CN108079900B

CN108079900B - Microwave high-pressure reaction kettle

Info

Publication number: CN108079900B
Application number: CN201711422133.8A
Authority: CN
Inventors: 李艳君
Original assignee: Hunan Change Microwave Technology Co ltd
Current assignee: Hunan Change Microwave Technology Co ltd
Priority date: 2017-12-25
Filing date: 2017-12-25
Publication date: 2021-04-20
Anticipated expiration: 2037-12-25
Also published as: CN108079900A

Abstract

The invention discloses a microwave high-pressure reaction kettle, which comprises a kettle body, a kettle cover, a stirring device and a microwave energy feedback device, wherein the kettle cover is hermetically connected with an opening of the kettle body; the microwave excitation feed-in pressure-bearing device comprises a circular tube arranged on the kettle body, a loudspeaker positioned in the kettle body, a cone pressure-bearing part positioned in the loudspeaker and a wave-transmitting fixing part for limiting the movement of the cone pressure-bearing part; the antenna of the magnetron is positioned in the circular tube. The microwave energy feedback device has the advantages that the microwave enters the kettle body through the cone pressure-bearing part after being excited by the coaxial resonant cavity and the loudspeaker, the efficient excitation and the microwave energy feedback with the controllable microwave conduction direction are realized, the inner diameter of the circular pipe can be reduced to 5-30mm, the cone pressure-bearing part is attached to the inner wall of the loudspeaker and fixed through the fixing part, the pressure leakage is effectively prevented, the stress condition of the kettle body and the cone pressure-bearing part is greatly improved, and the difficulty in pressure design and processing of the kettle body and the microwave energy feedback device is greatly reduced.

Description

Microwave high-pressure reaction kettle

Technical Field

The invention belongs to chemical reaction equipment, and particularly relates to a microwave high-pressure reaction kettle.

Background

Microwave chemistry has been rapidly developed in various industries such as chemistry since it emerged as an edge science worldwide in the end of the last eighties. At present, scientific research and production have higher practicability requirements on microwave chemical reaction devices, how to enable the efficient, energy-saving and environment-friendly microwave chemical reaction devices to meet different production requirements of various industries, and new challenges are provided for the traditional microwave chemical reaction devices in the aspects of reaction pressure, working power, temperature control and the like.

The literature: the key technical research of the frequency conversion high-temperature steam microwave oven indicates that in a general microwave reaction device, it is difficult to find a waveguide port with good coupling in the same resonant cavity, and the work of matching a waveguide port meeting the performance requirement almost accounts for more than 80% of the experimental workload of the whole product. The microwave high-temperature reaction kettle not only needs to consider the problem of microwave excitation, but also needs to consider the problem of high-pressure bearing, so that the design difficulty is higher. The design scheme which only considers one aspect and does not consider the other aspect is not in accordance with the actual requirement.

The feeding method and the feeding structure of the microwave device are the key and difficult points for realizing the air pressure, and are limited by the feeding mode and the feeding structure, the feeding structure is difficult to ensure the pressure resistance of the feeding part, the air flow is easy to leak from the microwave device due to the overhigh pressure, the internal pressure is continuously reduced, the heat loss rate is high, and meanwhile, the leaked liquid flow is easy to impact the microwave source, so that the function failure of the microwave source, the equipment damage and the great safety risk exist.

At present, the feed-in pressure-bearing structure of a microwave device mainly comprises:

firstly, a waveguide-blind plate feeding pressure-bearing mode of a conventional microwave device is adopted.

Secondly, feeding in by adopting a round bottom test tube type wave-transparent element pressure-bearing mode.

In industrial microwave heating, the most widely used is microwave with frequency of 2450MHz, commonly used is BJ26 rectangular feed waveguide, and the size of the rectangular opening is 43.2 x 86.4 mm; in patent CN200610046206, a rectangular waveguide flange is adopted, the size of the rectangular opening is 45mm x 90mm, and a quartz plate with the diameter of 120mm is sealed and pressed. The microwave feeding mode has the advantages that the rectangular hole is formed in the autoclave body, so that the pressure design of the autoclave body is seriously influenced; because the penetration depth of microwaves in a solution, particularly an aqueous solution, is limited, the penetration depth in the aqueous solution is generally not more than 3-8cm, a reaction kettle needs to be produced in an enlarged size, and a plurality of microwave devices are required to be uniformly matched and used from the angle of uniform heating or the angle of microwave feeding depth, when rectangular waveguide energy feeding is adopted, a plurality of rectangular openings are formed, high borosilicate glass and quartz glass are generally selected on a pressure bearing part of a pressure container, national standards GB/T23259 and NB/T47017-2011 clearly indicate that the diameter of the pressure bearing glass is in inverse proportion to the allowable pressure bearing, the stress of the rectangular right-angle position is concentrated, the opening size is large, and the pressure bearing design and the processing difficulty of a kettle body of the reaction kettle and a microwave feeding window are greatly increased.

In patents CN201410471234 and CN201410471231, a round-bottom tube-type wave-transparent element pressure-bearing manner is adopted for feeding, a large-size waveguide opening is adopted for connection on a reaction kettle body, and similarly, when a plurality of microwave devices are used in combination, the uniform arrangement of the microwave devices is seriously influenced due to the limitation of the opening size of a pressure container and the number of corresponding openings, and the design and processing difficulty of the pressure-bearing pressure of the kettle body of the high-pressure reaction kettle and the pressure-bearing pressure of a microwave feeding window are increased; meanwhile, the length of the microwave magnetron antenna is generally between 25 and 50mm, in a large-size high-pressure container, the thickness of 2 fixed flange surfaces and the thickness of a kettle wall are generally more than 10mm, and the exposed length of standard 2450MHz and 915MHz magnetron antennas commonly used in the industry and a rectangular cavity are difficult to match and combine to excite microwaves.

In the prior art, the pressure design and processing difficulty of the reaction device is greatly increased and the application range of the microwave high-pressure device is limited by the limitation of a microwave energy-feeding pressure-bearing structure.

Disclosure of Invention

The invention aims to provide a microwave high-pressure reaction kettle, and aims to solve the technical problem that in the prior art, the pressure design and processing difficulty of a reaction device is greatly increased due to the limitation of a microwave energy-feedback pressure-bearing structure.

The microwave energy feedback device comprises a kettle body, a kettle cover hermetically connected with an opening of the kettle body, a stirring device and a microwave energy feedback device, wherein the microwave energy feedback device comprises a magnetron and a microwave excitation feed-in pressure-bearing device;

the microwave excitation feed-in pressure-bearing device comprises a circular tube arranged on the kettle body, a loudspeaker positioned in the kettle body, a cone pressure-bearing part positioned in the loudspeaker and a wave-transmitting fixing part for limiting the cone pressure-bearing part to move;

the antenna of the magnetron is positioned in the circular tube, the antenna and the circular tube form a coaxial resonant cavity, and the coaxial resonant cavity and the horn form a microwave excitation device.

The inner diameter of the circular tube is 5-30 mm. The length of the round tube is 1/4-1/2 of transmitting microwave wavelength. When the thickness of the kettle body wall is reduced, the uniform distribution of a plurality of microwave devices and the high-efficiency excitation energy feedback of microwaves are ensured, and the heating uniformity of the substance is realized.

The height of the cone of the horn is 10-100 mm, the diameter of the horn is 45-180 mm, the preferred height of the cone is 20-50 mm, and the diameter of the horn is 60-140 mm.

The cone bearing part is made of at least one of polytetrafluoroethylene, quartz glass, high-purity alumina, high borosilicate glass and PEEK plastic. The material is wave-transparent material and has pressure resistance.

A sealing gasket is arranged between the cone pressure-bearing part and the inner wall of the horn, and a sealing gasket is arranged between the cone pressure-bearing part and the wave-transmitting fixing part. The sealing gasket is made of at least one of polytetrafluoroethylene, fluororubber and nitrile rubber.

The wave-transmitting fixing piece is a hollow metal flange or a flat plate made of wave-transmitting materials. When the fixing piece is a hollow metal flange, a gasket for force buffering is arranged between the flange and the cone pressure-bearing piece.

The microwave energy feedback devices are uniformly arranged on the kettle body.

The kettle cover and the kettle body are tightly screwed through bolts, and a sealing gasket is arranged between the kettle cover and the kettle body.

The invention also comprises a feed inlet and a discharge outlet, wherein the feed inlet is arranged on the kettle cover, the discharge outlet is arranged at the bottom of the kettle body, the feed inlet and the discharge outlet are both provided with valves, and the number of the feed inlets is 1 or more.

The kettle cover is provided with a pressure measuring device, a temperature measuring device, an automatic pressure relief electromagnetic valve and a safety valve;

the outside of the kettle body is also provided with a controller for controlling the temperature and the pressure in the kettle body;

the kettle body is connected with a pressurizing device.

The stirring device comprises a stirring shaft and stirring blades.

The invention has the beneficial effects that: the antenna of the magnetron is positioned in the circular tube, the antenna and the circular tube form a coaxial resonant cavity, the coaxial resonant cavity is combined with the horn according to a certain size proportion to form a microwave excitation device, microwaves enter the kettle body through the cone bearing part after being excited by the microwave excitation device to realize high-efficiency microwave excitation energy feedback, the microwave feed port on the kettle body is a circular tube, the inner diameter of the circular tube can be reduced to 5-30mm, the cone bearing part is attached to the inner wall of the horn and fixed through the wave-transparent fixing part, gas or liquid is effectively prevented from leaking from the microwave feed port, the opening size of the kettle body is greatly reduced under the condition of ensuring the effective microwave excitation, the opening shape is improved, the stress condition of the kettle body, the microwave feed port and the cone bearing part is improved, the use pressure of the high-pressure reaction kettle can be increased to higher pressure, the use range of the high-pressure reaction kettle is expanded, and a plurality of microwave energy feedback devices are uniformly, when realizing the even heating of high-pressure batch autoclave, greatly reduced the cauldron body and the microwave present the bearing pressure design of ability device and the degree of difficulty of processing. Meanwhile, the microwave feed point is moved into the reaction kettle, the microwave can penetrate to the more central position of the reaction system, the influence of weakened reaction effect caused by the penetration depth of the microwave is reduced, and the reaction kettle with larger size can be arranged in the same reaction system.

Drawings

Fig. 1 is a schematic structural diagram of a microwave energy feedback device of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

In the figure, 1 kettle body, 2 magnetron, 3 round tube, 4 wave-transparent fixing piece, 5 cone pressure-bearing piece, 6 sealing gasket, 7 antenna, 8 coaxial resonant cavity, 9 microwave energy-feedback device, 10 bolt, 11 kettle cover, 12 safety valve, 13 pressure-measuring device, 14 stirring device, 15 temperature-measuring device, 16 feeding hole, 17 valve, 18 discharging hole, 19 automatic pressure-relief electromagnetic valve, 20 horn.

Detailed Description

As shown in fig. 1 and fig. 2, the invention comprises a kettle body 1, a kettle cover 11 hermetically connected with an opening of the kettle body 1, a stirring device 14, a feeding port 16, a discharging port 18 and a microwave energy feeding device 9, wherein the microwave energy feeding device 9 comprises a magnetron 2 and a microwave excitation feeding pressure-bearing device;

the microwave excitation feed-in pressure-bearing device comprises a circular tube 3 arranged on the kettle body 1, a horn 20 positioned in the kettle body 1, a cone pressure-bearing part 5 positioned in the cone 20 and a wave-transparent fixing part 4 for limiting the movement of the cone pressure-bearing part 5;

the antenna 7 of the magnetron 2 is positioned in the circular tube 3, the antenna 7 and the circular tube 3 form a coaxial resonant cavity 8, and the coaxial resonant cavity 8 and the horn 20 form a microwave excitation device.

The kettle body 1 and the kettle cover 11 are both made of special high-strength metal plates so as to ensure the pressure resistance of the kettle.

The cone pressure-bearing piece 5 seals the pressure in the kettle body 1 and prevents the gas or/and liquid in the kettle body 1 from leaking from the circular tube 3. If the cone pressure-bearing part 5 is not arranged, leaked gas or/and liquid can damage the microwave energy feedback device 9, the reaction kettle cannot guarantee the pressure required by the reaction, and safety risks exist.

The magnetron 2 is fixed with the kettle body 1 through screws and a fixing plate and is tightly pressed with the circular tube 3, the antenna 7 of the magnetron 2 is arranged in the circular tube 3 to form a coaxial resonant cavity 8, and a microwave excitation device formed by the coaxial resonant cavity 8 and the loudspeaker 20 is used for effectively exciting microwaves. The round tube 3 and the horn 20 are both made of high-strength metal.

The stirrer of the stirring device 14 is positioned in the kettle body 1, the stirring device 14 is started, and the stirrer rotates and stirs, so that the reactant is subjected to uniform microwave radiation and sufficient chemical reaction.

According to the microwave high-pressure reaction kettle, the circular tube 3 is entered by the antenna 7 of the magnetron 2, the antenna 7 and the circular tube 3 form the coaxial resonant cavity 8, and after the microwave is effectively excited by the microwave excitation device formed by combining the coaxial resonant cavity 8 and the loudspeaker 20, the high-efficiency energy feedback with controllable microwave conduction direction is realized through the conical pressure bearing part 5; optimize the feed-in mouth of the cauldron body for the pipe, the bearing part is optimized to cone bearing part 5, and laminate with loudspeaker 20's inner wall, fix in loudspeaker through wave-transparent mounting 4, cone bearing part 5 is with pressure seal in the cauldron body 1, improve whole microwave and present the sealing strength that can device 9, effectively prevent gas or/and liquid in the reation kettle from leaking from the microwave feed-in mouth, under the controllable circumstances of guaranteeing microwave effective excitation and conduction direction, the very big atress condition of the cauldron body 1 with cone bearing part 5 that has improved, cone bearing part 5 does not expose outside simultaneously, be difficult to damage.

Without the cone bearing part 5, the pressure required by the reaction kettle in working can not be guaranteed. If the horn 20 which is matched and combined with the coaxial resonant cavity according to a certain size is not adopted, but a rectangular or round-bottom test tube type wave-transmitting element is adopted, a microwave excitation device cannot be formed, and therefore microwave excitation and microwave conduction direction control cannot be effectively achieved.

The inner diameter of the circular tube 3 is 5-50mm, preferably 5-30mm, and more preferably 10-20 mm. The waveguide of patent application No. 200610046206.3 has a rectangular cross section of 90 × 45mm, and is equipped with a pressure-bearing glass having a diameter of 120 mm. Meanwhile, due to the rectangular holes, the stress at the right-angle position is easy to concentrate. The aperture of the through hole with the patent application number of 201410471231.0 is 20mm-30mm, which are all far higher than the sectional dimension of the application. The smaller the cross-sectional area of the circular tube 3 is, the stronger the pressure-bearing capacity is. Although the size of the round tube is smaller, the horn 20 arranged in the reaction kettle and the coaxial resonant cavity 8 are matched and combined into a microwave excitation cavity according to a certain size, so that the microwave can be effectively transmitted and controlled, meanwhile, the microwave feed point is moved into the reaction kettle, and the microwave can penetrate to the more central position of the reaction system. More uniform heating of the reaction system is realized, and the promotion influence of the microwave on the reaction is strengthened.

The wavelength of the microwave is 12.24cm at the frequency of 2.45GHz, and the length of the round tube 3 is 1/4-1/2 cm, preferably 3.06-6.12 cm. The cone height of the loudspeaker 20 is 10-100 mm, the caliber is 45-180 mm, the preferred cone height is 20-50 mm, and the caliber is 60-140 mm. In the technical implementation process of the pressing force container with the design specification of patent application No. 200610046206.3, the rectangular openings of 90 × 45mm at 2 and more than 2 positions are difficult to realize on the reaction kettle body with the diameter of 350mm at the same latitude. Meanwhile, the pressure-bearing glass with the diameter of 120mm is allowed to be used, and the allowable use of the reaction kettle is not more than 2.5 mpa. In patent application No. 201410471231, for example, in high voltage equipment, the thickness of the fixed flange surface of the pressure-bearing part and the thickness of the kettle wall need to be more than 10mm, the length of the microwave magnetron antenna is generally between 25-50mm, and in the structure, the exposed length of the antenna and the inner wall of the pressure-resistant waveguide are difficult to form an effective microwave resonant cavity; meanwhile, when microwave conduction is carried out at the rear end of the waveguide, BJ26 (rectangular waveguide, size 86.3X 43.2mm) or BY22 (circular waveguide, size phi 97.9mm) or more is also needed. Taking the reaction kettle body with the diameter of 350mm as an example, the rectangular openings of 90 × 45mm at 2 and more than 2 positions are difficult to realize at the same latitude of the structure. In the application, if 10-20mm circular holes are used for feeding in microwaves, 4 or more than 4 microwave feeding holes can be easily formed in the same latitude under the condition that the stress of the kettle body is not influenced. Meanwhile, the small-size hole is formed, and the processing is simpler and more convenient. The bearing plate is internally arranged, the wave-transmitting fixing piece 4 does not need to be stressed, and compared with the two patents, the fixing piece is simpler and more convenient to process, less in used materials and lighter in weight.

The material of the cone bearing part 5 is at least one of polytetrafluoroethylene, quartz glass, high-purity alumina, high borosilicate glass and PEEK plastic.

Different materials of the cone bearing piece 5 can be selected according to different requirements, so that the bearing capacity of the cone bearing piece 5 is ensured. The material of the cone bearing part 5 can adopt one type of material or adopt a plurality of types of materials to be mutually overlapped.

When quartz glass, high-purity alumina, high borosilicate glass and other materials are used as the material of the cone bearing part 5, a sealing gasket which plays a role in stress buffering is arranged between the cone bearing part 5 and the inner wall of the horn 20 and between the cone bearing part 5 and the wave-transmitting fixing part 4. The material of the sealing gasket 6 is at least one of polytetrafluoroethylene, fluororubber and nitrile rubber.

The wave-transparent fixing piece 4 is a hollow metal flange or a flat plate made of wave-transparent material.

The edge of the horn 20 is provided with a linking flange surface, the cone bearing part 5 is fixed in the horn 20 by linking with the hollow metal flange, the sealing gasket 6 plays a role in sealing and stress buffering, and the hollow metal flange can effectively penetrate through microwaves while fixing the cone bearing part 5.

The microwave energy-feeding devices 9 are uniformly arranged on the kettle body.

The penetration depth of the microwave serving as an energy wave for heating is always a main problem restricting the amplification production of the microwave, the effective penetration depth of the microwave is 3-8cm, and according to the wave absorbing capacity and the handling capacity of materials, a plurality of microwave energy feedback devices 9 are required to be uniformly arranged on a kettle body to realize uniform energy feedback of a microwave high-pressure reaction kettle. Because of using this microwave to present can device 9, cauldron body 1 and pipe 3 welded fastening, the internal diameter of pipe can be as little as 5-30mm, very big improvement cauldron body 1 and microwave present can the pressure-bearing capacity of device 9, even set up a plurality of microwaves on cauldron body 1 and present can device 9, can not increase the pressure design of high-pressure reation kettle and the degree of difficulty of processing yet, equipment can allow to use to higher pressure environment simultaneously. Meanwhile, the microwave feed point is moved into the reaction kettle, the microwave can penetrate to the more central position of the reaction system, the influence of weakened reaction effect caused by the penetration depth of the microwave is reduced, and the reaction kettle with larger size can be arranged in the same reaction system.

The kettle cover 11 and the kettle body 1 are tightly screwed through bolts 10, and a sealing gasket is arranged between the kettle cover and the kettle body. The pressure resistance of the connecting part is good, the sealing performance is good, the microwave leakage is effectively prevented, and the gas tightness of the furnace body and the microwave leakage are guaranteed to be within the allowable range of the national standard.

A feed inlet 16 is formed in the kettle cover 11, a discharge outlet 18 is formed in the bottom of the kettle body 1, and valves 17 are arranged on the feed inlet 16 and the discharge outlet 18.

The feed inlet 16 sets up a plurality ofly, according to practical application's needs, can add multiple material in the cauldron body 1 simultaneously.

And the kettle cover 11 is provided with a pressure measuring device 13, a temperature measuring device 15, a safety valve 12 and an automatic pressure relief electromagnetic valve 19.

The kettle body 1 is also externally provided with a controller for controlling the temperature and pressure in the kettle body.

The kettle body 1 is connected with a pressurizing device.

The pressure measuring device 13 is used for detecting and controlling the pressure of the reaction kettle during working, and because the pressure sensor can be interfered by microwave, a wave suppression device is required to be arranged at the pressure detection position, the wave suppression device can be a metal plate with single holes or densely distributed round small holes to ensure the accuracy of pressure detection, and the pressure measuring device 13 is connected with a controller. The pressure measuring device 13 sends a detection control signal to the controller, and the controller adjusts the pressure in the kettle body by adjusting the valves of the discharge hole and the feed hole.

The temperature measuring device 15 is used for detecting and controlling the temperature of the reaction kettle during working, the temperature measuring device 15 can adopt galvanic couple temperature measurement or infrared temperature measurement, the temperature measuring device 15 is connected with the controller, the temperature measuring device 15 sends a detection control signal to the controller, the controller controls the feed-in microwave power of the magnetron 2 of the microwave energy feedback device 9, the process temperature control of the reaction kettle is realized, and multi-point combined temperature measurement and control can be adopted to ensure the uniformity of a temperature field in the reaction kettle.

Opening the reaction kettle cover 11, adding the reaction materials into the kettle body 1, and after the reaction is finished, hermetically connecting the kettle cover 11 with the kettle body 1, or adding the reaction materials into the kettle body 1 through a feed inlet 16; setting the pressure, temperature and time required by the reaction through a controller; the reaction kettle is pressurized to the required pressure through a pressurizing device, a stirring device 14 is started, a microwave energy feedback device 9 is started, microwaves heat reactants through the microwave energy feedback device 9, a temperature measuring device 15 detects the temperature of the reactants and feeds detection information back to a controller, and the controller adjusts the microwave power; after the temperature and the pressure reach set values and the set time is kept, the controller closes the microwave energy feeding device 9 and the stirring device 14, and heating and stirring are stopped; if the reaction material is liquid, the liquid needs to be cooled to be below 100 ℃, the reactant is discharged from the bottom of the reaction kettle, if the reaction material is solid, cooling is not needed after the reaction is finished, and the reactant can be directly discharged after pressure relief.

When the pressure in the high-pressure reaction kettle exceeds the set pressure, the automatic pressure relief electromagnetic valve 19 is electrified to exhaust, so that the air pressure in the high-pressure reaction kettle is kept in the set pressure range.

In order to ensure safety, a safety valve 12 is arranged on the kettle cover 11, and when the pressure in the high-pressure reaction kettle exceeds the designed pressure, the safety valve 12 automatically pops open.

The detection table is obtained by comparing the pressure resistance, heating performance and the like of reaction kettles with the same microwave frequency, the same size and the like but different pressure-bearing devices.

TABLE 1 Performance test chart of phi 350mm microwave high-pressure reaction kettle

As can be seen from table 1, for the reaction kettles with the same diameter, the pressure-bearing structure of the present invention can significantly reduce the thickness of the pressure-bearing portion, increase the maximum allowable pressure, and increase the heating uniformity of the reaction material due to the increased number of microwave feeding devices arranged at the same latitude (i.e. the same height for the vertical reaction kettles).

Claims

1. A microwave high-pressure reaction kettle is characterized by comprising a kettle body (1), a kettle cover (11) hermetically connected with an opening of the kettle body (1), a stirring device (14) and a microwave energy feedback device (9), wherein the microwave energy feedback device (9) comprises a magnetron (2) and a microwave excitation feed-in pressure-bearing device;

the microwave excitation feed-in pressure-bearing device comprises a round pipe (3) arranged on the kettle body (1), a loudspeaker (20) positioned in the kettle body (1), a cone pressure-bearing piece (5) positioned in the loudspeaker (20) and a wave-transmitting fixing piece (4) for limiting the cone pressure-bearing piece (5) to move;

the antenna (7) of the magnetron (2) is positioned in the circular tube (3), and the antenna (7) and the circular tube (3) form a coaxial resonant cavity (8).

2. A microwave autoclave reactor according to claim 1, characterized in that the inner diameter of the round tube (3) is 5-30mm, and the length of the round tube (3) is 1/4-1/2 of the transmission wavelength of the microwaves.

3. The microwave autoclave reactor according to claim 1, wherein the horn (20) has a cone height of 10 to 100mm and a bore diameter of 45 to 180 mm.

4. A microwave autoclave according to claim 1, 2 or 3, characterized in that the material of the cone pressure-bearing piece (5) is at least one of teflon, quartz glass, high purity alumina, high borosilicate glass, PEEK plastic.

5. The microwave autoclave reactor according to claim 4, wherein a gasket (6) is disposed between the cone pressure-bearing member (5) and the inner wall of the horn (20), and a gasket (6) is disposed between the cone pressure-bearing member (5) and the wave-transparent fixing member (4).

6. The microwave autoclave reactor according to claim 5, wherein the wave-transparent fixing member (4) is a hollow metal flange or a flat plate made of wave-transparent material.

7. A microwave autoclave according to claim 6, characterized in that the microwave energy-feeding devices (9) are uniformly arranged in plurality on the autoclave body (1).

8. A microwave autoclave according to claim 7, characterized in that the kettle cover (11) and the kettle body (1) are fastened by bolts (10), and a sealing gasket is arranged between the kettle cover (11) and the kettle body (1).

9. The microwave high-pressure reaction kettle according to claim 8, further comprising a feeding port (16) and a discharging port (18), wherein the feeding port (16) is arranged on the kettle cover (11), the discharging port (18) is arranged at the bottom of the kettle body (1), both the feeding port (16) and the discharging port (18) are provided with valves (17), and 1 or more feeding ports (16) are arranged.

10. A microwave autoclave reactor according to claim 9,

a pressure measuring device (13), a temperature measuring device (15), an automatic pressure relief electromagnetic valve and a safety valve (12) are arranged on the kettle cover (11);

a controller for controlling the temperature and the pressure in the kettle body (1) is also arranged outside the kettle body (1);

the kettle body (1) is connected with a pressurizing device.