Volatile Organic Compound Purification Device

Abstract

A volatile organic compound (VOC) purification device defines a first axial direction and a second axial direction perpendicular to each other. The VOC purification device includes a housing, an inlet pipe, an outlet pipe, at least one heating module, and at least one catalyst module. The housing has two opposite sides along the first axial direction and has an accommodating space inside the housing. The inlet pipe and the outlet pipe respectively pass through the two sides of the housing. The at least one heating module is disposed in the accommodating space of the housing. The at least one catalyst module is disposed in the accommodating space of the housing and is arranged along the first axial direction between the inlet pipe and the outlet pipe, thereby improving the decomposition efficiency of the VOC purification device.

Description

Technical Field

[0001] This invention relates to a pollutant purification device; in particular, it refers to a pollutant purification device. Prior Technology

[0002] It is known that manufacturing industries (such as the semiconductor industry) often need to use large amounts of organic solvents to clean wafers in the process to remove contaminants attached to the wafers. Volatile organic compounds (VOCs) generated during the cleaning process are easily volatilized and dispersed into the environment, causing environmental pollution and even harming human health. Therefore, volatile organic compounds have become one of the important regulated pollutants.

[0003] To avoid environmental pollution or human discomfort caused by the direct emission of volatile organic compounds (VOCs), VOC purification devices are usually installed in the cleaning process to decompose the VOCs in the exhaust gas emitted from the process and achieve purification. In addition, since manufacturing industries are usually large-scale production, the amount of exhaust gas generated in the process increases significantly, making it impossible for VOC purification devices to cope with such a large amount of exhaust gas within a certain period of time, resulting in a decrease in the overall working efficiency of the VOC purification devices.

[0004] Therefore, existing volatile organic compound (VOC) purification devices still have room for improvement. How to improve the efficiency of VOC decomposition is a key technical issue that related industries are currently focusing on. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a volatile organic compound purification device that improves the efficiency of decomposing volatile organic compounds by heating and decomposing waste gas.

[0006] To achieve the above objectives, the present invention provides a volatile organic compound (VOC) purification device, defining a first axial direction and a second axial direction, the first axial direction being perpendicular to the second axial direction. The VOC purification device includes a housing, an inlet pipe and an outlet pipe, at least one heating module and at least one catalyst module. The housing has opposite sides along the first axial direction, and the housing has an accommodating space inside. The inlet pipe and the outlet pipe respectively pass through the two sides of the housing. The at least one heating module is disposed within the housing. In the accommodating space, the at least one heating module includes a plurality of heating units, and the heating units of the at least one heating module are arranged along the second axial direction; the at least one catalyst module is disposed in the accommodating space of the housing and is arranged with the at least one heating module along the first axial direction between the air inlet pipe and the air outlet pipe, and the at least one catalyst module is adjacent to the at least one heating module in the first axial direction, the at least one catalyst module includes a plurality of catalyst units, and the catalyst units of the at least one catalyst module are arranged along the second axial direction.

[0007] The effect of the present invention is that by sequentially arranging the air inlet pipe, the at least one heating module and the at least one catalyst module, and the air outlet pipe along the first axial direction, the heating and catalytic decomposition reaction is achieved, thereby improving the decomposition efficiency of the volatile organic compound purification device. Simple Explanation of the Diagram

[0008] Figure 1 is a perspective view of a volatile organic compound purification device according to a preferred embodiment of the present invention. Figure 2 is a perspective view of a volatile organic compound purification device according to a preferred embodiment of the present invention, showing the device excluding the outer casing. Figure 3 is a top view of the volatile organic compound purification device of the above-described preferred embodiment of the present invention. Figure 4 is a cross-sectional view along direction 4-4 of Figure 3. Figure 5 is an enlarged view of the area marked A1 in Figure 4. Figure 6 is an enlarged view of the area marked A2 in Figure 4. Figure 7 is a schematic diagram of the volatile organic compound purification device of the above-described preferred embodiment of the present invention. Figure 8 is a schematic diagram of the heating module and catalyst module of the preferred embodiment of the present invention. Figure 9 is a schematic diagram from another perspective of the heating module and catalyst module of the preferred embodiment of the present invention described above. Figure 10 is a schematic diagram of the heating module of the preferred embodiment of the present invention. Figure 11 is a schematic diagram of the heating unit of the preferred embodiment of the present invention described above. Figure 12 is an exploded view of the heating unit of the preferred embodiment of the present invention described above. Figure 13 is an enlarged view of the area marked A3 in Figure 12. Figure 14 is an exploded view of the catalyst module of the preferred embodiment of the present invention described above. Figure 15 is a cross-sectional view along direction 15-15 of Figure 8. Figure 16 is a schematic diagram of the catalyst unit of the preferred embodiment of the present invention described above. Figure 17 is an exploded view of the catalyst unit of the preferred embodiment of the present invention described above. Implementation

[0009] To more clearly illustrate the present invention, preferred embodiments are described in detail below with reference to the accompanying drawings. Referring to Figures 1 to 3, a preferred embodiment of the volatile organic compound (VOC) purification device 100 of the present invention is shown. This VOC purification device 100 is used to filter a gas containing VOCs (not shown). The VOC purification device 100 defines a first axis L1, a second axis L2, and a third axis L3 that are perpendicular to each other. The VOC purification device 100 includes an outer casing 10, a housing 20, an inlet pipe 30, an outlet pipe 40, at least one heating module 50, at least one catalyst module 60, a first gas collection hood 70, and a second gas collection hood 80.

[0010] The outer casing 10 includes a casing 12 and two side covers 14. The two side covers 14 are disposed opposite to the casing 12 along the third axis L3 and can be flipped relative to the casing 12. The housing 20 is disposed in the casing 12 and has opposite sides along the first axis L1. The housing 20 has an accommodating space 22 inside. The air inlet pipe 30 and the air outlet pipe 40 respectively pass through the two sides of the casing 12 along the first axis L1 and the two sides of the housing 20. The air inlet pipe 30 is used to supply the gas input, and the air outlet pipe 40 is used to supply the gas after the volatile organic compounds have been filtered out.

[0011] As shown in Figures 4 and 7 to 13, at least one heating module 50 is disposed in the accommodating space 22 of the housing 20 along the first axial direction L1. The at least one heating module 50 includes a first frame 52, a plurality of heating units 54 and two first side plates 56. In this embodiment, the number of heating modules 50 is two, but it is not limited thereto. In other embodiments, the number of heating modules 50 can be increased to three or more as needed. Since the two heating modules 50 have the same structure, the following description uses one heating module 50 as an example.

[0012] The first frame 52 includes two first docking plates 522, which are opposite each other along the first axial direction L1. Each first docking plate 522 has a first opening 522a and a plurality of first flanges 522b. The two first openings 522a of the first frame 52 are opposite each other along the first axial direction L1, so that the gas can pass through each first opening 522a from the air inlet pipe 30. The first flanges 522b of each first docking plate 522 are arranged along the edge of the first opening 522a of each first docking plate 522.

[0013] The heating units 54 of the heating module 50 are disposed in the first frame 52 of the heating module 50. The heating units 54 of the heating module 50 are arranged along the second axis L2. Each heating unit 54 includes two protective plates 542, two connecting frames 544, a heater 546 and a fixing frame 548. The two protective plates 542 are opposite to each other along the second axis L2, and the two connecting frames 544 are opposite to each other along the third axis L3 and connected to the two protective plates 542. The heater 546 is disposed between the two protective plates 542 and the two connecting frames 544. Thus, when the gas passes through the two first openings 522a of each heating module 50, the heater 546 can heat the gas. In this embodiment, the heater 546 is a heating lamp tube and includes a quartz outer tube 546a and a filament (not shown) located in the quartz outer tube 546a, but it is not limited thereto. The heater 546 extends along the third axis L3 and includes two connecting terminals 546b, which connect to both ends of the filament. The two connecting terminals 546b are opposite each other along the third axis L3 and pass through the two connecting frames 544 respectively. Each of the two connecting terminals 546b is electrically connected to a wire (not shown) to connect to a power source (not shown), which supplies power to the heater 546. Two fixing brackets 548 are disposed between the two protective plates 542 and the two connecting frames 544. Each fixing bracket 548 includes two clamping plates 548a and two buffer pads 548b. The clamping plates 548a of each heating unit 54... The heaters 546 of each heating unit 54 are clamped along the second axial direction L2. Each buffer pad 548b is disposed between each clamping plate 548a and the heater 546. In this embodiment, the material of each buffer pad 548b is ceramic fiber cotton, but it is not limited to this. In this way, the two clamping plates 548a of each heating unit 54 are prevented from directly contacting the heater 546, so that the heaters 546 are not easily vibrated, thereby extending the service life of the heaters 546.

[0014] In this embodiment, the heating units 54 of each heating module 50 are stacked in the first frame 52, and each protective plate 542 of each heating unit 54 contacts a protective plate 542 of an adjacent heating unit 54 along the second axial direction L2. However, this is not a limitation. In other embodiments, each protective plate 542 of each heating unit 54 and a protective plate 542 of an adjacent heating unit 54 may be spaced apart.

[0015] The two first side plates 56 are opposite each other along the third axis L3, and the heating units 54 are located between the two first side plates 56. The first side plates 56 of each heating module 50 are detachably connected to the first frame 52. After one of the first side plates 56 is detached, the heating units 54 can be moved out of the accommodating space 22 along the third axis L3. For example, when the heating units 54 of one of the heating modules 50 are damaged and need to be replaced, the first side plate 56 of the damaged heating module 50 is detached first, and then the damaged heating module 54 can be moved out. The heating units 54 of the 0 are removed and replaced from the accommodating space 22 along the third axis L3 without having to move all of the at least one heating module 50 at the same time, thereby improving the operational convenience of the volatile organic compound purification device 100; each of the first side plates 56 includes a plurality of through holes 561, the through holes 561 of each heating module 50 are arranged along the second axis L2 and correspond to the heaters 546 of each heating module 50, and each of the connecting terminals 546b of each heating module 50 passes through the corresponding through holes 561 to electrically connect the wires.

[0016] As shown in Figures 4 to 9 and Figures 14 to 17, the at least one catalyst module 60 is disposed in the accommodating space 22 of the housing 20 and arranged with the at least one heating module 50 along the first axial direction L1 between the air inlet pipe 30 and the air outlet pipe 40. The at least one catalyst module 60 and the at least one heating module 50 are adjacent to each other along the first axial direction L1. In this embodiment, the at least one catalyst module 60 and the at least one heating module 50 are arranged alternately along the first axial direction L1 between the air inlet pipe 30 and the air outlet pipe 40, but this is not a limitation. The at least one catalyst module 60 includes a second frame 61, a plurality of catalyst units 62, two second side plates 63, two heat insulation materials 64, two pressure plates 65, and a catalyst end plate 66. 6. In this embodiment, the number of at least one catalyst module 60 is two, but it is not limited thereto. In other embodiments, the number of catalyst modules 60 can be increased to three or more as needed, as long as the number of at least one catalyst module 60 corresponds to the number of at least one heating module 50. Since the structure of each catalyst module 60 is the same, the following description uses one catalyst module 60 as an example. In this way, the gas can pass through one heating module 50, one catalyst module 60, another heating module 50, and another catalyst module 60 in sequence, so as to improve the decomposition efficiency of the volatile organic compound purification device 100 by heating and catalytic decomposition reaction through the two heating modules 50 and the two catalyst modules 60.

[0017] The second frame 61 includes two second mating plates 612, which are opposite each other along the first axial direction L1. Each second mating plate 612 has a second opening 612a and a plurality of second flanges 612b. The two second openings 612a of each second frame 61 are opposite each other along the first axial direction L1. Each first opening 522a of the first mating plate 522 corresponds to the second opening 612a of the adjacent second mating plate 612. The second flanges 612b of each second mating plate 612 are arranged along the edge of the second opening 612a of each second mating plate 612. The module 50 abuts against the second flanges 612b of the second docking plate 612 of the adjacent catalyst module 60 by the first flanges 522b of the first docking plate 522, so as to avoid the formation of seams between each first opening 522a and the adjacent second opening 612a. In this way, when the gas passes through the first opening 522a of each heating module 50 and enters the adjacent second opening 612a, the gas can be concentrated through the first opening 522a and enter the adjacent second opening 612a, thereby improving the decomposition efficiency of the volatile organic compound purification device 100.

[0018] The catalyst units 62 are arranged along the second axis L2 and disposed in the second frame 61 of each catalyst module 60. Each catalyst unit 62 includes an inner frame 622, a plurality of catalyst blocks 624 and a buffer assembly 626. The inner frame 622 includes two first inner plates 622a and two second inner plates 622b. The two first inner plates 622a are opposite each other along the third axis L3, and the two second inner plates 622b are connected to the two first inner plates 622a. Furthermore, along the second axial direction L2, the catalyst blocks 624 of each catalyst unit 62 are arranged along the third axial direction L3 and disposed in each inner frame 622. Each catalyst block 624 has two venting surfaces 624a and a plurality of peripheral surfaces 624b. The two venting surfaces 624a are opposite each other along the first axial direction L1, and each catalyst block 624 forms a plurality of venting holes between the two venting surfaces 624a. These venting holes extend along the first axial direction L1. In this embodiment, each catalyst block 624 includes a ceramic block and a catalyst material. The catalyst material is plated on the surface of the ceramic block, for example, on the surface of each venting surface 624a, each peripheral surface 624b, and each venting hole. The catalyst material can decompose volatile organic compounds in the gas at a reaction temperature (e.g., 300°C). In addition to heating the gas, the heaters 546 can also heat the adjacent catalyst block 624 to the reaction temperature. In this embodiment, the catalyst material can be, for example, platinum or palladium, but is not limited thereto.

[0019] After the gas passes through a second opening 612a of the catalyst module 60, it first passes through the two venting surfaces 624a of each catalyst block 624, and then through another second opening 612a of the catalyst module 60. Two peripheral surfaces 624b face each other along the second axial direction L2, and another two peripheral surfaces 624b face each other along the third axial direction L3. A buffer assembly 626 is disposed in the inner frame 622 and surrounds the peripheral surfaces 624b of each catalyst block 624. The buffer assembly 626 includes a plurality of first buffer members 626a and two second buffer members 626b. The first buffers 626a and the catalyst blocks 624 are arranged alternately along the third axis L3, and the two second buffers 626b are opposite each other along the second axis L2. Each second buffer 626b is located between the peripheral surface 624b of the adjacent catalyst blocks 624 and the adjacent second inner plate 622b. In this embodiment, the material of the buffer assembly 626 is ceramic fiber cotton, but it is not limited to this. In this way, the inner frame 622 is prevented from directly contacting the catalyst blocks 624, so that the catalyst blocks 624 are not easily vibrated and the service life of the catalyst blocks 624 is extended.

[0020] In this embodiment, the catalyst units 62 of each catalyst module 60 are stacked in the second frame 61, and each second inner plate 622b of each catalyst unit 62 contacts a second inner plate 622b of an adjacent catalyst unit 62 along the second axial direction L2. However, this is not a limitation. In other embodiments, each second inner plate 622b of each catalyst unit 62 and a second inner plate 622b of an adjacent catalyst unit 62 may be spaced apart.

[0021] The two second side plates 63 are opposite each other along the third axis L3. The catalyst units 62 are located between the two second side plates 63. The second side plates 63 of each catalyst module 60 are detachably connected to the second frame 61. Each heat insulation material 64 and each pressure plate 65 are disposed between the catalyst units 62 and each second side plate 63, and each pressure plate 65 is located between each heat insulation material 64 and each second side plate 63. Each second side plate 63 presses against each heat insulation material 64 through each pressure plate 65 to achieve a better sealing effect, so that when the gas passes through each catalyst module 60, it will not leak out from the gap at the connection between the two second side plates 63 and the second frame 61. The catalyst end plate 66 is disposed on one of the heat insulation materials 63 of the catalyst module 60. 4. The catalyst units 62 are aligned with each other; for example, when the catalyst units 62 of a catalyst module 60 are damaged and need to be replaced, after removing the second side plate 63, the pressure plate 65 and the heat insulation material 64 in sequence, or after removing the other second side plate 63, the other pressure plate 65, the other heat insulation material 64 and the catalyst end plate 66 in sequence, the damaged catalyst units 62 of the catalyst module 60 can be extracted and replaced along the third axis L3 from the receiving space 22 without moving all of the at least one catalyst module 60 at the same time, or even moving the at least one heating module 50, so as to improve the operational convenience of the volatile organic compound purification device 100.

[0022] As shown in Figures 4 to 6, the first gas collecting hood 70 and the second gas collecting hood 80 are disposed in the accommodating space 22 of the housing 20 and are opposite each other along the first axial direction L1. The first gas collecting hood 70 is recessed towards the air inlet pipe 30 and has an air inlet 71, and the second gas collecting hood 80 is recessed towards the air outlet pipe 40 and has an air outlet 81. The air inlet pipe 30 is connected to the air inlet 71, and the air outlet pipe 40 is connected to the air outlet 81. The first gas collecting hood 70 is adjacent to a heating module 50, and the first gas collecting hood 70 abuts against the first flanges 522b of the first mating plate 522 of the adjacent heating module 50 to avoid forming a seam between the first gas collecting hood 70 and the adjacent first opening 522a. The second gas collecting hood 80 is adjacent to a catalyst module 60, and the second gas collecting hood 80 is recessed towards the ... The second flanges 612b of the second mating plate 612 of the adjacent catalyst module 60 abut against the second gas collecting hood 80 to avoid forming a seam between the second gas collecting hood 80 and the adjacent second opening 612a. In this way, when the gas enters sequentially from the air inlet pipe 30 and the air inlet 71, the gas can be confined within the area corresponding to the first opening 522a through the recessed structure of the first gas collecting hood 70 toward the air inlet pipe 30, thereby allowing the gas to concentrate through the adjacent first opening 522a. Then, through the recessed structure of the second gas collecting hood 80 toward the air outlet pipe 40, the gas can be confined within the area corresponding to the second opening 612a, thereby allowing the gas to concentrate and reach the air outlet 81, thereby improving the decomposition efficiency of the volatile organic compound purification device 100.

[0023] In summary, in this embodiment, the volatile organic compound purification device 100 of the present invention, through the two heating modules 50 and the two catalyst modules 60 arranged alternately along the first axial direction L1, allows the gas to pass sequentially along the first axial direction L1 through the inlet pipe 30, the inlet 71, one heating module 50, one catalyst module 60, another heating module 50, another catalyst module 60, the outlet 81, and the outlet pipe 40, where it is heated and catalytically decomposed by the two heating modules 50 and the two catalyst modules 60. Furthermore, through the arrangement of the first gas collection hood 70 and the second gas collection hood 80, the volatile organic compound purification device 100 of the present invention... The gas can be confined within the area corresponding to the first opening 522a and the second opening 612a, thereby allowing the gas to be concentrated through the adjacent first opening 522a and concentrated to the outlet 81. In conjunction with the arrangement of the first flanges 522b and the second flanges 612b, the gas can be concentrated between the first gas collecting hood 70 and the adjacent first opening 522a, between the first opening 522a and the adjacent second opening 612a, and between the second gas collecting hood 80 and the adjacent second opening 612a, so as to improve the decomposition efficiency of the volatile organic compound purification device 100.

[0024] The above description is only a preferred embodiment of the present invention. Any equivalent changes made by applying the present invention specification and the claims should be included within the patent scope of the present invention.

[0025] 100: Volatile Organic Compound Purification Device 10:Outer box 12: Box 14: Side Cover 20: Shell 22: Storage space 30: Intake pipe 40: Exhaust pipe 50: Heating Module 52: First Framework 522: First docking plate 522a: First opening 522b: The First Fold 54: Heating Unit 542: Protective Plate 544: Connector Frame 546: Heater 546a: Quartz outer tube 546b: Connecting terminal 548: Fixture 548a: Plywood 548b: Cushioning pad 56: First side plate 561: Perforation 60: Catalyst Module 61: Second Frame 612: Second docking plate 612a: Second opening 612b: Second Fold 62: Catalyst Unit 622: Inner frame 622a: First Inner Plate 622b: Second Inner Plate 624: Catalyst Block 624a: Ventilation surface 624b: Peripheral 626: Buffer Component 626a: First buffer 626b: Second buffer 63: Second side panel 64: Thermal insulation materials 65: Pressure plate 66:Catalyst end plate 70: First Gas Shield 71: Air Inlet 80: Second Gas Shield 81: Air vent L1: First Axial Direction L2: Second Axial Direction L3: Third Axis

Claims

1. A volatile organic compound purification device, defining a first axis and a second axis, the first axis being perpendicular to the second axis, the volatile organic compound purification device comprising: A housing having opposite sides along the first axis, and an accommodating space inside the housing; An air inlet pipe and an air outlet pipe, wherein the air inlet pipe and the air outlet pipe respectively pass through the two sides of the housing; at least one heating module is disposed in the accommodating space of the housing, the at least one heating module includes a plurality of heating units, the heating units of the at least one heating module are arranged along the second axial direction; at least one catalyst module is disposed in the accommodating space of the housing and is arranged along the first axial direction between the air inlet pipe and the air outlet pipe, and the at least one catalyst module and the at least one heating module are adjacent to each other along the first axial direction, the at least one catalyst module includes a plurality of catalyst units, the catalyst units of the at least one catalyst module are arranged along the second axial direction, wherein the at least one heating module includes two heating modules, the at least one catalyst module includes two heating modules, the two catalyst modules and the two heating modules are arranged alternately along the first axial direction between the air inlet pipe and the air outlet pipe.

2. The volatile organic compound purification device as claimed in claim 1, wherein a third axis is defined, the third axis being perpendicular to the first axis and the second axis; an outer casing comprising a housing and two side covers, the housing being disposed in the housing, the inlet pipe and the outlet pipe passing through the housing on both sides along the first axis, and the two side covers being disposed opposite to each other on the housing along the third axis.

3. A volatile organic compound purification device, defining a first axis and a second axis, the first axis being perpendicular to the second axis, the volatile organic compound purification device comprising: A housing having opposite sides along the first axis, and an accommodating space inside the housing; An air inlet pipe and an air outlet pipe are respectively disposed on both sides of the housing; at least one heating module is disposed in the accommodating space of the housing, the at least one heating module includes a plurality of heating units, the heating units of the at least one heating module are arranged along the second axial direction; at least one catalyst module is disposed in the accommodating space of the housing and is arranged with the at least one heating module along the first axial direction between the air inlet pipe and the air outlet pipe, and the at least one catalyst module is adjacent to the at least one heating module along the first axial direction, the at least one catalyst module includes a plurality of catalyst units, the catalyst units of the at least one catalyst module are arranged along the second axial direction, wherein the at least one heating module includes a first frame, the heating units of the at least one heating module are disposed in the first frame of the at least one heating module, the at least one first frame includes two first mating plates, the at least two first mating plates are opposite each other along the first axial direction, and each first mating plate has a first The at least one first frame has at least two first openings facing each other along the first axial direction; the at least one catalyst module includes a second frame, the catalyst units of the at least one catalyst module are disposed in the second frame of the at least one catalyst module, the at least one second frame includes two second mating plates, the at least two second mating plates facing each other along the first axial direction, each of the second mating plates has a second opening, and the two second openings of the at least one second frame are facing each other along the first axial direction; wherein, the at least one heating module abuts against the second mating plate of an adjacent catalyst module by means of one of the first mating plates, and the first opening of the first mating plate corresponds to the second opening of the adjacent second mating plate.

4. The volatile organic compound purification device as claimed in claim 3, wherein each of the first docking plates has a plurality of first flanges, the first flanges of each of the first docking plates being arranged along the edge of a first opening of each of the first docking plates; each of the second docking plates has a plurality of second flanges, the second flanges of each of the second docking plates being arranged along the edge of a second opening of each of the second docking plates; wherein, The at least one heating module abuts against the second flanges of the second mating plate of the adjacent catalyst module via the first flanges of the first mating plate.

5. The volatile organic compound purification device as described in claim 3, wherein the heating units of the at least one heating module are arranged in a stacked manner in the first frame.

6. The volatile organic compound purification device as claimed in claim 3, wherein a third axis is defined, the third axis being perpendicular to the first axis and the second axis; each of the heating units includes two guard plates and a heater, the two guard plates being opposite each other along the second axis, the heater being disposed between the two guard plates, and the heater including two connecting terminals being opposite each other along the third axis.

7. The volatile organic compound purification device as claimed in claim 6, wherein each heating unit includes two fixing frames disposed between the two protective plates, each fixing frame includes two clamping plates, and the two clamping plates of each heating unit clamp the heater of each heating unit.

8. The volatile organic compound purification device as claimed in claim 6, wherein the at least one heating module includes two first side plates facing each other along the third axis, the heating units are located between the two first side plates, the first side plates of the at least one heating module are detachably connected to the first frame, wherein after one of the first side plates is detached, the heating units can be moved out of the receiving space along the third axis; each of the first side plates includes a plurality of through holes, each of the through holes of the at least one heating module is arranged along the second axis and corresponds to each of the heaters of the at least one heating module, and each of the connection terminals of the at least one heating module passes through the corresponding through holes.

9. The volatile organic compound purification device as claimed in claim 3, wherein the catalyst units of the at least one catalyst module are arranged in a stacked manner in the second frame.

10. The volatile organic compound purification device as claimed in claim 3, wherein a third axis is defined, the third axis being perpendicular to the first axis and the second axis; each catalyst unit includes an inner frame, a plurality of catalyst blocks and a buffer assembly, the catalyst blocks being disposed in the inner frame, each catalyst block having two venting surfaces and a plurality of peripheral surfaces, the two venting surfaces being opposite to each other along the first axis; the buffer assembly surrounding the peripheral surfaces of each catalyst block.

11. The volatile organic compound purification device as claimed in claim 10, wherein the at least one catalyst module includes two second side plates opposite each other along the third axis, and the catalyst units are located between the two second side plates; the second side plates of the at least one catalyst module are detachably connected to the second frame, and after the second side plates are detached, the catalyst units can be moved out of the receiving space along the third axis.

12. The volatile organic compound purification device as claimed in claim 11, wherein the at least one catalyst module includes two insulating materials, each of the insulating materials being located between the catalyst units and each of the second side plates.

13. The volatile organic compound purification device as claimed in claim 12, wherein the at least one catalyst module includes two pressure plates, each pressure plate being located between each of the thermal insulation materials and each of the second side plates, each of the second side plates pressing against each of the thermal insulation materials through the pressure plates.

14. The volatile organic compound purification device as claimed in claim 4, comprising a first gas collecting hood and a second gas collecting hood, wherein the first gas collecting hood and the second gas collecting hood are disposed in the receiving space of the housing and are opposite to each other along the first axial direction; the first gas collecting hood is recessed toward the inlet pipe and has an air inlet; the second gas collecting hood is recessed toward the outlet pipe and has an air outlet; the inlet pipe communicates with the air inlet; and the outlet pipe communicates with the air outlet; the first gas collecting hood is adjacent to a heating module and abuts against the first flanges of the first mating plate of the adjacent heating module; the second gas collecting hood is adjacent to a catalyst module and abuts against the second flanges of the second mating plate of the adjacent catalyst module.

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