JPH08299989A - Electrode type water treating device provided with detecting function for concentrated degree of solution - Google Patents

Abstract

PURPOSE: To provide an electrode type water treating device provided with a detecting function for a concentrated degree of soln. capable of coping in accordance with the concentrated degree of the scale component by grasping the concentrated degree of the scale component in water. CONSTITUTION: Electrodes 5 and 6 are placed opposite to each other by interposing a space at an circulating system of water such as cleaning tower, and voltage is applied to the electrodes 5 and 6 to suppress a deposition of the scale component in the water. Moreover, a current flowing between the electrodes 5 and 6 is detected with a soln. concn. detecting means 13 to electrically detect an electrical conductivity of the water, and the concentrated degree of the scale component in the water is detected. Then, when the detected concentrated degree of the scale component an upper limit value of a set concentrated degree previously set, an instruction signal for controlling the concentrated degree is outputted with a signal outputting means 14. When the concentrated degree of the scale component in the water is lowered by replenishing the water in the cleaning tower and the detected concentrated degree of the scale component becomes less than a lower limit value of the set concentrated degree previously set, an instruction signal for stopping the controlling is outputted with the signal outputting means 14 to stop the replenishing of the water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode type water treatment apparatus with a solution concentration detecting function for reforming water passing through a water pipe of a circulating system such as a cooling tower or a boiler.

[0002]

2. Description of the Related Art As is well known, water contains substances such as calcium and magnesium, and these calcium and magnesium are deposited as scales, and the deposited scales adhere and grow on the inner wall surface of a water pipe. There are various problems such as poor water flow.

An electrode type water treatment apparatus as shown in FIG. 8 has been proposed to prevent such scale deposition. In this device, an insulating fixing plate 2 is arranged inside a tubular body 1 made of aluminum or the like, and a carbon rod 3 is attached to the center of the fixing plate 2, and the tubular body 1 is interposed in a water supply pipe. ,
In the water passing through the inside of the tubular body 1, an electric current is passed between the aluminum and carbon by utilizing the difference in the ionization tendency of aluminum and carbon, and the water flowing through this current energy is activated to increase the solubility of the water. It is intended to prevent precipitation.

However, the current generated by the difference in the ionization tendency is very weak and is still insufficient in terms of the effect of activating water. Therefore, when the device shown in FIG. There is a problem that dirt or an oxide film adheres to the electrode surface of the carbon rod 3, the activation effect of water is weakened, and the reforming effect of water is lost.

Therefore, in order to solve the problem, the applicant of the present invention, as shown in FIG.
By arranging a pair of stainless electrodes 5 and 6 inside each other with a space therebetween and applying a rectangular polarity reversal voltage to the electrodes 5 and 6, it is difficult for dirt and an oxide film to be attached to the surfaces of the electrodes 5 and 6. We have proposed an electrode-type water treatment system that can give sufficient activation energy to water and prevent scale deposition over a long period of time.

In the figure, a rod-shaped conductor 7 is connected and fixed to each of the electrodes 5 and 6, and the conductor 7 is hermetically attached to the housing 4 via an insulating member (not shown). The conductor 7 of each of the electrodes 5 and 6 is connected to the controller 8 so that the polarity inversion driving means formed in the controller 8 applies a rectangular polarity inversion voltage to the electrodes 5 and 6. It has become. Further, FIG. 5 shows an external view of the electrode-type water treatment device of FIG. 4, but as shown in FIGS. 4 and 5, on both ends of the housing 4, there is a connecting portion 16 for connecting to a water pipe or the like. Has been formed.

FIG. 6 shows a circuit of the control device 8.
The control device 8 has a polarity reversal drive means 9 which functions as a voltage application means, and the polarity reversal drive means 9 includes a power supply circuit 10,
And a rectangular pulse oscillator circuit 11. The power supply circuit 10 is configured to step down the power supply voltage of the commercial power supply, convert it into a DC voltage as needed, and apply the voltage to the rectangular pulse oscillation circuit 11. The rectangular pulse oscillation circuit 11 is as shown in FIG. A pulse voltage in which the plus and minus of the rectangle are inverted is generated, and the voltage with the inverted polarity is applied to the electrodes 5 and 6. Then, the current flowing between the electrodes 5 and 6 becomes a rectangular pulse current that periodically changes with respect to time t, as shown in FIG.

According to this device, since the current flowing between the electrodes 5 and 6 is given as a rectangular polarity reversal pulse current as shown in FIG. 7, the polarity reversal switching of the opposing electrodes is instantaneously performed. When the scale is abruptly changed, the momentary inertia energy when the scale is inverted by the polarity reversal switching of the electrode breaks the bonds between the molecules of the scale, and the scale becomes very small and dissolves in water. It is considered that the generation of scale is suppressed more effectively. In fact, if this device is provided in the water supply pipe, the scale is prevented from precipitating as compared with the case where the device shown in FIG. 8 is provided. It has been proven that it can be prevented over a long period of time.

[0009]

However, since the scale component in water is easily concentrated in water in the circulation system such as a cooling tower or a boiler due to evaporation or the like, the scale deposition rate is high, and as shown in FIG. Even if an electrode-type water treatment device was provided, it was difficult to completely prevent scale deposition. Therefore, for example, regular maintenance such as cleaning and replacement of the water pipe on which scale has deposited is required,
Hopefully, when the water in the circulation system is concentrated, it is necessary to replenish the circulation system with water to prevent scale deposition. However, if the concentration of water in the circulation system cannot be determined, maintenance and It is difficult to know when to replenish water,
It was difficult to grasp the timing of maintenance and deal with it.

The present invention has been made to solve the above problems, and an object thereof is to be able to grasp the solution concentration of water in a circulation system, and thereby to properly adjust the concentration of water. An object is to provide an electrode-type water treatment device with a solution concentration detecting function, which can promote an operation for keeping the above.

[0011]

In order to achieve the above object, the present invention is constructed as follows. That is, in the first aspect of the present invention, the electrodes are arranged to face each other with a gap in a water circulation system including a water replenishment control unit that replenishes water and stops replenishment of water.
An electrode-type water treatment device which is provided with voltage applying means for applying a voltage to this electrode to suppress the deposition of scale components in water by applying a voltage to the electrode and electrically detecting the electrical conductivity of water. By having a solution concentration concentration detection means for detecting the scale component concentration in water by, the set enrichment upper limit value is given, the scale component enrichment detected by the solution concentration detection means is the set enrichment upper limit value. When it reaches, the signal output means for outputting a concentration adjustment command signal to replenish the circulation system with water by the water replenishment control means to reduce the scale component concentration in water is provided. .

In the second aspect of the invention, electrodes are arranged facing each other with a space provided in a water circulation system having a water replenishment control means for replenishing and stopping the water supply, and a voltage for applying a voltage to the electrodes. An electrode-type water treatment device that is provided with an applying means to suppress the deposition of scale components in water by applying a voltage to the electrodes.The electrical conductivity of water is electrically detected to increase the concentration of scale components in water. It has a solution enrichment detecting means for detecting, a set enrichment upper limit value and a set enrichment lower limit value are respectively given, and the scale component enrichment detected by the solution enrichment detecting means is the set enrichment upper limit value. When it reaches, the concentration adjustment command signal is output to replenish water in the circulation system by the water replenishment control means to reduce the scale component concentration in water, and the detected scale component concentration is set lower than the set concentration lower limit. Less than value When became are configured as characterized in that a signal output means for outputting an adjustment stop command signal for stopping the supply of water into the circulatory system by the rehydration controlling means.

Further, the circulation system has drainage means, and the signal output means is preset such that the scale component enrichment detected by the solution enrichment detection means reaches the set enrichment upper limit value at least once. When the number of times exceeds the set number, the drainage command signal is output, and the water in the circulation system is drained by the drainage means. The circulation system has drainage means, and the signal output means detects the solution concentration. When the number of times the scale component enrichment detected by the means reaches the set enrichment upper limit value is equal to or more than the preset number of times of one or more, a drainage command signal is output and the drainage means drains the water in the circulation system. After that, the water replenishment control means is configured to automatically exchange water in the system by injecting water into the circulation system, and the command signal output by the signal output means is notified separately. Providing the notifying means is also a characteristic structure of the present invention.

[0014]

In the present invention having the above-mentioned structure, the concentration of the scale component in water in the circulation system is detected by the solution concentration detection means, and the concentration of the scale component in water is previously determined according to the detected concentration of the scale component. When the given set concentration upper limit value is reached, the signal output means outputs a concentration adjustment command signal to be added to the replenishment water control means, whereby the replenishment water control means replenishes water in the circulation system. To reduce the concentration of scale components in water,
Deposition of scale is suppressed.

Further, according to the second aspect of the present invention, when the detected scale component concentration is equal to or lower than the set lower limit concentration value, an adjustment stop command for stopping the replenishment of water into the circulation system by the water replenishment control means. A signal is output by the signal output means, and the replenishment control means stops the supply of water into the circulation system.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same reference numerals will be given to the same names as those of the electrode type water treatment device shown in FIG. 4, and detailed description thereof will be omitted. The electrode-type water treatment device with a solution concentration detecting function of this embodiment has a housing 4, electrodes 5, 6, a conductor 7, and a control device 8 as in the device shown in FIG. The electrode-type water treatment device of the embodiment is installed in a circulation pipe line 38 of a cooling tower as a circulation system as shown in FIG.

As shown in FIG. 2, the cooling tower circulates through the circulation pipe 38 as shown by the arrow by the action of the circulation pump 41, is sprinkled by the sprinkling pipe 34 in the casing 33, and falls to the lower water tank 36 side. The heat exchanger 35 is configured to cool the water passing through the heat exchanger 35 with the rushed water.
The water passing through is sent to, for example, a cooler in each room in the building.

The cooling tower is provided with a circulating water adjusting device 15. The circulating water adjusting device 15 is adapted to, for example, water which is sprinkled from the sprinkling pipe 34 and evaporates when the water falls into the lower water tank 36. A replenishment control means 24 for replenishing and stopping the supply of water is provided for replenishment, and a blow control means 25 as a drainage means for draining the water in the lower water tank 36 is provided.

The water replenishment control means 24 opens and closes the water replenishment valve 18 provided in the replenishment water pipe 39 as necessary, thereby automatically replenishing water to the lower water tank 36 and stopping the replenishment of water. I am supposed to do it. The blow control means 25 stops the circulation pump 41 and opens / closes the drainage blow valve 19 provided in the drainage pipe 40 as necessary, whereby the lower water tank 36
The water is automatically drained.

FIG. 1 shows a control configuration of the electrode type water treatment apparatus with a solution concentration detecting function of the present embodiment. The characteristic of the present embodiment different from the apparatus of FIG. 20 is provided, and in the control device 8, a solution enrichment detecting means 13 for detecting the enrichment of scale components in water by electrically detecting the electrical conductivity of water, and a set enrichment upper limit value. By providing the memory unit 26 for storing the lower limit of the concentration and the signal output means 14 for outputting a command signal to the circulating water adjusting device 15 side and the display device 20 side of the cooling tower according to the detected scale component concentration. is there.

The solution concentration detecting means 13 is provided between the polarity reversal driving means 9 and the electrodes 5 and 6, and is an electrode when a constant voltage is applied from the polarity reversal driving means 9 to the electrodes 5 and 6. The current flowing between 5 and 6 is measured, the electrical conductivity in water is electrically detected from the measured current value, and thereby the concentration of scale components in water is detected.

By the way, it has already been confirmed by experiments by the applicant of the present invention that the scale component enrichment in water is proportional to the electric conductivity of water. Becomes easier to flow, and the electric conductivity of water also rises. In other words, when the electrical conductivity of water is high, it is determined that the concentration of scale components in water is also high, and the concentration of scale components in water can be detected by detecting the electrical conductivity of water. And
By investigating beforehand the relationship between the electrical conductivity and the scale component enrichment, such as how many times the electrical conductivity increases, the scale concentration increases, the change in electrical conductivity in water causes It is possible to detect the scale component enrichment.

Therefore, the solution concentration detecting means 13 of the present embodiment
Always detects the electrical conductivity in water and compares it with the initial electrical conductivity, thereby detecting the scale component concentration in water, and adds the detection result to the signal output means 14.

In addition, the relationship between the scale component concentration and the scale precipitation phenomenon, such as the value of the scale concentration in water at which scale precipitation occurs, is investigated in advance. The component concentration is input to the memory unit 26 as the set concentration upper limit value, and it is also checked whether the scale concentration in water becomes less than or equal to which scale precipitation is almost completely suppressed. The enrichment is entered in the memory unit 26 as the set enrichment lower limit value.

The signal output means 14 stores the value of the scale component enrichment added from the solution enrichment detecting means 13 in the memory section.
The set enrichment upper limit value and the set enrichment lower limit value given in advance to 26 are compared, and the value of the scale component enrichment added from the solution enrichment detecting means 13 is given to the memory unit 26. When it reaches the value, it outputs a concentration adjustment command signal to the replenishment control means 24 of the circulating water adjusting device 15 and replenishes water to the lower water tank 36 in the cooling tower by the control of the replenishment water control means 24 to scale underwater. Reduce the concentration of ingredients. Further, when the value of the scale component enrichment added from the solution enrichment detecting means 13 becomes less than or equal to the set enrichment lower limit value given to the memory unit 26, the water into the cooling tower by the replenishment control means 24 is Outputs an adjustment stop command signal to stop replenishment, and replenishment control means
Add to 24.

When the number of times the scale component enrichment detected by the solution enrichment detecting means 13 or the set enrichment upper limit value reaches one or more preset preset times or more, A drainage command signal is output and added to the blow control means 25 of the circulating water adjusting device 15.

Further, the signal output means 14 is provided with the respective command signals (concentration adjustment command signal, adjustment stop command signal,
When adding the drainage command signal) to the circulating water adjusting device 15, the above command signals are also applied to the display device 20 at the same time.

The signal output means 14 is provided with a counter (not shown), and the solution concentration detecting means 13 is provided.
Each time the scale component enrichment detected by the above reaches the set enrichment upper limit value, the number of times it reaches is stored in a counter, and the count (number of times) stored in this counter is, for example, 5 times. The drainage command signal is output when the number of times exceeds a preset number of times. Then, when the water in the lower water tank 36 is drained and then new water (make-up water) is poured into the lower water tank 36, the count stored in the counter is cleared and reset to zero. Has become.

The water replenishment control means 24 receives each command signal from the signal output means 14, and when the concentration adjustment command signal is added, opens the water replenishment valve 18 to supply water from the replenishment water pipe 39 to the lower water tank 36. By supplying water, the cooling tower is replenished with water to reduce the concentration of scale components in water. Further, when the adjustment stop command signal is applied from the signal output means 14, the water replenishment valve 18 is closed to stop the replenishment of water from the replenishment water pipe 39 to the lower water tank 36, thereby replenishing the water in the cooling tower. To stop.

The blow control means 25 receives the drainage command signal applied from the signal output means 14, and first, the circulation pump 41.
Stop, then open the drain blow valve 19 to open the drain pipe 40.
The water in the lower water tank 36 is drained through the blower, and the blow control means 25 is provided with a blow timer (not shown). In this blow timer, a sufficient time necessary for draining the water in the lower water tank 36 is set in advance under the control of the blow control means 25, and the blow timer is turned on at the same time when the drain blow valve 19 is opened. When the blow timer is turned off, the drainage blow valve 19 is automatically closed by the blow control means 25, and the blow operation (drainage operation) is completed. At the end of this blow operation, a blow operation end signal is added to the water replenishment control means 24.

The replenishment control means 24, when the blow operation end signal is added from the blow control means 25, the water supply valve 18
Is opened to supply water from the makeup water pipe 39 to the lower water tank 36, and the replenishment control means 24 is provided with a water injection timer (not shown). In this water injection timer, when water is supplied from the makeup water pipe 39 to the lower water tank 36, the time required to supply water to a preset water level set in advance in the lower water tank 36 is preset, Water supply valve
The water injection timer is turned on when 18 is opened. Further, when the water injection timer is turned off, the water supply valve 18 is automatically closed by the water supply control means 24, whereby the injection of makeup water is completed.

The display device 20 functions as an informing means for distinguishing and informing the command signal output by the signal output means 14, and is constituted by including a dilution operation lamp and a drainage operation lamp which are not shown. ing. Then, the display device 20 receives each command signal added from the signal output means 14, and when the concentration adjustment command signal is output from the signal output means 14, lights the dilution operation lamp and adds the adjustment stop command signal. When this is done, the dilution operation lamp is turned off. In this way, the display device 20 lights up the dilution operation lamp from the start of the dilution operation to the stop of the dilution operation, so that the circulating water adjusting device 15 replenishes the cooling tower with water to concentrate the scale components in the water. That is, the fact that the operation of reducing the degree is being performed is notified.

Further, the display device 20 receives the drainage command signal from the signal output means 14, and turns on the drainage operation lamp, which controls the replenishment controller 24. When the injection of the replenishment water by the above is completed, the signal from the replenishment water control means 24 is received and the light is turned off. And, in this way, the signal output means
By outputting the drainage command signal from 14, the blow operation of the water in the lower water tank 36 is started, and then the discharge water operation lamp is turned on until the makeup water injection from the makeup water pipe 39 to the lower water tank 36 is completed. The operation from the drainage of water from the lower water tank 36 to the injection of new water into the lower water tank 36 is informed.

This embodiment is constructed as described above,
Next, the operation will be described based on the flowchart shown in FIG. 3 and FIGS. First, the steps in FIG.
At 101, when the electrode type water treatment device 30 with a solution concentration detecting function of the present embodiment (FIG. 2) is turned on, the polarity reversal drive is performed in the present embodiment as well as the electrode type water treatment device shown in FIG. Means 9
Thus, the polarity reversal voltage is applied to the electrodes 5 and 6 to prevent the scale from being deposited. In this embodiment, at the same time as the scale is prevented from being deposited, the solution concentration detecting means 13 is used by the solution concentration detecting means 13 in the step of FIG. The current flowing between 5 and 6 is detected, the change in the electric conductivity of the water is electrically detected by the change of the current value, and the scale component enrichment in the water is detected. Then, in step 103, it is judged whether or not the detected scale component enrichment reaches the set enrichment upper limit value, and when the scale component enrichment reaches the set enrichment upper limit value, the routine proceeds to step 104.

In step 104, it is judged whether or not the number of times the scale component enrichment in water has reached the set enrichment upper limit value is 5 times or more. When it becomes above, it progresses to step 109 and 5
When it is less than the number of times, go to step 105.

In step 105, the counter of the signal output means 14 is incremented by one, and in step 106, the signal output means 14 is incremented.
A concentration adjustment command signal is applied from 14 to the water replenishment control means 24 to start the operation of diluting the water in the lower water tank 36 in the cooling tower. This diluting operation is performed by the control of the water replenishment control means 24, the water replenishment valve 18 is opened, and the replenishment water pipe 39
Water is supplied to the lower water tank 36 from. Also,
At this time, the display device 20 turns on the dilution operation lamp. Then, in step 107, it is determined whether or not the scale concentration in the water detected by the solution concentration detecting means 13 by the signal output means 14 is equal to or lower than the set lower limit concentration input to the memory section 26. Is determined and it is determined that the scale component concentration in water is equal to or less than the set lower limit concentration, the dilution operation by replenishing water to the lower water tank 36 is continued.

In step 107, when the scale component concentration in the water becomes equal to or less than the set lower limit concentration,
At 108, an adjustment stop command signal is output from the signal output means 14 and added to the water replenishment control means 24, and the dilution operation is stopped. At this time, lighting of the dilution operation lamp by the display device 20 is also stopped, and the dilution operation lamp is turned off. Then, after the series of dilution operations as described above is completed, the process returns to step 102, and the scale-precipitation preventing operation and the scale-component enrichment detecting operation by the electrode-type water treatment device 30 are continued.

On the other hand, in step 104, the number of times the concentration of scale component in water reaches the preset upper limit of concentration is 5
When it is determined that the rotation has been reached, and the process proceeds to step 109, a drainage command signal is output from the signal output means 14 and added to the blow control means 25, and by the control of the blow control means 25, the circulation pump 41 is stopped and water circulation is performed. The operation is stopped.

Next, in step 110, the blow control means 25
Thus, the drainage blow valve 19 is opened, and the drainage blow operation of water in the lower water tank 36 is started. At this time, the blow timer is turned on simultaneously with the start of the blow operation, and the display device 20
The drainage water operation lamp is turned on. Then, the blow operation is continued until it is determined in step 111 that the blow timer set time has been reached, and when it is determined in step 111 that the blow timer set time has been reached, the blow control means 25 determines in step 112. Blow valve for drainage 19
Is closed and the blow operation is stopped. Further, at this time, a blow operation end signal is added from the blow control means 25 to the water replenishment control means 24.

Next, at step 113, the replenishment control means 24 opens the water replenishment valve 18 to start the replenishment water injection operation,
At the same time, a water injection timer (not shown) in the water supply control means 24 is turned on. Then, in step 114, the makeup water injection operation is continued until it is determined that the set time of the water injection timer is reached, and when it is determined in step 114 that the set time of the water injection timer is reached, step 115 so,
The water supply control means 24 closes the water supply valve 18 to stop the supplied water supply operation, and at this time, the discharge water supply operation lamp of the display device 20 is turned off.

Next, in step 116, the count of the counter of the signal output means 14 is cleared and returned to zero, and in step 117, the circulation pump 41 is turned on and the lower water tank 36 is turned on via the circulation line 38. The water circulation operation of circulating the water is started, and the scale-precipitation preventing operation and the scale-component enrichment detecting operation by the electrode-type water treatment device 30 are performed again.

According to the present embodiment, the operation of the solution concentration detecting means 13 electrically detects the electric conductivity in water from the value of the current flowing between the electrodes 5 and 6, whereby the scale component in the cooling tower is detected. Concentration can be detected and grasped. Then, according to the detected scale component enrichment, when the scale component enrichment reaches the preset enrichment upper limit value given in advance, from the signal output means 14 to the replenishment control means 24 of the circulating water adjusting device 15 of the cooling tower. An enrichment adjustment command signal is added to automatically adjust the concentration of scale components in water in the cooling tower to a smaller value. It becomes possible to prevent the components from being excessively concentrated, and thereby to prevent the scale from depositing, and to prevent the scale from depositing for a long period of time.

Further, when the scale component enrichment becomes lower than a preset lower limit of preset enrichment by the operation of reducing the scale enrichment in water, the lower water tank 36 is controlled by the rehydration control means 24. Since the water supply operation to the water is automatically stopped, for example, after the scale component concentration adjustment operation is completed, the operator closes the water supply valve 18 or the signal output unit 14 outputs the concentration adjustment command. There is no need to cancel the signal, and such trouble can be omitted.

Further, according to this embodiment, the number of times the scale component enrichment detected by the solution enrichment detecting means 13 reaches the set enrichment upper limit value is equal to or greater than the preset number of times (5 times). In this case, the signal output means 14 outputs a drainage command signal to the blow control means 25, and the lower water tank 36
Is drained, and then new water is supplied from the makeup water pipe 39 to the lower water tank 36 to replace the water,
It is possible to suppress scale precipitation more efficiently than to suppress scale precipitation by repeating the dilution operation endlessly. Moreover, the replacement of water is controlled by the blow control means 25.
Since it is automatically performed by using the water replenishment control means 24, it is possible to omit the trouble of manually opening and closing the water replenishment valve 18 to perform the water replenishment operation.

Therefore, according to the present embodiment, since the scale can be very efficiently prevented from being deposited so that the scale is hardly deposited in the cooling tower,
It is possible to prolong the life of the circulation system such as the cooling tower and the boiler, because the scale is deposited in the cooling tower and the maintenance such as cleaning the water pipe and replacing the water pipe is almost unnecessary to remove the scale.

The present invention is not limited to the above-mentioned embodiments, and various embodiments can be adopted. For example, in the above embodiment, the signal output unit 14 outputs the drainage command signal when the number of times the scale component concentration detected by the solution concentration detection unit 13 reaches the set concentration upper limit value is 5. However, the number of times is not limited to five, and an appropriate number of times is set to one or more, and when the number of times is set or more, the signal output means 14 outputs the drainage command signal. .

The drainage command signal is not always output when the scale component concentration in water reaches the set upper limit value at an appropriate number of times of 1 or more. For example, the operating time of a circulation system such as a cooling tower is May be output based on the operating time of the circulation system, such as outputting every 100 hours.

Furthermore, in the above embodiment, when the scale component concentration in water reaches the preset upper limit value, the replenishment operation of water to the lower water tank 36 is started, and the scale component concentration in water is changed in advance. Although the water supply operation is stopped when the given set lower limit value is reached, for example, a water supply timer or the like is provided without giving the set lower limit value,
This timer may be activated at the start of the water replenishment operation, and the water replenishment operation may be automatically stopped when the water replenishment timer set time is reached.

Further, in the above embodiment, the blow control means
The blow timer is provided in 25, and the drain operation is performed from the time the blow timer is turned on until the blow timer set time is reached, but the drain operation is not always performed according to the blow timer. , A water level sensor or the like for detecting the water level in the lower water tank 36 is provided, and the water level in the lower water tank 36 is detected by this water level sensor.
The drainage operation may be terminated when the water level inside becomes zero.

Further, in the above embodiment, the rehydration control means 24
A water injection timer is installed at the water supply valve 18
After the water injection timer is turned on, the makeup water injection operation from the makeup water pipe 39 to the lower water tank 36 is performed until the water injection timer set time is reached, but this makeup water injection operation does not always follow the injection timer. Not always done,
For example, a water level sensor that detects the water level in the lower water tank 36 may be provided, and the water injection operation may be performed until the water level detected by this water level sensor reaches a preset water level. Note that this water level sensor may be one that electrically detects the water level, or it may detect the water level by a method other than electrically detecting the water level, such as a ball tap or a float, and an appropriate water level. A sensor can be used.

Further, in the above embodiment, when the water in the lower water tank 36 is replaced, the water in the lower water tank 36 is completely drained by the draining operation, and then the water is injected from the makeup water pipe 39 to the lower water tank 36. Although the water in the lower water tank 36 is automatically exchanged, for example, the amount of drainage water from the drain pipe 40 and the makeup water pipe 39
Is set to be equal to the amount of make-up water from, and the drainage operation and the make-up water injection operation are simultaneously performed without stopping the circulation pump 41, and the scale component concentration detected by the solution concentration detecting means 13 is The drainage operation and the makeup water injection operation may be stopped when the set concentration lower limit value is reached.

Further, in the above embodiment, the display device 20 is provided with the dilution operation lamp and the drainage operation lamp, the dilution operation lamp is turned on during the dilution operation, and the drainage operation lamp is turned on during the drainage and makeup water injection operations. Thus, the command signal output by the signal output means 14 is notified separately, for example, the drainage operation lamp is turned on during the drainage operation, and the drainage operation lamp is blinked during the makeup water injection operation. Alternatively, the method of making the distinction notification by the display device 20 is appropriately set.

Further, instead of the display device 20, a buzzer or the like is provided to provide an informing device for distinguishing and informing the command signal output from the signal output means 14 to configure an electrode type water treatment device with a solution concentration detecting function. Good. Further, the notification device such as the display device 20 may be omitted. Then, for example, even if an external display device or the like is connected to the electrode-type water treatment device with a solution concentration detecting function in which the alarm device is omitted, the same effect as in the above-described embodiment can be obtained.

Further, in the above-described embodiment, the cooling tower is a circulation system provided with both the water replenishment control means 24 for replenishing and stopping the water supply and the blow control means 25 as the drainage means, and the signal output means 14 is Although the concentration adjustment command signal and the adjustment stop command signal are added to the water replenishment control unit 24 side, and the drainage command signal is added to the blow control unit 25 side, the signal output unit 14 is, for example, the concentration adjustment command signal and It is possible to omit the control of drainage by the drainage blow valve 19 by the blow control means 25, while the configuration is such that only the adjustment stop command signal is output.

Further, in the above embodiment, the voltage applying means for applying the voltage to the electrodes 5 and 6 is constituted so as to apply the rectangular polarity inversion voltage to the electrodes 5 and 6 as the polarity inversion driving means 9, but the voltage is applied to the electrodes 5 and 6. The applying means is not necessarily the polarity inversion driving means 9 for applying the rectangular polarity inversion voltage, and may be a voltage applying means for applying the polarity inversion voltage other than the rectangular shape or a voltage applying means for applying the DC voltage. Absent.

Further, in the above-mentioned embodiment, the voltage applied to the electrodes 5 and 6 is set to a constant voltage, and the change in the current value flowing between the electrodes 5 and 6 is detected by the solution concentration detecting means 13 to detect the electric conductivity of water. The scale component enrichment in water was detected by electrically detecting, but instead of making the voltage applied between the electrodes 5 and 6 a constant voltage, the value of the current flowing between the electrodes 5 and 6 is fixed, The electrical conductivity of water may be electrically detected by detecting the change in voltage at that time to detect the concentration of scale components in water.

Further, in the above embodiment, the solution concentration detecting means 13 is provided between the polarity reversing driving means 9 and the electrodes 5 and 6, but the solution concentration detecting means 13 is shown in FIGS. As shown by the broken line portion 23, the power supply circuit 10 and the rectangular pulse oscillation circuit 11
And the electric conductivity of water may be measured by measuring the power consumption (current) of the rectangular pulse oscillating circuit 11 between the electric current and the water.

Further, in the above-mentioned embodiment, the example of use in which the apparatus of this example is provided in the circulation pipe line 38 of the cooling tower has been described, but the apparatus of this example is used in various applications requiring reforming of water. For example, it may be provided in another circulation system such as a boiler, or may be mounted in various tanks and the like to reform the water in the tank. As described above, when the housing 4 is used by immersing it in a tank or the like containing water, as shown by a dotted line portion 12 in FIG.
The form of the housing 4 can be arbitrarily changed by providing a through hole 12 in the above to make it easy for water to flow in the electrode arrangement region.

Further, although the commercial power source is connected to the power source circuit 10 in the above embodiment, for example, a battery may be used as the power source instead of the commercial power source.

Further, in the present embodiment, the electrodes 5, 6 and the housing 4 were formed of stainless steel, but the materials of the electrodes 5, 6 and the housing 4 are not limited to stainless steel, and other materials may be used. Can be configured. Since the housing 4 and the electrodes 5 and 6 are used in the area around water, it is desirable that the housing 4 and the electrodes 5 and 6 be made of a material having corrosion resistance to water.

Further, although the electrodes 5 and 6 are provided in the housing 4 in the above embodiment, the electrodes 5 and 6 are not necessarily provided in the housing 4, and the housing 4 is omitted.
The electrodes 5 and 6 may be directly arranged to face a water pipe or the like such as a cooling tower. However, when the electrodes 5 and 6 are arranged in the housing 4 so as to face each other and the electrode type water treatment device with a solution concentration detecting function is unitized as in the above embodiment, when this device is installed in a circulation system such as a cooling tower, In addition, the device can be attached more easily.

[0062]

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to suppress the precipitation of scale components in water by applying a voltage to the electrodes, and to electrically concentrate the scale components in water by electrically detecting the electrical conductivity of water. The degree of concentration of scale components in water can be detected. Then, in response to the detected scale component enrichment, when the scale component enrichment in water reaches the preset enrichment upper limit value, the enrichment adjustment command signal is output,
In order to reduce the scale component enrichment by replenishing water in the circulation system by the rehydration control means of the circulation system,
It is possible to suppress scale deposition and prolong the life of the circulation system such as the cooling tower and the boiler, and it is possible to save maintenance work such as cleaning and replacement of the water pipe. Further, since there is almost no need to perform these maintenances, it is possible to improve the operating rate of the circulation system such as the boiler.

Further, according to the present invention, when the scale component enrichment in the water becomes equal to or lower than a preset lower limit of the preset enrichment, the replenishment control means stops the replenishment of water into the circulation system. By automatically performing the replenishment operation of water into the circulation system and the stop of the replenishment operation by, for example, the operator, for example, in the circulation system in accordance with the detected scale component concentration. Unlike the case of performing the water supply operation to the water and stopping the water supply operation, it can be prevented that the water supply operation and the supply stop operation take time.

Further, the circulation system has a drainage means,
The signal output means outputs a drainage command signal when the number of times the scale component enrichment detected by the solution enrichment detecting means reaches the preset enrichment upper limit value is one or more preset preset times or more, and the drainage command signal is output. According to the present invention in which the circulation system water is drained by means, the circulation system water is drained when the number of times the scale component enrichment reaches the set enrichment upper limit becomes equal to or greater than a preset number of times. Then, by replacing the water in the circulation system by injecting water using the replenishment control means or the like, the circulation by the replenishment control means in response to the concentration adjustment command signal and the adjustment stop command signal. Adjusting the scale component concentration in water in the circulation system is more efficient than performing the operation to reduce the scale component concentration in water simply by repeatedly supplying and stopping the supply of water to the system. It can be carried out the operation.

Further, according to the present invention, which is provided with the notifying means for distinguishing and notifying the command signal outputted by the signal output means, the person who uses the circulatory system can know the difference in the water in the circulatory system by the notifying means by the notifying means. It becomes possible to know the approximate enrichment such as whether the scale component enrichment has reached the set enrichment upper limit value or is less than or equal to the set enrichment lower limit value. When the set enrichment upper limit value is reached, it is possible to know that the operation of supplying water to the circulation system is being performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main configuration of an embodiment of an electrode-type water treatment device with a solution concentration detecting function according to the present invention.

FIG. 2 is an explanatory diagram showing a configuration example in which a cooling tower is provided with the electrode-type water treatment device with a solution concentration detection function of the above-described embodiment.

FIG. 3 is a flowchart showing a solution concentration adjusting operation of the above embodiment.

FIG. 4 is a cross-sectional configuration explanatory view showing an example of an electrode-type water treatment device previously proposed by the present applicant.

5 is an external explanatory view of the electrode-type water treatment device of FIG.

FIG. 6 is a block diagram showing a control device of an electrode-type water treatment device previously proposed by the applicant.

7 is an explanatory diagram showing a rectangular polarity inversion voltage waveform generated by the polarity inversion driving means 9 in FIG.

FIG. 8 is an explanatory view of a conventional electrode type water treatment device.

[Explanation of symbols]

 5, 6 Electrodes 8 Controller 13 Solution Concentration Detecting Means 14 Signal Output Means 15 Circulating Water Adjuster 20 Display 26 Memory Unit

Claims (5)

[Claims] 1. An electrode is arranged oppositely with a space in a water circulation system having a water replenishment control means for replenishing and stopping water replenishment, and a voltage applying means for applying a voltage to this electrode is provided to the electrode. An electrode-type water treatment device that suppresses the precipitation of scale components in water by applying a voltage, and a solution concentration detecting means for detecting scale component concentration in water by electrically detecting the electrical conductivity of water. And a preset enrichment upper limit value is given, and when the scale component enrichment detected by the solution enrichment detecting means reaches the preset enrichment upper limit value, a concentration adjustment command signal is output to output the replenishment water. An electrode-type water treatment device with a solution concentration detecting function, comprising signal output means for replenishing the circulation system with water by a control means to reduce the concentration degree of scale component in water. 2. An electrode is disposed oppositely with a space provided in a water circulation system provided with a water replenishment control means for replenishing and stopping water replenishment, and voltage applying means for applying a voltage to this electrode is provided to the electrode. An electrode-type water treatment device that suppresses the precipitation of scale components in water by applying a voltage, and a solution concentration detecting means for detecting scale component concentration in water by electrically detecting the electrical conductivity of water. And a set enrichment upper limit and a set enrichment lower limit are respectively given, and when the scale component enrichment detected by the solution enrichment detecting means reaches the set enrichment upper limit, the enrichment adjustment is performed. A command signal is output to replenish water in the circulation system by the water replenishment control means to reduce the scale component concentration in water, and when the detected scale component concentration is equal to or less than the set lower limit concentration, An electrode type water treatment device with a solution concentration detecting function, comprising signal output means for outputting an adjustment stop command signal for stopping replenishment of water into the circulation system by the water replenishment control means. 3. The circulation system has a drainage means, and the signal output means is preset such that the scale component enrichment detected by the solution enrichment detecting means reaches the set enrichment upper limit value at least once. The electrode-type water treatment device with a solution concentration detecting function according to claim 1, wherein a drainage command signal is output when the number of times exceeds a set number, and the water in the circulation system is drained by the draining means. 4. The circulation system has a drainage means, and the signal output means is preset such that the number of times that the scale component enrichment detected by the solution enrichment detecting means reaches the set enrichment upper limit value is one or more. When the number of times exceeds the set number, a drainage command signal is output, the water in the circulation system is drained by the drainage means, and then the water in the system is automatically replaced by injecting water into the circulation system by the water replenishment control means. The electrode type water treatment device with a solution concentration detecting function according to claim 1, wherein 5. The electrode-type water treatment device with a solution concentration detecting function according to claim 1, further comprising an informing means for informing the command signal outputted by the signal outputting means.