JP2010144325A - System for removing asbestos - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system capable of avoiding all risks that asbestos exposed by asbestos removal work may be breathed in and an unfavorable influence exerted on an surrounding area in the case of the removal of the asbestos adhering to a structure such as a building. <P>SOLUTION: A means for removing the asbestos without the demolition of the building with the asbestos includes a nozzle body capable of facing an asbestos surface; the nozzle body comprises a grip cylinder and a jet cylinder; the grip cylinder and the jet cylinder are connected to each other via a hinge, so that the jet cylinder can make a free-direction angle with the grip cylinder; an electromagnetic valve and the like are provided in the grip cylinder or in proper positions of a hose; an opening/closing switching lever for blocking or opening gas and dry ice which are circulated through the hose is provided; an upper end of the lever is pivotally attached to the grip cylinder; the inside of its intermediate portion is connected to the opening/closing switching lever via a restoring member such as a spring; and the grip cylinder, the jet cylinder and the lever are formed in a shape approximately similar to that of a pistol by opening a tail end. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a system in which small dry ice particles are jetted onto an asbestos surface of a building where asbestos is used, and the dry ice particles can be removed by explosion.

  Humans have long used asbestos as interior and exterior buildings and partitions. Asbestos is a natural fibrous silicate mineral that is not a specific mineral but has a different chemical composition and structure, and is composed of several types of minerals that form fibers. In addition, it has many features such as lightness, ease of processing, low cost, and has been used in various applications because of its properties, heat insulation, strength, fire resistance, electrical insulation, acid resistance, alkali resistance, and anti-condensation. .

  However, the asbestos material called mineral fiber was very harmful to the human body. In other words, asbestos is fine and easily becomes dust. If it is taken into the respiratory tract, it may cause asbestosis, and its fine and fibrous shape makes it difficult to remove once pierced into cells. This cause of malignant mesothelioma and lung cancer over the years, and this adverse effect on the human body is now a major social problem.

  In other words, the conditions for living that have been fulfilled for a long time have been paid in various ways in exchange for the enjoyment of material civilization. They have been solved in a certain place, in a certain phenomenon, as a result of which the responsibility is clarified.

However, at this time, this causal unclear damage has been sounding alarms on the human body, the environment, and even at the global level.

  Asbestos is not a specific mineral but has a different chemical composition and structure, and is composed of several types of minerals that form a fiber. It has high expansion capacity and flexibility, as well as heat insulation, chemical resistance, and sound insulation. It has many features such as electrical insulation and anti-condensation properties, and is inexpensive, so it is a natural material that has been widely used as a variety of materials such as mining and manufacturing, ships, vehicles and construction.

  For this reason, the technology related to the asbestos removal method attached to structures such as buildings must avoid the danger of inhaling the asbestos exposed by the removal work and the adverse effects on the surroundings, and its removal system is strongly required. -ing

  However, conventional building dismantling and spraying asbestos removal work encloses a considerable area including the wall and ceiling, sprays anti-scattering agents, moistens asbestos, and the worker uses a scraping device such as keren to peel it off. I was carrying it out.

  This removal method did not give consideration to the health of the workers, and asbestos residue remained due to manual work and could not be completely removed.

  This is because the surface of the “concrete / steel frame” to which asbestos is attached has innumerable irregularities, and naturally fine asbestos fibers exist firmly in the inside. Therefore, it is the actual situation that it cannot be completely removed by the processing of scraper or keren.

  Asbestos fibers are formed with ultrafine particles of 1 μ to 5 μm, which cannot be confirmed with the naked eye, and can be recognized as being very scary. Moreover, it is a well-known fact that the fine needle-like fibers of this asbestos are taken into the human respiratory organs as described above and are very harmful and are regarded as problems.

  Therefore, asbestos removal agent that removes asbestos without adversely affecting the surroundings because there is a danger to the human body if people inhale the asbestos scattered by the demolition of old asbestos and removal work of sprayed asbestos The advent of a removal agent manufacturing method and an enforcement method for removing asbestos is highly desired.

  In short, asbestos removal is a method of removing all sprayed asbestos and replacing it with other non-asbestos building materials. This method is effective as a method for preventing dust from sprayed asbestos, and has a high degree of damage and deterioration (such as those with a lot of falling off or drooping of fibers), and the adhesive strength with the base material is reduced. It is necessary to completely remove objects (such as those in which the spray layer is floating) and those used where there is vibration or water leakage, but the removal work has been considered difficult .

  In addition, asbestos-attached buildings are completely removed from this building, containment and containment. The former is to form a coating film by spraying a solidifying agent on the surface of the sprayed asbestos (to make the surface solidified by means of a coating film containment treatment means). This is a method to prevent dust from blowing asbestos by strengthening the binding strength of asbestos fibers. Enclosure is a method to prevent asbestos dust from being covered indoors by covering the ceiling, walls, etc., to which asbestos is sprayed with non-asbestos building materials. However, asbestos that has a great adverse effect on the human body remains in any case and should never be enforced in the future. It must be removed.

  When the prior art for removing this asbestos is seen in patent literature, a method for removing an asbestos layer using an aqueous solution of a polymer compound has been proposed (see Patent Literature 1).

  The asbestos layer is coated or sprayed with a water-based wetting liquid to wet the asbestos layer, then the wet asbestos layer is moistened, and then the surface of the wet asbestos layer is an aqueous solution of a polymer compound or An asbestos removal method characterized in that an aqueous dispersion is applied or sprayed to form a continuous adhesive wet film and the asbestos layer is removed before the adhesive wet film is dried.

  In this case, it is also described that the viscosity of the aqueous solution or dispersion of the polymer compound is preferably from 0.1 to 500 poise. The layer) has not been removed.

  In addition, a box-shaped hood that covers the outside of the area where the asbestos layer is to be removed by encroaching the edge of the sprayed asbestos layer constructed on the sprayed part of the ceiling, wall, etc. of the building, A peeling means having an injection nozzle or the like for peeling asbestos in the hood, a suction means for sucking and removing the peeled asbestos in the hood from the inside of the hood, and an edge portion of the hood There are injection means for injecting a boundary stabilizer into the surrounding asbestos layer to isolate the inside and outside of the hood. (See Patent Document 2)

  And the work which peels asbestos as mentioned above is performed inside the hood, and since the hood is fixed to the asbestos layer by the boundary stabilizer, the dust generated by the work is removed from between the hood and the asbestos layer. There is no scattering outside.

  Therefore, it is possible to keep the scope of influence of the work locally, and there is no need for temporary equipment or curing equipment to prevent the asbestos from being scattered, so that the boundary stabilizer is injected into the asbestos layer by the injection means and the asbestos layer is removed. A hood covering the portion to be fixed is fixed to the asbestos layer to isolate the inside and outside of the hood, and inside the hood, the asbestos is peeled using a peeling means, and this is removed from the inside of the hood by a suction means.

  The work for isolating the inside and the outside of the hood can be easily performed by the injection means, and the work for removing the asbestos and the work for removing the separated asbestos dust can be saved by the peeling means and the suction means. The worker can perform the removal work of sprayed asbestos.

  In addition, the invention of a spraying asbestos layer removal device that can prevent the asbestos from being scattered when performing asbestos removal work to prevent the work environment from deteriorating and can simplify the work has been made. Yes.

  This is a box shape covering the outside of the area to be removed by biting the edge of the sprayed asbestos layer constructed on the sprayed part of the ceiling, wall, etc. of the building as described above. And a device for monitoring using a television camera for monitoring the peeling work in the hood.

  And the work of peeling asbestos is performed inside the hood, and the progress status of the work can be grasped from the outside of the hood by the monitoring device, so there is no need to remove the hood and check the progress status of the peeling work. When removing the hood, asbestos dust does not scatter to the outside, and the operation of removing the hood sequentially can be omitted, so that the operation can be simplified. (See Patent Document 3)

  However, the suction means as the work to isolate the inside and outside of the hood cannot capture the scattered asbestos dust if its suction force is weak, and if it is strong, the inside and outside of the hood cannot be isolated. There is even a risk of an unexpected catastrophe. Moreover, in the actual asbestos peeling work, there is a limit to the remote monitoring by the camera up to this minute portion, and there is a disadvantage that the manual system is inevitably left, and the entire system becomes an expensive facility.

JP-A-4-49377 Specification JP-A-8-28026 JP-A-8-28027 Specification

  The purpose of the present invention is to remove asbestos adhering to a structure such as a building, and to remove all the dangers of inhaling the asbestos exposed by the removal operation and the adverse effects on the surroundings. Is to provide.

  Another object of the present invention is to provide an environmental protection system for removing asbestos that does not rely on a safe person.

  Thus, the present inventor has found that it is best to spray dry ice particles on the asbestos surface in order to remove the asbestos layer.

  That is, a feature of the present invention is a means for removing asbestos with a spray gas body such as dry ice without dismantling a building having asbestos, and has a nozzle body that can face the asbestos surface. The nozzle body is composed of a gripping hand cylinder and an injection cylinder, which are connected by hinges so that the injection cylinder can be at an angle in a free direction with respect to the gripping hand cylinder.

  Also, an electromagnetic valve or the like is provided inside the gripping cylinder or at an appropriate position of the hose, and has an open / close switching lever that shuts off or opens the gas and dry ice flowing through the hose, and the upper end of the lever is the gripping cylinder. The inside of the middle part is connected to the above open / close switching lever via a restoring member such as a spring and the end is opened, and the gripping hand cylinder, the injection cylinder and the lever have substantially the same shape as a so-called pistol. It is that.

  Further, the upper end portion of the gripping cylinder is adapted to fit the lower end portion of the injection cylinder, and when the injection cylinder is bent to the maximum in the horizontal direction with respect to the axis of the gripping cylinder, The bottom is in contact with the inner edge around the upper end of the gripping cylinder so that its rotation is prevented, and when the injection cylinder is folded up to the maximum in the vertical direction with respect to the axis of the gripping cylinder, this injection cylinder The upper part around the end is in contact with the outer side around the upper end of the gripping hand cylinder so that its rotation is prevented.

  As another feature of the present invention, the tip of the injection cylinder has an open opening, and a nozzle connected to the hose protrudes from the opening. There is a lamp provided at an appropriate position of a certain hose and capable of irradiating outward from the opening of the injection cylinder.

  Another feature of the present invention is that the hose is made of, for example, a fiber reinforced low temperature silicon hose that retains sufficient flexibility to withstand the low temperatures of dry ice.

Furthermore, what can be said in common with the above characteristics is that the diameter of the dry ice grains is 0.1 mm to 0.5 mm.
It is also a feature of the present invention that the supply amounts of gas and dry ice at this time are 1: 1 to 1: 6, respectively.

In this case, the gas may be liquid nitrogen, carbon dioxide, or argon in addition to gasoline. Besides the characteristics of the present invention, the gas may be liquid nitrogen, carbon dioxide, or argon. It is to be.

  Specifically, the effect of the present invention is to remove the asbestos attached to the building with dry ice grains, and after the removal of such asbestos, the dry ice sublimes and finishes, so conventional sand, water and iron can be used. Unlike being removed, it was possible to reduce the amount of waste and to eliminate the cost of the removal work.

  In addition, the nozzle that injects dry ice grains can be adjusted in angle with respect to the axis of the grip hand part and the gas distribution pipe with the gas injection port. Since the angle of the dry ice can be adjusted while in the position, it is possible to accurately focus on the surface on which the asbestos is adhered, and the peeling work can be reliably performed.

  This is because the grip body and the entire nozzle body consisting of the injection cylinder and the lever have substantially the same shape as a so-called pistol, so that the dry ice spraying operation can be performed with one hand. In addition to supporting it on the walls of the building to stabilize itself, other work can also be done.

  The upper end of the gripping cylinder is fitted with the lower end of the injection cylinder, and the upper part around the end of the injection cylinder is in contact with the outside of the upper periphery of the gripping cylinder. Even so, the swivel movement of the injection cylinder is restricted with respect to the gripping hand cylinder, and the dry ice can be appropriately injected at a desired position.

  In addition, since there is an open opening at the tip of the injection cylinder and there is a lamp that can irradiate outward, the dry ice can be properly injected into the dark and dark places at the desired position. It is safe because it is chosen from materials that can withstand the low temperatures of ice and that has sufficient flexibility.

  Furthermore, the diameter of the dry ice particles is set to 0.1 mm to 0.5 mm, and the supply amount of gas and dry ice at this time is 1: 1 to 1: 6, respectively. Because it was liquid nitrogen, carbon dioxide, and argon, the best asbestos removal work could be carried out.

  In addition, the mode for carrying out the present invention is broadly divided into means for spraying dry ice particles directly on an asbestos surface attached to a building, etc., and removing the asbestos by its jet power and explosive force, There is a means for spraying dry ice particles after the asbestos surface is sufficiently moistened with “water” or glycomannan or other wetting agent.

  Thus, in the former case, there is a risk that dust from the asbestos that has been scraped off may be generated in the work of removing the asbestos that is applied. It is important to isolate the entire room with a dustproof sheet, etc., and use a so-called well-known work mouth boat, etc. In this respect, the latter is the above-mentioned wetting agent, which sufficiently wets the asbestos layer of the building, It was possible to prevent the generation of dust by wetting up to.

  As a result, the binding between asbestos and its attached wall surface is loosened, and the stripping operation by dry ice spraying can be easily performed. In any case, the system for the implementation is not so different. And the hose which conveys dry ice has sufficient flexibility, although it can endure the low temperature of dry ice.

  In general, the effect of the present invention is that when removing asbestos, the risk of inhaling the asbestos exposed by the removal work and the adverse effects on the surroundings can be avoided, and the asbestos removal work is performed in a safe environment. It was a maintenance system.

The modes for carrying out the present invention can be broadly divided into the following two means as described above. That is,
1. A means of spraying dry ice particles directly onto the asbestos surface attached to a building, etc., and removing the asbestos by its jet power and explosive force.
2. This is a means for spraying dry ice grains after the asbestos surface is sufficiently wetted beforehand using “water” or glycomannan or other wetting agent.

  Therefore, in the former case, there is a risk that dust from the asbestos that has been scraped off may be generated in the work of removing the asbestos that is applied, and this is extremely dangerous for the worker. The entire room is isolated with a dust-proof sheet or the like, and a so-called known work port boat or the like is used. In this regard, the latter was able to prevent the generation of dust by sufficiently wetting the asbestos layer of the building with the above-mentioned wetting agent and wetting to the depth of the wall surface.

  As a result, the binding between asbestos and its attached wall surface is loosened, and the stripping operation by dry ice spraying can be easily performed. In any case, the system for the implementation is not so different.

  In order to better understand the present invention, an embodiment of means for removing asbestos by spraying dry ice particles directly on an asbestos surface attached to a building or the like and then using the jet power and explosive force will be described.

  That is, (1) in FIG. 1 is an actual enforcement system. For example, if the nozzle (4) is focused on the asbestos (3) on the surface (2) of the building, dry ice particles ( 5) diverge.

  At the same time, a constant pressure accompanying gas stored in the tank (7) of the compressor (6) is generated by this pressure source.

  The accompanying gas is gaseous gasoline, liquid nitrogen, carbon dioxide, argon, or the like. At this time, the dry ice and the amount of the accompanying gas are about 1: 1 to 6: 1. It is preferable that the relative mass ratio is as intended.

  This system (1) uses a compressor (6) and air rather than using a conventional low-temperature tank, and adjusts the flow of the gasoline or the like by a flow first regulator (8).

  Next, (9) is a small-sized gas generator, which was subjected to the above-mentioned target pressure by which regulated gasoline or the like was supplied to the mixer (12) via the hose (10) and the second regulator (11). A small piece of gasoline or other dry ice is combined to cause the dry ice to collide and explode on the asbestos (3) surface.

  Meanwhile, the dry ice pieces determined by the second regulator (11) are regulated by the gas generator (9) and supplied to the mixer (12), and the mixed mixed material is supplied to the nozzle (4). It has become so. As shown in FIG. 2, the nozzle (4) has an about 1.2 cm stab-shaped large-diameter portion (13) into which the above-mentioned mixed solution enters, and a 0.3-mm small-diameter portion (14) connected thereto. Consists of.

  The nozzle (4) naturally cleans the asbestos (3) surface by hand or little by little with a suitable robot.

  Thus, the nozzle (4) focused at a predetermined interval is arranged on the asbestos (3) surface of the building (2) in FIG. Therefore, the gas in the gas tank (7) is supplied via the compressor (6), the first regulator (8), and the mixer (12).

  In this case, as the gas, liquid nitrogen, carbon dioxide, or argon is used in addition to so-called gasoline. This gas is sent from the tank (7) kept at a low temperature by the force of the compressor (6), and its flow rate is set by the first regulator (8) and enters the mixer (12).

  On the other hand, small pieces of dry ice are supplied from the small gas generator (9) to the mixer (12) through the hose (10) in an amount adjusted by the second regulator (11). In this case, the supply amounts of gas and dry ice are preferably 1: 1 to 1: 6, respectively.

  Thus, the dry ice pieces and the gas are mixed by the mixer (12) and reach the nozzle (4). In this case, the blending amount of dry ice and gas is 1: 1, but it has been found that similar effects can be obtained even in the range of 6: 1 as described above.

  The mixed gas enters the small diameter portion (13) from the large diameter portion (12) of the nozzle (4), so that the mixed gas is about 0.1 mm and does not have a larger diameter. The mass is preferably 0. .045g.

  In the conventional asbestos (3) removal means, it is almost impossible to remove the fine asbestos (3) residue adhering to the construction surface after the asbestos (3) layer is peeled off. It is no exaggeration to say that.

  However, in the embodiment of the present invention, it was removed by spraying dry ice by the above-mentioned means, and the removal of asbestos (3) which was substantially complete could be achieved. The sprayed dry ice particles are not sublimated from the solid state to the gas state, and are therefore easy to post-process.

  In other words, this post-treatment is to clean the part where there was an asbestos (3) layer. A clean process using CO2 dry ice blasting is good, and the “target surface” is cleaned to remove fine asbestos (3). It is a construction method that allows innovative work to be completely removed. In this case, the diameter of the dry ice grains is preferably 0.1 mm to 0.5 mm.

  That is, the construction surface after the asbestos (3) is gelled and peeled off is the ceiling (15) as shown in FIG. 4 which is an enlarged view of the circular portion of FIG. 3 and FIG. Since the asbestos (3) remains as a residue (18) in the flying bubble small hole (17) on the concrete surface (16), this could be removed.

  Further, such asbestos removal work is usually performed in a state of being isolated so that the asbestos that has been cut off is not scattered. One example is shown in FIG. 6, but (19) is a duct cylinder that can be expanded and contracted, such as a bellows-like strip, and the upper end is a duct cylinder that is opened in correspondence with the enforcement surface for removing asbestos (3).

  Thus, a dry ice hose (20) in which the dry eye nozzle (4) is arranged near the upper end is provided on the axis of the duct cylinder (19). The end of the hose (20) is connected to an exhaust pump (21) that can handle dust in the dry ice supply system.

  Accordingly, a dry ice hose (20) is sprayed from the nozzle (4) onto the working surface of the ceiling from a compressor (not shown) of the dry ice supply device. In this case, the dry ice has a temperature of −78 ° C., and the particle diameter is preferably 1 mm to 0.5 mm.

  Further, when the entire work place is a so-called clean room depending on the work environment and is performed by a work robot or the like, a dust collection system may be separately provided as shown in FIG. That is, in the figure, (22) is a dust collector having a hose (23) whose upper end is opened near the above-mentioned dry ice injection part, (24) is a fan, (25) is a motor, and (26) is a dust collector. Part (27) is an exhaust port.

  When the motor (25) is driven, the fan (24) rotates, and the asbestos (3) is sucked together with residual dry ice and the like by the hose (23) by the fan (25). As a result, the sucked gas leaving the residue of asbestos (3) passes through the exhaust port (27) of the dust collecting part (26) and is exhausted.

  Further, FIG. 9 shows another embodiment of FIG. 8 in which the entire workplace is made into a clean room. (28) is an isolated space made of a sheet of pet resin (29) when performing the asbestos removal enforcement method. . In this case, the pet resin sheet (28) needs to be able to withstand wind pressure environment conditions of -100 pa to -1000 pa or more. In other words, the target area is set to a negative pressure condition of (−20 mmaq> H / 10 to 12 times in terms of ventilation frequency).

  The reason for using such a pet resin is that it is particularly advantageous in all respects, such as being cheap and durable, and yet being flexible and easy to process for other resins such as polyethylene film. Because it is.

  Next, the nozzle body (30) including the nozzle (4) used in the practice of the present invention will be described with reference to FIG.

  Thus, the nozzle body (30) comprises a gripping hand cylinder (31) and an injection cylinder (32), each connected by a hinge (33), and the injection cylinder (32) is connected to the gripping hand cylinder (31). The angle can be a free direction.

  Further, a gas flow pipe (34) whose end is connected to the mixer (12) along the axis of the nozzle body (30), the tip is connected to the nozzle (4), and can be bent following the free angle adjustment. There is.

  (35) is a lever pivoted on the nozzle body (30) at the top, although not shown or described in detail, the gas flow in the gas flow pipe (34) is opened and closed by the lever (35). A valve is provided.

  Thus, the nozzle body (30) is carried, and the asbestos (3) layer is directed toward the asbestos (3) layer to remove the asbestos. In this case, the operator uses one hand like a pistol operation. Even if the work that requires provisional work is high or unstable

  Next, the nozzle body (30) including the nozzle (4) used in the practice of the present invention will be described with reference to FIG.

  Thus, the nozzle body (30) comprises a gripping hand cylinder (31) and an injection cylinder (32), each connected by a hinge (33), and the injection cylinder (32) is connected to the gripping hand cylinder (31). The angle can be a free direction.

  Further, a gas flow pipe (34) whose end is connected to the mixer (12) along the axis of the nozzle body (30), the tip is connected to the nozzle (4), and can be bent following the free angle adjustment. There is.

  Reference numeral (35) denotes a lever whose upper part is pivotally attached to the nozzle body (30), and a lever (35) for opening and closing the gas flow in the gas flow pipe (34) described below is provided.

  Thus, the nozzle body (30) is tied up, and the asbestos (3) layer is directed toward the asbestos (3) layer to remove the asbestos. In this case, the operator uses one hand like a pistol operation. It is also possible to support the worker's body even in places where the work requiring provisional work is high or unstable.

  Although not shown or described in detail, an electromagnetic valve is provided in the hose (23) inside the gripping hand cylinder (31) such as an electromagnetic valve, and gas and dry ice flowing through the hose (23) are shut off. Alternatively, there is the opening / closing switching lever (35) that opens.

  The upper end of the lever (35) grips the lever (35) and is pivotally attached to the hand tube (31). The lever (35) is connected to the inside of the lever (35) via the opening / closing switching lever (35) via a restoring member such as a spring. If the end is opened, the gripping cylinder (31), the injection cylinder (32), and the lever (35) have the same configuration as a so-called pistol, and the lever (35) can be operated with one hand.

  In this case, the upper end portion of the gripping cylinder (31) is adapted to be fitted to the lower end portion of the injection cylinder (32), and as shown in FIG. 10, with respect to the axis of the gripping cylinder (31). When the injection cylinder (32) is bent to the maximum in the horizontal direction, the lower part (36) around the end of the injection cylinder (32) comes into contact with the inner end (37) around the upper end of the gripping cylinder (31) and rotates. In contrast, as shown in FIG. 11, when the injection cylinder (32) is folded up to the maximum in the vertical direction with respect to the axis of the gripping cylinder (31), the injection cylinder (32) The upper part (38) around the end is in contact with the outer part (39) around the upper end of the gripping hand cylinder (31) so that its rotation is prevented, and the bending angle of the injection cylinder (32) is restricted. It has become so.

  In this way, the nozzle body (30) is carried and the nozzle (4) is directed toward the asbestos (3) layer to remove asbestos. In this case, the operator operates the pistol as described above. Thus, it is possible to support the operator with another hand even in a high place or an unstable place.

  As seen in FIG. 9, the tip of the injection cylinder (32) has an open opening (40), and the nozzle (4) connected to the hose (23) protrudes from the opening (40). It is like that. (41) is provided inside the tip of the injection cylinder (32) or at an appropriate position of the hose (23) at the same position, and is directed outward from the opening (40) of the injection cylinder (32), that is, work Inside is a lamp with sufficient illuminance to irradiate the asbestos surface.

  The hose (20) and the gas distribution pipe (34) are preferably low-temperature silicon hoses reinforced with, for example, fibers that retain sufficient flexibility to withstand the low temperatures of dry ice.

Asbestos removal system layout illustration Illustration of the nozzle body Illustration of asbestos layer pasted on the ceiling 4 is an enlarged explanatory diagram of the circle range of FIG. Front view of asbestos residue Illustration of asbestos removal work Illustration of other asbestos removal work Illustration of asbestos removal work in isolated space Cross-sectional explanatory drawing of the nozzle body Illustration of the nozzle body bent in the horizontal direction Illustration of the nozzle body bent vertically

Explanation of symbols

1, system 2, surface 3, asbestos 4, nozzle 5, dry ice particles 6, compressor 7, tank 8, flow first regulator 9, small gas generator 10, hose 11, second regulator 12, Mixer 13, stab-shaped large-diameter portion 14, small-diameter portion 15, ceiling 16, concrete surface 17, flying bubble small hole 18, residue 19, duct cylinder 20, dry ice hose 21, exhaust pump 22, dust collector 23, hose 24, fan 25, motor 26, dust collecting part 27, exhaust port 28, resin sheet 29, isolation space 30, nozzle body 31, gripping hand cylinder 32, injection cylinder 33, hinge 34, gas distribution pipe 35, lever 36, Lower 37, inner end 38, upper 39, outer 40, opening 41, lamp

Claims (7)

  A means for removing asbestos by spraying dry ice or the like without dismantling a building having asbestos, and having a nozzle body that can be opposed to the asbestos surface. Each of which is connected by a hinge so that the injection cylinder can be freely angled with respect to the gripping hand cylinder, and an electromagnetic valve or the like is provided inside the gripping hand pipe or at an appropriate position of the hose. It has an open / close switching lever that shuts off or opens the gas and dry ice flowing inside, and the upper end of the lever is pivotally attached to the gripping hand cylinder, and the inside of the intermediate portion is the restoring member such as the open / close switching lever and a spring. The grip hand tube, the injection tube, and the lever are connected to each other through the open end and have substantially the same shape as a so-called pistol. The upper end portion of the grip hand tube When the injection cylinder is bent to the maximum in the horizontal direction with respect to the axis of the gripping hand cylinder, the lower part around the end of the injection cylinder is around the upper end of the gripping hand cylinder. When the injection cylinder is folded up to the maximum in the vertical direction with respect to the axis of the gripping hand cylinder, the upper part around the end of the injection cylinder is above the gripping hand cylinder. A dry ice jet system for removing asbestos, wherein the rotation is prevented by contacting the outer periphery of the upper periphery of the asbestos.   The tip of the injection cylinder shown in claim 1 has an open opening, and a nozzle connected to the hose protrudes from the opening. A dry ice jet system used for removing asbestos, characterized in that there is a lamp provided at an appropriate position and capable of irradiating outward from the opening of the jet cylinder.   The hoses according to claims 1 and 2 are dry ice used for asbestos removal, characterized in that they are made of a low temperature silicon hose reinforced with fiber, for example, which retains sufficient flexibility to withstand the low temperatures of dry ice. Injection system.   Konjac powder such as konjac powder, granules, surimi, small chunks, paste or extract on the asbestos layer attached to the asbestos construction surface with the above nozzle body or other similar nozzle body or spray gun or brush. The konjac mixed liquid or water which is a mixture with a processed product or the like is infiltrated, and then dry ice particles are jetted onto the asbestos layer of the building using a carrier gas. Dry ice injection system used for asbestos removal shown in.   The dry ice jet system used for removing asbestos according to any one of claims 1 to 4, wherein the dry ice grains have a diameter of 0.1 mm to 0.5 mm.   6. A dry ice jet system used for removing asbestos, characterized in that the supply amounts of gas and dry ice in claims 1 to 5 are 1: 1 to 1: 6, respectively.   7. The asbestos removal system used for removing asbestos, characterized in that the gas in claim 1, 2 and 4, 6 is liquid nitrogen, carbon dioxide and argon in addition to gasoline.

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