KR20140077426A - Device for Deodorizing Using Ozone and Catalyst - Google Patents

Abstract

The present invention relates to a malodor removing apparatus using ozone and a catalyst. This is a malodor removing apparatus (10) for removing malodorous components by introducing malodorous gas to remove the malodorous components by using ozone and a catalyst. The odorous gas containing malodorous components is introduced and treated with ozone to remove the residual ozone component An ozone treatment unit 12 for discharging residual odor components, ozone and malodorous components as a mixed gas of volatile organic compounds, which are intermediates produced by reacting; A catalyst layer 143 for catalytically reacting and discharging the residual ozone component, residual odor component, and volatile organic compound in the gas treated in the ozone treatment section 12, and a catalyst layer 143 for releasing the temperature inside the catalyst section 14 from room temperature to 150 And a catalyst part (14) having a heater (147) capable of raising the temperature to ~ 300 ° C. Thus, by periodically treating the catalyst layer at a high temperature, it is possible to regenerate the function of the catalyst layer by oxidizing and removing the intermediate substance generated in the ozone treatment by adsorbing to the catalyst layer, thereby improving odor treatment efficiency.

Description

Device for Deodorizing Using Ozone and Catalyst

The present invention relates to a technique for removing odor, and more particularly, to a technique for removing odor from a food waste, for example, a deodorization method in which ozone is firstly treated with ozone, The present invention relates to a deodorizing device using a new ozone and a catalyst, which can improve the efficiency of the deodorizing treatment by regenerating the function of the catalyst layer by adsorbing an intermediate generated during ozone treatment to the catalyst layer by periodically treating the catalyst layer at a high temperature.

In general, various methods are known for reducing odors generated from industrial waste, waste garbage, and the like, and a method of using ozone and a catalyst among them is known as a method of low initial facility investment and maintenance cost.

For example, a registered publication of the Korean Patent Registration No. 10-0842100 (registered on June 23, 2008) entitled " Method for treating volatile organic compounds and odors by a hybrid system of ozone / ultraviolet ray / catalyst " A malodor processing system such as the system illustrated in Fig. 1 is disclosed. According to this system, odor gas is introduced, then passed through the ozone generator, and then passed through the ultraviolet module unit and the catalyst module unit to purify the odor. As the odor gas passes through the ozone generator, volatile organic compounds and the like in the odor gas chemically react with the ozone to generate intermediates, which can generate more intermediates while passing through the ultraviolet module section. Then, the odor could be purified by allowing these intermediates to be decomposed by the catalyst into carbon dioxide and water while passing through the catalyst module portion.

However, in the conventional odor removing system using ozone and catalyst, since all contaminants are not completely changed into carbon dioxide and water at the stage of treatment in the catalyst layer, water and a large amount of reaction intermediate material are adsorbed on the catalyst layer. The adsorbed moisture and substances deteriorate the deodorizing function of the catalyst layer, so that there is a problem that the efficiency of reducing the odor of the entire system is lowered.

Therefore, in a malodor reduction technique using ozone and a catalyst in order to reduce the odor generated in industrial waste and waste of garbage, etc., it is possible to regenerate the deodorizing function of the catalyst layer by removing water and reaction intermediate material adsorbed in the catalyst layer, There is an urgent need for a technique that can improve efficiency.

The present invention has been made in order to overcome and solve the problems of the prior art described above and to provide various additional advantages. The present invention relates to a malodor removal system for treating odorous components discharged from food waste first with ozone and secondarily treating residual odor and odor components through a catalyst layer, And an object of the present invention is to provide a deodorizing device using a new ozone and a catalyst capable of regenerating the function of the catalyst layer by oxidizing and removing the intermediate which is adsorbed on the catalyst layer to improve the efficiency of the odor treatment.

The above object is achieved by an odor removing apparatus using ozone and a catalyst provided according to the present invention.

A malodor removing apparatus using ozone and a catalyst provided according to an aspect of the present invention is a malodor removing apparatus for introducing malodorous gas to remove a malodorous component by using ozone and a catalyst and then discharging the purified gas, And an ozone treatment unit for treating the ozone gas as a mixed gas of a residual ozone component, a residual odor component, and a volatile organic compound, which is an intermediate substance generated by reaction of ozone and odor component; A catalyst layer for catalytically reacting and discharging residual ozone component, residual odor component, and volatile organic compound in the gas treated in the ozone treatment section, and a heater capable of raising the temperature inside the catalyst section from 150 to 300 ° C from room temperature And a catalytic portion having a catalyst layer.

In one embodiment, the ozone treatment unit may include an ultraviolet lamp that emits ultraviolet rays of a UV-C band having a wavelength of 100 to 280 nm, and may be configured to generate ozone by ultraviolet rays emitted from the ultraviolet lamp. have.

In another embodiment, the catalyst layer may be a hopcalite catalyst or a silver halide impregnated catalyst.

In another embodiment, the catalytic portion may further include a heater disposed on an upstream side of the catalyst layer, and a malodorous concentration layer disposed between the catalyst layer and the heater, wherein the malodor- The residual odor component and the volatile organic compound may be selectively adsorbed and desorbed when the temperature is 150 to 300 ° C.

And in yet another embodiment, the odor concentrate layer may comprise at least one component of hydrophobic zeolite, beta zeolite, USY zeolite, and ZSM-5 zeolite.

According to the present invention having the above-described configuration, for example, in a malodor removal system in which odor components discharged from food waste are first treated with ozone, and residual ozone and odor components are secondarily treated through the catalyst layer, , The intermediate layer generated during the ozone treatment is adsorbed on the catalyst layer and is oxidized and removed to regenerate the function of the catalyst layer, thereby improving odor treatment efficiency.

1 is a schematic view for explaining a configuration of a malodor reduction system using ozone and a catalyst.
FIG. 2 is a schematic side view showing an appearance of a malodor removing apparatus using ozone and a catalyst according to an embodiment of the present invention; FIG.
3 is a schematic cross-sectional view illustrating an internal configuration of a malodor removing apparatus using ozone and a catalyst according to an embodiment of the present invention.

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

The malodor removing apparatus using ozone and catalyst provided according to the embodiments of the present invention is a malodor removing or odor purifying apparatus for removing malodorous components using ozone and catalyst by introducing malodorous gas and discharging the purified gas .

2 and 3, the malodor removing apparatus 10 according to the present invention has a structure in which the ozone treatment section 12 and the catalyst section 14 are connected to each other by a transfer tube 13.

And may include a power supply for supplying power to the ozone treatment unit 12 and the catalytic unit 14 and a control unit for controlling the ozone treatment unit 12 and the catalytic unit 14 although not shown in the drawings and may optionally and additionally contain odor gas and / And a blowing fan (not shown) for introducing and / or exhausting the gas.

As shown in the drawing, the ozone treatment section 12 can be connected to the upper surface of the inflow pipe 11 through which the malodorous gas flows. The inflow pipe 11 can be used, for example, for crushing food waste, To the waste food processing apparatus for decomposition or drying. The odor gas at a constant flow rate can be introduced into the ozone treatment unit 12 by the blowing fan operating at a constant speed through the inflow pipe 11. [

According to the present invention, the malodor gas first reacts with the ozone generated in the ozone treatment unit 12. The ozone treatment section 12 may have a plurality of ultraviolet lamps 123 provided in a long hollow cylindrical case 121 along a gas flow direction (direction from the top to the bottom in the ozonation section in the illustrated example).

The ultraviolet lamp 123 is preferably a UV-C lamp that emits ultraviolet rays in the UV-C band having a wavelength of 100 to 280 nm. In general, ultraviolet light (UV) refers to light having a wavelength of 400 to 100 nm. Light having a wavelength of 400 to 315 nm is referred to as UV-A, and light having a wavelength of 315 to 280 nm is referred to as UV-B And a light having a wavelength of 280 to 100 nm is referred to as UV-C. The UV-C band of 280-100 nm in sunlight corresponds to ultraviolet rays that react with oxygen in the stratosphere of the earth's surface to generate ozone. UV-C lamps are capable of generating ozone in the air by emitting UV-C ultraviolet rays, and many commercially available products are known.

The odor gas flowing into the ozone treatment unit 12 reacts with ozone generated by the ultraviolet ray UV-C emitted from the ultraviolet lamp 123. As a result of the reaction between the odor gas and the ozone, a residual ozone component, a residual odor component, and a volatile organic compound, which is an intermediate material produced by the reaction of the ozone and the odor component, are mixed, and the mixed gas is discharged from the ozone treatment unit 12 . Here, the volatile organic compound may include an intermediate material containing C-H, C = O, COO- group, and the like.

The mixed gas generated after the odor gas reacts with the ozone in the ozone treatment section 12 is transferred from the ozone treatment section 12 through the transfer pipe 13 to the catalyst section 14.

The transfer pipe 13 is a generally U-shaped pipe, and communicates the lower surface of the cylindrical ozone treatment portion 12 and the lower surface of the cylindrical catalyst portion 14 with each other.

The catalyst section 14 may include a catalyst layer 143, a malodorous concentration layer 145, and a heater 147 in an empty case 141 having a generally cylindrical shape.

The catalyst layer 143 is a part for catalytically reacting and treating the residual ozone component, residual odor component, and volatile organic compound in the mixed gas discharged from the ozone treatment section 12 as a purifying gas.

According to a preferred embodiment of the present invention, the catalyst layer 143 may be made of a hopcalite catalyst or a catalyst impregnated with silver in hopcalite. The catalyst layer 143 may be formed by filling the catalyst layer with a predetermined space so that the catalytic component is made of pellets so that gas can pass through, or may be coated on the porous surface of the porous metal or metal honeycomb.

Among the catalyst components, hopcalite is a mixed catalyst mainly composed of manganese dioxide and copper (II) oxide and can further contain a small amount of metal oxides. It is effective to remove contaminants such as odor, ozone, carbon monoxide and formaldehyde Have. In particular, hopcalite can remove amines, aldehydes, trimethylamines and the like at a low temperature or a room temperature, and can accelerate oxidation of various organic compounds at a high temperature of, for example, 200 to 500 ° C.

The use of silver impregnated Hopcalite as a catalyst component can provide the advantage that the removal efficiency of ozone at room temperature is higher than Hopkalite.

In addition to the catalyst layer 143, a malodorous concentration layer 145 may further be provided. The odor concentration layer 145 may be a metal honeycomb coated with a hydrophobic zeolite component. More preferably, the odor concentration layer 145 may be a metal honeycomb coated with at least one of beta zeolite, USY zeolite, and ZSM-5 zeolite. These zeolite components adsorb odorous components or volatile organic compound components even in a humid atmosphere at room temperature and desorb these components in a high temperature atmosphere of about 150 to 300 ° C.

The heater 147 may be an electrically operated hot wire or other heat source capable of raising the temperature inside the catalyst section 14 from room temperature to 150-300 占 폚. According to the present invention, the heater 147 periodically controls the temperature in the catalyst section 14 to 150 to 300 占 폚, preferably about 250 占 폚, for example, every 30 minutes for about 2 minutes by a control section (not shown) Lt; / RTI >

In the illustrated example, the gas introduced into the lower surface of the catalyst portion 14 passes through the space in which the heater 147 of the most upstream is installed, passes through the middle odor concentration layer 145, and finally passes through the downstream catalyst layer 143 And then discharged through the exhaust pipe 15 connected to the upper surface of the catalytic portion 14 as a purifying gas.

According to the malodor removing apparatus 10 according to the present invention configured as described above, for example, the malodorous gas generated from the food waste disposal apparatus is treated first with ozone, then secondarily with the catalyst, And the catalyst portion is treated at a high temperature to desorb and treat the water adsorbed on the catalyst and the reaction intermediate material.

In particular, since ozone remaining in the gas during the ozone treatment can be removed through the catalyst, there is provided an advantage that the amount of ozone used in the ozone treatment need not be exactly matched with the amount of the odor component. According to the present invention, it is possible to generate an amount of ozone two to ten times larger than the amount of ozone necessary for reacting the odor component with ozone, so that there is no need to precisely control the amount of generated ozone according to the amount of the odor component.

Further, according to the present invention, the volatile organic compound or water, which is a reaction intermediate material adsorbed to the catalyst layer or the offensive odor concentration layer, can be desorbed from the catalyst layer or the offensive odor concentration layer and oxidized by high temperature treatment periodically at about 250 ° C / RTI > Thus, the efficiency of the catalytic component of the catalyst layer or the malodorous concentrate can be regenerated periodically, so that the performance of the entire apparatus can be maintained for a long time.

Hereinafter, specific examples of the present invention will be described with reference to comparative examples.

≪ Example 1 >

10 kg / day of waste food was put into the waste food treatment apparatus (ATIS) and the gas was sucked at 100 L / min using a blowing fan (heavy oil) to enter the ozone treatment unit of the malodor removing apparatus of the present invention. At this time, acetaldehyde among the malodor components was analyzed by thermal desorption-gas chromatograph-flame ionization detector (TDU-GC-FID, thermal desorption unit-gas chromatograph-flame ionization detector, 7100A (Entek) - Clarous 600 (Perkin Elmer) And measured at about 0.8 ppm.

UV-C RAM (Phillips) was installed in the ozone treatment section, and ozone was measured and adjusted with an analyzer IN-2000-L2-LC (INU) to generate about 1.6 ppm.

0.5 L of a silver impregnated Hopkalite catalyst (ATIS) was filled in the catalyst part to form a catalyst layer, and a heater 147 (ATIS) was installed upstream of the catalyst part. The temperature of the catalyst layer was heated to 250 DEG C for 2 minutes every 30 minutes.

≪ Example 2 >

Example 1 was carried out in the same manner as in Example 1, except that a metal honeycomb having betas zeolite (HSZ-900, Toso) coated thereon as a bad odor concentration layer was additionally provided between the heater and the catalyst layer in the catalyst part in Example 1.

≪ Comparative Example 1 &

Example 1 was carried out in the same manner as in Example 1, except that the heater was omitted from the catalyst portion.

<Experimental Example 1>

The acetaldehyde in the gas discharged from the food processor deodorization system was measured by TDU-GC-FID {7100A (Entec) - Clarous 600 (Perkin Elmer)} every 5 minutes and the concentration of ozone was measured every 5 minutes by analyzer IN-2000 (Acetaldehyde and ozone concentration of the gas discharged from the food processor deodorization system) as measured by -L2-LC (U.S.A.). For the reproducibility of the measurements, the system was run for 5 days and then measured at 6 days.

Elapsed time (minutes) Example 1 Example 2 Comparative Example 1 AA * (ppm) Ozone (ppm) AA * (ppm) Ozone (ppm) AA * (ppm) Ozone (ppm) One 0.01 0.000 0.00 0.000 0.32 0.023 6 0.01 0.000 0.00 0.000 0.26 0.020 11 0.01 0.000 0.00 0.000 0.28 0.021 16 0.01 0.000 0.00 0.000 0.26 0.025 21 0.01 0.000 0.00 0.000 0.35 0.031 26 0.01 0.000 0.00 0.000 0.21 0.028 31 0.00 0.000 0.00 0.000 0.27 0.027 36 0.00 0.000 0.00 0.000 0.25 0.026 41 0.01 0.000 0.00 0.000 0.29 0.023

AA: acetaldehyde

In the case of Examples 1 and 2, the catalyst layer was heated for 2 minutes at 250 ° C every 30 minutes by using a heater to oxidize the intermediate adsorbed on the catalyst layer, so that the acetaldehyde removal efficiency was high. In addition, the ozone removal rate was maintained because of the effect of desorbing moisture adsorbed and adsorbed on the catalyst layer and regenerating the catalyst layer.

In the case of Example 2, acetaldehyde was adsorbed in a bad odor concentration layer coated with hydrophobic zeolite, and then it was desorbed upon heating at 250 ^° C for 2 minutes every 30 minutes using a heater, and oxidized to carbon dioxide in the catalyst layer at the downstream, No aldehyde was detected.

In the case of Comparative Example 1, 0.21 to 0.35 ppm of acetaldehyde and 0.020 to 0.31 ppm of ozone were discharged to the rear end. In this case, it can be confirmed that acetaldehyde and ozone remain in the discharged gas without being treated.

As described above, the present invention provides an ozone-catalyzed odor removing apparatus. The ozone generated by the ultraviolet lamp during the ozone treatment may be 2 to 10 times the amount of ozone necessary for removing odor. The intermediate substance and the volatile organic compound including CH, C = O, COO- group generated by the reaction with ozone are treated or adsorbed by the catalyst, and the substance adsorbed on the catalyst is completely oxidized .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. Therefore, it should be pointed out that the scope of the present invention is not limited to the described embodiments, but should be construed according to the appended claims.

10: Odor removing device
11: Inflow pipe
12: ozone processing section
121: Case
123: ultraviolet lamp
13: Transfer pipe
14:
141: Case
143: catalyst layer
145: Odor concentrated layer
147: Heater
15: discharge pipe

Claims (5)

A malodor removing apparatus (10) for introducing malodorous gas and removing odor components using ozone and a catalyst, and then discharging the purified gas,
An ozone treatment unit 12 for discharging a malodorous gas containing an odor component and treating it with ozone as a mixed gas of residual ozone component, residual odor component, volatile organic compound which is an intermediate substance produced by reaction of ozone and odor component, ;
A catalyst layer 143 for catalytically reacting and discharging the residual ozone component, residual odor component, and volatile organic compound in the gas treated in the ozone treatment section 12, and a catalyst layer 143 for releasing the temperature inside the catalyst section 14 from room temperature to 150 A catalyst portion 14 having a heater 147 capable of raising the temperature to ~ 300 ° C
And an odor eliminating device using ozone and a catalyst. The ozone treatment apparatus according to claim 1, wherein the ozone treatment unit (12) comprises an ultraviolet lamp (123) that emits ultraviolet rays in a UV-C band having a wavelength of 100 to 280 nm, And the ozone is generated by the ozone and the catalyst. The apparatus according to claim 1, wherein the catalyst layer (143) comprises a catalyst impregnated with a hopcalite catalyst or a hopcalite with silver. The catalyst part 14 has the heater 147 disposed upstream of the catalyst layer 143 and the malodorous layer 145 between the catalyst layer 143 and the heater 147 And the malodorous concentration layer 145 selectively desorbs residual odor components and volatile organic compounds from the gas flowing into the catalyst section 14 at room temperature and desorbs when the temperature is 150 to 300 ° C. Odor removal device using ozone and catalyst. 5. The malodor removal apparatus according to claim 4, wherein the malodorous concentration layer 145 comprises at least one of hydrophobic zeolite, beta zeolite, USY zeolite, and ZSM-5 zeolite.

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