JP2006198499A - Method for sterilizing water and sterilization apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sterilization apparatus capable of sterilizing flow water continuously with a simple configuration and a low operation cost, without remaining a substance in sterilized water that affects the health of mankind, and safe and cheap. <P>SOLUTION: An injector 2 is disposed to a water flow pipe 1 through which flowing water flows to pressure-feed air or ozone 3 into this injector 2. Air or ozone 3 is passed through an air diffuser plate 4 and dispersed. Gas-liquid mixture flow water 5 is made at the constriction of the water flow pipe 1 and activated by passing through between an N pole 6 and an S pole 7 of a permanent magnet 8 disposed apart from the water flow pipe 1 to react with an oxygen radical to make a hydroxyl radical, thereby sterilizing water itself. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water sterilization method and a sterilization apparatus that realizes this method, and more particularly to a method for sterilization by activating water itself to form a hydroxyl radical and a sterilization apparatus that realizes this method.

Conventionally, as a method of sterilizing water, a chemical method such as chlorine, a method using ozone gas, a method using chemicals such as sodium hypochlorite, etc. are mainly used. And photocatalytic methods were used.
However, the effect of residual chlorine by chlorine sterilization on human health is well known, and depending on the quality of the raw water, there is a possibility of generating trihalomethane, which is a carcinogen. In the case of ozone sterilization, the decomposition rate of ozone in water is slow, and it is necessary to inject high-concentration ozone to fully sterilize. However, there is a problem that it takes time to process residual ozone, and there are many problems in general use. Furthermore, the sterilization method using ultraviolet rays has a problem that the life of an irradiation tube which is an ultraviolet light emission source is limited to 8000 to 12000 hours, so that frequent replacement is necessary and the operation cost becomes expensive.
As a conventional example, for example, a method of generating and sterilizing hypochlorous acid in an electrolytic cell (see Patent Document 1), a method of using an ozone water supply device (see Patent Document 2), and a flash lamp that generates ultraviolet rays. A method to be used (see Patent Document 3) and a method by oxidation-reduction heat sterilization (see Patent Document 4) have been reported, but all have problems that the apparatus is large-scale and the operation cost is expensive. is doing.
JP 2004-202466 A JP 2004-330050 A JP 2004-57844 A JP 2004-330176 A

  In conventional water sterilization methods, chemicals such as chlorine and ozone may cause substances that affect health to remain in the water, and methods such as the use of ultraviolet rays are expensive to operate. It was. The present invention has been made to solve such problems, and can continuously sterilize running water with a relatively simple structure and low operating cost, and the sterilized water affects human health. It is an object of the present invention to provide a safe and inexpensive sterilization method that does not leave such a substance and a device that realizes the sterilization method.

In order to solve the above-mentioned problems, the invention of claim 1 of the present invention is a water sterilization method, wherein water flowing through a water pipe immediately after injecting air using an air injector and performing gas-liquid mixing is increased. Passing through the dense magnetic flux lines, the water is activated and oxygen in the air is activated, and sterilization is performed using OH ⁻ (hydroxyl radical) generated by the reaction between the water and the oxygen. It is characterized by that.

In order to solve the above-mentioned problem, the invention according to claim 2 of the present invention is a method for sterilizing water, in which water flowing through a water pipe immediately after ozone-injection and gas-liquid mixing is conducted in high-density magnetic flux lines. And is sterilized using OH ⁻ (hydroxyl radical) generated by the reaction between the active oxygen generated by the decomposition of ozone and the water activated by the magnetic flux lines.

In order to solve the above-mentioned problem, the invention of claim 3 of the present invention is a water sterilization apparatus, wherein a water pipe for flowing water and injection for injecting air or ozone pressurized into the water to perform gas-liquid mixing And at least one pair of permanent magnets whose north and south poles face each other across the water pipe, and the flowing water and the air or ozone mixed with each other are generated from the permanent magnet. It is activated by crossing the magnetic flux lines at right angles to form OH ⁻ (hydroxyl radical) to sterilize the running water.

As described above, the water sterilization method of the present invention forms OH ⁻ (hydroxyl radical) from water itself by the synergistic effect of magnetic force and oxygen, and sterilizes with this OH ⁻ (hydroxyl radical). Since it is possible to sterilize running water continuously with a simple structure and at low operating costs, and since there are no substances remaining in the sterilized water that affect human health, a safe and inexpensive sterilization method and its An apparatus for realizing the sterilization method can be provided.

  Hereinafter, a water sterilizer according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a partially transparent perspective view showing the internal structure of the water sterilizer of the present invention. Moreover, FIG. 2 is sectional drawing of one Embodiment of this sterilizer. 1 and 2, reference numeral 1 is a water pipe, reference numeral 2 is an injector, reference numeral 3 is air or ozone, reference numeral 4 is a diffuser plate, reference numeral 5 is a gas-liquid mixed flowing water, and reference numeral 6 is a permanent magnet. N pole, reference numeral 7 is an S pole of a permanent magnet, reference numeral 8 is a pair of permanent magnets of N pole and S pole, reference numeral 9 is a flange, and reference numeral 10 is a casing.

  In the configuration shown in FIGS. 1 and 2, running water is poured from the lower portion of the water pipe 1, and air or ozone 3 is pumped to the injector 2. The air or ozone 3 is dispersed through the diffuser plate 4 and mixed with the flowing water by the negative pressure generated by the flow of water in the narrowed portion of the water flow pipe 1, and the gas-liquid mixed flowing water 5 generated by this mixing is permanent. It passes between the N pole 6 and the S pole 7 of the magnet 8. Then, in accordance with Fleming's law, an electromotive current is generated in a direction perpendicular to the gas-liquid mixed flowing water 5. The intensity E of the electromotive current is proportional to the magnetic flux density B between the N pole 6 and the S pole 7 and the velocity V of the flowing water 5 and can be expressed by the equation (1).

(Equation 1)
E = kBV (1)
However, E is the intensity of the electromotive current, k is a constant, B is the magnetic flux density, and V is the velocity of flowing water.

Due to the electromotive current generated in this way, ie, the flow of electrons, water exhibits a weak electrolysis action, the bipolar nature of water molecules increases, water is activated to have a reducing power, and has high reactivity. become.
On the other hand, oxygen in the air contained in the flowing water is an electron acceptor, and oxygen O _{2 in the} ground state accepts electrons, so that active oxygen (singlet oxygen, Oxygen radicals).

(Equation 2)
O ₂ + 2e ⁻ → O ₂ ⁻ → O ⁻ + O ⁻ (2)

In addition, ozone O ₃ accelerates decomposition when passing through the magnetic flux lines, and in the process of transition to ground state oxygen O ₂ , superoxide is generated as shown in formula (3), and further decomposed into active oxygen ( Singlet oxygen, oxygen radical).

(Equation 3)
O ₃ → O ₂ ⁻ + O ⁻ → O ⁻ + O ⁻ + O ⁻ (3)

Activated and reducing water reacts with this active oxygen to produce hydroxyl radical OH ⁻ as shown in formula (4).
As a result, the running water becomes weakly alkaline, and water itself can be sterilized with water and active oxygen.

(Equation 4)
H ₂ O + O ⁻ → 2OH ⁻ (4)

In the above formula,
O ₂ ground state oxygen
O ₂ ^- superoxide
O ^- active oxygen (singlet oxygen, oxygen radicals)
OH ^- hydroxyl radical.

  Next, an embodiment embodying the water sterilization apparatus of the present invention described above will be described. In this embodiment, as shown in the cross-sectional view of FIG. 2, an injector 2 is connected to the water pipe 1 with a flange 9, and two pairs of Nd—Fe—B permanent magnets are arranged on the left and right sides of the water pipe 1. The pole 6 and the S pole 7 were disposed so as to face each other, and the whole was accommodated in the housing 10.

Table 1 shows the specifications of this example. The number of permanent magnets 8 required for the inner diameter of the water pipe 1 is roughly determined by experiment, and two pairs when the inner diameter of the water pipe 1 is 20 mmφ, three pairs when 25 mmφ, and four when 40 mmφ. A pair is the preferred number. In addition, the air discharge port received by the diffuser plate 4 has a surface in which the smaller the bubble diameter is, the easier it is for gas-liquid mixing because the bubble diameter is small. Although the bubble diameter becomes large and gas-liquid mixing is difficult, the amount of air passing therethrough increases, so the optimum value is determined experimentally.

  In FIG. 3, the structure of the water sterilization processing system using the water sterilizer of this Embodiment is shown. Water was sterilized with the system configuration shown in FIG. 3, and the water resulting from the sterilization was compared with untreated water. In the configuration of FIG. 3, 100 l of untreated raw water 12 is stored in a water tank 11, piped with a stainless steel pipe 13 having an inner diameter of 21.6φ, and the raw water 12 is sterilized by a pump 14 provided in the middle of this embodiment. And is passed through the water receiving layer 16. Air is separately pumped by the air pump 17 to the water sterilizer 15 of the present embodiment.

The test is performed by comparing the treated water that has passed through this device with the untreated raw water 12. The items compared are as follows.
PH (Potential of Hydrogen)
Redox potential Number of live bacteria Number of E. coli Number of Legionella

表２から分かるように、本実施例の水の殺菌装置を用いると、ＰＨは原水である水道水の７．１に対して、ワンパス処理で７．９とアルカリ側に変化しており、ヒドロキシルラジカルＯＨ^-の発生が高いことを示している。 The processing results are shown in Tables 2 to 6.

As can be seen from Table 2, when the water sterilization apparatus of this example is used, the pH is changed to 7.9 and alkali side by one-pass treatment with respect to 7.1 of tap water which is raw water. This shows that the generation of radical OH ⁻ is high.

表３から分かるように、本実施例の水の殺菌装置を用いると、酸化還元電位は原水である水道水の２７２ｍVから、ワンパス処理で１９６ｍVと約７２％に低下する。これにより還元力が高まり、ヒドロキシルラジカルＯＨ^-の発生が促進されることを示している。

As can be seen from Table 3, when the water sterilization apparatus of this example is used, the oxidation-reduction potential decreases from 272 mV of tap water, which is raw water, to 196 mV and about 72% by one-pass treatment. This indicates that the reducing power is increased and the generation of hydroxyl radical OH ⁻ is promoted.

表４から分かるように、本実施例の水の殺菌装置を用いると、港湾内の海水中に含まれている一般生菌の数が、１ｍｌあたり５２０個であったものがワンパス処理で８個と激減している。これにより、本装置の殺菌作用が優れていることが分かる。

As can be seen from Table 4, when the water sterilization apparatus of this example is used, the number of general viable bacteria contained in the seawater in the harbor was 520 per ml, which is 8 by one-pass treatment. It is drastically decreasing. Thereby, it turns out that the bactericidal action of this apparatus is excellent.

表５から分かるように、本実施例の水の殺菌装置を用いると、浄化槽処理水中の大腸菌が本装置でのワンパス処理で完全に陰性になっており、これにより、本装置の殺菌作用が優れていることが分かる。

As can be seen from Table 5, when the water sterilization apparatus of this example is used, Escherichia coli in the septic tank treated water is completely negative in the one-pass treatment in this apparatus, and this makes the sterilization action of this apparatus excellent. I understand that

表６から分かるように、本実施例の水の殺菌装置を用いると、浴槽中にレジオネら菌が、当初１００ｍｌ中に１４０ｃｆｕ（colony forming unit）あったものが、ワンパス処理で検出されなくなっている。これにより、本装置の殺菌効果が非常に高いことが分かる。

As can be seen from Table 6, when the water sterilization apparatus of this example was used, Legione et al. Bacteria in the bathtub were initially not detected by one-pass treatment in 140 cfu (colony forming unit) in 100 ml. . Thereby, it turns out that the bactericidal effect of this apparatus is very high.

  As mentioned above, although this invention was demonstrated along the Example of the water sterilizer, the water sterilizer which has a change in the range which does not deviate from the main point of this invention without being restricted to this Example is also the object of this invention. Furthermore, the water sterilization method used in this apparatus is also an object of the present invention.

  As described above, the present invention relates to a method and apparatus for sterilizing water, in particular, bath water, public baths, hot water hot springs, pools, seafood farms, water tank water and hot water, etc. Therefore, it can be used in a wide range of fields for sterilizing liquids such as water.

It is a partially transparent perspective view which shows the internal structure of the water sterilizer of this invention. It is sectional drawing of one Embodiment of the water sterilizer of this invention. It is a block diagram of the water sterilization processing system using the water sterilizer of this invention.

Explanation of symbols

1 water pipe 2 injector (ejector)
DESCRIPTION OF SYMBOLS 3 Air or ozone 4 Diffuser plate 5 Gas-liquid mixed flowing water 6 N pole of permanent magnet 7 S pole of permanent magnet 8 Permanent magnet 9 Flange 10 Housing 11 Water tank 12 Untreated raw water 13 Stainless steel pipe 14 Pump 15 Water sterilizer 16 Receiving tank 17 Air pump

Claims (3)

The water flowing through the water pipe immediately after performing air-liquid mixing by injecting air using an air injector passes through the high-density magnetic flux lines to activate the water and oxygen in the air And sterilizing using OH ⁻ (hydroxyl radical) generated by the reaction between the water and oxygen. The water flowing through the water pipe just after ozone injection and gas-liquid mixing passes through the high-density magnetic flux lines, and is activated by the active oxygen generated by the decomposition of the ozone and the magnetic flux lines. A method for sterilizing water, wherein sterilization is performed using OH ⁻ (hydroxyl radical) generated by the reaction with water. A water flow pipe for flowing water, an injector for injecting pressurized air or ozone into the flow water to perform gas-liquid mixing, and at least a pair of N and S poles facing each other across the water pipe A permanent magnet,
The flowing water mixed with gas and liquid and the air or ozone are activated by crossing the magnetic flux lines generated from the permanent magnet at right angles to form OH ⁻ (hydroxyl radical) to sterilize the flowing water. Water sterilizer.

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