Wet type selection system and wet type selection method

Abstract

To provide a wet type selection system and a wet type selection method enabling stable selection by a difference in size even when a light waste such as one floating in water is considerably wet.SOLUTION: A wet type selection system 100 includes: a selection water tank 102 to which a waste HK is input; and a vibration screening machine 104 that receives a selection object SB flowed from the selection water tank 102 and screens the selection object SB for each size. The vibration screening machine 104 includes: a screen 110 that has a form of being inclined downward from the selection water tank side end portion and configured to vibrate; a first container 122 arranged right below the screen 110 and storing a first selection object FS screened and dropped by the screen 110; and a second container 124 that stores a second selection object SS that passes the vibration screening machine 104 without being screened and dropped by the screen 110. The wet type selection system 100 further includes one or more sprinklers 126 including a sprinkler nozzle 126A capable of sprinkling water at a predetermined position of the screen 110.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wet sorting system and a wet sorting method. [Background technology]

[0002] Patent Document 1 discloses a process in which waste is separated into aggregate and soil and sand using a vibrating screen, and the aggregate is then poured into a water tank to wash the aggregate and remove floating matter. By using this process, Patent Document 1 aims to efficiently recycle the aggregate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3052126 Summary of the Invention [Problem to be solved by the invention]

[0004] However, according to Reference 1, it is extremely difficult to separate floating matter that floats on water by size. Therefore, it is possible to further separate only the floating matter using a vibrating sieve, but the floating matter is light (and in some cases extremely small), so there is a possibility that the vibrating sieve will become clogged.

[0005] Similarly, the waste material fed into the vibrating sieve is often quite wet, which can also cause the vibrating sieve to become clogged.

[0006] Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a wet sorting system and a wet sorting method that can stably sort light waste that floats on water even when the waste is relatively wet and has different sizes. [Means for solving the problem]

[0007] The present invention solves the above-mentioned problem by providing a wet sorting system comprising a sorting tank into which waste is fed, and a vibrating sieve machine that receives the sorted material flowing out of the sorting tank and sifts it by size, wherein the vibrating sieve machine comprises a vibrating screen that slopes downward from the side end of the sorting tank, a first container positioned directly below the screen and that stores the first sorted material that is sieved out by the screen, and a second container that stores the second sorted material that is not sieved out by the screen and passes through the vibrating sieve machine, and by providing one or more sprinklers that have sprinkler nozzles that can spray water at specified locations on the screen.

[0008] The present invention includes a sorting tank into which waste is introduced and a vibrating sieve that receives the waste flowing out of the sorting tank and sifts it by size, allowing for stable sorting regardless of the wetness of the waste.

[0009] The vibrating sieve machine is equipped with a vibrating screen that slopes downward from the end of the sorting tank, making it easy to move the sorted material. Furthermore, it is equipped with one or more sprinklers equipped with sprinkler nozzles that can sprinkle water at specific locations on the screen, so that clogged areas on the screen can be sprinkled with water, making it easy to clear the clogging. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a wet sorting system and a wet sorting method that can stably sort out different sizes of light waste that floats on water even when the waste is fairly wet. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a top view schematic diagram illustrating an example of a wet sorting system according to a first embodiment of the present invention. [Figure 2] Figure 1: Schematic side view of the wet sorting system [Figure 3] Schematic diagram showing the water spraying onto the screen by the sprinkler in Figure 1 ((A) shows the water spray trajectory, and (B) shows the water spray vector). [Figure 4] Flow diagram showing the wet sorting procedure using the wet sorting system in Figure 1 DETAILED DESCRIPTION OF THE INVENTION

[0012] An example of a first embodiment of the present invention will be described in detail below with reference to the drawings.

[0013] First, the configuration of a wet sorting system 100 according to this embodiment will be described with reference to FIG.

[0014] 1, the wet sorting system 100 includes a sorting tank 102 into which waste HK is introduced, and a vibrating sieve 104 that receives sorted material (floating matter) SB flowing out of the sorting tank 102 and sifts it by size. The wet sorting system 100 further includes one or more (four in this embodiment) sprinklers 126, a work machine BK, and a waste storage area HS.

[0015] Here, waste HK collectively refers to demolition debris from demolished buildings and construction waste from buildings destroyed by disasters. Waste HK is, for example, small pieces of building waste, including concrete debris, steel pieces, wood chips, and foam used as insulation. Because concrete debris and steel components are heavy, they sink in the sorting tank 102. However, foam alone, concrete debris, steel pieces, and wood chips sometimes combined with foam, may float in the sorting tank 102 and become the floating matter (sorted matter SB). The sorted matter SB that is sieved out by the vibrating sieve 104 is referred to as the first sorted matter FS, and the remaining sorted matter SB is referred to as the second sorted matter SS. In recent years, the number of highly insulated buildings has increased, resulting in an increase in foam integrated with concrete and other waste HK.

[0016] Next, the wet sorting system 100 will be described in detail.

[0017] As shown in Figures 1 and 2, the sorting tank 102 is a waterproof and rustproof steel tank (e.g., with a capacity of 20 cubic meters and a height of approximately 3 m). The upper end of the sorting tank 102 on the vibrating sieve side is provided with an extension 102A, which is an inclined channel for guiding overflowing water and floating matter to the screen 110 of the vibrating sieve 104. Although not shown, a faucet is provided at the upper end of the sorting tank 102 on the counter-vibrating sieve side so that new water can be supplied as needed. A hose HR connected to a submersible pump WP of the first container 122, which will be described later, is also provided at the upper end of the sorting tank 102 on the counter-vibrating sieve side. Therefore, overflowing water and floating matter from the sorting tank 102 are moved toward the vibrating sieve 104 in the +X direction. The sorting water tank 102, together with the work machine BK and the waste storage site HS, is placed at a height (for example, about 2 m) that is the height of the mound MD from the ground level GD.

[0018] As shown in Figures 1 and 2, the vibrating sieve machine 104 comprises a frame stand 106, a sieve body 108, a screen 110, a spring support 112, a vibrator 114, a belt 116, a rotary motor 118, a chute 120, a first container 122, and a second container 124.

[0019] As shown in Figures 1 and 2, the frame stand 106 comprises four pillars 106A fixed to the ground GD and a frame 106B supported on the pillars and inclined downward from the end of the sorting tank. A first container 122 and a second container 124 are movably arranged between the four pillars 106A and below the frame 106B. The first container 122 is arranged directly below the sieve body 108 and collects the first sorted material FS that has been sieved out by the screen 110. Four spring supports 112 are attached to the frame 106B, and the spring supports 112 support the sieve body 108 in a vibratory manner.

[0020] 1 and 2, the sieve body 108 has a rectangular shape and supports a screen 110 inside. The screen 110 is, for example, a punched metal (which may have round holes, hexagonal holes, or elongated holes) of less than 10 mm square, and is made of stainless steel or the like (note that the screen is not limited to this, and may be a woven mesh such as a plain weave or flat-top weave, a rubber mesh, grease sleeves, or a comb tooth mesh. For example, when using a woven mesh, a ton-cap weave or a tie-rod weave may be used). In addition, a chute 120 is connected to the end of the sieve body 108 opposite the sorting tank side, and the chute 120 drops the second sorted material SS that has not been sieved out by the screen 110 into a second container 124 (i.e., the vibrating sieve machine 104 is configured to include a vibrating screen 110 that slopes downward from the end of the sorting tank side, a first container 122 that is positioned directly below the screen 110 and stores the first sorted material FS that has been sieved out by the screen 110, and a second container 124 that stores the second sorted material SS that has not been sieved out by the screen 110 and passes through the vibrating sieve machine 104).

[0021] As shown in Figures 1 and 2, the first container 122 and the second container 124 are the same size (e.g., capacity of 10 cubic meters or less) and are waterproof and rustproof. However, the first container 122 is provided with a submersible pump WP, which automatically supplies water via a hose HR to the anti-vibration sieve side end of the sorting tank 102 when a certain amount of water accumulates in the first container 122. A vibrator 114 is rotatably mounted on the sieve body 108. The vibrator 114 has a weight that is unevenly distributed in the circumferential direction, and is capable of vibrating the sieve body 108 by rotating. A belt 116 is attached to the vibrator 114, and the vibrator 114 is rotated by a rotary motor 118 attached to the frame portion 106B.

[0022] As shown in FIG. 1 , the sprinklers 126 are arranged in pairs on the frame portion 106B of the vibrating sieve machine 104, at the end of the sorting water tank and in the center of the frame portion 106B, with the sieve body 108 sandwiched between them (the sprinklers may be attached to the sieve body). That is, the sprinklers 126 are arranged in pairs at the same height, sandwiching the screen 110 between them. Each sprinkler 126 is equipped with a sprinkler nozzle 126A that can be tilted vertically and rotated horizontally. The orientation of each sprinkler nozzle 126A can be controlled independently, and each sprinkler nozzle 126A can sprinkle water at a predetermined location on the screen 110. The orientation of the sprinkler nozzle 126A can be manually adjusted using a remote control (not shown) to turn the sprinkler 126 on and off. At the same time, it is also possible to use a remote control (not shown) to automatically change the direction of sprinkler nozzle 126A in sprinkler device 126, thereby repeatedly sprinkling water in a specific range.

[0023] In this embodiment, each sprinkler 126 is capable of automatically sprinkling water over the entire surface of the screen 110 at predetermined intervals, as shown in FIG. 3(A) by the trajectory TC of the water spray when sprinkling water on the screen 110. Paired sprinklers 126 are configured to spray water at the same time and at the same location on the screen 110. For example, as shown in FIG. 3(B), by simultaneously spraying water on clogging items SB from the paired sprinklers 126, the spray vector Fa (or Fb) generated by only one of the sprinklers applies a force of resultant vector Ft to the items SB that may be blown in the Y direction. This effectively eliminates clogging, reduces the possibility of being blown in the Y direction, and further facilitates the transport of the items SB.

[0024] In this embodiment, the orientation of the sprinkler 126 disposed at the center of the frame portion 106B shown in Figures 1 and 2 is controlled so that a +X direction component remains in its own sprinkler nozzle 126A. In other words, the sprinkler 126 is always forced in the transport direction (+X direction) when spraying water. Although not shown, each sprinkler 126 is provided with an on-off valve, which can also be controlled independently.

[0025] 1, the work machine (backhoe) BK is equipped with a rotatable main body HB with endless tracks MK, an arm body AM swingably supported on the main body HB, and a work attachment SA swingably supported on the arm body AM. The work attachment SA is, for example, a grapple that can grasp waste HK by bringing a pair of fork members close together, and after throwing the waste HK into the sorting tub 102, it can swing the work attachment SA in the sorting tub 102 while grasping all or part of the waste HK (in other words, the work machine BK is configured to include the work attachment SA that throws the waste HK into the sorting tub 102 and can change the position and shape of the waste HK within the sorting tub 102, and the arm body AM that swingably supports the work attachment SA).

[0026] As shown in Figure 1, the waste storage site HS is provided adjacent to the work machine BK and is designed to receive waste HK that is transported by a trailer or the like. Note that the waste storage site HS is not necessarily required and may be the trailer itself, for example.

[0027] Next, using Figure 4, we will explain the steps of the wet sorting method in which waste HK is put into the sorting tank 102, the sorted material SB flowing out of the sorting tank 102 is received, and the sorted material SB is sieved by size using a vibrating screen 110.

[0028] First, the work machine BK throws the waste HK from the waste storage area HS into the sorting tank 102 (FIG. 4, step S2). Then, in the sorting tank 102, the work attachment SA grasps some or all of the waste HK and moves, deforms, and decomposes it.

[0029] Then, the lighter waste HK becomes floating matter (sorted matter SB), and the sorted matter SB is thrown from the extension part 102A of the sorting tank 102 into a vibrating screen 110 that has a downwardly inclined shape from the side end of the sorting tank (Figure 4, step S4).

[0030] At this time, the sprinkler 126 sprinkles water at predetermined locations on the screen 110 (FIG. 4, step S6). Specifically, the sprinkler 126 continues to automatically sprinkle water over the entire surface of the screen 110 at regular intervals, for example, by repeatedly scanning the trajectory TC shown in FIG. 3(A).

[0031] Then, in the part of the screen 110 where the sorted material SB is not clogging, the first sorted material FS is sieved out into the first container 122 and collected in the first container 122. By spraying water from at least two directions on the part of the screen 110 where the sorted material SB is clogging, the clogging is eliminated and the first sorted material FS is again sieved out into the first container 122. In either case, the first sorted material FS sieved out by the screen 110 is collected in the first container 122 directly below the screen 110 (Figure 4, step S8).

[0032] Then, the second sorted material SS, which is the sorted material that has not been sieved out by the vibrating sieve 104, is collected by the chute 120 into the second container 124 (FIG. 4, step S10).

[0033] As described above, this embodiment includes a sorting tank 102 into which waste HK is introduced, and a vibrating sieve 104 that receives the waste SB flowing out of the sorting tank 102 and sifts it by size. This allows for stable sorting regardless of the wetness of the waste HK. Furthermore, the vibrating sieve 104 includes a vibrating screen 110 that slopes downward from the end of the sorting tank, facilitating the movement of the waste SB in the conveying direction (+X direction). Furthermore, the vibrating sieve 104 includes one or more sprinklers 126 equipped with sprinkler nozzles 126A that can sprinkle water at predetermined locations on the screen 110. Therefore, water can be sprinkled at clogged locations on the screen 110, making it easy to clear the clogging.

[0034] Furthermore, in this embodiment, a work machine BK is provided which includes a work attachment SA that throws waste HK into the sorting tank 102 and allows the position and shape of the waste HK to be changed within the sorting tank 102, and an arm body AM that swingably supports the work attachment SA. This makes it possible to appropriately adjust the amount of waste HK thrown into the sorting tank 102, and to smoothly separate the waste HK into floating matter and sediment. However, this is not limiting, and a configuration in which the waste HK is thrown into the sorting tank all at once from a trailer may also be used.

[0035] Furthermore, in this embodiment, the first container 122 is provided with a submersible pump WP, which supplies water to the anti-vibration sieve side end of the sorting tank 102 when a certain amount of water accumulates in the first container 122. This allows the water used in the sorting tank 102 and the sprinkler 126 to be reused, making it possible to save the amount of water used in the wet sorting system 100. However, this is not limiting, and the first container may be provided with a water drain so that water does not accumulate in the first container.

[0036] Furthermore, in this embodiment, the sprinkler 126 is disposed at the end of the vibrating sieve machine 104 on the sorting water tank side. Therefore, even if clogging occurs, water is appropriately sprinkled in the conveying direction (+X direction) of the sorted material SB, so it is possible to quickly move the sorted material SB in the conveying direction while clearing the clogging. However, without being limited to this, the sprinkler may be disposed only in the center of the vibrating sieve machine or at the end opposite the sorting water tank side.

[0037] Furthermore, in this embodiment, the sprinkler 126 at the end of the sorting tank side is capable of automatically sprinkling water over the entire surface of the screen 110 at predetermined intervals. This makes it possible to unclog the screen 110 at regular intervals and promote smooth transport of the sorted material SB. However, this is not limited to this, and the sprinkler may be capable of automatically sprinkling water over the entire surface of the screen at predetermined intervals regardless of where it is placed. In fact, the sprinkler may be configured to sprinkle water over an area only when the operator of the sprinkler (which may be the operator of the work machine BK) notices that the sorted material SB is stuck on the screen or that it is clogged.

[0038] Furthermore, in this embodiment, the sprinklers 126 are arranged in pairs at the same height, sandwiching the screen 110 between them, and the pair of sprinklers 126 spray water at the same time at the same location on the screen 110. In other words, by simultaneously spraying water so as to sandwich the screen from two directions, it is possible to reduce the possibility that clogging sorted material SB will be blown out of the screen 110. However, this is not limiting, and two sprinklers may be provided, and the sprinklers may be at different heights, or may spray water at different locations on the screen. Of course, only one sprinkler may be used.

[0039] Therefore, according to this embodiment, it is possible to provide a wet sorting system and a wet sorting method that can stably sort light waste that floats on water, even if it is relatively wet, regardless of its size.

[0040] Although the present invention has been described using the first embodiment, the present invention is not limited to the first embodiment. In other words, it goes without saying that improvements and design changes are possible within the scope of the present invention.

[0041] For example, in the first embodiment, when the wet separation system 100 is installed in an area where waste HK needs to be treated, the sorting tank 102 and the vibrating screen machine 104 are transported on separate vehicles (in some cases, the frame stand 106 is disassembled into the pillar section 106A and the frame section 106B, and the first container 122 and the second container 124 are transported on separate vehicles) (i.e., the wet separation system 100 is designed to be vehicle-mountable), and the wet separation system 100 is assembled by building earth mounds in the required area, but the present invention is not limited to this. For example, in the second embodiment, instead of building earth mounds, recesses may be formed in the ground GD to accommodate the first and second containers, so that the height levels of the first and second containers are the same as the ground GD, and the pillar sections may be installed on the ground GD. In this case, the pillar sections can be shorter than in the first embodiment, the vibrating screen machine itself can be made more compact, and the number of components required to assemble the wet separation system can be reduced. For this reason, for example, a vibrating sieve, whose pillars and frame are integrated, can be mounted inside the container of a dedicated container truck with an arm-type detachable device, and when installing, the vibrating sieve can be placed directly on the ground GD using a crane or the like (note that the pillars may be adjustable to some extent). For this reason, in this embodiment, the wet sorting system can be quickly transported to and installed in areas where waste HK needs to be treated.

[0042] In the above embodiment, the sprinkler can directly control the direction of the sprinkler nozzles with a controller (not shown) and can automatically sprinkle water over a predetermined area of ​​the screen at regular intervals, but the present invention is not limited to this. The sprinkler itself may be provided with a visual sensor that can detect clogging of the screen or retention of sorted material on the screen and automatically sprinkle water over that area.

[0043] Furthermore, in the above embodiment, the work attachment SA is a grapple, but the present invention is not limited to this. For example, the work attachment SA may be a bucket or other device. The work machine BK is a backhoe in the above embodiment, but it may also be a crane, for example. [Industrial Applicability]

[0044] The present invention is suitable for sorting demolition waste materials generated from demolished buildings and construction waste generated from buildings that have collapsed due to disasters, etc. [Explanation of symbols]

[0045] 100...Wet sorting system 102...Sorting tank 102A...Extension part 104...Vibration sieve machine 106...Frame stand 106A…Column part 106B...Frame section 108...Sieve body 110...Screen 112...Spring support 114... Vibrational body 116...Belt 118...Rotary motor 120...Shooter 122...1st container 124...Second container 126...Sprinkler 126A...Watering nozzle AM: Arm body BK...Work machine Fa, Fb...watering vectors FS: First selection Ft...composite vector GD…Ground HB...Main unit HK…waste HR...Hose HS...waste dump MD...Embankment MK…Endless track SA...Work attachment SB: Selected items SS: Second selection TC…Trajectory WP...Submersible pump

Claims

1. A wet sorting system comprising a sorting tank into which waste is introduced, and a vibrating sieve that receives the waste flowing out of the sorting tank and sifts the waste by size, The vibrating sieve machine includes a vibrating screen that is inclined downward from the end of the sorting water tank side, a first container that is disposed directly below the screen and that stores first sorted materials that are sieved out by the screen, and a second container that stores second sorted materials that are not sieved out by the screen and that pass through the vibrating sieve machine, and further includes One or more sprinklers are provided with sprinkler nozzles that can sprinkle water at predetermined locations on the screen. A wet sorting system characterized by:

2. In claim 1, further comprising: The waste is introduced into the sorting tank, and the work machine includes a work attachment that can change the position and shape of the waste within the sorting tank, and an arm body that swingably supports the work attachment. A wet sorting system characterized by:

3. In claim 1, The first container is provided with a submersible pump, which supplies water to the anti-vibration sieve side end of the sorting tank when a certain amount of water accumulates in the first container. A wet sorting system characterized by:

4. In claim 1, The sprinkler is disposed at the end of the vibrating sieve on the sorting water tank side. A wet sorting system characterized by:

5. In claim 1, further comprising: The sprinkler is capable of sprinkling water over the entire surface of the screen at predetermined intervals. A wet sorting system characterized by:

6. In claim 5, The sprinklers are arranged in pairs at the same height across the screen, and water is sprayed from the pair of sprinklers to the same location on the screen at the same time. A wet sorting system characterized by:

7. In claim 1, The wet sorting system can be mounted on a vehicle. A wet sorting system characterized by:

8. A wet sorting method in which waste is put into a sorting tank, sorted material flowing out of the sorting tank is received, and the sorted material is sieved by size using a vibrating screen, A step of introducing the sorted material from the sorting tank into the vibrating screen having a downwardly inclined shape from a side end of the sorting tank; Spraying water onto a predetermined portion of the screen; collecting the first sorted material that is screened out by the screen directly below the screen; recovering a second fraction not filtered by the screen; Contains A wet sorting method characterized by:

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