Nitrogen generator with top clean nitrogen gas blowback

Abstract

The utility model provides a kind of nitrogen generator of top clean nitrogen gas blowback by advantage, it include: nitrogen generator and blowback mechanism, wherein, blowback mechanism includes air outlet pipe, air pump, air inlet pipe, solenoid valve and flow guide assembly, wherein, one end of air outlet pipe is connected with nitrogen generator, the output end of air pump is connected with the other end of air outlet pipe, one end of air inlet pipe is connected with the input end of air pump, solenoid valve is set on air inlet pipe, the inside installation of air outlet pipe has flow guide assembly.The utility model of a kind of nitrogen generator of top clean nitrogen gas blowback by advantage, by the cooperation of blowback mechanism and flow guide assembly, not only realizes the efficient blowback of adsorption tower, also significantly improves the purity of nitrogen and the stability of equipment, in specific implementation process, blowback mechanism can accurately control the flow and pressure of nitrogen, ensure that blowback process is thorough and efficient, simultaneously, the setting of flow guide assembly makes that blowback nitrogen forms spiral airflow, more evenly washes the surface of molecular sieve in tower.

Description

Technical Field

[0001] The technical field of this utility model of nitrogen generator is particularly related to a nitrogen generator that uses top-clean nitrogen gas for backflushing. Background Technology

[0002] A nitrogen generator is a method that uses air as raw material and carbon molecular sieve as adsorbent. It utilizes the principle of pressure swing adsorption (PSA) to separate nitrogen and oxygen by selectively adsorbing oxygen and nitrogen through carbon molecular sieve. This method is a new nitrogen generation technology that developed rapidly in the 1970s. Compared with traditional nitrogen generation methods, it has the advantages of simple process flow, high degree of automation, fast gas production, low energy consumption, product purity that can be adjusted within a wide range according to user needs, convenient operation and maintenance, low operating cost, and strong adaptability.

[0003] Currently, nitrogen generators rely on the pressure difference between the adsorption tower and the nitrogen storage tank for natural flow during backflushing. However, pressure fluctuations can cause desorbed oxygen in the adsorption tower to flow back into the storage tank, affecting nitrogen purity and equipment operating efficiency. Furthermore, if the backflushing airflow is not stable enough, adsorbent in dead zones may not be effectively purged, and residual oxygen can mix with the produced nitrogen in the next adsorption cycle, further reducing nitrogen purity. To address this issue, a check valve is typically installed near the nitrogen storage tank in the backflushing pipeline. This valve physically blocks the backflow of oxygen by allowing only nitrogen to flow from the storage tank to the adsorption tower. However, this method has limitations. The sealing performance of the check valve decreases over time, especially after frequent opening and closing. If the seals wear, minor leaks may still occur. Additionally, this method cannot completely solve the problem of instantaneous backflow caused by pressure fluctuations, such as the sudden pressure drop at the end of backflushing. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0005] Therefore, this utility model provides a nitrogen generator with top-mounted clean nitrogen backflushing. Through the combined use of the backflushing mechanism and the flow guiding component, it not only achieves efficient backflushing of the adsorption tower, but also significantly improves the purity of nitrogen and the stability of the equipment. In the specific implementation process, the backflushing mechanism can accurately control the flow rate and pressure of nitrogen, ensuring that the backflushing process is both thorough and efficient. At the same time, the flow guiding component makes the backflushing nitrogen form a spiral airflow, which more evenly washes the surface of the molecular sieve inside the tower, effectively reducing problems such as oxygen residue.

[0006] To achieve the above objectives, the first aspect of this utility model proposes a nitrogen generator with top-mounted clean nitrogen backflushing, comprising: a nitrogen generator and a backflushing mechanism, wherein the backflushing mechanism includes an outlet pipe, an air pump, an inlet pipe, a solenoid valve, and a flow guiding component, wherein one end of the outlet pipe is connected to the nitrogen generator, the output end of the air pump is connected to the other end of the outlet pipe, one end of the inlet pipe is connected to the input end of the air pump, the solenoid valve is installed on the inlet pipe, and a flow guiding component is installed inside the outlet pipe.

[0007] In addition, the nitrogen generator with top-clean nitrogen backflushing proposed above according to this utility model may also have the following additional technical features: Specifically, the flow guiding assembly includes a fixed block, a threaded rod, a rotating shaft, and a flow guiding impeller. The fixed block is disposed on the inner wall of the outlet pipe, the threaded rod is threadedly connected to the fixed block, one end of the rotating shaft is connected to the other end of the threaded rod, and the flow guiding impeller is disposed on the outer wall of the rotating shaft.

[0008] Specifically, the nitrogen generator has a buffer assembly inside, which includes a mounting ring, a filter screen, and a sealing ring. The mounting ring is located inside the nitrogen generator, the filter screen is located on the inner wall of the mounting ring, the outer wall of the mounting ring has a mounting groove, and the sealing ring is located inside the mounting groove.

[0009] Specifically, the nitrogen generator is equipped with a fixed support.

[0010] Specifically, a control console is installed on the outer wall of the fixed bracket.

[0011] Specifically, the control panel is equipped with an audible and visual alarm buzzer.

[0012] Specifically, a lower differential pressure transmitter is installed on the bottom wall of the nitrogen generator, and an upper differential pressure transmitter is installed on the top of the nitrogen generator.

[0013] Specifically, an observation window is provided on the outer wall of the nitrogen generator.

[0014] Compared with existing technologies, this utility model of a nitrogen generator with top-clean nitrogen backflushing not only achieves efficient backflushing of the adsorption tower through the combined use of the backflushing mechanism and the flow guiding component, but also significantly improves the purity of nitrogen and the stability of the equipment. In the specific implementation process, the backflushing mechanism can accurately control the flow rate and pressure of nitrogen to ensure that the backflushing process is both thorough and efficient. At the same time, the setting of the flow guiding component makes the backflushing nitrogen form a spiral airflow, which more evenly washes the surface of the molecular sieve in the tower, effectively reducing problems such as oxygen residue.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of a nitrogen generator with top-clean nitrogen backflushing according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a backflushing mechanism for a nitrogen generator with top-clean nitrogen backflushing according to an embodiment of the present invention. Figure 3 This is a schematic diagram of a nitrogen generator flow guiding component for top-clean nitrogen backflushing according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a buffer assembly for a nitrogen generator that uses top-clean nitrogen backflushing, according to an embodiment of the present invention.

[0017] Attached figures: 1. Nitrogen generator; 2. Backflush mechanism; 21. Outlet pipe; 22. Air pump; 23. Inlet pipe; 24. Solenoid valve; 3. Flow guide assembly; 31. Fixing block; 32. Threaded rod; 33. Rotating shaft; 34. Flow guide impeller; 4. Buffer assembly; 41. Mounting ring; 42. Filter screen; 43. Mounting groove; 44. Sealing ring; 5. Fixing bracket; 6. Control console; 7. Audible and visual alarm buzzer; 81. Lower differential pressure transmitter; 82. Upper differential pressure transmitter; 9. Observation window. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] The following describes an embodiment of the present invention with reference to the accompanying drawings: a nitrogen generator with top-clean nitrogen backflushing.

[0020] like Figures 1-4 As shown in the figure, a nitrogen generator with top clean nitrogen backflushing according to an embodiment of the present invention includes: a nitrogen generator 1 and a backflushing mechanism 2.

[0021] The backflush mechanism 2 includes an air outlet pipe 21, an air pump 22, an air inlet pipe 23, a solenoid valve 24, and a flow guide assembly 3. One end of the outlet pipe 21 is connected to the nitrogen generator 1, the output end of the air pump 22 is connected to the other end of the outlet pipe 21, one end of the inlet pipe 23 is connected to the input end of the air pump 22, the solenoid valve 24 is installed on the inlet pipe 23, and the flow guide assembly 3 is installed inside the outlet pipe 21.

[0022] It should be noted that one end of the air inlet pipe 23 is connected to the input end of the air pump 22, while the other end of the air inlet pipe 23 is connected to the nitrogen storage tank.

[0023] Specifically, when backflushing the adsorption tower on nitrogen generator 1 is required, the solenoid valve 24 and the air pump 22 are started synchronously to form an active positive pressure barrier. The air pump 22 draws nitrogen from the nitrogen storage tank and pressurizes it through the air inlet pipe 23, ensuring that the pressure in the backflushing pipeline is always higher than that of the adsorption tower, fundamentally blocking the oxygen backflow path. The pressurized nitrogen gas then enters the adsorption tower through the outlet pipe 21 to backflush the adsorption tower. During the backflushing process, since the outlet pipe 21 is equipped with a flow guiding component 3, when nitrogen is pressurized and enters the adsorption tower through the outlet pipe 21, the flow guiding impeller 34 causes the backflushing nitrogen to form a spiral airflow that flows downward. Compared with the traditional direct airflow, the spiral airflow can more evenly scour the surface of the molecular sieve in the tower, especially cleaning the adsorbent near the tower wall and the area where oxygen residue is easily formed more thoroughly, thus improving the backflushing efficiency and nitrogen purity.

[0024] In one embodiment of this application, such as Figure 3 As shown, the flow guiding assembly 3 includes a fixed block 31, a threaded rod 32, a rotating shaft 33, and a flow guiding impeller 34.

[0025] The fixed block 31 is installed on the inner wall of the air outlet pipe 21, the threaded rod 32 is threadedly connected to the fixed block 31, one end of the rotating shaft 33 is connected to the other end of the threaded rod 32, and the guide impeller 34 is installed on the outer wall of the rotating shaft 33.

[0026] In one embodiment of this application, such as Figure 4 As shown, the nitrogen generator 1 has a buffer assembly 4 installed inside.

[0027] The buffer assembly 4 includes a mounting ring 41, a filter screen 42, and a sealing ring 44. The mounting ring 41 is located inside the nitrogen generator 1, the filter screen 42 is located on the inner wall of the mounting ring 41, the outer wall of the mounting ring 41 is provided with a mounting groove 43, and the sealing ring 44 is located inside the mounting groove 43.

[0028] It should be noted that 3 to 4 layers of flexible filter screens 42 are arranged in the adsorption tower according to height. At the same time, the filter screen 42 should be made of aging-resistant polytetrafluoroethylene. The pore size of the filter screen 42 gradually decreases from bottom to top, with the bottom layer being about 100μm and the top layer being about 50μm.

[0029] Understandably, the multi-layer filter screen 42 effectively reduces the direct impact of airflow on the carbon molecular sieve, significantly reduces the pulverization rate, thereby extending the service life of the adsorbent and reducing equipment downtime caused by powder blockage. At the same time, the sealing ring 44 effectively prevents oxygen from seeping into other filter layers through the gap between the tower wall and the mounting ring 41, further improving the purity of nitrogen. In addition, the mounting ring 41 and the design of the multi-layer filter screen 42 allow each filter screen 42 to be replaced independently, which not only significantly improves the convenience of maintenance but also effectively reduces maintenance costs.

[0030] In one embodiment of this application, such as Figure 1 As shown, a fixed bracket 5 is installed on the nitrogen generator 1.

[0031] Understandably, the fixed bracket 5 provides a stable mounting position for the console 6, ensuring its stability and reliability during use.

[0032] In one embodiment of this application, such as Figure 1 As shown, a control console 6 is provided on the outer wall of the fixed bracket 5.

[0033] Understandably, the control console 6, as the control center of the entire nitrogen generator 1, integrates multiple control and display functions, making it convenient for operators to monitor and operate the nitrogen generator 1 in real time. The control console 6 is equipped with various control buttons, displays and indicator lights, which can display the working status of the nitrogen generator 1, nitrogen purity, pressure and other key parameters in real time, so that operators can intuitively understand the operating status of the nitrogen generator 1 and make corresponding adjustments and controls as needed.

[0034] In one embodiment of this application, such as Figure 1 As shown, the console 6 is equipped with an audible and visual alarm buzzer 7.

[0035] Understandably, when nitrogen generator 1 malfunctions or encounters abnormalities during operation, such as substandard nitrogen purity or abnormal pressure, the audible and visual alarm buzzer 7 can immediately issue audible and visual alarm signals to remind operators to pay attention and take appropriate measures, thereby effectively preventing the malfunction from escalating further and ensuring the safe and stable operation of nitrogen generator 1.

[0036] In one embodiment of this application, such as Figure 1 As shown, a lower differential pressure transmitter 81 is installed on the bottom wall of the nitrogen generator 1, and an upper differential pressure transmitter 82 is installed on the nitrogen generator 1.

[0037] Understandably, the lower differential pressure transmitter 81 and the upper differential pressure transmitter 82 are designed to monitor the pressure difference between the upper and lower pipelines of the nitrogen generator 1 in real time, providing operators with crucial pressure data. When abnormal pressure fluctuations occur in the upper and lower pipelines of the nitrogen generator 1, the lower differential pressure transmitter 81 and the upper differential pressure transmitter 82 can quickly detect this change and transmit the signal to the control console 6. Operators can observe the changes in pressure difference in real time through the display screen on the control console 6, thereby promptly determining whether the working status of the nitrogen generator 1 is normal. If the pressure difference exceeds the preset range, operators can immediately take measures to adjust it to avoid equipment failure or nitrogen purity reduction caused by abnormal pressure.

[0038] In one embodiment of this application, such as Figure 1 As shown, an observation window 9 is provided on the outer wall of the nitrogen generator 1.

[0039] It should be noted that the observation window 9 should be made of a transparent, high-temperature resistant material.

[0040] Understandably, by setting up observation window 9, the state of the molecular sieve inside the tower can be directly observed, such as whether it is pulverized, agglomerated, or has an abnormal liquid level, which facilitates early detection of problems.

[0041] Working principle: When backflushing the adsorption tower on nitrogen generator 1 is required, the solenoid valve 24 and the air pump 22 are started synchronously to form an active positive pressure barrier. The air pump 22 draws nitrogen from the nitrogen storage tank through the air inlet pipe 23 and pressurizes it, so that the pressure in the backflushing pipeline is always higher than that of the adsorption tower, fundamentally blocking the oxygen backflow path. The pressurized nitrogen gas exit pipe 21 enters the adsorption tower to backflush the adsorption tower. During the backflushing process, due to the flow guiding component 3 installed inside the outlet pipe 21, when nitrogen gas is pressurized and enters the adsorption tower through the outlet pipe 21, the flow guiding impeller 34 causes the backflushing nitrogen gas to form a spiral airflow that flows downwards. Compared with the traditional direct airflow, the spiral airflow can more evenly scour the surface of the molecular sieve inside the tower, especially cleaning the adsorbent near the tower wall and areas prone to oxygen residue formation more thoroughly, thus improving the backflushing efficiency and nitrogen purity. Furthermore, the multi-layer filter screen 42 effectively reduces the direct impact of airflow on the carbon molecular sieve, significantly reducing the pulverization rate and thus extending the service life of the adsorbent and reducing equipment downtime caused by powder blockage. At the same time, the sealing ring 44 effectively prevents oxygen from seeping into other filter layers through the gap between the tower wall and the mounting ring 41, further improving the purity of nitrogen. In addition, the mounting ring 41 and the multi-layer filter screen 42 design allow each filter screen 42 to be replaced independently, which not only significantly improves the convenience of maintenance but also effectively reduces maintenance costs.

[0042] In summary, this utility model of a nitrogen generator with top-mounted clean nitrogen backflushing, through the combined use of the backflushing mechanism 2 and the flow guiding component 3, not only achieves efficient backflushing of the adsorption tower, but also significantly improves the purity of nitrogen and the stability of the equipment. In specific implementation, the backflushing mechanism 2 can precisely control the flow rate and pressure of nitrogen, ensuring that the backflushing process is both thorough and efficient. At the same time, the flow guiding component 3 makes the backflushing nitrogen form a spiral airflow, which more evenly washes the surface of the molecular sieve inside the tower, effectively reducing problems such as oxygen residue.

[0043] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A nitrogen generator with top-mounted clean nitrogen backflushing, characterized in that, include: A nitrogen generator (1) and a backflushing mechanism (2), wherein the backflushing mechanism (2) includes an outlet pipe (21), an air pump (22), an inlet pipe (23), a solenoid valve (24), and a flow guiding component (3). One end of the outlet pipe (21) is connected to the nitrogen generator (1), the output end of the air pump (22) is connected to the other end of the outlet pipe (21), one end of the inlet pipe (23) is connected to the input end of the air pump (22), the solenoid valve (24) is installed on the inlet pipe (23), and the flow guiding component (3) is installed inside the outlet pipe (21).

2. A nitrogen generator with top-mounted clean nitrogen backflushing as described in claim 1, characterized in that, The flow guiding assembly (3) includes a fixed block (31), a threaded rod (32), a rotating shaft (33), and a flow guiding impeller (34). The fixed block (31) is disposed on the inner wall of the air outlet pipe (21), the threaded rod (32) is threadedly connected to the fixed block (31), one end of the rotating shaft (33) is connected to the other end of the threaded rod (32), and the flow guiding impeller (34) is disposed on the outer wall of the rotating shaft (33).

3. A nitrogen generator with top-mounted clean nitrogen backflushing as described in claim 1, characterized in that, The nitrogen generator (1) is provided with a buffer assembly (4) inside. The buffer assembly (4) includes a mounting ring (41), a filter screen (42) and a sealing ring (44). The mounting ring (41) is located inside the nitrogen generator (1), the filter screen (42) is located on the inner wall of the mounting ring (41), the outer wall of the mounting ring (41) is provided with a mounting groove (43), and the sealing ring (44) is located inside the mounting groove (43).

4. A nitrogen generator with top-mounted clean nitrogen backflushing as described in claim 1, characterized in that, The nitrogen generator (1) is equipped with a fixed support (5).

5. A nitrogen generator with top-mounted clean nitrogen backflushing as described in claim 4, characterized in that, A control console (6) is provided on the outer wall of the fixed bracket (5).

6. A nitrogen generator with top-mounted clean nitrogen backflushing according to claim 5, characterized in that, The control console (6) is equipped with an audible and visual alarm buzzer (7).

7. A nitrogen generator with top-mounted clean nitrogen backflushing according to claim 1, characterized in that, The nitrogen generator (1) is provided with a lower differential pressure transmitter (81) on its bottom wall and an upper differential pressure transmitter (82) on its top.

8. A nitrogen generator with top-mounted clean nitrogen backflushing according to claim 1, characterized in that, An observation window (9) is provided on the outer wall of the nitrogen generator (1).

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