On-site nitrogen generator

Abstract

The utility model provides an on-site nitrogen generator which comprises an adsorber A and an adsorber B. A pressure balance assembly is arranged between the adsorber A and the adsorber B. The pressure balance assembly comprises an upper pressure equalizing pipe, a middle pressure equalizing pipe, a lower pressure equalizing pipe and pneumatic angle seat valves PV106, PV107 and PV108, the adsorber A is provided with a first nitrogen outlet pipe, the adsorber B is provided with a second nitrogen outlet pipe, and the adsorber B is provided with a second nitrogen outlet pipe. The upper pressure equalizing pipe is connected in parallel between the first nitrogen outlet pipe and the second nitrogen outlet pipe, and the PV108 is arranged on the upper pressure equalizing pipe; the middle pressure equalizing pipe is located in the middle of the adsorber A and the adsorber B, one end of the middle pressure equalizing pipe is communicated with the adsorber A, the other end of the middle pressure equalizing pipe is communicated with the adsorber B, PV106 and PV107 are arranged on the middle pressure equalizing pipe, and the middle pressure equalizing pipe between the PV106 and the PV107 is connected to the main air inlet pipe through the lower pressure equalizing pipe. By changing the position of the pressure balance assembly, pressure balance is better achieved, and the switched adsorber can be quickly put into work.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen production technology, and in particular to an on-site nitrogen generator. Background Technology

[0002] Nitrogen generators are devices that use air as raw material and separate oxygen and nitrogen from the air using physical or chemical methods to obtain nitrogen gas. Industrial nitrogen generators are used to meet various industrial and application needs.

[0003] When switching between two adsorbers in a nitrogen generator, a pressure balancing assembly is used to introduce pressure from the original adsorber into the new one so that it can start operating as quickly as possible. This pressure balancing assembly is typically located on the outlet and inlet pipes of the adsorber. The high-pressure gas from the original adsorber needs to travel a relatively long distance to reach the new adsorber. Furthermore, when balancing the pressure on the inlet pipe, the gas from the original adsorber flows back in reverse, carrying impurities into the new adsorber. Therefore, this directly affects the adsorption efficiency of the new adsorber. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a field nitrogen generator.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a field nitrogen generator, including a nitrogen process tank, an A adsorber and a B adsorber arranged side by side on a base, and a control system is provided on the base between the A adsorber and the B adsorber. The control system is used to control the start-up, shutdown, operation and display of the nitrogen generator.

[0006] A pressure balancing assembly is provided between adsorber A and adsorber B. The pressure balancing assembly includes an upper pressure equalizing pipe, a middle pressure equalizing pipe, a pneumatic angle seat valve PV106, a pneumatic angle seat valve PV107, and a pneumatic angle seat valve PV108. A first nitrogen outlet pipe is provided at the outlet of adsorber A, and a second nitrogen outlet pipe is provided at the outlet of adsorber B. The upper pressure equalizing pipe is connected in parallel between the first and second nitrogen outlet pipes, and the pneumatic angle seat valve PV108 is installed on the upper pressure equalizing pipe. The middle pressure equalizing pipe is located in the middle position between adsorber A and adsorber B, with one end connected to adsorber A and the other end connected to adsorber B. The pneumatic angle seat valves PV106 and PV107 are installed on the middle pressure equalizing pipe, and the middle pressure equalizing pipe between the pneumatic angle seat valves PV106 and PV107 is connected to the main air inlet pipe through a lower pressure equalizing pipe.

[0007] The inlets of the A and B adsorbers are connected to a gas source via an inlet assembly, and their outlets are connected to a nitrogen process tank via an outlet assembly. The outlet of the nitrogen process tank is connected to a gas supply assembly, which provides nitrogen gas.

[0008] Furthermore, the air intake assembly includes a main air intake pipe, a first air intake pipe, a second air intake pipe, an internal thread shut-off valve V101, a pneumatic angle seat valve PV101, a pneumatic angle seat valve PV102, and a pneumatic angle seat valve PV103. One end of the main air intake pipe has an air intake interface, and the other end is divided into two paths connected to the first air intake pipe and the second air intake pipe respectively. The other end of the first air intake pipe is connected to adsorber A, and the other end of the second air intake pipe is connected to adsorber B. The internal thread shut-off valve V101 and the pneumatic angle seat valve PV101 are mounted on the main air intake pipe, the pneumatic angle seat valve PV102 is mounted on the first air intake pipe, and the pneumatic angle seat valve PV103 is mounted on the second air intake pipe.

[0009] A detection pipeline is also provided on the main air inlet pipe between the internal thread shut-off valve V101 and the pneumatic angle seat valve PV101. The detection pipeline is equipped with an internal thread shut-off valve V101 and an air source pressure reducing valve V103.

[0010] The control terminals of the air source pressure reducing valve V103, pneumatic angle seat valve PV101, pneumatic angle seat valve PV102, and pneumatic angle seat valve PV103 are all connected to the control system through the drive air source pipeline, and the control system controls the working status of each valve.

[0011] Furthermore, the gas outlet assembly includes a first nitrogen outlet pipe, a second nitrogen outlet pipe, a manifold, a pneumatic angle seat valve PV109, a pneumatic angle seat valve PV110, a one-way valve V105, an internal thread ball valve V106, and a dust filter F101. One end of the first nitrogen outlet pipe is connected to the outlet of adsorber A, and one end of the second nitrogen outlet pipe is connected to the outlet of adsorber B. The other ends of the first and second nitrogen outlet pipes merge and connect to the manifold, and the other end of the manifold is connected to the inlet of the nitrogen process tank. The pneumatic angle seat valve PV109 is located at the first nitrogen outlet. On the pipe, the pneumatic angle seat valve PV110 is installed on the second nitrogen outlet pipe, the dust filter F101 is installed on the manifold, and the one-way valve V105 is connected in parallel to both ends of the dust filter F101 through the pipeline. The gas flow direction of the one-way valve V105 is opposite to the flow direction inside the dust filter F101. The gas pressure inside the dust filter F101 can be adjusted by the one-way valve V105, and gas backflow can be avoided. The bottom of the dust filter F101 is provided with a drain port, and a first drain pipe is connected to the drain port. The internal thread ball valve V106 is installed on the first drain pipe.

[0012] Furthermore, it also includes a flushing assembly, which includes a flushing pipe and an internally threaded ball valve V104. The flushing pipe is connected in parallel between the first nitrogen outlet pipe and the second nitrogen outlet pipe. The internally threaded ball valve V104 is disposed on the flushing pipe to control the connection and disconnection of the flushing pipe.

[0013] Furthermore, the gas supply assembly includes a gas supply pipe, a digital flow switch FT101, a pressure transmitter PT101, a sterilizing filter F102, internal thread ball valves V110, V111, and V112, and a pneumatic angle seat valve PV111. One end of the gas supply pipe is connected to the outlet of the nitrogen process tank, and the other end is connected to the pure nitrogen outlet. The digital flow switch FT101, pneumatic angle seat valve PV111, internal thread ball valve V111, and sterilizing filter F102 are also included. The sterilization filter F102 is sequentially arranged on the air supply pipe along the airflow direction. The bottom of the sterilization filter F102 is provided with a drain port, and a third drain pipe is connected to the drain port. The internal thread ball valve V112 is arranged on the third drain pipe and is used to control the opening and closing of the third drain pipe. The pressure transmitter PT101 is connected to the air supply pipe between the digital flow switch FT101 and the pneumatic angle seat valve PV111 through a pipeline, and the internal thread ball valve V110 is arranged on this pipeline.

[0014] Furthermore, it also includes a venting assembly, which comprises a first silencer, a second silencer, a first vent pipe, a second vent pipe, a third vent pipe, a pneumatic angle seat valve PV104, a pneumatic angle seat valve PV105, a pneumatic angle seat valve PV112, and an internally threaded shut-off valve V113. One end of the first vent pipe is connected to the first intake pipe, and the other end is connected to the first and second silencers. The pneumatic angle seat valve PV104 is located at the connection between the first vent pipe and the first intake pipe. One end of the second vent pipe is connected to the second air inlet pipe, and the other end is connected to the first silencer and the second silencer. The pneumatic angle seat valve PV105 is located at the connection between the second vent pipe and the second air inlet pipe. One end of the third vent pipe is connected to the air supply pipe between the digital flow switch FT101 and the pneumatic angle seat valve PV111, and the other end is connected to the first silencer and the second silencer. The pneumatic angle seat valve PV112 and the internal thread shut-off valve V113 are sequentially arranged on the third vent pipe along the airflow direction.

[0015] Furthermore, it also includes a sampling assembly, which includes a sampling tube, an internally threaded ball valve V108, a sampling pressure reducing valve V109, an oxygen transmitter, and a dew point transmitter. One end of the sampling tube is connected to the gas supply pipe near the outlet of the nitrogen process tank, and the other end is connected to the sampling pressure reducing valve V109. The outlet of the sampling pressure reducing valve V109 is divided into two paths, which are respectively connected to the oxygen transmitter and the dew point transmitter for detecting the oxygen content and water content in the nitrogen. The internally threaded ball valve V108 is installed on the sampling tube for controlling the opening and closing of the sampling tube.

[0016] Furthermore, the bottom of the nitrogen process tank is also provided with a drain port, and a second drain pipe is connected to the drain port. The second drain pipe is provided with an internally threaded ball valve V107.

[0017] Furthermore, the control system includes an electrical box, on which a touch screen is installed. Above the touch screen, on the electrical box, is a blue screen paperless recorder. Above the blue screen paperless recorder, on the electrical box, are three pressure gauges arranged side by side.

[0018] The beneficial effects of this utility model are:

[0019] (1) By changing the position of the pressure balancing component, pressure balancing can be better achieved and the switched adsorber can be put into operation quickly, thereby reducing the impact of the pressure balancing stage on the adsorption efficiency of the adsorber.

[0020] (2) High-purity nitrogen output: The on-site nitrogen generator uses advanced physical methods, PSA (Pressure Swing Adsorption), to produce nitrogen, effectively separating oxygen and other impurities from the air. The purity of the output nitrogen is monitored in real time by a sampling component and fed back to the control system. Dust filters and sterilization filters are added to the airflow pipeline to generate high-purity nitrogen. Nitrogen purity typically reaches 99.9% or higher, and some equipment can even produce nitrogen with a purity of over 99.999%, meeting the needs of various high-end applications.

[0021] (3) Low-cost operation: Although the initial investment in on-site nitrogen generators may be high, their operating costs are relatively low in the long term. This is because it avoids the costs of liquid nitrogen storage and transportation, and also reduces the cost of replacing and disposing of gas cylinders.

[0022] (4) Energy saving and environmental protection: The on-site nitrogen generator directly separates nitrogen from the air, reducing carbon emissions and exhaust emissions during the storage and transportation of liquid nitrogen. At the same time, some advanced equipment also adopts energy-saving design and energy recovery technology, further reducing energy consumption and environmental pollution.

[0023] (5) Safe and reliable: The equipment has a variety of safety protection mechanisms built in, such as pressure protection of the pressure gauge, which can effectively prevent the equipment from malfunctioning or causing safety accidents during operation. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram illustrating the working principle of the on-site nitrogen generator A adsorber of this utility model.

[0026] Figure 2 This is a schematic diagram illustrating the working principle of the on-site nitrogen generator B adsorber of this utility model.

[0027] Figure 3 This is a schematic diagram of the main structure of the on-site nitrogen generator of this utility model.

[0028] Figure 4 This is a top view schematic diagram of the on-site nitrogen generator of this utility model.

[0029] In the diagram: the dark blue solid line represents the purified air pipeline, the yellow solid line represents the nitrogen pipeline, the red solid line represents the vent pipeline, the light blue dashed line represents the instrument signal line, and the purple dashed line represents the drive air source pipeline.

[0030] 1. Nitrogen process tank; 2. A adsorber; 3. B adsorber; 4. Inlet port; 5. Base; 6. First silencer; 7. Second silencer; 8. Control system; 9. Sampling tube; 10. Pure nitrogen outlet; 11. Oxygen transmitter; 12. Dew point transmitter; 13. Second drain pipe; 14. Blue screen paperless recorder; 15. Pressure gauge; 16. Touch screen; 17. Electrical box; 18. Main inlet pipe; 19. First inlet pipe; 20. Second inlet pipe; 21. First nitrogen outlet pipe; 22. Second nitrogen outlet pipe; 23. Upper equalization pipe; 24. Middle equalization pipe; 25. Flushing pipe; 26. Lower equalization pipe; 27. Manifold; 28. Gas supply pipe; 29. ​​First drain pipe; 30. First vent pipe; 31. Second vent pipe; 32. Third vent pipe; 33. Third drain pipe. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components, orientations, and references (e.g., up, down, left, right, etc.) relevant to the present invention and are intended only to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0032] like Figure 1-Figure 4 As shown, a field nitrogen generator of this utility model includes a nitrogen process tank 1, an A adsorber 2 and a B adsorber 3 arranged side by side on a base 5. A control system 8 is provided on the base 5 between the A adsorber 2 and the B adsorber 3. The control system 8 is used to control the start-up, shutdown, operation and display of the nitrogen generator.

[0033] A pressure balancing assembly is provided between adsorber A 2 and adsorber B 3. The pressure balancing assembly includes an upper equalizing pipe 23, a middle equalizing pipe 24, a pneumatic angle seat valve PV106, a pneumatic angle seat valve PV107, and a pneumatic angle seat valve PV108. A first nitrogen outlet pipe 21 is provided at the outlet of adsorber A 2, and a second nitrogen outlet pipe 22 is provided at the outlet of adsorber B 3. The upper equalizing pipe 23 is connected in parallel between the first and second nitrogen outlet pipes 21 and 22, and the pneumatic angle seat valve PV108 is mounted on the upper equalizing pipe 23. The middle equalizing pipe 24 is located in the middle between adsorber A 2 and adsorber B 3, and one end of the middle equalizing pipe 24 is connected to adsorber A 2. One end is connected to the other end to the B adsorber 3. The pneumatic angle seat valves PV106 and PV107 are installed on the intermediate pressure equalization pipe 24, and the intermediate pressure equalization pipe 24 between the pneumatic angle seat valves PV106 and PV107 is connected to the main air inlet pipe 18 through the lower pressure equalization pipe 26. The inlets of the A adsorber 2 and the B adsorber 3 are connected to the gas source through the air inlet assembly, and the outlets are connected to the nitrogen process tank 1 through the air outlet assembly. The outlet of the nitrogen process tank 1 is connected to the gas supply assembly, and nitrogen is supplied through the gas supply assembly. The bottom of the nitrogen process tank 1 is also provided with a drain port, and a second drain pipe 13 is connected to the drain port. The second drain pipe 13 is provided with an internal thread ball valve V107.

[0034] Taking the switching from generator A to generator B as an example, the working principle of the pressure balancing component is explained as follows: When switching from generator A to generator B, the initial gas pressure in generator B is relatively low, while the pressure in generator A is relatively high. Therefore, the pneumatic angle seat valve PV109 is closed, while the pneumatic angle seat valves PV106, PV107, and PV108 are opened. The first nitrogen outlet pipe 21 and the second nitrogen outlet pipe 22 are connected through the upper equalizing pipe 23, and the middle part of generator A and generator B are connected through the middle equalizing pipe 24. The lower equalizing pipe 26 is connected to the main air inlet pipe 18. Thus, the nitrogen in generator A enters generator B through the upper equalizing pipe 23 and the middle equalizing pipe 24. At the same time, the gas source enters generator B through the main air inlet pipe 18, the lower equalizing pipe 26, and the middle equalizing pipe 24. The gas in generator B is discharged through the second air inlet pipe 20, the second vent pipe 31, and the silencer. The pressure equalization of generator B, combined with the nitrogen in generator A and the gas source, enables rapid pressure boosting of generator B until the pressure inside generator B is the same as that inside generator A. Then, pneumatic angle seat valves PV106, PV107, and PV108 are closed, and pneumatic angle seat valve PV110 is opened, and generator B enters the working state.

[0035] like Figure 1 As shown, the air intake assembly includes a main air intake pipe 18, a first air intake pipe 19, a second air intake pipe 20, an internally threaded shut-off valve V101, a pneumatic angle seat valve PV101, a pneumatic angle seat valve PV102, and a pneumatic angle seat valve PV103. One end of the main air intake pipe 18 has an air intake interface 4, and the other end is divided into two paths, connecting to the first air intake pipe 19 and the second air intake pipe 20 respectively. The other end of the first air intake pipe 19 is connected to adsorber A 2, and the other end of the second air intake pipe 20 is connected to adsorber B 3. The internally threaded shut-off valve V101 and the pneumatic angle seat valve PV101 are mounted on the main air intake pipe 18. A movable angle seat valve PV102 is installed on the first air inlet pipe 19, and a pneumatic angle seat valve PV103 is installed on the second air inlet pipe 20. A detection pipeline is also provided on the main air inlet pipe 18 between the internal thread shut-off valve V101 and the pneumatic angle seat valve PV101. The detection pipeline is equipped with an internal thread shut-off valve V101 and an air source pressure reducing valve V103. The control terminals of the air source pressure reducing valve V103, the pneumatic angle seat valve PV101, the pneumatic angle seat valve PV102, and the pneumatic angle seat valve PV103 are all connected to the control system 8 through the drive air source pipeline. The control system 8 controls the working status of each valve.

[0036] like Figure 1As shown, the gas outlet assembly includes a first nitrogen outlet pipe 21, a second nitrogen outlet pipe 22, a manifold 27, a pneumatic angle seat valve PV109, a pneumatic angle seat valve PV110, a one-way valve V105, an internal thread ball valve V106, and a dust filter F101. One end of the first nitrogen outlet pipe 21 is connected to the outlet of adsorber A 2, and one end of the second nitrogen outlet pipe 22 is connected to the outlet of adsorber B 3. The other ends of the first nitrogen outlet pipe 21 and the second nitrogen outlet pipe 22 merge and connect to the manifold 27. The other end of the manifold 27 is connected to the inlet of the nitrogen process tank 1. The pneumatic angle seat valve PV109 is located at the first... On the nitrogen outlet pipe 21, the pneumatic angle seat valve PV110 is installed on the second nitrogen outlet pipe 22. The dust filter F101 is installed on the manifold 27. The one-way valve V105 is connected in parallel to both ends of the dust filter F101 through a pipeline, and the gas flow direction of the one-way valve V105 is opposite to the flow direction inside the dust filter F101. The gas pressure inside the dust filter F101 can be adjusted by the one-way valve V105, and gas backflow can be avoided. The bottom of the dust filter F101 is provided with a drain port, and the drain port is connected to the first drain pipe 29. The internal thread ball valve V106 is installed on the first drain pipe 29.

[0037] During the initial nitrogen generation phase and when switching adsorbers, the adsorbers contain air. Therefore, to ensure the nitrogen concentration in the adsorbers quickly reaches the required level after switching, a flushing assembly is included. This assembly comprises a flushing pipe 25 and an internally threaded ball valve V104. The flushing pipe 25 is connected in parallel between the first nitrogen outlet pipe 21 and the second nitrogen outlet pipe 22. The internally threaded ball valve V104 is mounted on the flushing pipe 25 to control its connection and disconnection. When switching from adsorber A 2 to adsorber B 3, after the gas pressure is balanced, the internally threaded ball valve V104 is opened, while the pneumatic angle seat valves PV109 and PV108 are closed, allowing the nitrogen generated in adsorber A 2 to directly enter adsorber B 3 for cleaning. The principle is the same when switching from adsorber B back to adsorber A 2.

[0038] The gas supply assembly includes a gas supply pipe 28, a digital flow switch FT101, a pressure transmitter PT101, a sterilizing filter F102, an internal thread ball valve V110, an internal thread ball valve V111, an internal thread ball valve V112, and a pneumatic angle seat valve PV111. One end of the gas supply pipe 28 is connected to the outlet of the nitrogen process tank 1, and the other end is connected to the pure nitrogen outlet 10. The digital flow switch FT101, the pneumatic angle seat valve PV111, the internal thread ball valve V111, and the sterilizing filter F102 are arranged sequentially along the gas flow direction. The gas supply pipe 28 is used to sterilize the output nitrogen gas, which can be used as a nitrogen source for food. The bottom of the sterilization filter F102 is provided with a drain port, and a third drain pipe 33 is connected to the drain port. The internal thread ball valve V112 is installed on the third drain pipe 33 and is used to control the opening and closing of the third drain pipe 33. The pressure transmitter PT101 is connected to the gas supply pipe 28 between the digital flow switch FT101 and the pneumatic angle seat valve PV111 through a pipeline, and the internal thread ball valve V110 is installed on this pipeline.

[0039] Nitrogen gas with high impurity content and insufficient purity is unacceptable for use. Therefore, during initial nitrogen production or when the nitrogen purity is insufficient, the generated gas needs to be vented. This venting assembly includes a first silencer 6, a second silencer 7, a first vent pipe 30, a second vent pipe 31, a third vent pipe 32, pneumatic angle seat valves PV104, PV105, and PV112, and an internally threaded shut-off valve V113. The first vent pipe 30 is connected at one end to the first inlet pipe 19 and at the other end to the first silencer 6 and the second silencer 7. The pneumatic angle seat valves PV104, PV105, and PV112... A third vent pipe 32 is positioned at the connection between the first vent pipe 30 and the first intake pipe 19. One end of the second vent pipe 31 is connected to the second intake pipe 20, and the other end is connected to the first silencer 6 and the second silencer 7. A pneumatic angle seat valve PV105 is positioned at the connection between the second vent pipe 31 and the second intake pipe 20. One end of the third vent pipe 32 is connected to the air supply pipe 28 between the digital flow switch FT101 and the pneumatic angle seat valve PV111, and the other end is connected to the first silencer 6 and the second silencer 7. A pneumatic angle seat valve PV112 and an internally threaded shut-off valve V113 are sequentially positioned on the third vent pipe 32 along the airflow direction. During venting, the use of two silencers effectively reduces noise.

[0040] When generator A is being cleaned or after nitrogen production is stopped, the gas inside generator A is vented through the first vent pipe 30, the first silencer 6, and the second silencer 7, reducing its internal pressure to normal. When generator B is being cleaned or after nitrogen production is stopped, the gas inside generator B is vented through the second vent pipe 31, the first silencer 6, and the second silencer 7, reducing its internal pressure to normal. When the nitrogen output from nitrogen process tank 1 does not meet the purity requirements, the third vent pipe 32 connects to the first silencer 6 and the second silencer 7 to vent the gas output from nitrogen process tank 1, preventing it from being delivered to users and affecting their use.

[0041] To monitor the output nitrogen concentration and purity, a sampling assembly is also included. The sampling assembly includes a sampling tube 9, an internally threaded ball valve V108, a sampling pressure reducing valve V109, an oxygen transmitter 11, and a dew point transmitter 12. One end of the sampling tube 9 is connected to the gas supply pipe 28 near the outlet of the nitrogen process tank 1, and the other end is connected to the sampling pressure reducing valve V109. The outlet of the sampling pressure reducing valve V109 is divided into two paths, which are connected to the oxygen transmitter 11 and the dew point transmitter 12 respectively, for detecting the oxygen content and water content in the nitrogen. The internally threaded ball valve V108 is installed on the sampling tube 9 to control the opening and closing of the sampling tube 9.

[0042] like Figure 1 and Figure 3 As shown, the control system 8 includes an electrical box 17, on which a touch screen 16 is mounted. Above the touch screen 16, a blue screen paperless recorder 14 is mounted on the electrical box 17. Above the blue screen paperless recorder 14, three pressure gauges 15 are arranged side by side on the electrical box 17. The three pressure gauges 15 are PG101, PG102, and PG103, respectively. Pressure gauge PG101 is connected to the first nitrogen outlet pipe 21 to detect the pressure at the outlet of adsorber A 2, pressure gauge PG102 is connected to the second nitrogen outlet pipe 22 to detect the pressure at the outlet of adsorber B 3, and pressure gauge PG103 is connected to the manifold 27 to detect the pressure entering the nitrogen process tank 1.

[0043] The working principles and connection relationships of other structures can be found in the utility model patent application number 202421808976.7 entitled "A Small Nitrogen Generator", which will not be elaborated here.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A field nitrogen generator, characterized in that: It includes a nitrogen process tank, an A adsorber, and a B adsorber arranged side by side on a base. A control system is provided on the base between the A adsorber and the B adsorber. The control system is used to control the start-up, shutdown, operation, and display of the nitrogen generation equipment. A pressure balancing assembly is provided between adsorber A and adsorber B. The pressure balancing assembly includes an upper pressure equalizing pipe, a middle pressure equalizing pipe, a pneumatic angle seat valve PV106, a pneumatic angle seat valve PV107, and a pneumatic angle seat valve PV108. A first nitrogen outlet pipe is provided at the outlet of adsorber A, and a second nitrogen outlet pipe is provided at the outlet of adsorber B. The upper pressure equalizing pipe is connected in parallel between the first and second nitrogen outlet pipes, and the pneumatic angle seat valve PV108 is installed on the upper pressure equalizing pipe. The middle pressure equalizing pipe is located in the middle position between adsorber A and adsorber B, with one end connected to adsorber A and the other end connected to adsorber B. The pneumatic angle seat valves PV106 and PV107 are installed on the middle pressure equalizing pipe, and the middle pressure equalizing pipe between the pneumatic angle seat valves PV106 and PV107 is connected to the main air inlet pipe through a lower pressure equalizing pipe. The inlets of the A and B adsorbers are connected to a gas source via an inlet assembly, and their outlets are connected to a nitrogen process tank via an outlet assembly. The outlet of the nitrogen process tank is connected to a gas supply assembly, which provides nitrogen gas.

2. The on-site nitrogen generator as described in claim 1, characterized in that: The air intake assembly includes a main air intake pipe, a first air intake pipe, a second air intake pipe, an internal thread shut-off valve V101, a pneumatic angle seat valve PV101, a pneumatic angle seat valve PV102, and a pneumatic angle seat valve PV103. One end of the main air intake pipe has an air intake port, and the other end is divided into two paths, connecting to the first air intake pipe and the second air intake pipe respectively. The other end of the first air intake pipe is connected to adsorber A, and the other end of the second air intake pipe is connected to adsorber B. The internal thread shut-off valve V101 and the pneumatic angle seat valve PV101 are mounted on the main air intake pipe, the pneumatic angle seat valve PV102 is mounted on the first air intake pipe, and the pneumatic angle seat valve PV103 is mounted on the second air intake pipe. A detection pipeline is also provided on the main air inlet pipe between the internal thread shut-off valve V101 and the pneumatic angle seat valve PV101. The detection pipeline is equipped with an internal thread shut-off valve V101 and an air source pressure reducing valve V103. The control terminals of the air source pressure reducing valve V103, pneumatic angle seat valve PV101, pneumatic angle seat valve PV102, and pneumatic angle seat valve PV103 are all connected to the control system through the drive air source pipeline.

3. The on-site nitrogen generator as described in claim 1, characterized in that: The gas outlet assembly includes a first nitrogen outlet pipe, a second nitrogen outlet pipe, a manifold, a pneumatic angle seat valve PV109, a pneumatic angle seat valve PV110, a one-way valve V105, an internal thread ball valve V106, and a dust filter F101. One end of the first nitrogen outlet pipe is connected to the outlet of adsorber A, and one end of the second nitrogen outlet pipe is connected to the outlet of adsorber B. The other ends of the first and second nitrogen outlet pipes merge and connect to the manifold, and the other end of the manifold is connected to the inlet of the nitrogen process tank. Angle seat valve PV109 is installed on the first nitrogen outlet pipe, pneumatic angle seat valve PV110 is installed on the second nitrogen outlet pipe, dust filter F101 is installed on the manifold, and one-way valve V105 is connected in parallel to both ends of dust filter F101 through a pipeline, with the gas flow direction of one-way valve V105 being opposite to the flow direction inside dust filter F101; the bottom of dust filter F101 is provided with a drain port, and a first drain pipe is connected to the drain port, with internal thread ball valve V106 installed on the first drain pipe.

4. The on-site nitrogen generator as described in claim 1, characterized in that: It also includes a flushing assembly, which includes a flushing pipe and an internally threaded ball valve V104. The flushing pipe is connected in parallel between the first nitrogen outlet pipe and the second nitrogen outlet pipe. The internally threaded ball valve V104 is installed on the flushing pipe to control the connection and disconnection of the flushing pipe.

5. The on-site nitrogen generator as described in claim 1, characterized in that: The gas supply assembly includes a gas supply pipe, a digital flow switch FT101, a pressure transmitter PT101, a sterilizing filter F102, an internal thread ball valve V110, an internal thread ball valve V111, an internal thread ball valve V112, and a pneumatic angle seat valve PV111. One end of the gas supply pipe is connected to the outlet of the nitrogen process tank, and the other end is connected to the pure nitrogen outlet. The digital flow switch FT101, the pneumatic angle seat valve PV111, the internal thread ball valve V111, and the sterilizing filter F102 are sequentially arranged on the gas supply pipe along the airflow direction. The bottom of the sterilizing filter F102 has a drain port, and a third drain pipe is connected to the drain port. The internal thread ball valve V112 is located on the third drain pipe. The pressure transmitter PT101 is connected to the gas supply pipe between the digital flow switch FT101 and the pneumatic angle seat valve PV111 via a pipeline, and the internal thread ball valve V110 is located on this pipeline.

6. The on-site nitrogen generator as described in claim 1, characterized in that: It also includes a venting assembly, which includes a first silencer, a second silencer, a first vent pipe, a second vent pipe, a third vent pipe, a pneumatic angle seat valve PV104, a pneumatic angle seat valve PV105, a pneumatic angle seat valve PV112, and an internal thread shut-off valve V113. The first vent pipe is connected at one end to a first air inlet pipe and at the other end to the first and second silencers. The pneumatic angle seat valve PV104 is located at the connection between the first vent pipe and the first air inlet pipe. The second vent pipe is connected at one end to a second air inlet pipe and at the other end to the first and second silencers. The pneumatic angle seat valve PV105 is located at the connection between the second vent pipe and the second air inlet pipe. The third vent pipe is connected at one end to the air supply pipe between the digital flow switch FT101 and the pneumatic angle seat valve PV111, and at the other end to the first and second silencers. The pneumatic angle seat valve PV112 and the internal thread shut-off valve V113 are sequentially arranged on the third vent pipe along the airflow direction.

7. The on-site nitrogen generator as described in claim 1, characterized in that: It also includes a sampling assembly, which includes a sampling tube, an internally threaded ball valve V108, a sampling pressure reducing valve V109, an oxygen transmitter, and a dew point transmitter. One end of the sampling tube is connected to the gas supply pipe near the outlet of the nitrogen process tank, and the other end is connected to the sampling pressure reducing valve V109. The outlet of the sampling pressure reducing valve V109 is divided into two paths, which are respectively connected to the oxygen transmitter and the dew point transmitter. The internally threaded ball valve V108 is installed on the sampling tube and is used to control the on / off state of the sampling tube.

8. The on-site nitrogen generator as described in claim 1, characterized in that: The bottom of the nitrogen process tank is also provided with a drain port, and a second drain pipe is connected to the drain port. The second drain pipe is provided with an internal threaded ball valve V107.

9. The on-site nitrogen generator as described in claim 1, characterized in that: The control system includes an electrical box, on which a touch screen is installed. Above the touch screen, on the electrical box, is a blue screen paperless recorder. Above the blue screen paperless recorder, on the electrical box, are three pressure gauges arranged side by side.

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