JP2004305889A - Photocatalyst detoxifying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that activated carbon and manganese dioxide are each used as a decomposer for an ozone gas but show the drawbacks that the activated carbon may react with the ozone to generate heat and ignite, thus create a dangerous situation, and the manganese dioxide is soluble so that it cannot be used to decompose ozonized water. <P>SOLUTION: A photocatalyst detoxifying apparatus 1 to be provided uses an oxidized and activated titanium nonwoven fabric 11 as a photocatalyst, and applies to the decomposition of an ozone gas or ozone in ozonized water. According to the apparatus 1, a sample fluid coming in from a sample entrance 4a of a first resin lid 4 is decomposed by UV-rays having a wavelength of 400 nm or less and emitted from an ultraviolet lamp 6, and comes in contact with the oxidized titanium nonwoven fabric 11 excited by the UV-rays or an oxidized titanium pipe 10 to be further decomposed. Then the sample fluid detoxified through the decomposition processes is discharged from a sample exit 5b of a second resin lid 5. In this manner, ozone is efficiently decomposed regardless of a matter containing the ozone being a gas or liquid. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a photocatalyst abatement apparatus for a fluid such as ozone gas or ozone water.
[0002]
[Prior art]
In recent years, for example, ozone has been reviewed for its strong oxidizing power and characteristics of being easily decomposed into harmless oxygen, and is widely used in semiconductor liquid crystal, food, and medical industries as washing, sterilizing, and deodorizing. However, no matter how effective, even if air containing about 0.3 ppm of ozone continues to be inhaled for a long time, abnormalities may occur in the respiratory system, and if the concentration becomes higher than 100 ppm, it may die in just a few minutes. Cannot be ignored.
[0003]
Therefore, the used ozone must be quickly decomposed into harmless oxygen. However, at present, activated carbon or manganese dioxide is used as a decomposing agent in the case of ozone gas, and activated carbon is used in the case of ozone water (for example, Patent Document 1). ).
[0004]
[Patent Document]
JP-A-7-96153
[Problems to be solved by the invention]
As described above, there are activated carbon and manganese dioxide as decomposers of ozone gas. However, activated carbon reacts with ozone to generate heat and may ignite, which is dangerous. Further, manganese dioxide cannot be used for decomposing ozone water because it is soluble.
[0006]
The present invention has been made in view of such circumstances, and has as its object to provide a photocatalyst abatement apparatus that efficiently decomposes fluid such as ozone irrespective of gaseous or liquid state using a titanium oxide photocatalyst.
[0007]
[Means for Solving the Problems]
In order to solve the above problems and achieve the object, the present invention is configured as follows.
[0008]
According to the first aspect of the present invention, one end is fixed with a first resin lid having a sample inflow port through which a sample fluid flows, and at the other end, a test tubular hard glass or quartz glass tube is used as an inner tube. A hard glass, quartz glass, fluororesin or vinyl chloride resin container fixed with a second resin lid having an insertion port having an insertable inner diameter and a sample outlet for the sample fluid to flow out as an outer tube,
A photocatalyst abatement device for a fluid, wherein the inner tube is inserted from the insertion port and fixed, and further an ultraviolet lamp is inserted into the inner tube,
A photocatalyst abatement apparatus characterized in that a titanium nonwoven fabric whose surface is oxidized is disposed between the outer tube and the inner tube.
[0009]
The invention according to claim 2 is characterized in that the titanium nonwoven fabric has an elliptical donut shape and is arranged at an angle of 30 to 60 degrees with respect to the direction in which the sample fluid flows, and its outer periphery is the inner wall of the outer tube. , The inner circumference is in contact with the outer wall of the inner tube,
The photocatalyst abatement apparatus according to claim 1, wherein the sample fluid introduced passes through the titanium nonwoven fabric.
[0010]
The invention according to claim 3, wherein the titanium nonwoven fabric has a mesh of 50 to 100 μm and a density of 100 to 1000 g per square meter. Device.
[0011]
The invention according to claim 4 is a titanium pipe having an oxidized surface whose surface is obliquely cut at an angle of 30 to 60 degrees so that the outer periphery is in contact with the inner wall of the outer tube and the cut surface is in contact with the elliptical titanium oxide nonwoven fabric. The photocatalyst abatement device according to any one of claims 1 to 3, wherein the titanium catalyst nonwoven fabric is alternately inserted with the titanium nonwoven fabric.
[0012]
The invention according to claim 5 is capable of responding to an increase in the flow rate of the sample fluid or an increase in the concentration of the harmful substance by connecting a plurality of them in series or in parallel. A photocatalyst removal apparatus according to any one of the preceding claims.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a photocatalyst abatement apparatus of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to this embodiment. Further, the embodiments of the present invention show the most preferable embodiments of the present invention, and the meaning of the terms of the present invention is not limited thereto.
[0014]
FIG. 1 is a schematic configuration diagram of a photocatalyst removal apparatus, FIG. 2 is a diagram showing a titanium pipe, and FIG. 3 is a plan view of a titanium nonwoven fabric. The photocatalyst abatement apparatus 1 of this embodiment is applied to, for example, the decomposition of ozone in ozone gas or ozone water. This photocatalyst abatement apparatus 1 has an inner tube 2 and an outer tube 3.
[0015]
The outer tube 3 is fixed at one end 3a with a first resin lid 4 having a sample inlet 4a through which a sample fluid flows, and has an insertion port 5a having an inner diameter into which the inner tube 2 can be inserted at the other end 3b. It is fixed by a second resin lid 5 having a sample outlet 5b through which a sample fluid flows out. The sample fluid is a gas or a liquid.
[0016]
For the first resin lid 4 and the second resin lid 5, a fluororesin or a vinyl chloride resin is preferably used.
[0017]
The outer tube 3 is made of a hard glass, quartz glass, fluorine resin or vinyl chloride resin container.
[0018]
The inner tube 2 is inserted and fixed through the insertion opening 5 a, and further, an ultraviolet lamp 6 is inserted into the inner tube 2. The inner tube 2 is formed of a test tubular hard glass or quartz glass tube. A power cable 7 is connected to the ultraviolet lamp 6, and as the ultraviolet lamp 6, a mercury lamp or a cold cathode lamp is preferably used.
[0019]
The outer surface 10a is in contact with the inner wall 3c of the outer tube 3, and the cut surface is obliquely cut at an angle of 30 to 60 degrees so that the cut surface is in contact with the elliptical titanium nonwoven fabric 11. They are inserted alternately. In this embodiment, six titanium pipes 10 and six titanium nonwoven fabrics 11 are inserted.
[0020]
As described above, the titanium non-woven fabric 11 whose surface is oxidized is disposed between the outer pipe 3 and the inner pipe 2, and the titanium non-woven fabric 11 has an elliptical donut shape as shown in FIG. None, it is arranged at an angle θ of 30 to 60 degrees with respect to the direction in which the sample fluid flows, and its outer periphery 11 a is in contact with the inner wall 3 c of the outer tube 3, and its inner periphery 11 b is in contact with the outer wall 2 a of the inner tube 2.
[0021]
Thus, by inserting the titanium pipe 10 cut obliquely and the titanium nonwoven fabric 11 alternately, the titanium nonwoven fabric 11 can be fixed, the inner surface of the titanium pipe 10 also has a photocatalytic effect, and harmful ultraviolet rays are emitted. It also has the effect of preventing it from leaking out of the device.
[0022]
The oxidized titanium nonwoven fabric 11 functions as a filter because of its characteristic air permeability and water permeability, the sample fluid passing through the titanium nonwoven fabric 11 is uniformly contacted with the catalyst, and the titanium nonwoven fabric 11 has a light source. Since it is arranged at an angle of 30 to 60 degrees with respect to the lamp 6, the light receiving area of the titanium nonwoven fabric 11 is widened, and the photocatalytic action is performed efficiently and effectively.
[0023]
The introduced sample fluid permeates through the titanium nonwoven fabric 11. The titanium nonwoven fabric 11 has a mesh of 50 to 100 microns and a density of 100 to 1000 g per square meter.
[0024]
As described above, the catalyst efficiency increases as the surface area of the titanium nonwoven fabric 11 increases, but the efficiency increases within a limited volume. However, increasing the density of the titanium nonwoven fabric 11 or increasing the number of filters as the filter increases the resistance and causes a pressure loss, which is not preferable. Therefore, the density of the titanium nonwoven fabric 11 to be used is specified.
[0025]
The photocatalyst abatement apparatus 1 of this embodiment is applied to, for example, the decomposition of ozone in ozone gas or ozone water. The sample fluid entering from the sample inlet 4a of the first resin lid 4 is 400 nm from the ultraviolet lamp 6. It is decomposed by the following wavelengths, further decomposed by contacting the oxidized titanium nonwoven fabric 11 and the oxidized titanium pipe 10 excited by ultraviolet rays, detoxified, and discharged from the sample outlet 5 b of the resin lid 5. . In this embodiment, a titanium nonwoven fabric is used as a titanium oxide photocatalyst material.
[0026]
FIG. 4 shows an embodiment in which photocatalyst removal devices are connected in series. In this way, by connecting the photocatalyst abatement apparatuses 1 in series, it is possible to cope with an increase in the concentration of abatement substances.
[0027]
FIG. 5 shows an embodiment in which photocatalyst removal devices are connected in parallel. In this way, by connecting the photocatalyst removal apparatus 1 in parallel, it is possible to cope with an increase in the flow rate of the sample fluid.
[0028]
As described above, the concentration and amount of ozone in the sample fluid that requires detoxification treatment are various, and it is inefficient to perform treatment with one apparatus. And a shape that can be combined with the above device.
[0029]
【The invention's effect】
As described above, in the invention according to claim 1, a titanium nonwoven fabric whose surface has been oxidized is disposed between the outer tube and the inner tube, and the titanium oxide nonwoven fabric is used as a titanium oxide photocatalyst material. Contact efficiency was improved.
[0030]
According to the second aspect of the present invention, the titanium nonwoven fabric has a donut shape having an elliptical shape, is disposed at an angle of 30 to 60 degrees with respect to the flowing direction of the sample fluid, and its outer periphery is in contact with the inner wall of the outer tube. The inner periphery is in contact with the outer wall of the inner tube, and the sample fluid to be introduced is transmitted through the titanium non-woven fabric. Therefore, the light-receiving area of the titanium non-woven fabric is increased, and the photocatalytic action is performed efficiently and effectively. Miniaturization became possible.
[0031]
Also, the oxidized titanium nonwoven fabric has a function as a filter because of its characteristics of air permeability and water permeability, the sample fluid passing through the filter comes into contact with the catalyst evenly, and the filter is 30 minutes away from the light source lamp. Since they are arranged at an angle of up to 60 degrees, the light-receiving area of the titanium nonwoven fabric is widened, and the photocatalysis is efficiently and effectively performed, so that the device can be miniaturized.
[0032]
According to the third aspect of the present invention, the titanium nonwoven fabric has a mesh of 50 to 100 microns and a density of 100 to 1000 g per square meter, and the catalyst efficiency increases as the surface area of the titanium nonwoven fabric increases. However, the only way to increase efficiency within a limited volume is to increase the density of titanium non-woven fabric and increase the number of filters as filters. This is to prevent an increase in pressure loss.
[0033]
In the invention according to claim 4, a titanium pipe whose surface is oxidized is cut obliquely at an angle of 30 to 60 degrees so that the outer periphery is in contact with the inner wall of the outer tube and the cut surface is in contact with the elliptical titanium oxide nonwoven fabric. By alternately inserting the titanium nonwoven fabric, the titanium nonwoven fabric can be fixed, the inner surface of the titanium pipe also has a photocatalytic effect, and harmful ultraviolet rays can be prevented from leaking out of the device.
[0034]
In the invention according to claim 5, by connecting a plurality of samples in series or in parallel, it is possible to cope with an increase in the flow rate of the sample fluid or an increase in the concentration of the harmful substance, and ozone in the sample fluid that requires abatement treatment. Since the concentration and amount are various and processing with one apparatus is inefficient, it can be combined with a plurality of apparatuses according to the ozone concentration and amount in the sample fluid.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a photocatalyst abatement apparatus.
FIG. 2 is a view showing a titanium pipe.
FIG. 3 is a plan view of a titanium nonwoven fabric.
FIG. 4 is a diagram showing an embodiment in which photocatalyst abatement apparatuses are connected in series.
FIG. 5 is a diagram showing an embodiment in which photocatalyst removal devices are connected in parallel.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 photocatalyst removal device 2 inner tube 3 outer tube 4 first resin lid 4a sample inlet 5 second resin lid 5a insertion port 5b sample outlet 11 titanium nonwoven fabric 10 titanium pipe

Claims (5)

One end is fixed with a first resin lid having a sample inlet through which a sample fluid flows, and the other end is provided with an insertion port having an inner diameter into which a test tubular hard glass or quartz glass tube can be inserted as an inner tube. A hard glass fixed with a second resin lid having a sample outlet for the sample fluid to flow out, a quartz glass, a fluororesin or a vinyl chloride resin container as an outer tube,
A photocatalyst abatement device for a fluid, wherein the inner tube is inserted from the insertion port and fixed, and further an ultraviolet lamp is inserted into the inner tube,
A photocatalyst abatement device, wherein a titanium nonwoven fabric whose surface is oxidized is disposed between the outer tube and the inner tube. The titanium nonwoven fabric has a donut shape having an elliptical shape, is arranged at an angle of 30 to 60 degrees with respect to a flowing direction of the sample fluid, an outer periphery thereof is in contact with an inner wall of the outer tube, and an inner periphery is the inner tube. In contact with the outer wall of
The photocatalyst abatement apparatus according to claim 1, wherein the introduced sample fluid permeates through the titanium nonwoven fabric. The photocatalyst abatement apparatus according to claim 1 or 2, wherein the titanium nonwoven fabric has a mesh of 50 to 100 microns and a density of 100 to 1000 g per square meter. The outer periphery is in contact with the inner wall of the outer tube, and the cut surface is obliquely cut at an angle of 30 to 60 degrees so that the cut surface is in contact with the elliptical titanium oxide nonwoven fabric. The photocatalyst abatement apparatus according to any one of claims 1 to 3, wherein: The photocatalyst removal device according to any one of claims 1 to 4, wherein the plurality of devices are connected in series or in parallel to cope with an increase in the flow rate of the sample fluid or an increase in the concentration of the harmful substance. Harm device.

Images