JPH0722760B2 - Abrasive jet cutting slurry processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention occurs during an abrasive jet cutting operation in which a granular material is sprayed together with a high-pressure water jet onto a building such as a wall to cut the building. TECHNICAL FIELD The present invention relates to a slurry processing device that processes a slurry.

[Prior Art] In standard remodeling work, for example, in the work of remodeling two rooms (two houses) into one room (one house) in an apartment house or the like, usually one wall is cut and opened one day. Perform the work to do. If an abrasive jet is used in this cutting and opening operation, a slurry of about 2 m ³ will be generated. The slurry generated by such an abrasive jet cutting operation is treated as industrial waste and cannot be disposed of in sewers from the viewpoint of environmental protection. Therefore, treatment or disposal of the slurry required a great amount of cost in the past. .

FIG. 3 shows an outline of a conventional method of treating the slurry. As indicated by an arrow O, the slurry S is received in the steel water tank 2 from the abrasive jet cutting work site (not shown) via the transport pipe 1. This aquarium 2 has a volume of 6 m ³ and, although only one is shown in FIG. 3, two are provided at the actual work site. That is, 12 m ³ (six days' worth) of slurry is stored in the steel water tank. Then, when the slurry for 6 days is stored, the slurry S is sucked into the vacuum car 4 by the suction hose 3 and is then made to be collected by the industrial waste disposal company. Since the tank capacity of the vacuum car 4 is generally 6 m ³ , the vacuum car 4 makes two round trips between the abrasive jet cutting work site and the industrial waste treatment company, or two vacuum cars are used. Be prepared.

[Problems to be Solved by the Invention] However, since the fee paid to the industrial waste treatment company is high in proportion to the volume of the slurry and the usage fee of the vacuum car is also required to be paid, the conventional slurry treatment method described above is required. The cost of the project will be extremely high, and it will account for a very large portion of the renovation work contract amount. As a result, when the conventional slurry processing method is used, the cost of the entire abrasive jet cutting operation becomes high, which causes a problem that the economical efficiency is deteriorated.

Moreover, in the conventional slurry treatment method, when the vacuum car 4 is in a vacuum operation (about 6 m ³ of slurry is taken
There is a problem in that the advantage of low noise in the abrasive jet cutting work is offset by the engine noise and vibration (which takes 1.5 hours).

Therefore, for example, JP-A-60-226970 and JP-A-62-2215.
As seen in No. 00 publication, the abrasive material is first separated and reused from the slurry generated at the abrasive jet cutting work site, and then solid matters such as cut pieces are separated from the remaining slurry to form a dehydrated cake. It has been proposed that clarification treatment is performed in a clarification tank and the supernatant is discharged.

According to this technology, the volume of waste can be reduced, and the problems of the conventional technology described above can be solved to some extent, but problems still remain in terms of transportation of dehydrated cake, disposal of waste cake, etc. The processing equipment is large-scale, and it takes time to transport and install it, and the construction situation is relatively small, such as the renovation work of a house such as an apartment, but it is a short-term construction work at many places. Is not suitable for handling.

Therefore, the present invention not only aims to reduce the volume of the waste when treating the slurry generated by the abrasive jet cutting, but also facilitates the transportation and final disposal of the waste, and the construction of a large number of sites. The purpose of the present invention is to provide an abrasive jet cutting slurry treatment device that can be easily transported and installed on site.

[Means for Solving the Problems] Therefore, according to the present invention, a container for storing the solid component separated by solid-liquid separation by introducing the slurry generated at the abrasive jet cutting work site is detachably installed. Liquid separation device, solid water separated by solid-liquid separation device Introducing polluted water Clarifying device separating polluted components from contaminated water, and supernatant liquid separated by contaminated components by fining device is introduced and pH adjustment There is provided an abrasive jet cutting slurry treatment device comprising a pH adjusting device for performing and discharging and performing the solid-liquid separation device, the refining device and the pH adjusting device as a unit.

[Operation] Since the slurry treatment device is unitized, it is put on a truck as it is and transported to a construction site, for example, a condominium remodeling site for use. At this time, since the respective devices of the slurry treatment device are connected in advance, it is not necessary to assemble them by connecting pipes or the like on site.

A container such as a drum can is installed in the slurry processing device, and the slurry generated by the abrasive jet cutting is introduced and separated into a solid component and a liquid component by a solid-liquid separation device. Solid components are packed in a container such as a drum and stored. Here, the volume of the solid component of the slurry is about 1/8 that of the liquid component, and the solid component packed in a drum or the like is taken by an industrial waste disposal company.

On the other hand, the liquid component of the slurry is introduced into a clarification device to separate polluted components, and the supernatant liquid is introduced into a pH adjusting device to adjust the pH. As a result, even if it is discharged into the general sewer, there is no risk of causing environmental problems such as pollution of rivers, and it is discharged into the sewer and discarded.

When the abrasive jet cutting work in the renovation work of the condominium is completed, the slurry processing device is mounted on a truck and transported to the renovation work site of another condominium where the renovation is performed, and the slime generated by the abrasive jet cutting is processed.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a cross-sectional view showing an example of the abrasive jet cutting slurry treating apparatus of the present invention, and is generally indicated by reference numeral 10. The slurry generated at the abrasive jet cutting work site (not shown) passes through the transport pipe 12 via a sand pump (not shown). Then, it is introduced into the drum 14 which is a container for storing solid components. The drum can 14 has a capacity of, for example, 200 l, and is provided with a mesh filter 16 having a mesh size of 1 mm so that solid components in the slurry do not float above the mesh filter 16. ing. A clogging preventing scraper 18 is attached to the mesh filter 16, and the scraper 18 constantly rotates at a low speed (2 rpm) to scrape off the solid components adhering to the eyes of the mesh filter 16.

The liquid above the mesh filter 16, that is, the contaminated water composed of the slurry that has been solid-liquid separated, is sent to the clarification tank 24 via the pipe 20 and the self-priming pump 22. A coagulant addition device 26 and a stirring device 28 are provided above the clarification tank 24. Then, the coagulant is added from the coagulant addition device 26 into the refining tank 24, and the agitating device 28 sufficiently mixes the polluted water and the coagulant in the refining tank. As a result, pollutant components such as fine solid particles settle and accumulate at the bottom of the clarification tank 24 (indicated by symbol S).

The supernatant liquid in the upper part of the clarification tank, that is, the liquid component of the clarified slurry, is once introduced into the clarification water tank 30 in order to prevent mixing with polluted water, and then flows into the pH adjusting tank 32. The pH adjusting tank 32 is divided by a partition plate 34 into an upstream side 32A and a downstream side 32B.
It is roughly divided into and. And at the upper part of the upstream side 32A, p
An H adjuster addition device 36 and a stirring device 38 are provided, and a pH measuring device 40 is provided on the downstream side 32B. The pH adjusting agent is added from the pH adjusting agent adding device 36 and mixed with the clarified slurry liquid component by the stirring device to adjust the pH to an appropriate value. Here, the pH measuring device 40 and the pH adjusting chemicals adding device 36 may be interlocked with each other to control the pH to be maintained at a constant value.

The pH-adjusted slurry liquid component is discharged and discharged to the general sewer through the discharge port 42.

In FIG. 1, reference numeral 44 indicates a lifting device for the drum can 14. This lifting device 44 lowers the drum can 14 from the position shown in FIG. 1 after completion of the abrasive jet cutting work of one day, and separates the solid-liquid separation device including the mesh filter 16 and the scraper 18 from the drum can 14. The drum can 14 in which the slurry solid component is stored is removed from the processing apparatus 10 and used to install a new drum can. Then, the taken out drum can 14 is handed over to an industrial waste disposal company and disposed of.

In addition, the fine particles that have settled (S) on the bottom of the fining tank 24 are removed from the bottom of the fining tank 24 after one construction period, for example, after the completion of the renovation work for all the apartments, and the same as the drum can 14 by the processor. Be disposed of.

Then, a solid-liquid separation device including a mesh filter 16, a scraper 18, a container elevating device 44, and the like, a clarification device including a clarification tank 24, a coagulant addition device 26, a stirring device 28, a clarification water tank 30, and a pH adjustment tank. 32, partition plate 34, pH adjuster addition device 3
As shown in FIG. 1, the pH adjusting device including the agitating device 38, the pH measuring device 40, etc. is integrated and unitized, and can be used by being carried on a truck as it is. Since each device is connected in advance, it can be used in the field without assembly such as piping connection. And after finishing the slurry treatment at one construction site,
The unitized device is placed on a truck and transported to the next construction site for slurry treatment.

Next, the slurry treatment process will be described with reference to FIGS. 1 and 2.

Abrasive jet cutting work (step S1 in Fig. 2)
The slurry generated by is solid-liquid separated by the mesh filter 16 in the drum can 14 in FIG. 1 (step S2).

The separated solid components are accumulated in the drum can 14 as they are (step S3), and after the work of one day is completed, they are removed from the unit 10 together with the drum can 14 and handed over to a processor.

On the other hand, the liquid component (polluted water) is clarified in the clarification tank 24 to be in a state containing no solid particles (step S4). And
The pH is adjusted in the pH adjusting tank 32 (step S5). The slurry liquid components that have passed the above steps S2, S4, S5 are completely harmless liquids in terms of environmental protection, so they can be discharged from general sewers (step S
6).

The amount of slurry generated in step S1 is, for example, 15
Maximum of 2 m ³ per day at l / min. Garnet is contained in the slurry at a rate of 3 kg / min, and the maximum amount of garnet produced per day is 0.2 m ³ . In this case, the specific gravity of the slurry is 2 and the pH is 10 or more, indicating strong alkalinity.

[Effects of the Invention] The invention described above has the following effects.

(1) The treatment of solid components is easy.

The wet solid component (garnet + concrete cutting waste) separated from the liquid component automatically accumulates in the drum can, so after the day's work, the drum can is lowered by the elevating device and the drum can is separated by the solid-liquid separation means. Remove and move and replace with empty drum. And since this solid component can be passed to the industrial waste contractor as a drum, it is possible to perform a clean construction of the abrasive jet cutting work.

(2) The device used is compact and easy to install.

The slurry treatment device is a unit in which a solid-liquid separation device, a clarification device and a pH adjusting device are integrated into one unit,
It becomes compact and can be easily transported to the construction site for installation by mounting it on a truck as it is. At that time, since each device is connected in advance, assemble pipe connections etc. on site It can be used as it is. For this reason, it is most suitable for construction work involving abrasive jet cutting work, which is a short-term construction work, such as remodeling work for houses such as condominiums. Further, the slurry treatment device can be of a truck mount type without having to be loaded and unloaded on the truck each time it is moved.

(3) The operation is easy.

Since each system used for implementing the present invention can be automatically operated, it is easy to operate and maintenance-free.

(4) Cost reduction is realized.

The amount of waste that needs to be treated can be reduced.
Therefore, the processing cost can be significantly reduced.

(5) Environmental conservation measures are taken sufficiently. In addition, if the pH measuring device installed in front of the discharge port constantly measures the pH of the discharged slurry liquid component and records it in the recording means provided in the control panel, it is possible to protect the environment. It is suitable.

(6) Clean processing with low noise and no vibration can be achieved.

[Brief description of drawings]

FIG. 1 is a sectional front view of an abrasive jet cutting slurry treating apparatus according to an embodiment of the present invention, FIG. 2 is a process diagram explaining a step of treating slurry by the slurry treating apparatus shown in FIG. FIG. 1 is a schematic diagram showing an aspect of conventional slurry processing. 14 …… drum, 16 …… mesh filter, 18 …… scraper, 22 …… self-priming pump, 24 …… refining tank, 26 …… coagulant addition device, 28 …… stirring device, 30 …… refining water tank, 32 ...
… PH adjusting tank, 34 …… partition plate, 36 …… pH adjusting agent addition device,
38 …… Stirring device, 40 …… pH measuring device

Claims (1)

[Claims] 1. A solid-liquid separation device in which a container for storing solid components separated by solid-liquid separation into which slurry generated at an abrasive jet cutting work site is detachably installed and a solid-liquid separation device is used. A clarification device that separates polluted components from polluted water into which the separated polluted water is introduced, and a pH adjustment device that discharges the supernatant liquid by which the polluted components separated by the clarification device are introduced and discharged. An abrasive jet cutting slurry treatment device comprising a solid-liquid separation device, the clarification device, and the pH adjustment device that are integrated into a unit.