JPH05228475A - Water purification - Google Patents

Abstract

PURPOSE:To prevent algae from sticking to container by applying an alternating current to a space between the first submerged and the second submerged electrodes with the third submerged electrode grounded, then applying a direct current from the first submerged and the second submerged electrodes to the third submerged electrode, and lowering the standard oxidation/reduction potential of water through its electrolysis. CONSTITUTION:The first submerged, the second submerged and the third submerged electrodes 3A, 3B, 3C are arranged, and an alternating current is applied to a space between the first submerged and the second submerged electrodes 3A, 3B using the first and the second high-frequency switches 6A, 6B. In addition, the third submerged electrode 3C is grounded, and a direct current is applied to the third submerged electrode 3C from the first submerged and the second submerged electrodes 3A, 3B through a rectification action in water 2. Consequently, the water 2 is electrolyzed to lower the oxide-reduction potential of the water 2. Thus, some of organic chemical compounds in the water 2 are gasified and leak out, while the others settle down. The supernatant becomes clean sterilized water. Further, it is possible to prevent calcium from sticking to a container, and algae from attaching to it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water reforming method capable of reforming so-called bad water such as industrial wastewater or river water.

[0002]

2. Description of the Related Art Conventionally, industrial wastewater has been reformed by adding chemicals.

[0003]

However, the method of using chemicals or the like has a problem of high cost.

An object of the present invention is to provide a water reforming method capable of reforming bad water at low cost.

[0005]

The means of the present invention for achieving the above object will be described below.

In the method for reforming water according to the first aspect, the first, second and third electrodes are arranged in water, an alternating current is applied between the first and second electrodes, and the third electrode Is grounded, a direct current is caused to flow from the first and second electrodes to the third electrode by the rectifying action of the water, and the water is electrolyzed to lower the redox potential of the water. And

According to a second aspect of the present invention, there is provided a water reforming method, wherein first, second, third and fourth electrodes are arranged in water and an alternating current is applied between the first and second electrodes, The third and fourth electrodes are grounded alternately with a low cycle and the non-grounded electrode is set to a positive potential, and the third and fourth electrodes are grounded.
Alternatively, a direct current is applied to the fourth electrode by the rectifying action of the water to electrolyze the water to lower the redox potential of the water.

[0008]

According to the first aspect, when an alternating current is applied between the first and second electrodes in water and the third electrode in water is grounded, water is transferred from the first and second electrodes to the third electrode. DC current flows due to the rectifying action of, and the water is electrolyzed. As a result, bubbles are generated in the water, and the standard oxidation-reduction potential of water is lowered to the reduction potential. The resulting water has several times the amount of dissolved oxygen,
Electric conductivity decreases.

By this treatment, some of the organic compounds in the water are gasified, and others are precipitated.
Clear water is clean water. Also, this water becomes sterilized water. Further, if this treatment is carried out, it is possible to prevent the adhesion of calcium to the container and the like, and also prevent the adhesion of algae.

When the third and fourth electrodes are used, the electrodes are alternately arranged at a low cycle, and the electrode which is not grounded is positively charged, the third and fourth electrodes are used.
It is possible to prevent the adhered matter from adhering to the fourth electrode.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a first embodiment of a water reforming apparatus used in the present invention. In the figure, 1 is a container,
Reference numeral 2 is water in the container 1, and 3A, 3B and 3C are first, second and third electrodes arranged in the water 2. The third electrode 3C is grounded via the switch 4. 5 is 10V to 50V
The DC power supplies 6A and 6B are connected to the DC power supply 5 through the variable resistor 7, respectively, and convert the DC voltage from the DC power supply 5 into high-frequency alternating current to generate the first and second electrodes 3A,
It is the 1st, 2nd high frequency switch which gives to 3B by turns. These first and second high frequency switches 6A and 6B are
It is composed of transistors 8A, 9A and 8B, 9B. Reference numeral 10 is a capacitor connected between the first and second electrodes 3A and 3B.

Reference numeral 11 is a first and second high frequency switch 6A,
6B is a high-frequency switching command circuit including a flip-flop circuit that gives a high-frequency switching command via resistors 12A and 12B.
It is a high frequency oscillator that gives a high frequency signal of KHz.

Next, a method of reforming water using such an apparatus will be described. Container 1 containing water 2 such as industrial wastewater
A high frequency alternating current of 30 KHz to 50 KHz at a voltage of 10 V to 50 V is alternately applied to the first and second electrodes 3A and 3B by the action of the first and second high frequency switches 6A and 6B. Such a high-frequency alternating current supplies a high-frequency signal from the high-frequency oscillator 13 to the high-frequency switching command circuit 11, and a high-frequency switching command from the high-frequency switching command circuit 11 to the first and second high-frequency switches 6A and 6B. It is formed by turning on and off the first and second high frequency switches 6A and 6B at a high cycle, and alternately applying the output from the DC power source 5 to the first and second electrodes 3A and 3B.

At this time, the AC voltage appearing between the first and second electrodes 3A and 3B is shown in FIG. The peak value of these AC voltages is determined by the variable resistor 6.

When high-frequency alternating current is applied to the first and second electrodes 3A and 3B in this manner, the electrodes 3A and 3 are formed on the first and second electrodes.
A direct current alternately flows between B and the third electrode 3C by the rectifying action of water, from the first electrode 3A to the third electrode 3C and from the second electrode 3B to the third electrode 3C.

As a result, the water 2 is electrolyzed, and within a few minutes the water 2
Bubbles are generated inside, electrons flow through the third electrode 3C to the ground side, and the standard oxidation-reduction potential of water 2 is, for example, +300 m.
It drops from V to -200mV to -300mV in a few hours,
It becomes the reduction potential.

In the water 2 treated in this way, the amount of dissolved oxygen increases by about 10% and the electric conductivity decreases to about several%.

When industrial wastewater is treated, some of the organic compounds are gasified and others are precipitated on the bottom side of the container 1. Therefore, the supernatant may be used, the separation is easy, and the size and weight of the device and the cost can be reduced. The precipitated organic compound may be occasionally removed by cleaning, which facilitates maintenance. It was also found that the COD value was reduced to several tens of minutes.

The electrolysis of water by a normal DC voltage is 1
It is performed by passing a current of about 5 A to 10 A at a voltage of 4.7 V, but the electrolysis of water of the present invention is 500 mA to 600 at an effective value of 15 V (peak value of 30 V to 40 V).
Since it is performed with a current of mA, the power consumption is only a few tenths, and energy saving can be achieved.

The treated water obtained by the method of the present invention has a stable electronic bond, and thus is good for biological reactions.

It has been found that in the method of the present invention, when water is treated, calcium dissolves in the water, so that the adhesion of calcium can be prevented.

When the water treatment of the present invention is carried out in the water receiving tank, the water receiving tank and the water distribution pipe can be prevented from rusting, and adhesion of algae can be prevented. Also, bathing with the resulting water makes the skin smooth.
In addition, you can bathe in a hot bath without feeling the heat so much that your body gets warm.

When the water in the pool was treated by the method of the present invention, the residual chlorine content remained almost unchanged, but the chlorine odor disappeared in 3 to 4 days, and the COD value in the water decreased after 4 to 5 days. So it became good water for the body.

In the case of making a lotion, if the standard redox potential is made negative and then oil is added and dissolved in water, a lotion containing oil can be prepared without using a chemical agent such as an emulsifier. Gives a smooth skin lotion on your skin. Since this lotion is made of water that does not rot, it is not inferior and has a low surface tension.

Further, this water has an anesthetic effect, and itching,
I can relieve the pain. It is also effective against atopic dermatitis and athlete's foot.

The water reforming method of the present invention can adjust only the standard redox potential without changing the pH value. That is, when the switch 4 is turned off, the standard oxidation-reduction potential can be raised, and when the switch 4 is turned on, the oxidation potential can be lowered. This is different from the conventional DC electrolysis.

Therefore, pools, baths, industrial circulating water,
It can be used for various purposes because it can be used for different purposes such as COD reduction in water receiving tanks, sterilization, rust prevention, etc., or can be switched over time. For example, in the case of sterilizing a pool, if the standard oxidation-reduction potential is made positive and then negative, precipitation of calcium and rust can be prevented. Since there are anaerobic and aerobic bacteria, it can be dealt with by modifying the water with both characteristics.

In the first embodiment, the container 1 can also be used as the third electrode by forming the container 1 from metal and grounding it.

FIG. 3 shows a second embodiment of the water reforming apparatus used in the present invention.

The parts corresponding to those of the first embodiment described above are designated by the same reference numerals. In the figure, 3D is a fourth electrode, which is arranged to face the water 2 together with the first to third electrodes 3A to 3C as illustrated. 14
A, 14B are third, fourth electrode 3C, low-frequency switches for grounding at low cycle 3D alternately 15 a high frequency signal 30KHz~50KHz the high-frequency oscillator 13, for example, ^{1/2 14-divided} The low frequency switching command to the resistor 16A,
It is a low frequency switching command circuit which is given to the low frequency switches 14A and 14B via 16B. Reference numerals 17A and 17B are low frequency switching command circuits which are provided to the low frequency switches 14A and 14B, which are transistors. Reference numerals 17A and 17B are resistors that connect the collectors of the low-frequency switches 14A and 14B formed of transistors to the positive side of the DC power supply and hold the third or fourth electrodes 3C and 3D at a positive potential when the switches are turned off.

In this embodiment, the first and second electrodes 3A, 3
In the same manner as in the first embodiment, B is 30 at a voltage of 10V to 50V.
A high frequency alternating current of KHz to 50 KHz is alternately applied by the action of the first and second high frequency switches 6A and 6B.

On the other hand, the low-frequency switches 14A and 14B are supplied with a low-frequency signal by the low-frequency switching command circuit 15, and the low-frequency switches 14A and 14B are alternately turned on in a low cycle, whereby the third, fourth and third switches are turned on. The electrodes 3C and 3D are alternately grounded. The electrode 3C or 3D that is turned off has a resistance of 1
Hold at positive potential via 7A or 17B.

By doing so, the direct current is alternately applied to the third or fourth electrode 3C, 3D from the electrodes 3A, 3B between the first and second electrodes to which the high frequency alternating current is alternately applied by the rectifying action of water. It will flow.

If the non-grounded third or fourth electrode 3C, 3D is set to a positive potential, adhesion of dust such as calcium to the electrode surface can be prevented and maintenance becomes easy.

The container 1 may be a water channel such as a pipe. In this case, the electrodes 3A to 3D may be elongated in the water flow direction.

In the above embodiment, the case where a high frequency alternating current is applied to the first and second electrodes has been described, but the same applies even when a low frequency alternating current is applied to these first and second electrodes. The effect of can be obtained. However, when used in a bath, it is preferable that the frequency is higher because the human body does not feel the electricity.

[0038]

As described above, according to the water reforming method of the present invention, the following effects can be obtained.

According to the first aspect of the invention, an alternating current is applied between the first and second electrodes in water and the third electrode in water is grounded. Therefore, the first and second electrodes are changed to the third electrode. A direct current flows due to the rectifying action of water, the water is electrolyzed, and the standard redox potential of water can be lowered. When the water is treated in this way, the COD value of the water is lowered, some of the organic compounds in the water are gasified and eliminated, and other of the organic compounds can be removed by precipitation. Further, it is possible to prevent rusting of metal in water, prevent adhesion of calcium, prevent adhesion of algae, prevent water from spoiling, and remove chlorine odor while leaving the effect of chlorine. In particular, there is an advantage that even low-cost equipment can be easily modified with industrial wastewater.

According to the second aspect of the present invention, there is an advantage that an object can be prevented from adhering to not only the first and second electrodes but also the third and fourth electrodes, which facilitates maintenance.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of a water reforming apparatus according to a first embodiment of the present invention.

FIG. 2 is a waveform diagram of high frequency alternating current applied to the first and second electrodes in the first embodiment.

FIG. 3 is an electric circuit of a water reformer according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Container 2 Water 3A-3D 1st-4th Electrode 4 Switch 5 DC Power Supply 6A, 6B 1st, 2nd High Frequency Switch 10 Capacitor 11 High Frequency Switching Command Circuit 13 High Frequency Oscillator 14A, 14B Low Frequency Switch 15 Low Frequency Switching Command circuit 17A, 17B resistance

Claims (2)

[Claims] 1. A first electrode, a second electrode, and a third electrode are arranged in water, and an alternating current is applied between the first electrode and the second electrode, and the third electrode is applied.
Is grounded, a direct current is caused to flow from the first and second electrodes to the third electrode by the rectifying action of the water, and the water is electrolyzed to lower the redox potential of the water. Water reforming method. 2. A first electrode, a second electrode, a third electrode, and a fourth electrode are arranged in water, an alternating current is applied between the first and second electrodes, and the third and fourth electrodes are subjected to a low cycle. While alternately grounding, the electrodes that are not grounded are made to have a positive potential, and a DC current is caused to flow from the first and second electrodes to the grounded third or fourth electrode by the water rectifying action. A method for reforming water, which comprises electrolyzing water to lower the redox potential of the water.