Nitrogen generator with dust filtering function

Abstract

The utility model relates to the technical field of gas separation and purification, concretely to a nitrogen making machine with filter dust function, including base, nitrogen making tower and filter box, the filter box is installed to the left side of base upside, the filter box outside front side is installed with the air inlet, the filter box inside front side is installed with the coarse filter screen, the filter box inside rear side is installed with the fine filter screen, the coarse filter screen and fine filter screen middle position are installed with the oil mist removal layer, the filter box inboard bottom is installed with the bottom integrated groove. The utility model discloses through install the bottom integrated groove, can realize the automation and accurate control function of impurity discharge, need not manual intervention to clean the residue of filter system produced regularly or as needed, guarantee the stability of filter efficiency, improve the security and maintenance convenience of equipment operation, make nitrogen making machine always maintain efficient dust filtering capacity in long -term operation.

Description

Technical Field

[0001] This utility model relates to the field of gas separation and purification technology, specifically a nitrogen generator with dust filtration function. Background Technology

[0002] In industrial production, nitrogen, as an inert gas, is widely used in industries such as chemical, food, and electronics. Traditional nitrogen generators may contain impurities such as dust in the intake air. If these impurities enter core components of the nitrogen generator, such as adsorption towers and membrane modules, they can cause equipment blockage, adsorbent poisoning, and decreased membrane performance, thereby shortening equipment lifespan and reducing nitrogen purity and yield. To solve this problem, it is necessary to integrate dust filtration into the nitrogen generator system. By using pre-filters or built-in filters to remove dust from the intake air, the stable operation of the nitrogen generator can be ensured. Therefore, the design of nitrogen generators with dust filtration functions is based on the actual needs of industry for high-purity nitrogen and the need to extend the service life of nitrogen generators and improve operational stability.

[0003] Existing nitrogen generators with dust filtration functions cannot effectively remove impurities and oil, leading to contamination of the molecular sieve in subsequent nitrogen generation components. Traditional external slag discharge pipes also cause problems such as separation of the filtration device from the slag discharge system and complex and leak-prone pipeline connections. Utility Model Content

[0004] The purpose of this invention is to provide a nitrogen generator with dust filtration function, in order to solve the problems mentioned in the background art, such as the inability to effectively remove impurities, the difficulty in effectively removing oil, and the easy leakage caused by the separation of the filtration device and the slag discharge system.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen generator with dust filtration function, comprising a base, a nitrogen generator tower, and a filter box. The filter box is installed on the upper left side of the base, a control unit is installed on the outer right side of the filter box, a nitrogen generator tower is installed on the outer right side of the control unit, a gas storage tank is installed on the outer right side of the nitrogen generator tower, an air inlet is installed on the front side of the filter box, a coarse filter screen is installed on the front side of the filter box, a fine filter screen is installed on the rear side of the filter box, an oil mist removal layer is installed between the coarse and fine filter screens, and a bottom integrated groove is installed at the bottom of the filter box.

[0006] Preferably, a horizontally placed filter screen is installed at the top of the bottom integrated tank, a fan is embedded in the rear side of the bottom integrated tank, an automatic slag discharge valve is embedded in the left side of the bottom integrated tank, a pressure sensor is embedded in the left side of the bottom of the bottom integrated tank, the pressure sensor is connected to the central processing unit through a wire, and the automatic slag discharge valve is connected to the control power supply through a wire.

[0007] Preferably, the filter box has a slag discharge port at the bottom and a slag discharge door at the top. An electromagnetic push rod is installed on the right side of the slag discharge door. The electromagnetic push rod is connected to the automatic slag discharge valve and the PLC controller through a wire. A pipe is installed on the upper left side of the filter box. The filter box is connected to the nitrogen generator tower through the pipe. The nitrogen generator tower is connected to the gas storage tank through the pipe.

[0008] Preferably, the controller is connected to the filter box via a pipe, and a regulating valve is installed at the pipe connection. The controller is also connected to the nitrogen generator via a pipe, and the nitrogen generator is connected to the gas storage tank via a pipe. A regulating valve is installed at the pipe connection between the top of the nitrogen generator and the gas storage tank, and the regulating valve is connected to the central processing unit via a wire.

[0009] Preferably, a PLC controller is installed at the bottom inside the control unit, the front of the PLC controller is connected to the rear of the refrigerant, an evaporator is installed at the front of the refrigerant, a fine filter membrane is installed at the upper inside of the control unit, and a fan is installed at the rear outside the control unit.

[0010] Preferably, a central processing unit is installed in the middle of the inner side of the PLC controller, a control power supply is installed on the left side of the inner side of the PLC controller, a temperature sensor is installed on the upper side of the inner side of the PLC controller, the control power supply and the temperature sensor are connected to the central processing unit through wires, the control power supply is connected to an external power source through wires, the PLC controller is connected to a pressure sensor, an electromagnetic push rod and a nitrogen concentration sensor through wires, a water receiving tray is installed at the bottom of the inner side of the controller, and a drain pipe is embedded in the connection between the controller and the water receiving tray.

[0011] Preferably, an exhaust valve is installed on the upper side of the nitrogen generator, and a bolt is embedded in the top of the outer side of the nitrogen generator. Gas distribution plates are installed on both the upper and lower sides of the inside of the nitrogen generator. Molecular sieves are filled between the gas distribution plates on both sides. A support plate is installed on the lower side of the lower gas distribution plate, and a pressure plate is installed on the lower side of the upper gas distribution plate. A spring is installed between the pressure plate and the gas distribution plate. A guide rod is vertically embedded inside the pressure plate and is connected to a bolt. A nitrogen concentration sensor is installed on the inner wall of the left side of the nitrogen generator and is connected to the central processing unit through a wire.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by installing a bottom integrated groove, enables the rapid discharge of impurities such as dust and oil mist residue intercepted by the filter box, realizing the automation and precise control of impurity discharge. The automatic slag discharge valve can clean the residue generated by the filtration system on a timed or as-needed basis without manual intervention, ensuring the stability of filtration efficiency. At the same time, through the linkage between the automatic slag discharge valve and the slag discharge door, it effectively prevents gas backflow during slag discharge, ensuring stable filtration efficiency, continuous air intake purification and safe equipment operation, so that the filter box can maintain a high-efficiency dust filtration capacity for a long time. 2. This utility model applies continuous and adjustable axial pressure to the molecular sieve layer inside the nitrogen generator tower by installing a pressure plate, guide rod, and spring. This ensures that the molecular sieve particles are in close contact and maintain a dense filling state under different operating conditions such as adsorption and regeneration. This provides a stable bed structure for uniform gas penetration and full adsorption, avoids loosening caused by initial filling gaps or long-term operation, ensures uniform gas flow penetration into the molecular sieve layer, improves adsorption efficiency, and ensures that nitrogen separation efficiency does not decrease with operating time. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front structural diagram of the present invention; Figure 3 This is a cross-sectional view of the filter box of this utility model; Figure 4 This is a cross-sectional view of the control unit of this utility model; Figure 5 This is a cross-sectional view of the nitrogen generation tower of this utility model.

[0014] In the diagram: 1. Base; 2. Nitrogen generator; 3. Filter box; 4. Control unit; 5. Pipeline; 6. Regulating valve; 7. Slag discharge door; 8. Air inlet; 9. Coarse filter screen; 10. Fine filter screen; 11. Bottom integrated tank; 12. Slag discharge port; 13. Automatic slag discharge valve; 14. Refrigerant; 15. Evaporator; 16. PLC controller; 17. Filter screen; 18. Molecular sieve; 19. Gas distribution plate; 20. Support plate; 21. Pressure sensor; 22. Wire; 23. Central processing unit; 24. Control power supply; 25. Temperature sensor; 26. Oil mist removal layer; 27. Nitrogen concentration sensor; 28. Bolt; 29. ​​Fan; 30. Electromagnetic push rod; 31. Water receiving tray; 32. Drain pipe; 33. Pressure plate; 34. Fine filter membrane; 35. Gas storage tank; 36. Exhaust valve; 37. Spring; 38. Guide rod. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] Example 1: Please refer to Figure 1 , Figure 2 and Figure 3 A nitrogen generator with dust filtration function includes a base 1, a nitrogen generator tower 2, and a filter box 3. The filter box 3 is installed on the upper left side of the base 1. A control unit 4 is installed on the outer right side of the filter box 3. The nitrogen generator tower 2 is installed on the outer right side of the control unit 4. A gas storage tank 35 is installed on the outer right side of the nitrogen generator tower 2. An air inlet 8 is installed on the front side of the filter box 3. A coarse filter screen 9 is installed on the front side of the filter box 3. A fine filter screen 10 is installed on the rear side of the filter box 3. An oil mist removal layer 26 is installed between the coarse filter screen 9 and the fine filter screen 10. A bottom integrated groove 11 is installed on the bottom of the filter box 3. Furthermore, the coarse filter 9 primarily intercepts large dust particles in the air, while the oil mist removal layer 26, filled with oleophilic glass fiber cotton, can adsorb over 90% of the oil mist and water vapor in the gas, preventing subsequent molecular sieve 18 from being contaminated by oil. The fine filter 10 captures fine particles, ensuring that the gas cleanliness meets the nitrogen pretreatment requirements. The horizontally placed filter 17 installed at the top of the bottom integrated tank 11 is a high-density metal mesh with a 2μm pore size, which can intercept fine impurities that sink with the airflow, preventing secondary mixing of clean gas. External dust-laden gas enters the filter box 3 through the air inlet 8, first flowing through the coarse filter 9, where large dust particles such as sand and fibers are intercepted and fall to the bottom integrated tank 11 under gravity. The gas after preliminary filtration enters the oil mist removal layer 26, where the oil mist and water vapor are adsorbed by the glass fiber cotton, forming an oil film or water droplets, which drip to the bottom integrated tank 11 under gravity. The de-oiled and dehydrated gas continues to flow through the fine filter 10, where fine particles such as PM2.5 are filtered. The TFE membrane intercepts the air, ultimately forming clean gas. Dust and oil residues produced during filtration gradually accumulate in the bottom integrated tank 11. The top filter 17 further intercepts fine impurities disturbed by the airflow, ensuring that all impurities are collected at the bottom of the tank. When the pressure sensor 21 in the bottom integrated tank 11 detects that the pressure generated by the accumulation of impurities reaches the preset threshold of 2.5~3.5 kPa, the signal is transmitted to the central processing unit 23 of the controller 4 through the wire 22. The central processing unit 23 instructs the automatic slag discharge valve 13 to open and drives the electromagnetic push rod 30 to open the slag discharge port 12 through the wire 22. The impurities are discharged to the outside under the action of gravity and residual gas pressure. When the pressure drops to the reset threshold of 0.3~0.8 kPa, the automatic slag discharge valve 13 and the slag discharge door 7 close, completing one automatic cleaning cycle without manual intervention. The filtered clean gas is transported to the controller 4 through the pipeline 5. The regulating valve 6 on the pipeline 5 adjusts the air intake according to the needs of the nitrogen generator 2.

[0019] Example 2: Please refer to Figure 2 and Figure 3 A nitrogen generator with dust filtration function, wherein a horizontally placed filter screen 17 is installed on the top of the bottom integrated tank 11, a fan 29 is embedded on the rear side of the outside of the bottom integrated tank 11, an automatic slag discharge valve 13 is embedded on the left side inside the bottom integrated tank 11, a pressure sensor 21 is embedded on the left side of the bottom of the bottom integrated tank 11, the pressure sensor 21 is connected to the central processing unit 23 through a wire 22, and the automatic slag discharge valve 13 is connected to the control power supply 24 through a wire 22; The filter box 3 is equipped with a slag discharge port 12 at the bottom and a slag discharge door 7 at the top. An electromagnetic push rod 30 is installed on the right side of the slag discharge door 7. The electromagnetic push rod 30 is connected to the automatic slag discharge valve 13 and the PLC controller 16 through a wire 22. A pipe 5 is installed on the upper left side of the filter box 3. The filter box 3 is connected to the nitrogen generator 2 through the pipe 5. The nitrogen generator 2 is connected to the gas storage tank 35 through the pipe 5. Furthermore, the fan 29 installed on the rear side of the bottom integrated tank 11 can disperse the sticky oil sludge deposited in the tank through airflow disturbance, facilitating subsequent sludge discharge. The fan 29 is connected to the central processing unit 23 via the wire 22. After the dust-laden gas is filtered by the coarse filter 9, the oil mist removal layer 26, and the fine filter 10, the separated large particles of dust and oil mist condensate fall into the bottom integrated tank 11 under gravity. The top filter 17 further intercepts fine particles of 0.52μm, causing all impurities to gather at the bottom of the tank. During this process, the fan 29 disperses the deposited oil sludge through airflow, preventing it from adhering to the tank wall and forming hard clumps. The pressure sensor 21 transmits the pressure value in the bottom integrated tank 11 to the central processing unit 23 in real time via the wire 22. When the impurities accumulate to the point where the pressure reaches the preset threshold of 2.5~3.5kPa, the pressure sensor 21 transmits a signal to the central processing unit 23, which then sends a signal to the PLC control unit. When the device 16 sends a slag discharge command, the PLC controller 16 first adjusts the regulating valve 6 of the pipeline 5 between the filter box 3 and the nitrogen generator 2 via the wire 22 to suspend gas delivery. At the same time, the central processing unit 23 activates the electromagnetic push rod 30 via the wire 22 to drive the slag discharge door 7 from the closed state to the open state. After the slag discharge door 7 is opened, the impurities in the tank are discharged into the outside through the slag discharge port 12 under the action of gravity and the auxiliary airflow of the blower 29. The pressure sensor 21 continuously monitors the pressure change. When the pressure drops to the reset threshold of 0.3~0.8kPa, it sends a signal that the slag discharge is completed. The PLC controller 16 first closes the automatic slag discharge valve 13, drives the electromagnetic push rod 30 to reset, and the slag discharge door 7 closes. After the slag discharge door 7 is closed, the electromagnetic push rod 30 transmits a signal to the central processing unit 23 via the wire 22. The central processing unit 23 reopens the regulating valve 6 of the pipeline 5 between the filter box 3 and the nitrogen generator 2 to resume gas delivery.

[0020] Example 3: Please refer to Figure 1 and Figure 2 A nitrogen generator with dust filtration function, wherein the control unit 4 is connected to the filter box 3 through a pipe 5, and a regulating valve 6 is installed at the connection of the pipe 5. The control unit 4 is connected to the nitrogen generator tower 2 through a pipe 5. The nitrogen generator tower 2 is connected to the gas storage tank 35 through a pipe 5. A regulating valve 6 is installed at the connection between the top of the nitrogen generator tower 2 and the gas storage tank 35 and the pipe 5. The regulating valve 6 is connected to the central processing unit 23 through a wire 22. A PLC controller 16 is installed on the bottom inside the control unit 4. The front side of the PLC controller 16 is connected to the rear side of the refrigerant 14. An evaporator 15 is installed on the front side of the refrigerant 14. A fine filter membrane 34 is installed on the upper side inside the control unit 4. A fan 29 is installed on the rear side outside the control unit 4. Furthermore, the evaporator 15 has aluminum fins coated with a hydrophilic coating to facilitate the sliding of condensate. The fine filter membrane 34 is a folded PTFE membrane module connected to the inner wall of the control unit 4 via a quick-connect flange. The gas purified by the filter box 3 enters the control unit 4 through the pipe 5. After entering the control unit 4, the gas first flows through the evaporator 15. The PLC controller 16 controls the flow rate of refrigerant 14 based on the real-time temperature feedback from the temperature sensor 25 via the wire 22, with a preset threshold of 46℃. When the temperature is higher than 6℃, the refrigerant supply is increased; when it is lower than 4℃, the supply is reduced to avoid excessive cooling and freezing. After cooling, water vapor in the gas condenses into water droplets on the fin surface of the evaporator 15 and slides down the hydrophilic coating to the water collection tray 31 at the bottom of the inner side of the control unit 4, and is discharged through the drain pipe 32. The dehydrated gas continues to flow upward and passes through the fine filter membrane 34, where residual ultrafine dust of 0.11μm is intercepted by the membrane module, ultimately forming a clean and dry gas. The dry raw material gas is circulated by the fan 29 throughout the process, driving the internal airflow of the controller 4. On the one hand, it evenly diffuses the cooling energy of the evaporator 15, making the gas cooling more uniform; on the other hand, it removes the heat generated by the PLC controller 16 during operation, keeping the internal temperature of the controller 4 ≤30℃, ensuring the stable operation of electronic components. The pretreated gas enters the nitrogen generator 2 through the pipeline 5. The central processing unit 23 dynamically adjusts the opening of the regulating valve 6 between the controller 4 and the nitrogen generator 2 based on the feedback from the nitrogen concentration sensor 27 in the nitrogen generator 2, which detects a range of 95%~99.99%. If the nitrogen purity is lower than 95%, the opening is reduced to 40%~50%, extending the residence time of the gas in the molecular sieve 18 to improve adsorption sufficiency. If the purity is ≥99.99% and the pressure in the gas storage tank 35 is lower than 0.5MPa, the opening is increased to 80%~100%, increasing the nitrogen production. The nitrogen produced by the nitrogen generator 2 enters the gas storage tank 35 through the top regulating valve 6.

[0021] Example 4: Please refer to Figure 2 and Figure 4 A nitrogen generator with dust filtration function, wherein a central processing unit 23 is installed in the middle of the inner side of the PLC controller 16, a control power supply 24 is installed on the left side of the inner side of the PLC controller 16, a temperature sensor 25 is installed on the upper side of the inner side of the PLC controller 16, the control power supply 24 and the temperature sensor 25 are connected to the central processing unit 23 through wires 22, the control power supply 24 is connected to an external power source through wires 22, the PLC controller 16 is connected to a pressure sensor 21, an electromagnetic push rod 30 and a nitrogen concentration sensor 27 through wires 22, a water receiving tray 31 is installed at the bottom of the inner side of the controller 4, and a drain pipe 32 is embedded in the controller 4 and the water receiving tray 31. Furthermore, the PLC controller 16 provides installation locations for the control power supply 24, temperature sensor 25, and central processing unit 23. After the nitrogen generator 2 starts, the control power supply 24 connects to the external power supply to power the central processing unit 23 and various sensors. The central processing unit 23 initializes the system parameters. When the filtered gas enters the controller 4 through the pipe 5, it first flows through the evaporator 15. The central processing unit 23 instructs the refrigerant 14 to start. The refrigerant enters the evaporator 15 through the copper pipe, absorbing heat from the gas and lowering the gas temperature to 5~10℃, condensing the water vapor in it. This prevents moisture from entering the nitrogen generator 2 and affecting the performance of the molecular sieve 18. The condensate drips along the surface of the evaporator 15 to the bottom water receiving pan 31 and is discharged through the drain pipe 32, thus cooling and dehydrating the gas. The gas continues to flow upwards, passing through the fine filter membrane 34 to intercept residual ultrafine dust, ensuring the cleanliness of the gas entering subsequent stages. At the same time, the fan 29 on the rear side of the control unit 4 starts, accelerating the airflow circulation inside the control unit 4. On the one hand, it evenly diffuses the cooling energy generated by the evaporator 15, improving the cooling efficiency; on the other hand, it removes the heat generated by the PLC controller 16 inside the control unit 4, keeping the internal temperature below 30°C and ensuring stable operation of the components. During operation, the central processing unit 23 receives signals from various sensors in real time. The pressure sensor 21 provides feedback on the pressure data of the bottom integrated tank 11, the electromagnetic push rod 30 provides feedback on the opening and closing status of the automatic slag discharge valve 13, and the nitrogen concentration sensor 27 monitors the nitrogen purity of the treated gas.

[0022] Example 5: Please refer to Figure 2 and Figure 5 A nitrogen generator with dust filtration function is provided. An exhaust valve 36 is installed on the upper side of the nitrogen generator tower 2. A bolt 28 is embedded in the top of the outer side of the nitrogen generator tower 2. Gas distribution plates 19 are installed on both the upper and lower sides of the nitrogen generator tower 2. Molecular sieves 18 are filled in the middle of the gas distribution plates 19. A support plate 20 is installed on the lower side of the lower gas distribution plate 19. A pressure plate 33 is installed on the lower side of the upper gas distribution plate 19. A spring 37 is installed between the pressure plate 33 and the gas distribution plate 19. A guide rod 38 is vertically embedded in the pressure plate 33. The guide rod 38 is connected to the bolt 28. A nitrogen concentration sensor 27 is installed on the inner wall of the left side of the nitrogen generator tower 2. The nitrogen concentration sensor 27 is connected to the central processing unit 23 through a wire 22. Furthermore, the bolts 28 embedded in the top of the outer side of the nitrogen generator tower 2 provide an installation reference for the guide rod 38. The molecular sieve 18 is a 13X type spherical carbon molecular sieve 18, which can efficiently separate nitrogen from the air. The clean gas pretreated by the controller 4 enters the nitrogen generator tower 2 through the pipe 5 and the regulating valve 6. The gas is evenly diffused to the molecular sieve 18 through the pores of the gas distribution plate 19. When the gas permeates, the molecular sieve 18 preferentially adsorbs oxygen molecules. The adsorption force of the molecular sieve 18 for oxygen molecules is 3 to 4 times that for nitrogen. Nitrogen molecules, due to their weaker adsorption force, pass through the molecular sieve 18 and rise upwards. The dynamic clamping assembly of pressure plate 33 and guide rod 38 continuously applies axial pressure through spring 37 to counteract the loosening effect of airflow impact on molecular sieve 18, ensuring tight contact between particles and avoiding the formation of airflow short-circuit channels. When gas flows through the middle of the tower, nitrogen concentration sensor 27 detects purity in real time and transmits the data to central processor 23 through wire 22. If the purity is within the preset threshold of 95%~99.99%, central processor 23 transmits a signal to regulating valve 6 at the top of the tower through wire 22. Regulating valve 6 opens, and nitrogen flows through the upper layer of the gas. After secondary equalization, the gas is transported to the gas storage tank 35 via the gas plate 19. If the purity is lower than 95%, the intake air volume is reduced by adjusting the regulating valve 6 to extend the adsorption time. When the nitrogen concentration sensor 27 detects that the nitrogen purity is lower than 95% for 30 seconds, the information is transmitted to the central processor 23 via the wire 22. The central processor 23 determines that the molecular sieve 18 has reached saturation in adsorbing oxygen. At this time, the central processor 23 starts the regeneration program, closes the intake valve 6 at the top of the nitrogen generator tower 2, and opens the exhaust valve 36, causing the molecular sieve 18 to release the adsorbed oxygen. A small amount of pure nitrogen is introduced into the gas storage tank 35 as flushing gas to purge the molecular sieve 18 layers from top to bottom, and the residual oxygen is discharged from the exhaust valve 36. During the regeneration process, the spring 37 expands and contracts slightly with the pressure change in the tower to maintain the stability of the molecular sieve 18 and avoid displacement of the molecular sieve 18 particles due to pressure fluctuations. After long-term operation, the molecular sieve 18 will experience slight settling due to particle wear and compression. At this time, the spring 37 will automatically release its elastic potential energy and push the pressure plate 33 to move down synchronously along the guide rod 38 to compensate for the settling gap in real time and ensure that the molecular sieve 18 is always kept compacted.

[0023] Working principle: External dust-laden gas enters the filter box 3 through the air inlet 8. First, it passes through the coarse filter 9, which intercepts large particles of dust such as sand and fibers. The impurities slide down to the bottom integrated tank 11 under gravity. The pre-filtered gas then enters the oil mist removal layer 26, where it adsorbs oil mist and water vapor. The resulting oil film or water droplets fall to the bottom integrated tank 11. The de-oiled and dehydrated gas flows through the fine filter 10, which intercepts fine particles such as PM2.5. The filter 17 at the top of the bottom integrated tank 11 further intercepts fine impurities agitated by the airflow, preventing secondary pollution from gas flow. The pressure sensor 21 inside the bottom integrated tank 11 monitors the impurity accumulation pressure in real time. When the preset threshold of 2.5~3.5 kPa is reached, a signal is transmitted to the control unit 4. The central processing unit 23 instructs the automatic slag discharge valve 13 to open, driving the electromagnetic push rod 30 to open the slag discharge port 12. Impurities are discharged under the action of gravity and the auxiliary airflow of the fan 29. When the pressure drops to the reset threshold of 0.3~0.8kPa, the automatic slag discharge valve 13 and the slag discharge door 7 close, completing the automatic cleaning without manual intervention. The filtered clean gas enters the controller 4 through the pipeline 5, first flowing through the evaporator 15. The PLC controller 16, based on the feedback from the temperature sensor 25, adjusts the refrigerant flow rate 14 to control the gas temperature at 46℃, causing water vapor to condense into water droplets, which slide down the hydrophilic coating to the water receiving tray 31 and are discharged through the drain pipe 32. The dehydrated gas flows through the fine filter membrane 34, intercepting 0.11μm. Ultrafine dust particles of m are used to ensure gas cleanliness. The regulating valve 6 on pipe 5 adjusts the air intake according to the needs of nitrogen generator 2, controlled in real-time by the central processor 23. The pre-treated clean gas enters nitrogen generator 2 through pipe 5 and is evenly diffused through the gas distribution plate 19 to the 13X-type spherical carbon molecular sieve 18 layer. The molecular sieve 18 preferentially adsorbs oxygen molecules, while nitrogen molecules, due to weaker adsorption, pass through the molecular sieve 18 and flow upwards. The pressure plate 33 and guide rod 38 under the upper gas distribution plate 19 continuously apply axial pressure through spring 37 to counteract the loosening of the molecular sieve 18 caused by airflow impact, preventing airflow short circuits. The nitrogen concentration sensor 27 inside nitrogen generator 2 detects nitrogen purity in real-time (95%~99.99%), and the data is transmitted to the central processor. If the purity of the nitrogen generator 23 meets the standard, the central processing unit 23 instructs the regulating valve 6 at the top of the tower to open, and the nitrogen gas enters the storage tank 35 after secondary equalization through the upper gas distribution plate 19. If the purity is lower than 95%, the intake volume is reduced and the adsorption time is extended. When the purity of the molecular sieve 18, which is saturated with oxygen, is lower than 95% for 30 seconds, the central processing unit 23 starts the regeneration program: closes the intake valve, opens the exhaust valve 36, introduces a small amount of pure nitrogen gas to purge the molecular sieve 18, releases the adsorbed oxygen, and resumes nitrogen production after regeneration. The high-purity nitrogen gas produced by the nitrogen generator tower 2 is transported to the storage tank 35 through the pipeline 5. The pipeline 5 connecting the storage tank 35 and the nitrogen generator tower 2 is equipped with a regulating valve 6, which is dynamically adjusted by the central processing unit 23 according to the pressure inside the tank to ensure a stable gas supply.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A nitrogen generator with dust filtration function, characterized in that: The filter includes a base (1), a nitrogen generator (2), and a filter box (3). The filter box (3) is installed on the upper left side of the base (1). A control unit (4) is installed on the outer right side of the filter box (3). The nitrogen generator (2) is installed on the outer right side of the control unit (4). A gas storage tank (35) is installed on the outer right side of the nitrogen generator (2). An air inlet (8) is installed on the front side of the filter box (3). A coarse filter (9) is installed on the front side of the filter box (3). A fine filter (10) is installed on the rear side of the filter box (3). An oil mist removal layer (26) is installed between the coarse filter (9) and the fine filter (10). A bottom integrated groove (11) is installed at the bottom of the filter box (3).

2. A nitrogen generator with dust filtration function according to claim 1, characterized in that: A horizontally placed filter screen (17) is installed on the top of the bottom integrated tank (11). A fan (29) is embedded on the rear side of the bottom integrated tank (11). An automatic slag discharge valve (13) is embedded on the left side inside the bottom integrated tank (11). A pressure sensor (21) is embedded on the left side of the bottom of the bottom integrated tank (11). The pressure sensor (21) is connected to the central processing unit (23) through a wire (22). The automatic slag discharge valve (13) is connected to the control power supply (24) through a wire (22).

3. A nitrogen generator with dust filtration function according to claim 2, characterized in that: The filter box (3) is equipped with a slag discharge port (12) at the bottom and a slag discharge door (7) at the top of the slag discharge port (12). An electromagnetic push rod (30) is installed on the right side of the slag discharge door (7). The electromagnetic push rod (30) is connected to the automatic slag discharge valve (13) and the PLC controller (16) through a wire (22). A pipe (5) is installed on the upper left side of the filter box (3). The filter box (3) is connected to the nitrogen generator (2) through the pipe (5). The nitrogen generator (2) is connected to the gas storage tank (35) through the pipe (5).

4. A nitrogen generator with dust filtration function according to claim 1, characterized in that: The controller (4) is connected to the filter box (3) via a pipe (5). A regulating valve (6) is installed at the connection of the pipe (5). The controller (4) is connected to the nitrogen generator (2) via a pipe (5). The nitrogen generator (2) is connected to the gas storage tank (35) via a pipe (5). A regulating valve (6) is installed at the connection between the top of the nitrogen generator (2) and the gas storage tank (35) and the pipe (5). The regulating valve (6) is connected to the central processing unit (23) via a wire (22).

5. A nitrogen generator with dust filtration function according to claim 1, characterized in that: A PLC controller (16) is installed on the bottom inside the control unit (4). The front side of the PLC controller (16) is connected to the rear side of the refrigerant (14). An evaporator (15) is installed on the front side of the refrigerant (14). A fine filter membrane (34) is installed on the upper inside of the control unit (4). A fan (29) is installed on the rear outside of the control unit (4).

6. A nitrogen generator with dust filtration function according to claim 5, characterized in that: The PLC controller (16) has a central processing unit (23) installed in the middle of its inner side. The PLC controller (16) has a control power supply (24) installed on the left side of its inner side. The PLC controller (16) has a temperature sensor (25) installed on its upper inner side. The control power supply (24) and the temperature sensor (25) are connected to the central processing unit (23) through wires (22). The control power supply (24) is connected to an external power source through wires (22). The PLC controller (16) is connected to a pressure sensor (21), an electromagnetic push rod (30), and a nitrogen concentration sensor (27) through wires (22). The controller (4) has a water receiving tray (31) installed at its bottom inner side. A drain pipe (32) is embedded at the connection between the controller (4) and the water receiving tray (31).

7. A nitrogen generator with dust filtration function according to claim 1, characterized in that: An exhaust valve (36) is installed on the upper side of the nitrogen generator (2). A bolt (28) is embedded in the top of the outer side of the nitrogen generator (2). Gas distribution plates (19) are installed on both the upper and lower sides inside the nitrogen generator (2). Molecular sieves (18) are filled in the middle of the gas distribution plates (19) on both sides. A support plate (20) is installed on the lower side of the lower gas distribution plate (19). A pressure plate (33) is installed on the lower side of the upper gas distribution plate (19). A spring (37) is installed between the pressure plate (33) and the gas distribution plate (19). A guide rod (38) is vertically embedded in the pressure plate (33). The guide rod (38) is connected to the bolt (28). A nitrogen concentration sensor (27) is installed on the inner wall of the left side of the nitrogen generator (2). The nitrogen concentration sensor (27) is connected to the central processing unit (23) through a wire (22).

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