Asbestos removal device and asbestos removal method

Abstract

To provide an asbestos removal device capable of being carried into a narrow site, and capable of suppressing processing cost, and to provide an asbestos removal method using the device.SOLUTION: An asbestos removal device 1 is for removing asbestos from a structure S which has an asbestos layer C containing asbestos. Water W is supplied for preventing dispersion of asbestos, the asbestos layer C is peeled off using a removal part 2, and mixture M of a removed object R and the water W is received in a circulation part 3. The mixture M received in the circulation part 3 is filtered by a filter 321, and the water W acquired after filtering is supplied to the removal part 2 again. The water W acquired after filtering is not drained in a natural environment.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an asbestos removal device and an asbestos removal method. [Background technology]

[0002] Asbestos was widely used as a building material and insulation material in the past, but subsequent research has revealed its health risks and revealed the health damage associated with asbestos (lung cancer, mesothelioma, etc.). The number of mesothelioma patients, which is said to be a health damage caused by asbestos, continues to increase year by year, and according to vital statistics from the Ministry of Health, Labor and Welfare, 1,555 people died from mesothelioma in 2017, more than three times the number in 1995. In addition, looking at the number of cases in which compensation for workers' compensation was approved in fiscal 2017 by type of industry, the manufacturing and construction industries were the most common. For this reason, safe asbestos removal methods are considered important.

[0003] Asbestos can cause serious health damage to the lungs and other organs when inhaled. In particular, when asbestos dries and turns into dust, the fine fibers are released into the air and can easily be taken up by the lungs. The fibers are very small and can remain suspended in the air for a long time. Therefore, it is necessary to keep the material moist while working.

[0004] Asbestos removal methods include the water jet method, which uses high-pressure water or mist to remove asbestos used in coating materials on building walls, and the wet method, which supplies water or a stripping agent to the grinding area of ​​a grinder to prevent the removed asbestos from scattering. However, the water jet method requires a large amount of high-pressure water because it uses high-pressure water (or mist) of tens to hundreds of MPa. This is in comparison with the water pressure of 20 to 40 MPa used by water jet cutters, which use high-pressure water to cut materials, and shows that asbestos removal using the water jet method uses a large amount of high-pressure water.

[0005] The invention described in Patent Document 1 is a water jet method for removing asbestos, and uses a high-pressure water supply device that can supply water at a pressure of at least 245 MPa per minute to one stripping device (

[0031] ). In addition, the water used for removing asbestos is drained using a drainage device, and if the amount of mixed water sent to the filtration tank by one stripping device is 9 liters per minute, and the actual operating time of the stripping device for spraying high-pressure water is 2.5 hours (150 minutes) per day, the amount of mixed water sent to the filtration tank by one stripping device is 1,350 liters (

[0041] ). This water needs to be neutralized by installing a neutralizing device with a water mixing function to comply with environmental standards before being drained into the natural environment, so it was unavoidable to increase the size of the asbestos removal equipment and the cost of removal. Furthermore, in the water jet method, the nozzle that sprays high-pressure water is easily clogged, making it difficult to reuse the water containing the crushed asbestos removal material used for stripping the asbestos.

[0006] The invention described in Patent Document 2 discloses asbestos removal using a wet grinder method that uses a scraper. Although the amount of water used is less than that used with the water jet method, 0.05 to 1.00 liters of water are still supplied per minute (

[0029] ). Assuming that the actual operating time is 2.5 hours (150 minutes), the amount of mixed water sent from one stripping device to the filtration tank is a maximum of 150 liters. This used water is treated in a neutralization tank to comply with environmental standards before being discharged into the natural environment

[0048] , so it was inevitable that the asbestos removal equipment would become larger and the removal costs would become higher. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2017-144384 A [Patent Document 2] Patent Publication No. 2022-6896 Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, an object of the present invention is to provide an asbestos removal device that is small and capable of reducing removal processing costs, and an asbestos removal method using the device. [Means for solving the problem]

[0009] In order to solve the above problems, the inventor discovered that in asbestos removal using a wet method, the water used to prevent asbestos from scattering can be reused without being discharged into the natural environment, thereby making it possible to omit equipment such as neutralization equipment and drainage equipment that were required in the previous wet method, and thus completed the present invention. That is, the present invention has been made to solve the above-mentioned problems, and embodiments of the present invention may include at least a part of the following configurations.

[0010] [1] An asbestos removal device for removing asbestos layers attached to structures, the asbestos removal unit comprises: a removal unit which removes the asbestos layer; a circulation unit which supplies water to the removal unit to prevent asbestos from scattering, receives a mixture of the water and the asbestos removed by the removal unit, filters the mixture, and supplies the filtered water to the removal unit; and a suction unit which maintains a negative pressure between the removal unit and the circulation unit; The removal unit includes a disk that grinds and removes the asbestos layer, a cover that covers the asbestos layer to form a closed space, a nozzle unit that sprays the water into the closed space, and a discharge hole that discharges the mixture of the water and the asbestos removal material from the closed space, The circulation section is characterized by having a water supply mechanism that connects a water supply hose to the nozzle section to supply water, an inlet that connects an exhaust hose to receive the mixture from the removal section, a filter that filters the mixture, and an exhaust port that connects an exhaust hose to exhaust the mixture to the suction section. [2] The water supply system is characterized by having a water supply hose connected to the water supply mechanism, an exhaust hose connected to the inlet, and an exhaust hose connected to the exhaust port. [3] The water supply mechanism of the circulation section is characterized in that it includes a pump that supplies the water in the circulation section to the removal section. [4] The water is characterized by containing a stripping agent. [5] An asbestos removal method including the following steps: (1) a step of supplying the water for preventing asbestos from scattering from the circulation unit through the water supply hose to the enclosed space from the nozzle unit of the removal unit; (2) forming the enclosed space by covering the asbestos layer attached to the structure with the cover of the removal unit; (3) removing the asbestos layer by grinding with the disk of the removal unit; (4) discharging the mixture of the water and the removed material from the removal section into the circulation section; (5) A step of supplying the water separated from the mixture by the filter in the circulation section to the nozzle section of the removal section. Effect of the Invention

[0011] According to the invention of claim 1, when removing an asbestos layer attached to a structure, the water supplied to the removal section to prevent asbestos from scattering is filtered in a circulation section that receives a mixture of the asbestos removal material and water, and the obtained water is then supplied again to the removal section. This allows the used water to be reused any number of times without being discharged into the natural environment, so there is no need to install a storage tank or neutralization device, or to monitor the quality of the water discharged into the natural environment. This makes it possible to reduce the size of the asbestos removal equipment and reduce the processing costs of removal.

[0012] According to the invention of claim 2, the removed asbestos can be transported to the circulation section.

[0013] According to the invention of claim 3, the water in the circulation section can be supplied to the removal section.

[0014] According to the invention of claim 4, the asbestos layer attached to the structure can be easily removed.

[0015] According to the invention of claim 5, an asbestos removal method using the asbestos removal device according to the inventions of claims 1 to 3 can be used. [Brief description of the drawings]

[0016] [Figure 1] 1 is a schematic diagram of an asbestos removal device and an asbestos removal method. [Diagram 2] This is an example of an embodiment of the present invention. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0018] An example of an embodiment of the asbestos removal apparatus and asbestos removal method of the present invention will be described with reference to Figs. 1 to 6. Fig. 1 is a schematic diagram showing an example of an embodiment of the asbestos removal apparatus and asbestos removal method of the present invention. Fig. 2 is an example of an embodiment of the present invention. Fig. 3 is a front view of the removal section of the present invention. Fig. 4 is a rear view of the removal section of the present invention. Fig. 5 is an explanatory diagram of the circulation section of the present invention. Fig. 6 is an explanatory diagram of the suction section of the present invention.

[0019] We will now explain the outline of the asbestos removal device 1. As shown in Figures 1 to 6, the asbestos removal device 1 is composed of a removal section 2 that removes the asbestos layer C or the base adjustment layer A, a circulation section 3 that supplies liquid such as water or a treatment agent (hereinafter referred to as "water W") to the removal section 2 to prevent asbestos from scattering and receives a mixture M of the removed material R from the removal section 2 and the water W, and a suction section 4 that maintains the inside of the circulation section 3 at negative pressure.

[0020] <Configuration of removal unit 2> As shown in FIG. 1 to FIG. 4, the removal unit 2 of the asbestos removal device 1 scrapes off the asbestos layer C containing asbestos of the structure S having the base adjustment layer A and the asbestos layer C formed on the surface of the base adjustment layer A by a coating material containing asbestos using the sandpaper part 221 of the disk 220. By selecting sandpaper with different roughness, finishing according to the work content can be performed. As shown in FIG. 2, the cover 230 of the removal unit 2 is provided with an inner peripheral wall part 231 of the cover 230 that forms a closed space Ws by covering the asbestos layer C, a nozzle part 240 that sprays water W into the closed space Ws to prevent asbestos from scattering, and a discharge hole 250 that discharges the mixture M of the removed material R and water W of the removal unit 2 to the circulation part 3. The function of the inner peripheral wall part 231 may be performed by the cover 230. In this case, the inner peripheral wall part 231 may not be provided.

[0021] As shown in FIG. 2 to FIG. 4, the removal unit 2 includes a disk 220, a cover 230, and an inner peripheral wall portion 231. Hereinafter, the top and bottom refer to the side facing the structure S during use as the bottom, and the opposite side as the top, and the left and right refer to the left and right directions during use as the left and right directions. The disk 220 has a convex shape at the top, and a sandpaper portion 221 is formed in a disk shape on the outer periphery lower surface of the disk 220. The width of the sandpaper portion 221 is preferably 1 cm to 5 cm, and more preferably 2 cm to 4 cm. A plurality of holes 222 are formed along the circumference of the disk 220 closer to the center than the sandpaper portion 221 of the disk 220, and the nozzle portion 240 can pass through the holes 222 from above the holes 222 to spray water into the closed space Ws. The inner peripheral wall portion 231 protrudes downward from the cover 230 so as to cover the disk 220 from above the disk 220. The inner peripheral wall portion 231 may be integrally molded with the cover 230. The inner peripheral wall portion 231 may not be provided, and the cover 230 may also function as the inner peripheral wall portion 231. A flexible packing 232 that protrudes further downward is laid on the lower end of the inner peripheral wall portion 231, and when the removal unit 2 is in use, the packing 232 comes into close contact with the structure S to form the closed space Ws. The packing 232 may be brush-shaped.

[0022] 2 to 4, the main body 233 of the removal part 2 is substantially cylindrical and has a rod-shaped handle 234 on one side. The handle 234 may be provided on either the left or right side of the main body 233. When using the removal part 2, the removal part 2 can be stably and closely attached to the structure S by holding the main body 233 with one hand and holding the handle 234 with the other hand.

[0023] Nozzle portion 240 of removal unit 2 communicates with a water amount adjustment cock 241 (FIG. 3) that adjusts the amount of water, and a water supply hose 242 is connected to water amount adjustment cock 241. Water amount adjustment cock 241 is attached so as to be rotatable, and the amount of water can be freely adjusted.

[0024] The nozzle portion 240 is disposed on the trajectory of the holes 222 when the disk 220 rotates. When the holes 222 pass under the nozzle portion 240 as the disk 220 rotates, the water W jetted from the nozzle portion 240 passes through the holes 222, and when a portion of the disk 220 without the holes 222 passes under the nozzle portion 240, the water W jetted from the nozzle portion 240 hits the disk 220. Through this process, the water W jetted from the nozzle portion 240 collides with the rotating disk 220 and the structure S and becomes fine water droplets, and the inside of the closed space Ws formed by the packing 232 laid on the inner peripheral wall portion 231 of the removal portion 2 and the structure S coming into close contact with each other can be made evenly wet.

[0025] 2 to 4, the removal unit 2 includes a discharge hole 250. The discharge hole 250 discharges a muddy mixture M obtained by mixing the asbestos layer C containing the asbestos scraped off by the disk 220, the base adjustment layer A, and the like with water W supplied from the nozzle unit 240. The discharge hole 250 is provided so as to communicate from the lower surface to the upper surface of the cover 230. The discharge hole 250 is provided at a position from which the mixture M is discharged when in use.

[0026] The asbestos removal device 1 further includes a water supply hose 242 for supplying water to the nozzle portion 240 of the removal unit 2, and a discharge hose 251 for discharging the mixture M of the removed material R and water W of the removal unit 2 from the closed space Ws. One end of the water supply hose 242 is connected to the nozzle portion 240, and the water W is supplied to the nozzle portion 240 through the water supply hose 242. One end of the discharge hose 251 is connected to the discharge hole 250, and a granular mixture M in which the asbestos layer C containing asbestos, the base adjustment layer A, and the like and the water W supplied from the nozzle portion 240 are mixed is discharged from the closed space Ws between the removal unit 2 and the structure S through the discharge hose 251. The diameter of the discharge hose 251 is preferably 20 mm to 100 mm, and more preferably 30 mm to 40 mm.

[0027] <Configuration of Circulation Section 3> As shown in Fig. 1 and Fig. 5, the circulation section 3 has a sealed structure and includes an inlet 320 for receiving the mixture M discharged from the removal section 2, a filter 321 for separating the mixture M received from the removal section 2 into a removed matter R and water W in the removal section 2, a water supply mechanism 322 for supplying the water W separated by the filter 321 again to the removal section 2 via a water supply hose 242, and an exhaust port 330 connected to the suction section 4 via an exhaust hose 331. The shape of the circulation section 3 is preferably cylindrical because the circulation section 3 is maintained under negative pressure, but is not limited thereto. The capacity of the circulation section 3 is preferably 10 liters to 100 liters, more preferably 20 liters to 60 liters. The capacity of the portion of the circulation section 3 for storing the removed matter R and the water separated therefrom is preferably 10 liters to 30 liters, more preferably 15 liters to 25 liters. The water filtered by the filter 321 of the circulation unit 3 is not discharged from the circulation unit 3 to the natural environment, but is sent to the removal unit 2 for reuse, so that the circulation unit 3 of the asbestos removal device 1 can be made compact and can be brought into a narrow site. The inlet 320 and the exhaust port 330 of the circulation unit 3 are preferably disposed in the upper part of the circulation unit 3, and the water supply mechanism 322 is preferably disposed in the lower part of the circulation unit 3, but are not limited thereto. The pore size of the filter 321 is preferably 1 μm to 3 mm, and more preferably 100 μm to 1 mm. Since the water W obtained by filtration through the filter 321 is not discharged to the natural environment, there is no need to filter the removed material R to below the detection limit, and no water quality test is required.

[0028] 1, the water supply mechanism 322 of the circulation unit 3 includes a pump 323 and a water supply port 324. The pump 323 is preferably a submersible pump (e.g., LNSTUDIO 25W-1500L / H). The water filtered by the filter 321 of the circulation unit 3 is sent by the pump 323 through the water supply hose 242 to the nozzle unit 240 of the removal unit 2 and is reused as water W that prevents asbestos from scattering.

[0029] As shown in FIG. 1, the water W filtered by the circulation unit 3 is reused and is not discharged into the natural environment. Therefore, there is no need for a neutralization facility that temporarily stores the water W and neutralizes it before discharging it into the natural environment, which was necessary in the conventional asbestos removal device, and there is no need for testing to confirm the quality of the water W. Conventionally, the water W was stored in a water tank with a capacity of several thousand liters, and was treated in a neutralization facility to comply with environmental standards before being discharged, so daily water quality testing was required, but this is not necessary with the asbestos removal device 1. Therefore, the entire system can be made compact, which is advantageous in terms of work efficiency and processing costs. In addition, since the water tank has a large capacity, it needs to be transported to the site by truck or the like, and it is difficult to install it in a narrow work site, which has been a problem in removing asbestos in a narrow work site. However, since the asbestos removal device 1 does not require a water tank, it is possible to remove asbestos even in a narrow work site.

[0030] The water W filtered by the circulation unit 3 is reused repeatedly without being discharged into the natural environment, but there are cases where water W that has not been reused remains in the circulation unit 3 when the asbestos removal work is completed. Even in this case, since the remaining amount of water W is small (20 liters to 30 liters), it can be coagulated by a coagulant together with the removed matter R filtered by the filter 321 and treated as industrial waste. As a result, the asbestos removal device 1 does not discharge any water W into the natural environment from the start to the completion of the asbestos removal work.

[0031] <Configuration of suction unit 4> 1 and 6, the suction unit 4 is airtightly connected to the exhaust port 330 of the circulation unit 3 and the exhaust hose 331, and can maintain a negative pressure in the circulation unit 3, the exhaust hose 251, the exhaust hole 250, and the closed space Ws. The suction unit 4 may be equipped with a HEPA filter (High Efficiency Particulate Air filter) (not shown) used to capture fine particles, fine dust, and the like.

[0032] A method for removing asbestos using the asbestos removal device 1 will now be described in detail.

[0033] <Step of supplying water W to prevent asbestos from scattering from the circulation section 3 to the removal section 2> In the asbestos removal device 1, the removal unit 2 scrapes off the base adjustment layer A formed on the surface of the structure S and the asbestos layer C formed on the surface of the base adjustment layer A by a coating material containing asbestos with the sandpaper part 221 of the disk 220. At this time, in order to prevent asbestos from scattering, water W is supplied to a nozzle part 240 that sprays water W into a closed space Ws formed by an inner peripheral wall part 231 and a packing 232 of a cover 230 of the removal unit 2 covering the asbestos layer C of the structure S.

[0034] The nozzle portion 240 communicates with a water amount adjustment cock 241 (FIG. 2) that adjusts the amount of water, and a water supply hose 242 is connected to the water amount adjustment cock 241. The water amount adjustment cock 241 is attached so as to be rotatable, and the amount of water W supplied from the nozzle portion 240 can be freely adjusted.

[0035] The water W supplied to the nozzle portion 240 of the removal portion 2 can be water W stored in the circulation portion 3, without relying on an external water supply source. The pump 323 installed in the circulation portion 3 can supply the water W stored in the circulation portion 3 to the nozzle portion 240 via the water supply hose 242. If the amount of water W stored in the circulation portion 3 is small at the start of the asbestos removal work, or if water W has not yet been stored, water may be supplied from an external water supply source to the circulation portion 3, the nozzle portion 240 of the removal portion 2, or the water supply hose 242.

[0036] <Step of supplying water W from nozzle portion 240 of removal unit 2 to closed space Ws> The nozzle unit 240 is disposed on the rotation trajectory of the hole 222 when the disk 220 rotates. When the hole 222 passes under the nozzle unit 240 as the disk 220 rotates, the water W jetted from the nozzle unit 240 passes through the hole 222, and when a part of the disk 220 without the hole 222 passes under the nozzle unit 240, the water W jetted from the nozzle unit 240 hits the disk 220. By this process, the water W jetted from the nozzle unit 240 collides with the rotating disk 220 or the structure S and becomes fine water droplets, so that the closed space Ws of the removal unit 2 can be made evenly wet, the ground asbestos layer C or the base adjustment layer A is moistened, and the ground asbestos layer C containing asbestos is prevented from scattering outside the asbestos removal device 1.

[0037] As shown in Figs. 2 to 4, a flexible packing 232 is laid on the lower end of the inner peripheral wall 231 of the removal unit 2, and the asbestos layer C of the structure S is covered with the cover 230 of the removal unit 2 to form a closed space Ws. Water W supplied from the circulation unit 3 to the nozzle unit 240 of the removal unit 2 is sprayed into the closed space Ws formed by the packing 232 coming into close contact with the asbestos layer C of the structure S. The amount of water W supplied can be, for example, about 0.1 to 2 liters per minute. The water sprayed from the nozzle unit 240 collides with the rotating disk 220 and the asbestos layer C of the structure S and turns into fine water droplets, making it possible to make the closed space Ws evenly wet.

[0038] The water W that has turned into fine droplets within the closed space Ws of the removal section 2 becomes a muddy mixture M by mixing with the ground asbestos layer C and the base adjustment layer A, etc., so there is no risk of the asbestos contained in the asbestos layer C scattering outside the asbestos removal device 1. A scattering prevention agent such as a polymer may be added to the water W in the circulation section 3 to prevent the ground asbestos layer C from scattering.

[0039] <Step of removing the asbestos layer C or the base adjustment layer A in the removal unit 2> Air compressed by a compressor (not shown) is supplied to the removal unit 2 via an air supply hose (not shown). The removal unit 2 is provided with an air motor (not shown) in the main body 233, and is driven by the compressed air supplied from the compressor, causing the disk 220 to rotate by a gear mechanism (not shown) connected to the air motor.

[0040] The disk 220 may have a convex shape at the top, but is not limited thereto. A sandpaper portion 221 is formed in a circumferential shape on the outer periphery of the disk 220, which contacts the asbestos layer C of the structure S. The width of the sandpaper portion 221 is preferably 1 cm to 5 cm, more preferably 1.5 cm to 2 cm. The diameter of the disk 220 is preferably 8 cm to 15 cm, more preferably 10 cm to 13 cm. If the diameter of the disk 220 is large, the asbestos layer C and the base adjustment layer A containing asbestos over a wide area can be scraped off, which is efficient. In addition, if the abrasive particles of the sandpaper portion 221 are selected to be large, the asbestos layer C can be ground deeper, and if the asbestos layer C has penetrated into the base adjustment layer A, it can be scraped off together with the base adjustment layer A. If the abrasive particles are selected to be small, only the asbestos layer C can be selected and ground off.

[0041] <Step of discharging the mixture M of the removed matter R and water W from the removal section 2 to the circulation section 3 in which a negative pressure is maintained by the suction section 4> As shown in Figures 5 and 6, the suction unit 4 is airtightly connected to the circulation unit 3 by the exhaust port 330 and the exhaust hose 331, and maintains a negative pressure within the circulation unit 3, the exhaust hose 251, the exhaust hole 250 and the closed space Ws.

[0042] When the suction unit 4 (Fig. 6) is driven, the inside of the circulation unit 3 becomes negative pressure via the exhaust hose 331, and as a result, the closed space Ws (Fig. 2) formed by the cover 230 of the removal unit 2 covering the asbestos layer C becomes negative pressure via the discharge hose 251. Then, the mixture M of the removed material R containing asbestos and water W is discharged from the closed space Ws through the discharge hole 250 of the removal unit 2 to the circulation unit 3 via the discharge hose 251 (Fig. 1).

[0043] <Step of separating the mixture M discharged from the removal section 2 into the removed matter R and water W by the filter 321 of the circulation section 3> As shown in Fig. 5, the circulation unit 3 includes a main body 301 and a lid 302 that is provided on the top of the main body 301 in an openable and closable manner. Furthermore, as shown in Fig. 1, a filter 321 that separates the sucked mixture M into water W and a removed material R is provided inside the main body 301. The mixture M discharged to the circulation unit 3 is separated by the filter 321 into the removed material R, such as the ground asbestos layer C and the base adjustment layer A, and the water W.

[0044] The filter 321 may, for example, have a capability of filtering particles of 500 μm or less. Since the asbestos removal device 1 does not discharge the water W into the natural environment, it is not necessary to filter the water W until the removed substances R contained in the water W become equal to or less than the detection limit.

[0045] In the asbestos removal method of this embodiment, since the mixture M is in a wet state, there is no risk of the asbestos contained in the mixture M scattering into the outside air. Not only during the work of grinding the surface of the asbestos layer C, etc. by the removal unit 2, but also in the path for recovering the asbestos layer C, etc. removed by the grinding, to the circulation unit 3, there is no risk of the asbestos contained in the asbestos layer C scattering outside the asbestos removal device 1.

[0046] <Step of Supplying Water W Separated by Filter 321 to Removal Unit 2> 1, the mixture M discharged to the circulation section 3 is filtered by the filter 321, and crushed materials such as the granular asbestos layer C and the base adjustment layer A remain on the filter 321, and the filtered water W accumulates in the lower part of the circulation section 3. The pore size of the filter 321 is preferably 1 μm to 3 mm, and more preferably 100 μm to 1 mm.

[0047] As shown in Figure 1, the water W filtered by the filter 321 is pumped by the pump 323 via the water supply hose 242 and sprayed again into the closed space Ws from the nozzle portion 240 of the removal section 2, and is used in the asbestos removal work as water W to prevent asbestos from scattering, and is not discharged from the asbestos removal device 1 into the natural environment. EXAMPLES

[0048] The present invention will be described in detail below by way of examples, but the present invention is not limited to these examples in any way.

[0049] The following shows an example of asbestos removal work using the asbestos removal device 1. The asbestos removal area is 100 square meters, and the total work time is approximately 50 hours. The compressor is manufactured by Hokuetsu Industries Co., Ltd. and supplies 1,300 liters of air per minute to the removal section 2. An air motor is provided in the removal section 2 and is driven by compressed air supplied from the compressor, causing the disk 220 to rotate at 10,600 revolutions per minute.

[0050] The nozzle diameter of the nozzle part 240 of the removal part 2 is 5 mm, the water supply hose 242 has a diameter of 8 mm and a length of 2 m. The discharge hose 251 for discharging the mixture M of the removed material R and water W of the removal part 2 from the closed space Ws has a diameter of 40 mm and a length of 2 m.

[0051] The capacity of the circulation section 3 is 50 L, and the capacity of the portion that stores the water separated from the removed matter R is 20 L. The pore size of the filter 321 is 400 μm.

[0052] The suction unit 4 is manufactured by Karcher, and has a suction air volume of 74 liters per second and a vacuum degree of 25.4 / kPa. The exhaust hose 331 has a diameter of 50 mm and a length of 5 m.

[0053] The water supply mechanism 322 of the circulation section 3 includes a pump 323, which is a submersible pump manufactured by LNSTUDIO and has a water supply capacity of 0.41 liters per second.

[0054] At the end of the work, the total amount of removed material R is 0.3 cubic meters, and the amount of remaining solidified water W is 0.03 cubic meters. [Industrial Applicability]

[0055] The present invention provides an asbestos removal device and an asbestos removal method that can be brought into sites with narrow drainage spaces and reduce processing costs by reusing the water used to prevent asbestos scattering without draining it, and is of great industrial value. [Explanation of symbols]

[0056] 1. Asbestos removal equipment 2...Removal part 220···Disc 221 Sandpaper section 222...hole 230···Cover 231...Internal peripheral wall part 232...Packing 233...Main unit 234 Handle 240 Nozzle section 241 Water volume adjustment cock 242...Water supply hose 250...Drain hole 251... Discharge hose 3...Circulation section 301...Main unit 302...lid 320...Intake entrance 321···Filter 322...Water supply mechanism 323 Pump 324...Water inlet 330···Exhaust port 331···Exhaust hose 4...Suction part C. Asbestos layer W...Water A... Base adjustment layer R...Removed item S...Structure Ws ··· Closed space M ··· Mixture

Claims

1. An asbestos removal device for removing an asbestos layer attached to a structure, A removal unit for removing the asbestos layer; a circulation section that supplies water to the removal section to prevent asbestos from scattering, receives a mixture of the water and the asbestos removed by the removal section, filters the mixture, and supplies the filtered water to the removal section again; a suction unit that maintains the removal unit and the circulation unit at a negative pressure; The removal unit includes: The apparatus includes a disk for grinding and removing the asbestos layer, a cover for covering the asbestos layer to form an enclosed space, a nozzle for spraying the water into the enclosed space, and a discharge hole for discharging the mixture of the water and the asbestos removal material from the enclosed space, The circulation section includes: a water supply mechanism for connecting a water supply hose for supplying water to the nozzle portion; an inlet for connecting a discharge hose for receiving the mixture from the removal portion; a filter for filtering the mixture; and an exhaust port for connecting an exhaust hose for exhausting the mixture to the suction portion; An asbestos removal device comprising:

2. A water supply hose connected to the water supply mechanism; A discharge hose connected to the receiving port; an exhaust hose connected to the exhaust port; 2. The asbestos removal device according to claim 1, further comprising:

3. 2. The asbestos removal apparatus according to claim 1, wherein the water supply mechanism of the circulation section includes a pump that supplies the water in the circulation section to the removal section.

4. 2. The asbestos removal apparatus according to claim 1, wherein the water contains a stripping agent.

5. An asbestos removal method that includes the following steps: (1) a step of supplying the water for preventing scattering of asbestos from the circulation unit through the water supply hose to the enclosed space from the nozzle unit of the removal unit; (2) a step of forming the enclosed space by covering the asbestos layer attached to the structure with the cover of the removal unit; (3) removing the asbestos layer by grinding with the disk of the removal unit; (4) discharging the mixture of the water and the removed material from the removal section into the circulation section; (5) A step of supplying the water separated from the mixture by the filter in the circulation section to the nozzle section of the removal section.

Images