KR20230109470A - Air pollutant reduction apparatus - Google Patents

Abstract

An object of the present invention is to regenerate the adsorbent in-situ even after the destruction of the adsorbent without replacing or removing the adsorbent at the site of emitting volatile organic compounds (VOCs) and odorous substances, thereby enabling continuous use of air pollutants It is to provide a reduction device. Air pollutant reduction device according to an embodiment of the present invention, a first blower for supplying air containing at least one of volatile organic compounds (VOCs) and odorous substances, the air contained in the air passing through the first blower An adsorbent for adsorbing and concentrating the substance in a high concentration condition capable of being oxidized, a heat source for desorbing the substance from the adsorbent by supplying high-temperature heat to the adsorbent with a second blower, and oxidizing heat while oxidizing and removing the substance desorbed from the adsorbent. and a circulation line for further desorbing the material from the adsorbent by circulating and supplying the heat of oxidation to the adsorbent.

Description

Air pollutant reduction device {AIR POLLUTANT REDUCTION APPARATUS}

The present invention relates to an air pollutant reduction device, and more particularly, to an air pollutant reduction device that removes volatile organic compounds (VOCs) and odorous substances.

As is known, in the case of air pollutants such as volatile organic compounds (VOCs) and odorous substances, the temperature of most outlets is higher than room temperature.

Devices that reduce VOCs and odorous substances mainly use catalysts using temperatures higher than room temperature. These contaminants are reduced by oxidation treatment as they form the operating temperature conditions of the catalyst.

However, in order to continuously oxidize VOCs and odorous substances emitted at low concentrations, heat supply is required. That is, fuel is required to supply heat. In this case, the amount of fuel and heat to be used is excessive compared to the concentration that can be processed. In other words, an efficiency problem occurs in facility operation.

An object of the present invention is to regenerate the adsorbent in-situ even after the destruction of the adsorbent without replacing or removing the adsorbent at the site of emitting volatile organic compounds (VOCs) and odorous substances, thereby enabling continuous use of air pollutants It is to provide a reduction device.

Air pollutant reduction device according to an embodiment of the present invention, a first blower for supplying air containing at least one of volatile organic compounds (VOCs) and odorous substances, the air contained in the air passing through the first blower An adsorbent for adsorbing and concentrating the substance in a high concentration condition capable of being oxidized, a heat source for desorbing the substance from the adsorbent by supplying high-temperature heat to the adsorbent with a second blower, and oxidizing heat while oxidizing and removing the substance desorbed from the adsorbent. and a circulation line for further desorbing the material from the adsorbent by circulating and supplying the heat of oxidation to the adsorbent.

The circulation line may connect the front of the oxidation catalyst and the heat source.

The apparatus for reducing air pollutants according to an embodiment of the present invention may further include a circulation control valve provided in front of the oxidation catalyst and regulating the circulation of oxidation heat from the oxidation catalyst to the circulation line.

An apparatus for reducing air pollutants according to an embodiment of the present invention includes a blower pipe in which the first blower is installed, a main pipe connected to the blower pipe and in which the adsorbent and the oxidation catalyst are disposed, and the main pipe in front of the first blower. A discharge pipe branching from the pipe, a selection valve disposed at a branch point between the main pipe and the discharge pipe and selectively connecting air supplied to the first blower to the main pipe and the discharge pipe, and a selection valve in the main pipe in front of the selection valve. A heat supply pipe connecting the heat source, a control valve disposed at a branch point between the main pipe and the heat supply pipe and regulating heat supplied from the heat source to the main pipe by driving the second blower, and in front of the oxidation catalyst. It may further include a circulation control valve that is provided and regulates circulation from the oxidation catalyst to the circulation line connected to the heat source.

The adsorbent and the oxidation catalyst may be provided in plurality and repeatedly disposed in the main pipe.

An apparatus for reducing air pollutants according to an embodiment of the present invention includes a blower pipe in which the first blower is installed, a first branch pipe branched from the blower pipe and having a first adsorbent and a first oxidation catalyst disposed thereon, and branched off from the blower pipe. A second branch pipe in which a second adsorbent and a second oxidation catalyst are disposed, and disposed at branch points of the blower pipe, the first branch pipe, and the second branch pipe, and supply air supplied to the first blower to the first branch pipe and the second branch pipe. A selection valve selectively connected to the second branch pipe, a first heat supply pipe and a second heat supply pipe respectively connecting the heat source to the first branch pipe and the second branch pipe in front of the selection valve, A first check-off valve and a second check-off valve respectively arranged at the front to control the heat supplied from the heat source to the first branch pipe and the second branch pipe, respectively, by driving the second blower, and the first check valve It is provided in front of the first oxidation catalyst and the second oxidation catalyst of each of the engine and the second branch pipe to control the circulation from the first oxidation catalyst and the second oxidation catalyst to the circulation line connected to the heat source. It may further include a first circulation isolation valve and a second circulation isolation valve.

The first adsorbent, the second adsorbent, the first oxidation catalyst, and the second oxidation catalyst are each provided in plurality, and the first adsorbent and the first oxidation catalyst are repeatedly disposed in the first branch pipe, In the second branch pipe, the second adsorbent and the second oxidation catalyst are repeatedly can be placed.

The adsorbent and the oxidation catalyst may be formed by coating a carrier.

The heat source may be one of a burner, an electric heater, and plasma.

The heat source may be one of arc plasma, radio frequency (RF) plasma, and microwave plasma.

The adsorbent may include a zeolite-based material.

An apparatus for reducing air pollutants according to an embodiment of the present invention includes a blower pipe in which the first blower is installed, a first branch pipe branched from the blower pipe and having a first adsorbent disposed thereon, and a second adsorbent branched from the blower pipe and disposed thereon. A second branch pipe, which is disposed at the branching point of the blower pipe, the first branch pipe, and the second branch pipe, and selectively connects the air supplied to the first blower to the first branch pipe and the second branch pipe A selection valve, a first heat supply pipe and a second heat supply pipe connecting the heat source to the first branch pipe and the second branch pipe in front of the selection valve, respectively, are disposed in front of the heat source to generate power for the second blower. A first check valve and a second check valve for regulating the heat supplied from the heat source to the first branch pipe and the second branch pipe, respectively, by driving, and the first check valve and the second branch pipe, respectively. A first circulation control valve and a second circulation control valve provided in front of the first adsorbent and the second adsorbent to control the circulation from the first adsorbent and the second adsorbent to the circulation line connected to the oxidation catalyst and the heat source. It may further include a valve.

The oxidation catalyst may be disposed in the circulation line.

In this way, one embodiment supplies heat, desorbs VOCs and odorous substances adsorbed and concentrated on the adsorbent with desorption heat, oxidizes and removes VOCs and odorous substances including the desorption heat in an oxidation catalyst, and removes the oxidation heat generated by oxidation. By circulating and supplying the adsorbent through the circulation line, it is possible to further desorb VOCs and odorous substances from the adsorbent.

In one embodiment, since oxidation heat generated by oxidation is recovered from an oxidation catalyst and continuously circulated and supplied until complete regeneration of the adsorbent, VOCs and odorous substances adsorbed on the adsorbent can be oxidized.

1 is a block diagram of an air pollutant reduction device according to a first embodiment of the present invention.
2 is a block diagram of an air pollutant reduction device according to a second embodiment of the present invention.
3 is a block diagram of an air pollutant reduction device according to a third embodiment of the present invention.
4 is a block diagram of an air pollutant reduction device according to a fourth embodiment of the present invention.
5 is a block diagram of an air pollutant reduction device according to a fifth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

1 is a block diagram of an air pollutant reduction device according to a first embodiment of the present invention. Referring to FIG. 1, the air pollutant reduction device 100 according to the first embodiment includes a first blower F1, a second blower F2, an adsorbent 10, a heat source 20, an oxidation catalyst 30, and a circulation line 70.

The first blower F1 supplies air containing at least one of volatile organic compounds (VOCs) and odorous substances (for convenience, hereinafter referred to as "volatile organic compounds") in the atmosphere.

Most of the volatile organic compounds (VOCs) can be removed through oxidation. However, if the heat generated in the oxidation process of volatile organic compounds (VOCs) is not enough to sustain the oxidation reaction, the reaction cannot continue.

In this case, heat necessary for oxidation must be supplied using an external fuel or heat source 20 . That is, in order to continuously oxidize volatile organic compounds (VOCs) without using an external fuel or heat source, sufficient heat of oxidation must be generated by concentrating the VOCs under high concentration conditions.

Embodiments of the present invention are configured to generate sufficient heat of oxidation to continuously oxidize volatile organic compounds (VOCs) by concentrating VOCs under high-concentration conditions.

As an example, the adsorbent 10 adsorbs volatile organic compounds (VOCs) contained in the air passing through the first blower F1 and concentrates them to a high concentration condition capable of being oxidized. To this end, the second blower (F2) supplies high-temperature heat to the adsorbent (10).

That is, the adsorbent 10 is configured to adsorb VOCs at room temperature and concentrate them at a high concentration. For example, the adsorbent 10 may include a zeolite-based material. The zeolite-based material eliminates the risk of fire in the adsorbent (10).

The adsorbent 10 adsorbs VOCs at room temperature for a certain period of time or according to the adsorption capacity, and then, when a high-temperature condition capable of desorbing VOCs is created, concentrated VOCs can be desorbed and discharged.

In this case, the desorption heat for desorbing concentrated VOCs under high concentration conditions allows the desorbed VOCs to be oxidized and removed in the oxidation catalyst 30 . Using these characteristics, the adsorbent 10 and the oxidation catalyst 30 adsorb and concentrate VOCs under low-temperature conditions, and then desorb the VOCs with desorption heat so that they can be oxidized.

The heat source 20 supplies high-temperature heat to the adsorbent 10 so that concentrated high-temperature VOCs can be desorbed from the adsorbent 10 as desorption heat. The heat source 20 includes various forms.

For example, the heat source 20 may supply heat in the form of a burner when fuel can be supplied, and in an environment where fuel supply is difficult or fuel must not be used, in the form of an electric heater or plasma through power supply. heat can be supplied.

When plasma is used as the heat source 20, the heat source 20 may supply heat with arc plasma, radio frequency (RF) plasma, or microwave plasma that generates high-temperature conditions.

The oxidation catalyst 30 oxidizes and removes combustible VOCs under high concentration conditions desorbed from the adsorbent 10 by desorption heat, and is disposed in front of the adsorbent 10 for this purpose. That is, the adsorbent 10 is disposed on the side of the heat source 20 to receive desorption heat, and the oxidation catalyst 30 is disposed on the outlet side to oxidize combustible VOCs with the desorption heat. The oxidation catalyst 30 generates oxidation heat while oxidizing and removing VOCs.

The circulation line 70 circulates and supplies heat of oxidation generated in the oxidation catalyst 30 to the adsorbent 10 so that VOCs can be further desorbed from the adsorbent 10. As an example, the circulation line 70 connects the front of the oxidation catalyst 30 and the heat source 20. That is, the oxidation heat may be further heated according to the method of the heat source 20 while passing through the heat source 20 and supplied to the adsorbent 10 .

The air pollutant reduction device 100 of the first embodiment includes a blowing pipe 240, a main pipe 40, and a discharge pipe 50. The first blower F1 is installed in the blower pipe 240 to supply air containing VOCs. The adsorbent 10 and the oxidation catalyst 30 are disposed in the main pipe 40. The main pipe 40 is connected to the blowing pipe 240 .

The discharge pipe 50 is diverged from the main pipe 40 in front of the first blower F1. That is, air containing VOCs supplied to the first blower F1 may be discharged after the VOCs are removed while passing through the main pipe 40, or may be directly discharged through the discharge pipe 50.

The air pollutant reduction device 100 of the first embodiment further includes a selection valve SV. The selection valve SV is disposed at a branch point between the main pipe 40 and the discharge pipe 50 and is connected to selectively supply air supplied to the first blower F1 to the main pipe 40 or the discharge pipe 50.

That is, when the selection valve (SV) connects the first blower (F1) to the main pipe (40), the VOCs contained in the supplied air are adsorbed and concentrated by the adsorbent (10), then desorbed by the desorption heat, and the oxidation catalyst It is oxidized and removed by the heat of desorption in (30). In addition, when the selection valve (SV) connects the first blower (F1) to the discharge pipe (50), VOCs contained in the supplied air are discharged through the discharge pipe (50) without being oxidized and removed.

That is, when the adsorbent 10 adsorbs at room temperature for a certain period of time or according to the adsorption capacity, and then becomes a desorbable high-temperature condition, concentrated VOCs are desorbed from the adsorbent 10 and discharged. Again, in order to adsorb and concentrate VOCs with the adsorbent 10, while the VOCs are desorbed and discharged from the adsorbent 10, the air temporarily supplied to the first blower F1 passes through the discharge pipe 50 without removing the VOCs. may be discharged.

In addition, the air pollutant reduction device 100 of the first embodiment further includes a heat supply pipe 60, a second blower F2, and a shut-off valve V. The heat supply pipe 60 connects the heat source 20 to the main pipe 40 in front of the selection valve SV. Therefore, the air heated by the operation of the heat source 20 and the second blower F2 and containing the heat of separation can be supplied to the main pipe 40 and the adsorbent 10 . The shut-off valve (V) is disposed at the branch point between the main pipe 40 and the heat supply pipe 60 and regulates the supply of desorption heat supplied from the heat source 20 to the main pipe 40 due to the driving of the second blower F2. do.

The air pollutant reduction device 100 of the first embodiment further includes a circulation control valve (CV). The circulation control valve (CV) is provided in front of the oxidation catalyst 30 to control the circulation of air containing desorption heat and oxidation heat from the oxidation catalyst 30 to the circulation line 70. When the circulation isolation valve (CV) is turned on, the separation heat is discharged through the outlet of the main pipe (40), and when the circulation isolation valve (CV) is turned off, the separation heat is supplied to the circulation line (70).

The operation process of the air pollutant reduction device 100 of the first embodiment consists of first to fifth steps. In the first step, the first blower (F1) is operated and the selector valve (SV) is turned on to supply ambient air connected to the blower pipe (240) to the main pipe (40) to remove pollutants, that is, VOCs. It is adsorbed and concentrated to a high concentration in the adsorbent 10. At this time, the on (on) control valve (CV) maintains the main pipe 40 in an open state, and discharges the air from which VOCs are removed through the outlet of the main pipe (40).

The second step controls the selection valve (SV) to be turned off when the adsorption material 10 has reached a predetermined level of concentration and the adsorption and concentration of pollutants, that is, VOCs, is no longer achieved. This allows air to no longer flow into the adsorbent 10 and be discharged through the discharge pipe 50.

The third step is to control the circulation isolation valve (CV) off to connect the main pipe 40 and the circulation line 70, and to control the isolation valve (V) to turn on the heat source 20 and control 2 Operate the blower (F2). The high-temperature air further heated from the heat source 20 through the circulation line 70 is supplied to the adsorbent 10 in the main pipe 40 through the heat supply pipe 60, contaminants concentrated in the adsorbent 10, that is, desorbs VOCs.

In the fourth step, VOCs concentrated by air containing desorption heat are desorbed from the adsorbent 10 and discharged to the oxidation catalyst 30. At this time, VOCs that are concentrated and then desorbed include the heat of desorption under high-temperature conditions. At this time, VOCs discharged from the adsorbent 10 are circulated through the circulation line 70, and when the oxidation catalyst 30 reaches the oxidation temperature, the oxidation catalyst 30 generates oxidation heat while being oxidized and removed.

Oxidation heat generated while being oxidized in the oxidation catalyst 30 circulates through the circulation line 70 and is supplied to the adsorbent 10 to induce additional desorption of VOCs from the adsorbent 10. When a set temperature condition capable of inducing additional desorption is reached, the use of energy from the heat source 20 can be minimized by stopping the driving of the heat source 20 or reducing the amount of heat supplied from the heat source 20 .

In the fifth step, when VOCs are desorbed from the adsorbent 10, the heat source 20, the second blower F2, and the shut-off valve V are turned off, and the circulation check valve CV is turned on. Control to open the main pipe (40).

Then, by repeating the control in the first step, the first blower (F1) is operated and the selection valve (SV) is turned on to supply the air containing VOCs to the adsorbent (10) and adsorb it again to perform the enrichment process. make it repeat At this time, since the circulation control valve (CV) maintains the main pipe 40 in an open state, the air from which VOCs have been removed can be discharged through the outlet of the main pipe 40.

The air pollutant reduction device 100 of the first embodiment concentrates VOCs discharged at a low concentration in the adsorbent 10, desorbs the VOCs from the adsorbent 10 under high concentration conditions, and then converts the desorbed VOCs into an oxidation catalyst 30 Utilizing the heat of oxidation generated while oxidizing and removing the adsorbent 10, it is possible to continuously desorb and oxidize and remove the desorbed VOCs until complete regeneration of the adsorbent 10.

The air pollutant reduction device 100 of the first embodiment circulates the heat of oxidation of VOCs in the oxidation catalyst 30 to the circulation line 70 and additionally supplies it to the adsorbent 10 to further desorb VOCs from the adsorbent 10. can induce

Hereinafter, various embodiments of the present invention will be described. Compared to the first embodiment and the previously described embodiments, descriptions of the same components will be omitted, and different configurations will be described.

2 is a block diagram of an air pollutant reduction device according to a second embodiment of the present invention. The air pollutant reduction device 200 according to the second embodiment includes a blower pipe 240, a first branch pipe 241, and a second branch pipe 242. The first blower (F1) is installed in the blower pipe 240 to supply air containing VOCs to the first branch pipe 241 or the second branch pipe 242.

The first adsorbent 11 and the first oxidation catalyst 31 are disposed in the first branch pipe 241 branched from the blower pipe 240, and the second adsorbent 12 and the second adsorbent 12 are disposed in the second branch pipe 242. An oxidation catalyst 32 is disposed.

The selection valve (SV) is disposed at the branch point of the blower pipe 240, the first branch pipe 241, and the second branch pipe 242, and the air containing VOCs supplied to the first blower F1 is supplied to the first branch pipe 241. ) or optionally connected to the second branch pipe 242.

Due to the first branch pipe 241 and the second branch pipe 242, the first and second heat supply pipes 61 and 62 are provided. The first heat supply pipe 61 connects the heat source 20 to the first branch pipe 241 at the front of the selection valve SV, and the second heat supply pipe 62 connects the second heat supply pipe 62 at the front of the selection valve SV. The heat source 20 is connected to the branch pipe 242.

The second blower F2 is connected to the first heat supply pipe 61 and the second heat supply pipe 62 via the heat source 20, and transfers heat from the heat source 20 to the first heat supply pipe 61 or the second heat supply pipe 61. It is supplied to the heat supply pipe (62). Due to the first heat supply pipe 61 and the second heat supply pipe 62, first and second shut-off valves V1 and V2 are provided.

The first shut-off valve (V1) regulates the supply of heat from the second blower (F2) and the heat source 20 to the first branch pipe (241), and the second shut-off valve (V2) regulates the supply of heat to the second blower (F2) and the heat source. In (20), the supply of heat to the second branch pipe (242) is controlled.

The heat supplied to the first heat supply pipe 61 or the second heat supply pipe 62 is supplied to the first branch pipe 241 or the second branch pipe 242 by the first adsorbent 11 or the second adsorbent 12 ) to desorb the adsorbed and concentrated VOCs.

The first and second oxidation catalysts 31 and 32 are disposed at the outlets of the first and second branch pipes 241 and 242, respectively, and oxidize combustible VOCs with desorption heat. The first and second oxidation catalysts 31 and 32 generate oxidation heat while oxidizing and removing VOCs.

The circulation line 270 circulates and supplies the heat of oxidation generated in the first and second oxidation catalysts 31 and 32 to the first and second adsorbents 11 and 12, thereby generating the first and second adsorbents 11 and 12. allows additional desorption of VOCs from As an example, the circulation line 270 connects the front of the first and second oxidation catalysts 31 and 32 and the heat source 20 to each other.

The air pollutant reduction device 200 of the second embodiment further includes a first circulation check valve (CV1) and a second circulation check valve (CV2). The first circulation isolation valve (CV1) and the second circulation isolation valve (CV2) are located in front of the first and second oxidation catalysts (31, 32) of the first branch pipe (241) and the second branch pipe (242), respectively. A circulation line 270 connected from the first and second oxidation catalysts 31 and 32 to the heat source 20 regulates the circulation of air containing desorption heat and oxidation heat.

The air pollutant reduction device 200 of the second embodiment includes a line connecting the first branch pipe 241, the first heat supply pipe 61, and the circulation line 270, and the second branch pipe 242 and the second It consists of two lines connecting the heat supply pipe 62 and the circulation line 270. Therefore, in one line, the process of adsorption and concentration of VOCs in the first to fifth steps described in the first embodiment may be performed, and in the other line, the process of desorbing and oxidizing the adsorbed VOCs may be performed.

Therefore, the air pollutant reduction device 200 according to the second embodiment can continuously implement adsorption and concentration processes and desorption and oxidation processes. That is, the period of discharging VOCs to the discharge pipe 50 without oxidation treatment as in the first embodiment is eliminated in the second embodiment.

That is, the first blower (F1) is operated, the selection valve (SV) selects the first branch pipe (241), and supplies air containing VOCs through the first branch pipe (241) to supply the first adsorbent ( 11) to adsorb and concentrate VOCs.

At this time, the first shut-off valve V1 is controlled to be turned off. And, the on-controlled first circulation control valve CV1 maintains the first branch pipe 241 in an open state, and discharges air from which VOCs have been removed to the outlet of the first branch pipe 241 .

On the other hand, by controlling the second circulation check valve (CV2) to be turned off, the second branch pipe 242 and the circulation line 270 are connected, and the second check valve (V2) is turned on. Therefore, the second blower (F2) is operated and the air heated by the heat source 20 through the circulation line 270 passes through the second heat supply pipe 62 to the second adsorbent 12 in the second branch pipe 242 and In the second oxidation catalyst 32, VOCs are desorbed and oxidized.

At this time, VOCs discharged from the second adsorbent 12 are circulated through the circulation line 270, and when the second oxidation catalyst 32 reaches the oxidation temperature, the second oxidation catalyst 32 oxidizes and removes the oxidative heat. causes

Oxidation heat generated while being oxidized in the second oxidation catalyst 32 circulates through the circulation line 270 and is additionally supplied to the second adsorbent 12 to induce additional desorption of VOCs from the second adsorbent 12 .

When the adsorption concentration of the first adsorbent 11 is completed, the selection valve SV selects the second branch pipe 242 and supplies air containing VOCs through the second branch pipe 242 to the second adsorbent ( 12) to adsorb and concentrate VOCs.

At this time, the second shut-off valve V2 is off-controlled. And, the on-controlled second circulation check valve (CV2) maintains the second branch pipe 242 in an open state, and discharges air from which VOCs are removed through the outlet of the second branch pipe 242.

On the other hand, by controlling the first circulation check valve CV1 to be off, the first branch pipe 241 and the circulation line 270 are connected, and the first check valve V1 is turned on. Therefore, the second blower (F2) is operated and the air heated by the heat source 20 through the circulation line 270 passes through the first heat supply pipe 61 to the first adsorbent 11 in the first branch pipe 241 and In the first oxidation catalyst 31, VOCs are desorbed and oxidized.

At this time, VOCs discharged from the first adsorbent 11 are circulated through the circulation line 270, and when the first oxidation catalyst 31 reaches the oxidation temperature, the first oxidation catalyst 31 oxidizes and removes the oxidative heat. causes

Oxidation heat generated while being oxidized in the first oxidation catalyst 31 circulates through the circulation line 270 and is additionally supplied to the first adsorbent 11 to induce additional desorption of VOCs from the first adsorbent 11 .

As such, adsorption and concentration in the first branch pipe 241 and desorption and oxidation processes in the second branch pipe 242 proceed, or conversely, desorption and oxidation in the first branch pipe 241 and second branch pipe 241 proceed. Adsorption and concentration processes in organ 242 may proceed. In addition, processes in the first and second branch pipes 241 and 242 may be alternately performed.

Therefore, in the second embodiment, the process of adsorption and concentration of VOCs and the process of desorption and oxidation can be continuously performed. In addition, the second embodiment enables continuous use by regenerating the adsorbent in-situ even after the adsorbent is destroyed without replacing or removing the adsorbent at the site where VOCs are discharged.

In the second embodiment, the temperature of the first and second oxidation catalysts 31 and 32 is maintained at 450° C. or higher during regeneration in a cycle separate from the adsorption and regeneration cycles of the first and second adsorbents 11 and 12. can create At this time, the second embodiment includes regeneration of the first and second oxidation catalysts 31 and 32 against sulfur poisoning that may occur in the first and second oxidation catalysts 31 and 32 .

3 is a block diagram of an air pollutant reduction device according to a third embodiment of the present invention. Referring to FIG. 3 , the apparatus 300 for reducing air pollutants according to the third embodiment includes a plurality of adsorbents 10 and oxidization catalysts 30, respectively, and is configured by repeatedly disposing them in a main pipe 40.

The circulation line 70 connects the heat source 20 with the front of the oxidation catalyst 30, which is close to the outlet of the main pipe 40, among the plurality of oxidation catalysts 30. Oxidation heat generated in the oxidation catalysts 30 is circulated and supplied to the adsorbents 10 so that VOCs can be further desorbed from the adsorbents 10 .

The plurality of adsorbents 10 and the plurality of oxidation catalysts 30 enable the process of concentrating and oxidizing VOCs by supplying as little heat energy as possible in the initial stage of desorption after concentration. To this end, a plurality of adsorbents 10 and a plurality of oxidation catalysts 30 may be sequentially arranged to facilitate concentration and oxidation. Also, the plurality of adsorbents 10 and the plurality of oxidation catalysts 30 may be formed by coating a carrier.

When only enough heat is supplied to desorb concentrated VOCs from the adsorbent 10 closest to the heat source 20, the desorbed VOCs flow into the oxidation catalyst 30 and are oxidized, generating oxidation heat. Oxidation heat then heats the adsorbent 10 to desorb VOCs, and as the desorbed VOCs are introduced into the oxidation catalyst 30 and oxidized, desorption and oxidation may proceed sequentially. The air pollutant reduction device 300 according to the third embodiment circulates the oxidation heat of the desorbed VOCs through the circulation line 70, so energy required for operation can be further minimized.

4 is a block diagram of an air pollutant reduction device according to a fourth embodiment of the present invention. Referring to FIG. 4 , the air pollutant reduction device 400 of the fourth embodiment may be formed by applying the air pollutant reduction device 300 of the third embodiment to the air pollutant reduction device 200 of the second embodiment. there is.

The first adsorbent 11 and the second adsorbent 12 are provided in plurality, respectively, and the first oxidation catalyst 31 and the second oxidation catalyst 32 are respectively provided in plurality. In the first branch pipe 241, the first adsorbent 11 and the first oxidation catalyst 31 are repeatedly disposed, and in the second branch pipe 242, the second adsorbent 12 and the second oxidation catalyst 32 are repeatedly placed.

5 is a block diagram of an air pollutant reduction device according to a fifth embodiment of the present invention. Referring to FIG. 5 , the apparatus 500 for reducing air pollutants according to the fifth embodiment removes the first and second oxidation catalysts 31 and 32 of the apparatus 200 for reducing air pollutants according to the second embodiment, and It is formed by applying it as an oxidation catalyst (30).

In the air pollutant reduction device 500 of the fifth embodiment, the first adsorbent 11 is disposed in the first branch pipe 241, and the second adsorbent 12 is disposed in the second branch pipe 242. The heat supplied to the first heat supply pipe 61 or the second heat supply pipe 62 is supplied to the first branch pipe 241 or the second branch pipe 242 by the first adsorbent 11 or the second adsorbent 12 ) to desorb the adsorbed and concentrated VOCs. The oxidation catalyst 30 is disposed in the circulation line 170 and oxidizes combustible VOCs with desorption heat. The oxidation catalyst 30 generates oxidation heat while oxidizing and removing VOCs.

The circulation line 270 circulates and supplies the heat of oxidation generated in the oxidation catalyst 30 to the first and second adsorbents 11 and 12 to further desorb VOCs from the first and second adsorbents 11 and 12. make it possible The oxidation catalyst 30 may be commonly used in the first and second adsorbents 11 and 12 . As an example, the circulation line 270 connects the front of the first and second adsorbents 11 and 12 and the heat source 20 to each other.

In the air pollutant reduction device 500 of the fifth embodiment, the first circulation check valve (CV1) and the second circulation check valve (CV2) are the first branch pipe 241 and the second branch pipe 242, respectively. , It is provided in front of the second adsorbents 11 and 12, and regulates circulation of desorption heat and air to the oxidation catalyst 30 and the heat source 20 through the circulation line 270.

The air pollutant reduction device 500 of the fifth embodiment includes a line connecting the first branch pipe 241, the first heat supply pipe 61, and the circulation line 270, and the second branch pipe 242 and the second branch pipe 242. It consists of two lines connecting the heat supply pipe 62 and the circulation line 270. Therefore, adsorption and concentration of VOCs can be performed in one line, and desorption and oxidation of adsorbed VOCs can be performed in the other line.

Therefore, the apparatus 500 for reducing air pollutants according to the fifth embodiment can continuously implement adsorption and concentration processes and desorption and oxidation processes.

That is, the first blower (F1) is operated, the selection valve (SV) selects the first branch pipe (241), and supplies air containing VOCs through the first branch pipe (241) to supply the first adsorbent ( 11) to adsorb and concentrate VOCs.

At this time, the first shut-off valve V1 is controlled to be turned off. And, the on-controlled first circulation control valve CV1 maintains the first branch pipe 241 in an open state, and discharges air from which VOCs have been removed to the outlet of the first branch pipe 241 .

On the other hand, by controlling the second circulation check valve (CV2) to be turned off, the second branch pipe 242 and the circulation line 270 are connected, and the second check valve (V2) is turned on. Therefore, the second blower (F2) is operated and the air heated by the heat source 20 through the circulation line 270 passes through the second heat supply pipe 62 to the second adsorbent 12 in the second branch pipe 242 and The oxidation catalyst 30 desorbs and oxidizes VOCs.

At this time, VOCs discharged from the second adsorbent 12 circulate through the circulation line 270, and when the oxidation catalyst 30 reaches the oxidation temperature, the oxidation catalyst 30 oxidizes and removes it, generating oxidation heat.

Oxidation heat generated while being oxidized in the oxidation catalyst 30 circulates through the circulation line 270 and is additionally supplied to the second adsorbent 12 to induce additional desorption of VOCs from the second adsorbent 12 .

When the adsorption concentration of the first adsorbent 11 is completed, the selection valve SV selects the second branch pipe 242 and supplies air containing VOCs through the second branch pipe 242 to the second adsorbent ( 12) to adsorb and concentrate VOCs.

At this time, the second shut-off valve V2 is off-controlled. And, the on-controlled second circulation check valve (CV2) maintains the second branch pipe 242 in an open state, and discharges air from which VOCs are removed through the outlet of the second branch pipe 242.

On the other hand, by controlling the first circulation check valve CV1 to be off, the first branch pipe 241 and the circulation line 270 are connected, and the first check valve V1 is turned on. Therefore, the second blower (F2) is operated and the air heated by the heat source 20 through the circulation line 270 passes through the first heat supply pipe 61 to the first adsorbent 11 in the first branch pipe 241 and The oxidation catalyst 30 desorbs and oxidizes VOCs.

At this time, VOCs discharged from the first adsorbent 11 circulate through the circulation line 270, and when the oxidation catalyst 30 reaches the oxidation temperature, the oxidation catalyst 30 oxidizes and removes it, generating oxidation heat.

Oxidation heat generated while being oxidized in the oxidation catalyst 30 circulates through the circulation line 270 and is additionally supplied to the first adsorbent 11 to induce additional desorption of VOCs from the first adsorbent 11 .

As such, adsorption and concentration in the first branch pipe 241 and desorption and oxidation processes in the second branch pipe 242 proceed, or conversely, desorption and oxidation in the first branch pipe 241 and second branch pipe 241 proceed. Adsorption and concentration processes in organ 242 may proceed. In addition, processes in the first and second branch pipes 241 and 242 may be alternately performed.

Therefore, in the fifth embodiment, the process of adsorption and concentration of VOCs and the process of desorption and oxidation can be continuously performed. In addition, the fifth embodiment enables continuous use by regenerating the adsorbent in-situ even after the adsorbent is destroyed without replacing or removing the adsorbent at the site where VOCs are discharged.

In the second embodiment, a period in which the temperature of the oxidation catalyst 30 is maintained at 450° C. or higher during regeneration may be generated in a cycle separate from the adsorption and regeneration cycles of the first and second adsorbents 11 and 12 . At this time, the fifth embodiment includes regeneration of the oxidation catalyst 30 against sulfur poisoning that may occur in the oxidation catalyst 30.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these, and it is possible to make various modifications and practice within the scope of the claims, the description of the invention and the accompanying drawings, and this is also the present invention. It goes without saying that it falls within the scope of the invention.

10: adsorbent 11: first adsorbent
12: second adsorbent 20: heat source
30: oxidation catalyst 31: first oxidation catalyst
32: second oxidation catalyst 70: circulation line
40: main pipe 50: discharge pipe
100, 200, 300, 400, 500: air pollutant reduction device
240: blower pipe 241: first branch pipe
242: second branch pipe CV: circulation shutoff valve
CV1: 1st circulation isolation valve CV2: 2nd circulation isolation valve
F1: first blower F2: second blower
SV: Selection valve V: Isolation valve
V1, V2: 1st, 2nd shut-off valve

Claims (13)

a first blower supplying air containing at least one of volatile organic compounds (VOCs) and odorous substances;
an adsorbent for adsorbing the substance contained in the air passing through the first blower and concentrating the material to a high concentration condition capable of being oxidized;
a heat source for desorbing the material from the adsorbent by supplying high-temperature heat to the adsorbent using a second blower;
an oxidation catalyst generating oxidation heat while oxidizing and removing the material desorbed from the adsorbent; and
A circulation line for further desorbing the material from the adsorbent by circulating and supplying the heat of oxidation to the adsorbent.
Air pollutant reduction device comprising a. According to claim 1,
The circulation line is
Air pollutant reduction device for connecting the front of the oxidation catalyst and the heat source. According to claim 1,
Air pollutant reduction device further comprising a circulation control valve provided in front of the oxidation catalyst to control the circulation of oxidation heat from the oxidation catalyst to the circulation line. According to claim 1,
A blow pipe in which the first blower is installed;
A main pipe connected to the blower pipe and in which the adsorbent and the oxidation catalyst are disposed;
A discharge pipe branching from the main pipe in front of the first blower,
A selection valve disposed at a branch point between the main pipe and the discharge pipe to selectively connect air supplied to the first blower to the main pipe and the discharge pipe;
A heat supply pipe connecting the heat source to the main pipe in front of the selection valve;
An isolation valve disposed at a branch point between the main pipe and the heat supply pipe to regulate heat supplied from the heat source to the main pipe by driving the second blower, and
A circulation control valve provided in front of the oxidation catalyst to regulate circulation from the oxidation catalyst to the circulation line connected to the heat source.
Air pollutant reduction device further comprising a. According to claim 4,
The air pollutant reduction device is provided with a plurality of the adsorbent and the oxidation catalyst and is repeatedly disposed in the main pipe. According to claim 1,
A blow pipe in which the first blower is installed;
A first branch pipe branched from the blower pipe and in which a first adsorbent and a first oxidation catalyst are disposed;
A second branch pipe branched from the blower pipe and in which a second adsorbent and a second oxidation catalyst are disposed;
A selection valve disposed at the branch point of the blower pipe, the first branch pipe, and the second branch pipe to selectively connect the air supplied to the first blower to the first branch pipe and the second branch pipe;
A first heat supply pipe and a second heat supply pipe respectively connecting the heat source to the first branch pipe and the second branch pipe in front of the selection valve;
A first check-off valve and a second check-off valve respectively disposed in front of the heat source and regulating heat supplied from the heat source to the first branch pipe and the second branch pipe by driving the second blower, respectively, and
To the circulation line provided in front of the first oxidation catalyst and the second oxidation catalyst of each of the first branch pipe and the second branch pipe and connected to the heat source from the first oxidation catalyst and the second oxidation catalyst. The first circulation shutoff valve and the second circulation shutoff valve that regulates the circulation of
Air pollutant reduction device further comprising a. According to claim 6,
The first adsorbent, the second adsorbent, the first oxidation catalyst, and the second oxidation catalyst are each provided in plurality,
The first adsorbent and the first oxidation catalyst are repeatedly disposed in the first branch pipe,
Air pollutant reduction device in which the second adsorbent and the second oxidation catalyst are repeatedly disposed in the second branch pipe. According to claim 1,
The air pollutant reduction device formed by coating the adsorbent and the oxidation catalyst on a carrier. According to claim 1,
Wherein the heat source is one of a burner, an electric heater, and a plasma. According to claim 1,
The heat source is an air pollutant reduction device that is one of arc plasma, radio frequency (RF) plasma, and microwave plasma. According to claim 1,
The adsorbent is an air pollutant reduction device comprising a zeolite-based material. According to claim 1,
A blow pipe in which the first blower is installed;
A first branch pipe in which a first adsorbent is disposed branched from the blower pipe;
A second branch pipe in which a second adsorbent is disposed branched from the blower pipe;
A selection valve disposed at the branch point of the blower pipe, the first branch pipe, and the second branch pipe to selectively connect the air supplied to the first blower to the first branch pipe and the second branch pipe;
A first heat supply pipe and a second heat supply pipe respectively connecting the heat source to the first branch pipe and the second branch pipe in front of the selection valve;
A first shut-off valve and a second shut-off valve respectively disposed in front of the heat source and regulating heat supplied from the heat source to the first branch pipe and the second branch pipe by driving the second blower, respectively;
To the circulation line provided in front of the first adsorbent and the second adsorbent of each of the first branch pipe and the second branch pipe and connected from the first adsorbent and the second adsorbent to the oxidation catalyst and the heat source. The first circulation shutoff valve and the second circulation shutoff valve that regulates the circulation of
Air pollutant reduction device further comprising a. According to claim 12,
The oxidation catalyst is an air pollutant reduction device disposed in the circulation line.