WO2006038298A1

WO2006038298A1 - Apparatus for producing ozone water

Info

Publication number: WO2006038298A1
Application number: PCT/JP2004/014821
Authority: WO
Inventors: Norikazu Takada
Original assignee: Grow Co., Ltd.
Priority date: 2004-10-07
Filing date: 2004-10-07
Publication date: 2006-04-13
Also published as: JPWO2006038298A1; CN101052460A

Abstract

[PROBLEMS] To provide an apparatus for producing an ozone water which can dissolve an ozone gas into a raw water at a high concentration and also can produce it at a low cost. [MEANS FOR SOLVING PROBLEMS] An apparatus for producing an ozone water which comprises an aspirator (120) for contacting a raw water with an ozone gas formed in a section (110) for generating an ozone gas, and a gas-liquid dissolution section being connected to the aspirator (120) and comprising a tube (130) having concave portions (131) and convex portions (132) formed alternately on the inside surface thereof, and which dissolves an ozone gas into the raw water at a high concentration, through allowing a mixed fluid of an ozone gas and the raw water to flow in the tube (130).

Description

Specification

Ozone water production equipment

Technical field

TECHNICAL FIELD [0001] The present invention relates to an ozone water production apparatus that generates ozone water by bringing ozone gas into contact with raw material water, and more specifically, a gas-liquid dissolving portion that dissolves ozone gas in water and a recess formed in the inner surface. The present invention relates to an ozone water production apparatus composed of tubes in which protrusions and convex portions are alternately formed.

Background art

[0002] Ozone (a chemical formula 03) is known to have a strong acid squid and is extremely effective for sterilization and deodorization. There is ozone water produced by dissolving in water. Ozone water is used as washing water for hand-washing in the medical and food fields, and is used for sterilization and washing of medical equipment, food production equipment, dishes, and the like. In addition, ozone is not only persistent but also has the effect of decomposing and detoxifying harmful organic substances like other disinfectants and oxidants such as chlorine, sodium hypochlorite, and hydrogen peroxide. The scope of use is expected to further expand in the future as problems become more serious.

[0003] Ozone water is produced by bringing ozone gas produced by an ozone gas generator into contact with water and dissolving it. There are mainly silent discharge method and electrolysis method for producing ozone gas. The silent discharge method is a method in which ozone gas is generated by causing discharge while flowing an oxygen-containing gas between a pair of electrodes arranged in a parallel plate shape or a coaxial cylindrical shape. As an ozone gas generator using the silent discharge method, for example, a double dielectric tube is covered with a solid dielectric tube, and an electrolyte solution or water is sealed between the discharge tube and the solid dielectric tube. On the other hand, there is a configuration in which the inside of the discharge tube is cooled by an electrolyte solution, water, or air (see Patent Document 1). Also, the electrolysis method consists of a pair of electrodes with an electrolyte membrane sandwiched in water! A direct voltage is applied across the two electrodes to cause electrolysis of water, and at the same time oxygen is added to the oxygen generation side. This is a method of generating ozone. Examples of ozone gas generators based on electrolysis include solid polymer electrolyte diaphragms. On the side, a pair of electrodes of an anode and a cathode provided with the water supply part in contact with the electrode surface is disposed, and a water guide part for replenishing water is connected to the water supply part (see Patent Document 2) .

[0004] An ozone water production apparatus usually includes the ozone gas generator as described above and a gas-liquid dissolving part for dissolving ozone gas generated by the ozone gas generator in raw water. Examples of the gas-liquid dissolving part include a publishing method in which ozone gas is blown from the bottom of the water tank, a ejector method in which a narrow part is provided in a part of the raw water piping, and ozone gas is blown into it, and a pump. There are a stirring method in which water and ozone gas are stirred, and a diaphragm dissolution method in which water is passed through a porous membrane and ozone gas is allowed to flow outside the porous membrane to absorb ozone gas. Of these, the ejector method is advantageous in terms of cost and size because the configuration of the apparatus can be simplified.

[0005] An ozone water production apparatus having a gas-liquid dissolving part, which is a combination of this ejector method and a static mixer, has been proposed (see Patent Document 3). A static mixer is constructed by connecting a plurality of spirally rotating blades in a pipe. When two or more fluids flow through the inside of the noise, More than seed fluid is divided and mixed by the presence of a plurality of blades and stirred and mixed. As a stationary mixer, for example, a first blade member formed in a spiral shape by rotating 180 ° clockwise in a spiral shape inside a cylindrical member through which a fluid such as gas or liquid flows, A second blade member that is formed by rotating 180 ° in a clockwise direction is disposed, and a hole is provided at the boundary between the first blade member and the second blade member to form a plurality of fluid passages. (See Patent Document 4). By adopting such a static mixer, the mixing efficiency of ozone gas and raw water can be improved.

[0006] However, on the other hand, a static mixer has a complicated manufacturing process and high manufacturing costs, and thus an ozone gas manufacturing apparatus using the static mixer is expensive.

Patent Document 1: Japanese Patent Laid-Open No. 2003-206108

Patent Document 2: JP-A-7-157301

Patent Document 3: Registered Utility Model No. 3100194

Patent Document 4: Japanese Patent No. 33392692

Disclosure of the invention Problems to be solved by the invention

[0007] Therefore, the present invention has an object to provide an ozone water production apparatus that can be manufactured at low cost while having a gas-liquid mixing performance comparable to an ozone water production apparatus that employs a static mixer. is there.

Means for solving the problem

[0008] In order to solve the above-mentioned problem, the means adopted by the invention according to claim 1 is an ozone water production apparatus for generating ozone water by dissolving ozone gas in raw water, in the ozone gas generation section. An aspirator for contacting the generated ozone gas and raw water, and a tube force connected to the aspirator and having recesses and protrusions alternately formed on the inner surface, and the inside of the tube is filled with ozone gas and raw water. And a gas-liquid dissolving part that dissolves ozone gas in the raw material water by flowing.

That is, in the ozone water production apparatus according to claim 1, ozone gas and raw material water are caused to flow into the inside of the tube, which is a gas-liquid dissolving part, via the aspirator, and the ozone gas and raw material water flow in the tube. At this time, the ozone gas is dissolved in the raw material water by colliding with the concave and convex portions to form a turbulent state. By adopting a tube having concave and convex portions inside as the gas-liquid dissolving part, the same gas-liquid mixing performance can be obtained at a lower cost than the conventional static mixer.

[0010] Further, according to the means of the invention described in claim 2, the tube has a plurality of recesses and projections alternately formed on the inner surface, each formed in a spiral shape in the axial length direction. The ozone water production apparatus according to claim 1, wherein

[0011] By forming a concave portion and a convex portion formed inside the tube in a spiral shape continuously in the axial length direction, ozone gas and raw material water spiral along the concave portion and the convex portion in the tube. Therefore, dissolution efficiency can be further improved.

[0012] Further, according to the means taken by the invention of claim 3, the tube is formed of a material having at least an inner surface of which has ozone resistance, according to claim 1 or 2. Ozone water production device.

[0013] By forming the inner surface of the tube from a material having ozone resistance, ozone gas Corrosion deterioration of the tube due to contact can be prevented.

The invention's effect

[0014] According to the ozone water producing apparatus according to claim 1, the gas-liquid dissolving part connected to the aspirator is formed from a tube in which concave parts and convex parts are alternately formed on the inner surface. When the ozone gas and raw material water contacted by the aspirator flow in the tube, they are resisted by the concave and convex portions and become turbulent, so that the ozone gas can be dissolved in the raw water at a high concentration. It becomes. In addition, since the gas-liquid dissolving part can be created at low cost, an ozone water production apparatus having excellent ozone gas solubility can be provided at low cost.

[0015] According to the ozone water production apparatus according to claim 2, in addition to the effect of the ozone water production apparatus according to claim 1, a plurality of recesses and projections formed on the inner surface of the tube are provided. Since the ozone gas and the raw material water are more likely to form a turbulent flow state by being continuously formed in a spiral shape in the axial direction, the ozone gas dissolution efficiency can be further improved.

[0016] According to the ozone water production apparatus according to claim 3, since the inner surface of the tube is formed of a material having ozone resistance, the corrosion deterioration caused by the contact with ozone gas is less likely to occur. This can be prevented and the frequency of maintenance can be reduced, so the running cost can be kept low.

BEST MODE FOR CARRYING OUT THE INVENTION

The ozone water production apparatus according to the present invention includes an ozone gas generation unit, an aspirator, a gas-liquid dissolution unit, and a gas-liquid separation unit.

[0018] An existing ozone gas generator can be used for the ozone gas generating section. For example, a discharge is generated while an oxygen-containing gas flows between a pair of electrodes arranged in a parallel plate shape or a coaxial cylindrical shape. Silent discharge type ozone gas generator that generates ozone gas through a pair of electrodes with an electrolyte membrane sandwiched in water, and a DC voltage is applied between the two electrodes to cause electrical decomposition of the water. An electrolytic ozone gas generator that generates ozone simultaneously with oxygen can be used on the generation side.

[0019] The aspirator is for bringing the raw material water into contact with the ozone gas generated in the ozone gas generation section. That is, the aspirator is connected to raw water supply means such as waterworks and ozone gas generator. The ozone gas generated in the ozone gas generating section can be introduced into the aspirator by the negative pressure generated in the aspirator as the raw water passes through the aspirator and brought into contact with the raw water.

[0020] As raw water, tap water is filtered to remove impurities such as iron trough, organic matter, and chlorine, or pure water using reverse osmosis membrane (RO membrane) from tap water. It is preferable to use water from which impurities have been removed, such as pure water purified by a vessel, distilled water commercially available for medical use, sterilized purified water, and water for injection.

[0021] The gas-liquid dissolving section is for generating ozone water by dissolving ozone gas brought into contact with raw material water in the aspirator in the raw water. For the gas-liquid dissolving part, a tube having a concave part and a convex part formed on the inner surface is used. Examples of the shape of the inner surface include those formed in a bellows shape, and those in which a concave portion and a convex portion each form a spiral in the axial length direction, and among these, a spiral shape is ozone gas. It is especially preferred because it is easy to form a turbulent state without any retention of raw material water.

[0022] The inner diameter of the tube is not particularly limited, and may be adjusted according to the flow rate of the raw material water. Further, the length of the tube is not particularly limited, but it is preferable to set it within the range of 50 mm-1 OOOmm. This is because if the length is shorter than 50 mm, ozone water having a sufficient ozone concentration cannot be obtained, and if it is longer than 1000 mm, no more ozone water concentration can be obtained.

[0023] Further, at least the inner surface of the tube is preferably formed of a material having ozone resistance. This is because the inner surface is made of a material having ozone resistance, which causes corrosion deterioration of the tube. Examples of the material having ozone resistance include fluorine resin such as polytetrafluoroethylene tetrafluoroethylene resin, pure titanium, ceramic, glass, etc., and the entire tube may be formed of these materials. The surface can be coated with these materials.

[0024] Further, the ozone water production apparatus is provided with a gas-liquid separation unit that separates excess ozone gas that has not been dissolved in water, while storing ozone water generated in the gas-liquid dissolution unit. Good. The surplus ozone gas separated in the gas-liquid separation unit is decomposed into oxygen through an ozone gas processing unit connected to the gas-liquid separation unit, and discharged to the outside. ozone The gas is extremely useful for sterilization, deodorization, etc., but high-concentration ozone gas is dangerous for the human body. The ozone gas treatment methods include activated carbon decomposition method, catalyst method, thermal decomposition method, etc., and existing ozone gas treatment equipment using these methods can be used.

Example

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic diagram of an ozone water production apparatus 100 according to this embodiment.

[0026] The ozone water production apparatus 100 has an ozone gas generation unit 110, an aspirator 120, a spiral tube 130 as a gas-liquid dissolution unit, a gas-liquid separation unit 140, an ozone gas treatment unit 150, and an ozone water output unit 160. is doing.

[0027] The ozone gas generation unit 110 is connected to an oxygen cylinder (not shown), and an alternating high voltage is generated while flowing an oxygen gas supplied from the oxygen cylinder between a pair of electrodes arranged in a parallel plate shape. A silent discharge type that generates ozone gas when applied is adopted. This ozone gas generation part is connected to the aspirator 120, and the generated ozone gas flows into the aspirator 120.

[0028] The aspirator 120 is connected to the water supply via a filtration filter (not shown), and is connected to the ozone gas generation unit 110. A pipe line into which purified water filtered by the filtration filter flows, A conduit for ozone gas to flow into it is formed. The ozone gas is sucked by the negative pressure generated when purified water flows into the aspirator 120 and mixed with purified water. The aspirator 120 is connected to a spiral tube 130 described in detail below, and ozone gas and purified water mixed in the aspirator 120 flow out toward the spiral tube 130.

[0029] One end of the snail tube 130 is connected to the aspirator 120, and the other end is connected to a gas-liquid separator 140 described later. FIG. 2 shows a snoral tube 130 as a gas-liquid mixing unit disposed in the ozone water production apparatus according to the present embodiment. As shown in FIG. 2, the snow tube 130 has a plurality of recesses 131 and protrusions 132 alternately formed on the inner surface thereof, and the plurality of recesses 131 and protrusions 132 are each continuous in the axial length direction. Formed into a spiral structure. In addition, the spiral tube 130 is resistant to ozone. Made of PTFE (polytetrafluoroethylene tetrafluoroethylene)! RU The inner diameter and length of the spiral tube 130 are set to 10 mm and 150 mm, respectively.

[0030] A mixed liquid of ozone gas and purified water flowing out from the aspirator 120 passes through the spiral tube 130. At this time, the mixed solution of ozone gas and purified water collides with the concave portion 131 and the convex portion 132 in the spiral tube 130, and rotates in a spiral to become a turbulent state. In this way, the mixed liquid becomes a turbulent state, so that the ozone gas can be efficiently dissolved in the purified water.

[0031] The gas-liquid separation unit 140 separates the ozone water generated in the spiral tube 130 from the surplus ozone gas that has not been dissolved in the purified water, and stores the ozone water. The gas-liquid separation part 140 is divided into two chambers, an ozone water inflow part 142 and an ozone water storage part 143, by a partition wall 141 suspended from the inner bottom surface. Excess ozone gas and ozone water flow into the ozone water inflow section 142 connected to the spiral tube 130. On the other hand, the ozone water storage unit 143 stores ozone water from which excess ozone gas has been removed at the ozone water inflow unit 142, and is connected to an ozone water output unit 160 that outputs ozone water to the outside. . The ozone water inflow section 142 and the ozone water storage section 143 communicate with each other upward.

[0032] Excess ozone gas that has not been dissolved in the ozone water flowing into the ozone water inflow portion 142 from the spiral tube 130 is separated from the ozone water as bubbles at the ozone water inflow portion, and the excess ozone gas is removed. The ozone water is stored in the ozone water storage unit 143. The stored ozone water is output to the outside by an operation of a switch (not shown) from the ozone water output unit 160. On the other hand, surplus ozone gas separated from the ozone water flows into the ozone gas processing unit 150. The ozone gas processing unit 150 in this embodiment employs a so-called catalytic method using manganese dioxide as a catalyst. The ozone gas that has come into contact with manganese dioxide in the ozone gas processing unit 150 is converted into oxygen and released to the outside.

[0033] Next, the ozone gas concentration in the ozone water produced by the ozone water producing apparatus 100 according to this example was measured. Table 1 shows the measurement results. The measurement conditions were: water supply volume and water supply pressure of 3.5 LZmin and 0.15 MPa, oxygen supply volume and delivery pressure, respectively. Respectively, lL / min, 0.15Mpa, supply ozone gas concentration and supply ozone gas were 80gZNm3, 8g / ozone water discharge and water temperature respectively 3.5L / min, 25 ° C, and ozone water Sampling was performed in three batches, and each ozone gas concentration was measured to obtain an average value. In Comparative Example 1, a straight tube having an inner diameter of 10 mm and a length of 150 mm was used as the gas-liquid dissolving part, and in Comparative Example 2, a straight tube having an inner diameter of 10 mm and a length of 1000 mm was used as the gas-liquid dissolving part. In Comparative Example 3, a static mixer was used for the gas-liquid dissolving part.

[0034] [Table 1]

As shown in Table 1, the average value of the ozone gas concentration in this example was 1.39 ppm higher than that of Comparative Example 1 and 1.42 ppm higher than that of Comparative Example 2. In addition, even when compared with Comparative Example 3 using a static mixer, the value was equal to or greater. From this test result, it was confirmed that the ozone water production apparatus 100 according to the present example using the spiral tube 130 as the gas-liquid dissolving part had excellent ozone gas dissolving performance.

As described above, the ozone water production apparatus 100 according to the present embodiment employs the spiral tube 130 as the gas-liquid dissolution unit, thereby providing an ozone water production apparatus having ozone gas dissolution efficiency comparable to that of a conventional static mixer. 100 can be offered at low cost.

Industrial applicability

[0036] The gas-liquid dissolving part connected to the aspirator has recesses and protrusions alternately formed on the inner surface. By configuring the tube force, it becomes possible to generate ozone water containing high-concentration ozone gas, and the device can be manufactured at a low cost. For example, devices and instruments in fields such as medical treatment and food processing It can be applied to sterilization and cleaning applications.

Brief Description of Drawings

FIG. 1 is a schematic block diagram of an ozone water production apparatus according to the present embodiment.

FIG. 2 is a partially cutaway plan view of a spiral tube as a gas-liquid dissolving part constituting the ozone water production apparatus according to the present embodiment.

Explanation of symbols

[0038] 100 ozone water production equipment

120 Aspirator

130 Spiral tube (gas-liquid dissolution part)

Claims

The scope of the claims

[1] An ozone water production apparatus for generating ozone water by dissolving ozone gas in raw material water, an aspirator for contacting ozone gas generated in an ozone gas generating section and raw water, and an internal surface connected to the aspirator And a gas-liquid dissolution part that dissolves ozone gas in the raw material water by flowing ozone gas and raw material water in the tube. Ozone water production equipment.

[2] The tube according to claim 1, wherein the tube has a plurality of recesses and projections alternately formed on the inner surface, each formed in a spiral shape continuously in the axial length direction. Zone water production equipment.

[3] The ozone water production apparatus according to [1] or [2], wherein at least an inner surface of the tube is formed of a material having ozone resistance.