KR20200079624A - Apparatus for manufacturing of weak-acidic hypochlorous acid water - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing weak-acidic hypochlorous acid water to acquire a high concentration weak-acidic hypochlorous acid water with a high effective chlorine concentration through a simple configuration. According to the present invention, the apparatus comprises: a raw material tank storing and supplying 2 to 6% of diluted hydrochloric acid; a raw water supplier supplying raw water; a first mixer connected to the raw material tank through a raw material supply pipe and connected to the raw water supplier through a first raw water supply pipe to mix and stir the supplied hydrochloric acid and raw water to manufacture salt water; and an electrolysis tank, which is a non-partition electrolysis tank, receiving the salt water from the first mixer through a mixed water supply pipe to manufacture an electrolytic oxidative solution through electrolysis.

Description

{APARATUS FOR MANUFACTURING OF WEAK-ACIDIC HYPOCHLOROUS ACID WATER}

The present invention relates to an apparatus for producing acidic hypochlorous acid, and more particularly, to an apparatus for producing acidic hypochlorous acid water to obtain a high concentration of acidic hypochlorous acid water having a high effective chlorine concentration through a simple configuration.

The hypochlorous acid solution is harmless to the human body and has excellent sterilizing power, and one of the methods for preparing such hypochlorous acid is an electrolysis in an electrolytic cell by adding an electrolyte to water.

In particular, in the food additive manufacturing standards and standards established by the Food and Drug Administration, strong acid hypochlorous acid solutions (0.2% or less aqueous sodium chloride solution obtained from the anode side of the diaphragm electrolyzer composed of positive and negative electrodes separated by a diaphragm) and slightly acidic hypochlorous acid There is a solution (an aqueous solution obtained by charging 2 to 6% hydrochloric acid in a diaphragm electrolytic cell).

In the method using the diaphragm electrolytic cell, dilute hydrochloric acid of 2 to 6% hydrochloric acid is introduced into the diaphragm electrolytic cell and electrolyzed, followed by dilution with a large amount of water (groundwater or tap water) to obtain an acidic hypochlorous acid solution.

The relevant chemical formula for obtaining such an acidic hypochlorous acid solution is as follows.

Anodic reaction

^{2HCl → 2H + + 2Cl -,} 2Cl - → Cl 2 + 2e -

2Cl ₂ + H ₂ O → HOCl + HCl

Cathodic reaction

^{HCl → H + + Cl -,} 2H + + 2e - → H 2

Mixed reaction

2HCl + H ₂ O → HOCl + HCl + H ₂

However, in the production of such an acidic hypochlorous acid solution using a diaphragm electrolyzer, a large amount of unelectrolyzed hydrochloric acid is entrained and combined with the hydrochloric acid generated by the anodic reaction of the electrolytic cell, thereby rapidly dropping the pH of the hypochlorous acid solution, resulting in minor acidity. In order to maintain the region, a large amount of dilution is inevitable, and thus it is very difficult to produce a high concentration of the acidic hypochlorous acid solution (pH 5.0-6.5, 30-200 ppm).

As mentioned above, the hypo-acidic hypochlorous acid solution is required to be prepared for sterilization of food ingredients and food, but it is a micro-acidic hypochlorous acid solution having a pH of 5.0 to 6.5 and an effective chlorine concentration in the range of 30 to 200 ppm for sterilization of food equipment. A device capable of obtaining is required.

That is, where a hypochlorous acid solution manufacturing apparatus is normally used, an appropriate hypochlorous acid solution is obtained by using a sodium hypochlorite generator as shown in Korean Patent Registration Nos. 10-0736155 and 10-1390651. .

However, in food-related businesses, there is a need for a device capable of producing a high concentration of an acidic hypochlorous acid solution that can be used for sterilization of food equipment in addition to food ingredients and food sterilization.

Therefore, as a conventional device for preparing a hypochlorous acid solution for food ingredients and food sterilization, a high concentration of hypochlorous acid solution cannot be obtained, so a separate high concentration of hypochlorous acid solution must be provided. This increases the cost of facilities.

The object of the present invention is to obtain a high concentration of highly acidic, highly acidic hypochlorous acid water with a high effective chlorine concentration through a simple configuration without increasing the facility, but is effective from dilute hydrochloric acid of 2-6% hydrochloric acid by electrolysis using a diaphragm electrolyzer. The present invention is to provide an apparatus for preparing a solution of a hypochlorous acid solution of acidity to obtain a high concentration of an acidic hypochlorous acid solution having a chlorine concentration in the range of 30 to 200 ppm and use it for food raw materials and food sterilization.

An apparatus for producing acetic acid hypochlorous acid according to an embodiment of the present invention for achieving the above object, a raw material tank for storing and supplying 2 to 6% diluted hydrochloric acid; A raw water supplier that supplies raw water; A mixer that is connected to the raw material tank and a raw material supply conduit and is connected to the raw water supply unit and a first raw water supply conduit to stir and mix the supplied hydrochloric acid and raw water using a first stirrer to produce brine; And an electrolysis tank for supplying the brine through the mixture supply conduit from the first mixer to produce an electrolytic oxidizing solution through electrolysis.

According to an embodiment of the present invention, after receiving the electrolytic oxidant from the electrolysis tank and measuring the concentration through a concentration meter, if it is higher than the value of the acidic hypochlorous acid, raw water from the second raw water supply conduit of the raw water supply It is further supplied by agitating and diluting using a second stirrer to further include a diluent for producing acidic hypochlorous acid water.

According to an embodiment of the present invention, the cathode of the electrolysis tank is characterized by being coated with a hydrophobic film of polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) or polypropylene (PP).

According to an embodiment of the present invention, it is possible to manufacture and use an apparatus for manufacturing a high concentration of a low-acidic hypochlorous acid solution for food raw materials and food sterilization with a simple configuration without increasing the facility cost.

1 is a schematic view showing a device for producing acidic hypochlorous acid according to an embodiment of the present invention.
Figure 2 is a schematic view showing an acidic hypochlorous acid production apparatus according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the apparatus for producing a non-acidic hypochlorous acid according to the present invention will be described in detail.

Figure 1 is a schematic view showing a device for producing acidic hypochlorous acid according to an embodiment of the present invention, Figure 2 is a schematic view showing a device for producing acidic hypochlorous acid according to another embodiment of the present invention.

First, it should be noted that, among the drawings, the same components or parts are denoted by the same reference numerals as possible. In addition, in describing the present invention, detailed descriptions of related known functions or configurations will be omitted so as not to obscure the subject matter of the present invention.

Hypochlorous acid is a non-acidic hypochlorous acid, hypochlorous acid and the strong acid sodium hypochlorite, HOCl, OCl out of these ^- are mainly used for sterilization with a disinfectant.

In particular, the acidic hypochlorous acid has a pH of about 5 to 6 and has the advantage of having a peculiar odor, and is also used for food ingredients and food sterilization because it is not toxic to the human body.

In the prior art, the acidic hypochlorous acid solution having a pH of 5 to 6.5 and 10 to 30 ppm produced as a final product can be used only for sterilization of food ingredients or food.

Here, if the amount of chlorine is increased to increase the concentration to 30~200ppm in order to use the concentration of the above-mentioned acidic hypochlorous acid solution for sterilization of food utensils, the pH decreases (by hydrochloric acid not dissociated in the electrolytic bath). ), and in order to increase the pH in the range of 5 to 6.5, a large amount of water must be added again, which again results in a lower effective chlorine concentration.

Therefore, through a simple configuration without increasing the cost of the facility, the acidic hypochlorous acid according to an embodiment of the present invention to obtain a high concentration of highly acidic hypochlorous acid water having a high effective chlorine concentration that can be used for food ingredients and food sterilization The water production apparatus, as shown in Figure 1, constituted a raw material tank 10, a raw water supply 20, a mixer 30 and an electrolysis tank 40.

The raw material tank 10 is a place to store and supply 2 to 6% of diluted hydrochloric acid.

The diluted hydrochloric acid supplied from the raw material tank 10 is supplied to the mixer 30 through the first metering pump 12 and the first check valve 13 of the raw material supply conduit 11.

The raw water supply 20 is supplied to the mixer 30 through the second metering pump 22 and the second check valve 23, the raw water, such as water for diluting the raw material.

The mixer 30 is connected to the raw material tank 10 and the raw material supply conduit 11 and is connected to the raw water supply 20 and the first raw water supply conduit 21 to supply the hydrochloric acid and raw water supplied to the first stirrer 35 Stirring and mixing by using to prepare brine and send it to the electrolysis tank 40 through the third metering pump 32 and the third check valve 33.

The electrolysis tank 40 is a barrier-free electrolytic cell composed of an anode (+) and a cathode (-), and is supplied with brine through a mixture supply conduit 31 from the first mixer 30 to electrolytic oxidation through electrolysis. A solution, preferably a solution of a mildly acidic hypochlorous acid, is prepared.

A related chemical formula for obtaining a solution of a hypo-acidic hypochlorous acid through the electrolysis tank 40 according to an embodiment of the present invention is as follows.

Anode (+) reaction

Cl ₂ + H ₂ O → HOCl + HCl

Cathode (-) reaction

2Na + 2H ₂ O → 2NaOH + H ₂

Mixed reaction

HOCl + HCl → 2NaOH + H ₂

→

NaOCl + NaCl + 2H ₂ O + H ₂

Thus, through the electrolysis tank 40 as described above, a slight acidic hypochlorous acid water having a concentration of 30 to 200 ppm that can be used for sterilization of food appliances is obtained.

In addition, the electrode is generally formed with divalent metal oxides on the cathode, which gradually contacts the anode to generate a short. At this time, the electrode is normally reversed or pickled, but in this case, it promotes the consumption of the anode electrode. The overall life for the electrodes is shortened.

Therefore, in the present invention, sodium hypochlorite is used by using an electrode to which a divalent metal ion such as Ca2+ does not adhere by coating a hydrophobic film (a film made of a hydrophobic material that is not intimate with water) in order to increase the electrolytic efficiency with respect to the negative electrode. A device to generate was developed.

That is, as the hydrophobic film, a hydrophobic organic film coated with PTFE (Polytetrafluoroethylene), PVDF (Polyvinylidene fluoride), PP (Polypropylene), or an inorganic film subjected to hydrophobic treatment was used.

In another embodiment of the present invention, as shown in FIG. 2, in addition to the configuration of one embodiment as described above, the electrolysis tank 40 was provided with a diluter 50.

When the diluent 50 is supplied with the electrolytic oxidant from the electrolysis tank 40 and measures the concentration through the concentration meter 51, it is higher than the value of the acidic hypochlorous acid, and the raw water supply 20 The raw water is supplied from the second raw water supply conduit 22 through the second metering pump 22 and the fourth check valve 53, stirred and diluted using a second stirrer 55, and highly concentrated, highly acidic hypochlorous acid water To prepare.

The related chemical formula for obtaining the acidic hypochlorous acid solution through the electrolysis tank 40 according to another embodiment of the present invention is as follows.

Anode (+) reaction

HCl → H ^{+ +} Cl ^-

2Cl ^- → Cl ₂ + 2e ^-

Cl ₂ + H ₂ O → HClO + HCl

Cathode (-) reaction

2HCl → 2H ^{+ +} 2Cl ^-

2H ^{+ +} 2e ^- → H ₂

Therefore, it is possible to obtain a highly concentrated, highly acidic hypochlorous acid water, which is the object of the present invention, through the above-described diluent 50.

As described above, although the present invention has been described by a limited embodiment, the present invention is not limited to this, and will be described below and the technical thoughts of the present invention by those skilled in the art to which the present invention pertains. Various modifications and variations will be possible within the scope of the patent claims.

10: Raw material tank 11: Raw material supply conduit
12: first metering pump 13: first check valve
20: raw water supply 21: raw water supply conduit
22: second metering pump 23: second check valve
30: mixer 31: mixture supply conduit
32: third metering pump 33: third check valve
35: first stirrer
40: electrolysis tank
50: thinner 51: concentration meter
53: fourth check valve 55: second stirrer

Claims (3)

A raw material tank 10 storing and supplying 2 to 6% of diluted hydrochloric acid;
A raw water supplier 20 that supplies raw water;
The raw material tank 10 is connected to the raw material supply conduit 11 and connected to the raw water supply 20 and the first raw water supply conduit 21 to agitate the supplied hydrochloric acid and raw water using a first stirrer 35 And a mixer 30 to prepare brine by mixing. And
It is characterized in that it comprises a; a bulkhead electrolytic cell, an electrolysis tank 40 for supplying the brine from the first mixer 30 through the mixture supply conduit 31 to produce an electrolytic oxidizing solution through electrolysis; An acidic hypochlorous acid water production apparatus.
The method according to claim 1, If the concentration is measured through a concentration meter 51 after receiving the electrolytic oxidizing solution from the electrolysis tank 40, if it is higher than the value of the acidic hypochlorous acid, the raw water supply 20 2 Misalignable hypochlorous acid, characterized in that it further comprises a diluent (50) for preparing the acidic hypochlorous acid by stirring and diluting it using a second stirrer (51) to receive raw water from the raw water supply conduit (22). Chlorine acid water production equipment.
The apparatus according to claim 1, wherein the cathode of the electrolysis tank 40 is coated with a hydrophobic film of polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) or polypropylene (PP).

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