JP2011169486A - Method and device of cleaning asbestos and the like for chimney - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device of cleaning asbestos and the like for a chimney, capable of easily performing treatment after separation in a simple treatment work in a short time. <P>SOLUTION: In this method of cleaning asbestos by descendably suspending a high pressure injection device body 2 including an injection nozzle 3 for injecting high pressure injection liquid, and gradually descending the same in the chimney 50 while injecting the high pressure injection liquid from the injection nozzle 3, the high pressure injection device body 2 is provided with a reaction force receiving member 7 in contact with an inner wall surface 55 of the chimney 50 at its tip section, on a peripheral edge section, a mixture liquid including a penetrant and a capture agent is used as the high pressure injection liquid, the asbestos and the like attached to the inner wall surface 55 is separated by the injection of high pressure injection liquid, and the separated asbestos and the like is taken into the injected mixture liquid, and dropped to the bottom of the chimney. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cleaning method for asbestos and the like adhering to an inner wall surface of a chimney, and a cleaning device used therefor.

  In recent years, the removal of asbestos used on the walls and ceilings of buildings and various structures has become a social problem. Asbestos is also sprayed on the inner wall surface of a chimney of a factory or the like, and soot containing dioxin, soot containing heavy metal, or the like adheres to the inner wall surface as an incineration residue. Accordingly, when such a chimney is dismantled or cleaned, removal of the asbestos, the soot, etc. (in this specification and claims, simply “asbestos etc.”) becomes a problem. Yes.

The removal of asbestos and the like adhering to the inner wall surface of such a chimney is different from the removal of asbestos adhering to the ceiling surface and wall surface of the room. In other words, in the case of the room, it is sufficient to close the doorway and the like in the room with a vinyl sheet or the like and reduce the pressure so that an operator enters the space and removes asbestos. However, in the case of a chimney, work is performed in a narrow cylindrical space that extends long up and down, and all asbestos attached to the inner wall surface due to gravity falls at a high speed on the bottom surface of the chimney. , Soaring, etc. For this reason, it is difficult to keep the state where the bottom of the chimney is completely closed, and there is a special situation that even if it is initially closed, the sealed state is damaged by the asbestos that has dropped.
Under these circumstances, at present, the most primitive removal work is that an operator wearing a protective suit enters the chimney and scrapes it downward using a tool such as a scraper.
However, such a method becomes a work in a tight and narrow space where the worker can hardly move, and also imposes dangerous and poor heavy labor. In addition, it was supposed that asbestos was scattered to the atmosphere side.
Under such circumstances, in recent years, a plurality of scaffolds are assembled at appropriate intervals in the vertical direction of the chimney (for example, at intervals of 3 m), and holes are formed from the periphery of the chimney at the site where each scaffold is formed. Is inserted into the chimney, high pressure water of about 80 MPa is sprayed from the nozzle, and the asbestos and the like are peeled off from the inner wall surface for cleaning.
However, in any of the above methods, asbestos or the like adhering to the inner peripheral surface of the chimney falls to the bottom surface of the chimney at a high speed, soars around the bottom surface, and there is a possibility that it will be scattered around the surroundings. Such removal work should be improved.

  In addition, in order to release the worker from harsh work, as another method, to remove asbestos attached to the inner wall surface of the chimney, insert a cleaning device equipped with an injection nozzle from the opening of the chimney top, A method has been proposed in which pressure water (ultra-high pressure water) of 150 to 250 MPa is rotated from the injection nozzle while rotating in the radial direction to remove asbestos and the like on the inner wall surface of the chimney (Patent Document 1).

JP 2009-52236 A.

  However, when the asbestos and the like are peeled off from the inner wall surface by spraying the ultra-high pressure water, asbestos and the like having low hydrophilicity are scattered in large quantities from above the chimney and the like, and the bottom of the chimney is caused by the fall of the pressure water. As a result, the peeled asbestos and the like accumulate together with the large amount of water at the bottom of the chimney. In such a case, post-treatment of a large amount of water mixed (floating) with asbestos is difficult.

  As described above, according to the conventional method, ancillary work such as assembly and disassembly work of a large scale is required, which increases the cost and requires a long work period. Moreover, the post-treatment of water containing a large amount of asbestos has become troublesome. And he was forced to perform harsh work on the worker.

  The present invention has been made in view of such a situation, and a method and apparatus for cleaning asbestos etc. of a chimney that can easily process asbestos after peeling and can perform a processing operation in a simple and short period of time. The purpose is to provide.

The method of cleaning the asbestos of the chimney according to the present invention,
An injection nozzle that injects high-pressure injection liquid toward the inner wall surface of the chimney to which asbestos or the like to be cleaned is attached, and a high-pressure liquid supply tube having a base end connected to a high-pressure pump is connected to the injection nozzle. The main body of the high-pressure injection device provided with the high-pressure liquid supply port for supplying the injection liquid is suspended from above so that the inside of the chimney can be lowered while gradually injecting the high-pressure injection liquid from the injection nozzle. In the cleaning method such as asbestos of the chimney that lowers and cleans the inner wall of the chimney,
The high-pressure injection device main body comprising, as the high-pressure injection device main body, a reaction force receiving member that receives a reaction force generated due to the injection of the high-pressure injection liquid at the peripheral portion of the high-pressure injection device main body and contacting the inner wall surface of the chimney And use
Using a mixed liquid containing a penetrant and a scavenger as the high-pressure jet liquid,
The asbestos adhering to the inner wall of the chimney is peeled off by the injection of the high-pressure jet liquid, and the peeled asbestos is taken into the jetted liquid mixture and dropped to the chimney bottom. And

Thus, according to the present cleaning method configured as described above, the main body of the high-pressure injection device in which the reaction force receiving member is arranged is inserted into the chimney from the upper opening, and the reaction force receiving member is used on the inner wall surface of the chimney. In a state where the reaction force resulting from the injection of the high pressure injection device main body can be received, the high pressure injection device main body is gradually lowered below the chimney while the mixed liquid is injected at a high pressure from the injection nozzle. In the state where the reaction force resulting from the injection of the high-pressure injection liquid is received by the reaction force receiving member, the injection of the high-pressure injection liquid is carried out effectively, and asbestos adhering to the inner wall surface of the chimney is injected. The inside of the chimney can be cleaned by being peeled off from the inner wall surface of the chimney and falling to the bottom without being scattered around the chimney while being wetted by the liquid and trapped in the liquid mixture.
Further, the high-pressure jet liquid composed of the mixed liquid having a large mass is placed on the portion of the high-pressure jet main body in a stable state in which the reaction force is offset by the reaction force receiving member at a site where asbestos or the like is attached. Since injection is performed at a high pressure from the injection nozzle, it can be effectively peeled off by injection at a lower pressure than when water is used as a conventional injection liquid. In addition, according to the present invention, the peeled asbestos is surely taken into the mixed solution, and therefore, there is an advantage that it is possible to perform a removal operation with little scattering into the air and without waste. .

  In the cleaning method for the chimney asbestos and the like, the main body of the high-pressure injection device has a fixed portion and a rotating portion that can rotate with respect to the fixed portion. Without disposing a special drive device for rotating the rotating portion by disposing the reaction force receiving member in the fixed portion and arranging the reaction force receiving member in a state deviated slightly in the circumferential direction. When a high-pressure injection device body is used that rotates (rotates) the rotating portion with respect to the fixed portion by the reaction force of the high-pressure injection liquid from the high-pressure injection device main body, The inner wall surface of the chimney can be washed evenly in the circumferential direction simply by supplying the high-pressure jet liquid to the tank. Therefore, at the time of cleaning, the main body of the high-pressure injection device having a simple configuration can be efficiently cleaned from the upper end portion to the lower end portion of the chimney simply by lowering the main body.

  In the cleaning method for chimney asbestos and the like, prior to cleaning the inner wall surface of the chimney by the main body of the high-pressure jet, at least the inner wall surface in the range of 1 to 3 m from the tip of the chimney is mixed with the penetrant and the scavenger. As a pre-process for spraying the asbestos, it is possible to more effectively prevent asbestos and the like from splashing outward from the opening of the chimney tip immediately after the start of cleaning by the high-pressure injection device body. Of course, the mixed liquid may be sprayed from the upper end to the lower end of the chimney.

  In the chimney asbestos cleaning method, prior to cleaning the inner wall surface of the chimney by the main body of the high-pressure injector, if a water absorbing agent is put on the bottom of the chimney, the asbestos that falls off from the upper part is trapped. The mixed liquid can be effectively made into a gel, and if such a gel is contained in a processing bag, it can be processed easily.

Moreover, it is a cleaning apparatus used in a cleaning method for chimney asbestos and the like according to the present invention,
Such a cleaning device has a high-pressure injection device body that injects a mixed liquid containing a penetrant and a scavenger at a high pressure on the inner wall surface of the chimney,
The main body of the high-pressure injection device has a reaction force receiving portion that receives a reaction force generated due to the injection of the high-pressure injection liquid with the tip portion contacting the inner wall surface of the chimney at the peripheral portion thereof, and a high-pressure liquid supply tube A fixed portion having a high-pressure liquid supply port to which a tip is connected and high-pressure spray liquid is supplied;
At least a pair arranged so as to be rotatable with respect to the fixed portion and paired with the rotation center axis, and in a state inserted in the chimney, in a circumferential direction within a predetermined range with respect to the radial direction of the chimney And a rotating part equipped with an injection nozzle that injects the high-pressure injection liquid onto the inner wall surface of the chimney.

Thus, according to the present cleaning apparatus configured as described above, the above-described cleaning method for asbestos of a chimney can be effectively executed. That means
According to the present cleaning device, when the high-pressure jet body is suspended from the space above the chimney by a wire or the like in the chimney and the high-pressure jet liquid is jetted from the jet nozzle, the fixing portion receives the reaction force. The member is fixed to the inner wall surface of the chimney by the member, and the rotating part starts to rotate by the reaction force generated due to the injection of the high pressure injection liquid from the injection nozzle, and the mixed liquid does not move toward the inner wall surface of the chimney by the rotation. The high-pressure jet liquid consisting of is sprayed in the circumferential direction, and asbestos and the like adhering to the inner wall surface of the chimney are peeled and washed.
For this reason, the high-pressure jet liquid from the jet nozzle can effectively peel off asbestos and the like.
And, in such a state of being injected, if the main body of the high-pressure injection device is gradually lowered downward, the inner wall of the chimney can be easily washed from the upper end to the lower end without scattering asbestos or the like outside. Is possible.

  In the cleaning device, when the lance rod having the injection nozzle at the tip and the base end connected to the rotating body is bent at a predetermined angle at a halfway portion, the lance rod itself is rotated by a predetermined angle. If it does, it becomes a structure which can change the injection direction of the high pressure injection liquid from an injection nozzle, and can change a rotational force and an injection direction suitably according to the condition of the dirt in a chimney.

  According to the chimney asbestos cleaning method and cleaning device configured as described above, it is possible to easily handle asbestos after peeling, and to provide a simple scaffolding on the upper end of the chimney, and in a short period of time. Asbestos attached to the inner wall of the chimney can be peeled off and washed. Further, post-treatment such as asbestos after washing can be easily performed.

It is a perspective view which shows the whole structure of the washing | cleaning apparatus concerning the Example of this invention. It is a side view of the washing | cleaning apparatus shown in FIG. It is a side view which shows the whole structure of the washing | cleaning apparatus of a structure different from FIG. It is a schematic diagram of a chimney to be cleaned and a cleaning device arranged in the cleaning operation.

Hereinafter, a method and apparatus for cleaning an asbestos of a chimney according to an embodiment of the present invention will be specifically described with reference to the drawings.
(Example)
1 and 2, A is a cleaning device, and the cleaning device A includes a high-pressure injection device main body 2. The high-pressure injection device main body 2 has a suspension portion 2a at its upper end suspended from above by a wire or the like (not shown). As a result, the inside of the chimney can be moved up and down (movable). Further, the cleaning device A has a high-pressure pump P that supplies a high-pressure jet liquid to the high-pressure jet main body 2 at a remote location.

  The high-pressure injection device body 2 includes a fixed portion 2A at the upper portion and a rotating portion 2B at the lower portion.

  At least a pair of lance rods 3B are arranged in the rotating portion 2B of the high pressure injection device body 2 symmetrically with respect to the rotation center axis O1 so that the longitudinal direction thereof extends in the radial direction. At each tip, an injection nozzle 3 for injecting high-pressure injection liquid onto the inner wall surface 55 (see FIG. 4) of the chimney 50 (see FIG. 4) is disposed. The lance rod 3B is slightly curved (bent) with respect to the longitudinal direction at the distal end portion (which may be the central portion or the proximal end portion), and somewhat with respect to the radial direction of the chimney 50 shown in FIG. It has a form deviated in the circumferential direction and slightly inclined downward with respect to the vertical direction of the chimney 50. In the case of this embodiment, the bending angle is such that the distal end side of the curved portion is bent about 15 degrees with respect to the proximal end side. The bending angle is preferably about 5 to 40 degrees, and more preferably about 10 to 30 degrees. However, if it curves as mentioned above, it will become the composition which can satisfy the basic operation effect of the present invention.

The high-pressure injection device main body 2 further includes a rotary joint (in FIGS. 1 and 2) that is fluidly connected between the fixed portion 2A and the rotating portion 2B below the fixed portion 2A so as to be rotatable and in a liquid-tight state. Cannot be seen from the outside).
The fixed portion 2A has a high pressure liquid supply port 6 for supplying a pressurized mixed liquid (high pressure injection liquid), and the high pressure injection liquid supplied from the high pressure liquid supply port 6 is connected to the rotary joint. It is possible to guide to the rotating body 2B side.

Further, the fixed portion 2A includes a reaction force receiving portion 7 that receives a reaction force caused by the rotation of the rotating portion 2B. The reaction force receiving portion 7 is provided at a plurality of locations in the circumferential direction (with an equal interval in the circumferential direction in this embodiment) in order to keep the fixing portion 2A in a non-rotating state with respect to the inner wall surface 55 of the chimney 50 7A and 4B, and an arm member 7B that swingably supports each contact member 7A. The base end of the arm member 7B is pivotally supported by a columnar portion 2F extending in the direction of the rotation center axis O1.
Further, in the case of this embodiment, the contact member 7A is formed with a mounting portion 7a for pivotably mounting with the arm member 7B at the center in the vertical direction. 7 A of contact members exhibit the state which the upper end part 7u is located in an outer diameter direction, and the lower end part 7d is located in an inner diameter direction with dead weight in the state suspended in the chimney. Further, in the attachment portion 7a, the attachment shaft (attachment bolt) is arranged so as to be orthogonal to the radial direction, but instead of the orthogonal direction, the rotation direction rearward with respect to the rotation direction of the rotation portion 2B. Thus, it may be arranged slightly obliquely so as to be located on the inner diameter side in the radial direction from the front side in the rotation direction. Such a configuration is a preferable configuration in that the rotation of the fixed portion 2A is effectively prevented, and the movement (lifting / lowering) of the high-pressure injection device main body 2 in the longitudinal direction of the chimney 50 is facilitated.
In the case of this embodiment, the reaction force receiving portion 7 has the contact member 7A and the arm member 7B in two stages so as to be separated from each other vertically, and between the upper and lower arm members 7B, The connecting arms 7C are connected to each other.
Each of the lower arm members 7B is connected to a fixed arm 7D that is pivotally supported at a position different from the arm member 7B in the vertical direction of the fixed portion 2A. On the other hand, the positions (tilt angles) of all the arm members 7B are determined. That is, according to the inner diameter of the chimney, the fixed arm 7D and the arm so that the contact member 7A can contact with a predetermined angle (for example, an angle of about 5 to 30 degrees from the parallel state). The connection position of the member 7B can be adjusted (changed). That is, the radial position of the contact member 7A is determined by the position of the elongated hole 7d of the fixed arm 7D where the arm member 7B is fixed. Specifically, in the embodiment shown in FIG. 2, the radial position of the contact member 7A becomes closer to the center as the arm member 7B is fixed to the distal end side of the fixed arm 7D.
Further, as another embodiment, it can be configured as shown in FIG. 3, and in such a case, the arm member 7B is fixed to the distal end side of the fixed arm 7D contrary to the case of FIG. The closer the position in the radial direction of the contact member 7A, the closer to the outer diameter side away from the center. The configuration of the reaction force receiving member 7 shown in FIGS. 2 and 3 can be freely used, and the same effects can be obtained regardless of which one is selected. 3 that are the same as or correspond to those in FIG. 2 are assigned the same reference numerals, and descriptions thereof are omitted.

  In the rotating portion 2B, the base end of the lance rod 3B is connected to a portion that becomes the housing 5B of the rotating portion of the rotary joint, and a high pressure liquid supply path is connected to the connecting portion of the lance rod 3B of the housing 5B. The high pressure injection liquid is supplied to the lance rod 3B side from the rotating part of the rotary joint. The high-pressure spray liquid is supplied to the spray nozzle 3 attached to the tip of the high-pressure spray liquid via the lance rod 3B.

Further, in the case of this embodiment, the housing 5B has a rectangular shape in plan view having a predetermined thickness. A pair of the lance rods 3B are screwed onto the opposing side surfaces of the rectangular shape as described above. Then, if the lance rod 3B curved at the front end portion and screwed to the housing 5B is appropriately rotated by a predetermined angle in the screwing direction or the loosening direction, as described above, the injection nozzle The direction of the injection of 3 can be arbitrarily deviated in the circumferential direction and / or in the vertical direction.
In the case of this embodiment, a pair of guard members 9 extending in parallel to the lance rods 3B and extending from the tip of the lance rods 3B to the outer diameter are attached to the pair of housings 5B. The lance rod 3B is configured to be protected when rotating.

Further, a high-pressure liquid supply path (not shown) is formed in the fixed portion 2A, and the base end of the high-pressure liquid supply path is connected to the high-pressure liquid supply port 6 and the distal end of the high-pressure liquid supply path Is connected to a high-pressure liquid supply passage (not shown) of the rotating part 2B through the rotary joint, and is connected to the injection nozzle 3 through the lance rod 3B.
As a result, a high-pressure spray liquid is supplied from the high-pressure liquid supply port 6 to the spray nozzle 3.

Further, as shown in FIG. 4, the high-pressure liquid supply port 6 is connected to the distal end of a high-pressure liquid supply tube 11 whose base end is connected to the discharge port side of the high-pressure pump P. The high-pressure jet liquid discharged from the P discharge port side is supplied to the high-pressure jet body 2 through the high-pressure liquid supply tube 11.
As shown in FIG. 4, the liquid suction port (water suction port) of the high-pressure pump P is connected to the tank 80 side through the water suction pipe 12.

Therefore, the cleaning apparatus A according to the present invention configured as described above can remove asbestos and the like attached to the inner wall surface of the chimney by performing the following cleaning method when cleaning the chimney. That means
At the time of cleaning the chimney, as shown in FIG. 4, a water absorbing agent is sprinkled on the bottom surface 51 of the chimney 50. And the opening 52 of the bottom part of a chimney is obstruct | occluded with respect to the external air side with a vinyl sheet etc.
As the water absorbing agent, in this example, the trade name “EB-800HS” (■ Ecobond:
The head office uses 164 Kawato, Tojo-cho, Shobara City, Hiroshima Prefecture, 19). The main component of EB-800HS is an acrylic acid polymer partial sodium salt. However, the water-absorbing agent is not limited to the above-mentioned water-absorbing agent, and any water-absorbing agent can be used as long as it can exhibit the same action (the action of effectively making a mixed liquid containing captured asbestos and the like a gel). Others may be used.

  Further, as shown in FIG. 4, a scaffold 70 having a winch (not shown) 60 is constructed on the chimney 50.

  Subsequently, prior to the cleaning of the chimney inner wall surface by the high pressure injection device main body 2, at least the upper end portion 53 of the chimney 50, that is, the inner wall surface in the range of 1 m to 3 m from the tip is mixed with the penetrant and the scavenger. The liquid is sprayed by using a low-pressure gun (not shown) (referring to a gun sprayed with a force of about 0.1 to 1.0 MPa) to wet asbestos and the like. Of course, the spraying may be performed from the upper end to the lower end of the chimney 50.

  Then, the high-pressure cleaning device main body 2 is lifted on the scaffold 70. And the said suspension part 2a of this high-pressure washing apparatus main body 2 is connected with the winding wire 61 of the said winch 60. FIG.

  Next, as shown in FIGS. 1 and 2, the contact member 7A of the high-pressure injection device main body 2 matches the inner diameter of the chimney to be cleaned, that is, the contact member 7A is centered on the attachment portion 7a. In the state where the upper end portion 7u and the lower end portion 7d are positioned at the same position in the radial direction, the fixed arm 7D and the arm member 7B are connected so that the contact member 7A matches the inner diameter of the chimney. In terms of work efficiency, such setting work is preferably performed on the ground before the high-pressure injection device body 2 is lifted onto the scaffold.

  Then, as shown in FIG. 4, the high-pressure liquid supply port 6 of the high-pressure washing apparatus main body 2 and the discharge port of the high-pressure pump P of the work vehicle disposed in the vicinity of the chimney are connected via the high-pressure liquid supply tube 11. Connect.

As the high-pressure jet liquid, a mixed liquid containing a penetrant and a scavenger is used.
In this example, as the penetrant, the trade name “EB-Eco Dash B” (■ Eco Bond: Head Office, 164 Kawato, Tojo-cho, Shobara-shi, Hiroshima, 19) is used. The main components of EB-Eco Dash B are a nonionic surfactant, an anionic surfactant, and a polyhydric alcohol mixture.
In addition, as the scavenger, the trade name “EB-2000WJ” (■ Eco Bond: Head Office, 164 Kawato, Tojo-cho, Shobara-shi, Hiroshima, 19) is used. The main component of such EB-2000WJ is acrylamide / acrylic acid / 2-acryloylamino 2-methylpropanesulfonic acid polymer sodium salt. However, other penetrants and scavengers may be used as long as they can exhibit the same action (referring to the action of wetting asbestos and the like and enveloping the asbestos and the like separated in the mixed solution).
The mixing ratio of the penetrant and the scavenger is approximately 1 ml of EB-Eco Dash B and 12 ml of EB-2000WJ with respect to 1 liter of water. The specific gravity is about 1 or more. Regarding the mixing ratio, the EB-Eco Dash B may be used in a ratio of about 0.1 ml to 10 ml and the EB-2000WJ in a ratio of about 4.0 ml to 30 ml with respect to 1 liter of water. . More preferably, the EB-Eco Dash B is used in a ratio of about 0.5 ml to 1.5 ml and the EB-2000WJ is used in a ratio of about 9 ml to 15 ml with respect to 1 liter of water.

  As shown in FIG. 4, the high-pressure jet liquid is accommodated in a tank 80 placed on a work vehicle or the ground. The tank 80 is connected to the liquid suction port of the high-pressure pump P.

Through such a preparation process, as shown in FIG. 4, the high-pressure injection device body 2 is inserted into the chimney 50 by the winch 60 and the high-pressure pump P is operated. When the high-pressure pump P is operated in this way, the high-pressure jet liquid composed of the mixed liquid composed of the penetrant and the trapping agent is jetted from the jet nozzle 3 onto the inner wall surface of the chimney at an jet pressure of about 50 MPa. Is done.
If the injection pressure is about 30 MPa to about 80 MPa, the removal operation can be performed efficiently. More preferably, the injection pressure may be about 40 MPa to about 60 MPa.

  As a result of such injection, asbestos or the like adhering to the inner wall surface of the chimney is effectively peeled off. At the time of such peeling, scattering of the asbestos and the like into the atmosphere is suppressed as much as possible by wetting the asbestos and the like with the mixed solution and wrapping after peeling, and also with the above-described wetting by the mixed solution.

  Since the injection direction of the injection nozzle 3 is deviated in the circumferential direction in the radial direction as described above, the rotating body 2B starts rotating due to the reaction caused by the injection of the high-pressure injection liquid. At this time, the fixing portion 2A is fixed to the inner wall surface of the chimney in the circumferential direction because the contact member 7A of the reaction receiving portion 7 is in contact with the inner wall surface of the chimney. In particular, as described in this embodiment, the contact member 7A of the reaction receiving portion 7 can swing around the attachment portion 7a with respect to the arm member 7B. Even if the contact member 7A is slightly expanded compared to the upper end side, as described above, the contact member 7A swings around the attachment portion 7a with respect to the arm member 7B and expands in the radial direction. The reaction force receiving portion 7 has the contact member 7 </ b> A and the arm member 7 </ b> B that are separated in the vertical direction and are in contact with each other at a position separated in the vertical direction. At any position in the vertical direction of 55, the inner peripheral wall 55 is reliably contacted and fixed to the inner wall surface of the chimney 50.

  By the way, when it is desired to adjust the rotation speed of the rotating portion 2B, the lance rod 3B is rotated in the screwing direction or the loosening direction with respect to the housing 5B, thereby being displaced in the circumferential direction in the radial direction (injection direction). ) Can be changed to adjust the rotation speed of the rotating body 3B. It is desirable to increase the injection amount per predetermined cleaning area by slowing the rotation speed when asbestos or the like adhering to the inner wall surface 55 of the chimney 50 is difficult to peel off. The rotational speed of the rotating part 2B can be adjusted by adjusting the discharge pressure of the high-pressure pump P or the discharge amount per unit time even when the lance rod 3B is left as it is. .

  Further, since the injection direction of the injection nozzle 3 is arranged so as to deviate downward also in the vertical direction, asbestos and the like separated from the inner wall surface 55 of the chimney 50 are blown downward by the high-pressure injection liquid. When the asbestos or the like is difficult to peel off from the inner wall surface 55, the downward displacement may be caused to be ejected from an angle closer to orthogonal to the asbestos or the like by reducing the downward displacement. ,desirable.

  In addition, asbestos is previously sprayed with the mixed liquid containing the penetrant and the scavenger as described above, and as described above, the high-pressure jet liquid is jetted downward and the high-pressure jet liquid is injected into the asbestos. Since asbestos and the like are taken in, the jet of the high-pressure jet liquid does not scatter from the opening above the chimney to the atmosphere side.

In this state, if the wire 61 of the winch 60 is gradually extended in accordance with the cleaning operation, the main body 2 of the high-pressure injector 2 gradually moves below the chimney 50. As a result, asbestos or the like attached to the inner wall surface 55 of the chimney 50 is removed and falls to the bottom surface 51 of the chimney 50.
And the asbestos etc. which fell to the bottom face 51 of the said chimney become a gel form with the water-absorbing agent sown on the bottom face 51. Therefore, asbestos or the like that has fallen to the bottom of the chimney does not scatter from the bottom opening 52 to the outside air side.

  When the high pressure injection device main body 2 reaches the bottom surface 51 of the chimney 50, the winch 60 is stopped and the high pressure pump P is stopped.

  Therefore, next, if an operator packs the gel-like asbestos etc. on the bottom face 51 of the chimney 50 and transports it to a predetermined treatment facility, the asbestos etc. is hardly scattered to the atmosphere side. The chimney 50 can be cleaned.

  Further, the above-described embodiment is merely one embodiment of the present invention, and the present invention is not limited to the above-described embodiment, and can be implemented in various forms within the scope based on the technical idea of the present invention. It goes without saying that it becomes possible.

  The method and apparatus for cleaning chimney asbestos and the like according to the present invention can be used for cleaning chimneys and the like.

A ... Cleaning device
2 ... High pressure injection device
3 ... Injection nozzle
7 ... Reaction force receiving member
50 ... Chimney
55 ... inner wall of chimney

Claims (6)

An injection nozzle that injects high-pressure injection liquid toward the inner wall surface of the chimney to which asbestos or the like to be cleaned is attached, and a high-pressure liquid supply tube having a base end connected to a high-pressure pump is connected to the injection nozzle. The main body of the high-pressure injection device provided with the high-pressure liquid supply port for supplying the injection liquid is suspended from above so that the inside of the chimney can be lowered while gradually injecting the high-pressure injection liquid from the injection nozzle. In the cleaning method such as asbestos of the chimney that lowers and cleans the inner wall of the chimney,
As the high-pressure injection device main body, a reaction force receiving member that receives a reaction force generated due to the injection of the high-pressure injection liquid with the tip portion coming into contact with the inner wall surface of the chimney is disposed at the peripheral portion of the high-pressure injection device main body. And use
Using a mixed liquid containing a penetrant and a scavenger as the high-pressure jet liquid,
The asbestos adhering to the inner wall of the chimney is peeled off by jetting the high-pressure jet liquid, and the peeled asbestos is taken into the jetted liquid mixture and dropped to the chimney bottom. Cleaning method for asbestos and so on.   The main body of the high-pressure injection device has a fixed portion and a rotating portion that can rotate with respect to the fixed portion, and the injection nozzle is displaced in the rotating portion, and the injection direction is slightly displaced in the circumferential direction with respect to the radial direction of the chimney. The reaction force receiving member is arranged on the fixed portion, and the reaction of the injection of the high-pressure injection liquid from the injection nozzle is not provided without providing a special drive device for rotating the rotation portion. The asbestos or the like according to claim 1, wherein the main body is a high-pressure injection device main body configured to rotate with respect to a fixed portion fixed in a rotation direction with respect to the inner wall surface of the chimney by force. Cleaning method.   Prior to the cleaning of the inner wall surface of the chimney by the main body of the high-pressure jet, it has a preliminary step of spraying the mixed liquid containing the penetrant and the scavenger on at least the inner wall surface in the range of 1 to 3 m from the tip of the chimney. A method for cleaning asbestos or the like according to claim 1 or 2.   The cleaning method for asbestos or the like according to any one of claims 1 to 3, wherein a water absorbing agent is applied to the bottom of the chimney prior to cleaning the inner wall surface of the chimney by the main body of the high-pressure injection device. A cleaning apparatus for use in a cleaning method for asbestos or the like according to any one of claims 1 to 4,
Such a cleaning device has a high-pressure injection device body that injects a mixed liquid containing a penetrant and a scavenger at a high pressure on the inner wall surface of the chimney,
The main body of the high-pressure injection device has a reaction force receiving portion that receives a reaction force generated due to the injection of the high-pressure injection liquid with the tip portion contacting the inner wall surface of the chimney at the peripheral portion thereof, and a high-pressure liquid supply tube A fixed portion having a high-pressure liquid supply port to which a tip is connected and high-pressure spray liquid is supplied;
At least a pair arranged so as to be rotatable with respect to the fixed portion and paired with the rotation center axis, and in a state inserted in the chimney, in a circumferential direction within a predetermined range with respect to the radial direction of the chimney A rotating part equipped with an injection nozzle that is arranged in such a manner that the injection direction can be deflected and injects the high-pressure injection liquid onto the inner wall surface of the chimney;
A cleaning apparatus comprising:   6. The cleaning apparatus according to claim 5, wherein a lance rod having the spray nozzle at a tip and a base end connected to the rotating body is bent at a predetermined angle at a midpoint.

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