JP4031984B2 - Method and apparatus for storing electrolytically generated water - Google Patents

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]
BACKGROUND OF THE INVENTION
The present invention relates to a storage method and storage device for electrolytically generated water.
[0002]
[Prior art]
Electrolyzed water produced by electrolysis using a dilute aqueous solution of 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 membrane 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. . Electrolyzed acidic water has a high bactericidal ability and is used as a bactericidal agent or aseptic water. Electrolytically generated alkaline water has a high detergency and is used as a cleaning agent.
[0003]
In a usage mode of electrolytically generated water, there is a case where it is temporarily used in a large amount. Taken. In such a storage method, gas of various components dissolved from the electrolytically generated water accommodated in the storage tank is generated over time, and this countermeasure for gas treatment becomes a problem.
[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, but these components become gaseous (chlorine gas, hydrogen gas, etc.) and change over time. Will occur. When chlorine gas, hydrogen gas, or the like is continuously released into the work space where the electrolyzed water generating device is installed, it raises the problem of sanitary work space and rust prevention of the device.
[0005]
Conventionally, in this type of storage method of electrolytically generated water, generally, an exhaust pipe that faces the outside is connected to a storage tank in which electrolytically generated water is accommodated, and gas generated in the storage tank is passed through the exhaust pipe. Exhaust means for exhausting outdoors is adopted. In some cases, an adsorption device that contains an adsorbent is installed in the middle of the exhaust pipe, at the front side or the rear side thereof, and adsorbs chemical substances in the gas generated in the storage tank to exhaust the exhaust outdoors. Exhaust means for exhausting is also taken.
[0006]
In these exhaust means, basically, by controlling the release of gas generated in the storage tank to the work space, the problem in terms of sanitation and rust prevention of the device in the work space is solved. In the former exhaust means, the chemical substances in the gas are diluted in the atmosphere to prevent local contamination of the atmosphere. In the latter exhaust means, the chemical substances in the gas are removed before the gas is discharged to the outside air. Air pollution is prevented by adsorption removal. Any of these exhaust means exhausts the gas generated in the storage tank to the outside, and if the exhaust means breaks down, avoid releasing the gas generated in the storage tank to the work space. I can't.
[0007]
Instead of such exhaust means, means for restricting release to the work space without discharging the gas generated in the storage tank to the outside (referred to as gas release restricting means) has been developed and proposed (for example, (See Patent Document 1).
[0008]
The gas release regulating means comprises a storage tank for storing electrolytically generated acidic water, which is electrolytically generated water, and a storage tank for storing electrolytically generated alkaline water, in a gas-liquid separation tank, and these two gas-liquid separation tanks are connected to a pipe. Each is connected to an electrolyzed water tank, which is a tank for preparing electrolyzed water, via a path.
[0009]
In the gas emission control means, the gas generated in each gas-liquid separation tank is collected in the electrolyzed water tank through each connection pipe, thereby releasing the gas into the work space and the outside. It is something to regulate. In other words, the gas release regulating means absorbs the gas generated in the storage tank into the electrolyzed water in a closed system.
[0010]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-308885
[Problems to be solved by the invention]
However, in the gas emission regulating means disclosed in the above-mentioned Patent Document 1, the electrolyzed water generating apparatus is larger in size than the conventional two exhaust means and equipped with the gas emission regulating means. There is a problem that a large installation space must be secured in order to install the gas generator, and, similar to the two exhaust means described above, if the gas release regulating means fails, the gas generated in the storage tank Release into the work space is inevitable.
[0012]
Therefore, the object of the present invention, unlike the above-described exhaust means and gas release regulating means, is to greatly suppress the generation of gas from the electrolytically generated water stored in the storage tank over time, and It is to largely suppress the release of gas into the work space and the discharge to the outdoors.
[0013]
[Means for Solving the Problems]
The present invention relates to a storage method and storage device for electrolytically generated water. The method for storing electrolyzed water according to the present invention is a storage method for storing electrolyzed water produced by electrolyzing water to be electrolyzed. The electrolyzed water stored in a storage tank is electrolyzed. It stores in the state which interrupted | blocked the contact with the water surface and the gas on the water surface of the produced water.
[0014]
In the electrolytically generated water storage method according to the present invention, by forming a contact blocking layer on the surface of the electrolytically generated water stored in the storage tank, the surface of the electrolytically generated water and the gas on the same surface Can be cut off. The contact fault can be formed by a contact blocking member that floats on the surface of the electrolytically generated water. As the contact blocking member for forming the contact blocking layer, a plurality of types of floating balls of different sizes can be used, and a plurality of types of ice blocks of different sizes are used as the floating balls. can do.
[0015]
Further, in the electrolytically generated water storage method according to the present invention, the contact blocking layer is formed by melting a plurality of types of ice blocks of different sizes floating on the surface of the electrolytically generated water and the ice blocks being melted. It can be formed in a water layer.
[0016]
The electrolyzed water storage device according to the present invention is a storage device for storing electrolyzed water generated by electrolyzing electrolyzed water, and is connected to an electrolyzer that electrolyzes electrolyzed water. And a contact blocking member that floats on the surface of the electrolyzed water stored in the storage tank.
[0017]
In the electrolyzed water storage device according to the present invention, when the storage tank is provided with a control unit that controls the amount of electrolyzed water accommodated, a plurality of types of different sizes can be used as the contact blocking member. Can be used. As the floating ball, a plurality of types of ice blocks having different sizes can be adopted.
[0018]
[Operation and effect of the invention]
In the method and apparatus for storing electrolyzed water according to the present invention, the electrolyzed water stored in the storage tank is blocked from contact with a gas such as air remaining in the storage tank. Generation of components dissolved in the gas as a gas is restricted or greatly suppressed.
[0019]
For this reason, according to the method and apparatus for storing electrolyzed water according to the present invention, it is not necessary or necessary to release the gas in the storage tank containing the electrolyzed water into the work space and discharge it to the outside air. Become.
[0020]
Further, according to the method and apparatus for storing electrolyzed water according to the present invention, the gas in the storage tank that stores electrolyzed water is not exhausted or recirculated. There is no problem with the gas emission control means.
[0021]
In the electrolyzed water storage method and storage device according to the present invention, if a plurality of types of floating balls having different sizes are used for forming the contact blocking layer, the inside of the tank is not a simple shape, In addition, it is possible to sufficiently cope with a storage tank having an arrangement part such as a control part for controlling the amount of electrolyzed water contained in the tank.
[0022]
If a plurality of types of ice blocks of different sizes are used for forming the contact blocking layer, the water layer formed by melting the ice blocks also functions as the contact blocking layer, and the water layer is electrolyzed. While absorbing the gas which is going to generate | occur | produce from produced | generated water and improving a contact interruption | blocking effect, it can fully cope with the use used by electrolysis produced | generated water in a cooling state.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a method and a storage device for electrolyzed water, and FIG. 1 schematically shows an electrolyzed water generator provided with the storage device according to the present invention. Fig. 5 schematically shows a longitudinal section and a transverse section of the storage device. 4 and 5 are graphs showing the results of experiments conducted to establish the storage method and storage device according to the present invention.
[0024]
The electrolyzed water generating apparatus includes a diaphragm electrolyzer 10, and includes, as a storage device, an acidic water storage device 20a that stores electrolytically generated acidic water and an alkaline water storage device 20b that stores electrolytically generated alkaline water. Yes. Both the storage devices 20a and 20b have the same configuration. In the following description of the storage devices 20a and 20b, the storage devices 20a and 20b will be described as the same storage device 20 except when the storage devices 20a and 20b are used separately.
[0025]
The diaphragm electrolyzer 10 that constitutes the electrolyzed water generating apparatus uses a dilute aqueous solution of salt as electrolyzed water, and is arranged in a diaphragm 12 that partitions the inside of the tank body 11 and each compartment partitioned by the diaphragm 12. The electrode plates 13a and 13b are provided to form the electrolytic chambers R1 and R2. The electrolytic chambers R1 and R2 are connected to a branch line of a supply pipe 14 for supplying water to be electrolyzed, and an outflow pipe for flowing out the electrolytically generated water generated in the electrolytic chambers R1 and R2. The paths 15a and 15b are connected.
[0026]
Among 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 from 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 from the outflow pipe 15b. The outflow pipe line 15a is connected to a storage tank 21 constituting the storage device 20a. Moreover, the outflow pipe line 15b is connected to the storage tank 21 which comprises the storage apparatus 20b.
[0027]
Accordingly, one storage device 20a is a dedicated storage device that stores electrolytically generated acidic water, and the other storage device 20b is a dedicated storage device that stores 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 carried out for storing each electrolyzed water generated in the diaphragm electrolyzer 10 of the electrolyzed water generating apparatus, and the electrolyzed water according to the present invention. The generated water storage device is implemented in the storage device 20 (20a, 20b).
[0029]
Assuming the storage state in the electrolytically generated water storage tank, the present inventor has the surface of the water surface of the electrolytically generated acidic water contained in a cylindrical glass beaker with various opening dimensions and the chlorine gas. We are experimenting to confirm the relationship with volatilization. In this experiment, as the electrolytically generated water, electrolytically generated acidic water having a pH of 2.62, an effective chlorine concentration of 38 mg / L, an oxidation-reduction potential of 1155 mV, and a water temperature of 20 ° C. was used, and the diameter was 5 cm, 8.6 cm, 10.4 cm, 13 cm, Five kinds of beakers of 15 cm were charged with 500 mL of the electrolytically generated acidic water and allowed to stand in a room temperature room (under a fluorescent lamp) at 20 ° C., and the change over time in the effective chlorine in the electrolytically generated acidic water was measured.
[0030]
The measurement results are shown in the graph of FIG. From the experimental results, the relationship between the air contact area of the electrolytically generated acidic water and the amount of chlorine volatilization for 1 minute was calculated on the assumption that all of the lost chlorine 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 generated acidic water generates the chlorine component in the electrolytically generated acidic water as chlorine gas over time, and the amount of generated chlorine gas is large in the air contact area of the electrolytically generated acidic water. It can be confirmed that if the air contact area is reduced, the chlorine gas generation amount can be suppressed, and if the air contact area of the electrolytically generated acidic water is reduced to zero, the chlorine gas generation amount is substantially zero. It can be estimated that it can be suppressed.
[0032]
Based on these findings, in the embodiment of the method for storing electrolytically generated water according to the present invention, in the storage tank 21 of the storage device 20a, the water surface of the electrolytically generated acidic water accommodated, the air on the same surface, etc. Electrolytically generated acidic water is stored in a state where contact with the gas is blocked. Further, in the storage tank 21 of the storage device 20b, the electrolytically generated alkaline water is stored in a state where contact between the water surface of the electrolytically generated alkaline water accommodated and a gas such as air on the water surface is blocked. Yes.
[0033]
According to the storage method, generation of chlorine gas from the electrolytically generated acidic water can be largely suppressed in the storage tank 21 of the storage device 20a, and the electrolytically generated alkalinity is stored in the storage tank 21 of the storage device 20b. Generation of hydrogen gas from the water can be greatly suppressed. Thereby, the discharge | release to the outdoors of the gas which has the chemical substance generated in each storage device 20a, 20b as a main component becomes unnecessary, or the discharge | release to the outdoors can be suppressed significantly.
[0034]
The storage device according to the present invention is used for carrying out the storage method. In the embodiment of the electrolyzed water storage device according to the present invention, as shown in FIGS. 2 and 3, the storage device 20. (20a, 20b) is configured by a storage tank 21 that stores electrolytically generated water and a contact blocking member 22 that floats on the surface of the electrolytically generated water that is stored. In the storage device according to the present invention, as the contact blocking member, the contact between the electrolyzed water and the gas floating on the surface of the electrolyzed water accommodated and interposed between the water surface of the electrolyzed water and the gas above it. As long as it is a member that forms a contact blocking layer that blocks the above, a member having an appropriate shape and structure can be adopted.
[0035]
In this embodiment, two types of floating balls 22a and 22b having different sizes are employed as the contact blocking member 22. The floating balls 22a and 22b are appropriately in parallel with each other due to the difference in shape and buoyancy, and close to the fine filling, and accurately cover the water surface of the electrolyzed water. Thereby, in the electrolyzed water accommodated in the storage tank 21, the contact of the water surface and gas is substantially interrupted | blocked, and generation | occurrence | production of the gas from the electrolyzed water accommodated is largely suppressed. it can.
[0036]
Two types of floating balls 22a and 22b of different sizes adopted in the present embodiment are used for the internal shape of the storage tank 21 and the floating restriction of the contact blocking member by various parts arranged inside the storage tank 21. It corresponds to. The floating balls 22a and 22b have a high degree of freedom in parallel arrangement on the surface of the electrolyzed water contained therein, and are arranged in parallel in a closely packed state corresponding to the internal shape of the storage tank 21. In parallel with the finely packed state while avoiding the components arranged in the above, the contact between the water surface of the electrolyzed water and the gas is substantially cut off.
[0037]
In the present embodiment, floating balls made of an appropriate material can be used as the floating balls 22a and 22b. For example, appropriately shaped plastic floating balls can be used. The contact blocking member is suitable for storing electrolytically generated water at room temperature such as room temperature. In addition, ice blocks having an appropriate shape can be employed as the floating balls 22a and 22b. The contact blocking member (ice block) is suitable for storing electrolytically generated water in a cooled state at room temperature or lower.
[0038]
When ice blocks are used as the floating balls 22a and 22b, the ice blocks are melted to form a water layer W indicated by W in FIG. 2 on the surface of the electrolytically generated water. The water layer W forms a contact blocking layer together with each ice block, and the contact blocking layer functions to absorb the gas to be generated from the electrolytically generated water, thereby enhancing the blocking effect of the electrolytically generated water.
[0039]
In the present embodiment, a glass cylindrical beaker having a diameter of 15 cm and a capacity of 500 mL is used as a storage tank, and ice blocks are used as the floating balls 22a and 22b that are contact blocking members, and from the electrolytically generated acidic water used in the above-described experiment. An experiment was conducted to measure the amount of chlorine gas generated.
[0040]
In this experiment, 400 mL of electrolytically generated acidic water was accommodated in a beaker, and a beaker with the top opening sealed in a state where a large number of ice blocks of different sizes were suspended on the surface of the stored electrolytically generated acidic water, and the ice mass was not suspended. Two types of experimental apparatus of beakers with the upper end opening sealed in the state were configured.
[0041]
In these experimental devices, a space of 2 cm in height is formed between the water 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 collected and the chlorine gas concentration in the collected gas was measured. The obtained results are shown in Table 1.
[0042]
[Table 1]

[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram schematically showing an entire electrolyzed water generating device including 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 measurement results of changes over time in effective chlorine in electrolytically generated acidic water.
FIG. 5 is a graph showing the relationship between the air contact area of electrolyzed acidic water calculated from the measurement results and the chlorine volatilization amount for 1 minute.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Separator membrane electrolytic cell, 20a, 20b ... Storage apparatus, R1, R2 ... Electrolytic chamber, 11 ... Tank main body, 12 ... Diaphragm, 13a, 13b ... Electrode plate, 14 ... Supply line, 15a, 15b ... Outflow line , 21 ... storage tank, 22 ... contact blocking member, 22a, 22b ... floating ball.

Claims (9)

A storage method for storing electrolytically generated water generated by electrolyzing water to be electrolyzed. The electrolytically generated water contained in a storage tank is divided into a water surface and a gas on the same water surface. A method for storing electrolytically generated water, wherein the method stores water in a state where contact is cut off. The method for storing electrolytically generated water according to claim 1, wherein a gas on the same surface as the surface of the electrolytically generated water is formed by forming a contact blocking layer on the surface of the electrolytically generated water accommodated in the storage tank. A method for storing electrolytically generated water, characterized in that contact with the water is cut off. 3. The electrolytically generated water storage method according to claim 2, wherein the contact blocking layer is formed by a contact blocking member that floats on the surface of the electrolytically generated water. 4. The electrolytically generated water storage method according to claim 3, wherein a plurality of types of floating balls having different sizes are employed as the contact blocking member that forms the contact blocking layer. Method. 5. The method for storing electrolytically generated water according to claim 4, wherein the floating ball is a plurality of types of ice blocks having different sizes. 3. The method for storing electrolyzed water according to claim 2, wherein the contact blocking layer is formed by melting a plurality of types of ice blocks of different sizes floating on the surface of the electrolyzed water and the ice blocks being melted. A method for storing in electrolyzed water, characterized in that it is formed in a water layer. A storage device for storing electrolyzed water generated by electrolyzing water to be electrolyzed, and storing electrolyzed water generated in the electrolyzer connected to an electrolyzer that electrolyzes water to be electrolyzed And a contact blocking member that floats on the surface of the electrolyzed water stored in the storage tank. The electrolyzed water storage device according to claim 7, wherein the storage tank includes a control unit that controls the amount of electrolyzed water accommodated, and the contact blocking member includes a plurality of types of floats having different sizes. An electrolyzed water storage device characterized by employing a ball. The electrolyzed water storage device according to claim 8, wherein the floating ball is a plurality of types of ice blocks having different sizes.

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