JPH1085507A - Ozone separation and removal apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure decomposition of ozone by setting a gas pressure exhausted from an ozone separation chamber constant when the ozone is directed from ozonic water. SOLUTION: The ozone separation and removal apparatus 5 comprises a vessel 7 in a sealed state and an ozone decomposition device 8. When a hydraulic pressure is applied to rare water, ozonic water 10 entered from a water inlet 9 is ejected from an ejected part 11 at the upper portion of the vessel 7, wherein gas 12 is accumulated in the upper portion of the vessel 7, and water 13 from which the gas is released is accumulated in the lower portion of the vessel 7. A pipe opening 14 for discharging the gas 12 separated is provided on the top of the vessel 7, and the gas 2 passes through the pipe opening 14 and is introduced to the ozone decomposition device 8, where the ozone is decomposed and released, via a pressure regulating valve 15 interlocked with a float 16 installed in the inside of the vessel 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone separation and removal apparatus for continuously separating and removing ozone from an aqueous solution containing ozone. More specifically, the present invention relates to an ozone separation and removal apparatus that efficiently separates and removes ozone by changing the pressure balance in a container that ejects an aqueous solution containing ozone.

[0002]

2. Description of the Related Art Ozone is used for the purpose of sterilization, deodorization, decolorization, etc., in the field of water treatment such as water and sewage and wastewater treatment, in the semiconductor field such as ultra-precision dry cleaning and clean room sterilization, and in air conditioning such as sterilization and deodorization of air and filters. Field, surface treatment field such as oxidation before painting and bonding, material testing field using oxidizing power such as deterioration test of rubber, plastic and contact points of electrical equipment,
It is widely used in medical fields such as sterilization of surgical instruments, sterilization of medical waste, and deodorization.

[0003] Particularly, in the field of highly treated water for drinking water and highly-cleaning water, ozone is chemically unstable,
It has a strong oxidizing power when returning to oxygen, and is often used for instantaneously decomposing microorganisms such as bacteria, molds and algae, or organic substances that emit a bad smell. Further, it is useful because it has high reactivity with cations contained in water and can directly react with metal ions or partially coprecipitate to remove cations.

[0004] Among such various types of ozone use, there are two types of use of ozone in water: ozone gas, that is, gas phase ozone, and liquid ozone in which ozone gas is dissolved in water. There are two cases to use, and in both cases, the use of the strong sterilization, deodorization, and decolorization power of ozone is the same.

As a method for producing ozone water as liquid ozone, a method for producing ozone water at the bottom of an ozone-water contact reaction tank is described.
mm, a spherical glass filter with a pore diameter of about 45 to 50 μm, or a cylindrical porous ceramic ozone gas diffusion tube is installed, and the ozone generated from the ozonizer is sent to this, and the ozone gas bubbles are sent into the water to perform gas-liquid reaction. The method of making ozone water is known better than before,
In addition, there is a method in which ozone gas bubbles are sent from an ozonizer into a tube to cause a reaction.

Although ozone is useful for water treatment as described above, ozone is harmful to the human body when using ozone-treated raw water for drinking by providing an ozone mixing device for adding ozone to tap water or the like. Therefore, an ozone separation and removal device such as an ozone killer that removes excess ozone is provided to remove ozone gas from exhaust gas discharged from the ozone separation and removal device, and that treated water that has passed through the ozone separation and removal device does not contain ozone. Need to be.

[0007]

However, these separation devices such as an ozone separation and removal device and an exhaust ozone separation tower are:
It is generally large and complex, and is not compatible with small domestic water treatment systems. An object of the present invention is to efficiently remove excess ozone from water containing ozone discharged from an ozone mixing device by using an ozone separation and removal device that is small in size and efficient.

Therefore, the present invention degass ozone from ozone-containing water discharged from an ozone mixing device, and ejects ozone-containing water from an upper part of an ozone separation tank formed of a closed container into water and gas. To separate. The gas is discharged from the upper port of the container to the ozone decomposer via a valve, but the valve is a valve that operates with the movement of the float floating on the water of the container, so the gas pressure increases. When the gas pressure drops, the valve closes. As a result, a gas containing ozone at a constant pressure flows through the ozone decomposer, and the load on the ozone decomposer is kept constant to reliably decompose ozone contained in the gas.

On the other hand, the degassed water accumulates in the lower part of the ozone separation tank. The ozone slightly contained in the water is removed by an ozone removing member made of a member such as activated carbon provided between the outlet of the lower discharge pipe of the separation tank and the outlet of the separation tank, and becomes treated water containing no ozone. Thus, an object of the present invention is to provide an ozone separation and removal apparatus for removing ozone from water after ozone treatment.

[0010]

According to a first aspect of the present invention, there is provided an ozone separation and removal apparatus for continuously separating and removing ozone from an aqueous solution containing ozone.
The ozone separation and removal device is composed of an ozone separation tank and an ozone decomposer, and the ozone separation tank is formed of a closed container, and water containing ozone is sprinkled from the upper portion of the container into the container, and Is provided with a port for exhausting gas, a bottom is provided with a port for discharging separated water, and a valve is provided in a port flow channel for exhausting the gas, wherein the valve is It is characterized in that it is opened and closed as the float provided in the container moves up and down.

An ozone separation and removal apparatus according to a second aspect of the present invention is the ozone separation and removal apparatus according to the first aspect, wherein the ozone decomposing apparatus communicates with an inlet side of the ozone decomposing device via the valve that is linked to the float. It is characterized by being.

According to a third aspect of the present invention, there is provided an ozone separation and removal apparatus according to the first aspect, wherein a pressure sensor is provided in place of the float.

[0013]

FIG. 1 is a block diagram showing an example of a water treatment system in which an ozone separation device of the present invention is used. The ozone separation and removal device of the present invention is used as a part of the water treatment device. Is what you can do. Also, the ozone separation and removal device can be used in communication with an ozone mixing device associated with the ozone generator.

In FIG. 1, reference numeral 1 denotes a water pretreatment device made of activated carbon, hollow fiber, and ion exchange resin.
Is an ozone mixing device. The ozone 3 is ejected to the front part 4 of the ozone mixing device 2 by an ozone generator (not shown), and is dispersed or dissolved in raw water by the ozone mixing device.
Reference numeral 5 denotes an ozone separation and removal device according to the present invention, and reference numeral 6 denotes a post-treatment device such as a reverse osmosis membrane device. The ozone separation / removal device 5 according to the present invention is used in connection with the ozone mixing device 2. Therefore, except for the ozone mixing device 2 and the ozone separation / removal device 5, the ozone separation / removal device 5 may be added or removed for purposes such as water use. Can be.

As described above, the ozone separation and removal device 5 according to the present invention is used in communication with the water outlet of the ozone mixing device 2. By the way, in addition to the unreacted ozone, the water containing ozone discharged from the water discharge port of the ozone mixing device 2 includes air and oxygen conveyed together with ozone from the ozone generator, and the decomposition reaction of ozone inside the ozone mixing device 2. Contains oxygen, ozone generated by the reaction, and a substance formed by a reaction between an organic substance and the like. The gaseous substance containing the ozone and the scattered water droplets is hereinafter referred to as gas 12.

FIG. 2 is a diagram for explaining the configuration and operation of the ozone removing apparatus according to the present invention.

The ozone separation / removal device 5 comprises an ozone separation tank 7 (hereinafter referred to as a container) formed of a closed container and an ozone decomposer 8 in which a tubular container is filled with activated carbon and a heater is inserted.
Etc. In FIG. 2, the ozone mixing device 2
When the raw water is in a pressurized state by the ozone mixing device 2, that is, when the raw water is under water pressure, the water pressure of the same pressure is applied to the container 7 as well. I have. In this state, the water 10 containing ozone that has entered from the water inlet 9 is ejected from the ejection portion 11 at the upper part of the container 7. The ejection section 11 is for spraying the water 10 containing ozone in a mist state, and various known methods can be used. Here, the gas 12 accumulates in the upper portion of the container 7, and the water 13 that has released the gas 12 accumulates in the lower portion of the container 7.

Above the container 7, there is provided a pipe opening 14 for discharging the separated gas 12, and the gas 12 passes through this portion and is connected to a float 16 provided in the container 7 through a pressure adjusting valve 15 The ozone is decomposed and discharged by the ozone decomposer 8 through the ozone decomposer 8. That is, the valve 15 is a valve that operates by moving the float 16 up and down. Note that a filter for preventing the transfer of water droplets may be provided in the vicinity of the pipe opening 14. A water outlet 18 is provided at the bottom of the container 7, and the separated water 13 is discharged from the water discharge valve 17 through the ozone removing member 20. In addition, 19 is a drain valve.

When water 10 containing ozone is supplied from the water inlet 9 and the valves 15 and 17 are closed, the water 13 increases in the container 7 and the gas 12 is compressed. When the valve 17 is opened in this state, the water 13 decreases, and the pressure of the gas 12 decreases. That is, when the water 13 increases, the gas is compressed, and when the water 13 decreases, the gas is released from the compression.

Now, the gas 12 accumulated above the container 7 is
When compressed by the pressure of the water 13 that has released the gas 12, the float 16 rises to open the valve 15,
2 is sent to the subsequent ozonolysis tank 8. Conversely, when the water 13 in the container 7 decreases, the float 16 descends and closes the valve 15. As described above, a predetermined pressure is applied to the gas 12 in the use state of the apparatus, and the valve 15 repeatedly opens and closes at an equilibrium pressure according to the rise of the float 16. This means that the pressure of the gas 12 passing through the ozone decomposer 8 becomes constant, and the concentration of ozone in the gas 12 is considered to be almost constant. 8 can operate stably.

The ozonolysis device 8 comprises a cylindrical container,
Gas is sucked in from one end of the pipe, and gas is exhausted from the other end of the pipe. Activated carbon 21 is filled in a cylindrical container, and a heater 22 for heating is inserted therein. When the residual ozone comes into contact with the activated carbon 21, the residual ozone is absorbed and heated by the heater 22 to be completely decomposed and exhausted from the exhaust port 23. Ozone is completely decomposed because the pressure of the gas passing through the ozone decomposing device 8 is constant even if the composition of the gas 12 changes and the residual ozone concentration changes depending on the configuration of the ozone separator 7.

The half-life of ozone in water is orders of magnitude shorter than the half-life of gas-phase ozone. Normal temperature, neutral water is about several tens of minutes, but it is consumed by the reaction with water pH and temperature, trace organic and inorganic substances existing in the water, and its half-life becomes extremely short, in extreme cases May be in seconds.
As a result of dispersing the ozone-containing water 10 in the form of a mist, not only is the ozone-containing gas 12 and water 13 separated, but also as a result of the above, the separated water 13 is stored in the container. Almost no dissolved ozone is present. Furthermore,
Slight ozone is also removed by the ozone removing member 20 provided in the water outlet pipe channel.

[0023]

FIG. 3 shows a configuration in which the operation of the ozone separation and removal device can be automatically performed by a control device.

In FIG. 3, reference numeral 25 denotes a control device. The control device 25 can open and close and adjust the water inlet valve 26, the water discharge valve 17, the pressure adjustment valve 15, and the heater 22 in the container 7 in a systematic manner. it can.

For the pressure regulating valve 15, a regulating member 27 for regulating the float position and the opening of the valve 15 can be controlled. That is, the float position and the opening of the valve 15 can be freely changed as desired. As a result, when the concentration of the water containing ozone entering the container 7 greatly changes depending on the properties of the raw water, it is possible to perform optimal control.

FIG. 4 shows a case where the valve is controlled by using a sensor instead of the float.

As described with reference to FIG. 2, the float 16 opens and closes the valve 15 by the vertical movement of the water 13. When the float 16 rises, the pressure of the gas 12 increases, and conversely, when the float 16 descends, the pressure of the gas 12 decreases. Therefore, the valve 15 can be controlled using the sensor 28 that detects the pressure of the gas 12. Various commercially available pressure sensors can be used as the pressure sensor.

[0028]

As described above, according to the present invention, in order to degas ozone from water containing ozone, water containing ozone is ejected from the upper portion of the sealed container to separate water and gas.
The gas flows from the upper port of the container to the ozone decomposer, but the valve in the passage from the port to the ozone decomposer is a valve that operates with the movement of the float floating on the water in the container. The valve opens when the gas pressure increases and closes when the gas pressure decreases. As a result, a gas at a constant pressure flows through the ozone decomposing device, so that the ozone contained in the gas can be reliably decomposed,
Exhaust can be performed without ozone. The degassed water accumulates in the lower part of the ozone separation tank, and the ozone contained in this water is removed by an ozone removing member provided between the lower part of the separation tank and the outlet of the water discharge pipe, and water suitable for drinking, etc. Can be used as

The device has a simple structure, can be operated stably and safely, and can be provided not only as a small device usable at home, but also as a maintenance-free device for long-term use. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a system of a water treatment device in which an ozone separation device of the present invention is used.

FIG. 2 is a diagram illustrating the configuration and operation of an ozone separation and removal apparatus according to the present invention.

FIG. 3 is an explanatory view of an apparatus in which an operation of an ozone separation and removal apparatus according to the present invention can be automatically performed by a control device.

FIG. 4 is a diagram according to the present invention, in which a valve is controlled by a sensor instead of a float.

[Explanation of symbols]

 Reference Signs List 5 ozone separation and removal device 7 container (ozone separation tank) 8 ozone decomposer 11 ejection part 12 gas 13 water 15 pressure regulating valve 16 float 25 control device 27 regulating member 28 sensor

Claims (3)

[Claims] 1. An ozone separation and removal apparatus for continuously separating and removing ozone from an aqueous solution containing ozone, wherein the ozone separation and removal apparatus comprises an ozone separation tank and an ozone decomposer, and the ozone separation tank is a closed vessel. Formed from the container, water containing ozone is sprinkled into the container from the upper part of the container, and a pipe port for exhausting gas is provided at the upper part of the container,
In addition, a pipe port for discharging separated water is provided at the bottom, and a valve is provided for a pipe channel for exhausting the gas,
The ozone separation and removal apparatus, wherein the valve is opened and closed as a float provided in the container moves up and down. 2. The ozone separation and removal apparatus according to claim 1, wherein the ozone decomposer communicates with an inlet side of the ozone through the valve that is linked to the float. 3. An ozone separation and removal apparatus according to claim 1, wherein a pressure sensor is provided in place of said float.