An RTO device based on wave-absorbing heating honeycomb ceramic

Abstract

The utility model belongs to waste gas treatment technical field discloses a kind of RTO equipment based on wave-absorbing heating honeycomb ceramic.The utility model absorbs the microwave that waveguide tube transmits into oxidation chamber by setting wave-absorbing heating honeycomb ceramic piece in oxidation chamber to realize heating, and make the temperature in oxidation chamber reach the temperature required for work, and can preheat heat storage piece in heat storage chamber, and the waste gas to be handled enters heat storage chamber from the air inlet and outlet of one heat storage chamber and flows through heat storage piece to preheat, then reaches and occurs thermal oxidation reaction in oxidation chamber, generates carbon dioxide and water vapor, and the gas after purification passes another heat storage chamber, and exchanges heat with heat storage body therein and is cooled, and is discharged from the air inlet and outlet of this side.The RTO equipment based on wave-absorbing heating honeycomb ceramic of the utility model can be normally used under the condition that gas is not provided and has higher use safety and lower energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to an RTO device based on microwave-absorbing and heating honeycomb ceramics. Background Technology

[0002] RTO (Regenerative Thermal Oxidizer) equipment is an industrial heat treatment device used to treat organic waste gas and volatile organic compounds (VOCs). The combustion medium includes fuel gas, natural gas, and diesel. It uses a high temperature of 760-1000 degrees Celsius to cause a thermal oxidation reaction in the waste gas, generating carbon dioxide and water vapor. The purified gas is then cooled to national standards by a heat storage medium before being discharged, achieving a heat recovery rate of over 95%.

[0003] Traditional RTO (Regenerative Thermal Oxidizer) equipment uses gas heating, which, due to structural limitations, results in uneven internal temperature distribution and cannot be used without a natural gas supply. While some electrically heated RTO equipment has emerged, the materials used in electric heating are prone to oxidation at high temperatures, leading to reduced thermal conductivity and a shorter lifespan. Furthermore, the conductive metal materials used in electric heating are susceptible to electrical leakage, posing a safety risk. Electric heating also consumes more energy and significantly increases waste gas treatment costs.

[0004] Therefore, there is an urgent need for an RTO device that can be used without gas supply and has low energy consumption. Utility Model Content

[0005] The purpose of this invention is to provide an RTO device based on microwave absorbing and heating honeycomb ceramics, which has the advantages of not requiring the use of gas, high safety, and low energy consumption.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An RTO device based on microwave-absorbing and heating honeycomb ceramic includes an RTO body and an oxidation chamber and two heat storage chambers disposed within the RTO body and interconnected therewith. The oxidation chamber is provided with a microwave-absorbing and heating honeycomb ceramic component, and the heat storage chamber is provided with a heat storage component. An air inlet and outlet are provided at the end of the heat storage chamber away from the oxidation chamber.

[0008] The RTO body is equipped with a waveguide, one end of which extends into the oxidation chamber and the other end is equipped with a microwave source. The microwave source can generate microwaves, and the waveguide can transmit microwaves into the oxidation chamber so that the microwave-absorbing and heating honeycomb ceramic component absorbs and heats up, and the temperature in the oxidation chamber reaches the working temperature.

[0009] Preferably, the two heat storage chambers are located at opposite ends of the oxidation chamber; two microwave-absorbing and heating honeycomb ceramic components are provided and are located at the connection points between the two heat storage chambers and the oxidation chamber.

[0010] Preferably, the system also includes a temperature transmitter, which is communicatively connected to the microwave source.

[0011] Preferably, a bypass pipeline is also included, one end of which is connected to the oxidation chamber and the other end of which is connected to the chimney. A bypass valve is provided on the bypass pipeline, and the bypass valve is communicatively connected to the temperature transmitter.

[0012] Preferably, the system also includes an inlet / outlet pipe, an inlet pipe, and an exhaust pipe, wherein one end of the inlet / outlet pipe is connected to the inlet / outlet port, and the other end is optionally connected to the inlet pipe or the exhaust pipe.

[0013] Preferably, a switching valve is provided between the inlet / outlet air pipe and the inlet / outlet air pipe, and the inlet / outlet air pipe can be selectively connected to the inlet / outlet air pipe or the exhaust air pipe through the switching valve.

[0014] Preferably, the system also includes a pipe housing, in which both the intake pipe and the exhaust pipe are housed.

[0015] Preferably, the waveguide has a through hole along its own axis, one end of which is connected to the oxidation chamber and the other end is connected to an external gas source.

[0016] Preferably, the device also includes a sleeve, which is fixedly connected to the RTO body and is sleeved on the outside of the waveguide. The sleeve and the waveguide are coaxially spaced to form a protective channel, which is connected to an external air source.

[0017] Preferably, the inner wall of the oxidation chamber is provided with a heat-insulating fiber layer.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides an RTO device based on microwave-absorbing and heating honeycomb ceramic, comprising an RTO body and an oxidation chamber and two heat storage chambers disposed within and interconnected within the RTO body. The oxidation chamber contains a microwave-absorbing and heating honeycomb ceramic component, and the heat storage chamber contains a heat storage component. An inlet and outlet are located at the end of the heat storage chamber furthest from the oxidation chamber. A waveguide is mounted on the RTO body, with one end extending into the oxidation chamber and the other end connected to a microwave source. The microwave source generates microwaves, and the waveguide transmits microwaves into the oxidation chamber, causing the microwave-absorbing and heating honeycomb ceramic component to absorb microwaves and generate heat, thus raising the temperature within the oxidation chamber to the operating temperature. This invention utilizes a microwave-absorbing, heat-generating honeycomb ceramic component within the oxidation chamber to absorb microwaves transmitted through a waveguide, thereby raising the temperature within the oxidation chamber to the required operating temperature. It also preheats the heat storage components in the regenerative chamber. The waste gas to be treated enters the regenerative chamber through its inlet / outlet and flows through the heat storage components for preheating. It then reaches the oxidation chamber where a thermal oxidation reaction occurs, generating carbon dioxide and water vapor. The purified gas passes through another regenerative chamber, where it exchanges heat with the heat storage element and is cooled before being discharged through its inlet / outlet on that side. This RTO equipment based on microwave-absorbing, heat-generating honeycomb ceramic can operate normally without a gas supply, exhibiting high safety and low energy consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the RTO device based on microwave absorbing and heating honeycomb ceramic of this utility model.

[0021] In the picture:

[0022] 1. RTO main body; 11. Oxidation chamber; 12. Heat storage chamber; 121. Inlet and outlet; 13. Waveguide tube;

[0023] 2. Wave-absorbing and heating honeycomb ceramic components; 3. Heat storage components; 4. Temperature transmitter; 5. Bypass pipeline; 51. Bypass valve; 6. Inlet and outlet air pipelines; 7. Inlet air pipeline; 8. Exhaust air pipeline; 9. Switching valve; 10. Pipe box. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] This invention provides an RTO device based on microwave-absorbing and heating honeycomb ceramics, such as... Figure 1As shown, the device includes an RTO body 1 and an oxidation chamber 11 and two heat storage chambers 12 disposed within and interconnected with each other. An absorbing and heating honeycomb ceramic component 2 is disposed within the oxidation chamber 11, and a heat storage component 3 is disposed within the heat storage chambers 12. An air inlet / outlet 121 is located at the end of the heat storage chamber 12 furthest from the oxidation chamber 11. A waveguide 13 is disposed on the RTO body 1. One end of the waveguide 13 extends into the oxidation chamber 11, and the other end is connected to a microwave source. The microwave source generates microwaves, and the waveguide 13 transmits microwaves into the oxidation chamber 11, causing the absorbing and heating honeycomb ceramic component 2 to absorb and heat the microwaves, thus raising the temperature inside the oxidation chamber 11 to the operating temperature. This invention utilizes a microwave-absorbing, heat-generating honeycomb ceramic component 2 within the oxidation chamber 11 to absorb microwaves transmitted into the oxidation chamber 11 via a waveguide 13, thereby raising the temperature within the oxidation chamber 11 to the required operating temperature. This also preheats the heat storage component 3 within the heat storage chamber 12. The waste gas to be treated enters the heat storage chamber 12 through an inlet / outlet 121 and flows through the heat storage component 3 for preheating. It then reaches the oxidation chamber 11 where a thermal oxidation reaction occurs, generating carbon dioxide and water vapor. The purified gas then passes through another heat storage chamber 12, where it exchanges heat with the heat storage element and is cooled before finally exiting through the inlet / outlet 121 on that side. This RTO device based on microwave-absorbing, heat-generating honeycomb ceramic can operate normally without a gas supply and exhibits high safety and low energy consumption. It is understood that the microwave-absorbing, heat-generating honeycomb ceramic component 2 is a microwave-absorbing, heat-generating zinc oxide honeycomb ceramic, and its preparation method is existing technology in the field and will not be described further here. The waveguide 13 can be made of 304 stainless steel or carbon steel. In some embodiments, the microwave source includes a microwave power supply and a magnetron. The microwave power supply powers the magnetron, and the microwaves generated by the magnetron enter the oxidation chamber 11 through the waveguide 13 and are absorbed by the microwave-absorbing and heating honeycomb ceramic component 2. The microwave-absorbing and heating honeycomb ceramic component 2 absorbs the microwaves and generates heat to heat the oxidation chamber 11 to the required operating temperature. The heat storage component 3 is filled in the heat storage chamber 12. The heat storage component 3 is made of honeycomb ceramic material, and the honeycomb ceramic forms a heat storage honeycomb ceramic bed in the heat storage chamber 12. Gas can flow in the through holes and / or gaps in the heat storage honeycomb ceramic bed.

[0029] In some embodiments, such as Figure 1As shown, two regenerator chambers 12 are located on the same side of the oxidation chamber 11, at both ends of the oxidation chamber 11, and are parallel and spaced apart. It can be understood that the two regenerator chambers 12 are located on the same side of the oxidation chamber 11, and are respectively vertically arranged on both sides of the combustion chamber. This arrangement appropriately increases the length of the gas flow path formed by the regenerator chambers 12 and the oxidation chamber 11, thereby increasing the internal space of the RTO body 1. This extends the residence time of the gas in the regenerator chambers 12 and the oxidation chamber 11, allowing for more complete pyrolysis. The two regenerator chambers 12 are arranged parallel and spaced apart. This arrangement design makes the two regenerator chambers 12 and the oxidation chamber 11 form a U-shaped structure, making the overall structure of the RTO body 1 more compact and reasonable, and reducing the equipment's footprint.

[0030] In other embodiments, the RTO body may not be a U-shaped structure. It is sufficient to ensure that the two heat storage chambers 12 are located at the two ends of the oxidation chamber 11, and that there are two microwave absorbing and heating honeycomb ceramic components 2 located at the connection points between the two heat storage chambers 12 and the oxidation chamber 11. This can also achieve the effect of pyrolyzing the waste gas to be treated.

[0031] In some embodiments, two microwave-absorbing and heating honeycomb ceramic components 2 are provided, each located at the connection point between the two heat storage chambers 12 and the oxidation chamber 11. It is understood that by placing the microwave-absorbing and heating honeycomb ceramic components 2 at the connection point between the heat storage chamber 12 and the oxidation chamber 11, on the one hand, during cold start-up, the microwave-absorbing and heating honeycomb ceramic components 2 can preheat the heat storage components 3 in the heat storage chamber 12 while simultaneously heating the oxidation chamber 11, ensuring that the waste gas to be treated is preheated before entering the oxidation chamber 11, thus guaranteeing sufficient pyrolysis of the waste gas and improving the pyrolysis rate and stability. Furthermore, during the treatment process, the microwave-absorbing and heating honeycomb ceramic components 2 can remain in a heating state, heating the heat storage components 3 at the gas inlet end, extending the duration of unidirectional gas flow. On the other hand, during the pyrolysis process, since the oxidation chamber 11 is a closed cavity, it can serve as a microwave resonant cavity. This allows microwaves to propagate not only to the microwave-absorbing and heating honeycomb ceramic component 2 at the inlet end but also to the microwave-absorbing and heating honeycomb ceramic component 2 at the outlet end. This means that the heat storage component 3 at the outlet end can not only passively absorb the heat from the treated gas but also be actively heated by the microwave-absorbing and heating honeycomb ceramic component 2. This significantly shortens the heat storage time at the outlet end when processing gas in one direction, enabling faster preparation for changing the gas flow direction. In some optional embodiments, two waveguides 13 can be configured, each corresponding to one of the two microwave-absorbing and heating honeycomb ceramic components 2, to improve the accuracy of temperature control for the microwave-absorbing and heating honeycomb ceramic components 2 at different inlet and outlet ends and reduce energy consumption.

[0032] In some embodiments, such as Figure 1As shown, the RTO device based on microwave-absorbing heating honeycomb ceramic provided by this utility model also includes a temperature transmitter 4, which is communicatively connected to a microwave source. It can be understood that the oxidation chamber 11 is equipped with a temperature transmitter 4 that is interlocked with the microwave power supply. For example, when the temperature of the oxidation chamber 11 is below 800℃, the temperature transmitter 4 monitors and feeds back to the microwave power supply to increase the microwave power. By increasing the microwave power, the microwave-absorbing heating honeycomb ceramic component 2 absorbs more microwaves to generate heat, thereby increasing the temperature of the combustion chamber. When the temperature of the oxidation chamber 11 is above 900℃, the microwave power supply can be interlocked to decrease, reducing the heat generated by the microwave-absorbing heating honeycomb ceramic component 2.

[0033] In some embodiments, the RTO device based on microwave-absorbing heating honeycomb ceramic provided by this utility model further includes a bypass pipe 5. One end of the bypass pipe 5 is connected to the oxidation chamber 11, and the other end is connected to the chimney. A bypass valve 51 is provided on the bypass pipe 5, and the bypass valve 51 is communicatively connected to the temperature transmitter 4. It can be understood that, for example, when the temperature of the oxidation chamber 11 is higher than 900°C, while interlocking to reduce the microwave power supply, the high-temperature bypass valve 51 can also be interlocked to gradually open to discharge excess heat in order to keep the temperature of the oxidation chamber 11 within the set range, ensuring that the temperature inside the oxidation chamber 11 is always within the efficient pyrolysis range.

[0034] In some embodiments, the RTO device based on absorbing heat-generating honeycomb ceramic provided by this utility model further includes an inlet / outlet pipe 6, an inlet pipe 7, and an exhaust pipe 8. One end of the inlet / outlet pipe 6 is connected to the inlet / outlet port 121, and the other end can be selectively connected to the inlet pipe 7 or the exhaust pipe 8. It is understood that the RTO body 1 is connected to the inlet / outlet pipe 6, the inlet pipe 7, and the exhaust pipe 8, which facilitates flexible installation of the device and allows for adaptive adjustment of the device's spatial layout.

[0035] In some specific embodiments, a switching valve 9 is provided between the inlet / outlet pipe 6 and the inlet / outlet pipe 7 and the exhaust pipe 8. The inlet / outlet pipe 6 can be selectively connected to either the inlet / outlet pipe 7 or the exhaust pipe 8 via the switching valve 9. It can be understood that by setting the switching valve 9 to switch the connection between the inlet / outlet pipe 6 and the inlet / outlet pipe 7 or the exhaust pipe, the flow direction of the waste gas to be treated in the RTO body 1 can be switched, thereby ensuring the preheating effect of the heat storage element 3, realizing long-term continuous operation, and improving pyrolysis efficiency.

[0036] In some embodiments, the RTO equipment based on microwave-absorbing and heating honeycomb ceramics provided by this utility model further includes a pipe housing 10, with the inlet pipe 7 and the exhaust pipe 8 both disposed within the pipe housing 10. It is understood that placing the inlet pipe 7 and the exhaust pipe 8 within the pipe housing 10 prevents the pipes from being exposed to dust in the workshop. Furthermore, a combustible gas monitoring device can be installed within the pipe housing 10 to monitor for leaks in real time, ensuring production safety. Additionally, the pipe housing 10 simplifies the pipe transportation and installation process, resulting in a more organized workshop layout. The pipe housing 10 has openings, through which the ends of the inlet pipe 7 and the exhaust pipe 8 furthest from the inlet and outlet pipes pass and connect to external pipes.

[0037] In some embodiments, the waveguide 13 has a through-hole along its axial direction, with one end connected to the oxidation chamber 11 and the other end connected to an external air source. It is understood that by introducing compressed air into the through-hole through an external air source, the high-temperature gas inside the oxidation chamber 11 can be prevented from entering the waveguide 13, thus providing thermal insulation and cooling protection for the waveguide 13. Since the waveguide 13 is relatively small compared to the RTO body 1, the amount of compressed air introduced is very small and will not have a substantial impact on the temperature inside the oxidation chamber 11.

[0038] In some alternative embodiments, the RTO device based on absorbing and heating honeycomb ceramics provided by this invention also includes a sleeve, which is fixedly connected to the RTO body 1 and sleeved on the outside of the waveguide 13. The sleeve and the waveguide 13 are coaxially spaced to form a protective channel, which is connected to an external air source. It is understood that the fixed connection between the waveguide 13 and the sleeve, and the fixation of the waveguide 13 to the RTO body 1 via the sleeve, forms a protective channel, i.e., an annular gap, between the sleeve and the waveguide 13. Compressed air is introduced through the external air source, which prevents high-temperature gas in the oxidation chamber 11 from entering the waveguide 13, thus providing heat insulation and cooling protection for the waveguide 13. Furthermore, since the waveguide 13 and the sleeve are relatively small compared to the RTO body 1, the amount of compressed air introduced is very small and will not have a substantial impact on the temperature inside the oxidation chamber 11.

[0039] In some embodiments, the inner wall of the oxidation chamber 11 is provided with a heat-insulating fiber layer. It is understood that the heat-insulating fiber layer on the inner wall of the oxidation chamber 11 can reduce heat loss within the oxidation chamber 11.

[0040] This utility model provides an RTO device based on microwave-absorbing and heating honeycomb ceramic. The RTO technology for treating organic waste gas uses a microwave-absorbing and heating honeycomb ceramic component 2 as the heating source. Under a microwave field, the ceramic absorbs microwaves, rapidly heating up to 800℃~850℃ via thermal radiation. A temperature transmitter 4 monitors the temperature inside the oxidation chamber 11 and adjusts the microwave power based on the temperature feedback, achieving precise control of the heating temperature. Under a microwave field (within 2.45GHz), the microwave-absorbing and heating honeycomb ceramic component 2 can rapidly reach a red-hot state within 3-15 seconds, with the material surface temperature reaching 1200-1400℃. (The last sentence appears to be incomplete and possibly refers to a 1000m...) 3 Taking a 60kW RTO with a processing capacity of / h as an example, the initial furnace start-up (cold start) takes 1-1.5 hours to ensure that the temperature of oxidation chamber 11 is around 800 degrees Celsius. It is understandable that the microwave-absorbing heating honeycomb ceramic component 2 needs to be higher than the temperature of oxidation chamber 11 to maintain its temperature stability. Even after preheating in the regenerator chamber 12, the temperature of the waste gas is relatively low. When the waste gas passes through the microwave-absorbing heating honeycomb ceramic component 2, the heat from the component is transferred to the waste gas, causing the component 2 to cool down, resulting in a heat exchange process. This process accelerates the pyrolysis of the waste gas, improving pyrolysis efficiency, and prevents excessive nitrogen oxide emissions due to overheating of the component 2.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An RTO device based on microwave-absorbing and heating honeycomb ceramic, characterized in that, It includes an RTO body (1) and an oxidation chamber (11) and two heat storage chambers (12) disposed in the RTO body (1) and interconnected. The oxidation chamber (11) is provided with a wave-absorbing and heat-generating honeycomb ceramic component (2), and the heat storage chamber (12) is provided with a heat storage component (3). The end of the heat storage chamber (12) away from the oxidation chamber (11) is provided with an air inlet and outlet (121). The RTO body (1) is provided with a waveguide (13). One end of the waveguide (13) extends into the oxidation chamber (11), and the other end is provided with a microwave source. The microwave source can generate microwaves, and the waveguide (13) can transmit microwaves into the oxidation chamber (11) so that the microwave-absorbing and heating honeycomb ceramic part (2) absorbs and heats up, and the temperature inside the oxidation chamber (11) reaches the working temperature.

2. The RTO device based on microwave-absorbing heating honeycomb ceramic according to claim 1, characterized in that, The two heat storage chambers (12) are located at both ends of the oxidation chamber (11); two of the wave-absorbing heating honeycomb ceramic parts (2) are provided and are located at the communication ports of the two heat storage chambers (12) and the oxidation chamber (11).

3. The RTO device based on microwave-absorbing heating honeycomb ceramic according to claim 1, characterized in that, It also includes a temperature transmitter (4), which is communicatively connected to the microwave source.

4. The RTO device based on microwave-absorbing heating honeycomb ceramic according to claim 3, characterized in that, It also includes a bypass pipeline (5), one end of which is connected to the oxidation chamber (11) and the other end is connected to the chimney. A bypass valve (51) is provided on the bypass pipeline (5) and the bypass valve (51) is communicatively connected to the temperature transmitter (4).

5. The RTO device based on absorbing heat-generating honeycomb ceramic according to claim 1, characterized in that, It also includes an air inlet / outlet pipe (6), an air inlet pipe (7), and an exhaust pipe (8). One end of the air inlet / outlet pipe (6) is connected to the air inlet / outlet port (121), and the other end can be selectively connected to the air inlet pipe (7) or the exhaust pipe (8).

6. The RTO device based on microwave-absorbing heating honeycomb ceramic according to claim 5, characterized in that, A switching valve (9) is provided between the air inlet / outlet pipe (6) and the air inlet pipe (7) and the air outlet pipe (8). The air inlet / outlet pipe (6) can be selectively connected to the air inlet pipe (7) or the air outlet pipe (8) through the switching valve (9).

7. The RTO device based on microwave-absorbing heating honeycomb ceramic according to claim 5, characterized in that, It also includes a pipe housing (10), in which the air intake pipe (7) and the exhaust pipe (8) are both located.

8. The RTO device based on microwave-absorbing heating honeycomb ceramic according to claim 1, characterized in that, The waveguide (13) has a through hole along its own axis. One end of the through hole is connected to the oxidation chamber (11), and the other end is connected to an external gas source.

9. The RTO device based on microwave-absorbing heating honeycomb ceramic according to claim 1, characterized in that, It also includes a sleeve, which is fixedly connected to the RTO body (1) and is sleeved on the outside of the waveguide (13). The sleeve and the waveguide (13) are coaxially spaced to form a protective channel, which is connected to an external air source.

10. The RTO device based on microwave-absorbing heating honeycomb ceramic according to any one of claims 1-9, characterized in that, The inner wall of the oxidation chamber (11) is provided with a heat-insulating fiber layer.

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