KR101440142B1 - thermal decomposition apparatus with microwave - Google Patents

Abstract

The present invention relates to a dielectric heat pyrolysis gas fired combustion device using microwave which decompose trashes or exhaust gas by a dielectric heating element heated thereby. According to the present invention, the dielectric pyrolysis gas fired combustion device comprises a heating stove body, and an oscillator. The heating stove body comprises a space for pyrolysis; a dielectric heating element heated by microwave; an insulation member covering the dielectric heating element; and a fire resistant tube installed to protect the inner circumference of the dielectric heating element. The oscillator is installed adjacent to the heating stove body to heat the dielectric heating element by oscillating microwave. The heat resistant tube is made of alumina or zirconia.

Description

TECHNICAL FIELD The present invention relates to a thermal decomposition apparatus with microwave,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus, and more particularly, to a dielectric-pyrolytic gasification and combustion apparatus using a microwave for thermally decomposing waste or combustion gas by a brittle heating element heated by microwaves.

Generally, wastes are collectively referred to as waste materials. According to the conventional notion or waste management law, "waste" refers to waste materials such as waste, sludge, waste oil, waste acid, waste alkali, animal carcass, Substances that become unnecessary for industrial activities'.

On the other hand, currently used waste disposal methods include reduction in weight, recycling, reclamation, landfill, and incineration. Among them, weight loss, recycling, and regeneration are not the final waste disposal measures, and landfill is a severe regulatory target in each country because it causes serious soil and water pollution over a long period of time. Therefore, the incineration method is mainly used, which is a method of burning waste by using flame.

However, the waste disposal method by incineration is an incineration method which directly applies flame to the waste, and it is practically impossible to complete combustion due to various factors such as the amount of waste, density, water content, incinerator size, heating temperature, and soot due to incomplete combustion Dust, air pollution, pollutant emission gas, and the like.

In view of this, a method of pyrolysis or carbonization of waste in a high temperature and vacuum environment has been proposed. As a waste disposal apparatus using the proposed method, Korean Patent Registration No. 0019679 discloses a method of pyrolysis of waste using a pyrolysis apparatus, Patent Publication No. 0777616 discloses a low temperature pyrolysis apparatus of a high carbon- Patent No. 0375569 discloses a pyrolysis device for polymer waste.

The waste treatment apparatus using the pyrolysis requires a process of forming / maintaining the inside of the pyrolysis furnace in a vacuum in the pyrolysis process, and thus the entire apparatus is excessively complicated by providing the pyrolysis temperature control apparatus heated to the high temperature .

On the other hand, the carbonization apparatus for industrial waste has been disclosed in Patent Publication No. 1994-06872, and the incineration plant for waste carbonization is disclosed in Patent Publication No. 787948, and the thermal rotary carbonization apparatus for carbonizing organic waste is disclosed. 0372775 discloses a waste carbonated incinerator.

Since such a carbonization apparatus uses gas, fossil fuel, etc. as a heat source, it requires a relatively large maintenance cost, and the structure is relatively complicated.

Patent Registration No. 0019679: Pyrolysis method of waste using pyrolysis device Patent Registration No. 0777616: Low Temperature Pyrolysis Apparatus for High Carbonization Industrial Waste Patent No. 0375569: Pyrolysis apparatus for polymer waste Patent Publication No. 1994-06872: Waste Carbonization Incinerator Patent Registration No. 787948: Rotary carbonization furnace for organic waste carbonization Patent Registration No. 0372775: Waste Carbon Burner

The present invention provides a dielectric heating pyrolysis and gasification combustion apparatus using a microwave capable of pyrolyzing waste or combustion gas by using a main body of a heat generating furnace made of a dielectric heating body that generates heat by microwave It has its purpose.

Another object of the present invention is to provide a heat-resistant tube made of alumina or zirconia on the inner circumferential surface of a dielectric heating element to protect the dielectric heating element when the main body is heated by heat generation, thereby increasing the durability of the dielectric heating element, Which is capable of maximizing the pyrolysis effect by heating the pyrolysis gasification combustion apparatus.

According to an aspect of the present invention, there is provided a device for pyrolysis and gasification combustion using a microwave, the pyrolysis and gasification combustion apparatus comprising: a dielectric heating body which generates heat by microwave; a heat insulating material surrounding the dielectric heating body; And a microwave oscillator installed adjacent to the heat generating furnace body to generate heat of the dielectric heating body, wherein the heat resistant tube is formed of alumina or zirconia do.

The heat-resistant tube has a length longer than that of the dielectric heat-generating body so as to protrude forward and rearward of the dielectric heat-generating body. In order to prevent the dielectric heat-generating body from being contacted with external air and being oxidized, The heat generating furnace body further includes a frame surrounding the heat insulating material. The heat generating furnace body is installed at one side of the heat generating furnace body to supply an inert gas into the frame, And a gas tank for preventing inflow of outside air into the heat insulating space inside the frame provided with the heat insulating material and preventing the oxidation of the dielectric heating body.

A pressure side is provided on one side of the main body of the heat generating furnace so as to prevent the pressure inside the frame from rising to a certain level or more due to expansion of the volume of the inert gas supplied to the main body of the heat generating furnace .

And a vortex inducing member provided inside the heat-resistant tube for guiding a gas to be pyrolyzed passing through the pyrolysis space to the inner circumferential surface of the heat-resistant tube to induce vortex and turbulent flow of the gas to be pyrolyzed in the pyrolysis space .

Wherein the heat generating tube has a plurality of through holes through which the object to be thermally decomposed passes, the heat insulating tube being inserted into each of the through holes, and the heat resistant tube being relatively in contact with the through hole, A caster ball which is formed on the outer side of the caster ball and which is formed on the outer side of the caster ball and protrudes forward and rearward of the dielectric heating element and surrounds the protrusion of the protruded dielectric heating element; And a packing member for blocking external air from flowing into the dielectric heating element.

Wherein the heat generating furnace body is formed with an exhaust portion communicating from the pyrolysis space formed inside the heat-resistant tube to the outside of the heat-generating furnace body to exhaust gas generated in the pyrolysis process, and at the other side of the heat- The pyrolysis target waste disposed in the pyrolysis space and introduced into the main body of the pyrolysis furnace through a charging unit formed at one side of the pyrolysis furnace body, And a gas combustion unit connected to the exhaust unit for burning the gas discharged through the exhaust unit.

The microwave-assisted pyrolysis and gasification combustion apparatus using a microwave according to the present invention uses a microwave to generate heat generated by a main body of a heat generating furnace including a dielectric heating element, thereby using the microwave as a heat source. The temperature of the main body can be raised to an ultra-high temperature to pyrolyze various kinds of wastes.

In addition, by protecting the dielectric heating element through the heat-resistant tube and filling the outside of the dielectric heating element with an inert gas, oxidation of the dielectric heating element can be prevented, and the service life of the device can be increased.

1 is a partially cutaway perspective view showing a first embodiment of a dielectric-pyrolytic gasification combustion apparatus using microwave according to the present invention,
FIG. 2 is a cross-sectional view of a dielectric-pyrolytic gasification combustion apparatus using the microwave of FIG. 1,
FIG. 3 is a perspective view showing another embodiment in which the heat-resistant tube and the dielectric heating element are formed to have a rectangular cross-sectional shape in the dielectric-heated pyrolysis and gasification combustion apparatus using the microwave of the first embodiment,
FIG. 4 is a cross-sectional view showing another embodiment in which a heat-resistant tube is formed to extend in a waveform in the dielectric-heated pyrolysis and gasification combustion apparatus using microwave of the first embodiment;
5 is a cross-sectional perspective view showing a second embodiment of a dielectric-pyrolytic gasification combustion apparatus using microwave,
FIG. 6 is a cross-sectional view of a dielectric-pyrolytic gasification combustion apparatus using the microwave of FIG. 5,
FIG. 7 is a side sectional view showing a third embodiment of a dielectric-pyrolytic gasification combustion apparatus using microwave according to the present invention,
FIG. 8 is a front sectional view of the dielectric-pyrolytic gasification and combustion apparatus using the microwave of FIG. 7; FIG.

Hereinafter, a microwave-assisted dielectric pyrolysis and gasification combustion apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show a first embodiment of a dielectric-pyrolytic gasification and combustion apparatus 10 using a microwave.

Referring to FIG. 1, a microwave-assisted dielectric pyrolysis and gasification and combustion apparatus 10 includes a main body 100 with a heating furnace, a plurality of oscillators 200 installed outside the main body 100 of the heating furnace 100, A gas tank 300 for supplying an inert gas to the heat generating furnace 100, a pressure side 310 for maintaining the pressure inside the heat generating furnace main body 100 at a predetermined level, And a vortex inducing member 400 for guiding a vortex of the gas to be pyrolyzed.

The heat generating furnace body 100 includes a frame 110 having a hexahedral shape having an internal space, a heat insulating material 120 disposed inside the frame 110, and a dielectric heating body 120 disposed inside the heat insulating material 120 130 and a heat-resistant tube 140 installed inside the dielectric heating body 130.

The heat insulating material 120 is composed of an internal heat insulating material 121 and an external heat insulating material 123. The external heat insulating material 123 has a hexahedron shape outside in correspondence with the shape of the frame 110, Respectively.

The inner heat insulating material 121 is installed in the hollow of the external heat insulating material 123. The inner heat insulating material 121 is also hollowed inside. A mounting groove 122 is formed in the hollow inner circumferential surface of the inner heat insulating member 121 at a position spaced from the front end and the rear end toward the outer circumferential surface of the inner heat insulating member 121. The mounting groove 122 is provided with a dielectric heating body 130 are installed.

The dielectric heating body 130 has a size and shape that can be inserted into the mounting groove 122 and an inner diameter of the inner circumferential surface is formed to correspond to an inner diameter of the inner heat insulating material 121 in which the mounting groove 122 is not formed . The dielectric heating body 130 is heated by a microwave oscillated from a later-described oscillator 200 to raise the temperature of the pyrolysis space to 500 to 1600 ° C. As the temperature of the pyrolysis chamber increases due to the dielectric heating body, And then discharged.

A heat-resistant tube 140 is disposed inside the dielectric heating body 130. The heat-resistant tube 140 prevents oxidation of the dielectric heating body. When the dielectric heating body is raised by the microwave of the oscillator 200 and comes into contact with air, oxidation progresses at a contact portion in contact with air, The service life of the sieve is rapidly deteriorated. Therefore, the heat-resistant tube 140 formed using alumina or zirconia, which is a heat-resistant material capable of withstanding an ultra-high temperature, is installed inside the dielectric heating body 130 to withstand the high temperature of the pyrolysis space and the inner side of the dielectric- .

The heat-resistant tube 140 is relatively longer than the dielectric heating body, and the outer circumferential surface extends in the front-rear direction along the inner circumferential surface of the dielectric heating body and the inner circumferential surface of the inner heat-

A packing member 150 is provided at the front end and the rear end of the heat-resistant tube 140, respectively. The packing member 150 is installed at the front and rear ends of the heat-resisting tube 140. The packing member 150 includes a first packing portion 151 provided at the end of the heat-resisting tube 140, And a second packing portion 152 which is formed of a metal.

The first packing part 151 is ring-shaped and made of a heat-resistant material, and an inlet groove is formed on the inner circumferential surface side so that the end of the heat-resistant tube 140 can enter the inside. Accordingly, the first packing 151 covers the front and rear surfaces of the heat-resistant tube 140 and a part of the outer circumferential surfaces of the front and rear ends. The second packing part 152 is made of a metal material that encloses the end surface and the outer surface of the first packing part 151 and presses the front surface and the rear surface of the second packing part 152 and the inner heat insulating material 121 Installation is done.

The first packing part 151 and the second packing part 152 are installed at both ends of the heat-resistant tube 140 and the end of the internal heat-insulating material 121 at both ends in the longitudinal direction, The external air flows into the space between the first and second heat generating units 121 and 121, thereby preventing the outside of the dielectric heating unit 130 from being oxidized.

The first packing part 151 is preferably formed in the form of a water jacket capable of circulating water so as to increase the heat resistance of the dielectric heating body 130 and the heat resistant tube 140 which are heated to a high temperature.

An inert gas such as nitrogen or argon is filled in the gas tank 300 and an inert gas is supplied to the gas tank 300 through a heat insulating space in which the heat insulating material 120 is installed inside the frame 110.

Since the dielectric heating body 130 is heated to a high temperature, the insulating space contacting the dielectric heating body 130 is filled with the inert gas to prevent the danger of gas explosion. When the inert gas is filled in the heat insulating space, It is possible to expect an effect of blocking the inflow.

A pressure side 310 for adjusting the pressure of the heat insulating space is installed at one side of the frame 110. As described above, inert gas is filled in the heat insulating space. When the temperature of the heat insulating space increases as the dielectric heating body 130 is heated, the volume of the inert gas expands and the pressure of the heat insulating space rises. Accordingly, when the pressure side 310 is installed on one side of the frame 110 and the pressure of the heat insulating space rises to a certain level or higher, inert gas in the heat insulating space is discharged to the outside to maintain the pressure of the heat insulating space at a certain level.

The vortex guiding member 400 is for guiding a vortex to the gas to be pyrolyzed which has flowed into the pyrolysis space. The vortex guiding member 400 includes an extension rod 410 extending in the longitudinal direction of the heat resistant tube 140 and a plurality of screw cones (420). The screw cone 420 is formed in a cone shape having an outer diameter gradually increasing as it extends from the front to the rear along the moving direction in which the gas to be pyrolyzed moves, and a guide portion in the spiral direction is formed on the outer circumferential surface, And moves along the spiral direction toward the inner circumferential surface side of the heat-resistant tube 140 by the screw cone 420, thereby increasing the residence time in the pyrolysis space and enhancing the pyrolysis effect of the gas.

In this embodiment, both the heat-resisting tube 140 and the dielectric heating body 130 are formed in a cylindrical shape. However, as shown in FIG. 3, the dielectric heating body 130 and the heat-resisting tube 140 may be formed in a square column shape The vortex guiding member 400 may also include an extension plate 430 extending along the longitudinal direction and a plurality of inclined guide members 440 spaced along the longitudinal direction of the extension plate 430 .

The inner circumferential surface of the dielectric heating body 130 and the heat-resistant tube 140 may be formed to extend in a waveform along the moving direction in which the gas to be pyrolyzed moves as shown in FIG. When the inner circumferential surface of the heat-resistant tube 140 and the dielectric heat-generating body 130 are formed in a corrugated shape, the gas to be pyrolyzed is collided with the inner wall of the heat-resistant tube 140, The staying time for staying is increased, and the installation of the vortex guiding member 400 can be omitted.

The heat-resistant tube 140 and the dielectric heating body 130 may be triangular or other prism-shaped in addition to the embodiments shown in FIGS. 1 to 4, if necessary.

5 and 6 show a second embodiment of a dielectric-pyrolytic gasification and combustion apparatus 10 using a microwave.

The pyrolysis gasification and combustion apparatus 10 according to the present embodiment uses a microwave to pyrolyze a large amount of gas by forming a plurality of pyrolysis spaces through which a gas to be pyrolyzed moves.

In the present embodiment, the dielectric heating body 130 is formed with a plurality of through holes 131 passing through the front and rear ends along the longitudinal direction, and each of the through holes 131 provides a pyrolysis space.

A heat-resistant tube 140 is inserted into the through-hole 131. The heat-resisting tube 140 is made of alumina or a zirconia tube as in the previous embodiment. The heat-resistant tube 140 has a relatively long length as compared with the dielectric heating body 130. The front end and the rear end of the heat-resistant tube 140 protrude forward and rearward of the dielectric heating body 130, Respectively. An auxiliary insulating material 120 is installed between the caster ball 160 and the dielectric heating body 130 so as to surround the heat resistant tube 140 to prevent the heat of the dielectric heating body 130 from leaking to the outside.

A packing member 150 is further installed on the outer side of the caster ball 160. The packing member 150 is installed along the edge of the caster ball 160 and presses the caster ball 160 toward the bare heating body so that the gap between the dielectric heating body 130 and the heat insulating material 120 or the heat resistant tube 140 Thereby blocking external air from entering the space.

The packing member 150 is composed of a first packing part 151 and a second packing part 152 as in the first embodiment, so that airtightness is maximized.

The gas tank 300 for supplying the inert gas to the heat insulating space provided with the heat insulating material 120 and the pressure side 310 for maintaining the pressure of the heat insulating space at a constant level are provided, Thereby preventing the dielectric heating body 130 from being oxidized by heating.

7 and 8 show a third embodiment of a dielectric-pyrolytic gasification and combustion apparatus 10 using a microwave.

In the microwave-assisted dielectric heating pyrolysis and gasification and combustion apparatus 10, two heat-resistant tubes 140 are disposed adjacent to a dielectric heating body 130. The dielectric heat-generating body 130 and the two heat- The constitution of the heat insulating material 120 and the packing member 150 is the same as that of the first embodiment.

In addition, in this embodiment, the transfer screw 170 is installed inside the heat-resistant tube 140 so that the waste to be pyrolyzed can be transferred in the pyrolysis space. The conveying screw 170 is made of a heat-resistant material capable of withstanding the ultra-high temperature in the pyrolysis space, and is driven by the conveying motor 171.

A heat exhaust part 180 is formed at one side of the main body 100 for discharging gas generated in a pyrolysis process of waste in a pyrolysis space. The exhaust unit 180 is connected to the gas combustion unit 500 so that the gas generated in the pyrolysis unit 500 flows into the gas combustion unit 500. The gas combustion unit 500 burns and discharges the introduced combustion gas.

The gas combustion unit 500 includes a combustor body 510 connected to the exhaust part 180 and having a heating space part 511 for heating gas and a combustion part 512 for burning gas. An air supply pipe 520 for supplying air to the combustion unit 512 through the heating space 511 is provided in the main body 510 of the combustor body and a nozzle A portion 521 is formed. An electrode 530 for generating a glow discharge plasma is provided at an end of the nozzle portion 521 of the air supply pipe 520. A flame injection opening 540 is formed in the main body 510 corresponding to the nozzle portion 521, Respectively. In addition, a guide portion for guiding the swirling flow of the gas introduced into the combustor body 510 may be formed on the inner circumferential surface of the combustor main body 510.

A discharge unit 181 is formed at the rear end of the main body 100 through a heat generating unit so that waste residues pyrolyzed while passing through the pyrolysis space can be discharged. A collection box 182 is installed in the discharge unit 181 have. The residues of the waste can be collected in the collection box 182 and then transported to a separate treatment facility or pyrolyzed to be treated.

Although not shown in the present embodiment, a separate auxiliary connecting means for connecting the collection box 182 and the gas processing unit or the exhaust unit 180 to treat the gas generated from the residues remaining in the collection box 182 is further provided .

The microwave-assisted pyrolysis and gasification combustion apparatus 10 according to the present invention includes the dielectric heating body 130 heated by the microwave oscillating oscillator 200 and the dielectric heating body 130 The heat insulating tube 140 and the packing member 150 are installed to prevent the inside and the outside from being oxidized by contact with the air and the inert gas is filled in the inner space of the heat generating furnace body 100, It is possible to stably maintain the inside of the heat insulating space while blocking the inflow of outside air.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10; Microwave-assisted dielectric heating pyrolysis gasification combustion device
100; Body with heat
110; Frame 120; insulator
121; Internal insulation 122; Mounting groove
123; External insulation 130; Dielectric heating element
131; Through hole 140; Heat-resistant tube
150; A packing member 151; The first packing portion
152; A second packing part 160; Castor Ball
170; Conveying screw 171; Feed motor
180; An exhaust part 181; The discharge portion
182; Collection box
200; oscillator
300; Gas tank
310; Pressure variable
400; Vortex guiding member
410; An extension rod 420; Screw cone
430; An extension plate 440; The inclined guide member
500; Gas combustion unit
510; Combustor body 511; The heating space part
512; Combustion unit 520; Air supply pipe
521; Nozzle unit 530; electrode
540; Flame nozzle

Claims (9)

delete A heat generating furnace body including a dielectric heating body that forms a pyrolysis space and generates heat by microwaves, a heat insulating material surrounding the dielectric heating body, and a heat resistant tube installed to protect an inner circumferential surface of the dielectric heating body;
And an oscillator installed adjacent to the heating furnace body to generate microwave to generate heat of the dielectric heating element,
The heat-resistant tube is formed of alumina or zirconia,
The heat-resistant tube has a length longer than that of the dielectric heat-generating body so as to protrude forward and rearward of the dielectric heat-generating body. In order to prevent the dielectric heat-generating body from being contacted with external air and being oxidized, Wherein a packing member for blocking air from entering is formed on the inner surface of the pyrolysis gasification burner. A heat generating furnace body including a dielectric heating body that forms a pyrolysis space and generates heat by microwaves, a heat insulating material surrounding the dielectric heating body, and a heat resistant tube installed to protect an inner circumferential surface of the dielectric heating body;
And an oscillator installed adjacent to the heating furnace body to generate microwave to generate heat of the dielectric heating element,
The heat-resistant tube is formed of alumina or zirconia,
Wherein the heat generating furnace body further includes a frame surrounding the heat insulating material,
A gas tank installed on one side of the main body of the heat generating furnace to supply an inert gas into the frame to block the inflow of outside air into the heat insulating space inside the frame provided with the heat insulating material and to prevent the oxidation of the dielectric heating body Wherein the pyrolysis gasification burner is a pyrolysis gasification burner. The method of claim 3,
A pressure side is provided on one side of the main body of the heat generating furnace so as to prevent the pressure inside the frame from rising to a certain level or more due to expansion of the volume of the inert gas supplied to the main body of the heat generating furnace Wherein the pyrolysis gasification burner is a pyrolysis gasification burner. A heat generating furnace body including a dielectric heating body that forms a pyrolysis space and generates heat by microwaves, a heat insulating material surrounding the dielectric heating body, and a heat resistant tube installed to protect an inner circumferential surface of the dielectric heating body;
And an oscillator installed adjacent to the heating furnace body to generate microwave to generate heat of the dielectric heating element,
The heat-resistant tube is formed of alumina or zirconia,
And a vortex inducing member provided inside the heat-resistant tube for guiding a gas to be pyrolyzed passing through the pyrolysis space to the inner circumferential surface of the heat-resistant tube to induce vortex and turbulent flow of the gas to be pyrolyzed in the pyrolysis space Wherein the pyrolysis gasification burner is a pyrolysis gasification burner. A heat generating furnace body including a dielectric heating body that forms a pyrolysis space and generates heat by microwaves, a heat insulating material surrounding the dielectric heating body, and a heat resistant tube installed to protect an inner circumferential surface of the dielectric heating body;
And an oscillator installed adjacent to the heating furnace body to generate microwave to generate heat of the dielectric heating element,
The heat-resistant tube is formed of alumina or zirconia,
Wherein the dielectric heating body is formed with a plurality of through holes through which the object to be thermally decomposed passes, the heat resistant tube being inserted into each of the through holes,
The heat-resistant tube is relatively long compared to the length of the through-hole, and protrudes forward and rearward of the dielectric heating element,
A caster ball provided on the outer side of the auxiliary insulating material; a packing member provided on the outer side of the caster ball to block external air from flowing into the dielectric heating element; Further comprising a microwave-assisted pyrolysis gasification combustion apparatus. A heat generating furnace body including a dielectric heating body that forms a pyrolysis space and generates heat by microwaves, a heat insulating material surrounding the dielectric heating body, and a heat resistant tube installed to protect an inner circumferential surface of the dielectric heating body;
And an oscillator installed adjacent to the heating furnace body to generate microwave to generate heat of the dielectric heating element,
The heat-resistant tube is formed of alumina or zirconia,
Wherein the heat generating furnace body is formed with an exhaust portion communicating from the pyrolysis space formed inside the heat-resistant tube to the outside of the heat-generating furnace body to exhaust gas generated in the pyrolysis process, and at the other side of the heat- A discharge unit for discharging the residue of the waste formed in the process of passing through the discharge port,
Further comprising a transfer unit installed in the pyrolysis space for transferring the pyrolysis target waste charged into the furnace body through a charging unit formed at one side of the furnace body to the discharging unit side, Pyrolysis gasification combustion device. 8. The method of claim 7,
Further comprising: a gas combustion unit connected to the exhaust unit to burn gas discharged through the exhaust unit. A heat generating furnace body including a dielectric heating body that forms a pyrolysis space and generates heat by microwaves, a heat insulating material surrounding the dielectric heating body, and a heat resistant tube installed to protect an inner circumferential surface of the dielectric heating body;
And an oscillator installed adjacent to the heating furnace body to generate microwave to generate heat of the dielectric heating element,
The heat-resistant tube is formed of alumina or zirconia,
Wherein the inner circumferential surface of the dielectric heating body is formed so as to extend along a longitudinal direction thereof and the heat resistant tube is formed to extend in a waveform corresponding to the inner circumferential surface shape of the dielectric heating body.

Images