CN113209920A

CN113209920A - Microwave coupling catalytic reactor and VOCs treatment facility

Info

Publication number: CN113209920A
Application number: CN202010451646.7A
Authority: CN
Inventors: 单晓雯; 尹树孟; 于辉; 程龙军; 黄兆贺; 宫中昊; 张健中
Original assignee: China Petroleum and Chemical Corp; Sinopec Qingdao Safety Engineering Institute
Current assignee: China Petroleum and Chemical Corp; Sinopec Safety Engineering Research Institute Co Ltd
Priority date: 2020-01-21
Filing date: 2020-05-25
Publication date: 2021-08-06
Anticipated expiration: 2040-05-25
Also published as: CN113209920B

Abstract

The invention relates to the technical field of VOCs treatment, and discloses a microwave coupling catalytic reactor and VOCs treatment equipment. The microwave coupling catalytic reactor comprises a shell (10) with a reaction channel inside, wherein the reaction channel is in a snake shape and consists of a plurality of straight sections (11) and a plurality of turning sections (12), the reaction channel is filled with a catalyst (13) for catalyzing oxidation of VOCs, each turning section (12) is correspondingly provided with a microwave generator (14), and the microwave generators (14) are used for radiating microwaves to the catalyst (13). The microwave coupling catalytic reactor disclosed by the invention can realize the integral uniform heating of the catalyst, ensures that all the catalyst in the reaction channel reaches the optimal reaction state, can effectively improve the heating speed and the reaction efficiency, reduces the energy consumption, avoids the waste of the catalyst, has the advantages of high efficiency, safety, energy conservation and the like, and is suitable for industrial application.

Description

Microwave coupling catalytic reactor and VOCs treatment facility

Technical Field

The invention relates to the technical field of VOCs treatment, in particular to a microwave coupling catalytic reactor and VOCs treatment equipment.

Background

In the field of VOCs (volatile organic compounds) treatment, an electric heater or a heating furnace is generally adopted to heat waste gas containing VOCs, and then a catalyst is heated to a reaction temperature layer by layer from bottom to top or from top to bottom by high-temperature waste gas in a heat conduction mode. The heating mode has the problems of long heating time, high energy consumption, uneven heating, incapability of enabling all catalysts to reach an optimal reaction state, easy catalyst waste, low reaction efficiency and the like.

Disclosure of Invention

The invention aims to provide a microwave coupling catalytic reactor and VOCs treatment equipment to solve the problems.

In order to achieve the above object, in one aspect, the present invention provides a microwave-coupled catalytic reactor, which includes a housing having a reaction channel therein, wherein the reaction channel is a serpentine shape formed by a plurality of straight sections and a plurality of turning sections, the reaction channel is filled with a catalyst for catalyzing oxidation of VOCs, and each turning section is correspondingly provided with a microwave generator for radiating microwaves to the catalyst.

Optionally, the casing is provided with an air inlet communicated with one end of the reaction channel and an air outlet communicated with the other end of the reaction channel, the air inlet is used for allowing a gas to be treated containing VOCs to enter the reaction channel, and the air outlet is used for discharging purified gas generated in the reaction channel out of the reaction channel.

Optionally, the housing is made of a non-wave-transparent material, and the air inlet and the air outlet are respectively provided with a microwave shielding net.

Optionally, the reaction channel is provided to extend in a longitudinal direction of the casing, and/or the catalyst is filled in the straight section.

Optionally, the length of the catalyst in the extending direction of the straight section is twice the maximum microwave skin depth of the catalyst.

Optionally, the microwave-coupled catalytic reactor comprises a baffle assembly for defining the reaction channel, the baffle assembly comprises a plurality of horizontal baffles, the plurality of horizontal baffles are arranged at intervals along the longitudinal direction of the shell, the straight section is defined between two adjacent horizontal baffles, two adjacent horizontal baffles are staggered with each other in the longitudinal direction of the shell, two spaced horizontal baffles are aligned with each other in the longitudinal direction of the shell, and the turning section is formed between the inner wall of the shell and the proximal end of the horizontal baffle located between two spaced horizontal baffles.

Optionally, the baffle assembly comprises a plurality of vertical baffles connected between two spaced apart horizontal baffles, the vertical baffles forming the turning section with the proximal ends of the horizontal baffles located between the two spaced apart horizontal baffles.

Optionally, the vertical partition plate and the inner wall of the housing have an interval in the transverse direction of the housing, the interval is formed as a wave-transparent isolation region, the microwave generator is located outside the housing and is arranged corresponding to the wave-transparent isolation region, and a communication port communicated with a microwave break port of the microwave generator is opened on a portion of the housing for defining the wave-transparent isolation region.

Optionally, the communication port is located in the middle of the wave-transparent isolation region in the longitudinal direction.

Optionally, the horizontal partition is made of a non-wave-transparent material, and the vertical partition is made of a wave-transparent material.

In another aspect, the present invention provides a device for treating VOCs, which comprises the above microwave-coupled catalytic reactor.

Optionally, the VOCs processing apparatus includes a first temperature monitor for monitoring the temperature of the catalyst and a second temperature monitor for monitoring the temperature of the gas to be processed that is to enter the reaction channel.

Optionally, the VOCs processing apparatus comprises a controller electrically connected to the first temperature monitor, the second temperature monitor and the microwave generator, respectively, the controller being configured to control operation of the microwave generator in dependence on the temperatures monitored by the first and second temperature monitors.

According to the microwave coupling catalytic reactor, the reaction channel is formed into the shape of the snake, the microwave generators are correspondingly arranged at each turning section of the snake-shaped reaction channel respectively, and the catalysts in the reaction channel are heated by the aid of the microwave generators in a partitioning manner, so that the catalyst can be uniformly heated integrally, all the catalysts in the reaction channel can be ensured to reach the optimal reaction state, the heating speed and the reaction efficiency can be effectively improved, the energy consumption is reduced, the waste of the catalysts is avoided, and the microwave coupling catalytic reactor has the advantages of high efficiency, safety, energy conservation and the like, and is suitable for industrial application.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural diagram of one embodiment of a microwave-coupled catalytic reactor of the present invention;

fig. 2 is a top view of fig. 1.

Description of the reference numerals

10-shell, 11-straight section, 12-turning section, 13-catalyst, 14-microwave generator, 15-air inlet, 16-air outlet, 17-microwave shielding net, 18-horizontal partition board, 19-vertical partition board and 20-wave-transparent isolation area.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of directional terms such as "upper, lower, left, right, top, bottom" without a contrary intention generally refers to the orientation shown in FIG. 1. "inner and outer" refer to the inner and outer contours of the respective component itself.

The invention provides a microwave coupling catalytic reactor, which comprises a shell 10, wherein a reaction channel is arranged in the shell, the reaction channel is in a snake shape formed by a plurality of straight sections 11 and a plurality of turning sections 12, a catalyst 13 for catalyzing oxidation of VOCs is filled in the reaction channel, each turning section 12 is correspondingly provided with a microwave generator 14, and the microwave generator 14 is used for radiating microwaves to the catalyst 13.

In the above, it should be noted that the reaction channel is used for converting the VOCs and the catalyst 13 into carbon dioxide and water vapor through catalytic oxidation reaction, and releasing heat. By adopting the double coupling effect of the microwave and the catalyst 13, VOCs are treated by utilizing the heat effect and the non-heat effect of the microwave, the heat effect of the microwave has the characteristics of rapid heating and selective heating, active elements on the surface of the catalyst can be rapidly in a high-temperature state to form high-temperature point positions, the heating only takes a few minutes, and thus the heating time of the catalyst is greatly shortened; the non-thermal effect of the microwave causes the microwave electric field to cause the electric dipole in the compound to rapidly rotate, the process is regarded as molecular stirring, and the molecular stirring enables the medium to transfer the absorbed microwave energy to the catalyst crystal lattice, so that the release and transfer rate of the catalyst crystal lattice oxygen is accelerated, and the reaction efficiency of the catalyst is remarkably improved.

According to the microwave coupling catalytic reactor, the reaction channel is formed into the shape of the snake, the microwave generators 14 are correspondingly arranged on each turning section 12 of the snake-shaped reaction channel respectively, and the catalysts 13 in the reaction channel are heated by the aid of the microwave generators 14 in a partitioning mode, so that the catalysts 13 can be uniformly heated integrally, all the catalysts 13 in the reaction channel are guaranteed to reach the optimal reaction state, the heating speed and the reaction efficiency can be effectively improved, energy consumption is reduced, waste of the catalysts 13 is avoided, and the microwave coupling catalytic reactor has the advantages of high efficiency, safety, energy conservation and the like, and is suitable for industrial application.

In the present invention, as shown in fig. 1 and fig. 2, a casing 10 is provided with an air inlet 15 communicated with one end of the reaction channel and an air outlet 16 communicated with the other end of the reaction channel, the air inlet 15 is used for allowing a gas to be processed containing VOCs to enter the reaction channel, and the air outlet 16 is used for discharging a purified gas generated in the reaction channel outside the reaction channel.

During reaction, gas to be treated enters the reaction channel through the gas inlet 15 and flows from one end to the other end along the length direction of the reaction channel, and in the flowing process, VOCs in the gas to be treated react under the catalysis of the catalyst 13 to generate carbon dioxide and water vapor and release heat; the purge gas (including carbon dioxide, water vapor, and other gases except VOCs in the gas to be treated) generated in the reaction channel is discharged out of the reaction channel through the gas outlet 16.

In the present invention, in order to prevent the microwave in the housing 10 from leaking, the housing 10 is made of a non-wave-transparent material, and the air inlet 15 and the air outlet 16 are respectively provided with a microwave shielding net 17. In addition, to ensure reactor safety, the overall design pressure of the shell 10 is greater than the maximum chemical explosive force of the VOCs. The catalyst 13 can be a honeycomb or granular high-efficiency wave-absorbing catalyst, and the filling of catalysts with different heights and different sectional areas is realized.

In the present invention, the housing 10 may have any suitable shape, such as a square, a cylinder, etc. The reaction channel may extend in any direction within the housing 10. According to one embodiment of the present invention, as shown in fig. 1, the reaction channel is provided to extend in the longitudinal direction of the casing 10 (see the vertical direction shown in fig. 1). In this case, as shown in fig. 1, the air inlet 15 may be located at a lower portion of the housing 10 and the air outlet 16 may be located at an upper portion of the housing 10. Wherein the gas inlet 15 and the gas outlet 16 may be located on the same side or different sides of the housing 10, depending on the number of turns of the reaction channel in the housing 10.

In the present invention, as shown in fig. 1, the catalyst 13 may be filled in the straight section 11. That is, the turn section 14 is not filled with the catalyst 13. Because the microwave generator 14 is disposed at the turning section 12, the left and right sides of the catalyst 13 in each straight section 11 are respectively opposite to the microwave generator 14, and the microwave emitted from the microwave generator 14 can effectively penetrate the catalyst 13 at the corresponding position, so that the catalyst 13 can rapidly reach a high surface temperature.

Here, in order to further improve the uniformity of heating of the catalyst 13, the length of the catalyst 13 in the extending direction of the straight section 11 is twice the maximum skin depth (i.e., penetration depth) of the microwaves of the catalyst 13. For example, as shown in fig. 1, the length of the catalyst 13 in the horizontal direction is equal to the length of the straight section 11, and the microwaves emitted by the two microwave generators 14 located at both sides of the straight section 11 can penetrate through half of the length of the whole catalyst 13 in the straight section 11, so as to uniformly heat the whole catalyst 13. In addition, the length values of the catalyst 13 in two dimensions perpendicular to the vertical direction can be set reasonably according to the flow velocity of the gas flow, and the cross-sectional shape can be rectangular, square or circular.

In the present invention, the microwave-coupled catalytic reactor may include a partition assembly for defining the reaction channel, the partition assembly may include a plurality of horizontal partitions 18, the plurality of horizontal partitions 18 are spaced apart from each other in the longitudinal direction of the housing 10, the straight section 11 is defined between two adjacent horizontal partitions 18, the two adjacent horizontal partitions 18 are offset from each other in the longitudinal direction of the housing 10, the two spaced apart horizontal partitions 18 are aligned with each other in the longitudinal direction of the housing 10, and the inflection section 12 is formed between the inner wall of the housing 10 and the proximal end of the horizontal partition 18 located between the two spaced apart horizontal partitions 18.

In the above description, it should be noted that the two horizontal partition plates 18 are offset from each other in the longitudinal direction of the housing 10, which means that the two ends of the two horizontal partition plates 18 in the transverse direction are not aligned. Two horizontal partitions 18 spaced apart means that only one horizontal partition 18 is spaced apart. The proximal ends of the horizontal partitions 18 are referred to as the respective ends near the respective side inner walls of the housing 10.

In the above, preferably, the intervals between the plurality of horizontal partition plates 18 are all equal.

In particular, with reference to the embodiment shown in fig. 1, the partition assembly comprises four horizontal partitions 18, the four horizontal partitions 18 being of equal length in the horizontal direction, the four horizontal partitions 18 defining, with the top and bottom walls of the casing 10, five rectilinear segments 11. For convenience of description, the four horizontal partition plates 18 are named as a first horizontal partition plate, a second horizontal partition plate, a third horizontal partition plate and a fourth horizontal partition plate from top to bottom in sequence. The first horizontal partition plate and the third horizontal partition plate are opposite to each other in the vertical direction, and the right end of the first horizontal partition plate is connected to the inner wall of the shell 10; the second horizontal partition plate and the fourth horizontal partition plate are opposite to each other in the vertical direction, and the left end of the second horizontal partition plate is connected to the inner wall of the shell 10; thus, there is a space between the left ends of the first and third horizontal partitions and the left inner wall of the casing 10, and a space between the right ends of the second and fourth horizontal partitions and the right inner wall of the casing 10, which form the turning section 12. That is, in this embodiment, the turn section 12 is defined by the inner wall of the housing 10 and the horizontal partition 18.

Further, the baffle assembly may further include a plurality of vertical baffles 19, the vertical baffles 19 being connected between two spaced apart horizontal baffles 18, the return section 12 being formed between the vertical baffles 19 and the proximal ends of the horizontal baffles 18 located between the two spaced apart horizontal baffles 18. That is, in this embodiment, the turn section 12 is defined by a horizontal partition 18 and a vertical partition 19.

Specifically, referring to the embodiment shown in fig. 1, the partition assembly includes four vertical partitions 19, the vertical partition 19 above the left side is connected between the top wall of the housing 10 and the second horizontal partition with a space between the left end of the first horizontal partition; the vertical clapboard 19 at the lower part of the left side is connected between the second horizontal clapboard and the fourth horizontal clapboard, and a space is reserved between the vertical clapboard and the left end of the third horizontal clapboard; the vertical clapboard 19 above the right side is connected between the first horizontal clapboard and the third horizontal clapboard, and a gap is reserved between the vertical clapboard and the right end of the second horizontal clapboard; the lower right vertical partition 19 is connected between the third horizontal partition and the bottom wall of the housing 10, and has a space with the right end of the fourth horizontal partition, and the four spaces form four turning sections 12.

Further, as shown in fig. 1, the vertical partition 19 has a space with the inner wall of the housing 10 in the lateral direction of the housing 10 (see the horizontal direction shown in fig. 1), the space is formed as a wave-transparent isolation region 20, the microwave generator 14 is located outside the housing 10 and is disposed corresponding to the wave-transparent isolation region 20, and a communication port communicating with the microwave breach of the microwave generator 14 is opened on a portion of the housing 10 for defining the wave-transparent isolation region 20. Through the setting of above-mentioned wave-transparent isolation region 20, can avoid VOCs in the reaction channel directly contacts with microwave generator 14 for microwave generator 14's high electric field strength can not produce adverse effect to VOCs, avoids the emergence of the phenomenon of discharging of striking sparks, thereby guarantees the whole safety of reactor, realizes antiknock safety design requirement.

As shown in fig. 1, the communication port is located at the middle of the wave-transparent isolation region 20 along the longitudinal direction, that is, the microwave breach of the microwave generator 14 is located at the middle of the wave-transparent isolation region 20 along the longitudinal direction, and the microwave breach of the microwave generator 14 is horizontally arranged toward the turning section 12 in a horn shape, so that the heating area of the microwave on the catalyst 13 can be increased, and the heating rate and the heating effect of the catalyst 13 can be further ensured.

In the above, the horizontal partition 18 is made of a non-wave-transparent material, so that the microwave can rapidly heat the catalyst 13 at the corresponding position, and the adjacent wave-transparent isolation regions 20 can be separated to avoid the mutual influence between two adjacent microwave generators 14. The vertical partition 19 is made of a wave-transparent material so that the microwaves emitted from the microwave generator 14 into the wave-transparent isolation region 20 can penetrate through the vertical partition 19 and enter the reaction channel to heat the catalyst 13.

One embodiment of the microwave-coupled catalytic reactor of the present invention is described in detail below with reference to fig. 1 and 2:

as shown in fig. 1 and 2, the casing 10 is a square body with a square cavity inside, the partition assembly includes four horizontal partitions 18 and four vertical partitions 19 in the shape of a square plate, the four horizontal partitions 18 have the same size, the width of the four horizontal partitions is equal to the width of the square cavity of the casing 10, and the length of the four horizontal partitions is smaller than the length of the square cavity; the four vertical partitions 19 are of identical size and have a width equal to the width of the square cavity of the casing 10. The four horizontal partitions 18 are evenly spaced apart in the vertical direction and define, with the top and bottom walls of the housing 10, five rectilinear segments 11. For convenience of description, the four horizontal partition plates 18 are sequentially named as a first horizontal partition plate, a second horizontal partition plate, a third horizontal partition plate and a fourth horizontal partition plate from top to bottom, and the five straight sections 11 are sequentially named as a first straight section, a second straight section, a third straight section, a fourth straight section and a fifth straight section from top to bottom.

The first horizontal partition plate and the third horizontal partition plate are opposite to each other in the vertical direction, and the other three sides except the left side are connected to the inner wall of the shell 10; the second horizontal partition plate and the fourth horizontal partition plate are opposite to each other in the vertical direction, and except for the right side, the other three sides are connected to the inner wall of the shell 10; the vertical partition plate 19 at the upper left side is connected between the top wall of the shell 10 and the second horizontal partition plate, and has a gap with the left end of the first horizontal partition plate; the vertical clapboard 19 at the lower part of the left side is connected between the second horizontal clapboard and the fourth horizontal clapboard, and a space is reserved between the vertical clapboard and the left end of the third horizontal clapboard; the vertical clapboard 19 above the right side is connected between the first horizontal clapboard and the third horizontal clapboard, and a gap is reserved between the vertical clapboard and the right end of the second horizontal clapboard; the lower right vertical partition 19 is connected between the third horizontal partition and the bottom wall of the housing 10, and has a space with the right end of the fourth horizontal partition, and the four spaces form four turning sections 12. The two vertical partition plates 19 on the left side have a space from the left inner wall of the housing 10, and the two vertical partition plates 19 on the right side have a space from the right inner wall of the housing 10, and these four spaces form four wave-transparent isolation regions 20. The four microwave generators 14 are respectively arranged outside the four wave-transparent isolation regions 20, wherein the microwave generator 14 above the left side can heat the catalyst 13 of the first straight section and the catalyst 13 in the left region of the second straight section, the microwave generator 14 below the left side can heat the catalyst 13 in the left regions of the third straight section and the fourth straight section, the microwave generator 14 above the right side can heat the catalyst 13 in the right regions of the second straight section and the third straight section, and the microwave generator 14 below the right side can heat the catalyst 13 in the right region of the fourth straight section and the catalyst 13 of the fifth straight section. The air inlet 15 is provided corresponding to the left side of the fifth rectilinear segment, and the air outlet 16 is provided corresponding to the right side of the first rectilinear segment.

Through the arrangement, the microwaves emitted by the microwave generators 14 on the two sides can effectively penetrate through the catalyst 13 at the corresponding position, so that the catalyst 13 can be uniformly heated in a subarea manner, the heating speed is high, and all the catalysts 13 can reach the optimal reaction state. In other embodiments, the number of wave-transparent isolation regions 20 and microwave generators 14 can be adjusted according to the length of the reaction channel. The loading of the catalyst 13 can also be adjusted accordingly, as long as effective penetration of the microwave energy is ensured.

In the invention, the heating temperature of the catalyst 13 is preferably 50-450 ℃, and the catalyst 13 has stronger wave-absorbing capability and heating uniformity in the temperature range. The catalyst 13 may include a carrier fixed in the straight section 11, a coating layer coated on the surface of the carrier, and an active element and an auxiliary agent attached to the coating layer. The coating, the active element and the auxiliary agent can adopt substances with high dielectric loss so as to have high wave absorbing capacity and realize effective temperature rise under microwave radiation; the carrier can adopt a substance with low dielectric loss so as to tend to a normal temperature state when being irradiated by microwave. Wherein the carrier may be selected from a cordierite honeycomb carrier or a cordierite-silicon carbide composite carrier, and the coating may include a binder and silicon carbide; the content of the cordierite honeycomb carrier or the cordierite-silicon carbide composite carrier may be 65 to 80 wt%, the content of the binder (which may contain alumina) may be 11.5 to 12 wt%, the content of the silicon carbide may be 0.5 to 16 wt%, the content of the active element may be 0.2 to 0.33 wt%, and the content of the auxiliary agent may be 7.11 to 7.15 wt%, based on the total weight of the catalyst; wherein the active element can be a group IB element (e.g., gold) and/or a group VIII element (e.g., iron, cobalt, palladium, platinum); the promoter may be selected from at least one of the lanthanide series elements (e.g. lanthanum, cerium), group IVB elements (e.g. zirconium), group VIIB elements (e.g. manganese) and group VIII elements.

Further, the VOCs treatment apparatus may further include a first temperature monitor for monitoring the temperature of the catalyst 13 and a second temperature monitor for monitoring the temperature of the gas to be treated which is to enter the reaction channel. This facilitates adjustment of the output power of the microwave generator 14 to ensure that the catalyst 13 is heated to the appropriate reaction temperature.

In order to improve the intelligence and efficiency of the VOCs treatment apparatus, the VOCs treatment apparatus may further comprise a controller electrically connected to the first temperature monitor, the second temperature monitor, and the microwave generator 14, respectively, the controller being configured to control the operation of the microwave generator 14 according to the temperatures monitored by the first temperature monitor and the second temperature monitor. The controller controls the operation of the microwave generator 14 including start-up, shut-down and power output levels.

When the temperature value monitored by the second temperature monitor is higher than that monitored by the first temperature monitor in use, the lowest temperature required by the reaction of the catalyst 13 can be kept, and the microwave generator 14 can be controlled to be turned off by the controller; when the temperature value monitored by the second temperature monitor is smaller than the temperature value monitored by the first temperature monitor, the controller can control the microwave generator 14 to start so as to heat the catalyst 13, and the power output of the microwave generator 14 is controlled according to the difference value of the two values.

Further, in the case where the microwave-coupled catalytic reactor has a plurality of microwave generators 14, the VOCs processing apparatus may include a plurality of the first temperature monitors, which may respectively monitor the temperatures of the respective zone catalysts 13 heated by the respective microwave generators 14, and the controller may respectively control the operations of the respective microwave generators 14 according to the temperatures monitored by the respective first temperature monitors. This can ensure that the temperature of the catalyst 13 is uniform in each region.

In the invention, the temperature monitor can be a fiber sensor, an infrared sensor or a temperature transmitter.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The microwave coupling catalytic reactor is characterized by comprising a shell (10) with a reaction channel arranged inside, wherein the reaction channel is in a snake shape formed by a plurality of straight sections (11) and a plurality of turning sections (12), the reaction channel is filled with a catalyst (13) for catalyzing oxidation of VOCs, each turning section (12) is correspondingly provided with a microwave generator (14), and the microwave generators (14) are used for radiating microwaves to the catalyst (13).

2. The microwave-coupled catalytic reactor according to claim 1, wherein the shell (10) is provided with an air inlet (15) communicated with one end of the reaction channel and an air outlet (16) communicated with the other end of the reaction channel, the air inlet (15) is used for allowing the gas to be treated containing VOCs to enter the reaction channel, and the air outlet (16) is used for allowing the purified gas generated in the reaction channel to be discharged out of the reaction channel.

3. The microwave-coupled catalytic reactor according to claim 2, wherein the housing (10) is made of a non-wave-transparent material, and the gas inlet (15) and the gas outlet (16) are respectively provided with a microwave shielding net (17).

4. A microwave-coupled catalytic reactor according to any of claims 1-3, characterized in that the reaction channel is arranged to extend in the longitudinal direction of the housing (10) and/or the catalyst (13) is filled in the straight sections (11).

5. The microwave-coupled catalytic reactor according to claim 4, characterized in that the length of the catalyst (13) in the direction of extension of the straight section (11) is twice the maximum skin depth of the microwaves of the catalyst (13).

6. The microwave coupled catalytic reactor according to claim 4, characterized in that the microwave coupled catalytic reactor comprises a baffle plate assembly for defining the reaction channel, the baffle plate assembly comprises a plurality of horizontal baffle plates (18), the plurality of horizontal baffle plates (18) are arranged at intervals along the longitudinal direction of the shell (10), two adjacent horizontal baffle plates (18) define the straight section (11) therebetween, two adjacent horizontal baffle plates (18) are mutually offset in the longitudinal direction of the shell (10), two spaced horizontal baffle plates (18) are mutually aligned in the longitudinal direction of the shell (10), and the turning section (12) is formed between the inner wall of the shell (10) and the proximal end of the horizontal baffle plate (18) between the two spaced horizontal baffle plates (18).

7. The microwave-coupled catalytic reactor according to claim 6, wherein the baffle assembly comprises a plurality of vertical baffles (19), the vertical baffles (19) being connected between two spaced apart horizontal baffles (18), the vertical baffles (19) forming the turning section (12) with the proximal ends of the horizontal baffles (18) located between the two spaced apart horizontal baffles (18).

8. The microwave-coupled catalytic reactor according to claim 7, wherein the vertical partition (19) and the inner wall of the shell (10) have a spacing in the transverse direction of the shell (10), the spacing is formed as a wave-transparent isolation region (20), the microwave generator (14) is located outside the shell (10) and is arranged corresponding to the wave-transparent isolation region (20), and a communication port communicated with the microwave breach of the microwave generator (14) is opened on the part of the shell (10) for defining the wave-transparent isolation region (20).

9. The microwave-coupled catalytic reactor according to claim 8, wherein the communication port is located at a middle portion of the wave-transparent isolation region (20) in a longitudinal direction.

10. The microwave-coupled catalytic reactor according to claim 7, wherein the horizontal partition (18) is made of a non-wave-transparent material and the vertical partition (19) is made of a wave-transparent material.

11. A VOCs treatment plant comprising the microwave-coupled catalytic reactor of any one of claims 1-10.

12. The apparatus of claim 11, wherein the apparatus comprises a first temperature monitor for monitoring the temperature of the catalyst (13) and a second temperature monitor for monitoring the temperature of the gas to be treated that is to enter the reaction channel.

13. The apparatus of claim 12, comprising a controller electrically connected to the first and second temperature monitors and the microwave generator (14), respectively, the controller being configured to control operation of the microwave generator (14) based on the temperatures monitored by the first and second temperature monitors.