A reverse vortex sliding arc underwater discharge plasma nitrogen fixation device and method

Abstract

The application discloses a kind of reverse vortex sliding arc underwater discharge plasma nitrogen fixation device and method, including discharge component, chamber component, power supply component, water supply component, gas supply component, gas phase product receiving component and liquid phase product receiving component;Two discharge components are respectively arranged in the two sides of chamber component and the output end is inserted into the cavity of chamber component setting, the output end of power supply component is respectively connected to two discharge components, the output end of water supply component is communicated with the cavity of chamber component, the output end of gas supply component is communicated with discharge component, the gas output by gas supply component is input into the cavity of chamber component by the output end of discharge component, gas phase product receiving component and liquid phase product receiving component are all communicated with chamber component;The nitrogen fixation device and method enhance the contact degree of plasma with air and water, improve the raw material conversion rate in the process of nitrogen fixation, NO x yield and nitrogen fixation energy efficiency.

Description

Technical Field

[0001] This invention relates to the field of plasma nitrogen fixation technology, and in particular to a reverse vortex sliding arc underwater discharge plasma nitrogen fixation device and method. Background Technology

[0002] Nitrogen compounds are widely used in agriculture, food, textiles, and other related industries. The mainstream industrial nitrogen fixation method is the Haber-Bosch (HB) process, which synthesizes ammonia through the reaction of hydrogen and nitrogen under high temperature, high pressure, and heterogeneous catalyst conditions. The HB process requires significant initial and operating costs to create the stringent reaction conditions; furthermore, the use of high-value gas H2 further increases the cost of nitrogen fixation. On the other hand, the HB process requires substantial energy, consuming large amounts of fossil fuels and increasing CO2 emissions. The ammonia-containing wastewater it produces also impacts the environment. To align with low-carbon and environmental protection policies and promote the development of related industries, the development of new nitrogen fixation technologies is essential.

[0003] Compared to the traditional HB process, plasma nitrogen fixation technology can directly use air as a raw material to efficiently convert N2 into nitrogen-containing compounds, providing a new approach for the development of industrial nitrogen fixation technology. Studies have shown that non-thermal plasma can provide a highly reactive environment at low or room temperature. For example, high-energy electrons in plasma can excite nitrogen and oxygen molecules from their ground state, providing various active particles, including vibrational molecules, atoms, and free radicals, to overcome the high energy barrier in nitrogen conversion. Therefore, non-thermal plasma nitrogen fixation devices have lower theoretical nitrogen fixation energy consumption (A review of the existing and alternative methods for greener nitrogen fixation. Chemical Engineering and Processing, 2015. 90(0), 24-33.). Currently, commonly used plasma nitrogen fixation discharge methods include DBD discharge, sliding arc discharge, microwave discharge, and pulsed discharge. Among them, the sliding arc discharge method has advantages such as high reactivity, high energy density, and easy scale-up, and is considered to have great potential as a new industrial nitrogen fixation method.

[0004] Sliding arc plasma discharge technology enables plasma-water interaction, using air and water as raw materials. This reduces the economic cost of nitrogen fixation while producing diverse products such as activated water and nitrogen oxides. Currently, the contact between plasma and air / water in sliding arc devices is limited, making efficient conversion of N2, O2, and H2O difficult. Furthermore, maintaining high NO levels under high airflow conditions is challenging. xThe product concentration is high and the nitrogen fixation energy consumption is low. For example, Indumathy et al. directly injected the plasma jet formed during the sliding arc plasma discharge into water, and the experiment confirmed that at the plasma-water interface, free electrons and vibrationally excited nitrogen species can directly undergo oxidation and reduction with water molecules to generate NH4, NO2, and NO3. - (Catalyst-free production of ammonia by means of interaction between a gliding arc plasma and water surface. Journal of Physics D: Applied Physics, 2022, 55(39), 395501). This method improves energy efficiency compared to pure gas phase discharge, but its energy consumption is still very high and needs further optimization. Therefore, it is urgent to develop a method that can significantly increase the contact between plasma and air and water to achieve the goal of low energy consumption and high nitrogen fixation efficiency. Summary of the Invention

[0005] Based on the technical problems existing in the background technology, this invention proposes a reverse vortex sliding arc underwater discharge plasma nitrogen fixation device and method, which enhances the contact degree between plasma and air and water, and improves the raw material conversion rate and NO content in the nitrogen fixation process. x Yield and nitrogen fixation energy efficiency.

[0006] The present invention proposes a reverse vortex sliding arc underwater discharge plasma nitrogen fixation device, comprising a discharge component, a chamber component, a power supply component, a water supply component, a gas supply component, a gas phase product receiving component, and a liquid phase product receiving component.

[0007] Two discharge components are respectively set on both sides of the chamber component and their output ends are inserted into the cavity of the chamber component. The output end of the power supply component is connected to the two discharge components respectively. The output end of the water supply component is connected to the cavity of the chamber component. The output end of the gas supply component is connected to the discharge component. The gas output by the gas supply component is input into the cavity of the chamber component through the output end of the discharge component. The gas phase product receiving component and the liquid phase product receiving component are both connected to the chamber component.

[0008] Furthermore, the discharge assembly includes a tubular electrode, a discharge connector, and a nozzle. The tubular electrode is connected to the nozzle through the discharge connector. An air inlet is provided on the discharge connector and communicates with the nozzle. The output end of the air supply assembly is connected to the air inlet.

[0009] Furthermore, the discharge method of the discharge assembly is reverse vortex sliding arc underwater transfer arc discharge, and the two discharge assemblies are arranged symmetrically about the central axis of the chamber assembly. The positions of the two discharge assemblies are horizontal and at the same height.

[0010] Furthermore, the power supply component includes a power supply and a voltage regulation unit, with the output of the power supply connected to two tubular electrodes via the voltage regulation unit.

[0011] Furthermore, the water supply assembly includes a water source assembly, a water pump, a water throttle valve, and a water flow meter. The output end of the water source assembly is connected to the water inlet on the chamber assembly via a water pipe, which passes through the water pump, the water throttle valve, and the water flow meter in sequence. The water inlet is located between two nozzles.

[0012] Furthermore, the gas supply assembly includes a gas source assembly, a gas pump, a gas throttle valve, and a gas flow meter. The output end of the gas source assembly is connected to the air inlet on two discharge connectors via a gas pipe, which passes through the gas pump, the gas throttle valve, and the gas flow meter in sequence.

[0013] Furthermore, the chamber assembly includes a base, a housing, and a cover plate. The housing is disposed on the base, and the cover plate is disposed above the housing. The space formed by the base, the housing, and the cover plate serves as the cavity of the chamber assembly.

[0014] Furthermore, the shell is provided with an air outlet and a water outlet. The water outlet is located in the upper half of the shell, the water inlet is located in the lower half of the shell, the air outlet is located on the cover plate, the gas phase product receiving component is connected to the air outlet, and the liquid phase product receiving component is connected to the water outlet.

[0015] Furthermore, it includes the following steps:

[0016] The chamber assembly is set horizontally, and gas is supplied to the chamber of the chamber assembly through the gas supply assembly until the gas supply reaches the preset value.

[0017] Water is supplied to the cavity of the chamber assembly through the water supply component until the water flow rate reaches the preset water supply value;

[0018] Detect whether a connecting bubble appears between the output terminals of the two discharge components in the cavity of the chamber assembly;

[0019] If a connected bubble appears, power is supplied to the discharge component through the power supply component, and the gas phase product receiving component and the liquid phase product receiving component are connected to the chamber component.

[0020] If no connecting bubbles appear, increase the gas flow rate output by the gas supply component until connecting bubbles appear.

[0021] The advantages of the reverse vortex sliding arc underwater discharge plasma nitrogen fixation device and method provided by this invention are as follows: Based on the underwater transfer arc discharge plasma nitrogen fixation technology of the reverse vortex sliding arc, this invention enhances the contact between plasma and air and water, thereby achieving better and more efficient conversion of N2, O2, and H2O, and improving the raw material conversion rate and NO2 during the nitrogen fixation process. x Yield and nitrogen fixation energy efficiency. This invention features high product concentration and low energy consumption, and is easy to operate and can be used immediately. It can be coupled with intermittent new energy sources such as solar and wind power to achieve efficient and clean production of nitrogen-containing compounds, and can be used as a modular product in related industries such as agriculture, food, and textiles. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 A schematic diagram of the connection structure between the discharge assembly and the chamber assembly;

[0024] Figure 3 for Figure 2 Top view after assembly;

[0025] Figure 4 A schematic diagram showing the growth status and average stem length of bean sprouts under different treatment conditions;

[0026] Among them, 1-discharge assembly, 2-chamber assembly, 3-power supply assembly, 4-water supply assembly, 5-gas supply assembly, 6-gas phase product receiving assembly, 7-liquid phase product receiving assembly, 11-tubular electrode, 12-discharge connector, 13-nozzle, 14-air inlet, 21-base, 22-shell, 23-cover plate, 24-air outlet, 25-water outlet, 26-water inlet, 31-power supply, 32-pressure regulating unit, 41-water source assembly, 42-water pump, 43-water throttle valve, 44-water flow meter, 51-gas source assembly, 52-gas pump, 53-gas throttle valve, 54-gas flow meter. Detailed Implementation

[0027] The technical solution of the present invention will now be described in detail through specific embodiments. Many specific details are set forth in the following description to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figures 1 to 4As shown, the present invention proposes a reverse vortex sliding arc underwater discharge plasma nitrogen fixation device, comprising a discharge component 1, a chamber component 2, a power supply component 3, a water supply component 4, a gas supply component 5, a gas phase product receiving component 6, and a liquid phase product receiving component 7. The two discharge components 1 are respectively disposed on both sides of the chamber component 2 and their output ends are inserted into the cavity of the chamber component 2. The output ends of the power supply component 3 are respectively connected to the two discharge components 1. The output end of the water supply component 4 is connected to the cavity of the chamber component 2. The output end of the gas supply component 5 is connected to the discharge component 1. The gas output by the gas supply component 5 is input into the cavity of the chamber component 2 through the output end of the discharge component 1. The gas phase product receiving component 6 and the liquid phase product receiving component 7 are both connected to the chamber component 2.

[0029] Discharge component 1 discharges via power supply component 3. The discharge method of discharge component 1 is reverse vortex sliding arc underwater transfer arc discharge. Additionally, water supply component 4 is connected to the cavity of chamber component 2 for water supply. Gas supply component 5 can adjust the gas flow rate to generate different amounts of bubbles in the cavity of chamber component 2, thereby assisting the output ends of the two discharge components 1 to connect in the water through the bubbles, thus achieving underwater discharge. In other words, this invention is based on reverse vortex sliding arc underwater transfer arc discharge plasma nitrogen fixation technology. By enhancing the contact between plasma and air and water, it better achieves the efficient conversion of N2, O2, and H2O, thereby improving the raw material conversion rate and NO2 in the nitrogen fixation process. x Yield and nitrogen fixation energy efficiency. This invention features high product concentration and low energy consumption, and is easy to operate and can be used immediately. It can be coupled with intermittent new energy sources such as solar and wind power to achieve efficient and clean production of nitrogen-containing compounds, and can be used as a modular product in related industries such as agriculture, food, and textiles.

[0030] The gas phase product receiving assembly 6 receives gas from the gas outlet 24 on the chamber assembly 2 via a pipeline; the liquid phase product receiving assembly 7 receives liquid from the water outlet 25 on the chamber assembly 2 via a pipeline. In practical applications, the gas phase product receiving assembly 6 and the liquid phase product receiving assembly 7 serve as product storage devices or product utilization systems. This nitrogen fixation device can produce high concentrations of gaseous NO and NO2 while simultaneously preparing NO-rich products. x * Activated water.

[0031] It should be understood that the chamber assembly 2 includes a base 21, a shell 22, and a cover plate 23. The shell 22 is disposed on the base 21, and the cover plate 23 is disposed above the shell 22. The space formed by the base 21, the shell 22, and the cover plate 23 serves as the cavity of the chamber assembly 2. The shell 22 is provided with an air outlet 24, a water outlet 25, and a water inlet 26. The water outlet 25 is located in the upper half of the shell 22, the water inlet 26 is located in the lower half of the shell 22, the air outlet 24 is located on the cover plate 23, the gas phase product receiving assembly 6 is connected to the air outlet 24, and the liquid phase product receiving assembly 7 is connected to the water outlet 25.

[0032] The housing 22 includes four sides, with the first and third sides facing each other, and the second and fourth sides facing each other. The water inlet 26 and the water outlet 25 are located on the first and third sides, respectively, and the two discharge components 1 are located on the second and fourth sides, respectively. When viewed from the first side as the main view, the water inlet 26 is located exactly on the central axis of the two nozzles 13, preventing asymmetry of the electric arc. In addition, the vertical arrangement of the water inlet 26 and the water outlet 25 allows the water output from the water supply component 4 to penetrate the entire housing 22 to the maximum extent, maintaining a stable concentration of nitrogen compounds at the water outlet 25.

[0033] In this embodiment, the discharge assembly 1 includes a tubular electrode 11, a discharge connector 12, and a nozzle 13. The tubular electrode 11 is connected to the nozzle 13 via the discharge connector 12. An air inlet 14 is provided on the discharge connector 12 and communicates with the nozzle 13. The output end of the air supply assembly 5 is connected to the air inlet 14. Preferably, the tubular electrode 11 is made of stainless steel with an inner diameter of 20 mm, and the end face spacing of the nozzles 13 is 20 mm.

[0034] The gas supplied by the gas supply component 5 is injected into the air inlet between the electrode and the nozzle via a swirling flow. The external airflow of the reverse vortex sliding arc underwater discharge plasma nitrogen fixation device adopts a specific configuration of tangential airflow, which generates a secondary reverse internal vortex airflow that confines the arc in the middle of the tubular electrode 11. This results in almost complete thermal insulation from the wall surface, while providing a longer arc channel and residence time. The gas can be better mixed through the active plasma region, which can further improve the energy efficiency of the reaction.

[0035] The air inlets 14 on the two discharge connectors 12 are also symmetrically arranged. That is, the two discharge components 1 are arranged symmetrically with respect to the central axis of the chamber component 2. The two discharge components 1 are positioned horizontally and at the same height to efficiently realize underwater discharge of the reverse vortex sliding arc after the two nozzles 13 are connected by the connecting bubble.

[0036] The power supply component 3 includes a power supply 31 and a voltage regulating unit 32. The output of the power supply 31 is connected to two tubular electrodes 11 through the voltage regulating unit 32. The power supply 31 is connected to a conventional power grid or a new energy power generation device. The power supply 31 can be a DC power supply cabinet, and the output current can be continuously adjusted in the range of 0-1A. The power supply 31 provides a specific voltage power supply to the tubular electrodes 11. The presence of the voltage regulating unit 32 and the robustness of the discharge component 1 to the power supply make this embodiment highly adaptable to various power supply modes.

[0037] In this embodiment, the water supply component 4 includes a water source component 41, a water pump 42, a water throttling valve 43, and a water flow meter 44. The output end of the water source component 41 is connected to the water inlet 26 on the chamber component 2 via a water pipe, which passes through the water pump 42, the water throttling valve 43, and the water flow meter 44 in sequence. The water inlet 26 is located between two nozzles 13. The water source component 41 can be an open water source, a water storage device, or other clean water source. The water output from the water source component 41 is controlled by the water throttling valve 43 to control the flow rate into the chamber component 2, so as to achieve the preset water supply value displayed by the water flow meter 44, thereby dynamically controlling the water volume in the chamber component 2. In actual use, the water supply component 4 supplies 5 slpm into the chamber of the chamber component 2.

[0038] In this embodiment, the gas supply assembly 5 includes a gas source assembly 51, a gas pump 52, a gas throttle valve 53, and a gas flow meter 54. The output end of the gas source assembly 51 is connected to the air inlet 14 on two discharge connectors 12 via a gas pipe, passing through the gas pump 52, the gas throttle valve 53, and the gas flow meter 54 respectively. The gas source assembly 51 can be an air source, a gas storage device, or other clean gas source. The gas output from the gas source assembly 51 is controlled by the gas throttle valve 53 to control the flow rate into the chamber assembly 2, so as to achieve the preset gas supply value displayed by the gas flow meter 54, thereby dynamically controlling the gas volume in the chamber assembly 2. In actual use, the total gas flow rate of the gas supply assembly 5 is set to 50 slpm.

[0039] Working process: First, fix the base 21 of chamber assembly 2 on a stable horizontal surface. Assemble each structure according to the connection sequence described above and shown in the diagram. Connect the gas phase product receiving assembly 6 and the liquid phase product receiving assembly 7 to the air outlet 24 and water outlet 25 in chamber assembly 2. Turn on the gas pump 52 in the gas supply assembly 5, allowing air to enter the air inlet 14 in the discharge assembly 1 through the gas supply pipe. The air is introduced into the cavity of chamber assembly 21 in a swirling manner. By adjusting the opening of the gas throttle valve 53 on the gas supply pipe and reading the reading of the gas flow meter 54, the air flow rate in the gas supply pipe reaches the preset gas supply value. After the gas flow meter 54 reaches the predetermined value and is in a stable state, turn on the water pump 42 in the water supply assembly 4, allowing water to enter the cavity of chamber assembly 21 through the water supply pipe. By adjusting the opening of the water throttle valve 43 on the water supply pipe and reading the reading of the water flow meter 44, the water flow rate in the water supply pipe reaches the preset water supply value. Once the water flow rate stabilizes and the water level in the chamber of the chamber assembly 21 reaches the specified height, check whether the air bubbles can connect between the two nozzles 13. If no connecting air bubbles are formed, appropriately increase the gas flow rate output by the air supply assembly 5 until connecting air bubbles appear between the two nozzles 13. Turn on (or connect) the power supply 31 and connect a current of a specific voltage (voltage and current are correlated) to the tubular electrode 11 through the power supply line.

[0040] When discharge assembly 1 is in normal operating condition, a reverse vortex sliding arc discharge phenomenon occurs at the nozzle 13 of a single discharge assembly 1. The reverse vortex sliding arc utilizes the swirling motion of gas to form rotating vortices between the tubular electrodes 11, transforming the "two-dimensional" discharge of a conventional sliding arc into a "three-dimensional" discharge. The gas flows through the discharge region for a longer time, increasing plasma / gas / liquid contact. As the current increases, the Lorentz force generated by the interaction between the intrinsic magnetic field of the axial portion of the arc and the radial portion causes the arc to be axially elongated. When the current reaches a certain value, the two independent arcs come into contact with each other, forming a connecting channel between the two tubular electrodes, realizing the transformation from a non-transfer arc to a transfer arc, thereby further increasing the contact area between plasma / gas / liquid. Considering all these factors, the innovative design of the reverse vortex sliding arc structure greatly enhances the effective collision between plasma, gas, and water, improving the conversion efficiency of nitrogen fixation.

[0041] This invention utilizes a symmetrically distributed reverse vortex sliding arc discharge device to form a stable discharge channel between two tubular electrodes 11 under appropriate current conditions. Air is introduced into the water flow chamber in a swirling manner, causing N2 and O2 in the air to form active nitrogen species (N2+) primarily excited by vibration and rotation under the influence of high-energy electrons. * ) and reactive oxygen species (O2) * At the same time, water molecules are also dissociated and activated by high-energy free electrons to form H+. + OH- Active particles such as O and H2. Activated particles, such as H... + OH - H2O2 and H2 react directly with N2 * and O2 * The reaction forms nitrogen oxides, ultimately generating ionic nitrogen-fixing products such as NH4. + and NO x * This enables the production of gaseous nitrogen oxides and activated aquatic products.

[0042] Example 1: The power supply component 3 provides different current values ​​to the tubular electrode 11 to obtain different nitrogen fixation energy consumption values, thereby obtaining the nitrogen fixation energy consumption under the nitrogen fixation device.

[0043] (A1) Power supply component 3 provides a current of 0.4A to tubular electrode 11:

[0044] S1-1: Start the air supply component 5 and adjust the air flow rate to 50 slpm, that is, the air flow rate of a single tubular electrode 11 is 25 slpm.

[0045] S1-2: Start the water supply component 4, adjust the water flow rate to 5 slpm, and wait for a period of time for the water level in the chamber of the chamber component 2 to stabilize.

[0046] S1-3: Start power supply component 3 and gradually increase the current until it reaches 0.4A.

[0047] S1-4: Connect the gas phase product receiving component 6 and the liquid phase product receiving component 7.

[0048] Beneficial effects: When the nitrogen fixation unit is in normal working condition, the N2 conversion rate is 0.59%, and the nitrogen-containing product production rate reaches 1.23 mol / h.

[0049] After obtaining nitrogen fixation products, the energy consumption for nitrogen fixation can be calculated using the following formula:

[0050]

[0051] In the formula: EC is the nitrogen fixation energy consumption, in MJ / mol; P is the plasma discharge power, in kW; pro is the total production rate of N atoms, in mol / h, which includes NO in the gas. x Production rate and NO in water x * and NH4 + The sum of their production rates.

[0052] Calculations show that the nitrogen fixation energy consumption in this embodiment is 3.26 MJ / mol under a current of 0.4 A.

[0053] (A3) Power supply component 3 provides a current of 0.6A to tubular electrode 11:

[0054] S2-1: Start the air supply component 5 and adjust the air flow rate to 50 slpm, that is, the air flow rate of a single tubular electrode 11 is 25 slpm.

[0055] S2-2: Start the water supply component 4, adjust the water flow rate to 5 slpm, and wait for a period of time for the water level in the chamber of the chamber component 2 to stabilize.

[0056] S2-3: Start power supply component 3 and gradually increase the current until it reaches 0.6A.

[0057] S2-4: Connect the gas phase product receiving component 6 and the liquid phase product receiving component 7.

[0058] Beneficial effects: When the equipment is in normal working condition, the N2 conversion rate can reach 1.63%, and the nitrogen-containing product production rate can reach 3.41 mol / h.

[0059] After obtaining nitrogen fixation products, the energy consumption for nitrogen fixation can be calculated using the following formula:

[0060]

[0061] Calculations show that the nitrogen fixation energy consumption of this invention under a current of 0.6A is only 2.21 MJ / mol, which is the optimal value for the plasma nitrogen fixation device in this embodiment.

[0062] (A3) Power supply component 3 provides a current of 0.8A to tubular electrode 11:

[0063] S3-1: Start the air supply component 5 and adjust the air flow rate to 50 slpm, that is, the air flow rate of a single tubular electrode 11 is 25 slpm.

[0064] S3-2: Start the water supply component 4, adjust the water flow rate to 5 slpm, and wait for a period of time for the water level in the chamber of the chamber component 2 to stabilize.

[0065] S3-3: Start power supply component 3 and gradually increase the current until it reaches 0.8A.

[0066] S3-4: Connect gas phase product receiving component 6 and liquid phase product receiving component 7.

[0067] Beneficial effects: When the equipment is in normal working condition, the N2 conversion rate can reach 1.89%, and the nitrogen-containing product production rate can reach 3.94 mol / h.

[0068] After obtaining nitrogen fixation products, the energy consumption for nitrogen fixation can be calculated using the following formula:

[0069]

[0070] Calculations show that the nitrogen fixation energy consumption of this invention under a current of 0.8A is 2.34 MJ / mol.

[0071] Through the experimental comparisons in (1-1) to (1-3) of Example 1, the power supply component 3 provides different current values ​​to the tubular electrode 11, and the results for nitrogen fixation energy consumption are different. When the current is 0.6A, it is the optimal value for the plasma nitrogen fixation device in this embodiment.

[0072] Example 2

[0073] As can be seen from Example 1 (A2), under the condition of a current of 0.6A, the nitrogen fixation energy consumption of the present invention is the best value in the atmospheric pressure plasma reactor, which has great application potential. Example 2 will explore the application of activated water in agricultural production.

[0074] Figure 4 The figures show the germination status of bean sprouts after 2 days, their growth status after 6 days, and their average stem length under different activated water ratios (different ratios of activated water to tap water). The figures show that bean sprouts treated with activated water exhibited more pronounced rooting and germination, indicating that the activated water contains substances that promote seed germination and rooting. The stem length of the bean sprouts initially increased and then decreased with increasing activated water concentration. When the ratio of activated water to pure water was 1 / 2, the stem length initially increased and then decreased with increasing activated water concentration. The average stem length was highest at this ratio, reaching 9.36 cm. Based on the solution composition mentioned earlier, the plasma-activated water contained reactive nitrogen, reactive oxygen species, and NO... x * It can indeed promote the growth of bean sprouts to some extent.

[0075] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A reverse vortex sliding arc underwater discharge plasma nitrogen fixation device, characterized in that, It includes a discharge assembly (1), a chamber assembly (2), a power supply assembly (3), a water supply assembly (4), a gas supply assembly (5), a gas phase product receiving assembly (6), and a liquid phase product receiving assembly (7). Two discharge components (1) are respectively set on both sides of the chamber component (2) and their output ends are inserted into the cavity of the chamber component (2). The output end of the power supply component (3) is connected to the two discharge components (1). The output end of the water supply component (4) is connected to the cavity of the chamber component (2). The output end of the gas supply component (5) is connected to the discharge component (1). The gas output by the gas supply component (5) is input into the cavity of the chamber component (2) through the output end of the discharge component (1). The gas phase product receiving component (6) and the liquid phase product receiving component (7) are both connected to the chamber component (2). The discharge assembly (1) includes a tubular electrode (11), a discharge connector (12) and a nozzle (13). The tubular electrode (11) is connected to the nozzle (13) through the discharge connector (12). An air inlet (14) is opened on the discharge connector (12). The air inlet (14) is connected to the nozzle (13). The output end of the air supply assembly (5) is connected to the air inlet (14). The discharge method of the discharge component (1) is reverse vortex sliding arc underwater transfer arc discharge. The two discharge components (1) are arranged symmetrically with respect to the central axis of the chamber component (2). The positions of the two discharge components (1) are horizontal and at the same height. The water supply assembly (4) includes a water source assembly (41), a water pump (42), a water throttle valve (43), and a water flow meter (44). The output end of the water source assembly (41) is connected to the water inlet (26) on the chamber assembly (2) through a water pipe via the water pump (42), the water throttle valve (43), and the water flow meter (44). The water inlet (26) is located between two nozzles (13). The gas supply assembly (5) includes a gas source assembly (51), a gas pump (52), a gas throttle valve (53) and a gas flow meter (54). The output end of the gas source assembly (51) is connected to the air inlet (14) on two discharge connectors (12) through a gas pipe via the gas pump (52), the gas throttle valve (53) and the gas flow meter (54). The chamber assembly (2) includes a base (21), a housing (22) and a cover plate (23). The housing (22) is disposed on the base (21), and the cover plate (23) is disposed above the housing (22). The space formed by the base (21), the housing (22) and the cover plate (23) serves as the cavity of the chamber assembly (2). The shell (22) is provided with an air outlet (24), a water outlet (25) and a water inlet (26). The water outlet (25) is located in the upper half of the shell (22), the water inlet (26) is located in the lower half of the shell (22), the air outlet (24) is located on the cover plate (23), the gas phase product receiving component (6) is connected to the air outlet (24), and the liquid phase product receiving component (7) is connected to the water outlet (25).

2. The reverse vortex sliding arc underwater discharge plasma nitrogen fixation device according to claim 1, characterized in that, The power supply component (3) includes a power supply (31) and a voltage regulating unit (32). The output end of the power supply (31) is connected to two tubular electrodes (11) through the voltage regulating unit (32).

3. The nitrogen fixation method of the underwater discharge plasma nitrogen fixation device with reverse vortex sliding arc according to claim 1, characterized in that, Includes the following steps: The chamber assembly (2) is set horizontally, and gas is supplied to the chamber of the chamber assembly (2) through the gas supply assembly (5) until the gas supply reaches the preset value; Water is supplied to the cavity of the chamber assembly (2) through the water supply assembly (4) until the water flow rate reaches the preset water supply value; Detect whether a connecting bubble appears between the output terminals of the two discharge components (1) in the cavity of the chamber assembly (2); If a connected bubble appears, power is supplied to the discharge assembly (1) through the power supply assembly (3), and the gas phase product receiving assembly (6) and the liquid phase product receiving assembly (7) are connected to the chamber assembly (2). If no connected bubbles appear, increase the gas flow rate output by the gas supply component (5) until connected bubbles appear.

Images