A modular nitrogen generator

Abstract

The invention discloses a modular nitrogen generator, which relates to the technical field of nitrogen generators. The modular nitrogen generator comprises a filter ventilation pipe and a nitrogen efficiency analysis system. An adsorption tower A is installed on the outer surface of a first air intake pipe, and an adsorption tower B is installed on the outer surface of a second air intake pipe. The modular nitrogen generator guides part of the filtered gas to the adsorption tower A through the first air intake pipe and the adsorption tower B through the second air intake pipe, so that the filtered gas can be continuously processed, and its load capacity is increased, thereby effectively sharing the workload of the adsorption tower A, ensuring that the adsorption tower A can still maintain efficient adsorption when the molecular sieve is about to reach saturation, thereby achieving the maximum efficiency of nitrogen production, ensuring continuous and stable efficient production, ensuring the final nitrogen quality is stable, and meeting user needs.

Description

Technical Field

[0001] The invention relates to the technical field of nitrogen generators, and in particular to a modular nitrogen generator. Background Art

[0002] Modular nitrogen generator is an advanced nitrogen production equipment. Its main feature is that the nitrogen production system is divided into multiple modules. The modular design allows for more flexible configuration, expansion and maintenance. The modular nitrogen generator consists of multiple independent functional modules, which can be flexibly combined and configured as needed. The multiple independent functional modules include adsorption tower A and adsorption tower B, which play an important role in the nitrogen production process. The adsorption tower uses pressure swing adsorption (PSA) technology to separate nitrogen and oxygen in the air. The air is compressed and passed through an adsorbent (such as a molecular sieve) to selectively adsorb oxygen and other impurities to extract nitrogen. In the PSA system, there are usually two adsorption towers (Tower A and Tower B) working alternately, one tower for nitrogen separation and extraction, and the other tower for regeneration or recovery.

[0003] The existing system is that adsorption tower A is used for nitrogen separation and extraction, and adsorption tower B is used for regeneration or recovery. However, the speed of regeneration or recovery is greater than the process of nitrogen separation and extraction. When the molecular sieve inside adsorption tower A is close to saturation, the efficiency of nitrogen production by adsorption tower A becomes lower, thereby reducing the overall nitrogen output efficiency of the modular nitrogen generator. The reduced efficiency of adsorption tower A may result in more oxygen and other impurities not being effectively removed during the separation process, affecting the purity of nitrogen and thus affecting the quality of the final product. When adsorption tower A is close to saturation, high pressure is required to maintain the nitrogen separation efficiency, which will make the system pressure unstable and affect the normal operation of the nitrogen generator.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to adjust the air intake volume of the first air intake pipe and the second air intake pipe, guide part of the filtered gas to the adsorption tower B, so that it can continue to process the filtered gas, increase its load capacity, effectively share the workload of the adsorption tower A, and ensure that it can still maintain efficient adsorption when the molecular sieve is about to reach saturation, thereby achieving the maximum efficiency of nitrogen production, ensuring continuous, stable and efficient production, ensuring the final nitrogen quality is stable, and meeting user needs.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a modular nitrogen generator, comprising a filter ventilation pipe and a nitrogen efficiency analysis system, a regulating box is installed on the outer surface of the filter ventilation pipe, a regulating chamber is opened inside the regulating box, a first air intake pipe is installed on one end surface of the regulating box, a second air intake pipe is installed on one end surface of the regulating box, an adsorption tower A is installed on the outer surface of the first air intake pipe, an adsorption tower B is installed on the outer surface of the second air intake pipe, a regeneration gas air intake pipe is installed on the outer surface of the adsorption tower A and the outer surface of the adsorption tower B, and a regeneration gas air intake pipe is installed on the outer surface of the adsorption tower A and the outer surface of the adsorption tower B. There is a pressure regulating pipeline, and two air inlet cavities are provided inside the regulating box. A first adsorption gas outlet pipeline is installed on the outer surface of the adsorption tower A, and a second adsorption gas outlet pipeline is installed on the outer surface of the adsorption tower B. An airflow precision regulating component is installed inside the regulating cavity, and two sealing cover plates are installed on the outer surface of the airflow precision regulating component. A movable groove is provided inside the regulating box, and the outer surfaces of the two sealing cover plates are in movable contact with the inner wall of the movable groove. A common delivery pipe is installed on the outer surface of the first adsorption gas outlet pipeline and the outer surface of the second adsorption gas outlet pipeline, and a nitrogen storage pipe is installed on one end surface of the common delivery pipe.

[0007] Furthermore, the airflow precision adjustment component includes a motor and a ball screw, the motor is installed on the inner wall of the adjustment chamber, the ball screw is installed on the outer surface of the motor output end, two screw sliders are movably installed on the outer surface of the ball screw, and the outer surfaces of the two screw sliders are both installed with limiting connecting blocks.

[0008] Furthermore, a limiting groove is provided inside the regulating box, and the inner wall of the limiting groove is in active contact with the outer surface of the limiting connecting block, and the outer surfaces of the two limiting connecting blocks are fixedly connected to one end surface of the sealing cover plate.

[0009] Furthermore, the two air inlet cavities are connected to each other corresponding to one end of the first air inlet pipe and one end of the second air inlet pipe, and one end surface of the two sealing cover plates is in active contact with the inner wall of the air inlet cavity.

[0010] Furthermore, a stabilizing slider is installed on the outer surface of one of the limit connecting blocks, a stabilizing sliding cavity is opened inside the adjusting box, the inner wall of the stabilizing sliding cavity is in movable contact with the outer surface of the stabilizing slider, and a gear bar is installed on the outer surface of one of the stabilizing sliders.

[0011] Furthermore, two rotating columns are movably installed inside the filter ventilation tube, and a windshield is commonly installed on one end surface of the two rotating columns. The outer surface of one of the rotating columns is a gear ring, and the outer surface of the gear ring is meshed with the outer surface of the gear bar.

[0012] Further, the nitrogen efficiency analysis system includes a model building unit, an efficiency analysis unit, a parameter output unit, a flow regulation analysis unit and a gas flow control unit;

[0013] The model building unit is used to obtain the working state data of the adsorption tower A and a plurality of groups of inlet flow data Qi of the first inlet pipeline and outlet flow data Qj of the first adsorption gas outlet pipeline, and analyze the dynamic relationship between the inlet flow data Qi and the outlet flow data Qj to establish a molecular sieve efficiency model;

[0014] The efficiency analysis unit is used to obtain intake data Q1 through a flow sensor 1 arranged on the inner wall of the first intake pipe, obtain real-time outlet data Q2 through a flow sensor 2 arranged on the inner wall of the first adsorbed gas outlet pipe, obtain standard outlet data Q3 based on the intake data Q1 combined with the molecular sieve efficiency model, calculate the error value △Q between the standard outlet data Q3 and the real-time outlet data Q2, and judge the molecular sieve efficiency according to a preset error threshold to generate a switching signal;

[0015] The parameter output unit is used to obtain the switching signal, substitute the error value △Q, that is, the outlet flow data Q5 of the second regeneration gas outlet pipeline into the molecular sieve efficiency model, obtain the inlet flow data Q4 of the second inlet pipeline, and send the flow data Q4 to the gas flow control unit;

[0016] The flow regulation analysis unit is used to obtain displacement data of the sealing cover plate, intake data Q1 at the first intake duct and intake data Q4 at the second intake duct, and spatial data of the intake cavity, and establish a dynamic regulation equation according to the spatial data and displacement data of the intake cavity and the intake data Q1 and the intake data Q4;

[0017] The gas flow control unit is used to obtain and process the intake flow data Q4, and after substituting the intake flow data Q4 into the vertical dynamic adjustment equation, the adjustment parameter of the sealing cover plate, that is, the displacement change value Xi of the sealing cover plate, is obtained. The motor is controlled to adjust the movement of the sealing cover plate according to the adjustment parameter, so that the real-time gas flow in the second intake pipe reaches the intake flow data Q4.

[0018] Furthermore, the specific method for establishing the molecular sieve efficiency model is as follows:

[0019] S101, obtaining working status data of adsorption tower A, wherein the working status data of adsorption tower A includes internal pressure coefficient P of adsorption tower A, internal temperature coefficient T of adsorption tower A, molecular sieve diameter and humidity of gas after filtration;

[0020] S102. Calculate the efficiency influence coefficient Ki of the adsorption tower A according to the following formula: , where e1, e2 and e3 are preset proportional coefficients, and e1>e2>e3;

[0021] S103, obtaining a plurality of groups of inlet flow data Qi of the first inlet pipe and outlet flow data Qj of the first adsorption gas outlet pipe, establishing a coordinate axis with the inlet flow data Qi as the horizontal coordinate and the outlet flow data Qj as the vertical coordinate, marking the plurality of groups of inlet flow data Qi and outlet flow data Qj on the coordinate axis one by one to obtain a gas efficiency related curve;

[0022] S104. Calculate the curve equation based on the gas efficiency correlation curve to obtain the molecular sieve efficiency model: f(Q): .

[0023] Furthermore, the specific process of establishing the dynamic adjustment equation is as follows:

[0024] S201, obtaining spatial data of the air intake cavity, wherein the spatial data includes displacement data X, length data L, width data W of the sealing cover plate, and total air intake data Qr of the filter ventilation pipe, i.e., the sum of the air intake data Q1 of the first air intake pipe and the air intake data Q4 at the inner wall of the second air intake pipe, and calculating the efficiency influence coefficient of the air intake cavity according to the following formula , e4 and e5 are preset proportional coefficients;

[0025] S202, obtaining a plurality of groups of air flow data Q1 of the first air intake duct and air flow data Q4 at the inner wall of the second air intake duct and displacement data Xi of the sealing cover plate, and establishing a coordinate axis with the gas flow unit Qh as the horizontal coordinate and the displacement data Xi of the sealing cover plate as the vertical coordinate;

[0026] S203, marking a plurality of groups of intake air flow data Q1 and the intake air data Q4 at the inner wall of the second intake air pipe one by one on the coordinate axis to obtain a gas efficiency related curve L1 and a gas efficiency related curve L4;

[0027] S204, performing curve equation analysis based on the gas efficiency related curve L1 and the gas efficiency related curve L4 to obtain a dynamic adjustment equation: , where d0 is a constant, a is the slope coefficient of the gas efficiency related curve L1, and b is the slope coefficient of the gas efficiency related curve L4.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. The modular nitrogen generator guides part of the filtered gas to the adsorption tower B by adjusting the air intake of the first air intake pipe and the second air intake pipe, so that it can continue to process the filtered gas, increase its load capacity, and effectively share the workload of the adsorption tower A, ensuring that it can still maintain efficient adsorption when the molecular sieve is about to reach saturation, thereby achieving the maximum efficiency of nitrogen production, ensuring continuous, stable and efficient production, and ensuring the final stable quality of nitrogen to meet user needs.

[0030] 2. The modular nitrogen generator precisely adjusts the flow direction of the filtered gas to ensure that the filtered gas is accurately blown to the target air inlet cavity to respond to different production needs and effectively distribute the filtered gas to adsorption tower A and adsorption tower B to ensure a continuous and efficient production process. The dynamic adjustment capability of the windshield enables the gas to be quickly and accurately switched between adsorption tower A and adsorption tower B, thereby optimizing the filtered gas distribution process and improving the overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The overall external structure schematic diagram of the modular nitrogen generator of the present invention is shown;

[0032] Figure 2 Another schematic diagram of the overall external structure of the modular nitrogen generator of the present invention is shown;

[0033] Figure 3 A schematic diagram of the internal structure of the regulating box of the present invention is shown;

[0034] Figure 4 A schematic diagram of the internal structure of the airflow precision adjustment component of the present invention is shown;

[0035] Figure 5 A schematic diagram showing the internal structure of the airflow precision adjustment assembly of the present invention from another viewing angle is shown;

[0036] Figure 6 The schematic diagram of the structure of the nitrogen efficiency analysis system of the present invention is shown;

[0037] Explanation of the accompanying drawings: 1. Adsorption tower A; 2. Adsorption tower B; 3. Filter ventilation pipe; 4. Nitrogen storage pipe; 5. Adjustment box; 6. First air inlet pipe; 7. First adsorption gas outlet pipe; 8. First regeneration gas outlet pipe; 9. Regeneration gas inlet pipe; 10. Pressure regulating pipe; 11. Second air inlet pipe; 12. Second regeneration gas outlet pipe; 13. Second adsorption gas outlet pipe; 14. Adjustment chamber; 15. Air inlet chamber; 16. Motor; 17. Ball screw; 18. Screw slider; 19. Limit connecting block; 20. Limit groove; 21. Moving groove; 22. Sealing cover plate; 23. Stabilizing slider; 24. Rotating column; 25. Wind shield; 26. Gear ring; 27. Gear bar; 28. Stabilizing slide cavity; 29. ​​Common conveying pipe. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] like Figure 1-5As shown, a modular nitrogen generator includes a filter ventilation pipe 3 and a nitrogen efficiency analysis system, a regulating box 5 is installed on the outer surface of the filter ventilation pipe 3, a regulating chamber 14 is opened inside the regulating box 5, a first air inlet pipe 6 is installed on one end surface of the regulating box 5, a second air inlet pipe 11 is installed on one end surface of the regulating box 5, an adsorption tower A1 is installed on the outer surface of the first air inlet pipe 6, an adsorption tower B2 is installed on the outer surface of the second air inlet pipe 11, a regeneration gas inlet pipe 9 is installed on the outer surface of the adsorption tower A1 and the outer surface of the adsorption tower B2, a pressure regulating pipe 10 is installed on the outer surface of the adsorption tower A1 and the outer surface of the adsorption tower B2, two air inlet chambers 15 are opened inside the regulating box 5, a first adsorption gas outlet pipe 7 is installed on the outer surface of the adsorption tower A1, a second adsorption gas outlet pipe 13 is installed on the outer surface of the adsorption tower B2, an airflow precision regulating component is installed inside the regulating chamber 14, two sealing cover plates 22 are installed on the outer surface of the airflow precision regulating component, and the inner surface of the regulating box 5 A movable groove 21 is opened in the part, and the outer surfaces of the two sealing cover plates 22 are in movable contact with the inner wall of the movable groove 21. The outer surfaces of the first adsorption gas outlet pipe 7 and the outer surfaces of the second adsorption gas outlet pipe 13 are jointly installed with a common delivery pipe 29, and a nitrogen storage pipe 4 is installed on one end surface of the common delivery pipe 29. When one of the sealing cover plates 22 blocks and closes the corresponding air inlet cavity 15, the other sealing cover plate 22 completely opens the corresponding air inlet cavity 15. At this time, the wind shield plate 25 blows the wind direction of the filtered gas to the direction of the other air inlet cavity 15, which is convenient for accurately adjusting the flow direction of the filtered gas and ensuring that the filtered gas is accurately blown to the target air inlet cavity 15. It is very important to respond to different production needs. Effectively allocating the filtered gas to the adsorption tower A1 and the adsorption tower B2 is the key to ensure continuous and efficient production. The dynamic adjustment ability of the wind shield plate 25 enables the gas to be quickly and accurately switched between the adsorption tower A1 and the adsorption tower B2, thereby optimizing the filtered gas distribution process and improving the overall production efficiency.

[0041] The airflow precision adjustment component includes a motor 16 and a ball screw 17. The motor 16 is installed on the inner wall of the adjustment chamber 14, and the ball screw 17 is installed on the outer surface of the output end of the motor 16. Two screw sliders 18 are movably installed on the outer surface of the ball screw 17. The outer surfaces of the two screw sliders 18 are both installed with limited connection blocks 19. The motor 16 drives the ball screw 17 to rotate, and the ball screw 17 and the screw slider 18 cooperate with each other.

[0042] A limiting groove 20 is provided inside the regulating box 5, and the inner wall of the limiting groove 20 is in active contact with the outer surface of the limiting connecting block 19. The outer surfaces of the two limiting connecting blocks 19 are fixedly connected to one end surface of the sealing cover plate 22 respectively. The screw slider 18 drives the limiting connecting block 19 to move stably in the limiting groove 20, so that the two screw sliders 18 drive the limiting connecting block 19 and the sealing cover plate 22 to move respectively.

[0043] The two air inlet cavities 15 are connected to one end of the first air inlet pipe 6 and one end of the second air inlet pipe 11, and one end surface of the two sealing cover plates 22 is in active contact with the inner wall of the air inlet cavity 15. A stable slider 23 is installed on the outer surface of one of the limit connection blocks 19. A stable sliding cavity 28 is opened inside the adjustment box 5. The inner wall of the stable sliding cavity 28 is in active contact with the outer surface of the stable slider 23. A gear bar 27 is installed on the outer surface of one of the stable sliders 23. Two rotary motion devices are installed inside the filter ventilation pipe 3. The rotating column 24, one end surface of the two rotating columns 24 is jointly installed with a windshield 25, the outer surface of one rotating column 24 is a gear ring 26, the outer surface of the gear ring 26 is meshed with the outer surface of the gear bar 27, and the motor 16 is operated to drive the two sealing cover plates 22 to adjust their positions in the moving groove 21 in a corresponding manner, thereby changing the air intake volume inside the two air intake chambers 15, so that the molecular sieve of the adsorption tower A1 can continue to operate at a near maximum efficiency when it is close to saturation, and by adjusting the windshield 25 The wind direction after filtration guides part of the filtered gas to the adsorption tower B2, so that it can continue to process the filtered gas, increase its load capacity, and effectively share the workload of the adsorption tower A1, ensuring that it can still maintain efficient adsorption when the molecular sieve is about to reach saturation. By optimizing the flow direction after filtration and adjusting the air intake, when the molecular sieve of the adsorption tower A1 is close to saturation, its remaining adsorption capacity can be fully utilized, thereby achieving the maximum efficiency of nitrogen production, reducing the decline in production efficiency caused by the saturation of the molecular sieve, ensuring continuous, stable and efficient production, and being able to flexibly adapt to different production needs and changes in conditions, thereby improving the overall production flexibility and adaptability. After the regeneration process of the adsorption tower B2 is completed, the gas can be smoothly flowed to the adsorption tower B2, reducing the downtime in the production process. The smooth transition can ensure the continuity of production and minimize the impact of production interruptions on the overall output. Moreover, through the precise control of the air intake and airflow direction, the gas treatment process can be better managed to ensure the final nitrogen quality is stable to meet user needs.

[0044] The working principle is as follows: when nitrogen needs to be prepared, the air is processed in sequence by the compressor, storage tank, cooler, degreasing and water remover, freeze dryer and tight filter, and then transported to the adjustment box 5 through the filter ventilation pipe 3. The motor 16 drives the ball screw 17 to rotate, and the ball screw 17 cooperates with the screw slider 18. The screw slider 18 drives the limit connection block 19 to move stably in the limit groove 20, so that the two screw sliders 18 correspondingly drive the limit connection blocks 19 and the sealing cover plate 22 to move. The two sealing cover plates 22 both move in the moving groove 21, and the sealing cover plate 22 blocks the air inlet cavity 15, and one of the limit connection blocks 19 drives the stable slider 23 to move in the stable sliding cavity 28, so that the stable slider 23 drives the gear bar 27 to move, and the outer surface of the gear bar 27 is meshed with the outer surface of the gear ring 26. The strip 27 drives the gear ring 26 to rotate, and the gear ring 26 drives one of the rotating columns 24 to rotate, so that the two rotating columns 24 stably drive the wind shield 25 to rotate. When one sealing cover plate 22 blocks and closes the corresponding air inlet cavity 15, the other sealing cover plate 22 completely opens the corresponding air inlet cavity 15. At this time, the wind shield 25 blows the wind direction of the filtered gas to the direction of the other air inlet cavity 15, which is convenient for accurately adjusting the flow direction of the filtered gas and ensuring that the filtered gas is accurately blown to the target air inlet cavity 15. In response to different production needs, the filtered gas is effectively distributed to the adsorption tower A1 and the adsorption tower B2 to ensure continuous and efficient production. The dynamic adjustment capability of the wind shield 25 enables the gas to be quickly and accurately switched between the adsorption tower A1 and the adsorption tower B2, thereby optimizing the filtered gas distribution process and improving the overall production efficiency.

[0045] After the regeneration process of the adsorption tower B2 is completed, the motor 16 is operated to drive the two sealing cover plates 22 to adjust their positions in the movable groove 21 in a corresponding manner, thereby changing the air intake volume inside the two air inlet chambers 15, and adjusting so that the molecular sieve of the adsorption tower A1 can continue to operate at a near maximum efficiency when it is close to saturation, and by adjusting the wind direction after filtration of the wind shield plate 25, part of the filtered gas is guided to the adsorption tower B2, so that it can continue to process the filtered gas, increase its load capacity, and effectively share the workload of the adsorption tower A1, ensuring that it can still maintain efficient adsorption when the molecular sieve is about to reach saturation, and by optimizing the flow direction after filtration and adjusting the air intake volume, the molecular sieve of the adsorption tower A1 can continue to operate at a near maximum efficiency. When the sieve is close to saturation, its remaining adsorption capacity is fully utilized to achieve the maximum efficiency of nitrogen production, reduce the decline in production efficiency caused by the saturation of the molecular sieve, ensure continuous, stable and efficient production, and be able to flexibly adapt to different production needs and changes in conditions, thereby improving the overall production flexibility and adaptability. After the regeneration process of the adsorption tower B2 is completed, the gas can flow smoothly to the adsorption tower B2, reducing the downtime in the production process. The smooth transition can ensure the continuity of production and minimize the impact of production interruptions on the overall output. The precise control of the air intake volume and airflow direction can better manage the gas treatment process, ensuring the final nitrogen quality is stable and meeting user needs.

[0046] Embodiment 2:

[0047] like Figure 6 As shown, a modular nitrogen generator includes a filter ventilation pipe 3 and a nitrogen efficiency analysis system, and the nitrogen efficiency analysis system includes a model building unit, an efficiency analysis unit, a parameter output unit, a flow regulation analysis unit and a gas flow control unit;

[0048] The model building unit is used to obtain the working state data of the adsorption tower A1 and several groups of inlet flow data Qi of the first inlet pipeline 6 and outlet flow data Qj of the first adsorption gas outlet pipeline 7, and analyze the dynamic relationship between the inlet flow data Qi and the outlet flow data Qj to establish a molecular sieve efficiency model;

[0049] The working state data of adsorption tower A1 and adsorption tower B2 are the same, and are applicable to the same molecular sieve efficiency model;

[0050] The efficiency analysis unit is used to obtain the intake data Q1 through the flow sensor 1 arranged on the inner wall of the first intake pipe 6, obtain the real-time outlet data Q2 through the flow sensor 2 arranged on the inner wall of the first adsorbed gas outlet pipe 7, obtain the standard outlet data Q3 according to the intake data Q1 combined with the molecular sieve efficiency model, calculate the error value △Q between the standard outlet data Q3 and the real-time outlet data Q2, and judge the molecular sieve efficiency according to the preset error threshold to generate a switching signal;

[0051] The parameter output unit is used to obtain the switching signal, substitute the error value △Q, that is, the outlet flow data Q5 of the second regeneration gas outlet pipeline 12 into the molecular sieve efficiency model, obtain the inlet flow data Q4 of the second inlet pipeline 11, and send the flow data Q4 to the gas flow control unit;

[0052] The flow regulation analysis unit is used to obtain the displacement data of the sealing cover plate 22, the intake data Q1 at the first intake duct 6 and the intake data Q4 at the second intake duct 11, and the spatial data of the intake cavity 15, and establish a dynamic regulation equation according to the spatial data and displacement data of the intake cavity 15 and the intake data Q1 and the intake data Q4;

[0053] The gas flow control unit is used to obtain and process the intake flow data Q4. After substituting the intake flow data Q4 into the vertical dynamic adjustment equation, the adjustment parameter of the sealing cover plate 22, that is, the displacement change value Xi of the sealing cover plate 22, is obtained. According to the adjustment parameter, the motor 16 is controlled to adjust the movement of the sealing cover plate 22 so that the real-time gas flow in the second intake pipe 11 reaches the intake flow data Q4.

[0054] The specific method for establishing the molecular sieve efficiency model is as follows:

[0055] S101, obtaining the working status data of the adsorption tower A1, the working status data of the adsorption tower A1 including the internal pressure coefficient P of the adsorption tower A1, the internal temperature coefficient T of the adsorption tower A1, the molecular sieve diameter and the humidity of the gas after filtration;

[0056] S102. Calculate the efficiency influence coefficient Ki of the adsorption tower A according to the following formula: , where e1, e2 and e3 are preset proportional coefficients, and e1>e2>e3;

[0057] S103, obtaining a plurality of groups of intake flow data Qi of the first intake pipe 6 and an outlet flow data Qj of the first adsorbed gas outlet pipe 7, establishing a coordinate axis with the intake flow data Qi as the abscissa and the outlet flow data Qj as the ordinate, marking the plurality of groups of intake flow data Qi and outlet flow data Qj on the coordinate axis one by one to obtain a gas efficiency related curve;

[0058] S104. Calculate the curve equation based on the gas efficiency correlation curve to obtain the molecular sieve efficiency model: f(Q): .

[0059] The specific process of establishing the dynamic adjustment equation is as follows:

[0060] S201, obtain the spatial data of the air intake cavity 15, the spatial data includes the displacement data X, length data L, width data W of the sealing cover plate 22, the total air intake data Qr of the filter ventilation pipe 3, that is, the sum of the air intake data Q1 of the first air intake pipe 6 and the air intake data Q4 at the inner wall of the second air intake pipe 11, and calculate the efficiency influence coefficient of the air intake cavity 15 according to the following formula , e4 and e5 are preset proportional coefficients;

[0061] S202, obtaining a plurality of groups of intake air flow data Q1 of the first intake pipe 6 and intake air data Q4 at the inner wall of the second intake pipe 11 and displacement data Xi of the sealing cover plate 22, and establishing a coordinate axis with the gas flow unit Qh as the horizontal coordinate and the displacement data Xi of the sealing cover plate 22 as the vertical coordinate;

[0062] S203, marking a plurality of groups of intake air flow data Q1 and the intake air data Q4 at the inner wall of the second intake air pipe 11 one by one on the coordinate axis to obtain a gas efficiency related curve L1 and a gas efficiency related curve L4;

[0063] S204, performing curve equation analysis based on the gas efficiency related curve L1 and the gas efficiency related curve L4 to obtain a dynamic adjustment equation: , where d0 is a constant, a is the slope coefficient of the gas efficiency related curve L1, and b is the slope coefficient of the gas efficiency related curve L4.

[0064] The present invention obtains standard outlet data Q3 according to the air intake data Q1 in combination with the molecular sieve efficiency model, calculates the error value △Q between the standard outlet data Q3 and the real-time outlet data Q2, judges the molecular sieve efficiency according to a preset error threshold to generate a switching signal, and then substitutes the error value △Q, that is, the outlet flow data Q5 of the second regeneration gas outlet pipeline 12 into the molecular sieve efficiency model to obtain the air intake flow data Q4 of the second air intake pipeline 11, and then substitutes the air intake flow data Q4 into the vertical dynamic adjustment equation to obtain the adjustment parameters of the sealing cover plate 22, and controls the motor 16 to adjust the movement of the sealing cover plate 22 according to the adjustment parameters, so that the real-time gas flow in the second air intake pipeline 11 reaches the air intake flow data Q4, so that the nitrogen production efficiency is stable and the nitrogen production efficiency is maximized, meeting user needs.

[0065] The threshold is set to facilitate comparison. The size of the threshold depends on the amount of sample data and the number of bases set by technicians in this field for each group of sample data; as long as it does not affect the proportional relationship between the parameter and the quantized value.

[0066] The above formulas are all dimensionless and numerical calculations. The formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0067] In the two embodiments provided in the present application, it should be understood that the disclosed devices and systems can be implemented in other ways; for example, the device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed; another point, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, the indirect coupling or communication connection of devices or modules can be electrical, mechanical or other forms;

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A modular nitrogen generator, comprising a filter ventilation pipe (3) and a nitrogen efficiency analysis system, wherein a regulating box (5) is installed on the outer surface of the filter ventilation pipe (3), a regulating chamber (14) is provided inside the regulating box (5), a first air intake pipe (6) is installed on one end surface of the regulating box (5), a second air intake pipe (11) is installed on one end surface of the regulating box (5), an adsorption tower A (1) is installed on the outer surface of the first air intake pipe (6), an adsorption tower B (2) is installed on the outer surface of the second air intake pipe (11), a regeneration gas intake pipe (9) is installed on the outer surface of the adsorption tower A (1) and the outer surface of the adsorption tower B (2), and a pressure regulating pipe (10) is installed on the outer surface of the adsorption tower A (1) and the outer surface of the adsorption tower B (2), wherein: The regulating box (5) has two air inlet chambers (15) formed therein, a first adsorption gas outlet pipe (7) is mounted on the outer surface of the adsorption tower A (1), a second adsorption gas outlet pipe (13) is mounted on the outer surface of the adsorption tower B (2), an airflow precision regulating assembly is mounted therein, two sealing cover plates (22) are mounted on the outer surface of the airflow precision regulating assembly, a movable groove (21) is formed therein, the outer surfaces of the two sealing cover plates (22) are in movable contact with the inner wall of the movable groove (21), a common delivery pipe (29) is mounted on the outer surface of the first adsorption gas outlet pipe (7) and the outer surface of the second adsorption gas outlet pipe (13), a nitrogen storage pipe (4) is mounted on one end surface of the common delivery pipe (29), and the airflow precision regulating assembly comprises a motor (16) and a ball screw (17), the motor (16) being mounted in the regulating chamber ( 14), the ball screw (17) is mounted on the outer surface of the output end of the motor (16), the outer surface of the ball screw (17) is movably mounted with two screw sliders (18), the outer surfaces of the two screw sliders (18) are both mounted with a limit connection block (19), a limit groove (20) is provided inside the regulating box (5), the inner wall of the limit groove (20) is in movable contact with the outer surface of the limit connection block (19), the outer surfaces of the two limit connection blocks (19) are fixedly connected to one end surface of a sealing cover plate (22) correspondingly, the two air intake cavities (15) are in communication with one end of the first air intake pipe (6) and one end of the second air intake pipe (11), one end surface of the two sealing cover plates (22) is in movable contact with the inner wall of the air intake cavity (15), and the nitrogen efficiency analysis system comprises a model establishment unit, an efficiency analysis unit, a parameter output unit, a flow regulation analysis unit and a gas flow control unit; The model building unit is used to obtain the working state data of the adsorption tower A (1) and a plurality of groups of inlet flow data Qi of the first inlet pipeline (6) and outlet flow data Qj of the first adsorption gas outlet pipeline (7), and analyze the dynamic relationship between the inlet flow data Qi and the outlet flow data Qj to establish a molecular sieve efficiency model; The efficiency analysis unit is used to obtain intake data Q1 through a flow sensor 1 arranged on the inner wall of the first intake pipe (6), obtain real-time outlet data Q2 through a flow sensor 2 arranged on the inner wall of the first adsorbed gas outlet pipe (7), obtain standard outlet data Q3 based on the intake data Q1 in combination with a molecular sieve efficiency model, calculate an error value △Q between the standard outlet data Q3 and the real-time outlet data Q2, and judge the molecular sieve efficiency based on a preset error threshold to generate a switching signal; The parameter output unit is used to obtain the switching signal, substitute the error value ΔQ, i.e., the outlet gas flow data Q5 of the second regeneration gas outlet pipeline (12) into the molecular sieve efficiency model, obtain the inlet gas flow data Q4 of the second inlet pipeline (11), and send the flow data Q4 to the gas flow control unit; The flow rate regulation analysis unit is used to obtain displacement data of the sealing cover plate (22), intake data Q1 at the first intake duct (6), intake data Q4 at the second intake duct (11), and spatial data of the intake cavity (15), and to establish a dynamic regulation equation based on the spatial data and displacement data of the intake cavity (15) and the intake data Q1 and the intake data Q4; The gas flow control unit is used to obtain and process intake flow data Q4, substitute the intake flow data Q4 into a vertical dynamic adjustment equation to obtain an adjustment parameter of the sealing cover plate (22), i.e., a displacement change value Xi of the sealing cover plate (22), and control the motor (16) to adjust the movement of the sealing cover plate (22) according to the adjustment parameter, so that the real-time gas flow in the second intake duct (11) reaches the intake flow data Q4.

2. A modular nitrogen generator according to claim 1, characterized in that: A stabilizing slider (23) is installed on the outer surface of one of the limit connecting blocks (19), a stabilizing slider cavity (28) is provided inside the regulating box (5), an inner wall of the stabilizing slider cavity (28) is in movable contact with the outer surface of the stabilizing slider (23), and a gear bar (27) is installed on the outer surface of one of the stabilizing sliders (23).

3. A modular nitrogen generator according to claim 1, characterized in that: Two rotating columns (24) are movably installed inside the filter ventilation pipe (3), and a windshield (25) is installed on one end surface of the two rotating columns (24). A gear ring (26) is installed on the outer surface of one of the rotating columns (24), and the outer surface of the gear ring (26) is meshed with the outer surface of the gear bar (27).

4. A modular nitrogen generator according to claim 1, characterized in that: The specific method for establishing the molecular sieve efficiency model is as follows: S101, obtaining working status data of the adsorption tower A (1), wherein the working status data of the adsorption tower A (1) includes an internal pressure coefficient P of the adsorption tower A (1), an internal temperature coefficient T of the adsorption tower A (1), a molecular sieve diameter, and humidity of the gas after filtration; S102. Calculate the efficiency influence coefficient Ki of the adsorption tower A according to the following formula: , where e1, e2 and e3 are preset proportional coefficients, and e1>e2>e3; S103, obtaining a plurality of groups of inlet flow data Qi of the first inlet pipeline (6) and outlet flow data Qj of the first adsorbed gas outlet pipeline (7), establishing a coordinate axis with the inlet flow data Qi as the horizontal coordinate and the outlet flow data Qj as the vertical coordinate, marking the plurality of groups of inlet flow data Qi and outlet flow data Qj one by one on the coordinate axis to obtain a gas efficiency related curve; S104. Calculate the curve equation based on the gas efficiency correlation curve to obtain the molecular sieve efficiency model: f(Q): .

5. A modular nitrogen generator according to claim 1, characterized in that: The specific process of establishing the dynamic adjustment equation is as follows: S201, obtaining spatial data of the air intake cavity (15), wherein the spatial data includes displacement data X, length data L, width data W of the sealing cover plate (22), and total air intake data Qr of the filter ventilation pipe (3), i.e., the sum of air intake data Q1 of the first air intake duct (6) and air intake data Q4 at the inner wall of the second air intake duct (11), and calculating the efficiency influence coefficient of the air intake cavity (15) according to the following formula: , e4 and e5 are preset proportional coefficients; S202, obtaining a plurality of groups of air flow data Q1 of the first air intake duct (6), air flow data Q4 at the inner wall of the second air intake duct (11), and displacement data Xi of the sealing cover plate (22), and establishing a coordinate axis with the gas flow unit Qh as the horizontal coordinate and the displacement data Xi of the sealing cover plate (22) as the vertical coordinate; S203, marking a plurality of groups of intake air flow data Q1 and intake air data Q4 at the inner wall of the second intake air pipe (11) one by one on the coordinate axis to obtain a gas efficiency related curve L1 and a gas efficiency related curve L4; S204, performing curve equation analysis based on the gas efficiency related curve L1 and the gas efficiency related curve L4 to obtain a dynamic adjustment equation: , where d0 is a constant, a is the slope coefficient of the gas efficiency related curve L1, and b is the slope coefficient of the gas efficiency related curve L4.

Images