KR20030030157A - Apparatus for eliminating the stench and volatile organic compounds in the polluted air - Google Patents

Abstract

PURPOSE: Provided is an apparatus for eliminating odor and volatile organic compounds in polluted air. CONSTITUTION: The apparatus comprises a polluted air inlet(51); a pretreatment chamber(55) with a filter therein, the pretreatment chamber(55) being coupled to the polluted air inlet(51) for intercepting dust from the polluted air; a photo oxidation chamber(59) coupled to an exit of the predetermined chamber(55) and having a plurality of guide plates(53a,53b) coated with TiO2 based photocatalyst and arranged to have a predetermined angle with respect to an air flow direction, and a plurality of ozone generating UV lamps(57) arranged to perpendicularly penetrate the guide plates(53a,53b) for removing odor and volatile organic compounds contained in the polluted air by a photo oxidation reaction and ozone oxidation reaction,; a posttreatment chamber(63) coupled to an exit of the photo oxidation chamber(59) and filled with ozone reaction catalysts for removing remained ozone in air passed out the optical oxidation chamber(59); and air exit hole(65) formed at a part of the posttreatment chamber(63).

Description

Apparatus for eliminating the stench and volatile organic compounds in the polluted air}

The present invention relates to a device for removing odor from contaminated air and treating volatile organic substances. More specifically, photo-oxidation reaction using TiO ₂ based photocatalyst and ozone oxidation by ozone generating UV lamp A device for treating contaminated air through a reaction.

In general, the air exhausted from commercial facilities such as various industrial facilities or restaurants are odorous, and contains a large amount of volatile organic substances (VOC) harmful to humans and the natural environment. Therefore, such contaminated air must be removed from the odor through a device capable of dealing with harmful substances, harmlessly treated with harmful volatile organic substances and then evacuated to the atmosphere.

Conventional polluted air treatment apparatuses have been using an activated carbon adsorption method or an oxidative adsorption method. However, the apparatuses using these methods have been large in size, high in cost, and unsatisfactory in their treatment results.

Accordingly, "Bio Climatic" in Germany has developed a device for removing odors and treating volatile organic substances in contaminated air by using UV photooxidation and ozone oxidation. The configuration of the air treatment unit is schematically illustrated. Looking at the configuration, the inlet (1) of the contaminated air, and a filter (3) having a pre-treatment chamber (5) for filtering dust particles; Ozone generating UV lamp (7) is installed across the air flow direction and the photooxidation chamber (9) for the photooxidation and ozone oxidation treatment of odor and volatile organic substances (VOC) in the contaminated air passed through the pretreatment chamber (5) Wow; It includes an adsorption means (11) filled with carbon and includes an adsorption chamber (13) and an exhaust port (15) for adsorption treatment of untreated materials in the air passing through the photoacidification chamber (9).

That is, in the contaminated air treatment apparatus, contaminated air passes through the pretreatment chamber 5 to filter dust particles, and odor and volatile organic compounds are decomposed and oxidized while passing through the photooxidation reaction chamber 9. After passing through 13), residual harmful substances are adsorbed and exhausted.

However, by the photooxidation and ozone oxidation reaction using only the UV lamp as in the treatment apparatus, the treatment efficiency of odor or volatile organic substances is only about 8 to 9%. Therefore, the adsorption chamber 13 is provided with the adsorption chamber 13 in order to remove most residual harmful substances which were not processed in the photooxidation reaction and the ozone oxidation reaction inevitably in the contaminated air treatment apparatus. This is following the existing method, which is not convenient for use, and the treatment efficiency is also low, and the adsorption means 11 for the carbon adsorption treatment has to be replaced every 2 to 3 months. It was a factor to increase.

Accordingly, an object of the present invention is to provide a contaminated air treatment apparatus that can maximize the efficiency of photooxidation reaction and ozone oxidation reaction using a photocatalyst in order to solve the problems as described above.

It is still another object of the present invention to provide a method and apparatus for treating polluted air, which does not require subsequent carbon adsorption treatment by improving the treatment efficiency of odor and volatile organic substances in photooxidation and ozone oxidation reactions.

Still another object of the present invention is to provide a method and apparatus for treating polluted air that can effectively treat ozone remaining after an oxidation reaction using ozone.

1 is a front sectional view schematically showing an apparatus for treating odor and volatile organic substances in a conventional polluted air;

2 is a front sectional view schematically showing an apparatus for treating odors and volatile organic substances of polluted air according to a first embodiment of the present invention;

3 is a cross-sectional plan view of the photocatalytic reaction chamber of the odor of polluted air and the volatile organic matter treatment apparatus of FIG.

4 is a front sectional view schematically showing an apparatus for treating odors and volatile organic substances of polluted air according to a second embodiment of the present invention;

FIG. 5 is a side cross-sectional view of the post treatment chamber of the apparatus for treating volatile organic matter and odor of contaminated air of FIG. 4.

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

51, 151: inlets 53a, 53b, 153a, 153b: filter

55, 155: pretreatment chamber 57, 157: ozone generating UV lamp

58, 158: guide plate 59, 159: photocatalytic reaction chamber

61, 161: ozone removal means 63, 163: aftertreatment chamber

65, 165: air outlet

The apparatus for treating malodorous and volatile organic substances of the polluted air of the present invention for achieving the above object is a contaminated air inlet; A pretreatment chamber connected to one end of the inlet and having a filter therein for filtering dust particles from the contaminated air introduced through the inlet; A plurality of guide plates connected to an outlet end of the pretreatment chamber and having a TiO ₂ photocatalyst applied therein are arranged in a plurality of rows in a horizontal and vertical direction while being inclined to have a predetermined angle with the air flow direction. A photovoltaic reaction chamber for installing a plurality of ozone generating UV lamps to vertically penetrate the odor and volatile organic substances (VOC) in the contaminated air passing through the pretreatment chamber; A post-treatment chamber connected to an outlet end of the photooxidation reaction chamber and equipped with an ozone removal means filled with an ozone reaction catalyst to remove residual ozone contained in air passing through the photooxidation reaction chamber; And an air outlet connected to the outlet end of the aftertreatment chamber.

The ozone removing means of the post-treatment chamber may be formed in a tray type consisting of one or more plates arranged at an angle, or a honeycomb type having a plurality of partitions in a horizontal or vertical direction transversely to form a plurality of cells. It may be formed as.

In addition, the filter provided inside the pretreatment chamber may include a first filter for filtering dust particles in contaminated air and a second filter for filtering fine dust particles.

In addition, the ozone reaction catalyst preferably includes MnO ₂ but is not limited thereto.

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

2 is a schematic cross-sectional view showing an apparatus for treating odors and volatile organic substances of polluted air according to the first embodiment of the present invention. Looking at the configuration in detail, the pretreatment chamber 55 is connected to one end of the inlet 51 into which the contaminated air is introduced, and the filters 53a and 53b are disposed inside the pretreatment chamber 55 across the flow direction of air. The dust particles are filtered while the contaminated air introduced through the inlet 51 passes through the filters 53a and 53b. At this time, the filter may be formed in a dual structure as shown, the first filter (53a) is formed to have the usual filter particles that can filter the dust of the normal size, the second filter 53b is finer than this It is preferable that the filter particles are formed to have finer filter particles than the first filter 53a to filter dust. This structure improves the physical purification efficiency prior to chemical treatment.

The photoacidification chamber 59 is connected to the outlet end of the pretreatment chamber 55, and the plurality of guide plates 58 are inclined to have a predetermined angle with the air flow direction in the photoacidification chamber 59. And it is arranged in a plurality of rows in the vertical direction, thereby extending the mixing effect and residence time of the contaminated air and can increase the contact area with the photocatalyst to improve the treatment efficiency.

A plurality of ozone generating UV lamps 57 are installed to vertically penetrate the guide plate 58. 3 shows a cross section of the plane of this photooxidation chamber 59. Each guide plate 58 is coated with a TiO ₂ -based photocatalyst (not shown).

In other words, the contaminated air passing through the pretreatment chamber 55 passes through the photooxidation reaction chamber 59 and the odor and volatile organic matter (VOC) are subjected to photooxidation and ozone oxidation, wherein the photooxidation reaction generated by the UV lamp is TiO. The reaction efficiency is improved by 10 times or more by the action of the _{second type} photocatalyst.

In addition, since the flow path of the air is extended by the guide plate 58, the reaction time is also extended, so that the treatment efficiency can be improved while reducing the installation area, and efficient treatment is possible even with a smaller number of UV lamps.

That is, the odor, volatile organic substances (VOC) and odorous substances are oxidatively decomposed and converted into harmless oxygen, carbon dioxide, or water instead of organic substances by the photooxidation and ozone oxidation.

In the present embodiment, three rows of guide plates are arranged horizontally, which may allow fewer or more rows to be arranged as needed, and also the vertical or horizontal width of each plate row may be determined differently as needed. Can be.

In addition, the coating surface coated with the TiO ₂ -based photocatalyst in the photooxidation reaction chamber 59 may be embossed or form protrusions of various shapes to increase the contact area.

An after-treatment chamber 63 (see FIG. 2) is connected to an outlet end of the photo-oxidation reaction chamber 59, and an ozone removing means filled with an ozone reaction catalyst containing MnO ₂ is formed inside the post-treatment chamber 63 ( 61).

In this embodiment, the ozone removing means is formed in a tray type consisting of one or more plates 61 arranged at an angle.

That is, unreacted ozone components remain in the air passing through the photooxidation reaction chamber 59, and the residual ozone reacts with the ozone reaction catalyst in the post-treatment chamber 63 and is converted into oxygen. The chemical formula below shows the reaction by the ozone reaction catalyst, manganese dioxide (MnO ₂ ) as an example.

2MnO ₂ + 5O ₃ → Mn ₂ O ₇ + 6O ₂

An air outlet 65 is connected to an outlet end of the aftertreatment chamber 63 to discharge the purified air into the atmosphere.

4 shows another embodiment of the present invention, in which the ozone removing means 161 of the aftertreatment chamber 163 is formed in a honeycomb type. That is, as shown in the side cross-sectional view of Figure 5 is formed to have a plurality of partitions (161a) in the horizontal or vertical direction across the interior to form a plurality of cells. This configuration has a disadvantage in that the production cost is increased and the durability is weak compared to the tray type of the first embodiment, but it may be advantageous depending on the use as it can improve the system safety and improve the processing efficiency during operation.

Since other components are used with the first embodiment and corresponding reference numerals, detailed description thereof will be omitted.

Looking at the operation of the odor of polluted air and the volatile organic matter treatment apparatus according to the present invention configured as described above are as follows.

First, the air introduced through the inlet 51 passes through the filters 53a and 53b in the pretreatment chamber 55, and physically filters the dust particles and fine dust particles. Volatile organic substances (VOCs) are decomposed by UV and oxygen-based active species, oxygen-based ions and photooxidation reactions and ozone oxidation reactions, and the efficiency of the photooxidation reaction is enhanced by the action of TiO ₂ photocatalysts coated on the respective guide plates. The material is converted to carbon dioxide, oxygen, or water, which is almost harmless.

It can be seen that the decomposition efficiency of organic materials into harmless materials using TiO ₂ -based photocatalyst in the photooxidation reaction chamber 59 is significantly improved than in the photooxidation reaction chamber 59 according to the prior art. In the case of the discharge air flow generated from powder coating, drying and coating gloss treatment) (after passing through the photooxidation chamber), only about 7-8% of the total volatile organic substances introduced in the conventional apparatus were treated, but in the apparatus according to the present invention, More than 80% of the treated, it was confirmed that more than 90% of the odor was removed.

As such, in the apparatus of the present invention, since the odor and volatile organic substances in the air contaminated in the photooxidation reaction chamber 59 are decomposed into almost harmless substances, the adsorption chamber required in the apparatus according to the prior art is not necessary, and thus maintenance is required. It is convenient and the cost is reduced.

In addition, in the apparatus of the present invention, since a post-treatment chamber having ozone removal means is connected to the outlet end of the photo-oxidation reaction chamber 59, air passing through the photo-oxidation reaction chamber 59 is ozone in the post-treatment chamber 63. Residual ozone is removed by the reaction catalyst and then exhausted.

As described above, the apparatus for treating polluted air according to the present invention uses a TiO ₂ -based photocatalyst in the process of photooxidation and ozone oxidation by an ozone generating UV lamp and simultaneously installs a plurality of guide plates inside the photooxidation reaction chamber. Significantly improved the conversion efficiency to harmless substances, and thus can treat polluted air without carbon adsorption.

In addition, this configuration can improve the treatment efficiency while reducing the size of the device, and can be applied to a wide range of applications from industrial large-volume polluted air treatment to small-volume polluted air treatment such as restaurants, and to facilitate maintenance. It also provides cost savings.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the above-described embodiments, and the general knowledge in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone with a variety of modifications are possible, of course, such modifications are within the scope of the claims.

Claims (6)

Polluted air inlets; A pretreatment chamber connected to one end of the inlet and having a filter therein for filtering dust particles from the contaminated air introduced through the inlet; A plurality of guide plates connected to an outlet end of the pretreatment chamber and having a TiO ₂ photocatalyst applied therein are arranged in a plurality of rows in a horizontal and vertical direction while being inclined to have a predetermined angle with the air flow direction. A photovoltaic reaction chamber for installing a plurality of ozone generating UV lamps to vertically penetrate the odor and volatile organic substances (VOC) in the contaminated air passing through the pretreatment chamber; A post-treatment chamber connected to an outlet end of the photooxidation reaction chamber and equipped with an ozone removal means filled with an ozone reaction catalyst to remove residual ozone contained in air passing through the photooxidation reaction chamber; And an air outlet connected to an outlet end of the aftertreatment chamber. 5. A device for treating malodorous and volatile organic substances (VOC) in contaminated air. According to claim 1, wherein the plurality of guide plates coated with the TiO ₂ photocatalyst of the photooxidation chamber is embossed to enlarge the contact area of the odor and volatile organic substances (VOC) in contaminated air Processing unit. 2. The apparatus of claim 1, wherein the ozone removing means of the aftertreatment chamber is formed in a tray shape consisting of one or more plates arranged at an angle. The method according to claim 1, wherein the ozone removing means of the post-treatment chamber is formed in a honeycomb type having a plurality of partitions that traverse the interior to form a plurality of cells. VOC) processing unit. The filter according to any one of claims 1 to 4, wherein the filter provided in the pretreatment chamber includes a first filter for filtering dust in the contaminated air and a second filter having fine particles for filtering fine dust. A device for treating malodorous and volatile organic substances (VOC) in contaminated air. 5. The apparatus of claim 1, wherein the ozone reaction catalyst comprises MnO _{2. 6} .