JPH1085556A - Ozone decomposition device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decompose excess ozone without being adversely affected by moisture and mist by providing a dehumidifying bed prior to an ozone decomposition catalytic bed. SOLUTION: An intake aperture 12 for an excess ozone 11 is provided at the lower part of a decomposition tank main body 10, and an exhaust port 13 is formed at the top. Further, on the inner upper part of the decomposition tank main body 10, an ozone decomposition catalytic bed 14 filled with an ozone decomposition catalyst such as copper oxide or manganese oxide is provided. In addition, a dehumidifying layer 15 filled with a molecular sieve such as zeolite and a dehumidifying agent such as a desiccating agent is provided on the inner lower part as a preceding stage. In this ozone decomposition device, first the excess ozone is introduced from the dehumidifying bed 15 located at the lower part of the decomposition tank main body 10. Consequently, moisture and mist contained in the excess ozone are adsorbed and then the dry ozone flows into the ozone decomposition catalytic bed 14. Thus the ozone decomposition capability is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone decomposing apparatus for decomposing excess ozone generated in an ozone water producing apparatus and an ozone treatment system.

[0002]

2. Description of the Related Art In an ozone water production apparatus and an ozone treatment system, excess ozone after dissolving ozone in a solution such as water and causing a contact reaction is decomposed through an ozone decomposition apparatus filled with an ozone decomposition catalyst. .

FIG. 6 shows an outline of an ozone water producing apparatus, in which ozone gas 2 generated by an ozonizer or the like is mixed into treated water 1 and supplied to an ozone contact tank 3 where ozone water is produced. The surplus ozone 5 is supplied to an ozone decomposer 6, where the ozone is decomposed and made harmless and exhausted.

As shown in FIG. 7, the ozonolysis apparatus 6 forms an ozonolysis catalyst layer 9 filled with an ozonolysis catalyst in a decomposition tank main body 8, and the excess ozone 5 from the lower portion of the ozonolysis catalyst layer 9. To decompose ozone while ascending the catalyst layer 9 and exhaust 7 from above.

[0005]

The ozone decomposing catalysts include copper oxide and manganese oxide. However, excess ozone gas contains moisture and mist, which flows into the catalyst layer 9 as it is. In addition, moisture and mist due to dew condensation and scattering are mixed into the catalyst, which causes a problem that the ozone decomposing ability is lost.

Therefore, a heater is wound around the catalyst layer,
Although a method of raising the saturated vapor pressure by raising the temperature to prevent the steam in the catalyst from being saturated has been proposed, the apparatus becomes complicated, and electric power consumption of the heater is large and it is not economical.

Accordingly, an object of the present invention is to solve the above problems and to provide an ozone decomposer capable of decomposing surplus ozone without being affected by moisture and mist.

[0008]

According to a first aspect of the present invention, there is provided an ozone decomposition apparatus for decomposing excess ozone through an ozone decomposition catalyst layer, wherein a dehumidification layer is provided in front of the ozone decomposition catalyst layer. It is an ozonolysis device.

According to a second aspect of the present invention, an excess ozone inlet is provided at a lower portion of a decomposition tank main body, an exhaust port is provided at a top portion, and a moisture absorbing layer filled with a dehumidifier is provided at a lower portion of the decomposition tank main body. The ozone decomposition apparatus according to claim 1, wherein an ozone decomposition catalyst layer filled with an ozone decomposition catalyst is provided on an upper portion.

According to a third aspect of the present invention, a moisture absorption tank provided with a dehumidifying layer filled with a dehumidifying agent and a decomposition tank provided with an ozonolysis layer filled with an ozonolysis catalyst are connected in series, and excess ozone is supplied to the moisture absorbing tank. 2. The ozone decomposing apparatus according to claim 1, wherein excess ozone is supplied to the decomposition tank after flowing.

According to a fourth aspect of the present invention, a hygroscopic tank is connected in parallel before the decomposition tank, and excess ozone and regeneration dry air are alternately flowed to the inlet sides of the two hygroscopic tanks, and to the outlet side. 4. The ozone decomposing apparatus according to claim 3, wherein a switching means for supplying surplus ozone to the decomposing tank and exhausting dry air out of the system is connected.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows the basic structure of an ozone decomposing apparatus according to the present invention. In the figure, reference numeral 10 denotes a decomposition tank main body, in which an inlet 12 for excess ozone 11 is provided at a lower portion, and an exhaust port is provided at a top. 13 are formed.

An ozone decomposition catalyst layer 14 filled with an ozone decomposition catalyst such as a copper oxide type or a manganese oxide type is provided in an upper portion of the decomposition tank main body 10, and a molecular sieve such as zeolite is provided in a lower portion which is a former stage thereof. There is provided a dehumidifying layer 15 filled with a dehumidifying agent composed of a drying agent, a water absorbing agent and the like.

In this ozone decomposing apparatus, the excess ozone 11 passes through the dehumidifying layer 15 from the lower part of the decomposing tank main body 10, so that the moisture and mist in the excess ozone 11 are adsorbed and become the dry ozone to form the ozone decomposition catalyst layer. 14, the ozone decomposing ability is improved. In addition, the catalyst life is extremely long, and electric power such as a heater is not used, so that an inexpensive dehumidifier can be used, which is economical.

FIG. 2 shows a second embodiment of the present invention, in which a moisture absorbing tank 16 filled with a dehumidifying agent to form a dehumidifying layer 15 and an ozone decomposition catalyst layer filled with an ozonolysis catalyst are shown. The decomposition tank 17 in which the water vapor 14 is formed is separately formed, and the top of the moisture absorption tank 16 and the lower part of the decomposition tank 17 are connected by a line 18.
1 is formed, and the exhaust port 1 is provided at the top of the decomposition tank 17.
3 is formed. In this example, since the moisture absorption tank 16 and the decomposition tank 17 are formed separately, the dehumidifying layer 1
5, the capacity of the ozone decomposition catalyst layer 14, the speed of the excess ozone in the tank, and the residence time can be freely designed.

FIG. 3 shows a third embodiment of the present invention, in which moisture absorbing tanks 16a, 16b
Are connected in parallel, and the excess ozone 11 and the regenerating dry air 20 are alternately flown to the inlet sides of the two moisture absorbing tanks 16a and 16b, and the excess ozone 11 is supplied to the decomposition tank 17 at the outlet side, and the dry air is supplied. A switching means 22 for exhausting 21 out of the system 21 is connected.

The switching means 22 includes the moisture absorbing tanks 16a, 16
b three-way valves 23a and 23b connected to the inlet side of b.
And an outlet three-way valve 24a, 24b connected to the outlet side. The inlet three-way valve 23a, 23b is connected to the surplus ozone introduction line 25 and the regeneration dry air supply line 26, and the outlet three-way valve 24a , 24 b are connected to an ozone introduction line 27 and a dry air exhaust line 28 of the decomposition tank 17.

In this example, the switching means 22
Excess ozone 11 is flowed into one of the moisture absorption tanks 16a through, for example, an inlet-side three-way valve 23a, and dry air is passed through the inlet-side three-way valve 2
After flowing into the other moisture absorbing tank 16b through 3b, and in one moisture absorbing tank 16a, adsorbing the moisture in the excess ozone, it flows into the ozone decomposition tank 17 through the excess ozone introduction line 25 through the outlet three-way valve 24a. Decomposes ozone and exhausts 13
More exhaust. In addition, dry air is introduced into the other moisture absorption tank 16b from the regeneration dry air supply line 26 via the three-way valve 23b on the inlet side, and desorbs moisture adsorbed in the moisture absorbent by the dry air. Air is exhausted from the dry air exhaust line 28 through the side three-way valve 24b to regenerate the moisture absorbing tank 16b.

The switching between the moisture adsorption and desorption of the moisture absorbing tanks 16a and 16b is periodically performed by the switching means 22.

FIGS. 4 and 5 show an ozonolysis apparatus A of the present invention.
Fig. 4 shows an example of using a pool for purifying pool water.
FIG. 5 shows an example used for water purification and sewage treatment.

In FIG. 4, reference numeral 30 denotes a pool, and a circulation line 32 for circulating a pool water 31 is connected to the pool 30, and the hair catcher 3 is connected to the circulation line 32.
3. The circulation pump 34 and the filter 35 are connected.

The circulation line 32 is connected to a pool water purifier 37 for injecting ozone water 36 into the pool water 31.

The pool water purifying device 37 includes the ozone contact tank 3
8, a supply pump 39 for supplying the pool water 31 to the ozone contact tank 38, and an ozone decomposer A for decomposing excess ozone 11 from the ozone contact tank 38. The supply pump 39 is connected to the discharge side of the circulation pump 34. The ozone gas supply line 41 is connected to the circulation line 32 through the ozone gas supply line 41 to supply the pool water 31 containing ozone to the ozone contact tank 38.
Is supplied to the circulation line 32 on the suction side of the circulation pump 34 via the ozone water supply line 42.

Excess ozone 11 from the ozone contact tank 38
Is supplied to the ozone decomposer A, detoxified and exhausted.
Three.

FIG. 5 shows that treated water 42 such as purified water or sewage
The treated water 42 in the ozone contact tank 43 is introduced into the ozone contact tank 43 and blows out an ozone gas 45 from an air diffuser 44 provided below the ozone contact tank 43 to aerate with ozone. The process is shown, and the excess ozone gas after the aeration is introduced into the ozone decomposer A of the present invention to make it harmless and exhausted via the pump 47.

[0027]

In summary, according to the present invention, a moisture absorbing layer such as a molecular sieve is provided in front of the ozone decomposition catalyst layer to remove excess water in ozone, thereby reducing the decomposition ability and life of the ozone decomposition catalyst. With a simple system.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing another embodiment of the present invention.

FIG. 3 is a schematic diagram showing still another embodiment of the present invention.

FIG. 4 is a diagram showing a use mode of the present invention.

FIG. 5 is a diagram showing another use mode of the present invention.

FIG. 6 is a diagram showing an ozone water treatment system.

FIG. 7 is a view showing a conventional ozonolysis apparatus.

[Explanation of symbols]

 11 Surplus ozone 14 Ozone decomposition catalyst layer 15 Dehumidification layer

Claims (4)

[Claims] 1. An ozone decomposer for decomposing excess ozone through an ozone decomposition catalyst layer, wherein a dehumidification layer is provided in front of the ozone decomposition catalyst layer. 2. An excess ozone introduction port is provided at a lower portion of the decomposition tank main body, and an exhaust port is provided at a top portion. A hygroscopic layer filled with a dehumidifier is provided at a lower portion within the decomposition tank main body, and an ozone decomposition The ozone decomposition device according to claim 1, further comprising an ozonolysis catalyst layer filled with a catalyst. 3. A dehumidifying tank provided with a dehumidifying layer filled with a dehumidifying agent and a decomposing tank provided with an ozone decomposing layer filled with an ozonolysis catalyst are connected in series, and after flowing excess ozone into the desiccating tank,
The ozone decomposing apparatus according to claim 1, wherein excess ozone is supplied to the decomposing tank. 4. A hygroscopic tank is connected in parallel before the decomposition tank, and excess ozone and regeneration dry air are alternately flown to the inlet sides of the two hygroscopic tanks, and the excess ozone is discharged to the outlet side. 4. The ozone decomposer according to claim 3, further comprising a switching means for supplying the air to the system and exhausting the dry air out of the system.