JP4605694B2 - Water quality improvement method and electrolyzed water generating apparatus in electrolyzed water generation - Google Patents

Description

  The present invention relates to a method for improving water quality and an electrolyzed water generating apparatus in electrolyzed water generation in which tap water and other water to be treated are introduced into an electrolytic cell to simultaneously treat water purification by AC electrolysis and activated carbon filtration.

  Conventionally, as a device for improving water quality such as tap water, a method of filtering with activated carbon or a method of decomposing water molecules by electrolysis is known. Recently, devices that use magnets to improve the quality of water by applying magnetic field lines have been put into practical use. However, these devices are difficult to use for a long period of time, and the magnetic field lines that have a low "Gauss" indicating the strength of the magnet and those that use a ring-shaped inner side have a demagnetizing action and improve water quality. There was a problem of lack of the effect.

Today, products called electrolyzed water generators are available on the market, most of which are electrolysis systems with a diaphragm between the yin and yang electrodes, which decomposes alkali water and acidic water to discharge water ( For example, see Patent Document 1.)
JP-A-6-312186

  However, changing the pH of the raw water produces a medical effect, but it must be drunk under the control of the Pharmaceutical Affairs Law, and there is a problem that all unspecified consumers cannot drink.

In addition, this type has a problem that calcium and magnesium adhere to the electrode plate while electrolyzing water continuously, so that the electrolytic capacity decreases. After a certain period of electrolysis, when draining the residual water of the electrolytic cell, the electrolytic polarity is switched (the positive and negative poles are reversed) to prevent the adhesion of calcium and magnesium (so-called reverse) There was a proposal of "electrolytic cleaning." (For example, refer patent document 2).
JP 2001-205268 A

  However, when the polarity is switched after the generation is completed, the effect is weak unless the generation time and the cleaning time are the same, and the normal electrolysis time is used for a longer time, so that there is a problem that complete cleaning cannot be achieved.

Under such circumstances, there has been a proposal of a method of performing electrolysis and cleaning simultaneously by reversing the polarity or reversing the water discharge valve when performing electrolysis again after performing electrolysis for a certain time (for example, (See Patent Document 3).
Japanese Patent Laid-Open No. 6-233982

  However, here again, the time of the previous electrolysis and the time of the current electrolysis are not the same, and there is a problem that the use polarity of the electrolysis is biased depending on the frequency and time of use by the user.

  Further, in the electrolysis tank, since the conventional water flow is not evenly contacted with the electrode plate evenly, there is a problem that a water path is formed, leading to a decrease in the life of the electrode plate and a decrease in electrolysis ability.

  Moreover, in the electrolysis-type water quality improvement apparatus, the electrolytic cell and the water purification tank are divided, and the space of at least two tanks is increased and it is economically expensive.

  Therefore, calcium, magnesium, and hydrogen and oxygen bubbles adhering to the electrode surface during electrolysis are prevented from lowering the electrolysis efficiency, and the current voltage during electrolysis is not only between the electrodes but also within the electrodes. It is required to generate electrolyzed water stably by applying a current voltage, without interrupting the water flow, and changing the pH of the raw water almost to alkaline or acidic. Here, the electrolyzed water is preferably purified water from which impurities (particularly chlorine) contained in the water to be treated (tap water) are removed.

  The present invention has been made in view of such circumstances, solves the above problems, introduces tap water and other water to be treated into an electrolytic cell, and simultaneously treats water purification by AC electrolysis and activated carbon filtration. The present invention provides a water quality improving method and an electrolyzed water generating device in electrolyzed water generation.

  In order to solve the problem, the present invention is a water quality improvement method in electrolyzed water generation in which tap water or other treated water is introduced into a cylindrical electrolytic cell, and purification by alternating current electrolysis and filtration is performed simultaneously. At least one of the yin and yang electrodes connected to the power source is formed with a porous electrode made of cylindrical compressed activated carbon and is arranged concentrically with respect to the other electrode. And the electrolysis is carried out while periodically or intermittently reversing the polarity applied to the yin and yang electrodes. Here, there may be a case where two types of alternating currents having a high frequency of several tens of kHz or more and a low frequency of several Hz or more are added to each of the yin and yang electrodes while being appropriately modulated.

Also, an electrolyzed water generating device that introduces tap water and other water to be treated into a cylindrical electrolytic cell, and performs purification by alternating current electrolysis and filtration treatment simultaneously,
At least one of the yin and yang electrodes connected to the dc power source forms a porous electrode made of cylindrical compressed activated carbon, and is disposed concentrically with respect to the other electrode, and the application between the dc power source and the yin and yang electrode It has a polarity inversion circuit that inverts the polarity periodically or intermittently, and appropriately modulates two types of alternating current consisting of a high frequency of several tens of kHz or more and a low frequency of several Hz or more for each negative and positive electrode. While having an electrolytic current control means including a modulation circuit that is added in a superimposed manner, water to be treated is introduced into the tank, and AC electrolysis is performed while passing through the porous electrode. It is.

  According to this invention, it is possible to have a filtration filter by using a porous electrode made of compressed activated carbon that is molded (shaped) by adding fibrous activated carbon or coconut shell activated carbon and acrylic fiber as the yin and yang electrode. it can.

  In addition, this porous electrode filters impurities such as chlorine contained in water and electrolyzes water to lower the oxidation-reduction potential to prevent water oxidation.

  Furthermore, it is not necessary to clean the electrodes by continuously reversing the positive and negative polarity of the applied polarity during the generation without temporarily interrupting the generation of the electrolyzed water. Therefore, electrolyzed water can be discharged continuously.

  In addition, cleaning and electrolyzed water are equally generated regardless of the use time and frequency, and adhesion of calcium and magnesium and hydrogen and oxygen bubbles on the electrode surface can be prevented.

  In addition, since the porous electrode forms various water channels (activated carbon holes), the current crosses not only between the electrodes but also within the electrodes, and electrolysis occurs. Therefore, the electrolytic efficiency can be increased.

  In addition, production costs are reduced and the lifetime of the filtration capacity of the compressed activated carbon makes it possible to perform regular replacements so that it is always clean.

  A porous electrode made of cylindrical compressed activated carbon is made by adding a non-corrosive metal electrode terminal to a molded activated carbon fiber or coconut shell activated carbon and acrylic fiber. The filter and the electrode are combined.

  In the case of constituting a single cylindrical electrode [Embodiment 1 described later], a rod-shaped electrode made of a non-corrosive metal material such as stainless steel or titanium is formed in the hollow portion (center of the electrolytic cell) of the porous electrode which is one of the yin and yang electrodes. Alternatively, a plate-shaped metal electrode is placed to form the other side of the yin and yang electrode, and water to be treated is introduced from the outside of the porous electrode, and the yin and yang electrode is applied while passing through the center of the tank (metal electrode side). AC electrolysis that reverses the polarity and activated carbon filtration are synergistically performed to supplement the purification of electrolyzed water.

  The yin and yang electrode is connected to a DC power source through a polarity inversion circuit. Normally, a direct current of 0.1 A or higher (DC voltage of 1 V or higher) is applied, and the applied polarity is reversed at regular intervals via a polarity reversal circuit without interrupting the generation of electrolyzed water (AC electrolysis), so continuous operation However, there is no fear of electrode contamination that inevitably occurs in the case of direct current electrolysis.

  In addition, between the yin and yang electrodes, a core material (partition wall) is provided in contact with the porous electrodes so as not to contact each other. A suitable core material is a porous pipe made of resin, in which a large number of water passage holes are formed on a cylindrical wall surface.

  In addition, in the case of a multi-cylindrical electrode [Example 2 described later], a plurality of porous electrodes similar to the above are arranged in a concentric radial direction of a cylindrical electrolytic cell through a partition wall to alternately form yin and yang electrodes. To do.

  Optimally, two types of alternating currents having a high frequency of several tens of kHz or more and a low frequency of several Hz or more are added in a superimposed manner to each of the porous electrodes having the above-described configuration while appropriately modulating them. Thereby, the to-be-processed water which passes the inside of a porous electrode receives this influence (modulation electric field). As shown in the block diagram for explaining the electrolytic current control system in FIG. 5, the electrolytic current control means including a modulation circuit [in FIG. 5 described later, symbol (r)] is replaced with the microcomputer [in FIG. [Usage (U)].

  Electrolysis is performed while impurities such as chlorine are filtered to reduce the oxidation-reduction potential to prevent water oxidation, and the electrolytic efficiency is reduced by the bubbles of calcium, magnesium, and hydrogen and oxygen that adhere to the electrode surface during electrolysis. It is trying to prevent lowering. Moreover, since the electrode area is large, there is also an advantage that electrolyzed water can be stably generated without blocking the water flow.

  An embodiment of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional explanatory view of an embodiment apparatus (hereinafter referred to as a single cylinder apparatus) configured with a single cylinder electrode.

  FIG. 2 is an explanatory view in plan view of the single cylindrical device.

  As shown in the figure, the single cylindrical device (X) is a rod-shaped device made of a non-corrosive metal material formed from a fibrous activated carbon and / or coconut shell activated carbon and an acrylic fiber or other chargeable fiber as a molding material. Alternatively, a porous electrode (a) with a plate-like electrode terminal (c) inserted therein and a non-corrosive metal electrode (b) at the center of the cylindrical electrolytic cell (f) are disposed on a concentric circle. The single electrode (a) (b) is configured by holding the porous electrode (a) separately, and water to be treated is introduced into the tank outside the single tube electrode (a) (b), Electrolyzed water that has been purified by passing through the inner hollow portion (e described later) is taken out.

  Here, the separation holding is an interposition of the partition wall, and the core material is inscribed in the porous electrode (a). A large number of water passage holes are formed on the cylindrical wall surface of the core material (described later).

  The electrolytic cell is formed as a water purification cylinder (f) having a hollow inside, and an IN-side water injection port (10) for raw water (treated water) is formed on the side wall of the electrolytic cell. A quality electrode (a) is provided.

  Furthermore, a non-corrosive metal electrode (b) is erected in the hollow part (center of the electrolytic cell) inside the porous electrode (a), and contact between these electrodes (a) and (b) is prevented. It is spaced apart (held) to avoid it. Here, it is preferable that the separation is maintained by inscribed a cylindrical core material (d) on the inner wall of the porous electrode (a) to form a partition wall. Specifically, a porous pipe (d) made of a non-corrosive metal or resin having a fibrous shape, a mesh shape, and a large number of water passage holes is provided.

  The thickness of the cylindrical wall of the porous pipe (d) is thin, and the drainage guide (e) is formed in the cylinder (inner space). This is because the purified and generated electrolyzed water is allowed to pass and guided to the OUT side water supply port (11).

  Therefore, first, the raw water (treated water) is poured from the IN side water inlet (10) into the water purification cylinder (f), and the treated water moves (permeates through) in the direction of the arrow (g) in FIG. .

  At this time, when passing through the porous electrode (a), it is affected by the current and voltage applied to the metal electrode (b) while removing chlorine and impurities contained in the water.

  Furthermore, the to-be-processed water which passed the porous electrode (a) moves to the metal electrode (b) side, and becomes purified electrolyzed water.

  And it drains to the OUT side (11) through the drainage guide (e) which is the inner space of the core material (porous pipe d).

  Here, a direct current of 0.2 to 1.5 A (DC voltage of 5 to 36 V) is applied to the porous electrode (a) and the metal electrode (b) from the DC power source (s), and the negative and positive electrodes (a (B) is configured such that the polarity can be reversed at regular intervals by the polarity reversing circuit (14).

  In addition, while appropriately modulating two types of alternating currents consisting of a high frequency of several tens of kHz or more and a low frequency of several Hz or more via an electrolytic current control means (r) including a modulation circuit mounted on the microcomputer (U). They are added in a superimposed manner. Thereby, a high frequency and a low frequency are applied to the porous electrode (a), and an electromagnetic field is generated in the activated carbon hole inside.

  Therefore, when the water to be treated flows in the direction (g) and passes through the inside of the porous electrode (a), the water molecules are vigorously vibrated under the influence of the applied high frequency and low frequency.

  Further, water is electrolyzed between the porous electrode (a) and the metal electrode (b) to generate hydrogen ions and hydroxide ions.

  Furthermore, when the water to be treated passes through the activated carbon pores of the porous electrode (a), it is affected by high and low frequencies, and the electrolyzed water has a higher reducing power and changes to water with a small molecular group.

  Another embodiment of the present invention will be described below with reference to the accompanying drawings. Constituent elements that are the same as those of the single cylinder apparatus described in the first embodiment are denoted by the same reference numerals.

  FIG. 3 is a cross-sectional explanatory view of an embodiment device (hereinafter referred to as a “multi-tubular device”) having a multi-tubular electrode.

  FIG. 4 is an explanatory diagram in plan view of the multiple cylindrical device. The arrow (k) in the figure indicates the flow direction of the water to be treated.

  As shown in the figure, the multi-cylindrical device (Y) is a rod-shaped device made of a non-corrosive metal material formed from a fibrous activated carbon and / or coconut shell activated carbon and an acrylic fiber or other charging fiber as a molding material. Alternatively, a porous electrode (a) having a plate-like electrode terminal (c) inserted therein is arranged in a multiplex manner on the radial concentric circle from the center of the cylindrical electrolytic cell via a partition wall, and multiple cylindrical electrodes (a, a ′ The water to be treated is introduced into the tank outside the outermost cylinder of the multi-tubular electrode (a, a ') and passed through the hollow part inside the innermost cylinder for purification. Electrolyzed water is taken out. The illustrated multiple cylinder device has a double cylinder configuration, but may be configured in a triple cylinder shape or a five cylinder shape.

  Here, the partition wall is an insulating core material (d) having a large number of water passage holes formed on a cylindrical wall surface, and preferably a resinous porous pipe is used. A core material (porous pipe d) is inscribed in each porous electrode (a, a ′) to ensure non-contact between the electrodes (a, a ′).

  A hollow portion inside the innermost cylinder is a discharge guide (e).

  The configuration of each porous electrode (a, a ′) is the same as that in the single-cylinder apparatus of the first embodiment.

It is sectional view explanatory drawing of the single cylinder apparatus which is one Example. It is a plane view explanatory drawing similarly. It is sectional view explanatory drawing of the multiple cylindrical apparatus which is another Example. It is a plane view explanatory drawing similarly. It is a block diagram explaining an electrolysis current control system.

Explanation of symbols

(A) Porous electrode [cylindrical compressed activated carbon electrode]
(A ') Porous electrode [cylindrical compressed activated carbon electrode]
(B) Metal electrode (c) Electrode terminal (d) Porous pipe [core material]
(E) Drainage guide (f) Water purification cylinder [electrolyzer]
(G) Direction of water flow (k) Direction of water flow (10) IN side water inlet (11) OUT side water inlet (12) Power transmission cord (13) Power transmission cord (14) Polarity inversion circuit (switching unit A)
(S) DC power supply (r) modulation circuit [electrolytic current control means]
(U) Microcomputer (X) Single cylinder device (first embodiment device)
(Y) Multiple cylindrical apparatus (second embodiment apparatus)

Claims (7)

Water quality improvement method in electrolyzed water generation in which tap water or other treated water is introduced into a cylindrical electrolytic cell and purification by alternating current electrolysis and filtration treatment is performed simultaneously.
At least one of the yin and yang electrodes connected to the DC power source is formed with a porous electrode made of cylindrical compressed activated carbon, and is disposed concentrically with respect to the other electrode. Electrodes are passed through the electrodes and the polarity applied to the yin and yang electrodes is reversed periodically or intermittently , and for each yin and yang electrode, a high frequency of several tens of kHz or more and a low frequency of several Hz or more A method for improving water quality in electrolyzed water generation, characterized in that two types of alternating currents are added in a superimposed manner while being appropriately modulated. Porous electrode is made of fibrous activated carbon and / or coconut shell activated carbon and acrylic fiber or other chargeable fiber as molding material, and rod-shaped or plate-shaped electrode terminals made of non-corrosive metal material are inserted. And
A non-corrosive metal electrode is arranged in the center of the cylindrical electrolytic cell, and the porous electrode is separated and held on a concentric circle to constitute a single cylindrical electrode, and outside the single cylindrical electrode. the treated water is introduced in the tank, the water quality improving method in the electrolytic water generation according to claim 1, wherein they were taken out of the electrolytic water generated purified by passing through the interior of the part. Porous electrode is made of fibrous activated carbon and / or coconut shell activated carbon and acrylic fiber or other chargeable fiber as molding material, and rod-shaped or plate-shaped electrode terminals made of non-corrosive metal material are inserted. And
A multi-tubular electrode is configured by arranging the porous electrodes in multiple radial concentric circles from the center of the cylindrical electrolytic cell via partition walls, and the outer side of the outermost cylinder of the multi-tubular electrode is processed. The method for improving water quality in electrolyzed water production according to claim 1 , wherein water is introduced into the tank and the electrolyzed water purified and produced by passing it through a hollow portion inside the innermost cylinder is taken out. An electrolyzed water generating device that introduces tap water and other treated water into a cylindrical electrolytic cell, and performs purification by alternating current electrolysis and filtration treatment simultaneously,
At least one of the yin and yang electrodes connected to the direct current power source is formed as a porous electrode made of cylindrical compressed activated carbon and is arranged concentrically with respect to the other electrode, and the polarity of the yin and yang electrode is changed periodically or intermittently. Modulation that has a polarity reversal circuit that inverts the signal and adds two types of alternating currents of a high frequency of several tens kHz or more and a low frequency of several Hz or more to each of the negative and positive electrodes while appropriately modulating them. An electrolyzed water generating apparatus comprising electrolysis current control means including a circuit, wherein water to be treated is introduced into a tank and AC electrolysis is performed while passing through the porous electrode. A rod-shaped or plate-shaped porous electrode made of cylindrical compressed activated carbon is formed from fibrous activated carbon and / or coconut husk activated carbon and acrylic fiber or other chargeable fiber as a molding material, and made of a non-corrosive metal material. The electrode terminal is inserted and
A non-corrosive metal electrode is arranged in the center of the cylindrical electrolytic cell, and the porous electrode is separated and held on a concentric circle to constitute a single cylindrical electrode, and outside the single cylindrical electrode. The electrolyzed water generating apparatus according to claim 4 , wherein the water to be treated is introduced into the tank, and the electrolyzed water purified and generated by passing the water into the inner hollow portion is taken out. Porous electrode is formed with fibrous activated carbon and / or coconut shell activated carbon and acrylic fiber or other chargeable fiber as a molding material, and a rod-shaped or plate-shaped electrode terminal made of a non-corrosive metal material is inserted. And
A multi-tubular electrode is configured by arranging the porous electrodes in multiple radial concentric circles from the center of the cylindrical electrolytic cell via partition walls, and the outer side of the outermost cylinder of the multi-tubular electrode is processed. 5. The electrolyzed water generating device according to claim 4 , wherein water is introduced into the tank and the purified electrolyzed water is taken out by passing it through a hollow portion inside the innermost cylinder. The electrolyzed water generating apparatus according to claim 6 , wherein the partition wall is an insulating core material and a plurality of through holes are formed in the cylindrical wall surface.

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