JP3095735U - Photocatalytic filter - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] By making microporous and widening the effective area of a photocatalytic filter of a honeycomb structure or a corrugated structure,
A great improvement in the photocatalytic adsorption capacity and a prolonged life of the catalyst, as well as a small installation area and space saving,
It is possible to install the photocatalyst deodorizing device indoors and outdoors, and to further simplify the installation work and shorten the start-up adjustment period. SOLUTION: The photocatalyst filter 4 has a honeycomb structure or a corrugated structure, and a photocatalyst layer 413 is formed on the surface of the honeycomb structure or the corrugated structure directly or via a protective adhesive layer 412 by lamination coating. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The invention of this application is particularly related to a photocatalyst film in which titanium oxide or the like is carried and processed on a plurality of structures. Filter and deodorizing device equipped with this photocatalyst filter. As a structure of the substrate, one layer of the photocatalyst layer or two layers of the protective adhesive layer and the photocatalyst layer are formed on the surface of the substrate. Layer-coated honeycomb structure or corrugated structure, and these structures Deodorizing device.   According to the invention of this application, a table of photocatalytic titanium oxide coating per unit area is provided. Since the area can be enlarged and the photocatalyst can efficiently absorb and decompose the malodor, It is possible to improve the efficiency of the deodorizing function of the photocatalyst, and also to absorb the photocatalyst filter. Since no adhesive is applied, it can handle odorous air with high humidity and is treated as an accessory. It makes it easy to install and maintain equipment, provides economical equipment, and It can be used in various fields as a device for treating malodorous gas.

[0002]

[Prior art]

  In recent years, a deodorizing device for deodorizing using a photocatalyst has begun to be developed. But, The deodorizing function of the photocatalytic filter is under development, and its application is restricted. It was something.

[0003]

[Problems to be solved by the device]

  The invention of this application aims to improve the deodorizing function in order to solve the above problems. In addition, since its application range is expanded and it is used in various fields as a photocatalytic deodorizing device, To provide a photocatalytic filter that can

[0004]

[Means for Solving the Problems]

  The invention of this application firstly forms a honeycomb structure or a corrugated structure, A photocatalyst layer is directly provided on the surface of the honeycomb structure or corrugated structure or a protective adhesive layer is interposed. A photocatalyst filter (claim 1) comprising a photocatalyst layer laminated and coated.     Further, the invention of this application is such that the cell size of the honeycomb structure is 5 mm or less. A micro-honeycomb having pores (claim 2) or a corrugated core structure The cell size may be a micro corrugate having fine holes of 5 mm or less (claim 3) to provide a photocatalytic filter.   Further, the invention of this application uses the material of the honeycomb structure or the corrugated structure as an alloy. A photocatalytic filter made of luminium (claim 4) is provided.   Still further, the invention of this application is such that a blower for supplying malodorous air and a supplied malodorous air are provided. Deodorizing apparatus body having an inlet for introducing odorous air and an outlet for discharging treated air And a photocatalytic deodorizing device having an ultraviolet lamp provided inside the deodorizing device body A photocatalytic filter (claim 5) is also provided.

[0005]

[Embodiment of device]

  Photocatalyst as photocatalyst layer, various polyester films, general-purpose resins, fluororesins , Various paper products, glass, metal, aluminum, ceramics, etc. Can be coated, using various coated substrates to further add honeycombs and corrugates It can be processed as a structure. Based on honeycomb or corrugated structures As a material, a photocatalyst may be applied to form a photocatalyst layer.   As a coating method for the surface of the above-mentioned various base materials, a low temperature curing type photocatalytic coating is used. The coating agent can be applied by a dipping method, a brush coating method, or a spray method.   The various coating methods are as follows.

[0006] (In case of coating low temperature curing type photocatalytic coating material by dip method)   First, wipe the substrate with the photocatalytic coating with ethanol, for example, When using a lath board, do ultrasonic cleaning with a sodium-free detergent. Form a clear coated surface and prepare the coated substrate. Next, protective adhesive layer coating liquid (Underlayer coating solution) is applied. At that time, in order to prevent white turbidity of the coating film, humidity 70% R Coating is performed in an environment of H or less. Dip the base material in the coating solution and apply 10 to 50 cm / min. Specifically, it is pulled up at a speed of 20 cm / min. After coating, 60 to 120 ° C, preferably It is heated and cured at 100 to 120 ° C. If the curing temperature is higher than 120 ° C, light This is because the adhesive force of the medium layer decreases. Curing time is 60 ° C for 15-30 minutes, 80 ° C It takes about 15 minutes. After curing by heating, leave at room temperature for about 30 minutes to cool sufficiently It Finally, the photocatalyst coating liquid (upper layer coating liquid) is applied. At this time, apply a protective adhesive layer. The processed base material is dipped in a coating liquid, and 10 to 50 cm / minute, preferably 20 cm / minute. Pull up at speed. After coating, in the temperature range of 60-180 ℃, at the highest temperature possible Let it harden. The curing time is 60 to 80 ° C for 30 minutes, and 100 ° C or higher for about 15 minutes. It is a guide. In addition, the coating method does not apply the lower layer coating liquid of the protective adhesive layer, The upper layer coating liquid may be a single layer coating.

[0007] (In case of coating with low temperature curing type photocatalytic coating material by brush coating method)   First, wipe with ethanol, which is the substrate on which the photocatalytic coating is applied, or When using a lath board, do ultrasonic cleaning with a sodium-free detergent. Form a clear coated surface and prepare the coated substrate. Next, protective adhesive layer coating liquid (Underlayer coating solution) is applied. At that time, in order to prevent white turbidity of the coating film, humidity 70% R Coating is performed in an environment of H or less. It is desirable that the iron brush for oil-based paint contains sufficient chemical liquid. To complete the application, apply once. After coating, 60-120 ° C, preferably 100- Cure at 120 ° C. When the curing temperature is higher than 120 ° C, the adhesive force of the photocatalyst layer Is reduced. Curing time is 15-30 minutes at 60 ℃, 15 minutes at 100 ℃ The degree is a guideline and varies depending on the thickness of the coating film. After curing by heating, let stand for about 30 minutes at room temperature Place and cool well. Finally, the photocatalyst coating liquid (upper layer coating liquid) is applied. this At this time, use either a water-based paint or an oil-based paint for the trowel brush, It is impregnated for a minute, and coating is desirably completed once. After painting, 60 ~ 180 ℃ It is cured in the temperature range, preferably 100 ° C. or higher. The higher the temperature, the faster the curing speed It The curing time is 60 to 80 ° C for 30 minutes, and 100 ° C or higher for about 15 minutes. It changes depending on the thickness of the coating film. In addition, the coating method is the lower layer coating liquid of the protective adhesive layer. There is also a case where the above is not applied and the substrate is applied with one layer of the upper layer coating liquid.

[0008] (In case of applying low temperature curing type photocatalytic coating material by spray method)   First, wipe the substrate with the photocatalytic coating with ethanol, for example, When using a lath board, do ultrasonic cleaning with a sodium-free detergent. Form a clear coated surface and prepare the coated substrate. Next, protective adhesive layer coating liquid (Underlayer coating solution) is applied. At that time, in order to prevent white turbidity of the coating film, humidity 70% R Coating is performed in an environment of H or less. Apply a thin coat evenly over the entire surface. It is sufficient if the amount of coating is such that the thickness of the coating film after drying is about 1 to 3 μm. is there. After coating, it is cured at 60 to 120 ° C, preferably 100 to 120 ° C. Hard This is because when the oxidization temperature is higher than 120 ° C., the adhesive force of the photocatalyst layer is reduced. Hard As a guideline, the curing time is 30 minutes at 60 ° C and about 15 minutes at 100 ° C or higher. It depends on the size. After heat-curing, leave at room temperature for about 30 minutes to cool sufficiently. Most After that, a photocatalyst coating liquid (upper layer coating liquid) is applied. At this time, spray thinly To apply. The amount of coating is such that the thickness of the coating film after drying is about 1 to 3 μm. It is enough. After coating, temperature range of 60-180 ° C, preferably 100 ° C or higher To cure. The higher the temperature, the faster the curing rate. Curing time is 30 minutes at 60 ℃, 15 minutes at 80 ° C and 2 to 3 minutes at 100 ° C are standard, and change depending on the thickness of the coating film. . In addition, as the coating method, the lower layer coating liquid of the protective adhesive layer is not applied and the upper layer coating liquid is applied to the substrate. In some cases, it is a single layer coating.

[0009]   In the device of this application, a protective adhesive layer is provided to facilitate the deployment in the deodorizing device body. And a photocatalyst layer, or a photocatalyst layer without a protective adhesive layer. The photocatalytic filter of the Nicam structure may be formed as a photocatalytic cartridge. The number of catalyst cartridges and the area of the catalyst cartridges to be installed depend on the air volume and the degree of air pollution. It is possible to set the optimum one according to. For example, as shown in FIG. Multiple photocatalytic filters and UV that support titanium oxide etc. supported on multiple special adsorbents It is combined with a wire lamp to form multiple layers, and the gas to be processed passes through it in a cross flow method. It is also possible to use a light regenerating decomposition type environmental purification device. This optical regeneration decomposition method According to the environmental purification device, deodorizers such as garbage processing machines and other deodorizing equipment for atmospheric protection The application range can be expanded as a storage device.

[0010]   Further, depending on the purpose of use, other equipment, for example, a cart for the soil purification layer (9) It can also be combined with a ridge. In this case, a bad odor (not shown) It may be equipped with a blower to supply it.   Hereinafter, the invention of this application will be described in more detail with reference to the drawings.

[0011]

【Example】

  FIG. 1 shows a schematic diagram of a photocatalytic deodorizing apparatus according to the present invention. Deodorizer is a deodorizer A multi-stage photocatalyst cartridge type photocatalyst filter (disposed in the main body (1) ( 4) and an ultraviolet lamp (5) and a blower (5) for supplying malodorous air It The deodorizing device body (1) has an inlet (2) for introducing the supplied malodorous air and a treatment. An outlet (3) is provided for discharging the trapped air.   Fig. 3 shows various polyester films, general-purpose resins, fluororesins, various paper products, and Photocatalyst coated on the surface of various substrates such as lath, metal, aluminum, ceramic A filter (4) is shown typically. Honeycomb structure (41) or corrugated structure In the case of the body (42), the photocatalyst layer (413) is formed on the surface of various base materials (411, 421). , 423) is applied directly or via a protective adhesive layer (412, 422) to provide a photocatalyst. Low temperature curing type 1 layer type or low temperature curing type 2 layer type with titanium oxide coating (The product name of the coating agent is "Photocatalyst titanium oxide coating agent Visator" L series ”). This photocatalyst is transparent and has high hardness In addition, a photocatalyst with extremely high activity can be formed at a low temperature. Of course, Cote The ing agent is not limited to this.

[0012]   The photocatalyst carrier used in the invention of this application is a photocatalyst (titanium oxide) coated. The cell prepared by using the photocatalyst-supporting material schematically shown in FIG. Small honeycomb and corrugated structures take up a large area per unit volume. The porous body has a large effective area. This makes it suitable for the application It is possible to use it for various malodorous substances,

[Table 1] The various malodorous substances shown in can be deodorized over a wide range.

Here, the co-coating agent for the photocatalyst layer used contains a solid content (unit: wt%) 8 in a solvent of water, alcohol and binder SiO ₂ , and has a viscosity (unit: cp / 25 ° C.) of 20 to 20 ° C. It is prepared to have a value of 40, and is applied by the dip method, the spray method, and the brush coating method described above, and is cured at a low temperature. According to this, a transparent and highly hard film having extremely high photocatalytic activity is formed. Further, a flexible photocatalytic film that can follow a polyester film or the like can also be formed. In this way, the coating method can be selected according to the base material and the construction site. When a coating agent for the protective adhesive layer is used, depending on the type of coating method, in the dipping method, the solvent of acrylic silicone ester and alcohol contains solid content 10 (unit wt%) and the viscosity is 2-10 ( In the spraying method, those having a solid content of 10 (unit: wt%) in a solvent of xylene and alcohol and having a viscosity of 2 to 10 (unit in cp / 25 ° C.) are brush-coated. In the method, a solvent containing a solid content of 10 (unit: wt%) in a solvent of ester or alcohol and having a viscosity of 2 to 10 (unit: cp / 25 ° C.) is used.

[0014]   The photocatalyst by the novel one-layer coating method or two-layer coating method according to the invention of this application It is possible to prevent deterioration of the base material due to the action and obtain a material having excellent weather resistance. Also, You can select from transparent film to frosted glass film as needed to expand the application range. it can.

In the invention of this application, in the case of the aluminum core, the production condition of the photocatalyst film is, specifically, in the case of the micro-honeycomb structure, the cell size of the honeycomb structure is a micro-honeycomb having fine pores of 5 mm or less. In this case, it has an effect that the cell size is 1.0 mm or less, the number of cells is 116 holes / cm ² (750 holes / in ² ) or more, and the effective surface area of the cell alone is 39.2 cm ² / It was advantageous when it was cm ³ or more. Further, in the case of the corrugated core structure, it is effective when the cell size of the corrugated core structure is a micro corrugate having fine holes of 5 mm or less, the cell size is 0.8 mm or less, and the number of cells is 124 / A more excellent deodorizing effect could be obtained when the micropores were set to be cm ² (800 cells / in ² ) or more and the effective surface area of the cell alone was set to about 37 cm ² / cm ³ or more. In this way, the effective surface area of the aluminum core was confirmed to be significantly more effective than the conventional one in the deodorizing effect of the photocatalyst when the micro-honeycomb structure and the corrugated core were finely designed. The structure of the corrugated core is not limited to that shown in FIG.

[0016]

According to the invention of this application, whether the photocatalyst layer is directly coated on the surface of the substrate Alternatively, since the photocatalyst layer is laminated and coated through the protective adhesive layer, the honeycomb structure or the core is coated. It can be easily applied to rugate structures to produce photocatalytic filters. The simple structure of the nicam structure or corrugated structure facilitates the photocatalytic fill. It is possible to make the passage of the turbine a fine hole and expand the effective area, Oxidation of photocatalyst, which has a very long life of the medium and is 5 to 10 times more than that of activated carbon. Can effectively deodorize, the light installation area is small and the adsorption capacity per unit area is large. It is possible to provide an improved catalyst filter.   Also, as an application example, in a photocatalytic deodorizing device with a photocatalytic filter installed inside. By blowing off the odorous gas from which dust has been removed as the gas to be processed, Pass through the photocatalyst filter of the photocatalyst cartridge type that has been converted into a cross flow method, The photocatalyst cartridge is made to react with the odorous component compounds to make them odorless and harmless, and from the outlet Can be discharged.   Of a honeycomb structure coated with one layer of a photocatalyst layer or two layers of a protective adhesive layer and a photocatalyst layer Deodorized because it is formed as a photocatalyst cartridge equipped with a photocatalyst filter. Maintenance such as deployment within the device body can be facilitated, and the deployment air It is possible to set the optimal number of catalyst cartridge stages and area according to the degree of pollution. It

[0017]   Ultraviolet light has a wavelength in the light that is in the shorter wavelength range than visible light, Ultraviolet rays with a wavelength of 300 nm or less cause chemical changes in organisms (diffusing molecules) and proteins. It is said that if the sunlight reaches the surface of the earth directly, the creatures will be killed immediately. It is said that it is actually absorbed by ozone in the atmosphere and does not reach the surface, In this example, a photon of 400 nm or less is emitted from an ultraviolet lamp, and the photon is exposed to light. It is assumed that a strong oxidizing power is generated when it hits the medium.

[0018]   The odorous gas from which dust has been removed is blown into the photocatalyst cartridge to form odorous components. When the compound is exposed to ultraviolet light, the titanium oxide is converted into ultraviolet light as shown in FIG. When irradiated with, the free electrons start to move, and the strongest radicals are Oxidative components in the air are oxidatively decomposed, and at the same time, ozone is generated and converted into oxidative compounds. After that, deodorize and detoxify and discharge from the outlet.

[0019]   When the corrugated photocatalyst was used, the concentration before treatment at the entrance of the photocatalyst deodorizer was As shown in, types of malodorous substances such as acetic acid, ethyl acetate, diethyl ether, Regardless of whether they are acetaldehyde or by the intensity of the malodor, At the outlet of the photocatalytic deodorizer after treatment, the concentration can be reduced to a value close to zero. It was

[0020]   According to this embodiment, it goes without saying that the UV output efficiency is high, and It is possible to improve the efficiency of photochemical reactions by using a low-pressure ultraviolet lamp that also generates come. For OH radicals and ozone which are strong active oxygen generated by photocatalyst and ultraviolet rays Oxidizes and decomposes malodorous components and disperses them in carbon dioxide and water vapor, extending the life of the structure. Can be mortified.

[0021]

[Effect of device]

    From the above, the invention of this application is that the photocatalyst layer is directly applied to the surface of the base material or the protective contact is applied. Since the photocatalyst layer is laminated and coated through the adhesion layer, the honeycomb structure or the core It can be easily applied to rugate structures to produce photocatalytic filters. In addition, the passage of the photocatalytic filter of the honeycomb structure or corrugated structure is formed with fine holes. It is easy to obtain a large effective area by using a simple structure. As a result, the photocatalyst can be deodorized by oxidation, but the life of the catalyst is considerably long. The photocatalyst coated with activated carbon is longer and has a longer useful life than conventional photocatalysts. The deodorizing capacity per unit area can be significantly improved compared to Since the installation area of the computer is small and space is saved, The photocatalytic deodorizer that uses a photocatalytic filter for the installation area and space saving It can be installed both indoors and outdoors. Also, the installation work It is also possible to provide a device that is simple and has a short startup adjustment period.

[0022]   The photocatalyst devised in this application is designed to wash components adhering to the surface with water after decomposing the adsorbed gas. After washing with water, the catalyst's self-regenerating ability restores it to its original state. And the clogging of the catalyst can be recovered by washing with water. Since no chemicals are used, the cost is low and the maintenance cost can be greatly reduced. You can

[0023]   In addition, the photocatalyst devised in this application is designed to remove trace harmful substances and persistent substances in the environment. It is effective in treating industrial waste even if it is used for acidic, alkaline, and neutral odors. Since it is not discharged, it can handle a wide range of odorous gases.

[0024]   In addition, this optical regeneration type adsorption and decomposition method for environmental purification equipment It can also be expanded to other fields such as deodorizers such as waste treatment machines and other uses for atmospheric protection.   Can be combined with combustion type, acid-alkali, biological type, odor type such as activated carbon Is.

[0025]   The catalyst cartridge can be used for a long period of time, and can protect against high-humidity odorous gas in cold regions. It does not cause moisture adsorption or dew condensation, and its ability to maintain treatment effects is extremely high. The power used is only low blower for air introduction and UV lamp for oxidative decomposition of malodorous components. Even in the case, it can be done in the same level as household appliances.

[0026]   As described above, the photocatalyst cartridge of the invention of this application has various odorous substances. Select a photocatalyst cartridge suitable for quality and use it in combination according to the application. It can handle a wide range. This will extend the life of the photocatalyst cartridge and It is possible to reduce the amount and weight.

[Table 1]

[Brief description of drawings]

FIG. 1 is a schematic view showing a photocatalytic deodorizing apparatus according to the present invention.

FIG. 2 shows a specific structure of a photocatalyst filter according to the photocatalyst deodorizing device of the present invention, (a) is a schematic view of a honeycomb structure in which the photocatalyst filter has a honeycomb structure, and (b) is a photocatalyst filter. FIG. 3 is a schematic diagram of a corrugated structure in the case of forming a corrugated structure.

FIG. 3 is a diagram schematically showing a cross section of a coated surface of the photocatalyst filter according to the present invention, where (1) shows a one-layer coating and (2) shows a two-layer coating.

FIG. 4 is a diagram showing changes in concentration at the inlet and the outlet before and after use in the case where the photocatalytic deodorizing apparatus according to the present invention is equipped with a photocatalytic filter having a corrugated structure, for each elapsed day.

FIG. 5 is a schematic view showing another embodiment in which the photocatalytic deodorizing device using the photocatalytic filter according to the present invention is combined with the soil purification layer (9).

FIG. 6 is a diagram schematically showing an oxidative decomposition action by an ultraviolet lamp.

[Simple explanation of symbols]

1 Deodorizing device body 2 entrance 3 exit 4 cartridge type photocatalytic filter 41 Photocatalytic filter with honeycomb structure 42 Photocatalytic filter with corrugated structure 411,421 substrate 412, 422 protective adhesive layer 413,423 photocatalyst layer 5 UV lamp 6 blower 7 stench gas 8 Processing gas 9 soil purification layer

Claims (5)

[Scope of utility model registration request] 1. A photocatalytic filter comprising a honeycomb structure or a corrugated structure, and a photocatalytic layer coated on the surface of the honeycomb structure or the corrugated structure directly or via a protective adhesive layer. 2. The photocatalyst filter according to claim 1, wherein the honeycomb structure has a cell size of 5 mm or less. 3. The photocatalytic filter according to claim 1, wherein the corrugated core structure is a microcorrug having micropores of 5 mm or less. 4. The photocatalytic filter according to claim 2, wherein the material of the honeycomb structure or the corrugated structure is aluminum. 5. The method according to any one of claims 1 to 4,
Photocatalytic deodorizing device having a blower for supplying malodorous air, a deodorizing device body having an inlet for introducing the malodorous air supplied and an outlet for discharging treated air, and an ultraviolet lamp arranged in the deodorizing device body Photocatalytic filter used for.