JP2012232264A - Electrode structure of scale removing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode structure of a scale removing apparatus for removing a scale component, the electrode structure improving efficiency of electrolytic treatment and having improved maintainability by avoiding local concentration of current density caused by arrangement constitution of a wiring terminal connected with an electrode plate.SOLUTION: The scale removing apparatus 10 includes an electrolytic cell 12 which carries out electrolytic treatment of cooling water that is circulated and supplied to a heat exchanger 11. The electrode structure of the scale removing apparatus 10 is constituted so as to include: a plurality of electrode plates 13a to 13d which are arranged in parallel to each other in the electrolytic cell 12 with a predetermined electrode space and which have alternately exchanged polarity; wiring terminals 14a to 14d each of which is provided at an upper end of the electrode plate immersed in the cooling water and is thicker than thickness 2t of the electrode plate where voltage is applied from a power source part 15b; and a notch part 22 which is formed at an upper end of the electrode plate facing the wiring terminal of adjacent electrode plate.

Description

  The present invention relates to an electrode structure of a scale removing device for depositing and removing scale components contained in cooling water in a heat exchange facility in which scale adhesion in a pipe or the like becomes a problem.

A cooling water circulation device that circulates cooling water to a heat exchanger such as a cooling tower scatters the cooling water heated by the heat exchanger from the cooling tower, cools it, and circulates it again to the heat exchanger. In such a cooling water circulation device, insoluble calcium salt or the like adheres to the inner wall of the pipe as a scale, resulting in clogging of the pipe or a decrease in cooling efficiency. For this reason, it is common to add chemical | medical agents, such as a disinfectant and a scale inhibitor, to cooling water.
In addition, in order to prevent the scale from adhering due to water evaporation, the hardness of the cooling water is constantly monitored, and when the hardness exceeds a specified value, the cooling water in the cooling tower is replaced.

  However, in recent years, the use of chemicals has been restrained from the viewpoint of environmental pollution prevention, and a scale adhesion prevention method utilizing electrolytic treatment has been developed. For example, Patent Document 1 (Republished Patent WO 2006/027825) discloses an electrolytic cell for storing cooling water provided in a cooling water circulation path, a pair of electrodes installed in the electrolytic cell, and the pair of electrodes. A cooling water circulation device comprising: a voltage source that applies a voltage between the electrode plates; and an electrolysis device that performs electrolysis of the cooling water stored in the electrolytic cell by applying a voltage between the pair of electrode plates Is described.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2010-69366) describes a power supply voltage of a power supply unit when performing electrolysis by supplying a constant current between a plurality of electrode plates in a scale removing device provided with an electrolytic cell. A technique is described that improves the durability and maintainability of the electrode structure and the like by switching and controlling the connection circuit configuration formed by the electrode plate based on the change of the above.

Republished patent WO2006 / 027825 JP 2010-69366 A

However, in the conventional electrode structure in the scale removing device, the amount of current flowing through the electrode plate increases as the scale removing device becomes larger and the amount of processing increases, so it is necessary to make the wiring terminals connected to the electrode plate thicker. is there. As a result, current concentrates on specific locations on the adjacent electrode plates facing these wiring terminals, preventing uniform and stable scale deposition, resulting in poor processing efficiency and increased maintenance on the electrode plates. There was a problem to do.
The present invention has been made to solve the above-described conventional problems, and in the electrode structure of the scale removing device for removing the scale by electrolytically depositing the scale component in the cooling water, the arrangement of the wiring terminals connected to the electrode plate An object of the present invention is to provide an electrode structure of a scale removing device that can avoid the concentration of local current density due to the configuration and improve the efficiency of electrolytic treatment and the maintenance of the electrode structure.

(1) In order to solve the conventional problem, the electrode structure of the scale removing device of the present invention is:
An electrode structure of a scale removing device including an electrolytic cell for electrolytically processing cooling water circulated and supplied to a heat exchange facility,
A plurality of electrode plates arranged in parallel with each other having a predetermined electrode interval in the electrolytic cell and alternately switching their polarities, and provided at the upper end of the electrode plate immersed in the cooling water from the power supply unit It has a wiring terminal thicker than the thickness of the electrode plate to which a voltage is applied, and a notch formed at the upper end of the electrode plate facing the wiring terminal of the adjacent electrode plate.

(2) The present invention relates to the electrode structure of the scale removing device of (1),
The length 2h in the width direction of the notch is
When the thickness of the electrode plate is 2t, the radius of the wiring terminal is r, and the distance between the electrode plates is d,
2h ≧ 2 ((2d + r + t) (r−t)) ^1/2 .

  According to the present invention, a plurality of electrode plates arranged in parallel with each other at a predetermined electrode interval in the electrolytic cell, and a voltage from a power supply unit provided at an upper end of the electrode plate immersed in the cooling water. The wiring terminal connected to the electrode plate has a wiring terminal thicker than the electrode plate thickness to which is applied and a notch formed on the upper end of the electrode plate facing the wiring terminal of the adjacent electrode plate It is possible to avoid local current density concentration due to the arrangement configuration. Therefore, it is possible to improve the efficiency of electrolytic treatment and improve the maintainability of the electrode structure.

It is the schematic of the scale removal apparatus which concerns on an Example. It is explanatory drawing which shows the use condition of each electrode plate in the electrolytic cell of the scale removal apparatus which concerns on an Example. (A) is a top view which shows the structure of the electrode plate which concerns on an Example, (b) is a front view. (A) is a top view which shows the determination method of the notch part width | variety in the electrode plate which concerns on an Example, (b) is the detailed drawing, (c) is a partial expansion explanatory drawing.

  The electrode structure of the scale removing apparatus according to the present embodiment is an electrode structure of a scale removing apparatus provided with an electrolytic cell that electrolyzes cooling water that is circulated and supplied to a heat exchange facility. A plurality of electrode plates arranged in parallel with an electrode interval, and a wiring terminal thicker than the electrode plate thickness provided at the upper end of the electrode plate immersed in the cooling water and applied with a voltage from the power supply unit And a notch formed in a substantially rectangular shape at the upper end of the electrode plate facing the wiring terminal of the adjacent electrode plate.

  In the electrode structure of a scale removal device that removes scale by electrolytically depositing scale components in cooling water by providing such a notch in the electrode plate, this occurs with the arrangement of wiring terminals connected to the electrode plate. Therefore, it is possible to avoid the factor of local concentration and fluctuation of the current density, and to improve the efficiency of the electrolytic treatment and the maintenance of the electrode structure.

  The scale removal device that processes cooling water is attached to heat exchange equipment such as air conditioners, boilers, refrigerators, cooling heaters, and cooling towers, and electrolyzes scale components such as calcium ions contained in circulating cooling water. Is an apparatus for removing scale components in cooling water.

  The electrolytic cell is a container body that includes, for example, a supply port to which cooling water is supplied from a heat exchange facility and a discharge port for electrolyzed cooling water, and electrolyzes the cooling water supplied to the heat exchange facility. . In such an electrolytic cell, a plurality of electrode plates are arranged in parallel to each other, and a diaphragm plate can be arranged between the electrode plates as necessary to form an electrolytic cell.

The electrode plate is a thin metal conductor formed in a substantially rectangular plate shape, and there is no particular limitation on the electrode material, for example, a platinum plating layer formed on the substrate surface such as titanium or copper, Those having a composite plating layer of platinum and iridium can also be applied. By covering the surface of platinum with a noble metal such as iridium, the catalytic reaction is promoted, and the electrode elution due to anodization is reduced, so that consumption of the electrode can be suppressed.
Moreover, what does not elute the component of the electrode plate to cooling water, such as carbon, can be used.

The wiring terminal is a joining component member with an electrode plate including a metal lead wire or the like that is fixed by welding or mechanical pressure bonding to a predetermined position of the upper end of the electrode plate formed in a substantially rectangular plate shape immersed in the cooling water. The thickness of the electrode plate is greater than that of the electrode plate, and the voltage from the power source is applied via a metal lead wire or the like. As a method for connecting such a wiring terminal to the electrode plate, for example, there are means such as brazing and welding.
The wiring terminal has a thickness (radius r) larger than the electrode plate (thickness 2t) and is mounted on the electrode plate so as to protrude.
As a result, the electric field configuration of the electrode plate adjacent to the wiring terminal changes, and the current density of the electrode plate at a specific position becomes non-uniform and unevenly distributed. Although it is difficult to control the electrolytic treatment by supplying a constant current between the plates, the above problem can be solved by providing a notch portion described later.

In addition, a relay box part can be provided in the scale removal apparatus in this embodiment. As a result, a connection circuit configuration formed by a plurality of electrode plates installed in an electrolytic bath that electrolyzes cooling water and circulates and supplies it to a heat exchange facility, and a power supply unit that applies a voltage between these electrode plates Can be switched as appropriate. Thus, the relay box unit can be controlled via the electrolysis control unit such as a computer based on the change in the power supply voltage of the power supply unit in the constant current control for supplying a constant current between the electrode plates.
In other words, in constant current control in which the scale components in the cooling water are electrolytically deposited to remove the scale components, the power supply part of the electrode does not cause stress due to an excessive voltage change load, and has excellent durability and maintainability. A water descaling device can be provided.
In addition, by passing the water to be treated through an electrolyzer and carrying out electrolytic treatment, it is excellent in control operability and durability when the scale components are deposited on the electrode surface and removed from the water, and the scale is removed by precipitation. Can be performed stably.

The relay box section for switching the circuit configuration is, for example, a solid state relay that turns on and off a large output voltage with a small power input using a semiconductor element such as a thyristor, a program relay that is packaged by combining multiple relays, etc. Is connected to each electrode plate in the electrolytic cell and a power supply unit for supplying power to each electrode plate.
Thus, the connection circuit configuration set between the power supply unit and each electrode plate is changed to a predetermined pattern (for example, A function of switching to a series circuit configuration and a parallel circuit configuration of electrode plates).

  The power supply unit is a device for applying a voltage between the electrode plates selected and set by the relay box unit. For example, if the DC voltage before switching is 60V, the 0N time is 50%, and the OFF time is 50%, then the output is 30V by performing rectification (integration processing) on the rectangular wave, and so on. When the ON time is 10% and the OFF time is 90%, the output voltage is set to 6V. Thus, the output voltage can be controlled by changing the ON / OFF time ratio of the semiconductor.

  The electrolysis control unit is, for example, a control board equipped with a CPU, and a sensor for detecting a change in power supply voltage of the power supply unit is connected via an interface board or the like, and is fixed between the electrode plates. The relay box unit is controlled based on a change in power supply voltage of the power supply unit in constant current control for supplying current. This has a function of reducing the load of the power supply unit in constant current control by selecting a circuit configuration with a plurality of electrode plates loaded with voltage.

The notch is an electrode plate opening formed by opening a substantially rectangular shape with a notch width of 2h and a depth of e at the upper end of the electrode plate facing the wiring terminal of the adjacent electrode plate. In the electrode structure of the removing device, the length 2h in the width direction of the notch is
When the thickness of the electrode plate is 2t, the radius of the wiring terminal is r, and the distance between the electrode plates is d,
2h ≧ 2 ((2d + r + t) (r−t)) ^1/2 is preferable.
Thus, when the wiring terminal is larger than the thickness of the electrode plate, it is possible to reliably avoid electrode consumption at a specific location due to current flowing in a concentrated manner in the portion of the electrode plate that is close to and opposed to the wiring terminal. .
That is, a uniform current density distribution without current concentration can be expressed on the electrode plate surface.

  Furthermore, the electrode structure of the scale removing device of the present embodiment is such that the electrode plate is formed in a substantially rectangular shape by a titanium alloy that is platinum-plated on the entire surface, and the wiring terminal connected to the upper end of the electrode plate is connected to the electrode plate. It can be set as the structure which connected the thing of a diameter larger than thickness. As a result, the amount of current supplied to the electrode plate can be increased, the coupling strength with the wiring terminals can be maintained at a necessary level, and the efficiency and maintainability of the electrolytic treatment can be ensured.

  In addition, when supplying electric power to an electrode plate via a wiring terminal, constant current control for making an electrochemical reaction such as electrolytic deposition constant can be reliably and stably performed. That is, the power supply unit of this type of scale remover rectifies alternating current to direct current in order to change the output voltage, and performs switching (on / off processing) at a constant cycle using a semiconductor such as FET or IGBT, thereby turning on the semiconductor. The output voltage for generating a rectangular wave is controlled by changing the OFF time ratio, but the voltage is lowered when the ion concentration of the cooling water is high, and conversely the voltage is increased when the ion concentration is low. It is possible to maintain good controllability in automatic control inside the power supply so as to perform constant current control.

Example 1
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, the cooling water scale removing device 10 of the present embodiment is for electrolytically treating cooling water circulated to a heat exchange facility 11 provided in an air conditioner, a refrigerator, or the like.
Electrolytic bath 12 for electrolytically treating the cooling water and circulatingly supplying it to the heat exchange equipment 11, connected to four electrode plates 13 (13a to 13d) installed in the electrolytic bath 12, and electrode plates 13a to 13d The relay box portion 15a for switching the connection circuit configuration, the power source portion 15b for applying a voltage to the electrode plates 13a to 13d set by the relay box portion 15a, and the electrode plates 13a to 13d And an electrolysis control unit 16 for controlling the operation of the relay box unit 15a based on a change in the power supply voltage of the power supply unit 15b in the constant current control for supplying a constant current.

As shown in FIGS. 2 and 3, wiring terminals 14 (14 a to 14 d) that are thicker than the electrode plates connected to the relay box portion 15 a are attached to the upper ends of the electrode plates 13 a to 13 d, respectively. In addition, a notch portion 22 for relaxing current concentration is provided at a position facing each wiring terminal of the adjacent electrode plates 13a to 13d so as to open in a substantially rectangular shape.
That is, if the wiring terminal is larger than the thickness 2t of the electrode plate, the current concentrates on the closest part of the opposing electrode plate and the electrode plate part at a specific place is consumed, so that the current does not concentrate on the part near the wiring terminal. Further, in the combination of the electrode plates 13a to 13d, the notch 22 is provided at a position facing the power supply wiring terminal of the adjacent electrode plate. Here, the facing position means the same position as the position of the wiring terminal of the adjacent electrode plate when the electrode plates 13 face each other.

Here, as shown in FIG. 4A, the optimum shape of the notch is such that the shortest distance between the surface of the wiring terminal having the radius r and the electrode plate facing the wiring terminal is the distance between the electrode plates: d or less. This is obtained by cutting out a portion (a rectangular range within a dotted circle whose radius R of the circle drawn around the wiring terminal is (d + r)) from the opposing electrode plate.
That is, as shown in detail in FIG.
The resection radius R (see the partially enlarged explanatory view of FIG. 4C) is
The optimal value of the width of the notch is 2h,
When the thickness of the electrode plate is 2t, the radius of the wiring terminal is r, and the distance between the electrode plates is d,
The following relational expression holds.
(D + r) ² = (h) ² + (d + t) ² ,
Summarizing this relation for h,
(H) ² = (2d + r + t) (rt),
h = ((2d + r + t) (rt)) ^1/2 ,
The optimum value of the width of the notch 2h is twice this value.
Therefore, the width of the notch is 2 h or more.
In this example, the radius of the wiring terminal: r = 1.5 mm, the thickness of the electrode plate: 2t = 1 mm, and the distance between the electrode plates: d = 8 mm.
From the above relation,
The width of the notch: 2h = about 8.5 mm is obtained as the optimum value, and the width of the notch is 8.5 mm or more.
By determining the width and shape of the notch portion as described above, current density concentration in the electrode plate can be effectively avoided.

  In addition, the surface of the electrode plate 13 and the wiring terminal 14 is obtained by applying platinum plating to the surface of the titanium cloth, thereby adding corrosion resistance and durability.

The heat exchange facility 11 has a cooling water tank 11a for holding a predetermined amount of cooling water.
Further, a circulation pump 21 for supplying an appropriate amount of cooling water to the heat exchange facility 11 and a circulation pump 11b for scale removal device for circulatingly supplying cooling water to the scale removal device 10 are provided.
In addition, in the water channel that passes through the electrolytic cell 12 of the scale removing device 10 and returns to the cooling tank 11a, the supply water channel that is supplied to the electrolytic cell 12, and the discharge channel that discharges the cooling water stored in the bottom of the electrolytic cell 12, Control systems such as flow control valves 17 and 18 are provided, respectively, and the circulation pump 11b and the flow control valves 17 and 18 are driven and controlled via the electrolysis control unit 16, respectively.

In this way, the cooling water circulation passage for circulating the cooling water is connected to the heat exchange facility 11 such as a cooling tower, and the whole is configured in a loop shape. A cooling tower is a well-known structure which cools water by contact with air. The outgoing water pipe is equipped with a circulation pump (not shown) so that the cooling water cooled by the cooling tower can be pumped.
In addition, since the cooling water flowing through the circulation channel is lost due to evaporation or maintenance over time, the cooling tower is provided with a supply pipe for supplying the cooling water from the outside.

The scale removal apparatus 10 for cooling water is provided with first to fourth electrode plates 13a to 13d inside an electrolytic bath 12 for electrolytically treating the cooling water. These electrode plates 13a to 13d are connected to the power supply unit 15b via the relay box unit 15a.
The electrode plates 13a to 13d are not particularly limited as long as they are normally used in an electrolysis apparatus. For example, a plate obtained by plating platinum on titanium or copper, or a carbon electrode can be preferably used.
An electrolysis control unit 16 that functions as a controller is connected to the power supply unit 15b that generates direct current to control the voltage applied to the electrode plates 13a to 13d, and to monitor the current and voltage between the electrode plates. Can also be done.

A water supply pipe 12a for supplying circulating water from the cooling water tank 11a and an outflow pipe 12b for returning to the cooling water tank 11a are connected to the electrolytic tank 12, and a cooling water circulation flow for performing electrolytic treatment A road is constructed. A circulating pump 11b for removing device is provided on the side of the water supply pipe 12a so that the cooling water in the cooling water tank 11a is pumped to the electrolytic cell 12.
The cooling water flowing out from the electrolytic cell 12 returns to the cooling water tank 11a through the outflow pipe 12b. In addition, a discharge pipe 12c is provided at the bottom of the electrolytic cell 12, and a process of draining the cooling water containing the scale component staying inside the electrolytic cell to the outside of the cooling circulation channel through the flow control valve 18 is performed. It is like that.

A flow meter 19 and a thermometer sensor 20 are attached to predetermined locations in the cooling water circulation passage on the water supply pipe 12a side.
As described above, the flow rate and temperature data of the cooling water supplied to the electrolytic cell 12 are taken into the electrolysis control unit 16, and the scale removal device 10 energization state is determined together with the electrolysis data such as the electrolytic voltage and the electrolytic current in the electrolytic cell 12. Thus, the electrode plate connection configuration can be set to a predetermined pattern or the electrolysis conditions such as the electrolysis voltage can be changed according to the determination result.

Next, a cooling water scale removing method applied to the cooling water scale removing apparatus 10 according to the first embodiment configured as described above will be described.
For example, a power supply unit 15b for supplying DC power to the electrode plates 13a to 13d uses a constant current specification electrolytic DC power supply having a maximum of 60V / constant current of 10A.
This type of power supply, which is currently commercially available, rectifies the input AC once to change the output voltage, and performs switching (ON / OFF processing) at regular intervals using semiconductors such as FETs and IGBTs. To generate a square wave. For example, when the DC voltage before switching is 60 V, the 0N time is 50%, and the OFF time is 50%, the output can be set to about 30 V by performing rectification (integration processing) on the rectangular wave thereafter. .

Similarly, if the ON time is 10% and the OFF time is 90%, the output voltage is set to 6V. In this way, the output voltage can be controlled by changing the ON / OFF time ratio of the semiconductor.
When constant current control is performed using such a power supply, the current easily flows when the ion concentration of the circulating water increases, and automatic control is performed inside the power supply to reduce the voltage. For example, if the control is set to 10 A, when the ON time is 10% and the OFF time is 90%, the current that flows when the semiconductor is turned on is 100 A or more. Several times more current flows at the moment of turning on.
As described above, when the load resistance is reduced even with a power supply output of 60 V maximum and a power supply of 10 A, a large current flows through the electrode, leading to consumption of the electrode plate.
60V is the maximum value of the control voltage of the switching element in the power supply, and the current flowing to each electrode is limited to 10A.

In addition, the scale removal apparatus 10 can drive the relay box part 15a via the electrolysis control part 16, and can switch the arrangement | sequence state of each electrode plate 13a-13d in series, parallel, etc.
Thus, even if the conductivity of the cooling water flowing through the cooling water circulation channel is the same, the voltage is applied to the four electrode plates 13a to 13d from the series connection in which a voltage is applied between the two electrode plates 13a and the electrode plate 13d. By switching to the parallel connection to be applied, the electric resistance viewed from the power source can be about 9 times or 1/9, and a larger change in conductivity can be dealt with.

  Thus, in the scale removing device of the present embodiment, in the constant current control for supplying a constant current between the plurality of electrode plates, the notch 22 is provided at a predetermined position of the electrode plates 13a to 13d. The scale component in the cooling water supplied to the heat exchange equipment 11 can be stably deposited and removed by electrolytic treatment while preventing wear and has excellent durability and control operability in the electrolytic deposition treatment. An electrode structure of a scale removing device can be provided.

As described above, according to the present invention, a notch is provided at the upper end of an adjacent electrode plate at a position facing a wiring terminal thicker than the electrode plate thickness provided at the upper ends of a plurality of electrode plates arranged in parallel. Therefore, the gist of the present invention is to avoid the adverse effects of current density concentration in the electrode plate, and the corresponding ones belong to the scope of the right of the present invention.
For example, in the present embodiment, as an example of the scale removing device, an example in which the electrolytic treatment is performed by switching the polarity of each electrode plate via the relay box portion 15a has been described in detail. Also, the electrode structure of the present invention can be applied.
Further, the case where the number of electrode plates arranged in parallel in the electrolytic cell 12 is four has been described in detail, but two or six or more electrode plates are arranged in parallel in the electrolytic cell. , Electrodes connected to the relay box and activated in the electrolytic cell based on the electrolysis voltage and current measured in the electrolytic cell, the conductivity, temperature, flow rate, etc. of the cooling water flowing in the cell It is also possible to set electrolysis conditions such as the circuit pattern of the plate and the applied voltage.

  The electrode structure of the scale removing apparatus of the present invention is a scale removing apparatus that removes scale by electrolytically depositing scale components in cooling water, and has a local current density associated with the arrangement of wiring terminals connected to the electrode plate. The concentration can be avoided, the efficiency of the electrolytic treatment can be improved, and the maintainability of the electrode structure can be improved, and the industrial applicability is extremely high.

DESCRIPTION OF SYMBOLS 10 ... Cooling water scale removal apparatus 11 ... Heat exchange equipment 11a ... Cooling water tank 11b ... Circulation pump for removal apparatus 12 ... Electrolyzer 12a ... Water supply pipe 12b ... Outflow Pipe 12c ... Drain pipe 13 (13a-13d) ... Electrode plate 14 (14a-14d) ... Wiring terminal 15a ... Relay box part 15b ... Power supply part 16 ... Electrolytic control part 17 , 18 ... Flow control valve 19 ... Flow meter 20 ... Water temperature meter 21 ... Circulating water pump 22 ... Notch

(1) In order to solve the conventional problem, the electrode structure of the scale removing device of the present invention is:
An electrode structure of a scale removing device including an electrolytic cell for electrolytically processing cooling water circulated and supplied to a heat exchange facility,
A plurality of electrode plates arranged in parallel with each other having a predetermined electrode interval in the electrolytic cell and alternately switching the polarity;
A wiring terminal thicker than the electrode plate thickness to which the voltage from the power supply unit is applied at the upper end of the electrode plate immersed in the cooling water,
A notch formed at the upper end of the electrode plate facing the wiring terminal of the adjacent electrode plate,
Have
The position of the wiring terminal provided at the upper end of the electrode plate is
Each electrode plate is provided by shifting in the horizontal direction,
When the electrode plates are arranged in parallel in the electrolytic cell, the positions of the wiring terminals of the electrode plates do not overlap in the parallel direction .

(2) The present invention relates to the electrode structure of the scale removing device of (1),
When the thickness of the wiring terminal is larger than the electrode plate thickness,
The notch portion of the electrode plate facing and proximate to the wiring terminal is
It is characterized by being cut and opened by a circle drawn from the center of the wiring terminal attached to the electrode plate .

(1) In order to solve the conventional problem, the electrode structure of the scale removing device of the present invention is:
An electrode structure of a scale removing device including an electrolytic cell for electrolytically processing cooling water circulated and supplied to a heat exchange facility,
A plurality of electrode plates arranged in parallel with each other having a predetermined electrode interval in the electrolytic cell and alternately switching the polarity;
A wiring terminal thicker than the electrode plate thickness to which the voltage from the power supply unit is applied at the upper end of the electrode plate immersed in the cooling water,
A notch formed at the upper end of the electrode plate facing the wiring terminal of the adjacent electrode plate,
Have
The positions of the wiring terminal and the notch provided at the upper end of the electrode plate are as follows:
Each electrode plate is provided by sequentially shifting in the horizontal direction,
When the electrode plates are arranged in parallel in the electrolytic cell, the positions of the wiring terminals and the cutout portions of the electrode plates do not overlap in the parallel direction.

(2) The present invention relates to the electrode structure of the scale removing device of (1),
Increasing the thickness of the wiring terminals from the electrode plate thickness,
The notch portion of the electrode plate facing and proximate to the wiring terminal is
It is characterized by being cut and opened by a circle drawn from the center of the wiring terminal attached to the electrode plate.

Claims (2)

An electrode structure of a scale removing device including an electrolytic cell for electrolytically processing cooling water circulated and supplied to a heat exchange facility,
A plurality of electrode plates arranged in parallel with each other having a predetermined electrode interval in the electrolytic cell and alternately switching their polarities, and provided at the upper end of the electrode plate immersed in the cooling water from the power supply unit A scale removing device comprising: a wiring terminal thicker than an electrode plate thickness to which a voltage is applied; and a notch formed at an upper end of an electrode plate facing the wiring terminal of an adjacent electrode plate. Electrode structure. The length 2h in the width direction of the notch is
When the thickness of the electrode plate is 2t, the radius of the wiring terminal is r, and the distance between the electrode plates is d,
2. The electrode structure of the scale removing device according to claim 1, wherein 2h ≧ 2 ((2d + r + t) (rt)) ^1/2 .

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