JP2004209341A - Method and apparatus for storing electrolytically generated water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a problem caused by the discharge or exhaust of gas by suppressing the generation of chlorine gas, hydrogen gas or the like from the electrolytically generated water stored in a storage tank to abolish or largely suppress the discharge of those gases to a work space or the exhaust of them to the open air. <P>SOLUTION: In this storage method for storing electrolytically generated water made by electrolyzing water to be electrolyzed and the storage apparatus therefor, the electrolytically generated water stored in the storage tank 21 is stored in such a state that the contact of the electrolytically generated water with the surface of the water or the gas above the surface of the water is cut off by a contact cutting-off layer 22 to largely suppress the generation of chlorine gas, hydrogen gas or the like from the stored electrolytically generated water. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【図面の簡単な説明】
【図１】本発明に係る貯留装置を備えた電解水生成装置の全体を模式的に示す概略構成図である。
【図２】同貯留装置の縦断面図である。
【図３】同貯留装置の横断面である。
【図４】電解生成酸性水中の有効塩素の経時的変化の測定結果を示すグラフである。
【図５】同測定結果から算出した電解生成酸性水の空気接触面積と１分間の塩素揮発量の関係を示すグラフである。
【符号の説明】
１０…有隔膜電解槽、２０ａ，２０ｂ…貯留装置、Ｒ１，Ｒ２…電解室、１１…槽本体、１２…隔膜、１３ａ，１３ｂ…電極板、１４…供給管路、１５ａ，１５ｂ…流出管路、２１…貯留槽、２２…接触遮断部材、２２ａ，２２ｂ…浮き玉。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and a device for storing electrolyzed water.
[0002]
[Prior art]
Electrolyzed water, which is electrolyzed using a dilute aqueous solution of an inorganic salt such as salt or tap water as electrolyzed water, is used in many fields as functional water. For example, in electrolysis using a diaphragm electrolytic cell, acidic water (electrolytically generated acidic water) is generated in the anode chamber-side electrolytic chamber, and alkaline water (electrolytically generated alkaline water) is generated in the cathode chamber-side electrolytic chamber. . Electrolytically generated acidic water has a high sterilizing ability and is used as a germicide or sterile water. Further, the electrolytically generated alkaline water has a high cleaning ability and is used as a cleaning agent.
[0003]
In the utilization mode of the electrolyzed water, there is a case where a large amount is used temporarily. In order to cope with the usage mode, there is a method in which the electrolyzed water to be used is stored in a storage tank in advance. Taken. In such a storage method, gas of various components dissolved from the electrolyzed water contained in the storage tank is generated with time, so that this gas treatment countermeasure is problematic.
[0004]
Various components (Cl ₂ or H ₂ ) and the like generated during electrolysis of the water to be electrolyzed are dissolved in the electrolyzed water, and these components become gaseous (chlorine gas, hydrogen gas, etc.) and become aging. Occurs. If chlorine gas, hydrogen gas, and the like are continuously released into the work space in which the electrolyzed water generation device is installed, this poses problems in terms of sanitation of the work space and rust prevention of the device.
[0005]
Conventionally, in this type of storage method of electrolytically generated water, generally, an exhaust pipe facing the outside is connected to a storage tank containing the electrolytically generated water, and gas generated in the storage tank is passed through the exhaust pipe. Exhaust means for exhausting outdoors are adopted. In addition, in some parts, an adsorber for accommodating an adsorbent is installed at a position in front of or behind the exhaust pipe to adsorb chemical substances in gas generated in the storage tank and exhaust air to the outside. Exhaust means to exhaust to the air are also adopted.
[0006]
These exhaust means basically eliminate the problems of hygiene in the work space and rust prevention of the device by restricting the release of gas generated in the storage tank to the work space. The former exhaust means prevents local pollution of the atmosphere by diluting the chemical substances in the gas into the atmosphere, and the latter exhaust means removes the chemical substances in the gas before discharging the gas to the outside air. It is intended to prevent air pollution by adsorption and removal. Each of these exhaust means discharges the gas generated in the storage tank to the outside, and if the exhaust means fails, avoid releasing the gas generated in the storage tank to the working space. I can't.
[0007]
In place of such an exhaust means, a means for controlling the release of gas generated in the storage tank to the working space without discharging the gas to the outside (referred to as a gas release control means) has been developed and proposed (for example, gas release control means). See Patent Document 1).
[0008]
The gas release regulating means comprises a gas-liquid separation tank comprising a storage tank for storing the electrolytically generated acidic water as the electrolytically generated water and a storage tank for storing the electrolytically generated alkaline water. They are connected to an electrolyzed water tank, which is a tank for preparation of electrolyzed water, through passages.
[0009]
In the gas release regulating means, the gas generated in each gas-liquid separation tank is collected in the electrolyzed water tank through each connection pipe, so that the gas is released into the working space and discharged outside. To regulate. In other words, the gas release control means absorbs gas generated in the storage tank into the water to be electrolyzed in a closed system.
[0010]
[Patent Document 1]
JP-A-9-308885
[Problems to be solved by the invention]
However, in the gas release regulating means disclosed in Patent Document 1, the size of the apparatus is larger than that of the above-mentioned conventional two exhaust means, and the electrolyzed water generating apparatus equipped with the gas release regulating means is used. There is a problem that a large installation space must be secured in order to install the gas, and when the gas emission control means breaks down, as in the case of the two exhaust means described above, the gas generated in the storage tank is Release to the working space is inevitable.
[0012]
Therefore, the object of the present invention is to make it possible to greatly suppress the generation of gas over time from the electrolytically generated water contained in the storage tank, unlike the above-described exhaust means and gas release regulating means, An object of the present invention is to significantly suppress the emission of gas into a work space and the emission to the outside.
[0013]
[Means for Solving the Problems]
The present invention relates to a method and a device for storing electrolyzed water. The method for storing electrolyzed water according to the present invention is a storage method for storing electrolyzed water generated by electrolyzing water to be electrolyzed, wherein the electrolyzed water contained in a storage tank is subjected to the electrolysis. It is characterized in that the generated water is stored in a state where the water surface is not in contact with the gas on the water surface.
[0014]
In the method for storing electrolyzed water according to the present invention, by forming a contact blocking layer on the surface of the electrolyzed water contained in the storage tank, the surface of the electrolyzed water and the gas on the same water surface Contact can be cut off. The contact fault can be formed by a contact blocking member floating on the surface of the electrolytically generated water. As the contact-blocking member forming the contact-blocking layer, a plurality of types of a large number of floating balls having different sizes can be employed, and as the floating ball, a plurality of types of a large number of ice blocks having different sizes are employed. can do.
[0015]
In the method for storing electrolyzed water according to the present invention, the contact blocking layer is formed by melting a plurality of ice blocks of a plurality of types having different sizes floating on the surface of the electrolyzed water and melting the ice blocks. It can be formed in the formed aqueous layer.
[0016]
The storage device for electrolyzed water according to the present invention is a storage device for storing electrolyzed water generated by electrolyzing water to be electrolyzed, and is connected to an electrolyzer for electrolyzing the electrolyzed water. And a contact blocking member that floats on the surface of the electrolyzed water stored in the storage tank.
[0017]
In the storage device for electrolyzed water according to the present invention, when the storage tank includes a control unit for controlling a storage amount of the electrolyzed water, a plurality of types of a plurality of different sizes may be used as the contact blocking member. Floating ball can be adopted. As the floating ball, a plurality of types of ice blocks having different sizes can be adopted.
[0018]
[Action and Effect of the Invention]
In the method and apparatus for storing electrolyzed water according to the present invention, the electrolyzed water contained in the storage tank is cut off from contact with gas such as air remaining in the storage tank. The generation of the component dissolved in the gas as a gas is regulated or largely suppressed.
[0019]
Therefore, according to the method and apparatus for storing electrolyzed water according to the present invention, the gas in the storage tank containing the electrolyzed water is discharged to the working space and discharged to the outside air at all or almost unnecessary. Become.
[0020]
In addition, according to the method and apparatus for storing electrolyzed water according to the present invention, since the gas in the storage tank containing the electrolyzed water is not exhausted or recirculated, the above-described conventional two-way exhaust means and the above-described method are used. The problem of the gas emission control means does not occur at all.
[0021]
In the method and apparatus for storing electrolyzed water according to the present invention, if a plurality of floating balls of different sizes are used to form the contact blocking layer, a storage tank having a tank shape that is not a simple shape, In addition, it is possible to sufficiently cope with a storage tank having components such as control components for controlling the amount of electrolyzed water stored in the tank.
[0022]
Further, if a large number of ice blocks of different sizes are employed for forming the contact blocking layer, a layer of water formed by melting the ice blocks also functions as a contact blocking layer, and the water layer is formed by electrolysis. It is possible to enhance the contact blocking effect by absorbing the gas to be generated from the generated water, and to sufficiently cope with applications in which the electrolytically generated water is used in a cooled state.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention relates to a method and a storage device for storing electrolyzed water, FIG. 1 schematically shows an electrolyzed water generation device provided with a storage device according to the present invention, and FIG. 2 and FIG. Schematically shows a longitudinal section and a transverse section of the storage device. FIGS. 4 and 5 are graphs showing the results of experiments performed to establish a storage method and a storage device according to the present invention.
[0024]
The electrolyzed water generator has a diaphragm electrolyzer 10, and includes, as storage devices, an acidic water storage device 20a that stores electrolyzed acidic water, and an alkaline water storage device 20b that stores electrolyzed alkaline water. I have. These two storage devices 20a, 20b have the same configuration, and in the following description of the two storage devices 20a, 20b, the same storage device 20 will be described except when the two storage devices 20a, 20b are properly used.
[0025]
The diaphragm electrolyzer 10 constituting the electrolyzed water generating apparatus uses a dilute aqueous solution of sodium chloride as the electrolyzed water, and is disposed in a diaphragm 12 that partitions the inside of the tank body 11 and in each of the compartments partitioned by the diaphragm 12. Electrode plates 13a and 13b are provided to form electrolytic chambers R1 and R2. A branch pipe of a supply pipe 14 for supplying water to be electrolyzed is connected to the electrolysis chambers R1 and R2, and an outflow pipe for flowing out electrolysis water generated in the electrolysis chambers R1 and R2. The roads 15a and 15b are connected.
[0026]
Of the two electrolysis waters, for example, the electrolysis chamber R1 is formed in the anode-side electrolysis chamber, and the electrolysis acid water generated in the electrolysis chamber R1 flows out of the outflow pipe 15a. The electrolysis chamber R2 is formed in the anode-side electrolysis chamber, and the electrolytically generated alkaline water generated in the electrolysis chamber R2 flows out of the outflow pipe 15b. The outflow pipe 15a is connected to a storage tank 21 constituting the storage device 20a. Further, the outflow pipe 15b is connected to a storage tank 21 constituting the storage device 20b.
[0027]
Therefore, one storage device 20a is a dedicated storage device for storing electrolytically generated acidic water, and the other storage device 20b is a dedicated storage device for storing electrolytically generated alkaline water. The electrolytically generated acidic water stored in the storage tank 21 of the storage device 20a is extracted from the storage tank 21 and used when necessary. Similarly, the electrolytically generated alkaline water stored in the storage tank 21 of the storage device 20b is extracted from the storage tank 21 and used when necessary.
[0028]
The method for storing electrolyzed water according to the present invention is performed for storing each electrolyzed water generated in the diaphragm electrolyzer 10 of the electrolyzed water generator, and the electrolyzed water according to the present invention. The storage device for the generated water is implemented in the storage device 20 (20a, 20b).
[0029]
The inventor of the present invention assumed that the electrolytically produced water is stored in a storage tank, and assumed that the air contact area of the surface of the electrolytically produced acidic water contained in the cylindrical glass beaker having various opening dimensions and the chlorine gas were not sufficient. We are trying to confirm the relationship with the amount of volatilization. In this experiment, pH 2.62, an effective chlorine concentration of 38 mg / L, an oxidation-reduction potential of 1155 mV, and a water temperature of 20 ° C. were used as the electrogenerated water, and the diameter was 5 cm, 8.6 cm, 10.4 cm, 13 cm, Five kinds of beakers of 15 cm each accommodated 500 mL of the electrolytically produced acidic water, and allowed to stand in a room (under a fluorescent lamp) at a room temperature of 20 ° C., and measured a temporal change of available chlorine in the electrolytically produced acidic water.
[0030]
The measurement results are shown in the graph of FIG. Also, from the experimental results, the relationship between the air contact area of the electrolytically generated acidic water and the amount of chlorine volatilized for 1 minute was calculated on the assumption that all of the available chlorine lost in the electrolytically generated acidic water was volatilized as chlorine gas. The results are shown in the graph of FIG.
[0031]
From these results, the contained electrolytically produced acidic water is to generate the chlorine component in the electrolytically produced acidic water as chlorine gas with time, and the amount of generated chlorine gas is large in the air contact area of the electrolytically produced acidic water. It can be confirmed that reducing the air contact area can reduce the amount of chlorine gas generated, and reducing the air contact area of the electrolytically produced acidic water to zero reduces the amount of chlorine gas generated to substantially zero. It can be estimated that it can be suppressed.
[0032]
Based on these findings, in the embodiment of the method for storing electrolyzed water according to the present invention, in the storage tank 21 of the storage device 20a, the level of the stored electrolyzed acidic water and the air on the same water surface Electrolytically generated acidic water is stored in a state where contact with the gas is cut off. Further, in the storage tank 21 of the storage device 20b, the electrolytically generated alkaline water is stored in a state where the surface of the contained electrolytically generated alkaline water and the gas such as air on the same surface are cut off. I have.
[0033]
According to the storage method, the generation of chlorine gas from the electrolytically generated acidic water can be greatly suppressed in the storage tank 21 of the storage device 20a, and the electrolytically generated alkaline water can be suppressed in the storage tank 21 of the storage device 20b. Generation of hydrogen gas from water can be greatly suppressed. Accordingly, it is not necessary to discharge a gas mainly composed of a chemical substance generated in each of the storage devices 20a and 20b to the outside, or it is possible to greatly suppress the discharge to the outside.
[0034]
The storage device according to the present invention is used to carry out the storage method. In the embodiment of the storage device for electrolytically generated water according to the present invention, as shown in FIGS. (20a, 20b) is constituted by a storage tank 21 for storing the electrolyzed water and a contact blocking member 22 floating on the surface of the stored electrolyzed water. In the storage device according to the present invention, as the contact blocking member, the contact between the electrolytically produced water and the gas, which floats on the surface of the contained electrolytically produced water and is interposed between the surface of the electrolytically produced water and the gas above it, As long as it is a member that forms a contact-blocking layer that blocks light, a member having an appropriate shape and structure can be adopted.
[0035]
In the present embodiment, as the contact blocking member 22, a large number of two types of floating balls 22a and 22b having different sizes are employed. The floating balls 22a and 22b are appropriately arranged side by side due to the difference in shape and buoyancy to be in a state close to close packing, and cover the surface of the electrolytically generated water accurately. Thereby, in the electrolyzed water stored in the storage tank 21, the contact between the water surface and the gas is substantially cut off, and the generation of gas from the stored electrolyzed water is largely suppressed. it can.
[0036]
A large number of two types of floating balls 22a and 22b having different sizes employed in the present embodiment are used to regulate the internal shape of the storage tank 21 and the floating of the contact blocking member by various components disposed therein. It corresponds to. The floating balls 22a, 22b have a high degree of freedom in the parallel arrangement on the surface of the contained electrolysis water, and are arranged in a finely packed state corresponding to the internal shape of the storage tank 21. The contact between the water surface of the electrolyzed water and the gas is substantially cut off in parallel with the finely packed state, avoiding the components arranged in the water.
[0037]
In the present embodiment, floating balls of an appropriate material can be used as the floating balls 22a and 22b. For example, plastic floating balls of an appropriate shape can be used. The contact blocking member is suitable for storing electrolyzed water at room temperature such as room temperature. In addition, suitably shaped ice blocks can be employed as the floating balls 22a and 22b. The contact blocking member (ice block) is suitable for storing electrolyzed water in a cooled state at room temperature or lower.
[0038]
Further, when ice blocks are employed as the floating balls 22a and 22b, the ice blocks are melted to form an aqueous layer W shown in FIG. The water layer W forms a contact-blocking layer with each ice block, and the contact-blocking layer functions to absorb a gas to be generated from the electrolyzed water, thereby enhancing the effect of blocking the electrolyzed water.
[0039]
In the present embodiment, a cylindrical beaker made of glass having a diameter of 15 cm and a capacity of 500 mL is used as the storage tank, and ice blocks are used as the floating balls 22a and 22b as the contact blocking members. An experiment was conducted to measure the amount of chlorine gas generated.
[0040]
In this experiment, 400 mL of electrolytically generated acidic water was stored in a beaker, and a large number of ice blocks of different sizes were floated on the surface of the stored electrolytically generated acidic water. In this state, two types of experimental devices were constructed with beakers whose upper end openings were sealed.
[0041]
In these experimental devices, a space with a height of 2 cm is formed between the surface of the electrolytically generated acidic water contained in the beaker and the lid, and the gas in the space after 5 minutes and 10 minutes is formed. All were sampled, and the chlorine gas concentration in the sampled gas was measured. Table 1 shows the obtained results.
[0042]
[Table 1]

[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram schematically showing an entire electrolyzed water generation device provided with a storage device according to the present invention.
FIG. 2 is a longitudinal sectional view of the storage device.
FIG. 3 is a cross-sectional view of the storage device.
FIG. 4 is a graph showing a measurement result of a temporal change of available chlorine in an electrolytically produced acidic water.
FIG. 5 is a graph showing a relationship between an air contact area of an electrolytically generated acidic water calculated from the measurement result and a chlorine volatilization amount for one minute.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Separation membrane electrolysis tank, 20a, 20b ... Reservoir, R1, R2 ... Electrolysis chamber, 11 ... Tank main body, 12 ... Diaphragm, 13a, 13b ... Electrode plate, 14 ... Supply pipeline, 15a, 15b ... Outflow pipeline , 21 ... storage tank, 22 ... contact blocking member, 22a, 22b ... floating ball.

Claims (9)

A storage method for storing electrolyzed water generated by electrolyzing water to be electrolyzed, wherein the electrolyzed water contained in the storage tank is combined with a surface of the electrolyzed water and a gas on the water surface. A method for storing electrolyzed water, wherein the water is stored in a state where contact is interrupted. The method for storing electrolyzed water according to claim 1, wherein a contact blocking layer is formed on a surface of the electrolyzed water contained in the storage tank, thereby forming a gas on the water surface with the electrolyzed water. A method for storing electrolyzed water, comprising: blocking contact with water. 3. The method for storing electrolyzed water according to claim 2, wherein the contact blocking layer is formed by a contact blocking member floating on a water surface of the electrolyzed water. 4. The method for storing electrolyzed water according to claim 3, wherein a plurality of floating balls of different sizes are used as the contact blocking member forming the contact blocking layer. Method. The method for storing electrolytically generated water according to claim 4, wherein the floating sphere is a plurality of ice blocks of a plurality of types having different sizes. In the method for storing electrolyzed water according to claim 2, the contact blocking layer is formed by melting a plurality of ice blocks of a plurality of types having different sizes floating on the surface of the electrolyzed water and melting the ice blocks. A method for storing in electrolytically produced water, characterized in that it is formed in an aqueous layer. A storage device for storing electrolyzed water generated by electrolyzing water to be electrolyzed, which is connected to an electrolyzer for electrolyzing the electrolyzed water and stores electrolyzed water generated in the electrolyzer. And a contact blocking member that floats on the surface of the electrolyzed water stored in the storage tank. The storage device for electrolyzed water according to claim 7, wherein the storage tank includes a control unit for controlling a storage amount of the electrolyzed water, and a plurality of floating members of different sizes as the contact blocking member. A storage device for electrolytically produced water, characterized by employing balls. 9. The storage device for electrolyzed water according to claim 8, wherein the floating ball is a plurality of ice blocks of a plurality of types having different sizes.

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