JPH0671267A - Water quality regulating method - Google Patents

Abstract

PURPOSE:To convert water to a bicarbonate alkaline water suitable for drinking and to obtain a bicarbonate-contg. drinking water rich in minerals at the time of allowing an anion to migrate to a cathode compartment to generate alkaline water by supplying a carbonic acid-contg. water and/or a carbon dioxide-contg. gas to the alkaline water. CONSTITUTION:The electrolytic cell A is divided by a diaphragm B into two compartments, an anode 6 is inserted in one compartment to form an anode compartment C, and a cathode 7 is inserted in the other compartment to form a cathode compartment D. A dil. salt-contg. water is supplied to the electrolytic cell A, an AC current is applied to bring about electrolysis, hence the anion migrates to the anode compartment C to generate acidic water, and the cation migrates to the cathode compartment D to generate alkaline water. The alkaline water in the cathode compartment D is introduced into a reaction tank E by opening a valve 11, and carbon dioxide is diffused from a diffusion plate 12 through a carbon dioxide inlet pipe 13. The hydroxyl ion OH-in the alkaline water is neutralized, the bicarbonate is dissociated in the liq. in the system, and the water is controlled approximately to pH 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system in which salt-containing water is subjected to diaphragm electrolysis to produce acidic water rich in anions in the anode chamber and alkaline water rich in cations in the cathode water. And a method for adjusting mineral water suitable for drinking by neutralizing alkaline water with carbonic acid.

[0002]

2. Description of the Related Art In recent years, water purifiers have become widespread because it is possible to secure highly purified drinking water from the tendency to notice health as the quality of clean water deteriorates due to pollution of water sources. In addition, the number of people who drink natural water with extremely low or no pollution as mineral water has increased, and this kind of water has been imported and sold from overseas. Also,
An electrolyzed water production apparatus called alkaline ionized water as water containing alkaline minerals has been put on the market and popular.

The present invention relates to a method for producing alkaline ionized water, that is, a method for producing electrolytically produced water. In the conventional method for producing alkaline ionized water, water containing salt is simply placed in a tank separated into two chambers with a diaphragm, the cathode is immersed in one chamber and the anode is immersed in the other chamber, and an alternating current is applied to the cathode chamber. Cations are moved to the anode chamber, and as a result, the cathode chamber liquid becomes alkaline water containing cations and hydroxide ions, and the anode chamber liquid becomes acidic water containing anions and hydrogen ions. Make water available for drinking. In order to artificially increase the calcium ion concentration of the cathode chamber liquid, calcium lactate is also added in advance to salt-containing water subjected to electrolysis.

In the conventional method, the alkaline water to be drunk is alkaline ionized water containing hydroxide ions, and more devising is needed to make it suitable for everyone.

[0005]

DISCLOSURE OF THE INVENTION In the present invention, carbonic acid, carbonic acid gas or the like is added to the alkaline hydroxide of the cathode chamber liquid to neutralize and remove the hydroxide ion, and the carbonic acid or bicarbonate type positive electrode is then removed. It is made easier to drink by converting it to mineral water containing ions.

[0006]

SUMMARY OF THE INVENTION The present invention is divided into two chambers with a septum, and an anode is inserted into one chamber to form an anode chamber, and a cathode is inserted into the other chamber to form an electrolytic cell as a cathode chamber. , Dilute salt-containing water is put into the electrolytic cell, and an alternating current is passed to perform electrolysis to move anions to the anode chamber to generate acidic water, and cations to the cathode chamber to move alkaline water. When producing, is characterized in that carbonic acid-containing water and / or carbon dioxide gas-containing gas body is fed to the alkaline water, further, the carbon dioxide gas-containing gas body is generated from acidic water, Further, the carbon dioxide gas is obtained by previously adding an alkali metal bicarbonate and / or an alkaline earth metal bicarbonate to the dilute salt-containing water subjected to electrolysis, or an alkali metal carbonate. Salt, bicarbonate, Cali earth metal carbonate and is characterized also in that the at least one salt selected from bicarbonate is obtained by mixing the acidic water obtained from the anode chamber.

[0007]

The present invention divides the chamber into two chambers by a diaphragm, inserts an anode in one chamber and a cathode in the other chamber, and subject it to electrolysis to generate alkali metal or alkaline earth metal on the cathode side. By neutralizing the alkalinity mainly composed of hydroxides with carbonic acid and / or carbon dioxide to form bicarbonates of alkali metals and alkaline earth metals, water containing calcium ions and magnesium ions more suitable for drinking can be obtained. It becomes possible to adjust.

[0008]

EXAMPLE FIG. 1 shows a case where the method of the present invention is carried out by a batch method. A solution containing salt, such as tap water, is opened through valves 2 and 4 and introduced through inlet tubes 1, 3 and 5 to a diaphragm. When the predetermined level is reached, valves 2 and 4 are closed and water supply is stopped.

[0009] It depends on the salt concentration in the solution to be treated. It is about 9.0.

[0010] It is used for conventional purposes such as face washing, lotion, mouthwash, and face washing after shaving. other After the gas is introduced into the chamber, the valve 11 is closed when the level reaches a predetermined level, and then carbon dioxide gas from a suitable carbon dioxide gas source through the carbon dioxide gas introduction pipe 13 for opening the valve 14 is supplied to the diffuser plate 12 or the like. Neutralized, the liquid in the system dissociates and exists as bicarbonates of calcium, magnesium, potassium, sodium, etc. PH is controlled to be almost neutral and contains bicarbonate that is extremely easy to drink. Converted to mineral-containing water.

Next, the valve 14 is closed to stop the introduction of carbon dioxide gas, and then attached to the discharge pipe 15. Use for necessary purposes. The amount of alkaline water bicarbonate obtained was about 1 liter.

In the above, the embodiment of the treatment by the batch system is shown, but the introduction of the raw water is made continuous and the valve 2 is used. It can also be electrolyzed by continuously energizing. For example, at a flow rate of 1 l / min in the anode chamber It

FIG. 2 shows a case where the method of the present invention is carried out in a continuous manner, and is essentially the same as that shown in FIG. At the same time, it is continuously supplied at a flow rate of 3 l / min, and at the same time, a current of 100 V (alternating current) of 20 A is applied to the anode 6 and the cathode 7 via conductors for electrolysis. Electrical They are introduced into the anolyte compartment 19 and the catholyte compartment 20, respectively. The anolyte compartment has a pH of about 3.2 to 3.5 and is discharged to the outside of the system through the discharge pipe 8. The cathode chamber liquid is PH8.7. Is filled with a Raschig ring with a diameter of about 1 inch,
An upward flow is carried out under a water flow condition of about 10 m / hr as an LV and about 91 / hr as an SV, and at the same time, carbon dioxide gas is introduced through a carbon dioxide gas introduction pipe 13 and mixed and reacted in a packed bed. The treated water thus obtained is discharged as an alkaline bicarbonate water through the overflow channel 23 to the outside of the system, and is used for drinking and other purposes.

[0014] It That is, originally, the carbonate and bicarbonate contained in the water to be treated are accumulated as bicarbonate ions in the anode chamber by electrolysis, and this is decomposed due to the acidity to generate carbon dioxide gas. Further, in the present invention, carbonate or bicarbonate may be added to the water to be treated and subjected to electrolysis, in which case carbon dioxide generated in the anode chamber is used for neutralization of the catholyte. You can also

The carbon dioxide gas usable in the present invention is not limited in its source, and any gas can be used as long as it contains carbon dioxide gas. For example, carbonic acid may be used by mixing carbonate with an anode chamber liquid or directly adding to the anode chamber to generate carbon dioxide, or by reacting with water to form carbonated water. When the soluble metal salt produced as a by-product in the anode chamber is subjected to electrolysis, cations move to the cathode side, and the cation concentration in the cathode chamber liquid can be increased. Further, it is also effective to add salts thereof from outside the system to the water to be treated, as has been conventionally carried out for the purpose of increasing cations such as calcium and magnesium ions in the cathode chamber liquid.

[0016]

As described above, according to the method of the present invention, it is possible to convert conventional water containing alkaline hydroxide alkaline ions into alkaline water bicarbonate, which is extremely suitable for drinking and is not excessive in gastric acid. By converting alkaline water, which is effective only for humans, into alkaline bicarbonate water, it can be widely and comfortably used by general healthy people, and moreover, by moving cations to the cathode chamber by electrolysis. Since ions effective for health such as calcium and magnesium are concentrated, drinking water rich in minerals and bicarbonate type can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an example of a batch-type processing method according to the present invention.

FIG. 2 is a diagram for explaining an example of a continuous processing method according to the present invention.

[Explanation of symbols]

1 conduit 2 valve 3 introduction pipe 4 valve 5 introduction pipe 6 anode 7 cathode 8 discharge pipe 9 valve 10 discharge pipe 11 valve 12 diffuser plate 13 carbon dioxide gas introduction pipe 14 valve 15 discharge pipe 16 valve 17 partition wall 18 partition wall 19 anolyte compartment 20 Catholyte Chamber 21 Water Transfer Channel 22 Packed Bed 23 Overflow Channel

Claims (4)

[Claims] 1. A chamber is divided into two chambers, a positive electrode is inserted into one chamber to form an anode chamber, and a cathode is inserted into the other chamber to form an electrolytic cell as a cathode chamber, which is filled with diluted salt-containing water. Then, an alternating current is applied to carry out electrolysis, anions are moved to the anode chamber to generate acidic water, and cations are moved to the cathode chamber to generate alkaline water. Containing water and / or carbon dioxide gas-containing gas body 2. The water quality adjusting method according to claim 1, wherein a gas body generated in the anode chamber is reacted with a liquid in the cathode chamber. 3. The method according to claim 1 or 2, wherein an alkali metal bicarbonate and / or an alkaline earth metal bicarbonate is added to the dilute salt-containing water. Water quality adjustment method 4. The carbon dioxide gas-containing gas body is a gas body generated by bringing an alkali metal carbonate and / or an alkaline earth metal carbonate into contact with an acid and / or an anode chamber liquid. A method for adjusting water quality according to claim 1.