Sludge recovery method and sludge recovery system

Abstract

To more efficiently recover sludge generated during pavement cutting work.SOLUTION: A recovery method for sludge S which is generated by cutting a pavement surface P and contains dust such as cuttings, soil and sand, and water includes a tank installation step S11 for installing a storage tank 1, a sludge storage step S12 for allowing the sludge S to flow into the storage tank 1 and storing it, and a sludge recovery step S13 for recovering the sludge S stored in the storage tank 1 into a recovery tank 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sludge recovery method and recovery system, and more particularly to the recovery of sludge containing dust and the like generated during road construction work. [Background technology]

[0002] When cutting or slicing pavement in road construction, a method using water (wet cutting) is used to cool the cutting machine and prevent dust from scattering.

[0003] Wet cutting generates dust containing fine cutting chips of the cut concrete and asphalt, and sludge containing water.

[0004] Such sludge is treated as industrial waste and must be collected and disposed of appropriately, and cutting machines that combine the functions of sludge collection and disposal are widely used.

[0005] For example, the road surface cutting system described in Patent Document 1 has a suction means for sucking polluted water generated by cutting from the road surface, and a treatment device for treating the polluted water by coagulation and sedimentation, and can cut the road surface while collecting and treating the polluted water. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 3270426 Summary of the Invention [Problem to be solved by the invention]

[0007] On the other hand, even with the cutting machines described above, it is difficult to collect all of the sludge, and the sludge remaining on the road surface is generally collected using large wet vacuum cleaners or the like.

[0008] In addition, when cleaning up after cutting work is completed, it is necessary to use a vacuum cleaner, sponge, etc. to remove the sludge while blocking it just before the rainwater manhole so that it does not flow into the manhole.

[0009] With the above method, sludge collection work is carried out in parallel with road surface cutting work, which means that a large number of workers must be added, the equipment to be used (such as large wet vacuum cleaners and generators to operate them), the work space must be secured, and the work costs must be high, resulting in a significant burden.

[0010] The present invention has been made in consideration of the above-mentioned problems, and proposes a sludge recovery method and the like that can more efficiently recover sludge generated during pavement cutting work. [Means for solving the problem]

[0011] In order to solve the above problems, the present invention provides a method for collecting sludge containing dust and water generated by cutting pavement surfaces, which includes a tank installation process for installing a storage tank, a sludge storage process for flowing the sludge into the storage tank and storing it, and a sludge recovery process for recovering the sludge stored in the storage tank into a recovery tank.

[0012] According to the present invention, since sludge can be stored in the storage tank, the number of times sludge recovery work is performed can be reduced, and the sludge recovery work can be performed efficiently.

[0013] In a preferred embodiment of the present invention, in the tank installation step, the storage tank is installed at a position lower than the pavement surface.

[0014] This configuration makes it easier to collect sludge in the storage tank, further improving work efficiency.

[0015] In a preferred embodiment of the present invention, in the tank installation step, the storage tank is installed in a manhole.

[0016] With this configuration, sludge can be collected using existing manholes such as catchment manholes, connecting manholes, or the like, making it possible to collect sludge more efficiently.

[0017] In a preferred embodiment of the present invention, in the sludge recovering step, the sludge stored in the storage tank is sucked up and recovered into the recovery tank by reducing the pressure inside the recovery tank.

[0018] With this configuration, sludge recovery work from a storage tank installed at a low position to a recovery tank located at a higher position can be carried out relatively easily, further improving the overall work efficiency of the sludge recovery work.

[0019] In a preferred embodiment of the present invention, the method further includes, after the sludge collection step, a sludge discharge step of discharging the sludge in the collection tank into a treatment tank, and a sludge treatment step of treating the sludge in the treatment tank.

[0020] With this configuration, sludge collection and treatment can be completed efficiently at the work site.

[0021] In a preferred embodiment of the present invention, in the sludge discharging step, the inside of the recovery tank is pressurized, thereby forcing the sludge in the recovery tank out and discharging it into the treatment tank.

[0022] With this configuration, the sludge can be discharged from the recovery tank to the treatment tank relatively easily, further improving the overall work efficiency.

[0023] Another aspect of the present invention is a sludge recovery system including a storage tank, a recovery tank, a pipe, and a pressure reducer.

[0024] The sludge recovery system having such a configuration realizes the sludge recovery method of the present invention. [Effects of the Invention]

[0025] According to the present invention as described above, it is possible to more efficiently collect sludge generated during pavement cutting work. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a flowchart of a sludge recovery method according to an embodiment of the present invention. [Figure 2] 10A to 10C are diagrams illustrating a tank installation process according to an embodiment of the present invention. [Figure 3] FIG. 2 is a diagram illustrating an installation location of a storage tank according to an embodiment of the present invention. [Figure 4] FIG. 2 is a diagram illustrating a sludge storage process and the like according to an embodiment of the present invention. [Figure 5] 1A to 1C are diagrams illustrating a road surface cutting process according to an embodiment of the present invention. [Figure 6] FIG. 2 is a diagram illustrating a sludge recovery process according to an embodiment of the present invention. [Figure 7] FIG. 2 is a diagram illustrating a sludge treatment process according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] The sludge collection method, sludge collection system, and pavement cutting method according to the present invention will be described below with reference to the accompanying drawings. Note that the following embodiments are merely examples of the present invention, and the present invention is not limited to the following embodiments.

[0028] As shown in FIG. 1, the sludge recovery method of the present invention includes a tank installation step S11, a sludge storage step S12, and a sludge recovery step S13.

[0029] As shown in FIG. 2, the tank installation step S11 is a step of installing the storage tank 1. The storage tank 1 is installed near the pavement surface P that is the target of the cutting work, at a position lower than the pavement surface P. In particular, it is preferable that the storage tank 1 be installed in a manhole M near the paved surface P.

[0030] As the storage tank 1, any tank that can be installed in a manhole M around the work site can be used.

[0031] FIG. 3 is a diagram illustrating an example of a manhole M in which the storage tank 1 is preferably installed. A manhole is a general term for a rectangular or cylindrical artificial structure that has the function of collecting sewage, rainwater, mud, etc.

[0032] For example, Figure 3(A) shows a collection pit MW and a connecting pit MC that are already installed in street drains (side gutters) along the road.

[0033] As shown in the cross-sectional view of the area around the manhole M in Figure 3(B), such a manhole M is installed at a lower position than its surroundings and has a certain depth so that it can draw in and store flow F of rainwater, mud, etc.

[0034] That is, by installing the storage tank 1 in an existing manhole M or the like, the sludge S generated by cutting the pavement surface P also becomes more likely to flow into the storage tank 1, improving the efficiency of the entire sludge collection work.

[0035] Although street drainage manholes such as catchment manholes MW and connecting manholes MC have been used as examples here, other manholes such as rainwater manholes, public manholes, sewage manholes, etc. can also be used as manholes in the broad sense in the sludge recovery method of the present invention.

[0036] Figure 4(A) shows the generation of sludge S due to cutting of the pavement surface P, and Figure 4(B) shows the sludge storage process S12 in which the generated sludge S is flowed into a storage tank 1 and stored therein.

[0037] As shown in Figure 4(A), a wet cutting machine C cuts the pavement surface P while spraying water W, which can suppress the scattering of dust, including cutting chips, but also generates sludge S, which is a mixture of dust and water W.

[0038] This type of sludge S is treated as industrial waste and is prohibited from being discharged into the sewer. Therefore, in the past, the flow had to be blocked just before the manhole M, and the sludge had to be collected each time while the cutting work was being carried out, which increased the number of times the system was operated.

[0039] Therefore, in the present invention, as shown in Figure 4(B), sludge S is stored in a storage tank 1 installed in a manhole M (sludge storage process S12), and the sludge S is recovered when a certain amount or more of sludge S has been stored in the storage tank 1 (described later).

[0040] By using this method, sludge S is prevented from flowing into the manhole M, and the number of operations required for sludge recovery can be reduced.

[0041] Furthermore, as shown in Figure 5, by using a wet cutting machine C equipped with a sludge collection function, the cutting machine C can collect the sludge S in parallel with the cutting work, and the sludge S can be flowed into the storage tank 1 using the pipe body 3 and stored therein (a sludge storage process S12 is included).

[0042] Any pipe can be used as the pipe 3 as long as it connects the outlet of the cutting machine C with the inside of the storage tank 1, but it is preferable to use a flexible hose made of resin or rubber.

[0043] As shown in FIG. 6, the sludge S stored in the storage tank 1 is collected from the storage tank 1 into the collection tank 2 using the pipe body 3 and the pressure reducer 4 (sludge collection step S13). Furthermore, a sludge recovery system X is configured from at least the storage tank 1, the recovery tank 2, the pipe body 3, and the pressure reducer 4.

[0044] A double-ended polyethylene tank or the like is preferably used as the collection tank 2, and a rechargeable handheld vacuum cleaner or the like is preferably used as the pressure reducer 4. Note that a pump with a pressure reducing function or a blower that can switch between suction and discharge functions may also be used as the pressure reducer 4.

[0045] That is, the sludge recovery process S13 is a process in which the sludge S stored in the storage tank 1 is sucked up and recovered into the recovery tank 2 by lowering (reducing the pressure) inside the recovery tank 2 using the pressure reducer 4 (via the pipe body 3).

[0046] Furthermore, the sludge collection method of the present invention may further include a sludge discharge step S14 and a sludge treatment step S15 shown in FIG. 7 after the sludge collection step S13.

[0047] As shown in Figure 7, after the recovery tank 2 is transported near the treatment tank 6 loaded on the work vehicle T, the sludge S recovered in the recovery tank 2 is discharged from the recovery tank 2 to the treatment tank 6 using a pipe body 3 and a pressurizer 5.

[0048] In addition, a pump or blower with a pressurizing function may be used as the pressurizer 5, and in the case of a blower, if it is capable of switching between suction and discharge functions, it can also be used as the pressure reducer 4 in the sludge recovery process S13.

[0049] That is, the sludge discharge step S14 is a step in which the pressure in the recovery tank 2 is increased (pressurized) by the pressurizer 5 (via the pipe body 3), thereby pushing out the sludge S in the recovery tank 2 into the treatment tank 6 and discharging it.

[0050] The treatment tank 6 can perform dehydration treatment etc. on the sludge S in the tank. This allows the sludge S to be separated into dust, soil, sand, etc. and water at the work site, and the separated water can be reused for watering the cutting machine C, etc., further improving work efficiency.

[0051] According to this embodiment, by including a tank installation process S11 in which a storage tank 1 is installed, a sludge storage process S12 in which sludge S is flowed into the storage tank 1 and stored therein, and a sludge recovery process S13 in which the sludge S stored in the storage tank 1 is recovered into a recovery tank 2, the number of sludge recovery operations can be reduced, and the sludge recovery operations can be performed efficiently.

[0052] Furthermore, in the tank installation step S11, the storage tank 1 is installed at a position lower than the paved surface, which makes it easier to collect the sludge S in the storage tank 1, further improving the efficiency of the work.

[0053] Furthermore, in the tank installation process S11, by installing the storage tank 1 in the manhole M, sludge can be collected using existing manholes M such as the collection manhole MW, connecting manhole MC, and other manholes, making it possible to collect sludge more efficiently.

[0054] Furthermore, in the sludge recovery process S13, the pressure inside the recovery tank 2 is reduced, and the sludge S stored in the storage tank 1 is sucked up and recovered into the recovery tank 2, making it relatively easy to recover sludge from the storage tank 1, which is installed at a low position, to the recovery tank 2, which is installed at a high position, further improving the work efficiency of the entire sludge recovery operation.

[0055] Furthermore, by further including a sludge discharge step S14 in which the sludge S in the recovery tank 2 is discharged into the treatment tank 6 after the sludge collection step S13, and a sludge treatment step S15 in which the sludge S is treated in the treatment tank 6, sludge collection and treatment can be completed efficiently at the work site.

[0056] Furthermore, in the sludge discharge step S14, by pressurizing the inside of the recovery tank 2, the sludge S in the recovery tank 2 is pushed out and discharged into the treatment tank 6, which makes it relatively easy to discharge the sludge from the recovery tank 2 to the treatment tank 6, further improving the overall work efficiency.

[0057] Furthermore, the sludge recovery method shown in this embodiment can be realized by a sludge recovery system comprising a storage tank 1, a recovery tank 2, a pipe body 3, and a pressure reducer 4, to which a pressure reducer 5 and a treatment tank 6 are added.

[0058] It should be noted that the configurations and functions shown in the above embodiments are merely examples and can be modified in various ways based on design requirements and the like. [Explanation of symbols]

[0059] 1. Storage tank 2. Recovery tank 3. Body 4. Pressure reducer 5. Pressure machine 6. Treatment Tank P Paved surface M Square C cutting machine W water S sludge

Claims

1. A method for collecting sludge containing dust and water generated by cutting a pavement surface, comprising: a tank installation step of installing a storage tank at a position lower than the pavement surface; a sludge storage step of causing the sludge to flow into the storage tank and store it therein; a sludge recovery step of recovering the sludge stored in the storage tank into a recovery tank; A sludge recovery method comprising:

2. The sludge recovery method according to claim 1 , wherein in the tank installation step, the storage tank is installed in a manhole.

3. The sludge recovery method according to claim 1 , wherein in the sludge recovery step, the sludge stored in the storage tank is sucked up and recovered into the recovery tank by reducing the pressure inside the recovery tank.

4. The sludge recovery method according to any one of claims 1 to 3, further comprising, after the sludge recovery step, a sludge discharge step of discharging the sludge in the recovery tank into a treatment tank, and a sludge treatment step of treating the sludge in the treatment tank.

5. 5. The sludge recovery method according to claim 4, wherein in the sludge discharge step, the sludge in the recovery tank is pushed out and discharged into the treatment tank by pressurizing the inside of the recovery tank.

6. A sludge collection system for collecting sludge containing dust and water generated by cutting a pavement surface, comprising: The system comprises a storage tank installed at a position lower than the pavement surface and into which the sludge flows, a recovery tank, a pipe body, and a pressure reducer, the pipe connects the storage tank and the recovery tank; The pressure reducer reduces the pressure in the recovery tank, thereby sucking the sludge stored in the storage tank through the pipe body into the recovery tank and recovering it.

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