Slurry treatment method

Abstract

To effectively treat slurry.SOLUTION: The slurry treatment method comprises a step of electrolyzing at least fluids in a slurry which is a mixture of the fluids and solids, and a step of performing at least a crushing and mixing treatment on the solids.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a method for processing a slurry. [Background technology]

[0002] Sediment flows into a dam reservoir from the upstream river and accumulates there, forming sediment (sediment), causing the reservoir's water capacity to decrease over time. In addition, upstream of the dam reservoir, the rising riverbed increases the risk of flooding, while downstream, a decrease in the amount of sediment supplied from the river causes problems such as lowering of the riverbed and receding coastlines. For this reason, sediments in the dam reservoir are discharged downstream, for example, through a sand-washing bypass tunnel or a sand-washing outlet (sand-washing gate) installed in the dam.

[0003] Conventionally, there has been known an apparatus for producing hydrogen from sewage sludge at an evacuation shelter using generated electricity (see, for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2021-190394 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, there has been no proposal so far regarding an efficient method for treating slurry, which is a mixture of liquid and deposits from a dam or the like.

[0006] In one aspect, the present invention aims to provide a method for treating a slurry, which can realize efficient treatment of the slurry. [Means for solving the problem]

[0007] In a first aspect, the slurry processing method includes an electrolysis step of electrolyzing at least the liquid in a slurry, which is a mixture of a solid and a liquid, and a processing step of performing at least one of crushing and mixing on the solid.

[0008] In a second aspect, the slurry treatment method includes an electrolysis step of electrolyzing a slurry, which is a mixture of a solid and a liquid, and a pressure filtration step of pressure filtering the electrolyzed slurry.

[0009] In a third aspect, a slurry treatment method includes a step of pressure filtering a slurry, which is a mixture of solids and liquids, and a step of electrolyzing the liquid of the pressure-filtered slurry. Effect of the Invention

[0010] The slurry can be efficiently processed. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a vertical cross-sectional view of a reservoir in which a sediment moving device is provided. [Diagram 2] FIG. 2(a) is a perspective view that shows a schematic diagram of the sediment moving device, and FIG. 2(b) is a perspective view that shows a state in which the net-like member has been removed from the sediment moving device. [Diagram 3] FIG. 3 is a plan view showing the deposit moving device as viewed from above (+Z direction). [Figure 4] FIG. 4 is a diagram showing an example in which a bellows-shaped member having projections and recesses formed along the X-axis direction is used as the deposit guide portion. [Diagram 5] FIG. 5 is a block diagram that illustrates a control system of the deposit moving device. [Figure 6] FIG. 6 is a flowchart showing the process performed by the control device. [Figure 7] FIG. 7 is a flowchart showing detailed processing of step S12 in FIG. [Figure 8] FIG. 8 is a flowchart showing detailed processing of step S16 in FIG. [Figure 9] FIG. 9 is a flowchart showing detailed processing of step S20 in FIG. [Figure 10] FIG. 10 is a diagram illustrating a schematic configuration of a processing system. [Figure 11] FIG. 11 is a diagram showing a schematic control system of the processing system. [Figure 12] FIG. 12 is a flowchart (part 1) showing the process of the central control device. [Figure 13] FIG. 13 is a flowchart (part 2) showing the processing of the central control device. [Figure 14] FIG. 14 is a flowchart (part 3) showing the process of the central control device. [Figure 15] FIG. 15 is a diagram showing a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, one embodiment will be described in detail with reference to FIGS.

[0013] (Regarding the deposit moving device 100) FIG. 1 is a vertical cross-sectional view of a reservoir 10 in which a sediment moving device 100 according to an embodiment is provided. The reservoir 10 is provided with a bank body 12. The bank body 12 is provided with a discharge channel 14 and a sand flushing channel 16. The discharge channel 14 is provided with a discharge gate 18 that can be opened and closed, and the sand flushing channel 16 is provided with a sand flushing gate 20 that can be opened and closed. The discharge gate 18 and the sand flushing gate 20 are controlled to be opened and closed by a dam control device 22. The dam control device 22 controls the opening and closing of the discharge gate 18 based on the amount of water stored in the reservoir and operation information by workers, etc. When the discharge gate 18 is in a closed state, the reservoir water is not discharged from the discharge channel 14, and when the discharge gate 18 is in an open state, the reservoir water is discharged from the discharge channel 14. The dam control device 22 also controls the opening and closing of the sand flushing gate 20 based on operation information from an operator, etc., and when the sand flushing gate 20 changes from a closed state to an open state, sand accumulated near the sand flushing channel 16 is discharged together with the dam lake water through the sand flushing channel 16 to the outside of the dam lake. In this embodiment, the left-right direction in the plane of Fig. 1 is the X-axis direction, the direction perpendicular to the plane of Fig. 1 is the Y-axis direction, and the up-down direction in the plane of Fig. 1 is the Z-axis direction. The direction of the arrow in the coordinate system in Fig. 1 is the + (plus) direction, and the opposite direction is the - (minus) direction.

[0014] A sediment moving device 100 is installed on the lake bottom of the dam lake 10, as shown by a dashed line in Fig. 1. The sediment moving device 100 is a device that moves sediments accumulated on the lake bottom of the dam lake 10 to the vicinity of the sand flushing channel 16 (sand flushing gate 20). The configuration of the sediment moving device 100 will be described in detail below.

[0015] Fig. 2(a) is a perspective view that typically shows the sediment moving device 100. Fig. 2(b) is a perspective view that typically shows the sediment moving device 100 with the mesh member 32 removed. Fig. 3 is a plan view that typically shows the sediment moving device 100 as viewed from above (+Z direction). In Fig. 3, the mesh member 32 is indicated by a dashed line for ease of illustration.

[0016] As shown in Figures 2(a) and 2(b), the sediment movement device 100 comprises a main body 30 provided on the bottom of the dam lake 10, a mesh member 32 provided above the main body 30, and a water intake pump 34 and a water discharge pump 36 connected to the main body 30.

[0017] The main body 30 has a deposit storage section 40 having a generally U-shaped cross section extending in the X-axis direction, and plate-shaped deposit inducers 42A and 42B provided at the upper end of the deposit storage section 40. The deposit inducers 42A and 42B have inclined surfaces inclined with respect to the XY plane. In this embodiment, the angle of the inclined surface of the deposit inducer 42A with respect to the XY plane and the angle of the inclined surface of the deposit inducer 42B with respect to the XY plane are substantially the same, but are not limited thereto. In order to facilitate the induction of deposits according to the shape of the dam, the angle of the inclined surface of the deposit inducer 42A with respect to the XY plane and the angle of the inclined surface of the deposit inducer 42B with respect to the XY plane may be different.

[0018] The sediment guide units 42A, 42B are flat plate-like members made of polyvinyl chloride, plastic, metal, etc. The sediment guide units 42A, 42B receive, on their inclined surfaces, objects (sediments) that flow into the dam lake 10 and pass through the mesh of the mesh member 32. The sediments on the inclined surfaces slide or roll down the inclined surfaces due to the sediments' own weight, and move (are guided) toward the sediment storage unit 40.

[0019] In addition, the deposit guide parts 42A, 42B are flat plate-shaped members in Fig. 2(a) and Fig. 2(b), but are not limited thereto. For example, as shown in Fig. 4, a bellows-shaped member having projections and recesses formed along the X-axis direction may be adopted as the deposit guide part 42A (42B). This reduces the contact area between the deposit on the deposit guide part 42A (42B) and the inclined surface of the deposit guide part 42A (42B), thereby reducing frictional resistance and making it easier for the deposit to slide down (or roll down) along the inclined surface. The bellows direction (the direction in which the projections and recesses are arranged) may be a direction other than the X-axis direction. When a bellows-shaped member is adopted as the deposit guide parts 42A, 42B, the bellows-shaped member may be a flat plate-shaped member machined to deform it into a bellows shape, or may be a combination of a plurality of strip-shaped members assembled together, and may be appropriately selected in consideration of manufacturing cost, weight, transportability, storability, and the like. The deposit guide portion 42A (42B) may be a plate-like member having a large number of projections formed on its surface.

[0020] As shown in Fig. 2(b) and Fig. 3, the sediment guide unit 42A is supported by support columns 46A and 46B installed on the bottom of the dam lake 10 via wires 44A and 44B. The sediment guide unit 42B is supported by support columns 46C and 46D installed on the bottom of the dam lake 10 via wires 44C and 44D. A first tension measuring device 48A for measuring the tension of the wire 44A and a first vibration device 50A for vibrating the sediment guide unit 42A via the wire 44A are provided between the wires 44A and the support column 46A. Similarly, first tension measuring devices 48B to 48D and first vibration devices 50B to 50D are provided between the wires 44B to 44D and the support columns 46B to 46D.

[0021] The first tension measuring devices 48A and 48B measure the tension applied to the wires 44A and 44B, thereby indirectly measuring the weight of the deposits accumulated in the deposit guide section 42A. The first tension measuring devices 48C and 48D measure the tension applied to the wires 44C and 44D, thereby indirectly measuring the weight of the deposits accumulated in the deposit guide section 42B. The measurement results of the first tension measuring devices 48B to 48D are transmitted to the control device 90 (see FIG. 5).

[0022] The first vibration devices 50A, 50B vibrate the deposit guide portion 42A via the wires 44A, 44B, and promote the movement of deposits along the inclined surface of the deposit guide portion 42A. The first vibration devices 50C, 50D vibrate the deposit guide portion 42B via the wires 44C, 44D, and promote the movement of deposits along the inclined surface of the deposit guide portion 42B. The control device 90 controls the magnitude of vibration generated by the first vibration devices 50A-50D and the vibration time based on the measurement results of the first tension measuring devices 48A-48D. Note that there is no contact between the deposit storage portion 40 and the deposit guide portions 42A, 42B. Therefore, the vibration of the deposit guide portions 42A, 42B is not transmitted to the deposit storage portion 40. However, this is not limited to the above, and the deposit guide portions 42A, 42B and the deposit storage portion 40 may be fixed, and the main body portion 30 may vibrate integrally. The vibration direction of the first vibrating devices 50A to 50D is, for example, the Z-axis direction, but is not limited thereto, and the vibration direction of the first vibrating devices 50A to 50D may be a direction other than the Z-axis direction.

[0023] The sediment storage unit 40 is provided in a predetermined region of the main body 30 (in this embodiment, the center and lower end in the Y-axis direction). The sediment storage unit 40 is made of metal, concrete, or other materials and is capable of storing a certain amount of sediment. The -X side end of the sediment storage unit 40 is located near the sand flushing channel 16 (sand flushing gate 20) in FIG. 1 and is installed on the lake bottom of the dam lake 10. In FIG. 2, the shape of the top surface of the sediment storage unit 40 is flat, but it may be bellows-shaped as described above, and may be inclined in the X or Y direction to make it easier to move the sediments.

[0024] A weight measuring device 52 for measuring the weight of the sediment contained in the sediment containment unit 40 is provided on the upper surface of the sediment containment unit 40 or on the lower surface of the sediment containment unit 40 (between the upper surface and the bottom of the dam lake 10) (see the areas shaded in gray in FIG. 3). The measurement results of the weight measuring device 52 are transmitted to the control device 90 (FIG. 5).

[0025] The mesh member 32 is installed above the main body 30, and covers the entire main body 30. The mesh member 32 is for sifting the sediments flowing into the dam lake 10 into objects larger than the mesh (such as gravel and driftwood) and objects smaller than the mesh (such as gravel and sand), and sending the objects smaller than the mesh to the main body 30. The mesh member 32 is made of materials such as metal, nonwoven fabric, and polyethylene. The size of the mesh of the mesh member 32 can be changed as appropriate depending on the particle size of the objects (such as gravel and sand) to be sent to the main body 30.

[0026] The four corners of the mesh member 32 are connected to the four support columns 46A to 46D, respectively. Second tension measuring devices 54A to 54D and second vibrating devices 56A to 56D are provided between the four corners of the mesh member 32 and the four support columns 46A to 46D.

[0027] The second tension measuring devices 54A-54D measure the tension applied to the mesh member 32, and thereby indirectly measure the weight of gravel, driftwood, and the like accumulated on the mesh member 32. The measurement results of the second tension measuring devices 54A-54D are transmitted to the control device 90 (FIG. 5).

[0028] The second vibrating devices 56A-56D vibrate the mesh member 32 to promote screening by the mesh member 32. In addition, the vibration can peel off sand adhering to gravel on the mesh member 32 and crush lumps of soil. The control device 90 controls the magnitude of vibration generated by the second vibrating devices 56A-56D and the vibration time based on the measurement results of the second tension measuring devices 54A-54D. The vibration direction of the second vibrating devices 56A-56D is, for example, the Z-axis direction. However, the vibration direction of the second vibrating devices 56A-56D is not limited to this, and may be a direction other than the Z-axis direction.

[0029] The water intake pump 34 and the water discharge pump 36 are connected, and the water intake pump 34 sucks in the surrounding water (and surrounding sediments) and discharges the water (and sediments) from the water discharge pump 36 to the sediment storage unit 40. The direction in which the water (and sediments) is discharged by the water discharge pump 36 proceeds from the +X direction to the -X direction. By tapering the tip of the intake port of the water intake pump 34, the sucked water (and sediments) can be compressed and the energy when it is discharged from the water discharge pump 36 can be increased. This makes it easier to transport the sediments present in the sediment storage unit 40 in the -X direction. The control device 90 controls the water intake pump 34 and the water discharge pump 36 based on the measurement results by the weight measuring device 52. In this embodiment, the water intake pump 34 and the water discharge pump 36 function as an external force applying device that applies an external force to the sediments in the sediment storage unit 40.

[0030] FIG. 5 is a block diagram showing a schematic control system of the sediment moving device 100. As shown in FIG. 5, the sediment moving device 100 has a control device 90. The control device 90 has a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The first tension measuring devices 48A-48D, the first vibration devices 50A-50D, the second tension measuring devices 54A-54D, the second vibration devices 56A-56D, the weight measuring device 52, the suction pump 34, and the discharge pump 36 are connected to the control device 90. In addition, a communication device 92 is connected to the control device 90. The communication device 92 communicates with the dam control device 22 in FIG. 1 to obtain opening and closing information of the sand discharge gate 20. In addition, the communication device 92 is capable of communicating with a crane and a crane vehicle, which will be described later.

[0031] (Regarding control of the deposit moving device 100 by the control device 90) Next, a method for controlling the deposit moving device 100 by the control device 90 will be described with reference to the flowcharts of Figures 6 to 9. Figure 6 is a flowchart showing the processing by the control device 90, and Figures 7 to 9 are flowcharts showing detailed processing of steps S12, S16, and S20 in Figure 6.

[0032] When the process of FIG. 6 is started, first, in step S10, the control device 90 refers to the measurement values ​​of the second tension measuring devices 54A-54D to determine whether the weight of the deposit on the net member 32 is equal to or greater than a first weight. The first weight is determined based on the size and material of the net member 32, the load capacity of the support columns 46A-46D, and the load capacity of the crane and crane truck described below, and is assumed to be, for example, 2000 kg (2 t). The control device 90 holds tables and relational expressions showing the relationship between the measurement values ​​of the second tension measuring devices 54A-54D and the weight of the deposit on the net member 32, and uses these tables and relational expressions in the above determination. If the determination in step S10 is positive, the process proceeds to step S12.

[0033] When the process proceeds to step S12, the control device 90 executes a process to collect the sediments on the mesh member 32. If sediments accumulate on the mesh member 32, they will prevent the sediments flowing into the dam lake 10 from moving onto the main body 30, so the sediments are to be collected when the amount of sediments on the mesh member 32 reaches a predetermined amount or more. In this step S12, a process is executed according to the flowchart of FIG.

[0034] (Processing of step S12) When the process of step S12 in FIG. 7 is started, first, in step S122, the control device 90 controls the second vibration devices 56A-56D for a predetermined time to vibrate the mesh member 32. This vibration of the mesh member 32 can peel off sand attached to gravel and driftwood larger than the mesh on the mesh member 32, crush clumps of soil, and move as many gravel and sand smaller than the mesh onto the main body 30 as possible. The predetermined time can be determined based on the results of a simulation performed in advance or the results of observing the state around the mesh member 32 that has been actually vibrated over time. The control device 90 may increase or decrease the vibration frequency and vibration time of the second vibration devices 56A-56D depending on the weight of the deposit on the mesh member 32.

[0035] Next, in step S124, the control device 90 instructs a crane installed near the dam lake 10 or a crane truck parked near the dam lake 10 to lift and unload the mesh member 32 via the communication device 92. When the worker confirms the instruction, he operates the crane or crane truck to perform the work of lifting the mesh member 32 from inside the dam lake 10. Note that, before lifting the mesh member 32, the worker removes the mesh member 32 from the support columns 46A to 46D. The worker unloads gravel, driftwood, and the like from the lifted mesh member 32, and returns the mesh member 32 to inside the dam lake 10. When the worker completes these operations, he transmits recovery work completion information to the control device 90 from the crane or crane truck.

[0036] In addition, when an automatic recovery device (including a winch, etc.) that automatically lifts and unloads the net member 32 is provided separately, the control device 90 issues instructions to the automatic recovery device to lift and unload the net member 32. In response to these instructions, the automatic recovery device recovers gravel, driftwood, etc. from the net member 32, and when recovery is completed, transmits recovery work completion information to the control device 90.

[0037] Next, in step S126, the control device 90 judges whether or not the collection operation completion information has been received. While the judgment in this step S126 is negative, the judgment in step S126 is repeated. On the other hand, if the judgment in step S126 is positive, the entire process in FIG. 7 is terminated, and the process returns to step S10 in FIG. 6.

[0038] Returning to FIG. 6, if the determination in step S10 is negative (if not much deposit has accumulated on the mesh member 32), the control device 90 proceeds to step S14.

[0039] When the process proceeds to step S14, the control device 90 refers to the measurement value of the weight measuring device 52 and judges whether the weight of the deposit in the deposit storage section 40 is equal to or greater than the second weight. The second weight may be, for example, 10,000 kg (10 t), but the value of the second weight may be changed appropriately taking into account the capacity of the deposit storage section 40. The control device 90 holds tables, relational expressions, etc. that show the relationship between the measurement value of the weight measuring device 52 and the weight of the deposit stored in the deposit storage section 40, and these tables, relational expressions, etc. are used in the above judgment. If the judgment in this step S14 is positive, the process proceeds to step S16.

[0040] In step S16, the control device 90 controls the suction pump 34 and the discharge pump 36 to apply an external force to the sediment stored in the sediment storage unit 40 to blow it away. When a certain amount of sediment has accumulated in the sediment storage unit 40, the sediment can be moved to the vicinity of the sand flushing channel 16 to reduce the number of times the sediment needs to be moved, thereby improving work efficiency. In step S16, the process follows the flowchart in FIG. 8.

[0041] (Processing of step S16) 8 is started, first, in step S162, the control device 90 operates the water intake pump 34 and the water discharge pump 36. As a result, the water intake pump 34 sucks in surrounding water and sediments, and the water discharge pump 36 ejects water and sediments in the -X direction, generating a water flow in the -X direction in the sediment storage unit 40. The sediments in the sediment storage unit 40 start to move in the -X direction due to the external force of this water flow, and gather near the sand discharge channel 16.

[0042] After step S162, in step S164, the control device 90 waits until a predetermined time has elapsed. The predetermined time is, for example, one minute. After the predetermined time has elapsed, the control device 90 proceeds to step S166.

[0043] When the process proceeds to step S166, the control device 90 stops the water intake pump 34 and the water discharge pump 36. After that, the process returns to step S14 in Fig. 6. The control device 90 may appropriately change the speed (magnitude of the external force) of the water and sediments ejected from the water discharge pump 36 and the above-mentioned predetermined time period depending on the weight of the sediments in the sediment storage unit 40.

[0044] Instead of step S164, the control device 90 may monitor the measurement value of the weight measuring device 52 and determine whether the measurement value is smaller than a predetermined value. In this case, the process proceeds to step S166 when the amount of deposits in the deposit storage unit 40 becomes small.

[0045] Returning to FIG. 6, if the determination in step S14 is negative, the process proceeds to step S18, where the control device 90 refers to the first tension measuring devices 48A-48D and determines whether the weight of the deposit deposited on the deposit guides 42A, 42B is equal to or greater than a third weight. The third weight is assumed to be, for example, 1000 kg (1 t). The control device 90 holds tables, relational expressions, etc. that indicate the relationship between the measurement values ​​of the first tension measuring devices 48A-48D and the weight of the deposit present on the deposit guides 42A, 42B, and uses these tables, relational expressions, etc. in the above determination. If the determination in step S18 is positive, the process proceeds to step S20.

[0046] In step S20, the control device 90 executes a process of moving the deposit by vibrating the deposit guiders 42A, 42B. If the deposit of a third weight or more has accumulated on the deposit guiders 42A, 42B, it is highly likely that the deposit is caught on a part of the deposit guiders 42A, 42B, making it difficult for the deposit to be guided to the deposit storage unit 40. Therefore, the control device 90 vibrates the deposit guiders 42A, 42B to forcibly guide the deposit caught on a part of the deposit guiders 42A, 42B to the deposit storage unit 40. In step S20, a process is executed according to the flowchart of FIG. 9.

[0047] (Processing of step S20) When the process of step S20 in Fig. 9 is started, first, in step S202, the control device 90 determines the vibration frequencies of the second vibrating devices 56A-56D based on the measurement values ​​of the second tension measuring devices 54A-54D. The control device 90 holds tables, relational expressions, etc. that show the relationship between the measurement values ​​of the second tension measuring devices 54A-54D and the set values ​​of the vibration frequencies of the second vibrating devices 56A-56D, and uses these tables, relational expressions, etc. when determining the vibration frequencies. The control device 90 sets a larger value as the measurement values ​​of the second tension measuring devices 54A-54D are larger.

[0048] Next, in step S204, the control device 90 operates the second vibration devices 56A-56D at the vibration frequency determined in step S202. This causes the deposit guide units 42A, 42B to vibrate, and the deposits on the deposit guide units 42A, 42B are guided into the deposit storage unit 40.

[0049] Next, in step S206, the control device 90 waits until a predetermined time has elapsed. The predetermined time is, for example, one minute. After the predetermined time has elapsed, the control device 90 proceeds to step S208. Note that the control device 90 may change the length of the predetermined time based on the measurement values ​​of the second tension measuring devices 54A to 54D.

[0050] When the process proceeds to step S208, the control device 90 stops the second vibration devices 56A-56D. After that, the process returns to step S14 in Fig. 6. The reason for returning to step S14 after step S20 is that by going through step S20, the deposits on the deposit guiders 42A, 42B may be guided to the deposit storage unit 40, and the deposits may accumulate in the deposit storage unit 40 to the second weight or more.

[0051] Instead of step S206, the control device 90 may monitor the measurement values ​​of the second tension measuring devices 54A-54D and determine whether the measurement values ​​are smaller than a predetermined value. In this case, the process proceeds to step S208 when the amount of deposits on the deposit guiders 42A, 42B decreases.

[0052] 6, if the determination in step S18 is negative, the control device 90 proceeds to step S22. In step S22, the control device 90 determines whether the sand flushing gate 20 is open. The determination in step S22 is positive when the communication device 92 receives information from the dam control device 22 that the sand flushing gate 20 has been opened.

[0053] When the determination in step S22 is affirmative and the process proceeds to step S24, the control device 90 forcibly moves the sediment on the sediment moving device 100 to the vicinity of the sand flushing channel 16. Specifically, the control device 90 operates the first vibration devices 50A-50D to vibrate the sediment guide units 42A, 42B, and operates the second vibration devices 56A-56D to vibrate the mesh member 32. The control device 90 also operates the suction pump 34 and the discharge pump 36. This allows the movable sediment on the sediment moving device 100 to accumulate as much as possible near the sand flushing channel 16, and allows as much sediment as possible to be discharged from the sand flushing channel 16 to the outside of the dam lake 10. The control device 90 maintains the above-mentioned state for a certain period of time, and then returns to step S10. Furthermore, the control device 90 can reduce the energy required to move the sediments toward the sand discharge channel 16 by operating the suction pump 34 and the discharge pump 36 without operating at least one of the first vibration devices 50A-50D and the second vibration devices 56A-56D.

[0054] If the determination in step S22 is negative, the process returns to step S10 without going through step S24. After returning to step S10, the above-mentioned processing is repeatedly executed.

[0055] In step S10 of FIG. 6, the control device 90 determines whether to collect the deposits on the net member 32 based on the weight of the deposits on the net member 32, but the present invention is not limited to this. For example, the control device 90 may be configured to make a positive determination in step S10 when it receives information from the dam control device 22 that the discharge gate 18 of the dam lake 10 is in an open state (information that the dam lake is in a discharge state). When discharging water, objects (such as garbage and driftwood) floating in the dam lake 10 gather near the discharge channel 14, so that the work of step S12 can be performed efficiently. In addition, for example, the determination of whether to perform step S12 may be made based on weather conditions, the occurrence of a disaster, or the like. For example, step S12 may be performed when information that a typhoon is approaching is obtained from the website of the Japan Meteorological Agency, etc. In this way, by collecting the deposits on the net member 32 before the typhoon arrives, it is possible to prevent the net member 32 from being damaged by the deposits flowing into the dam lake 10 due to the typhoon. Also, for example, step S12 may be performed at predetermined time intervals (periodically). By doing so, it is possible to omit the installation of the second tension measuring devices 54A to 54D. Also, for example, an operator may visually determine the timing of performing step S12.

[0056] In step S14, the control device 90 determines whether to move the deposits in the deposit storage unit 40 (whether to perform step S16) based on the weight of the deposits in the deposit storage unit 40, but the present invention is not limited to this. As in the case of step S12, the timing of performing step S16 may be determined based on the state of the water discharge gate 18, weather conditions, and the occurrence of a disaster, or step S16 may be performed periodically or according to the judgment of an operator. For example, if step S16 is performed when the water discharge gate 18 is open, the deposits in the deposit storage unit 40 can be efficiently moved by the water flow generated by the water discharge. In addition, by moving the deposits in the deposit storage unit 40 before a typhoon arrives, it is possible to prevent the deposits from accumulating too much in the deposit storage unit 40 after the typhoon has passed. In addition, if step S16 is performed periodically or according to the judgment of an operator, the installation of the first tension measuring devices 48A to 48D can be omitted.

[0057] Step S20 is similar to step S16, and the timing of performing step S20 may be determined based on the state of the water discharge gate 18, weather conditions, and whether or not a disaster has occurred, or step S20 may be performed periodically or according to the judgment of an operator.

[0058] The sediment (sand) discharged from the sand flushing channel 16 to the outside of the dam lake 10 is collected and accumulated in the vicinity of the dam lake 10. The sediment (sand) accumulated in the vicinity of the dam lake 10 is appropriately treated in a treatment system 200 described later.

[0059] (Modification of the deposit moving device 100) 2(a) has been described as being provided with four support columns 46A-46D, but the number of support columns may be other than four. For example, the number may be increased to six, eight, ... or decreased depending on the size of the main body 30 and the mesh member 32. Furthermore, the number of support columns supporting the deposit guide portion 42A may be different from the number of support columns supporting the deposit guide portion 42B, and the arrangement of the support columns need not be symmetrical with respect to the X-axis or Y-axis.

[0060] Note that there may be multiple mesh members 32, and a multi-layer structure may be formed in which multiple mesh members 32 overlap in the Z-axis direction. In the case of a multi-layer structure, the mesh size of the mesh members 32 located closer to the +Z side is made larger. This makes it possible to vary the size of the deposits collected by each mesh member 32. Note that the mesh members 32 do not have to cover the entire main body 30, and may cover only a portion of the main body 30 (for example, only the deposit storage section 40).

[0061] The deposit moving device 100 in FIG. 2(a) has the second tension measuring devices 54A-54D for measuring the weight of the deposit on the net member 32, the first tension measuring devices 48A-48D for measuring the weight of the deposit on the deposit guide units 42A and 42B, and the weight measuring device 52 for measuring the weight of the deposit in the deposit storage unit 40, but is not limited to this. For example, instead of the second tension measuring devices 54A-54D, a camera for photographing the net member 32 may be provided. In this case, the amount and state of the deposit on the net member 32 may be detected using a method such as machine learning based on the image of the camera, and the control device 90 may determine whether or not to execute step S12 in FIG. 6 based on the detection result. The state of the net member 32 may be detected (monitored) using other devices other than the camera. Similarly, the surface condition of the deposit induction sections 42A, 42B and the condition inside the deposit storage section 40 may be monitored by a camera or the like, and the control device 90 may determine whether or not to execute steps S16 and S20 in Figure 6 based on the results of these monitors.

[0062] In the sediment moving device 100 of FIG. 2(a), an external force is applied to the sediments in the sediment storage unit 40 by ejecting water and sediments from the water discharge pump 36, and the sediments in the sediment storage unit 40 are moved to the vicinity of the sand flushing channel 16. However, the present invention is not limited to this. For example, the sediments in the sediment storage unit 40 may be moved to the vicinity of the sand flushing channel 16 by applying other external forces to the sediments in the sediment storage unit 40. The other external forces may be the force of a fluid other than water (such as air) or may be mechanical forces (such as the force of a moving device moving in the sediment storage unit 40). The other external forces may be, for example, those that apply vibrations, such as the first vibration devices 50A-50D and the second vibration devices 56A-56D, or those that apply progressive traveling waves.

[0063] 2(a) and 2(b) illustrate the case where the deposit storage unit 40 is provided in the center of the main body unit 30 in the Y-axis direction, but the present invention is not limited to this. For example, the deposit storage unit 40 may be provided at an end of the main body unit 30 in the Y-axis direction. In other words, the main body unit 30 may have a shape in which one of the deposit guide units 42A and 42B is omitted.

[0064] (Regarding Sediment Treatment System 200) Next, a treatment system 200 for the sediments collected from the reservoir 10 (sediments (sand) discharged from the sand discharge channel 16 to the outside of the reservoir 10) will be described in detail with reference to Figs. 10 to 14.

[0065] Fig. 10 is a diagram showing a schematic configuration of a processing system 200. In addition, Fig. 11 shows a schematic control system of the processing system 200.

[0066] As shown in FIG. 10, the processing system 200 includes a funnel-shaped tank 202, a sieving device 203, a grinder 208, a belt conveyor 210, an electrolyzer 212, a hydrogen storage tank 214, a filter press 216, a rotary crushing and mixing device (twister) 220, and an additive injection device 222.

[0067] The funnel-shaped tank 202, also called a hopper, is a tank that stores the sediment S collected from the dam lake 10, and continuously supplies a constant amount of the sediment S to the sieving device 203. The sediment S includes sand, mud, gravel, soft rock, etc., and is a mixture of liquid (dam lake water) and solids. Any device other than the funnel-shaped tank 202 may be used as long as it is capable of continuously supplying a constant amount of the sediment S to the sieving device 203.

[0068] The sieving device 203 has two sieves (first sieve 204A and second sieve 204B) with different mesh sizes arranged in two vertical stages, and a receiving part 205. For example, a large stainless steel vibration sieve machine can be used as the first sieve 204A and the second sieve 204B, and the first sieve 204A and the second sieve 204B are driven by a sieve driving device 230 shown in Fig. 11. The sieve driving device 230 is controlled by a central control device 290 shown in Fig. 11.

[0069] The first sieve 204A separates the sediment S into oversized sand (referred to as sediment S1) having a first particle size (particle size 250 mm) or more and undersized sand (referred to as sediment S2) having a second particle size (particle size 2 mm) or more (and less than the first particle size) and undersized sand (referred to as sediment S3) having a second particle size (particle size less than 2 mm). The undersized sand (referred to as sediment S3) of the second sieve 204B is stored in the receiver 205. The sediments S2 and S3 are sediments having a particle size (a particle size smaller than the maximum allowable particle size) suitable for processing by the rotary crushing mixer 220. The sediment S3 is sediment having a particle size suitable for processing by the electrolyzer 212. The sieving device 203 can be said to be performing a sorting process for sorting sediment S3 having a predetermined particle size (less than the second particle size). The values ​​of the first particle size and the second particle size can be appropriately changed depending on the performance of the rotary crushing mixer 220 and the electrolyzer 212.

[0070] The surplus material (sand S1) of the first sieve 204A is sent to the crusher 208. On the other hand, the surplus material (sand S2) of the second sieve 204B is sent to the belt conveyor 210. The undersize material (sand S3) of the second sieve 204B is sent to the electrolyzer 212 or the belt conveyor 210. Here, the receiver 205 is provided with a first valve 206A and a second valve 206B, and when the first valve 206A is open, the sediment S3 is sent to the electrolyzer 212, and when the second valve 206B is open, the sediment S3 is sent to the belt conveyor 210. The opening and closing of the first valve 206A and the second valve 206B is controlled by the central control device 290 in FIG. 11 based on whether electrolysis is being performed in the electrolyzer 212. When sending the sediment S3 to the electrolyzer 212, for example, a belt conveyor (not shown), a transport pipe and a transport pump (not shown), etc. are used.

[0071] The crusher 208 crushes the sediment S1 to generate sediment S4 having a particle size suitable for the rotary crushing and mixing device 220 (for example, sediment having a particle size less than a first particle size (particle size 250 mm)). The sediment S4 generated in the crusher 208 is sent to the belt conveyor 210. The sediment S4 may be fed again into the sieving device 203.

[0072] The electrolyzer 212 includes a cylindrical tank capable of accommodating sediment S3 (solid) and water (liquid), an anode provided in the center of the tank, a cathode provided near the inner circumferential surface of the tank, and an agitator blade for agitating the inside of the tank. As shown in Fig. 11, the electrolyzer 212 also includes a moisture content measuring sensor 232 for measuring the moisture content in the tank, a water supply device 234 for supplying water into the tank, and an electrolysis control device 236 for applying a voltage to the anode and cathode of the electrolyzer 212 and controlling the agitator blade.

[0073] The electrolyzer 212 starts the electrolysis process with sediment S3 (slurry) containing water contained in the tank, and ends the electrolysis after a predetermined time (e.g., 1 hour) has elapsed (i.e., it is a batch type). The predetermined time is a time for obtaining a sufficient amount of hydrogen from the sediment S3 and water (slurry) in the tank. Therefore, the predetermined time may be appropriately changed depending on the capacity of the tank and the amount of sediment S3 and water contained in the tank. In this embodiment, during the predetermined time (e.g., 1 hour) during which electrolysis is performed in the electrolyzer 212, the sediment S3 sieved by the sieving device 203 cannot be sent to the electrolyzer 212, so the sediment S3 is sent to the belt conveyor 210 during the predetermined time. The predetermined time may be determined based on the time required for electrolysis as described above, but instead, the predetermined time may be determined depending on the processing status of the rotary crushing and mixing device 220. For example, when the amount of sediment being processed in the rotary crushing and mixing device 220 is small, the electrolysis may be terminated early and the sediment in the electrolysis device 212 may be sent to the rotary crushing and mixing device 220 .

[0074] Here, the sediment S3 contains not only soil but also sediments such as plant and animal fragments, as well as a variety of microorganisms (called contents). For this reason, it is believed that hydrogen can be extracted from the carbohydrates in the contents by electrolyzing the sediment S3 and water. It is also believed that providing electrical energy to the microorganisms activates hydrogen generation. Therefore, it is believed that more hydrogen can be extracted by electrolyzing the sediment S3 and water than by simply electrolyzing water.

[0075] The reaction formula when water is electrolyzed is as follows: 2H2O → 2H2+O2

[0076] The reaction equation when carbohydrates are electrolyzed is as follows: (CH2O) n -X → mH2 + Y

[0077] The hydrogen generated in the electrolyzer 212 is collected and stored in a hydrogen storage tank 214. Instead of using the hydrogen storage tank 214, hydrogen may be stored in a hydrogen storage alloy.

[0078] Before the electrolysis device 212 performs electrolysis, the central control device 290 measures the moisture content of the slurry in the tank using the moisture content measuring sensor 232. If the result of this measurement shows that the moisture content is lower than a predetermined value (reference value), the central control device 290 supplies water from the water supply device 234 into the tank so that the moisture content becomes the reference value. Note that the moisture content measuring sensor 232 can be a known sensor that utilizes a measurement method such as the TDR method or the ADR method.

[0079] On the other hand, after electrolysis, the water content of the slurry may be, for example, about 5 to 30%, and the fluidity may be low, making it difficult to transport. Therefore, even after electrolysis, the central control device 290 uses the water content measuring sensor 232 to measure the water content of the slurry in the tank. If the value of the water content is within a range indicating low fluidity, water is supplied from the water supply device 234 into the tank to increase the fluidity of the slurry. This makes it easier to transport the slurry (referred to as sediment S4) in the tank to the filter press 216 using a pipe connecting the electrolysis device 212 and the filter press 216. Note that, in order to wash away the sediment adhering to the inside of the tank, it is preferable that the water supply device 234 supplies water along the inner wall of the tank. Note that the water supplied from the water supply device 234 may be pure water, but it may also be tap water or water from a dam lake. In order to prevent the slurry from adhering to the tank, a material that prevents adhesion of viscous substances, such as an anti-adhesion agent described in Japanese Patent No. 6513272, may be applied to the inner surface of the tank.

[0080] In addition, hydrogen may be generated from the sediment S3 using a hydrogen generation device that generates hydrogen from mud using electricity, such as that disclosed in JP 2021-190394 A, without being limited to electrolysis of the sediment S3.

[0081] The hydrogen storage tank 214 stores hydrogen generated by electrolysis. The hydrogen stored in the hydrogen storage tank 214 can be used in a fuel cell. For example, if the treatment system 200 is located near the dam lake 10, the power of the fuel cell can be used to open and close the water discharge gate 18 and sand discharge gate 20 of the dam lake 10. A crane or a crane truck can also be driven using the power of the fuel cell. The above-mentioned sediment moving device 100 may also be driven using the power of the fuel cell. Also, by storing hydrogen in the hydrogen storage tank 214 before a typhoon or the like, it becomes possible to use hydrogen as an emergency power source.

[0082] The filter press 216 is a device that performs a pressure filtration process to pressure-filter the sediment S5 after electrolysis, and then performs squeezing and drying. A pump 238 shown in FIG. 11 is used to transport the sediment S5 from the electrolyzer 212 to the filter press 216. The pump 238 is controlled by a central control device 290. The filter press 216 has a filter plate, a filter cloth, and a filter frame, and the sediment S5 (slurry) is poured into the filter frame sandwiched between the filter cloth and the filter plate, and is squeezed and dried. The filter press 216 performs squeezing and drying under the control of a filter press control device 240 shown in FIG. 11. Then, when the moisture content of the sediment S5 reaches an appropriate moisture content for processing in the rotary crushing and mixing device 220, for example, 20 to 50%, preferably 40%, the filter press control device 240 ends squeezing and drying. The central control device 290 may determine whether the moisture content of the sediment S5 has reached an appropriate moisture content from the time that has elapsed since the start of pressure filtration, or from the detection value of a moisture sensor (not shown).

[0083] When squeezing and drying are completed in the filter press 216, the squeezed and dried sediment S6 is discharged from the filter press 216 and sent onto the belt conveyor 210.

[0084] The belt conveyor 210 transports the sediment S2, S3, S4, and S6 sent to the belt conveyor 210 to the rotary crushing and mixing device 220.

[0085] The rotary crushing and mixing device 220 is a device used for improving sediment and making effective use of it. The rotary crushing and mixing device 220 executes a process of crushing and finely granulating the sediment and dispersing it uniformly. In addition, additives (lime-based solidification materials such as quicklime and hydrated lime, cement-based solidification materials such as ordinary cement and blast furnace cement, soil improvement materials made of polymer materials, natural fibers, chemical fibers made of resin, etc.) are also fed to the rotary crushing and mixing device 220 from an additive feeding device 222 as necessary. When the additives are fed, the rotary crushing and mixing device 220 mixes the sediment and the additives to make improved soil, thereby adjusting the properties and strength of the improved soil. Note that, as the rotary crushing and mixing device 220, devices disclosed in, for example, Patent No. 7074934, Patent No. 7137025, Patent No. 7261941, etc. can be used. In order to prevent the slurry from adhering to the drum (fixed drum or rotating drum) into which the sediment is fed in the rotary crushing and mixing device 220, a material that prevents adhesion of viscous substances, such as an anti-adhesion agent described in Patent No. 6513272, may be applied to the inner surface of the drum.

[0086] The additive feeding device 222 is a device that feeds additives to the rotary crushing and mixing device 220. The additive feeding device 222 is provided with an additive feeding amount adjusting device 242 shown in Figure 11. This additive feeding amount adjusting device 242 adjusts the amount of additives fed under the instruction of the central control device 290.

[0087] The central control device 290 controls the additive input amount adjusting device 242 based on information obtained from a scanner 218 provided near the belt conveyor 210. Here, the scanner 218 is a LiDAR (Light Detection And Ranging) or a camera, and measures the amount of sediment on the belt conveyor 210 (i.e., the amount of sediment input to the rotary crushing mixer 220). Note that instead of the scanner 218, a weighing scale that measures the weight of the sediment on the belt conveyor 210 may be used.

[0088] (Regarding the processing of the central control unit 290) The processing of the central control device 290 will be described in detail below with reference to the flowcharts of Figures 12 to 14 and other drawings as appropriate. Figure 12 is a flowchart (part 1) showing the processing of the central control device 290, Figure 13 is a flowchart (part 2) showing the processing of the central control device 290, and Figure 14 is a flowchart (part 3) showing the processing of the central control device 290. The processing of Figures 12 to 14 is executed simultaneously in parallel.

[0089] (Regarding the processing in Figure 12) As a prerequisite for starting the process of FIG. 12, it is assumed that sediment S is contained in the funnel-shaped tank 202, and that the sieving device 203, the crusher 208, the belt conveyor 210, and the rotary crushing and mixing device 220 have started operating.

[0090] When the process of FIG. 12 is started, first, in step S300, the central control device 290 opens the first valve 206A of the sieving device 203 and closes the second valve 206B. That is, the sediment S3 sieved in the sieving device 203 is sent to the electrolyzer 212. In this state, the sediment S1 sieved in the sieving device 203 is sent to the crusher 208, and the sediment S4 crushed and discharged in the crusher 208 is sent to the rotary crushing and mixing device 220 via the belt conveyor 210. In addition, the sediment S2 sieved in the sieving device 203 is also sent to the rotary crushing and mixing device 220 via the belt conveyor 210.

[0091] Next, in step S302, the central controller 290 waits until a predetermined amount of sediment S3 is added to the tank of the electrolyzer 212. Whether or not the predetermined amount has been added may be detected by using various sensors such as a camera or a weight sensor (not shown). When the predetermined amount of sediment has been added to the tank, the central controller 290 proceeds to step S304.

[0092] In step S304, the central control device 290 opens the second valve 206B of the sieving device 203 and closes the first valve 206A. That is, the sediment S3 sieved in the sieving device 203 is sent to the rotary crushing and mixing device 220 via the belt conveyor 210.

[0093] Next, in step S306, the central controller 290 monitors the measurement value of the moisture content measuring sensor 232 of the electrolyzer 212 and determines whether the moisture content of the slurry containing the sediment S3 is appropriate. If the determination in step S306 is negative, the process proceeds to step S308, where the central controller 290 supplies water from the water supply device 234 to the slurry in the tank of the electrolyzer 212. Thereafter, step S308 is repeated until the determination in step S306 is positive, and if the determination in step S306 is positive, the process proceeds to step S310.

[0094] When the process proceeds to step S310, the central controller 290 issues an instruction to the electrolysis control device 236 to cause the electrolysis device 212 to perform electrolysis. The hydrogen produced by the electrolysis is stored in the hydrogen storage tank 214. As described above, the electrolysis by the electrolyzer 212 requires a predetermined time (e.g., one hour). Therefore, after the predetermined time has elapsed since the start of step S310, the central controller 290 proceeds to step S312.

[0095] In step S312, the central controller 290 monitors the measurement value of the moisture content measuring sensor 232 of the electrolyzer 212 and determines whether the moisture content of the sediment (slurry) after electrolysis is appropriate for transportation. If the determination in step S312 is negative, the process proceeds to step S314, where the central controller 290 supplies water from the water supply device 234 to the slurry in the tank of the electrolyzer 212. Thereafter, step S314 is repeated until the determination in step S312 is positive, and if the determination in step S312 is positive, the process proceeds to step S316.

[0096] When the process proceeds to step S316, the central controller 290 controls the pump 238 to transport the sediment S5 to the filter press 216 (performs the transport process). After the process of step S316 is performed, the central controller 290 returns to step S300 and repeatedly executes the above-mentioned processes.

[0097] (Regarding the processing in Figure 13) When the process of Fig. 13 is started, first, in step S400, the central controller 290 waits until sediment S5 is transported from the electrolyzer 212 to the filter press 216. That is, the central controller 290 waits until the process of step S316 in Fig. 12 is executed. After that, when the process of step S316 in Fig. 12 is executed, the central controller 290 proceeds to step S402.

[0098] In step S402, the central control device 290 issues an instruction to the filter press control device 240 to start squeezing and drying the sediment S5.

[0099] Next, in step S404, the central control device 290 waits until the moisture content of the sediment S5 becomes an appropriate moisture content for processing in the rotary crushing and mixing device 220. When the moisture content of the sediment S5 becomes the appropriate moisture content, the central control device 290 proceeds to step S406.

[0100] In step S406, the central controller 290 issues an instruction to the filter press controller 240 to end squeezing and drying. Then, the central controller 290 issues an instruction to the filter press controller 240 to discharge the squeezed and dried sediment S6 onto the belt conveyor 210.

[0101] After step S406, the process returns to step S400. Thereafter, the above-described process of FIG.

[0102] (Regarding the processing in Figure 14) When the process of FIG. 14 starts, the central control device 290 first monitors the amount of sand deposited on the belt conveyor 210 using the scanner 218 in step S500.

[0103] Next, in step S502, the central control device 290 determines whether or not the amount of additive added needs to be adjusted based on the amount of sediment on the belt conveyor 210. For example, the central control device 290 holds a table that records the relationship between the amount of sediment and the appropriate amount of additive added, and uses the table to identify the appropriate amount of additive added that corresponds to the amount of sediment on the belt conveyor 210 obtained from the scanner 218. Then, the central control device 290 determines that adjustment is necessary when the appropriate amount differs from the current amount of additive added.

[0104] If the determination in step S502 is negative (if adjustment is not necessary), the process returns to step S500. On the other hand, if the determination in step S502 is positive (if adjustment is necessary), the process proceeds to step S504.

[0105] In step S504, the central control device 290 issues an instruction to the additive input amount adjusting device 242 to adjust the input amount of the additive. That is, the amount of the additive input from the additive input device 222 is adjusted to an appropriate input amount.

[0106] After the process of step S504 is performed, the process returns to step S500. After that, the process of Fig. 14 described above is repeatedly executed.

[0107] In this embodiment, the processing system 200 performs the processing shown in FIGS. 12 to 14, whereby the slurry containing the sediment S can be efficiently processed.

[0108] As described above in detail, according to this embodiment, the deposit moving device 100 includes the main body 30, the first vibration devices 50A-50D that vibrate the main body 30, and the control device 90 that controls the vibration of the first vibration devices 50A-50D to move the deposits deposited on the main body 30 on the main body 30. This allows the deposits deposited on the main body 30 to be moved to an appropriate position by the vibration of the first vibration devices 50A-50D. Here, the first vibration devices 50A-50D move the deposits into the deposit storage section 40 of the main body 30 by vibrating the deposit guide sections 42A and 42B of the main body 30. This allows the deposits that have fallen onto the main body 30 to be collected in the deposit storage section 40. In addition, since the deposit guide sections 42A and 42B have inclined surfaces, the deposits can be efficiently moved along the inclined surfaces of the deposit guide sections 42A and 42B by the vibration of the first vibration devices 50A-50D. In addition, the water discharge pump 36 sprays water and sediments onto the sediments that have accumulated in the sediment storage section 40, exerting an external force on the sediments, thereby moving the sediments outside the sediment moving device 100 (near the sand discharge channel 16), thereby enabling the sediments to be efficiently discharged from the sand discharge channel 16.

[0109] Furthermore, according to this embodiment, the deposit moving device 100 is equipped with first tension measuring devices 48A-48D that detect the weight of the deposit piled up on the main body part 30, and the control device 90 controls the vibration of the first vibrating devices 50A-50D based on the measurement values ​​of the first tension measuring devices 48A-48D. This makes it possible to move the deposit on the main body part 30 at the timing when the amount of deposit on the main body part 30 becomes large.

[0110] Moreover, in this embodiment, the deposit moving device 100 is provided with a mesh member 32 that is provided above the main body 30 and that suppresses the deposition of objects having a predetermined particle size or larger on the main body 30. This makes it possible to prevent objects having a predetermined particle size or larger from depositing on the main body 30.

[0111] Moreover, in this embodiment, the sediment moving device 100 is equipped with second vibrating devices 56A-56D that impart vibrations to the mesh member 32. Thereby, the vibrations of the second vibrating devices 56A-56D can peel off sand adhering to gravel and the like on the mesh member 32 and crush lumps of soil.

[0112] Furthermore, in this embodiment, the deposit moving device 100 includes second tension measuring devices 54A-54D that measure the weight of the deposit accumulated on the mesh member 32, and the control device 90 controls the vibration of the second vibrating devices 56A-56D based on the measurement values ​​of the second tension measuring devices 54A-54D. This allows the second vibrating devices 56A-56D to vibrate at appropriate timing.

[0113] Furthermore, in this embodiment, the sediment moving device 100 is equipped with a weight measuring device 52 that measures the weight of the sediment collected in the sediment storage section 40, and the control device 90 controls the water intake pump 34 and the water discharge pump 36 based on the measurement results of the weight measuring device 52. This allows the water intake pump 34 and the water discharge pump 36 to operate at appropriate timing.

[0114] In this embodiment, a crane or a crane vehicle collects the sediments accumulated on the mesh member 32. This makes it possible to prevent the sediments accumulated on the mesh member 32 from interfering with the movement of objects having small particle sizes downwardly of the mesh member 32.

[0115] In this embodiment, the treatment system 200 electrolyzes at least the water in the slurry, which is a mixture of sediment and water, and at least one of crushing and mixing the sediment after electrolysis. This makes it possible to generate hydrogen by electrolysis and to effectively use the sediment after electrolysis as improved soil.

[0116] In this embodiment, the treatment system 200 performs pressure filtration, squeezing, and drying of the slurry after electrolysis, and then performs crushing and mixing using the rotary crushing and mixing device 220. In this way, the slurry (sediment) having an appropriate moisture content for the rotary crushing and mixing device 220 can be treated in the rotary crushing and mixing device 220.

[0117] In addition, in the treatment system 200 of this embodiment, water is supplied to the slurry after electrolysis by the water supply device 234 according to the water content of the slurry before the slurry is transported to the filter press 216. This makes it easier to transport the slurry from the electrolysis device 212 to the filter press 216.

[0118] Furthermore, the treatment system 200 of this embodiment supplies water to the slurry using the water supply device 234 in accordance with the water content of the slurry before electrolysis. This allows efficient electrolysis in the electrolyzer 212.

[0119] Furthermore, the treatment system 200 of this embodiment sieves out sediment having a predetermined particle size or less, and uses the sieved sediment for electrolysis, so that sediment having an appropriate particle size can be used for electrolysis.

[0120] In addition, the processing system 200 of this embodiment detects the amount of sediment on the belt conveyor 210 using the scanner 218, and inputs an amount of additive based on the detection result into the rotary crushing and mixing device 220. This makes it possible to input an appropriate amount of additive into the rotary crushing and mixing device 220.

[0121] In the above embodiment, the slurry, which is a mixture of sediment and water, may be filtered under pressure, pressed and dried, and the water obtained from the slurry may then be electrolyzed. In this manner, hydrogen can be obtained through electrolysis, and the pressed and dried sediment can be effectively utilized, for example, by making it into improved soil.

[0122] In the above embodiment, the rotary crushing and mixing device 220 performs both crushing and mixing, but this is not limited thereto, and the rotary crushing and mixing device 220 may perform only one of crushing and mixing.

[0123] In the above embodiment, the case where only the sediment S3 sieved by the sieving device 203 is used for electrolysis has been described, but the present invention is not limited to this, and the sediment S1 or S2 may be used for electrolysis.

[0124] In the above embodiment, a case has been described in which one sediment moving device 100 is provided on the bottom of the dam lake 10, but this is not limiting, and multiple sediment moving devices 100 may be provided on the bottom of the dam lake 10, as shown in Fig. 15. In this case, the sediment moved by the sediment moving device 100 on the upper left (or upper right) of Fig. 15 can be sucked in by the suction pump 34 of the sediment moving device 100 on the lower left (lower right) of Fig. 15 and sprayed out from the discharge pump 36.

[0125] In the above embodiment, the sediment moving device 100 is installed on the bottom of the dam lake 10. However, the present invention is not limited to this, and the sediment moving device 100 may be installed on the ground. For example, the sediment moving device 100 may be installed under a cliff. In this case, objects (such as gravel and sand) that fall from the cliff fall onto the sediment moving device 100 and are screened by the mesh member 32, and small objects are accumulated in the sediment storage section 40 of the main body 30. Then, by applying an external force (for example, a fluid such as a liquid or gas) to the objects accumulated in the sediment storage section 40, the objects can be moved to the outside of the sediment moving device 100.

[0126] The above-described embodiment is a preferred example of the present invention, but the present invention is not limited to this embodiment and can be modified in various ways without departing from the scope of the present invention. [Explanation of symbols]

[0127] 30 Main body 32 Mesh members 34 Suction pump 36 Water discharge pump 48A~48D First tension measuring device 50A~50D First vibration device 52 Weight measuring device 54A~54D Second tension measuring device 56A~56D 2nd vibration device 90 Control device 100 Sediment moving device

Claims

1. An electrolysis step of electrolyzing at least the liquid of a slurry which is a mixture of a solid and a liquid; and a processing step of at least one of crushing and mixing the solid.

2. A pressure filtration step of pressure filtering the slurry after the electrolysis, The method for treating a slurry according to claim 1 , wherein the treatment step comprises subjecting the solid after the pressure filtration to at least one of the crushing and the mixing.

3. A conveying step of conveying the slurry after the electrolysis step to an apparatus that performs the pressure filtration step, The method for treating a slurry according to claim 2 , further comprising the step of: supplying water to the slurry in accordance with a water content of the slurry prior to the transporting step.

4. The method for treating a slurry according to claim 1 , further comprising the step of supplying water to the slurry in accordance with a moisture content of the slurry before the electrolysis is performed.

5. 2. The method for treating a slurry according to claim 1, further comprising a coating step of coating at least one of an apparatus for performing the electrolysis step and an apparatus for performing the treatment step with a material that prevents adhesion of viscous matter thereto.

6. A sorting step of sorting out solids having a particle size smaller than a predetermined particle size; The method for treating a slurry according to claim 1 , further comprising a preparation step of preparing the slurry to be used in the electrolysis step by using the solids separated in the separation step.

7. The method for treating a slurry according to claim 6 , wherein the solids subjected to at least one of the crushing and the mixing in the treatment step also include solids that were not separated in the separation step.

8. The method for treating a slurry according to claim 7, further comprising a crushing step of crushing at least a portion of the solids not separated in the separating step, prior to the treating step.

9. 2. The method for treating a slurry according to claim 1, further comprising the step of detecting an amount of solids fed into an apparatus for carrying out said treatment step, and adding an additive to said solids before said treatment step in an amount based on the detection result.

10. The method for treating a slurry according to claim 1 , further comprising the step of setting a time for said electrolysis based on a treatment status in said treatment step.

11. An electrolysis step of electrolyzing a slurry, which is a mixture of a solid and a liquid; and a pressure filtration step of pressure filtering the electrolyzed slurry.

12. The method for treating a slurry according to claim 11, further comprising a step of subjecting the solids after the pressure filtration to at least one of crushing and mixing.

13. A step of filtering the slurry, which is a mixture of solids and liquids, under pressure; and electrolyzing the pressure-filtered slurry liquid.

14. The method for treating a slurry according to claim 13, further comprising a step of at least one of crushing and mixing the solid after the electrolysis.

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