JP7364761B2 - How to dismantle and remove PCB treatment facilities - Google Patents

Description

The present invention relates to a method for dismantling and removing a PCB processing facility, and more particularly, to a method for dismantling and removing a PCB processing facility, which dismantles and removes contaminated objects installed at the back of the facility in order from the one closest to the exit.

When dismantling and removing PCB treatment facilities, it is necessary to use temporary tents or existing buildings to dismantle and remove the facilities in an airtight environment to avoid contaminating the surrounding environment.

In the technology of Patent Document 1, areas are divided into areas that are unnecessary for maintaining the PCB decontamination function and have the possibility of PCB contamination, areas necessary for the PCB decontamination function, and areas necessary for disassembly and removal work, and On the other hand, a demolition/removal method is disclosed in which areas are allocated on a room-by-room basis, a correspondence relationship between areas and rooms is established, and the divided areas are dismantled in descending order of degree of contamination.

Patent No. 6031406

However, in the construction method of Patent Document 1, areas are associated with rooms, and since polluted and non-contaminated substances from plant equipment and building equipment are mixed in the room, non-contaminated substances and non-contaminated substances are mixed in the room. Even if there is contaminated material, it will have to be divided into smaller parts within the building or transported in a confined space.

Furthermore, in Patent Document 1, when dismantling a room by room, non-contaminated objects in the room must also be dismantled at the same time, which imposes restrictions on narrow transport routes and procedures, which is not efficient.

Furthermore, in Patent Document 1, it is stated that pollutants are treated in high-concentration treatment facilities that are subject to dismantling, but currently there are many detoxification treatment facilities across the country, so if it is a low-concentration pollutant, , it is more economical to treat at a detoxification treatment facility.

In addition, non-contaminated materials can be disposed of as general industrial waste or recycled products, but since they are treated room by room, they must be treated in a detoxification facility, which has a high processing unit cost, which is uneconomical.

Furthermore, if the current high-concentration treatment facility is to be dismantled while retaining its decontamination function, there will be restrictions on the dismantling procedures and transport routes, making it impossible to dismantle and remove efficiently.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for dismantling and removing a PCB processing facility, which can secure a transport route by sequentially dismantling PCBs starting from the transport exit even if the site is narrow.
Furthermore, other objects of the present invention will become clear from the following description.

The above problems are solved by the following inventions.

(Claim 1)
When dismantling and removing all objects to be dismantled, including equipment, equipment, piping, wiring, or buildings existing in the PCB treatment facility (1),
In a non-contaminated area (2) near the export exit in the building (10) of the PCB processing facility (1), a temporary storage space (6) is provided in which the object to be dismantled is dismantled and temporarily stored. form,
Carrying out the objects to be dismantled that have been classified as contaminated objects among the objects to be dismantled to the temporary storage space (6) and making them wait for a predetermined period of time;
A method for dismantling and removing a PCB processing facility, characterized by the following.
(Claim 2 )
Among the objects to be dismantled, the objects to be dismantled that are classified as non-contaminated objects are removed after moving the non-contaminated objects that obstruct the removal of the contaminated objects to a position away from the passage leading to the exit. carrying out the objects to be dismantled classified as contaminated objects to the temporary storage space (6);
2. The method for dismantling and removing a PCB treatment facility according to claim 1 .
(Claim 3 )
Of the objects to be dismantled that are classified as non-contaminated objects, the non-contaminated objects that do not obstruct the path to the exit for the contaminated objects are left behind, and the objects to be dismantled are placed in the temporary storage space (6). Among them, the objects to be dismantled classified as the above-mentioned contaminated items are carried out,
3. The method for dismantling and removing a PCB treatment facility according to claim 1 or 2 .
(Claim 4 )
A wrapping room (62) provided with a temporary door that does not open the entrance and exit at the same time is provided in a part of the temporary storage space (6);
2. The method for dismantling and removing a PCB treatment facility according to claim 1 .
(Claim 5 )
The wrapping room (62) is provided with a wrapping machine, and the wrapping machine wraps the object to be dismantled that has been classified as a contaminated object.
5. The method for dismantling and removing a PCB processing facility according to claim 4 .
(Claim 6 )
Instead of installing a shed tent (8) that covers the entire PCB treatment facility (1), the existing ventilation and exhaust equipment (9) is used to create a negative pressure in the highly contaminated area (3). Creating a room pressure difference with other areas and dismantling and removing the objects classified as contaminated objects;
The method for dismantling and removing a PCB processing facility according to any one of claims 1 to 5 .
(Claim 7 )
Without installing a shed tent (8) that covers the entire PCB processing facility (1), the existing ventilation/exhaust equipment (9) is used to create a negative pressure in the wrapping room (62). forming a room pressure difference with other areas and wrapping the object to be dismantled classified as contaminated;
7. The method for dismantling and removing a PCB processing facility according to claim 4, 5 or 6 .

According to the present invention, it is possible to provide a method for dismantling and removing a PCB processing facility, which can secure a transport route by sequentially dismantling the PCB processing facility starting from the discharge port even if the site is narrow.

A schematic plan view showing an example of the method for dismantling and removing a PCB processing facility of the present invention A schematic plan view showing an example of the method for dismantling and removing a PCB processing facility of the present invention A schematic plan view showing another example of the method for dismantling and removing a PCB processing facility of the present invention A schematic plan view showing an example of the method for dismantling and removing a PCB processing facility of the present invention A schematic plan view showing an example of the method for dismantling and removing a PCB processing facility of the present invention A schematic plan view showing an example of the method for dismantling and removing a PCB processing facility of the present invention A schematic plan view showing an example of the method for dismantling and removing a PCB processing facility of the present invention A diagram showing another preferred embodiment of the method for dismantling and removing a PCB processing facility of the present invention A diagram showing another preferred embodiment of the method for dismantling and removing a PCB processing facility of the present invention Schematic plan view showing a conventional example A diagram showing still another preferred embodiment of the method for dismantling and removing a PCB processing facility of the present invention

EMBODIMENT OF THE INVENTION Hereinafter, embodiments of the present invention will be described based on the drawings.
First, in a situation where the embodiment of the present invention is implemented, high concentration PCBs have already been removed by cleaning etc., and all objects to be dismantled are either contaminated items classified as low concentration or not. It is assumed that the substance is in a non-contaminated state. Contaminants classified as low concentration (low concentration contaminants) will be described later.

Therefore, among the objects to be dismantled, including equipment, devices, piping, wiring, and buildings that exist in PCB processing facilities, there is a mixture of objects to be demolished that are classified as non-contaminated objects and objects that are classified as contaminated objects. When dismantling and removing these objects, it is more efficient to dismantle and remove the objects installed at the back, starting from the one closest to the exit, while ensuring a space for the removal. You can proceed with your work.

In the present invention, as objects to be dismantled near the exit are removed, a large space is created near the exit, so the area near the exit in the building can be used as a temporary storage space that is advantageous during transport. Can be done. Furthermore, since a large temporary storage space is formed, this space can be effectively used as a wrapping or sheet curing area necessary for transporting contaminated materials.

In this embodiment, before the demolition and removal work, the degree of contamination of the objects to be dismantled, including equipment, equipment, piping, wiring, or buildings existing in the PCB processing facility, is analyzed in advance, and By separating contaminated materials into non-contaminated materials, a faster and more stable method of disassembly and removal can be realized. Here, the premise of the method for classifying objects to be dismantled into polluted and non-contaminated objects is that each object to be dismantled is classified into low-concentration pollutants and ``Low-concentration PCB eligibility criteria'' stipulated by the Ministry of the Environment. Basically, the analysis should be conducted using a well-established analytical method.

The method for dismantling and removing a PCB processing facility of the present invention proposes how to dismantle and remove objects classified as contaminated objects.

The dismantling and removal method of a PCB treatment facility of the present invention involves dismantling and removing contaminated items installed at the back of the facility in order from the one closest to the exit, while ensuring a space for removal, regardless of the area divided into PCB management areas. It is characterized by going.

Here, "regardless of areas classified as PCB control areas" means that the entire facility is divided into non-control areas and controlled areas, and controlled areas are areas that are divided into PCB control areas. The area is divided into Level 1 area, Level 2 area, and Level 3 area in descending order of the PCB concentration handled, and the order of Level 1 area, Level 2 area, and Level 3 area is divided according to the degree of contamination of PCB concentration. This means that it is not restricted by.
In other words, in the present invention, instead of being restricted to the order of level 1 area, level 2 area, and level 3 area, which are divided according to the degree of contamination, the area can be moved to the rear side in order from the one closest to the exit while ensuring the space for carrying out the area. The contaminated objects that have been installed will be dismantled and removed.

1 to 7 are schematic plan views showing an example of the method for dismantling and removing a PCB processing facility according to the present invention.

In FIG. 1, 1 is a PCB processing facility. The PCB treatment facility 1 is divided into a non-contaminated area 2 and a contaminated area 3 inside the non-contaminated area 2.

Contaminated area 3 in this embodiment shows a case where the contamination level increases in the order of L1<L2<L3.

As shown in the figure, level 1 area L1 is arranged at the outermost side, level 2 area L2 is arranged at the innermost side, and level 3 area L3 is arranged at the innermost side. In the figure, reference numeral 4 indicates an exit port for dismantling and transporting contaminated materials. In this embodiment, the outlet 4 is located on the right side of the building 10 of the PCB processing facility 1 in the drawing.

The first step in dismantling and removing contaminated items installed at the back of the site starting from the one closest to the exit while securing a space for unloading without being restricted by the order of level areas will be explained based on Figure 2. do.

The first step is to form a temporary storage space 6 by dismantling and removing objects to be dismantled that exist in a partial area 6a of the non-contaminated area 2 near the export exit 4 in the building 10 of the PCB treatment facility 1. It is. Since this part of the non-contaminated area 2 is originally a non-contaminated area, there is no need for decontamination, and by removing the objects to be dismantled from this area, A large space is created. This wide space functions as a temporary storage space 6. By forming this temporary storage space 6, a work space is created in the building 10 in the vicinity of the carry-out port 4, with good efficiency in carrying out the goods.

Since this temporary storage space 6 is formed within the building 10, the objects to be dismantled classified as contaminated objects are not exposed to rainwater, etc., and there is no concern about environmental pollution. It can also function as a temporary storage space for adjusting the transport of objects to be dismantled. Furthermore, it can also function as a waiting space for the period required for PCB contamination level analysis. By carrying out these operations near the exit 4, work efficiency can be significantly increased.

In addition, as shown in FIG. 3, in addition to a part of the non-contaminated area 2 6a, the temporary storage space 6 includes an area near the export exit 4 of the level 1 area L1 of the contaminated area, which has been decontaminated by decontamination processing. It is also preferable to include an area 6b which has been reduced to a contamination level. Thereby, a larger work space can be secured near the exit 4.

Next, the second stage of disassembly and removal will be explained based on FIG. 4.
As shown in FIG. 4, a dismantling section 61 extends from the upper side of the level 1 area L1 of the contaminated area 3, the lower side of the level 1 area L1, and the right side of the level 2 area L2 to the right end of the level 3 area L3. be dismantled and removed.

The object to be dismantled existing in the dismantling section 61 to be dismantled and removed is dismantled and transported to the temporary storage space 6. At this time, if the object to be dismantled that is classified as non-contaminated object becomes a hindrance to the transportation of the object to be dismantled that is classified as contaminated object, the object to be dismantled that is classified as non-contaminated object should be moved through the passageway toward the exit for the object to be dismantled that is classified as contaminated object. It is preferable to move it to avoid it and leave it in place if it does not get in the way.

Next, the third stage of disassembly and removal will be explained based on FIG. 5.
As shown in FIG. 5, the demolished portion 61 corresponds to the upper side of area L1 of contaminated area 3, the lower side of level 1 area L1, the upper side of area L2, the lower side of area L2, and the parts of level 3 area L3. It will be dismantled and removed.

Since most of the objects to be dismantled existing in the dismantling section 61 are classified as contaminated objects, these objects to be dismantled are dismantled and transported to the temporary storage space 6.

Next, the fourth stage of disassembly and removal will be explained based on FIG. 6.
As shown in FIG. 6, the dismantling section 61 corresponding to the upper side of the level 1 area L1, the lower side of the level 1 area L1, and the left side of the level 2 area L2 of the contaminated area 3 is dismantled and removed.

Next, the fifth stage of disassembly and removal will be explained based on FIG. 7.
As shown in FIG. 7, the dismantling section 61 corresponding to the left side of the level 1 area L1 of the contaminated area 3 is dismantled and removed.

In this level 1 area L1, objects to be dismantled that are classified as contaminated objects and objects to be dismantled that are classified as non-contaminated objects may coexist. Therefore, if objects to be dismantled that are classified as non-contaminated objects will interfere with the transportation of objects to be dismantled that are classified as contaminated objects, avoid the path toward the exit 4 for transporting contaminated objects. If it does not get in the way, you can leave it there.

In this way, the present invention first secures the temporary storage space 6 in the building 10, and then dismantles and removes the temporary storage space 6 in order from the side closest to the exit 4 as shown in FIGS. 4 to 7. As a result, it is possible to proceed with the work more efficiently by dismantling and removing the objects to be dismantled installed at the back of the object in order from the one closest to the exit while ensuring a space for the removal.

In the above explanation, an example of disassembly and removal in each stage shown in FIGS. 4 to 7 has been explained, but the present invention is not limited to this. In this embodiment, it is sufficient that the objects to be dismantled in the building can be dismantled and removed from the side closer to the carry-out port 4. For example, the dismantling sections 61 in FIGS. 4 and 5 may be dismantled and removed at the same time, or the objects in FIGS. 6 and 4 to 7 may be performed simultaneously.

Furthermore, in this embodiment, the walls that serve as the boundaries between the level 1 area L1, level 2 area L2, and level 3 area L3 of the contaminated area 3 shown in FIGS. 4 to 7 are left in principle. However, it may be removed if necessary. At this time, if a room pressure difference is provided in each contaminated area 3 to be described later, it is preferable to remove the contaminated wall so as not to impede control of the room pressure difference.

Next, another preferred embodiment of the present invention will be explained based on FIGS. 8 and 9.
Low-concentration PCB contaminants are required to be prevented from leaking by attaching/removing the wrapping of airtight containers, wrapping, curing with sheets, etc. in accordance with transportation guidelines. Therefore, in order to transport the contaminated materials outside the site, it is necessary to create an airtight space in the building with a door on the import/export side to prevent leakage.
As a wrapping method, for example, a wrapping machine for wrapping may be used to wrap a closed container or directly wrap a contaminated object.

Even if it is contaminated, by wrapping it and curing it with a sheet, you can prevent leakage of PCBs and eliminate concerns about contamination. Therefore, it is possible to temporarily place the product in the formed temporary storage space 6, and it is possible to prevent the temporary storage space 6 from being contaminated.

In the present invention, for example, it is preferable that the right side of the area L1 of the contaminated area 3 is provided as a wrapping chamber 62, and that wrapping and unwrapping of the closed container, wrapping, sheet curing, etc. are performed in this wrapping chamber 62. Area L1 of contaminated area 3 is located at the border with non-contaminated area 2, and is equipped with a door that can ensure airtightness, and also has airtightness installed at the boundary between areas of different levels to prevent the spread of contamination. Since a door that can be secured is provided, the right side of this area L1 is preferable as a location where the wrapping room 62 is provided.

When sealing the contaminated material in a sealed container in the wrapping chamber 62, the sealed container is transported to the contaminated area 3, the contaminated material is sealed in the sealed container in the contaminated area 3, and the sealed container containing the contaminated material is sealed. is transported to the wrapping chamber 62.

In this case, first, an empty airtight container is wrapped in the wrapping room 62, the wrapped empty airtight container is transported to the contaminated area 3, and the contaminated substance is sealed in the airtight container in the contaminated area 3. The sealed container containing the contaminants is transported to the wrapping chamber 62 and the wrapping of the sealed container is removed, so that the sealed container is not exposed to the contaminants. Thereby, the sealed container can be carried out from the wrapping chamber 62 and temporarily stored in the temporary storage space 6 if necessary. Contaminated materials are often stored in closed containers near the site of dismantling, so by doing the above, it is possible to prevent closed containers brought in from outside from becoming contaminated in contaminated areas.

FIG. 8 is a diagram showing a stage of dismantling and removing the dismantling section 61 shown in FIG. 4 when a wrapping room 62 including a loading door 620 and a loading door 621 is provided, and FIG. It is a figure which shows the stage of disassembling and removing a disassembly part.

The carry-in door 620 of the wrapping room 62 is a door at the boundary between the level 2 area L2 and the level 1 area L1, and the carry-out door 621 is a door at the boundary between the area L1 of the contaminated area 3 and the non-contaminated area 2. These doors can ensure airtightness, and a mechanism has been built in that unless one door is closed, the other door will always remain closed and will not open, i.e., both doors will not be open at the same time. is preferred. This is to prevent the spread of contamination.

In this embodiment, the loading door 620 and the loading door 621, which are the entrances and exits of the wrapping room 62, are existing doors, and a part of the temporary storage space 6 where the existing doors are located can be used as the wrapping room 62. Alternatively, the loading door 620 and the loading door 621 may be formed as temporary doors to provide the wrapping room 62.

In addition, by using the existing ventilation equipment described later, and from the viewpoint of preventing the spread of contamination, a room pressure difference is created in the order of the contaminated area 3, the wrapping room 62, and the temporary storage space 6 other than the wrapping room 62, so that the contaminated area 3 is the most It is preferable to use negative pressure. Further, by providing a wrapping room equipped with an inlet door and an outlet door, and by utilizing existing ventilation equipment, which will be described later, it is possible to more reliably prevent the spread of contamination.

This prevents air from flowing out to the outside, thereby preventing the spread of contamination from the contaminated area 3 to the wrapping room 62, and even if the wrapping room 62 is contaminated, wrapping from the wrapping room can be prevented. It is possible to prevent contamination from spreading to the temporary storage space 6 other than the room 62.

Among the objects to be dismantled in the dismantling department 61 shown in FIG. 8, objects to be dismantled that are classified as contaminated are transported to the wrapping room 62, and the spread of contamination is prevented by removing the wrapping from the airtight container, wrapping, sheet curing, etc. processed as follows. In FIG. 8, if the object to be dismantled classified as a non-contaminated object becomes a hindrance to the transportation of the object to be dismantled which is classified as a contaminated object, the object to be dismantled is classified as a non-contaminated object. It is preferable to move it to avoid it, and leave it in place if it does not get in the way.

Specifically, as shown in FIG. 9, when an object to be dismantled 610 that has been classified as a contaminated object is transported from the loading door 620 to the wrapping room 62, in the stage of FIG. 8, which is the previous stage of FIG. If the remaining object to be dismantled 63 that has been classified as a non-contaminated object is left on the path toward the exit, it may become an obstacle to the transportation of the object to be dismantled 610 that has been classified as a contaminated object. .

In this case, before transporting the object to be dismantled 610 that has been classified as a contaminated object, the object to be dismantled that has been classified as a non-contaminated object that becomes an obstacle to the transportation of the object to be dismantled 610 that has been previously classified as a contaminated object to the wrapping room 62 is 63, for example, as shown in the figure, is moved so as to avoid the passage toward the exit. Thereby, the object to be dismantled 610 classified as a contaminated object can be smoothly transported. As a result, wrapping work and conveyance work can be performed smoothly.

Here, the disassembly and removal method of Patent Document 1 will be explained based on FIG. 10, and the superiority of the present invention will be clarified.
Patent Document 1 states that rooms are to be dismantled in units of rooms, and are to be dismantled in order from the highest management area level to the lowest management area level.

As shown in FIG. 10, the managed area level is divided into level 1 area, level 2 area, and level 3 area depending on the degree of contamination. In the illustrated example, the contamination level increases in the order of L1<L2<L3.
Therefore, the management area levels are in the order of level 3 area L3>level 2 area L2>level 1 area L1 depending on the contamination level.

Patent Document 1 discloses a method in which a facility is dismantled while processing contaminated materials within the facility. In other words, in order to dismantle the management area in the order of processing from high to low in the processing process, the first step is to dismantle and remove level 3 area L3 (area A). Next, in the second stage, level 2 area L2 (area B) is dismantled and removed. The third and final stage is to dismantle and remove level 1 area L1 (area C).

In contrast, the demolition and removal method of the present invention creates a temporary storage space near the exit for dismantling objects, regardless of the area divided into PCB management areas, so the demolition and removal method creates a temporary storage space near the exit, so the demolition and removal method creates a temporary storage space for dismantling objects while securing space. Starting from the one closest to the exit, the contaminated objects installed at the back are dismantled and removed. In other words, the items are dismantled from the exit (discharge route) toward the back while ensuring a space for handling cargo.

In the present invention, it is preferable to dismantle and remove the PCB contaminants while preventing them from leaking to the outside. For this purpose, regardless of the conventional management level, for example, the first stage is from the outside to the uncontaminated area inside the building (see Figure 2), and the second stage is from the uncontaminated area inside the building to the contaminated area. It is also preferable to move forward with demolition work in the 5th stage (see Figures 4 to 7) in area management categories.

Once there are no contaminated substances inside the building, it can be demolished using conventional building demolition methods after confirming that no contaminants are present.

In the present invention, it is more reasonable to dismantle not only contaminated items but also non-contaminated items if the scaffolding can be dismantled together. In this way, the discharge space can be expanded and a large amount of stock can be retained. This has the effect of eliminating the need for items on hand due to unloading arrangements, and making it possible to continue demolition work. Furthermore, by increasing the space, demolition work can be carried out at various locations adjacent to the space, making it possible to shorten the process due to an increase in the amount of work.

Differences between the demolition and removal method of Patent Document 1 and the effects of the present invention can be expressed as follows.

First, in the demolition and removal method of Patent Document 1, in the presence of high concentration PCBs, the demolition and removal is carried out from the highly contaminated area of the controlled area to the less contaminated area while decontaminating the area. On the other hand, in the present invention, high-concentration PCBs are already decontaminated and are dismantled and removed from the exit side toward the back in a state where they are contaminated or non-contaminated with low-concentration PCBs, so as a result, The safety of the transport work is ensured because the contaminants are transported from the area with the lowest level of contamination to the area with the highest level of contamination in the controlled area. Furthermore, the present invention allows dismantled materials to be handled without high-concentration PCBs, making it possible to prevent contamination.

Secondly, in the disassembly and removal method of Patent Document 1, the carry-out route and carry-out size are limited, whereas in the present invention, the carry-out route and carry-out size are free and have no restrictions.

Thirdly, in the dismantling and removal method of Patent Document 1, there is no vacant space for carrying out stock, whereas in the present invention, a large space can be secured on the carrying out port side (exit side).

Fourthly, in the demolition and removal method of Patent Document 1, vacant lots are vacated from high concentration areas, whereas in the present invention, there are many vacant lots, storage can be carried out, carrying out can be adjusted, and there is no waiting time during carrying out. There is no effect.

Fifth, while the demolition and removal method of Patent Document 1 assumes that contaminated materials are treated in-house, the present invention is premised on sending them to a detoxification facility.

Sixth, in contrast to the demolition and removal method of Patent Document 1, where demolition and removal are carried out step by step for each management category, the present invention allows demolition of multiple locations at the same time regardless of the management category, and removes contaminated materials. This has the effect of shortening the time required for removal.

Seventh, in the demolition and removal method of Patent Document 1, the process from decontamination to dismantling of contaminated materials is carried out in-house, and as a result, the method inevitably requires time and effort to transport the objects to be dismantled. , the disassembly process is long, whereas the present invention has the advantage that the disassembly process can be completed in a short period of time.

Next, other preferred embodiments of the present invention will be explained.
Another preferred embodiment is to dismantle and remove the contaminated material while using existing ventilation and exhaust equipment, without installing a roof tent that covers the entire PCB treatment facility. This aspect is shown in FIG.

In order to prevent external leakage of PCBs, there are cases where a shed tent is installed, as shown in the left diagram of FIG. 11. The left diagram in FIG. 11 shows a tent 8 installed on top of a building 7, which is a temporary installation type. 9 is ventilation and exhaust equipment.

However, if the outer wall of the building is solid and airtight, it is possible to maintain airtightness at the outer wall of the building, and the shed tent 8 is not necessary. In the right diagram of FIG. 11, the outer wall of the building is solid and airtight, so airtightness can be maintained at the outer wall of the building, and the shed tent 8 is omitted. This aspect is called an existing diversion type.

Compared to the case where new temporary ventilation and exhaust equipment is installed during demolition work as shown in the left diagram of Figure 11, in the embodiment shown in the right diagram of Figure 11, the existing equipment is reused and the negative pressure inside the building is reduced. Since the system is managed, there is no need to install a shed tent, which shortens the construction period and is economically advantageous.

As shown in the right diagram of Figure 11 for the existing reuse type, contaminated materials are dismantled while the existing ventilation and exhaust system is operated 24 hours a day. In this case, temporary ventilation and exhaust equipment is not required.
In this embodiment, the existing suction ducts 90 and exhaust ducts 91 from each room to be introduced into the ventilation/exhaust equipment 9 in the building 7 can be used, and there is no need to temporarily install new ducts.

In addition, when dismantling rooms with different control areas, setting the pressure in each control room to be the same will prevent PCB contaminants from being re-dispersed due to the airflow that occurs when partition walls are removed, which will help prevent contamination. .

According to a preferred embodiment of the present invention, contaminated materials are dismantled and removed using existing ventilation and exhaust equipment without installing a roof tent that covers the entire PCB treatment facility.

To briefly explain the effects of this aspect, firstly, by using the existing ventilation and exhaust system, there is no scattering of harmful substances from the building during the demolition of contaminated objects, and it is effective in preventing environmental pollution to the surrounding area. be.

Second, when installing a shed tent, it is necessary to install a new temporary ventilation and exhaust system for the shed tent, but in this case, since the shed tent is not installed, a temporary ventilation and exhaust system is required. No need to install.

Third, by using the outer wall of an existing building that has strong airtightness, it is possible to obtain the same effect as installing a shed tent.

Furthermore, fourthly, not only is the construction work for installing a shed tent a major undertaking, but the foundation work for a shed tent requires the driving of dozens of piles, whereas the present invention Foundation work can be omitted. Further, it is possible to avoid a situation where the shed tent itself becomes contaminated and becomes contaminated waste.

Furthermore, fifthly, according to the present invention, the existing living room can be used even during the period of dismantling contaminated materials.

Furthermore, sixthly, the period during the construction period when the number of workers is the greatest is during the demolition period of contaminated materials, so if the existing construction can be reused at this time, the temporary construction house can be kept small.

Furthermore, seventhly, after the demolition and removal of contaminated objects is completed, all of the contaminated objects are removed and the rest are non-contaminated buildings and equipment, so they can be demolished using the same method as for demolition of ordinary buildings.

In addition to the above-mentioned effects, by using existing ventilation equipment to create a negative pressure in the highly contaminated area of Contaminated Area 3 and creating a room pressure difference with other areas, contamination can be reduced. The scattering of harmful substances from the contaminated area 3 to the non-contaminated area 2 during dismantling of objects is eliminated, and environmental pollution to the outside can be reliably prevented.

Furthermore, as shown in FIGS. 9 and 10 described above, when the wrapping room 62 is provided, the wrapping room 62 is installed in a part of the temporary storage space 6, so the non-contaminated area 3 and the contaminated area 2 are separated. It is preferable to use existing ventilation equipment for this purpose.

By using the existing ventilation equipment between the wrapping room 62, the contaminated area 3, and the non-contaminated area 2, the contaminated area 3 is made the most negative pressure, and the pressure is increased in the order of the wrapping room 62 and the non-contaminated area 2. and create a room pressure difference.

Further, the pressure in the non-contaminated area is made more negative than in the atmosphere so that no airflow is generated on the atmosphere side between the non-contaminated area 2 and the atmosphere. Specifically, since the temporary storage space 6 formed in the non-contaminated area forms a boundary with the atmosphere via the export port 4, a room pressure difference between the temporary storage space 6 and the outside (atmosphere) is provided. It is preferable to set the temporary storage space 6 so that the pressure is more negative than atmospheric pressure. This makes it possible to more reliably prevent pollutants from flowing into the atmosphere.

By building a mechanism to create room pressure differences in this way, it is possible to appropriately control these room pressure differences, prevent pollutants from flowing into the atmosphere under any circumstances, and further reduce environmental pollution. This can be reliably prevented.

1: PCB treatment facility 2: Non-contaminated area 3: Contaminated area 4: Exit 6: Temporary storage space 6a: Part of non-contaminated area 6b: Area reduced to non-contaminated level through decontamination treatment 7: Building 8: Shed tent 9: Ventilation and exhaust equipment 90: Suction ducts 91: Discharge ducts 10: Building 61: Demolition department 610: Object to be dismantled 62: Wrapping room 620: Carrying in door 621: Carrying out door 63: Object to be dismantled

Claims (7)

When dismantling and removing all objects to be dismantled, including equipment, equipment, piping, wiring, or buildings existing in the PCB treatment facility,
dismantling and removing the object to be dismantled and forming a temporary storage space in which the object to be dismantled is temporarily stored in a non-contaminated area near an exit in a building of a PCB processing facility;
Carrying out the objects to be dismantled that have been classified as contaminated objects among the objects to be dismantled to the temporary storage space and making them wait for a predetermined period of time;
A method for dismantling and removing a PCB processing facility, characterized by the following. Among the objects to be dismantled, the objects to be dismantled that are classified as non-contaminated objects are removed after moving the non-contaminated objects that obstruct the removal of the contaminated objects to a position away from the passage leading to the exit. carrying out the objects to be dismantled that have been classified as contaminated objects to the temporary storage space;
2. The method for dismantling and removing a PCB treatment facility according to claim 1 . Among the objects to be dismantled, the non-contaminated objects that are classified as non-contaminated objects are left behind, and the non-contaminated objects are left in the temporary storage space, and the contaminated objects among the objects to be demolished are left in the temporary storage space. Transporting objects to be dismantled that have been divided into objects,
3. The method for dismantling and removing a PCB treatment facility according to claim 1 or 2 . A wrapping room equipped with a temporary door that does not open the entrance and exit at the same time is provided in a part of the temporary storage space;
2. The method for dismantling and removing a PCB treatment facility according to claim 1 . The wrapping room is provided with a wrapping machine, and the wrapping machine wraps the object to be dismantled that has been classified as a contaminated object.
5. The method for dismantling and removing a PCB processing facility according to claim 4 . Instead of setting up a shed tent that covers the entire PCB treatment facility, we use existing ventilation and exhaust equipment to create a negative pressure in highly contaminated areas and create a room pressure difference with other areas. dismantling and removing objects classified as contaminated objects;
The method for dismantling and removing a PCB processing facility according to any one of claims 1 to 5 . Instead of installing a shed tent that covers the entire PCB processing facility, the existing ventilation and exhaust equipment is used to create a negative pressure in the wrapping room, creating a pressure difference with areas other than the wrapping room, and eliminating the contaminants. Wrapping the separated objects to be dismantled,
7. The method for dismantling and removing a PCB processing facility according to claim 4 , 5 or 6 .

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