KR100478803B1 - Processing methode for air purification and equipment therefor - Google Patents

Abstract

The present invention relates to a method for treating air by using titanium dioxide (TiO ₂ ) photocatalyst and ultraviolet light and to a device therefor, wherein the specific gravity of the surface coated with ultraviolet lamp (8) and titanium dioxide (TiO ₂ ) in the transparent reactor is 0.01 A photocatalyst carrier (12) between -0.10 is filled into the reactor and fluidized by a blower (5) capable of circulating air provided in the lower part of the apparatus, and directly decomposes the volatile organic compounds in the air, thereby causing secondary pollution. It is a photochemical reaction air purification treatment method and a treatment apparatus, which does not generate toxic and also provides a bactericidal action and a deodorizing function, and a visual interior effect of harmful bacteria such as bacteria, viruses, and fungi.

In order to maximize the efficiency of the photochemical reaction, the present invention adopts a fluidization method of a photocatalyst rather than a stationary phase, and an ultraviolet lamp 8 used as an ultraviolet light source generates 253.7 nm germicidal rays and 184.9 nm anion and ozone generating wavelengths simultaneously. It is characterized in that the air purification treatment method and apparatus according to the decomposition treatment of contaminants contained in the contaminated air, providing the sterilization and deodorization function of harmful bacteria.

According to the present invention, in order to maximize the interior / lighting effect / photochemical reaction efficiency can be used as the air purification treatment apparatus of the inner circulation type (20, 30) and the outer circulation type (40).

The present invention is also effective in preventing building syndrome and confined building syndrome, which have recently emerged due to contaminated indoor air.

Description

Processing method for air purification and equipment therefor

The present invention relates to an air purification treatment method and apparatus according to the present invention for decomposing contaminants and harmful bacteria contained in air.

More specifically, the catalyst carrier 12 coated with a titanium dioxide (TiO ₂ ) photocatalyst is irradiated with ultraviolet rays of 253.7 nm and 184.9 nm while being fluidized by the hydrodynamic force of air generated by the blower 5. The volatile organic compounds (VOCs) in the air are transformed into harmless gases by photochemical reactions that are activated and received. And a method and apparatus for air purification treatment.

As the industry develops, environmental pollution problem becomes more and more serious, and regulations on pollutants are being tightened, and various methods for removing environmental pollutants have been devised according to this trend.

Conventional air purifying apparatus adopts a method of filtering or adsorbing and removing contaminants by a filter while forcibly circulating indoor air by driving a blower.

However, if the filter is blocked by contaminants, there is a disadvantage that the efficiency is lowered and causes a failure. Therefore, the troublesome problem of frequently disassembling the air purifier and cleaning the filter is present.

In particular, if the filter contaminated with contaminants are left for a long time, mold or bacteria inhabit the contaminants, causing odor, as well as acting as a source of air pollution, and in severe cases may also cause the onset.

In addition, the air purifier adopting a method of adsorbing pollutants in the air by using an adsorbent such as activated carbon does not perform any further adsorption when the adsorbent reaches its highest performance. The air purification treatment system does not have a regeneration function, so the inevitable replacement of the adsorbent is a situation that is also burdened with the replacement cost.

On the other hand, anion-type air purifier that generates negative ions by the negative ion generating device to remove odors, bacteria, cigarette smoke, etc. in the indoor air has a disadvantage of causing discomfort to the user by generating a unique odor.

In addition, in the ozone type air purifier that generates ozone by the ozone generator, when ozone exceeds a certain concentration, it is not only harmful to the human body. In general, ozone generation is performed by electrical high voltage discharge, so that nitrogen oxides (NOx, Problems such as the simultaneous generation of harmful substances such as SOx) and the safety of using high voltage.

Conventional volatile organic compounds (VOCs) treatment techniques include physical methods such as adsorption, absorption, and condensation, chemical methods using high temperature incineration, catalytic oxidation, and biological methods using biofiltration, etc., prior to discharge from the final outlet. have.

end. Condensation

It is mainly used to recover low-flow VOC containing high concentration such as VOC storage tank or reactor using organic solvent. VOC is recovered by using the difference of vapor pressure depending on temperature. As the cooling method, the existing mechanical cooling method was mainly used. However, the Cryogenic Condensation method, which cools and recovers VOC to -180F by using liquid nitrogen, is mainly used as the strengthening of regulation value.

I. Biofiltration

This method is a method of purifying biodegradable VOC or gaseous minerals through the membrane layer in which microorganisms live and can bring about 90% efficiency for low concentration of VOC treatment. Membrane layers include soil layers using soil and organic carriers depending on the material. The biofiltration method shows a good effect on the removal of contaminants such as alcohols, ethers, aldehydes, ketones, amines and sulfur compounds, but has been reported to have low decomposition efficiency for the removal of organic substances having a large amount of chlorine groups.

All. Regenerative Oxidizer (RTO)

Regenerative incineration is the high temperature combustion gas discharged through the combustion chamber passes through a heat storage layer to lose the heat retained in the heat storage layer is discharged through the incinerator stack as a low temperature gas. At this time, the VOC-containing gas flowing into the incinerator in the next cycle is preheated to a temperature slightly lower than the combustion chamber temperature while passing through the preheated layer of heat accumulator and then heated to the final combustion temperature by the burner while passing through the combustion chamber. This combustion air is discharged through another layer of heat accumulator and the VOCs are removed as these cycles alternate. This method is economical to treat large quantities of off-gases containing mainly low concentrations of VOC.

la. Regenerative Catalytic Oxidizer (RCO)

Similar to regenerative incineration, but using catalysts such as Pt, Cu, Cr, V, Ni, and Co, which enable incineration of VOC, and lowering the activation energy of waste gases, treating them at low temperatures in the range of 600-900F. Compared with 10-30% economics, 95-99% throughput can be achieved. However, this type of incineration is very sensitive to the characteristics of the waste gas and the presence of lead, tin, zinc, sulfur, etc. in the waste gas can reduce the activity of the catalyst to reduce the treatment efficiency.

However, due to the diversification of pollutants and the continuous generation of new pollutants in air pollution, existing simple treatment methods are facing limitations. In addition, the above-described conventional air purifying method and apparatus are not a method of decomposing the pollutant in the air, but generate a second pollutant by simple filtration or adsorption, and also have many problems in maintenance. Therefore, it is considered that advanced oxidation air purifying method of permanent catalyst and corresponding device should be devised which does not generate secondary pollution by directly decomposing air pollutants and does not require replacement of internal fillers.

Recently, the air purification method using the photocatalyst and ultraviolet light and the apparatuses thereof have been invented / designed. However, even if only the ultraviolet light is used or the photocatalyst is used, the immobilized photocatalyst coated or coated with a photocatalyst on some walls is filled with a simple stationary phase. Since all photocatalytic reaction sites are not irradiated, the efficiency of the photochemical reaction may be extremely low. And all the air purifiers do not have an interior effect has a problem that takes up a certain space.

Accordingly, the present invention has been proposed to solve the above problems according to the prior art, an object of the present invention is to use a volatile organic compound (VOC) contained in the air by using a photochemical reaction of titanium dioxide (TiO ₂ ) photocatalyst and ultraviolet light ) And air purifying treatment method and apparatus to get clean air after removing harmful bacteria / odors.

Features of the purification treatment method of the air purification treatment apparatus according to the present invention for achieving the above object,

In the air purification treatment method to prevent secondary pollutants by directly decomposing the pollutant in the air with harmless gas by adopting the photocatalyst / ultraviolet photochemical reaction method, which is an advanced oxidation method rather than a simple filter method,

The main case uses transparent materials such as acrylic resin and pyrex for interior / lighting effect.

For the maximum reaction efficiency of photochemical reaction, the fluidization method of the photocatalyst carrier 12 is adopted, which not only enhances the interior effect,

In order to maximize photochemical reaction efficiency and interior effect, the fluidized photocatalyst carrier 12 is circulated inside and outside the air purifier.

The UV lamp used as a light source adopts a high power short wavelength UV lamp (8) that can emit not only 253.7 nm germicidal line but also 184.9 nm wavelength region where anion and ozone are generated. To provide the efficacy of sterilization and odor removal.

Advanced oxidation using high oxidation power of OH radical (· OH) generated by photochemical reaction of photocatalyst / ultraviolet (UV) is secondary because it completely decomposes organic pollutants in air and aqueous solution into CO ₂ and H ₂ O. It does not cause contamination and has the advantage of removing biodegradable and hardly degradable contaminants.

Therefore, as a technology that can replace the existing environmental treatment process, a lot of researches and devices for advanced oxidation method have been devised.

The OH radicals generated in the advanced oxidation process react very well with almost all organic matters very quickly, which can be useful in the oxidation of hardly decomposable organic pollutants.

Among advanced oxidation methods, oxidation system using semiconductor metal compound such as titanium dioxide (TiO ₂ ) which is harmless to the human body and chemically stable as photocatalyst is able to treat air and wastewater which is difficult to treat by the prior art. It is recently attracting attention as an efficient method for removing hardly decomposable organic compounds.

The environmental treatment method using the photocatalyst has advantages such as easy operation and operation of the process and easy application to the environmental treatment process by ultraviolet rays currently used.

Therefore, the application field of the photocatalyst process having such an advantage can be said to be very broad.

The mechanism of photocatalytic oxidation by titanium dioxide (TiO ₂ ) and ultraviolet (UV) in the air and in aqueous solution is described. In the ultraviolet light emitted from the ultraviolet lamp (8), band gap energy (= 3.2) is applied to titanium dioxide (TiO ₂ ), a photocatalyst. Supplying higher light energy (wavelength <387.5nm) leads to the emission of electrons from the valence band of titanium dioxide, which is filled with electrons, and to the conduction band.

At the same time, positive holes are produced in the valence band of titanium dioxide. The excited electrons are superoxide radical (O ₂ ^- ·) to react with the electron acceptor oxygen is adsorbed onto the surface of the catalyst to produce a and the hydroxyl radical (OH ·) having a high oxidizing power reacts with superoxide radical is a water / water vapor molecules To generate,

At the same time, holes generated on the surface of TiO ₂ react with water molecules or hydroxyl ions adsorbed on the catalyst to produce hydroxyl radicals, or directly react with organic compounds to decompose organic compounds.

Both electrons and holes generated in the photocatalyst generate OH radicals by oxidation and reduction reactions. At this time, the generated OH radicals react with organic substances in the atmosphere and water in various forms to undergo decomposition.

As shown in Equation 1, OH radicals generated in the photocatalyst are removed by decomposing organic compounds in air and water into CO ₂ and H ₂ O as described above, and a series of photocatalytic oxidation mechanisms are also illustrated. It is as shown in FIG.

Organic Compound + OH Radical → H ₂ O + CO ₂

However, when the expensive TiO ₂ photocatalyst is used in the form of powder directly for the photocatalytic oxidation reaction, the TiO ₂ microparticles having a particle size of several μm to several mn are dispersed in the dust state, thereby separating and recovering TiO ₂ again. Problems on the

In order to solve the above problems, rather than directly using a titanium dioxide photocatalyst in the form of a powder, to obtain the maximum reaction efficiency by surface coating and fixing to a carrier having a certain particle size and density so as not to flow out from the air purification device, It would be reasonable to adopt a liquidation method instead.

In the carrier 13 to which the titanium dioxide (TiO ₂ ) photocatalyst is coated,

As an organic and inorganic compound such as expandable polystyrene (styrofoam) having a density of between 0.01-0.10 g / cm ³ that can be easily fluidized by the air stream generated by the blower 5 alone,

The particle size is about 1-10mm, which is optimal for fluidization conditions, and the photocatalyst 14 liquid in the sol state can be coated on the carrier 13 even at room temperature, which is currently on the market. By coating in the same manner as the impregnation method and curing at room temperature or medium temperature, the fluidized photocatalyst carrier 12 can be prepared.

It is possible to obtain a photocatalyst carrier having a high content of titanium dioxide (TiO ₂ ) while increasing the number of coatings.

A cross-sectional view of the titanium dioxide (TiO ₂ ) fluidized photocatalyst carrier 12 according to the present invention is shown in FIG. 2, where the titanium dioxide (TiO ₂ ) photocatalyst 14 is coated on the fluidized support 13.

In the present invention, to obtain a reaction efficiency similar to the photocatalytic oxidation reaction apparatus in the form of powder, and to visually pursue the interior effect, it was intended to apply a fluidized bed reactor that is significantly superior in mixing and transfer phenomena compared to other reactors.

The photocatalyst carrier 12 is also actively fluidized inside the air purifier, and frequently collides with the ultraviolet lamp 8 to prevent scale phenomenon such as contamination of the lamp surface.

In the present invention, the high power ultraviolet lamp 8 used as the light source is a high power short wavelength ultraviolet lamp that emits to a wavelength capable of generating anion and ozone, unlike a general germicidal ultraviolet lamp used in a conventional photocatalytic reaction. 8).

3 shows a wavelength range diagram of a high-power quartz UV lamp 8 according to the present invention.

As shown in Fig. 3, the general ultraviolet lamp emits a wavelength of 253.7 nm (light energy E = hc / λ = hυ = 478 mol / kJ), which is mainly a germicidal line,

The high power ultraviolet lamp according to the present invention is a quartz lamp that emits not only 253.7 nm wavelength but also a wavelength of 184.9 nm (E = hυ = 647 mol / kJ) capable of generating ozone from anion and moisture in the air.

The ultraviolet light of the strong light energy irradiated from the lamp not only disinfects / deodorizes harmful bacteria, but also decomposes organic pollutants of CC bonds and C = C bonds, and has a stronger light energy to the titanium dioxide (TiO ₂ ) photocatalyst (12). Was investigated.

Table 1 shows the bond and dissociation energy of several organic compounds (mol / kJ).

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the air purification treatment method and apparatus according to the present invention will be described.

4A and 4B are front and perspective views, respectively, of a first embodiment showing an air purification apparatus according to the present invention.

As shown in Figures 4a and 4b, the air purification apparatus 1 is a transparent material coated with titanium dioxide (TiO ₂ ) (for example, transparent acrylic resin, pyrex, glass, quartz, etc.) Titanium dioxide (TiO ₂ ) as a means of preventing leakage of the photocatalyst carrier 12 provided on the upper and lower portions of the main case 2, the air passage 4, and the base 3 of the main case _2. ) Photocatalyst carrier coated on the surface of stainless steel (6) (6 ') coated with titanium dioxide and titanium dioxide which receives active energy from ultraviolet lamp (8) and decomposes and removes contaminants in the air to obtain clean air. 12) and the light energy (λ <387.5 nm) higher than the band gap energy (3.2 eV) of the photocatalyst carrier 12, and the ultraviolet wavelength of the region capable of sterilizing / deodorizing harmful bacteria in the air. High power shortwave of quartz material with radiating ballast 10 and power supply means 9, 11 The long ultraviolet lamp 8, the air blower 5 for forming an air stream capable of fluidizing the photocatalyst carrier 12, and circulating the indoor air, the photocatalyst carrier 12 and the ultraviolet lamp ( It is composed of a separating / assembling means (7) of the main case (2) to enable easy replacement of 8).

The purification treatment method of the air purification treatment apparatus 1 according to the present invention configured as described above is as follows.

First, harmful bacteria such as viruses and fungi and volatile organic compounds (VOCs; for example, benzene, toluene, ethylbenzene, xylene, trichloroethene (TCE), isopropyl alcohol, acetone, chloroform, methanol, The air in the atmosphere containing the hardly decomposable pollutants of methyl ethyl ketone) is blown through the air passage 4 provided in the pedestal 3 by a blower 5 installed on the bottom of the air purifier 1, It flows into the transparent main key 2 of the air purification apparatus 1.

At this time, contaminants including volatile organic compounds in the air introduced into the air purification apparatus 1 are included in the main case 2 and fluidized by the airflow of air generated from the blower 5. It is in active contact with the photocatalyst carrier 12 which is fluidized).

Accordingly, the photocatalyst carrier 12 receives activation energy from the ultraviolet lamp 8 provided in the center of the main case 2, and causes chemical reaction to decompose contaminants contained in the air.

In particular, the density of said photocatalyst carrier (12) is a blower device ^{(5) 0.01g / cm 3 ~} 0.10g / cm 3 which can be readily fluidized (fluidization), with only hydrodynamic flow of air generated from.

In addition, the photocatalyst carrier 12 is sprayed with a sol photocatalyst 14 liquid in a sol state that can be coated at room temperature on a compound medium 13 such as expandable polystyrene of 1 mm to 10 mm that is optimal for fluidization conditions. It is preferable to coat by impregnation and to harden at room temperature and medium temperature.

On the other hand, the photocatalyst carrier 12 smoothly fluidizes inside the air purification apparatus 1 and further enhances the visual interior effect, and frequently collides with the ultraviolet lamp 8 to prevent deposition when the surface of the lamp is contaminated.

In addition, the ultraviolet lamp 8 installed vertically in the inner center of the air purifier 1 has a light energy higher than the band gap energy (3.2 eV) of the carrier 12 supplied to the air purifier. (λ <387.5 nm) is irradiated to maximize the photoreaction efficiency of the carrier 12 to rapidly decompose the hardly degradable contaminants contained in the air.

Here, the stabilizer 10 is provided inside the pedestal 3 for the stable power supply of the ultraviolet lamp 8.

In particular, the ultraviolet lamp 8 used as the light source is a high output short wavelength ultraviolet lamp 8 that emits to a wavelength capable of generating anion and ozone, unlike a general germicidal ultraviolet lamp used in a conventional photocatalytic reaction.

Here, the general ultraviolet lamp emits only a wavelength of 253.7 nm (light energy E = hc / λ = hυ = 478 mol / kJ) which is mainly a germicidal line, whereas the high power ultraviolet lamp 8 has not only a 253.7 nm wavelength but also anion and air. It is a quartz lamp that emits even a wavelength of 184.9 nm (E = hυ = 647 mol / kJ) that can generate ozone from moisture in the water.

Therefore, the ultraviolet light of the ultraviolet light 8 irradiates not only the sterilization / deodorization function of the harmful bacteria but also the organic contaminants of the CC bond and the C = C bond are decomposed, and the titanium dioxide (TiO ₂ ) photocatalyst carrier Stronger light energy was irradiated to (12).

Reference numerals 6 and 6 ′ denote stainless steels coated with a photocatalyst to prevent the photocatalyst carrier 12 from leaking out of the air purification apparatus 1.

Further, reference numeral 7 denotes a separating / assembling means of the main case 2 which provides an easy operation when replacing the photocatalyst carrier 12 and the ultraviolet lamp 8.

5 to 7 are schematic views of the second, third and fourth embodiments showing the air purification apparatus according to the present invention, respectively.

5 to 7, the internal circulation type air purification apparatus 20 and 30 and the external circulation type air purification apparatus 40 of the present invention will be described. 40 is the main case 21, 31, 42 of the transparent material coated with titanium dioxide (TiO ₂ ) (for example, transparent acrylic resin, pyrex, glass, quartz, etc.) Stand 3 provided with furnace 4 and air collecting means 31 in the atmosphere, and means for preventing leakage of photocatalyst carrier 12 provided in the upper and lower portions of the main cases 21, 31 and 42. Titanium dioxide (TiO ₂ ) coated stainless steel mesh (6) (6 ') and titanium dioxide which receives active energy from ultraviolet lamp (8) to decompose and remove pollutants in the air to obtain clean air Irradiates light energy (λ <387.5 nm) higher than the band gap energy (3.2 eV) of the photocatalyst carrier 12 coated on the photocatalyst carrier 12 and A high power short wavelength ultraviolet lamp 8 made of quartz and a photocatalyst carrier provided with a stabilizer 10 and a power supply means 9 and 11 for emitting ultraviolet wavelengths in a region capable of sterilizing / deodorizing harmful bacteria in the air. An air blower 5 for forming an air stream capable of fluidizing 12 and circulating indoor air, and an internal circulation means 22, 23 of the photocatalyst carrier 12 in FIG. 6, the inner circulation means 32, 33, 35, 36 of the photocatalyst carrier 12 and the outer circulation means 43, 44 of the photocatalyst carrier 12 in FIG. It consists of a discharge pipe 45 through which the purified air flows out.

The combination of the purifying treatment method of the inner circulation type air purifying apparatus 20 and 30 and the outer circulation type air purifying apparatus 40 according to the present invention configured as described above is as follows.

First, harmful bacteria such as viruses and fungi and volatile organic compounds (VOCs; for example, benzene, toluene, ethylbenzene, xylene, trichloroethene (TCE), isopropyl alcohol, acetone, chloroform, methanol, Air in the atmosphere containing hardly decomposable pollutants of methyl ethyl ketone) is supplied to the pedestal 3 in FIGS. 5 and 6 by a blower 5 installed at the bottom of the air purifying apparatus 20, 30. Through the provided air passage 4, through the air collecting means 41 in Figure 7, into the main keys 21, 31, 42 of the air purification apparatus 20, 30, 40 Inflow.

At this time, contaminants including volatile organic compounds in the air introduced into the air purifying apparatuses 20, 30, and 40 are included in the main cases 21, 31, and 42, and a blower apparatus ( It is in active contact with the photocatalyst carrier 12, which is fluidized by the air stream generated from 5).

Accordingly, the photocatalyst carrier 12 receives activation energy from the ultraviolet lamp 8 provided in the main cases 21, 31, and 42, and chemically decomposes pollutants contained in the air. .

In particular, the density of said photocatalyst carrier (12) is a blower device ^{(5) 0.01g / cm 3 ~} 0.10g / cm 3 which can be readily fluidized (fluidization), with only hydrodynamic flow of air generated from.

In addition, the photocatalyst carrier 12 is sprayed with a sol photocatalyst 14 liquid in a sol state that can be coated at room temperature on a compound medium 13 such as expandable polystyrene of 1 mm to 10 mm that is optimal for fluidization conditions. It is preferable to coat by impregnation and to harden at room temperature and medium temperature.

On the other hand, the photocatalyst carrier 12 is smoothly fluidized in the air purification apparatus 20, 30, 40, and further enhances the visual interior effect, and frequently collides with the ultraviolet lamp 8 to deposit when the surface of the lamp is contaminated. Prevent the phenomenon.

In addition, the ultraviolet lamp 8 installed vertically / horizontally inside the air purifiers 20, 30 and 40 has a band gap energy of the carrier 12 supplied to the air purifier. By irradiating higher light energy (λ <387.5 nm) than 3.2 eV), the photoreaction efficiency of the carrier 12 is maximized to rapidly decompose the hardly degradable contaminants contained in the air.

In particular, the ultraviolet lamp 8 used as the light source is a high output short wavelength ultraviolet lamp 8 that emits to a wavelength capable of generating anion and ozone, unlike a general germicidal ultraviolet lamp used in a conventional photocatalytic reaction.

Here, the general ultraviolet lamp emits only a wavelength of 253.7 nm (light energy E = hc / λ = hυ = 478 mol / kJ) which is mainly a germicidal line, whereas the high power ultraviolet lamp 8 has not only a 253.7 nm wavelength but also anion and air. It is a quartz lamp that emits even a wavelength of 184.9 nm (E = hυ = 647 mol / kJ) that can generate ozone from moisture in the water.

Therefore, the ultraviolet light of the ultraviolet light 8 irradiates not only the sterilization / deodorization function of the harmful bacteria but also the organic contaminants of the CC bond and the C = C bond are decomposed, and the titanium dioxide (TiO ₂ ) photocatalyst carrier Stronger light energy was irradiated to (12).

However, negative ions and ozone generated from the ultraviolet lamp 8 may cause discomfort or harmful effects on the human body.

Therefore, in the present invention, the anion and ozone components generated from the ultraviolet lamp 8 are sufficiently in contact with and reacted with the photocatalyst carrier 12 and the pollutant in the air, thereby increasing the reaction efficiency and preventing leakage to the outside.

In order to achieve the above object, the internal circulation means 22, 23, 32, 33, 35 and 36 of the photocatalyst carrier 12 in FIGS. 5 and 6 and the photocatalyst carrier 12 in FIG. External circulation means (43) (44).

Here, reference numeral 22, 32, and 42 denote a riser through which the photocatalyst carrier 12 is lifted / transferred, and reference numeral 23, 33, and 44 denote gravity to cause the elevated photocatalyst carrier 12 to be recycled. A slanted plate / tilt tube to be collected, and reference numeral 35 denotes a horizontal transfer tube through which the raised photocatalyst carrier 12 is horizontally provided, and the lowering means 36 of the photocatalyst carrier is provided, and reference numeral 43 denotes an elevated photocatalyst carrier 12. It is a down-comer that will descend to allow external circulation.

In particular, in the inner / outer circulation means, the pressure load in the risers 22, 32 and 42 is determined by the inclined plates 23, 33 and the inclined tube 44 in which the photocatalyst carrier 12 is collected. Maintained lower than the pressure load to allow the photocatalyst carrier 12 to be smoothly circulated inside and outside the air purification apparatus 20, 30, 40.

Therefore, the air purifying apparatuses 20, 30 and 40 provided with the inner circulation means 22, 23, 32, 33 and the outer circulation means 43, 44 as described above are ultraviolet lamps ( The anion / ozone component generated from 8) is sufficiently reacted with the air source / photocatalyst carrier 12 to prevent leakage to the outside and further enhances the visual interior effect.

Reference numerals 6 and 6 ′ are stainless networks coated with a photocatalyst to prevent the photocatalyst carrier 12 from leaking out of the air purifying apparatuses 20, 30, and 40.

Further, reference numerals 24 and 34 denote caps of the air purification apparatuses 20 and 30 provided with an air outlet, and reference numeral 45 denotes a discharge pipe through which the purified air is discharged to the outside.

8 is a configuration diagram of a fifth embodiment showing the air purification apparatus according to the present invention.

Referring to FIG. 8, the factory / industrial air purification apparatus 50 of the present invention will be described. The air purification apparatus 50 may include a main case 52 made of a solid material (eg, steel, stainless steel, PVC, etc.). And a stainless steel net coated with titanium dioxide (TiO ₂ ) as means for preventing leakage of the photocatalyst carrier 12 provided in the upper and lower portions of the air collecting means 51 and the main case 52 in the atmosphere. (6 '), photocatalyst carrier 12 coated with titanium dioxide on the surface thereof to receive active energy from ultraviolet lamp 8 to decompose and remove contaminants in the air to obtain clean air; and photocatalyst carrier 12 Ballast (10) and power supply that irradiate light energy (λ <387.5 nm) higher than band gap energy (3.2 eV) and irradiate ultraviolet wavelengths in areas that can sterilize / deodorize harmful bacteria in the air High power short wavelength ultraviolet lamp 8 of quartz material with means 9, 11 It is formed an air flow which may astute the photocatalyst carrier 12 is fluidized (fluidization) and as well as consists of a discharge pipe 53 that circulates air and that the air blowing device (5), a clean purging air outlet.

The purification treatment method of the factory / industrial air purifying apparatus 50 according to the present invention configured as described above is as described with reference to FIGS. 4 to 7.

As described above, according to the present invention, a photochemical reaction between titanium dioxide (TiO ₂ ) photocatalyst and ultraviolet light decomposes pollutants such as organic compounds in the air in a short time to obtain clean air easily, and to provide a fluidization method of the photocatalyst carrier. In addition, the air purification efficiency can be improved, and the visual interior effect can be reduced, thereby reducing the site of the existing air purification system.

In addition, the anion and ozone component that was a concern in the existing advanced air purification method, in the present invention to prevent the outflow of the anion / ozone component to the outside through the circulation method of the photocatalyst carrier to the maximum. And because the basic principle is simple, low cost and simple installation, it is easy to increase the size of the industrial type, it can replace the existing complex air treatment equipment.

Therefore, according to the present invention, it is very effective in preventing the building syndrome and the closed building syndrome, which are emerging due to the recently contaminated indoor air.

1 is a view showing a general photocatalytic photochemical reaction mechanism,

2 is a cross-sectional view of a fluidized photocatalyst carrier coated on a TiO ₂ surface according to the present invention;

3 is a view showing a wavelength range diagram of a high power short wavelength ultraviolet lamp according to the present invention;

4A is a front view of a first embodiment showing an air purifying apparatus according to the present invention;

4b is a perspective view of a first embodiment showing an air purification apparatus according to the present invention;

5 is a configuration diagram of a second embodiment showing the internal circulation air purification apparatus according to the present invention;

6 is a configuration diagram of a third embodiment of the internal circulation air purifying apparatus according to the present invention;

7 is a configuration diagram of a fourth embodiment showing an external circulation type air purifying apparatus according to the present invention;

8 is a configuration diagram of a fifth embodiment showing an industrial air purification apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

1. Air Purification System 5. Fan

8. UV lamp 10. Ballast

12. Titanium dioxide fluidization carrier 22. Internal riser of photocatalyst carrier

42. Photocatalyst carrier riser 43. External circulation tube

Claims (4)

In the air purification method using a photochemical reaction to treat the polluted air containing harmful bacteria and volatile organic compounds, The ultraviolet lamp 8 is installed inside the main case of the transparent material to fluidize the polluted air introduced by the blower 5 to the surface of the photocatalyst carrier 12 coated with ultraviolet and titanium dioxide (TiO ₂ ). In order to decompose / sterilize the pollutant, light energy (λ <387.5 nm) higher than the band gap energy of the carrier is irradiated to decompose the pollutant contained in the air by fluidization and photochemical reaction of the carrier. Air purification treatment method. 2. A high power short wavelength ultraviolet lamp (8) according to claim 1, wherein a high power short wavelength ultraviolet lamp (8) which simultaneously generates a 253.7 nm germicidal line and an anion / ozone generating wavelength of 184.9 nm as a light source is installed therein horizontally and vertically, The photocatalyst carrier 12, which is irradiated with ultraviolet light from the light source and obtains active energy, is fluidized by airflow inside the main case, In order to prevent the photocatalyst carrier from leaking out of the main case, the photocatalyst coated stainless nets 6 and 6 'are respectively installed on the upper and lower portions and the air outlet portion. Internal circulation means (22, 23, 32, 33) of the carrier for maximizing the photochemical reaction efficiency and further enhancing the interior effect by minimizing the residual discharge concentration of the anion / ozone component generated from the ultraviolet lamp (8) and A method for purifying air, characterized by decomposing a pollutant contained in the air by photochemical reaction while circulating the photocatalyst carrier by external circulation means (43, 44) to obtain clean air. The air purification treatment method according to claim 2, wherein the photocatalyst carrier has a density of 0.01 g / cm ³ to 0.10 g / cm ³ and a size of 1 mm to 10 mm. In the air purifying apparatus using a photochemical reaction to treat polluted air containing harmful bacteria and volatile organic compounds, Inside the main case of transparent material, a high power short wavelength ultraviolet lamp (8) which generates 253.7 nm germicidal line and 184.9 nm anion / ozone-generating wavelength at the same time is installed horizontally and vertically. The photocatalyst carrier 12 having a density of 0.01 g / cm ³ to 0.10 g / cm ³ and a size of 1 mm to 10 mm coated with titanium dioxide (TiO ₂ ) obtained by irradiating ultraviolet light from the light source and obtaining active energy is main Inside the case is fluidized by the airflow of air generated from the blower (5), In order to prevent the photocatalyst carrier from leaking out of the main case, the photocatalyst coated stainless nets 6 and 6 'are respectively provided on the upper and lower portions and the air outlet portion. Internal circulation means (22, 23, 32, 33) of the carrier for maximizing the photochemical reaction efficiency and further enhancing the interior effect by minimizing the residual discharge concentration of the anion / ozone component generated from the ultraviolet lamp (8) and Air purifying apparatus, characterized in that by decomposing the pollutant contained in the air by photochemical reaction while circulating the photocatalyst carrier by the external circulation means (43, 44) to obtain clean air.