JP2003340451A - Electrolytic alkali cleaning water, method for generating electrolytic alkali cleaning water and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an electrolytic alkali cleaning water which is safe and has high cleaning power by controlling the production conditions to be proper for cleaning water based on various kinds of production conditions and results of cleaning tests and by controlling the pH to a specified alkali value. <P>SOLUTION: The electrolytic alkali produced water to be used as cleaning water is produced so as to have 10 to 12.5 pH and 0.3 to 1.85 mg/l concentration of dissolved hydrogen. The product of the current density flowing between both electrodes of an electrolytic cell during electrolysis and the residential time of raw water in a tank is controlled to 1.3 to 40 secA/dm<SP>2</SP>. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general cleaning field including machines, metals and electronics, and in particular, electrolytic alkaline cleaning water suitable for industrial part cleaning and food processing industry, and the production of this electrolytic alkaline cleaning water. Method and apparatus.

[0002]

2. Description of the Related Art In the fields of machines, metals, and electronics, there are various cleaning processes in each production process. For example, the use of organic chlorine compounds (volatile organic compounds) such as CFCs and ethane is prohibited by law. There has been a demand for the development of an alternative cleaning agent that is limited and that can obtain high cleanliness in a short time and that is safe for living things and the environment.

Hydrocarbon detergents that have appeared in place of the above-mentioned organic chlorine compounds are one of the alternative detergents, but they have problems in terms of flammability and working environment. Further, in recent years, water-based cleaning using a surfactant has also attracted attention, and industrial detergents suitable for the intended use are commercially available and are being put into practical use. However, since water-based cleaning uses a chemical such as a surfactant in order to improve the cleaning effect, a rinse step of washing out the surfactant is required, and a large amount of rinse water is required. In addition, since the surfactant is an organic substance, BOD. There is a problem that it corresponds to COD and requires a large-scale wastewater treatment facility to meet the wastewater standards.

On the other hand, it is conceivable to use alkali-generated water produced by electrolyzing water as washing water, and it has already been disclosed in JP-A-7-73409, JP-A-7-166197, and JP-A-9-166197. -137287,
Also, some applications have been filed as seen in Japanese Patent Application Laid-Open No. 10-192860, but in the inventions described in these applications, the criteria of the detergency are pH, ORP,
The detergency was judged only by the numerical value such as surface tension, and the correlation between the detergency and electrolysis was ambiguous.

Therefore, the applicant of the present invention has filed a patent application 20 previously filed.
In 01-168956, it was assumed that the main factor of cleaning was the alkali concentration (sodium hydroxide concentration), and the efficient electrolysis conditions were defined in consideration of the generation principle.
In addition, in order to prevent the deterioration of the cleaning effect due to the mixing of the acidic substance (acidic electrolyzed water) generated at the counter electrode by the simultaneous measurement of the alkali ratio, the conditions of the structure and operation of the electrolytic cell were also specified.

[0006]

However, in various cleaning evaluation tests carried out later, for example, as shown in the cleaning rate test 1 of (Data 1) shown in FIG. 2, alkaline electrolyzed water has the same concentration. It was found that, compared with sodium oxide, a clearly superior cleaning result was obtained.

It is clear that the method for producing sodium hydroxide in industrial electrolysis and the method for producing electrolyzed water are very similar,
Further, as shown in each data (2-1, 2-2, 2-3, 2-4) of the storage stability test shown in FIGS. 7, 8, 9 and 10, the alkaline electrolyzed water and the water were used. Considering the present situation where the difference with sodium oxide cannot be found, it is natural to think that sodium hydroxide is generated in the alkaline electrolyzed water.

From the above-mentioned cleaning test, the difference in the cleaning effect between the alkaline electrolyzed water and the sodium hydroxide solution is clear, and other cleaning factors which cannot be explained only by the alkali concentration (sodium hydroxide concentration) are the same. If it exists, the possibility is extremely high. Under such circumstances, it has been considered desirable to generate alkaline electrolyzed water having a high cleaning effect by efficiently generating an unseen cleaning factor and controlling it at an appropriate value.

On the other hand, regarding the relationship between hydrogen and cleaning, the relationship is beginning to be suggested as announced by some academic societies.
For example, Japanese Patent Application Laid-Open No. 11-77023 describes that it is possible to efficiently dissolve hydrogen gas by degassing ultrapure water, and a dissolved hydrogen amount of 0.7 mg / l or more is used for cleaning. Is said to be appropriate. Further, in the above invention, it is said that an aqueous solution in which hydrogen is dissolved in ultrapure water is used for wet cleaning of electronic materials such as silicon substrates for semiconductors.

Generally, in the wet cleaning of electronic materials, it is necessary to control the cleanliness of an object to be cleaned extremely strictly,
In many cases, ultrapure water is used. However, since the electric conductivity of pure water is almost 0, it is difficult to perform electrolysis.
Therefore, in semiconductor-related cleaning, there are many cases in which a method of dissolving a required gas into a solution prepared in advance by an apparatus such as a gas permeable membrane is adopted as in the above patent contents. However, as described in JP-A No. 11-77023, a device for generating hydrogen gas, a cylinder of hydrogen gas, or the like must be prepared separately, and a degassing step is required for melting. Need. There is also a description that when dissolved without being degassed, the hydrogen solubility of 0.6 mg / l is the limit.

Part cleaning in industrial cleaning not limited to electromagnetic parts covers a wide range of genres.
Welding and cutting processes are adjacent to the cleaning process when cleaning metalworked parts, and it is extremely dangerous to easily install a hydrogen cylinder. Further, the results of various cleaning tests have shown that even if only hydrogen is dissolved in some contaminants, the expected results cannot be obtained, and it is necessary to adjust the pH to alkali. This is because pollutants are more diverse in general industrial part cleaning than electronic materials. For example, fats and mineral oils require the alkali saponification action and dispersion ability of alkaline substances (sodium hydroxide, etc.) at the same time. It is thought that the reason is.

In such a general industrial cleaning field, the method of dissolving hydrogen in a cylinder or the like requires an additive such as sodium hydroxide in order to make the pH alkaline, and as a result, it is very complicated. As a result, the cost is increased. Further, regarding electrolyzed water, it is the actual situation that it is completely unknown what kind of electrolysis conditions and how much hydrogen can be dissolved.

As a result of investigations and studies to solve each of the above problems, it was concluded that hydrogen generated by electrolysis contributes to the cleaning effect, and at the same time, it is desirable that the aqueous solution be alkaline. I arrived. Therefore, the technical object of the present invention is to provide appropriate generation conditions as cleaning water based on various generation conditions and cleaning test results,
An object of the present invention is to provide electrolytic alkaline cleaning water that is safe and has high cleaning power by adjusting the pH to a predetermined alkaline value.

[0014]

In order to solve the above technical problems, in the present invention, tap water or pure water is used as raw water, and an electrolyte containing a sodium compound or a potassium compound as a main component is added, or , Without adding an electrolyte as necessary, the raw water is made to flow into the electrolytic cell with a diaphragm between the positive and negative electrodes (the diaphragm electrolytic cell) and electrolyzed in the diaphragm electrolytic cell to generate from the cathode side. The generated alkaline water is used as washing water. The dissolved hydrogen concentration of the generated alkaline water is 0.3 to 1.85 mg / l, and the pH is 10 to 10.
It is characterized by being in the range of 12.5. Further, the product value of residence time × current density required for electrolysis is 1.3 to 40
secA / dm2.

According to the above-mentioned means, by adding a small amount of electrolyte to tap water or pure water, it is possible to achieve a concentration of dissolved hydrogen close to saturation without degassing, and to adjust the pH to a predetermined alkali. By doing so, it becomes possible to generate safe and highly effective cleaning water.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION <Relationship between Dissolved Hydrogen and Detergency> Three kinds of pollutants are animal oil / fat, particle dirt, and mineral oil. As shown in (Data 1) of FIG. The proper cleaning method was selected. Further, in (Data 3) shown in FIG. 11, cleaning comparison of an aqueous solution in which hydrogen is dissolved in sodium hydroxide and electrolyzed water was performed. As you can see from this result, there is a difference in the cleaning result depending on the presence or absence of dissolved hydrogen,
It can be determined that hydrogen contributes to cleaning. The test method of detergency is as follows. (1) Cleaning test method for animal fats and oils A model soil was prepared by the same method as described in JIS K3362 (1998), and the amount α of soil adhered to the model soil pieces before washing and the model after washing. The cleaning rate X of each cleaning power determination aqueous solution was determined from the difference from the amount β of dirt attached to the dirt pieces. (2) Particle dirt cleaning evaluation method Kaolin, which is a dirt stain, was attached to a slide glass,
The dried product was used as a model stain piece, washed with an ultrasonic cleaning device, and then measured with an optical sensor manufactured by an original method. (3) Mineral oil cleaning evaluation method After applying mineral oil to the metal parts and performing ultrasonic cleaning, n
-Ultrasonic extraction with hexane and reduced solubility with an evaporator,
It was heated to dryness and weighed. As a device used for measuring dissolved hydrogen, a diaphragm-type polarographic dissolved hydrogen meter was used.

<Relationship between the amount of hydrogen, pH and contaminants> In order to wash animal and vegetable oils and fats and mineral oils with an aqueous detergent, it is necessary to solubilize the oil in water and remove it from the article to be washed. . Generally, a surfactant and an alkali builder are often used, and an alkaline aqueous solution has an effect of saponifying, emulsifying and dispersing oil, and is effective for washing oils and fats. It is said that many particle stains have a negative zeta potential in an alkaline aqueous solution, and a cleaning effect is obtained by a repulsive action with an object to be cleaned which also has a negative potential. Therefore, even if a large amount of hydrogen is dissolved, it is considered that the cleaning effect is small if the pH is neutral, and the cleaning effect becomes higher as the alkali becomes. Therefore, as shown in FIG. 12, a typical zeta potential of particle contamination (data 4)
It was found that the negative value of the zeta potential of the particles increased as the pH became alkaline, and the particles easily peeled off due to the repulsive action with the object to be cleaned.

A laser / rotary prism type zeta potential measuring instrument was used for measuring the zeta potential. In order to utilize this mechanism for cleaning, it is necessary to make the aqueous solution alkaline. The data (data 1-1) shown in FIG. 3 is a table showing the relationship between the pH and the cleaning rate, and the data (data 1-2) shown in FIG.
Is a graph showing the relationship between pH and cleaning rate, FIG. 5 (Data 1-3) is a graph showing the relationship between [OH-] concentration and cleaning rate, and FIG. 6 is shown (Data 1-4). Is a graph showing the relationship between pH and [OH-] concentration. pH 10
If less than, the cleaning rate is poor. The reason for this is that the [OH-] concentration contributing to cleaning is p as shown in the graph of pH and [OH-] concentration in (Data 1-4) above.
It is considered that when it is less than H10, it is extremely small. From these results, a comprehensive judgment was made that a pH of 10 or higher is desirable. In addition, pH1 which is the upper limit of pH
2.5 is the dissolved hydrogen and p of (data 8) shown in FIG.
On the basis of the relationship of H, the saturated value was set as the upper limit value.

<Dissolved Hydrogen Amount, Current Density and Residence Time in Electrolyzer> In electrolysis, the property of water is often regulated by the current density. As can be seen from (Data 5-1) shown in FIG. 13, it can be seen that the dissolved hydrogen increases as the current density increases. ● in the graph
■ ▲ ◆ shows different residence times in the electrolyzer used. From this result, it was found that increasing the current density is important for increasing the amount of dissolved hydrogen, but the required amount of hydrogen cannot be controlled by itself.

Therefore, the graph is recreated based on the concept of residence time × current density as shown in FIG. 14 (data 5-
2). As can be seen from this graph, it was found that the data for each residence time converged. From this result, it can be said that the residence time and the current density in the electrolytic cell are important for properly controlling the amount of dissolved hydrogen. The data is summarized in FIG. 15 (data 5-3) in consideration of the measurement of the amount of dissolved hydrogen and other measurement errors. The relationship between the detergency and the dissolved hydrogen was as shown in (Data 6) shown in FIG. 16, and it was found that the cleaning rate drastically changed around 0.3 mg / l. As a result, the lower limit of the dissolved hydrogen amount was It was found that 0.3 mg / l is desirable.
In order to obtain a dissolved hydrogen concentration of 0.3 mg / l, according to (Data 5-3) shown in FIG. 15, it is necessary to set the residence time × current density to 1.3 secA / dm 2.

Further, it is well known that the amount of dissolved hydrogen has a saturation point from a chemical manual or the like, as shown in the graph of (Data 7) shown in FIG. 17, and does not increase infinitely. Therefore, it is necessary to set the time point at which the saturation point is reached as (residence time) × (current density upper limit). Similarly, considering the saturation point of the hydrogen amount from (Data 5-3) shown in FIG.
It can be considered to be around 0 secA / dm2.
The measurement time is summer, and the water temperature at that time is 1.5 mg.
The saturation point was determined to be around / l.

<Regarding the Configuration of the Apparatus> Next, the alkaline cleaning water producing apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating the entire apparatus of the present invention,
In the figure, 1 is a diaphragm electrolyzer (hereinafter simply referred to as electrolyzer),
1T is a diaphragm that partitions the interior of the electrolytic cell 1 into two chambers, an anode chamber 1A and a cathode chamber 1B. The diaphragm 1T has an electrical resistance of, for example, 0.01 to 0.0001 Ωcm 2, and an average pore diameter of 0.2 to
It is configured to be 3.5 μm.

Reference numeral 3 is a water supply pipe for supplying raw water obtained by adding a graded material such as a sodium compound or a potassium compound to tap water or pure water to the above-mentioned electrolytic cell 1 and 3A and 3B are the water supply pipes 3 The water inlets (water inlet pipes) of the anode chamber 1A and the cathode chamber 1B that communicate with each other are shown.

5 is an electrolyte tank containing the above-mentioned electrolyte, 6 is a pump for supplying the electrolyte, and this pump 6 is operated by a check valve (shown in the figure) for a necessary amount of electrolyte according to a command from a control board 10 storing a control program. By adding to the tap water or pure water through an addition pipe 6P provided with (omitted), the electric conductivity is, for example, 20 to 500 mS /
The raw water is adjusted to have a volume of m and is supplied to the electrolytic cell 1.

Further, 4A and 4B are the above-mentioned respective anode chambers 1A.
And a water outlet (water outlet pipe) connected to the extraction side of the cathode chamber 1B, and in the middle of the path of each of these water outlets 4A and 4B, a flow rate sensor and a water amount adjusting valve (controllable by the control board 10). Both are not shown). Reference numerals 12 and 13 denote a flow rate detecting sensor and a water amount adjusting valve provided in the water supply pipe 3, and these sensors 12 and the adjusting valve 13 are also connected to the control board 10 to control the supply amount of tap water or pure water. It is configured to be adjustable.

Reference numeral 9 is a power supply substrate for the electrodes 2A and 2B provided inside the anode chamber 1A and the cathode chamber 1B, and 7 and 8 are current sensors and currents connected between the electrodes 2A and 2B and the power supply substrate 9. The power supply board 9 is a variable circuit and is connected to the control board 10 described above so that the current supplied to the electrodes 2A and 2B can be adjusted.

Reference numeral 11 denotes an operation board of the control board 10 having a hydrogen concentration adjusting switch, and the control board 10 stores programs for executing the respective means described in claim 6.

That is, on the control board 10, the flow rate of raw water detected by the flow rate detection sensor 12 per unit time, and
Residence time in the electrolytic cell calculated from the volume of the electrolytic cell 1,
A product value calculating means for calculating a product value of the current value flowing between the electrodes 2A and 2B detected by the current sensor 7 and the current density calculated from the electrode area, and a product of the residence time and the current density. The value is 1.3 to 40 secA / dm2 and the pH of the electrolyzed alkaline water generated in the cathode chamber 1B is
So as to fall within the range of 10 to 12.5 by controlling the current variable circuit 8 and the water amount control valve 13 so that both electrodes 2A, 2
A program for executing a control means for controlling either or both of the current value between B and the raw water flow rate is stored.

The product value of the residence time and the current density is
Within the range of 1.3 to 40 secA / dm @ 2 described above, the operation board 11 can be arbitrarily adjusted.

<Regarding operation of the apparatus> Normally, the electrolytic cell 1
In many cases, the volume of the electrolysis tank and the area of the electrodes 2A and 2B are universal in the actual operation device.
The area of is input in the calculation formula in advance. In addition, the specifications of the electrolytic cell 1 may be changed depending on the operation of the apparatus, and in that case, it is necessary to change the calculation formula automatically or manually.

First, the control method with the current fixed will be described. In order to control the dissolved hydrogen concentration in a state where the current value is fixed (constant current power source, etc.), the current density obtained from the current value obtained from the current sensor 7 and the areas of the electrode plates 2A and 2B that are input in advance are calculated. After calculating the amount of water per unit time obtained by the flow rate detection sensor 12 and the residence time in the electrolytic cell from the volume of the electrolytic cell 1 which is also input in advance, the calculated dissolved hydrogen concentration and the required dissolved hydrogen concentration are calculated. An appropriate residence time is determined from the obtained current density, and the water amount control valve 13 is opened / closed to control the residence time in the electrolytic cell 1. The control by the water amount control valve 13 is effective in obtaining a wide range of dissolved hydrogen concentration within a power source capacity limited due to cost and the like.

Next, a control method when the amount of water produced is fixed will be described. In order to control the dissolved hydrogen concentration in a state where the amount of water is fixed, the electrolytic cell residence time is calculated from the amount of water obtained from the flow rate detection sensor 12 and the volume of the electrolytic cell 1 that has been input in advance, and is also input in advance. After calculating the current density from the area of the electrodes 2A and 2B, the appropriate current density is determined from the required dissolved hydrogen concentration and the electrolytic cell residence time obtained by the calculation, and the current variable circuit 8 controls the electrolytic current. I do. The control by the current variable circuit 8 is preferably performed when the current capacity has a margin. Further, in the control by the water amount control valve 13, there is a difference in the amount of produced water between a low dissolved hydrogen concentration and a high dissolved hydrogen concentration, but since this phenomenon does not exist in the variable current formula, a method for making the produced water amount constant Is effective as

It is also possible to combine the above two methods to control both the current and the water amount. In this case, an intermediate property between the two methods is exhibited.

Further, the pump 6 used for adding the above electrolyte
It is necessary to add an appropriate amount of the discharge amount in order to obtain the current value required under each condition. It is desirable to control the amount of addition to be increased based on the electrolytic current value obtained from the current sensor 7 if it does not reach the specified current. Therefore, if the specified current value is reached without adding an electrolyte depending on the electric conductivity of the raw water, it is not necessary to add it.

[0035]

As described above, according to the electrolytic alkaline cleaning water, the method for producing electrolytic alkaline cleaning water, and the apparatus therefor according to the present invention, the pH of electrolytic alkaline generating water used as cleaning water is 10 to 12.5. And the generated hydrogen concentration is 0.3 to 1.85 mg / l, and the product of the current density between both electrodes required for electrolysis and the residence time of raw water in the tank required for electrolysis. Value is 1.3-40se
Since it is set to be cA / dm2 to generate electrolyzed water, it is possible to generate electrolyzed alkali-generated water having a high pH value, and at the same time, dissolved hydrogen is generated on the cathode side, and alkali water (OH- It contributes to cleaning) and dissolved hydrogen to provide cleaning water that can exhibit an excellent cleaning effect.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram illustrating a configuration of a device for generating electrolytic alkaline cleaning water according to the present invention.

FIG. 2 is a table of data (data 1) showing a cleaning rate when a proper cleaning method is selected for each contaminant.

FIG. 3 is a table showing the cleaning rate according to the difference in pH (Data 1
It is a table figure of -1).

FIG. 4 is a graph of (data 1-2) in which the table shown in FIG. 3 is represented by a line.

FIG. 5 is a graph of (Data 1-3) showing the relationship between the [OH −] concentration and the cleaning rate for each contaminant.

FIG. 6 is a graph showing the relationship between pH and [OH-] concentration (Data 1-4).

FIG. 7 is a graph of (Data 2-1) showing the results of the storage stability test.

FIG. 8 shows the results of another storage stability test (Data 2-
It is a graph of 2).

FIG. 9 shows the results of another storage stability test (Data 2-
It is a graph of 3).

FIG. 10 shows the results of another storage stability test (Data 2-
It is a graph of 4).

FIG. 11 is a table of (Data 3) showing the relationship between dissolved hydrogen and the cleaning rate.

FIG. 12 is a graph of (Data 4) showing measured values of zeta potential.

FIG. 13 is a graph of (Data 5-1) showing the relationship between current density and dissolved hydrogen.

FIG. 14 is a graph (Data 5-2) illustrating the relationship between residence time before data processing × current density and dissolved hydrogen.

FIG. 15 is a graph (Data 5-3) illustrating the relationship between residence time after data processing × current density and dissolved hydrogen.

FIG. 16 is a graph of (Data 6) showing the relationship between the amount of dissolved hydrogen and the cleaning rate.

FIG. 17 is a graph of (Data 7) showing the relationship between the saturated solubility of hydrogen in water.

FIG. 18 shows the relationship between dissolved hydrogen and pH (Data 8).
Is a graph of.

[Explanation of symbols]

1 diaphragm electrolyzer 1T diaphragm 1A Anode chamber 1B cathode chamber 2A, 2B electrodes 3 water supply pipe 5 Electrolyte tank 6 Electrolyte supply pump 7 Current sensor 8 current variable circuit 9 Power board 10 Control board 11 Operation board 12 Flow rate sensor 13 Water flow control valve

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ayako Morishita             1-6-2 Shintoda, Hamamatsu City, Shizuoka Prefecture Amano             Eco Technology Co., Ltd. Miyakoda Engineering             Inside the ring F-term (reference) 4D061 DA03 DB08 EA02 EB01 EB04                       EB12 EB37 EB39 ED12 GA02                       GA12 GA20 GC02 GC12 GC18

Claims (7)

[Claims] 1. An electrolytic alkaline cleaning water in which raw water is introduced into an electrolytic cell having a partition wall between positive and negative electrodes and electrolyzed so that alkaline generated water generated on the cathode side is used as cleaning water. The electrolyzed alkaline cleaning water having a pH of 10 to 12.5 and a dissolved hydrogen concentration of 0.3 to 1.85 mg / l. 2. Tap water or pure water is used as raw water, and this raw water is caused to flow into a diaphragm electrolytic cell having a partition between positive and negative electrodes for electrolysis to wash alkali-generated water produced on the cathode side. A method for producing electrolyzed alkaline washing water used as water, wherein the conditions for production by the diaphragm electrolyzer are as follows: pH of alkali produced water is 10 to 12.5, and dissolved hydrogen concentration is 0.3 to 1 A method for producing electrolytic alkaline cleaning water, wherein the method is set to 0.85 mg / l. 3. The product obtained by multiplying the current density of the current flowing between both electrodes of the diaphragm electrolysis cell by the residence time in the cell during electrolysis of the raw water is 1.3 to 40 secA / dm2. The method for producing electrolytic alkaline cleaning water according to claim 2, wherein the method is set. 4. The electrolytic alkali according to claim 2 or 3, wherein an electrolyte containing a sodium compound or a potassium compound as a main component is added to the raw water that flows into the diaphragm electrolyzer as necessary. How to generate wash water. 5. Electrolytic alkali cleaning in which raw water is introduced into a membrane electrolyzer having a partition wall between positive and negative electrodes for electrolysis, and the alkali-generated water generated between the cathodes is used as cleaning water. A device for producing water, which is a current detection unit that detects a current flowing between both electrodes, a flow rate detection unit that detects a flow rate of raw water per unit time, an automatic water amount control valve that adjusts the amount of raw water, and the unit time described above. The product value of the residence time and the current value, which is calculated by multiplying the residence time in the electrolytic cell calculated from the contact flow rate and the electrolytic cell volume, and the product of the current value flowing between both electrodes and the current density calculated from the electrode area. A calculating means is provided, and the current value between the electrodes or one or both of the raw water flow rate is controlled so that the product value of the residence time and the current density becomes a predetermined value. Electrolytic Al characterized by Generating device of re-washing water. 6. The product obtained by multiplying the residence time by the current value is 1.
3 to 40 secA / dm2, the pH value of the generated alkaline water is 10 to 12.5, and the dissolved hydrogen concentration is 0.3 to 1.85 mg / l. Or, it is configured to control either or both of the raw water flow rates.
The apparatus for producing electrolytic alkaline cleaning water according to 1. 7. The electrolytic alkaline cleaning water according to claim 5 or 6, further comprising selection means for selecting an arbitrary product value obtained by multiplying the residence time by the current value. Generator.