JPS6377592A - Method and apparatus for treatment by ozone - Google Patents

Abstract

PURPOSE:To accelerate oxidation reaction by projecting ultrasonic waves and/or UV rays to a material to be treated while bringing ozone into dispersive contact or contact with said material, thereby cracking the ozone and generating excitation oxygen atoms. CONSTITUTION:The ultrasonic waves and/or UV rays are projected to the material to be treated while the ozone is brought into dispersive contact or contact therewith. For example, water 1 to be treated is fed through an ozone flow 3 and suction pipe part 4 from an ejector part 2 to a treatment tan 5. The ozone is dispersed into the water to be treated by the air flow dispersing and mixing effect of the ejector 2 and the ultrasonic effect, etc., to be described afterward in said pipe part 4. Furthermore, the dispersion of the ozone is accelerated by the ultrasonic waves from an ultrasonic oscillator 6 in the pipe part 4. The ozone, irradiated with the UV rays from a UV lamp 7, generates the excitation oxygen atoms, etc., to accelerate the reaction with the treated water. As a result, the decoloration, deodorization, sterilization or oxidation, etc., of the water to be treated by the ozone are efficiently executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for performing treatments such as decolorization, deodorization, sterilization, and oxidation using ozone.

[Conventional technology and its problems]

Conventionally, this type of device, for example, a treatment method using ozone to treat wastewater such as sewage or human waste as an aqueous sample, and the device introduces treated water from one side of the reaction tank and generates ozone from the other side (or the same direction). For example, an aeration method was used to cause the treated water and ozone to react by force-feeding an airflow containing ozone from a container.

The disadvantage of this is that: - Because the ozone does not come into sufficient contact with the treated water, it does not react sufficiently.As a result, unreacted ozone flows out, so a separate device is used to decompose the ozone at the rear to prevent secondary pollution. This made the equipment large and complicated, resulting in high costs. In addition, ■Since the reaction only involves ozone, the reaction (oxidizing power) may not be sufficient, and not only will the reaction not be sufficient, but also intermediate products (reaction intermediates, osinide compounds) will be generated, which will be discharged. There was a risk of secondary pollution.

On the other hand, as shown in Table 1, ozone can be used in a wide range of fields and applications, and has a fairly effective treatment effect, but the current equipment has high treatment costs and is uneconomical.

Table 1 [Structure of the invention] The present invention promotes the decomposition of ozone by irradiating ultrasonic waves and/or ultraviolet rays while dispersing or contacting ozone with the object to be treated, thereby generating excited oxygen atoms. This method and apparatus further promotes the oxidation reaction in combination with the dispersion effect when ultrasonic waves are irradiated.

Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a schematic cross-sectional view of an apparatus showing an example in which an ejector method is used to disperse an ozone stream into treated water.

The water to be treated 1 is sent to the treatment tank 5 through the suction pipe section 4 through the suction pipe section 4 with the ozone air flow S from the ejector section 2 .

In the pipe section 4, υ ozone is dispersed into the water to be treated by the airflow dispersion of the ejector section 2, the mixing action, the ultrasonic action described below, and the like.

The method for dispersing and mixing the ozone stream into the water to be treated may be any method as long as it has the effect of dispersing and blowing the ozone stream in the form of fine bubbles. For example, swirl flow type,
Full-surface aeration type, underwater stirring type, fine bubble injection type (
There is an ejector method).

Among these, the ejector method is effective in dispersion and subdivision and is preferred.

The tube section 4 is also equipped with an ultrasonic oscillator 6 and an ultraviolet lamp 7.

Here, the ozone dispersed in the treated water by the ultrasonic oscillator 6 is subjected to the action of ultrasonic waves, further promoting the dispersion effect.

The ozone dispersed in the water to be treated is decomposed by the ultraviolet rays from the ultraviolet lamp 7 and by the action of ultrasonic waves from the ultrasonic oscillator 6, producing excited oxygen atoms, etc., which are orders of magnitude more active than ozone, and the treatment Reaction with water is accelerated.

The frequency of the ultrasonic waves may be within a range that has an ozone dispersion effect and/or an ozone decomposition effect in the treated water. In general, those within the range of 10 to 000 KHz can be used, and usually preferably 30 to 500 KH
Ultrasonic waves having a frequency of approximately z are generated using a vibrator such as a magnetostrictive vibrator or a shell-shaped concave vibrator.

The ultrasonic frequency or oscillator depends on the processing method (reaction method),
It can be selected as appropriate depending on the type and structure of the device, desired economic efficiency, etc.

Ultraviolet lamps decompose ozone through ultraviolet irradiation,
Any device that generates ultraviolet rays with a wavelength that generates active excited oxygen atoms etc. may be used. Generally, a lamp having a wavelength peak at the absorption wavelength of ozone, for example 254 nm, is preferred.

Low-pressure mercury lamp (mercury vapor pressure 10''S~10''T
Orr) or a medium to high pressure mercury lamp may be used to simultaneously generate ozone and decompose ozone from an ozone air stream (0, containing) by irradiation with an ultraviolet lamp.

In this way, ozone gas 5 is dispersed in treated water 1,
Treated water can be treated quickly and easily using excited oxygen atoms generated from ozone and residual ozone.

The water to be treated that has been treated in the pipe section 4 is further slowly reacted in the treatment tank 5, whereby the treatment is sufficiently carried out.

The treated water is discharged from the outlet 8.

The example shown in FIG. 1 is an example in which ozone airflow dispersion, ultrasonic irradiation, and ultraviolet ray irradiation are all performed, and it is effective and most preferable to use these five types of effects in combination.

These three elements can be combined as appropriate depending on the type, structure, economic efficiency, etc. of the device. These are effective and produce practically preferable effects when used in combination of two or more.

Two combinations that are practically preferable are ozone airflow dispersion and ultraviolet diverting irradiation.

The example shown in Fig. 1 is an example in which the ultrasonic oscillation unit, ultraviolet irradiation unit, and ozone airflow supply unit are installed in the upper part of the processing tank 5. It goes without saying that the ultrasonic oscillator and ultraviolet irradiator may be installed underwater (underwater).

The liquid processing method has been explained above based on the drawings, but
The present invention can be used to decompose and remove harmful components or malodorous components contained in gas using ozone.

In addition, in the conventional manufacturing process, dirt adhering to semiconductor chips was removed using chemicals, solvents, etc., but now it is possible to remove dirt adhering to semiconductors by irradiating them with ultrasonic waves and/or ultraviolet rays while passing ozone-containing gas through them. It can be removed dry. Therefore, semiconductors are not damaged by chemicals, solvents, or the like.

Example 1 The ozone reactor shown in Fig. 1 (volume: 2 oz) was supplied with human urine at 101/mil, and an ozone (9°C 1.2%/air) airflow was sucked in using an ejector system, and ultrasonic and ultraviolet rays were emitted. Irradiation was performed, and the chromaticity, co'D, and leak ozone concentration of human waste were examined. In addition, an ozone air stream was supplied to the lower part of the ozone reactor through a diffuser tube, and the water in the lower part was subjected to ultrasonic oscillation and ultraviolet irradiation, and the same investigation was conducted.

These results are listed in Table-1.

Ozone injection rate: 25 W'19/1 Ultrasonic frequency: 200 KHz 〃 Vibrator: Spherical concave camera element Ultraviolet lamp: Low pressure mercury lamp, 20W Chromaticity of treated human waste (raw water): 450 #C! OD: 160~/l [Effects of the invention] 1. By irradiating ultrasonic waves and/or ultraviolet rays,
.

■ It decomposes ozone and generates active oxygen atoms, which are orders of magnitude stronger than ozone, allowing for rapid processing reactions.

■ Since the reaction is accelerated, there is no unreacted leak ozone, and a leak ozone treatment device for secondary pollution prevention is unnecessary, and the device can be made more compact.

■ Because the reaction occurs quickly, there is no generation or residue of intermediate reaction products, and sufficient processing can be performed.

By dispersing the ozone stream into the treated water using λ ultrasonic irradiation, ■ ozone was uniformly dispersed and subdivided into the treated water.

■ The reaction surface area of ozone to treated water has increased.

(5) By performing ultrasonic irradiation, ultraviolet ray irradiation, or a combination of both and dispersion of ozone airflow, the effects described in 1.2 can be mutually enhanced, making it possible to create an unprecedentedly highly efficient reaction device. Ta.

■ The effect of ozone has been increased and promoted, improving economic efficiency and practicality. In other words, although the efficiency of generating ozone itself (for example, using silent discharge) cannot be said to be sufficient, the utilization efficiency of ozone has increased considerably, so the effect is essentially the same as that of increasing the efficiency of ozone generation. Improved economy and practicality.

[Brief explanation of the drawing]

FIG. 1 shows a schematic cross-sectional view showing one example of the device of the present invention.

Claims (1)

[Scope of Claims] 1. A treatment method using ozone, which comprises irradiating an object with ultrasonic waves and/or ultraviolet rays while dispersing or bringing ozone into contact with the object. 2. The method according to claim 1, wherein the ozone airflow is dispersed by an ejector method. 3. The method according to claim 1 or 2, wherein ultrasonic waves having a frequency of 10 to 5,000 KHz are irradiated. 4. The method according to claim 1 or 2, which irradiates ultraviolet rays that include an absorption wavelength of ozone. 5. The method according to claim 4, wherein ultraviolet rays having a wavelength of 5,254 nm are irradiated. 6. An ozone treatment device comprising an ozone airflow dispersion section, an ultrasonic oscillation section, and/or an ultraviolet irradiation section.