JP6771280B2 - Sludge water waste treatment system - Google Patents

Description

The present invention relates to a sludge water disposal system for disposing of asbestos-containing sludge water removed by a method of removing asbestos-containing lining material in a chimney with ultra-high pressure water.

In buildings constructed in the Showa era, asbestos was used as a fireproof coating material such as the ceiling, walls or steel frames of a room, a heat insulating material, a sound absorbing material, and a heat insulating material. In addition, most of the chimneys of a tubular structure connected to a boiler or the like are provided with an asbestos-containing lining material (chimney asbestos heat insulating material, asbestos cylindrical tube, etc.) formed in a compressed tubular shape by a binder on the inner wall of the chimney. Was there.
However, asbestos is currently being regulated because it is known that inhalation of asbestos causes malignant mesothelioma. In addition, for buildings that use asbestos, the buildings are dismantled or asbestos is removed.

In the asbestos treatment of the chimney, in order to prevent the asbestos fibers generated during the work such as asbestos removal from diffusing outside the removal work area, the chimney head, for example, in the method of removing the asbestos-containing lining material of the chimney. Curing is performed to isolate and seal the lower part of the chimney.
Further, as a construction method used for removing asbestos in a chimney, a method of removing asbestos-containing lining material with ultra-high pressure water is known. For example, as shown in FIG. 2, an ultra-high pressure water injection device (asbestos removal device) is suspended from the chimney head to the inside of the chimney so that it can be raised and lowered, and from an ultra-high pressure water generation pump installed outside the ultra-high pressure water injection device. Supply ultra-high pressure water. The ultra-high pressure water is sprayed from the injection nozzle of the ultra-high pressure water injection device onto the asbestos-containing lining material of the chimney, and the lining material is peeled or crushed to be removed.
The asbestos-containing lining material of the removed chimney is scraped out from the scraping port 20 at the bottom of the chimney by a plurality of workers in the isolation curing area 28 (working area at the bottom of the chimney) provided by curing at the bottom of the chimney. It is packed in bags, taken out as industrial waste, and disposed of.
Further, in the method of injecting ultra-high pressure water onto the asbestos-containing lining material of the chimney to remove it, sludge water 12 containing asbestos generated at the time of removal collects in the scraping port 20 at the lower part of the chimney. The sludge water 12 is treated with a water absorbing agent or the like in a high temperature state in the isolated curing area 28, packed in a bag, and disposed of.

The asbestos-containing sludge water generated during removal in the method of injecting ultra-high pressure water onto the asbestos-containing lining material of the chimney, that is, the sludge water 12 collected in the scraping port 20 at the bottom of the chimney has a high temperature of about 60 ° C. It is a thing. In addition, the temperature inside the isolation curing area 28 becomes around 50 ° C, and workers wearing protective clothing can use the sludge water 12 and the removed asbestos-containing lining material in the high-temperature work area (hereinafter, "" It was called "asbestos-containing material"). However, even if asbestos dust could be removed with protective clothing, heat insulation and heat insulation could not be achieved, and bagging work in a hot and humid work area was harsh for workers.
Currently, there is provided a method for removing an embedded asbestos pipe capable of improving the working environment in a method of injecting ultra-high pressure water into the asbestos-containing lining material of the chimney and removing the asbestos-containing lining material, and an apparatus therefor (for example, Patent Document 1). ).

Japanese Unexamined Patent Publication No. 2006-83600

In the asbestos-containing treatment system described in Patent Document 1, a suction hose is connected to the heat exhaust port at the lower end of the asbestos pipe by connecting the asbestos-containing material removed by the asbestos removal method of crushing the asbestos pipe of the chimney with ultra-high pressure water. It is removed using a vacuum truck. According to the asbestos-containing treatment system described in Patent Document 1, since the suction hose of the vacuum truck is connected to the heat exhaust port at the lower end of the asbestos pipe, it is not necessary to isolate and cure the heat exhaust port at the lower end of the asbestos pipe. That is, it is not necessary to provide the isolated curing area of FIG. 2, and the bagging work in the isolated and cured high temperature working area can be avoided.

However, in the asbestos-containing waste disposal system that sucks and removes asbestos using a vacuum truck, the asbestos-containing material sucked into the vacuum truck is transported to the asbestos-containing sedimentation separation treatment plant provided in the removal work site. Disposal work (packing, etc.) of asbestos-containing substances was being carried out. Therefore, it was necessary to secure a wide range of removal work sites for the placement of vacuum trucks and sedimentation separation treatment plants. In addition, the removal of asbestos-containing substances required three steps of suction, transportation, and storage. In addition, the purchase of a vacuum truck was very expensive.

In order to solve the above problems, the present invention can improve the working environment of the isolated curing area for disposing of sludge water accumulated in the scraping port at the lower part of the chimney, and can easily secure the removal work site and reduce the work cost. The purpose is to provide an industrial waste treatment system.

The sludge water disposal system of the present invention is a sludge water disposal system that disposes of asbestos-containing sludge water generated by a method of injecting ultra-high pressure water onto the asbestos-containing lining material of a chimney to remove it. The first isolation curing area, which is provided at the lower scraping port and performs the work of sucking sludge water, and the sludge water bagging , which is provided at a location different from the first isolation curing area and is stored in the storage tank. a second isolation curing zone to perform the work, and an air conveyor for conveying by suction sludge water from scraped port chimney bottom of the first isolation curing zone to the storage tank of the second isolation curing zone, the air conveyor By sucking sludge water from the scraping port at the bottom of the chimney of the first isolated curing area and air-transporting it to the storage tank of the second isolated curing area, the indoor temperature of the first isolated curing area and the second isolated curing area can be adjusted. In addition to lowering it, it is intended to prevent the spread of steam to the first isolation and curing area .

INDUSTRIAL APPLICABILITY The present invention is a method of injecting ultra-high pressure water onto an asbestos-containing lining material of a chimney to remove it, and can reduce the indoor air temperature of an isolated curing area for disposing of asbestos-containing substances such as sludge water. As a result, the working environment of the isolated curing area can be improved. Further, by using an air carrier as a means for transporting asbestos-containing substances, the transport time can be shortened and the construction cost can be reduced.

It is a figure which shows the sludge water waste treatment system of this invention. It is a figure which shows the conventional sludge water waste treatment system.

The present invention realizes improving the temperature of a working area in the disposal treatment of asbestos-containing substances such as sludge water in a construction method in which ultra-high pressure water is sprayed onto the asbestos-containing lining material of a chimney to remove it.

The sludge water waste treatment system of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a sludge water waste treatment system of the present invention. FIG. 2 is a diagram showing a conventional sludge water waste treatment system.
The sludge water waste treatment system 10 of the present invention is a sludge water waste treatment system that disposes of sludge water 12 containing asbestos generated by a method of injecting ultra-high pressure water onto the asbestos-containing lining material of a chimney to remove it. The first isolated curing area 14 which is provided at the scraping port 20 at the lower part of the chimney and performs the work of sucking the sludge water 12, and the sludge water 12 which is provided at a place different from the first isolated curing area 14. An air carrier 18 that sucks sludge water 12 from the second isolated curing area 16 for disposal work and the scraping port 20 at the bottom of the chimney of the first isolated curing area 14 and conveys it to the storage tank 22 of the second isolated curing area 16. The sludge water 12 is disposed of in the first isolated curing area 14 and the second isolated curing area 16 by operating the air carrier 18 (FIG. 1).
In the method of removing the asbestos-containing lining material of the chimney by injecting ultra-high pressure water, sludge water 12 containing asbestos at about 60 ° C. is generated. Due to the generation of the high temperature sludge water 12, the room temperature of the first isolation curing area 14 in FIG. 1 and the room temperature of the isolation curing area 28 in FIG. 2 become about 50 ° C.

The first isolation curing area 14 is an area for isolating and curing the scraping port 20 (the scraping port of the removed asbestos-containing lining material) at the lower part of the chimney, and the work of sucking the sludge water 12 containing asbestos accumulated in the scraping port 20. The area. In the present invention, since it is sufficient for one worker to suck the sludge water 12, the first isolation curing area 14 can be provided even at a removal work site where only a narrow space can be secured.
The second isolation curing area 16 is a work area for storing sludge water 12 transported from the first isolation curing area 14 and bagged (disposal) after coagulation and precipitation treatment. The storage tank 22 for storing the sludge water 12 and the place where the area where the sludge water 12 can be packed can be secured are isolated and cured.
The storage tank 22 coagulates and precipitates the sludge water 12 transported from the first isolation curing area 14.

The air carrier 18 includes an air carrier main body 18a (ejector), a suction duct hose 18b, a discharge duct hose 18c, and a compressor 18d (compressed air). The air carrier main body 18a uses compressed air as the driving energy, and can convey solid matter, powder, and the like. It is used for collecting sand, powder, etc. because it does not have a complicated structure or protrusions inside and can suck, transport, and discharge at the same time. As a commercially available air carrier main body 18a, there is a trade name "Jector" or the like.
A suction duct hose 18b, a discharge duct hose 18c, and a compressor 18d are connected to the air carrier main body 18a. When compressed air is supplied from the compressor 18d to the air carrier main body 18a, the conveyed object is sucked from the suction port 24 of the suction duct hose 18b, and the sucked conveyed object is the suction duct hose 18b, the air carrier main body 18a, It passes through the discharge duct hose 18c and is discharged from the discharge port 26 of the discharge duct hose 18c. In the present invention, the suction port 24 of the suction duct hose 18b is arranged at the scraping port 20 at the lower part of the chimney, and the discharge port 26 of the discharge duct hose 18c faces the storage tank 22 in the second isolation curing area 16. The sludge water 12 collected in the scraping port 20 at the lower part of the chimney is transported (pumped) to the storage tank 22 by the operation of the air carrier 18.
As described above, the separate steps of suction, transportation, and storage, which have been conventionally performed in the removal of asbestos-containing substances, can be simultaneously performed by using the air transporter 18. Furthermore, the construction cost can be reduced by using the air carrier 18 which is cheaper than the vacuum truck.

(Experimental example: sludge water waste treatment system of the present invention)
The present invention was carried out on a day when the outside air temperature was 27 ° C. in the chimney asbestos removal work using a method of injecting ultra-high pressure water to remove the asbestos-containing lining material of the chimney (Fig. 1). A commercially available product (trade name "Jector") was used for the air carrier main body 18a. At this time, the temperature of the sludge water 12 of the first isolation curing area 14, the room temperature of the first isolation curing area 14, the room temperature of the second isolation curing area 16, and the temperature of the sludge water 12 of the storage tank 22 of the second isolation curing area 16. Was measured.

(Comparative example: Conventional sludge waste treatment system)
In the chimney asbestos removal work using a method of spraying ultra-high pressure water to remove the asbestos-containing lining material of the chimney, the scraping port 20 at the bottom of the chimney shown in FIG. 2 is isolated and cured on a day when the outside air temperature is 20 ° C. In the curing area 28, the sludge water 12 was treated with a water absorbing agent and the sludge water 12 was bagged. At this time, the temperature of the sludge water 12 in the isolated curing area 28 and the room temperature of the isolated curing area 28 were measured.
The isolation curing area 28 of the comparative example is an area where all disposal work such as bagging and treatment of sludge water 12 with a water absorbing agent is performed (FIG. 2).
The measurement results of the experimental example and the comparative example are shown in Table 1. The temperature of the sludge water 12 in the isolated curing area 28 and the room temperature of the isolated curing area 28 in the comparative example are the temperature of the sludge water 12 in the first isolated curing area 14 and the room temperature of the first isolated curing area 14 in the experimental example. Each is described in.

In the above experimental example and the comparative example, the temperature of the sludge water 12 in the first isolated curing area 14 of the experimental example was 62 ° C., and the temperature of the sludge water 12 in the isolated curing area 28 of the comparative example was about 58 ° C.
However, in the experimental example, the room temperature of the first isolation curing area 14 was 32 ° C., and the difference from the temperature of the sludge water 12 of the first isolation curing area 14 of 62 ° C. was as much as 30 ° C. Further, the room temperature of 32 ° C. in the first isolation curing area 14 was a temperature that could withstand the suction work of the sludge water 12 (and the work of removing asbestos-containing substances other than the sludge water).
On the other hand, the room temperature in the isolated curing area 28 of the comparative example is 47 ° C. (when the outside air temperature is 27 ° C, which is the same as that of the experimental example, it is expected that the room temperature of the isolated curing area may be close to 50 ° C.). The difference from the temperature of the sludge water 12 in the isolation curing area 28 at 58 ° C was only 11 ° C. The room temperature in the isolated curing area 28 of the comparative example was 47 ° C., which was an unbearable temperature for disposal work such as bagging of sludge water 12.
Further, in the present invention, the room temperature of the second isolation curing area 16 where the bagging work is performed is 33 ° C., which is almost the same as the room temperature of the first isolation curing area 14, and is at a temperature that can withstand the disposal work of the bagging. there were. Further, the temperature of the sludge water 12 in the storage tank 22 was 41 ° C. Since the sludge water 12 having an extremely lower temperature than the sludge water 12 having a temperature of about 60 ° C. packed in the isolated curing area 28 of the comparative example could be obtained, the bagging could be easily performed.
As described above, the isolation curing area for disposing of the high-temperature sludge water 12 accumulated in the scraping port 20 at the lower part of the chimney, the first isolation curing area 14 for sucking the sludge water 12, and the disposal work for the sludge water 12. The sludge water 12 is sucked from the scraping port 20 at the lower part of the chimney of the first isolation curing area 14 by using the air carrier 18 to divide the second isolation curing area 16 into two working areas. By transporting to the storage tank 22 of the above, the indoor temperature of the isolated curing areas 14 and 16 could be lowered.
Further, in the chimney asbestos removal work using the method of injecting ultra-high pressure water to remove the asbestos-containing lining material of the chimney, steam is generated when the lining material is removed by injecting ultra-high pressure water. In the comparative example, the isolated curing area 28 was filled with steam, and the work was forced to work in a state where the visibility was poor and the surroundings could not be seen. On the other hand, in the experimental example, the steam did not spread to the first isolation curing area 14, and the work could be performed in a favorable environment.
As described above, it was found that in the isolated curing areas 14 and 16 of the present invention, the heavy labor of the disposal work of asbestos-containing substances such as sludge water can be reduced.

In addition, since the first isolation curing area 14 (sludge water transport source location) and the second isolation curing area 16 (sludge water transport destination location) are separately installed, waste of asbestos-containing substances such as sludge water is disposed of at the lower part of the chimney. Since it is not necessary to provide a large work area for processing, it is easy to secure a removal work site. Furthermore, since the air carrier 18 is used, it does not take time to transport the sludge water, and the disposal can be done without spending a large amount of money such as purchasing a vacuum truck, so that the construction cost can be reduced.
As described above, according to the present invention, it is possible to improve the working environment of the isolated curing area for disposing of asbestos-containing substances such as sludge water, and it is possible to easily secure the removal work site and reduce the work cost.

10 Sludge water disposal system 12 Sludge water 14 First isolation curing area 16 Second isolation curing area 18 Air carrier 20 Scraping port at the bottom of the chimney 22 Storage tank

Claims (1)

A sludge water disposal system that disposes of asbestos-containing sludge water generated by a method of spraying ultra-high pressure water onto the asbestos-containing lining material of the chimney, and is provided at the scraping port at the bottom of the chimney. The first isolated curing area where sludge water is sucked in, and the second isolated curing area where sludge water stored in a storage tank is packed in a place different from the first isolated curing area. It is equipped with an air carrier that sucks sludge water from the scraping port at the bottom of the chimney in the first isolated curing area and transports it to the storage tank in the second isolated curing area, and uses an air carrier to lower the chimney in the first isolated curing area. By sucking sludge water from the scraping port and air-transporting it to the storage tank in the second isolated curing area, the indoor temperature of the first isolated curing area and the second isolated curing area is lowered, and steam is sent to the first isolated curing area. A sludge waste treatment system characterized by preventing the spread of sludge.

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