JP2006035007A - Method and apparatus for producing electrolytic water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for producing electrolytic water, by each of which the electrolytic water having the same specified characteristic is produced selectively by distinctively using two or more kinds of the water, which are to be electrolyzed and contain mutually different electrolytic auxiliaries, and subjecting each of two or more kinds of the water to be electrolyzed to membrane electrolysis. <P>SOLUTION: When any of two or more kinds of the water to be electrolyzed is used and subjected to membrane electrolysis, the electrolyzing condition of the selected water to be electrolyzed is set beforehand to produce the electrolytic water having the same specified characteristic. When the water to be electrolyzed is changed selectively, the electrolyzing condition is changed to the set electrolyzing condition of the selected water to be electrolyzed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a method and apparatus for producing electrolyzed water for electrolyzing electrolyzed water in a diaphragm electrolytic cell to produce electrolyzed acidic water and electrolyzed alkaline water in a synchronized manner, and particularly different from each other. The present invention relates to a method and an apparatus for producing electrolyzed water for producing electrolyzed water having the same specified characteristics by properly using a plurality of types of electrolyzed water containing an electrolysis assistant.

  Electrolytically generated acidic water and electrolytically generated alkaline water, which are generated synchronously by electrolyzing water to be electrolyzed containing electrolytic assistants in a diaphragm electrolytic cell, are used in a wide range of fields depending on the functions of each. ing. In particular, electrolytically generated acidic water has bactericidal ability, germicide control ability, plant growth assisting ability, etc., for example, as water for washing and sterilizing treatment of various equipment and equipment, As water for disease control treatment during the cultivation of various plants, it is used as water for growth assistance treatment during the cultivation of various plants. In addition, electrolytically generated alkaline water has cleaning ability against contamination caused by organic matter, etc., food quality improvement ability, etc., and is therefore used as water for cleaning treatment of various equipment and as water for treatment that improves the quality of food. .

  By the way, in the method for producing electrolyzed water, sodium chloride, specifically, sodium chloride is generally used as an electrolysis aid for electrolyzed water from the viewpoint of cost. However, for example, in the production of electrolyzed water for the agricultural field, potassium chloride, which is extremely expensive compared to salt, as an electrolysis aid, especially considering plant nutrients and the effect of sodium on plants, etc. Is used.

  For example, in consideration of the usage mode of each electrolyzed water in the agricultural field, the electrolyzed water can be used directly on a cultivated plant that directly touches the roots, stems, leaves, etc. of the plant to be cultivated. There are usage modes that come into contact and usage modes that are used for cleaning sterilization processing and cleaning processing of farm equipment, other materials, facilities, and the like. Among these usage modes, in the latter usage mode, which is a usage mode that does not come into direct contact with the cultivated plant, the electrolysis aid contained in the electrolyzed water does not need to be potassium chloride, and is compared with potassium chloride. Thus, very inexpensive salt is sufficient. For this reason, in the production of electrolyzed water having both of these modes of use, a single electrolyzed water production apparatus can use a plurality of types of electrolyzed water containing different electrolysis auxiliary agents, and such a plurality of such electrolyzed water. It would be economically advantageous if diaphragm electrolysis can be carried out using different types of electrolyzed water.

  In this case, the electrolytically generated acidic water and the electrolytically generated alkaline water, which are electrolytically generated water, require characteristics depending on the application, so at least for the specified characteristics, even if the type of electrolyzed water is switched, It is required that electrolytically generated water with the same characteristics be produced. Regarding the method and apparatus for producing electrolyzed water corresponding to such demands, the actual situation has not yet been proposed.

  However, a manufacturing method and a manufacturing apparatus that can use two types of electrolyzed water containing different electrolysis aids by one electrolytically generated water manufacturing apparatus are “electrolytic water conditioning method and apparatus”. A patent application has been filed under the name (see Patent Document 1).

The electrolytic water conditioning method and apparatus are intended to reduce the pH of the generated electrolytically generated acidic water to the low value necessary to have a strong sterilizing ability. The electrolyzed water preparation apparatus includes a diaphragm electrolyzer, a non-diaphragm electrolyzer, an electrolyzed water storage tank containing electrolyzed water containing an electrolysis assistant (NaCl + CaCl ₂ ), and an electrolysis assistant (NaCl + HCl). A storage tank for containing the electrolyzed water to be contained is provided. In the electrolytic water conditioning method using the electrolytic water conditioning apparatus, the electrolytically generated acidic water generated in the diaphragm electrolyzer is obtained by electrolyzing the electrolytically generated acidic water generated in the diaphragm electrolyzer again in the diaphragm electrolyzer. In this two-time electrolysis, if necessary, either one of the electrolyzed water is introduced into the diaphragm electrolyzer and the other electrolyzed water is added to the non-diaphragm electrolyzer. The method to introduce is taken.
JP-A-6-238280

  By the way, although the said electrolyzed water conditioning method and apparatus are a manufacturing method and a manufacturing apparatus which can use two types of electrolyzed water containing different electrolysis auxiliary agents, in order to selectively use each electrolyzed water selectively It is intended to significantly reduce the pH of electrolyzed acidic water generated by diaphragm membrane electrolysis using diaphragm water electrolysis as needed, using each electrolyzed water arbitrarily. . In addition, in the electrolytic water conditioning method and apparatus, two types of electrolyzed water containing different electrolysis aids are selectively used to selectively produce electrolyzed water having the same specified characteristics. In addition, such electrolytically generated water cannot be produced.

  An object of the present invention is a method and apparatus for producing electrolyzed water that performs diaphragm membrane electrolysis using different types of electrolyzed water containing different electrolysis assistants, and the specified characteristics are the same as each other. It is to selectively produce a certain electrolytically generated water.

The present invention relates to a method and an apparatus for producing electrolyzed water in which electrolyzed water is electrolyzed in a diaphragm electrolyzer to produce electrolyzed acidic water and electrolyzed alkaline water in a synchronized manner. The present invention relates to a method and an apparatus for producing electrolyzed water for selectively producing electrolyzed water having the same specified characteristics by properly using a plurality of types of electrolyzed water containing an agent.

  Therefore, in the method for producing electrolyzed water according to the present invention, when diaphragm electrolysis is performed using each electrolyzed water, electrolytic conditions in which the specified characteristics become the same characteristics are set in advance, In accordance with the selective switching of each electrolyzed water, the electrolysis conditions are switched to set electrolysis conditions.

  In the method for producing electrolyzed water according to the present invention, each of the electrolyzed water includes electrolyzed water whose main component is sodium chloride (salt) as an electrolysis assistant and potassium chloride as a main component. It is preferable to employ electrolyzed water. In the method for producing electrolyzed water according to the present invention, the specific characteristic of the electrolyzed water is preferably the pH of the electrolyzed acidic water or the residual chlorine concentration. In the method for producing electrolyzed water according to the present invention, the electrolysis condition set in advance is preferably an electrolysis current value.

  Moreover, the apparatus for producing electrolyzed water according to the present invention is a production apparatus for carrying out the method for producing electrolyzed water according to the present invention, and comprises a diaphragm membrane electrolytic cell and each electrolytic chamber of the diaphragm membrane electrolytic cell. A water introduction line for introducing electrolyzed water into a pair, a pair of electrolyzed water outlet lines for deriving each electrolyzed water produced in each electrolysis chamber of the diaphragm electrolyzer, and containing different electrolysis auxiliary agents Electrolyzed water switching means for selectively introducing electrolyzed water to be introduced into the introduction pipe of the electrolyzed water, and electrolysis condition switching means for switching electrolysis conditions in accordance with switching of the electrolyzed water switching means. It is what.

The method for producing electrolyzed water according to the present invention uses a plurality of types of electrolyzed water containing different electrolysis auxiliary agents, and selectively produces electrolyzed water having the same specified characteristics. An apparatus for producing electrolyzed water according to the present invention is a production apparatus for carrying out the method for producing electrolyzed water according to the present invention.

  In the method for producing electrolyzed water according to the present invention, in diaphragm membrane electrolysis using each electrolyzed water, the electrolysis conditions under which the electrolyzed water having the same specific characteristics are generated are set in advance. The electrolysis conditions are switched to the set electrolysis conditions according to the selective switching of the electrolyzed water.

  Thereby, electrolyzed water (electrolyzed acidic water and electrolytically generated alkaline water) having the same desired characteristics can be produced by properly using each electrolyzed water containing different electrolysis assistants. For this reason, in the production of electrolyzed water for use that requires the use of an expensive electrolysis assistant, the electrolysis water is switched to electrolysis water containing an expensive electrolysis assistant, and an inexpensive electrolysis assistant is used. In the production of electrolyzed water for use in which an agent is sufficient, the electrolyzed water can be switched to electrolyzed water containing an inexpensive electrolysis aid.

  For this reason, according to the method and apparatus for producing electrolyzed water according to the present invention, a plurality of electrolyzed water containing different electrolysis assistants can be selectively used by a single electrolyzed water producing apparatus. Electrolyzed water can be produced economically advantageously.

  The method for producing electrolyzed water according to the present invention selectively uses electrolyzed water having the same specified characteristics by selectively using a plurality of types of electrolyzed water containing different electrolysis auxiliary agents. It is a manufacturing method. Moreover, the apparatus for producing electrolyzed water according to the present invention is a production apparatus suitable for carrying out the method for producing electrolyzed water according to the present invention.

  The apparatus for producing electrolyzed water according to an embodiment of the present invention is an apparatus for producing electrolyzed water in a usage mode for each field of agriculture, and electrolyzed water containing sodium chloride (sodium chloride) as an electrolysis aid. The electrolytically generated acidic water and the electrolytically generated alkaline water can be produced by arbitrarily using electrolyzed water containing potassium chloride as an electrolysis auxiliary agent. Therefore, the apparatus for producing electrolyzed water can carry out the method for producing electrolyzed water according to the present invention.

  In the field of use of electrolyzed water in the field of agriculture, the mode of use utilizing the ability to disinfect electrolyzed acidic water, the ability to eliminate germs, the ability to assist plant growth, the ability to wash electrolyzed alkaline water, and the assistance to plant growth There are usage modes that utilize Noh etc. Among these usage modes, electrolytically generated water that uses a mode of direct contact with the roots, stems, or leaves of plants, such as electrolytically generated acidic water, uses the K component derived from potassium chloride, which is an electrolysis aid, as a nutrient. In addition, it is necessary to avoid the influence of Na caused by sodium chloride which is an electrolytic assistant. For this reason, electrolyzed water containing potassium chloride as an electrolysis assistant is employed as electrolyzed water for producing the electrolyzed acidic water. However, potassium chloride is a very expensive electrolysis aid compared to sodium chloride (sodium chloride).

  On the other hand, in the usage mode intended to clean various agricultural machinery, equipment, and facilities, there is no problem such as the advantage that the electrolytic assistant is potassium chloride and the disadvantage that it is salt, so that the electrolyzed acidic water Electrolyzed water containing sodium chloride as an electrolytic aid is employed as the electrolyzed water for producing the water. Since sodium chloride is very inexpensive as compared with potassium chloride, it is economically advantageous to use electrolyzed water containing sodium chloride as an electrolysis auxiliary.

  Therefore, when the generated electrolyzed water is used in the agricultural field, the electrolyzed water is produced by using a single electrolyzed water production apparatus, and the electrolyzing aid is potassium chloride. It is economically advantageous to be able to use the water to be electrolyzed arbitrarily as needed. In this case, it is important that the electrolyzed water has characteristics according to the use mode. For example, in the usage mode of the electrolytically generated acidic water, the sterilizing ability of the electrolytically generated acidic water is an important factor, and the sterilizing ability greatly depends on the pH and residual chlorine concentration of the electrolytically generated acidic water. For this reason, in the usage mode of electrolytically generated acidic water, both electrolytically generated acidic water that is selectively produced has a pH or residual chlorine concentration regardless of whether the electrolytic assistant contained in the electrolyzed water is salt or potassium chloride. It is required that the values are substantially the same.

  In one embodiment of the method for producing electrolyzed water according to the present invention, attention is paid to pH, which is a specific characteristic of electrolyzed acidic water, and electrolysis is generated using electrolyzed water whose electrolytic assistant is salt. Used in diaphragm membrane electrolysis by setting the electrolysis conditions so that the pH of the generated acidic water and the pH of the electrolyzed acidic water generated using electrolyzed water whose electrolytic assistant is potassium chloride are approximately the same value. When the electrolyzed water to be selectively switched, the electrolysis conditions are switched to preset electrolysis conditions in accordance with the switching. In the manufacturing method according to an embodiment of the present invention, the electrolysis conditions under which the pH values of both electrolysis-generated acidic waters are substantially the same are set based on an electrolysis experiment described later.

  As a result, it is possible to selectively produce electrolyzed acidic water having substantially the same pH by using different electrolyzed waters containing different electrolysis aids (salt and potassium chloride). For this reason, in the production of electrolytically generated acidic water in a use mode that requires the use of an expensive electrolysis assistant, the electrolysis water is switched to electrolysis water containing an expensive electrolysis assistant (potassium chloride), and In the production of electrolytically generated acidic water in a use mode in which an inexpensive electrolysis assistant (salt) is sufficient, the electrolysis water can be switched to electrolysis water containing an inexpensive electrolysis assistant (salt).

  The method for producing electrolyzed water according to the present invention can be carried out using the electrolyzed water producing apparatus shown in FIG. FIG. 1 shows an embodiment of an apparatus for producing electrolyzed water according to the present invention. The apparatus for producing electrolyzed water mainly includes a diaphragm electrolyzer 10, a preparation mechanism 20 for electrolyzed water, and a control device 30.

  The diaphragm electrolysis cell 10 is known per se, and the cell body 11 includes an anode-side electrolysis chamber R1 and a cathode-side electrolysis chamber R2 that are formed by being partitioned by a diaphragm 12 having ion permeability at the center. I have. In the diaphragm electrolytic cell 10, an electrolytic current of a predetermined voltage is applied from the control device 30 to the electrodes 13 a and 13 b disposed in the anode-side electrolysis chamber R 1 and the cathode-side electrolysis chamber R 2. Yes. The control device 30 controls application of voltage and current to the electrodes 13a and 13b. The tank body 11 has electrolyzed water communicated with the electrolyzed water introduction lines 14a and 14b communicating with the anode-side electrolysis chamber R1 and the cathode-side electrolysis chamber R2, and the anode-side electrolysis chamber R1 and the cathode-side electrolysis chamber R2. The lead-out conduits 15a and 15b are provided.

  In the diaphragm electrolytic cell 10, the electrolyzed water introduced into the anode-side electrolysis chamber R1 and the cathode-side electrolysis chamber R2 through the introduction pipes 14a and 14b during the electrolysis operation is the anode-side electrolysis chamber R1 and the cathode-side electrolysis chamber. R2 conducts diaphragm membrane electrolysis with a predetermined electrolysis voltage (electrolysis condition) at a predetermined electrolysis voltage. The electrolytically generated water (electrolytically generated acidic water) generated in the anode side electrolysis chamber R1 is led out from the lead-out conduit 15a and used for a desired application. The electrolytically generated water (electrolytically generated alkaline water) generated in the cathode side electrolysis chamber R2 is led out from the lead-out conduit 15a and used for a desired application. The control device 30 controls the voltage and current applied to the electrodes 13a and 13b of the electrolysis chambers R1 and R2.

  The electrolyzed water preparation mechanism 20 includes undiluted electrolyzed water tanks 21a and 21b containing electrolyzing assistants that are different from each other, and undiluted liquid supply pipes that connect the undiluted liquid tanks 21a and 21b to the tap water introduction line 22. 23, a switching valve 24 and a metering pump 25 are provided in the middle of the stock solution supply line 23. Of each of the stock solution tanks 21a and 21b, the first stock solution tank 21a contains a concentrated aqueous solution of sodium chloride, and the second stock solution tank 21b contains a concentrated aqueous solution of potassium chloride.

  In the preparation mechanism 20, during the electrolysis operation of the apparatus for producing electrolyzed water, the stock solution of the electrolyzed water stored in each stock solution tank 21 a, 21 b is continued by a predetermined amount through the switching valve 24 and the metering pump 25. Then, it is introduced in the middle of the tap water introduction pipeline 22. The stock solution of the electrolyzed water introduced into the introduction pipe line 22 is diluted with the tap water uniformly mixed with the tap water in the introduction pipe line 22 and becomes diluted salt water having a set concentration. The diluted salt water is continuously introduced into the anode-side electrolysis chamber R1 and the cathode-side electrolysis chamber R2 of the tank body 11 as electrolyzed water.

  Further, in the preparation mechanism 20, the electrolyzed water introduced into the anode-side electrolysis chamber R 1 and the cathode-side electrolysis chamber R 2 of the tank body 11 by the switching operation of the switching valve 24 is used as a dilute aqueous solution of sodium chloride and a dilute solution of potassium chloride. It can be arbitrarily switched to an aqueous solution. The switching operation of the switching valve 24 is controlled by the control device 30.

  In the electrolyzed water production apparatus according to the present invention, each of the stock solution tanks 21a and 21b can be changed to a preparation tank for preparing electrolyzed water that is a set diluted salt water. As a result, it is possible to adopt means for directly introducing the diluted salt water contained in the preparation tank into the anode-side electrolysis chamber R1 and the cathode-side electrolysis chamber R2 of the tank body 11 as water to be electrolyzed.

  The control device 30 controls all the electrolysis operations in the apparatus for producing electrolyzed water. As a special control function, a function of applying a predetermined current to the electrodes 13a and 13b with a predetermined voltage is set in advance. A function of changing the voltage value and the current value based on the electrolysis conditions and a function of switching the switching valve 24 are provided. These functions are operated by a switch operation by the change-over switches 32a and 32b disposed on the operation panel 31 of the control device 30.

  In the electrolyzed water production apparatus, the electrolyzed operation selects and selects electrolyzed water according to desired characteristics of the electrolyzed water produced (electrolyzed acid water and electrolyzed alkaline water). The electrolysis conditions according to the electrolyzed water are set, and the set voltage and set current according to the electrolysis conditions are applied to the electrodes 13a and 13b. When it is desired to change the type of electrolyzed water, each of the operation switches 32a and 32b provided on the operation panel 31 of the control device 30 is selected and operated.

  In the apparatus for producing electrolyzed water, when the operation switches 32a and 32b are selectively operated, the switching valve 24 is switched to switch the electrolyzed water, and the electrolysis current applied to the electrodes 13a and 13b is changed. , Switching to a preset electrolytic current value. In the electrolysis operation based on the electrolysis conditions, electrolytically generated acidic water having substantially the same pH value as that of the electrolytically generated acidic water that is generated before the water to be electrolyzed is switched and whose effective chlorine concentration is approximated is produced. I can do it.

  In this example, electrolysis-generated acidic water produced by diaphragm membrane electrolysis in which the electrolyzed water is a dilute aqueous solution of sodium chloride, and electrolysis production produced by diaphragm membrane electrolysis in which the electrolyzed water is a dilute aqueous solution of potassium chloride An experiment was conducted to confirm the electrolysis conditions in which the pH value, which is a specific characteristic, is the same in acidic water.

  In the first experiment, a saline solution (1.71 mol / L) made up to 1 L by adding 100 g of salt to tap water and a potassium chloride solution (1.34 mol) made up to 1 L by adding 100 g of salted potassium to tap water. / L) was prepared, and each of these electrolyzed waters was subjected to diaphragm membrane electrolysis under an electrolysis condition of an electrolysis voltage of 12 V and an electrolysis current of 10 A to produce electrolysis generated acidic water and electrolysis generated alkaline water. Table 1 shows the electrolysis conditions and the characteristics of each electrolyzed water obtained.

  Next, in diaphragm membrane electrolysis using an aqueous solution of potassium chloride as the electrolyzed water, the pH value, which is one of the characteristics of the electrolyzed acidic water produced, is generated in the diaphragm using the saline solution as the electrolyzed water. A second experiment was attempted to confirm the electrolysis conditions that were the same as the pH value of the acidic water (2.61). In the second experiment, the electrolysis conditions in which the pH value of electrolyzed acidic water produced by diaphragm electrolysis using an aqueous solution of potassium chloride as the electrolyzed water is 2.61 are electrolysis conditions of an electrolysis voltage of 12V and an electrolysis current of 13A. It was confirmed that. The results are shown in Table 2.

  In the electrolyzed water production apparatus according to one embodiment of the present invention, when water to be electrolyzed using sodium chloride as an electrolysis assistant and water to be electrolyzed using potassium chloride as an electrolysis assistant are arbitrarily used, the type of electrolyzed water In response to the switching, the electrolysis current as the electrolysis condition is switched to a preset electrolysis current. For this reason, when electrolyzed water is switched, the pH value, which is a characteristic of electrolyzed acidic water generated by diaphragm electrolysis, is generated by electrolysis of diaphragm membrane electrolyzed water before switching. The pH value can be the same as the pH value of the acidic water. Further, the value of the residual chlorine concentration related to the pH value can be approximated.

It is a schematic structure figure showing roughly the manufacture device of electrolysis generation water concerning one embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Separator membrane electrolytic cell, 11 ... Tank main body, 12 ... Diaphragm, 13a, 13b ... Electrode, 14a, 14b ... Introductory line, 15a, 15b ... Outlet line, 20 ... Electrolysis water preparation mechanism, 21a, 21b ... Stock solution tank, 22 ... Tap water introduction line, 23 ... Stock solution supply line, 24 ... Switching valve, 25 ... Metering pump, 30 ... Control device, 31 ... Control panel, 32a, 32b ... Changeover switch, R1 ... Anode Side electrolysis chamber, R2... Cathode side electrolysis chamber.

Claims (5)

A method for producing electrolyzed water in which electrolyzed water is electrolyzed in a diaphragm electrolyzer to produce electrolyzed acidic water and electrolyzed alkaline water in a synchronized manner. This is a method for producing electrolyzed water that uses different electrolyzed water to produce electrolyzed water with the same characteristics, and the characteristics specified when each membrane is electrolyzed with diaphragm. A method for producing electrolyzed water, characterized in that electrolysis conditions having the same characteristics are set in advance and the electrolysis conditions are switched to the set electrolysis conditions in accordance with the selective switching of each electrolyzed water. 2. The method for producing electrolyzed water according to claim 1, wherein each of the water to be electrolyzed includes water to be electrolyzed whose main component is sodium chloride and an electrolyzer whose main component is potassium chloride. A method for producing electrolyzed water, which is water. The method for producing electrolyzed water according to claim 1 or 2, wherein the specified characteristic of the electrolyzed water is pH or residual chlorine concentration of the electrolyzed acidic water. The method for producing electrolyzed water according to any one of claims 1 to 3, wherein the preset electrolysis condition is an electrolysis current value. An electrolyzed water producing apparatus for carrying out the electrolyzed water producing method according to any one of claims 1 to 4, wherein the electrolyzed water is produced in a diaphragm membrane electrolytic cell and each electrolytic chamber of the diaphragm electrolyzed cell. An introduction pipe for introducing electrolyzed water, a pair of lead-out pipes for deriving each electrolyzed water generated in each electrolysis chamber of the diaphragm electrolyzer, and each electrolyzed water containing different electrolysis auxiliary agents Electrolyzed water comprising: electrolyzed water switching means that selectively introduces into the electrolyzed water introduction line; and electrolysis condition switching means that switches electrolysis conditions in accordance with the switching of the electrolyzed water switching means. Manufacturing equipment.

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