A waveguide protection device and microwave pyrolysis equipment

Abstract

The present invention relates to the field of microwave heating technology, and specifically provides a waveguide protection device and a microwave pyrolysis device, comprising: a baffle assembly, which is arranged on a waveguide to separate the waveguide into a first waveguide and a second waveguide, wherein the second waveguide is connected to a pyrolysis chamber of the pyrolysis device; an inlet channel, which has an outlet end, and the outlet end is arranged close to the baffle assembly, and a protective medium flowing out of the inlet channel forms a dielectric protection layer at the baffle assembly. The waveguide is separated into a first waveguide and a second waveguide by the baffle assembly, wherein the second waveguide is connected to the pyrolysis chamber, and then a protective medium is introduced into the inlet channel, and after the protective medium flows out along the inlet channel, a dielectric protection layer is formed at the baffle assembly, and a high-temperature carbon-containing mixture generated from the pyrolyzed material undergoes an oxidation reaction with the protective medium in the dielectric protection layer to generate carbon monoxide or carbon dioxide, so that after the carbon in the impurities is oxidized, the impurity mixture will not pollute and damage the waveguide feed port.

Description

Technical Field

[0001] The invention relates to the technical field of microwave heating, and in particular to a waveguide protection device and microwave pyrolysis equipment. Background Art

[0002] The principle of microwave heating technology is: when the medium to be heated is placed in a microwave electromagnetic field, the polar molecules and non-polar molecules in the dielectric material will form dipoles or the existing dipoles will be rearranged. In this process, the molecules will swing at a speed of up to hundreds of millions of times per second with the high-frequency alternating electromagnetic field. During this period, it is necessary to overcome the interference and obstruction of the original thermal motion of the molecules and the interaction between molecules. Therefore, an effect similar to friction will be produced, causing the electromagnetic energy to gradually be converted into thermal energy, causing the temperature of the medium to increase significantly.

[0003] Compared with traditional fossil energy heating technology, microwave heating technology has more uniform heating, lower heat transfer loss, higher heating efficiency, better environmental protection and higher safety. Therefore, the industrial field has gradually begun to apply microwave heating technology. For example, in recent years, microwave pyrolysis furnaces have been gradually used to heat waste plastics, waste rubber, medical waste, chemical sludge and other media, so that these media are pyrolyzed into oil, non-condensable combustible gas and solid products.

[0004] During the microwave pyrolysis process, the pyrolysis equipment is operated in a high-temperature environment. The pyrolyzed materials will produce smoke and gas, which contain a large amount of impurities such as carbon. When the smoke and gas enter the feed port of the waveguide, the impurities will contaminate the feed port of the waveguide, especially the contamination of the feed port of the waveguide by absorbing materials such as carbon, which will seriously affect the microwave transmission performance, reduce the working efficiency of the pyrolysis equipment, and even damage the waveguide. After the waveguide is damaged, it will affect the transmission of microwaves, thereby reducing the working efficiency of the pyrolysis equipment. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the impurities in the smoke and gas generated when processing materials will contaminate the feed port of the waveguide, especially the contamination of the feed port of the waveguide by absorbing materials such as carbon, which will seriously affect the microwave transmission performance, reduce the working efficiency of the pyrolysis equipment, and even damage the waveguide, thereby providing a waveguide protection device and a microwave pyrolysis equipment having the device.

[0006] A waveguide protection device comprises: a baffle assembly, which is arranged on the waveguide to separate the waveguide into a first waveguide and a second waveguide, wherein the second waveguide is connected to a pyrolysis chamber of a pyrolysis device; an inlet channel, which has an outlet end, wherein the outlet end is arranged close to the baffle assembly, and a protective medium flowing out of the inlet channel forms a medium protection layer at the baffle assembly.

[0007] Furthermore, the second waveguide forms a waveguide cavity, the waveguide cavity is communicated with the pyrolysis cavity, the outlet end is located in the waveguide cavity, and the dielectric protection layer is formed in the waveguide cavity.

[0008] Furthermore, the second waveguide is provided with at least one penetrating introduction channel.

[0009] Furthermore, the barrier assembly includes two layers of barrier members, a sealed cavity is formed between the two layers of barrier members, the sealed cavity has an air inlet and an air outlet, and the sealed cavity is filled with a heat-conducting medium.

[0010] Furthermore, the heat conducting medium is air or non-flammable gas.

[0011] Furthermore, it also includes a detector arranged at the sealed cavity, which is used to detect the sealing state of the sealed cavity and / or detect the temperature of the baffle assembly.

[0012] Furthermore, the detector includes an air pressure measuring instrument disposed near the air inlet for measuring the air pressure in the sealed cavity, and a temperature measuring instrument disposed at the air outlet for measuring the temperature at the air outlet.

[0013] Furthermore, the barrier assembly includes two layers of barrier members, a sealed cavity is formed between the two layers of barrier members, at least one through hole is provided on the first barrier member connected to the waveguide cavity, the gap between the two layers of barrier members is the introduction channel, and the through hole is the outlet end.

[0014] Furthermore, it also includes a detector arranged at the sealed cavity, which is used to detect the sealing state of the sealed cavity and / or detect the temperature of the baffle assembly.

[0015] Furthermore, the barrier is a quartz glass plate or silicon nitride.

[0016] Furthermore, the baffle components include two groups, and the two groups of baffle components are alternately placed between the first waveguide and the second waveguide.

[0017] Furthermore, the protective medium is air; or water vapor; or steam of a non-flammable liquid, and the steam can chemically react with the carbon particles.

[0018] Furthermore, it also includes at least one driving mechanism, and the power output end of the driving mechanism is connected to the baffle assembly to drive the baffle assembly to move relative to the waveguide.

[0019] Furthermore, the driving mechanism comprises a driving member, a fixed arm and a supporting arm, wherein the fixed arm is fixed on the waveguide, one end of the supporting arm is arranged on the fixed arm, and the other end is connected to the driving member.

[0020] A microwave pyrolysis device, comprising

[0021] A waveguide group, one end of which is connected to the microwave generator, and the other end of which is connected to the pyrolysis cavity;

[0022] A waveguide protection device, wherein the waveguide protection device is the waveguide protection device as described above, and the waveguide group is connected to the waveguide protection device.

[0023] Furthermore, it also includes a cooling component, which is arranged on the second waveguide and is used to cool the second waveguide.

[0024] The technical solution of the present invention has the following advantages:

[0025] 1. A waveguide protection device provided by the present invention includes: a baffle assembly, which is arranged on the waveguide to separate the waveguide into a first waveguide and a second waveguide, wherein the second waveguide is connected to a pyrolysis chamber of a pyrolysis device; an inlet channel, which has an outlet end, and the outlet end is arranged close to the baffle assembly, and the protection medium flowing out of the inlet channel forms a medium protection layer at the baffle assembly. The waveguide is separated into a first waveguide and a second waveguide by a baffle component, wherein the second waveguide is connected to the pyrolysis chamber, and then a protective medium is introduced into the introduction channel. After the protective medium flows out along the introduction channel, a dielectric protective layer is formed at the baffle component. Then, due to the blocking of the baffle component, the protective medium evenly fills the dielectric protective layer, and finally the dielectric protective layer is in a state of slightly positive pressure. The high-temperature carbon-containing mixture generated from the pyrolyzed material undergoes an oxidation reaction with the protective medium in the dielectric protective layer to generate carbon monoxide or carbon dioxide and release heat, thereby achieving the effect that after the carbon in the impurities is oxidized, the impurity mixture will not pollute and damage the waveguide feed port, thereby avoiding the waste gas containing carbon impurities affecting the microwave transmission effect; at the same time, it also achieves the oxidation of carbon impurities already attached to the microwave feed port, and there is no need to open the waveguide for manual cleaning after the material processing is completed, thereby achieving the self-cleaning effect of the waveguide of the pyrolysis equipment and protecting the waveguide from damage.

[0026] 2. In a waveguide protection device provided by the present invention, the second waveguide forms a waveguide cavity, the waveguide cavity is connected to the pyrolysis cavity, the outlet end is located in the waveguide cavity, and the dielectric protection layer is formed in the waveguide cavity. In a specific application, the second waveguide forms a waveguide cavity, and the outlet end is arranged inside the waveguide cavity, so that the protective medium can be directly introduced into the waveguide cavity to achieve the effect of performing an oxidation reaction inside the second waveguide, avoiding the situation where the carbon-containing mixture is transported from the inside of the pyrolysis cavity to the second waveguide, and simplifying the structure of the waveguide protection device, making it more convenient to use.

[0027] 3. In a waveguide protection device provided by the present invention, at least one penetrating introduction channel is provided on the second waveguide. The introduction channel is provided on the second waveguide, and the protection medium is introduced into the medium protection layer in the second waveguide through the introduction channel, so that the protection medium can be transported into the second waveguide more quickly to react with the carbon-containing mixture for oxidation, thereby improving the efficiency of transporting the protection medium.

[0028] 4. In a waveguide protection device provided by the present invention, the barrier assembly includes two layers of barrier members, a sealed cavity is formed between the two layers of barrier members, the sealed cavity has an air inlet and an air outlet, and the sealed cavity is filled with a heat-conducting medium. By setting the barrier assembly as two layers of barrier members, a sealed cavity is formed between the two layers of barrier members, and a heat-conducting medium is introduced into the sealed cavity, the heat-conducting medium enters along the air inlet, and then outputs the sealed cavity along the air outlet, the heat-conducting medium can have a cooling effect on the barrier member, and at the same time, the heat-conducting medium is in a sealed state after being input into the sealed cavity, and in the sealed state, pollutants or other gases can be prevented from entering the microwave generator. By detecting the pressure at the air inlet of the sealed cavity, it is judged whether the barrier member is in a damaged state, so as to further judge whether there is a possibility of pollutants or other gases entering the microwave generator, thereby ensuring the normal operation of the equipment.

[0029] 5. A waveguide protection device provided by the present invention further comprises a detector disposed at the sealed cavity, for detecting the sealing state of the sealed cavity, and / or detecting the temperature of the barrier component. The detector is used to judge whether the sealed cavity is in a normal sealing state, and whether the temperature rises sharply. If the temperature rises sharply, it means that the barrier component has been damaged and needs to be replaced.

[0030] 6. In a waveguide protection device provided by the present invention, the barrier assembly includes two layers of barrier members, a sealed cavity is formed between the two layers of barrier members, at least one through hole is provided on the first barrier member connected to the waveguide cavity, the gap between the two layers of barrier members is an introduction channel, and the through hole is an outlet end. By using the gap between the two layers of barrier members as an introduction channel, a protective medium is introduced between the two layers of barrier members, and then the protective medium enters the medium protection layer along the gap between the two layers of barrier members, while the oxidation reaction occurs with the carbon-containing mixture in the medium protection layer, the oxidation reaction can also occur with the carbon impurities attached to the waveguide, thereby achieving a cleaning effect on the waveguide.

[0031] 7. In a waveguide protection device provided by the present invention, the barrier components have two groups, and the two groups of barrier components are alternately placed between the first waveguide and the second waveguide. By setting the barrier components into two groups and alternately placing them between the first waveguide and the second waveguide, after the pyrolysis equipment has been running for a period of time, the barrier located at the medium protection layer can be switched to another barrier to work, and it is checked whether the switched barrier is in a clean state, so as to avoid the situation where a large amount of impurities attached to the barrier affect the normal operation of the equipment, so as to ensure that the material is in a normal processing state.

[0032] 8. The waveguide protection device provided by the present invention further comprises at least one driving mechanism, the power output end of the driving mechanism is connected to the barrier assembly to drive the barrier assembly to move relative to the waveguide. The barrier is driven to move by the driving mechanism to achieve the effect of automatically switching the barrier, which is simple to operate and avoids the problem of possible burns to operators due to the high temperature of the pyrolysis reaction.

[0033] 9. A microwave pyrolysis device provided by the present invention comprises a waveguide group, which is arranged on the shell, one end of the waveguide group is connected to the microwave generator, and the other end is connected to the pyrolysis chamber; a waveguide protection device, the waveguide protection device is the waveguide protection device as described above, and the waveguide group is connected to the waveguide protection device. Since the microwave pyrolysis device adopts the above waveguide protection device, any one of the advantages described in the above waveguide protection device is realized, and the microwave pyrolysis device can stably transport microwaves to the inside of the pyrolysis chamber during the pyrolysis process, ensuring that sufficient heat is generated for pyrolysis of materials, improving pyrolysis efficiency, and heating is uniform and safe.

[0034] 10. The microwave pyrolysis device provided by the present invention further includes a cooling component, which is arranged on the second waveguide and is used to cool the second waveguide. The second waveguide is cooled by the cooling component to avoid the temperature of the second waveguide being too high, which may affect the operation of the device and ensure the normal operation of the device.

[0035] 11. In a microwave pyrolysis device provided by the present invention, the protective medium is air; or water vapor; or steam of a non-flammable liquid, and the steam can react chemically with carbon particles. The chemical cleaning method is adopted, and the operation is convenient for operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A front view of a waveguide protection device provided in a first embodiment of the present invention;

[0038] Figure 2 for Figure 1 A top view of a waveguide protection device;

[0039] Figure 3 It is a schematic diagram of the position structure of the waveguide protection device on the microwave pyrolysis equipment;

[0040] Description of reference numerals:

[0041] 1- waveguide group; 11- first waveguide; 12- second waveguide;

[0042] 2- Waveguide protection device;

[0043] 21- barrier assembly; 211- barrier member; 212- sealing cavity; 213- air inlet; 214- air outlet;

[0044] 22-introduction channel; 221-exit end; 222-medium protection layer;

[0045] 3-driving mechanism; 31-driving member; 32-fixed arm; 33-supporting arm;

[0046] 4-cooling component; 5-pyrolysis chamber; 6-detector; 7-microwave generator. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] Embodiment 1:

[0052] The embodiment of the present invention describes a microwave pyrolysis device for pyrolysis treatment of waste plastics, waste rubber, medical waste, chemical sludge, industrial hazardous waste and other media, with high pyrolysis efficiency, such as Figure 3 As shown, the microwave pyrolysis equipment includes a pyrolysis chamber and a waveguide group 1 and a waveguide protection device 2 connected to the pyrolysis chamber. The material to be processed is placed inside the pyrolysis chamber, and then the microwaves emitted from the microwave generator 7 are transported along the waveguide group 1 to the inside of the pyrolysis chamber 5, generating heat inside the pyrolysis chamber 5, thereby realizing the pyrolysis reaction of the material to be processed.

[0053] Specifically, if Figure 1 , Figure 2 As shown, the waveguide group 1 includes a first waveguide 11 and a second waveguide 12, wherein the first waveguide 11 is connected to the microwave generator, and the second waveguide 12 is connected to the pyrolysis chamber 5, and the waveguide protection device 2 is arranged between the first waveguide 11 and the second waveguide 12 to protect the waveguide group 1.

[0054] In this embodiment, the waveguide protection device includes a baffle assembly 21 and an introduction channel 22, wherein the baffle assembly 21 plays a role of sealing and protection, and the baffle assembly 21 is arranged between the first waveguide 11 and the second waveguide 12, see Figure 1 and Figure 2The inlet channel 22 has an outlet end 221, and the outlet end 221 is arranged close to the baffle assembly 21. The protective medium is input into the inlet channel 22. The protective medium flowing out of the outlet end 221 of the inlet channel 22 forms a medium protective layer 222 at the baffle assembly 21. The protective medium is slowly filled in the medium protective layer 222. Then, the protective medium undergoes an oxidation reaction with the carbon-containing mixture produced by the pyrolysis reaction at the medium protective layer 222 to produce carbon dioxide or carbon monoxide, thereby preventing carbon particulate matter from adhering to the waveguide and causing damage to the waveguide. , and carbon is an absorbing material, which will absorb microwaves and affect the transmission of microwaves along the waveguide to the pyrolysis chamber 5, thereby improving the efficiency of the pyrolysis reaction of the material. After the protective medium is input into the medium protective layer 222, the medium protective layer 222 is in a state of slightly positive pressure, which can also prevent the carbon-containing mixture from being transported to the waveguide. Specifically, the protective medium can be air, or it can be water vapor or other non-flammable liquid vapor, wherein the vapor can undergo an oxidation chemical reaction with the carbon particles, and the gas generated after the chemical reaction is discharged from the pyrolysis chamber 5.

[0055] Specifically, the second waveguide 12 can be surrounded by a waveguide cavity, which is connected to the pyrolysis cavity 5. The outlet end 221 is arranged inside the waveguide cavity, and a protective medium is input into the second waveguide 12 to achieve the effect of forming a medium protective layer 222 in the waveguide cavity. The oxidation reaction is directly carried out inside the second waveguide 12 to avoid the carbon-containing mixture being transported from the inside of the pyrolysis cavity 5 to the second waveguide 12.

[0056] In this embodiment, see Figure 1 and Figure 2 At least one of the above-mentioned introduction channels 22 can be set on the second waveguide 12. The introduction channel 22 is opened on the second waveguide 12, and the protective medium is introduced into the medium protective layer 222 in the second waveguide 12 from the introduction channel 22. The protective medium can be transported to the second waveguide 12 more quickly to undergo an oxidation reaction with the carbon-containing mixture, thereby improving the efficiency of transporting the protective medium. Generally speaking, when the number of introduction channels 22 is large, the protective medium can be quickly channeled into the interior of the second waveguide 12. The operator will set the number of the introduction channels 22 according to specific needs.

[0057] In this embodiment, see Figure 1 and Figure 2The barrier assembly 21 includes two layers of barrier members 211, and a sealed cavity 212 is formed between the two layers of barrier members 211, wherein the sealed cavity 212 has an air inlet 213 and an air outlet 214, and a heat-conducting medium is filled into the sealed cavity 212 through the air inlet 213, wherein the air outlet 214 is in a closed state. The heat-conducting medium is filled into the sealed cavity 212, on the one hand, to cool the barrier member 211 by utilizing heat exchange, and on the other hand, to detect whether the sealed cavity 212 is in a sealed state. Specifically, the heat-conducting medium can be air, and of course, it can also be other non-flammable gases, such as nitrogen.

[0058] In order to detect whether the sealing cavity 212 is in a sealed state, see Figure 1 and Figure 2 A detector 6 can be set at the above-mentioned air inlet 213, and the detector 6 is used to detect whether the above-mentioned sealed cavity 212 is in a sealed state. When the pressure in the sealed cavity 212 is detected to be 0Kpa, it means that the sealed cavity 212 is not in a sealed state, and further indicates that the double-layer baffle 211 has been damaged and needs to be repaired or replaced; when the value on the detector 6 is not 0Kpa, it means that it is in a sealed state, and the double-layer baffle 211 in a sealed state can prevent pollutants or others from entering the microwave generator along the waveguide, thereby ensuring the normal operation of the pyrolysis equipment. Specifically, the detector 6 can be a barometer.

[0059] In this embodiment, a measuring thermometer can also be set at the above-mentioned air outlet 214 to detect the temperature of the barrier component 21. When the temperature of the barrier component 21 rises rapidly, it means that the barrier 211 is in a damaged state and needs to be replaced. The damage of the barrier 211 will affect the transmission of microwaves in the waveguide, and further affect the normal operation of the pyrolysis reaction. Specifically, the barrier 211 can be set to a quartz glass plate, or other materials that do not absorb microwaves, such as silicon nitride, or mica, or ceramic barrier.

[0060] In this embodiment, in order to not affect the transmission of microwaves in the waveguide and the transmission of protective medium to the inside of the medium protective layer 222, the barrier assembly 21 can be set to two groups, and the two groups of barrier assemblies 21 are alternately placed between the first waveguide 11 and the second waveguide 12, wherein the two groups of barrier assemblies 21 can be driven by the driving mechanism 3 to reciprocate and switch, and the power output end of the driving mechanism 3 is connected to the barrier assembly 21. Specifically, the driving mechanism 3 includes a driving member 31, a fixed arm 32 and a supporting arm 33, wherein the fixed arm 32 is fixed on the outer wall surface of the waveguide, one end of the supporting arm 33 is fixed to one end of the fixed arm 32 away from the outer wall surface of the waveguide, and the other end is connected to the driving member 31. Under the drive of the driving member 31, the barrier assembly 21 reciprocates relative to the waveguide. Specifically, the driving member 31 can be a cylinder member, and of course it can also be a hydraulic cylinder or a motor to provide a power source for driving the barrier assembly 21. Of course, the barrier assembly 21 can also be set to three groups or four groups, and the operator can set it according to the specific usage.

[0061] In the present embodiment, the microwave pyrolysis equipment may further include a cooling component 4, which is disposed on the second waveguide 12 for cooling the second waveguide 12, wherein the cooling component 4 may be a water jacket, in which cold water is circulated, and under the action of the cold water, the heat on the second waveguide 12 can be taken away, thereby preventing the temperature of the second waveguide 12 from being too high and affecting the operation of the equipment, thereby ensuring the normal operation of the equipment.

[0062] Embodiment 2:

[0063] The present embodiment provides a microwave pyrolysis device, which is different from the microwave pyrolysis device provided in Example 1 in that, in the present embodiment, the barrier component 21 includes two layers of barrier members 211, a sealed cavity 212 is formed between the two layers of barrier members 211, at least one through hole is provided on the first barrier member 211 connected to the waveguide cavity in the second waveguide 12, the gap between the two layers of barrier members 211 is used as an introduction channel 22, the through hole is used as an outlet end 221, a protective medium is introduced into the sealed cavity 212, and the protective medium is input into the waveguide cavity along the through hole on the first barrier member 211 as an outlet, and by changing the air intake mode of the protective medium into the medium protective layer 222, an oxidation reaction can occur with the carbon-containing mixture in the medium protective layer 222, and an oxidation reaction can occur with the carbon impurities attached to the waveguide, so that the waveguide can achieve a self-cleaning effect.

[0064] In this embodiment, a detector 6 may be further provided at the sealing cavity 212 to detect the sealing state of the sealing cavity 212 and the temperature of the baffle assembly 21 .

[0065] In this embodiment, the distance between the two layers of barrier members 211 can be set to 20 mm, and can certainly be set to 30 mm, as long as the distance is within the range of 10 mm-100 mm.

[0066] Embodiment 3:

[0067] This embodiment provides a microwave pyrolysis device. Compared with the microwave pyrolysis device provided in Embodiment 1 and Embodiment 2, the cross-section of the tube body of the second waveguide 12 can be square or circular. When it is a circular waveguide, the size is 123.82mm*247.65mm, the round mouth diameter is 310mm, and the height is 375mm. The corresponding size can be changed according to the actual size. The square mouth size ranges from 50mm*50mm to 500mm*500mm, the round mouth diameter ranges from 100mm in diameter to 1000mm in diameter, and the height ranges from 100mm to 1000mm.

[0068] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A waveguide protection device, characterized in that: include, A baffle assembly (21) is arranged on the waveguide to separate the waveguide into a first waveguide (11) and a second waveguide (12), wherein the second waveguide (12) is connected to a pyrolysis chamber (5) of a pyrolysis device; and the second waveguide (12) is provided with at least one penetrating introduction channel (22); The introduction channel (22) has an outlet end (221), the outlet end (221) is arranged close to the baffle assembly (21), and the protective medium flowing out of the introduction channel (22) forms a medium protective layer (222) at the baffle assembly (21); The invention also comprises at least one driving mechanism (3), wherein a power output end of the driving mechanism (3) is connected to the baffle assembly (21) so as to drive the baffle assembly (21) to move relative to the waveguide; the driving mechanism (3) comprises a driving member (31), a fixed arm (32) and a supporting arm (33), wherein the fixed arm (32) is fixed on the waveguide, and one end of the supporting arm (33) is arranged on the fixed arm (32), and the other end is connected to the driving member (31); The baffle components (21) have two, three or four groups, and the two, three or four groups of baffle components (21) are alternately placed between the first waveguide (11) and the second waveguide (12); The barrier assembly (21) comprises two layers of barrier members (211), a sealed cavity (212) is formed between the two layers of barrier members (211), the sealed cavity (212) has an air inlet (213) and an air outlet (214), and a heat-conducting medium is filled in the sealed cavity (212); a through hole is provided on the first barrier member connected to the waveguide cavity; the second waveguide (12) forms a waveguide cavity, the waveguide cavity is connected to the pyrolysis cavity (5), the outlet end (221) is located in the waveguide cavity, and the medium protection layer (222) is formed in the waveguide cavity; The waveguide protection device further comprises a detector arranged at the sealed cavity (212) for detecting the sealing state of the sealed cavity (212) and / or detecting the temperature of the baffle assembly (21).

2. The waveguide protection device according to claim 1, characterized in that: The heat transfer medium is air or non-flammable gas.

3. The waveguide protection device according to claim 1, characterized in that: The detector comprises an air pressure measuring instrument arranged near the air inlet (213) for measuring the air pressure in the sealed cavity (212), and a temperature measuring instrument arranged at the air outlet (214) for measuring the temperature at the air outlet (214).

4. The waveguide protection device according to claim 1, characterized in that: The barrier (211) is a quartz glass plate or silicon nitride.

5. The waveguide protection device according to claim 1, characterized in that: The protective medium is air; or water vapor; or steam of a non-flammable liquid, and the steam can chemically react with the carbon particles.

6. A microwave pyrolysis device, characterized in that: include A waveguide group (1), one end of the waveguide group (1) is connected to the microwave generator, and the other end of the waveguide group (1) is connected to the pyrolysis chamber (5); The waveguide protection device (2) is the waveguide protection device (2) according to any one of claims 1 to 5, wherein the waveguide group (1) is connected to the waveguide protection device (2).

7. A microwave pyrolysis device according to claim 6, characterized in that: It also comprises a cooling component (4), wherein the cooling component (4) is arranged on the second waveguide (12) and is used to cool the second waveguide (12).

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