KR200411427Y1 - Photocatalyst Filter - Google Patents

Abstract

The present invention relates to a photocatalyst filter, and more particularly, to a photocatalyst filter capable of efficiently photocatalytically decomposing a substance to be degraded by improving a photocatalyst member provided in the photocatalyst filter.

The present invention is a photocatalyst filter used for water quality and sterilization or atmospheric purification, is positioned to surround the front surface of the photocatalyst irradiator and the photocatalyst irradiator provided for irradiating a light source to the photocatalyst, the surface has a plurality of minute grooves And a photocatalyst coated in a thin film to adsorb and decompose harmful substances on the surface of the substrate and the substrate including the metal oxide to be formed.

Photocatalyst filter, photocatalyst irradiator, metal oxide, substrate, photocatalyst

Description

Photocatalyst Filter {Photocatalyst Filter}

1 is a perspective view showing an example of a photocatalyst filter according to the present invention.

FIG. 2 is an enlarged view showing an enlarged photocatalyst member of FIG. 1; FIG.

3 is a process chart showing how the photocatalyst member of FIG. 2 is manufactured sequentially.

FIG. 4 is an enlarged view partially showing a process of sequentially forming the photocatalyst member of FIG. 3; FIG.

(A) is sectional drawing along the line A-A of FIG. 4 (a), (b) is sectional drawing along the line B-B of FIG. 4 (b), (c) is sectional drawing along the C-C line of FIG.

(A) is sectional drawing along the D-D line of FIG. 4 (a), (b) is sectional drawing along the E-E line of FIG. 4 (b), and (c) is sectional drawing along the F-F line of FIG.

7A and 7B are views for illustrating an example of a process in which photocatalytic decomposition is efficiently performed by providing a photocatalyst filter according to the present invention in a clean device.

8A and 8B are diagrams for illustrating a process in which photocatalytic decomposition is efficiently performed by providing a plurality of photocatalyst filters, which are one example according to the present invention, in a clean device.

FIG. 9 is a view illustrating a process in which the clean device shown in FIGS. 7A to 8B is provided in a wastewater purification device as one example, and is purified while being decomposed.

* Description of the main parts of the drawings *

200, 300, 740: photocatalyst members 300a, 400a, 500a, 600a: substrate

400a ₁ , 500a ₁ , 600a ₁ : Metal oxide 400a ₂ , 500a ₂ , 600a ₂ : Groove

410, 510, 610: titanium compound

The present invention relates to a photocatalyst filter, and more particularly, to a photocatalyst filter capable of efficiently photocatalytically decomposing a substance to be degraded by improving a photocatalyst member provided in the photocatalyst filter.

In general, photocatalysts are photoexcited in response to irradiation of light having energy above a band gap and generate electrons and holes. Part of the electrons and holes move to the surface of the photocatalyst to decompose and remove harmful substances in the air and water.

The photocatalyst works more efficiently as the contact area with the to-be-decomposed product is wide and the energy of light irradiated within a predetermined range is larger. Titanium oxide is mentioned as a typical photocatalyst. The photocatalyst such as titanium oxide is irradiated with light such as the sun, fluorescent lamp, black right, xenon lamp, mercury lamp, sodium lamp, incandescent lamp or cold cathode discharge tube. The material can be adsorbed and decomposed or filtered through water purification, air purification, sterilization or sterilization.

In addition, the photocatalyst is used fixed to a base material to facilitate handling. As the substrate on which the photocatalyst is fixed, for example, paper, cloth, polymer resin, steel, glass fiber or the like is used for air cleaning and deodorization. It is known as a filter of an air purifier and a deodorizer which formed the base material selected from the above-mentioned thing, and formed the honeycomb shape, the three-dimensional wing shape, the exposure type optical fiber filter, etc., and coated the photocatalyst. In addition, as a base material, adsorption materials, such as a ceramic baking material, zeolite, activated carbon, or a silica gel, are used, for example for water purification and sterilization. Coating of a photocatalyst on such a substrate is known as a filter of a water purification device and a sterilization purification device.

However, photocatalysts decompose not only harmful substances due to their chemical properties but also organic substances such as paper, cloth, and polymer resin, which are substrates. In addition, paper, cloth, polymer resin, and the like are deteriorated and deteriorated by ultraviolet rays. Seriously, since the paper or cloth absorbs moisture, the photocatalyst film may be peeled off.

Accordingly, the photocatalyst member based on paper, cloth, polymer resin, etc. is weak in durability, short in life, and degrades decomposition performance as a photocatalyst, resulting in a high manufacturing cost and a low production yield.

On the other hand, in another conventional example, a photocatalyst member based on steel, it is necessary to design the substrate in a complicated shape in order to increase the contact area with the to-be-decomposed product, which increases the working time and eventually the manufacturing cost. Ascending problems occur.

At this time, in the photocatalyst filter in which the shape of the substrate is formed by a filter such as a honeycomb shape or a three-dimensional wing shape using a photocatalyst member based on such steel, light is not uniformly irradiated onto each photocatalyst particle. do. In addition, even in the photocatalyst filter made of an exposure type optical fiber filter including the photocatalyst filter described above, the contact area is increased to increase the density to decrease the light transmittance, while the contact area is narrow to improve the light transmittance. As a result of the trade-off problem, sufficient contact area cannot be secured, which leads to a limitation in efficiently photocatalytic decomposition of the substance to be degraded.

In order to solve the above problems, the present invention improves the photocatalyst member provided in the photocatalyst filter to efficiently decompose the photocatalytic substance, and reduces the production cost of the cleaning device using the photocatalyst member as a filter and at the same time yields It is an object of the present invention to provide a photocatalyst filter capable of improving the rate.

The present invention for solving the above problems is a photocatalyst filter used for water quality and sterilization or atmospheric purification, tubular photocatalyst irradiation unit provided for irradiating a light source to the photocatalyst; A metal oxide is added to a steel material, the substrate is positioned to surround the photocatalyst irradiation part, and contains a substrate and a titanium compound formed to have a plurality of minute grooves on a surface thereof, and are harmful to the surface of the substrate. And a photocatalyst coated on the surface of the substrate in a thin film to adsorb and decompose the material.

The photocatalyst irradiation unit may be at least one of a fluorescent lamp, a black light, a xenon lamp, a mercury lamp, a sodium lamp, and an incandescent lamp.

In addition, the metal oxide is characterized in that the nickel-chromium (Ni-Cr) alloy.

In addition, the shape of the base material is characterized in that at least one of circular, spiral, vortex type.

In addition, the substrate is characterized in that formed in plural.

In addition, the substrate is characterized in that it is stacked overlapping each other.

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In addition, the titanium compound is characterized by being anatase (TiO ₂ ).

In addition, the substrate is characterized in that it further comprises a light transmitting member for transmitting light.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

As shown in FIGS. 1 and 2, one example of the photocatalyst member 200 according to the present invention is a thin plate having a thickness t of about 0.04 mm and a width w of about 0.8 mm. ) Is manufactured. At this time, the photocatalyst member 200 is a titanium compound (not shown) coated and fixed on a surface of a substrate (not shown) containing a metal oxide in a steel material to be described later and a surface of the substrate (not shown). City). The shape of the photocatalyst member 200 may be any shape so long as it is positioned to surround the front surface of the photocatalyst irradiator (not shown) to widen the contact area, but the photocatalyst member 200 is preferably described above. The shape of has a shape of at least one of circular, spiral, vortex type. More preferably, the shape of the photocatalyst member 200 described above allows the light, which is a light source irradiated by the photocatalyst irradiator (not shown), to uniformly irradiate the photocatalytic particles present in the photocatalyst member 200 to efficiently remove the substance to be degraded. As a result, it has a spiral shape that can decompose the photocatalyst.

The photocatalyst member 200 including the substrate (not shown) is provided in plurality, and is formed to be twisted in a spiral shape so as to overlap each other. In other words, it is usually formed in a mass like a scrubber.

Here, a method of sequentially fabricating a photocatalyst member including a substrate (not shown) including a metal oxide and a titanium compound (not shown) that is coated and fixed on a surface of the substrate (not shown) in a thin film form is fixed in detail. Looking at it as shown in FIG.

FIG. 3 is a process chart illustrating a method of sequentially manufacturing the photocatalyst member of FIG. 2. First, the photocatalyst member according to the present invention undergoes a process of electrolyzing the surface of the substrate and a process of coating the titanium compound in the form of a thin film on the surface of the electrolyzed substrate described above. Such a method of sequentially preparing a photocatalyst member for photocatalytic decomposition of a substance to be degraded according to the present invention will be described with reference to FIG. 3.

As shown in FIG. 3, first, in step (a), the substrate 300a prepared by adding metal oxide to steel is immersed in water 312 and washed, and in step (b), The substrate 300a is immersed in the electrolyte solution 314a in the electrolytic cell 314 to electrolyze the surface of the substrate 300a. The substrate 300a which has undergone the electrolysis process is formed with a plurality of minute grooves (not shown) called pit holes on the surface of the substrate 300a.

Here, the aforementioned groove portion (not shown) is uniformly spaced apart at regular intervals on the surface of the substrate 300a. Such a groove portion (not shown) is preferably formed at such a size and spacing that the particles of titanium oxide (not shown) are easily attached. For example, the above-described gap between the grooves (not shown) is formed to be about 1 μm. In addition, the size, interval or number of the above-described grooves (not shown) can be adjusted according to the time for electrolysis or the concentration of the electrolyte solution 314a, so that the substance to be degraded can be efficiently decomposed.

Subsequently, in step (c), the surface property of the substrate is roughened through electrolysis to extract the substrate 300a having the groove portion (not shown) from the electrolyte solution 314a, and then immersed in pure water 316 again. Ultrasonic cleaning is performed by one washing means, and in step (d), the substrate 300a, which has been subjected to the above-described ultrasonic cleaning, is put into an electric furnace 318 and dried.

Thereafter, in step (e), the above-described substrate 300a is immersed in the anatase dispersion 320a in the titanium oxide solution tank 320 to coat the anatase dispersion 320a on the surface of the substrate 300a. Finally, in step (f), the substrate 300a coated with the above-described anatase dispersion 320a is introduced into the electric furnace 322 to be baked at a predetermined temperature for a predetermined time. This firing process is fired three times or more, that is, immersed in the anatase dispersion 320a and fired three times or more in the electric furnace 340, so that the titanium oxide is crystalline in a uniform thin film shape according to the surface of the substrate 300a. When coated with the (g) step, the photocatalyst member 300 is completed. At this time, since the titanium oxide is fixed in a thin film shape according to the surface shape of the substrate 300a, a plurality of minute grooves (not shown) are formed on the surface of the photocatalyst member 300 described above.

Herein, the process of sequentially forming the photocatalyst members according to the present invention will be partially enlarged as shown in FIGS. 4 to 6.

4 to 6 are enlarged views partially illustrating a process of sequentially forming the photocatalyst member of FIG. 3. First, the photocatalyst member according to the present invention is subjected to the process of electrolyzing the surface of the substrate and the process of coating the titanium compound in the form of a thin film on the surface of the electrolytic substrate as described above as shown in FIG. . Such a process of sequentially forming a photocatalyst member for photocatalytic decomposition of a substance to be degraded according to the present invention is as follows in FIGS. 4 to 6.

As shown in (a) of Figures 4 to 6, the photocatalyst member according to the present invention, first, the substrate 400a to which a predetermined metal oxide (400a ₁ , 500a ₁ , 600a ₁ ) is added to a steel (Steel) material , 500a, 600a) are prepared. Here, the above-described predetermined metal oxides 400a ₁ , 500a ₁ , 600a ₁ may be various metal oxides 400a ₁ , 500a ₁ , 600a ₁ , but have high purity nickel-chromium, which is a material resistant to heat and durability. Ni-Cr, 400a ₁ , 500a ₁ , 600a ₁ ) alloy is preferable.

The predetermined metal oxide _{(400a 1, 500a 1, 600a} 1) of a nickel-immersed in the chromium _{(400a 1, 500a 1, 600a} 1) is added substrate (400a, 500a, 600a), the water (not shown) When the substrate is washed and immersed in an electrolyte (not shown) to electrolyze the surfaces of the substrates 400a, 500a, and 600a, as shown in FIGS. 4 to 6 (b), the substrates 400a, 500a, and 600a may be The surface is formed with an uneven shape, and a plurality of minute grooves 400a ₂ , 500a ₂ , 600a ₂ called pit holes are formed on the surfaces of the substrates 400a, 500a, 600a described above.

4 to 6, the titanium compounds 410, 510, and 610 are added to the surfaces of the substrates 400a, 500a, and 600a on which the above-mentioned concave-convex shape is formed. Compounds 410, 510, and 610 are coated and fixed in a thin film form to cause strong electric force upon contact with a photocatalyst irradiator (not shown) to be described later to efficiently photocatalytically decompose the substance to be degraded.

The photocatalyst member (200 of FIG. 2) including the substrates 400a, 500a, and 600a and the titanium compounds 410, 510, and 610 according to the present invention formed as described above are provided in plural and twisted in a spiral shape having an uneven shape. It is formed so as to overlap each other. As a result, the surface area of the photocatalyst member (200 in FIG. 2) is enlarged, so that the contact area with the to-be-decomposed product can be widened, thereby making it possible to efficiently decompose the to-be-decomposed product.

In other words, since the light irradiated by the plurality of minute grooves 400a ₂ , 500a ₂ , 600a ₂ formed on each of the surfaces of the photocatalyst member 200 provided in the plural numbers described above, the photocatalyst member is diffusely reflected. The probability that light can reach each of the surfaces of (200 in FIG. 2) is increased, so that light can be irradiated to each of the photocatalyst members (200 in FIG. 2) efficiently, so that photocatalytic decomposition of a to-be-decomposed product can be performed efficiently.

Such a photocatalyst filter including a photocatalyst member according to the present invention is provided in a clean device for water quality and sterilization, which is an example. Referring to FIG. 7A and FIG.

7A and 7B are diagrams for illustrating an example in which a photocatalyst filter, which is an example according to the present invention, is provided in a cleaning device to efficiently perform photocatalytic decomposition. First, one example of the cleaning device 700 to which the photocatalyst filter according to the present invention is applied includes an outer wall 710, an inner wall 720, a photocatalyst member 740, a fan 750, a filter 760a and 760b, and an inlet. The unit 770, the outlet 780, and the photocatalyst irradiation unit 790 are provided.

One example of the cleaning device 700 to which the photocatalyst filter is applied is formed in a cylindrical shape and has a space for accommodating the photocatalyst member 740 between the outer wall 710 and the inner wall 720. Here, the outer wall 710 is made of a plastic tube of polyvinyl chloride resin of PVC material, and the inner wall 720 is made of a quartz tube.

In addition, a plurality of photocatalyst members 740 provided between the outer wall 710 and the inner wall 720 are filled. Since the photocatalyst member 740 is formed so as to be twisted and overlapped with each other in a spiral shape, the photocatalyst member 740 has a uniform gap between the photocatalyst members 740, and the gap is always maintained by the elastic force due to the shape of the photocatalyst member 740. .

In addition, an inlet 770 is provided at a predetermined position below the outer wall 710 so that fluid such as clean air or liquid can freely enter and exit. The fan 750 is installed at the inlet 770, and a filter 760a is installed between the fan 750 and the space where the photocatalyst member 740 is filled.

On the other hand, the outlet portion 780 of the fluid is installed on the upper side of the outer wall 710 opposite to the inlet portion 770. The outlet 780 is also provided with a filter 760b to discharge the fluid so that the substance to be decomposed and cleaned.

Finally, the photocatalyst irradiator 790 is disposed inside the inner wall 720 to irradiate a light source to the photocatalyst. The photocatalyst irradiator 790 may be a light source that emits a sufficient amount of light so as to irradiate light to the photocatalyst to efficiently decompose the substance to be photocatalyzed. Preferably, the photocatalyst irradiator 790 is a fluorescent lamp, a black light, At least one of a xenon lamp, a mercury lamp, a sodium lamp, and an incandescent lamp is used.

On the other hand, although not shown in order to more efficiently reflect the light, which is the light source irradiated from the photocatalyst irradiation unit 790 described above, a high efficiency reflector (not shown) may be disposed on the inner surface of the outer wall 710. As such a high efficiency reflector (not shown), an aluminum reflector manufactured by Aranoido Co., Ltd., which reflects light 99.99%, is mainly used.

One example of a clean device 700 employing a photocatalyst filter according to the present invention manufactured as described above includes a fluid containing a substance to be decomposed into an inlet 770 to be filtered through a filter 760a and a photocatalyst member 740. Enter the space with). When the fluid enters the space, the substance to be decomposed in the fluid decomposes according to the contact area of the photocatalyst member 740 containing a nickel-chromium (Ni-Cr) alloy which is a metal oxide.

At this time, since the light emitted from the photocatalyst irradiator 790 is directly irradiated through the inner wall 720 to the photocatalyst member 740 manufactured by adding the metal oxide to the above-described stainless material, the photocatalytic decomposition of the substance to be efficiently efficiently I can do it.

In addition, when the above-described high efficiency reflector (not shown) is disposed on the inner surface of the outer wall 710, the light emitted from the photocatalytic irradiator 790 is efficiently reflected to the photocatalyst member 740 and at the same time through the inner wall 720. Irradiation enables the photocatalytic decomposition of the substance to be degraded more efficiently.

Meanwhile, the fluid to be decomposed and cleaned through the above-described process is discharged through the filter 760b disposed at the outlet 780.

Here, the substrate (not shown) provided in the photocatalyst member 740 described above has light reflectivity as described above, and is not limited to efficiently decomposing the substance to be degraded. It is also possible to further include a light transmitting member (not shown) for transmitting light to efficiently decompose the substance to be degraded. When a part of the photocatalyst member 740 provided with a light transmitting member (not shown) is partially irradiated with light as a light source, the irradiated light passes through the portion to irradiate other portions of the photocatalyst member 740. As a result, the photocatalytic decomposition of the substance to be degraded can be performed efficiently.

In addition, the substrate (not shown) provided in the photocatalyst member 740 includes a nickel-chromium (Ni-Cr) alloy, which is a metal oxide having a property of reflecting light and having high heat resistance, durability, and high purity. Since it is manufactured by addition, it is not easy to deteriorate even when irradiated with light such as ultraviolet rays, and thus its lifespan is extended. Accordingly, the cleaning device using the photocatalyst member as a filter does not need to frequently replace the filter, thereby reducing manufacturing costs. In addition, production yields are improved.

Furthermore, as shown in FIGS. 8A and 8B, when a plurality of cleaning devices including a photocatalyst filter are installed in one rectangular plastic tube made of a plastic material, photocatalytic decomposition of a substance to be degraded can be performed in a large amount. It is possible to speed up the work of decomposing and purifying the substances to be degraded.

Here, the plurality of cleaning devices provided with the above-described photocatalyst filter can efficiently purify the cleaning device by adopting an alternative method, either in series or in parallel, according to the amount or degree of contamination to be purified.

In other words, the method for purifying wastewater material by adopting the above-described plurality of cleaning devices in series method, first, the wastewater material enters through the inlet 870 provided in one cleaning device, and enters the photocatalyst filter. The waste water material purified primarily by the gas enters the inlet part 870 provided in the other cleaning device connected through the outlet part 880, and the waste water material purified secondly by the photocatalyst filter is also discharged. By repeatedly connected to another clean device through the unit 880, the waste water material is purified. In this type of tandem method, although the processing speed for purifying wastewater material is slowed down, the wastewater material is repeatedly filtered, so that the wastewater material is purified more efficiently than the parallel method.

On the other hand, the method of purifying the waste water material by adopting the above-described plurality of cleaning devices in a parallel manner firstly enters the inlet portion 870 of each of the hearing devices equipped with the plurality of waste water materials at the same time. Each of the wastewater purified by the filter is discharged through the outlet portion 880, so that the processing speed for purifying the wastewater material is faster than the serial method but does not go through the step of filtering the wastewater material much. Wastewater substances are purged more than the method of.

Since the method of purifying the cleaning device according to the present invention has a contradiction relationship, it is only necessary to efficiently purify by adopting an alternative method described above in consideration of the amount of the material to be purified or the degree of contamination.

Here, one or more cleaning devices provided with the photocatalyst filter are provided in the wastewater purification device as one example, and the process of decomposing the decomposed substances is as follows.

FIG. 9 is a view illustrating a process in which the clean device shown in FIGS. 7A to 8B is provided in a wastewater purification device as one example, and is purified while the substances to be decomposed are decomposed. First, one example of the wastewater purification apparatus according to the present invention is composed of a distribution unit 900, an anaerobic unit 910, an anaerobic unit 920, an exhalation unit 930, the final sedimentation unit 940.

Looking at the process of filtering the waste water using the waste water purification apparatus as one example according to the present invention, when the waste water is introduced into the distribution unit 900 and there is no phosphorus (P) elution phenomenon of the anaerobic unit 910 The internal transport water 900a and 930a of the distribution unit 900 and the exhalation unit 930 and the external transport water 940c of the final settling unit 940 are respectively anaerobic parts by waste water pumps 900b, 930b and 940b. 910 is supplied to the oxygen-free portion 920, thereby increasing the denitrification effect. Thereafter, in the aforementioned exhalation unit 930, nitrification is generated and the nitrified internal transport water 900a and 930a and the external transport water 940c are supplied to the anoxic part 920 to remove nitrogen through the denitrification reaction, and the waste water is It is supplied to the final settling portion 940. At this time, the wastewater flowing into the final sedimentation unit 940 before being discharged to the river is filtered through the photocatalyst filter 940a of the clean device installed in the final sedimentation unit 940.

Such a clean device equipped with a photocatalyst filter 940a according to the present invention is made of a photocatalyst member 940a ₂ and a quartz tube, in which a metal oxide is added to an outer wall 940a ₁ made of a plastic tube and a stainless material. Since it is composed of an inner wall 940a ₃ , light emitted from a photocatalyst irradiator (not shown) is directly irradiated to the photocatalyst member 940a ₂ through the inner wall 940a ₃ , so that photocatalytic decomposition of the substance to be degraded can be efficiently performed. do.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is represented by the utility model registration claims to be described later rather than the detailed description, and the scope of utility model registration claims. All changes or modifications derived from meaning and scope and equivalent concepts should be construed as being included in the scope of the present invention.

As described above, the present invention improves the photocatalyst member provided in the photocatalyst filter to efficiently photocatalytically decompose the substance to be degraded, and at the same time reduces the manufacturing cost when applying a product of a clean device using the photocatalyst member as a filter. There is an effect to improve the yield.

Claims (9)

In the photocatalyst filter used for water quality and sterilization or atmospheric purification, A tubular photocatalyst irradiator provided to irradiate a light source to the photocatalyst; A substrate formed by adding a metal oxide to a steel material, positioned to surround a circumference of the photocatalyst irradiation part, and formed to have a plurality of minute grooves on a surface thereof; A photocatalyst filter containing a titanium compound, the photocatalyst comprising a photocatalyst coated on the surface of the substrate in a thin film so as to adsorb and decompose harmful substances on the surface of the substrate. The method of claim 1, The photocatalyst irradiator is at least one of a fluorescent lamp, a black light, a xenon lamp, a mercury lamp, a sodium lamp, and an incandescent lamp. The method of claim 1, The metal oxide is a photo-catalyst filter, characterized in that the nickel-chromium (Ni-Cr) alloy. The method of claim 1, The substrate has a shape of at least one of circular, spiral, and vortex type photocatalyst filters. The method of claim 4, wherein The substrate is a photocatalyst filter, characterized in that formed in plural. The method of claim 5, The substrate is a photocatalyst filter, characterized in that stacked on each other. delete The method of claim 1, The titanium compound is anatase (TiO ₂ ), characterized in that the photocatalyst filter. The method of claim 6, The substrate is a photocatalyst filter, characterized in that it further comprises a light transmitting member for transmitting light.

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