Small-sized nitrogen-making equipment

Abstract

The utility model provides small nitrogen making equipment which comprises a shell with an opening in the side face and a door plate arranged at the opening of the shell, a control system is arranged on the door plate, and the control system is used for controlling starting, stopping and running of the nitrogen making equipment. A modular nitrogen generator is arranged in the shell, the modular nitrogen generator comprises a first adsorption group, a second adsorption group, a buffer tank and a gas path control valve group, and nitrogen generation is realized through connection and control of the gas path control valve group and a pipeline. The equipment has the characteristics of small volume, energy conservation, high efficiency, high purity, simplicity in maintenance, safety, reliability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen production equipment, in particular to a small nitrogen production equipment. Background Art

[0002] Nitrogen production equipment uses air as raw material and separates oxygen and nitrogen in the air by physical or chemical methods to obtain nitrogen. The nitrogen generators applied in industry can meet various industrial and application requirements.

[0003] The existing nitrogen production equipment includes large nitrogen production equipment and small nitrogen production equipment. The large nitrogen production equipment has high nitrogen production purity, high efficiency and convenient adjustment. However, its volume is relatively large, the cost is generally relatively high, and the maintenance is difficult. For small nitrogen production equipment, although the nitrogen purity can be adjusted within a certain range, due to its relatively simple structure, in occasions with high purity requirements, the output needs to be sacrificed to improve the purity of the generated nitrogen, resulting in low efficiency.

[0004] Therefore, aiming at the problems existing in the existing nitrogen production equipment, it is urgent to provide a small nitrogen production equipment that takes into account both purity and efficiency. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a small nitrogen production equipment.

[0006] The technical solution adopted by the utility model to solve its technical problem is: a small nitrogen production equipment, including a housing with an opening on the side and a door panel arranged at the opening of the housing. The door panel is provided with a control system for controlling the start, stop and operation of the nitrogen production equipment. Inside the housing, there is a modular nitrogen generator, which includes a first adsorption group, a second adsorption group, a buffer tank and a gas path control valve group. Among them, the gas path control valve group includes automatic valves PV102, PV103, PV106 and PV107. The intake end of the first adsorption group is connected to the first intake branch pipeline, and the automatic valve PV102 is arranged on the first intake branch pipeline. The intake end of the second adsorption group is connected to the second intake branch pipeline, and the automatic valve PV103 is arranged on the second intake branch pipeline. Both the first intake branch pipeline and the second intake branch pipeline are connected to the intake main pipeline and are connected to the intake assembly through the intake main pipeline to realize the input of compressed air. Among them, both the automatic valves PV102 and PV103 adopt pneumatically controlled two-way double-acting valves, that is, cylinder valves. PV102 and PV103 cooperate with each other to realize the switching of compressed air entering the first adsorption group and the second adsorption group. The manual shut-off valve V102 is used to adjust the intake volume of compressed air, and the manual shut-off valve V103 is used to adjust the outlet flow rate of nitrogen.

[0007] The outlet end of the first adsorption group is connected to the first outlet branch pipeline, and an automatic valve PV106 is provided on the first outlet branch pipeline. The outlet end of the second adsorption group is connected to the second outlet branch pipeline, and an automatic valve PV107 is provided on the second outlet branch pipeline. The first outlet branch pipeline and the second outlet branch pipeline are both connected to a confluence pipeline and are connected to the inlet end of a buffer tank through the confluence pipeline. The outlet end of the buffer tank is connected to an outlet pipeline. Among them, both the automatic valve PV106 and the automatic valve PV107 adopt pneumatically controlled two-way double-acting valves, that is, cylinder valves. PV106 and PV107 cooperate with each other to switch the nitrogen produced by the first adsorption group and the second adsorption group into the buffer tank.

[0008] Further, the air intake assembly includes an air compressor, a refrigerated dryer, and an air tank. The inlet end of the air compressor is communicated with the air. The outlet end of the air compressor is sequentially connected to the refrigerated dryer and the air tank through pipelines. A filter F101 is provided on the pipeline between the air compressor and the refrigerated dryer. Filters F102 and F103 are provided on the pipeline between the refrigerated dryer and the air tank. The outlet end of the air tank is connected to the inlet end of a modular nitrogen generator through an air intake main pipeline.

[0009] Further, manual stop valves V101 and V102 are provided on the air intake main pipeline between the air tank and the air intake port of the modular nitrogen generator to control the on-off of the air intake. A filter F104 is also provided on the air intake main pipeline between the manual stop valves V101 and V102. The manual stop valves V101 and V102 are used for regulating the intake of compressed air, and the filter F104 is used for filtering the incoming compressed air to remove impurities in the compressed air and avoid affecting the adsorption efficiency of the nitrogen-making agent.

[0010] Further, an air outlet assembly is also included. The air outlet assembly includes a filter F105, a pressure gauge P4, an automatic valve PV109, a manual stop valve V103, and a manual stop valve V105 that are sequentially arranged on the outlet pipeline along the air flow direction. The end of the outlet pipeline is connected to the inlet port of a nitrogen storage tank. The nitrogen storage tank is used for storing the generated nitrogen. An exhaust pipeline is led out from the outlet pipeline between the pressure gauge P4 and the automatic valve PV109. An automatic valve PV110 and a manual valve V104 are arranged on the exhaust pipeline along the air flow direction.

[0011] In the gas outlet assembly, the filter F105 is used to filter the output nitrogen. The pressure gauge P4 measures the pressure of the produced gas, and the working state of the adsorbent in the adsorption assembly can be judged by the pressure. The automatic valve PV109 is used to automatically control the output nitrogen and opens to transport it to the gas-using point when qualified nitrogen is detected. The manual shut-off valve V103 is used to adjust the nitrogen gas outlet flow rate. The automatic valve PV110 and the manual valve V104 cooperate to directly discharge the nitrogen that has not reached the purity at the initial stage of nitrogen production. The automatic valve PV110 is used as the exhaust gas discharge when unqualified nitrogen is detected. Both the automatic valve PV109 and the automatic valve PV110 adopt pilot normally closed two-way valves.

[0012] Further, the gas outlet assembly further includes a flow meter, and the flow meter is arranged on the gas outlet pipeline between the filter F105 and the pressure gauge P4. The flow meter monitors the flow rate, and the change in the nitrogen production can be judged by the flow rate.

[0013] Further, it further includes an analysis assembly. The analysis assembly includes an analysis pipeline, a manual valve V108, a manual valve V107, and an oxygen analyzer. One end of the analysis pipeline is connected to the gas outlet pipeline downstream of the filter F105, and the other end is connected to the air inlet of the oxygen analyzer. The manual valve V108 and the manual valve V107 are arranged on the analysis pipeline along the gas flow direction.

[0014] The manual valve V108 is used to adjust the speed of the oxygen analyzer to detect the nitrogen content, and the manual valve V107 is used to control the on-off of the analysis pipeline. Both the manual valve V108 and V107 adopt manual shut-off valves.

[0015] Further, in order to reduce the noise of the equipment, it further includes a silencing assembly. The silencing assembly includes a silencing pipeline, an automatic valve PV104, an automatic valve PV105, and a silencer SL101. Both ends of the silencing pipeline are connected in parallel to the intake branch pipelines of the first adsorption group and the second adsorption group, and the automatic valve PV104 and the automatic valve PV105 are arranged on the silencing pipeline. The silencer SL101 is connected to the silencing pipeline between the automatic valve PV104 and the automatic valve PV105 through a pipeline. Both the automatic valve PV104 and the automatic valve PV105 adopt pilot normally closed two-way valves and are used to control the discharge of oxygen-rich gas during the regeneration of the first adsorption group and the second adsorption group.

[0016] Further, it further includes a pressure balance assembly. The pressure balance assembly includes an inlet balance pipeline, an outlet balance pipeline, an automatic valve PV111, and an automatic valve PV112. Both ends of the inlet balance pipeline are respectively connected to the pipelines at the inlet ends of the first adsorption group and the second adsorption group, and the automatic valve PV111 is arranged on the inlet balance pipeline; both ends of the outlet balance pipeline are respectively connected to the pipelines at the outlet ends of the first adsorption group and the second adsorption group, and the automatic valve PV112 is arranged on the outlet balance pipeline.

[0017] The automatic valves PV111 and PV112 both adopt pneumatically controlled two-way double-acting valves, that is, cylinder valves, which are used for pressure equalization during the switching of the first adsorption group and the second adsorption group, enabling the adsorption group that needs to work to quickly enter the working state.

[0018] Specifically, the dimensions of the outer shell are length * width * height = 495 * 484 * 752.50, with the unit of mm.

[0019] The beneficial effects of the present utility model are as follows:

[0020] (1) Small size: The small nitrogen generator is designed compactly, occupying a small floor area and being convenient for installation and deployment. This feature enables it to be easily applied in places with limited space, such as laboratories, hospitals, food processing workshops, etc., effectively saving valuable space resources.

[0021] (2) Energy-saving and efficient: Compared with traditional large nitrogen production equipment, the small nitrogen generator has significant advantages in energy consumption. Its high energy utilization rate and advanced energy-saving design enable it to greatly reduce energy consumption when producing the same amount of nitrogen, saving costs for enterprises.

[0022] (3) High purity: The small nitrogen generator adopts advanced separation technology and can effectively separate high-purity nitrogen from the air. This high-purity nitrogen can meet the requirements of many industrial applications with high precision and quality, such as the electronics, semiconductor, medical, and other industries.

[0023] (4) Simple maintenance: The design of the small nitrogen generator makes its maintenance simple and convenient. Its modular design makes each component easy to replace and repair, reducing maintenance costs and time. At the same time, the intelligent control system also makes the operation more convenient, reducing manual intervention.

[0024] (5) Safe and reliable: The small nitrogen generator fully considers safety factors in its design and adopts multiple safety protection measures, such as pressure protection and temperature protection, to ensure the safe and stable operation of the equipment during operation. At the same time, its high-quality components and strict manufacturing processes also ensure the long-term stable operation of the equipment.

[0025] (6) Environmentally friendly and pollution-free: The small nitrogen generator does not produce any harmful substances during operation and fully meets environmental protection requirements. At the same time, due to its energy-saving and efficient characteristics, it also reduces carbon emissions, providing strong support for realizing a green and low-carbon production mode.

[0026] (7) Wide application fields: Due to the many advantages mentioned above, the small nitrogen generator has a very wide range of application fields. In addition to the electronics, semiconductor, medical, and other industries mentioned above, it can also be widely applied in multiple fields such as food packaging, chemical production, tire manufacturing, and metal processing.

[0027] (8) Good long-term benefits: Although the initial investment in small nitrogen generators may be relatively high, due to their advantages such as energy conservation, high efficiency, simple maintenance, safety and reliability, the costs during long-term operation are greatly reduced. At the same time, due to their wide range of application fields, they can also bring more business opportunities and profit growth points to enterprises. Description of the Drawings

[0028] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0029] Figure 1 It is a schematic structural diagram of the small nitrogen production equipment of the present utility model.

[0030] Figure 2 It is a schematic gas circuit diagram of the small nitrogen production equipment of the present utility model.

[0031] Figure 3 It is a schematic diagram of the principle of the intake assembly.

[0032] Figure 4 It is a schematic diagram of the principle of the modular nitrogen generator.

[0033] In the figure: 1. Outer shell, 2. Door panel, 3. Control system, 4. Gas circuit control valve group, 5. Intake main pipeline, 6. First intake branch pipeline, 7. Second intake branch pipeline, 8. Confluence pipeline, 9. Outlet pipeline, 10. Muffler pipeline, 11. Exhaust pipeline, 12. Analysis pipeline, 13. Inlet balance pipeline, 14. Outlet balance pipeline, 15. Roller foot, 16. Air compressor, 17. Refrigerated dryer, 18. Air tank, 19. First adsorption group, 20. Buffer tank, 21. Second adsorption group, 22. Nitrogen storage tank, 23. First outlet branch pipeline, 24. Second outlet branch pipeline, 25. Flowmeter, 26. Oxygen analyzer. Specific Embodiments

[0034] The present utility model will now be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model. Directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0035] Such as Figure 1 - Figure 2As shown in the figure, a small nitrogen production device of the present utility model includes a housing 1 with an opening on the side and a door panel 2 provided at the opening of the housing 1. The bottom of the housing 1 is provided with rolling feet 5 for easy movement, which have a self-locking function and a floor level adjustment function. A control system 3 is provided on the door panel 2, and the control system 3 is used to control the start, stop, and operation of the nitrogen production device. A modular nitrogen generator is provided inside the housing 1, and the modular nitrogen generator includes a first adsorption group 19, a second adsorption group 21, a buffer tank 20, and a gas path control valve group 4. Among them, the gas path control valve group 4 includes manual valves V101, V102, V103, V104, V105, V106, V107, V108; automatic valves PV102, PV103, PV104, PV105, PV106, PV107, PV109, PV110, PV111, PV112.

[0036] As Figure 2 shown, the inlet end of the first adsorption group 19 is connected to the first inlet branch pipeline 6, and an automatic valve PV102 is provided on the first inlet branch pipeline 6. The inlet end of the second adsorption group 21 is connected to the second inlet branch pipeline 7, and an automatic valve PV103 is provided on the second inlet branch pipeline 7. The outlet end of the first adsorption group 19 is connected to the first outlet branch pipeline 23, and an automatic valve PV106 is provided on the first outlet branch pipeline 23. The outlet end of the second adsorption group 21 is connected to the second outlet branch pipeline 24, and an automatic valve PV107 is provided on the second outlet branch pipeline 24. Both the first outlet branch pipeline 23 and the second outlet branch pipeline 24 are connected to the confluence pipeline 8 and are connected to the inlet end of the buffer tank 20 through the confluence pipeline 8. The outlet end of the buffer tank 20 is connected to the outlet pipeline 9. A pressure gauge P2 is provided on the first outlet branch pipeline 23, and a pressure gauge P3 is provided on the second outlet branch pipeline 24, which are respectively used to monitor the gas pressure at the outlet ends of the first adsorption group 19 and the second adsorption group 21.

[0037] As Figure 3 shown, the intake assembly includes an air compressor 16, a refrigerated dryer 17, and an air tank 18. The inlet end of the air compressor 16 is in communication with the air, and the outlet end of the air compressor 16 is sequentially connected to the refrigerated dryer 17 and the air tank 18 through pipelines. A filter F101 is provided on the pipeline between the air compressor 16 and the refrigerated dryer 17. Filters F102 and F103 are provided on the pipeline between the refrigerated dryer 17 and the air tank 18. The outlet end of the air tank 18 is connected to the inlet end of the modular nitrogen generator through the intake main pipeline 5. Manual valves V101 and V102 are provided on the intake main pipeline 5 between the air tank 18 and the intake port of the modular nitrogen generator to control the on-off of the intake air, and a filter F104 is also provided on the intake main pipeline 5 between the manual valves V101 and V102.

[0038] AsFigure 4 As shown, the modular nitrogen generator further includes an air outlet assembly, a noise elimination assembly, an analysis assembly, and a pressure balance assembly. Among them, the air outlet assembly includes a filter F105, a pressure gauge P4, an automatic valve PV109, a manual shut-off valve V103, and a manual shut-off valve V105 that are sequentially arranged on the air outlet pipeline 9 along the air flow direction. The end of the air outlet pipeline 9 is connected to the air inlet of the nitrogen storage tank 22, and the nitrogen storage tank 22 is used to store the generated nitrogen. A manual shut-off valve V106 is provided at the outlet of the nitrogen storage tank 22, and the on-off of the nitrogen output from the nitrogen storage tank 22 is controlled by the manual shut-off valve V106 to supply nitrogen to the nitrogen usage point; an exhaust pipeline 11 is led out from the air outlet pipeline 9 between the pressure gauge P4 and the automatic valve PV109, and an automatic valve PV110 and a manual valve V104 are arranged on the exhaust pipeline 11 along the air flow direction. The air outlet assembly further includes a flow meter 25, and the flow meter 25 is arranged on the air outlet pipeline 9 between the filter F105 and the pressure gauge P4. The flow meter 25 is an optional component. The noise elimination assembly includes a noise elimination pipeline 10, an automatic valve PV104, an automatic valve PV105, and a muffler SL101. The two ends of the noise elimination pipeline 10 are connected in parallel to the intake branch pipelines of the first adsorption group 19 and the second adsorption group 21, and the automatic valve PV104 and the automatic valve PV105 are arranged on the noise elimination pipeline 10. The muffler SL101 is connected to the noise elimination pipeline 10 between the automatic valve PV104 and the automatic valve PV105 through a pipeline. The analysis assembly includes an analysis pipeline 12, a valve V102, a valve V103, and an oxygen analyzer 26. One end of the analysis pipeline 12 is connected to the air outlet pipeline 9 downstream of the filter F105, and the other end is connected to the air inlet of the oxygen analyzer 26. The valve V102 and the valve V103 are arranged on the analysis pipeline 12 along the air flow direction. The pressure balance assembly includes an inlet balance pipeline 13, an outlet balance pipeline 14, an automatic valve PV111, and an automatic valve PV112. The two ends of the inlet balance pipeline 13 are respectively connected to the pipelines at the inlet ends of the first adsorption group 19 and the second adsorption group 21, and the automatic valve PV111 is arranged on the inlet balance pipeline 13; the two ends of the outlet balance pipeline 14 are respectively connected to the pipelines at the outlet ends of the first adsorption group 19 and the second adsorption group 21, and the automatic valve PV112 is arranged on the outlet balance pipeline 14.

[0039] The dimensions of the housing 1 are length * width * height = 495 * 484 * 752.50, with the unit of mm.

[0040] Working principle:

[0041] The air inhaled is compressed by the air compressor 16, cooled and dried by the refrigerated air dryer 17, and the compressed air is filtered for impurities through the filters F101, F102, and F103, so as to obtain clean and dry compressed air and store it in the air tank 18. The above intake assembly pre-treats the air to avoid impurities, moisture, etc. from affecting the subsequent nitrogen production efficiency.

[0042] The compressed air in the air tank 18 is connected to the modular nitrogen generator through the intake main pipeline 5. For the convenience of controlling the on-off of the gas, valves V101 and V102 are set on the intake main pipeline 5 for on-off switching, and a filter F104 is added between the two valves.

[0043] When the first adsorption group 19 is put into use, at this time, PV102 at the intake end is opened, PV103 is closed, and the compressed air enters the first adsorption group 19 through the first intake branch pipeline 6 to start nitrogen production by adsorption; PV106 at the outlet end is opened, PV107 is closed, and the generated nitrogen enters the buffer tank 20. Since air exists in the system when nitrogen is just starting to be generated and its nitrogen purity does not meet the usage requirements, it is discharged as waste gas. At this time, PV110 and V104 are opened, PV109 and V103 are closed, and the gas in the buffer tank 20 is discharged from the waste gas vent through the outlet pipeline 9, filter F105, flowmeter 25, PV110, and V104 in sequence. When the purity meter detects that the purity of the generated nitrogen meets the requirements, PV110 and V104 are closed, and PV109, V103, and V105 are opened to store the generated nitrogen that meets the requirements in the nitrogen storage tank 22. When nitrogen is needed, opening V106 at the outlet of the nitrogen storage tank 22 can deliver the nitrogen to the usage point.

[0044] When it is detected that the nitrogen purity drops, that is, before the adsorption capacity of the first adsorption group 19 drops to the point where it cannot meet the requirements of production volume and purity, the adsorption group is switched.

[0045] When switching from the first adsorption group 19 to the second adsorption group 21 for use, since there is high-pressure nitrogen in the first adsorption group 19 in the initial state and the second adsorption group 21 is in an atmospheric pressure state, in order to quickly put the second adsorption group 21 into use, at this time, PV111 and PV112 are opened for pressure equalization to quickly increase the pressure in the second adsorption group 21. When the pressure in the first adsorption group 19 and the second adsorption group 21 reaches equilibrium, PV111 and PV112 are closed. At this time, PV103 and PV107 are opened, PV102 and PV106 are closed, and the second adsorption group 21 starts to work. The working states of other components are basically the same as when the first adsorption group 19 is put into use.

[0046] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the scope of the present utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A small nitrogen production equipment, characterized in that: It comprises a shell with a side opening and a door panel arranged at the opening of the shell, wherein the door panel is provided with a control system, and the control system is used to control the start, stop and operation of the nitrogen production equipment; a modular nitrogen generator is arranged inside the shell, and the modular nitrogen generator comprises a first adsorption group, a second adsorption group, a buffer tank and a gas circuit control valve group, wherein the gas circuit control valve group comprises automatic valves PV102, PV103, PV106 and PV107; The air inlet end of the first adsorption group is connected to the first air inlet branch pipeline, and the first air inlet branch pipeline is provided with an automatic valve PV102. The air inlet end of the second adsorption group is connected to the second air inlet branch pipeline, and the second air inlet branch pipeline is provided with an automatic valve PV103. The first air inlet branch pipeline and the second air inlet branch pipeline are both connected to the air inlet main pipeline, and are connected to the air inlet assembly through the air inlet main pipeline to realize the input of compressed air; The outlet end of the first adsorption group is connected to the first outlet branch pipeline, and the first outlet branch pipeline is provided with an automatic valve PV106. The outlet end of the second adsorption group is connected to the second outlet branch pipeline, and the second outlet branch pipeline is provided with an automatic valve PV107. The first outlet branch pipeline and the second outlet branch pipeline are both connected to the confluence pipeline, and are connected to the air inlet end of the buffer tank through the confluence pipeline. The outlet end of the buffer tank is connected to the outlet pipeline.

2. The small nitrogen production equipment according to claim 1, characterized in that: The air intake assembly includes an air compressor, a cold dryer and an air tank. The inlet end of the air compressor is connected to the air, and the outlet end of the air compressor is connected to the cold dryer and the air tank in sequence through pipelines. A filter F101 is provided on the pipeline between the air compressor and the cold dryer; filters F102 and F103 are provided on the pipeline between the cold dryer and the air tank, and the outlet end of the air tank is connected to the air intake end of the modular nitrogen generator through an air intake main pipeline.

3. The small nitrogen production equipment according to claim 2, characterized in that: Manual stop valves V101 and V102 are provided on the air intake main line between the air tank and the air inlet of the modular nitrogen generator to control the on and off of the air intake. A filter F104 is also provided on the air intake main line between the manual stop valves V101 and V102.

4. The small nitrogen production equipment according to claim 1, characterized in that: It also includes an air outlet component, which includes a filter F105, a pressure gauge P4, an automatic valve PV109, a manual stop valve V103, and a manual stop valve V105 which are sequentially arranged on the air outlet pipeline along the air flow direction. The end of the air outlet pipeline is connected to the air inlet of a nitrogen storage tank, and the nitrogen storage tank is used to store the generated nitrogen. An exhaust pipeline is led out from the air outlet pipeline between the pressure gauge P4 and the automatic valve PV109, and an automatic valve PV110 and a manual stop valve V104 are arranged on the exhaust pipeline along the air flow direction.

5. The small nitrogen production equipment according to claim 4, characterized in that: The air outlet component also includes a flow meter, which is arranged on the air outlet pipeline between the filter F105 and the pressure gauge P4.

6. The small nitrogen production equipment according to claim 4, characterized in that: It also includes an analysis component, which includes an analysis pipeline, a manual valve V108, a manual valve V107 and an oxygen analyzer. One end of the analysis pipeline is connected to the outlet pipeline downstream of the filter F105, and the other end is connected to the air inlet of the oxygen analyzer. The manual valve V108 and the manual valve V107 are arranged on the analysis pipeline along the air flow direction.

7. The small nitrogen production equipment according to claim 1, characterized in that: It also includes a silencer component, which includes a silencer pipeline, an automatic valve PV104, an automatic valve PV105 and a silencer SL101. Both ends of the silencer pipeline are connected in parallel to the intake branch pipelines of the first adsorption group and the second adsorption group, and the automatic valve PV104 and the automatic valve PV105 are arranged on the silencer pipeline. The silencer SL101 is connected to the silencer pipeline between the automatic valve PV104 and the automatic valve PV105 through a pipeline.

8. The small nitrogen production equipment according to claim 1, characterized in that: It also includes a pressure balancing component, which includes an inlet balancing pipeline, an outlet balancing pipeline, an automatic valve PV111, and an automatic valve PV112. The two ends of the inlet balancing pipeline are respectively connected to the pipelines at the inlet ends of the first adsorption group and the second adsorption group, and the automatic valve PV111 is arranged on the inlet balancing pipeline; the two ends of the outlet balancing pipeline are respectively connected to the pipelines at the outlet ends of the first adsorption group and the second adsorption group, and the automatic valve PV112 is arranged on the outlet balancing pipeline.

9. The small nitrogen production equipment according to claim 1, characterized in that: The dimensions of the shell are length*width*height: 495*484*752.50, in mm.

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