JP2019025408A - Water treatment device, cooling tower and cooling tower system - Google Patents

Abstract

To provide water treatment device to prevent deformation and damage of components.SOLUTION: A protrusion 32 is fixed on a floor plate 30. The floor plate 30 is disposed beneath two or more bottom spherical electrodes 20B among a plurality of spherical electrodes laminated and disposed between a first electrode plate and a second electrode plate. The protrusion 32 is disposed at a height that interferes with the spherical electrodes 20 at a position lower than a center of two or more bottom spherical electrodes 20. The floor plate 30 and the protrusion 32 rotate together.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a water treatment apparatus for treating industrial wastewater, domestic wastewater and the like.

  In heat exchangers such as building air conditioners and district air conditioning facilities, domestic wastewater, industrial wastewater, and the like are used as cooling water for cooling a high-temperature heat medium. However, domestic wastewater, industrial wastewater, and the like include scales such as Ca and Mg. The scale adheres to the pipe and corrodes or clogs the pipe.

  As means for preventing this, a technique for electrolyzing domestic wastewater, industrial wastewater, etc. and removing scales is known. For example, Patent Document 1 discloses a device in which a spherical electrode is filled between two electrode plates in an electrolytic cell. When the electrolysis treatment is performed with such an apparatus, an insulating film such as a metal oxide is formed, the electric resistance of the continuum of the spherical electrodes is increased, and the electrolysis ability is lowered. Therefore, in this apparatus, each spherical electrode is agitated by rotating a rotating blade as an interference member extending in the radial direction while being spaced apart from a fixed circular floor plate around the central axis of the floor plate. . The spherical electrode that receives the force from the rotating blade due to interference with the rotating blade rotates or moves. Thus, the insulating films formed on the spherical electrodes are peeled off as the spherical electrodes rub against each other at different contact locations. Therefore, the number of times of cleaning the spherical electrode can be reduced.

JP 2016-123962 A

  In the electrolytic cell of Patent Document 1, a plurality of spherical electrodes are densely brought into contact with each other and stacked in a stacked manner on a floor plate that is fixedly arranged integrally with a side wall surface, and the surface on which the spherical electrodes are placed. The stirring is performed by rotating a blade independent of the (bottom surface). In other words, the first layer sphere placed on the bottom surface of the container is actively applied with a rotational force by a mechanism that moves independently of the bottom surface of the container, thereby moving the first layer sphere on the bottom surface of the container (revolution). ) And changing the position. In this case, when the rotating blade rotates, a large force may act on the rotating blade from the spherical electrode. As a result, there is a risk of deformation of the rotor blades and damage to the chain that is one of the drive means for the rotor blades.

  An object of the present invention is to provide a water treatment apparatus that is based on such a problem and that can prevent deformation of an interference body that interferes with a spherical electrode and damage to a driving means of the interference body. It is.

  The water treatment device of the present invention includes an electrolytic cell, a first electrode plate and a second electrode plate disposed so as to face each other in the electrolytic cell, and between the first electrode plate and the second electrode plate. Lower than the center of the plurality of spherical electrodes, the floor plate disposed under the two or more lowermost spherical electrodes of the plurality of spherical electrodes, and the two or more lowermost spherical electrodes An interference body disposed at a height that interferes with these spherical electrodes at a position, and a driving means for rotating the floor board integrated with the interference body around a vertical axis.

As a means for achieving the above object, the present inventor first made the floor plate a rotary type in place of the conventional electrolytic cell provided with the floor plate fixedly arranged integrally with the side wall surface. The central axis of rotation is the central axis of the electrolytic cell. With this configuration, the spherical electrodes were stacked and filled in the electrolytic cell, and the floor plate was rotationally driven by the driving means. As a result, it was found that the stacked and filled spherical electrodes did not rotate or revolve. That is, the spherical electrodes were not rubbed with each other, and the action of peeling off the insulating film could not be realized. Therefore, the rotating drive is performed by integrally providing an interference body disposed on the floor surface of the rotating plate at a position lower than the center of the lowermost spherical electrode so as to interfere with these spherical electrodes. It was. As a result, the spherical electrode that did not rotate when there was no interfering body provided the interfering body, so that the slidable spherical electrode climbed onto the interfering body and then rotated, and this rotation was performed in the surrounding and upper layer spherical electrodes. It was found that the effect of stirring can be achieved and the insulating film can be peeled off. Conventionally, many rotary vanes used as an interference body are, for example, inverted T-shaped or L-shaped. In the inverted T-shaped and L-shaped rotor blades, the vertical bar portion serves as a rotating shaft, and the horizontal bar portion serves as a blade body. Both are so-called cantilever shapes. For this reason, it is weak against moment and stress concentration, and there is a high risk of deformation and overload. The interference body of the present invention may be a protrusion having a sufficiently low height with respect to the spherical electrode diameter, and is extremely resistant to deformation because it has very few bent portions and corner portions.
Therefore, the frequency with which a large force acts on the interference body from the spherical electrode is reduced, and deformation of the interference body and damage to the driving means of the interference body can be prevented.

  In the water treatment apparatus of the present invention, it is preferable that the floor plate is a circular plate, and the length of the interference body in the radial direction of the floor plate is not less than ½ of the radius of the floor plate. Thereby, the number of the spherical electrodes that do not interfere with the interference body can be reduced, and the stirring effect of the plurality of spherical electrodes is enhanced.

  In the water treatment apparatus of the present invention, it is preferable that an interference surface of the interference body with the spherical electrode is inclined at an acute angle with respect to the floor plate. Thereby, it is easy for the spherical electrode to ride on the interference surface of the interference body.

  In the water treatment apparatus of the present invention, it is more preferable that a cross section in a direction perpendicular to the length direction of the interference body is circular. Thereby, it is easy for the spherical electrode to get over the interference body. Further, the boarding is performed smoothly and damage to the spherical electrode surface is prevented.

In the water treatment apparatus of the present invention, it is preferable that the maximum height roughness (Rz) of the spherical electrode and the interference body is 10 or more. As a result, the spherical electrode rolls over the surface of the interference body reliably and gets over the interference body.

  In the water treatment apparatus of the present invention, the floor board has at least a pair of attachment holes formed at intervals in the radial direction, and an end portion of the interference body extending in the radial direction of the floor board is formed in the attachment hole. It is preferable that it is press-fitted and fixed. Thereby, a processus | protrusion can be reliably fixed to a floor board.

  In the water treatment apparatus of the present invention, the friction coefficient and weight of the surface of the spherical electrode, the inner peripheral surface of the peripheral wall in the electrolytic cell, the friction coefficient of the surface of the floor board, and the rotational speed of the floor board are determined by the interference. In a state where the body is removed, it is preferable that the lowermost spherical electrode is determined so as not to rotate or revolve during most of the time during which the floor board is rotating.

  In the water treatment apparatus of the present invention, it is preferable that the rotation speed of the floor board is 0.5 RPM or more and 10 RPM or less. This is because if it is less than 0.5 RPM, stirring is not sufficiently performed, and if it exceeds 10 RPM, wear of the spherical electrode is accelerated.

  The cooling tower of the present invention is a cooling tower in which water treated by the above-described water treatment apparatus is cooled, and the water treatment apparatus is disposed in the cooling tower. Thereby, the space outside the cooling tower can be used effectively.

  The cooling tower system of this invention is equipped with the water treatment apparatus mentioned above. Thereby, many scale components can be efficiently removed by the water treatment apparatus.

  As described above, according to the present invention, it is possible to prevent deformation of the interference body and damage to the driving means of the interference body.

It is a mimetic diagram showing the whole cooling tower system composition concerning the embodiment of the present invention. It is the figure which looked at the inside of a water treatment apparatus from the front. It is the figure which looked at the inside of a water treatment apparatus from the upper part. It is an expansion perspective view of the floor board in which the projection concerning the present invention was formed. (A) is a schematic diagram inside the electrolytic cell when the floor plate is rotated in a state where electricity is supplied to each spherical electrode, and (b) is a case where the floor plate is rotated in a state where electricity is supplied to each spherical electrode. It is a schematic diagram in the electrolytic cell when there is no. (A)-(d) is the schematic seen from the upper direction and the side which show the positional relationship of a spherical electrode and protrusion by rotation of a floor board. (A)-(c) is the schematic seen from the side which shows the spherical electrode which autorotates by contacting a processus | protrusion. It is the enlarged view which looked at the state where the spherical electrode contacted the protrusion from the side. (A) is the figure which looked at the processus | protrusion which concerns on the modification 1 from upper direction, (b) is the figure which looked the processus | protrusion which concerns on the modification example 2 from the upper part, (c) is the processus | protrusion which concerns on the modification 3 It is the figure seen from.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the cooling tower system 50 includes a heat exchanger 1 provided in a building air conditioner, a district air conditioner, a cooling tower (cooling tower) 2 that cools water used in the heat exchanger 1, and a cooling tower. 2 is provided with a separation tank 3 for supplying water and a water treatment device 4.

  The heat exchanger 1 and the cooling tower 2 are connected by a first pipe 5 and a second pipe 6. The cooling tower 2 is connected to the separation tank 3 by a third pipe 7.

  In the heat exchanger 1, the cooling water sent from the cooling tower 2 exchanges heat with a thermal refrigerant having a temperature higher than that of the cooling water. After the heat exchange, the water whose temperature has risen passes through the first pipe 5 and is sent to the cooling tower 2 to be cooled. The cooled water is sent to the heat exchanger 1 again through the second pipe 6. Thus, water circulates in the order of heat exchanger 1 → first pipe 5 → cooling tower 2 → second pipe 6 → heat exchanger 1 → first pipe 5 →.

  In the cooling tower 2, the cooling water sent from the first pipe 5 is sprinkled from above. Most of the sprinkled cooling water is stored at the bottom of the cooling tower 2, but a part of it is warmed by the air sucked from the intake ports 2 a, 2 b. The remaining cooling water (water sprayed or stored in the bottom) is cooled by the latent heat (heat of vaporization) generated at this time. A part of the water in the cooling tower 2 is sent to the water treatment device 4 through the fourth pipe 8.

  The separation tank 3 is connected to the water treatment device 4 by a fifth pipe 9. As shown in FIGS. 2 and 3, the water treatment device 4 includes a housing 11, an electrolytic cell 12 housed in the housing 11, a motor 41 that is a part of driving means, and a reaction vessel 42. Yes. The electrolytic cell 12 and the reaction vessel 42 are partitioned by a partition plate 43. An opening 43 a is formed above the partition plate 43. The electrolytic cell 12 and the reaction vessel 42 communicate with each other through the opening 43a. A fourth pipe 8 shown in FIG. 1 is connected to the bottom of the electrolytic cell 12.

  Returning to FIGS. 2 and 3, the electrolytic cell 12 has a cylindrical shape with a closed lower end, and includes a bottom wall 13 of the housing 11 and a peripheral wall 14 rising from the bottom wall 13 in the vertical direction. In the electrolytic cell 12, a first electrode plate 16 and a second electrode plate 17, an insulating plate 18 that is an insulating member, a plurality of spherical electrodes 20, and a floor plate 30 are arranged.

  The first electrode plate 16 and the second electrode plate 17 are disposed on the floor plate 30 so as to face each other in the horizontal direction. When viewed from above, the first electrode plate 16 and the second electrode plate 17 are disposed adjacent to the inside of the peripheral wall 14 and have a substantially half-wheel shape extending along the inner surface of the peripheral wall 14. The first electrode plate 16 is disposed along the inner surface of the peripheral wall 14 away from the motor 41 of the electrolytic cell 12, and the second electrode plate 17 is disposed on the inner surface of the peripheral wall 14 closer to the motor 41 than the first electrode plate 16. Are arranged along. The first electrode plate 16 and the second electrode plate 17 are connected to a power source (not shown), and an electrolytic voltage of, for example, 4 V or more and 60 V or less is applied. When electricity is passed through the first electrode plate 16 and the second electrode plate 17, the first electrode plate 16 becomes a positive electrode and the second electrode plate 17 becomes a negative electrode.

  When viewed from above, the insulating plate 18 is disposed adjacent to the inside of the second electrode plate 17 and has a substantially half-ring shape extending along the inner surface of the second electrode plate 17. The insulating plate 18 is disposed between the second electrode plate 17 and the spherical electrode 20 </ b> C closest to the second electrode plate 17. An insulator such as vinyl chloride can be used for the insulating plate 18.

  The plurality of spherical electrodes 20 are stacked between the first electrode plate 16 and the second electrode plate 17, more precisely between the first electrode plate 16 and the insulating plate 18. Each spherical electrode 20 is disposed so as to be in contact with at least one of the first electrode plate 16, the insulating plate 18, or another spherical electrode 20. The lowermost spherical electrode 20 is disposed on the floor plate 30 adjacent to the floor plate 30. The plurality of spherical electrodes 20 have the same dimensions, but are not limited to this.

  The floor plate 30 has a disk shape arranged at the lower part of the electrolytic cell 12 and is supported so as to be rotatable around an axis 31. The floor plate 30 is disposed below the lowermost two or more spherical electrodes 20 among the plurality of spherical electrodes 20. The shaft 31 is connected to the motor 41 via the sprocket 45 and the chain 44, and the floor plate 30 rotates when the shaft 31 is driven by the motor 41. The shaft 31 and the belt 44 constitute a part of the driving means. When the motor 41 is driven, the floor board 30 rotates about the shaft 31. The stirring speed is, for example, not less than 0.5 RPM and not more than 10 RPM. This is because if it is less than 0.5 RPM, stirring is not sufficiently performed, and if it exceeds 10 RPM, wear of the spherical electrode is accelerated.

  As shown in FIG. 4, the peripheral edge of the floor board 30 is guided by support legs 35 fixed to the bottom wall 13. On the upper surface of the floor plate 30, four protrusions 32, which are four interference bodies provided at equal intervals in the circumferential direction, are arranged. In addition, a total of four through holes 36 are formed in the floor plate 30, one between each of the adjacent protrusions 32. The four through holes 36 are arranged on the same circumference and penetrate the floor plate 30 in the thickness direction.

  The protrusion 32 is a rib extending in the radial direction of the floor board 30 and protrudes from the surface 30a of the floor board 30 toward the spherical electrode 20 (upward in FIG. 4). The protrusion 32 is composed of an elongated linear body having a circular cross section along a direction orthogonal to the length direction. The length of the protrusion 32 in the radial direction of the floor plate 30 is about 2/3 of the radius of the floor plate 30. The protrusions 32 are fixed to the floor plate 30 by press-fitting both ends of the linear body bent downward toward the floor plate 30 into the mounting holes 34 of the floor plate 30. A pair of attachment holes 34 for fixing one protrusion 32 is formed in the floor board 30 with a space in the radial direction of the floor board 30. Thus, in this embodiment, since the protrusion 32 is fixed to the upper surface of the floor board 30, when the motor 41 is driven, the floor board 30 and the protrusion 32 rotate at the same speed in the same direction.

  When the floor board 30 rotates, the protrusion 32 is disposed at a height that interferes with these spherical electrodes 20 at a position lower than the center of the two or more lowermost spherical electrodes 20. Specifically, the diameter of the circular cross section of the protrusion 32 is preferably 1/10 to 1/4 with respect to the diameter of the spherical electrode 20, and in this embodiment, the diameter L1 of the spherical electrode 20 is 40 mm. The diameter L2 of the protrusion 32 is 5 mm (see FIG. 7A). If the plurality of spherical electrodes 20 include two or more types having different diameters, the protrusion 32 may be disposed at a height that interferes with the spherical electrode at a position lower than the center of the largest diameter spherical electrode. However, at this time, the protrusion 32 is preferably disposed at a height that interferes with the spherical electrode at a position lower than the center of the spherical electrode having the smallest diameter. The protrusion 32 is made of metal, and the maximum height roughness (Rz) of the surface is 10 or more.

  Next, a reaction centered on the electrolytic cell 12 when water is supplied to the electrolytic cell 12 and electricity is supplied to the first electrode plate 16 and the second electrode plate 17 will be described.

  First, when a part of the water in the cooling tower 2 shown in FIG. 1 is supplied to the bottom of the electrolytic cell 12 by the fourth pipe 8, the water flows upward through the through hole 36 of the floor plate 30. When the water surface reaches the opening 43a above the partition plate 43, the water in the electrolytic cell 12 overflows and flows from the opening 43a to the reaction vessel.

  In this state, electricity is passed through the first electrode plate 16 and the second electrode plate 17 to rotate the floor plate 30. Then, an electrolysis reaction is performed and an insulating film is formed on each spherical electrode 20, but the insulating film on the surface of the spherical electrode 20 is peeled off due to friction between adjacent spherical electrodes 20.

  In the said structure, since the electric current value changes according to water quality by arrange | positioning the insulating board 18 between the 2nd electrode board 17 and the spherical electrode 20, a scale can be removed reliably, suppressing the increase in electric power.

  Next, the state in the electrolytic cell 12 will be described with reference to FIGS. 5 (a) and 5 (b). 5 (a) and 5 (b) schematically show the spherical electrode 20, and the three spherical electrodes 20 (20A, 20B, 20C) in the lowermost layer will be described below. The spherical electrodes 20A, 20B, and 20C are arranged in order from the first electrode plate 16 toward the second electrode plate 17.

  The lowermost spherical electrode 20A is in contact with the first electrode plate 16 and the spherical electrode 20B, the spherical electrode 20B is in contact with the spherical electrode 20A and the spherical electrode 20C, and the spherical electrode 20C is in contact with the spherical electrode 20B and the insulating plate 18. Yes. Thus, the first electrode plate 16 (positive electrode) and the three spherical electrodes 20A, 20B, and 20C are electrically connected to form one large positive electrode. Note that the spherical electrode 20 </ b> C may not be in contact with the insulating plate 18.

  When the floor plate 30 does not rotate around the shaft 31, the insulating films formed on the first electrode plate 16 and all the spherical electrodes 20 increase with time (see FIG. 5B). While the floor plate 30 is rotating around the shaft 31, the spherical electrodes 20A, 20B, and 20C are moved or rotated by the action of the protrusion 32, so that the spherical electrodes 20A, 20B, and 20C are the first. The insulating film is peeled off by rubbing against the electrode plate 16 and the other spherical electrodes 20A, 20B, and 20C (see FIG. 5A).

  The movement of the spherical electrode 20 while the floor plate 30 is rotating will be described in detail. FIG. 6A to FIG. 6D show the positional relationship between the spherical electrode 20 and the protrusion 32 as the floor plate 30 rotates. However, in FIG. 6A to FIG. 6D, only one spherical electrode is representatively shown for convenience of explanation. In FIG. 6, a point P is a mark fixed to a predetermined position of the floor board 30. FIG. 7A to FIG. 7C are schematic diagrams showing forces acting on the middle spherical electrode 20B in the lowermost layer among the five spherical electrodes arranged on the floor plate 30 as an example.

  As shown in FIG. 7 (a), the spherical electrode 20B has a downward pressing force F1 due to the gravity of the upper spherical electrodes 20D and 20E, a pressing force F2 from the spherical electrodes 20A and 20C adjacent in the horizontal direction, and The vertical effect F3 from the floor board 30 acts. In the present embodiment, the lowermost spherical electrode 20 has a friction coefficient and a weight on the surface of the spherical electrode, so that it does not rotate or revolve for most of the time during which the floor plate 30 is rotating. The respective friction coefficients of the inner peripheral surface of the peripheral wall 14, the surface 30a of the floor plate 30, the inner peripheral surface of the first electrode plate 16, the inner peripheral surface of the insulating plate 18, the rotational speed of the floor plate 30, and the like are determined. Most of the time within the period in which the floor board 30 is rotating is 80% or more of the period in which the floor board 30 is rotating, and may be 90% of the time. The ball electrode 20 does not rotate or revolve, in other words, when the floor plate 30 is rotating, each ball electrode 20 moves relative to the surface 30a of the floor plate 30 in a circumferential direction. Means. That is, the spherical electrode 20B is stationary in the coordinate system provided outside the floor plate 30 (see FIGS. 6A to 6D and FIGS. 7A to 7C). The revolution mentioned here is a rotational motion around the shaft 31.

  When the floor plate 30 rotates counterclockwise as shown in FIG. 6A, the spherical electrode 20B sliding in the circumferential direction hits the protrusion 32 as shown in FIG. 6B. From this point, rotation of the spherical electrode 20 begins. Since the floor plate 30 continues to rotate, the spherical electrode 20B rides on the protrusion 32 as shown in FIG. At this time, the spherical electrode 20B rotates in the counterclockwise direction in the drawing. As shown in FIG. 7 (c), the rotation of the spherical electrode 20B generated when riding up causes the surrounding and upper layer spherical electrodes to move by the action of the surface frictional force with the spherical electrodes 20A, C, D, and E in contact with each other. Rotate. The rotation motion transmitted in this way further promotes rotation of the surrounding and upper spherical electrodes. Thereby, the spherical electrodes in contact with each other rub against each other, and the insulating film formed on the surface of the spherical electrode that is the positive electrode can be peeled off.

  Further, at this time, as shown in FIG. 8, the interference surface S1 of the protrusion 32 with the spherical electrode 20B is inclined at an acute angle θ with respect to the surface 30a of the floor board 30. This makes it easier for the spherical electrode 20 </ b> B to ride on the interference surface S <b> 1 of the protrusion 32. When the spherical electrode 20B rides on the protrusion 32, the spherical electrodes 20D and 20E disposed above the spherical electrode 20B are pushed up and move in the vertical direction and the circumferential direction of the floor plate 30. Accordingly, since the surrounding spherical electrodes 20 that rub against the spherical electrodes 20D and 20E also move in the vertical direction and the circumferential direction, the spherical electrode 20 disposed in the upper layer of the electrolytic cell 12 and the spherical electrode 20 disposed in the lower layer Can be replaced.

  When the floor plate 30 continues to rotate, the ball electrode 20B riding on the protrusion 32 descends over the protrusion 32 while rotating, and contacts the surface 30a of the floor plate 30 (see FIG. 6D).

[Features of water treatment apparatus of this embodiment]
The water treatment device 4 of this embodiment has the following features.

  On the surface of the floor plate 30, an interference body 32 that is disposed at a height that interferes with the spherical electrodes 20 at a position lower than the center of the lowermost spherical electrode is integrally provided. Since the interference body 32 is provided on the surface of the floor plate 30, the slidable spherical electrode 20 rides on the interference body 32 as the floor plate 30 rotates, and rotates at that time. By transmitting to 20, the stirring action is made possible. Conventionally, many rotary vanes used as an interference body are, for example, inverted T-shaped or L-shaped. This is a so-called cantilever shape. For this reason, it is weak against moment and stress concentration, and there is a high risk of deformation and overload. The interference body 32 of the present invention may be a protrusion having a sufficiently low height with respect to the spherical electrode diameter, and is extremely resistant to deformation because it has very few bent portions and corner portions. Therefore, the frequency with which a large force acts on the interference body from the spherical electrode 20 is reduced, and deformation of the interference body 32 and damage to the driving means 41, 44, 45 of the interference body 32 can be prevented.

  Further, in the water treatment device 4 of the present embodiment, the length of the protrusion 32 in the radial direction of the floor plate 30 is not less than ½ of the radius of the floor plate 30. Thereby, the number of the spherical electrodes 20 that do not interfere with the protrusions 32 can be reduced, and the stirring effect of the plurality of spherical electrodes 20 is enhanced.

  Moreover, in the water treatment device 4 of the present embodiment, the protrusion 32 is a protrusion 32 protruding upward from the floor board 20. Thereby, since the floor board 20 serves as the structure which supports the protrusion 32, the support structure of the protrusion 32 can be simplified.

  Further, as described above, in the water treatment device 4 of the present embodiment, the interference surface S1 of the protrusion 32 with the ball electrode 20 is inclined at an acute angle with respect to the floor plate 30. This makes it easier for the spherical electrode 20 to ride on the interference surface S <b> 1 of the protrusion 32. Therefore, an excellent stirring effect can be expected, and the protrusion 32 is less likely to be damaged. In particular, in the water treatment device 4 of the present embodiment, since the cross section in the direction orthogonal to the length direction of the protrusion 32 is circular, the spherical electrode 20 is extremely easy to get over the protrusion 32. Further, the boarding is performed smoothly and damage to the spherical electrode surface is prevented.

  In the water treatment device 4 of the present embodiment, the maximum height roughness (Rz) of the surfaces of the spherical electrode 20 and the protrusion 32 is 10 or more. Thereby, the spherical electrode 20 reliably rolls on the surface of the protrusion 32 and gets over the protrusion 32.

  Further, in the water treatment device 4 of the present embodiment, the end portion of the protrusion 32 extending in the radial direction of the floor board 30 is press-fitted and fixed in the mounting hole 34 of the floor board 30. Thereby, the protrusion 32 can be reliably fixed to the floor board 30.

  In the water treatment device 4 of the present embodiment, when the insulating plate 18 is disposed between the second electrode plate 17 and the plurality of spherical electrodes 20, the first electrode plate 16 and the plurality of spherical electrodes 20 are combined into one large electrode (positive electrode). ) An insulating film is formed on the first electrode plate 16 and the plurality of spherical electrodes 20, but by rotating the floor plate 30, each spherical electrode 20 is rotated or moved to be adjacent to the first electrode plate 16 and other spheres. It rubs against the electrode 20. Thereby, since the insulating film formed on the surface of the first electrode plate 16 and the surface of the spherical electrode 20 is removed, the number of electrode cleanings can be reduced.

  In the water treatment device 4 of the present embodiment, the rotational speed of the floor board 30 is 0.5 RPM or more and 10 RPM or less. This is because if it is less than 0.5 RPM, stirring is not sufficiently performed, and if it exceeds 10 RPM, wear of the spherical electrode is accelerated.

  In the cooling tower 2 of this embodiment, since the water treatment device 4 is arranged in the space inside the cooling tower, the space outside the cooling tower can be used effectively.

  In the cooling tower system of this embodiment, many scale components can be efficiently removed by the water treatment device 4.

  Next, a modified example of the protrusion 32 will be described. In the said embodiment, although the protrusion 32 extended in the radial direction of the floor board 30, and was arrange | positioned at equal intervals in the circumferential direction of the floor board 30, it is not limited to this.

<Modification 1>
As shown in FIG. 9A, in the first modification, the protrusions are two first protrusions 62 extending radially outward from the center portion of the floor board 61, and a direction perpendicular to the first protrusions 62. Two second protrusions 63 extending in the direction are provided. Each of the first protrusion 62 and the second protrusion 63 has an inner end extending to the vicinity of the shaft 31 and an outer end extending to the outer edge of the floor board 61. Further, the inner end of the first protrusion 62 and the inner end of the second protrusion 63 are connected. Thereby, the effect similar to the said embodiment can be acquired.

<Modification 2>
As shown in FIG. 9B, in the second modification, one protrusion 65 on a straight line extends in a direction orthogonal to the radial direction. The length of the protrusion 65 is slightly shorter than the radius of the floor board 66. In addition, as long as the protrusion 65 is not provided on the circumference centering on the axis | shaft 31 on the floor board 66, various structures are employable. Thereby, the freedom degree of design can be raised.

<Modification 3>
As shown in FIG. 9C, in the third modification, twelve protrusions 68 arranged in 4 rows and 3 columns protrude from the surface of the floor board 69 in a hemispherical shape. At this time, the number of protrusions 68 is not particularly limited.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not only by the above description of the embodiments but also by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  In the embodiment, the insulating plate 18 is disposed adjacent to the inner side of the second electrode plate 17 serving as a negative electrode. However, the present invention is not limited to this, and the insulating plate 18 may not be disposed. Even in this case, it is possible to obtain the same effect as in the above embodiment.

  In the above embodiment, both ends of the protrusion 32 are press-fitted and fixed in the mounting holes 34 of the floor board 30, but the method of attaching the protrusion 32 to the floor board 30 is not particularly limited.

  In the embodiment, the cross section in the direction orthogonal to the length direction of the protrusion 32 is circular, but is not limited thereto, and may be, for example, a polygonal or triangular cross section. The maximum height roughness (Rz) of the spherical electrode and / or the interference body may be less than 10.

2 Cooling tower 12 Electrolyzer 16 First electrode plate 17 Second electrode plate 20 Ball electrode 30 Floor plate 31 Axis (drive means)
32 Protrusion (interference body)
34 Mounting hole 41 Motor (drive means)
44 Chain (drive means)
45 Sprocket (drive means)
50 Cooling tower system

Claims (10)

An electrolytic cell;
A first electrode plate and a second electrode plate arranged to face each other in the electrolytic cell;
A plurality of spherical electrodes stacked between the first electrode plate and the second electrode plate;
A floor plate disposed under the two or more lowermost spherical electrodes among the plurality of spherical electrodes;
An interference body disposed at a height that interferes with these spherical electrodes at a position lower than the center of the two or more spherical electrodes in the lowermost layer;
Driving means for rotating the floor plate integrated with the interference body around a vertical axis;
A water treatment apparatus comprising: The floor plate is a circular plate,
The water treatment apparatus according to claim 1, wherein a length of the interference body in a radial direction of the floor board is ½ or more of a radius of the floor board.   The water treatment apparatus according to claim 1 or 2, wherein an interference surface of the interference body with the spherical electrode is inclined at an acute angle with respect to the floor board.   The water treatment apparatus according to any one of claims 1 to 3, wherein a cross section in a direction orthogonal to a length direction of the interference body is circular.   The water treatment device according to any one of claims 1 to 4, wherein a maximum height roughness (Rz) of the spherical electrode and the interference body is 10 or more. The floorboard has at least a pair of mounting holes formed at intervals in the radial direction,
The water treatment apparatus according to any one of claims 1 to 5, wherein an end portion of the interference body extending in a radial direction of the floor plate is press-fitted and fixed in the mounting hole.   The friction coefficient and weight of the surface of the spherical electrode, the inner peripheral surface of the peripheral wall of the electrolytic cell, the friction coefficient of the surface of the floor plate, and the rotational speed of the floor plate are the lowest layer in a state where the interference body is removed. The water treatment device according to any one of claims 1 to 6, wherein the ball electrode is determined so as not to rotate or revolve during most of the time period during which the floor board is rotating.   The water treatment apparatus according to any one of claims 1 to 7, wherein a rotational speed of the floor board is 0.5 RPM or more and 10 RPM or less. A cooling tower in which water treated by the water treatment device according to any one of claims 1 to 8 is cooled,
The cooling tower, wherein the water treatment device is arranged in the cooling tower.   A cooling tower system comprising the water treatment device according to claim 1.

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