CN113209920B

CN113209920B - Microwave coupling catalytic reactor and VOCs treatment equipment

Info

Publication number: CN113209920B
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 Safety Engineering Research Institute Co Ltd
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: 2023-06-20
Anticipated expiration: 2040-05-25
Also published as: CN113209920A

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 formed by a plurality of straight sections (11) and a plurality of turning sections (12), a catalyst (13) for catalyzing the oxidation of VOCs is filled in the reaction channel, 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 not only can realize the integral uniform heating of the catalyst and ensure that all the catalysts in the reaction channel reach the optimal reaction state, but also can effectively improve the heating speed and the reaction efficiency, reduce the energy consumption and avoid the waste of the catalyst, so that the microwave coupling catalytic reactor 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 equipment

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, a heating furnace or the like is generally used for heating exhaust gas containing VOCs, and then the catalyst is heated from bottom to top or from top to bottom to the reaction temperature layer by a heat conduction mode. The heating mode has the advantages of long heating time, high energy consumption, uneven heating, incapability of enabling all catalysts to reach the optimal reaction state, easiness in causing 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 so as to solve the problems.

In order to achieve the above object, according to an aspect of the present invention, there is provided a microwave coupling catalytic reactor, including a housing having a reaction channel therein, the reaction channel being serpentine formed by a plurality of straight-going sections and a plurality of turning sections, the reaction channel being filled with a catalyst for catalyzing the oxidation of VOCs, each of the turning sections being correspondingly provided with a microwave generator for radiating microwaves to the catalyst.

Optionally, an air inlet communicated with one end of the reaction channel and an air outlet communicated with the other end of the reaction channel are arranged on the shell, the air inlet is used for allowing the gas to be treated containing VOCs to enter the reaction channel, and the air outlet is used for allowing the purified gas generated in the reaction channel to be discharged out of the reaction channel.

Optionally, the shell is made of a non-wave-transparent material, and microwave shielding nets are respectively arranged at the air inlet and the air outlet.

Optionally, the reaction channel is arranged to extend in the longitudinal direction of the housing, 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 microwave maximum skin depth of the catalyst.

Optionally, the microwave coupled catalytic reactor includes a partition assembly for defining the reaction channel, the partition assembly includes a plurality of horizontal partitions, the plurality of horizontal partitions are disposed at intervals along a longitudinal direction of the housing, the straight line section is defined between two adjacent horizontal partitions, the two adjacent horizontal partitions are offset from each other in the longitudinal direction of the housing, the two horizontal partitions at intervals are aligned with each other in the longitudinal direction of the housing, and the turning section is formed between an inner wall of the housing and a proximal end of the horizontal partition between the two horizontal partitions at intervals.

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 between two spaced apart horizontal baffles.

Optionally, the vertical partition plate and the inner wall of the shell are provided with a space in the transverse direction of the shell, the space is formed into a wave-transmitting isolation area, the microwave generator is located outside the shell and corresponds to the wave-transmitting isolation area, and a communication port communicated with a microwave crumple of the microwave generator is formed in a part of the shell for limiting the wave-transmitting isolation area.

Optionally, the communication port is located at a middle part of the wave-transparent isolation area along a longitudinal direction.

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

In another aspect, the present invention provides a VOCs treatment apparatus comprising a microwave coupled catalytic reactor as described above.

Optionally, the VOCs treatment apparatus comprises 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 treated that is to enter the reaction channel.

Optionally, the VOCs treatment 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 temperature monitor and the second temperature monitor.

According to the microwave coupling catalytic reactor, the reaction channel is formed into the snake shape, the microwave generators are correspondingly arranged at each turning section of the snake-shaped reaction channel respectively, and the catalyst in the reaction channel is heated by utilizing the plurality of microwave generator partitions, so that the catalyst can be heated uniformly, the optimal reaction state of all the catalyst in the reaction channel is ensured, the heating speed and the reaction efficiency can be effectively improved, the energy consumption is reduced, the waste of the catalyst 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 included to provide a further understanding of the invention, illustrate and explain the invention and are not to be construed as limiting the invention.

In the drawings:

FIG. 1 is a schematic diagram of one embodiment of a microwave coupled catalytic reactor in accordance with 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 plate, 19-vertical partition plate and 20-wave-transmitting isolation area.

Detailed Description

The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, left, right, top, bottom" are used to refer generally to the orientation shown with reference to FIG. 1. "inner and outer" means inner and outer relative to the contour of the respective parts themselves.

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 the 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 foregoing description, the reaction channel is used for the catalytic oxidation reaction of VOCs with the catalyst 13 to convert into carbon dioxide and water vapor, and release heat. The VOCs are treated by adopting the double coupling action of the microwaves and the catalyst 13 and utilizing the thermal effect and the non-thermal effect of the microwaves, the thermal effect of the microwaves has the characteristics of rapid heating and selective heating, and the surface active elements of the catalyst can be rapidly in a high-temperature state to form a high Wen Dianwei, and the heating time is only required to be a few minutes, so that the heating time of the catalyst is greatly shortened; the non-thermal effect of the microwaves causes the microwave electric field to cause rapid rotation of electric dipoles in the compound, the process is regarded as molecular stirring, and the absorbed microwave energy is transmitted to the catalyst lattice by the medium due to the molecular stirring, so that the release and transfer rate of oxygen in the catalyst lattice are 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 snake shape, the microwave generators 14 are correspondingly arranged at each turning section 12 of the snake-shaped reaction channel, and the catalyst 13 in the reaction channel is heated by utilizing the plurality of microwave generators 14 in a partitioning way, so that the catalyst 13 is heated uniformly as a whole, all the catalysts 13 in the reaction channel are 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 catalyst 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 2, a gas inlet 15 communicating with one end of the reaction channel and a gas outlet 16 communicating with the other end of the reaction channel are provided on the housing 10, the gas inlet 15 is used for allowing the gas to be treated containing VOCs to enter the reaction channel, and the gas outlet 16 is used for allowing the purge gas generated in the reaction channel to be discharged outside the reaction channel.

During the reaction, the 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 leakage of microwaves in the housing 10, 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, in order to secure the safety of the reactor, the overall design pressure of the casing 10 is greater than the maximum chemical explosive force of VOCs. The catalyst 13 can be a honeycomb or granular high-efficiency wave-absorbing catalyst, so that the filling of the catalysts with different heights and different sectional areas is realized.

In the present invention, the housing 10 may have any suitable shape, such as square, cylindrical, etc. The reaction channel may extend in any direction within the housing 10. According to an embodiment of the present invention, as shown in FIG. 1, the reaction channel is provided to extend in the longitudinal direction of the housing 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 folds of the reaction channel within the housing 10.

In the present invention, as shown in fig. 1, the catalyst 13 may be filled in the straight traveling section 11. That is, the catalyst 13 is not filled in the turning section 12. Since 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 opposite to the microwave generator 14, and the microwaves emitted by the microwave generator 14 can effectively penetrate the catalyst 13 at the corresponding position, so that the catalyst 13 can rapidly reach the surface high temperature.

Wherein, 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 microwaves emitted from two microwave generators 14 located at both sides of the straight section 11 can penetrate through half of the entire length of the catalyst 13 in the straight section 11, respectively, so that the catalyst 13 is uniformly heated as a whole. In addition, the length value of the catalyst 13 in two dimensions perpendicular to the vertical direction can be reasonably set according to the flow velocity of the gas stream, and the cross-sectional shape thereof 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 disposed at intervals along the longitudinal direction of the housing 10, the straight run 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 horizontal partitions 18 are aligned with each other in the longitudinal direction of the housing 10, and the turning 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 horizontal partitions 18.

In the above description, the fact that the two horizontal partitions 18 are offset from each other in the longitudinal direction of the housing 10 means that both ends of the two horizontal partitions 18 in the lateral direction are not aligned. Two horizontal partitions 18 spaced apart means that only one horizontal partition 18 is spaced apart therebetween. The proximal end of the horizontal partition 18 refers to the respective end that is adjacent to the respective side inner wall of the housing 10.

In the above, the intervals between the plurality of horizontal partitions 18 are preferably equal.

Specifically, referring to the embodiment shown in fig. 1, the baffle assembly includes four horizontal baffles 18, the four horizontal baffles 18 being of equal length in the horizontal direction, the four horizontal baffles 18 defining five straight segments 11 with the top and bottom walls of the housing 10. For convenience of description, four horizontal partitions 18 are named first, second, third, and fourth horizontal partitions in order from top to bottom. Wherein 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 and the third horizontal partition plate 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 the left end of the second horizontal partition plate is connected to the inner wall of the shell 10; whereby the left ends of the first and third horizontal partitions have a space between them and the left inner wall of the housing 10, and the right ends of the second and fourth horizontal partitions have a space between them and the right inner wall of the housing 10, these spaces forming said turning sections 12. That is, in such an embodiment, the turn section 12 is defined by the inner wall of the housing 10 and the horizontal partition 18.

Further, the diaphragm assembly may further comprise a plurality of vertical diaphragms 19, the vertical diaphragms 19 being connected between two spaced apart horizontal diaphragms 18, the vertical diaphragms 19 forming the turn section 12 with the proximal ends of the horizontal diaphragms 18 located between the two spaced apart horizontal diaphragms 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 bulkhead assembly includes four vertical bulkheads 19, the upper left vertical bulkhead 19 being connected between the top wall of the housing 10 and the second horizontal bulkhead with a space between the top wall and the left end of the first horizontal bulkhead; the vertical partition plate 19 at the lower left side is connected between the second horizontal partition plate and the fourth horizontal partition plate, and a space is arranged between the vertical partition plate and the left end of the third horizontal partition plate; the vertical partition plate 19 on the upper right side is connected between the first horizontal partition plate and the third horizontal partition plate, and a space is arranged between the vertical partition plate and the right end of the second horizontal partition plate; the vertical partition 19 at the lower right side 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, which is formed as four turning sections 12.

Further, as shown in fig. 1, the vertical partition 19 and the inner wall of the casing 10 have a space in the lateral direction of the casing 10 (see the horizontal direction shown in fig. 1) formed as a wave-transparent isolation region 20, the microwave generator 14 is located outside the casing 10 and disposed corresponding to the wave-transparent isolation region 20, and a communication port communicating with a microwave crumple port of the microwave generator 14 is opened on a portion of the casing 10 for defining the wave-transparent isolation region 20. Through the arrangement of the wave-transparent isolation area 20, VOCs in the reaction channel can be prevented from being in direct contact with the microwave generator 14, so that the high electric field intensity of the microwave generator 14 can not adversely affect the VOCs, the occurrence of the spark discharge phenomenon is avoided, the overall safety of the reactor is ensured, and the antiknock safety design requirement is realized.

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

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

An 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 housing 10 is a square body with a square cavity inside, the partition plate assembly comprises four horizontal partition plates 18 and four vertical partition plates 19 which are square plate-shaped, the four horizontal partition plates 18 are consistent in size, the width is equal to the width of the square cavity of the housing 10, and the length is smaller than the length of the square cavity; the four vertical partitions 19 are uniform in size and have a width equal to the width of the square cavity of the housing 10. Four horizontal partitions 18 are arranged at regular intervals in the vertical direction and define five straight sections 11 together with the top and bottom walls of the housing 10. For convenience of description, the four horizontal partitions 18 are named as a first horizontal partition, a second horizontal partition, a third horizontal partition, and a fourth horizontal partition in order from top to bottom, and the five straight-running sections 11 are named as a first straight-running section, a second straight-running section, a third straight-running section, a fourth straight-running section, and a fifth straight-running section in order from top to bottom.

Wherein 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 casing 10; the second horizontal partition plate and the fourth horizontal partition plate are opposite to each other in the vertical direction, and the other three sides except the right side are connected to the inner wall of the shell 10; 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 from the left end of the first horizontal partition; the vertical partition plate 19 at the lower left side is connected between the second horizontal partition plate and the fourth horizontal partition plate, and a space is arranged between the vertical partition plate and the left end of the third horizontal partition plate; the vertical partition plate 19 on the upper right side is connected between the first horizontal partition plate and the third horizontal partition plate, and a space is arranged between the vertical partition plate and the right end of the second horizontal partition plate; the vertical partition 19 at the lower right side 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, which is formed as four turning sections 12. The two vertical partitions 19 on the left side are spaced from the left side inner wall of the housing 10, and the two vertical partitions 19 on the right side are spaced from the right side inner wall of the housing 10, and the four spaces are formed as four wave-transparent isolation areas 20. The four microwave generators 14 are respectively arranged outside the four wave-transparent isolation areas 20, wherein the microwave generator 14 at the upper left side can heat the catalyst 13 of the first straight section and the catalyst 13 at the left side area of the second straight section, the microwave generator 14 at the lower left side can heat the catalyst 13 at the left side area of the third straight section and the fourth straight section, the microwave generator 14 at the upper right side can heat the catalyst 13 at the right side area of the second straight section and the third straight section, and the microwave generator 14 at the lower right side can heat the catalyst 13 at the right side area of the fourth straight section and the catalyst 13 at the fifth straight section. The air inlet 15 is arranged corresponding to the left side of the fifth straight section and the air outlet 16 is arranged corresponding to the right side of the first straight section.

Through the arrangement, microwaves emitted by the microwave generators 14 on two sides can effectively penetrate through the catalyst 13 at the corresponding position, so that the catalyst 13 can be heated uniformly in a partitioned mode, 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 zones 20 and microwave generators 14 may 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 present invention, the heating temperature of the catalyst 13 is preferably 50-450 ℃, and the catalyst 13 has strong wave absorbing capacity and heating uniformity in the temperature range. The catalyst 13 may comprise a support fixed in the straight run 11, a coating applied to the surface of the support, and active elements and adjuvants attached to the coating. Wherein, the coating, the active element and the auxiliary agent can all adopt substances with higher dielectric loss so as to have higher wave absorption capacity and realize effective temperature rise under microwave radiation; the carrier can adopt substances with lower dielectric loss so as to be in a normal temperature state when being irradiated by microwaves. Wherein the support may be selected from a cordierite honeycomb support or a cordierite-silicon carbide composite support, and the coating may include a binder and silicon carbide; based on the total weight of the catalyst, the cordierite honeycomb carrier or the cordierite-silicon carbide composite carrier may have a cordierite content of 65-80 wt%, the binder (which may contain alumina) may have a binder content of 11.5-12 wt%, the silicon carbide may have a silicon carbide content of 0.5-16 wt%, the active element may have a content of 0.2-0.33 wt%, and the auxiliary agent may have a content of 7.11-7.15 wt%; wherein the active element may 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 lanthanoids (e.g., lanthanum, cerium), the group IVB elements (e.g., zirconium), the group VIIB elements (e.g., manganese), and the 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 to be introduced into the reaction channel. This facilitates the regulation of the output 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 in dependence on the temperatures monitored by the first temperature monitor and the second temperature monitor. The control of the operation of the microwave generator 14 by the controller includes start-up, shut-down, and power output levels.

In use, when the temperature value monitored by the second temperature monitor is greater than the temperature value monitored by the first temperature monitor, it indicates that the catalyst 13 is capable of maintaining the minimum temperature required for the reaction, at which time the microwave generator 14 can be controlled by the controller to be turned off; 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 treatment apparatus may include a plurality of the first temperature monitors, the plurality of the first temperature monitors may monitor the temperatures of the respective zone catalysts 13 heated by the respective microwave generators 14, respectively, and the controller may control the operation of the respective microwave generators 14 according to the temperatures monitored by the respective first temperature monitors, respectively. This ensures that the catalyst 13 in each zone is at a uniform temperature.

In the present invention, the temperature monitor may be an optical fiber sensor, an infrared sensor, a temperature transmitter, or the like.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but 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 scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.

Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.

Claims

1. The microwave coupling catalytic reactor is characterized by comprising a shell (10) with a reaction channel inside, wherein the reaction channel is in a serpentine shape formed by a plurality of straight sections (11) and a plurality of turning sections (12), a catalyst (13) for catalyzing the oxidation of VOCs is filled in the reaction channel, the reaction channel is arranged to extend longitudinally along the shell (10), the catalyst (13) is filled in the straight sections (11), the length of the catalyst (13) in the extending direction of the straight sections (11) is twice the maximum skin depth of microwaves of the catalyst (13), and a microwave generator (14) is correspondingly arranged in each turning section (12) and is used for radiating microwaves to the catalyst (13);

the microwave coupled catalytic reactor further comprises a baffle plate assembly for defining the reaction channels, the baffle plate assembly comprising a plurality of horizontal baffle plates (18) and a plurality of vertical baffle plates (19), the vertical baffle plates (19) being connected between two spaced apart horizontal baffle plates (18),

the vertical partition plate (19) and the inner wall of the shell (10) are provided with a space in the transverse direction of the shell (10), the space is formed into a wave-transmitting isolation area (20), and the microwave generator (14) is positioned outside the shell (10) and corresponds to the wave-transmitting isolation area (20).

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

3. The microwave-coupled catalytic reactor according to claim 2, characterized in that the housing (10) is made of a non-wave-transparent material, the air inlet (15) and the air outlet (16) being provided with microwave shielding screens (17), respectively.

4. A microwave coupled catalytic reactor according to any of claims 1-3, characterized in that a plurality of said horizontal partitions (18) are arranged at intervals in the longitudinal direction of said housing (10), adjacent two of said horizontal partitions (18) defining said straight run (11) therebetween, adjacent two of said horizontal partitions (18) being offset from each other in the longitudinal direction of said housing (10), spaced two of said horizontal partitions (18) being aligned with each other in the longitudinal direction of said housing (10), an inner wall of said housing (10) forming said turning section (12) with a proximal end of said horizontal partition (18) located between said spaced two horizontal partitions (18).

5. A microwave-coupled catalytic reactor according to claim 4, characterized in that the turning section (12) is formed between the vertical partition (19) and the proximal end of the horizontal partition (18) located between two spaced apart horizontal partitions (18).

6. The microwave-coupled catalytic reactor according to claim 5, characterized in that a communication port communicating with a microwave crumple of the microwave generator (14) is opened on a portion of the housing (10) for defining the wave-transparent isolation zone (20).

7. The microwave-coupled catalytic reactor according to claim 6, wherein the communication port is located in a longitudinally middle portion of the wave-transparent isolation zone (20).

8. A microwave-coupled catalytic reactor according to claim 5, characterized in that the horizontal partition (18) is made of a non-wave-transparent material and the vertical partition (19) is made of a wave-transparent material.

9. A VOCs treatment apparatus comprising a microwave coupled catalytic reactor according to any one of claims 1 to 8.

10. The VOCs treatment apparatus according to claim 9, characterized in that the VOCs treatment 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.

11. The VOCs treatment apparatus according to claim 10, characterized in that the VOCs treatment apparatus comprises a controller electrically connected to the first temperature monitor, the second temperature monitor and the microwave generator (14), respectively, the controller being arranged to be able to control the operation of the microwave generator (14) in dependence of the temperatures monitored by the first temperature monitor and the second temperature monitor.