KR100816649B1 - A Removing System of Volatile Organic Compounds - Google Patents

Abstract

The present invention relates to a device for removing volatile organic compounds (VOC) discharged from an industrial site, etc., the discharge gas containing VOC supplied through the VOC supply line 31 to the VOC liquid catalyst solution (12) A VOC absorbing unit 10 that is injected into and removes VOCs; A VOC adsorption section 20 for adsorbing and removing VOCs not removed from the VOC absorption section 10 using a solid adsorbent; A connection line 32 connecting the VOC absorbing unit 10 and the VOC absorbing unit 20 to supply the exhaust gas from the VOC absorbing unit 10 to the VOC absorbing unit 20; A VOC mixture discharge pipe 33 connected to the VOC absorbing unit 10 to discharge the liquid VOC mixture; And a gas discharge pipe 34 through which the exhaust gas from which the VOC is removed from the VOC adsorption unit 20 is discharged into the atmosphere; According to the apparatus for removing volatile organic compounds according to the present invention, the VOC contained in the exhaust gas is primarily removed by using a liquid catalyst, and the remaining VOCs are adsorbed and removed by the solid adsorbent to improve VOC removal efficiency. There is an effect that can be used repeatedly without replacing the solid adsorbent.

Volatile organic compounds, VOC, liquid catalyst, ether, adsorption, canister, activated carbon, zeolite

Description

Volatile Organic Compounds

1 schematically shows an apparatus for removing volatile organic compounds according to the present invention.

Figure 2 shows the flow of VOC removal in the volatile organic compound removal device according to the present invention.

Figure 3 shows the recovery flow of VOC in the volatile organic compound removal device according to the present invention.

Figure 4 schematically shows another embodiment of the volatile organic compound removal device according to the present invention.

** Explanation of symbols for main parts of drawings **

10, 10 ': VOC absorber 11, 11': VOC absorber

12: VOC liquid catalyst solution 13: aeration part

15: Mixing unit 16: VOC liquid catalyst liquid supply pipe

17: injection nozzle 20: VOC adsorption unit

21, 22: suction canister 23, 23 ': directional valve

31, 31 ': VOC supply line 32, 32': connection line

33, 33 ': VOC mixture discharge pipe 34: gas discharge pipe

40: VOC recovery unit 41: VOC recovery line

42, 42 ': Directional valve 43: Pneumatic pump

44: decompression pump 45: gas tank

The present invention relates to a device for removing volatile organic compounds (Volatile Organic Compounds) discharged from an industrial site, and more particularly, absorbs and removes the VOC in the exhaust gas by using a VOC liquid catalyst liquid and the remaining VOC solid absorbent The present invention relates to a volatile organic compound removal device for releasing exhaust gas from which VOC is completely removed by adsorption to the atmosphere.

Volatile Organic Compounds (hereinafter, abbreviated as VOC) are high vapor pressures, which easily evaporate into the atmosphere, and react with sunlight when co-existing with nitrogen oxides in the atmosphere to cause photochemical reactions, resulting in ozone and peroxyacetyl nitrate (PAN). A generic term for materials that produce photochemical oxidants to cause photochemical smog. In addition, VOC is an air pollutant and carcinogenic toxic chemical, a precursor of photochemical oxides, a cause of global warming and odors. The VOC also occurs in paints painted on apartments, etc., and has been pointed out as a causative agent of sick house syndrome and atopy.

The sources of these VOCs are natural sources such as soil, wetlands, vegetation, and grasslands, and artificial sources such as organic solvent use facilities, coating facilities, laundry, storage stations, gas stations and various types of transportation. Most of them are mobile pollutants such as used facilities and automobiles. Since VOCs have a great impact on the environment and human health, most countries are making efforts to reduce their emissions and regulate human sources.

Korea defines VOCs as petrochemical products, organic solvents, or other substances through the Enforcement Decree of the Air Environment Conservation Act, and 31 substances and products such as benzene, acetylene, and gasoline are regulated by the Environmental Notice. VOCs range from industrial solvents to organic gases emitted from chemical and pharmaceutical plants or plastic drying processes, and are often found in low-boiling liquid fuels, paraffin, olefins and aromatics. The hydrocarbons used are almost the same.

The widely used method for removing VOC is incineration, which is used to prevent odors and destroy harmful compounds, and is also used to reduce VOCs released into the atmosphere and undergoing photochemical reactions. Incineration of VOC diluted in air includes direct heating oxidation method and catalytic oxidation method, and the removal efficiency is high, and there is an advantage of fully oxidizing organic materials if given sufficient time at high temperature. There is a disadvantage in that the cost is large and dangerous during operation due to high temperature operation.

In addition, another method for removing VOCs is an adsorption method, in which adsorption causes gaseous VOC molecules to come into contact with a solid adsorbent to bond and separate by weak intermolecular attraction. At this time, in order to extend the life of the adsorbent, the adsorbed VOC is recovered and the adsorbent is regenerated and used continuously. In addition, there is an absorption method in which a gaseous VOC is liquefied into a liquid VOC mixture to be removed.

In addition, after adsorbing the VOC to the adsorbent, the desorbed VOC is desorbed by using high temperature water vapor, and then a steam regeneration method or a semipermeable membrane is used to pass the desorbed VOC-containing air stream through a moving bed evaporator used as a heat source of the steam regeneration process. New technologies, such as membrane separation, which selectively separate VOCs from off-gases, continue to be developed.

However, the conventional VOC removal techniques have low VOC removal efficiency, difficult to completely remove the VOC depending on the type of compounds constituting the VOC, and the VOC that is not removed may explode by heat or adversely affect the human body. there was.

The present invention has been made to solve the above problems, a volatile organic compound that can be discharged to the atmosphere by performing the VOC adsorption using a solid adsorbent following the VOC removal using the VOC liquid catalyst liquid The purpose is to provide a removal device.

In addition, it is an object of the present invention to provide a volatile organic compound removal device that aeration of the exhaust gas containing the VOC in the VOC liquid catalyst liquid or by spraying the VOC liquid catalyst liquid to the exhaust gas containing VOC so that VOC is quickly absorbed.

In addition, the canister filled with a solid adsorbent adsorbing VOCs can be doubled to simultaneously perform adsorption and desorption of VOCs, as well as to recover the desorbed VOCs and to remove VOCs again using a VOC liquid catalyst. It is an object of the present invention to provide a device for removing volatile organic compounds that can minimize the discharge of gas to outside.

In order to achieve the above object, the volatile organic compound removing device according to the present invention includes a VOC absorbing unit for removing VOC from the exhaust gas containing VOC by the VOC liquid catalyst; A VOC adsorption unit having an adsorbent to adsorb and remove VOCs not removed from the VOC absorption unit; A connection line connecting the VOC absorbing unit and the VOC absorbing unit to supply the exhaust gas passing through the VOC absorbing unit to the VOC absorbing unit; And a gas discharge pipe for discharging the discharge gas from which the VOC is removed from the VOC adsorption unit.

The VOC absorption unit is filled with a predetermined amount of the VOC liquid catalyst liquid and one end of the VOC absorption tank connected to one end of the connection line; A VOC supply line connected to the other side of the VOC absorption tank so as to introduce a discharge gas including VOC into the VOC absorption tank; It is characterized in that it comprises an aeration unit provided at the end of the VOC supply line to allow the exhaust gas containing the VOC aeration in the VOC liquid catalyst liquid,

The VOC absorption unit is connected to one end of the connection line is connected to one side and the VOC absorption tank is connected to the VOC mixture discharge pipe on one side; A mixing part made of a pore material installed in the VOC absorption tank to allow the VOC liquid catalyst solution and the exhaust gas containing the VOC to contact each other; A supply pipe for supplying a VOC liquid catalyst liquid to an upper side of the mixing unit; A plurality of injection nozzles for spraying the VOC liquid catalyst liquid supplied to the supply pipe to the mixing unit; It is also possible to include a VOC supply line for supplying the exhaust gas containing the VOC to the lower side of the mixing unit.

The VOC liquid catalyst is characterized in that it comprises a polyoxyethylene noniphenyl ether, the VOC liquid catalyst is characterized in that consisting of 75 to 95% by weight of water and 5 to 25% by weight of polyoxyethylene noniphenyl ether. .

The adsorbent is characterized by mixing at least one of carbon-based adsorbents such as granular activated carbon, powdered activated carbon or fibrous activated carbon, zeolite and organic adsorbent.

In the above, the VOC adsorption unit is filled with the adsorbent adsorbing the VOC, the two canisters for absorbing the VOC in the exhaust gas, and the direction switching valve for connecting the connection line and the gas discharge pipe to any one of the two canisters It is configured to include; The connection line and the gas discharge pipe is branched and connected to each of the two canisters, and the direction change valve is installed at a branched portion of the connection line and the gas discharge pipe.

And in the above it is characterized in that it further comprises a VOC recovery unit for separating the VOC adsorbed in the VOC adsorption unit to recover back to the VOC supply line,

A VOC recovery unit having one side branched to be connected to the canister of the VOC adsorption unit and the other side connected to a VOC supply line; A pump which supplies gas to the canister of the VOC adsorption unit and desorbs the VOC adsorbed on the adsorbent to recover the VOC recovery line; The diverged portion of the VOC recovery line, and the diverging portion between the pump and the canister is characterized in that it comprises a directional valve so that only one canister is in communication with the VOC recovery line and the pump.

The gas supplied to the canister of the VOC adsorption unit by the pump may be nitrogen or air.

Hereinafter, a volatile organic compound removing apparatus according to the present invention will be described with reference to the accompanying drawings.

Figure 1 schematically shows a volatile organic compound removal device according to an embodiment of the present invention, Figure 2 shows the flow of VOC removal in the VOC removal device of the present invention, Figure 3 shows the recovery flow of VOC 4 schematically illustrates an apparatus for removing a volatile organic compound according to another embodiment of the present invention.

In the volatile organic compound removal device according to an embodiment of the present invention, as shown in FIGS. 1 to 3, the exhaust gas containing VOC supplied through the V0C supply line 31 is transferred into the VOC liquid catalyst liquid 12. A VOC absorbing unit 10 which is added to remove the VOCs; A VOC adsorption unit 20 for adsorbing and removing VOCs not removed from the VOC absorption unit 10 using an adsorbent; A connection line 32 connecting the VOC absorbing unit 10 and the VOC absorbing unit 20 to supply the exhaust gas from the VOC absorbing unit 10 to the VOC absorbing unit 20; And a gas discharge pipe 34 through which the exhaust gas from which the VOC is removed from the VOC adsorption unit 20 is discharged. In addition, the VOC adsorbed to the VOC adsorption unit 20 is separated from the VOC supply line 31. ) Includes a VOC recovery unit 40 to recover.

In FIG. 1, reference numeral 33 illustrates a VOC mixture discharge pipe connected to the VOC absorbing unit 10 to discharge the VOC mixture mixed in the VOC liquid catalyst solution 12.

The VOC liquid catalyst solution 12 may include polyoxyethylene nonyphenyl ethers, and the polyoxyethylene nonyphenyl ether and water may be mixed and used. In using the polyoxyethylene noniphenyl ether mixed with water, the content of polyoxyethylene noniphenyl and water may be used in an amount of about 50% by weight, respectively, but the bubbles may not easily escape due to the viscosity of the polyoxyethylene noniphenyl ether. There is concern

The VOC liquid catalyst is preferably used by mixing 75 to 95% by weight of water and 5 to 25% by weight of ether.

The VOC absorbing unit 10 includes a VOC absorbing tank 11 in which the VOC liquid catalyst solution 12 is filled to a certain degree, and the VOC mixture discharge pipe 33 is connected to a lower end thereof, and the VOC absorbing tank 11. And an aeration part 13 positioned inside the aeration part 13 to allow the VOC supplied through the VOC supply line 31 to be aerated inside the VOC liquid catalyst liquid 12. Therefore, the exhaust gas supplied through the VOC supply line 31 is aerated in the VOC liquid catalyst liquid 12 to change into bubbles, and as a result, the VOC contained in the exhaust gas is absorbed into the VOC liquid catalyst liquid 12. will be.

At this time, the internal pressure of the VOC absorbing tank 11 is in the atmospheric pressure state, the lower the temperature of the VOC liquid catalyst solution 12 is better, but can be used at room temperature. That is, it is not necessary to apply a separate pressure for the absorption of VOC, the lower the temperature of the VOC liquid catalyst solution 12 is advantageous to improve the VOC removal rate. The amount of the VOC liquid catalyst liquid 12 or the mixing ratio of water and polyoxyethylene noniphenyl is appropriately adjusted according to the type of VOC contained in the exhaust gas, the mixed component and the supply amount of the exhaust gas.

In addition, the VOC adsorption unit 20 is filled with a solid adsorbent adsorbing the VOC, the first canister 21 and the second canister 22 for adsorbing the VOC in the exhaust gas supplied from the bottom and the connection line ( 32 and lower portions of the first and second canisters 21 and 22 and between the gas discharge pipe 34 and the upper portions of the first and second canisters 21 and 22, respectively, so that only one canister is connected to the connection line. (32) and direction change valves (23, 23 ') for communicating with the gas discharge pipe (34).

In this case, the solid adsorbent is preferably used by mixing one or more of carbon-based adsorbents such as granular activated carbon, powdered activated carbon or fibrous activated carbon, zeolite and organic adsorbent. Thus, the VOC contained in the exhaust gas is removed by contacting the solid adsorbent and binding to the solid adsorbent by weak intermolecular attraction.

The VOC recovery unit 40 includes a VOC recovery line 41 connecting the lower ends of the canisters 21 and 22 of the VOC adsorption unit 20 and the VOC supply line 31, and the VOC adsorption unit 20. Pneumatic pump 43 for supplying a high pressure gas to the canister (21, 22) of the upper side) to desorb the VOC adsorbed on the solid adsorbent to recover the VOC recovery line 41, and the VOC recovery line 41 And a lower portion of the canisters 21 and 22 and between the pneumatic pump 43 and the upper portions of the canisters 21 and 22, respectively, so that only one canister is the VOC recovery line 41 and the pneumatic pump 43. The direction change valves 42 and 42 ', which are connected to each other, the decompression pump 44 which is installed at the VOC recovery line 41 and lowers the pressure of the recovered VOC mixture, and the types of VOCs contained in the exhaust gas. In accordance with the gas tank 45 for supplying an inert gas such as nitrogen.

The VOC recovery line 41 is one end is connected to the VOC supply line 31, the other end is branched and connected to the canister (21, 22), respectively, the direction switching valve 42 is the VOC recovery line 41 It is installed at the branched part of.

Meanwhile, the pneumatic pump 43 is also branched and installed in the pipe connected to the canisters 21 and 22, and the direction switching valve 42 'is also installed in the branched part of the pipe to which the pneumatic pump 43 is connected. .

The volatile organic compound removing device of the present invention configured as described above absorbs and removes VOC primarily from the VOC absorbing unit, and removes VOC not removed by adsorbing from the VOC absorbing unit and releases the remaining exhaust gas into the atmosphere.

Exhaust gas supplied through the VOC supply line 31 is acidified and aerated by the aeration part 13 in the VOC absorption tank 11 to be changed into bubbles in the VOC liquid catalyst liquid 12. Therefore, the VOC contained in the exhaust gas is absorbed by the VOC liquid catalyst liquid 12 and converted into a VOC mixture.

The VOC mixture is discharged to the outside through the VOC mixture discharge pipe 33 connected to the lower end of the VOC absorption tank 11.

Of course, the VOC contained in the exhaust gas in the VOC absorption tank 11 may not be completely removed, and thus the exhaust gas exiting the VOC liquid catalyst liquid 12 may be removed through the connection line 32. It is moved to 20. At this time, the exhaust gas is supplied only to the canister 21 or 22 of the first canister 21 and the second canister 22 by the directional valve 23, and flows into the canister 21 or 22. The VOC contained in the discharged gas is adsorbed to the solid adsorbent inside the canister 21 or 22 and is almost completely removed. Thereafter, the exhaust gas from which the VOC is removed is discharged through the gas discharge pipe 34.

Since the adsorption heat is generated when VOC is adsorbed in the canister 21 or 22, in order to solve a problem such as an explosion due to excessive accumulation of adsorption heat, when a certain amount of VOC is adsorbed, the inlet of the exhaust gas is blocked and the solid adsorbent is blocked. The adsorbed VOCs must be desorbed. Since the VOC adsorption must be continued even when the VOC desorption process is performed, the canisters 21 and 22 are dually configured, and the exhaust gas is supplied and discharged to only one side by using the direction switching valves 23 and 23 '. .

The VOC recovery unit 40 desorbs the VOC accumulated in the canisters 21 and 22 and then supplies the VOC back to the VOC supply line 31 to the VOC liquid catalyst liquid 12 in the VOC absorbing unit 10. To be absorbed. That is, if the VOC is sufficiently adsorbed on the first canister 21, the second canister 22 communicates with the connection line 32 and the gas discharge pipe 34 by the direction switching valves 23 and 23 ′, and the other direction. The first canister 21 communicates with the VOC recovery line 41 and the pneumatic pump 43 by the selector valves 42 and 42 '. Accordingly, VOC is adsorbed in the second canister 22 and VOC is desorbed in the first canister 21. Subsequently, when VOC is sufficiently adsorbed on the second canister 22, the first canister 21 performs the adsorption process of VOC by the direction switching valves 23, 23 ′ 42, 42 ′ and the second canister 22. ) Performs the desorption process of VOC.

When the high pressure air or gas is supplied to the first canister 21 according to the operation of the pneumatic pump 43, the solid VOC adsorbed on the solid adsorbent is desorbed, and the VOC supply line is passed through the VOC recovery line 41. Move to (31) side. At this time, if the pressure of the gas containing the desorbed VOC is too high can flow back to the VOC supply line 31, it is also possible to supply the pressure to the VOC supply line 31 after the pressure drop through the pressure reducing pump (44). . At this time, if the flammability of the VOC desorbed from the solid adsorbent has a high risk of explosion, the canister 21 of the VOC adsorption unit 20 through the gas inside the gas tank 45 in which gas such as nitrogen is stored through the pneumatic pump 43. , 22). Of course, when the flammability of the VOC is low, the general air may be supplied instead of a separate gas.

Through the above process, the VOC contained in the exhaust gas is completely removed and discharged through the gas discharge pipe 34, and the VOC is absorbed by the VOC liquid catalyst liquid and converted into a liquid VOC mixture, through the VOC mixture discharge pipe 33. Is released.

In the above, the method of removing VOC by aeration of the exhaust gas containing VOC in the VOC liquid catalyst solution was used, but as in another embodiment of the present invention, the VOC liquid catalyst solution was injected into the exhaust gas containing VOC to form VOC. You can also remove it.

On the other hand, another embodiment of the volatile organic compound removal device according to the present invention, as shown in Figure 4, VOC liquid consisting of water and ether in the discharge gas containing VOC supplied through the VOC supply line 31 ' A VOC absorbing part 10 ′ that sprays the catalyst liquid to remove VOCs; A VOC adsorption section 20 for adsorbing and removing VOCs not removed from the VOC absorption section 10 'by using a solid adsorbent; A connection line 32 'connecting the VOC absorbing unit 10' and the VOC absorbing unit 20 to supply the exhaust gas from the VOC absorbing unit 10 'to the VOC absorbing unit 20; A VOC mixture discharge pipe 33 'connected to the VOC absorbing portion 10' to discharge the liquid VOC mixture; And a gas discharge pipe 34 through which the discharge gas from which the VOC is removed from the VOC adsorption unit 20 is discharged.

Here, the VOC absorber 10 ', the VOC absorbing tank 11' is connected to one end of the connection line 32 'on the upper side and the VOC mixture discharge pipe 33' on the lower side, Mixing unit 15 made of a porous material and installed in the middle portion of the VOC absorption tank 11 'and allowing the exhaust gas containing the VOC liquid catalyst solution and the VOC to be mixed, and an upper side of the mixing unit 15. It is composed of a plurality of injection nozzles 17 to be sprayed to the mixing portion 15 side VOC liquid catalyst liquid supplied to the VOC liquid catalyst liquid supply pipe 16; The VOC supply line 31 ′ supplies a discharge gas including VOC to the lower side of the mixing unit 15.

In this case, the VOC adsorption unit 20 may further include a VOC recovery unit 40 to separate and recover the VOC adsorbed to the VOC supply line 31. However, since the VOC adsorption unit and the VOC recovery unit are the same as in the above-described embodiment of the present invention, a description thereof and a description of the operation will be omitted.

Another embodiment of the volatile organic compound removal device of the present invention configured as described above is to remove the VOC by spraying the VOC liquid catalyst liquid in the exhaust gas containing the VOC.

Exhaust gas supplied through the VOC supply line 31 ′ is supplied to the lower side of the mixing unit 15 in the VOC absorption tank 11 ′, and the VOC liquid catalyst from the spray nozzle 17 installed above the mixing unit 15. The VOC liquid catalyst liquid supplied through the liquid supply pipe 16 is injected. At this time, the VOC liquid catalyst liquid injected from the injection nozzle 17 is advantageous as the droplet is smaller, it is preferable to be sprayed in the form of a spray.

As a result, the VOC contained in the exhaust gas adheres to the droplet surface of the VOC liquid catalyst liquid, whereby the VOC mixture having a high specific gravity is accumulated in the lower portion of the VOC absorption tank 11 '. The exhaust gas containing the VOC liquid catalyst and the VOC are reacted in and around the mixing unit 15 made of a plurality of porous materials. In addition, the liquid VOC mixture accumulated in the lower portion of the VOC absorption tank 11 'is discharged to the outside through the VOC mixture discharge pipe 33', and the discharge gas containing VOC not absorbed by the VOC liquid catalyst is connected to the connection line. It is moved to the VOC adsorption part 20 through 32 '.

Since the operation of the VOC adsorption unit 20 and the VOC recovery unit 40 is the same as the above-described embodiment of the present invention, a description thereof will be omitted.

1 to 4, the connection lines 32 and 32 'and the gas discharge pipes 34 and 34' are branched and connected to the first and second canisters 21 and 22, respectively, and the directional valve 23 and 23 'are provided at the branched portions of the connection lines 32 and 32' and the gas discharge pipes 34 and 34 '.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those of ordinary skill in the art are appropriately within the scope described in the claims of the present invention. Changes will be possible.

As described above, the volatile organic compound removing device according to the present invention removes VOC contained in the exhaust gas primarily by using a VOC liquid catalyst and simultaneously removes the remaining VOC by solid adsorbent to remove VOC. It can improve efficiency and prevent the damage caused by VOC by aeration of the exhaust gas containing VOC in the liquid absorbent so that the reaction between the liquid absorbent and VOC is made and then discharged to the outside after forming the liquid VOC mixture. It removes VOC not removed from VOC absorbent by using solid adsorbent and desorbs VOC adsorbed on adsorbent and recovers it by reacting with VOC liquid catalyst through recovery part, so it can be used semi-permanently without replacing adsorbent. Dual configuration allows adsorption and desorption of VOCs without interrupting the process There is an effect that can be performed.

Claims (10)

A VOC absorbing unit (10 or 10 ') for removing VOC from the exhaust gas containing the VOC by the VOC liquid catalyst; A VOC adsorption unit 20 having an adsorbent to adsorb and remove VOCs not removed from the VOC absorption unit 10 or 10 '; The connection line 32 connecting the VOC absorbing unit 10 or 10 'and the VOC absorbing unit 20 to supply the exhaust gas passing through the VOC absorbing unit 10 or 10' to the VOC absorbing unit 20. Or 32 '); The VOC adsorption unit 20 comprises a gas discharge pipe 34 for discharging the exhaust gas from which the VOC is removed, wherein the VOC liquid catalyst liquid comprises polyoxyethylene noniphenyl ether Removal device. According to claim 1, wherein the VOC absorbing portion 10 is filled with a predetermined amount of the VOC liquid catalyst liquid 12 and the VOC absorbing tank 11 is connected to one end of the connection line 32 on one side; A VOC supply line (31) connected to the other side of the VOC absorber (11) to allow the exhaust gas containing the VOC to flow into the VOC absorber (11); The VOC supply line 31 is provided at the end of the volatile organic compound removal device, characterized in that it comprises an aeration unit (13) for aeration gas discharged in the VOC liquid catalyst solution (12). According to claim 1, The VOC absorbing portion 10 'is connected to one end of the VOC absorbing tank 11' is connected to one end of the connection line 32 'and the VOC mixture discharge pipe 33' on one side ; A mixing part 15 formed in the VOC absorbing tank 11 ′ and made of a porous material to allow the VOC liquid catalyst solution and the exhaust gas containing the VOC to contact each other; A supply pipe 16 for supplying a VOC liquid catalyst solution to the upper side of the mixing part 15; A plurality of spray nozzles 17 spraying the VOC liquid catalyst liquid supplied to the supply pipe 16 toward the mixing unit 15; Volatile organic compound removal device, characterized in that consisting of the VOC supply line (31 ') for supplying the exhaust gas containing the VOC to the lower side of the mixing section (15). delete The volatile organic compound removal apparatus according to claim 1, wherein the VOC liquid catalyst solution (12) comprises 75 to 95 wt% of water and 5 to 25 wt% of polyoxyethylene noniphenyl ether. The volatile organic compound removal device according to claim 1, wherein the adsorbent is formed by mixing at least one of carbon-based adsorbents such as granular activated carbon, powdered activated carbon or fibrous activated carbon, zeolite and organic adsorbent. According to any one of claims 1 to 3, 5, 6, wherein the VOC adsorption portion 20 is filled with two canister (Adsorber for adsorbing the VOC is absorbed so that the VOC in the exhaust gas ( 21 and 22, and the connecting line 32 or 32 'and the gas discharge pipe 34 or 34' to be in communication with any one canister (21 or 22) of the two canister (21, 22) Including valves 23 and 23 '; The connection line 32 or 32 'and the gas discharge pipe 34 or 34' are branched to each of the two canisters 21 and 22, and the direction switching valves 23 and 23 'are connected to the connection line 32. Or 32 ') and a branched portion of the gas discharge pipe 34 or 34'. The method according to any one of claims 1 to 3, 5 and 6, wherein the VOC adsorbed in the VOC adsorption unit 20 is separated and recovered to the VOC supply line 31 or 31 '. Volatile organic compound removal device further comprises a VOC recovery unit (40). The VOC recovery unit 40 of claim 8, wherein one side of the VOC recovery unit 40 is branched and connected to the canisters 21 and 22 of the VOC adsorption unit 20, and the other side is connected to the VOC supply line 31 or 31 '. Line 41; A pump 43 for supplying gas to the canisters 21 and 22 of the VOC adsorption unit 20 to desorb the VOC adsorbed on the adsorbent and recover the VOC to the VOC recovery line 41; The branched portion of the VOC recovery line 41 and the branched portion between the pump 43 and the canisters 21 and 22 are installed so that only one canister 21 or 22 is connected to the VOC recovery line 41. Volatile organic compound removal device, characterized in that it comprises a diverter valve (42, 42 ') to communicate with the pump (43). 10. The volatile organic compound removal device according to claim 9, wherein the gas supplied to the canisters (21, 22) of the VOC adsorption unit (20) by the pump (43) is nitrogen or air.

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