JPH0580291U - Sterilizer by ozone sterilization method - Google Patents

Abstract

(57) [Summary] [Objective] As a means for obtaining ozone water in which ozone is dissolved for sterilization, a fine bubble generator is used to enable stable sterilization of food and tableware for a long period of time. [Structure] As a solution containing almost no ozone-consuming substance (for example, tap water) to be taken into the pressure pump of the fine bubble generator, ozone water containing ozone bubbles with a diameter of about 10 μm is prepared in this solution. By sterilizing the object to be treated with the ozone liquid and removing the surplus liquid that is contaminated as wastewater, the sterilization treatment can always be performed stably and continuously.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the field of sterilizing or disinfecting a treatment object (hereinafter simply referred to as sterilization) by dissolving ozone having sterilizing power and disinfecting power in water or other liquid. More specifically, we will improve the equipment that sterilizes food and tableware by using ozone water in which ozone is dissolved.

[0002]

[Prior Art]

 Ozone gas has a strong oxidizing power, and sterilization, deodorization, bleaching, etc. using the oxidizing action of this oxidizing power have been performed for a long time.

However, since O ₃ which is a molecular form of ozone is unstable, ozone has a property of decomposing into O ₂ and returning to oxygen gas with the passage of time even if left standing. is there.

In many other chemicals used for sterilization, unused chemicals may remain and cause chemical damage to other substances, but in the case of ozone, this chemical damage does not occur. There is also a useful side.

When ozone is used for sterilization, there are a method of sterilizing it by using it in a gaseous state and a method of dissolving it in a liquid, for example, ozone water which is an aqueous solution, and attaching an object to be treated to this liquid.

As an example of the former application, floating bacteria in a food factory are sterilized by using ozone gas at night. Alternatively, there is an example of deodorizing a room odor by generating ozone gas.

[0007] As an example of the latter, it is used to sterilize the food and tableware in a food factory by washing it with water and dissolving ozone.

As a result of experiments, it is known that when ozone is used in a gaseous state, moist ozone gas having a relative humidity of about 40% or more has a stronger bactericidal effect than when dry ozone gas is used. There is.

When an animal, especially a person, is present in an atmosphere with a high ozone gas concentration, it is harmful to the person, and the allowable concentration range for health needs to be 0.01 ppm or less.

[0010] Ozone gas is a gas that is difficult to dissolve in water, but when it is used as ozone water for sterilization, a concentration of 1 to 2 ppm is required.

Although it has been used in Europe and America for a relatively long time, the quality of water has deteriorated in Japan, and it has started to be used for sterilization and deodorization of water supply. Other uses include sterilizing pool water and increasing use of ozone water in food factories.

As one of the means for producing this ozone water, there is a fine bubble generator composed of a pressure pump and a bubble generation nozzle. The tank to which the bubble generation nozzle is attached and the suction port of this pressure pump are , Was attached to the same tank. (See, for example, JP-A-61-271019)

[0013]

[Problems to be solved by the device]

 The sterilizing power of ozone water is higher as the ozone concentration is higher and the contact time with ozone is longer. However, if ozone is a substance other than the target substance that can bind to oxygen, it binds to it and is consumed and consumed, so the ozone concentration around it decreases, so ozone or ozone gas is It is necessary to supply ozone water containing a large amount.

In order to dissolve a large amount of gaseous ozone in water, it is preferable that the ozone concentration be high and the pressure be high. Furthermore, it is better that the contact area with water is wider.

Generally, at 20 ° C. under atmospheric pressure, the ozone concentration of ozone water used for ordinary sterilization is about 1 to 2 ppm, and its saturation concentration is also about 5 ppm. Ozone water with a concentration of is not obtained.

When the object to be treated is added to this ozone water, the ozone is consumed and the concentration is lowered. In addition, it is said that the sterilization treatment with ozone water is ineffective because ozone is consumed due to various stains eluted from the object to be treated and the concentration is lowered.

When the object to be treated is particularly tuna meat or fresh fish, when it is sterilized with ozone water, ozone is consumed due to the fat contained in the meat, so that the concentration is high. Ozone is required, and a constant supply of ozone is required.

When such an object to be treated is immersed in ozone water for sterilization, proteins and dusts containing fats and organic substances of the object to be treated are eluted into the ozone water and are contaminated. There is a problem that this dirt wastes ozone and reduces its sterilization ability.

[0019]

[Means for Solving the Problems]

 Generally, the following is known as the amount of gas dissolved in a liquid. That is, the higher the concentration of the gas, the higher the pressure, and the larger the contact area between the gas and the liquid, the more gas can be dissolved in this liquid.

When the gas is ozone, it is possible to dissolve a larger amount of ozone and to retain a larger amount of ozone in the liquid when there is no substance that consumes ozone in the liquid.

The inventor of the present invention has arrived at the present invention as a result of extensive research on some novel structures for generating fine bubbles in a liquid.

In the present invention, the liquid taken into the pressurizing pump is supersaturated with ozone dissolved in a solution containing almost no ozone consuming substance, and fine ozone bubbles having a diameter of about 10 μm are dissolved in the solution. By generating it and suspending it in this solution, and continuously supplying it, the ozone is supplied not only in the solution but also in the surrounding ozone even when the object to be treated is immersed in ozone water. It is also supplied from fine bubbles.

When the ozone in the solution is consumed and the concentration decreases, the ozone gas floating as fine bubbles quickly dissolves in the solution, so that the ozone concentration of the solution is always high and the sterilizing power is increased. It is configured so that it can be maintained at a high price.

Further, waste water of floating ozone is consumed by arranging this solution, that is, a container for ozone water to escape the contaminated ozone water as waste water from the side opposite to the inlet where the ozone water flows. Can be reduced. Ozone water, which is this waste water, still has a sufficient sterilizing ability, so it can be used for applications such as primary washing of the object to be treated.

[0025]

【Example】

 An embodiment will be described below with reference to FIG. 1, which is a flow chart of the present invention. The high-concentration ozone gas generated by the ozone generator 10 is supplied to the gas suction port 14 of the pressurizing pump 12, and the water 18 is supplied from the water supply to the liquid suction port 16 to pressurize and mix them to obtain a high pressure. By dissolving ozone in the solution below and discharging it into the container 22 containing the solution under atmospheric pressure from the bubble-generating nozzle 20, the ozone is dissolved in a saturated state in the container 22 containing the material to be treated. The water was discharged to generate fine bubbles with ozone bubbles having a diameter of about 10 μm.

Since the minute bubbles have a very small volume, their buoyancy is also very small, and general bubbles (so-called bubble bubbles) immediately float on the surface of the solution, but for a few minutes. Since the solution remains in the solution for a relatively long time as described above, the solution becomes cloudy like milk.

The ozone water containing the bubbles in the cloudy state spreads in the solution 26 in the container 22 as if milk were dissolved in the water. The object 24 to be treated is immersed in the ozone water while continuously supplying the ozone water containing the fine bubbles to the container. Sufficient sterilization by supplying more than the amount of ozone consumed by the object to be processed by the liquid containing ozone dissolved in a saturated state and the liquid containing fine bubbles generated in a supersaturated state from the liquid containing ozone and the bubbles. The effect of can be improved.

On the other hand, the ozone water, which became a dirty solution with the progress of the sterilization treatment, was configured to be discharged out of the container as an excess liquid 28 from the upper part on the side opposite to the supply side of the ozone water.

In this embodiment, the raw material gas supplied to the ozone generator 10 is a PSA-type oxygen enrichment capable of concentrating oxygen in the air to a high concentration of about 95% (volume ratio, the same hereinafter). Although the oxygen gas generated by the vessel was used, other than this example, an oxygen gas from an oxygen cylinder capable of supplying approximately 100% oxygen or air containing approximately 21% oxygen may be used.

The higher the oxygen concentration of the raw material gas supplied to the ozone generator, the higher the ozone generation efficiency. Further, as long as the power is supplied, it is not necessary to replenish the cylinder or the like, and the high concentration oxygen gas can be continuously supplied. The oxygen concentrator used in this example is preferable as the source of the raw material gas to be supplied to the ozone generator because it can be generated.

Further, in the present embodiment, as a means for immersing the object to be treated 24 in the solution 26, a colander basket made of stainless steel material was used for manual work, but other than this, it is automatic and continuous. It may be a transportation means such as a belt conveyor that can pass through the solution 26.

[0032]

[Effect of the device]

 By carrying out the present invention, in the operation of sterilizing the object to be treated (mainly food and tableware) by immersing it in ozone water, there is no residual drug adhered to the object to be treated, and fresh ozone water is always supplied. Therefore, stable sterilization can be continuously performed for a long period of time.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining an ozone water sterilizer according to the present invention.

[Explanation of symbols]

 10 Ozone Generator 12 Pressurizing Pump 14 Gas Inlet 16 Liquid Inlet 18 Water 22 Container 24 Object to be Treated 26 Solution 28 Excess Liquid 30 Oxygen Concentrator

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C02F 1/78 9045-4D

Claims (3)

[Scope of utility model registration request] 1. An ozone water sterilizer comprising an ozone generator, a fine bubble generator composed of components including a pressure pump and a bubble generating nozzle, and a container for bringing an ozone water sterilizing liquid into contact with an object to be treated. In, a clean liquid is taken into this fine bubble generator, ozone gas generated by this and the ozone generator is inhaled and mixed, and a liquid in which ozone is dissolved from the bubble generating nozzle in the container and fine bubbles containing ozone. And sterilize or disinfect the object to be treated by bringing the ozone water sterilizing solution into contact with the object to be treated in this container. 2. The sterilizer according to claim 1, wherein in the ozone water sterilizer, water from a water supply is supplied as a clean liquid to be taken into the fine bubble generator. 3. The sterilizer according to claim 1 or 2, wherein a used solution used for sterilization or disinfection is configured to be discharged as an excess liquid from the container. .