A combustion device based on nitrogen-oxygen separation

Abstract

This application belongs to the field of combustion equipment technology, and particularly relates to a combustion device based on nitrogen-oxygen separation. The device includes a combustion unit with at least two oxygen inlet pipes on its outer side. These pipes are connected to a gas supply pipe, and a nitrogen-oxygen separation device is installed on the gas supply pipe. This application utilizes the heat from the exhaust gas discharged from the combustion unit to heat the thermally conductive spacer within the nitrogen-oxygen separation device. Air is then introduced into the thermally conductive inner tube of the nitrogen-oxygen separation device, causing the 5A zeolite molecular sieve within the inner tube to separate oxygen and nitrogen from the air at high temperature. The separated oxygen enters an oxygen storage pipe, allowing high-purity oxygen to be continuously delivered to the combustion unit through the oxygen storage pipe. This significantly reduces the formation of nitrogen oxides within the combustion unit and lowers the cost of oxygen usage.

Description

Technical Field

[0001] This application belongs to the field of combustion equipment technology, and in particular relates to a combustion device based on nitrogen-oxygen separation. Background Technology

[0002] Currently, combustion devices use air to aid combustion, but nitrogen in the air will form gases such as nitric oxide and nitrogen dioxide during combustion. These gases still need to be treated as waste gas. In addition, although it is feasible to directly add oxygen by purchasing industrial oxygen, the cost is high. For manufacturers using combustion equipment, the profit margin is already low, so using a high-cost solution is not realistic. Summary of the Invention

[0003] In order to solve the above problems, this application provides a combustion device based on nitrogen-oxygen separation.

[0004] The primary objective of this application is to provide a combustion device based on nitrogen-oxygen separation. This application utilizes the heat from the exhaust gas discharged from the combustion equipment to heat the thermally conductive spacer within the nitrogen-oxygen separation device, and introduces air into the thermally conductive inner tube of the nitrogen-oxygen separation device. This allows the 5A zeolite molecular sieve within the thermally conductive inner tube to separate oxygen and nitrogen from the air at high temperatures. The separated oxygen enters the oxygen storage pipe, thereby continuously supplying high-purity oxygen to the combustion equipment through the oxygen storage pipe. This significantly reduces the generation of nitrogen oxides within the combustion equipment and lowers the cost of oxygen usage.

[0005] To achieve the primary objective of this application, the technical solution of this application is as follows:

[0006] A combustion device based on nitrogen-oxygen separation includes a combustion device, at least two oxygen inlet pipes are provided on the outside of the combustion device, the oxygen inlet pipes are connected to a gas supply pipeline, a nitrogen-oxygen separation device is provided on the gas supply pipeline, the gas supply pipeline includes a first pipeline and a second pipeline, the second pipeline is connected to an intake fan or a booster valve, the first pipeline is connected to the oxygen inlet pipe, a valve is provided between the first pipeline and the second pipeline, a first connection port is provided on the first pipeline, a second connection port is provided on the second pipeline, a nitrogen-oxygen separation device is provided between the first connection port and the second connection port, and multiple booster valves are arranged in parallel, the outlet of the booster valve is connected to the second pipeline through a pipeline.

[0007] Furthermore, the nitrogen-oxygen separation device includes a dehumidification pipe with an insulated outer pipe. A heat-conducting inner pipe is located on the inner circumference of the insulated outer pipe. A heat-conducting gap exists between the heat-conducting inner pipe and the insulated outer pipe. A heat-conducting plate is installed on the heat-conducting gap and connected to the heat-conducting inner pipe. 5A zeolite molecular sieve is installed inside the heat-conducting inner pipe. The dehumidification pipe is internally connected to the insulated outer pipe, the heat-conducting gap, and the heat-conducting inner pipe. An outer pipe is installed outside the dehumidification pipe, and the space between the outer pipe and the dehumidification pipe is connected to the heat-conducting gap. A heating outer pipe is installed on the combustion equipment, with a heating inner pipe inside. A heating gap exists between the heating outer pipe and the heating inner pipe. A heat-conducting pipe is installed on the heating outer pipe and connected to the heat-conducting gap.

[0008] Furthermore, a first outer tube is provided on the first connection port, and a first inner tube is provided inside the first outer tube. A first temperature-conducting cavity is provided between the first outer tube and the first inner tube. A high-temperature gas outlet pipe is provided on the first outer tube, and the high-temperature gas outlet pipe is connected to the first temperature-conducting cavity. The first temperature-conducting cavity is connected to the temperature-conducting interval. A second outer tube is provided on the second connection port, and a second inner tube is provided inside the second outer tube. A second temperature-conducting cavity is provided between the second outer tube and the second inner tube. A high-temperature gas inlet pipe is provided on the second outer tube, and the high-temperature gas inlet pipe is connected to the inlet of the temperature-conducting tube. The high-temperature gas outlet pipe is connected to the outlet of the temperature-conducting tube. A first gas detection port is provided on the first connection port, and a second gas detection port is provided on the second connection port. A first temperature detection port is provided on the first outer tube, and a first temperature sensor is provided on the first temperature detection port. A second temperature detection port is provided on the second outer tube, and a second temperature sensor is provided on the second temperature detection port.

[0009] Furthermore, the nitrogen-oxygen separation device is equipped with a vent pipe, which is connected to a nitrogen storage tank.

[0010] Furthermore, a first fixing plate is provided at one end of the heat-conducting inner tube, and a second fixing plate is provided at the other end of the heat-conducting inner tube. An air outlet is provided on the first fixing plate, and an air inlet is provided on the second fixing plate. A threaded heat exchange plate is provided between the first fixing plate and the second fixing plate. The threaded heat exchange plate is fixedly connected to the heat-conducting inner tube. An insulated outer tube is provided on the outer periphery of the first fixing plate and the second fixing plate. The insulated outer tube is fixedly connected to the first fixing plate, the second fixing plate, and the threaded heat exchange plate. The spiral heat exchange plate is spiral in shape.

[0011] Furthermore, there is a first gap between the threaded heat exchange plate and the first fixed plate, and a second gap between the threaded heat exchange plate and the second fixed plate. The temperature guide plate is fixedly mounted on the first fixed plate and is located on both sides of the air outlet.

[0012] Furthermore, the high-temperature air inlet pipe is fixedly connected to the air intake fan or booster valve via a pipeline, and the high-temperature air outlet pipe is equipped with a pipeline and an air outlet valve.

[0013] Furthermore, an oxygen storage tank is installed on the first pipeline, and an oxygen inlet pipe is installed on the oxygen storage tank. The oxygen inlet pipe is connected to the first pipeline. Multiple oxygen outlet pipes are installed at the upper end of the oxygen storage tank, and the oxygen outlet pipes are connected to the oxygen inlet pipes. A gas inlet pipe is installed on the combustion equipment, and the gas inlet pipe is connected to the combustion equipment through multiple inlets.

[0014] The second objective of this application is to provide a method for supplying oxygen to a combustion device, which utilizes the heat inside the combustion device to heat the thermally conductive gap inside the nitrogen-oxygen separation device, and introduces air into the thermally conductive inner tube of the nitrogen-oxygen separation device, so that the 5A zeolite molecular sieve inside the thermally conductive inner tube separates oxygen and nitrogen in the air at high temperature, and then supplies the separated oxygen to the combustion device for combustion support.

[0015] To achieve the second objective of this application, the technical solution of this application is as follows:

[0016] A method for supplying oxygen to a combustion device, employing the aforementioned nitrogen-oxygen separation-based combustion device, includes the following steps:

[0017] S1. Start the combustion equipment and deliver the oxygen stored in the oxygen storage tank or industrial oxygen into the combustion equipment to make the gas inside the combustion equipment burn.

[0018] S2. Open the inner heating pipe and the outer heating pipe so that the heat in the combustion equipment passes through the inner heating pipe and the airflow in the heating interval is heated. The heated airflow in the heating interval is introduced into the first high-temperature air inlet pipe so that the heated airflow passes through the heat conduction interval and flows out from the high-temperature air outlet pipe. The heated airflow flowing out from the high-temperature air outlet pipe is introduced into the heating interval between the inner heating pipe and the outer heating pipe.

[0019] S3. Close the valves on the first and second pipes, open the first air intake fan or booster valve, so that the air intake fan introduces air into the second pipe, and the air passes through the second inner pipe, dehumidification pipe, heat conduction inner pipe, first inner pipe, and first pipe into the oxygen storage tank. When using industrial oxygen, stop supplying industrial oxygen, open the valve between the oxygen storage tank and the combustion equipment, so that the oxygen in the oxygen storage tank enters the combustion equipment from the oxygen inlet pipe.

[0020] S4. After the set time, start the second high-temperature air inlet pipe and introduce the heated airflow in the heating interval into the second high-temperature air inlet pipe, so that the heated airflow passes through the heat conduction interval and flows out from the high-temperature air outlet pipe. The heated airflow flowing out from the high-temperature air outlet pipe is introduced into the heating interval between the heating inner pipe and the heating outer pipe. Close the valves on the first pipe and the second pipe, and open the second air intake fan or booster valve, so that the air intake fan introduces air into the second pipe, so that the air passes through the second inner pipe, the dehumidification pipe, the heat conduction inner pipe, the first inner pipe, and the first pipe into the oxygen storage tank. When industrial oxygen is used, stop the supply of industrial oxygen, open the valve between the oxygen storage tank and the combustion equipment, so that the oxygen in the oxygen storage tank enters the combustion equipment from the oxygen inlet pipe.

[0021] Furthermore, in step S4, when the second high-temperature air inlet pipe is used, the first air inlet fan or booster valve is turned on to introduce airflow into the high-temperature air inlet pipe, so that the airflow enters from the high-temperature air inlet pipe, passes through the thermal conductivity interval, and flows out from the high-temperature air outlet pipe. The airflow flowing out from the high-temperature air outlet pipe is discharged into the air, and the vent pipe is opened to allow nitrogen to enter the nitrogen storage tank.

[0022] Compared with the prior art, the beneficial effects of this application are as follows:

[0023] 1. This application utilizes a combustion device as a combustion space, and transports the waste heat from the combustion device to the space between the outer and inner heating pipes. This heats the air in the heating interval between the outer and inner heating pipes. The heated air is then transported to the heating interval through the first temperature-conducting cavity, and then back to the heating interval through the second temperature-conducting cavity. The heated nitrogen-oxygen separation device achieves higher oxygen and nitrogen separation efficiency and greater nitrogen absorption. Consequently, the separated oxygen enters the oxygen storage tank, ensuring a sufficient oxygen supply to the combustion device. High-purity oxygen is continuously transported to the combustion device through the oxygen storage pipe, greatly reducing the formation of nitrogen oxides within the combustion device and lowering the cost of oxygen usage.

[0024] 2. This application includes at least two nitrogen-oxygen separation devices. After one nitrogen-oxygen separation device has been used for a fixed period of time, the other nitrogen-oxygen separation device is activated, thereby enabling the nitrogen-oxygen separation device to continuously separate oxygen and deliver it to the oxygen storage tank. After storage and buffering in the oxygen storage tank, oxygen with stable pressure is continuously delivered to the combustion equipment.

[0025] 3. The nitrogen-oxygen separation device of this application relies on 5A zeolite molecular sieve. At temperatures exceeding 500 degrees Celsius, the nitrogen absorption capacity of 5A zeolite molecular sieve increases exponentially. The heat-conducting inner tube consists of a first fixed plate, a second fixed plate, and spiral heat exchange plates. When heated air enters from the air inlet on the second fixed plate, the heated air moves along the spiral heat exchange plates, increasing the heat exchange area. Since the air used is between the heating inner tube and the heating outer tube, there are no impurities generated in the combustion equipment. The heated air can stably heat the nitrogen-oxygen separation device when passing through it. This application utilizes the structure of the inner and outer tubes to heat the air that generates oxygen, making full use of the waste heat of the combustion equipment, thereby improving the combustion efficiency of the combustion equipment and reducing the operating cost of the combustion equipment. In addition, the temperature-conducting interval is also connected to the external air. The temperature of the temperature-conducting interval is adjusted by the external air, thereby controlling the absorption of nitrogen and oxygen. This allows the device to also produce nitrogen as a byproduct, thereby reducing the operating cost of the entire equipment by selling the nitrogen. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0027] Figure 1 This is a schematic diagram of the structure of the gas supply pipeline and the gas storage tank in this application;

[0028] Figure 2 for Figure 1 A top view structural diagram;

[0029] Figure 3 This is a schematic diagram of the overall structure of the nitrogen-oxygen separation device of this application;

[0030] Figure 4 This is a schematic diagram of the overall structure of the combustion device body of this application;

[0031] Figure 5 This is a schematic diagram of the internal structure of the nitrogen-oxygen separation device of this application;

[0032] Figure 6 This is a schematic diagram of the structure of the airflow passing through the nitrogen-oxygen separation device.

[0033] In the picture:

[0034] 1. Oxygen storage tank; 2. Oxygen outlet pipe; 3. Oxygen inlet pipe; 4. First pipe; 5. Second pipe; 6. Pneumatic valve; 7. First gas detection port; 8. First connection port; 9. First outer pipe; 10. First inner pipe; 11. High-temperature outlet pipe; 12. First temperature detection port; 13. Second gas detection port; 14. Second connection port; 15. Second outer pipe; 16. Second inner pipe; 17. High-temperature inlet pipe; 18. Second temperature... 19. Temperature detection port; 20. Insulated outer tube; 21. Heat-conducting inner tube; 22. Temperature-conducting plate; 23. 5A zeolite molecular sieve; 24. Connecting plate; 25. Vent hole; 26. Exhaust pipe; 27. Dehumidification pipe; 28. Combustion equipment; 29. ​​Gas inlet pipe; 30. Oxygen inlet pipe; 31. Heating outer tube; 32. Heating inner tube; 33. First fixing plate; 34. Gas outlet; 35. Second fixing plate; 36. Gas inlet; 37. Threaded heat exchange plate. Detailed Implementation

[0035] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] In this application, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this application and do not specifically refer to any part or element in this application. They should not be construed as limiting this application.

[0038] Example 1

[0039] A combustion device based on nitrogen-oxygen separation includes a combustion unit 27, which can also be a common kiln or boiler. At least two oxygen inlet pipes 29 are installed on the outside of the combustion unit 27. The two oxygen inlet pipes 29 can be arranged symmetrically or side-by-side. A symmetrical arrangement allows for convenient management of the two nitrogen-oxygen separation units, while a side-by-side arrangement saves space. These two implementations can be rationally arranged according to the size of the plant. The oxygen inlet pipes 29 are connected to a gas supply pipeline, on which the nitrogen-oxygen separation unit is installed. Specifically, the gas supply pipeline includes a first pipeline 4 and a second pipeline 5. The second pipeline 5 is connected to an air intake fan or a pressure booster valve, which circulates the air entering the second pipeline 5. Pressurized air is injected to allow air to pass smoothly through the nitrogen-oxygen separation device. More specifically, the first pipe 4 is connected to the oxygen inlet pipe 29. A valve, a pneumatic valve 6, is installed between the first pipe 4 and the second pipe 5. A first connection port 8 is installed on the first pipe 4, and a second connection port 14 is installed on the second pipe 5. The nitrogen-oxygen separation device is fixedly installed between the first connection port 8 and the second connection port 14 by bolts. Multiple pressurization valves are arranged in parallel. The outlet of the pressurization valve is connected to the second pipe 5 through a pipe. The air is pressurized by multiple pressurization valves arranged in parallel to ensure that the air can pass smoothly through the nitrogen-oxygen separation device.

[0040] Specifically, the nitrogen-oxygen separation device includes a dehumidification pipe 26, which removes moisture from the air entering the 5A zeolite molecular sieve 22. An insulating outer pipe 19 is fixedly installed on the dehumidification pipe 26. In this embodiment, an outer pipe is installed outside the dehumidification pipe 26, and the outer pipe is fixedly connected to the insulating outer pipe 19. A thermally conductive gap connects the outer pipe and the dehumidification pipe 26. A thermally conductive inner pipe 20 is located on the inner circumference of the insulating outer pipe 19. A thermally conductive gap exists between the thermally conductive inner pipe 20 and the insulating outer pipe 19. A thermally conductive plate 21 is installed on the thermally conductive gap and connected to the thermally conductive inner pipe 20. The 5A zeolite molecular sieve 22 is disposed inside the thermally conductive inner pipe 20, and the thermally conductive plate 21 is used to transfer heat. The temperature of the 5A zeolite molecular sieve 22 is raised to about 500-600 degrees Celsius inside the heat-conducting inner tube 20. The dehumidification tube 26 is connected to the heat-insulating outer tube 19, the heat-conducting interval and the heat-conducting inner tube 20. The combustion device 27 is equipped with a heating outer tube 30, and a heating inner tube 31 is installed inside the heating outer tube 30. The heating inner tube 31 is connected to the combustion device 27. There is a heat-conducting interval between the heating outer tube 30 and the heating inner tube 31. A heat-conducting pipe is installed on the heating outer tube 30 and is connected to the heat-conducting interval, so that the heating gas in the heat-conducting interval can enter the heat-conducting interval. In addition, the nitrogen-oxygen separation device is equipped with a vent pipe 25, which is connected to a nitrogen storage tank.

[0041] As a more specific implementation, a first outer tube 9 is installed on the first connecting port 8, and a first inner tube 10 is installed inside the first outer tube 9. A first temperature-conducting cavity is formed between the first outer tube 9 and the first inner tube 10. A high-temperature exhaust pipe 11 is installed on the first outer tube 9, and the high-temperature exhaust pipe 11 connects to the first temperature-conducting cavity. The first temperature-conducting cavity connects to the temperature-conducting interval. A second outer tube 15 is installed on the second connecting port 14, and a second inner tube 16 is installed inside the second outer tube 15. A second temperature-conducting cavity is formed between the second outer tube 15 and the second inner tube 16. A high-temperature intake pipe 17 is installed on the second outer tube 15, and the high-temperature intake pipe 17 connects to the second temperature-conducting cavity. 7 connects to the inlet of the heat-conducting pipe, and the high-temperature exhaust pipe 11 connects to the outlet of the heat-conducting pipe. In this embodiment, the heat from the combustion device 27 is transferred to the space between the outer heating pipe 30 and the inner heating pipe 31, so that the air in the heating interval between the outer heating pipe 30 and the inner heating pipe 31 is heated. The heated air is transported to the heating interval along the first heat-conducting cavity, and then transported back to the heating interval through the second heat-conducting cavity. In addition, the high-temperature air inlet pipe 17 is fixedly connected to the air intake fan or the booster valve through the pipe. The high-temperature exhaust pipe 11 is equipped with a pipe and an exhaust valve is installed on the pipe to facilitate the air entering and exiting the heating interval. In this embodiment, valves and check valves need to be installed on the pipes at various points.

[0042] In this embodiment, the specific internal structure of the nitrogen-oxygen separation device is as follows: a first fixing plate 32 is installed at one end of the heat-conducting inner tube 20, and a second fixing plate 34 is installed at the other end of the heat-conducting inner tube 20. An air outlet 33 is provided on the first fixing plate 32, and an air inlet 35 is provided on the second fixing plate 34. A threaded heat exchange plate 36 is located between the first fixing plate 32 and the second fixing plate 34. The threaded heat exchange plate 36 is spiral-shaped and fixedly connected to the heat-conducting inner tube 20. An insulated outer tube 19 is installed on the outer periphery of the first fixing plate 32 and the second fixing plate 34, and is fixedly connected to the first fixing plate 32, the second fixing plate 34, and the threaded heat exchange plate 36. There is a first gap between the threaded heat exchange plate 36 and the first fixed plate 32, and a second gap between the threaded heat exchange plate 36 and the second fixed plate 34. The temperature guiding plate 21 is fixedly installed on the first fixed plate 32 and is located on both sides of the air outlet 33. When the heated air enters from the air inlet 35 on the second fixed plate 34, the heated air will first enter the second gap, and then the heated air will move evenly along the spiral heat exchange plate to increase the heat exchange area. Then it will enter the first gap and flow out from the air outlet 33. This structure has a smooth flow and a gap for buffering, which is very beneficial for the stable temperature control of the nitrogen-oxygen separation device.

[0043] In addition, an oxygen storage tank 1 is installed on the first pipeline 4. The oxygen storage tank 1 is used as a storage and buffer container. An oxygen inlet pipe 3 is installed on the oxygen storage tank 1. The oxygen inlet pipe 3 is connected to the first pipeline 4. Multiple oxygen outlet pipes 2 are installed at the upper end of the oxygen storage tank 1. The oxygen outlet pipes 2 are connected to the oxygen inlet pipe 29. A gas inlet pipe 28 is installed on the combustion device 27. The gas inlet pipe 28 is connected to the combustion device 27 through multiple inlets.

[0044] Flanges are used for pipe connections, while connecting plates 23 are used for connections with inner pipes. However, connecting plates 23 are fixedly connected to both inner and outer pipes. Vent holes 24 are opened on connecting plates 23 to connect various cavities, allowing airflow to pass smoothly.

[0045] This embodiment uses sensors to collect data from various locations as the main sensor installation locations. In this embodiment, a first gas detection port 7 is installed on the first connection port 8, a second gas detection port 13 is installed on the second connection port 14, and a gas detection sensor is installed on the gas detection port. A first temperature detection port 12 is opened on the first outer tube 9, and a first temperature sensor is installed on the first temperature detection port 12. A second temperature detection port 18 is opened on the second outer tube 15, and a second temperature sensor is installed on the second temperature detection port 18.

[0046] In addition, the oxygen inlet pipe 29 is connected to the combustion equipment through multiple branch pipes, so that the oxygen inlet pipe 29 can deliver oxygen evenly to various positions of the combustion equipment.

[0047] Example 2

[0048] This embodiment provides a method for supplying oxygen to a combustion device. The heat within the combustion device 27 is used to heat the thermally conductive gap within the nitrogen-oxygen separation device. Air is introduced into the thermally conductive inner tube 20 of the nitrogen-oxygen separation device, causing the 5A zeolite molecular sieve 22 within the thermally conductive inner tube 20 to separate oxygen and nitrogen from the air at high temperature. The separated oxygen is then supplied to the combustion device 27 for combustion support. This method utilizes a nitrogen-oxygen separation-based combustion device disclosed in Embodiment 1, and includes the following steps:

[0049] S1. Start the combustion device 27 and deliver the oxygen or industrial oxygen stored in the oxygen storage tank 1 into the combustion device 27, so that the gas in the combustion device 27 is burned.

[0050] S2. Open the inner heating pipe 31 and the outer heating pipe 30, so that the heat in the combustion device 27 passes through the inner heating pipe 31, the airflow in the heating interval is heated, and the heated airflow in the heating interval is introduced into the first high temperature air inlet pipe 17, so that the heated airflow passes through the heat conduction interval and flows out from the high temperature air outlet pipe 11. The heated airflow flowing out from the high temperature air outlet pipe 11 is introduced into the heating interval between the inner heating pipe 31 and the outer heating pipe 30.

[0051] S3. Close the valves on the first pipe 4 and the second pipe 5, and open the first air intake fan or booster valve so that the air intake fan introduces air into the second pipe 5, and the air enters the oxygen storage tank 1 through the second inner pipe 16, the dehumidification pipe 26, the heat conduction inner pipe 20, the first inner pipe 10, and the first pipe 4. When industrial oxygen is used, stop the supply of industrial oxygen and open the valve between the oxygen storage tank 1 and the combustion device 27 so that the oxygen in the oxygen storage tank 1 enters the combustion device 27 from the oxygen inlet pipe 29.

[0052] S4. After a set time, start the second high-temperature air inlet pipe 17 and introduce the heated airflow in the heating interval into the second high-temperature air inlet pipe 17, so that the heated airflow passes through the heat conduction interval and flows out from the high-temperature air outlet pipe 11. The heated airflow flowing out from the high-temperature air outlet pipe 11 is introduced into the heating interval between the heating inner pipe 31 and the heating outer pipe 30. Close the valves on the first pipe 4 and the second pipe 5, and open the second air intake fan or booster valve, so that the air intake fan introduces air into the second pipe 5, so that the air passes through the second inner pipe 16, the dehumidification pipe 26, the heat conduction inner pipe 20, the first inner pipe 10, and the first pipe 4 into the oxygen storage tank 1. When industrial oxygen is used, stop the supply of industrial oxygen, open the valve between the oxygen storage tank 1 and the combustion device 27, so that the oxygen in the oxygen storage tank 1 enters the combustion device 27 from the oxygen inlet pipe 29.

[0053] Additionally, in step S4, when the second high-temperature air inlet pipe 17 is used, the first air inlet fan or booster valve is turned on to introduce airflow into the high-temperature air inlet pipe 17, so that the airflow enters from the high-temperature air inlet pipe 17, passes through the thermal conductivity interval, and flows out from the high-temperature air outlet pipe 11. The airflow flowing out from the high-temperature air outlet pipe 11 is discharged into the air, and the vent pipe 25 is opened to allow nitrogen to enter the nitrogen storage tank.

[0054] More specifically, in this embodiment, a first temperature sensor and a second temperature sensor are used to detect the temperature of the heating gas flow and the temperature of the air entering the temperature conduction interval, thereby determining the heat exchange, heating, and cooling status of the nitrogen-oxygen separation device. A gas detection sensor is used to detect the composition and concentration of the output gas, thereby determining the separation status of the nitrogen-oxygen separation device.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0056] While the specific embodiments of this application have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this application. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this application are still within the scope of protection of this application.

Claims

1. A combustion device based on nitrogen-oxygen separation, characterized in that, It includes a combustion device (27), and at least two oxygen inlet pipes (29) are provided on the outside of the combustion device (27). The oxygen inlet pipes (29) are connected to the gas supply pipe, and a nitrogen-oxygen separation device is provided on the gas supply pipe. The gas supply pipeline includes a first pipeline (4) and a second pipeline (5). The second pipeline (5) is connected to a booster valve, and the first pipeline (4) is connected to an oxygen inlet pipe (29). A valve is provided between the first pipeline (4) and the second pipeline (5). A first connection port (8) is provided on the first pipeline (4), and a second connection port (14) is provided on the second pipeline (5). A nitrogen-oxygen separation device is provided between the first connection port (8) and the second connection port (14). The pressure boosting valves are arranged in a parallel manner, and the outlet of the pressure boosting valve is connected to the second pipeline (5) through a pipeline. The nitrogen-oxygen separation device includes a dehumidification pipe (26), an insulated outer pipe (19) is provided on the dehumidification pipe (26), a heat-conducting inner pipe (20) is provided on the inner circumference of the insulated outer pipe (19), a heat-conducting gap is provided between the heat-conducting inner pipe (20) and the insulated outer pipe (19), a heat-conducting plate (21) is provided on the heat-conducting gap, the heat-conducting plate (21) is connected to the heat-conducting inner pipe (20), and a 5A zeolite molecular sieve (22) is provided inside the heat-conducting inner pipe (20). The dehumidification pipe (26) is internally connected to the heat-insulating outer pipe (19), the heat-conducting gap, and the heat-conducting inner pipe (20). An outer pipe is provided outside the dehumidification pipe (26), and the outer pipe is connected to the heat-insulating outer pipe (19). The space between the outer pipe and the dehumidification pipe (26) is connected to the thermally conductive space. The combustion device (27) is provided with a heating outer pipe (30), and a heating inner pipe (31) is provided inside the heating outer pipe (30). There is a heating interval between the heating outer pipe (30) and the heating inner pipe (31). A temperature-conducting pipe is provided on the heating outer pipe (30), and the temperature-conducting pipe is connected to the temperature-conducting interval. The heat-conducting inner tube (20) has a threaded heat exchange plate (36) fixed inside. An oxygen storage tank (1) is provided on the first pipeline (4), and the upper end of the oxygen storage tank (1) is connected to an oxygen inlet pipe (29). The first connection port (8) is provided with a first outer tube (9), and the first outer tube (9) is provided with a first inner tube (10). There is a first temperature-conducting cavity between the first outer tube (9) and the first inner tube (10). A high-temperature gas outlet pipe (11) is provided on the first outer tube (9). The high-temperature gas outlet pipe (11) is connected to the first temperature-conducting cavity. The first temperature-conducting cavity is connected to the temperature-conducting interval. The second connection port (14) is provided with a second outer tube (15). The second outer tube (15) is provided with a second inner tube (16). There is a second temperature-conducting cavity between the second outer tube (15) and the second inner tube (16). A high-temperature gas inlet pipe (17) is provided on the second outer tube (15). The high-temperature gas inlet pipe (17) is connected to the second temperature-conducting cavity. The high-temperature gas inlet pipe (17) is connected to the inlet of the temperature-conducting tube. The high-temperature gas outlet pipe (11) is connected to the outlet of the temperature-conducting tube. The first connection port (8) is provided with a first gas detection port (7), the second connection port (14) is provided with a second gas detection port (13), the first outer tube (9) is provided with a first temperature detection port (12), the first temperature detection port (12) is provided with a first temperature sensor, the second outer tube (15) is provided with a second temperature detection port (18), and the second temperature detection port (18) is provided with a second temperature sensor.

2. The combustion device based on nitrogen-oxygen separation as described in claim 1, characterized in that, The nitrogen-oxygen separation device is equipped with a vent pipe (25), which is connected to a nitrogen storage tank.

3. The combustion device based on nitrogen-oxygen separation as described in claim 1, characterized in that, The heat-conducting inner tube (20) is provided with a first fixing plate (32) at one end and a second fixing plate (34) at the other end. The first fixing plate (32) is provided with an air outlet (33) and the second fixing plate (34) is provided with an air inlet (35). A threaded heat exchange plate (36) is provided between the first fixing plate (32) and the second fixing plate (34). The heat-insulating outer tube (19) is provided on the outer periphery of the first fixing plate (32) and the second fixing plate (34). The heat-insulating outer tube (19) is fixedly connected to the first fixing plate (32), the second fixing plate (34), and the threaded heat exchange plate (36). The threaded heat exchange plate is spiral-shaped.

4. A combustion device based on nitrogen-oxygen separation as described in claim 3, characterized in that, The threaded heat exchange plate (36) has a first gap with the first fixed plate (32), and the threaded heat exchange plate (36) has a second gap with the second fixed plate (34); The temperature guide plate (21) is fixedly mounted on the first fixed plate (32), and the temperature guide plate (21) is located on both sides of the air outlet (33).

5. A combustion device based on nitrogen-oxygen separation as described in claim 4, characterized in that, The high-temperature air inlet pipe (17) is fixedly connected to the pressure booster valve through a pipe, and a pipe is provided on the high-temperature air outlet pipe (11), and an air outlet valve is provided on the pipe.

6. A combustion device based on nitrogen-oxygen separation as described in claim 5, characterized in that, An oxygen inlet pipe (3) is provided on the oxygen storage tank (1), and the oxygen inlet pipe (3) is connected to the first pipe (4); The oxygen storage tank (1) is provided with multiple oxygen outlet pipes (2) at the upper end, and the oxygen outlet pipes (2) are connected to the oxygen inlet pipe (29). The combustion device (27) is provided with a gas inlet pipe (28), which is connected to the combustion device (27) through multiple inlets.

7. A method for supplying oxygen to a combustion device, characterized in that, The combustion device based on nitrogen-oxygen separation as described in claim 6 includes the following steps: S1. Start the combustion equipment (27) and deliver the oxygen or industrial oxygen stored in the oxygen storage tank (1) into the combustion equipment (27) so that the gas in the combustion equipment (27) is burned; S2. Open the inner heating pipe (31) and the outer heating pipe (30) so that the heat in the combustion device (27) passes through the inner heating pipe (31), the airflow in the heating interval is heated, and the heated airflow in the heating interval is introduced into the first high temperature inlet pipe (17), so that the heated airflow passes through the temperature conduction interval and flows out from the high temperature outlet pipe (11), and the heated airflow flowing out from the high temperature outlet pipe (11) is introduced into the heating interval between the inner heating pipe (31) and the outer heating pipe (30); S3. Close the valves on the first pipe (4) and the second pipe (5), open the pressure valve, and introduce air into the second pipe (5). The air passes through the second inner pipe (16), the dehumidification pipe (26), the heat-conducting inner pipe (20), the first inner pipe (10), and the first pipe (4) into the oxygen storage tank (1). When industrial oxygen is used, stop supplying industrial oxygen and open the valve between the oxygen storage tank (1) and the combustion equipment (27) so that the oxygen in the oxygen storage tank (1) enters the combustion equipment (27) from the oxygen inlet pipe (29). S4. After a set time, start the second high-temperature air inlet pipe (17) and introduce the heating airflow in the heating interval into the second high-temperature air inlet pipe (17), so that the heating airflow passes through the heat conduction interval and flows out from the high-temperature air outlet pipe (11). The heating airflow flowing out from the high-temperature air outlet pipe (11) is introduced into the heating interval between the heating inner pipe (31) and the heating outer pipe (30). Close the valves on the first pipe (4) and the second pipe (5), open the pressure valve, and introduce air into the second pipe (5), so that the air passes through the second inner pipe (16), the dehumidification pipe (26), the heat conduction inner pipe (20), the first inner pipe (10), and the first pipe (4) into the oxygen storage tank (1). When industrial oxygen is used, stop supplying industrial oxygen, open the valve between the oxygen storage tank (1) and the combustion equipment (27), so that the oxygen in the oxygen storage tank (1) enters the combustion equipment (27) from the oxygen inlet pipe (29).

8. A method for supplying oxygen to a combustion device as described in claim 7, characterized in that, In step S4, when the second high-temperature air inlet pipe (17) is used, the pressure valve is opened to introduce the airflow into the high-temperature air inlet pipe (17), so that the airflow enters from the high-temperature air inlet pipe (17), passes through the thermal conductivity interval, and flows out from the high-temperature air outlet pipe (11). The airflow flowing out from the high-temperature air outlet pipe (11) is discharged into the air. Open the vent pipe (25) to allow nitrogen to enter the nitrogen storage tank.

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