JP2003039068A - Electrolytic water producing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolytic water producing apparatus capable of preventing the discharge of acid water, which tends to be disposed, with a relatively simple structure. SOLUTION: This electrolytic water producing apparatus A is provided with an electrolysis vessel 1 where the inside of the vessel is divided into partitioned parts 12, 13 by an electrolytic diaphragm (a neutral membrane) 11 and electrode plates 14, 15 are disposed in the partitioned parts 12, 13, and a voltage apply means 3 for applying direct-current voltage between the electrode plates 14, 15. Raw water 10 is introduced into the partitioned parts 12, 13, producing alkaline water 19 in the partitioned part 13, and the acid water 17 in the partitioned part 12. In the electrolytic water producing apparatus A, a modifier 2 is installed for changing the acid water 17 into alkaline modified water 38.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electrolyzed water producing apparatus for producing electrolyzed water.

[0002]

2. Description of the Related Art Acidic water and alkaline water are generated by using an electrolytic cell in which an acidic water generating portion in which a positive electrode is arranged and an alkaline water generating portion in which a negative electrode is arranged are divided by an electrolytic diaphragm. An electrolyzed water generator (conventional technique 1) has been conventionally known.
In addition, an electrolyzed water generator (prior art 2) that generates only alkaline water using an anion exchange membrane is also known.

[0003]

The electrolyzed water producing apparatus of the prior art 1 described above is not economical because it produces the same amount of acidic water as alkaline water (which is rarely used). Moreover, in the electrolyzed water generator of the above-mentioned conventional technique 2, the anion exchange membrane,
An electrolysis promoting aid and a flow rate sensor are required, and complicated control is required.

An object of the present invention is to provide an electrolyzed water producing apparatus having a relatively simple structure and preventing discharge of acidic water which tends to be discarded water.

[0005]

[Means for Solving the Problems] [Claim 1] The electrolytic cell is divided into two compartments by an electrolytic diaphragm.
An electrode is arranged in each partition.

When a DC voltage is applied between the electrodes by the voltage application means and raw water is introduced into each partition, acidic electrolyzed water is generated in the partition on the side to which a positive voltage is applied to the electrodes, and negative water is applied to the electrodes. Alkaline electrolyzed water is generated in the compartment on the side to which the voltage is applied.

From the compartment on the side where a positive voltage is applied to the electrode, acidic electrolyzed water, which is easily discarded as waste water, is discharged, and the reformer reforms this acidic electrolyzed water to neutral or alkaline. Reform into quality water. This reformed water may be used as it is, or may be used by mixing it with alkaline electrolyzed water. As a result, the electrolyzed water generation device can prevent discharge of the acidic water, which tends to be discarded water, with a relatively simple configuration.

[Claim 2] The reformer is one in which one or a plurality of melts containing magnesium as a main component are placed in a reforming tank.

In an acidic to neutral aqueous solution, the solution raises the pH of the aqueous solution by vigorous spontaneous dissolution. As a result, the acidic electrolyzed water discharged from the compartment on the side where a positive voltage is applied to the electrode is reformed into neutral or alkaline reforming water. Then, when the aqueous solution becomes alkaline, Mg (O
H) ₂ is mainly formed to stabilize and stop spontaneous dissolution.

[Claim 3] The reformer includes a reforming tank, first and second electrode plates arranged in the reforming tank so as to face each other.
One or more intermediate electrode plates mainly composed of magnesium, which are arranged to face each other between the first and second electrode plates;
And a voltage application unit for reforming that applies a DC voltage between the second electrode plates.

When a DC voltage is applied between the first and second electrode plates, a potential difference is generated between the adjacent electrodes, so that Mg ²⁺ ions are dissolved from the intermediate electrode plate and OH ⁻ and The reaction produces Mg (OH) ₂ which mixes with water. As a result, the acidic electrolyzed water discharged from the compartment on the side where a positive voltage is applied to the electrode is reformed into neutral or alkaline reforming water.

If the first and second electrode plates are made of a noble metal, it is possible to prevent the consumption of the first and second electrode plates due to melting. Further, if the first and second electrode plates are also mainly made of magnesium, the reforming efficiency is improved.

[Claim 4] The acidic water outlet of the electrolyzer and the inlet of the reformer are connected through an acidic water pipe, and an alkaline water pipe having an upstream end connected to the alkaline water outlet of the electrolyzer is provided on the way. The downstream end of the reforming water pipe whose upstream end is connected to the outlet of the reformer is connected. As a result, the discharge port of the alkaline water can be located at one place.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment of the present invention (corresponding to claims 1, 3, and 4) will be described with reference to FIG. As shown in FIG. 1, the electrolyzed water producing apparatus A includes an electrolyzer 1 for producing alkaline water and acidic water, a reformer 2 for reforming acidic water to be alkaline, and voltage applying means 3, 4. .

In the electrolytic cell 1, the casing 100 is made of an electrically insulating material resistant to acids and alkalis, and has a hollow rectangular parallelepiped shape. An electrolytic diaphragm 11 (neutral membrane) is arranged in the center of the electrolytic cell 1 to divide the inside of the electrolytic cell into compartments 12 and 13.

The same amount of raw water 10 is introduced into the compartments 12 and 13 from the upper part of the electrolytic cell 1. Then, the electrode plate 14 is vertically arranged in the vicinity of the inner wall of the partition portion 12 on the tank side.
The electrode plate 15 is vertically arranged near the inner wall of the tank 3 of FIG.

The electrode plates 14 and 15 are made of platinum titanium, and a DC voltage (Max 17 V) is applied by the voltage applying means 3. In normal operation for 20 minutes, a positive voltage is applied to the electrode plate 14 and a negative voltage is applied to the electrode plate 15. As a result, the following reactions occur on the anode side and the cathode side to generate acidic water and alkaline water, the acidic water 17 is discharged from the acidic water pipe 16, and the alkaline water 1 is discharged from the alkaline water pipe 18.
9 discharges.

Electrode plate 14 (anode side) Cl ⁻ ions, SO ₄ ²⁻ ions and the like contained in raw water such as tap water migrate from the partition on the cathode side through the electrolytic diaphragm 11 (neutral membrane), Thicken in the anode compartment. At the same time, 2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻ causes H ⁺
Is generated. Hydrochloric acid is generated by H ⁺ + Cl ⁻ → HCl to generate 2H ⁺ +
Sulfuric acid is generated by SO ₄ ^2- → H ₂ SO ₄ , and the pH is lowered (acidified).

Electrode plate 15 (cathode side) Na ⁺ ions, Ca ²⁺ ions and the like contained in the raw water migrate from the partition portion on the anode side through the electrolytic diaphragm 11 (neutral membrane), and partition on the cathode side. Thicken in parts. At the same time, 2H ₂ O + 2e ⁻ → 2OH ⁻ + H ₂ causes O
H ^- is generated. Sodium hydroxide is produced by Na ⁺ + OH ⁻ → NaOH, calcium hydroxide is produced by Ca ²⁺ + 2OH ⁻ → Ca (OH) ₂ , and the pH is increased (alkalinized).

Further, in the next polarity reversal operation for 3 minutes in order to prevent the sludge from adhering to the electrode plates 14 and 15, a negative voltage is applied to the electrode plate 14 and a positive voltage is applied to the electrode plate 15. It In this polarity reversal operation, the acidic water pipe 1
6 and the upstream end of the alkaline water pipe 18 are closed, and the waste liquid is discharged to the outside of the system by a separately provided discharge pipe.

In the reformer 2, the reforming tank 21 is made of an electrically insulating material resistant to acids and alkalis, and the acidic water outlet 31 of the partition 12 of the electrolytic cell 1 and the inlet 36 of the reformer 2 are acidified. Water piping 1
It is connected via 6. In addition, the downstream end 29 of the reforming water pipe 27, in which the upstream end 28 is connected to the outlet 37 of the reformer 2,
The alkaline water outlet 32 of the partition 13 is connected to the middle portion of the alkaline water pipe 18 having the upstream end 33 connected thereto.

The reformer 2 includes a reforming tank 21 and magnesium electrode plates 22 and 23 (first and second electrode plates) vertically arranged in the reforming tank 21 so as to face each other. Electrode plate 22,
Electrode plates 24, 25, 26 (intermediate electrode plates) made of magnesium and vertically arranged facing each other between 23 and the electrode plates 22, 2.
And a voltage applying means 4 for reforming for applying a DC voltage between the two.

When a DC voltage is applied between the electrode plate 22 and the electrode plate 23, bipolar electrolysis occurs even in the intermediate electrode which is not connected, and the Mg ²⁺ ions are dissolved from the surface of each electrode plate serving as an anode. Similarly, Mg (OH) ₂ is produced by reacting with OH ⁻ and is mixed with water. ^{Mg 2+ + 2OH - → Mg (} O
H) _{2 In} addition, when the acidic water 17 is reformed into alkaline reforming water when the voltage application is stopped, the formation of a film mainly containing Mg (OH) ₂ stabilizes and the dissolution of Mg ²⁺ ions is stopped. .

As a result, the acidic water 17 discharged from the partition 12 for applying a positive voltage to the electrode plate 14 is reformed into alkaline reforming water and merges with the alkaline water 19 flowing in the alkaline water pipe 18. If the electrode plates 22 and 23 are made of a noble metal, the electrode plates 22 and 23 will not be melted and the electrode plates can be prevented from being consumed.

The electrolyzed water producing apparatus A of this embodiment has the following advantages. The electrolyzed water generator A has a configuration in which the acidic water 17 is reformed into alkaline reformed water in the reformer 2 and merges with the alkaline water 19 flowing in the alkaline water pipe 18. The discharge of the water 17 can be prevented. Further, the structure is relatively simple because only the reformer 2 is provided. Further, the electrolyzed water generator A is
Mixed water 34 of alkaline reforming water 38 + alkaline water 19
Since there is only one outlet that discharges, it is easy to use.

The alkaline mixed water 34 can be used as bath water, drinking water, hydroponics water, agricultural water, coagulation purification of muddy water, and soil improvement water (improvement of acidic soil in volcanic areas). .

Next, a second embodiment of the present invention (claim 1,
(Corresponding to 2 and 4) will be described based on FIG. The electrolyzed water producing apparatus B differs from the electrolyzed water producing apparatus A in the following points.
The reformer 2 includes magnesium electrode plates 22, 23, 2
4, 25, and 26 (dissolved bodies) are vertically arranged in the reforming tank 21 while facing each other.

When the acidic water 17 is introduced into the reformer 2, the magnesium electrode plates 22, 23, 24, 25 and 26 are vigorously spontaneously dissolved, and the Mg ²⁺ ions are dissolved. Reacts with OH ⁻ to form Mg (OH) ₂ and mixes with water. ^{Mg 2+ + 2OH - → Mg (} OH) 2

As a result, the pH of the acidic water 17 discharged from the compartment 12 for applying a positive voltage to the electrode plate 14 rises in the reformer 2 and is reformed into alkaline reformed water 272,
The reforming water 272 joins the alkaline water 19 flowing in the alkaline water pipe 18.

The electrolyzed water producing apparatus B of this embodiment has the following advantages. In the electrolyzed water generator B, the acidic water 17 is reformed into the alkaline reformed water 39 in the reformer 2 and merged with the alkaline water 19 flowing in the alkaline water pipe 18, so that it is easily discarded as waste water. It is possible to prevent the acidic water 17 from being discharged. Moreover, since the reformer 2 is not provided with the voltage applying means 4, the structure is simpler. The alkaline mixed water 35 can be used as bath water, drinking water, hydroponic water, agricultural water, aggregate purification of muddy water, and soil improvement water (improvement of acidic soil in volcanic areas).

Next, a third embodiment of the present invention (claim 1,
3) will be described with reference to FIG. The electrolyzed water generator C differs from the electrolyzed water generator A in the following points.

The downstream end 29 of the reforming water pipe 27 is not connected to the alkaline water pipe 18, and the outlet 37 of the reformer 2 is connected to the upstream end 28. The water 38 is discharged.

The electrolyzed water generator C has a structure in which the acidic water 17 is reformed into alkaline reforming water in the reformer 2 and the alkaline reforming water 38 is discharged from the downstream end 29 of the reforming water pipe 27. Therefore, it is possible to prevent discharge of the acidic water 17, which tends to be discarded water.

The alkaline water 19 can be used as bath water, drinking water, and washing water. Further, the alkaline modified water 38 can be used as bath water, drinking water, hydroponic water, agricultural water, coagulation purification of muddy water, and soil improvement water (improvement of acidic soil in a volcanic area).

Next, a fourth embodiment of the present invention (claim 1,
2) will be described with reference to FIG. The electrolyzed water generator D differs from the electrolyzed water generator B in the following points.

The downstream end 29 of the reforming water pipe 27 is not connected to the alkaline water pipe 18, and the outlet 37 of the reformer 2 is connected to the upstream end 28. Water 39 is discharged.

In the electrolyzed water generator D, the acidic water 17 is reformed into alkaline reformed water 39 in the reformer 2, and the reformed water pipe 2
Since the alkaline reforming water 39 is discharged from the downstream end 29 of the nozzle 7, it is possible to prevent discharge of the acidic water 17 that tends to be discarded water. Further, the structure is relatively simple because only the reformer 2 is provided.

The alkaline water 19 can be used as bath water, drinking water, and washing water. The alkaline modified water 39 can be used as bath water, drinking water, hydroponic water, agricultural water, coagulation purification of muddy water, and soil improvement water (improvement of acidic soil in volcanic areas).

The present invention includes the following embodiments in addition to the above embodiments. a. In the reformer 2 of the electrolyzed water producing devices A and C, as shown in FIG. 5, two comb-shaped magnesium-made structures 51 and 52 are fitted in a non-contact state from the left-right direction or the up-down direction. It is also possible to arrange the other in the reforming tank 21 and apply a DC voltage between the structure 51 and the structure 52 by the voltage applying means 3 or the voltage applying means 4 (corresponding to claim 1). .

B. In the reformer 2 of the electrolyzed water generators B and D, as shown in FIG. 6, two comb-shaped magnesium-made structures 51 and 52 are fitted in a non-contact state from the left-right direction or the vertical direction. Alternatively, one or either of them may be arranged in the reforming tank 21 (corresponding to claims 1 and 2).

C. Electrode plates (first and second electrode plates, intermediate electrode plates) and melts containing magnesium as a main component are obtained by adding an alkaline earth metal (Ca) other than magnesium to magnesium.
Etc.) may be contained in an amount of 0.1% to 20% by weight.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an electrolyzed water generator according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of an electrolyzed water generator according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram of an electrolyzed water generator according to a third embodiment of the present invention.

FIG. 4 is an explanatory diagram of an electrolyzed water generator according to a fourth embodiment of the present invention.

FIG. 5 is an explanatory diagram showing another example of a reformer.

FIG. 6 is an explanatory diagram showing another example of a reformer.

[Explanation of symbols]

A, B, C, D Electrolyzed water generator 1 electrolysis tank 2 reformer 3 Voltage applying means 4 Voltage applying means (voltage applying means for reforming) 10 Raw water 11 Electrolytic diaphragm (neutral membrane) 12, 13 division 14, 15 Electrode plate (electrode) 16 Acidic water piping 17 Acidic water (acidic electrolyzed water) 18 Alkaline water piping 19 Alkaline water (alkaline electrolyzed water) 22 Electrode plate (first electrode plate, melt) 23 Electrode plate (second electrode plate, melt) 24-26 electrode plate (dissolved material, intermediate electrode plate) 27 Water piping 28 Upstream end of reforming water pipe 29 Downstream end of reforming water pipe 31 Acidic water outlet 32 Alkaline water outlet 36 reformer inlet 37 Reformer outlet 100 reforming tank (housing)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 1/68 510 C02F 1/68 510B 510G 510H 520 520B 540 540E (72) Inventor Kazuo Tokushima Aichi 1-chome, Showa-cho, Kariya city, Japan, DENSO CO., LTD. (72) Inventor, Kenichi Suzuki, Aichi Prefecture, Aichi-gun, Nagakute-cho, Aichi Prefecture, Nagata, 1st 41, Yokomichi, Toyota Central Research Institute Co., Ltd. (72) Inventor, Fumio Shimizu, Aichi F-term in Toyota Central Research Laboratory Co., Ltd. 1 at 41 Yokomichi, Nagakute-cho, Nagakute-cho, Aichi prefecture (reference) 2B314 MA21 2D005 FA00 4D061 DA01 DA03 DA07 DB07 DB08 EA02 EB01 EB04 EB12 EB17 EB19 EB20 EB30 EB31

Claims (4)

[Claims] 1. An electrolytic cell in which the inside of the tank is divided into two compartments by an electrolytic diaphragm, and an electrode is arranged in each compartment, and a voltage applying means for applying a DC voltage between the electrodes, each compartment being provided in each compartment. An electrolyzed water generator that introduces raw water and produces acidic electrolyzed water in the compartment where the positive voltage is applied to the electrodes and alkaline electrolyzed water in the compartment where the negative voltage is applied to the electrodes In the electrolyzed water generation apparatus, a reformer for reforming the acidic electrolyzed water discharged from the compartment on the side where a positive voltage is applied to the electrode into neutral or alkaline reformed water is provided. . 2. The electrolyzed water generation apparatus according to claim 1, wherein the reformer is one in which one or more melts containing magnesium as a main component are placed in a reforming tank. 3. The reformer is arranged so as to face a reforming tank, first and second electrode plates arranged to face each other in the reforming tank, and to face between the first and second electrode plates. 2. A single or a plurality of intermediate electrode plates mainly composed of magnesium and a voltage applying means for reforming for applying a DC voltage between the first and second electrode plates. The electrolyzed water generator described. 4. An acidic water outlet of the electrolyzer and an inlet of the reformer are connected via an acidic water pipe, and an alkaline water pipe having an upstream end connected to the alkaline water outlet of the electrolyzer is provided in the middle of the alkaline water pipe. The electrolyzed water generator according to any one of claims 1 to 3, wherein a downstream end of a reforming water pipe having an upstream end connected to an outlet of the reformer is connected.