Nitric oxide backdraft balance test device

Abstract

The invention discloses a nitric oxide backdraft balance test device which comprises a plasma generation furnace, a cooler, a first detection device and a second detection device, the plasma generation furnace is used for heating nitrogen and oxygen to enable the nitrogen and the oxygen to generate nitric oxide at high temperature, a thermal medium inlet is communicated with a gas outlet, and a gas inlet is communicated with a gas outlet. The cooler is used for cooling gas discharged by the plasma generator; the first detection device is used for detecting the content of nitric oxide entering the plasma generation furnace, and the second detection device is used for detecting the content of cooled nitric oxide discharged by the cooler. The nitric oxide backdraft balance test device can be used for studying backdraft balance of thermal nitric oxide, technical support is provided for reducing the content of nitric oxide in flue gas of a coal-fired boiler, the boiler emission control technology can be further optimized, near-zero emission of the coal-fired boiler can be achieved, and environmental pollution can be reduced.

Description

Technical Field

[0001] The invention relates to a nitric oxide flashback test device, in particular to a nitric oxide flashback balance test device. Background Art

[0002] During the combustion process of a coal-fired boiler, in the high temperature environment of the boiler, the nitrogen and oxygen in the boiler react to generate thermal nitric oxide, which will cause the nitrogen oxide content in the boiler flue gas to continue to increase. Since the reaction of thermal nitric oxide is a reversible reaction, the generation of thermal nitric oxide in the boiler can be suppressed by introducing a certain amount of nitric oxide into the boiler, thereby achieving a dynamic balance of thermal nitric oxide in the boiler and avoiding the continuous increase in the content of thermal nitric oxide, thereby reducing the nitric oxide content in the flue gas, improving the flue gas purification effect, and achieving near-zero emissions. However, in the related art, there is no experimental device to explore the device for thermal nitric oxide flashback balance, and it is impossible to further study the technical principles of nitric oxide flashback balance. Summary of the invention

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

[0004] To this end, an embodiment of the present invention provides a nitric oxide flashback balance test device.

[0005] The nitric oxide flashback balance test device of the embodiment of the present invention comprises a plasma generator, a cooler, a first detection device and a second detection device, wherein the plasma generator has an oxygen inlet, a nitrogen inlet, a nitric oxide inlet and a gas outlet, and the plasma generator is used to heat nitrogen and oxygen so that the nitrogen and oxygen generate nitric oxide at a 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, and the cooler is used to cool the gas discharged from the plasma generator;

[0007] The first detection device is arranged at the nitric oxide inlet for detecting the nitric oxide content entering the plasma generator, and the second detection device is arranged at the heat medium outlet for detecting the nitric oxide content after cooling discharged from the cooler.

[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, and the first control valve is used to control the opening and closing of the first pipeline.

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

[0010] In some embodiments, the nitric oxide flashback equilibrium test device of the embodiment of the present invention also 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 and regenerates the adsorbent saturated with adsorption to regenerate the nitric oxide, the exhaust port is used to discharge the adsorbed gas, and 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, a second control valve is provided on the second pipeline, the second control valve is used to control the on-off 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, a third control valve is provided on the third pipeline, and the third control valve is used to control the on-off of the third pipeline.

[0013] In some embodiments, the gas storage tank is in communication with the nitric oxide inlet to provide 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, a fourth control valve is provided on the fourth pipeline, the fourth control valve is used to control the on-off of the fourth pipeline, and 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, and the heating element is disposed on an outer wall surface of the regenerator body.

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

[0017] The nitric oxide flashback balance test device of the present invention detects the input and output contents of nitric oxide respectively through two detection devices, which can more accurately control the experimental process and improve the reliability of the experimental results. By regulating the input amount of nitric oxide in the plasma generator, it can be used to study the flashback balance of thermal nitric oxide, provide technical support for reducing the content of nitrogen oxides 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Schematic diagram of a nitric oxide flashback equilibrium test device according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] 100. Nitric oxide flashback balance test device; 1. Plasma generator; 101. Oxygen inlet; 102. Nitrogen inlet; 103. Nitric oxide inlet; 104. Gas outlet; 2. Cooler; 201. Heat medium inlet; 202. Heat 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 outlet; 703. Nitric oxide outlet; 704. Regenerator body; 705. Heating element; 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 DESCRIPTION

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

[0022] like Figure 1 As shown, the nitric oxide backburning balance test device 100 of the embodiment of the present invention 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 so that nitrogen and oxygen 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. The cooler 2 is used to cool the gas discharged from the plasma generator 1. The first detection device 3 is arranged at the nitric oxide inlet 103, which is used to detect the nitric oxide content entering the plasma generator 1, and the second detection device 4 is arranged at the hot medium outlet 202, which is used to detect the nitric oxide content after cooling discharged from the cooler 2.

[0023] During the test of the nitric oxide flashback balance test device 100 of the present invention, nitrogen and oxygen are first introduced into the plasma generator 1 through the oxygen inlet 101 and the nitrogen inlet 102. Under high temperature environment, nitrogen and oxygen react in the plasma generator 1 to generate nitric oxide. The first detection device 3 detects the nitric oxide content entering the plasma generator 1 at the nitric oxide inlet 103 to ensure that the input amount of nitric oxide can be accurately controlled during the experiment. The nitric oxide gas generated by the plasma generator 1 enters the cooler 2 through the gas outlet 104. The cooler 2 introduces hot medium and cold medium through the hot medium inlet 201 and the cold medium inlet 203 to cool the high-temperature gas and reduce its temperature. The 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 flashback balance effect.

[0024] The nitric oxide flashback balance test device 100 of the present invention detects the input and output contents of nitric oxide respectively through two detection devices, which can more accurately control the experimental process and improve the reliability of the experimental results. By regulating the input amount of nitric oxide in the plasma generator 1, it can be used to study the flashback balance of thermal nitric oxide, provide technical support for reducing the content of nitrogen oxides 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.

[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 on-off of the first pipeline 5 .

[0026] In some embodiments, the cooling medium of the cooler 2 is air. Using air as a cooling medium can reduce the demand for water or other coolants, reduce energy consumption, and will not produce wastewater discharge, which is beneficial to environmental protection. Air is a free resource. Using air as a cooling medium can reduce operating costs and improve economic benefits.

[0027] In some embodiments, the nitric oxide flashback balance test device 100 of the embodiment of the present invention further 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 the adsorbent to desorb and regenerate the adsorbent saturated with adsorption to regenerate the nitric oxide. The exhaust port 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, which can adsorb nitrogen monoxide in the gas.

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

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

[0031] The nitric oxide flashback equilibrium test device 100 of the embodiment of the present invention can effectively recycle and regenerate nitric oxide through the adsorption regenerator 7, reduce losses, and improve resource utilization. The adsorption process can remove nitric oxide in the cooled gas, purify the exhaust gas, and reduce environmental pollution. The provision of the gas storage tank 8 allows the experimenter to flexibly use and store the regenerated nitric oxide, providing more operating space for the experiment. By storing nitric oxide in the gas storage tank 8, accidental leakage of nitric oxide in the system can be avoided, thereby improving the safety of the experiment. The nitric oxide in the gas storage tank 8 can be used for subsequent experiments or treatments, for example, it can be further purified or used for other chemical reactions, increasing the practical value of the device.

[0032] Optionally, 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 on-off of the second pipeline 9 , and the second detection device 4 is provided on the second pipeline 9 .

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

[0034] In some embodiments, the gas storage tank 8 is in communication with the nitric oxide inlet 103 to provide nitric oxide gas to the plasma generator 1 .

[0035] The nitric oxide obtained through the regeneration process in the adsorption regenerator 7 is stored in the gas tank 8. The gas tank 8 is not only used to store nitric oxide, but also acts as a buffer to ensure a stable supply of nitric oxide. When the plasma generator 1 needs nitric oxide for experiments, the nitric oxide in the gas tank 8 is sent to the plasma generator 1 through the nitric oxide inlet 103 pipeline. In this way, the plasma generator 1 can use the nitric oxide that has been prepared in the gas tank 8 for experiments. The connection design between the gas tank 8 and the nitric oxide inlet 103 allows nitric oxide to be circulated in the system to form a closed loop, which helps to achieve dynamic balance control of nitric oxide.

[0036] This design reduces the filling and loading and unloading time of nitric oxide and improves the experimental efficiency. Through the buffering effect of the gas storage tank 8, the plasma generator 1 can obtain a stable supply of nitric oxide even during the adsorption and desorption process. The recycling of nitric oxide reduces the demand for new gas and saves 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 on-off of the fourth pipeline 13 , and the first detection device 3 is arranged on the fourth pipeline 13 .

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

[0039] The regenerator body is the core part of the adsorption regenerator 7, and is filled with an adsorbent for adsorbing nitric oxide in the gas. The heating element 705 is installed on the outer wall of the regenerator body to heat the adsorbent, so that after the adsorbent reaches a saturated state, the nitric oxide is desorbed by high temperature to achieve regeneration of the adsorbent.

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

[0041] The heating element 705 can be a heating belt, and the number of these heating belts is not just one, but multiple. These heating belts are arranged at intervals along the length direction of the regenerator body and surround the circumference of the regenerator body. Such an arrangement can ensure that the heating is more uniform and improve the regeneration efficiency. The spacing and surrounding arrangement of multiple heating belts ensure the uniformity of the heating process, which helps to improve the regeneration effect of the adsorbent. By uniform heating, the saturated nitrogen monoxide in the adsorbent can be desorbed more quickly and thoroughly, thereby improving the regeneration efficiency of the adsorbent. Uniform heating reduces the risk of deterioration of adsorbent performance due to local overheating or underheating, and improves the reliability and stability of the system. The arrangement of the heating belt makes it easy for the experimenter to control the heating process, and the opening and closing of the heating belt can be adjusted to achieve precise temperature control. The design of the heating belt makes the heating method more flexible, and can be adjusted according to the experimental requirements and the characteristics of the adsorbent to achieve the best regeneration effect.

[0042] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A nitric oxide flashback equilibrium test device, characterized in that: include: A plasma generator (1), the plasma generator (1) having an oxygen inlet (101), a nitrogen inlet (102), a nitric oxide inlet (103) and a gas outlet (104), the plasma generator (1) being used to heat nitrogen and oxygen so that the nitrogen and oxygen generate nitric oxide at a high temperature; A cooler (2), the cooler (2) having 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) being in communication with the gas outlet (104), and the cooler (2) being used to cool the gas discharged from the plasma generator (1); A first detection device (3) and a second detection device (4), wherein the first detection device (3) is arranged at the nitric oxide inlet (103) and is used to detect the content of nitric oxide entering the plasma generator (1), and the second detection device (4) is arranged at the heat medium outlet (202) and is used to detect the content of nitric oxide after cooling discharged from the cooler (2).

2. The nitric oxide flashback equilibrium test device 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 on-off of the first pipeline (5).

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

4. The nitric oxide flashback balance test device according to claim 1, characterized in that: The invention also comprises an adsorption regenerator (7) and a gas storage tank (8), wherein the adsorption regenerator (7) has an air inlet (701), an air outlet (702) and a nitric oxide outlet (703), wherein the air inlet (701) is connected to the heat medium outlet (202), and the adsorption regenerator (7) uses an adsorbent to adsorb nitric oxide in the gas and heats and desorbs and regenerates the adsorbent saturated with adsorption to regenerate the nitric oxide, wherein the air 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).

5. The nitric oxide flashback equilibrium test device 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 on-off of the second pipeline (9); and the second detection device (4) is provided on the second pipeline (9).

6. The nitric oxide flashback balance test device according to claim 4, characterized in that: A third pipeline (11) is provided at the exhaust port (702), and a third control valve (12) is provided on the third pipeline (11). The third control valve (12) is used to control the on-off of the third pipeline (11).

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

8. The nitric oxide flashback balance test device 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 on-off of the fourth pipeline (13); and the first detection device (3) is provided on the fourth pipeline (13).

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

10. The nitric oxide flashback equilibrium test device according to claim 9, characterized in that: The heating element (705) is a heating belt, and the number of the heating belts is multiple. The multiple heating belts are arranged at intervals along the length direction of the regenerator body (704), and the heating belts are arranged circumferentially around the regenerator body (704).

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