Nitric oxide laboratory on-line preparation device

Abstract

The nitric oxide laboratory online preparation device comprises an ionization box, an adsorption regeneration tower, a compressor and a gas storage tank, a positive electrode and a negative electrode are arranged on the ionization box, and the positive electrode and the negative electrode are matched to generate electric arcs; the adsorption regeneration tower is provided with an adsorbent inlet, an adsorbent outlet, an ionized gas inlet, an exhaust port and a nitric oxide outlet, the ionized gas inlet is communicated with the ionized gas outlet, a gas inlet of the compressor is communicated with the nitric oxide outlet, and a gas outlet of the compressor is communicated with the gas storage tank; nitric oxide gas discharged from the nitric oxide outlet is compressed and then stored in the gas storage tank. According to the nitric oxide laboratory online preparation device, the device structure is greatly simplified, and operation and maintenance are convenient. By means of the mode of generating nitric oxide through the electric arc, the high-temperature and high-pressure conditions in a traditional method are avoided, energy consumption is effectively reduced, the purity of nitric oxide is improved, and the requirement of a high-precision experiment is met.

Description

Technical Field

[0001] The present invention relates to the technical field of nitric oxide preparation, and in particular to a laboratory online preparation device for nitric oxide. Background Art

[0002] With the continuous deepening of scientific research, nitric oxide (NO), as an important biologically active molecule, has been widely used in many fields such as medicine, environmental science, and chemistry. However, the traditional laboratory nitric oxide gas procurement method has the following problems: Complex equipment: Existing nitric oxide gas preparation equipment usually includes multi-stage reactors, gas purification equipment, etc., with a complex structure, which is not convenient for operation and maintenance. High energy consumption: Traditional nitric oxide preparation methods usually require high temperature, high pressure and other conditions, resulting in high energy consumption and increasing the operating costs of the laboratory. Low purity: Since the preparation process may be interfered with by other gases, the purity of nitric oxide prepared by traditional methods is relatively low and cannot meet the needs of high-precision experiments. Difficulty in continuous use: Traditional nitric oxide gas procurement methods are difficult to achieve continuous use in the laboratory, and gas cylinders need to be replaced frequently, which brings inconvenience to the experiment.

[0003] Therefore, the present invention provides a laboratory online preparation device for nitric oxide, which aims to solve the problems of complex equipment, high energy consumption, low purity and difficulty in continuous use in existing methods, and meet the laboratory's demand for continuous use of nitric oxide gas. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a laboratory-based online preparation device for nitric oxide.

[0006] The laboratory online preparation device for nitric oxide in an embodiment of the present invention includes an ionization box, an adsorption regeneration tower, a compressor, and a gas storage tank. The ionization box has an air inlet and an ionized gas outlet. The ionization box is provided with a positive electrode and a negative electrode. The positive electrode and the negative electrode cooperate to generate an arc to ionize the air in the ionization box and produce nitric oxide gas.

[0007] The adsorption regeneration tower has an adsorbent inlet, an adsorbent outlet, an ionized gas inlet, an exhaust port, and a nitric oxide outlet. The ionized gas inlet is connected to the ionized gas outlet to receive the ionized gas discharged from the ionization box. The nitric oxide gas in the ionized gas is adsorbed by the adsorbent in the adsorption regeneration tower. The exhaust port is used to remove the adsorbed ionized gas. The adsorbent saturated with adsorption is heated and decomposed and regenerated in the adsorption regeneration tower. The nitric oxide outlet is used to remove the decomposed and regenerated nitric oxide gas.

[0008] The air inlet of the compressor is communicated with the nitric oxide outlet, and the air outlet of the compressor is communicated with the gas storage tank, so that the nitric oxide gas discharged from the nitric oxide outlet is compressed and stored in the gas storage tank.

[0009] In some embodiments, a heating coil and a cooling coil are provided in the adsorption regeneration tower. The heating coil has a hot medium inlet and a hot medium outlet. The heating coil is used to heat the adsorption-saturated adsorbent so that the adsorption-saturated adsorbent can be decomposed and regenerated. The cooling coil has a cold medium inlet and a cold medium outlet. The cooling coil is used to cool the decomposed and regenerated adsorbent so that the regenerated adsorbent can adsorb nitric oxide in the flue gas.

[0010] In some embodiments, the heating coil is arranged on the inner wall of the adsorption regeneration tower and is spirally arranged along the height direction of the adsorption regeneration tower; and / or the cooling coil is arranged on the inner wall of the adsorption regeneration tower and is spirally arranged along the height direction of the adsorption regeneration tower.

[0011] In some embodiments, the ionization box further has a heat exchange gas outlet and a heat exchange gas inlet, the heat exchange gas outlet is connected to the heat medium inlet, and the heat exchange gas inlet is connected to the heat medium outlet, so that part of the ionized gas discharged from the ionization box is transported to the heating coil as a heat medium.

[0012] In some embodiments, a first induced draft fan and a first on-off valve are provided between the heat exchange gas outlet and the heat medium inlet.

[0013] In some embodiments, the cooling medium delivered by the cold medium inlet is room temperature air.

[0014] In some embodiments, the laboratory online preparation device for nitric oxide of the embodiment of the present invention further includes a heat exchanger, which is arranged between the ionized gas outlet and the ionized gas inlet, and is used to heat and cool the ionized gas discharged from the ionization box and then transport it to the adsorption regeneration tower.

[0015] In some embodiments, a second induced draft fan is provided between the heat exchanger and the ionized gas inlet.

[0016] In some embodiments, a second on-off valve is provided between the ionized gas outlet and the heat exchanger.

[0017] In some embodiments, a third on-off valve is provided between the adsorption regeneration tower and the compressor.

[0018] Compared with traditional multi-stage reactors and gas purification devices, the laboratory online preparation device for nitric oxide according to the embodiment of the present invention adopts an ionization box and an adsorption regeneration tower, which greatly simplifies the device structure and is easy to operate and maintain. The method of generating nitric oxide by electric arc avoids the high temperature and high pressure conditions in traditional methods, effectively reducing energy consumption. The adsorption regeneration tower can effectively purify nitric oxide gas, remove impurities, improve the purity of nitric oxide, and meet the needs of high-precision experiments. Since nitric oxide gas can be continuously generated by the online preparation device and stored in a gas tank, continuous use in the laboratory can be achieved without the need to frequently replace gas cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of an on-line laboratory preparation device for nitric oxide according to an embodiment of the present invention.

[0020] Figure 2 It is a structural schematic diagram of an adsorption regeneration tower according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 100. Laboratory online preparation device for nitric oxide; 1. Ionization chamber; 101. Air inlet; 102. Ionized gas outlet; 103. Heat exchange gas outlet; 104. Heat exchange gas inlet; 2. Positive electrode; 3. Negative electrode; 4. Adsorption regeneration tower; 401. Adsorbent inlet; 402. Adsorbent outlet; 403. Ionized gas inlet; 404. Exhaust port; 405. Nitric oxide outlet; 5. Compressor; 6. Gas storage tank; 7. Heating coil; 701. Heat medium inlet; 702. Heat medium outlet; 8. Cooling coil; 801. Cold medium inlet; 802. Cold medium outlet; 9. First induced draft fan; 10. First on-off valve; 11. Heat exchanger; 12. Second induced draft fan; 13. Second on-off valve; 14. Second on-off valve. DETAILED DESCRIPTION

[0023] The 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 are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figure 1 and Figure 2 As shown, the laboratory-based online nitric oxide production apparatus 100 according to an embodiment of the present invention includes an ionization chamber 1, an adsorption regeneration tower 4, a compressor 5, and a gas storage tank 6. The ionization chamber 1 has an air inlet 101 and an ionized gas outlet 102. A positive electrode 2 and a negative electrode 3 are provided on the ionization chamber 1. The positive electrode 2 and the negative electrode 3 cooperate to generate an arc to ionize the air in the ionization chamber 1 and produce nitric oxide gas.

[0025] Adsorption regeneration tower 4 has an adsorbent inlet 401, an adsorbent outlet 402, an ionized gas inlet 403, an exhaust port 404, and a nitric oxide outlet 405. The ionized gas inlet 403 communicates with the ionized gas outlet 102 to receive the ionized gas discharged from the ionization chamber 1. Nitric oxide in the ionized gas is adsorbed by the adsorbent within adsorption regeneration tower 4. Exhaust port 404 is used to remove the adsorbed ionized gas. The saturated adsorbent is heated and decomposed within adsorption regeneration tower 4 for regeneration. Nitric oxide outlet 405 is used to remove the decomposed and regenerated nitric oxide.

[0026] The air inlet of the compressor 5 is communicated with the nitric oxide outlet 405 , and the air outlet of the compressor 5 is communicated with the gas storage tank 6 , so that the nitric oxide gas discharged from the nitric oxide outlet 405 is compressed and stored in the gas storage tank 6 .

[0027] When the nitric oxide laboratory online preparation device 100 of the embodiment of the present invention is in use, air enters the ionization box 1 through the air inlet 101 of the ionization box 1, and the ionization box 1 is provided with a positive electrode 2 and a negative electrode 3. When a high voltage is applied between the electrodes, an arc is generated. The high-energy electrons in the arc collide with nitrogen and oxygen molecules in the air, causing them to ionize and generate nitric oxide gas. The ionized nitric oxide gas and the unreacted air mixture enter the adsorption regeneration tower 4. In the adsorption regeneration tower 4, the nitric oxide gas is adsorbed by the internal adsorbent, while other gas components are discharged through the exhaust port 404, thereby achieving the purification of nitric oxide. When the adsorbent is saturated with adsorption, the adsorbed nitric oxide gas is released by heating and decomposition, and the adsorbent is regenerated at the same time, and the adsorption process can continue. The nitric oxide gas after decomposition and regeneration is compressed by a compressor 5 and then stored in a gas storage tank 6 so that it can be used at any time in the laboratory.

[0028] The nitric oxide laboratory online preparation device 100 of the embodiment of the present invention is compared with traditional multi-stage reactors and gas purification devices, adopts ionization box 1 and adsorption regeneration tower 4, greatly simplifies the device structure, and is easy to operate and maintain. The mode of generating nitric oxide by electric arc avoids the high temperature and high pressure conditions in traditional methods, effectively reducing energy consumption. Adsorption regeneration tower 4 can effectively purify nitric oxide gas, remove impurities, improve the purity of nitric oxide, and meet the needs of high-precision experiments. Since nitric oxide gas can be continuously generated by the online preparation device and stored in gas tank 6, continuous use of the laboratory can be achieved without frequently changing gas cylinders.

[0029] In some embodiments, a heating coil 7 and a cooling coil 8 are provided in the adsorption regeneration tower 4. The heating coil 7 has a hot medium inlet 701 and a hot medium outlet 702. The heating coil 7 is used to heat the adsorption-saturated adsorbent so that the adsorption-saturated adsorbent can be decomposed and regenerated. The cooling coil 8 has a cold medium inlet 801 and a cold medium outlet 802. The cooling coil 8 is used to cool the decomposed and regenerated adsorbent so that the regenerated adsorbent can adsorb nitric oxide in the flue gas.

[0030] A heat medium (e.g., steam or hot water) is introduced into the heating coil 7 to heat the saturated adsorbent. The purpose of heating is to increase the porosity of the adsorbent, allowing the nitric oxide molecules adsorbed in the pores to separate from the adsorbent, thereby achieving desorption and regeneration of the adsorbent. The design of the heat medium inlet 701 and outlet allows the heat medium to circulate within the heating coil 7, maintaining a certain temperature gradient to ensure efficient and uniform heating of the adsorbent.

[0031] A cold medium (such as circulating water or cold air) is introduced into the cooling coil 8 to cool the adsorbent after it has undergone the heating and regeneration process. This cooling process lowers the adsorbent's temperature, enabling it to reabsorb nitric oxide from the flue gas. The design of the cold medium inlet 801 and outlet allows the cold medium to circulate within the cooling coil 8, maintaining the adsorbent's temperature within the optimal adsorption range.

[0032] The nitric oxide laboratory online preparation device 100 of the embodiment of the present invention can ensure that the adsorbent is kept in the best working state at different stages through the cyclic process of heating regeneration and cooling adsorption, thereby improving the adsorption efficiency. Reasonable temperature control can reduce the wear and thermal stress of the adsorbent and extend its service life. By accurately controlling the temperature during the adsorption and regeneration process, it can be ensured that the prepared nitric oxide standard gas has a high degree of purity and stability. The design of the heating coil 7 and the cooling coil 8 increases the flexibility of the system, and the temperature of the hot medium and the cold medium can be adjusted according to actual needs to adapt to different operating conditions and flue gas components.

[0033] In some embodiments, the heating coil 7 is disposed on the inner wall of the adsorption regeneration tower 4 and is spirally arranged along the height direction of the adsorption regeneration tower 4 .

[0034] The laboratory-based online nitric oxide preparation apparatus 100 of the embodiment of the present invention utilizes a spirally arranged heating coil 7 to achieve uniform heating along the height of the adsorption regeneration tower 4, ensuring that the adsorbent is evenly heated throughout the tower, thereby improving heating efficiency and adsorbent regeneration. The spirally structured heating coil 7 provides a larger contact area, enabling more efficient heat exchange between the heat medium and the adsorbent.

[0035] In some embodiments, the cooling coil 8 is disposed on the inner wall of the adsorption regeneration tower 4 and is spirally arranged along the height direction of the adsorption regeneration tower 4 .

[0036] The nitric oxide standard gas preparation system of the present embodiment is similar to the heating coil 7. The spiral arrangement of the cooling coil 8 ensures uniform cooling along the height of the adsorption regeneration tower 4, allowing the regenerated adsorbent to be evenly cooled throughout the tower to restore its adsorption capacity. The spiral arrangement of the cooling coil 8 provides a larger contact area, facilitating heat exchange between the adsorbent and the cooling medium, thereby improving cooling efficiency.

[0037] In some embodiments, the ionization box 1 further has a heat exchange gas outlet 103 and a heat exchange gas inlet 104. The heat exchange gas outlet 103 is connected to the heat medium inlet 701, and the heat exchange gas inlet 104 is connected to the heat medium outlet 702, so that part of the ionized gas discharged from the ionization box 1 is transported to the heating coil 7 as a heat medium.

[0038] As ionization chamber 1 generates nitric oxide, the temperature of the gas inside it rises. Some of the ionized gas is discharged through heat exchange gas outlet 103 and serves as a heat medium. The heat medium is transported to heating coil 7 via a pipe connecting heat exchange gas outlet 103 and heat medium inlet 701. In heating coil 7, the heat medium releases heat, which is used to heat the adsorbent in adsorption regeneration tower 4, promoting its regeneration. Simultaneously, the heat medium is used to maintain the temperature inside ionization chamber 1, ensuring the efficiency of nitric oxide generation. After releasing heat, the heat medium returns to ionization chamber 1 via a pipe connecting heat exchange gas inlet 104 and heat medium outlet 702, or is cooled and recycled.

[0039] The heat exchange system effectively recovers and utilizes the heat generated during the ionization process, reducing energy waste and improving overall system efficiency. Using a thermal medium to heat the adsorbent accelerates its regeneration, thereby increasing the continuous production of nitric oxide. The heat exchange system reduces the need for external heating sources and lowers laboratory operating costs.

[0040] In some embodiments, a first induced draft fan 9 and a first on-off valve 10 are provided between the heat exchange gas outlet 103 and the heat medium inlet 701 .

[0041] When the system starts, the first induced draft fan 9 begins operating, generating suction to draw the hot gas out of the ionization box 1. The hot gas flows through the heat exchange gas outlet 103 to the heat medium inlet 701. During this process, the hot gas exchanges heat with the heat medium, releasing heat, and the temperature of the heat medium increases. The first on-off valve 10 opens and closes according to system requirements to adjust the flow of the heat exchange gas and maintain the stability of the heat exchange process. The monitoring device in the system monitors the heat exchange process in real time. Once an abnormality is detected, the first on-off valve 10 will quickly close, cutting off the flow of the heat exchange gas to protect the safety of the system.

[0042] The coordinated operation of the induced draft fan and the on-off valve allows for more effective control of the heat exchange process, improving heat exchange efficiency. The first on-off valve 10 provides a fast-response safety measure for the system, enhancing its safety performance. This design allows operators to more flexibly control the heat exchange process, meeting diverse experimental requirements.

[0043] In some embodiments, the cooling medium delivered by the cold medium inlet 801 is room temperature air.

[0044] Using room temperature air as the cooling medium can simplify system design and operation because no additional coolant or complex cooling systems are required. Room temperature air is a free resource, and using it as a cooling medium can significantly reduce system operating costs.

[0045] In some embodiments, the laboratory online preparation device 100 of nitric oxide in an embodiment of the present invention further includes a heat exchanger 11, which is arranged between the ionized gas outlet 102 and the ionized gas inlet 403, and is used to heat and cool the ionized gas discharged from the ionization box 1 and then transport it to the adsorption regeneration tower 4.

[0046] The heat exchanger 11 can control the temperature of the gas entering the adsorption regeneration tower 4 by cooling the ionized gas, ensuring that the adsorbent operates at the optimal temperature, thereby improving the adsorption efficiency. During the ionization process, the gas temperature may rise to a level sufficient to damage the adsorbent or other equipment components. The heat exchanger 11 can prevent the ionized gas from overheating and protect the adsorbent and other parts of the system. By cooling, the water vapor content in the ionized gas can be reduced, because at higher temperatures, the ionized gas may contain more water vapor, which will affect the purity of nitric oxide. The heat exchanger 11 can also be used as a heat recovery device to transfer the heat energy in the ionized gas to a heat medium, which can be reused, for example, to preheat the adsorbent in the adsorption regeneration tower 4, thereby improving the energy efficiency of the system.

[0047] Controlling the gas temperature through heat exchanger 11 maintains stable operation of the entire system and extends the life of the adsorbent. The reduced water content of the cooled ionized gas improves the purity of nitric oxide. The design of heat exchanger 11 facilitates the recovery and utilization of thermal energy, reducing energy consumption and improving the energy efficiency of the laboratory-based online nitric oxide production device.

[0048] In some embodiments, a second induced draft fan 12 is provided between the heat exchanger 11 and the ionized gas inlet 403 .

[0049] The second induced draft fan 12 is located between the heat exchanger 11 and the ionized gas inlet 403. Its function is to effectively transport the ionized gas to the inlet of the ionization box 1 after it has been cooled by the heat exchanger 11. The second induced draft fan 12 helps guide the flow of the ionized gas by generating suction, ensuring that the direction and speed of the gas flow meet the requirements of the system design. Through the use of the second induced draft fan 12, the flow of gas can be more effectively controlled, and the operating efficiency of the entire nitric oxide preparation system can be improved. The second induced draft fan 12 helps to maintain the stability of the internal pressure of the system and reduces the impact of airflow fluctuations on the system. By adjusting the operating parameters of the second induced draft fan 12, the operating state of the system can be flexibly adjusted to adapt to different experimental requirements.

[0050] In some embodiments, a second on-off valve 13 is provided between the ionized gas outlet 102 and the heat exchanger 11 .

[0051] If a system anomaly (such as excessive temperature or abnormal pressure) is detected, the second on-off valve 13 quickly closes, cutting off the flow of heat exchange gas and preventing further damage. During system maintenance or overhaul, the second on-off valve 13 isolates the heat exchanger 11, facilitating access. In an emergency, the second on-off valve 13 quickly cuts off the flow of gas, enabling a rapid system shutdown to protect equipment and personnel.

[0052] In some embodiments, a third on-off valve is provided between the adsorption regeneration tower 4 and the compressor 5 .

[0053] The third on-off valve controls the path of nitric oxide gas from the adsorption regeneration tower 4 to the compressor 5. During normal operation, the valve is open, allowing the flow of nitric oxide gas. When it is necessary to stop the flow of gas, the valve can be quickly closed. By adjusting the opening of the third on-off valve, the pressure of the gas flowing to the compressor 5 can be controlled, ensuring that the compressor 5 operates at an appropriate pressure. In the event of an abnormality in the system, such as excessive pressure or abnormal temperature, the third on-off valve can be quickly closed, cutting off the flow of nitric oxide gas and preventing potential damage.

[0054] In the description of the present invention, it should 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0055] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] 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.

[0058] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0059] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A laboratory online preparation device for nitric oxide, characterized in that: include: An ionization box (1), the ionization box (1) having an air inlet (101) and an ionized gas outlet (102), the ionization box (1) being provided with a positive electrode (2) and a negative electrode (3), the positive electrode (2) and the negative electrode (3) cooperating to generate an arc to ionize the air in the ionization box (1) and generate nitric oxide gas; An adsorption regeneration tower (4), the adsorption regeneration tower (4) having an adsorbent inlet (401), an adsorbent outlet (402), an ionized gas inlet (403), an exhaust port (404) and a nitric oxide outlet (405), the ionized gas inlet (403) being in communication with the ionized gas outlet (102) to receive the ionized gas discharged from the ionization box (1), the nitric oxide gas in the ionized gas being adsorbed by the adsorbent in the adsorption regeneration tower (4), the exhaust port (404) being used to remove the adsorbed ionized gas, the adsorbent saturated with adsorption being heated and decomposed and regenerated in the adsorption regeneration tower (4), and the nitric oxide outlet (405) being used to remove the decomposed and regenerated nitric oxide gas; A compressor (5) and a gas storage tank (6), wherein the air inlet of the compressor (5) is connected to the nitric oxide outlet (405), and the air outlet of the compressor (5) is connected to the gas storage tank (6), so that the nitric oxide gas discharged from the nitric oxide outlet (405) is compressed and stored in the gas storage tank (6).

2. The nitric oxide laboratory online preparation device according to claim 1, characterized in that: The adsorption regeneration tower (4) is provided with a heating coil (7) and a cooling coil (8), wherein the heating coil (7) has a hot medium inlet (701) and a hot medium outlet (702), and the heating coil (7) is used to heat the adsorbent saturated with adsorption so as to decompose and regenerate the adsorbent saturated with adsorption, and the cooling coil (8) has a cold medium inlet (801) and a cold medium outlet (802), and the cooling coil (8) is used to cool the decomposed and regenerated adsorbent so as to allow the regenerated adsorbent to adsorb nitrogen monoxide in the flue gas.

3. The nitric oxide laboratory online preparation device according to claim 2, characterized in that: The heating coil (7) is arranged on the inner wall of the adsorption regeneration tower (4) and is spirally arranged along the height direction of the adsorption regeneration tower (4); And / or the cooling coil (8) is arranged on the inner wall of the adsorption regeneration tower (4) and is spirally arranged along the height direction of the adsorption regeneration tower (4).

4. The laboratory online preparation device for nitric oxide according to claim 2, characterized in that: The ionization box (1) also has a heat exchange gas outlet (103) and a heat exchange gas inlet (104); the heat exchange gas outlet (103) is in communication with the heat medium inlet (701), and the heat exchange gas inlet (104) is in communication with the heat medium outlet (702), so that part of the ionized gas discharged from the ionization box (1) is transported to the heating coil (7) as a heat medium.

5. The laboratory online preparation device for nitric oxide according to claim 4, characterized in that: A first induced draft fan (9) and a first on-off valve (10) are provided between the heat exchange gas outlet (103) and the heat medium inlet (701).

6. The laboratory online preparation device for nitric oxide according to claim 2, characterized in that: The cooling medium transported by the cold medium inlet (801) is room temperature air.

7. The laboratory online preparation device for nitric oxide according to claim 1, characterized in that: It also comprises a heat exchanger (11), which is arranged between the ionized gas outlet (102) and the ionized gas inlet (403) and is used for transferring the ionized gas discharged from the ionization box (1) to the adsorption regeneration tower (4) after heat exchange and temperature reduction.

8. The laboratory online preparation device for nitric oxide according to claim 7, characterized in that: A second induced draft fan (12) is provided between the heat exchanger (11) and the ionized gas inlet (403).

9. The laboratory online preparation device for nitric oxide according to claim 7, characterized in that: A second on-off valve (13) is provided between the ionized gas outlet (102) and the heat exchanger (11).

10. The laboratory online preparation device of nitric oxide according to claim 1, characterized in that: A third opening and closing valve is provided between the adsorption regeneration tower (4) and the compressor (5).

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