Nitric oxide flashback balance test device

Abstract

The present invention discloses a nitric oxide backfire balance test device, comprising a plasma generator, a cooler, a first detection device, and a second detection device. The plasma generator is used to heat nitrogen and oxygen so that the nitrogen and oxygen generate nitric oxide at high temperature. The heat medium inlet is connected to the gas outlet. The cooler is used to cool the gas discharged from the plasma generator. The first detection device is used to detect the nitric oxide content entering the plasma generator, and the second detection device is used to detect the nitric oxide content after cooling discharged from the cooler. The nitric oxide backfire balance test device of the present invention can be used to study the backfire balance of thermal nitric oxide, provide technical support for reducing the nitrogen oxide content in the flue gas of coal-fired boilers, help further optimize boiler emission control technology, help achieve near-zero emissions of coal-fired boilers, and reduce environmental pollution.

Description

Technical Field

[0001] This invention relates to a nitric oxide backfire test apparatus, specifically a nitric oxide backfire equilibrium test apparatus. Background Technology

[0002] During combustion in a coal-fired boiler, nitrogen and oxygen react to form thermal nitric oxide (NOx) under high-temperature conditions, leading to a continuous increase in NOx content in the flue gas. Since the reaction of thermal nitric oxide is reversible, introducing a certain amount of nitric oxide into the boiler can suppress its production, achieving a dynamic balance and preventing its continuous increase. This reduces NOx content in the flue gas, improves purification efficiency, and achieves near-zero emissions. However, no experimental apparatus exists to investigate the thermal nitric oxide backfire balance, hindering further research into its underlying principles. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention provide a nitric oxide backfire equilibrium test apparatus.

[0005] The nitric oxide flashback equilibrium test apparatus of this invention includes a plasma generator, a cooler, a first detection device, and a second detection device. The plasma generator has an oxygen inlet, a nitrogen inlet, a nitric oxide inlet, and a gas outlet. The plasma generator is used to heat nitrogen and oxygen to generate nitric oxide at high temperature.

[0006] The cooler has a hot medium inlet, a hot medium outlet, a cold medium inlet, and a cold medium outlet. The hot medium inlet is connected to the gas outlet. The cooler is used to cool the gas discharged from the plasma generator.

[0007] The first detection device is located at the nitric oxide inlet and is used to detect the nitric oxide content entering the plasma generator. The second detection device is located at the heat medium outlet and is used to detect the nitric oxide content discharged from the cooler after cooling.

[0008] In some embodiments, a first pipeline is provided between the gas outlet and the heat medium inlet, and a first control valve is provided on the first pipeline for controlling the opening and closing of the first pipeline.

[0009] In some embodiments, the cooling medium of the cooler is air.

[0010] In some embodiments, the nitric oxide backfire balance test apparatus of the present invention further includes an adsorption regenerator and a gas storage tank. The adsorption regenerator has an air inlet, an exhaust port and a nitric oxide outlet. The air inlet is connected to the heat medium outlet. The adsorption regenerator uses an adsorbent to adsorb nitric oxide in the gas and heats and desorbs the saturated adsorbent to regenerate the nitric oxide. The exhaust port is used to discharge the adsorbed gas. The nitric oxide outlet is connected to the gas storage tank to store the discharged nitric oxide in the gas storage tank.

[0011] In some embodiments, a second pipeline is provided between the heat medium outlet and the air inlet, and a second control valve is provided on the second pipeline. The second control valve is used to control the opening and closing of the second pipeline, and the second detection device is provided on the second pipeline.

[0012] In some embodiments, a third pipeline is provided at the exhaust port, and a third control valve is provided on the third pipeline, the third control valve being used to control the opening and closing of the third pipeline.

[0013] In some embodiments, the gas storage tank is connected to the nitric oxide inlet to supply nitric oxide gas to the plasma generator.

[0014] In some embodiments, a fourth pipeline is provided between the gas storage tank and the nitric oxide inlet, and a fourth control valve is provided on the fourth pipeline to control the opening and closing of the fourth pipeline. The first detection device is provided on the fourth pipeline.

[0015] In some embodiments, the adsorption regenerator includes a regenerator body and a heating element, the heating element being disposed on the outer wall surface of the regenerator body.

[0016] In some embodiments, the heating element is a heating band, and there are multiple heating bands arranged at intervals along the length direction of the regenerator body, and the heating bands are arranged circumferentially around the regenerator body.

[0017] The nitric oxide re-ignition balance test apparatus of this invention uses two detection devices to detect the input and output content of nitric oxide separately, which can more accurately control the experimental process and improve the reliability of the experimental results. By adjusting the input amount of nitric oxide in the plasma generator, it can be used to study the re-ignition balance of thermal nitric oxide, providing technical support for reducing the content of nitrogen oxides in flue gas from coal-fired boilers, helping to further optimize boiler emission control technology, and contributing to the realization of near-zero emissions from coal-fired boilers, thus reducing environmental pollution. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the nitric oxide backfire equilibrium test apparatus according to an embodiment of the present invention.

[0019] Figure label:

[0020] 100. Nitric Oxide Reignition Balance Test Apparatus; 1. Plasma Generator; 101. Oxygen Inlet; 102. Nitrogen Inlet; 103. Nitric Oxide Inlet; 104. Gas Outlet; 2. Cooler; 201. Hot Medium Inlet; 202. Hot Medium Outlet; 203. Cold Medium Inlet; 204. Cold Medium Outlet; 3. First Detection Device; 4. Second Detection Device; 5. First Pipeline; 6. First Control Valve; 7. Adsorption Regenerator; 701. Air Inlet; 702. Exhaust Port; 703. Nitric Oxide Outlet; 704. Generator Body; 705. Heating Component; 8. Gas Storage Tank; 9. Second Pipeline; 10. Second Control Valve; 11. Third Pipeline; 12. Third Control Valve; 13. Fourth Pipeline; 14. Fourth Control Valve. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figure 1 As shown, the nitric oxide flashback equilibrium test apparatus 100 of this embodiment includes a plasma generator 1, a cooler 2, a first detection device 3, and a second detection device 4. The plasma generator 1 has an oxygen inlet 101, a nitrogen inlet 102, a nitric oxide inlet 103, and a gas outlet 104. The plasma generator 1 is used to heat nitrogen and oxygen to generate nitric oxide at high temperature. The cooler 2 has a hot medium inlet 201, a hot medium outlet 202, a cold medium inlet 203, and a cold medium outlet 204. The hot medium inlet 201 is connected to the gas outlet 104, and the cooler 2 is used to cool the gas discharged from the plasma generator 1. The first detection device 3 is located at the nitric oxide inlet 103 and is used to detect the nitric oxide content entering the plasma generator 1. The second detection device 4 is located at the hot medium outlet 202 and is used to detect the content of cooled nitric oxide discharged from the cooler 2.

[0023] In the nitric oxide re-ignition equilibrium test apparatus 100 of the present invention, nitrogen and oxygen are first introduced into the plasma generator 1 through oxygen inlet 101 and nitrogen inlet 102. Under high temperature conditions, nitrogen and oxygen react within the plasma generator 1 to generate nitric oxide. A first detection device 3 detects the nitric oxide content entering the plasma generator 1 at the nitric oxide inlet 103 to ensure accurate control of the nitric oxide input during the experiment. The nitric oxide gas generated in the plasma generator 1 enters the cooler 2 through the gas outlet 104. The cooler 2 introduces hot and cold media through hot medium inlet 201 and cold medium inlet 203 to cool the high-temperature gas and lower its temperature. A second detection device 4 detects the nitric oxide content discharged from the cooler 2 at the hot medium outlet 202 to evaluate the nitric oxide re-ignition equilibrium effect.

[0024] The nitric oxide re-ignition balance test apparatus 100 of this invention uses two detection devices to detect the input and output content of nitric oxide, which can more accurately control the experimental process and improve the reliability of the experimental results. By adjusting the input amount of nitric oxide in the plasma generator 1, it can be used to study the re-ignition balance of thermal nitric oxide, providing technical support for reducing the content of nitrogen oxides in flue gas from coal-fired boilers, helping to further optimize boiler emission control technology, and contributing to the realization of near-zero emissions from coal-fired boilers, thus reducing environmental pollution.

[0025] Optionally, a first pipeline 5 is provided between the gas outlet 104 and the heat medium inlet 201, and a first control valve 6 is provided on the first pipeline 5. The first control valve 6 is used to control the opening and closing of the first pipeline 5.

[0026] In some embodiments, the cooling medium of cooler 2 is air. Using air as the cooling medium reduces the need for water or other coolants, lowers energy consumption, and eliminates wastewater discharge, thus benefiting environmental protection. Air is a free resource, and using it as the cooling medium reduces operating costs and improves economic efficiency.

[0027] In some embodiments, the nitric oxide backfire balance test apparatus 100 of this invention further includes an adsorption regenerator 7 and a gas storage tank 8. The adsorption regenerator 7 has an inlet 701, an outlet 702, and a nitric oxide outlet 703. The inlet 701 is connected to a heat medium outlet 202. The adsorption regenerator 7 utilizes an adsorbent to adsorb nitric oxide from the gas and heats it to desorb and regenerate the saturated adsorbent, thereby regenerating the nitric oxide. The outlet 702 is used to discharge the adsorbed gas, and the nitric oxide outlet 703 is connected to the gas storage tank 8 to store the discharged nitric oxide in the gas storage tank 8.

[0028] The adsorption regenerator 7 is connected to the heat medium outlet 202 of the cooler 2 through the air inlet 701, and receives the gas cooled by the cooler 2. The adsorption regenerator 7 is filled with an adsorbent that can adsorb nitrogen monoxide in the gas.

[0029] During the adsorption process, nitric oxide is captured by the adsorbent, and the purified gas is discharged from the exhaust port 702. When the adsorbent is saturated, it is regenerated by heating and desorption, releasing nitric oxide and thus achieving nitric oxide regeneration.

[0030] Nitric oxide outlet 703 is connected to gas storage tank 8. The regenerated nitric oxide enters gas storage tank 8 through nitric oxide outlet 703. Gas storage tank 8 is used to store the regenerated nitric oxide for subsequent experiments or treatment.

[0031] The nitric oxide flashback equilibrium test apparatus 100 of this invention, through the adsorption regenerator 7, can effectively recover and regenerate nitric oxide, reducing losses and improving resource utilization. The adsorption process can remove nitric oxide from the cooled gas, purifying the exhaust gas and reducing environmental pollution. The gas storage tank 8 allows the experimenter to flexibly use and store the regenerated nitric oxide, providing more operational space for the experiment. Storing nitric oxide in the gas storage tank 8 can prevent accidental leakage of nitric oxide in the system, improving experimental safety. The nitric oxide in the gas storage tank 8 can be used for subsequent experiments or treatments, for example, for further purification or use in other chemical reactions, increasing the practical value of the apparatus.

[0032] Optionally, a second pipeline 9 is provided between the heat medium outlet 202 and the air inlet 701, and a second control valve 10 is provided on the second pipeline 9. The second control valve 10 is used to control the opening and closing of the second pipeline 9, and a second detection device 4 is provided on the second pipeline 9.

[0033] Optionally, a third pipe 11 is provided at the exhaust port 702, and a third control valve 12 is provided on the third pipe 11. The third control valve 12 is used to control the opening and closing of the third pipe 11.

[0034] In some embodiments, the gas storage tank 8 is connected to the nitric oxide inlet 103 to supply nitric oxide gas to the plasma generator 1.

[0035] Nitric oxide obtained through the regeneration process in adsorption regenerator 7 is stored in storage tank 8. Storage tank 8 not only stores nitric oxide but also acts as a buffer, ensuring a stable supply. When plasma generator 1 requires nitric oxide for experiments, the nitric oxide in storage tank 8 is fed into plasma generator 1 through nitric oxide inlet 103. In this way, plasma generator 1 can use the nitric oxide already prepared in storage tank 8 for experiments. The connection between storage tank 8 and nitric oxide inlet 103 allows nitric oxide to circulate within the system, forming a closed loop, which helps achieve dynamic balance control of nitric oxide.

[0036] This design reduces the filling and unloading time of nitric oxide, improving experimental efficiency. Thanks to the buffering effect of the gas storage tank 8, a stable supply of nitric oxide can be obtained in the plasma generator 1 even during adsorption and desorption processes. The recycling of nitric oxide reduces the need for fresh gas, saving experimental costs.

[0037] Optionally, a fourth pipeline 13 is provided between the gas storage tank 8 and the nitric oxide inlet 103. A fourth control valve 14 is provided on the fourth pipeline 13. The fourth control valve 14 is used to control the opening and closing of the fourth pipeline 13. The first detection device 3 is provided on the fourth pipeline 13.

[0038] In some embodiments, the adsorption regenerator 7 includes a regenerator body and a heating element 705, the heating element 705 being disposed on the outer wall surface of the regenerator body.

[0039] The regenerator body is the core component of the adsorption regenerator 7, containing adsorbent for adsorbing nitrogen monoxide from the gas. A heating element 705 is installed on the outer wall of the regenerator body to heat the adsorbent, thereby regenerating it by desorbing nitrogen monoxide at high temperature after the adsorbent reaches saturation.

[0040] In some embodiments, the heating element 705 is a heating band, and there are multiple heating bands. The multiple heating bands are arranged at intervals along the length direction of the regenerator body and are arranged circumferentially around the regenerator body.

[0041] The heating element 705 can be multiple heating bands, not just one. These heating bands are spaced apart along the length of the regenerator body and surround the circumference of the regenerator body. This arrangement ensures more uniform heating and improves regeneration efficiency. The spacing and surrounding arrangement of multiple heating bands ensure the uniformity of the heating process, which helps to improve the regeneration effect of the adsorbent. Uniform heating allows for faster and more thorough desorption of saturated nitric oxide in the adsorbent, thereby improving the regeneration efficiency of the adsorbent. Uniform heating reduces the risk of adsorbent performance degradation due to local overheating or underheating, improving the reliability and stability of the system. The arrangement of the heating bands facilitates the experimenter's control of the heating process, allowing for precise temperature control by adjusting the opening and closing of the heating bands. The design of the heating bands makes the heating method more flexible, allowing adjustments to be made according to experimental needs and the characteristics of the adsorbent to achieve the best regeneration effect.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A nitric oxide flashback equilibrium test apparatus, characterized in that, include: A plasma generator (1) has an oxygen inlet (101), a nitrogen inlet (102), a nitric oxide inlet (103), and a gas outlet (104). The plasma generator (1) is used to heat nitrogen and oxygen to generate nitric oxide at high temperature. Cooler (2), the cooler (2) has a hot medium inlet (201), a hot medium outlet (202), a cold medium inlet (203) and a cold medium outlet (204), the hot medium inlet (201) is connected to the gas outlet (104), and the cooler (2) is used to cool the gas discharged from the plasma generator (1); The first detection device (3) and the second detection device (4) are provided at the nitric oxide inlet (103) for detecting the nitric oxide content entering the plasma generator (1) and the second detection device (4) is provided at the heat medium outlet (202) for detecting the nitric oxide content discharged from the cooler (2) after cooling.

2. The nitric oxide flashback equilibrium test apparatus according to claim 1, characterized in that, A first pipeline (5) is provided between the gas outlet (104) and the heat medium inlet (201), and a first control valve (6) is provided on the first pipeline (5). The first control valve (6) is used to control the opening and closing of the first pipeline (5).

3. The nitric oxide flashback equilibrium test apparatus according to claim 1, characterized in that, The cooling medium of the cooler (2) is air.

4. The nitric oxide flashback equilibrium test apparatus according to claim 1, characterized in that, It also includes an adsorption regenerator (7) and a gas storage tank (8). The adsorption regenerator (7) has an air inlet (701), an exhaust port (702) and a nitric oxide outlet (703). The air inlet (701) is connected to the heat medium outlet (202). The adsorption regenerator (7) uses an adsorbent to adsorb nitric oxide in the gas and heats and desorbs the adsorbent to regenerate the saturated adsorbent, so as to regenerate nitric oxide. The exhaust port (702) is used to discharge the adsorbed gas. The nitric oxide outlet (703) is connected to the gas storage tank (8) to store the discharged nitric oxide in the gas storage tank (8).

5. The nitric oxide flashback equilibrium test apparatus according to claim 4, characterized in that, A second pipeline (9) is provided between the heat medium outlet (202) and the air inlet (701). A second control valve (10) is provided on the second pipeline (9). The second control valve (10) is used to control the opening and closing of the second pipeline (9). The second detection device (4) is provided on the second pipeline (9).

6. The nitric oxide flashback equilibrium test apparatus according to claim 4, characterized in that, A third pipe (11) is provided at the exhaust port (702), and a third control valve (12) is provided on the third pipe (11). The third control valve (12) is used to control the opening and closing of the third pipe (11).

7. The nitric oxide flashback equilibrium test apparatus according to claim 4, characterized in that, The gas storage tank (8) is connected to the nitric oxide inlet (103) to provide nitric oxide gas to the plasma generator (1).

8. The nitric oxide flashback equilibrium test apparatus according to claim 7, characterized in that, A fourth pipeline (13) is provided between the gas storage tank (8) and the nitric oxide inlet (103). A fourth control valve (14) is provided on the fourth pipeline (13). The fourth control valve (14) is used to control the opening and closing of the fourth pipeline (13). The first detection device (3) is provided on the fourth pipeline (13).

9. The nitric oxide flashback equilibrium test apparatus according to claim 4, characterized in that, The adsorption regenerator (7) includes a regenerator body (704) and a heating element (705), wherein the heating element (705) is disposed on the outer wall surface of the regenerator body (704).

10. The nitric oxide flashback equilibrium test apparatus according to claim 9, characterized in that, The heating element (705) is a heating band, and there are multiple heating bands. The multiple heating bands are arranged at intervals along the length direction of the regenerator body (704), and the heating bands are arranged around the circumference of the regenerator body (704).

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