KR101145326B1 - Sterile water producing method and apparatus - Google Patents

Abstract

The present invention relates to a method and apparatus for preparing an aqueous hypochlorous acid solution having excellent sterilizing power using sodium chloride.
The method for producing sterilizing water of the present invention comprises: generating a hypochlorous acid solution by electrolytically dissolving an aqueous sodium chloride solution in a membrane-free electrolytic cell; And
The process of supplying the hypochlorous acid aqueous solution produced by the hypochlorous acid aqueous solution generation step to the positive electrode chamber of the diaphragm electrolyzer having a diaphragm in order to control the pH of the hypochlorous acid aqueous solution obtained by the hypochlorous acid aqueous solution generation step to the set range. It is configured to include a; pH adjustment step having.
Therefore, the apparatus for producing sterilizing water of the present invention comprises: a membrane-free electrolytic cell for generating an aqueous hypochlorous acid solution by electrolyzing an aqueous sodium chloride solution; And
It has an anode chamber and a cathode chamber separated by a diaphragm, and the hypochlorous acid solution generated in the non-diaphragm electrolyzer is introduced into the anode chamber, and the diaphragm electrolytic solution is electrolyzed to lower the pH of the hypochlorous acid solution. And a pH adjusting means having a pH meter for measuring the pH of the hypochlorous acid solution via the anode chamber of the diaphragm electrolyzer or the hypochlorous acid solution located in the anode chamber of the diaphragm electrolyzer.

Description

Sterilizing water production method and manufacturing apparatus {STERILE WATER PRODUCING METHOD AND APPARATUS}

The present invention relates to an apparatus and method for producing sterilized water used for the purpose of sterilizing various articles or air, and more particularly, to an apparatus and method for producing hypochlorous acid aqueous solution sterilized water.

Various sterilizers are used to sterilize various articles and air.

Hypochlorous acid (hypochlorous acid) solution, which is a chlorine-based sterilizing water, is widely used as a disinfectant and disinfectant for foods and food materials due to its low manufacturing cost and relatively safety.

Conventionally, hydrochloric acid was electrolyzed in the preparation of aqueous hypochlorous acid solution.

Therefore, the hypochlorous acid solution itself is safer than other fungicides, but when used in food and food materials there was a problem that requires considerable attention.

In addition, there was a problem that the hypochlorous acid aqueous solution does not show a good sterilizing power to the satisfaction.

That is, the hypochlorous acid aqueous solution is used as a disinfectant such as food or food ingredients, not because the sterilization power is satisfactory, but because it is safer and has a higher sterilization power than other disinfectants.

The present invention is to solve the above problems, more specifically, it is easy to mass-produce an excellent sterilization and safe hypochlorous acid solution using environmentally friendly material sodium chloride, the hypochlorous acid solution sterilization water is safe It is an object to provide a manufacturing method and a manufacturing apparatus.

In the present invention, an aqueous sodium chloride solution is introduced into a membrane-free electrolytic cell, followed by electrolysis to generate a large amount of hypochlorous acid solution, and the anode chamber of a diaphragm electrolyzer having an anode chamber and a cathode chamber separated by a diaphragm. By electrolyzing in the state in which it is put into a hypochlorous acid solution having a good sterilizing power, it is possible to rapidly mass-produce a safe and safe hypochlorous acid solution.

Therefore, the method for producing sterile water according to the present invention has a step of generating a hypochlorous acid solution to electrolyze an aqueous sodium chloride solution in a membrane-free electrolytic cell to produce a hypochlorous acid solution.

In addition, in order to adjust the pH of the hypochlorous acid aqueous solution obtained by the hypochlorous acid aqueous solution generation step to the set range, the hypochlorous acid aqueous solution generation step is supplied to the anode chamber of the diaphragm electrolytic cell having a diaphragm and then It has a pH adjusting step having a process of decomposition.

In the method for preparing sterilized water of the present invention, the sodium chloride aqueous solution manufacturing step of obtaining an aqueous sodium chloride solution using raw water and sodium chloride may be implemented in a form that further includes a sodium chloride aqueous solution manufacturing step, wherein the raw water is saturated while passing through a sodium chloride storage tank. It can be implemented in a form having a dilution step of preparing a dilute sodium chloride solution by having a sodium chloride aqueous solution generation step to be an aqueous solution of sodium chloride, and mixing the saturated sodium chloride aqueous solution and raw water produced by the sodium chloride aqueous solution generation step.

In addition, the pH control step measures the pH of the hypochlorous acid solution in the state mixed with the raw water through a pH meter, and adjusts the amount of current supplied to the diaphragm electrolyzer or the amount of solution supplied to the electrolyzer based on the measured data. It can be implemented in a form including a step of adjusting.

In addition, the pH adjustment step may be implemented in a form comprising a step of adjusting the pH of the hypochlorous acid solution to a predetermined value by mixing the raw water with the hypochlorous acid solution electrolyzed in the anode chamber of the diaphragm electrolyzer.

The apparatus for producing sterilizing water of the present invention has a membrane-free electrolytic cell that electrolyzes the injected sodium chloride aqueous solution to produce an aqueous hypochlorous acid solution.

In addition, a diaphragm electrolytic cell having a positive electrode chamber and a negative electrode chamber separated by a diaphragm, into which the hypochlorous acid solution generated in the diaphragm electrolyzer is introduced into the anode chamber, and electrolyzed the introduced hypochlorous acid solution to lower the pH of the hypochlorous acid solution. And a pH adjusting means having a pH meter for measuring the pH of the hypochlorous acid solution passing through the anode chamber of the diaphragm electrolyzer or the hypochlorous acid solution located in the anode chamber of the electrolytic cell.

The method for producing sterilizing water of the present invention comprises: generating a hypochlorous acid solution by electrolytically dissolving an aqueous sodium chloride solution in a membrane-free electrolytic cell; And

The process of supplying the hypochlorous acid aqueous solution produced by the hypochlorous acid aqueous solution generation step to the positive electrode chamber of the diaphragm electrolyzer having a diaphragm in order to control the pH of the hypochlorous acid aqueous solution obtained by the hypochlorous acid aqueous solution generation step to the set range. It is configured to include a; pH adjustment step having.

Therefore, by using sodium chloride which is an environmentally friendly material, it is possible to manufacture a large amount of hypochlorous acid solution with excellent sterilization power and very safe, and the production process is safe.

In addition, the sterilizing water production apparatus of the present invention has a feature that can smoothly perform the above-described sterilizing water production method.

1 is a schematic view of the sterilizing water production apparatus of the present invention
Figure 2 is a schematic diagram of the sterilizing water production apparatus of the present invention having a structure in which the aqueous sodium chloride solution circulates the membrane-free electrolytic cell and the reaction solution storage tank
3 is a sodium chloride aqueous solution circulates the membrane-free electrolytic cell and the reaction solution storage tank, and the sodium chloride aqueous solution mixed with raw water is supplied to the cathode chamber of the diaphragm electrolyzer, and mixed with the raw water when the aqueous sodium chloride solution is supplied to the anode chamber of the diaphragm electrolyzer. Schematic view of the sterilizing water production apparatus of the present invention to be supplied in a state
4 is a sodium chloride aqueous solution circulates the membrane-free electrolytic cell and the reaction solution storage tank, the sodium chloride aqueous solution is also supplied to the cathode chamber of the diaphragm electrolyzer, it is supplied mixed with raw water when the aqueous sodium chloride solution is supplied to the anode chamber of the diaphragm electrolyzer. Schematic diagram of the sterilizing water production apparatus of the present invention
5 is a sodium chloride aqueous solution circulates the membrane-free electrolytic cell and the reaction solution storage tank, the sodium chloride aqueous solution is also supplied to the cathode chamber of the diaphragm electrolyzer, electrolytic hypochlorous acid solution electrolytically to the anode chamber of the diaphragm electrolyzer from the outside of the membrane electrolyzer. Schematic diagram of the apparatus for producing sterilizing water of the present invention to be mixed with raw water
6, the aqueous sodium chloride solution circulates the membrane-free electrolytic cell and the reaction solution storage tank, an aqueous solution having sodium chloride component is also supplied to the cathode chamber of the membrane electrolyte cell, raw water is supplied to the anode chamber of the membrane electrolyte cell, and at the rear of the membrane electrolyte cell. Schematic for explaining the sterilizing water production apparatus of the present invention to be mixed with a solution (aqueous solution having hypochlorous acid component) of the reaction solution storage tank

Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.

It is to be understood, however, that the appended drawings illustrate only typical embodiments of the present invention and are not to be considered as limiting the scope of the invention.

The present invention relates to an apparatus and a method for producing sterilizing water, and has an object to enable rapid production of large amounts of hypochlorous acid solution having excellent sterilizing power by using sodium chloride solution rather than hydrochloric acid.

The sterilizing water production method of the present invention for this purpose has a step of preparing a hypochlorous acid solution through electrolysis as in the prior art.

However, in the past, hydrochloric acid was electrolyzed to prepare an aqueous hypochlorous acid solution, but in the present invention, electrolytic hydrolysis of sodium chloride solution was prepared to prepare hypochlorous acid aqueous solution so as to further improve safety.

However, simply electrolyzing an aqueous sodium chloride solution is not only difficult to obtain an aqueous solution of hypochlorous acid with excellent sterilizing power, but also difficult to mass produce.

The inventors of the present application have found that a large difference in sterilization power occurs depending on the pH of the hypochlorous acid solution obtained by electrolyzing an aqueous sodium chloride solution through various studies and experiments.

In addition, it was concluded that the pH should be between 5 and 6.5 in order for the aqueous hypochlorous acid solution to have excellent sterilizing power.

In addition, it was found that there was a significant difference in the sterilizing power according to the level of free chlorine in the hypochlorous acid aqueous solution.

However, considering the safety and sterilization power, about 30ppm is most preferable, and when the hypochlorous acid solution is pH 5 ~ 6.5, 25ppm ~ 35ppm free residual chlorine can be obtained to obtain satisfactory safety and sterilization power.

In order to enable mass production of hypochlorous acid solution having excellent safety and sterilization ability quickly, the inventor of the present application performs hypochlorous acid aqueous solution generation step of electrolyzing sodium chloride solution in the membrane-free electrolytic cell 20 to generate hypochlorous acid solution. ,

In order to adjust the pH of the hypochlorous acid solution obtained by the hypochlorous acid solution generation step to the set range, the positive electrode chamber of the diaphragm electrolyzer 31 having the diaphragm aqueous solution generation step through the diaphragm 31a has a diaphragm 31a. A method having a pH adjusting step having a process of electrolysis after feeding to 31b) was devised.

In other words, the aqueous solution of hypochlorous acid is mass-produced in a short time by introducing an aqueous sodium chloride solution into the membrane-free electrolyzer 20 and electrolyzing.

This method is by reacting an aqueous solution of sodium chloride electrolysis by the diaphragm-free electrolytic bath a pH of 8-10, and the hypochlorite ion (OCl ^-) is a method that can produce a large amount of large amount of hypochlorous acid solution.

However, the free residual chlorine (sometimes referred to as "effective amount of chlorine") of the hypochlorous acid aqueous solution produced in the above manner amounts to 4,000 ppm to 10,000 ppm.

Therefore, in order to achieve the object of the present invention, while adjusting the pH and free chlorine of the hypochlorous acid solution generated in the membrane-free electrolytic cell 20 to an appropriate level (level to ensure satisfactory disinfection power and safety), a large amount of hypochlorous acid solution quickly Must be able to handle

As a method for this purpose, the present invention proposes a method in which an aqueous hypochlorous acid solution is introduced into the anode chamber 31b of the electrolytic cell having the anode chamber 31b and the cathode chamber 31c by means of the diaphragm 31a. (If the hypochlorous acid solution is added to the cathode chamber 31c, it is difficult to achieve the object of the present invention.)

In consideration of mass production, it is preferable to provide the reaction liquid storage tank 15 so that the solution present in the reaction liquid storage tank 15 circulates the membrane-free electrolytic cell 20 and the reaction liquid storage tank 15. 2 to 6-Although the sodium chloride solution is present in the reaction solution storage tank 15 at the beginning of the manufacturing apparatus of the present invention, the sodium chloride solution circulates through the membrane-free electrolytic cell 20, and as a result, the reaction solution storage tank 15 ) Is filled with the resulting hypochlorous acid solution.)

The pH adjustment step is to measure the pH of the hypochlorous acid solution in the state mixed with the raw water through the pH meter 32, and adjust the amount of current supplied to the diaphragm electrolyzer 31 or the diaphragm electrolyzer based on the measured data. It can be implemented in the form of adjusting the supply amount of the solution supplied to (31). (Increasing the amount of current applied to the anode chamber (31b), the hypochlorous acid aqueous solution having a relatively low pH is made in the anode chamber (31b) Lowering the current produces a hypochlorous acid solution with a relatively high pH.)

Sterilizing water production apparatus of the present invention for carrying out the production method as described above, the membrane-free electrolytic cell 20 to electrolyze the added sodium chloride aqueous solution to generate a hypochlorous acid solution: and

The positive electrode chamber 31b and the negative electrode chamber 31c separated by the diaphragm 31a are provided, and the hypochlorous acid aqueous solution generated in the non-diaphragm electrolyzer 20 is introduced into the positive electrode chamber 31b, and the introduced hypochlorous acid is introduced. And a pH adjusting means 30 having a diaphragm electrolyzer 31 for lowering the pH of the hypochlorous acid aqueous solution by electrolyzing the aqueous solution.

Of course, there is also provided a pH meter 32 for measuring the pH of the hypochlorous acid solution via the anode chamber 31b of the diaphragm electrolyzer 31 or the hypochlorous acid solution located in the anode chamber 31b of the diaphragm electrolyzer. .

It is preferable to include a controller 33 for adjusting the amount of current supplied to the diaphragm electrolyzer 31 or the amount of solution supplied to the diaphragm electrolyzer 31 based on the data measured by the pH meter 32. .

The controller 33 may be implemented in the form of a central processing unit (CPU) of a computer or a controller of various electronic devices.

The construction of the non-diaphragm electrolyzer 20 or the diaphragm electrolyzer 31 and the technique of electrolyzing a liquid such as hydrochloric acid in such an electrolyzer are known in the art, so a detailed description thereof will be omitted.

In the present invention, the sodium chloride aqueous solution prepared in advance through various methods may be added to the membrane-free electrolytic cell 20, but after being produced while passing through the sodium chloride storage tank 10 as shown in the accompanying drawings, the membrane-free electrolytic cell 20 ) Can be supplied.

In this case, the sterilized water production method of the present invention has a sodium chloride aqueous solution preparation step of obtaining an aqueous sodium chloride solution using raw water and sodium chloride.

This sodium chloride aqueous solution production step, the sodium chloride aqueous solution generation step so that the raw water is sodium chloride solution while passing through the sodium chloride storage tank (10); And

It may be implemented in a form having a dilution step of preparing a dilute (preferably diluted to about 3%) aqueous sodium chloride solution by mixing the aqueous sodium chloride solution produced by the sodium chloride aqueous solution production step.

At this time, it is preferable that the raw water is saturated sodium chloride solution while passing through the sodium chloride storage tank (10).

In this case, the manufacturing apparatus of the present invention is sodium chloride is stored, the raw water is introduced and discharged, but the sodium chloride storage tank 10 is further provided so that the raw water is dissolved in the sodium chloride solution by melting sodium chloride stored in the incoming raw water. Will become a form.

In the case where the sodium chloride aqueous solution via the sodium chloride reservoir 10 is mixed with the raw water for dilution, the sodium chloride aqueous solution supply pipe 41 to which the sodium chloride aqueous solution is supplied and the raw water supply pipe 51 connected to the sodium chloride aqueous solution supply pipe 41 are provided. By doing so, the mixture with the raw water can be made in the flow of the aqueous sodium chloride solution.

Of course, the aqueous solution of sodium chloride and the raw water may be introduced into the mixing tank and mixed by an impeller or the like to be supplied to the diaphragm electrolyzer 20 after the dilution is performed.

In the present invention, the pH adjusting step is to adjust the pH of the hypochlorous acid solution to a predetermined value by mixing the raw water with the hypochlorous acid solution electrolyzed in the anode chamber 31b of the diaphragm electrolyzer 31 as shown in FIG. It can be implemented to include more.

5 is adjusted while the pH of the hypochlorous acid solution is adjusted to the set value while passing through the anode chamber 31b of the diaphragm electrolyzer 31, and the hypochlorous acid solution discharged from the anode chamber 31b is mixed with raw water once again. The pH of the hypochlorous acid solution is adjusted (finely controlled).

The manufacturing apparatus of the present invention shown in FIG. 5 has a hypochlorous acid aqueous solution supply pipe 61, one of which is connected to the anode chamber 31b of the diaphragm electrolyzer 31 and the other is connected to the raw water supply pipe 52. have.

In addition, the pH measuring device 32 is located at the rear end of the connection portion between the raw water supply pipe 52 and the hypochlorous acid aqueous solution supply pipe 61.

In the present invention, raw water may be introduced into the cathode chamber 31c of the diaphragm electrolyzer 31, or an aqueous sodium chloride solution may be added.

However, it is preferable to add the aqueous sodium chloride solution rather than only the raw water to achieve a smooth electrolysis.

The apparatus of the present invention for the input of aqueous sodium chloride solution can be implemented in various forms.

As shown in the accompanying drawings, the sodium chloride aqueous solution prepared while passing through the sodium chloride storage tank 10 may be supplied through the sodium chloride aqueous solution supply pipe 41 to be introduced into the cathode chamber 31c of the diaphragm electrolyzer 31, or in advance. A separate sodium chloride solution may be supplied.

In addition, the solution (hypochlorous acid solution) flowing into the anode chamber of the diaphragm electrolyzer may be made to be a solution only via the diaphragm electrolyzer, or may be a solution in which a mixture of raw water and a raw water is passed through the diaphragm electrolyzer. In addition, the solution may be a mixture of a raw water and an aqueous sodium chloride solution via a non-diaphragm electrolyser.

In the present invention, as shown in FIG. 6, an aqueous sodium chloride solution circulates through the membrane-free electrolytic cell 20 and the reaction solution storage tank 15, and an aqueous solution having a sodium chloride component is also supplied to the cathode chamber 31c of the membrane-electrolyte 31. Raw water is supplied to the anode chamber 31b of the diaphragm electrolyzer 31, and the solution (hypochlorite aqueous solution) which is electrolyzed while passing through the diaphragm electrolyzer 31 is a solution of the reaction solution storage tank 15 (hypochloric acid). The solution may be mixed with an aqueous solution having a component to adjust the pH. (In the accompanying drawings, the solution of the reaction liquid storage tank 15 is mixed through a pipe connected to the reaction liquid storage tank 15. )

However, when considering the ease of pH adjustment, etc., the structure of FIGS. 1 to 5 is preferable to the above structure.

In the present invention, the pH of the hypochlorous acid solution in the pH adjustment step is preferably 5 to 6.5, but the free residual chlorine is preferably located between 25 ~ 35ppm.

In the present invention, a pump for forcibly flowing the aqueous sodium chloride solution or raw water may be further provided for smooth supply of the aqueous sodium chloride solution or raw water.

At this time, the pump is preferably used a metering pump (70, 71, 72, 73, 74, 75, 76, 77,).

Reference numeral 80 denotes a flow control valve capable of controlling the supply amount of raw water, and 85 denotes an automatic valve driven by receiving an electric signal or the like.

10. Sodium Chloride Storage Tank 15. Reaction Liquid Storage Tank
20. Non-diaphragm electrolyzer 30. pH control means
31. Diaphragm electrolyzer 31a. Diaphragm
31b. Anode chamber 31c. Cathode chamber
32. pH meter 41. Sodium chloride solution supply piping
51, 52. Raw water supply piping 61. Hypochlorous acid aqueous solution supply piping
70, 71, 72, 73, 74, 75, 76. 77. Quantitative pump 80. Flow control valve
85. Automatic valve

Claims (11)

In the sterilized water production method for preparing hypochlorous acid aqueous solution sterilized water,
Hypochlorous acid aqueous solution generation step of electrolytically dissolving an aqueous sodium chloride solution in the membrane-free electrolyzer 20 to produce hypochlorous acid solution; And
In order to adjust the pH of the hypochlorous acid solution obtained by the hypochlorous acid solution generation step to the set range, the positive electrode chamber of the diaphragm electrolyzer 31 having the diaphragm aqueous solution generation step through the diaphragm 31a has a diaphragm 31a. 31b) is supplied, but mixed with raw water and supplied in a diluted state, the pH adjustment step having a process for electrolysis; configured, including, sterile water production method.
The method of claim 1,
Sodium chloride solution production step further comprises the step of obtaining an aqueous sodium chloride solution using the raw water and sodium chloride, the sodium chloride solution production step is a sodium chloride aqueous solution generation step so that the raw water is saturated sodium chloride solution via the sodium chloride storage tank (10);
Method for producing a sterilized water, characterized in that consisting of; dilution step of preparing a diluted sodium chloride solution by mixing the aqueous saturated sodium chloride solution and the raw water produced by the sodium chloride aqueous solution production step.
3. The method according to claim 1 or 2,
The pH adjustment step is to measure the pH of the hypochlorous acid solution in the state mixed with the raw water through the pH meter 32, and adjust the amount of current supplied to the diaphragm electrolyzer 31 or the diaphragm electrolyzer based on the measured data. A method for producing sterile water, characterized in that it comprises a step of adjusting the supply amount of the solution supplied to (31).
delete In the sterilized water production method for preparing hypochlorous acid aqueous solution sterilized water,
Hypochlorous acid aqueous solution generation step of electrolytically dissolving an aqueous sodium chloride solution in the membrane-free electrolyzer 20 to produce hypochlorous acid solution; And
Raw water is supplied to the anode chamber 31b of the diaphragm electrolyzer 31, and the hypochlorous acid produced through the hypochlorous acid aqueous solution generation step is electrolyzed solution via the anode chamber 31b of the diaphragm electrolyzer 31. Sterilized water production method comprising a; adjusting the pH to be adjusted to the set range by mixing with an aqueous solution.
The method according to any one of claims 1, 2, and 5,
A method for producing sterilized water, characterized in that an aqueous solution having a sodium chloride component is supplied to the cathode chamber (31c) of the diaphragm electrolyzer (31).
In the sterilizing water production apparatus for producing hypochlorous acid aqueous solution sterilizing water,
A diaphragm electrolyzer 20 for electrolyzing the injected sodium chloride solution to produce an aqueous hypochlorous acid solution; And
Raw water is supplied to the anode chamber 31b of the electrolyte membrane electrolytic cell 31 including the anode chamber 31b and the cathode chamber 31c separated by the diaphragm 31a, and the anode of the membrane electrolyte 31 A pH adjusting means (30) for mixing the electrolytic solution via the seal (31b) with the hypochlorous acid solution generated through the diaphragm electrolyzer (20) to adjust the pH to a set range. Sterilizing water manufacturing equipment.
In the sterilizing water production apparatus for producing hypochlorous acid aqueous solution sterilizing water,
A diaphragm electrolyzer 20 for electrolyzing the injected sodium chloride solution to produce an aqueous hypochlorous acid solution; And
A positive electrode chamber 31b and a negative electrode chamber 31c separated by the diaphragm 31a are provided, and the hypochlorous acid aqueous solution generated in the non-diaphragm electrolyzer 20 is introduced into the positive electrode chamber 31b. It is mixed and diluted, and has a diaphragm electrolyzer 31 which lowers the pH of the hypochlorous acid solution by electrolyzing the injected hypochlorous acid solution, and via the anode chamber 31b of the diaphragm electrolyzer 31. And a pH adjusting means (30) having a pH measuring device (32) for measuring the pH of the hypochlorous acid solution or the hypochlorous acid solution located in the anode chamber (31b) of the diaphragm electrolyzer (31). Device.
The method of claim 8,
Sodium chloride is stored, and the raw water is to be introduced and discharged, but the sodium chloride storage tank 10 is further provided so that the raw water is dissolved in the sodium chloride solution by melting sodium chloride stored in the introduced raw water, sterilization, Number manufacturing equipment.
The method of claim 8,
A controller 33 for adjusting the amount of current supplied to the diaphragm electrolyzer 31 or adjusting the amount of solution supplied to the diaphragm electrolyzer 31 based on the data measured by the pH meter 32; Characterized in that the sterilized water production apparatus.
The method of claim 8,
A sodium chloride aqueous solution is introduced into the cathode chamber (31c) of the diaphragm electrolyzer (31), sterilizing water production apparatus.

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