover, since the crushing means 5 can be moved in the three-axis direction by performing a remote operation from the outside of the boiler furnace, it is safe with a simple configuration and the deposit removal efficiency is improved.

  In addition, since the crushing part 50 can be moved by operating the tow rope operating part 51, a position where the safety of the worker can be secured even without installing a scaffold inside the boiler (the observation window 103 and the rear fixing part). 104) can be removed by remote control. Thereby, safety is improved.

  FIG. 5 is a plan view showing the main part of the deposit removal apparatus according to the second embodiment of the present invention. The deposit removing apparatus according to the second embodiment includes a gripping unit 20 that causes the crushing unit 5 to approach the secondary superheater tubes 101a and 101b. The gripping means 20 includes a first gripping means 20 a provided on one end side of the moving shaft 4 and a second gripping means 20 b provided on the other end side of the moving shaft 4.

  The gripping means 20 is attached to the end of the moving shaft 4 and extends in a direction orthogonal to the moving shaft 4, and is attached to one end of the first shaft 21 and extends in parallel with the moving shaft 4. The second shaft portion 22, the third shaft portion 23 attached to the other end portion of the first shaft portion 21 and extending in parallel with the movement shaft 4, and the distal ends of the second shaft portion 22 and the third shaft portion 23, respectively. The gripping member 24 is provided and a motor 25 is provided. The first shaft portion 21, the second shaft portion 22, the third shaft portion 23, and the gripping member 24 are integrally formed in a U shape, and as indicated by the arrow in FIG. It reciprocates integrally in a direction orthogonal to the moving shaft 4. The second shaft portion 22 and the third shaft portion 23 of the gripping means 20 are open when the crushing means 5 is at the end of the moving shaft, and are closed otherwise.

  As shown in FIG. 5A, when the secondary superheater tube 101 is positioned between the moving shaft 4 and the second shaft portion 22, the motor 25 is driven to drive the first shaft portion 21 and the second shaft. The secondary superheater tube 101 is gripped by the moving shaft 4 and the grip portion 24 provided on the second shaft portion 22 by moving the portion 22 and the third shaft portion 23. Thereby, the crushing means 5 can be brought close to the secondary superheater tube 101.

  5B, when the secondary superheater tube 101 is positioned between the moving shaft 4 and the third shaft portion 23, the motor 25 is driven to drive the first shaft portion 21, The second superheater tube 101 is gripped by the moving shaft 4 and the gripping portion 24 provided on the third shaft portion 23 by moving the two shaft portions 22 and the third shaft portion 23. Thereby, the crushing means 5 can be brought close to the secondary superheater tube 101.

  As shown in FIG. 6, the grip portion 24 includes a pair of bearings 25, a roller 26, and a vibrator 27. Accordingly, when the second shaft portion 22 and the third shaft portion 23 move up and down while the roller 26 is in contact with the secondary superheater tube 101, the roller 26 rotates following the movement. Thereby, even when the gripping portion 24 is in contact with the secondary superheater tube 101, the resistance by the gripping portion 24 can be reduced.

  Thus, the deposit removal device of the second embodiment can achieve the same operational effects as the deposit removal device of the first embodiment. In particular, since the crushing means 5 can be brought close to the secondary superheater pipe 101 by the gripping means 20, the crushing means 5 can remove the clinker 102 from the vicinity of the surface of the secondary superheater pipe 101, and the electric motor Since the impact force of the drill can be reliably transmitted to the attached clinker, the clinker can be efficiently crushed and removed. Further, since the vibrator 27 can be vibrated after the crushing means 5 crushes the clinker 102, the residual clinker and the fine clinker can be peeled and removed, and the removal accuracy is improved.

  While the embodiments and examples of the present invention have been described above, the present invention is not limited to these and various modifications can be made. For example, a camera may be provided in the openings 103 and 104 and the crushing unit 50, and the operation unit 51 may be operated while checking with the camera. The material of each constituent member such as the support rod 1, the ring body 2, the tow rope 3, the moving shaft 4 and the like can be selected arbitrarily in consideration of strength, weight, heat resistance, and the like.

DESCRIPTION OF SYMBOLS 1 Support rod 2 Ring body 3 Tow rope 4 Moving shaft 5 Crushing means 6 Moving means 9 Pulley 10 Belt member 20 Grasping means 27 Vibrator 100 Boiler furnace 101 Secondary superheater pipe 102 Clinker 103 Front fixing part 104 Rear fixing part

Claims (5)

A deposit removing device for removing deposits made of coal combustion ash adhering to a boiler furnace,
A first support bar and a second support bar disposed to face each other;
A first ring body provided above one end portion of the first support rod, a second ring body provided above the other end portion of the first support rod, and a second support rod A third ring body provided above one end, and a fourth ring body provided above the other end of the second support rod;
First, second, third, and fourth string members respectively fixed to the first, second, third, and fourth ring bodies;
Extending in a direction orthogonal to the first support rod and the second support rod, reciprocating between one end of the first and second support rods and the other end of the first and second support rods. A moving axis;
A crushing means for crushing deposits by reciprocating along the axial direction on the moving shaft,
The first string member and the second string member are stretched from a front fixing part provided in a boiler furnace, and the third string member and the fourth string member are on the opposite side of the front fixing part. A deposit removing device, wherein the deposit removing device is stretched from a rear fixing portion provided.   The moving means includes a moving means for moving the moving shaft, and the moving means is composed of a pair of pulleys provided at both ends of the support rod, and an endless belt member spanned around the pulley. The deposit removing apparatus according to claim 1, wherein an end portion is fixed to the belt member.   The said crushing means was comprised with the electric drill, The deposit | attachment removal apparatus of Claim 1 or Claim 2 characterized by the above-mentioned.   The attachment removing apparatus according to any one of claims 1 to 3, further comprising gripping means for gripping the adherend with the moving shaft.   5. The deposit removing apparatus according to claim 4, wherein the gripping means includes a vibrator.

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