KR102222440B1 - Heating apparatus using microwave and thermal desorption system using the same - Google Patents

Abstract

Disclosed are a microwave heating device and a thermal desorption treatment system using the same.
A microwave heating device according to an embodiment of the present invention includes: an oscillator for generating a microwave; A waveguide that receives the microwave generated from the oscillation unit and moves along the inside; And a heating element that receives and heats the microwave of the waveguide.

Description

A microwave heating device and a thermal desorption treatment system using the same

The present invention relates to a microwave heating device and a thermal desorption treatment system using the same, and more particularly, to a microwave heating device capable of generating microwaves and generating heat using the same, and a thermal desorption treatment system using the same.

The interest in environmental pollution prevention was mainly focused on water and air purification, and unlike air or water, even if the soil is contaminated, its effect does not appear within a short period of time, so it has received relatively little attention, but the US military units whose return was decided recently were stationed. Problems such as oil pollution caused by underground oil storage facilities, such as in the region, are being discussed recently.

In general, the leakage of oil substances mainly caused by underground oil storage facilities, industries related to petrochemical plants, and illegal landfill disposal of other oil pollutes the soil, which is the basis for survival of all terrestrial ecosystems including humans. Soil pollution is defined as a condition that damages human health or the environment due to reasons such as being discarded on the surface or underground of wastes caused by human activities. Although it does not appear, once it becomes contaminated, the soil itself becomes unusable, and the contamination spreads to groundwater and nearby rivers, causing adverse effects on the ecosystem.

The technology for purifying such oil-polluted soil can be largely divided into biological methods and physicochemical methods. The physicochemical method has a short recovery period but a high treatment cost and a disadvantage that can cause secondary environmental pollution. The biological method is a method of decomposing and removing oil using microorganisms, which are petroleum hydrocarbon decomposing strains, and has a disadvantage in that it takes a long time to restore contaminated soil.

Therefore, in order to solve the problems of the conventional soil pollution purification technology as described above, interest in thermal desorption technology for vaporizing pollutants by applying heat to polluted soil is increasing in recent years. In order to apply the thermal desorption technology to contaminated soil, a method of heating contaminated soil is a problem. Conventionally, the contaminated soil is heated with a heating rod including a heating coil to perform a thermal desorption treatment process. However, in this case, it was difficult to transport and install the heating rod in the field due to the large volume of the heating rod, and there were problems such as low energy efficiency because heat energy was generated through the heating coil.

Unexamined Patent Publication No. 10-2011-0031994 (published on December 23, 2011)

Accordingly, the present invention has been proposed to solve the above problems, and an object of the present invention is to provide a heat generating device with high energy transfer efficiency and miniaturization of a heating device by using a microwave as an energy transfer means. will be.

In addition, another object of the present invention is to provide a thermal desorption treatment system capable of more easily performing a thermal desorption treatment process for contaminated soil through a heating device capable of miniaturization and high energy transfer efficiency.

In order to achieve the above object, a microwave heating device according to an aspect of the present invention includes: an oscillation unit for generating a microwave; A waveguide that receives the microwave generated from the oscillation unit and moves along the inside; And a heating element that receives and heats the microwave of the waveguide.

In addition, the waveguide may be provided with a material capable of blocking microwaves.

In addition, the waveguide may be provided with a material including SUS (Steel Use Stainless).

In addition, the waveguide may include a slit through which an inner microwave can be emitted to the outside.

In addition, the waveguide is connected to one side of the oscillation portion, the connection portion for receiving a microwave from the oscillation portion; And a body portion for receiving the microwave generated by the oscillation portion through the connection portion, wherein the heating element may be provided to surround the outside of the body portion.

In addition, the main body portion may include a slit capable of emitting an internal microwave to the outside.

In addition, the main body portion may be provided in the form of a tube (管) closed at one end.

In addition, the heating element may be provided with a constant thickness in the range of 5 cm or more and 10 cm or less.

In addition, the heating element may be provided in a form in which the thickness of a specific portion is different from that of other portions.

In addition, the heating element may be provided with a material including an Fe-Cr-Al-based alloy or an Fe-Cr-Al-based alloy.

In addition, the heating element may include an Fe-Cr-Al alloy of quenched steel slag particles having a particle size of 5.0 mm or less and a sphericity of 0.5 or more as a material.

In addition, it may include a steel pipe provided in a form surrounding the heating element outside the heating element.

In addition, a plurality of oscillation units may be provided, and the plurality of oscillation units may be connected to one side of the waveguide.

In addition, a plurality of oscillation units may be provided, and one or more oscillation units may be connected to both ends of the waveguide.

In addition, a temperature sensor provided around the heating element to measure the temperature of the heating element; And a control unit for receiving temperature information of the heating element from the temperature sensor and controlling the temperature of the heating element.

In addition, a power supply unit for supplying power to the oscillation unit may be further included, and temperature control of the heating element by the control unit may be performed by the control unit controlling the power unit.

In addition, the power supply unit includes a switch, and temperature control of the heating element by the control unit may be performed by the control unit controlling the switch.

On the other hand, the thermal desorption treatment system using a microwave heating device according to an aspect of the present invention, the microwave heating device of any one of the above claims 1 to 17; And a storage unit into which the microwave heating device is inserted.

In addition, insulators may be installed on the inner wall and floor in the storage unit.

In addition, the storage unit includes an intake unit for absorbing vaporized pollutants generated during the thermal desorption process and discharging them to the outside; And a moisture discharging device for discharging moisture generated during the thermal desorption treatment process to the outside.

According to an exemplary embodiment of the present invention, by generating a microwave and using it as an energy source for generating heat, it is possible to reduce the size of the heating device.

In addition, since it is possible to control the amount of heat generated by preventing random leakage of microwaves and controlling the generation of microwaves, it is possible to effectively and effectively control the amount of heat generated.

In addition, since the microwave heating device is provided in the form of a rod, it is convenient to move and install, and it is excellent in economy by reducing transportation and installation costs.

In addition, an efficient thermal desorption treatment process can be easily performed by performing thermal desorption treatment on contaminated soil by inserting a microwave heating rod into the warm storage unit.

1 is a view showing a microwave heating device for explaining a first embodiment of the present invention.
2 is a view showing a cross section of the microwave heating device according to the first embodiment of the present invention.
3 is a view for explaining a microwave heating device according to a second embodiment of the present invention.
4 is a view showing a microwave heating device to explain a third embodiment of the present invention.
5 is a diagram showing a microwave extinguishing device for explaining a fourth embodiment of the present invention.
6 is a view for explaining a thermal desorption system using a microwave heating device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, only these embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the technical field to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention. The same reference numerals are used for the same names throughout the specification. In addition, terms used in the present specification are for describing exemplary embodiments, and are not intended to limit the present invention. In the present specification, the singular form also includes the plural form in some cases unless specifically stated in the phrase. As used herein, “comprises” and/or “comprising” do not exclude the presence or addition of one or more other elements other than the mentioned elements. Unless otherwise defined, all terms used in the present specification may be used with meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically. Other advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

FIG. 1 is a view showing a microwave heating device to describe a first embodiment of the present invention, and FIG. 2 is a view showing a cross section of the microwave heating device.

The microwave heating device 11 according to the embodiment of the present invention includes an oscillation unit 110, a heating element 111, and a waveguide 112.

The oscillation unit 110 generates microwaves. The oscillation unit 110 may include a magnetron, which is a device that generates microwaves by using an action of a magnetic field on moving electrons.

The waveguide 112 accommodates microwaves generated by the oscillation unit 110. The microwave generated in the oscillation unit 110 moves along the inside of the waveguide 112.

The waveguide 112 may be provided with a material capable of blocking microwaves so that the microwaves do not randomly leak to the outside, and more preferably may be provided with a material including SUS (Steel Use Stainless).

The waveguide 112 may include a slit 113 through which internal microwaves may be emitted to the outside. When the waveguide 112 is provided with a material capable of blocking microwaves, the microwave generated by the oscillation unit 110 stays in the waveguide 112 to prevent energy leakage due to random emission of microwaves while preventing the number of slits. , Since the microwave is constantly emitted to the outside according to the location, etc., the amount of heat generated by the heating element 111 can be controlled by adjusting the amount of microwave generated by the oscillation unit 110.

The waveguide 112 may extend from one side of the oscillation unit 110 in various shapes such as a spherical shape, a polyhedron shape, and a wave shape, and may also be provided in the shape of a tube. When the waveguide 112 is in the shape of a tube, its cross section may be provided in various shapes such as a circle, a triangle, a square, a pentagon, and a hexagon. More preferably, the waveguide 112 may be provided in the form of a round rod.

When the waveguide 112 is in the form of a tube, it is preferable that the length is provided in a length of 1 m or more and 5 m or less.

The waveguide 112 includes a connection portion 1121 and a body portion 1123.

The connection part 1121 is connected to one side of the oscillation part 110 to receive a microwave from the oscillation part 100. The connection part 1121 connects the oscillation part 110 and the body part 1123. The microwave generated from the oscillation part 100 moves to the main body 1123 through the connection part 1121. It is preferable that the connection part 1121 is provided in the form of a tube with both sides open.

The main body 1123 accommodates the microwave moved through the connection 1121. The microwave accommodated in the main body 1123 moves along the main body 1123. The body portion 1123 may be provided to surround the outside of the heating element 111 so that the heating element 111 can easily accommodate the microwave of the body portion 1123.

It is preferable that the main body 1123 is provided in a form in which a portion coupled to the connection portion 1121 is open and the remaining portion is closed. When the inside of the waveguide 112 is closed as described above, the microwave provided from the oscillation unit 110 continues to move inside the waveguide 112, thereby increasing energy efficiency. More preferably, the body portion 1123 is provided in the form of a tube with one end closed, and may be provided in the form of a round rod (棒, pole). In addition, the entire coupling portion 1121 and the body portion 1123 may be provided in the form of a round rod (棒, pole).

The main body 1123 may include a slit 113. The microwave moving along the inside of the main body 1123 may be discharged to the outside through the slit 113 to move to the heating element 111.

One microwave heating device 11 may be provided with a plurality of waveguides 112 as necessary.

The heating element 111 receives microwaves from the waveguide 112. The heating element 111 is heated using the energy of microwaves received from the waveguide 112. When the heating element 111 is heated, radiant heat may be generated from the heating element 111. By using the radiant heat generated from the heating element 111, the contaminated soil in the vicinity may be thermally desorptive.

The heating element 111 is provided to be adjacent to the waveguide 112 so that microwaves from the waveguide 112 are easily received, and more preferably, may be provided to be in close contact with the waveguide 112. Therefore, the shape of the heating element 111 is determined according to the shape of the waveguide 112, and when the waveguide 112 is in the shape of a tube as shown in FIGS. 1 and 2, the heating element 111 is the waveguide 112 It can be provided in the form of a tube (管) surrounding the. The heating element 111 may be provided to surround the outside of the main body 1123. When the waveguide 112 or the body portion 1123 is in the shape of a round rod, the heating element 111 may also be provided in the shape of a round rod.

When the waveguide 112 and the heating element 111 are in the form of a round rod, the overall shape of the microwave heating device 11 may be provided in the form of a round rod. If the microwave heating device 11 is provided in the form of a round rod, more microwave heating devices 11 can be loaded in the same space and can be loaded in a form that can alleviate the impact, so there is less damage during transportation and the transportation cost is reduced. Can be saved. In addition, when the microwave heating device 11 is provided in the form of a round rod, it is easy to grip and thus installation is convenient.

When a plurality of waveguides 112 are provided, the heating element 111 may be provided to surround the entire plurality of waveguides 112.

The heating temperature of the heating element 111 is preferably maintained in the range of 400°C or more and 800°C or less. In this case, the heating element 111 may be provided with a thickness of 5 cm or more and 10 cm or less. The heating element 111 may be provided with a predetermined thickness in a range of 5 cm or more and 10 cm or less.

Meanwhile, the heating element 111 may be provided in a form in which a thickness of a specific portion is different from that of another portion. As the thickness of the heating element 111 is thicker, heat is generated at a high temperature. When the thickness of the specific part is thicker than other parts, heat generated at a high temperature is generated compared to other parts, and if the thickness of the specific part is thin, heat generated at a low temperature.

The heating element 111 is preferably made of a material that has high electrical resistance and is stable even at high temperatures so that heat can be more efficiently generated from the microwaves that are accommodated. The heating element 111 may be provided as a by-product (Fe-Cr-Al-based alloy) containing a large amount of iron, or may be provided as a material including the same. By-products containing a large amount of iron (Fe-Cr-Al alloys) are binders on quenched steel slag particles with a particle size of 5.0 mm or less and a sphericity of 0.5 or more, or quenched steel slag particles with a particle size of 5.0 mm or less and a sphericity of 0.5 or more It is preferable to include any one or more of the cured product cured by mixing. When the heating element 111 is provided with the rapid cooling steel slag particles of the particle size and sphericity, the energy efficiency of the heating element 111 may be further increased.

The microwave heating device 11 according to the embodiment of the present invention may include a steel pipe 114. The steel pipe 114 is provided in a form surrounding the heating element 111 outside the heating element 111 to protect the waveguide 112 and the heating element 111. The steel pipe 114 is preferably made of a material having high thermal conductivity so that heat generated by the heating element 111 can be effectively transferred to the surroundings. In addition, it is preferable that the steel pipe 114 is made of a material having high strength so as to protect the waveguide 112 and the heating element 111. The steel pipe 114 may be provided with metals such as iron, copper, nickel, cobalt, tin, cadmium, zinc, etc. having high thermal conductivity and high strength, or a material containing these metals.

3 is a view for explaining a microwave heating device according to a second embodiment of the present invention. In the second embodiment of the present invention, only differences in comparison with the above-described embodiments will be described, and the same parts will be omitted by replacing with the above description. In addition, among the components of other exemplary embodiments of the present invention, those that have the same function as the above-described parts are denoted by the same reference numerals as the above-described examples.

The microwave heating device 11 according to the second embodiment of the present invention includes a plurality of oscillation units 110, a waveguide 112, and a heating element 111.

The plurality of oscillation units 110 are connected to one side of the waveguide 112. Each of the plurality of oscillation units 110 may generate microwaves having the same or different characteristics such as phase and wavelength.

The connection part 1121 is coupled to one side of each of the plurality of oscillation parts 110 to receive microwaves from each oscillation part 110. The connection part 1121 coupled to each oscillation part 110 may extend in the shape of each tube and may be provided in the form of gathering into one main body part 1123.

The microwaves that have moved along the connection portion 1121 while maintaining their respective characteristics are overlapped in the body portion 1123. When a plurality of microwaves are overlapped in the main body 1123, phenomena such as amplification, attenuation, and cancellation occur, so that the radiated energy can be controlled in combination. Since the wavelength is amplified when microwaves of the same phase and wavelength are simultaneously irradiated with the waveguide 112 from a plurality of oscillation units 110, large energy can be easily transferred to the heating element 111 even when the output of each oscillation unit 110 is low. So high-temperature heat generation is possible.

The microwave heating device 11 according to the second embodiment of the present invention may include a control unit (not shown). The control unit may control each oscillation unit 110 to adjust characteristics such as frequency, phase, and wavelength of the microwave generated.

4 is a view showing a microwave heating device to explain a third embodiment of the present invention. In the third embodiment of the present invention, only differences in comparison with the above-described embodiments will be described, and the same parts will be omitted by replacing with the above description. In addition, among the components of other exemplary embodiments of the present invention, those that have the same function as the above-described parts are denoted by the same reference numerals as the above-described examples.

In the microwave heating device 11 according to the third embodiment of the present invention, at least one oscillation unit 110 is provided at each end of the waveguide 112. Accordingly, the microwave heating device 11 includes a plurality of oscillation units 110. Each of the plurality of oscillation units 110 may generate microwaves having the same or different characteristics such as phase and wavelength.

The waveguide 112 includes a plurality of connection portions 1121 and a body portion 1123 in the form of a tube with both sides open. One or more of the plurality of connection portions 1121 are coupled to both ends of the body portion 1123, respectively. The plurality of connection parts 1121 are coupled to the plurality of oscillation parts 110 and the microwaves generated by the respective oscillation parts 110 move to the main body 1123 through the connected connection parts 1121. Microwaves generated in each oscillation unit 110 may be moved to the body unit 1123 through the connection unit 1121 and may be overlapped.

5 is a view showing a microwave heating device for explaining a fourth embodiment of the present invention. In the fourth embodiment of the present invention, only differences in comparison with the above-described embodiments are described, and the same parts are replaced with the above description and omitted. In addition, among the components of other exemplary embodiments of the present invention, those that have the same function as the above-described parts are denoted by the same reference numerals as the above-described examples.

The microwave heating device 11 according to the fourth embodiment of the present invention includes an oscillator 11, a waveguide 112, a heating element 111, a control unit 14, a temperature sensor 15, and a power supply unit 16. .

The temperature sensor 15 is provided around the heating element 111. The temperature sensor 15 measures the temperature of the heating element 111 and transmits the measured temperature information to the control unit 14.

The control unit 14 receives temperature information from the temperature sensor 15. The controller 14 may control the temperature of the heating element 111 based on the temperature information received from the temperature sensor 15. The control unit 14 may control the temperature of the heating element 111 to be maintained within a certain range. The control unit 14 may control the power supplied to the oscillator 110 so that the temperature of the heating element 11 is maintained within a certain range, which can be achieved by controlling the power supply unit 16. For example, when the temperature of the heating element 111 is higher than the upper limit temperature (HT), the control unit 14 controls the power supply unit 16 to cut off power, and when the temperature of the heating element 111 is lower than the lower limit temperature (LT), the power supply unit ( 16) can be controlled to re-supply power. It is preferable that the upper limit temperature (HT) is 800°C and the lower limit temperature (LT) is 400°C.

The power supply unit 16 supplies power to the oscillation unit 110. The oscillation unit 110 may generate microwaves using power supplied from the power supply unit 16. The power supply unit 16 may include a switch sw that cuts off power supplied to the oscillator unit 110. The controller 14 may control the power supplied to the oscillator 110 by controlling the switch sw.

6 is a view for explaining a thermal desorption treatment system using a microwave heating device according to another embodiment of the present invention. Other embodiments of the present invention will be described only different points compared to the above-described embodiments, and the same parts will be omitted by replacing them with the above description. In addition, among the components of other exemplary embodiments of the present invention, those that have the same function as the above-described parts are denoted by the same reference numerals as the above-described examples.

A thermal desorption processing system using a microwave heating device according to another embodiment of the present invention includes a microwave heating device 11 and a storage unit 10.

The microwave heating device 11 is preferably provided with a total length of 1 to 5 m.

The storage unit 10 provides a space for thermal desorption by storing contaminated soil. The storage unit 10 has a microwave heating device 11 inserted therein. The microwave heating device 11 may be disposed inside the storage unit 10 at regular intervals. The storage unit 10 may be provided in an appropriate size so that the thermal desorption treatment of contaminated soil can be efficiently performed by the heat generated by the microwave heating device 11. The storage unit 10 is preferably provided in a form in which the length in the horizontal direction is longer than the length in the vertical direction so that a plurality of microwave heating devices 11 can be arranged (see FIG. 6 ). For example, when the microwave heating device 11 is provided in a length of 1 to 5 m, the storage unit 10 may be provided in a box shape having a width of 10 to 20 m, a length of 1 to 6 m, and a height of 2 to 5 m.

The storage unit 10 is preferably provided with a material having heat retention so that the internal temperature can be minimized from escaping to the outside while thermal desorption is in progress. The storage unit 10 may use a box-shaped configuration that is readily available, such as, for example, a container box, and insulating materials such as styrofoam may be installed on the walls and floors of the interior to enhance thermal insulation.

The storage unit may include an intake unit 12. The intake unit 12 may absorb vaporized pollutants generated during the thermal desorption treatment process and discharge them to the outside.

The storage unit 10 may include a moisture discharging device 13. The moisture discharging device 13 may prevent moisture from accumulating on the bottom of the storage unit 10 by discharging moisture generated during the thermal desorption treatment process to the outside.

10: storage unit 11: microwave heating device
110: oscillation part 111: heating element
112: waveguide 1121: connection
1123: main body 113: slit
114: steel pipe 12: intake part
13: water discharge device 14: control unit
15: temperature sensor 16: power supply
sw: operation switch

Claims (20)

An oscillation unit generating a microwave;
A waveguide that receives the microwave generated from the oscillation unit and moves along the inside; And
A heating element heated by receiving the microwave of the waveguide
Including,
The heating element is
Fe-Cr-Al-based alloy or provided as a material containing the Fe-Cr-Al-based alloy, and the Fe-Cr-Al-based alloy is composed of quenched steel slag particles having a particle size of 5.0 mm or less and a sphericity of 0.5 or more. The thickness of a specific part is provided in a form different from that of other parts,
The waveguide is
A connection part connected to one side of the oscillation part to receive a microwave from the oscillation part; And a main body receiving the microwave generated by the oscillation unit through the connection unit,
The heating element is provided to surround the outside of the main body,
It includes a steel pipe provided in a form surrounding the heating element outside the heating element,
Microwave heating device with the overall shape provided in the form of a round bar. The method according to claim 1,
The waveguide is
Provided with a material that can block microwaves
Microwave heating device. The method according to claim 1,
The waveguide is
Provided with a material containing SUS (Steel Use Stainless)
Microwave heating device. The method according to claim 1,
The waveguide is
Including a slit through which the inside microwave can be emitted to the outside.
Microwave heating device. delete The method according to claim 1,
The body part
Including a slit capable of emitting the microwave inside to the outside
Microwave heating device. The method according to claim 1,
The body part
Provided in the form of a closed tube at one end
Microwave heating device. delete delete delete delete delete The method according to claim 1,
The oscillation unit is provided in plurality,
The plurality of oscillators are connected to one side of the waveguide
Microwave heating device. The method according to claim 1,
The oscillation unit is provided in plurality,
The plurality of oscillation units are each connected to one or more ends of the waveguide.
Microwave heating device. The method according to claim 1,
A temperature sensor provided around the heating element to measure the temperature of the heating element; And
A control unit for receiving temperature information of the heating element from the temperature sensor and controlling the temperature of the heating element; further comprising
Microwave heating device. The method of claim 15,
Further comprising a; power supply for supplying power to the oscillation unit,
Temperature control of the heating element by the control unit is performed by the control unit controlling the power supply unit.
Microwave heating device. The method of claim 16,
The power supply unit includes a switch,
Temperature control of the heating element by the control unit is performed by the control unit controlling the switch.
Microwave heating device. The microwave heating device of any one of claims 1 to 4, 6, 7 and 13 to 17; And
Containing; a storage unit into which the microwave heating device is inserted
Thermal desorption treatment system using microwave heating device. The method of claim 18,
In the storage unit, insulation is installed on the inner wall and floor.
Thermal desorption treatment system using microwave heating device. The method of claim 18,
The storage unit
An intake part for absorbing vaporized pollutants generated during the thermal desorption treatment process and discharging them to the outside; And
Containing a moisture discharging device for discharging moisture generated during the thermal desorption treatment process to the outside
Thermal desorption treatment system using microwave heating device.

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