JPH1157719A - Ionic water producing/feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately know effective chlorine concentration in ionic water just before use to enhance usefulness by connecting a polarography type continuous effective chlorine concentration meter successively to a water feeding pump, thereby continuously measuring effective chlorine concentration in ionic water during water feeding. SOLUTION: An electrolyzer A where electrolysis promoting material such as salt is added to raw water feed through a valve V-1 to produce ionic water is divided into a catholic compartment 2 and an anodic compartment 3 by a diaphragm 1. By supplying a direct current to electrodes 4, 5 arranged in the compartments 2, 3 respectively, electrodialysis is performed. The ionic water produced in the anodic compartment 3 it led to a water storage tank C by takeoff piping 6 and is stored therein. Downstream of the water storage tank C, a water feeding pump P-2 and water feeding faucets 9, 10 are arranged through water supply pipes 7, 8. And by an effective chlorine concentration meter D installed in mid-way of the water feeding pipe (piping) 7, effective chlorine concentration in the ionic water during water feeding is continuously measured, and the measured values are indicated on a monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing and supplying ionic water (electrolyzed water). More particularly, the present invention relates to a device for generating and supplying ionized water that can be used in medical institutions, food handling institutions, general households, and the like when disinfecting human bodies, disinfecting affected parts, and disinfecting and sterilizing equipment used in each institution.

[0002]

2. Description of the Related Art In recent years, medical institutions such as hospitals and clinics, food service centers such as catering centers, canteens, and general households, etc., disinfect and sterilize equipment and the like equipped in these institutions and homes. Ionized water (electrolyzed water) obtained by electrolysis of an aqueous solution containing a small amount of chloride ions when disinfecting the affected area by disinfecting the fingers of workers at home, treating burns at medical institutions, treating teeth, etc. Came to be used.

When water containing a small amount of chlorine ions is electrolyzed, chlorine gas generated on the anode side dissolves in the water, and the chlorine gas, which is effective for hypochlorite such as hypochlorous acid or sodium hypochlorite, is used. It is known that chlorine is generated and these available chlorines exhibit high sterilizing ability. However, ionized water containing available chlorine is chemically unstable, the concentration of available chlorine decreases in a relatively short time, and the available chlorine concentration required as ionized water for disinfection and sterilization is 10 to 10%.
There is a disadvantage that it is difficult to maintain the level of 0 ppm.

According to the conventional method, ionic water generated by electrolysis of water is temporarily stored in a water storage tank, and is taken out of the water storage tank directly as needed and used.
A pressurizing means such as a pump is installed in the water storage tank, and the supply water is pressurized and sent through a water supply pipe for use. Ion water was sampled each time it was used, and the effective chlorine concentration was measured by the potassium iodide starch paper method or the iodine titration method in accordance with JIS K0102. The measurement value could not be known immediately before.

In the conventional ion water generating / supplying apparatus, if the water supply pipe and the water supply curan are made of metal, they are corroded or the performance of the ion water deteriorates. The joints easily come off in a time, and there is a problem in use.

[0006]

SUMMARY OF THE INVENTION In view of the above situation, the present inventor has provided an apparatus for producing and supplying ionic water in which the effective chlorine concentration of ionic water generated by electrolysis can be known immediately before use. As a result of intensive studies for the purpose of doing so, the present invention has been completed. That is, the present invention aims at the following. 1. To provide a device for producing and supplying ionic water in which the effective chlorine concentration is maintained within a certain range. 2. To provide an ion water generation / supply device capable of continuously measuring the effective chlorine concentration when using ion water and immediately knowing the measured value. 3. Provided is a device for generating and supplying electrolyzed water in which a water supply curran is hardly corroded and the performance of obtained ion water is hardly deteriorated.

[0007] In order to solve the above problems, the present invention provides:
The water supplied with a small amount of chlorine ions is electrolyzed in an electrolytic cell to generate ionized water, and the effective chlorine concentration is 10 ppm to 100 p.
pm ionized water is introduced into a water storage tank, and a water supply pump and a water supply curran are arranged downstream of the water storage tank through a water supply pipe. An effective chlorine concentration meter is connected to enable continuous measurement of the effective chlorine concentration in the ionic water in the feed water.
Provide a supply device.

Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following description unless it departs from the gist. FIG. 1 is a diagram of a system for generating and supplying ionic water of an example of a device for generating and supplying ionic water according to the present invention, and FIG. 2 is a diagram of an example of a water supply curran in which a portion in contact with ionic water is coated with a polyester resin. It is a vertical side view.

The electrolytic cell A comprises valves V-1, V-2, V-
An electrolytic promoting substance such as salt is added to water (original water) such as tap water or pure water supplied through 3 to generate (produce) ionized water. The electrolytic cell A is divided into two electrolytic chambers, a cathode chamber 2 and an anode chamber 3, by a diaphragm 1. Electrodes 4 and 5 are arranged in each of the electrolytic chambers 2 and 3, and a direct current is applied to the electrodes. In the present invention, there are no particular restrictions on the materials used such as the electrolytic cell A, the electrodes 4, 5, the diaphragm 1, and the like.
Conventionally used for the production of this type of electrolytic cell can be used without limitation.

In order to add an electrolysis promoting substance to water,
Connect salt water tank B via pump P-1 to supply water (source water)
So that it can be added to The electrolysis-promoting substance added to the water supply is selected from substances that generate chloride ions when dissolved in water, and specific examples include sodium chloride, potassium chloride, and hydrochloric acid. These substances may be added as an aqueous solution to the water supply.

The ionic water generated (manufactured) in the anode chamber 3 of the electrolytic cell A is led to a water storage tank C by a take-out pipe 6.
Water is stored until it is actually used. There is no particular limitation on the material of the water storage tank C, and those which have been conventionally used for manufacturing this kind of ion water water storage tank can be used without limitation.
The ionized water generated (produced) in the electrolytic cell A has an effective chlorine concentration of 10 ppm to 100 ppm. If the effective chlorine concentration is less than 10 ppm,
If the sterilizing ability is low, and if it exceeds 100 ppm, it is not enough to exhibit the disinfecting / sterilizing ability, and it corrodes the water supply pipe (pipe) and the water supply curan, so neither is preferable.

The effective chlorine concentration can be adjusted by changing the type and concentration of the electrolysis promoting substance, the voltage applied to the electrodes, and the like. The ionized water generated (produced) in the cathode chamber 2 is taken out of the cathode chamber 2 via the valve V-7 and stored in the same manner for other uses,
It is neutralized.

Downstream of the water storage tank C, a water supply pipe (piping) 7,
The water supply pump P-2 and the water supply currans 9 and 10 are arranged via 8. The water supply pump P-2 operates when ion water is used, pressurizes the water to a constant water pressure, and supplies the water supply curran 9, 1
Functions to supply 0. Since the ionic water generated by the apparatus according to the present invention is highly corrosive, it is preferable that the place where the ionic water of the feed water pump comes in contact with the ionic water is made of a corrosion-resistant material.

The water supply pipe (pipe) used is such that the base is made of a metal material, and at least a part of the portion that comes into contact with the electrolytic water (ionized water) is coated with a saturated polyester resin or polyvinyl chloride. Is preferred. It is preferable that the water supply curran also has a base made of a metal material, and at least a part of the base contacting with ionic water is coated with a saturated polyester resin or polyvinyl chloride. Here, at least a part means that at least one of the components constituted by a plurality of components such as a water supply pipe and a water supply curran is covered with a resin.

In the middle of the water supply pipe (pipe) 7, an effective chlorine concentration meter D is connected by a water supply pipe (pipe) 11 from the water supply pump P- 2, and ion water after measurement is supplied by the water supply pipe (pipe) 12. Return to water tank C. The effective chlorine concentration meter D is wired with an electric circuit so as to operate in conjunction with the feedwater pump P-2.

The effective chlorine concentration in the ionic water in the feed water can be continuously measured. Available chlorine is chlorine that has bactericidal activity, and as a method of quantification, as described above,
Although a potassium starch iodide paper method and an iodine titration method based on JIS K0120 are known, these methods are not suitable for a method of continuously measuring. As a measuring device for continuously measuring the available chlorine concentration, a polarographic continuous available chlorine concentration meter, which has been conventionally used as a measuring device for the available chlorine concentration in pool water, is suitable. This type of densitometer can display accurate measurements on a monitor.

An electrolytic circuit may be provided to keep the available chlorine concentration in the water supply or in the ionic water waiting for water supply within the above range. For example, the effective chlorine concentration meter D indicates that the effective chlorine concentration in the ionic water is 10 pp.
m, the output of the pump P-1 of the salt water tank B is increased by a signal to increase the chlorine ion sent to the cathode chamber 3,
When it is sensed that the concentration exceeds ppm, the valve V-2 may be closed, V-3 and V-6 may be opened, and the ion water in the cathode chamber may be sent to the anode chamber 3.

FIG. 2 is a longitudinal sectional side view of an example of the water supply curan. Reference numeral 21 denotes a swing part, reference numeral 22 denotes a body part, and reference numeral 23 denotes a water supply / water stop piece. In this example, the inner part (the shaded part in FIG. 2) that comes into contact with the electrolyzed water was covered with a saturated polyester resin. To cover the inner part with resin,
The water supply curran is once disassembled, and the head swing part 21 and the body part 22 are covered with resin on the inner part, and the water supply / water stop piece part 23 is covered with resin, and after the covering, each product is joined by heating. According to the method. Alternatively, the water supply curan may be fully opened and the molten resin may be poured and applied. Further, only the swing part 21 may be covered with a resin, and this may be attached to a plastic valve.

[0019]

【Example】

[Example 1] <Confirmation test of difference by measuring method of available chlorine concentration> Tap water to which an aqueous solution of sodium chloride was added was supplied to electrolytic cell A, and electrolysis was performed according to a conventional method. Then, this ion water is stored in the water storage tank C, and the pump P-2
Was operated to pass through the effective chlorine concentration meter D and returned to the water storage tank C. During this time, the effective chlorine concentration was displayed on a monitor and recorded, and the ionized water stored in the water storage tank was collected from the water supply curan 10 times (10 days) every day, and the JIS was collected.
Analysis was performed by an iodine titration method based on K0120. Table 1 shows a comparison between the effective chlorine concentration (ppm) displayed on the monitor and the value (ppm) analyzed by the iodine titration method.

[0020]

[Table 1]

From Table 1, the following is clear. (1) The effective chlorine concentration in the ionized water can be displayed on a monitor by passing the ionized water through a polarographic continuous effective chlorine concentration meter. (2) Regarding the available chlorine concentration in the ionic water, there is no significant difference between the value displayed on the polarographic continuous chlorine analyzer and the value analyzed by iodometric titration. (3) The effective chlorine concentration in the charged ions stored in the water tank C decreases as the number of days of water storage increases.

[Example 2] <Performance test of resin-coated curan> Water supply curran shown in FIG. 2 was attached to water curn 9 of the apparatus shown as a system diagram in FIG. 1, and an aqueous solution of sodium chloride was added. Water was supplied to the electrolyzer A and electrolyzed according to a standard method to obtain electrolyzed water having an effective chlorine concentration of 40 ppm. This ionic water was stored in the water tank C and used for a long period of 12 months. Not at all. Further, the water supply curan is opened to bring the ionized water from the water storage tank C into a flowing state, and the ionized water is collected every predetermined time, and the effective chlorine concentration (p
pm) and available chlorine concentration (pp
and m) were analyzed and compared by an iodine titration method based on JIS K0120. The analysis results are shown in Table-2.

[0023]

[Table 2]

From Table 2, the following is clear. (1) The effective chlorine concentration of ionic water does not decrease at all even after passing through the water supply curran. (2) When providing the produced (manufactured) ionized water for the purpose,
It can be used without deteriorating high sterilization ability.

[0025]

As described above, the present invention has the following extremely advantageous effects, and its industrial utility value is extremely large. 1. The apparatus for producing and supplying ionic water according to the present invention can continuously measure the effective chlorine concentration when ionic water is used, and can immediately know the measured value. 2. When the apparatus for generating and supplying ionic water according to the present invention is used, it is possible to generate and supply ionic water in which the effective chlorine concentration is maintained within a certain range. 3. The apparatus for producing and supplying ionic water according to the present invention is such that when at least a portion of a water supply pipe (pipe) or a water supply curan that comes into contact with ionic water is coated with a saturated polyester resin or polyvinyl chloride, these may corrode, The performance of the obtained ionic water is hard to decrease.

[Brief description of the drawings]

FIG. 1 is a diagram of a system for generating and supplying ionic water as an example of a device for generating and supplying ionic water according to the present invention.

FIG. 2 is a longitudinal sectional side view of an example of a water supply curan in which a portion that comes into contact with ion water is coated with a polyester resin.

[Explanation of symbols]

A: electrolytic cell B: salt water tank C: water tank P-1, P-2: pump V-1, V-2, V-3, V-4, V-5, V-6, V
-7: Valve 1: Diaphragm 2: Cathode compartment 3: Anode compartment 4, 5: Electrode 6, 7, 8, 11, 12: Water supply pipe (piping) 9, 10: Water supply curran 21: Swing part 22: Body part 23: Top for water supply / stopping water

Claims (3)

[Claims] 1. A water supply to which a small amount of chlorine ions is added is electrolyzed in an electrolytic cell to generate ionized water, and the effective chlorine concentration is 10 p.
pm to 100 ppm of ionized water into a water storage tank, and a water supply pump and a water supply curan are arranged downstream of the water storage tank via a water supply pipe. An apparatus for producing and supplying ionic water, wherein a continuous effective chlorine concentration meter is connected to continuously measure the effective chlorine concentration in ionic water in feed water. 2. When the available chlorine concentration meter in the ionic water in the supply water detects less than 10 ppm, a pump for increasing the chloride ion added to the water supply by a signal based on the detected available chlorine concentration is operated. An apparatus for generating and supplying ionic water according to claim 1. 3. The ionic water according to claim 1, wherein at least a part of the water supply pipe and the water supply curan that comes into contact with the ionic water is coated with a saturated polyester resin or polyvinyl chloride. Production and supply equipment.