JP2016123962A - Water treatment equipment, cooling tower and cooling tower system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently remove many scale components while suppressing the cost of water treatment equipment.SOLUTION: A first electrode plate 51 and a second electrode plate 52 are disposed in an electrolytic bath 42. A rotary vane 54 and a plurality of spherical electrodes 55 above the same are arranged between the first electrode plate 51 and the second electrode plate 52. Each spherical electrode 55 is arranged to be in contact with at least one of the first electrode plate 51, the second electrode plate 52, and other spherical electrodes 55. When a motor 43 rotates the rotary vane 54, each spherical electrode 55 rotates or moves to rub any one of the adjacent first electrode plate 51, second electrode plate 52, and other spherical electrodes 55. The first electrode plate 51 and the second electrode plate 52 are electrically connected through the plurality of spherical electrodes 55.SELECTED DRAWING: Figure 2

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.

  Then, the method of electrolyzing domestic wastewater, industrial wastewater, etc. and removing a scale is known (refer patent document 1). In Patent Document 1, aluminum ions are eluted from the electrode into water. Aluminum ions agglomerate with the scales in the water, producing aggregates (floc). The scale in the water is removed by levitating or sinking the aggregates and removing them.

  As the electrode area increases, the amount of aluminum ions eluted in the water increases, so the amount of scale removal increases. However, the larger the electrode, the larger the device. Therefore, in Patent Document 1, the total area of the electrodes is increased by arranging a plurality of electrode plates of a predetermined size.

JP2013-94740A

When current is passed through the electrode, hydroxide ions (OH ⁻ ) in water are attracted to the positive electrode. When O of OH ⁻ reacts with metal ions (aluminum ions) of the positive electrode, aluminum oxide (Al ₂ O ₃ ) is generated, and an Al ₂ O ₃ insulating film is formed on the positive electrode. When an insulating film is formed on the positive electrode, aluminum ions are hardly eluted from the positive electrode into water. In addition, the amount of electricity flowing in the water is reduced. As a result, the scale can hardly be removed. Therefore, the surface of the positive electrode is frequently cleaned to remove the insulating film.

  However, since there are a plurality of electrode plates, it takes time and labor to remove the insulating film. Moreover, since it is necessary to interrupt electrolysis every time it cleans, electrolysis efficiency is bad. Furthermore, since the electrodes are consumables, they need to be replaced frequently, but the cost increases if the number of electrodes is large.

  Accordingly, an object of the present invention is to provide an apparatus that can efficiently remove many scale components while suppressing cost.

  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. A plurality of electrode lumps arranged on the lower surface of the plurality of electrode lumps, a rotating blade disposed below the plurality of electrode lumps, and a motor for rotating the rotating wings, each of the plurality of electrode lumps including the first electrode plate, It arrange | positions so that at least 1 of the said 2nd electrode plate and another electrode block may be contact | connected, and the said 1st electrode plate and the said 2nd electrode plate are electrically connected by the said several electrode block.

  In the above configuration, by rotating the rotary blade, each electrode block rotates or moves and rubs against the adjacent first electrode plate, second electrode plate, and other electrode blocks. Thereby, since the insulating film formed on the surface of the first electrode plate or the surface of the second electrode plate that is the positive electrode and the surface of the electrode block is removed, cleaning of the electrode can be reduced. Conventionally, the electrolysis is interrupted at the time of cleaning, but the electrolysis can be hardly interrupted by reducing the cleaning. Therefore, since electrolysis can be continued for a long time, the efficiency is good. Furthermore, since the total area of the electrodes can be increased by the plurality of electrode masses, many scales can be removed without increasing the number of electrode plates. Therefore, many scale components can be removed at low cost.

  Alternatively, the water treatment apparatus of the present invention includes an electrolytic cell, a first electrode plate and a second electrode plate arranged to face each other in the electrolytic cell, the first electrode plate, and the A plurality of electrode lumps disposed between the second electrode plates; a rotor blade disposed below the plurality of electrode lumps; and a motor for rotating the rotor blades, wherein the first electrode plate is a positive electrode. And the second electrode plate is a negative electrode, and an insulating member is disposed between the second electrode plate and an electrode mass closest to the second electrode plate of the plurality of electrode masses, and the plurality of electrode masses Each is in contact with at least one of the first electrode plate and the other electrode mass, and the first electrode plate and the plurality of electrode masses are electrically connected.

In the above configuration, when the insulating plate is disposed between the second electrode plate and the plurality of electrode masses, the first electrode plate and the plurality of electrode masses become one large electrode (positive electrode). An insulating film of Al ₂ O ₃ is formed on the first electrode plate and the plurality of electrode masses, but by rotating and rotating the rotor blades, each electrode mass rotates and moves to the adjacent first electrode plate and other electrode masses. Rub with the electrode mass. Thereby, since the insulating film formed on the surface of the first electrode plate and the surface of the electrode block is removed, the number of electrode cleanings can be reduced. Conventionally, the electrolysis is interrupted at the time of cleaning, but the electrolysis can be hardly interrupted by reducing the cleaning. Therefore, since electrolysis can be continued for a long time, the efficiency is good. Furthermore, since the total surface area of the electrodes can be increased by the plurality of electrode masses, many scales can be removed without increasing the number of electrode plates. Therefore, many scale components can be removed at low cost.
Further, when a current is passed through the first electrode plate and the second electrode plate at a constant voltage, the current value changes depending on the water quality (scale amount). Therefore, the scale can be reliably removed while suppressing an increase in power.

  In the above configuration, the plurality of electrode masses are preferably spherical. The spherical electrode mass is easy to rotate and is easy to contact the first electrode plate, the second electrode plate and other electrode masses. For this reason, the insulating film on the electrode surface is easily removed. Therefore, cleaning of the electrode surface can be further reduced.

  The cooling tower of this invention is a cooling tower (cooling tower) in which the water processed with the water treatment apparatus mentioned above is cooled, It is preferable that the said water treatment apparatus is arrange | positioned in the said cooling tower. By disposing the water treatment device in the space inside the cooling tower, the space outside the cooling tower can be used effectively.

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

  According to the present invention, the electrode mass rubs against the first electrode plate or the second electrode plate and also rubs against other electrode masses, so that the surface of the first electrode plate that becomes the positive electrode or the surface of the second electrode plate and the electrode mass. The insulating film formed on the surface can be removed. As a result, the cleaning of the electrode surface can be reduced, so that the electrolysis can be continued. Moreover, since the total area of the electrodes can be increased by the electrode block, many scales can be removed at low cost without increasing the number of electrode plates.

It is a mimetic diagram showing the whole cooling tower system composition concerning a 1st embodiment of the present invention. (A) It is the figure which looked at the inside of a water treatment apparatus from the front, (b) is the figure which looked at the inside of a water treatment apparatus from upper direction. (A) And (b) is a schematic diagram in the electrolytic cell when electricity flows, (c) is a schematic diagram in the electrolytic cell when current flows in the opposite direction to (a) and (b). It is. (A) And (b) is a schematic diagram in the electrolytic vessel which concerns on 2nd Embodiment of this invention. It is a figure which shows the internal structure of the water treatment apparatus which concerns on 3rd Embodiment of this invention. It is a schematic diagram which shows the whole structure of the cooling tower system which concerns on 4th Embodiment of this invention. It is a perspective view which shows the internal structure of the cooling tower of FIG. It is a one part front view in the cooling tower of FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS.

[First Embodiment]
As shown in FIG. 1, the cooling tower system 100 includes a heat exchanger 1 provided in a building air conditioner, a district air conditioner, and the like, 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 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.

  In addition, the cooling tower 2 is replenished with water corresponding to the amount of the evaporated and scattered cooling water from the separation tank 3 through the third pipe 7. The replenished water is stored at the bottom of the cooling tower 2.

  The separation tank 3 is connected to the water treatment device 4 by a fifth pipe 9. As shown in FIGS. 2A and 2B, the water treatment device 4 includes a housing 41, an electrolytic bath 42, a motor 43, and a reaction bath 44 housed in the housing 41. . The electrolytic bath 42 and the reaction bath 44 are partitioned by a partition plate 45. An opening 45 a is formed above the partition plate 45. The electrolytic tank 42 and the reaction tank 44 communicate with each other through the opening 45a. A fourth pipe 8 shown in FIG. 1 is connected to the bottom of the electrolytic cell 42.

  As shown in FIG. 2A, in the electrolytic cell 42, a first electrode plate 51 and a second electrode plate 52 are arranged so as to face each other in the horizontal direction. The first electrode plate 51 and the second electrode plate 52 are disposed on the floor plate 53. A plurality of through holes 53 a are formed in the floor plate 53. Between the first electrode plate 51 and the second electrode plate 52, a rotary blade 54 and a plurality of spherical ball electrodes (electrode lump) 55 are arranged above the floor plate 53 and above the rotary blade 54. .

  The first electrode plate 51 and the second electrode plate 52 are connected to a power source (not shown). The electrolytic voltage is, for example, 12V or more and 60V or less.

  The first electrode plate 51, the second electrode plate 52, and the spherical electrode 55 are made of aluminum or an alloy containing aluminum. It is preferable that magnesium is contained in the 1st electrode plate 51, the 2nd electrode plate 52, and the spherical electrode 55 from the point of rust prevention. For the spherical electrode 55, for example, SUS can be used.

  A rod 60 extending upward is fixed at the center of the rotor blade 54. When the motor 43 is driven, the rotary blade 54 rotates around the rod 60. The stirring speed is, for example, not less than 0.5 RPM and not more than 10 RPM.

  Each spherical electrode 55 is disposed in contact with at least one of the first electrode plate 51, the second electrode plate 52, or another spherical electrode 55. The size and number of the spherical electrodes 55 are not particularly limited. For example, 100 to 300 spherical electrodes having a diameter of 40 mm to 60 mm may be arranged in a 46 L electrolytic cell.

  A part of the water in the cooling tower 2 shown in FIG. 1 is supplied to the electrolytic cell 42 from the bottom from the fourth pipe 8. The water flows upward through the through hole 53a of the floor plate 53. When the water surface reaches the opening 45a above the partition plate 45, the water in the electrolytic cell 42 overflows and flows from the opening 45a to the reaction tank 44.

  Here, when electricity is passed through the first electrode plate 51 and the second electrode plate 52 and the rotor blades 54 are rotated, the following reaction occurs.

Aluminum ions (Al ³⁺ ) are eluted from the first electrode plate 51, the second electrode plate 52, and the spherical electrode 55 into water. Al ³⁺ reacts with water hydroxide ions (OH ⁻ ) to produce Al (OH) ₃ . Water containing Al (OH) ₃ overflows from the opening 45 a and flows into the reaction tank 44. In the reaction tank 44, Al (OH) ₃ and scale components (Ca ²⁺ , Mg ^2+, etc.) in water aggregate to produce aggregates (floc). The water containing the aggregate is sent to the separation tank 3 through the fifth pipe 9 (see FIG. 1), and is separated into the aggregate and water in the separation tank 3. Aggregates are collected by floating or settling in the separation tank 3. Water is supplied to the cooling tower 2 through the third pipe 7. Water contains almost no scale.

  Here, the state in the electrolytic cell 42 is demonstrated, referring FIG. 3 (a), FIG.3 (b), and FIG.3 (c). 3 (a), 3 (b) and 3 (c) schematically show the spherical electrode 55, and the lowermost spherical electrode 55 (55A, 55B, 55C) will be described below. The spherical electrodes 55A, 55B, and 55C are arranged in order from the first electrode plate 51 toward the second electrode plate 52.

  When a current is passed through the first electrode plate 51 and the second electrode plate 52, the first electrode plate 51 becomes a positive electrode and the second electrode plate 52 becomes a negative electrode, as shown in FIG. The lowermost ball electrode 55A is in contact with the first electrode plate 51 and the ball electrode 55B, the ball electrode 55B is in contact with the ball electrode 55A and the ball electrode 55C, and the ball electrode 55C is in contact with the ball electrode 55B and the second electrode plate 52. doing. As a result, the first electrode plate 51 and the second electrode plate 52 are electrically connected by the three spherical electrodes 55A, 55B, and 55C (see the dotted arrows in FIG. 3A).

  In the spherical electrode 55A, a portion in contact with the first electrode plate 51 is a positive electrode, and a portion in contact with the spherical electrode 55B is a negative electrode. In the spherical electrode 55B, a portion in contact with the spherical electrode 55A is a positive electrode, and a portion in contact with the spherical electrode 55C is a negative electrode. In the spherical electrode 55C, a portion in contact with the spherical electrode 55B is a positive electrode, and a portion in contact with the second electrode plate 52 is a negative electrode.

  In addition, when the rotary blade 54 rotates around the rod 60, the spherical electrodes 55A, 55B, and 55C rotate and move, and the first electrode plate 51, the second electrode plate 52, and the other spherical electrodes 55A. , 55B, 55C and rub each other at different contact points. As a result, the positive and negative positions of the spherical electrodes 55A, 55B, and 55C are constantly changing.

Hydroxide ions (OH ⁻ ) of water are attracted to the portions of the first electrode plate 51 (positive electrode) and the positive electrodes of the spherical electrodes 55A, 55B, and 55C. When OH ⁻ reacts with Al of the first electrode plate 51, aluminum hydroxide (Al ₂ O ₃ ) is generated (see FIG. 3B). Normally, as shown in FIG. 3B, an insulating film of Al ₂ O ₃ is formed on the first electrode plate 51 (positive electrode) and the portions of the spherical electrodes 55A, 55B, and 55C that are positive electrodes. In the embodiment, the spherical electrodes 55A, 55B, and 55C are rubbed against the first electrode plate 51, the second electrode plate 52, and other spherical electrodes to form the first electrode plate 51 (positive electrode) and the spherical electrodes 55A, 55B, and 55C. The Al ₂ O ₃ insulating film is peeled off.

  Since the spherical electrodes 55A, 55B, and 55C always rotate and move while the rotary blade 54 is rotated, even if an insulating film is formed on the first electrode plate 51 and the spherical electrodes 55A, 55B, and 55C. Peel off immediately.

In addition, although the scale components (Ca ²⁺ , Mg ^2+, etc.) in water are deposited on the second electrode plate 52 of the negative electrode, when the current is passed in the opposite direction, the second electrode plate 52 becomes the positive electrode, and the first electrode When the plate 51 becomes a negative electrode (see FIG. 3C), the scale deposited on the second electrode plate 52 is eluted into water and deposited on the first electrode plate 51 (negative electrode).

On the second electrode plate 52 (positive electrode), an insulating film of Al ₂ O ₃ is formed by the same phenomenon as the first electrode plate 51 described above, but the spherical electrode 55C is rubbed against the second electrode plate 52. As a result, the insulating film formed on the second electrode plate 52 is peeled off.

An Al ₂ O ₃ insulating film is also formed on the portion of the spherical electrode 55 that has become the positive electrode. The spherical electrode 55 is at least one of the first electrode plate 51, the second electrode plate 52, and the other spherical electrodes 55. By rubbing against each other, the insulating film is peeled off.

  Therefore, almost no insulating film remains on the first electrode plate 51 and the spherical electrode 55 while the rotary blade 54 is rotated.

Note that the scale components (Ca ²⁺ , Mg ²⁺ ) deposited on the first electrode plate 51 (negative electrode) are eluted in water by changing the direction of the current and deposited on the second electrode plate 52 (positive electrode). (FIG. 3 (a)).

As described above, according to this embodiment, the following effects are obtained.
When an electric current is passed through the first electrode plate 51 and the second electrode plate 52, an insulating film of Al ₂ O ₃ is formed on the electrode that has become the positive electrode, but by rotating the rotor blade 54 in the electrolytic cell 42, Each spherical electrode 55 rotates and moves to rub against the adjacent first electrode plate 51, second electrode plate 52, and other spherical electrodes 55. As a result, the insulating film is peeled off, so that almost no insulating film remains on the electrode surface. Conventionally, in order to remove the insulating film from the electrode, the electrolysis is interrupted and the electrode surface is cleaned. However, in this embodiment, the electrode surface needs to be hardly cleaned, so that the electrolysis can be continued for a long period of time. Therefore, efficiency is good. Further, although only two first electrode plates 51 and second electrode plates 52 are arranged in the electrolytic cell 42, the total area of the electrodes is increased by the plurality of spherical electrodes 55. Thereby, many scales can be removed at low cost.

  Further, since the spherical electrode 55 is spherical, it is easy to rotate and easily contact with the first electrode plate 51, the second electrode plate 52 and the other spherical electrode 55. Therefore, the insulating films on the surfaces of the first electrode plate 51, the second electrode plate 52, and the spherical electrode 55 are easily removed. Therefore, cleaning of the electrode surface can be further reduced.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in that an insulating plate (insulating member) 152 is disposed next to the second electrode plate 52. In addition, about the structure same as 1st Embodiment mentioned above, the same code | symbol is used and the description is abbreviate | omitted suitably.

  The insulating plate 152 is disposed between the second electrode plate 52 and the spherical electrode 55 </ b> C closest to the second electrode plate 52. An insulator such as vinyl chloride can be used for the insulating plate 152.

  The lowermost spherical electrode 55A is in contact with the first electrode plate 51 and the spherical electrode 55B, the spherical electrode 55B is in contact with the spherical electrode 55A and the spherical electrode 55B, and the spherical electrode 55C is in contact with the spherical electrode 55B and the insulating plate 152. Yes. As a result, the first electrode plate 51 (positive electrode) and the three spherical electrodes 55A, 55B, and 55C are electrically connected to form one larger positive electrode (see the thick arrow in FIG. 3A). The spherical electrode 55C may not always be in contact with the insulating plate 152.

As a result, an insulating film of Al ₂ O ₃ is normally formed on the first electrode plate 51 and all the spherical electrodes 55 (see FIG. 4B), but the rotating blades 54 rotate around the rod 60. During this time, the spherical electrodes 55A, 55B, and 55C move or rotate so that the spherical electrodes 55A, 55B, and 55C rub against the first electrode plate 51 and the other spherical electrodes 55A, 55B, and 55C. The insulating film is peeled off.

In addition, when a current is supplied so that the voltage is constant, the current value changes depending on the water quality. For example, when the water quality is poor, since there are many scale components (Ca ²⁺ , Mg ²⁺ ) in the water, the electrical resistance value in the water is reduced and the electrical conductivity is increased. In this case, since a large current flows, the amount of Al ³⁺ eluted increases and a large amount of Al ₂ O ₃ is generated, so that a large amount of aggregates with scale components are generated. For this reason, many scales can be removed. On the other hand, when the water quality is not so bad, since there are few scale components (Ca ²⁺ , Mg ²⁺ ) in the water, the electrical resistance value in the water increases and the electrical conductivity decreases. In this case, since the amount of elution of Al ³⁺ is small and Al ₂ O ₃ is not generated so much by reducing the current value, the scale can be sufficiently removed even with this amount because there are few scale components in water.

  From the above configuration, the second embodiment can perform electrolysis for a long time as in the first embodiment. Moreover, many scales can be removed at low cost. Furthermore, by disposing the insulating plate 152 between the second electrode plate 52 and the spherical electrode 55, the current value changes according to the water quality, so that the scale can be reliably removed while suppressing an increase in power. Thereby, it can suppress that the amount of electricity increases unnecessarily.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the first embodiment in the configuration inside the housing. In addition, about the structure same as 1st Embodiment mentioned above, the same code | symbol is used and the description is abbreviate | omitted suitably.

  As shown in FIG. 5, the water treatment apparatus 204 includes a housing 241, a water tank 240 and a reaction tank 244 housed in the housing 241. The water tank 240 and the reaction tank 244 are adjacent to each other and are partitioned by a partition plate 245. In the water tank 240, a tank 250 and an electrolytic tank 242 are arranged on the tank 250. A motor 243 that rotates the rotary blade 54 is disposed above the electrolytic cell 242.

  Openings 242 a and 242 b are formed on the side of the upper end of the electrolytic cell 242. The water tank 240 and the electrolytic tank 242 communicate with each other through the openings 242a and 242b. Seventh pipes 261 and 262 are connected to the lower end of the electrolytic cell 242. The seventh pipes 261 and 262 are connected to the separation tank 3 shown in FIG.

  A supply port for the pipe 270 is disposed at the upper end of the water tank 240. Water is supplied from the pipe 270 to the water tank 240.

  An opening 245 a is formed in the partition plate 245. The water tank 240 and the tank 250 communicate with each other through the opening 245a.

The electrolytic cell 242 is supplied with water that has passed through the seventh pipes 261 and 262 from the bottom. This water is water supplied from the separation tank 3 shown in FIG. 1, and the scale is almost removed. When electricity is passed through the first electrode plate 51 and the second electrode plate 52 in the electrolytic cell 242, aluminum ions (Al ³⁺ ) are generated from the first electrode plate 51 or the second electrode plate 52 and the spherical electrode 55 that have become positive electrodes. Elute in water. Al ³⁺ reacts with water hydroxide ions (OH ⁻ ) to produce Al (OH) ₃ . The water containing Al (OH) ₃ flows from the openings 242a and 242b of the electrolytic cell 242 to the water cell 240 and is mixed with the water in the water cell 240. These waters overflow from the opening 240 a of the water tank 240 and flow into the tank 250. In the tank 250, Al (OH) ₃ and scale components (Ca ²⁺ , Mg ^2+, etc.) in water aggregate.

  From the above configuration, according to the third embodiment, as in the first embodiment, electrolysis can be performed continuously for a long time. Moreover, many scales can be removed at low cost. Furthermore, since water can be processed in the water tank 240 larger than the electrolytic tank 242, a larger amount of water can be processed than the water treatment apparatus 4 of the first embodiment.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIGS. The fourth embodiment is different from the first embodiment in that a water treatment device 304, a reaction tank 344, and a separation tank 3 are arranged in the cooling tower 302. In addition, about the structure same as 1st Embodiment mentioned above, the same code | symbol is used and the description is abbreviate | omitted suitably.

  As shown in FIG. 6, the cooling tower system 300 includes a heat exchanger 1 and a cooling tower (cooling tower) 302.

  As shown in FIG. 7, in the cooling tower 302, a water treatment device 304, a reaction tank 344 and a separation tank 3 are arranged side by side. The water treatment device 304 and the reaction tank 344 are connected by a sixth pipe 346 as shown in FIG. The reaction tank 344 and the separation tank 3 are connected by a fifth pipe 309.

  In the water treatment device 304, an electrolytic cell 42 and a motor 343 are arranged. The rotor blades 54 are rotated by the motor 343. The bottom of the electrolytic cell 42 is connected to the outside by the fourth pipe 8.

Al (OH) ₃ is generated in the electrolytic bath 42, and water containing Al (OH) ₃ is supplied to the reaction bath 344 through the sixth pipe 346. In the reaction tank 344, Al (OH) ₃ and scale components (Ca ²⁺ , Mg ^2+, etc.) in water aggregate. The water in the reaction tank 344 is sent to the separation tank 3 through the fifth pipe 309 and separated into water and agglomerates. The separated water contains almost no scale. This water is sent to a cooling device (not shown) arranged in the cooling tower 302 shown in FIG.

  From the above configuration, the fourth embodiment can perform electrolysis continuously for a long time as in the first embodiment. Moreover, many scales can be removed at low cost. Furthermore, by disposing the water treatment device 304, the reaction tank 344, and the separation tank 3 in the space inside the cooling tower 302, the space outside the cooling tower 302 can be used effectively.

  Next, examples of the present invention will be described.

Example 1
The water treatment apparatus provided with the electrolytic layer shown in FIG. 5 was continuously operated for 60 days. Experimental conditions are shown below.
-Wastewater treatment flow rate: 3 ton / hour-Electrolyzer: Capacity 46L
Stirring speed 1 RPM
・ Spherical electrode: Size φ60mm
Quantity 150 pieces ・ Electrolytic voltage: 36V-60V

  In Example 1, four electrolytic cells (a first electrolytic cell, a second electrolytic cell, a third electrolytic cell, and a fourth electrolytic cell) were used. Drainage was supplied to two electrolytic cells (first electrolytic cell and second electrolytic cell) at 1.5 ton / hour for electrolysis. Then, the water processed with the 1st electrolytic cell and the 2nd electrolytic cell was supplied to the 3rd electrolytic cell and the 4th electrolytic cell, respectively, and after electrolysis, it sent to the reaction tank.

  In the water that passed through the separation tank, the total hardness was reduced by 28% and the ionic silica was reduced by 17% compared to the waste water before being supplied to the four electrolytic tanks. Further, even when the water treatment apparatus was operated continuously for 60 days, no contamination such as deterioration occurred on the surfaces of the electrode plate and the spherical electrode.

(Example 2)
The water treatment apparatus shown in FIG. 8 was operated continuously for 45 days. Experimental conditions are shown below.
-Wastewater treatment flow rate: 150 l / h-Electrolyzer: Capacity 46L
Stirring speed 1 RPM
・ Spherical electrode: Size φ40mm
200 pieces ・ Electrolytic voltage: 12V to 36V
In Example 2, a part of the water in the cooling tower was supplied to the electrolytic cell.

  In the water after the treatment, the total hardness was reduced by 30% and the ionic silica was reduced by 22% compared with the water before the treatment. Further, even when the water treatment apparatus was continuously operated for 45 days, no contamination such as deterioration occurred on the surfaces of the electrode plate and the spherical electrode.

  In the conventional water treatment apparatus, a large number of electrode plates were arranged in the electrolytic cell, but when the apparatus was operated for 1 to 2 weeks, the surface of the electrode plates deteriorated. On the other hand, in Examples 1 and 2, since contamination such as deterioration did not occur on the surface of the electrode plate and the spherical electrode even after continuous operation for 45 days or more, it was found that the number of electrode cleanings can be greatly reduced in the present invention. It was. Moreover, since the continuous operation is possible for 45 days or more without interrupting the electrolysis, water can be treated with high efficiency. In particular, in Example 1, wastewater containing a very large amount of scale components was treated, but a large amount of scale components could be removed, and the water quality was very good.

  As mentioned above, although embodiment and Example of this invention were described based on drawing, it should be thought that a specific structure is not limited to these embodiment and Example. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

  In the above-described embodiment, the spherical spherical electrode is used. However, it is not limited to the spherical shape, and various shapes of electrode blocks such as a cylindrical shape and a polyhedron can be used.

  Further, in the above-described embodiment, the plurality of spherical electrodes 55 are disposed above the rotor blades 54. However, if the spherical electrode rotates by rotating the rotor blades, the ball electrodes may be provided in addition to the rotor blades. You may arrange.

  Furthermore, in the first embodiment described above, the water treatment apparatus 4 has the reaction tank 44 and the reaction tank 44 is disposed in the housing 41 of the water treatment apparatus 4, but the water treatment apparatus has the reaction tank. There may be no configuration. For example, the structure which does not have the reaction tank 344 may be sufficient as the water treatment apparatus 304 like 4th Embodiment.

  Moreover, although the water treatment apparatus was used for the cooling tower system in the above-mentioned embodiment, you may use the water treatment apparatus of this invention for another system and apparatus.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2,302 Cooling tower 3 Separation tank 4,204,304 Water treatment device 42,242 Electrolysis tank 43,243 Motor 51 First electrode plate 52 Second electrode plate 54 Rotor blade 55,55A, 55B, 55C Sphere Electrode (electrode lump)
152 Insulating plate (insulating member)

Claims (5)

An electrolytic cell;
A first electrode plate and a second electrode plate arranged to face each other in the electrolytic cell;
A plurality of electrode masses disposed between the first electrode plate and the second electrode plate;
A rotor blade disposed below the plurality of electrode masses;
A motor for rotating the rotor blade,
Each of the plurality of electrode masses is disposed so as to contact at least one of the first electrode plate, the second electrode plate, and another electrode mass,
The water treatment apparatus, wherein the first electrode plate and the second electrode plate are electrically connected by a plurality of the electrode masses. An electrolytic cell;
A first electrode plate and a second electrode plate arranged to face each other in the electrolytic cell;
A plurality of electrode masses disposed between the first electrode plate and the second electrode plate;
A rotor blade disposed below the plurality of electrode masses;
A motor for rotating the rotor blade,
The first electrode plate is a positive electrode;
The second electrode plate is a negative electrode;
An insulating member is disposed between the second electrode plate and the electrode mass closest to the second electrode plate of the plurality of electrode masses;
Each of the plurality of electrode masses is in contact with at least one of the first electrode plate and the other electrode mass,
The water treatment apparatus, wherein the first electrode plate and the plurality of electrode masses are electrically connected.   The water treatment apparatus according to claim 1, wherein the plurality of electrode masses are spherical. A cooling tower in which water treated by the water treatment device according to any one of claims 1 to 3 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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