JP2003071213A - Method for producing filter raw material, method for producing photocatalytic filter raw material, photocatalytic filter, and photocatalytic filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently mass-produce homogeneous linear products to the peripheries of which lots of granules are adhered. SOLUTION: An adhesion method for making quartz glass balls 3 be adhered to the periphery of each of numbers of glass fibers has a pretreatment process for forming a mixture in which lots of quartz glass balls 3 exist among a plurality of glass fibers 1, and an adhesive 4 exists between the glass fiber 1 and the quartz glass ball 3 and an adhesive curing process for drying or curing the adhesive while the glass fibers 1 are moved relatively to each other by applying acceleration movement such as vibration and swinging to the mixture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a filter material and a method of manufacturing a photocatalyst filter material, in which particles are adhered to the surfaces of a large number of linear objects, and
The present invention relates to a photocatalytic filter and a photocatalytic filter device.

[0002]

2. Description of the Related Art In recent years, a photocatalyst such as titanium dioxide is formed on the surface of a light-guided linear or fibrous filter material,
A large number of these are bundled so that a predetermined gap is formed between them to form a filter bundle, and the fluid to be treated is circulated through the gaps inside the filter bundle, and the contaminants contained in the fluid to be treated are treated on the surface of each filter material. A photocatalyst filter is proposed in which light is introduced into each photocatalyst filter material and is decomposed by a photocatalytic action by capturing light into each photocatalyst filter material (see, for example, JP-A-9-225262). .

In the photocatalytic filter as described above,
It is important to form an appropriate gap between the linear or fibrous filter materials and, at the same time, to make the surface of the filter material as rough as possible so that contaminants can be easily captured. This point is the same for ordinary filters other than the photocatalytic filter.

As a method for forming irregularities on the surface of a linear or fibrous filter material, a method of adhering a large number of granular materials having an appropriate particle size to the surface of the linear or fibrous material can be considered.

[0005]

However, the fact is that a suitable method for making a filter material by adhering a large number of particles having an appropriate particle size to the surface of a linear or fibrous material has not yet been developed. Is. Further, in order to use it as a filter material, a large amount of a linear material or the like to which a large number of granular materials are adhered is required. Therefore, it is necessary to quickly adhere a large number of particles to each of a large number of linear objects.

As a method therefor, for example, it is considered that a large number of linear objects are bundled, a large number of granular materials are present between them to supply an adhesive, and then the individual linear objects are divided and cured. . However, in this method, when the bundle is released and divided into individual linear objects, a linear object in which a large amount of particulate matter adheres and a linear object in which almost no particulate matter adheres are formed, and a uniform filter is formed. It turns out that the material cannot be manufactured.

The present invention has been made under the above-mentioned background, and mass-produces a filter material and a photocatalytic filter material composed of a homogeneous linear material in which a large number of particles are adhered on the surface with high productivity. An object of the present invention is to provide a method of manufacturing a filter material, a method of manufacturing a photocatalyst filter material, and a high-performance photocatalyst filter and a photocatalyst filter device that can be manufactured.

[0008]

As a means for solving the above-mentioned problems, the method of manufacturing a filter material according to the present invention is to manufacture a large number of filter materials in which a large number of particles are adhered to the surface of a linear object. In the method, a large number of particles having a diameter smaller than the diameter of the linear object are present between the large number of linear objects, and an adhesive is interposed between the linear objects and the granular objects. A pretreatment step of forming a mixture, and by applying an accelerating motion such as vibration or shaking to the mixture to dry or cure the adhesive while allowing the linear objects to move relative to each other. And an adhesive agent curing step in which the granular material is superposed on the surface of the linear object in a plurality of stages and is adhesively fixed in an island shape.

The method for producing a photocatalytic filter material according to the present invention is a method for adhering a large number of glass spheres to the surface of a glass fiber and producing a large number of photocatalytic filter material on the surface, wherein A pretreatment step of forming a mixture in which a large number of glass spheres having a diameter smaller than the diameter of the glass fiber are interposed and an adhesive agent is interposed between these glass fibers, and the mixture is vibrated or shaken. The glass spheres are stacked on the surface of the glass fiber in multiple stages by drying or curing the adhesive while applying an accelerating motion of the glass fibers so that the glass fibers move relatively to each other. And an adhesive curing step for adhesively fixing the adhesive to the.

In the photocatalyst filter according to the present invention, a large number of glass spheres are adhered to the surface of a glass fiber, and a large number of photocatalyst filter materials having a photocatalyst formed on the surface are bundled to form a gap between the photocatalyst filter materials. To form a filter bundle having a to-be-processed fluid introduced from one end surface of the filter bundle to trap contaminants contained in the to-be-processed fluid on the surface of each filter material, and to each photocatalytic filter material. A photocatalytic filter that introduces light to decompose the trapped contaminants by a photocatalytic action, wherein the glass sphere has a diameter smaller than that of the glass fiber, and a plurality of glass spheres are provided on the surface of the glass fiber. It is characterized in that it is piled up in steps and is adhesively fixed in an island shape.

A photocatalyst filter device according to the present invention has a photocatalyst filter, a filter case body for accommodating the photocatalyst filter, and flange portions provided on both sides of the filter case body, and the flange on the one side. An inlet for the fluid to be treated is provided on the side portion of the portion, an outlet for the fluid to be treated is provided on the side portion of the flange portion on the other side, and the front portion of the flange portion on the one side is A glass window for making light incident on the photocatalytic filter is provided, and the photocatalytic filter according to claim 3 is used as the photocatalytic filter.

A method of manufacturing a filter material according to the present invention,
The following is a description of specific examples. First, in the above-mentioned pretreatment step, a large number of glass fibers (light-guiding linear objects) and a necessary amount of quartz glass spheres (light-guiding particles) are mixed in the adhesive liquid to form a quartz glass. Hold the sphere between the glass fibers, scoop up the glass fibers in the same longitudinal direction, and apply a compressive force to the glass fiber bundle so that the silica glass spheres and adhesive liquid do not spill and maintain this state. .

In addition to this, in the above-mentioned pretreatment step, a method in which the glass fiber and the quartz glass sphere are first mixed and the adhesive liquid is permeated into the gap may be used. in this way,
First, a glass fiber and a quartz glass sphere are mixed in air. At that time, a method of lowering the humidity of the atmosphere and causing the quartz glass spheres to cling to the glass fiber by static electricity is useful. Then, to prevent the silica glass spheres from spilling from the glass fiber, collect the glass fibers in the same direction, apply a compressive force in a bundle, and bring the adhesive liquid into contact with the lower part of the bundle. The phenomenon of penetrating into the mesh-like capillaries formed with glass spheres is used. Alternatively, a method may be used in which the glass fiber, the quartz glass sphere and the adhesive liquid are put in a container and stirred.

As described above, the silica glass balls and the adhesive liquid can be contained in the bundle of glass fibers. It is desirable that the quartz glass sphere and the adhesive liquid are uniformly mixed with the glass fiber.

Next, in the above adhesive curing step, the glass fibers, the glass balls, and the mixture of the adhesive are subjected to accelerated motion such as vibration or rocking so that the glass fibers are relatively moved. Meanwhile, it is a step of drying or curing the adhesive.

By this adhesive curing step, a large number of quartz glass spheres attached to each glass fiber are
While being bonded to each glass fiber, quartz glass spheres that are bonded to any glass fiber and quartz glass spheres that are bonded to other glass fibers adjacent to this glass fiber should not be bonded. Is possible.

In this case, after the curing in the adhesive curing step described above, it is relatively easy to provide a portion where the particles (quartz glass spheres) are laminated and laminated in a plurality of stages. In particular, when the diameter of the granular material is smaller than the diameter of the linear material, this can be easily done. This point is
It has the following meanings.

That is, when the diameter of the granular material is as large as the diameter of the linear material, it is extremely difficult to bond it to the linear material. However, for example, in a filter configured by bundling a large number of linear filter materials,
There is a case where it is desired to secure a gap of a predetermined size or more between the linear filter materials. In such a case, in order to secure the large gap, it becomes necessary to adhere a granular material having a large diameter to the surface of the linear object. In such a case, instead of adhering the large-diameter particles, the same action and effect can be obtained by adhering the small-diameter particles in a multi-layered manner, and the above means (adhesion curing step) is extremely useful. Is.

In particular, when the diameter of the granular material is smaller than the diameter of the linear material, after the curing in the adhesive curing step described above, a portion in which the granular material is laminated and adhered in a plurality of stages is formed. It is considered that this is due to the following actions. First, when the diameter of the granular material is at the same level as the linear material, even if the granular material is attempted to be bonded to the linear material, the contact between the linear material and the granular material is point bonding, so that there is no adhesive strength, The particles fall off easily, and adhesion is extremely difficult.

On the other hand, when a plurality of small-diameter particles are formed into a lump, the adhesive area between the particles and the linear object is increased, the adhesive strength is increased, and the particles can be bonded. As a result, it is possible to adhere a plurality of stages of granular materials, and when the linear objects to which a plurality of stages of granular materials are adhered are bundled, it is possible to form a desired gap between the linear objects.

In order to bond a plurality of small-diameter particles in multiple stages, a large number of particles are interposed between a large number of linear objects, and a mixture in which an adhesive is present between the linear objects and the particles is used. Let it form. Thereby, these mixtures adhere integrally due to the surface tension of the adhesive and the capillary phenomenon.

Since the mass of the linear material is much larger than the mass of the granular material, the adhesive force required to maintain the adhesion is such that when the adhesive amount is small, the adhesive force of the linear object is It is much larger than that of granules. By applying an accelerating motion such as rocking or the like perpendicularly to the longitudinal direction of the linear material having a large adhesive force, the linear material and the granular material are subjected to compressive and tensile forces. At the same time, when the adhesive is dried by blowing hot air or the like, the amount of the adhesive is reduced and its adhesive force is reduced. Then, the bundle of linear objects with the particles interposed therebetween is separated from the granular objects between the linear objects where the strongest adhesive force is required to maintain the adhesion.

Further, when accelerated drying such as shaking is applied and hot air is blown to dry the adhesive, the amount of the adhesive decreases, and when the adhesive is cut off, the particulate matter remaining on the surface of the linear material is Only lumps formed by a structure having a strong adhesive force such as a lattice structure remain. Further, when the adhesive is dried and the adhesiveness is increased with the increase in viscosity, the granular material adhered in a lump is adhered to the surface of the linear object.

Since the linear object has a small wire diameter, it is vulnerable to a local load in a direction perpendicular to the longitudinal direction, an impact (bending), and a twist. To prevent this, put linear and granular materials in a rectangular parallelepiped-shaped container, limit the degree of freedom of the linear objects to the direction perpendicular to the longitudinal direction, and accelerate the rocking in the direction perpendicular to the longitudinal direction. By exercising, it is possible to realize the bonding without breaking the linear object.

In order to increase the number of stacks of particles, the amount of particles intercalated between linear objects is increased. To decrease the number of stacks, the amount of particles between linear objects is reduced. Further, the amount of swing (width of swing, speed, number of swings, etc.) is increased. Shaking conditions, drying conditions (hot air temperature, air volume, time, etc.)
By decomposing these into parameters and mechanizing these parameters, reproducible conditions can be easily created. As a result, it becomes possible to mass-produce a plurality of small-diameter particles that are bonded to a linear object in multiple stages.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 is an explanatory view of a method for producing a photocatalytic filter material of Embodiment 1 according to the present invention. Hereinafter, the manufacturing method of the photocatalytic filter material according to the first embodiment will be described with reference to FIG. 1, and the manufacturing method of the photocatalytic filter material, the photocatalytic filter, and the photocatalytic filter device according to the first embodiment will be described.

The method of manufacturing a photocatalytic filter according to Example 1 includes (1) pretreatment step, (2) adhesive curing step, and (3)
And a photocatalyst filter forming step. Hereinafter, each of these steps will be described in detail.

(1) Pretreatment Step This pretreatment step is a step of forming a mixture in which a large number of glass spheres are present between a large number of glass fibers and an adhesive is present between these glass fibers. As shown in FIG. 1, first, as a linear body, a diameter 125
6000 quartz glass fibers 1 (or trade name “PFG1 glass fiber” manufactured by HOYA Co., Ltd.) having a size of μm and a length of 260 mm are prepared. The glass fibers 1 are all aligned in the longitudinal direction and are all suitable containers 2 (for example, a product name "Natural Pack N-1" manufactured by Nishiyama Chemical Co., Ltd.).
0 ", size 80 x 60 x 280 mm). next,
As a granular material, 40 g of quartz glass spheres (trade name “SSV-43” manufactured by Tatsumori Co., Ltd.) having an average particle size of 50 μm are prepared and placed in the container 2.

Next, 40 ml (milliliter) of the adhesive liquid 4 (trade name "FJ-803" manufactured by Tokiwa Denki Co., Ltd.) was placed in the container 2 in which the glass fiber 1 and the glass ball 3 were housed, Close the lid, reciprocate (stroke 80m
m, 5 reciprocations / second) and stirred to form a mixture of the glass fiber 2, the quartz glass sphere 3 and the adhesive liquid 4.

(2) Adhesive curing step A mixture of the glass fiber 1, the quartz glass spheres 3 and the adhesive liquid 4 is placed in a drying container 5 (size 20) having a cotton cloth 5a stretched on the bottom thereof.
(0 × 80 × 300 mm), and put a cotton cloth 5b on the upper side to cover it.

Next, the drying container 5 is rocked or vibrated. This swing or vibration causes a stroke of 100 mm, 4 mm, so that the glass fiber 1 is accelerated and accelerated in its longitudinal direction.
Reciprocating motion of reciprocating / sec. At this time, hot air (80 ° C.) is simultaneously blown to dry the adhesive liquid 4. As a result, the glass fibers 1 are not bonded to each other, but only the silica glass spheres 3 are bonded to the surface of each glass fiber 1. Shaking and hot air blowing are performed for about 10 minutes until the adhesive liquid 4 is completely dried.

After being bonded in this manner, the glass fiber 1 having the quartz glass spheres 3 bonded to its surface is taken out from the container 5, and heat treatment (300 ° C., 2 hours) is carried out by the heating furnace 6 to further increase the bonding strength. . As a result, a filter material for a photocatalyst having a large number of quartz glass spheres bonded to the surface of the glass fiber 1 can be obtained. As shown in FIG. 2, this filter material is adhered and fixed in an island shape by an adhesive agent 4 in a state in which quartz glass spheres 3 are stacked in a plurality of steps on the surface of a glass fiber 1. Many are formed on the surface of the glass fiber 1.

FIG. 3 is a view showing a mode in which the quartz glass spheres 3 are overlapped with each other. As shown in FIG. 3, the upper stage silica glass spheres 3 are overlapped on the lower stage (base), that is, the plurality of silica glass spheres 3 on the glass fiber 1 side. In this case, in FIG. 3A, there are three lower stages and one upper stage, and in FIG. 3B, there are four lower stages and one upper stage.
3C shows an example in which the lower stage is four and the upper stage is two, and FIG. 3D is an example in which the lower stage is five and the upper stage is two.

In Example 1, the lower quartz glass sphere covers about 60% of the entire surface area of the glass fiber 1, and the upper quartz glass sphere 3 covers about 20%. When the quartz glass spheres 3 stacked in this manner serve as a base material and a photocatalyst filter is manufactured by bundling a large number of photocatalyst filter materials having photocatalyst formed on the surface thereof as described later, the photocatalyst having a porosity of 60% is produced. A filter can be constructed.

(3) Photocatalyst Filter Forming Step Next, a photocatalyst is formed on the surface of the filter material for the photocatalyst obtained in the adhesive curing step. As this photocatalyst, a titanium dioxide photocatalyst film is formed by a dip method or the like.
This dipping method is a method of forming a predetermined photocatalytic film on the material surface by putting the filter material in a liquid to which a photocatalyst can be applied and pulling it up at a predetermined speed (for example,
See Japanese Patent Laid-Open No. 2000-5691). Further, a so-called blow-away method (see Japanese Patent Laid-Open No. 2000-5691) may be used in which the filter material is put in a liquid to which a photocatalyst can be applied, and then excess liquid is removed by a predetermined air flow. . FIG. 4 is a view showing a photocatalyst filter material having a surface coated with a photocatalyst. As shown in FIG. 4, the photocatalyst 7 is formed on the surface of the quartz glass sphere 3 which is adhered and fixed in an island shape by the adhesive 4 and the surface of the glass fiber 1 to which the quartz glass sphere 3 is not adhered. .

Next, a large number of photocatalyst filter materials on which the photocatalyst is formed are bundled to form a filter bundle. This filter bundle is installed in an appropriate filter case, the fluid to be treated is introduced from one end surface of the filter bundle, and the contaminants contained in the fluid to be treated are surface of each filter material (that is, the surface of the photocatalyst 7). At the same time, the light is introduced into each photocatalyst filter material so that the trapped contaminants can be decomposed by the photocatalytic action to complete the photocatalyst filter.

FIG. 5 is a diagram showing the structure of a photocatalytic filter device 100 using the above-mentioned photocatalytic filter. As shown in FIG. 5, the photocatalyst filter device 100 includes a large number of photocatalyst filter materials having a photocatalyst film (this example: 60).
The filter bundle 10 formed by bundling (00 pieces) is housed in a cylindrical filter case body 11. Flange portions 12 and 13 are formed on both sides of the filter case body 11. The fluid inlet 12 is provided on the side of the flange 12.
a is provided, and a glass window 12b for introducing incident light L ₀ is provided on the front surface of the flange portion 12. A fluid discharge port 13a is provided on the side of the flange portion 13. When processing the fluid to be processed, while the light L ₀ is incident through the glass window 12b, the fluid introduction port 12a
The fluid to be processed is introduced from the above to flow into the gap in the filter bundle 10.

In the filter bundle 10, the quartz glass spheres 3 in which the glass fibers 1 are stacked and fixed in a plurality of stages are used as a matrix, and the void ratio 60 is obtained as described above.
Since a photocatalytic filter of 100% is obtained, a sufficient gap is secured. FIG. 6 is an explanatory view of the action of securing the gap by the quartz glass sphere 3. As shown in FIG. 6A, 2
When the lumps of quartz glass spheres stacked in layers are adjacent to each other to secure a gap, or as shown in FIG. There are cases where a lump exists and a gap is secured.

According to the first embodiment described above, quartz glass spheres stacked in a plurality of stages are formed by a very simple process of rocking and drying a mixture of glass fibers, quartz glass spheres and an adhesive. Since is bonded and fixed to the surface of the glass fiber in an island shape, a relatively large amount of silica glass spheres (average particle size 50 μm) can be simultaneously bonded to a large number of glass fibers. Moreover, since it is less likely that a strong force is applied to the glass fiber or the like, there is no risk of damaging the glass fiber or the like, and the photocatalytic filter can be manufactured with high yield.

In the first embodiment described above, an example in which the linear material is a glass fiber and the granular material is a quartz glass sphere is given. However, as the linear material, for example, a plastic fiber can be used. Examples of the wire and the granular material include plastic spheres, spherical silica gel, glass spheres, hollow glass spheres and the like.

Further, in the above-mentioned Example 1, an example in which the adhering step and the photocatalyst step are provided separately has been given. However, if the adhesive itself having a photocatalytic effect is used, the above-mentioned step can be made one. is there.

(Embodiment 2) FIG. 7 is an explanatory view of a method for manufacturing a filter material according to Embodiment 2 of the present invention. Hereinafter, the method of manufacturing the photocatalytic filter material according to the second embodiment will be described with reference to FIG. In the second embodiment, the drum-shaped container 8 is used in the pretreatment process and the adhesive curing process.
Since the configuration is the same as that of the first embodiment except that only the first embodiment is used, the difference from the first embodiment will be described below.

In FIG. 7, glass fibers 1 (600), quartz glass spheres 3 (50 g) and adhesive 4 (40 ml) are placed in a drum-shaped container 8 (diameter 210 mm, length 300 mm) installed horizontally. . Since the capacity of the drum-shaped container 8 is extremely large as compared with the total volume of the mixture of the glass fibers 1, (600 pieces), the quartz glass spheres 3 (50 g) and the adhesive liquid 4 (40 ml), these mixtures are The drum-shaped container 8 is housed so as to almost stick to the bottom thereof.

Next, the drum-shaped container 8 is attached to the rotary rollers 8a,
Place it on 8a and rotate it (rotation speed about 60 times /
Minutes). A scraping bar 8b fixed to the outside by a fixing mechanism (not shown) is installed on the inner peripheral surface of the drum-shaped container 8 near the upper portion thereof.

Therefore, the mixture that sticks to the bottom and tries to rise to the top by the rotation of the drum-shaped container 8 is
The scraping bar 8b blocks and returns it to the bottom. As a result, good agitation is performed, and an accelerating motion corresponding to rocking or vibration is applied to the glass fibers 1 to give an appropriate relative motion.

Next, while rotating the drum-shaped container 8, hot air is blown into the drum-shaped container 8 for about 20 minutes by using a blower 9 or the like, and the adhesive 4 is dried and hardened. After the quartz glass spheres 3 are adhered to the surface in this way, the glass fiber 1 is taken out of the container 5 and heat-treated (300 ° C., 2 hours). As a result, a filter material for a photocatalyst having a large number of quartz glass spheres bonded to the surface of the glass fiber 1 can be obtained.

According to the second embodiment, as compared with the first embodiment, the process can be made simpler, and the filter material for the photocatalyst can be manufactured more rapidly and in large quantities. It will be possible.

Next, a photocatalyst filter device 100 (see FIG. 5) was constructed using the filter bundle 10 manufactured by the method for manufacturing the photocatalyst filter material of Example 1 described above, and its performance test was conducted. FIG. 8 is a configuration diagram of a system for performing a performance test of the photocatalytic filter device. As shown in FIG. 8, the gas to be decomposed is diluted with pure air to produce a gas having a predetermined concentration. From each cylinder, they were mixed by a mass flow controller at a constant flow rate through a gas mixer. The gas was once stored in a buffer tank and sent to a cylindrical photocatalytic filter. For connection, a stainless pipe and a Teflon (registered trademark) tube were used together. The gas concentration was detected before and after the photocatalytic filter device 100. As the detector, gas chromatography (hereinafter referred to as "GC") was used. UV intensity is 10m
W / cm ² (∨) and the flow rate were fixed at 1 liter / min for measurement.

The results of examining the ability to remove components contained in the air using the above-mentioned test system will be described below. FIG. 9 is a graph showing the inlet-side concentration and the outlet-side concentration when a gas containing 20 ppm of acetaldehyde is passed through the photocatalytic filter device 100 of the present invention. As shown in FIG. 9, the gas at about 20 ppm on the inlet side had a residence time of 2.7 seconds and the concentration on the outlet side had decreased to the GC detection limit (0.08 ppm) or less. It was also continuously removed for 500 minutes. This means that acetaldehyde in the gas containing 20 ppm of acetaldehyde was removed all at once until the concentration became 1/100 or less.

FIG. 10 is a graph showing the inlet-side concentration and the outlet-side concentration of the photocatalytic filter device 100 when the concentration of acetaldehyde is set to 70 ppm in order to investigate the quantum efficiency. When the concentration on the inlet side is low at the beginning, it means that the measurement is performed from the time when gas mixing starts. Even at this 70 ppm, it decreased to 0.08 ppm or less in one pass. Assuming that acetaldehyde decomposes in a one-electron reaction, the quantum efficiency was actually 50%.

FIG. 11 shows trichloroethylene 20 ppm.
3 is a graph showing the inlet-side concentration and the outlet-side concentration when the gas of FIG. 20 pp
m is a concentration of about 1,000 times the environmental regulation value of 34 ppb. The gas of about 20 ppm on the inlet side had a residence time of 2.7 seconds, and similarly to acetaldehyde, the concentration on the outlet side decreased to 0.08 ppm or less of the detection limit. This means that trichlorethylene in the gas containing 20 ppm of trichlorethylene was removed until the concentration thereof became 1/100 or less all at once. This was also continuously removed for 500 minutes. Considering the filter life, it is confirmed that the filter has a life of 500,000 minutes (about 140 days).

Trichlorethylene is one of four harmful air pollution designated substances. Further, from the structural formula, trichlorethylene may generate toxic substances such as phosgene by oxidative decomposition. Therefore, a precise analysis by TENAX was performed for the above-mentioned outlet side concentration of 0.08 ppm or less. As a result, trichloroethylene is 0.2 p
It was confirmed that up to pb was removed.

FIG. 12 is a graph showing the concentration on the inlet side and the concentration on the outlet side when a gas of 1 ppm of benzene is passed through the photocatalytic filter device 100. 1 ppm is a concentration about 1,000 times the environmental regulation value 0.9 ppb. A gas of about 1 ppm on the inlet side has a residence time of 2.7 seconds and a concentration on the outlet side of 0.
It decreased to 2 ppm. It was measured under the same conditions as the above-mentioned acetaldehyde and trichlorethylene, such as the amount of light and the residence time, but 100% decomposition was not reached. I would like to clarify whether this is due to the fact that benzene is a stable substance and difficult to decompose, or because the number of electrons used for decomposition is large. However, 80% decomposition continues for 16 days. From this, two things can be considered. One is 16,000 days (about 4 days) as a benzene filter in the environment.
3 years) or more, or the performance of removal rate is maintained. The other shows that, considering the adsorption characteristics of benzene itself, benzene is gradually deposited on the photocatalyst, and the breakthrough phenomenon that will occur in the adsorption filter in the future will not occur in the photocatalytic filter device of the present case. It is considered that the breakthrough phenomenon due to the accumulation of decomposition products will not occur.

Like trichlorethylene, benzene is one of four harmful air pollution designated substances. It is also known as a substance with extremely high carcinogenicity. Therefore,
A removal rate of about 80% is not sufficient. The benzene residual amount and the decomposition products at 100% removal rate were analyzed by slightly changing the conditions. The condition is 20 mW that doubles the UV intensity.
cm ² (∨), and the residence time was doubled to 5.4 seconds. The result is shown in FIG. The concentration of benzene at the inlet side of 1 ppm decreased to below the detection limit of GC in one pass. To check if it is completely decomposed, set the outlet concentration to TE
NAX analysis was performed. Benzene was removed to 0.2 ppb or less, which is below the TENAX detection limit. No decomposition products were detected.

[0055]

As described above in detail, according to the method for producing a filter material and the method for producing a photocatalytic filter material according to the present invention, a filter composed of a homogeneous linear object having a large number of particles adhered to the surface thereof The material and the photocatalytic filter material can be mass-produced with high productivity, and the photocatalytic filter and the photocatalytic filter device according to the present invention can easily obtain a high-performance photocatalytic filter and the photocatalytic filter device. It will be possible.

[Brief description of drawings]

FIG. 1 is an explanatory view of a method of manufacturing a photocatalytic filter material of Example 1.

2 is a diagram showing a photocatalyst filter material of Example 1. FIG.

FIG. 3 is a diagram showing an aspect in which quartz glass spheres 3 of Example 1 are overlapped with each other.

FIG. 4 is a diagram showing a photocatalyst filter material of Example 1 in which a photocatalyst is applied and formed on the surface.

5 is a diagram showing a configuration of a photocatalytic filter device 100. FIG.

FIG. 6 is an explanatory view of the action of securing a gap by a quartz glass ball.

FIG. 7 is an explanatory diagram of a method of manufacturing a photocatalytic filter material according to the second embodiment.

FIG. 8 is a configuration diagram of a system for performing a performance test of the photocatalytic filter device.

FIG. 9 is a graph showing the inlet-side concentration and the outlet-side concentration of the filter device when a gas containing 20 ppm of acetaldehyde is passed through the photocatalytic filter device.

FIG. 10 is a graph showing the concentration on the inlet side and the concentration on the outlet side when the concentration of acetaldehyde is set to 70 ppm in order to investigate the quantum efficiency.

FIG. 11 is a graph showing the concentration on the inlet side and the concentration on the outlet side when 20 ppm of trichlorethylene gas is passed through the photocatalytic filter device.

FIG. 12 is a graph showing the inlet-side concentration and the outlet-side concentration when a gas of 1 ppm of benzene is passed through the photocatalytic filter device.

FIG. 13 is a graph showing the inlet-side concentration and the outlet-side concentration when a gas of 1 ppm of benzene is passed through the photocatalytic filter device.

[Explanation of symbols]

1 ... Glass fiber, 2 ... Container, 3 ... Quartz glass sphere,
4 ... Adhesive liquid, 5 ... Container, 6 ... Drum-shaped container, 7 ... Photocatalyst, 10 ... Filter bundle, 11 ... Filter case body,
12, 13 ... Flange portion, 12a ... Fluid inlet port, 12b
... glass window, 13a ... fluid outlet.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01J 35/06 B01D 53/36 J (72) Inventor Kazuya Uchida 2-7-5 Nakaochiai, Shinjuku-ku, Tokyo Hoya shares companies in the F-term (reference) 4D019 BA02 BA04 BA06 BA13 BB11 BB12 BB13 BC07 CB02 CB03 CB06 4D048 AA11 AA17 AA19 BA12X BB01 BB08 EA01 4G069 AA01 AA03 AA08 BA14A BA14B BA48A CA01 CA11 CA15 CA19 DA06 EA03X EA03Y EA04X EA04Y FA03 FB15

Claims (4)

[Claims] 1. A method for producing a large number of filter materials in which a large number of particles are adhered to the surface of a linear object, wherein a large number of particles having a diameter smaller than the diameter of the linear object are provided between the plural linear objects. And a pretreatment step of forming a mixture in which an adhesive agent is present between the linear material and the granular material, and an accelerating motion such as vibration or rocking is applied to the mixture. Adhesion in which the particles are stacked and fixed in islands on the surface of the linear objects by drying or curing the adhesive while allowing the linear objects to move relative to each other. A method of manufacturing a filter material, comprising a step of curing an agent. 2. A method for producing a large number of photocatalytic filter materials on the surface of a glass fiber by adhering a large number of glass spheres to the surface thereof, wherein the diameter of the glass fiber is smaller than the diameter of the glass fiber. A pretreatment step of forming a mixture in which a large number of glass spheres are intervened and an adhesive is interposed between these glass fibers, and an accelerating motion such as vibration or rocking is applied to the mixture to produce the glass fiber. An adhesive curing step in which the glass spheres are stacked and adhered and fixed in an island shape on the surface of the glass fiber by drying or curing the adhesive while allowing them to move relative to each other. A method for manufacturing a photocatalytic filter material, comprising: 3. A filter bundle having a gap between each photocatalyst filter material is formed by bonding a large number of glass spheres to the surface of a glass fiber and bundling a large number of photocatalyst filter materials having a photocatalyst formed on the surface thereof. Then, the fluid to be treated is introduced from one end face of the filter bundle, the contaminants contained in the fluid to be treated are captured on the surface of each filter material, and the light is introduced into each photocatalytic filter material to introduce the light. A photocatalytic filter for decomposing captured contaminants by a photocatalytic action, wherein the glass sphere has a diameter smaller than that of the glass fiber, and islands are stacked on the surface of the glass fiber in multiple stages. A photocatalytic filter, which is adhesively fixed in a circular shape. 4. A photocatalyst filter, a filter case main body for accommodating the photocatalyst filter, and flange portions provided on both sides of the filter case main body, wherein the side portion of the flange portion on the one side has the cover. An inlet for processing fluid is provided, an outlet for the fluid to be processed is provided on a side portion of the flange portion on the other side, and light is incident on the photocatalytic filter on the front surface portion of the flange portion on the one side. A photocatalytic filter device comprising a glass window for use and a photocatalytic filter according to claim 3 used as the photocatalytic filter.