Water treatment device and water treatment system

Abstract

To provide a water treatment device which enables reduction of a workload needed for maintenance of the facility, and to provide a water treatment system.SOLUTION: A water treatment device stirs a liquid and has: a first blade frame supporting one or more first stirring blades; and a storage frame in which the first blade frame is stored. The storage frame has a first guide part extending in a vertical direction. The first blade frame slides in a vertical direction along the first guide part and stirs the liquid located in the storage frame with the one or more first stirring blades.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a water treatment device and a water treatment system. [Background technology]

[0002] For example, water purification plants use water treatment systems that remove suspended solids (SS) contained in raw water (hereinafter also referred to as treated liquid or simply liquid) such as river water or well water. Specifically, in such water treatment systems, for example, the treated liquid to which a flocculant has been added is stirred to flocculate the suspended solids contained in the treated liquid, which are then precipitated and removed (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-068232 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the water treatment system as described above, for example, it is desired to reduce the workload required for maintenance of the equipment. [Means for solving the problem]

[0005] In order to reduce the workload required for maintenance as described above, the water treatment device of the present invention is a water treatment device that agitates a liquid, and has a first blade frame that supports one or more first agitating blades, and a storage frame that houses the first blade frame, the storage frame having a first guide portion extending vertically, the first blade frame sliding vertically along the first guide portion, and the liquid located in the storage frame is agitated by the one or more first agitating blades. Effect of the Invention

[0006] According to the water treatment device of the present invention, it is possible to reduce the workload required for maintenance of the facility. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating a configuration of a water treatment system 1000 according to the first embodiment. [Diagram 2] FIG. 2 is a front view of the flocculation basin 400 in the first embodiment. [Diagram 3] FIG. 3 is a top view of the flocculation basin 400 in the first embodiment. [Figure 4] FIG. 4 is a side view of the flocculation basin 400 in the first embodiment. [Diagram 5] FIG. 5 is a perspective view illustrating the configuration of the water treatment device 10 according to the first embodiment. [Figure 6] FIG. 6 is a diagram illustrating a configuration for performing up and down reciprocating motion of the blade frame 12 and the blade frame 14. As shown in FIG. [Figure 7] FIG. 7 is a diagram for explaining a specific example of the up and down reciprocating motion of the blade frame 12 and the blade frame 14. In FIG. [Figure 8] FIG. 8 is a diagram illustrating the configuration of a water treatment device 40 according to the first embodiment. [Figure 9] FIG. 9 is a diagram illustrating a configuration for performing up and down reciprocating motion of the blade frame 42 and the blade frame 44. As shown in FIG. [Figure 10] FIG. 10 is a diagram for explaining a specific example of the up and down reciprocating motion of the blade frames 42 and 44. In FIG. [Figure 11] FIG. 11 is a diagram illustrating the configuration of a water treatment device 40 in a modified example. [Figure 12] FIG. 12 is a diagram illustrating the experimental results for the first and second embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited to these embodiments.

[0009] [Water treatment system 1000 according to the first embodiment] First, a configuration example of a water treatment system 1000 in the first embodiment will be described. Fig. 1 is a diagram illustrating the configuration of a water treatment system 1000 in the first embodiment.

[0010] The water treatment system 1000 is, for example, a water purification system installed in a water purification plant. Specifically, as shown in Fig. 1, the water treatment system 1000 includes, for example, a gritification basin 100, a receiving well 200, a mixing basin 300, a flocculation basin 400, a sedimentation basin 500, a filtration basin 600, a purified water basin 700, a distributing basin 800, a storage tank T, and a pump P.

[0011] The grit basin 100 is, for example, a tank into which the liquid to be treated first flows, and is a tank in which sedimentation and removal of sand and the like contained in the liquid to be treated is performed.

[0012] The receiving well 200 is, for example, a tank that adjusts the amount of treated liquid supplied from the gritification basin 100 and supplies it to the mixing basin 300.

[0013] The mixing basin 300 is, for example, a tank in which a flocculant is injected into the liquid to be treated supplied from the receiving well 200 .

[0014] The flocculation basin 400 is a tank in which, for example, the liquid to be treated supplied from the mixing basin 300 is stirred, and suspended solids contained in the liquid to be treated supplied from the mixing basin 300 are coagulated by a coagulant to form flocs.

[0015] The settling basin 500 is, for example, a tank in which flocs contained in the liquid to be treated supplied from the flocculation basin 400 are allowed to settle and are separated from the liquid to be treated.

[0016] The filtration basin 600 is a tank that filters the liquid to be treated supplied from the settling basin 500 by using a filter body (not shown) made of, for example, sand, gravel, or the like.

[0017] The purified water reservoir 700 is, for example, a tank that temporarily stores the treated liquid supplied from the filtration reservoir 600 (for example, the treated liquid after chlorine disinfection in the downstream of the filtration reservoir 600) and supplies it to the distributing reservoir 800.

[0018] The water distribution reservoir 800 temporarily stores the liquid to be treated (treated water) supplied from the purified water reservoir 700, for example, and supplies it to homes or the like (not shown).

[0019] The storage tank T is, for example, a tank for storing a flocculant to be injected into the liquid to be treated, and supplies the flocculant to the pump P.

[0020] The pump P is, for example, a pump provided in a pipe (not shown) that communicates between the storage tank T and the mixing basin 300. Specifically, the pump P supplies the mixing basin 300 with a flocculant corresponding to an injection rate that is determined in advance by, for example, an administrator of the water treatment system 1000 (hereinafter, also simply referred to as an administrator). Note that the pump P may also supply the flocculant to a pipe (not shown) that communicates between the receiving well 200 and the mixing basin 300.

[0021] [Flocculation basin 400 in the first embodiment] Next, a configuration example of the flocculation basin 400 in the first embodiment will be described. Fig. 2 to Fig. 4 are diagrams for explaining the configuration of the flocculation basin 400 in the first embodiment. Specifically, Fig. 2 is a front view of the flocculation basin 400 in the first embodiment. Fig. 3 is a top view of the flocculation basin 400 in the first embodiment. Furthermore, Fig. 4 is a side view of the flocculation basin 400 in the first embodiment.

[0022] The flocculation basin 400 includes, for example, a water treatment device 10 and a tank 20, as shown in FIGS.

[0023] The tank 20 is, for example, a tank that stores the liquid to be treated supplied from the mixing basin 300. Specifically, the tank 20 is, for example, a tank that is open vertically upward (Z1 direction side) as shown in Figures 2 and 4.

[0024] The water treatment device 10 is, for example, a device fixed to the bottom of a tank 20. The water treatment device 10 accommodates, for example, a blade frame 12 (hereinafter also referred to as the first blade frame 12) to which one or more agitating blades 11 (hereinafter also referred to as the first agitating blade 11) are attached, and a blade frame 14 (hereinafter also referred to as the second blade frame 14) to which one or more agitating blades 13 (hereinafter also referred to as the second agitating blade 13) are attached.

[0025] In the following, the four water treatment devices 10 are fixed in the tank 20, but the number of water treatment devices 10 is not limited to this. Specifically, the tank 20 may have a number of water treatment devices 10 other than four. That is, the tank 20 may have a number of water treatment devices 10 fixed therein, depending on the size of the tank 20 in the XY plane (the size of the tank 20), for example. In addition, the following description is given assuming that the blade frame 12 and the blade frame 14 (two blade frames) are accommodated in each water treatment device 10, but the number of blade frames is not limited to this. Specifically, each water treatment device 10 may have a number of blade frames other than two, for example. In addition, the following description is given assuming that four agitating blades 11 are attached to each blade frame 12, and four agitating blades 13 are attached to each blade frame 14, but the number of agitating blades other than four, for example, may be attached to each blade frame 12 and blade frame 14. That is, each of the blade frames 12 and 14 may be provided with a number of stirring blades according to, for example, the size of the tank 20 in the Z-axis direction (the depth of the tank 20) ​​and the like.

[0026] Specifically, in the tank 20, as shown in FIGS. 2 and 3, for example, a water treatment device 10a, a water treatment device 10b, a water treatment device 10c, and a water treatment device 10d are arranged along the Y-axis direction.

[0027] In addition, in the water treatment device 10a, as shown in Figures 3 and 4, for example, the blade frame 12a and the blade frame 14a are arranged along the X-axis, in the water treatment device 10b, for example, the blade frame 12b and the blade frame 14b are arranged along the X-axis, in the water treatment device 10c, for example, the blade frame 12c and the blade frame 14c are arranged along the X-axis, and in the water treatment device 10d, for example, the blade frame 12d and the blade frame 14d are arranged along the X-axis.

[0028] 2, for example, four stirring blades 11a are attached to the blade frame 12a at intervals along the Z-axis direction, for example, four stirring blades 11b are attached to the blade frame 12b at intervals along the Z-axis direction, for example, four stirring blades 11c are attached to the blade frame 12c at intervals along the Z-axis direction, and for example, four stirring blades 11d are attached to the blade frame 12d at intervals along the Z-axis direction. Also, for example, four stirring blades 11 (not shown) are attached to each of the blade frames 14a, 14b, 14c, and 14d at intervals along the Z-axis direction, similar to the case of the blade frame 12a, etc.

[0029] In the flocculation basin 400, as described below, the blade frames 12 and 14 are caused to reciprocate up and down in the Z-axis direction to agitate the liquid to be treated in the tank 20. Specifically, in the flocculation basin 400, the agitating blades attached to the blade frames 12 and 14 are caused to reciprocate up and down to agitate the liquid to be treated in the tank 20.

[0030] The liquid to be treated supplied from the mixing basin 300 may be supplied into the tank 20 from a supply port (not shown) provided on the X1 direction side of the tank 20. The liquid to be treated that has been stirred in the tank 20 may be discharged into the settling basin 500 from a discharge port (not shown) provided on the X2 direction side of the tank 20.

[0031] [Water Treatment Device 10 in the First Embodiment] Next, the configuration of the water treatment device 10 in the first embodiment will be described. Fig. 5 is a diagram illustrating the configuration of the water treatment device 10 in the first embodiment. Specifically, Fig. 5 is a perspective view illustrating the configuration of the water treatment device 10 in the first embodiment.

[0032] 5, the water treatment device 10 has, for example, a storage frame 15. The storage frame 15 is provided with, for example, a guide member 16 (hereinafter also referred to as a first guide portion 16) and a guide member 17 (hereinafter also referred to as a second guide portion 17).

[0033] The storage frame 15 is, for example, a rectangular parallelepiped frame formed by twelve rod-shaped members (rod-shaped member 15a, rod-shaped member 15b, rod-shaped member 15c, rod-shaped member 15d, rod-shaped member 15e, rod-shaped member 15f, rod-shaped member 15g, rod-shaped member 15h, rod-shaped member 15i, rod-shaped member 15j, rod-shaped member 15k, and rod-shaped member 15l).

[0034] Specifically, the storage frame 15 has one of the vertices of a rectangular parallelepiped shape formed by, for example, fixing the ends of rod-shaped member 15a, rod-shaped member 15b, and rod-shaped member 15e together by welding or the like, one of the vertices of the rectangular parallelepiped shape formed by fixing the ends of rod-shaped member 15b, rod-shaped member 15c, and rod-shaped member 15f together, one of the vertices of the rectangular parallelepiped shape formed by fixing the ends of rod-shaped member 15c, rod-shaped member 15d, and rod-shaped member 15g together, and one of the vertices of the rectangular parallelepiped shape formed by fixing the ends of rod-shaped member 15a, rod-shaped member 15d, and rod-shaped member 15h together. In addition, the storage frame 15 has, for example, one of the vertices of a rectangular parallelepiped shape formed by fixing the ends of rod-shaped members 15e, 15i, and 15j together, one of the vertices of a rectangular parallelepiped shape formed by fixing the ends of rod-shaped members 15f, 15j, and 15k together, one of the vertices of a rectangular parallelepiped shape formed by fixing the ends of rod-shaped members 15g, 15k, and 15l together, and one of the vertices of a rectangular parallelepiped shape formed by fixing the ends of rod-shaped members 15h, 15i, and 15l together.

[0035] That is, the storage frame 15 has, for example, a rectangular parallelepiped shape with each side open, and has a shape that allows the liquid to be treated stored in the tank 20 to flow into the inside.

[0036] Storage frame 15 may be, for example, a cubic shape formed by twelve rod-shaped members. Storage frame 15 may further include, for example, other rod-shaped members (for example, other rod-shaped members each having both ends fixed to rod-shaped member 15b and rod-shaped member 15d) for the purpose of ensuring strength, etc.

[0037] The blade frame 12 is, for example, a hollow rectangular frame extending on the YZ plane. Each agitating blade 11 attached to the blade frame 42 is, for example, a rectangular plate-shaped member, and is attached so that the longitudinal direction is along the Y axis in the hollow space of the blade frame 12. Specifically, for example, one end (end on the Y1 direction side) of the longitudinal direction of each agitating blade 11 is attached to the side wall of the blade frame 12 on the Y1 direction side, and the other end (end on the Y2 direction side) of the longitudinal direction is attached to the side wall of the blade frame 12 on the Y2 direction side.

[0038] The blade frame 12 shown in FIG. 5 has an open lower end (the end on the Z2 direction side), but is not limited to this. Specifically, the blade frame 12 may have a shape in which the lower end is not open, for example. Also, each agitating blade 11 in the example shown in FIG. 5 is attached to the lower side (Z2 direction side) in the hollow space of the blade frame 12, but is not limited to this. Specifically, each agitating blade 11 may be attached to the upper side (Z1 direction side) in the hollow space of the blade frame 12, for example.

[0039] 5 are attached to the side walls (the side walls on the Y1 direction side and the side walls on the Y2 direction side) of the blade frame 12, but are not limited thereto. Specifically, each agitator blade 11 may function as a baffle plate that obstructs the water flow of the liquid to be treated by being fixed (supported) from the lower side (Z2 direction side) by a fixing member (not shown) attached to the storage frame 15 (for example, at least one of the rod-shaped member 15i, the rod-shaped member 15j, the rod-shaped member 15k, and the rod-shaped member 15l). In this case, the fixing member may fix each agitator blade 11 from below near the center of each agitator blade 11 in the longitudinal direction (Y axis direction). Furthermore, each agitator blade 11 may function as a baffle plate that obstructs the water flow of the liquid to be treated, for example, by being fixed from above (Z1 direction side) by a fixing member (not shown) attached to the storage frame 15 (for example, at least one of rod-shaped member 15a, rod-shaped member 15b, rod-shaped member 15c, and rod-shaped member 15d). In this case, the fixing member may fix each agitator blade 11 from above, for example, near the center of each agitator blade 11 in the longitudinal direction (Y-axis direction).

[0040] The blade frame 14 is, for example, a hollow rectangular frame, similar to the blade frame 12. And, each agitating blade 13 is, for example, a rectangular plate-like member, similar to each agitating blade 11, and is attached so that the longitudinal direction is along the Y axis in the hollow space of the blade frame 14. Specifically, for example, one end (end on the Y1 direction side) of the longitudinal direction of each agitating blade 13 is attached to the side wall of the blade frame 14 on the Y1 direction side, and the other end (end on the Y2 direction side) of the longitudinal direction is attached to the side wall of the blade frame 14 on the Y2 direction side.

[0041] The blade frame 14 shown in Fig. 5 has an open lower end (the end on the Z2 direction side), but is not limited to this. Specifically, the blade frame 14 may have a shape in which the lower end is not open, for example. Also, each stirring blade 13 may be attached to the lower side (Z2 direction side) in the hollow space of the blade frame 14, as shown in Fig. 5, for example.

[0042] 5 are attached to the side walls (the side walls on the Y1 direction side and the side walls on the Y2 direction side) of the blade frame 14, but are not limited thereto. Specifically, each agitator blade 13 may function as a baffle plate that obstructs the water flow of the liquid to be treated by being fixed (supported) from the lower side (Z2 direction side) by a fixing member (not shown) attached to the storage frame 15 (for example, at least one of the rod-shaped member 15i, the rod-shaped member 15j, the rod-shaped member 15k, and the rod-shaped member 15l). In this case, the fixing member may fix each agitator blade 13 from below, for example, near the center of each agitator blade 13 in the longitudinal direction (Y axis direction). Furthermore, each agitating blade 13 may function as a baffle plate that obstructs the water flow of the liquid to be treated, for example, by being fixed from above (Z1 direction side) by a fixing member (not shown) attached to the accommodation frame 15 (for example, at least one of rod-shaped member 15a, rod-shaped member 15b, rod-shaped member 15c, and rod-shaped member 15d). In this case, the fixing member may fix each agitating blade 13 from above, for example, near the center of each agitating blade 13 in the longitudinal direction (Y-axis direction).

[0043] The guide members 16 include, for example, guide members 16a and 16b, and support (sandwich) the blade frame 12 from the Y1 direction side and the Y2 direction side (horizontal direction) in a state where the blade frame 12 is slidable in the Z axis direction (vertical direction).

[0044] Specifically, as shown in Fig. 5, the guide member 16a is a member having, for example, one end (the end on the Z1 direction side) fixed to the rod-shaped member 15b and the other end (the end on the Z2 direction side) fixed to the rod-shaped member 15j. That is, the guide member 16a is a member provided on, for example, the side surface on the Y2 direction side of the accommodation frame 15. The guide member 16a has a shape in which, for example, two points near both ends are curved (bent) so that a central rod-shaped portion (hereinafter also referred to as the rod-shaped portion of the guide member 16a) protrudes toward the Y1 direction. Furthermore, the rod-shaped portion of the guide member 16a has a shape extending, for example, along the Z axis direction (i.e., the direction in which the blade frame 12 slides).

[0045] 5, the guide member 16b is a member having, for example, one end (the end on the Z1 direction side) fixed to the rod-shaped member 15d and the other end (the end on the Z2 direction side) fixed to the rod-shaped member 15l. That is, the guide member 16b is a member provided on, for example, the side surface on the Y1 direction side of the storage frame 15. The guide member 16b has, for example, a shape in which a central rod-shaped portion (hereinafter also referred to as the rod-shaped portion of the guide member 16b) protrudes in the Y2 direction by being curved (bent) at two points near both ends. Furthermore, the rod-shaped portion of the guide member 16b has a shape extending, for example, along the Z-axis direction, similar to the rod-shaped portion of the guide member 16a.

[0046] The rod-shaped members of guide member 16a support, for example, a side wall on the Y2 direction side of blade frame 12 in a state where the blade frame 12 can slide in the Z-axis direction. The rod-shaped members of guide member 16b support, for example, a side wall on the Y1 direction side of blade frame 12 in a state where the blade frame 12 can slide in the Z-axis direction. That is, guide member 16 holds blade frame 12 from the Y1 direction side and the Y2 direction side in a state where the blade frame 12 can slide in the Z-axis direction.

[0047] Specifically, the blade frame 12 slides along the Z-axis direction with, for example, a rod-shaped portion of the guide member 16a fitted into a groove portion (not shown) provided in the side wall (outer wall) on the Y2 direction side, and a rod-shaped portion of the guide member 16b fitted into a groove portion (not shown) provided in the side wall (outer wall) on the Y1 direction side.

[0048] As a result, in the water treatment device 10 of this embodiment, for example, it is possible to stabilize the position at which the blade frame 12 (each agitating blade 11 provided on the blade frame 12) performs its up-and-down reciprocating motion. Therefore, in the water treatment device 10, for example, it is possible to control the movement of the liquid to be treated accompanying the up-and-down reciprocating motion of the blade frame 12, and it is possible to efficiently agitate the liquid to be treated. Furthermore, the manager can more efficiently agitate the liquid to be treated by adjusting, for example, the number and attachment angle (the orientation of the agitating blade 11 in the short direction) of the agitating blades 11 on the blade frame 12.

[0049] In addition, in the water treatment device 10 of this embodiment, for example, the size and shape of the blade frame 12 and the blade frame 14 can be appropriately changed, and the number and intervals of the stirring blades 11 and the stirring blades 13 to be attached can be appropriately changed. Therefore, in the water treatment device 10, for example, the size, etc. (for example, the length in the Z-axis direction) of the blade frame 12 and the blade frame 14 and the number of the stirring blades 11 and the stirring blades 13 to be attached can be changed according to the depth of the tank 20 and the water level of the liquid to be treated in the tank 20. Therefore, in the water treatment device 10, for example, regardless of the depth of the tank 20 and the water level of the liquid to be treated in the tank 20, it is possible to sufficiently stir the liquid to be treated in the tank 20.

[0050] The water treatment device 10 may further include an adjustment device (not shown) capable of adjusting, for example, the mounting angle (the orientation of the short side of the agitating blade 11) of each agitating blade 11 in the blade frame 12 and the mounting angle (the orientation of the short side of the agitating blade 13) of each agitating blade 13 in the blade frame 14. Other configurations for sliding the blade frame 12 in the Z-axis direction will be described later.

[0051] Returning to FIG. 5, the guide member 17 includes, for example, guide member 17a and guide member 17, and supports (clamps) the blade frame 14 from the Y1 direction side and the Y2 direction side (horizontal direction) in a state where the blade frame 14 is slidable in the Z axis direction (vertical direction).

[0052] Specifically, as shown in Fig. 5, the guide member 17a is a member having, for example, one end (the end on the Z1 direction side) fixed to the rod-shaped member 15b and the other end (the end on the Z2 direction side) fixed to the rod-shaped member 15j. That is, the guide member 17a is a member provided on the side surface of the accommodation frame 15 on the Y2 direction side, similar to the guide member 16a. The guide member 17a has a shape in which, for example, two points near both ends are curved (bent) so that a central rod-shaped portion (hereinafter also referred to as the rod-shaped portion of the guide member 17a) protrudes toward the Y1 direction. Furthermore, the rod-shaped portion of the guide member 17a has a shape extending, for example, along the Z axis direction (i.e., the direction in which the blade frame 14 slides).

[0053] 5, the guide member 17b is a member having, for example, one end (the end on the Z1 direction side) fixed to the rod-shaped member 15d and the other end (the end on the Z2 direction side) fixed to the rod-shaped member 15l. That is, the guide member 17b is a member provided on the side surface of the storage frame 15 on the Y1 direction side, similar to the guide member 16b. The guide member 17b has, for example, a shape in which a central rod-shaped portion (hereinafter also referred to as the rod-shaped portion of the guide member 17b) protrudes in the Y2 direction by being curved (bent) at two points near both ends. Furthermore, the rod-shaped portion of the guide member 17b has a shape extending, for example, along the Z-axis direction, similar to the rod-shaped portion of the guide member 17a.

[0054] The rod-shaped members of guide member 17a support, for example, a side wall on the Y2 direction side of blade frame 14 in a state where the blade frame 14 can slide in the Z direction. The rod-shaped members of guide member 17b support, for example, a side wall on the Y1 direction side of blade frame 14 in a state where the blade frame 14 can slide in the Z direction. That is, guide member 17 holds blade frame 14 from the Y1 direction side and the Y2 direction side in a state where the blade frame 14 can slide in the Z direction.

[0055] Specifically, the blade frame 14 slides along the Z-axis direction with, for example, a rod-shaped portion of the guide member 17a fitted into a groove portion (not shown) provided in the side wall (outer wall) on the Y2 direction side, and a rod-shaped portion of the guide member 17b fitted into a groove portion (not shown) provided in the side wall (outer wall) on the Y1 direction side.

[0056] As a result, in the water treatment device 10 of this embodiment, for example, it is possible to stabilize the position at which the blade frame 14 (each agitating blade 13 provided on the blade frame 14) performs its up-down reciprocating motion, as in the case of the blade frame 12. Therefore, in the water treatment device 10, for example, it is possible to control the movement of the liquid to be treated accompanying the up-down reciprocating motion of the blade frame 14, and it is possible to efficiently agitate the liquid to be treated. Furthermore, the manager can, for example, adjust the number of agitating blades 13 on the blade frame 14 and the mounting angle (the orientation of the agitating blade 13 in the short direction), etc., to more efficiently agitate the liquid to be treated. Note that other configurations for sliding the blade frame 14 in the Z-axis direction will be described later.

[0057] Furthermore, in the water treatment device 10 of this embodiment, by having the blade frame 12 and the blade frame 14, it becomes possible, for example, to link the timing of the up-down reciprocating motion of the blade frame 12 with the timing of the up-down reciprocating motion of the blade frame 14. Therefore, in the water treatment device 10, it becomes possible, for example, to more accurately control the movement of the liquid to be treated that accompanies the up-down reciprocating motion of the blade frame 12 and the blade frame 14.

[0058] Moreover, the water treatment device 10 in this embodiment has a unit structure in which the blade frame 12 and the blade frame 14 are housed. Therefore, the manager can transport the water treatment device 10 assembled in a factory or the like to the flocculation basin 400 by a transport means such as a truck, and install the transported water treatment device 10 in the flocculation basin 400.

[0059] This enables the administrator to reduce the burden associated with installation work at the installation site (flocculation basin 400) of the water treatment device 10, for example, and enables the water treatment device 10 to be installed efficiently.

[0060] Specifically, the manager can manufacture the water treatment device 10 in a factory or the like in a state in which the blade frame 12 is clamped by the guide member 16 and the blade frame 14 is clamped by the guide member 17. Therefore, the manager does not need to perform work such as adjusting the positions at which the blade frames 12 and 14 perform their up and down reciprocating motions in the flocculation basin 400, and the water treatment device 10 can be installed efficiently.

[0061] [Configuration for performing up and down reciprocating motion of the blade frame 12 and the blade frame 14] Next, there will be described a configuration for performing the vertical reciprocating motion of the blade frame 12 and the blade frame 14. Fig. 6 is a diagram for explaining a configuration for performing the vertical reciprocating motion of the blade frame 12 and the blade frame 14.

[0062] 6, for example, a rope 31 (hereinafter also referred to as rope 31a) for suspending the blade frame 12 from the vertically upward side (Z1 direction side) is attached to the upper end (end on the Z1 direction side) of the blade frame 12. Also, for example, a rope 31 (hereinafter also referred to as rope 31b) for suspending the blade frame 14 from the vertically upward side (Z1 direction side) is attached to the upper end (end on the Z1 direction side) of the blade frame 14.

[0063] A sliding device 32 is disposed vertically above the blade frames 12 and 14 (Z1 direction side), for example, to pull up (slide in the Z1 direction) and pull down (slide in the Z2 direction) the ropes 31a and 31b. The sliding device 32 slides the blade frame 12 suspended by the rope 31a in the vertical direction (Z-axis direction) by, for example, pulling up and pulling down the rope 31a from above in the vertical direction (Z1 direction side). The sliding device 32 also slides the blade frame 14 suspended by the rope 31b in the vertical direction (Z-axis direction) by, for example, pulling up and pulling down the rope 31b from above in the vertical direction (Z1 direction side).

[0064] Specifically, the sliding device 32 may be, for example, a device such as an air cylinder that uses compressed air supplied from a compressor (not shown) to pull up and down the ropes 31a and 31b (hereinafter, also referred to as the first sliding device 32). The sliding device 32 may also be, for example, a device such as a motor that uses electricity to pull up and down the ropes 31a and 31b (hereinafter, also referred to as the second sliding device 32). Note that the sliding device 32 may include, for example, a sliding device that pulls up and down the ropes 31a and a sliding device that pulls up and down the ropes 31b separately.

[0065] That is, in the water treatment device 10 of this embodiment, for example, the blade frames 12 and 14 are slid while suspended vertically from above (Z1 direction side) to agitate the liquid to be treated in the tank 20. Therefore, in the water treatment device 10 of this embodiment, for example, the equipment (sliding device 32) for performing the up and down reciprocating motion of the blade frames 12 and 14 can be installed at a position higher than the water level of the liquid to be treated in the tank 20.

[0066] In this regard, for example, in a water treatment device that agitates the liquid to be treated by rotating a rotating shaft to which an agitating blade is attached (hereinafter also referred to as a water treatment device in a comparative example), equipment such as a bearing that supports the rotating shaft needs to be installed at a position lower than the water level of the liquid to be treated (in other words, at a position immersed in the liquid to be treated). Therefore, in the water treatment device in the comparative example, for example, when performing maintenance on the equipment required for agitating the liquid to be treated, the liquid to be treated stored in the tank needs to be drained, and the workload associated with the maintenance of the equipment increases.

[0067] In contrast, in the water treatment device 10 of this embodiment, for example, the sliding device 32 can be installed at a position higher than the water level of the liquid to be treated in the tank 20, so that even when performing maintenance on the sliding device 32, it is not necessary to drain the liquid to be treated in the tank 20. Therefore, in the water treatment device 10 of this embodiment, for example, it is possible to reduce the workload associated with maintenance of the sliding device 32.

[0068] The sliding device 32 may be fixed to, for example, the upper end (the end on the Z1 direction side) of the storage frame 15. Specifically, the sliding device 32 may be fixed to, for example, a plate-like member (not shown) hung across the rod-like members 15a and 15c described in Fig. 5, or a plurality of rod-like members (not shown). The sliding device 32 may be fixed to, for example, a plate-like member (not shown) hung across the rod-like members 15b and 15d described in Fig. 5, or a plurality of rod-like members (not shown).

[0069] As a result, in the water treatment device 10 of this embodiment, for example, the installation of the sliding device 32 can also be performed in a factory or the like. Therefore, the manager does not need to perform work associated with the installation of the sliding device 32 (for example, adjustment of the installation position of the sliding device 32, etc.) in the flocculation basin 400, and the installation of the water treatment device 10 can be performed more efficiently.

[0070] [Specific example of up-down reciprocating motion of the blade frame 12 and the blade frame 14] Next, a specific example of the up-down reciprocating motion of the blade frame 12 and the blade frame 14 will be described. Fig. 7 is a diagram for explaining a specific example of the up-down reciprocating motion of the blade frame 12 and the blade frame 14. Below, a case where the sliding device 32 is an air cylinder 32a will be described.

[0071] In the example shown in FIG. 7(A), the rope 31 is, for example, a connecting rope that connects the upper end (the end on the Z1 direction side) of the blade frame 12 and the upper end (the end on the Z1 direction side) of the blade frame 14. Hereinafter, the rope 31 is also referred to as a connecting rope 31 or a first connecting rope 31. The rope 31 is hung, for example, across a rotor 33a and a rotor 33b fixed vertically above (on the Z1 direction side) the blade frame 12 and the blade frame 14, thereby maintaining the blade frame 12 and the blade frame 14 in a lifted state. That is, each of the rotors 33a and 33b supports the rope 31 so as to be pivotable from, for example, the vertically downward side (on the Z2 direction side). Hereinafter, the rotors 33a and 33b are also collectively referred to simply as the rotor 33 or the first rotor 33.

[0072] Specifically, each of the rotating bodies 33a and 33b may be fixed to a plurality of rod-shaped members hung across the rod-shaped members 15a and 15c described in Fig. 5. Also, each of the rotating bodies 33a and 33b may be fixed to a plurality of rod-shaped members hung across the rod-shaped members 15b and 15d described in Fig. 5.

[0073] The air cylinder 32a has, for example, an air cylinder body 32a1 and a rod member 32a2. As shown in Fig. 7, a piston member 32a3 capable of sliding inside the air cylinder body 32a1 is attached to the rod member 32a2 at, for example, the end portion on the air cylinder body 32a1 side (the end portion on the X1 direction side). Hereinafter, of the internal space of the air cylinder body 32a1, a space on the X1 direction side of the piston member 32a3 is also referred to as a first space. Hereinafter, of the internal space of the air cylinder body 32a1, a space on the X2 direction side of the piston member 32a3 is also referred to as a second space.

[0074] In the air cylinder 32a, for example, as compressed air is supplied from a compressor (not shown) to the first space (compressed air is discharged from the second space), the piston member 32a3 slides in the X2 direction and the rod member 32a2 moves in the X2 direction. In the air cylinder 32a, for example, as compressed air is supplied from the compressor to the second space (compressed air is discharged from the first space), the piston member 32a3 slides in the X1 direction and the rod member 32a2 moves in the X1 direction.

[0075] 7(A), the rod member 32a2 is fixed to a predetermined location of the cord 31 via, for example, the fixing member 34. In other words, the fixing member 34 is fixed to, for example, the rod member 32a2 and a predetermined location of the cord 31. The fixing member 34 may be fixed to a predetermined location of the cord 31 by, for example, biting the predetermined location of the cord 31. The predetermined location here may be, for example, a location between the position where the cord 31 is wound around the rotor 33a and the position where the cord 31 is wound around the rotor 33b.

[0076] When compressed air is supplied from the compressor to the first space, the rod member 32a2 moves, for example, in the X2 direction as shown in FIG. 7(B), and moves the fixing member 34 in the X2 direction, and further moves the rope 31 toward the X2 direction.

[0077] 7(B), for example, the air cylinder 32a can pull up the blade frame 12 attached to the end of the rope 31 on the X1 direction side and pull down the blade frame 14 attached to the end of the rope 31 on the X2 direction side. Specifically, the air cylinder 32a can pull up the blade frame 12 and pull down the blade frame 14 by the length of the movement of the rope 31 toward the X2 direction side.

[0078] In addition, when compressed air is supplied from the compressor to the second space, the rod member 32a2 moves, for example, in the X1 direction as shown in FIG. 7(C), and moves the fixing member 34 in the X1 direction, and further moves the rope 31 toward the X1 direction.

[0079] 7(C), for example, the air cylinder 32a can pull down the blade frame 12 attached to the end of the rope 31 on the X1 direction side and can also pull up the blade frame 14 attached to the end of the rope 31 on the X2 direction side. Specifically, the air cylinder 32a can pull down the blade frame 12 and pull up the blade frame 14 by the length of the movement of the rope 31 toward the X1 direction side.

[0080] That is, in the water treatment device 10 of this embodiment, for example, the blade frames 12 and 14 are suspended by a rope 31 connecting the blade frames 12 and 14, and the vertical reciprocating motion of the blade frames 12 and 14 can be performed together by moving the rope 31 in the X-axis direction. Therefore, in the water treatment device 10, it is possible to reduce the energy required for the vertical reciprocating motion of the blade frames 12 and 14, compared to the case where the vertical reciprocating motion of the blade frames 12 and the vertical reciprocating motion of the blade frames 14 are performed separately. In other words, in the water treatment device 10, for example, compared to a case in which an air cylinder for performing the up and down reciprocating motion of the blade frame 12 and an air cylinder for performing the up and down reciprocating motion of the blade frame 14 are provided and these air cylinders are pressurized (depressurized) separately, it is possible to perform the up and down reciprocating motion of the blade frame 12 and the up and down reciprocating motion of the blade frame 14 together by pressurizing (depressurizing) the single air cylinder 32a, so that it is possible to suppress the energy required for the up and down reciprocating motion of the blade frame 12 and the blade frame 14.

[0081] In addition, in the water treatment device 10 of this embodiment, for example, by lowering the blade frame 14 at the timing when the blade frame 12 is raised, and by raising the blade frame 14 at the timing when the blade frame 12 is lowered, it becomes possible to generate a swirling flow (swirling flow on the XZ plane) of the liquid to be treated in the tank 20. Furthermore, in the water treatment device 10, for example, by alternately raising the blade frame 12 (lowering the blade frame 14) and lowering the blade frame 12 (raising the blade frame 14), it becomes possible to alternately generate swirling flows of different directions in the tank 20.

[0082] Therefore, in the water treatment device 10, for example, not only can a swirling flow of the liquid to be treated be generated in the tank 20, but the generated swirling flow can also be broken, and the liquid to be treated can be sufficiently agitated. Furthermore, in the water treatment device 10, unlike, for example, when the water treatment device in the comparative example is used, the direction of the swirling flow of the liquid to be treated is not constant, and therefore it is possible to suppress the occurrence of co-rotation of each agitator blade and the liquid to be treated.

[0083] In this manner, the water treatment device 10 in this embodiment has, for example, a first blade frame 12 supporting one or more first agitating blades 11, and a storage frame 15 that stores the first blade frame 12, and the storage frame 15 has a first guide portion 16 extending vertically, and the first blade frame 12 slides vertically along the first guide portion 16, and the liquid to be treated located within the storage frame 15 is agitated by the one or more first agitating blades 11.

[0084] Specifically, the water treatment system 1000 in this embodiment, for example, further has a tank 20 for storing the liquid to be treated, and the first blade frame 12 agitates the liquid to be treated stored in the tank 20 using one or more first agitating blades 11.

[0085] As a result, in the water treatment device 10 of this embodiment, it is possible to stabilize the position where the vertical reciprocating motion of the blade frame 12 is performed, for example. Therefore, in the water treatment device 10, it is possible to control the movement of the liquid to be treated that accompanies the vertical reciprocating motion of the blade frame 12, for example, and it is possible to efficiently agitate the liquid to be treated.

[0086] The water treatment device 10 in this embodiment also includes a first sliding device 32 that slides the first blade frame 12 in the vertical direction by using, for example, compressed air. The first sliding device 32 is installed above the first blade frame 12, for example.

[0087] As a result, in the water treatment device 10 of this embodiment, for example, even when performing maintenance work on the sliding device 32, it is not necessary to drain the liquid to be treated stored in the tank 20. Therefore, in the water treatment device 10 of this embodiment, it is possible to reduce the workload associated with maintenance of the sliding device 32, for example.

[0088] In addition, the water treatment device 10 in this embodiment has, for example, a second blade frame 14 that supports one or more second agitating blades 13, and the storage frame 15 houses the second blade frame 14 and has a second guide portion 17 extending vertically, and the second blade frame 14 slides vertically along the second guide portion 17, and the liquid to be treated in the storage frame 15 is agitated by the one or more second agitating blades 13.

[0089] And the water treatment device 10 in the present embodiment includes, for example, a first connecting cable 31 that connects the first blade frame 12 and the second blade frame 14, and is fixed above the first blade frame 12 and the second blade frame 14, and supports the first connecting cable 31 so as to be pivotable from the vertical downward direction, thereby suspending the first blade frame 12 and the second blade frame 14. One or more first rotators 33, and is installed above the first blade frame 12 and the second blade frame 14, and pivots the first connecting cable 31 with respect to one or more first rotators 33, thereby making the first blade frame 12 slide vertically upward and the second blade frame 14 slide vertically downward, and also sliding the second blade frame 14 vertically upward and sliding the first blade frame 12 vertically downward. And a second sliding device 32.

[0090] Thereby, in the water treatment device 10 in the present embodiment, for example, compared with the case of individually performing the vertical reciprocating motion of the blade frame 12 and the vertical reciprocating motion of the blade frame 14, the energy required for the vertical reciprocating motion of the blade frame 12 and the blade frame 14 can be suppressed.

[0091] [Water treatment device 40 in the second embodiment] Next, the configuration of the water treatment device 40 in the second embodiment will be described. FIG. 8 is a diagram for explaining the configuration of the water treatment device 40 in the first embodiment. Specifically, FIG. 8 is a perspective view for explaining the configuration of the water treatment device 40 in the first embodiment. Hereinafter, the differences from the water treatment device 10 in the first embodiment will be described.

[0092] The water treatment device 40 is, for example, a device fixed to the bottom of the tank 20 described with reference to FIG. 2 and the like. That is, the water treatment device 40 is, for example, a device used in place of the water treatment device 10 in the first embodiment.

[0093] 8, the water treatment device 40 houses, for example, one blade frame 42 (hereinafter also referred to as the third blade frame 42) to which one or more agitating blades 41 (hereinafter also referred to as the third agitating blade 41) are attached at intervals along the Z-axis direction. That is, the water treatment device 40 in this embodiment has only one blade frame 42, unlike the water treatment device 10 in the first embodiment, for example.

[0094] In the following description, it is assumed that three agitating blades 41 are attached to the blade frame 42, but the present invention is not limited to this. Specifically, the blade frame 42 may be attached with a number of agitating blades 41 other than three. That is, the blade frame 42 may be attached with a number of agitating blades according to, for example, the size of the tank 20 in the Z-axis direction (the depth of the tank 20), etc.

[0095] 8, the water treatment device 40 further includes, for example, a storage frame 45. The storage frame 45 (hereinafter also referred to as a first storage frame 45) is provided with, for example, a guide member 47 (hereinafter also referred to as a third guide portion 47).

[0096] Specifically, the storage frame 45 is a rectangular parallelepiped frame formed by twelve rod-shaped members (rod-shaped member 45a, rod-shaped member 45b, rod-shaped member 45c, rod-shaped member 45d, rod-shaped member 45e, rod-shaped member 45f, rod-shaped member 45g, rod-shaped member 45h, rod-shaped member 45i, rod-shaped member 45j, rod-shaped member 45k, and rod-shaped member 45l), similar to the case of the storage frame 15 in the first embodiment, for example.

[0097] The blade frame 42 is, for example, a hollow rectangular frame extending on the YZ plane. Each mixing blade 41 attached to the blade frame 42 is, for example, a hollow rectangular member extending on the XY plane, and forms a plate-shaped member 41a and a plate-shaped member 41b (hatched portion in FIG. 8) in which one side of the rectangular shape on the X1 direction side and one side of the rectangular shape on the X2 direction side each have a predetermined width. In addition, each mixing blade 41 is, for example, attached to a side wall (inner wall) on the Y2 direction side of the blade frame 42 at a part of one side of the rectangular shape on the Y1 direction side of the blade frame 42 at a part of one side of the rectangular shape on the Y1 direction side of the blade frame 42.

[0098] That is, each agitating blade 41 agitates the liquid to be treated, for example, at a plate-like member 41a and a plate-like member 41b that respectively form one side in the X1 direction and one side in the X2 direction of a rectangular shape.

[0099] The blade frame 42 shown in FIG. 8 has an open lower end (the end on the Z2 direction side), but is not limited to this. Specifically, the blade frame 42 may have a shape in which the lower end is not open, for example. Also, each agitating blade 41 in the example shown in FIG. 8 is attached to the lower side (Z2 direction side) in the hollow space of the blade frame 42, but is not limited to this. Specifically, each agitating blade 41 may be attached to the upper side (Z1 direction side) in the hollow space of the blade frame 42, for example.

[0100] The guide members 47 include, for example, guide members 47a and 47b, and support (sandwich) the blade frame 42 from the Y1 direction side and the Y2 direction side (horizontal direction) in a state where the blade frame 42 is slidable in the Z axis direction (vertical direction).

[0101] 8, the guide member 47a is, for example, a rod-shaped member having one end (the end on the Z1 direction side) fixed to the rod-shaped member 45b and the other end (the end on the Z2 direction side) fixed to the rod-shaped member 45j. That is, the guide member 47a is, for example, a member provided on the side surface of the storage frame 45 on the Y2 direction side.

[0102] 8, the guide member 47b is, for example, a rod-shaped member having one end (the end on the Z1 direction side) fixed to the rod-shaped member 45d and the other end (the end on the Z2 direction side) fixed to the rod-shaped member 45l. That is, the guide member 47b is, for example, a member provided on the side surface of the storage frame 45 on the Y1 direction side.

[0103] The guide member 47a supports, for example, a side wall on the Y2 direction side of the blade frame 42 in a state where the blade frame 42 is slidable in the Z axis direction. The guide member 47b supports, for example, a side wall on the Y1 direction side of the blade frame 42 in a state where the blade frame 42 is slidable in the Z axis direction. That is, the guide member 47 holds the blade frame 42 from the Y1 direction side and the Y2 direction side in a state where the blade frame 42 is slidable in the Z axis direction.

[0104] Specifically, the blade frame 42 slides along the Z-axis direction with, for example, guide member 47a fitted into a groove portion (not shown) provided in the side wall (outer wall) on the Y2 direction side, and guide member 47b fitted into a groove portion (not shown) provided in the side wall (outer wall) on the Y1 direction side.

[0105] As a result, in the water treatment device 40 of this embodiment, it is possible to stabilize the position at which the blade frame 42 (each agitating blade 41 provided on the blade frame 42) performs its up-and-down reciprocating motion, for example, as in the case of the water treatment device 10 of the first embodiment. Therefore, in the water treatment device 40, it is possible to control, for example, the movement of the liquid to be treated accompanying the up-and-down reciprocating motion of the blade frame 42, and it is possible to efficiently agitate the liquid to be treated. Furthermore, the administrator can, for example, adjust the number and mounting angle of the agitating blades 41 on the blade frame 42, thereby making it possible to more efficiently agitate the liquid to be treated.

[0106] In addition, in the water treatment device 40 of this embodiment, for example, as in the case of the water treatment device 10 of the first embodiment, the size and shape of the blade frame 42 can be appropriately changed, and the number of the stirring blades 41 attached and the attachment intervals can be appropriately changed. Therefore, in the water treatment device 40, for example, it is possible to change the size, etc. of the blade frame 42 (for example, the length in the Z-axis direction) and the number of the stirring blades 41 attached, etc., depending on the depth in the tank 20 and the water level of the liquid to be treated in the tank 20. Therefore, in the water treatment device 40, it is possible to sufficiently stir the liquid to be treated in the tank 20, regardless of the depth in the tank 20 and the water level of the liquid to be treated in the tank 20.

[0107] Furthermore, the water treatment device 40 in this embodiment has a unit structure in which the blade frame 42 is housed, for example, similarly to the case of the water treatment device 10 in the first embodiment. Therefore, the manager can transport the water treatment device 40 assembled in a factory or the like to the flocculation basin 400 by a transport means such as a truck, and install the transported water treatment device 40 in the flocculation basin 400. Therefore, the manager can reduce the load associated with the installation work at the installation site of the water treatment device 40 (the flocculation basin 400), for example, and can efficiently install the water treatment device 40.

[0108] [Configuration for performing up and down reciprocating motion of the blade frame 42 and the blade frame 44] Next, a description will be given of a configuration for performing up-down reciprocating motion of the blade frame 42 and the blade frame 44. Fig. 9 is a diagram for explaining a configuration for performing up-down reciprocating motion of the blade frame 42 and the blade frame 44. Hereinafter, the water treatment device 40 described in Fig. 8 will be referred to as water treatment device 40a, and the other water treatment device 40 arranged on the Y1 direction side of the water treatment device 40 described in Fig. 8 will also be referred to as water treatment device 40b.

[0109] 9, the water treatment device 40b has a storage frame 46 (hereinafter also referred to as a second storage frame 46) similar to the water treatment device 40a. The storage frame 46 stores, for example, one blade frame 44 (hereinafter also referred to as a fourth blade frame 44) to which one or more agitation blades 43 (hereinafter also referred to as a fourth agitation blade 43) are attached at intervals along the Z-axis direction. That is, the water treatment device 40b has only one blade frame 44 similar to the water treatment device 40a. Furthermore, the storage frame 46 is provided with a guide member 48 (hereinafter also referred to as a fourth guide portion 48) similar to the water treatment device 40a.

[0110] 9, a rope 51 (hereinafter also referred to as rope 51a) for suspending the blade frame 42 from the vertically upward side (Z1 direction side) is attached to the upper end (end on the Z1 direction side) of the blade frame 42 housed in the water treatment device 40a. Similarly, a rope 51 (hereinafter also referred to as rope 51b) for suspending the blade frame 44 from the vertically upward side (Z1 direction side) is attached to the upper end (end on the Z1 direction side) of the blade frame 44 housed in the water treatment device 40b.

[0111] Furthermore, above the blade frames 42 and 44 in the vertical direction (Z1 direction side), a sliding device 52 (hereinafter also referred to as a third sliding device 52) is disposed, which, for example, pulls up (slides in the Z1 direction) and pulls down (slides in the Z2 direction) the ropes 51a and 51b. The sliding device 52, for example, pulls up and pulls down the rope 51a from above in the vertical direction (Z1 direction side), thereby sliding the blade frame 42 suspended by the rope 51a in the vertical direction (Z-axis direction). The sliding device 52, for example, pulls up and pulls down the rope 51b from above in the vertical direction (Z1 direction side), thereby sliding the blade frame 44 suspended by the rope 51b in the vertical direction (Z-axis direction).

[0112] [Specific example of up-down reciprocating motion of the blade frame 42 and the blade frame 44] Next, a specific example of the up-down reciprocating motion of the blade frame 42 and the blade frame 44 will be described. Fig. 10 is a diagram for explaining a specific example of the up-down reciprocating motion of the blade frame 42 and the blade frame 44. Below, a case where the sliding device 52 is an air cylinder 52a will be described.

[0113] In the example shown in FIG. 10, the rope 51 is, for example, a connecting rope that connects the upper end (the end on the Z1 direction side) of the blade frame 42 and the upper end (the end on the Z1 direction side) of the blade frame 44. Hereinafter, the rope 51 is also referred to as a connecting rope 51 or a second connecting rope 51. The rope 51 is hung, for example, across the rotors 53a and 53b fixed vertically above (on the Z1 direction side) the blade frames 42 and 44, thereby maintaining the blade frames 42 and 44 in a lifted state. That is, each of the rotors 53a and 53b supports the rope 51 so as to be pivotable from, for example, the vertically downward side (on the Z2 direction side). Hereinafter, the rotors 53a and 53b are also collectively referred to simply as the rotor 53 or the second rotor 53.

[0114] Here, in the example shown in FIG. 10, the air cylinder 52a is fixed to a predetermined location of the rope 51 via a fixing member 54, similarly to the case of the air cylinder 32a in the first embodiment, for example.

[0115] Then, for example, similarly to the air cylinder 32a in the first embodiment, the air cylinder 52a moves the fixed member 54 in the Y2 direction, and further moves the rope 51 in the Y2 direction.

[0116] This makes it possible for the air cylinder 52a to, for example, pull up the blade frame 44 attached to the end of the rope 51 on the Y1 direction side and pull down the blade frame 42 attached to the end of the rope 51 on the Y2 direction side.

[0117] Also, the air cylinder 52a, for example, moves the fixed member 54 in the Y1 direction, and further moves the rope 51 in the Y1 direction, in the same manner as the air cylinder 32a in the first embodiment.

[0118] This makes it possible for the air cylinder 52a to, for example, pull down the blade frame 44 attached to the end of the rope 51 on the Y1 direction side, and to pull up the blade frame 42 attached to the end of the rope 51 on the Y2 direction side.

[0119] Thus, the water treatment device 40 in this embodiment has, for example, a third blade frame 42 supporting one or more third agitating blades 41, a first storage frame 45 housing the third blade frame 42, a fourth blade frame 44 supporting one or more fourth agitating blades 43, and a second storage frame 46 housing the fourth blade frame 44. The first storage frame 45 has, for example, a third guide portion 47 extending vertically, and the third blade frame 42 slides vertically along the third guide portion 47, and the liquid to be treated located in the first storage frame 45 is agitated by one or more third agitating blades 41. Furthermore, the second storage frame 46 has, for example, a fourth guide portion 48 extending vertically, and the fourth blade frame 44 slides vertically along the fourth guide portion 48, and the liquid to be treated located in the second storage frame 46 is agitated by one or more fourth agitating blades 43.

[0120] The water treatment device 40 in this embodiment includes, for example, a second connecting rope 51 connecting the third blade frame 42 and the fourth blade frame 44, one or more second rotating bodies 53 that are fixed above the third blade frame 42 and the fourth blade frame 44 and suspend the third blade frame 42 and the fourth blade frame 44 by supporting the second connecting rope 51 so that it can be pivoted from a vertically downward direction, and a third sliding device 52 that is installed above the third blade frame 42 and the fourth blade frame 44 and pivots the second connecting rope 51 relative to the one or more second rotating bodies 53, thereby sliding the third blade frame 42 vertically upward and the fourth blade frame 44 vertically downward, and also sliding the fourth blade frame 44 vertically upward and the third blade frame 42 vertically downward.

[0121] That is, in water treatment device 40 of the present embodiment, for example, as in the case of water treatment device 10 of the first embodiment, blade frame 42 and blade frame 44 are suspended by rope 51 connecting blade frame 42 and blade frame 44, and by moving rope 51 in the Y-axis direction, it is possible to perform both the up and down reciprocating motion of blade frame 42 and the up and down reciprocating motion of blade frame 44.

[0122] As a result, in the water treatment device 40 of this embodiment, it is possible to reduce the energy required for the up and down reciprocating motion of the blade frames 42 and 44, compared to the case in which the up and down reciprocating motion of the blade frames 42 and the up and down reciprocating motion of the blade frames 44 are performed separately, as is the case with, for example, the water treatment device 10 of the first embodiment.

[0123] Furthermore, in the water treatment device 40 of the present embodiment, for example, the number of parts for agitating the liquid to be treated can be reduced. Therefore, in the water treatment device 40, for example, the workload associated with the maintenance of the equipment can be further reduced.

[0124] [Water Treatment Device 40 in Modification] Next, a configuration of a modified example of the water treatment device 40 in the second embodiment (hereinafter, simply referred to as a modified example) will be described. Fig. 11 is a diagram for explaining the configuration of the water treatment device 40 in the modified example. Specifically, Fig. 11 is a perspective view for explaining the configuration of the water treatment device 40 in the modified example.

[0125] The water treatment device 40a and the water treatment device 40b described in FIG. 9 may be connected to each other to form a single water treatment device 40 (hereinafter, also referred to as water treatment device 40c) as shown in FIG.

[0126] In this case, the water treatment device 40c may have, for example, a guide member 47 provided on the Y2 direction side of the storage frame 45, a guide member 48 provided on the Y1 direction side of the storage frame 46, and a guide member 49 provided at the connecting portion between the storage frame 45 and the storage frame 46 (the Y1 direction side of the storage frame 45 and the Y2 direction side of the storage frame 46).

[0127] Specifically, the guide members 47 and 49 shown in FIG. 11 may, for example, support (clamp) the blade frame 42 from the Y1 direction side and the Y2 direction side (horizontal direction) in a state in which the blade frame 42 is slidable in the Z axis direction (vertical direction).

[0128] Furthermore, the guide members 47 and 48 shown in FIG. 11 may, for example, support (clamp) the blade frame 44 from the Y1 direction side and the Y2 direction side (horizontal direction) while allowing the blade frame 44 to slide in the Z axis direction (vertical direction).

[0129] That is, the guide member 49 shown in FIG. 11 may function, for example, not only as part of the guide member used for the sliding of the blade frame 42, but also as part of the guide member used for the sliding of the blade frame 44.

[0130] As a result, the water treatment device 40c in this modified example can, for example, further reduce the number of parts required to agitate the liquid to be treated. As a result, the water treatment device 40 can, for example, further reduce the workload associated with equipment maintenance.

[0131] [Experimental Results for the First and Second Embodiments] Next, experimental results for the first and second embodiments will be described. FIG. 12 is a diagram for explaining experimental results for the first and second embodiments. The horizontal axis in the graph shown in FIG. 12 corresponds to the moving speed (agitation speed) of each blade frame in the Z-axis direction. The vertical axis in the graph shown in FIG. 12 corresponds to the turbidity of the treated liquid after treatment in each water treatment device (hereinafter, also referred to as treated water turbidity). In the graph shown in FIG. 12, the circles correspond to the experimental results when a conventional water treatment device (paddle type water treatment device) not shown in the figure was used, the squares correspond to the experimental results when the water treatment device 10 in the first embodiment was used, and the triangles correspond to the experimental results when the water treatment device 40 in the second embodiment was used.

[0132] Specifically, the graph shown in Fig. 12 indicates that the stirring speed (stirring speed corresponding to the square marks) in the water treatment device 10 required to set the turbidity of the treated water to a specific value is lower than the stirring speed (stirring speed corresponding to the circle marks) in the conventional water treatment device. Similarly, the graph shown in Fig. 12 indicates that the stirring speed (stirring speed corresponding to the triangle marks) in the water treatment device 40 required to set the turbidity of the treated water to a specific value is lower than the stirring speed (stirring speed corresponding to the circle marks) in the conventional water treatment device. In other words, the graph shown in Fig. 12 indicates that, for example, the stirring speed (moving speed of the blade frame 12 and the blade frame 14) in the water treatment device 10 and the stirring speed (moving speed of the blade frame 42 and the blade frame 44) in the water treatment device 40 can be made slower than in the conventional water treatment device.

[0133] In this way, the water treatment device 10 of the first embodiment and the water treatment device 40 of the second embodiment can, for example, reduce the moving speed of each blade frame compared to that of conventional water treatment devices. Therefore, the water treatment device 10 and the water treatment device 40 can, for example, reduce wear on parts (e.g., sliding devices and rotating bodies) required for agitating the liquid to be treated. Furthermore, the water treatment device 10 and the water treatment device 40 can, for example, suppress destruction of flocs due to excessive agitation of the liquid to be treated.

[0134] Furthermore, in conventional water treatment devices (paddle-type water treatment devices), for example, depending on the rotation direction of the agitator blade, the rotation direction (movement direction) of the agitator blade may coincide with the flow direction of the liquid to be treated, which may increase the frequency of short-pass occurrence of flocs.

[0135] In contrast, in the water treatment device 10 of the first embodiment and the water treatment device 40 of the second embodiment, for example, the movement direction of each blade frame is vertical (Z-axis direction), which is different from the flow direction of the liquid to be treated (X-axis direction). Therefore, in the water treatment device 10 of the first embodiment and the water treatment device 40 of the second embodiment, it is possible to suppress the occurrence of short-passing of flocs more than in the case of using, for example, a conventional water treatment device.

[0136] Furthermore, in conventional water treatment devices (paddle-type water treatment devices), for example, a through-hole (not shown) is provided in the side wall of the flocculation basin due to the need to connect a rotating shaft (not shown) of an agitating blade to a motor (not shown) installed outside the flocculation basin. Therefore, in conventional water treatment devices, for example, there is a possibility that the liquid to be treated stored in the flocculation basin may leak out of the flocculation basin through the through-hole.

[0137] In contrast, in the water treatment device 10 of the first embodiment and the water treatment device 40 of the second embodiment, for example, there is no need to provide a through hole in the side wall of the flocculation basin 400. Therefore, in the water treatment device 10 of the first embodiment and the water treatment device 40 of the second embodiment, for example, it is possible to prevent water leakage to the outside of the flocculation basin 400. Furthermore, in the water treatment device 10 of the first embodiment and the water treatment device 40 of the second embodiment, for example, there is no need to provide a through hole in the side wall of the flocculation basin 400, so that it is possible to shorten the time required for installation work in the flocculation basin 400. [Explanation of symbols]

[0138] 10: Water treatment device 11: Mixing blade 12: Blade frame 13: Mixing blade 14: Wing frame 15: Storage frame 16: Guide section 17: Guide section 20: Tank 31: Cable 32: Sliding device 32a: Air cylinder 33: Rotating body 40: Water treatment device 41: Mixing blade 42: Blade frame 43: Mixing blade 44: Blade frame 45: Containment frame 46: Containment frame 47: Guide member 48: Guide member 49: Guide member 51: Rope 52: Sliding device 52a: Air cylinder 53: Rotating body 100: Grit chamber 200: Landing well 300: Mixing pond 400: Flocculation tank 500: Sedimentation tank 600: Filtration pond 700: Purified water pond 800: Water reservoir 1000: Water treatment system P: Pump T: Storage tank

Claims

1. A water treatment apparatus for stirring a liquid in a floc formation tank, comprising: a first blade frame that supports a plurality of first stirring blades attached at intervals; a housing frame that houses the first blade frame; the housing frame has a first guide portion extending in the vertical direction; the first blade frame slides vertically along the first guide portion, and stirs the liquid located within the housing frame by the plurality of first stirring blades. A water treatment apparatus.

2. Furthermore, it has a first sliding device that is installed above the first blade frame and slides the first blade frame in the vertical direction by using compressed air. The water treatment apparatus according to claim 1.

3. Furthermore, it has a second blade frame that supports a plurality of second stirring blades attached at intervals, the housing frame houses the second blade frame, has a second guide portion extending in the vertical direction, the second blade frame slides vertically along the second guide portion, and stirs the liquid within the housing frame by the plurality of second stirring blades. The water treatment apparatus according to claim 1.

4. Furthermore, a first connecting cable that connects the first blade frame and the second blade frame; one or more first rotators that are fixed above the first blade frame and the second blade frame and support the first connecting cable pivotably from vertically below, thereby suspending the first blade frame and the second blade frame; a second sliding device that is installed above the first blade frame and the second blade frame, and by pivoting the first connecting cable with respect to the one or more first rotators, slides the first blade frame upward vertically and slides the second blade frame downward vertically, and also slides the second blade frame upward vertically and slides the first blade frame downward vertically. The water treatment apparatus according to claim 3.

5. A water treatment apparatus for stirring a liquid in a floc formation tank, comprising: a third blade frame that supports a plurality of third stirring blades attached at intervals; a first housing frame that houses the third blade frame; a fourth blade frame that supports a plurality of fourth stirring blades attached at intervals; and a second housing frame that houses the fourth blade frame. The first housing frame has a third guide portion extending in the vertical direction, The third blade frame, slides vertically along the third guide portion, agitates the liquid located within the first housing frame by the plurality of third stirring blades, The second housing frame has a fourth guide portion extending in the vertical direction, The fourth blade frame, slides vertically along the fourth guide portion, A water treatment apparatus that agitates the liquid located within the second housing frame by the plurality of fourth stirring blades.

6. Furthermore, a second connecting cord that connects the third blade frame and the fourth blade frame, One or more second rotators that are fixed above the third blade frame and the fourth blade frame and support the second connecting cord so as to be pivotable from the vertically downward direction, thereby suspending the third blade frame and the fourth blade frame, Installed above the third blade frame and the fourth blade frame, by pivoting the second connecting cord with respect to the one or more second rotators, the third blade frame is slid upward vertically and the fourth blade frame is slid downward vertically, and also, the fourth blade frame is slid upward vertically and the third blade frame is slid downward vertically. The water treatment apparatus according to claim 5, having a third sliding device.

7. A water treatment system including the water treatment apparatus according to claim 1, furthermore, having a tank for storing the liquid, A water treatment system that agitates the liquid stored in the tank by the plurality of first stirring blades.

Images