JP3434136B2 - Ozone water production equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone water producing apparatus applied to sterilization / washing / deodorization / decolorization or freshness preservation / revival of fruits and vegetables.

[0002]

2. Description of the Related Art An example of a conventional ozone water producing apparatus applied to sterilization will be described with reference to FIGS.

In the ozone water producing apparatus shown in FIG. 5, the water in the ozone water storage tank 22 is ejected by the circulation pump 23 to the ejector 2.
7. The ejector 27 is circulated between the compressor 2 and the compressor 2.
6. Ozone water is produced by sucking the ozone gas generated by the silent discharge ozone generator 21 to which oxygen is supplied through the PSA oxygen separator 25 and the cooling / dehumidifier 24 and mixing it with water. There is. In this type of ozone water manufacturing apparatus, the concentration of ozone water can be increased by repeatedly circulating water to gradually dissolve ozone.

Further, the ozone water production apparatus shown in FIG. 6 is a OH <br/> zone down dissolve tank 32 and those using electrolytic ozone generator 31 (invention patent -1764475), ozone dissolution In the tank 32, an exhaust ozone water treatment device 33 in which an air pump 38 is connected and an air aerator 39 is provided inside is connected to a lower portion via a pump 37, and an exhaust ozone gas treatment device 35 is provided in an upper portion.
Is connected.

The ozone dissolution tank 32 sprays water as a large number of fine water drops from the upper part of the tank and disperses the water in the ozone gas stored in the tank as water drops or a water film to produce ozone water. The ozone water concentration can be increased by reducing the amount of water sprayed.

Further, this ozone water producing apparatus is capable of producing high-concentration ozone water by adopting the electrolytic ozone generator 31 as an apparatus for generating ozone. The electrolytic ozone generator 31 is connected to a deionizer 34 and a hydrogen treatment device 36, can generate high-concentration ozone gas, and produces high-concentration ozone water under the same dissolution conditions. be able to.

The electrolytic ozone generator 31 is composed of a plurality of electrolytic cells 1a, a raw water tank 1b, a membrane transfer water tank 1c and a pump 1d as shown in FIG. 6 (b). When the cells 1a are stacked vertically as shown in FIG. 6 (d), the ozone gas moves laterally between the electrolysis cells 1a, and it is difficult to separate the ozone gas from the electrolysis cell 1a. Therefore, as shown in FIG. 6 (c). Side by side.

The ozone water producing apparatus shown in FIG. 7 is a small ozone water producing apparatus using a discharge type ozone generator 41, and includes an air supply blower 45, a PSA oxygen separator 44 and a cooling / dehumidifier 43. The raw material oxygen is discharged through
Ozone water is produced by supplying ozone to the ozone generator 41 and mixing the generated ozone gas with tap water by the ejector 42.

This small-sized ozone water producing apparatus is small in size because it is not provided with a dissolution tank inside the apparatus, and can easily produce ozone water only by supplying tap water and electric power.

[0010]

The conventional ozone water producing apparatus has the following problems, respectively.

In the case of the apparatus for increasing the concentration of ozone water by circulation shown in FIG. 5, it takes time to increase the concentration to a certain specified concentration, and it is not possible to instantaneously deal with the change in the concentration even after the specified concentration is achieved. Also, in order to maintain a constant concentration, it is necessary to constantly emit ozone gas,
There was a problem that workability deteriorates and power consumption increases.

Further, in order to increase the concentration by circulating, an ozone water storage tank and a circulation pump are required, so that the entire apparatus becomes large. In addition, the ozone water temperature rises due to the heat generated from the circulation pump, which reduces the dissolution rate of ozone gas, but in order to prevent this, it is necessary to attach a cooling device to the ozone water storage tank, and the size of the device is further increased. There was a problem that it became complicated.

In the case of the apparatus shown in FIG. 6, in order to obtain high-concentration ozone water, it is necessary to enlarge the dissolution tank for producing high-concentration ozone water, and the produced ozone water is pumped out of the apparatus. However, the problem of increasing the size and complexity of the device has not been solved.

In the case of the apparatus shown in FIG. 7, an air supply blower, a PSA oxygen separator, etc. are required to supply oxygen, which is a raw material of the discharge ozone generator , so that noise and vibration of the apparatus are large. There was a problem such as.

Further, in the PSA type oxygen separator, only oxygen cannot be completely separated and nitrogen remains in the raw material, so that nitrogen oxide may be generated during discharge. Further, since there is a possibility that metal dust is generated during discharge, there is a problem that the produced ozone water is not clean, such as nitric acid or metal dust being mixed in ozone water.

Further, since the concentration of ozone gas generated by the discharge type ozone generator, that is, the partial pressure of ozone gas is relatively low, the efficiency of dissolution in water is low. Therefore, the concentration of ozone water dissolved by the ejector is also generally low. Therefore, there is a problem that a large amount of ozone gas is required to increase the concentration of ozone water, which is not economical and the amount of residual ozone gas is large. The present invention is intended to solve the above problems.

[0017]

[Means for Solving the Problems]

(1) The ozone water producing apparatus of the present invention includes an ion exchange resin tower that is supplied with tap water to generate ion exchange water, a gas-liquid separation tank to which ion exchange water is supplied from the ion exchange resin tower, and the same gas-liquid separation. A water electrolysis type ozone generator that supplies a mixed gas of ozone and oxygen generated by injecting ion-exchanged water through a heat exchanger provided below the tank to the gas-liquid separation tank, and ozone generated by the ozone generator Is provided through the gas-liquid separation tank, and the tap water is supplied to the ejector for discharging ozone water.

In the above, the ion-exchange resin tower supplied with tap water supplies this to the gas-liquid separation tank as ion-exchanged water, and the ion-exchanged water supplied to the gas-liquid separation tank is cooled by the heat exchanger. Injected into the water electrolysis ozone generator,
The ozone generator generates a mixed gas of ozone and oxygen.

The mixed gas generated by the ozone generator is
It rises with the ion-exchanged water, reaches the gas-liquid separation tank through the pipe, and is separated from the ion-exchanged water. The mixed gas separated in the gas-liquid separation tank is sucked into the ejector, which has a negative pressure due to the flow of tap water inside, and the ejector dissolves this mixed gas into tap water to generate ozone water. To discharge.

In the present invention, since the water electrolysis type ozone generator capable of producing a high concentration ozone gas is used, the dissolution efficiency can be improved, the efficiency of ozone water production can be improved, and the residual ozone can be reduced. The size of the device can be reduced.

Further, since the ozone generator uses ion-exchanged water generated from tap water in the ion-exchange resin tower as the raw material water, clean ozone water can be generated without generating impurities. .

Further, since the ozone gas is dissolved in tap water by an ejector utilizing the water pressure of tap water,
(EN) A device that can dissolve ozone gas without using a driving device and can save energy.

(2) The present invention is the ozone water producing apparatus according to the above-mentioned invention (1), in which a water electrolysis type ozone generator has a plurality of electrolysis cells arranged vertically and a raw water tank, It is characterized in that it is formed by arranging a membrane transfer water tank in the lower part.

In the present invention, the water electrolysis type ozone generator has a plurality of electrolysis cells arranged vertically, and a raw water tank and a membrane transfer water tank are respectively arranged above and below the electrolysis cell. Due to the gas lift effect of the gas, it is possible to reduce the size of the ozone generator, and thus the size of the entire device, while maintaining the same performance of releasing the mixed gas from the electrolytic cell as in the conventional device.

(3) The present invention is characterized in that the ozone water producing apparatus according to the above-mentioned invention (1) is provided with a hydrogen treatment device for introducing hydrogen gas from a water electrolysis type ozone generator and discharging water vapor. There is.

In the present invention, by providing the hydrogen treatment device for burning the hydrogen generated by the water electrolysis type ozone generator, it is possible to treat the hydrogen in the apparatus, so that the workability can be improved. Become.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION An ozone water producing apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

In the ozone water producing apparatus according to the present embodiment shown in FIG. 1, an ion exchange resin tower 5 whose inlet side is connected to a water faucet 12 via an electromagnetic valve 10a, and an electromagnetic valve 10b at the outlet side of the tower 5. Gas-liquid separation tank 2 and the same tank 2 connected via
Is connected via a heat exchanger 4 provided with a fan 3 to an upper part of the pipe 13 at the lower part of the gas-liquid separation tank 2.
Connected to the water electrolysis type ozone generator 1 and the gas-liquid separation tank 2 via the check valve 11a at the upper portion thereof, and the inlet side thereof is connected to the water faucet 12 and the electromagnetic valve at the outlet side thereof. The ejector 7 with the turbulent flow generation plate 10c is provided.

An exhaust ozone treatment 8 for releasing oxygen to the atmosphere is connected to the upper part of the gas-liquid separation tank 2 via a check valve 11b, and the lower part of the water electrolysis type ozone generator 1 is connected. Is connected to a hydrogen treatment device 9 that releases water vapor to the atmosphere, and is connected to the inlet side of the ion exchange resin tower 5 through a pump 6 and a check valve 11c.

Next, the apparatus according to this embodiment is used.
The manufacturing procedure of ozone water will be described below. First,
The tap water tap 12 is opened to supply tap water to the ion exchange resin tower 5 and the turbulent flow generator ejector 7.

The tap water supplied to the ion exchange resin tower 5 is deionized into ion exchange water, and the solenoid valve 10
It is supplied to the gas-liquid separation tank 2 via b and is further injected into the water electrolysis type ozone generator 1 via the heat exchanger 4. Regarding the gas-liquid separation tank 2, the electromagnetic valve 10b is opened / closed by the signal of the capacitance-type liquid level sensor to keep the internal water level constant.

Inside the water electrolysis type ozone generator 1 into which the ion exchanged water is injected, an anode electrode 14 and a cathode electrode 15 to which a DC voltage is applied with an ion exchange membrane 16 interposed therebetween.
Is provided, and when a DC voltage is applied to these, a mixed gas of ozone and oxygen is generated from the anode. This mixed gas is a water electrolysis type ozone generator 1 due to the gas lift effect.
With the ion-exchanged water stored therein, it rises as a slag flow in the pipe 13 between the water electrolysis type ozone generator 1 and the gas-liquid separation tank 2 and flows into the gas-liquid separation tank 2.

The slag flow rising in the pipe 13 acts as a driving force together with the head of the ion-exchanged water in the gas-liquid separation tank 2, and the ion-exchanged water in the gas-liquid separation tank 2 is blown by the fan 3. Water is passed through the heat exchanger 4 that is air-cooled.
It also works to send it to the electrolytic ozone generator 1.

The ion-exchanged water injected from the gas-liquid separation tank 2 into the water electrolysis type ozone generator 1 is cooled by the heat exchanger 4, which is performed in the water electrolysis type ozone generator 1. This is for suppressing the temperature rise of the water electrolysis type ozone generator 1 associated with water electrolysis .

The mixed gas of ozone and oxygen that has risen to the gas phase above the gas-liquid separation tank 2 is sucked by the ejector 7 due to the negative pressure generated in the ejector 7 by using the flow of tap water as a driving force, and inside the ejector 7. It is mixed with water to produce ozone water.

When the ejector is stopped, the water
Since the ozone generated by the electrolytic ozone generator 1 is extra, this ozone is guided to the waste ozone treatment device 8, decomposed into oxygen to be harmless, and then released to the atmosphere.

Further, although hydrogen is generated from the cathode of the water electrolysis type ozone generator 1, the hydrogen is processed by the hydrogen processor 9 and released to the atmosphere as water vapor. Moving water that has moved from the anode side of the solid polymer membrane as the cathode side, for reuse as a raw material water is supplied to the inlet side of the ion-exchange resin tower 5 by a pump 6, the gas after having been treated deionized It is returned to the liquid separation tank 2.

[0038] In this embodiment, the ion-exchange resin column 5 on the upstream side of the water electrolytic ozone generator 1 is provided, which, the water to be supplied to the ion-exchanged water in the water electrolytic ozone generator 1 This is because the water electrolysis type ozone generator 1 produces only ozone and oxygen at the anode and hydrogen at the cathode and does not produce other impurities, and the produced ozone water is clean.

The ion-exchange resin tower 5 comprises an ion-exchange resin 5a provided with a cap 5c via a net 5b as shown in FIG. 2, such as Amberlite MB-2 manufactured by Organo Corporation. There is.

Further, the water is used electrolytic ozone generator 1 as an ozone generator, the ozone concentration of the gas as the discharge type is generated, whereas a 4～6Wt%, water electrolytic In the case of the thing, it is because of high concentration of 14-18 wt%. Dissolution of ozone gas in water is proportional to its concentration in accordance with Henry's law, so when using the same dissolver to produce ozone water, electrolytic ones produce higher concentrations of ozone water than discharge types. This is because it can be manufactured.

The water electrolysis type ozone generator 1 is shown in FIG.
As shown in (a), the anode electrode 14 and the cathode electrode 15 arranged vertically, the ion exchange membrane 16 provided between the electrodes 14 and 15, and the anode arranged outside the electrodes 14 and 15. A plurality of electrolytic cells 1a including side separators 17, cathode side separators 18, and gaskets 19 arranged on the sides of the electrodes 14 and 15 are provided.

As the ion exchange membrane 16 provided between the electrodes 14 and 15, Nafion 117 manufactured by DuPont, USA having the chemical structural formula shown in FIG. 3B can be used.

In the case of the conventional water electrolysis type ozone generator 1 ,
As shown in FIG. 6 (b), the electrolytic cell 1a was arranged in the lateral direction, and the raw material water tank 1b and the membrane transfer water tank 1c were arranged at positions slightly apart from the side portions thereof.

However, in this embodiment, as shown in FIG.
As shown in (a), the electrolysis cells 1a are vertically stacked,
The raw water tank 1b is arranged at the upper part, and the membrane transfer water tank 1c is arranged at the lower part thereof. As shown in FIG. 4 (b), ozone gas passes through the raw water tank 1b by its gas lift effect.
As well as the conventional device, the gas transfer is performed well, and the device is made compact.

Regarding the ejector 7, the tap water pressure is used to bring ozone gas into contact with the tap water to dissolve it without using a drive pump, and this is provided with a turbulent flow generation plate to generate a turbulent flow. Has achieved high dissolution efficiency.

Further, the raw material water pipe, the driving water pipe, the cooling water pipe, etc. are branched inside the device and supplied from outside the device by a single pipe, and the power source is also supplied from outside the device. Facilitates water electrolysis and the operation of various parts only by supplying AC100V, and the hydrogen gas generated by the water electrolysis type ozone generator is treated in the apparatus by a catalytic combustion burner for the convenience of handling.

In order to confirm the performance of the device according to the present embodiment, ozone water is manufactured using this device, and the contents will be described below. The mixed gas generated by the water electrolysis type ozone generator has ozone of 4.0 g /
h = 69 mg / min, oxygen 24.6 g / h = 4.1 g /
min, and the ozone concentration was 14 wt%.

When 5 liter / min of tap water was supplied to the ejector together with this mixed gas, the ozone concentration was 1
It was possible to obtain 0 mg / l of ozone water at a flow rate of 5 l / min. Therefore, the ozone dissolution rate is 5 mg / mi
n, the dissolution effect was 74.6%.

[0049]

The ozone water producing apparatus of the present invention comprises an ion-exchange resin tower for producing ion-exchanged water from tap water and supplying it to the gas-liquid separation tank, and ion-exchanged water injected from the gas-liquid separation tank. The water electrolysis type ozone generator that supplies ozone to the separation tank and the ejector that dissolves the ozone supplied from the separation tank into tap water to generate and discharge ozone water The efficiency of production, the reduction of residual ozone, the downsizing of equipment, and the production of clean ozone water are possible. The ozone generator has a plurality of decomposition cells arranged vertically, and a raw water tank at the upper and lower parts. By providing the membrane moving water tank, the apparatus can be further downsized, and by connecting the hydrogen treatment device to the ozone generator, the workability can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an ozone water producing apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an ion exchange resin tower according to the above embodiment.

3A and 3B are explanatory views of an electrolysis cell forming the water electrolysis type ozone generator according to the above embodiment, in which FIG. 3A is a sectional view and FIG.
FIG. 3 is an explanatory diagram of an ion exchange membrane.

4A and 4B are explanatory views of a water electrolysis type ozone generator according to the above embodiment, FIG. 4A is a side view, and FIG.

FIG. 5 is an explanatory diagram of an example of a conventional device.

6A and 6B are explanatory views of another example of a conventional device, FIG. 6A is an overall view, FIG. 6B is an explanatory view of an ozone generator, and FIG. Explanatory drawing of the case, (d)
[Fig. 3] is an explanatory view of a case where they are arranged vertically.

FIG. 7 is an explanatory diagram of still another example of the conventional device.

[Explanation of symbols]

1 Water electrolysis type ozone generator 1a Electrolysis cell 1b Raw water tank 1c Membrane transfer water tank 2 gas-liquid separation tank 3 fans 4 heat exchanger 5 Ion exchange resin tower 6 pumps 7 ejectors 8 Waste ozone treatment device 9 Hydrogen treater 10a, 10b, 10c Solenoid valve 11a, 11b, 11c Check valve 12 water faucet 13 Piping

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI C02F 1/50 531 C02F 1/50 531R 540 540A 550 550H 560 560D 560Z (56) References JP 62-221490 (JP, A) ) JP-A-7-126883 (JP, A) JP-A-5-295579 (JP, A) JP-A-2-101184 (JP, A) Actual flat 7-42355 (JP, U) Actual flat 6- 72695 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) C02F 1 / 78,1 / 50 C01B 13/10

Claims (3)

(57) [Claims] 1. An ion exchange resin tower for supplying tap water to produce ion exchange water, a gas-liquid separation tank to which ion exchange water is supplied from the ion exchange resin tower, and a heat provided below the gas-liquid separation tank. A water electrolysis type ozone generator that supplies a mixed gas of ozone and oxygen generated by injecting ion-exchanged water through an exchanger to the gas-liquid separation tank, and ozone generated by the ozone generator operates in the gas-liquid separation tank. An ozone water producing apparatus comprising: an ejector which is supplied via the tap water and discharges ozone water. 2. The ozone water producing apparatus according to claim 1, wherein a water electrolysis type ozone generator has a plurality of electrolysis cells arranged vertically, a raw water tank above and a membrane transfer water tank below. An ozone water producing apparatus, which is arranged and formed. 3. The ozone water producing apparatus according to claim 1, further comprising a hydrogen treatment device for introducing hydrogen gas from a water electrolysis type ozone generator and discharging water vapor.