Nitrogen oxide generation device based on gliding arc plasma

Abstract

The utility model discloses a nitric oxide generating device based on sliding arc plasma, which comprises a gas pump, a gas flow control meter, a plasma reaction chamber and a gas cooling chamber, the plasma reaction chamber comprises an inner electrode group, an outer electrode group and an annular magnet; the inner electrode group comprises an inner electrode, a first water pump, a first storage chamber and a first condenser, the inner electrode comprises an inner electrode body and a first cooling water circulation channel, the inner electrode body is of a cone-like structure, and the first cooling water circulation channel is arranged in the inner electrode body; the device provided by the utility model has the advantages of mild reaction conditions, low energy consumption, environmental protection and the like.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen oxide preparation technology, and in particular to a nitrogen oxide generation device based on sliding arc plasma. Background Technology

[0002] Currently, the generation of nitrogen oxides usually relies on high-temperature combustion or catalytic reactions, which have problems such as high energy consumption, low efficiency, and environmental pollution. Utility Model Content

[0003] This invention provides a nitrogen oxide generation device based on sliding arc plasma, which includes a gas pump, a gas flow controller, a plasma reaction chamber, and a gas cooling chamber.

[0004] The plasma reaction chamber includes an inner electrode assembly, an outer electrode assembly, and a ring magnet;

[0005] The inner electrode assembly includes an inner electrode, a first water pump, a first storage chamber, and a first condenser. The inner electrode includes an inner electrode body and a first cooling water circulation path. The inner electrode body has a cone-shaped structure. The first cooling water circulation path is located inside the inner electrode body and has an inner electrode cooling water inlet and an inner electrode cooling water outlet. The first condenser is connected to the first storage chamber, the first storage chamber is connected to the first water pump, and the first water pump is connected to the inner electrode cooling water inlet of the first cooling water circulation path.

[0006] The external electrode assembly includes an external electrode, a second water pump, a second storage chamber, and a second condenser. The external electrode includes an external electrode body and a second cooling water circulation passage. The external electrode body includes a first hollow cylinder and a second hollow cylinder. The inner diameter of the first hollow cylinder is larger than the inner diameter of the second hollow cylinder. The first hollow cylinder is fitted onto the second hollow cylinder. A second cooling water circulation passage is provided between the inside of the first hollow cylinder and the outside of the second hollow cylinder. A ring magnet is fitted onto the outside of the second hollow cylinder. The second cooling water circulation passage has an external electrode cooling water inlet and an external electrode cooling water outlet. The second hollow cylinder has a plasma air inlet and a plasma air outlet.

[0007] The air pump is used to absorb air and is connected to the plasma inlet; the plasma outlet is connected to the gas cooling chamber.

[0008] Preferably, the first cooling water circulation passage is detachably placed in the inner electrode body via a bolt structure.

[0009] Preferably, the plasma inlet is located at the bottom of the inner electrode body with a cone-shaped structure, and the annular magnet is located at the top of the inner electrode body.

[0010] Preferably, the top of the inner electrode is fixed to the second hollow cylinder by a ceramic positioning plate, and one end of the second hollow cylinder is sealed by a flange.

[0011] Preferably, the inner electrode body and the outer electrode body are connected to a frequency converter and a voltage converter, which are used to adjust the input voltage of the plasma chamber.

[0012] Preferably, a gas flow controller is provided on the connecting pipe between the gas pump and the plasma inlet.

[0013] This invention discloses a nitrogen oxide generation device based on sliding arc plasma, which has advantages such as mild reaction conditions, low energy consumption, and environmental friendliness. The unique reactor design of this invention, combined with the autonomous adjustment of frequency, flow rate, and voltage parameters, reduces energy consumption. Compared with traditional plasma technology, the sliding arc plasma technology of this invention has the advantage of lower energy consumption at a frequency of 5000Hz and an inlet flow rate of 4.58 h / m³. 3 Under an input voltage of 3880V, the minimum energy consumption is 1.03 MJ / mol. N It possesses excellent technological advancements.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the disclosure of this utility model. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a block diagram of the overall structure of the nitrogen oxide generation device based on sliding arc plasma of this utility model;

[0018] Figure 2 This is a schematic diagram of the plasma reaction chamber structure provided by this utility model;

[0019] Figure 3 A schematic diagram of the internal electrode structure provided by this utility model;

[0020] Figure 4 A schematic diagram of the external electrode structure provided by this utility model;

[0021] Figure 5 This is a schematic diagram of coolant and air flow provided by this utility model;

[0022] Figure 6 This is a schematic diagram showing the effect of frequency on the generation and energy consumption of nitric oxide and nitrogen dioxide in the embodiments of this utility model;

[0023] Figure 7 This is a schematic diagram showing the effect of voltage on the generation and energy consumption of nitric oxide and nitrogen dioxide in the embodiments of this utility model;

[0024] Figure 8 This is a schematic diagram showing the effect of air intake flow rate on the generation of nitric oxide and nitrogen dioxide and energy consumption in an embodiment of this utility model. Detailed Implementation

[0025] The present invention will be further explained below with reference to specific implementation schemes, but this is not intended to limit the scope of protection of the present invention.

[0026] like Figure 1-4 As shown, this utility model provides a nitrogen oxide generation device based on sliding arc plasma, including a gas pump 1, a gas flow controller 2, a plasma reaction chamber, and a gas cooling chamber 4;

[0027] The air pump is used to draw in air;

[0028] The plasma reaction chamber is used to generate nitrogen oxides;

[0029] The gas cooling chamber is used to cool the nitrogen oxides output from the plasma chamber.

[0030] The plasma reaction chamber includes an inner electrode assembly, an outer electrode assembly, and a ring magnet;

[0031] like Figure 3 As shown, the inner electrode assembly includes an inner electrode 5, a first water pump, a first storage chamber, and a first condenser. The inner electrode 5 includes an inner electrode body 9 and a first cooling water circulation passage 10. The inner electrode body 9 has a cone-like structure. The first cooling water circulation passage 10 is placed inside the inner electrode body. The first cooling water circulation passage 10 is provided with an inner electrode cooling water inlet 11 and an inner electrode cooling water outlet 12. The first condenser 8 is connected to the first storage chamber. The first storage chamber is connected to the first water pump. The first water pump is connected to the inner electrode cooling water inlet 11 of the first cooling water circulation passage 10.

[0032] like Figure 4As shown, the external electrode assembly includes an external electrode 13, a second water pump, a second storage chamber, and a second condenser. The external electrode 13 includes an external electrode body 15 and a second cooling water circulation passage 16. The external electrode body 15 includes a first hollow cylinder 17 and a second hollow cylinder 18. The inner diameter of the first hollow cylinder 17 is larger than the inner diameter of the second hollow cylinder 18. The first hollow cylinder 17 is fitted over the second hollow cylinder 18. A second cooling water circulation passage 182 is provided between the inside of the first hollow cylinder 17 and the outside of the second hollow cylinder 18. A ring magnet 181 is fitted over the second hollow cylinder 18. The second cooling water circulation passage 16 is provided with an external electrode cooling water inlet 19 and an external electrode cooling water outlet 20. The second hollow cylinder 18 is provided with a plasma air inlet 21 and a plasma air outlet 22.

[0033] The air pump is used to absorb air and is connected to the plasma air inlet 21; the plasma air outlet 22 is connected to the gas cooling chamber 4.

[0034] The first cooling water circulation passage 10 is detachably placed in the inner electrode body via a bolt structure 101.

[0035] The plasma inlet 21 is located at the bottom of the inner electrode body 9, which has a cone-like structure, and the annular magnet 181 is located at the top of the inner electrode body 9.

[0036] The top end of the inner electrode 5 is fixed inside the second hollow cylinder 18 by a ceramic positioning plate 23, and one end of the second hollow cylinder 18 is sealed by a flange 24.

[0037] like Figure 5 As shown, the structure of the inner electrode in this embodiment, which resembles a "cone," allows an electric arc to be generated at the widest point of the inner electrode, 5 mm away from the inner wall of the outer electrode. The radius of the inner electrode then gradually decreases, allowing the electric arc to react fully with the air. As air flows in, it "pushes" the electric arc to the ring magnet, which causes the arc to rotate at a specific position, increasing the arc's residence time and making the electrolysis of air more complete, producing more products, and reducing energy consumption. In addition, the unique inner and outer electrode structure (with internal condensate) allows the reactor to react and dissipate heat simultaneously.

[0038] The plasma chamber provided by this utility model adopts sliding arc discharge. When a voltage is applied between two electrodes, plasma is formed. Under the action of a magnet, the generated arc rotates at a fixed height, ionizing the nitrogen and oxygen in the input air into free nitrogen and oxygen atoms, which combine to form nitric oxide. In the plasma chamber and gas cooling chamber, the nitric oxide further reacts with the air to generate nitrogen dioxide.

[0039] The device of this utility model also includes a frequency converter and a voltage converter, wherein the frequency converter is used to adjust the frequency (0-10000Hz) and the voltage (0-537.2V) and the switching equipment transformer is used to increase the input voltage;

[0040] The device of this invention includes a gas flow controller, which is installed on the connecting pipe between the gas pump and the plasma inlet. The gas flow controller is used to adjust the gas flow parameters, with a gas flow range of 0-5.87 h / m³. 3 ;

[0041] This invention also provides a method for generating nitrogen oxides based on sliding arc plasma. A gas pump absorbs air, a gas flow controller regulates the inlet flow rate, and then the gas enters the plasma chamber for full reaction, ionizing the nitrogen and oxygen in the air. The free nitrogen and oxygen recombine to generate nitric oxide and nitrogen dioxide. The generated gas is cooled by a gas cooling chamber, where the nitric oxide gas continues to react with oxygen to generate nitrogen dioxide. The amount and ratio of nitric oxide and nitrogen dioxide generated in the plasma chamber can be changed by adjusting the frequency, inlet flow rate, and voltage parameters.

[0042] The effects of frequency, intake flow rate, and voltage on the generation and energy consumption of nitric oxide and nitrogen dioxide were investigated. The results showed that changing the intake flow rate, voltage, and frequency affected the generation and energy consumption of nitric oxide and nitrogen dioxide. The results are as follows: Figure 6-8 As shown. Figure 6 The frequency is 5000 Hz, and the flow rate is 4.58 m³ / s. 3 At a rate of / h, adjusting the voltage to 6000V, 4840V, 4080V, or 3880V can adjust the concentration of nitrogen oxides produced and the energy consumption. Figure 7 The display shows that at a frequency of 5000Hz and a voltage of 3880V, the airflow is adjusted to 1.52m³ / h. 3 / h, 2.58m 3 / h, 3.52m 3 / h, the concentration of nitrogen oxides produced and the energy consumption can be adjusted; Figure 8 The operating voltage is 3880V, and the air flow rate is 4.58m³ / h. 3 / h, with adjustable frequencies of 3000Hz, 4000Hz, 5000Hz, etc., which can adjust the concentration of nitrogen oxides and energy consumption.

[0043] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0044] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A nitrogen oxides generating apparatus based on a sliding arc plasma, characterized in that, Includes an air pump (1), a gas flow controller (2), a plasma reaction chamber, and a gas cooling chamber (4); The plasma reaction chamber includes an inner electrode assembly, an outer electrode assembly, and a ring magnet; The inner electrode assembly includes an inner electrode (5), a first water pump, a first storage chamber, and a first condenser. The inner electrode (5) includes an inner electrode body (9) and a first cooling water circulation passage (10). The inner electrode body (9) has a cone-shaped structure. The first cooling water circulation passage (10) is placed inside the inner electrode body. The first cooling water circulation passage (10) is provided with an inner electrode cooling water inlet (11) and an inner electrode cooling water outlet (12). The first condenser is connected to the first storage chamber. The first storage chamber is connected to the first water pump. The first water pump (6) is connected to the inner electrode cooling water inlet (11) of the first cooling water circulation passage (10). The external electrode assembly includes an external electrode (13), a second water pump, a second storage chamber, and a second condenser. The external electrode (13) includes an external electrode body (15) and a second cooling water circulation passage (16). The external electrode body (15) includes a first hollow cylinder (17) and a second hollow cylinder (18). The inner diameter of the first hollow cylinder (17) is larger than the inner diameter of the second hollow cylinder (18). The first hollow cylinder (17) is sleeved on the outside of the second hollow cylinder (18). A second cooling water circulation passage is provided between the inside of the first hollow cylinder (17) and the outside of the second hollow cylinder (18). A ring magnet (181) is sleeved on the second hollow cylinder (18). An external electrode cooling water inlet (19) and an external electrode cooling water outlet (20) are provided on the second cooling water circulation passage (16). A plasma air inlet (21) and a plasma air outlet (22) are provided on the second hollow cylinder (18). The air pump is used to absorb air and is connected to the plasma inlet (21); the plasma outlet (22) is connected to the gas cooling chamber (4).

2. The sliding arc plasma based nitrogen oxides generation device of claim 1, wherein, The first cooling water circulation passage (10) is detachably placed in the inner electrode body by means of a bolt structure.

3. The sliding arc plasma-based nitrogen oxide generation device of claim 1, wherein, The plasma inlet (21) is located at the bottom of the inner electrode body (9) with a "cone"-like structure, and the annular magnet (181) is located at the top of the inner electrode body (9).

4. The sliding arc plasma-based nitrogen oxide generation device of claim 1, wherein, The top of the inner electrode (5) is fixed inside the second hollow cylinder (18) by a ceramic positioning plate (23), and one end of the second hollow cylinder (18) is sealed by a flange (24).

5. The sliding arc plasma-based nitrogen oxide generation device of claim 1, wherein, It includes a frequency converter and a voltage converter, which are connected to the inner electrode body (9) and the outer electrode body (15) to adjust the input voltage of the plasma chamber.

6. The sliding arc plasma-based nitrogen oxide generation device of claim 1, wherein, The gas flow controller is provided on the connecting pipe between the gas pump and the plasma inlet (21).

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