KR20010045069A - Catalytic Incinerator with Dual-function Catalysts of Adsorption and Oxidation for VOCs Removal - Google Patents

Abstract

PURPOSE: Disclosed is a volatile organic compounds (VOC) control system using a bi-functional catalyst by an adsorption and an oxidation processes. The used catalyst plays two roles for adsorption and oxidation of VOC. CONSTITUTION: The system (100) is composed of a feed section (110), a blower (120), an adsorption section (130), an oxidation section (140), an exhaust section (150), a pipe (160,162,164,172,174), a heat exchanger (170), a blower (120), a heater (134, 144), and a control section. The flue gas is induced into the adsorption section (130) by the blower (120) through the feed section (110) and the pipe (160). The catalyst for adsorption and oxidation is composed of one species of ZSM-5, alumina, or titania as catalytic support and one species of Cu, Cr, Co, Pt, Pd, or metal oxides as active composition. The adsorption process is operated below 50 deg.C or at ambient condition. When the adsorption process over the catalyst (132) gets the set point of adsorbing concentration, the heater (134) is operated to increase the inner temperature of the adsorption section (130) and desorb the adsorbed gas on the catalyst (132). The temperature of the desorption is an ambient temperature or below 300 deg.C. The desorbed VOC gas is induced into the oxidation section (140) through a pipe (162) and oxidized at 250-500 deg.C. The blower (120) for induction of flue gas containing VOC or exhaust of the treated gas is set at the front part of the feed section (110) or the rear part of the exhaust section (150).

Description

Catalytic Incinerator with Dual-function Catalysts of Adsorption and Oxidation for VOCs Removal

The present invention relates to a VOC removal system using an adsorption / oxidizing bifunctional catalyst, and more particularly, a bifunctional that adsorbs volatile organic compounds discharged at low concentrations and oxidizes volatile organic compounds adsorbed when necessary. The present invention relates to a VOC removal system using an adsorption / oxidation bifunctional catalyst capable of removing VOC using a catalyst.

In general, volatile organic compounds (VOCs) emitted during automobile exhaust and evaporation gas, gas stations, painting, printing, and various industrial processes are classified into super volatile organic compounds (Very VOC), volatile organic compounds, and semi It can be classified into volatile organic compound (Semi VOC), particulate organic matter (Particulate Organic Matter) and the like.

As mentioned above, VOCs are known to cause leukemia, central nervous system disorders, and chromosomal abnormalities in benzene. Indirect secondary hazards include NOx and other chemicals present in the atmosphere. Photochemical reactions generate ozone (O3), which is the cause of photochemical smog, or photochemical smog caused by strongly acidic secondary pollutants such as peroxy-acetylnitrate (PAN), destroying the ozone layer in the stratosphere, and the earth. It has a devastating adverse effect on the environment and human body such as warming.

As a result, regulations on the emission of VOCs are being strengthened in each country, and the regulatory means for the emission of these VOCs are diversified in foreign countries. It calls for the reduction of substances (more than 70% of which are VOCs) to 90% of the current emissions, and in Europe, in the VOC's air pollution control measures, member countries have adopted 30 countries in 1999. It aims to reduce VOCs by more than%, and in Korea, it aims to reduce more than 50% of VOC emissions by 2000, and has been exempted from the emission regulations, gas stations, painting facilities, printing facilities, The current situation is tightening regulations on laundry facilities.

Meanwhile, as part of efforts to remove VOCs, commercialized VOC removal technologies, which are currently widely adopted worldwide, include catalytic oxidation, adsorption treatment, and direct combustion.

Among the above-mentioned VOC removal technologies, the high-temperature incineration method (direct combustion method), which is equipped with a thermal energy recovery facility, is used to decompose exhaust gas through combustion, and is widely used compared to other technologies, and can remove VOCs by 95 to 99%. However, when operating under low VOC concentration, fuel must be supplied from the outside to the heat source, so the operation cost is high, and when the exhaust gas contains a halogen compound or a large amount of inorganic metal compound, Additional incinerators are required, and there are disadvantages such as the possibility of generating NOx at high temperatures.

Adsorption treatment is a method of contacting a gas with a solid adsorbent to collect, collect and retain contaminants on the surface of the adsorbent, which is easier to operate than other methods, requires less operating cost or equipment investment, and has a higher concentration of pollutants in the exhaust gas. It can be used even when extremely low or contaminants are not flammable, and low volatility and high molecular weight compounds have the advantage of being almost completely eliminated, while desorption is difficult during regeneration of adsorbents and can cause secondary contamination, Materials with high volatility and molecular weight of 45 or less are not easily adsorbed by the adsorbent, and the adsorbent is sensitive to the state of the exhaust gas, which requires a pretreatment process such as filtration, cooling, and water removal.

On the other hand, catalytic oxidation method is suitable for the treatment of waste gas containing low concentration of VOC or operation under changing conditions of flow rate and concentration, and it is possible to operate at low temperature with less energy consumption, less investment cost and operation cost than other systems. It has the advantage of relatively high efficiency, which is the area which has attracted the most attention recently.

As the catalytic oxidation catalyst of VOC, Pt / γ-Al ₂ O ₃ , Pd / γ-Al ₂ O ₃ granular catalyst and honeycomb catalyst, Cu, Cr, Mn, Fe, Ni, Co, V, Zn, Al, etc. Metals and metal oxides alone or mixed and introduced into carriers such as γ-Al ₂ O ₃ , SiO ₂ · Al ₂ O ₃ , TiO ₂ , zeolite, etc. Plovdivite catalysts containing metals are known, and precious metal catalysts are currently used in most commercial catalytic combustors.

Precious metal catalyst has the disadvantage of high price, but it has excellent low temperature activity and shows high activity even in small amount of loading, and it is used by coating on honeycomb material. There is an economic advantage if the recovery system of the catalyst is established.

On the other hand, since the metal oxide catalyst cannot obtain sufficient activity unless it is a high temperature, it cannot be used for a large space velocity.

The present invention was devised to solve the above-mentioned problems, and is usually scaled by using a catalyst for removing volatile organic compounds that can adsorb volatile organic compounds discharged at low concentrations and oxidize volatile organic compounds adsorbed when necessary. Unlike the large thermal incinerator, the object is to provide a VOC removal system using an adsorption / oxidation bifunctional catalyst that can remove VOC at each site.

The present invention configured to achieve the above object is as follows. That is, a blower for flowing the industrial waste gas introduced through the waste gas inlet; The industrial waste gas flown by the blower is introduced to absorb volatile organic compounds in the industrial waste gas through a catalyst installed therein, and when the concentration of the adsorbed volatile organic compounds reaches a certain concentration, the internal temperature is raised by a heater installed therein. A VOC adsorption unit for desorbing the volatile organic compound adsorbed on the catalyst; A VOC oxidizing unit which introduces a volatile organic compound which is desorbed from the catalyst of the VOC adsorption unit and flows, and oxidizes the volatile organic compound and discharges it to the outside air by heating the catalyst and the heater installed therein; An oxidizing gas exhaust unit installed at one side of the VOC oxidizing unit to discharge the oxidized gas to outside air; A waste gas flow pipe connecting the blower, the VOC adsorption unit and the VOC oxidation unit to guide industrial waste gas sequentially; A waste gas bypass flow pipe for guiding industrial waste gas introduced from the waste gas inlet to a waste gas flow pipe connecting the VOC adsorption unit and the VOC oxidation unit from the waste gas flow pipe connecting the blower and the VOC adsorption unit; A heat exchanger for heat-exchanging the oxidizing gas discharged to the outside through the oxidizing gas exhaust unit; An oxidizing gas flow pipe guiding the oxidizing gas discharged from the VOC oxidizing unit to a heat exchanger; A heat exchange gas exhaust pipe for discharging the gas heat exchanged by the heat exchanger to the outside; It includes a control unit for controlling the blower, the heater and the heat exchanger.

The catalyst installed in the VOC adsorption section and the VOC oxidation section is composed of copper, chromium, cobalt, platinum, palladium, or the like on one carrier selected from the group consisting of ZSM-5, alumina, or titania in which the SiO2 / Al2O3 ratio is optimally controlled. It may be a catalyst for adsorption / oxidation bifunctional volatile organic compound incorporating a metal or metal oxide selected from the group consisting of an oxide of.

The temperature condition of adsorption and desorption of volatile organic compounds in the VOC adsorption unit is preferably in the range of 300 ° C. at room temperature (below 50 ° C.).

Temperature condition during oxidation of volatile organic compounds in the VOC oxidation unit is preferably in the range of 250 to 500 ° C.

A waste gas flow pipe connecting the blower and the VOC adsorption unit may be installed through the heat exchanger.

Each of the waste gas flow pipe and the waste gas bypass flow pipe connecting the VOC adsorption unit and the VOC oxidation unit may be further provided with a throttle valve for controlling the flow of the industrial waste gas by a control unit.

The waste gas bypass flow pipe is suitably connected to the waste gas flow pipe between the throttle valve and the VOC oxidizer installed in the waste gas flow pipe connecting the VOC adsorption section and the VOC oxidation section.

One side of the oxidizing gas exhaust and the oxidizing gas flow pipe may be further provided with a throttle valve for controlling the amount of oxidizing gas discharged to the outside by the control unit and the oxidizing gas flowing into the heat exchanger.

The oxidizing gas flow pipe is suitably connected between the throttle valve installed in place of the VOC oxidizing unit and the oxidizing gas exhaust.

On the other hand, another configuration of the present invention is a blower for flowing the industrial waste gas introduced through the waste gas inlet; When the concentration of the catalyst adsorbing the volatile organic compounds in the industrial waste gas flown by the blower reaches a certain concentration, the heater is installed to increase the internal temperature to desorb the volatile organic compounds adsorbed on the catalyst. Two VOC adsorption units for desorption of volatile organic compounds on the other side when the volatile organic compounds are adsorbed; A VOC oxidizing unit which introduces a volatile organic compound which is desorbed from the catalyst of the VOC adsorption unit and flows, and oxidizes the volatile organic compound and discharges it to the outside air by heating the catalyst and the heater installed therein; An oxidizing gas exhaust unit installed at one side of the VOC oxidizing unit to discharge the oxidized gas to outside air; A waste gas flow pipe connecting the blower, the VOC adsorption unit and the VOC oxidation unit to guide industrial waste gas sequentially; A waste gas bypass flow pipe for guiding industrial waste gas introduced from the waste gas inlet to a waste gas flow pipe connecting the VOC adsorption unit and the VOC oxidation unit from the waste gas flow pipe connecting the blower and the VOC adsorption unit; A heat exchanger for heat-exchanging the oxidizing gas discharged to the outside through the oxidizing gas exhaust unit; An oxidizing gas flow pipe guiding the oxidizing gas discharged from the VOC oxidizing unit to a heat exchanger; A heat exchange gas exhaust pipe for discharging the gas heat exchanged by the heat exchanger to the outside; It may include a control unit for controlling the blower, the heater and the heat exchanger.

The catalyst installed in the VOC adsorption section and the VOC oxidation section is composed of copper, chromium, cobalt, platinum, palladium, or the like on one carrier selected from the group consisting of ZSM-5, alumina, or titania in which the SiO2 / Al2O3 ratio is optimally controlled. It may be a catalyst for adsorption / oxidation bifunctional volatile organic compound incorporating a metal or metal oxide selected from the group consisting of an oxide of.

The temperature condition of adsorption and desorption of volatile organic compounds in the VOC adsorption unit is in the range of 300 ° C. at room temperature (below 50 ° C.), and the temperature condition of oxidation of volatile organic compounds in the VOC oxidation unit is in the range of 250˜500 ° C. .

A waste gas flow pipe connecting the blower and the VOC adsorption unit may be installed through the heat exchanger.

Each of the waste gas flow pipe and the waste gas bypass flow pipe connecting the VOC adsorption unit and the VOC oxidation unit may be further provided with a throttle valve for controlling the flow of the industrial waste gas by a control unit.

One side of the oxidizing gas exhaust and the oxidizing gas flow pipe may be further provided with a throttle valve for controlling the amount of oxidizing gas discharged to the outside by the control unit and the oxidizing gas flowing into the heat exchanger.

The oxidizing gas flow pipe is suitably connected between the throttle valve installed in place of the VOC oxidizing unit and the oxidizing gas exhaust.

1 is a schematic view showing a VOC removal system according to the present invention.

2 is a schematic view showing another example of a VOC removal system according to the present invention.

** Description of symbols for the main parts of the drawing **

100. VOC removal system 110. Waste gas inlet

120. Blower 130. VOC adsorption part

132, 142. Catalyst 134, 144. Heater

140. VOC oxidation section 150. Oxidation gas exhaust section

160, 162. Waste gas flow pipe 164. Waste gas bypass flow pipe

170. Heat exchanger 172. Oxide gas flow pipe

180, 182, 184, 186. Throttle Valve

200. VOC removal system 210. Waste gas inlet

220. Blowers 230, 230a. VOC adsorption part

232, 232a, 242. Catalyst 234, 234a, 244. Heater

240. VOC oxidation part 250. Oxidation gas exhaust part

260, 262. Waste gas flow pipe

264. Waste gas bypass flow pipe

270. Heat Exchanger

272. Oxide gas flow pipe

280, 280a, 282, 284, 286. Throttle valve

First, before describing the present invention, when looking at the volatile organic compounds (VOC), VOC has a number of disputes in the definition, but WHO is defined based on the boiling point of the organic compound. That is, when the boiling point is 0 to 100 ° C., a super volatile organic compound (Very VOC) and a range of 100 to 260 ° C. are referred to as a volatile organic compound (VOC) and a range of 260 to 400 ° C. is called a semi volatile organic compound (Semi VOC). Particulate Organic Matter, which is in the range of 380 ℃, is commonly referred to as Particulate Organic Matter. VOC in Korea's Occupational Safety and Health Act refers to ozone that causes photochemical smog through photochemical reaction with NOx and other chemicals in the atmosphere. It is defined as a substance that generates (O3).

The present invention is a catalyst capable of adsorbing volatile organic compounds discharged at low concentrations and oxidizing volatile organic compounds adsorbed when necessary, in which the ratio of SiO ₂ / Al ₂ O ₃ is optimally controlled is ZSM-5 and alumina. Alternatively, catalysts in which metals or metal oxides such as copper, chromium, cobalt, platinum and palladium are introduced into a carrier such as titania can remove volatile organic compounds emitted from a small workplace unlike large heat incinerators. So that there is one VOC removal system.

In the description of the volatile organic compound to be described in the detailed description of the invention, "volatile organic compound" or "VOC" is written in parallel.

Hereinafter, with reference to the accompanying drawings will be described in detail for the VOC removal system using the adsorption / oxidation bifunctional catalyst according to a preferred embodiment of the present invention.

1 is a schematic view showing a VOC removal system according to the present invention.

As shown in FIG. 1, the VOC removal system 100 using the adsorption / oxidation bifunctional catalyst according to the present invention includes a waste gas inlet 110, a blower 120 for flowing industrial waste gas, and a VOC for adsorption and desorption. Adsorption unit 130, VOC oxidizing unit 140 for oxidizing VOC, oxidizing gas exhaust unit 150 for discharging oxidizing gas to the outside, waste gas flow pipes (160, 162) for guiding industrial waste gas, waste gas inlet ( Waste gas bypass flow pipe 164 for guiding the industrial waste gas introduced from 110 to the waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidizing unit 140, and a heat exchanger for introducing and exchanging oxidizing gas. 170, an oxidizing gas flow pipe 172 for guiding the oxidizing gas to the heat exchanger 170, a heat exchange gas exhaust pipe 174 and a blower 120 for discharging the heat exchange gas to the outside, a heater 134, 144, Control unit (not shown) for controlling the heat exchanger 170 It is broken.

Referring to the operation of the volatile organic compound removal system 100 using the adsorption / oxidation bifunctional catalyst configured as described above are as follows. First, when the industrial waste gas is introduced through the waste gas inlet 110 while the power is on, the waste gas flow pipe 160 between the waste gas inlet 110 and the VOC adsorption unit 130 by the blower 120. ) Flows into the inside of the VOC adsorption unit 130, and the volatile organic compounds in the industrial waste gas introduced into the VOC adsorption unit 130 are adsorbed to the catalyst 132. At this time, the adsorption of volatile organic compounds is carried out at room temperature (less than 50 ℃).

On the other hand, when volatile organic compounds continuously introduced are adsorbed on the catalyst 132 and the concentration is constant, the heater 134 is operated to raise the internal temperature of the VOC adsorption unit 130 to adsorb the volatile organic compounds adsorbed on the catalyst 132. Desorption At this time, the temperature conditions at the time of desorption of the volatile organic compound range from room temperature (less than 50 ℃) to 300 ℃.

The volatile organic compound desorbed under the above-described temperature conditions flows through the waste gas flow pipe 162 between the VOC adsorption unit 130 and the VOC oxidizing unit 140 and flows into the VOC oxidizing unit 140, and the VOC The volatile organic compound introduced into the oxidizing unit 140 is oxidized in the VOC oxidizing unit 140 and discharged to the outside air. At this time, the temperature condition inside the VOC oxidizing unit 140 is in the range of 250 ~ 500 ℃ that can oxidize the volatile organic compounds introduced.

On the other hand, when the desorbed volatile organic compound flows from the VOC adsorption section 130 to the VOC oxidation section 140, the VOC adsorption section (from the waste gas flow pipe 160 connecting the blower 120 and the VOC adsorption section 130) Waste gas connecting the industrial waste gas to the VOC adsorption unit 130 and the VOC oxidizing unit 140 through the waste gas bypass flow pipe 164 connected to the waste gas flow pipe 162 connecting the 130 and the VOC oxidizing unit 140. Flows into the flow pipe 162. The industrial waste gas introduced in this way is introduced into the waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidizing unit 140 without passing through the VOC adsorption unit 130. Desorbed volatile organic compounds flowing to 140 are diluted while lowering the temperature in the VOC oxidation unit 140.

Referring to the VOC removal system 100 using the adsorption / oxidation bifunctional catalyst of the present invention in more detail as follows. First, the waste gas inlet 110 allows the industrial waste gas discharged from an oil storage facility, a gas station, a painting facility, a printing facility, a laundry facility, and the like.

Blower 120 is for flowing the industrial waste gas flowing through the waste gas inlet 110, this blower 120 is to be installed in the front of the waste gas inlet 110 or the oxidizing gas exhaust 150 to be described later Can be. The blower 120 installed as described above flows the industrial waste gas introduced through the waste gas inlet 110 through the waste gas flow pipes 160 and 162 to finally discharge the oxidizing gas to the outside air.

The VOC adsorption unit 130 is a device for adsorbing volatile organic compounds in the industrial waste gas introduced through the waste gas inlet unit 110. The catalyst 132 adsorbs volatile organic compounds in the VOC adsorption unit 130. And a heater 134 for increasing the internal temperature of the VOC adsorption unit 130 to desorb the volatile organic compound adsorbed to the catalyst 132.

The catalyst 132 described above is composed of ZSM-5, alumina or titania with an optimally controlled ratio of SiO ₂ / Al ₂ O ₃ as described in September 20, 1999, patent application 99-40342. It is a catalyst for removing volatile organic compounds in which a metal or metal oxide selected from the group consisting of copper, chromium, cobalt, platinum, palladium or oxides thereof is introduced into one carrier selected from.

On the other hand, the adsorption of volatile organic compounds in the VOC adsorption unit 130 is carried out at room temperature (50 ° C. or less), and the desorption of volatile organic compounds is performed at room temperature (50 ° C. or less) by 300 ° C. due to the elevated temperature of the heater 134. Is done between the ranges. Accordingly, the volatile organic compounds in the industrial waste gas continuously introduced into the VOC adsorption unit 130 are adsorbed by the catalyst 132 at room temperature (50 ° C. or less), and the temperature inside the VOC adsorption unit 130 is increased by the heater 134. The volatile organic compound adsorbed on the catalyst 132 is desorbed at a temperature of 300 ° C. at room temperature (below 50 ° C.). At this time, the desorption of the volatile organic compound adsorbed on the catalyst 132 is performed in a state in which the concentration of the volatile organic compound is constant in the VOC adsorption unit 130. The desorbed volatile organic compound is introduced into the VOC oxidation unit 140 via a waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidation unit 140.

The VOC oxidizing unit 140 is a device for oxidizing the introduced volatile organic compound, and the inside of the VOC oxidizing unit 140 includes the catalyst 142 and the VOC oxidizing unit 140 which are involved in the oxidation of the volatile organic compound. A heater 144 is installed to oxidize the volatile organic compound introduced by raising the internal temperature.

The catalyst 142 installed inside the VOC oxidizing unit 140 described above is also described in the patent application No. 99-40342 dated September 20, 1999, similarly to the catalyst 132 installed inside the VOC absorbing unit 130. From a group consisting of copper, chromium, cobalt, platinum, palladium or oxides thereof in one carrier selected from the group consisting of ZSM-5, alumina or titania with an optimally controlled SiO ₂ / Al ₂ O ₃ ratio A catalyst for removing volatile organic compounds incorporating a selected metal or metal oxide. Therefore, it can be seen that the above-described catalysts 132 and 142 installed in the VOC adsorption unit 130 and the VOC oxidation unit 140 are catalysts for removing adsorption / oxidizing bifunctional volatile organic compounds.

On the other hand, the inside of the VOC oxidizing unit 140 must be elevated to the oxidation temperature of the volatile organic compound before the volatile organic compound is introduced. At this time, the temperature condition at the time of oxidation of the volatile organic compound is in the range of 250 ~ 500 ℃.

The oxidizing gas of the volatile organic compound oxidized in the VOC oxidizing unit 140 is discharged to the outside air through the oxidizing gas exhaust unit 150 installed on the VOC oxidizing unit 140.

The waste gas flow pipes 160 and 162 are guide tubes for guiding the industrial waste gas introduced through the waste gas inlet 110 to the VOC adsorption unit 130 and the VOC oxidizing unit 140, and the waste gas flow pipes 160 and 162. ) Connects the blower 120 and the VOC adsorption unit 130 and the VOC adsorption unit 130 and the VOC oxidation unit 140. At this time, the waste gas flow pipe 160 connecting the blower 120 and the VOC adsorption part 130 passes through the heat exchanger 170 to connect the blower 120 and the VOC adsorption part 130.

Therefore, when the oxidizing gas is introduced into the heat exchanger 170 through the oxidizing gas flow pipe 172 to be described later and undergoes heat exchange, the waste gas flow pipe 160 connecting the blower 120 and the VOC adsorption unit 130 is described. Industrial waste gas flowing through is introduced into the VOC adsorption unit 130 in a state where the temperature is elevated by the heat exchanger 170.

The waste gas bypass flow pipe 164 is a guide pipe for introducing the industrial waste gas introduced from the waste gas inlet 110 into the waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidizing unit 140. The waste gas bypass flow pipe 164 connects the industrial waste gas to the VOC adsorption unit 130 and the VOC oxidation unit 140 when the volatile organic compound desorbed from the VOC adsorption unit 130 flows into the VOC oxidation unit 140. The dilution of the volatile organic compound introduced into the VOC oxidizing unit 140 from the VOC adsorption unit 130 to lower the temperature in the VOC oxidizing unit 140 by allowing the waste gas flow pipe 162 to flow into the waste gas flow pipe 162. That is, when the temperature of the VOC oxidizing unit 140 becomes more than a predetermined time when the volatile organic compound is oxidized, the control unit opens the throttle valve 182 installed in the waste gas bypass flow pipe 164 to introduce the volatile organic compound introduced into the VOC oxidizing unit 140. At the same time as the dilution of the compound lowers the temperature of the VOC oxidation section 140. By such a function, the waste gas bypass flow pipe 164 serves to prevent overheating of the VOC oxidation unit 140.

The heat exchanger 170 is used to heat and discharge the oxidizing gas discharged to the outside through the oxidizing gas exhaust unit 150. The heat exchanger 170 is an oxidizing gas flow pipe connected to the oxidizing gas exhaust unit 150 ( The oxidizing gas is introduced through the heat exchanger through the heat exchanger 172 and then discharged to the outside through the heat exchange gas exhaust pipe 174.

The controller (not shown) will control the entire VOC removal system 100 using the adsorption / oxidation bifunctional catalyst of the present invention. That is, the control unit controls the operation of the heater 134 inside the VOC adsorption unit 130 by checking the concentration of the volatile organic compounds adsorbed inside the VOC adsorption unit 130, or the desorbed volatile organic compounds are the VOC oxidation unit ( The heater 144 is operated before the flow into the 140 to control the temperature inside the VOC oxidizing unit 140. In addition, the controller may control the blower 120 and the throttle valves 180, 182, 184, and 186 to be described later.

Meanwhile, the control unit controls the waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidation unit 140 of the VOC removal system 100 using the adsorption / oxidation bifunctional catalyst having the above-described configuration. Is further provided with a throttle valve 180 to control the flow of the waste gas flowing into the VOC oxidizing unit 140 from the VOC adsorption unit 130.

When the concentration of the volatile organic compounds introduced into the VOC adsorption unit 130 is greater than or equal to a predetermined level, the blower 120 and the VOC adsorption unit 130 are used to dilute the concentration of the volatile organic compounds introduced into the VOC oxidation unit 140. The waste gas bypass flow pipe 164 is connected to the waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidizing unit 140 from the waste gas flow pipe 160 connecting the. At this time, one end of the waste gas bypass flow pipe 164 connected to the waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidation unit 140 is the VOC adsorption unit 130 and the VOC oxidation unit 140. It is connected to the waste gas flow pipe 162 between the throttle valve 180 and the VOC oxidizing unit 140 installed in the waste gas flow pipe 162 connecting the. The waste gas bypass flow pipe 162 installed as described above serves to prevent overheating of the VOC oxidation unit 140.

The oxidizing gas discharged to the outside air by the control unit is also introduced into the heat exchanger 170 even at one side of the oxidizing gas flow pipe 172 which guides the oxidizing gas exhaust unit 150 and the oxidizing gas to the heat exchanger 170. Throttle valves 184 and 186 are further provided to control the amount of oxidizing gas. At this time, the oxidizing gas flow pipe 172 is connected between the VOC oxidizing unit 140 and the throttle valve 184 installed in place of the oxidizing gas exhaust unit 150.

Operation of the VOC removal system 100 using the adsorption / oxidation bifunctional catalyst according to the present invention configured as described above is as follows. First, the blower 120 is operated while the power supply of the apparatus 100 according to the present invention is turned on. The industrial waste gas introduced through the waste gas inlet unit 110 while the blower 120 is operated flows to the VOC adsorption unit 130. At this time, the waste gas passing through the adsorption layer passes through the waste gas flow pipe 162 and the VOC oxidizing unit 140 connecting between the VOC adsorption unit 130 and the VOC oxidizing unit 140, and then the oxidizing gas exhaust unit 150. The exhaust throttle valve 186 installed in the circulating gas flow pipe 172 is closed.

The volatile organic compounds in the industrial waste gas continuously introduced into the VOC adsorption unit 130 are adsorbed by a catalyst 132 installed in the VOC adsorption unit 130. At this time, the temperature inside the VOC adsorption unit 130 is room temperature (50 ° C. or less).

On the other hand, when the volatile organic compound adsorbed by the catalyst 132 reaches a certain concentration, the volatile organic compound is desorbed and oxidized in the VOC oxidizing unit 140. VOC oxidation by opening the throttle valve 182 installed in the waste gas bypass flow pipe 164 to flow into the waste gas flow pipe 162 connecting the VOC adsorption unit 130 and the VOC oxidizing unit 140. While diluting the concentration of the volatile organic compounds introduced into the unit 140, the temperature of the VOC oxidation unit 140 is lowered.

When the volatile organic compound adsorbed on the catalyst 132 inside the VOC adsorption unit 130 reaches a predetermined concentration, the controller operates the heater 134 inside the VOC adsorption unit 130 to adsorb the volatile organic compound adsorbed on the catalyst 132. The temperature is raised to the desorption temperature of. The temperature at this time is a range of about 300 degreeC at about room temperature. As the temperature inside the VOC adsorption unit 130 increases, the volatile organic compound adsorbed on the catalyst 132 is desorbed, and the desorption is terminated in the 300 ° C range.

When the volatile organic compounds are desorbed from the catalyst 132 installed inside the VOC adsorption unit 130, the inside of the VOC oxidizing unit 140 controls the controller before the volatile organic compounds desorbed from the VOC adsorption unit 130 is introduced. The heater 144 is operated to raise the temperature to the oxidation temperature of the volatile organic compound. On the other hand, the throttle valve 186 provided in the oxidizing gas flow pipe 172 is in a closed state.

The volatile organic compounds introduced into the VOC oxidizing unit 140 are oxidized by the temperature inside the VOC oxidizing unit 140 and the catalyst 142. At this time, the temperature inside the VOC oxidation unit 140 is in the range of 250 to 500 ° C. The oxidizing gas of the volatile organic compound is discharged to the outside through the oxidizing gas exhaust unit 150 when the throttle valve 184 of the oxidizing gas exhaust unit 150 is opened and the throttle valve 186 of the oxidizing gas flow pipe 172 is closed. Discharged.

On the other hand, when the throttle valve 184 of the oxidizing gas exhaust unit 150 is closed and the throttle valve 186 on the oxidizing gas flow pipe 172 side is open, the oxidizing gas of the volatile organic compound is the oxidizing gas flow pipe 172. Through the heat exchanger 170 is introduced. The oxidizing gas introduced into the heat exchanger 170 is discharged to outside air through the exhaust pipe 174 after heat exchange.

When summarized and summarized VOC removal system 100 using the adsorption / oxidation bifunctional catalyst according to the present invention as described above. The present invention adsorbs volatile organic compounds in industrial waste gas through a waste gas inlet 110 through which industrial waste gas flows, a blower 120 for flowing industrial waste gas, and a catalyst 132 installed therein by introducing industrial waste gas. When the concentration of the adsorbed volatile organic compounds reaches a certain concentration, the internal temperature is raised by the heater 134 installed therein, and the VOC adsorption unit 130 and the VOC adsorption unit 130 are used to desorb the volatile organic compounds adsorbed on the catalyst 132. VOC oxidizing unit 140 for introducing a volatile organic compound desorbed and flowed from the catalyst 132 of 130 and oxidizing the volatile organic compound to the outside by heating the catalyst 142 and the heater 144 installed therein. ), The oxidizing gas exhaust unit 150 installed in one position of the VOC oxidizing unit 140 to discharge the oxidized gas to the outside, the blower 120 and the VOC adsorption unit 130 and the VOC oxidizing unit 140 are connected. Industrial waste gas Waste gas flow connecting the VOC adsorption unit 130 and the VOC oxidizing unit 140 from the waste gas flow pipe 160 connecting the guided waste gas flow pipes 160 and 162 and the blower 120 and the VOC adsorption unit 130. Heat exchanger for introducing heat to the oxidized gas discharged to the outside through the waste gas bypass flow pipe 164 for guiding the industrial waste gas introduced from the waste gas inlet 110 to the pipe 162 and the oxidizing gas exhaust unit 150 ( 170, an oxidizing gas flow pipe 172 for guiding the oxidized gas discharged from the VOC oxidizing unit 140 to the heat exchanger 170, and a heat exchange gas exhaust pipe for discharging the gas heat exchanged by the heat exchanger 170 to the outside air. 174 and the blower 120, the heaters 134 and 144, and a control unit for controlling the heat exchanger (170).

In this case, the catalysts 132 and 142 installed in the VOC adsorption unit 130 and the VOC oxidation unit 140 may be formed of ZSM-5, alumina, or titania in which the ratio of SiO ₂ / Al ₂ O ₃ is optimally adjusted. A catalyst for adsorption / oxidizing bifunctional volatile organic compounds in which a metal or metal oxide selected from the group consisting of copper, chromium, cobalt, platinum, palladium or oxides thereof is introduced into one selected carrier.

Temperature conditions of adsorption and desorption of the volatile organic compound in the VOC adsorption unit 130 range from room temperature (50 ° C. or less) to 300 ° C., and temperature conditions of oxidation of the volatile organic compound in the VOC oxidation unit 140 are 250˜. 500 ° C.

2 is a schematic view showing another example of a VOC removal system according to the present invention.

As shown in FIG. 2, the VOC removal system 200 using the adsorption / oxidation bifunctional catalyst of the present invention comprises two VOC adsorption units 230 and 230a to adsorb volatile organic compounds at one side of the VOC adsorption unit 230. This progresses, and the desorption is progressed in the other VOC adsorption unit 230a.

That is, another configuration of the present invention is an industrial waste gas flown by the blower 220 and the blower 220 for flowing the industrial waste gas introduced through the waste gas inlet 210, the waste gas inlet 210 through which the industrial waste gas is introduced. The catalysts 232 and 232a for adsorbing VOCs and the heaters 234 and 234a for desorbing VOCs adsorbed on the catalysts 232 and 232a are respectively installed when the concentration of the adsorbed VOCs reaches a certain concentration. When VOC adsorption is performed on one side, the VOC desorbed from the two VOC adsorption units 230 and 230a and the catalysts 232 and 232a of the VOC adsorption units 230 and 230a are introduced. On the other hand, the VOC oxidizing unit 240 and VOC oxidizing unit 240, which oxidizes VOCs and discharges them to outside air by heating the catalyst 242 and the heater 244 installed therein, oxidize the gas oxidized to the outside air. Oxygen gas exhaust unit 250, blower 220 and VOC suction The waste gas flow pipes 260, 260a, 262, and 262a for guiding the industrial waste gas by connecting the landing parts 230 and 230a and the VOC oxidizing unit 240 to connect the blower 220 and the VOC adsorption units 230 and 230a are provided. From the waste gas flow pipe (260, 260a) to the waste gas flow pipe (262, 262a) connecting the VOC adsorption unit (230, 230a) and the VOC oxidizing unit 240 guides the industrial waste gas introduced from the waste gas inlet (210) The heat exchanger 270 and the oxidizing gas discharged from the VOC oxidizing unit 240 inflow and exchange heat of the oxidizing gas discharged to the outside through the waste gas bypass flow pipe 264, the oxidizing gas exhausting unit 250. Oxidizing gas flow pipe 272 leading to 270, heat exchange gas exhaust pipe 274 for blowing gas heat exchanged by heat exchanger 270 to outside air, blower 220, heaters 234, 234a, 244, It includes a control unit (not shown) for controlling the heat exchanger (270).

In the above-described configuration, the two VOC adsorption units 230 and 230a are devices for adsorbing and desorbing volatile organic compounds in the industrial waste gas introduced through the waste gas inlet unit 210, respectively. The heater 234 which desorbs the volatile organic compounds adsorbed on the catalysts 232 and 232a by raising the internal temperatures of the catalysts 232 and 232a for adsorbing the volatile organic compounds and the VOC adsorption units 230 and 230a. 234a) is installed.

The catalysts 232, 232a, and 242 installed inside the VOC adsorption unit 230 and 230a and the VOC oxidation unit 240 are as described in Patent Application No. 99-40342 of September 20, 1999, as described above. From a group consisting of copper, chromium, cobalt, platinum, palladium or oxides thereof in one carrier selected from the group consisting of ZSM-5, alumina or titania with an optimally controlled SiO ₂ / Al ₂ O ₃ ratio A catalyst for removing volatile organic compounds incorporating a selected metal or metal oxide.

Meanwhile, the waste gas bypass flow pipe 264 introduces the industrial waste gas introduced from the waste gas inlet 210 into the waste gas flow pipes 262 and 262a connecting the VOC adsorption units 230 and 230a and the VOC oxidizing unit 240. This waste gas bypass flow pipe 264 is a waste gas bypass flow pipe 264 is a VOC adsorption unit 230, 230a when the volatile organic compounds desorbed from the VOC adsorption unit 230, 230a is introduced into the VOC oxidation unit 240 ) Into the waste gas flow pipes 262 and 262a connecting the VOC oxidizing unit 240 to dilute the volatile organic compounds introduced into the VOC oxidizing unit 240 from the VOC adsorption units 230 and 230a and oxidize the VOC. It serves to lower the temperature in the unit 240. That is, when the temperature of the VOC oxidizing unit 240 is more than a predetermined time when the volatile organic compound is oxidized, the control unit opens the throttle valve 282 installed in the waste gas bypass flow pipe 264 and flows into the VOC oxidizing unit 240. While diluting the compound, the temperature of the VOC oxidation unit 240 is lowered. By such a function, the waste gas bypass flow pipe 264 serves to prevent overheating of the VOC oxidation unit 240.

The temperature condition of adsorption and desorption of volatile organic compounds in the VOC adsorption units 230 and 230a having the above-described configuration is 300 ° C. at room temperature (below 50 ° C.), and oxidation of volatile organic compounds in the VOC oxidation unit 240. Temperature conditions range from 250 to 500 ° C.

Each of the waste gas flow pipes 262 and 262a connecting the VOC adsorption units 230 and 230a and the VOC oxidation unit 240 is further provided with throttle valves 280 and 280a for controlling the flow of the industrial waste gas by the control unit.

The waste gas bypass flow pipe 264 connected to the waste gas flow pipes 262 and 262a between the VOC oxidation unit 240 and the throttle valves 280 and 280a is a volatile organic compound introduced into the VOC adsorption units 230 and 230a. When the desorption is more than a predetermined time is installed for the purpose of diluting the concentration of the VOC flowing into the VOC oxidizing unit 240, one side is further provided with a throttle valve 282 for controlling the flow rate by the control unit. In other words, the introduced industrial waste gas is introduced into the waste gas flow pipes 262 and 262a connecting the VOC adsorption units 230 and 230a and the VOC oxidizing unit 240 without passing through the VOC adsorption units 230 and 230a. The desorbed volatile organic compounds flowing from the units 230 and 230a to the VOC oxidizing unit 240 are diluted while lowering the temperature in the VOC oxidizing unit 240.

Throttle valves 284 and 286 for controlling the amount of the oxidized gas discharged to the outside air by the control unit and the oxidized gas introduced into the heat exchanger 270 in one place of the oxidizing gas exhaust unit 250 and the oxidizing gas flow pipe 272. ) Is installed.

The oxidizing gas flow pipe 272 is connected between the VOC oxidizing unit 240 and the throttle valve 284 installed in place of the oxidizing gas exhausting unit 250. In this way, the oxidizing gas flow pipe 272 is connected between the VOC oxidizing unit 240 and the throttle valve 284 provided at the oxidizing gas exhausting unit 250, so that the throttle valve 284 and the oxidizing gas on the side of the oxidizing gas exhausting unit 250 are oxidized. By the opening and closing action of the throttle valve 286 on the flow pipe 272 side, the oxidizing gas is discharged to the outside air or flows to the oxidizing gas flow pipe 272. That is, when the oxidizing gas exhaust part 250 side throttle valve 284 is closed and the oxidizing gas flow pipe 272 side throttle valve 286 is opened, the oxidizing gas flows into the oxidizing gas flow pipe 272, and the oxidation When the throttle valve 284 on the gas exhaust unit 250 side is opened and the throttle valve 286 on the oxidizing gas flow pipe 272 side is closed, the oxidizing gas is discharged to the outside air through the oxidizing gas exhaust unit 250.

Operation of the VOC removal system 200 using the adsorption / oxidation bifunctional catalyst according to the present invention configured as described above is as follows. First, when the blower 220 is operated while the power of the volatile organic compound removal system 200 according to the present invention is turned on, the waste gas inlet 210 allows the industrial waste gas to have one side of the VOC adsorption unit 230. Is adsorbed to the catalyst (232). At this time, when the volatile organic compound adsorbed to the VOC adsorption unit 230 at one side reaches a predetermined concentration, the heater 234 is operated to raise the volatile organic compound adsorbed to the catalyst 232 while raising the temperature of the VOC adsorption unit 230. Desorption.

The desorbed volatile organic compound is introduced into the VOC oxidizing unit 240 through the waste gas flow pipe 262 connecting the VOC oxidizing unit 240 to the catalyst 242 and the heater 244 installed inside the VOC oxidizing unit 240. It is oxidized by) and is discharged to outside air. At this time, the throttle valve 286 installed in the circulating gas flow pipe 272 is in a closed state. On the other hand, when the desorption of the volatile organic compounds adsorbed on the catalyst 232 by the elevated temperature of the heater 234 in one side of the VOC adsorption unit 230, the adsorption of volatile organic compounds is made in the other VOC adsorption unit 230a. .

On the other hand, when the volatile organic compound introduced into and adsorbed to the other VOC adsorption unit 230a reaches a predetermined concentration, the heater 234a is operated by the control of the controller to desorb the volatile organic compound and enter the VOC oxidation unit 240. do. At this time, one side of the VOC adsorption unit 230 is a state in which the adsorption of the volatile organic compound is continuously made, the desorbed volatile organic compound is VOC oxidation through the waste gas flow pipe 262a connecting the VOC oxidation unit 240 It is introduced into the unit 240 and is oxidized by the catalyst 242 and the heater 244 installed inside the VOC oxidizing unit 240 is discharged to the outside air.

On the other hand, if the temperature of the VOC oxidizing unit 240 is more than a predetermined time when the volatile organic compound is oxidized, the controller opens the throttle valve 282 installed in the waste gas bypass flow pipe 264, and the industrial waste gas introduced into the VOC adsorption unit 230, 230a) and the waste gas flow pipes 262 and 262a connecting the VOC oxidizing unit 240 to dilute the concentration of volatile organic compounds introduced into the VOC oxidizing unit 240 and at the same time Lower the temperature.

When the volatile organic compounds are desorbed from the catalysts 232 and 232a installed inside the VOC adsorption units 230 and 230a, the volatile organic compounds desorbed from the VOC adsorption units 230 and 230a are decomposed. Before the inflow, the heater 244 is operated by the control of the controller to raise the temperature of the volatile organic compound to the oxidation temperature. On the other hand, the throttle valve 286 provided in the oxidizing gas flow pipe 272 is in a closed state.

The oxidizing gas of the volatile organic compound is discharged to the outside air through the oxidizing gas exhaust unit 250 when the throttle valve 284 of the oxidizing gas exhaust unit 250 is opened and the throttle valve 286 on the oxidizing gas flow pipe 272 side is closed. Discharged.

On the other hand, when the throttle valve 284 of the oxidizing gas exhaust part 250 is closed and the throttle valve 286 on the oxidizing gas flow pipe 272 side is open, the oxidizing gas of the volatile organic compound is the oxidizing gas flow pipe 272. Through the heat exchanger 270 is introduced.

The VOC removal system 200 using the adsorption / oxidation bifunctional catalyst having the above-described configuration has a volatile organic compound in the VOC adsorption unit 230a of the other side when adsorption of the volatile organic compound is made in the VOC adsorption unit 230 of one side. While the desorption of the volatile organic compound flows to the VOC oxidizing unit 240, while the adsorption of the volatile organic compound in the VOC adsorption unit 230a on the other side of the VOC adsorption unit 230, the desorption of the volatile organic compound is performed It flows to the oxidation part 240.

By constructing two VOC adsorption units 230 and 230a as described above, the life of the VOC removal system 200 according to the present invention can be extended, and the removal efficiency of volatile organic compounds can be further improved.

The present invention is not limited to the above-described embodiments, and may be variously modified and implemented within the scope of the technical idea of the present invention.

As described above, according to the present invention, a metal or metal oxide such as copper, chromium, cobalt, platinum or palladium is introduced into a carrier such as ZSM-5, alumina or titania, in which the ratio of SiO ₂ / Al ₂ O ₃ is optimally controlled. By using the adsorption / oxidation bifunctional VOC removal catalyst, it is possible to remove volatile organic compounds discharged from a small work place, thereby effectively removing volatile organic compounds.

On the other hand, the present invention has the effect of further improving the removal efficiency of volatile organic compounds by using a catalyst for adsorption / oxidation bifunctional VOC removal.

In addition, the present invention can reduce the production cost of the volatile organic compound removal system by making the structure more simple.

Claims (16)

A blower for flowing the industrial waste gas introduced through the waste gas inlet; Adsorbs the volatile organic compounds in the industrial waste gas through a catalyst installed therein by flowing the industrial waste gas flowd by the blower, and when the concentration of the volatile organic compounds adsorbed reaches a certain concentration, A VOC adsorption unit for desorbing the volatile organic compound adsorbed on the catalyst by raising the temperature; A VOC oxidizing unit which introduces the volatile organic compound that is desorbed and flowed from the catalyst of the VOC adsorption unit and oxidizes the volatile organic compound and discharges it to outside air by raising a temperature of a catalyst and a heater installed therein; An oxidizing gas exhaust unit installed at one side of the VOC oxidizing unit to discharge the oxidized gas to outside air; A waste gas flow pipe connecting the blower, the VOC adsorption unit and the VOC oxidation unit to guide industrial waste gas sequentially; A waste gas bypass flow pipe for guiding industrial waste gas introduced from the waste gas inlet to a waste gas flow pipe connecting the VOC adsorption unit and the VOC oxidation unit from the waste gas flow pipe connecting the blower and the VOC adsorption unit; A heat exchanger for heat-exchanging the oxidizing gas discharged to the outside through the oxidizing gas exhaust unit; An oxidizing gas flow pipe guiding the oxidizing gas discharged from the VOC oxidizing unit to the heat exchanger; A heat exchange gas exhaust pipe for discharging the gas heat exchanged by the heat exchanger to the outside; And Volatile organic compound removal system using the adsorption / oxidation bifunctional catalyst comprising a control unit for controlling the blower, heater and heat exchanger. The catalyst of claim 1, wherein the catalyst installed in the VOC adsorption unit and the VOC oxidation unit is used in one carrier selected from the group consisting of ZSM-5, alumina, or titania in which the ratio of SiO ₂ / Al ₂ O ₃ is optimally adjusted. Volatile using adsorption / oxidizing bifunctional catalyst characterized in that it is a catalyst for adsorption / oxidation bifunctional volatile organic compounds incorporating a metal or metal oxide selected from the group consisting of copper, chromium, cobalt, platinum, palladium or oxides thereof. Organic Compound Removal System. The volatile organic compound removal using the adsorption / oxidizing bifunctional catalyst according to claim 2, wherein the temperature condition of adsorption and desorption of the volatile organic compound in the VOC adsorption unit is 300 ° C. at room temperature (50 ° C. or less). system. The volatile organic compound removal system using an adsorption / oxidizing bifunctional catalyst according to claim 3, wherein the temperature condition of oxidation of the volatile organic compound in the VOC oxidation unit is in the range of 250 to 500 ° C. The volatile organic compound removal system using an adsorption / oxidizing bifunctional catalyst according to any one of claims 1 to 4, wherein the waste gas flow pipe connecting the blower and the VOC adsorption unit passes through the heat exchanger. The waste gas flow pipe and the waste gas bypass flow pipe connecting the VOC adsorption unit and the VOC oxidation unit are further provided with a throttle valve for controlling the flow of the industrial waste gas by the control unit. Volatile Organic Compound Removal System Using Oxidative Bifunctional Catalyst. 7. The adsorption / oxidation of claim 6, wherein the waste gas bypass flow pipe is connected to a waste gas flow pipe between the throttle valve installed in the waste gas flow pipe connecting the VOC adsorption unit and the VOC oxidation unit and the VOC oxidation unit. Volatile Organic Compound Removal System Using Functional Catalyst. The throttle valve of claim 7, further comprising a throttle valve configured to control an amount of the oxidized gas discharged to the outside by the control unit and the oxidized gas introduced into the heat exchanger at one position of the oxidizing gas exhaust unit and the oxidizing gas flow pipe. Volatile organic compound removal system using adsorption / oxidation bifunctional catalyst. 9. The volatile organic compound removal system using an adsorption / oxidizing bifunctional catalyst according to claim 8, wherein the oxidizing gas flow pipe is connected between the VOC oxidizing unit and a throttle valve installed in place of the oxidizing gas exhausting unit. A blower for flowing the industrial waste gas introduced through the waste gas inlet; A catalyst for adsorbing volatile organic compounds in industrial waste gas flowd by the blower and a heater for desorbing volatile organic compounds adsorbed on the catalyst by raising the internal temperature when the concentration of the adsorbed volatile organic compounds reaches a certain concentration are respectively installed. When the adsorption of the volatile organic compound is made on one side of the two VOC adsorption unit is made to desorb the volatile organic compound on the other side; A VOC oxidizing unit which introduces the volatile organic compound that is desorbed and flowed from the catalyst of the VOC adsorption unit and oxidizes the volatile organic compound and discharges it to outside air by raising a temperature of a catalyst and a heater installed therein; An oxidizing gas exhaust unit installed at one side of the VOC oxidizing unit to discharge the oxidized gas to outside air; A waste gas flow pipe connecting the blower, the VOC adsorption unit and the VOC oxidation unit to guide industrial waste gas sequentially; A waste gas bypass flow pipe for guiding industrial waste gas introduced from the waste gas inlet to a waste gas flow pipe connecting the VOC adsorption unit and the VOC oxidation unit from the waste gas flow pipe connecting the blower and the VOC adsorption unit; A heat exchanger for heat-exchanging the oxidizing gas discharged to the outside through the oxidizing gas exhaust unit; An oxidizing gas flow pipe guiding the oxidizing gas discharged from the VOC oxidizing unit to the heat exchanger; A heat exchange gas exhaust pipe for discharging the gas heat exchanged by the heat exchanger to the outside; And Volatile organic compound removal system using the adsorption / oxidation bifunctional catalyst comprising a control unit for controlling the blower, heater and heat exchanger. The catalyst of claim 10, wherein the catalyst installed in the VOC adsorption unit and the VOC oxidation unit is used for one carrier selected from the group consisting of ZSM-5, alumina, or titania in which the ratio of SiO ₂ / Al ₂ O ₃ is optimally adjusted. Volatile using adsorption / oxidizing bifunctional catalyst characterized in that it is a catalyst for adsorption / oxidation bifunctional volatile organic compounds incorporating a metal or metal oxide selected from the group consisting of copper, chromium, cobalt, platinum, palladium or oxides thereof. Organic Compound Removal System. The temperature condition of the adsorption and desorption of the volatile organic compound in the VOC adsorption unit is in the range of room temperature (less than 50 ℃) 300 ℃, the temperature of the oxidation of the volatile organic compound in the VOC oxidation unit Volatile organic compound removal system using the adsorption / oxidation bifunctional catalyst, characterized in that the range is 250 ~ 500 ℃. The system for removing volatile organic compounds using the adsorption / oxidizing bifunctional catalyst according to any one of claims 10 to 12, wherein the waste gas flow pipe connecting the blower and the VOC adsorption unit passes through the heat exchanger. 14. The adsorption / oxidation of claim 13, wherein each of the waste gas flow pipe and the waste gas bypass flow pipe connecting the VOC adsorption unit and the VOC oxidation unit is further provided with a throttle valve for controlling the flow of the industrial waste gas by the control unit. Volatile Organic Compound Removal System Using Bifunctional Catalyst. The throttle valve of claim 14, further comprising a throttle valve configured to control an amount of the oxidized gas discharged to the outside by the control unit and the oxidized gas introduced into the heat exchanger at one position of the oxidizing gas exhaust unit and the oxidizing gas flow pipe. Volatile organic compound removal system using adsorption / oxidation bifunctional catalyst. 16. The volatile organic compound removal system using an adsorption / oxidizing bifunctional catalyst according to claim 15, wherein the oxidizing gas flow pipe is connected between the VOC oxidizing unit and a throttle valve installed in place of the oxidizing gas exhaust unit.