KR102285448B1 - The ceramic foaming sponge filter in which the optical catalyst is coated with deposition and the manufacturing method thereof - Google Patents

Abstract

The present invention relates to a ceramic foaming sponge filter deposited and applied with a photocatalyst which emits light to a ceramic foaming sponge by attaching UV-A, UV-B, and UV-C LED modules on four external surfaces of a square pillar shaped metal frame in a foaming ceramic filter of a photocatalyst deposited and applied cylindrical pipe shape. According to the present invention, contaminant removal performance can be improved by expanding a contact area of contaminated air.

Description

The ceramic foaming sponge filter in which the optical catalyst is coated with deposition and the manufacturing method thereof

In the present invention, UV-A, UV-B, UV-C LEDs are attached to the outer four sides of a metal frame in the shape of a square column inside a cylindrical pipe-shaped foamed ceramic filter coated with a photocatalyst to irradiate the ceramic foam sponge with light. It relates to a ceramic foam sponge filter coated with a photocatalyst, and more specifically, a ceramic powder or liquid phase is deposited on a foamed sponge and heat treated to make a pipe-shaped filter in the form of a foamed sponge, and then a photocatalyst material is deposited on the foamed ceramic. After that, the rectangular corner portion of the inner metal frame is provided with a gap forming part to be installed to maintain a predetermined distance inside the filter, and four beams of the UV-A, B, and C LEDs are each formed at a predetermined angle. It relates to a ceramic foam sponge filter formed in a structure and coated with a photocatalyst in which light is irradiated to the entire part of the filter.

The use of photocatalysts can be divided into application fields by function and application fields by industry using unique characteristics.

Most of the application fields are related to the environment, and there are many areas closely related to our daily life.

Because pollutants can be decomposed only with light without applying special energy to the earth's air and water pollution, photocatalysts can be used in sanitary problems, which are threatened by photodegradation of harmful organic substances, photooxidation and reduction of air pollutants, and increased resistance to various pathogens. Sterilization and antibacterial action can solve the problem simply, so it can be applied in many fields.

Specifically, in a photocatalyst, a reaction initiating and proceeding by an electromagnetic wave or light during a chemical reaction is referred to as a photochemical reaction. Although these photochemical reactions have various and complex reaction mechanisms depending on the type, it is a common process of all photochemical reactions regardless of the type of reaction, and the most important step is radiation energy from light sources including the sun. is to absorb

A photocatalyst refers to a compound that absorbs light energy to initiate a photochemical reaction and promotes a photochemical reaction as a catalyst. A typical photocatalyst is titanium dioxide (TiO2), which is used for photolysis of water to obtain hydrogen and oxygen gas.

The photocatalytic process of water decomposition and the use of fossil fuels such as coal, oil, and natural gas cause various environmental problems based on the greenhouse effect. throwing up the topic As one of the solutions, hydrogen gas (H2), which has a high potential in the market to the extent that it is called the so-called 'hydrogen economy', is attracting attention. This is because a large amount of thermal energy is generated through the combustion of hydrogen gas and the material produced at the same time is water, which is because it is a clean material (or fuel) that does not generate any material that does not deviate from environmental regulations in the process.

However, there are still several unresolved problems in using hydrogen gas, which is considered an ideal fuel, as an energy source, one of which is that the amount of hydrogen gas in the earth's atmosphere is not sufficient for human use as fuel. am. This means that it is necessary to generate hydrogen gas through a chemical process rather than capturing hydrogen gas in nature. has a

On the other hand, hydrogen gas can be generated by decomposing water through a semiconducting photoelectrode instead of a photocatalyst. A representative example of a photoelectrode used in this case is a TiO2 electrode, which is a wide band-gap semiconductor. When light is absorbed by the photoelectrode, electrons and holes are generated, and water is oxidized by the generated holes to generate oxygen gas. Electrons generated through photoelectrode absorption of light move to the platinum electrode to reduce hydrogen ions (H+, protons) into hydrogen gas to generate hydrogen gas.

However, the external configuration and shape for easy use of such a photocatalyst have not been developed, and ultraviolet rays cannot be uniformly transmitted to the position of the photocatalyst, so that sufficient contaminant removal cannot be achieved.

Korean Patent No. 2148123 Korean Patent No. 2050278 Korean Patent No. 2031698 US Patent No. 10175398 Korean Patent No. 1930709 Japanese Patent No. 5948178

The present invention has been made to solve the above problems, and the present invention is a photocatalyst of a foamed ceramic filter by attaching LEDs to the outer four sides of a metal frame of a rectangular column shape inside a pipe-shaped foamed ceramic filter coated with a photocatalyst by deposition. An object of the present invention is to provide a foamed ceramic photocatalyst filter that uniformly irradiates light in all directions with an uneven surface layer supported thereon.

In addition, the present invention makes a pipe-shaped filter in the form of a foamed sponge by depositing and applying a ceramic powder or liquid to a foamed sponge and heat-treating it, and the square corners of the inner metal frame are installed by maintaining a predetermined interval inside the filter. An object of the present invention is to provide a ceramic foam sponge filter having a gap forming part, the beam of the LED is formed in a structure formed at a predetermined angle, and a photocatalyst is deposited so that light is irradiated to the entire part of the filter.

In order to solve the above problems, the present invention provides an external ceramic foam sponge filter part having a space part inside which a photocatalyst is deposited and having a predetermined thickness in a cylindrical pipe shape; Inserted into the space portion and made of a gap forming part integrally formed to protrude outward in the longitudinal direction of the column-shaped metal frame and the metal frame, the inner LED coupling part including the LED formed between the gap forming part; include

The external ceramic foam sponge filter unit is manufactured by depositing and applying a ceramic powder or liquid to a foamed sponge, heat-treating the ceramic powder or liquid to form a shape, and depositing and applying a photocatalyst to the ceramic powder or liquid form.

The LED emits one of UV-A, UV-B, and UV-C light.

The beams of the UV-A, UV-B, and UV-C LEDs of the LED are spread at a predetermined angle.

The present invention comprises the steps of depositing and applying ceramic powder or liquid to a foamed sponge; forming a shape by heat-treating the ceramic powder or liquid phase; and depositing and applying a photocatalyst to the ceramic powder or liquid form.

The step of forming a shape by heat-treating the ceramic powder or liquid phase is a step of forming a cylindrical pipe shape with a space inside the photocatalyst deposited and coated.

The present invention comprises the steps of integrally molding the gap forming portion to protrude outward in the longitudinal direction of the metal frame; It further includes; attaching the LED formed between the gap forming part.

Manufacturing the inner LED coupling unit so that the corner portion of the rectangular pillar shape protrudes in a predetermined shape; It further includes; forming a "c"-shaped coupling part in the lower part of the predetermined shape, and attaching the LED module on which the LED is mounted between the coupling parts.

The present invention as described above can be used for air purification, water purification, bathroom (antibacterial and deodorization), indoor air purification, smoking room, air purifier, air conditioner, refrigerator, water purifier water tank, and the like.

In addition, the present invention can improve the pollutant removal performance by extending the contact area of the polluted air due to the carbon-titanium dioxide photocatalytic filter having photoactivity in the ultraviolet region and the pipe shape inducing the improvement of the photocatalytic activity.

In addition, the present invention is excellent in photocatalytic activity, and the effects of self-cleaning, deodorization, air purification, antibacterial action and pollution prevention are remarkable.

1 is a view showing the shape of an external ceramic foam sponge filter unit according to an embodiment of the present invention.
2 is a view showing an internal LED coupling unit according to an embodiment of the present invention.
3 is a view showing a state in which the external ceramic foam sponge filter unit and the internal LED coupling unit are combined according to an embodiment of the present invention.
FIG. 4 is a partially cutaway view of the internal structure of FIG. 3 .
FIG. 5 is a cross-sectional view of FIG. 3 .
6 is a view showing an angle beam angle of an LED according to another embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shape of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the gist of the present invention will be omitted.

The present invention is largely divided into an external ceramic foam sponge filter unit 10 and an internal LED coupling unit 20 .

As shown in FIG. 1 , the external ceramic foam sponge filter unit 10 has a space inside which a photocatalyst is deposited and is made in a cylindrical shape made of a ceramic foam sponge material having a predetermined thickness.

The external ceramic foam sponge filter unit 10 is manufactured by depositing and applying a ceramic powder or liquid to a foamed sponge, heat-treating the ceramic powder or liquid to form a shape, and depositing and applying a photocatalyst to the ceramic powder or liquid form.

The inner LED coupling part 20 is inserted into the space and consists of a column-shaped metal frame and a gap forming part 21 integrally formed to protrude outward in the longitudinal direction of the metal frame, and the gap forming part 21 ) and an LED 25 formed between them.

The LED 25 may use a UV-A, UV-B, or UV-C module, and may be selected and used for the purpose of removing contaminants or sterilization.

As an embodiment, in the case of the UV-A or UV-B LED 25 , the diffusion plate may be formed of a solid material such as borosilicate, Pyrex glass, and soda-lime glass. , a coating layer formed of a flexible material such as a hydrocarbon-based material, such as polyolefin, polyethylene, or polypropylene, may be formed on the diffusion plate.

As an example, the UV-C LED module used for sterilization is designed to emit short ultraviolet rays with a wavelength of 200 to 280 nanometers (nm), destroying the surface of an object or bacterial DNA and causing a chemical reaction with a special substance to sterilize It is used for curing devices, etc.

As another example of the present invention, the UV-C LED module is Wavelength 278nm, Forward Current 350 mA, Optical Power 100mW, Forward Voltage 7.0V, Beam Angle 120 Degree, or Wavelength 278nm, Forward Current 200 mA, Optical Power 200mW, Forward Voltage 30V, Beam Angle 120 Degree, Wavelength 278nm, Forward Current 350 mA, Optical Power 300mW, Forward Voltage 32V, Beam Angle 120 Degree.

As an embodiment, the internal LED coupling unit 20 may be formed in one of a circular shape, an elliptical pillar shape, and/or a rectangular pillar shape.

The internal LED coupling unit 20 attaches UV-A, B, and C LEDs to the outer surface of the metal frame of the LED coupling unit 20 in the shape of a square pillar inside the pipe-shaped foamed ceramic filter coated with photocatalyst deposition. do.

" 형상으로 돌출되어 상기 외부 세라믹 발포 스펀지 필터부(10) 내면에 밀착되어 고정된다.As shown in FIG. 2, the inner LED coupling unit 20 has a corner portion of a square pillar shape.

It protrudes in the shape of " and is fixed in close contact with the inner surface of the external ceramic foam sponge filter unit 10 .

" 형상은 상측부가 외부 세라믹 발포 스펀지 필터부(10)의 내면부에 접촉되어 내부 LED 결합부(20)를 지지하여 움직이지 않게 하고, 하측부에 "ㄷ"형상의 결합부가 형성되어, 상기 결합부들 사이에 상기 LED(25)가 실장된 LED모듈(25-1)을 부착한다.Also said "

" The upper part is in contact with the inner surface of the external ceramic foam sponge filter part 10 to support the internal LED coupling part 20 so that it does not move, and a "C"-shaped coupling part is formed in the lower part, the coupling The LED module 25-1 on which the LED 25 is mounted is attached between the parts.

As shown in FIGS. 3 and 4, when the edge of the inner LED coupling unit 20 protrudes and is fixed in close contact with the inner surface of the outer ceramic foam sponge filter unit 10, the light diffused from the LED 25 is As the external ceramic foam sponge filter unit 10 passes through the sponge-shaped hole including the ceramic material, the contact area is expanded, so that the contaminants can be easily removed.

As shown in FIG. 5, a heat dissipation passage is formed in the center of the internal LED coupling unit 20, and heat generated from the LED 25 is transferred to the outside through the heat dissipation passage to solve the heating problem and Manufacturing cost can also be reduced.

For example, a plurality of heat dissipation fins may protrude inside the cylindrical shape of the heat dissipation passage.

Meanwhile, as shown in FIG. 6 , the light emitted from the LED 25 is diffused at a predetermined angle to be uniformly irradiated to the entire portion of the external ceramic foam sponge filter unit 10 .

At this time, depending on the performance or the diffusion angle of the LED 25, there is a case that the entire area is not uniformly irradiated.

As an embodiment, the beam angle can be widened by attaching a lens to the LED 25 , and it is important that light is uniformly irradiated to the entire part of the filter as well as widening the beam angle.

The lens attached to the LED 25 is made of any one selected from glass, polycarbonate (PC), polymethyl methacrylate (PMMA), and cycloolefin copolymer (COC). can be provided.

As an embodiment, as shown in Figs. 7 and 8, the LED diffusion lens 25-2 attached to the LED 25 according to the present invention is optically transparent and has a property suitable for injection molding. Qualitative thermoplastic resin is adopted and used.

More preferably, a single resin or two or more selected from the group consisting of polycarbonate (Poly Carbonate, PC), polyvinyl chloride (Poly Vinyl Chloride, PVC) and acrylonitrile Butadiene Styrene (ABS) It may be a mixed composite resin.

As another embodiment, the LLED diffusion lens 25-2 is molded by injecting a reflector into an acrylic resin, performing a stirring process so that the reflector is evenly distributed, and then injecting an acrylic resin mixed with the reflector into a molding die (mold). is manufactured by

Therefore, as shown in FIG. 7, when only the LED 25 is attached to the inner LED coupling unit 20, the ultraviolet rays are spread at an α angle so that the ultraviolet rays do not reach the external ceramic foam sponge filter unit 10 as shown in FIG. It is not possible to see a sufficient photocatalytic effect.

However, when the LED diffusion lens 25-2 is used to spread ultraviolet rays at a β angle, a photocatalytic effect can be seen in all of the external ceramic foam sponge filter unit 10 as shown in FIG. 8 .

On the other hand, the photocatalyst is 50 to 300 parts by weight of a stabilizer selected from inorganic acids or mixtures thereof, 100 to 500 parts by weight of alcohol, 100 to 200 parts by weight of acrylic resin, 100 parts by weight of water, based on 100 parts _{by weight of TiO 2 dispersed in the form of nanoparticles.} In the titanium dioxide-based photocatalyst composition comprising ~ 800 parts by weight, any one of 300 to 500 parts by weight of an oxide of silicon oxide and aluminum oxide in the form of nano-particulates, platinum, palladium, silver, ruthenium, nickel, or cobalt One is a composition comprising 0.01 to 20 parts by weight.

Or the photocatalyst is an inorganic oxide; And characterized in that it is an inorganic oxide-based photocatalyst comprising a ferrocene-derived iron oxide layer formed on the inorganic oxide, wherein the photocatalyst contains a photocatalyst, characterized in that 0.5 to 2 wt% is contained in the synthetic resin, It is characterized in that the iron content in the ferrocene-derived iron oxide layer is 0.001 wt% or more and 6.91 wt% or less, or 6.93 wt% or more and 10 wt% or less, compared to the inorganic oxide, wherein the inorganic oxide is Ti, Zn, Al and Sn It is characterized in that it comprises at least one selected from the group consisting of oxides comprising at least one, and the inorganic oxide-based photocatalyst has photoactivity in a visible light region of 400 nm or more.

Therefore, when ultraviolet (UV) is transmitted from the above-described LED coupling unit 20 with the above-described photocatalytic material, electrons and electron holes are formed in the external ceramic foam sponge filter unit 10 .

At this time, electrons and electron holes move to the surface and combine with oxygen and hydroxyl groups, respectively, to generate _{hydroxy radicals (-OH) and superoxide anions (O 2 -) with strong oxidizing power.}

Thereafter, the generated hydroxy radical (-OH) and superoxide anion (O ₂ -) are attached to various contaminants contained in the air (A) and decomposed into _{water (H 2} O) and carbon dioxide (CO _{2 ).}

As such, since most contaminants are organic substances, they can no longer remain as harmful substances when they come in contact with superoxide anions or hydroxyl radicals.

Hereinafter, a method for manufacturing a ceramic foam sponge filter coated with a photocatalyst for carrying out the present invention will be described in detail.

First, a foamed sponge is prepared, and ceramic powder or liquid is deposited and applied to the foamed sponge.

In addition, the ceramic powder or liquid phase is heat-treated at a predetermined temperature to form a predetermined shape, preferably in a cylindrical pipe shape.

In addition, a photocatalyst is deposited and applied to the ceramic powder or liquid form.

At this time, the photocatalyst is selected from the group consisting of FeTiO ₃ , Fe ₂ Ti ₃ O9, Fe ₂ Ti ₄ O ₁₁ , Fe ₂ TiO ₄ , Fe ₂ TiO ₅ , Fe ₃ Ti ₃ O10, FeTi2.603O0.35 and FeTi5O10 _{A titanium oxide (TiO 2} )-titanite photocatalyst having a structure in which ferrite and titanium oxide, which are any one or a mixture thereof, are bonded may be used.

Or any one or more of beads and pellets supported with the photocatalytic material are used, and the photocatalytic material is titanium dioxide (TiO ₂ ) and strontium titanium trioxide (SrTiO ₃ ) and zinc oxide ( ZnO), cadmium sulfide (CdS), zirconium dioxide (ZrO ₂ ), vanadium trioxide (V ₂ O ₃ ), and tungsten trioxide (WO ₃ ) Any one or a mixture of one or more may be used.

In addition, the photocatalyst includes a metal oxide and metal particles, the metal oxide includes one selected from the group consisting of tungsten oxide, niobium oxide, and combinations thereof, and the metal particles include tungsten, chromium, vanadium, molybdenum, copper , iron, cobalt, manganese, nickel, platinum, gold, silver, cerium, cadmium, zinc, magnesium, calcium, strontium, barium, and combinations thereof, and the second binder is TEOS, Trimethoxy (methyl)silane, triethoxy(methyl)silane, and a thermosetting product of one sol selected from the group consisting of combinations thereof, wherein the adsorbent is selected from the group consisting of activated carbon, zeolite, apatite, alumina, silica, and combinations thereof may contain one.

Alternatively, the present invention sequentially includes a photocatalyst layer and an adsorbent layer, wherein the photocatalyst layer includes a first binder having hydrophilicity; and a photocatalyst, wherein the adsorbent layer comprises: a second binder; and a mixture of adsorbents, wherein the first binder is one selected from the group consisting of a titanium dioxide (TiO2) binder, colloidal silica, a silicon dioxide (SiO2)-based binder, alumina sol, zirconia sol, and combinations thereof. may include.

On the other hand, the cylindrical pipe shape is heat-treated with ceramic powder or liquid to have a space inside the photocatalyst deposited and coated, so that LEDs can be attached thereto.

Subsequently, the gap forming part 21 is integrally formed so as to protrude outward in the longitudinal direction of the metal frame.

And the LED 25 formed between the gap forming part 21 is attached.

" 형상으로 돌출되도록 제조하고, 상기 "

" 형상 하측부에 "ㄷ"형상의 결합부를 형성하고, 상기 결합부들 사이에 상기 LED(25)가 실장된 LED모듈(25-1)을 부착한다.At this time, the inner LED coupling portion 20 is a corner portion of the square pillar shape "

"Manufactured to protrude into the shape, and

A "c"-shaped coupling part is formed in the lower part of the " shape, and the LED module 25-1 on which the LED 25 is mounted is attached between the coupling parts.

Specifically, the external ceramic foam sponge filter unit 10 according to the present invention is an organic porous body having a three-dimensional network structure, impregnated with fine ceramic powder or liquid and a binder, dried, and heated to lose the organic porous body at the same time The fine ceramic powder or liquid particles are sintered to form an uneven surface layer made of ceramic particles having a three-dimensional network structure.

Then, by supporting the photocatalyst on the uneven surface layer of the ceramic porous body, a photocatalytic filter may be manufactured.

At this time, the photocatalyst is a photocatalyst composition comprising 50 to 300 parts by weight of a stabilizer selected from inorganic acids or mixtures thereof, based on 100 parts _{by weight of TiO 2 dispersed in nanoparticulate form, in addition to silicon oxide in nanoparticulate form,} A composition comprising any one of aluminum oxides.

In addition, it is preferable that the ceramic fine powder particles for the surface layer have an average particle diameter of 1 to 100 μm.

10: external ceramic foam sponge filter unit
20: internal LED coupling part
21: gap forming part
25 : LED
25-1: LED module

Claims (8)

An external ceramic foam sponge filter unit 10 having a space inside which a photocatalyst is deposited and coated, and having a predetermined thickness in a cylindrical pipe shape;
Inserted into the space portion and in the longitudinal direction of the column-shaped metal frame and the metal frame '

'Including a gap forming part 21, which protrudes outward in shape, is fixed in close contact with the inner surface of the external ceramic foam sponge 10, and is integrally formed, and an LED 25 formed between the gap forming part 21. A ceramic foam sponge filter coated with a photocatalyst including an internal LED coupling unit 20 . According to claim 1,
The external ceramic foam sponge filter unit 10 is manufactured by depositing and applying a ceramic powder or liquid to a foamed sponge, heat-treating the ceramic powder or liquid to form a shape, and depositing and applying a photocatalyst to the ceramic powder or liquid form. A ceramic foam sponge filter coated with a photocatalyst characterized by deposition. According to claim 1,
The LED 25 is a ceramic foam sponge filter coated with a photocatalyst, characterized in that it emits one of UV-A, UV-B, and UV-C light. delete depositing and applying ceramic powder or liquid to the foamed sponge of the external ceramic foaming sponge filter unit 10 having a predetermined thickness in a cylindrical pipe shape and having a space inside the photocatalyst is deposited;
forming a shape by heat-treating the ceramic powder or liquid phase, and depositing and applying a photocatalyst to the ceramic powder or liquid phase;
Prepare a metal frame and place the '

'Manufacturing the gap forming portion 21 so that the shape protrudes outward;
inserting and attaching the LED module 25-1, on which the LED module 25 is mounted, between the "c"-shaped grooves on both sides formed in the lower part of the gap forming part 21;
Inserting the metal frame into the inner surface of the external ceramic foam sponge filter unit 10 while coupling the LED module 25-1 on which the LED module 25 is mounted between the gap forming units 21 and fixing it in close contact. A method for manufacturing a ceramic foamed sponge filter coated with a photocatalyst comprising; 6. The method of claim 5,
Forming the shape by heat-treating the ceramic powder or liquid phase is a method of manufacturing a ceramic foam sponge filter coated with a photocatalyst, characterized in that the step of forming a cylindrical pipe shape having a space inside the photocatalyst coated by deposition. delete delete

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