A double sandwich cup type dielectric barrier discharge fuel plasma gasification research device

Abstract

The application provides a double sandwich cup type dielectric barrier discharge fuel plasma gasification research device, three quartz cups with different sizes are nested and combined, a double layer cavity is formed at the bottom of the quartz cup, air in the upper layer cavity is extracted to form a vacuum layer, heat transfer in the heating area to the dielectric layer and the sealing area of the upper quartz cup is blocked, the quartz dielectric is prevented from being broken down under high temperature conditions, and air leakage caused by melting of the sealing structure under high temperature conditions is avoided. The lower layer cavity is used for placing a solid sample to carry out high temperature plasma reaction, reaction kinetics is obtained by detecting tail gas of the reaction, the thickness of the reaction cavity is controlled through the sealing pad, and the dead volume of the reaction is reduced. The circular protrusion in the grounding heating block binds the electric arc generated by the discharge electrode, and the discharge phenomenon at the edge of the discharge electrode is avoided. The integrated design reduces the complexity of installation of the experimental instrument, is easy to operate, and realizes the research on the plasma gas-solid reaction mechanism under the dielectric barrier discharge under high temperature conditions.

Description

Technical Field

[0001] This invention belongs to the field of dielectric barrier discharge, specifically relating to a research device for fuel plasma gasification using a double-layered cup-type dielectric barrier discharge. Background Technology

[0002] Plasma technology, by influencing functional groups in molecular structures through electrical discharges to enhance the reactivity of substances, has become a novel catalytic technology. Currently, plasma is widely used in hydrocarbon cracking, tar conversion, and thermochemical conversion of solid waste; however, research on the mechanisms of catalytic reactions under high-temperature conditions is relatively limited. The main reason is that under high-temperature conditions in dielectric barrier discharge reactors, the dielectric constant changes due to heating, making them prone to phenomena such as discharge breakdown. Therefore, research on the thermochemical reaction mechanisms of dielectric barrier discharge under high-temperature conditions is currently lacking.

[0003] Existing dielectric barrier discharge reactors are mostly coaxial discharge types, which are convenient for studying discharge reactions in the gas phase at room temperature, but cannot meet the conditions for discharge reactions in the gas-solid state. To achieve high-temperature effects, an insulation layer is usually wrapped around the outside of the coaxial reactor, but this can lead to electrode damage and inadequate sealing. Furthermore, temperature affects the uniformity of the electric field generated by dielectric barrier discharge, and dielectric breakdown is more likely to occur as the temperature increases. Therefore, reducing the temperature of the dielectric and solving the high-temperature sealing problem are important considerations in the design of the reactor structure. Summary of the Invention

[0004] This invention aims to solve the problems of excessively high dielectric temperature, breakdown, and thermal expansion damage of the sealing ring that easily occur in existing parallel-plate dielectric barrier discharge structures. This invention uses the principle of vacuum layer insulation to separate the high-temperature region from the sealing ring and electrodes, while simplifying the structure and optimizing the overall reaction process.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention provides a research apparatus for fuel plasma gasification using a double-layered cup-type dielectric barrier discharge. The apparatus includes a heating electrode and a reactor disposed above the heating electrode. The reactor comprises a first quartz cup, a second quartz cup, and a third quartz cup with gradually increasing cup sizes. The first, second, and third quartz cups are nested sequentially above the heating electrode, ranging from being furthest from the heating electrode to being closest to it. A first sealing ring is provided between the first and second quartz cups, and a second sealing ring is provided between the second and third quartz cups, to ensure that the first quartz cup... The first, second, and third quartz cups are sealed together in pairs. A discharge electrode is attached to the inner bottom of the first quartz cup. A first cavity is formed between the first and second quartz cups, with the bottom of the first cavity serving as a vacuum layer. A second cavity is formed between the second and third quartz cups, with the bottom of the second cavity serving as a high-temperature reaction layer. A vacuum extraction pipe connected to the first cavity is provided on the first quartz cup, and the vacuum extraction pipe is used for evacuation. The third quartz cup is provided with a gas inlet pipe, a gas outlet pipe, and a thermocouple branch pipe connected to the second cavity.

[0007] It should be noted that in this invention, the reactor consists of three nested quartz cups. The three nested cups at the bottom form two cavities, and a sealing ring is placed between the three cups to prevent gas leakage from the reaction layer. A cavity gap is formed between the bottoms of every two quartz cups, with the upper cavity serving as a vacuum layer. The uppermost quartz cup has a pre-installed vacuum gas outlet pipe, connected to a vacuum pump for evacuation, which reduces the heat transfer coefficient in this area. The vacuum layer blocks heat transfer from the lower high-temperature region, suppressing breakdown under high-temperature conditions and preventing leakage caused by thermal expansion of the sealing ring. The lower cavity is the high-temperature reaction layer. The sample is placed flat on the reaction layer. The lowermost quartz cup has three identical gas pipes: two gas branches serve as the inlet and outlet for the reaction gas, and the third serves as a thermocouple branch. The bent thermocouple is placed at the heating center to measure the temperature difference between the heating block and the heating center of the high-temperature reaction layer, which serves as the compensation temperature. In addition, the heating electrode in this invention integrates the grounding electrode and the heating block, which not only meets the requirements of plate-type dielectric barrier discharge, but also simplifies the overall reaction structure.

[0008] Preferably, the tops of the first, second, and third quartz cups are all provided with outwardly extending rims, and the first and second sealing rings are both located at these rims. The thicknesses of both the first and second sealing rings are adjustable, used to adjust the distance between the bottoms of the first and second quartz cups, and between the bottoms of the second and third quartz cups. The sealing rings are positioned away from high-temperature areas, preventing leakage due to thermal expansion. The thickness of the sealing rings also adjusts the distance between the reaction layers. Specifically, the side nesting holes are approximately 2mm, ensuring reactor assembly while reducing dead zones without gas flow, facilitating the blowing of reactants into the mass spectrometer during the reaction. Using the bottom plate of the uppermost quartz cup as the discharge dielectric layer, the heat from the lower high-temperature reaction layer is blocked by the vacuum layer and does not affect the dielectric constant of the upper dielectric layer, enabling stable discharge without dielectric breakdown at high temperatures.

[0009] Preferably, the reactor further includes a quartz retainer clamped on the rim of the cup for tightly binding the first quartz cup, the first sealing ring, the second quartz cup, the second sealing ring, and the third quartz cup.

[0010] Preferably, the heating electrode includes a heating electrode body disposed within an insulation layer. The insulation layer has openings on one side and top, exposing one side surface and the upper surface near the reactor of the heating electrode body. The exposed side surface of the heating electrode body has a heating rod hole and a thermocouple hole, while the upper surface has a boss and a grounding threaded hole. The heating rod hole is used to hold the heating rod, the thermocouple hole is used to measure temperature to control the output power signal of the heating rod, the boss is used to confine the discharge electric field, and the grounding threaded hole is used to connect a grounding wire. Specifically, the heating element is a ceramic heating rod with a heat storage coating. The ceramic heating rods are connected in parallel and placed in the heating holes to meet high-temperature requirements.

[0011] Preferably, the number of heating rod holes is four, and the four heating rod holes are evenly distributed horizontally at the center of the side surface of the heating electrode; the thermocouple hole is located above the heating rod holes in the middle; the boss is cylindrical, and the cylindrical boss is located at the center of the upper surface of the heating electrode body. Specifically, the heating electrode is grounded as a whole, and a 2mm thick cylindrical boss is machined on the upper surface of the heating electrode body to confine the discharge electric field. The structural dimensions of the boss mainly consider the influence of the electric field generated by the discharge electrode. If the boss size is too large, the discharge electrode will produce edge discharge, which will destroy the uniformity of the electric field. In addition, since the heat insulation layer is mainly arranged below and around the heating electrode body, the heat dissipation of the upper surface of the heating electrode body will be faster. Therefore, ceramic sheets with circular holes can also be placed on the boss to reduce heat loss.

[0012] Preferably, the diameter of each heating rod hole is 10 mm, and the diameter of the thermocouple hole is 2 mm.

[0013] Preferably, the device further includes a base for placing the heating electrode. A first threaded rod and a second threaded rod are respectively provided on both sides of the base, and the heating electrode is located between the first and second threaded rods. An insulating bracket is erected between the tops of the first and second threaded rods, and a threaded suspension rod passes through the middle of the insulating bracket. One end of the threaded suspension rod is connected to the discharge electrode, and the other end is connected to a high-voltage cable. The first and second threaded rods can be made of stainless steel. The discharge electrode is suspended by the threaded suspension rod from the insulating bracket and placed in the uppermost quartz cup. The threaded suspension rod is fixed with bolts at the connection points between the insulating bracket and the discharge electrode to prevent the discharge electrode from falling and damaging the quartz cup, thereby damaging the reactor. Furthermore, the high-voltage cable is connected to the threaded suspension rod.

[0014] Preferably, the insulating bracket is provided with a first air gap adjusting screw and a second air gap adjusting screw at both ends, which are used to adjust the longitudinal position of the threaded rod and further adjust the longitudinal position of the discharge electrode.

[0015] Compared with the prior art, the technical solution provided by the present invention has at least the following advantages:

[0016] This invention improves upon room-temperature plate dielectric barrier discharge by designing a novel high-temperature plasma reactor—a double-jacketed cup-type quartz reactor. Three quartz cups of different sizes are nested together, forming a double-layer cavity at the bottom. Air is extracted from the upper cavity to create a vacuum layer, preventing heat transfer from the heating zone to the dielectric layer and sealing area of ​​the upper quartz cup. This prevents the quartz dielectric from breaking down under high-temperature conditions and avoids leakage due to melting of the sealing structure at high temperatures. A solid sample is placed in the lower cavity for a high-temperature plasma reaction. Reaction kinetics are obtained by monitoring the reaction exhaust gas, and the thickness of the reaction chamber is controlled by a sealing gasket to reduce the dead volume of the reaction. A circular protrusion in the grounded heating block confines the arc generated by the discharge electrode, preventing discharge phenomena at the electrode edge. The integrated design reduces the complexity of experimental instrument installation, facilitates operation, and enables the study of the plasma gas-solid reaction mechanism of dielectric barrier discharge under high-temperature conditions. The influence of dielectric barrier discharge on the coke reaction mechanism under high-temperature conditions is also investigated. The double-layered cavity reactor, composed of three nested quartz cups, meets the sealing requirements under high-temperature conditions, and the distance between the high-temperature reaction layers can be adjusted by changing the thickness of the sealing ring. The combination of the heating block and the grounding electrode simplifies the reactor structure and optimizes the experimental operation process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the embodiments will be briefly described below.

[0018] Figure 1 A schematic diagram of the structure of a fuel plasma gasification research device with double-layered cup-type dielectric barrier discharge provided by the present invention;

[0019] Figure 2.1 This is a schematic diagram of the reactor structure in this invention;

[0020] Figure 2.2 This is a schematic diagram of the fastening structure of the reactor in this invention;

[0021] Figure 3 This is a schematic diagram of the heating electrode structure in this invention;

[0022] Figure 4 This is a schematic diagram of the reaction principle of the present invention;

[0023] Figure 5 This shows the relationship between reactivity and carbon conversion rate.

[0024] Figure 6 A comparison chart showing the changes in gaseous products between pure cellulose vaporization and electrical vaporization.

[0025] Figure 7 A comparison chart showing the changes in gaseous products from pure pyrolysis and electric pyrolysis of cellulose;

[0026] Figure 8 The curves showing the actual output U and It curves of cellulose discharge pyrolysis at 25℃.

[0027] In the diagram, 1-high voltage cable, 2-threaded hanger, 3-first threaded rod, 4-insulating bracket, 5-first air gap adjusting screw, 6.a-first quartz cup, 6.b-first sealing ring, 6.c-second quartz cup, 6.d-second sealing ring, 6.e-third quartz cup, 6.f-vacuum extraction pipe, 6.g-thermocouple branch pipe, 6.h-quartz fixing clip, 7-gas outlet pipe, 8-base, 9.a-heating rod hole, 9.b-thermocouple hole, 9.c-insulation layer, 9.d-cylindrical boss, 9.e-grounding threaded hole, 10-high temperature reaction layer, 11-vacuum layer, 12-gas inlet pipe, 13-discharge electrode, 14-second air gap adjusting screw, 15-second threaded rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] This invention provides a research device for fuel plasma gasification with a double-layered cup-type dielectric barrier discharge, such as... Figure 1 , Figure 2.1 As shown, the device includes: a heating electrode, and a reactor disposed above the heating electrode; the reactor includes a first quartz cup 6.a, a second quartz cup 6.c, and a third quartz cup 6.e, whose cup sizes gradually increase. The first quartz cup 6.a, the second quartz cup 6.c, and the third quartz cup 6.e are nested sequentially above the heating electrode in a manner ranging from the side away from the heating electrode to the side closer to the heating electrode; a first sealing ring 6.b is disposed between the first quartz cup 6.a and the second quartz cup 6.c, and a second sealing ring 6.d is disposed between the second quartz cup 6.c and the third quartz cup 6.e, so that the first quartz cup 6.a, the second quartz cup 6.c, and the third quartz cup 6.e... 6.e A sealed state is formed between each pair of quartz cups; wherein, a discharge electrode 13 is attached to the inner bottom of the first quartz cup 6.a; a first cavity is formed between the first quartz cup 6.a and the second quartz cup 6.c, and the bottom of the first cavity serves as a vacuum layer 11; a second cavity is formed between the second quartz cup 6.c and the third quartz cup 6.e, and the bottom of the second cavity serves as a high-temperature reaction layer 12; a vacuum extraction pipe 6.f connected to the first cavity is provided on the first quartz cup 6.a, and the vacuum extraction pipe 6.f is used for evacuating a vacuum; a gas inlet pipe 12, a gas outlet pipe 7, and a thermocouple branch pipe 6.g connected to the second cavity are provided on the third quartz cup 6.e.

[0030] like Figure 2.2 As shown, the reactor also includes a quartz fixing clip 6.h clamped on the rim of the cup, for tightly binding the first quartz cup 6.a, the first sealing ring 6.b, the second quartz cup 6.c, the second sealing ring 6.d, and the third quartz cup 6.e.

[0031] like Figure 3As shown, the heating electrode includes a heating electrode body disposed within an insulation layer 9.c. The insulation layer 9.c has openings on one side and top, exposing one side surface of the heating electrode body and its upper surface near the reactor. The exposed side surface of the heating electrode body is provided with a heating rod hole 9.a and a thermocouple hole 9.b, and the upper surface is provided with a boss 9.d and a grounding threaded hole 9.e. The heating rod hole 9.a is used to place a heating rod, the thermocouple hole 9.b is used to measure temperature to control the output power signal of the heating rod, the boss 9.d is used to confine the discharge electric field, and the grounding threaded hole 9.e is used to connect a grounding wire.

[0032] (1) Place the heating electrode between the first threaded rod 3 and the second threaded rod 15 on the base 8, and place the heating electrode body above the insulation layer 9.d. Four heating rods with heat-storing coatings are connected in parallel and inserted into the heating rod hole 9.a. A K-type thermocouple is inserted into the thermocouple hole 9.b. Both the thermocouple and the heating rod electrode wires are protected with heat-resistant insulating sleeves to prevent short circuits. The temperature detected by the thermocouple at this location is the input signal for the temperature controller, and the heating rod acts as the output actuator of the temperature controller. Connect the grounding wire to the grounding threaded hole 9.e using a 3mm diameter bolt to ensure the heating block is grounded throughout. Use ceramic sheets with circular holes placed on the surface of the insulation layer 9.d to reduce heat loss.

[0033] (2) Place the third quartz cup 6.e on the heating electrode, put in the sample and flatten it. Place the second sealing ring 6.d on the edge of the cup. Then assemble the reactor in the order of second quartz cup 6.c, first sealing ring 6.b, and first quartz cup 6.a. Tighten the bolts on the top of the fixing clamp to clamp the quartz fixing clamp 6.h. Before heating, connect the vacuum pump and vacuum extraction pipe 6.f to extract the air from the vacuum layer and maintain the vacuum layer pressure at a certain value. By observing the change rate of the vacuum pump reading and the leakage of the leak detection liquid, determine whether there is any leakage in the vacuum layer. Use two silicone hoses with an inner diameter of 8 mm to connect the gas inlet pipe 7 and the gas outlet pipe 12 of the third quartz cup 6.e. Connect the gas outlet pipe 7 to the mass spectrometer. Introduce argon protective gas at a rate of 100 mL / min for 30 minutes to purge the original air in the reactor and ensure that the coke has not reacted with oxygen in advance. Then heat to 800℃.

[0034] (3) After connecting the discharge electrode 13 to the insulating support 4, gently place it inside the first quartz cup 6.a. Connect the discharge electrode 13 to the power supply using the high-voltage cable 1. Connect the oscilloscope and plasma generator using a capacitance sampling connection. After the circuit connection is completed, check whether the high-voltage cable 1 is in contact with the metal surface and the grounding wire. After the check is completed, turn on the dielectric barrier discharge power supply, adjust the voltage and frequency, and wait for the voltage and current display in the oscilloscope to stabilize. Then switch to a water vapor or carbon dioxide reaction atmosphere to carry out the reaction. During the reaction, use an online mass spectrometry monitoring system to monitor the changes in the products in real time. When the temperature rises, observe whether the reading fluctuates to detect whether there is a gas leak and whether the gas has been completely discharged before the reactor is heated.

[0035] The following examples illustrate the specific structure and usage of the high-temperature dielectric barrier discharge device of the present invention, using the gasification reaction of biomass char and water vapor at 800°C. Figure 4 This is a schematic diagram of the reaction principle of the present invention.

[0036] Example 1

[0037] In this example, the discharge electrode 13 is made of stainless steel, the reactor is made of quartz, and the heating electrode body is made of 316 stainless steel, which is resistant to high temperatures. An alumina insulation layer 9.c is placed around the heating electrode body to reduce heat loss from the non-central areas of the heating electrode body.

[0038] The overall device connection steps are as follows:

[0039] (1) The discharge electrode 13 is connected to the discharge power supply via a high-voltage cable. The heating electrode body is connected to the grounding post in the power supply instrument via a wire. The oscilloscope probe is connected to the power supply to display the Lissajous figure and measure the output power.

[0040] (2) Place the heating electrode between the first threaded rod 3 and the second threaded rod 15, and place the heating electrode body above the insulation layer 9.c. Insert four heating rods with heat storage coatings in parallel into the heating rod hole 9.a, and insert the K-type thermocouple into the thermocouple hole 9.b. Both the thermocouple and the heating rod electrode wires are protected with heat-resistant insulating sleeves. Connect the grounding wire to the grounding threaded hole 9.e using a bolt with a diameter of 3mm to ensure that the heating electrode body is grounded throughout.

[0041] (3) Insert the thermocouple into the thermocouple branch 6.g of the third quartz cup 6.e to measure the temperature difference between the sample and the heating block, as a compensation temperature. Then, assemble the third quartz cup 6.e, the second sealing ring 6.d, the second quartz cup 6.c, the first sealing ring 6.b, and the first quartz cup 6.a in that order from bottom to top and clamp them with the quartz clamp 6.h. The reaction gas is introduced into the gas inlet pipe 12 of the third quartz cup 6.e through the silicone tube, and the gas outlet pipe 7 of the third quartz cup 6.e is connected to the online mass spectrometry monitoring system. If the reaction gas contains water vapor, a water vapor generating system needs to be installed on the gas inlet pipe 12, and a condenser is connected to the gas outlet pipe 7 to prevent water vapor from entering the mass spectrometer and clogging the capillary tube.

[0042] (4) Connect the vacuum pump to the vacuum pump and the vacuum pump pipe 6.f of the first quartz cup 6.a, extract the air from the vacuum layer, maintain the vacuum layer pressure at a constant value, and observe the rate of change of the vacuum pump pressure to detect whether the vacuum layer is leaking.

[0043] (5) Based on multiple measurements, the compensation temperature is 150℃, the heating block temperature is raised to 950℃, and the sample temperature is 800℃. Set the temperature control chamber to 950℃, introduce Ar, purge the air from the reactor, and start heating. After the temperature stabilizes, turn on the power to discharge.

[0044] (6) After the current and voltage in the oscilloscope stabilize, switch the reaction atmosphere (water vapor or carbon dioxide) and pass the gas after the reaction into the online mass spectrometer.

[0045] The sample was straw biomass char pretreated at 700℃ with a water vapor content of 20% and argon as the protective gas. The input voltage was 80V and the input current was 0.8A. After the reaction was completed, the standard gas was used for calibration to calculate the C conversion rate. The results are shown in Figure 5.

[0046] Figure 5 The results show that the reaction rate of biomass char initially increases rapidly under both discharged and undischarged conditions, reaches a peak, and then begins to decline. Specifically, the overall reaction rate is faster under discharged conditions than under undischarged conditions. Figure 6 In the diagram, point a represents the variation of CH4 over time, point b represents the variation of CO over time, point c represents the variation of CO2 over time, and point d represents the variation of H2 over time. Figure 6 The results showed that the concentration of gaseous products from the cellulose vaporization reaction was higher under the discharge condition than under the non-discharge condition, and different gases showed different sensitivities to discharge conditions.

[0047] Example 2

[0048] This example demonstrates a cellulose pyrolysis experiment under dielectric barrier discharge plasma conditions. The overall experimental setup and procedures are identical to those in Example 1. The reaction atmosphere is pure argon, the sample is cellulose, and the temperature is programmed at a rate of 5°C / min. The input voltage is 50V, and the input current is 1.0A. The actual output voltage and current are as follows: Figure 8 As shown, the exhaust gas was passed into a mass spectrometer during the reaction process to observe the effect of plasma on the gas production pattern of cellulose pyrolysis. The results are as follows. Figure 7 As shown. In Figure 7 In the diagram, point a represents the change of CH4 over time, point b represents the change of CO over time, point c represents the change of CO2 over time, and point d represents the change of H2 over time. The sensitivities of the generated gases to the discharge reaction differ. CO2 and CH4 begin to be generated during dielectric barrier discharge, and then a secondary peak appears near 260℃ as the temperature increases. CO begins to be generated during discharge, with a relatively slow generation rate, which increases near 260℃. H2 production is low during pure pyrolysis, but the total production increases under discharge conditions.

[0049] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A research device for fuel plasma gasification using a double-layered cup-type dielectric barrier discharge, characterized in that, The device includes: a heating electrode, and a reactor disposed above the heating electrode; The reactor includes a first quartz cup (6.a), a second quartz cup (6.c), and a third quartz cup (6.e) with gradually increasing cup sizes. The first quartz cup (6.a), the second quartz cup (6.c), and the third quartz cup (6.e) are nested sequentially above the heating electrode in a manner ranging from being away from the heating electrode to being close to the heating electrode. A first sealing ring (6.b) is provided between the first quartz cup (6.a) and the second quartz cup (6.c), and a second sealing ring (6.d) is provided between the second quartz cup (6.c) and the third quartz cup (6.e), so that the first quartz cup (6.a), the second quartz cup (6.c) and the third quartz cup (6.e) form a sealed state between each other; A discharge electrode (13) is attached to the inner bottom of the first quartz cup (6.a); a first cavity is formed between the first quartz cup (6.a) and the second quartz cup (6.c), and the bottom of the first cavity serves as a vacuum layer (11); a second cavity is formed between the second quartz cup (6.c) and the third quartz cup (6.e), and the bottom of the second cavity serves as a high-temperature reaction layer (10). The first quartz cup (6.a) is provided with a vacuum pumping pipe (6.f) that communicates with the first cavity, and the vacuum pumping pipe (6.f) is used to pump a vacuum; the third quartz cup (6.e) is provided with a gas inlet pipe (12), a gas outlet pipe (7), and a thermocouple branch pipe (6.g) that communicate with the second cavity. The heating electrode includes a heating electrode body disposed within an insulation layer (9.c), wherein one side and the top of the insulation layer (9.c) are open so that one side surface of the heating electrode body and the upper surface near the reactor are exposed. The exposed side surface of the heating electrode body is provided with a heating rod hole (9.a) and a thermocouple hole (9.b), and the upper surface is provided with a boss (9.d) and a grounding threaded hole (9.e). The heating rod hole (9.a) is used to place the heating rod, the thermocouple hole (9.b) is used to measure the temperature to control the output power signal of the heating rod, the boss (9.d) is used to confine the discharge electric field, and the grounding threaded hole (9.e) is used to connect the grounding wire. The device also includes a base (8) for placing the heating electrode, with a first threaded rod (3) and a second threaded rod (15) respectively provided on both sides of the base (8), and the heating electrode is located between the first threaded rod (3) and the second threaded rod (15). An insulating support (4) is provided between the top of the first threaded rod (3) and the second threaded rod (15). A threaded hanger (2) is provided at the middle position of the insulating support (4). One end of the threaded hanger (2) is connected to the discharge electrode (13), and the other end is connected to the high-voltage cable (1). The insulating bracket (4) is provided with a first air gap adjusting screw (5) and a second air gap adjusting screw (14) at both ends, which are used to adjust the longitudinal position of the threaded rod (2) and further adjust the longitudinal position of the discharge electrode (13).

2. The fuel plasma gasification research device with double-layered cup-type dielectric barrier discharge according to claim 1, characterized in that, The top of the first quartz cup (6.a), the second quartz cup (6.c) and the third quartz cup (6.e) are all provided with outwardly extending cup rims, and the first sealing ring (6.b) and the second sealing ring (6.d) are both provided at the cup rims; The thickness of the first sealing ring (6.b) and the second sealing ring (6.d) is adjustable, which is used to adjust the distance between the bottom of the first quartz cup (6.a) and the second quartz cup (6.c), and between the bottom of the second quartz cup (6.c) and the third quartz cup (6.e).

3. The fuel plasma gasification research device with double-layered cup-type dielectric barrier discharge according to claim 2, characterized in that, The reactor also includes a quartz clamp (6.h) clamped on the rim of the cup for tightly binding the first quartz cup (6.a), the first sealing ring (6.b), the second quartz cup (6.c), the second sealing ring (6.d), and the third quartz cup (6.e).

4. The fuel plasma gasification research device with double-layered cup-type dielectric barrier discharge according to claim 1, characterized in that, The number of heating rod holes (9.a) is four, and the four heating rod holes (9.a) are evenly distributed in the horizontal direction at the middle position of the side surface of the heating electrode; The thermocouple hole (9.b) is located above the heating rod hole (9.a) in the middle; The boss (9.d) is cylindrical and is located at the middle position on the upper surface of the heating electrode body.

5. The fuel plasma gasification research device with double-layered cup-type dielectric barrier discharge according to claim 4, characterized in that, The diameter of each heating rod hole (9.a) is 10 mm, and the diameter of each thermocouple hole (9.b) is 2 mm.

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