JPH07195066A - Liquid treating method and device - Google Patents

Abstract

PURPOSE:To provide a liquid treating method and a liquid treating device enabling to remove foreign matters and an organic harmful substance. CONSTITUTION:Ozone and active oxygen are mixed into the water 1 which is the liquid to be treated at a reaction tank 4 and the organic harmful substance contained in the water 1 is chemically converted to a low toxic substance and then the water 1 is passed through a liquid treating part 22 having a fiber filter and a treating part 23 having activated charcoal, thus it is filtered and the foreign matters incorporated in the water 1 are removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid treatment method and apparatus, and more particularly to a technique effective when applied to industrial or household water purification treatment.

[0002]

2. Description of the Related Art Water purification technology has become increasingly important in recent years in order to obtain water purification required for cleaning processes and drinking water in the manufacturing process of precision products such as semiconductor manufacturing technology.

As the water purification apparatus, it is conceivable that a fiber filter or activated carbon or a combination thereof is adopted, and foreign matter and residual chlorine in water are reduced or removed by the fiber filter and the activated carbon. Can be considered.

[0004]

However, industrial water, tap water, etc. may contain organic harmful substances, but depending on the fiber filter or the activated carbon in the purification treatment device, It has been found that there is a problem that organic harmful substances contained in water cannot be completely removed.

More specifically, in the purification treatment using the fiber filter or the activated carbon in the purification treatment device described above, water is purified by physical means and chemical means of adsorption. is there. But,
The present inventor said that harmful organic substances such as trihalomethane are difficult to be completely removed by physical means such as the fiber filter or activated carbon, and need to be performed by a chemical treatment. We found a problem with the purification process.

One object of the present invention is to provide a liquid treatment method capable of removing foreign substances and organic harmful substances.

Another object of the present invention is to provide a liquid processing apparatus capable of easily removing foreign substances and organic harmful substances.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0009]

The typical ones of the inventions disclosed in the present invention will be outlined below.

According to the first aspect of the present invention, ozone and active oxygen are mixed in a liquid to be treated to convert an organic harmful substance contained in the liquid into a low-toxic substance. By passing the liquid through a fiber filter and activated carbon, foreign substances and impurities contained in the liquid are removed.

[0011]

According to the above-mentioned means, the organic harmful substance contained in the liquid to be treated is converted into a low-toxic substance by the chemical action using ozone and active oxygen. The low-toxic substance and foreign substances and impurities contained in the liquid are removed by a physical action such as filtration and a chemical action such as adsorption by passing the liquid through a fiber filter and activated carbon. You can

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. In all the drawings for explaining the embodiments, those having the same function are designated by the same reference numerals, and a duplicate description will be omitted.

FIG. 1 is a schematic view showing a liquid processing method and a liquid processing apparatus used therefor according to an embodiment of the present invention. Further, FIGS. 2 to 4 are schematic views showing main processing units in the liquid processing apparatus. A specific technique of the liquid treatment of the present invention will be described with reference to FIG.

As shown in FIG. 1, in a liquid processing apparatus according to an embodiment of the present invention, water 1 as a liquid to be processed is injected through an inlet 2 and is made to flow into a reaction tank 4 through a liquid passage 3. .

An ozone generator 5 is connected to the reaction tank 4 through a gas passage 6, and gaseous oxygen is supplied from an oxygen cylinder or the like connected to the gas inlet 7 of the ozone generator 5. 8 is injected and the oxygen 8 is subjected to plasma discharge treatment in the ozone generator 5 and decomposed to form ozone and active oxygen. The mixed gas of ozone and active oxygen is introduced into the reaction tank 4 through the gas passage 6.

As shown in FIG. 2, the reaction tank 4 has a liquid passage 3 for supplying water 1 as a liquid to be treated and a gas passage for bubbling by supplying a mixed gas 9 containing ozone and active oxygen. 6 and.

Further, in the figure, 10 is a gas passage connected to an ozone decomposer 11 to be described later, 12 is a valve, and if necessary, gas generated by the reaction tank 4 and unreacted ozone. It has a function of removing gas such as.

Further, 3 is a liquid passage connected to an ozone decomposer 11 which will be described later, 13 is a liquid passage having a valve 14, and the liquid in the reaction tank 4 is passed through the valve 14 if necessary. It is used when removing.

Further, in the reaction tank 4, water 1 as a liquid to be treated flows from the liquid passage 3 and is accumulated therein, and a fixed amount of the water 1 is stored in the water 1. 9 is introduced through the gas passage 6 and the mixed gas 9 is bubbled to chemically decompose harmful organic substances contained in the water 1 to form a low-toxic substance. I have.

The ozone and active oxygen have a strong oxidizing power, and react with organic harmful substances such as trihalomethane mixed or dissolved in the water 1 to be treated to have low toxicity. Has the effect of forming. Further, it has a bactericidal action on biological substances such as microorganisms contained in the liquid 1 to be treated. In this embodiment, water 1 is used as the liquid as the liquid to be treated, but the present invention is also applicable to a mode in which a liquid containing an organic substance or a biological foreign substance is subjected to a cleaning treatment. It is possible.

Water 1, which is the liquid to be treated, which has been treated in the reaction tank 4, is introduced into the ozonolysis unit 11. As shown in FIG. 3, the ozone decomposing unit 11 has a bent gas passage 1 in a region surrounded by a heater 15.
0 and the liquid passage 3, and the gas in the gas passage 10 and the liquid in the liquid passage 3 are heat-treated by the heater 15.

The ozone decomposing unit 11 thermally decomposes the unreacted ozone dissolved in the water 1 as the liquid to be treated introduced therein to render it harmless, and then only the gas component generated by the thermal decomposition is generated. The gas is introduced into the gas passage 17 through the degassing valve 16 and discharged from the outlet of the gas passage 10 to the atmosphere.

Gases such as ozone and unreacted ozone such as active oxygen bubbled in the reaction tank 4 are introduced into the ozone decomposer 11 to thermally decompose the unreacted ozone to detoxify it. After that, the gas is discharged to the atmosphere from the outlet of the gas passage 10.

Since the water 1 as the liquid to be treated has been heated by the ozone decomposer 11, the temperature is lowered to the room temperature by the heat exchanger 18, and then the liquid treatment portion 22 having the fiber filter and the activated carbon are removed. Foreign substances and impurities are filtered through the processing unit 23 included therein, and water is sent to the water outlet.

The heat exchanger 18, as shown in FIG.
A distorted heat exchange liquid passage which is connected to the ozone decomposer 11 through a liquid passage 19 and has a function of lowering the temperature of the water 1 to be treated heated by the ozone decomposer 11 to room temperature. It has 20. Further, water 1 which is a liquid to be treated and is heated in the reaction tank 4 is connected to the reaction tank 4 through a liquid passage 3.
It has a distorted heat exchange liquid passage 21 having a function for introducing.

Further, the liquid processing apparatus in this embodiment is
As shown in FIG. 1, a switching valve 24 that regulates and controls the flow of liquid and a bypass liquid passage 25 connected to the switching valve 24 are provided. Further, in the figure, reference numeral 26 denotes a connecting portion which connects the respective liquid passages.

By operating the switching valve 24, the water 1 as the liquid to be treated can be made to flow out to the liquid outlet as unpurified water.

By operating the switching valve 24, the purification process using the chemical action of ozone and the active oxygen of the liquid 1 to be treated can be omitted, and the filtration process which is the physical action. It is possible to employ only the treatment for purifying water through the liquid treatment section 22 having the fiber filter for performing the above and the treatment section 23 having the activated carbon which has a chemical action in addition to the physical action.

Further, by operating the switching valve 24, the water 1 to be treated is heated without being passed through the heat exchanger 18 while being heated by the ozone decomposing unit 11, thereby heating the liquid. Water, which is the liquid to be treated in the treated state
You can also get

As described above, the liquid treatment apparatus according to the present embodiment combines the chemical action using ozone and active oxygen with the physical action using the fiber filter and activated carbon to perform liquid purification such as water purification treatment. Is to be processed.
Therefore, by using ozone and active oxygen, organic substances in water are chemically decomposed, and thus organic substances can be removed.

Further, in the liquid processing apparatus of this embodiment, when ozone and active oxygen are produced, a large amount of the gas can be easily produced by plasma discharge, and the ozone and active oxygen can be stored in a liquid such as water. By bubbling, a harmful organic substance contained in the liquid to be treated such as water is chemically reacted. Therefore,
It is possible to easily decompose the organic substance into a low-toxic substance and remove harmful organic substances from the liquid to be treated such as the water.

The liquid treatment technology of the present embodiment is an industry for obtaining a liquid treatment technology for household drinking water, a washing step in the manufacturing process of precision products such as semiconductor manufacturing technology, and purified water required for drinking water. It can be applied to liquid processing technology. In addition, it can be incorporated as a water storage tank or water tank or a sewage treatment facility, applied as a unit, and used as a liquid treatment system.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Needless to say.

[0034]

The effects obtained by the typical ones of the inventions disclosed by the present application will be briefly described as follows.
It is as follows.

According to the present invention, the liquid to be treated is
After mixing ozone and active oxygen to convert organic harmful substances contained in the liquid into low-toxic substances, the liquid is passed through a fiber filter and activated carbon to be contained in the liquid. Since it removes foreign substances and impurities that are present, organic harmful substances contained in the liquid to be treated are converted into low toxicity substances by the chemical action of ozone and active oxygen. Therefore, the foreign substances and impurities contained in the low-toxic substance and the liquid are caused by the physical action such as filtration and the chemical action such as adsorption by passing the liquid through the fiber filter and the activated carbon. Can be removed.

Further, in the liquid processing technique according to the present invention, ozone and active oxygen can be easily produced in a large amount, and the organic substance and various substances contained in the liquid to be treated can be produced by a simple method using the ozone and the active oxygen. Foreign objects can be removed with a compact device.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a liquid processing method and a liquid processing apparatus used therefor according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a reaction tank in the liquid processing apparatus which is an embodiment of the present invention.

FIG. 3 is a schematic view showing an ozone decomposer in a liquid processing apparatus which is an embodiment of the present invention.

FIG. 4 is a schematic view showing a heat exchanger in the liquid processing apparatus which is an embodiment of the present invention.

[Explanation of symbols]

 1 Water 2 Inlet Port 3 Liquid Passage 4 Reaction Tank 5 Ozone Generator 6 Gas Passage 7 Gas Inlet Port 8 Oxygen 9 Mixed Gas 10 Gas Passage 11 Ozone Decomposing Device 12 Valve 13 Liquid Passage 14 Valve 15 Heater 16 Gas Venting Valve 17 Gas Passage 18 heat exchanger 19 liquid passage 20 heat exchange liquid passage 21 heat exchange liquid passage 22 liquid treatment unit 23 treatment unit 24 switching valve 25 liquid passage 26 connection unit

Claims (6)

[Claims] 1. A liquid that is a liquid to be treated is mixed with ozone and active oxygen to convert an organic harmful substance contained in the liquid into a low-toxic substance, and then the liquid is mixed with a fiber filter and A liquid treatment method, characterized in that foreign matter and impurities contained in the liquid are removed by passing activated carbon. 2. A liquid which is a liquid to be treated is mixed with ozone and active oxygen to convert an organic harmful substance contained in the liquid into a low-toxic substance and then remains in the liquid. A method for treating a liquid, characterized in that a treatment for removing the ozone that is present is performed by thermal energy, and then the liquid is passed through a fiber filter and activated carbon to remove foreign matters and impurities contained in the liquid. 3. The liquid processing method according to claim 1, wherein water is used as the liquid, and bubbling is used to mix the ozone and the active oxygen into the liquid. 4. A reaction tank for reacting an organic harmful substance contained in a liquid which is a liquid to be treated with ozone and active oxygen, and is connected to the reaction tank through a gas passage and a liquid passage, An ozone decomposer that decomposes ozone contained in the liquid that is the liquid to be treated and unreacted ozone in the reaction tank, a processing unit that has a fiber filter that filters the liquid that is the liquid to be treated, and A liquid treatment apparatus comprising: a treatment unit that filters a liquid that is a treatment liquid and that further has activated carbon that adsorbs impurities in the liquid. 5. A reaction tank for reacting an organic harmful substance contained in a liquid which is a liquid to be treated with ozone and active oxygen, and the reaction tank is connected through a gas passage and a liquid passage, An ozone decomposing device that decomposes ozone contained in the liquid that is the liquid to be treated and unreacted ozone in the reaction tank, and the liquid that is the liquid to be treated that is derived from the ozone decomposing device to a predetermined temperature. A heat exchanger to be adjusted, a processing unit having a fiber filter that filters the liquid that is the liquid to be treated, a liquid filtering unit that is the liquid to be treated, and a treatment unit that has activated carbon that adsorbs impurities in the liquid. A liquid processing apparatus comprising: 6. An ozone generator for producing ozone and active oxygen using oxygen as a raw material; an organic toxic substance contained in a liquid which is a liquid to be treated and which is connected to the ozone generator; A reaction tank for reacting ozone and active oxygen, which is connected to the reaction tank through a gas passage and a liquid passage, removes ozone contained in the liquid as the liquid to be treated and unreacted ozone in the reaction tank. An ozone decomposer that decomposes, a heat exchanger that adjusts the liquid, which is the liquid to be treated, drawn out from the ozone decomposer to a predetermined temperature, and a processing unit having a fiber filter that filters the liquid that is the liquid to be treated And a treatment unit having an activated carbon that filters the liquid that is the liquid to be treated and that adsorbs impurities in the liquid.