JP4024292B1 - How to reuse asbestos protective clothing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for reusing asbestos protective clothing by reusing asbestos protective clothing to suppress generation of processing costs.
SOLUTION: A wetting process in which a wetting solution L is sprayed or applied to protective clothing W to which asbestos dust adheres, used to remove asbestos, and the asbestos dust is moistened. The protective clothing W that has undergone the process is stored, the collection bag 10 is sealed, the collection bag 10 is further stored in a water-insoluble protective bag 11, and the protective bag 11 is sealed and double packed. And a washing step of taking out the sealed collection bag 10 from the protective bag 11 and putting it in the washing tub 13a and washing it with water. In this washing step, the collection bag 10 is melted by water, and the protective clothing W Since it is washed with water, the protective clothing W can be reused, and the processing cost of specially managed industrial waste is eliminated, thereby reducing the processing cost.
[Selection] Figure 1

Description

  The present invention relates to a method for reusing protective clothing used when removing asbestos.

  When dismantling the building and removing the interior and exterior materials of the building, the construction area is covered with a shield such as a vinyl sheet to prevent dust such as asbestos from scattering outside the construction area. There is known a construction section device which is cured and maintains the inside of the construction section at a negative pressure to prevent dust from being scattered outside the construction section (for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-279861

  In the work in the construction section device of Patent Document 1, protective clothing must be used to protect the worker from dust such as asbestos. However, since dust such as asbestos adheres to this protective clothing, the protective clothing itself must be treated as specially managed industrial waste, and the processing cost for disposal is different from that of general waste. In order to process as waste, it has the problem that the processing cost is 10 times or more of general waste.

  It is an object of the present invention to provide a method for reusing asbestos protective clothing that can reduce the cost of processing by reusing asbestos protective clothing.

Means for Solving the Problems and Effects of the Invention

  The method for reusing asbestos protective clothing of the present invention is to wet or remove asbestos dust by spraying or applying a wetting solution to the protective clothing to which asbestos dust adheres used when removing asbestos on the asbestos construction surface in the building. A wet process, and a protective bag that has undergone the wet process is stored in a water-soluble recovery bag, the recovery bag is sealed, and the recovery bag is further stored in a water-insoluble protective bag. A recovery step of sealing and double-packing the protective bag; and a cleaning step of taking out the recovery bag sealed from the protective bag and putting it in a washing tub and washing it with water. It melts and the protective garment is washed with water.

With this configuration, wet asbestos dust does not scatter when the protective clothing is undressed, so that secondary damage to the worker can be prevented and a highly safe working environment can be obtained. Moreover, since the protective clothing is double-packed, the wet asbestos dust does not leak, the storage property is good, and the safety during transportation can be ensured.
Further, since the protective clothing can be washed in the state of being stored in the collection bag, it is easy to handle, and the asbestos dust does not re-scatter and is highly safe. In this way, it is possible to safely and easily remove the asbestos dust adhering during the asbestos removal work and to recycle the protective clothing, reducing the processing cost by eliminating the processing cost of specially controlled industrial waste. To do.

  Since the water in the washing tub is heated from 30 degrees to 40 degrees, the collection bag can be dissolved safely and quickly, and the protective clothing can be washed with the warm water. If the temperature of the hot water is less than 30 degrees, the time for the recovery bag to melt becomes long, and if it exceeds 40 degrees, it may be too hot and work may be difficult.

  By connecting a waste liquid purification device to the washing tub and purifying the waste liquid in the washing tub with this waste liquid purification device, only asbestos can be separated and recovered, so that secondary asbestos contamination can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. FIG. 1 is a schematic diagram of steps of a method for reusing asbestos protective clothing according to the present invention. In FIG. 1, the method of reusing protective clothing W includes a wetting process for spraying or applying a wetting solution L to protective clothing W, a collecting process for collecting protective clothing W that has undergone the wetting process, and this collecting process. And a cleaning process for cleaning the protective clothing W that has undergone the above.

  First, as shown in FIG. 2, the wetting process of the protective clothing W is performed after removing the spray material 2 containing asbestos on the asbestos construction surface 1a constructed on the building 1 as an example. Prior to the removal of the spray material 2 and the like, the work area for removal is covered with a plastic curing sheet 3 such as polyethylene, polyethylene terephthalate (PET resin), vinyl chloride, and the like is cured. A negative pressure construction section 5 is provided in which the internal area is maintained and managed so as to be in a negative pressure state with respect to the outside by a ventilation dust collector 4 incorporating a HEPA filter (High Efficiency Particulate Air Filter). In the case of the floor surface, the curing sheet 3 having a thickness of 0.15 mm or more is used for a double layer (double), and in the case of a wall surface, a sheet having a thickness of 0.08 mm or more is used as a single layer. Is done. The collection of fine particles in the HEPA filter applies the principles of “filtering (sieving effect)”, “inertia (collision)”, “interference (electrostatic adsorption)”, and “diffusion (Brownian motion)”. Capable of collecting 99.97% or more of 0.3 micron particles that are considered difficult to catch.

  Further, the negative pressure construction section 5 is provided with a security zone 6 for workers to enter and leave the section. This security zone 6 is provided in order to prevent asbestos dust from leaking from the negative pressure construction section 5 to the outside. The security zone 6 includes a changing room 6a, a cleaning room 6b, a front room 6c, and the like in order of the direction from the outside toward the negative pressure construction section 5. These chambers are partitioned by a curtain-like partition sheet 8 that has teeth on both sides and a zipper-type fastener 7 that opens and closes by moving a metal fitting therebetween.

  An operator who enters the negative pressure construction section 5 through the security zone 6 wears the protective clothing W, and sprays the spray material 2 containing asbestos with a hand tool such as a spatula or a stick rod, or water with high pressure water. An operation of peeling and removing is performed by various peeling means (not shown) such as a jet or dry ice blast that sprays dry ice particles. As a result, asbestos dust scattered and floating in the negative pressure construction section 5 adheres to the protective clothing W worn by the worker. In this state, the wetting process of the protective clothing W is performed in the negative pressure construction section 5 or in the security zone 6.

  The wetting device 9 (see FIG. 2) used in this wetting process is provided in the negative pressure construction section 5 or in the security zone 6. The wetting device 9 includes a tank 9a, a pump 9b, and the like, and the wetting solution L accommodated in the tank 9b is sprayed or applied to the protective clothing W from the ejection device 9d such as a nozzle or a shower head via the pump 9b. ing.

  Further, as the wetting solution L, a gelling agent that makes the asbestos adhering to a semi-solid solution state is suitable, for example, an aqueous solution of a water-soluble polymer compound (xanthan gum, guar gum, carboxymethyl cellulose, etc.).

  In addition, as the protective clothing W, clean wear corresponding to the cleanliness (class) 5 of Japanese Industrial Standard JIS-B-9920 is used. This clean wear is made of polyester fiber, does not generate dust from the human body (about 0.3 microns), and regulates the entry of particles of about 0.1 microns from the outside, and is prevented from being charged and static electricity. Protect the human body from exposure environments where asbestos dust is scattered.

  And the collection | recovery process which collect | recovers the protective clothing W which passed through this wetting process is performed in the security zone 6, as shown in FIG. In this security zone 6, there is a collection bag 10 which is a film-like bag body of a water-soluble plastic film PVA (biomass plastic film) made of, for example, polyvinyl alcohol, which has water-solubility in hot water of 30 ° C. or more. Is done. The protective clothing W processed by the wetting process is stored in the collection bag 10 (see FIG. 1). Thereafter, the collection bag 10 is sealed to isolate the protective clothing W from the outside. Further, the collection bag 10 is double-packed by a protective bag 11 made of water-insoluble plastic such as polyethylene, polyethylene terephthalate (PET resin), or vinyl chloride.

  Next, a cleaning process for cleaning the protective clothing W that has undergone the recovery process will be described. As shown in FIG. 1, the recovery bag 10 isolated by the recovery process of FIG. 2 and double-packed by the protective bag 11 is provided at a location away from the negative pressure construction section 5 and the security zone 6. It is conveyed to the negative pressure clean room 12 (see FIG. 3). The protective clothing W is cleaned by the cleaning device 13 installed in the negative pressure clean room 12. That is, the protective bag 12 is opened, the recovery bag 11 is taken out from the protective bag 12, and the recovery bag 11 is put in the washing tub 13a of the cleaning device 13 in a sealed state (the protective clothing W is isolated). Cleaning is performed by In the negative pressure clean room 12, a ventilation dust collector 4a with a built-in HEPA filter is connected, and the ventilation dust collector 4a maintains and manages the interior so as to be in a negative pressure state with respect to the outside.

  As the water in the washing tub 13a used at the time of washing, preferably warm water adjusted to 30 degrees to 40 degrees is used. The collection bag 10 is quickly melted by the warm water, and the protective clothing W is washed with the warm water. After the cleaning is completed, the protective clothing W is taken out from the cleaning tank 13a, dried and repaired, and then vacuum packed and stored in a reusable state.

  Thus, since the temperature of warm water is set to 30 to 40 degrees, cleaning can be performed quickly. Further, when the temperature of the hot water is less than 30 degrees, the time for the collection bag 10 to melt becomes long, and when it exceeds 40 degrees, it may be too hot and difficult to work.

  Note that the double-packed collection bag 10 is transported by a transport box 14 (see FIG. 3) such as a cooler box in order to prevent secondary scattering due to asbestos dust. The cleaning device 13 in the negative pressure clean room 12 is connected to a waste liquid purifying device 15 equipped with a filter (not shown) for purifying waste liquid containing asbestos after cleaning the protective clothing W, and this waste liquid purifying device. Only 15 asbestos is separated and collected by 15 filters.

The schematic diagram of the process of the reuse method of the protective clothing which concerns on this invention. The schematic diagram which shows a negative pressure construction division and a security zone. The schematic diagram which shows a negative pressure clean room.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 1a Asbestos construction surface 10 Collection bag 11 Protective bag 13a Washing tank 15 Waste liquid purification apparatus W Protective suit L Wetting solution

Claims (3)

A wetting process in which a wetting solution is sprayed or applied to protective clothing to which asbestos dust adheres, used to remove asbestos on the asbestos construction surface in the building, and the asbestos dust is moistened;
Protective clothing that has undergone the wetting process is stored in a water-soluble recovery bag, the recovery bag is sealed, and the recovery bag is further stored in a water-insoluble protective bag, and the protective bag is sealed. A recovery process of double packing;
And a washing step of taking out the sealed collection bag from the protective bag, putting it in a washing tub and washing it with water,
A method for reusing asbestos protective clothing, wherein the recovery bag is melted with water in this washing step, and the protective clothing is washed with water.   The method for reusing asbestos protective clothing according to claim 1, wherein the water in the washing tub is warm water of 30 to 40 degrees.   The method for reusing asbestos protective clothing according to claim 1 or 2, wherein a waste liquid purification device is connected to the washing tub, and the waste liquid in the washing tub is purified by the waste liquid purification device.

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