Built-in pressure swing adsorption nitrogen injection oxygen control fireproof device

Abstract

The invention discloses a built-in pressure swing adsorption nitrogen injection oxygen control fireproof device, which relates to the technical field of nitrogen injection oxygen control fire prevention, and comprises a cabinet, an air compressor, a first adsorption tower, a second adsorption tower and a filter assembly, the air compressor is arranged at the lower part in the cabinet and is used for consuming and compressing air in the protection area; the first adsorption tower and the second adsorption tower are arranged at the upper part in the cabinet and are used for separating oxygen and nitrogen in compressed air obtained by the air compressor; the filtering assembly is arranged on the upper portion in the machine cabinet and used for filtering compressed air and nitrogen obtained through separation. The built-in pressure swing adsorption nitrogen injection and oxygen control fireproof device is small in size, high in integration level and low in operation energy consumption, can be directly placed in a protection area, utilizes internal air to generate nitrogen to control the oxygen content in the protection area, improves the nitrogen injection and oxygen control efficiency, does not need to build an equipment room, reduces laying of nitrogen injection pipelines, and reduces the system manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of nitrogen injection, oxygen control and fire prevention, and in particular to a built-in pressure swing adsorption nitrogen injection, oxygen control and fire prevention device. Background Art

[0002] Living in the information age, no matter what industry you are in, you need a data center. Therefore, how to protect the data room efficiently and conveniently is a question worth studying. In addition to electronic equipment, the data room does not seem to have any fire source or flammable materials. However, among all kinds of accidents that occur in data rooms, fire accidents account for about 80%, and the damage caused by fire accidents to data rooms is catastrophic. Fires in data rooms will not only cause huge economic losses, but also seriously affect the life and work order of society.

[0003] There are many electrical devices and complex power supply lines in the data room. The equipment in the room generates a lot of heat. During continuous operation, it is very easy for insulation performance to degrade, resulting in short circuits and grounding, which can cause fires. Fires in the room often start in electrical facilities, inside equipment, or inside transmission cable bridges, inside suspended ceilings, and under anti-static floors. General daily inspections do not include checking these locations one by one, and the detection time of smoke and temperature sensors has a certain lag, so electrical fires are not easy to detect in the early stages. Once a fire occurs, the fire will spread rapidly along the cables and network cables placed in bundles under the push of the air conditioning return air flow.

[0004] At present, the main means of protection against fires in data centers is to install clean gas fire extinguishing systems or water sprinkler fire extinguishing systems in the data center. The characteristics of these protection measures are that they need to cooperate with the fire detection system to extinguish the fire after the fire occurs, which often has a certain lag and cannot control the fire in the early stage, and cannot fundamentally suppress the occurrence of fire.

[0005] Nitrogen injection and oxygen control fire prevention is a new type of protection technology that has emerged at home and abroad in recent years. Its working principle is: by injecting nitrogen into the protection area, the oxygen concentration in the protection area is controlled, so that the protection area is in a normal pressure and low oxygen environment to prevent fire.

[0006] The nitrogen injection and oxygen control fire prevention device is the core equipment of the nitrogen injection and oxygen control fire prevention system. It is generally placed in a special equipment room outside the protection area. It consumes and compresses air to produce nitrogen through the membrane separation component, and then delivers the nitrogen into the protection area through the laying of pipelines and nozzles. Compared with nitrogen production by pressure swing adsorption, the principle and structure of membrane separation nitrogen production are relatively simple, but the air utilization rate is low and the operating energy consumption is high. Therefore, this type of nitrogen injection and oxygen control fire prevention device is relatively large in size, and a large number of pipelines and nozzles need to be laid from the equipment room to the protection area, and the system cost is high. Therefore, there are still shortcomings and deficiencies in the prior art. Summary of the invention

[0007] The purpose of the present invention is to provide a built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device that can be directly installed inside a protection area, solving technical problems such as large device size, high energy consumption, and the need to lay a large number of pipelines and nozzles.

[0008] To achieve the above object, the present invention provides a built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device, comprising:

[0009] Cabinets;

[0010] An air compressor, arranged in the lower part of the cabinet, for consuming and compressing the air in the protection area;

[0011] A first adsorption tower and a second adsorption tower are arranged in the upper part of the cabinet, and the first adsorption tower and the second adsorption tower are used to separate oxygen and nitrogen in the compressed air obtained by the air compressor;

[0012] A filter assembly is arranged in the upper part of the cabinet, close to the first adsorption tower and the second adsorption tower. The filter assembly is used to filter the compressed air obtained by the air compressor and the nitrogen separated by the first adsorption tower and the second adsorption tower.

[0013] Preferably, the filter assembly comprises:

[0014] A steam-water separator connected to the air compressor via a pipeline;

[0015] A primary filter connected to the steam-water separator through a pipeline;

[0016] Secondary filter;

[0017] A third-stage filter connected to the second-stage filter through a pipeline;

[0018] Four-stage filter;

[0019] Wherein, the steam-water separator, the primary filter, the secondary filter and the tertiary filter are used to filter compressed air, and the quaternary filter is used to filter nitrogen.

[0020] Preferably, a cold dryer is further provided in the lower part of the cabinet, and the cold dryer is located on one side of the air compressor. The inlet of the cold dryer is connected to the primary filter through a pipeline, and the outlet of the cold dryer is connected to the secondary filter through a pipeline.

[0021] Preferably, it also includes:

[0022] An air buffer tank is arranged in the upper part of the cabinet, the inlet of the air buffer tank is connected to the three-stage filter through a pipeline, and the outlet of the air buffer tank is connected to the first adsorption tower and the second adsorption tower through a pipeline;

[0023] A nitrogen buffer tank is arranged in the upper part of the cabinet, an inlet of the nitrogen buffer tank is connected to the first adsorption tower and the second adsorption tower through a pipeline, and an outlet of the nitrogen buffer tank is connected to the four-stage filter through a pipeline.

[0024] Preferably, the cabinet is provided with a nitrogen exhaust port, the nitrogen exhaust port is connected to the four-stage filter through a pipeline, and the nitrogen exhaust port is used to discharge the separated nitrogen into the protection area.

[0025] Preferably, the cabinet is provided with an oxygen exhaust port, the oxygen exhaust port is connected with the first adsorption tower and the second adsorption tower through a pipeline, and the oxygen exhaust port is used to discharge the separated oxygen outside the protection area.

[0026] Preferably, a flow meter is provided in the pipeline between the nitrogen outlet and the four-stage filter for monitoring the flow rate of the output nitrogen.

[0027] Preferably, the cabinet is provided with a waste liquid outlet, and the waste liquid outlet is connected to the steam-water separator, the primary filter, the secondary filter, the tertiary filter, the quaternary filter and the air buffer tank, and the waste liquid outlet is used to discharge waste liquid.

[0028] Preferably, a pressure gauge group is provided outside the cabinet for monitoring the real-time pressure of the nitrogen buffer tank, the first adsorption tower, the second adsorption tower and the air buffer tank.

[0029] Preferably, the cabinet is further provided with:

[0030] A touch screen installed on a door of the cabinet;

[0031] Heat dissipation fans are installed on both sides of the cabinet for heat dissipation;

[0032] Lifting rings are installed at the four corners of the top of the cabinet;

[0033] The power distribution board is located inside the cabinet and is arranged close to the cabinet door of the cabinet.

[0034] Compared with the above-mentioned background technology, the built-in pressure swing adsorption nitrogen injection and oxygen control fire prevention device provided by the present invention has an air compressor, a first adsorption tower, a second adsorption tower and a filter assembly integrated inside the cabinet, so that the built-in pressure swing adsorption nitrogen injection and oxygen control fire prevention device has a compact structure and a small size, so it can be directly placed in the protection area, and the prepared nitrogen can be directly released into the protection area, without the need to build an equipment room, reducing the laying of nitrogen injection pipelines and nozzles, thereby reducing the system cost. Moreover, the pressure swing adsorption nitrogen injection and oxygen control fire prevention device uses a built-in air compressor to consume the low-oxygen air in the protection area to generate nitrogen, and does not need to be connected to compressed air from the outside. The nitrogen production process adopts the principle of pressure swing adsorption, and the air utilization rate is better than membrane separation, the operating energy consumption is low, and the nitrogen production efficiency is much higher than the existing technical solution, which shortens the nitrogen injection time, reduces the nitrogen consumption, saves energy and reduces consumption, and improves the nitrogen injection and oxygen control efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of a built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device provided in an embodiment of the present invention;

[0037] Figure 2 A schematic structural diagram of another perspective of the built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the internal structure of a built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device provided in an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of the internal structure of the built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device provided in an embodiment of the present invention from another perspective;

[0040] Figure 5 This is a process principle diagram of a built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device provided in an embodiment of the present invention.

[0041] Figures 1 to 5The accompanying drawings are denoted by the following symbols: 1. cooling fan; 2. touch screen; 3. lifting ring; 4. air compressor; 5. cold dryer; 6. distribution board; 7. pressure gauge group; 8. nitrogen outlet; 9. third-stage filter; 10. second-stage filter; 11. first-stage filter; 12. steam-water separator; 13. fourth-stage filter; 14. flow meter; 15. cabinet; 16. nitrogen buffer tank; 17. first adsorption tower; 18. second adsorption tower; 19. air buffer tank; 20. drain valve; 21. waste liquid outlet; 22. oxygen outlet. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] The present invention provides a built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device, which has the characteristics of small size, high nitrogen production efficiency, high integration, energy saving and environmental protection, and convenient construction. Due to its small size and high integration, it can be directly placed in the protection area without building an equipment room, reducing the laying of nitrogen injection pipelines and nozzles, thereby reducing the system cost.

[0045] Please refer to Figures 1 to 5 The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device provided by the present invention includes a cabinet 15, an air compressor 4, a first adsorption tower 17, a second adsorption tower 18 and a filter assembly; the air compressor 4 is arranged at the lower part of the cabinet 15, and the air compressor 4 is used to consume and compress the air in the protection area; the first adsorption tower 17 and the second adsorption tower 18 are arranged at the upper part of the cabinet 15, and the first adsorption tower 17 and the second adsorption tower 18 are used to separate oxygen and nitrogen in the compressed air obtained by the air compressor 4; the filter assembly is arranged at the upper part of the cabinet 15, close to the first adsorption tower 17 and the second adsorption tower 18, and the filter assembly is used to filter the compressed air obtained by the air compressor 4, and filter the nitrogen separated by the first adsorption tower 17 and the second adsorption tower 18.

[0046] The air compressor 4 consumes the air in the protection zone and compresses it to obtain compressed air. The filter assembly filters the compressed air to filter out water, particulate matter, oil, etc. in the compressed air. The filtered compressed air alternately enters the first adsorption tower 17 and the second adsorption tower 18. The first adsorption tower 17 and the second adsorption tower 18 process the compressed air. The first adsorption tower 17 and the second adsorption tower 18 alternately perform adsorption and desorption processes to achieve separation of oxygen and nitrogen in the compressed air, thereby preparing nitrogen. The air compressor 4, the first adsorption tower 17, the second adsorption tower 18 and the filter assembly are integrated inside the cabinet 15, so that the built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device has a compact structure and a small size, so it can be directly placed in the protection zone. The prepared nitrogen directly enters the protection zone, and there is no need to build an equipment room, which reduces the laying of nitrogen injection pipelines, thereby reducing construction costs. Moreover, the built-in pressure swing adsorption nitrogen injection and oxygen control fire prevention device uses the air compressor 4 to consume the air in the protection area to generate nitrogen, and does not need to be connected to the compressed air from the outside. The air consumed in the nitrogen production process comes from the protection area, which shortens the nitrogen injection time and improves the nitrogen injection and oxygen control efficiency.

[0047] Please refer to Figures 1 to 5 The filter assembly includes a steam-water separator 12, a primary filter 11, a secondary filter 10, a tertiary filter 9 and a quaternary filter 13; the steam-water separator 12 is connected to the air compressor 4 through a pipeline; the primary filter 11 is connected to the steam-water separator 12 through a pipeline; the tertiary filter 9 is connected to the secondary filter 10 through a pipeline; wherein the steam-water separator 12, the primary filter 11, the secondary filter 10 and the tertiary filter 9 are used to filter the compressed air, and the quaternary filter 13 is used to filter the nitrogen.

[0048] The water-gas separator 12, the primary filter 11, the secondary filter 10 and the tertiary filter 9 filter the compressed air obtained by the air compressor 4, wherein the liquid water and larger particles in the compressed air are removed when the compressed air passes through the water-gas separator 12 and the primary filter 11, and then the compressed air passes through the secondary filter 10 and the tertiary filter 9 to filter out the particles and oil in the compressed air. Through the above treatment, the cleanliness of the compressed air is improved, so that the compressed air meets the adsorption requirements of the adsorbent in the first adsorption tower 17 and the second adsorption tower 18. The quaternary filter 13 filters the nitrogen separated by the first adsorption tower 17 and the second adsorption tower 18, and filters out the dust brought out of the first adsorption tower 17 and the second adsorption tower 18 by the produced nitrogen, so as to avoid dust pollution of the electrical equipment in the protection area and improve the cleanliness of the output nitrogen.

[0049] Please refer to Figures 1 to 5A cold dryer 5 is also provided in the lower part of the cabinet 15. The cold dryer 5 is located on one side of the air compressor 4. The inlet of the cold dryer 5 is connected to the primary filter 11 through a pipeline, and the outlet of the cold dryer 5 is connected to the secondary filter 10 through a pipeline. The cold dryer 5 and the air compressor 4 are installed together at the lower part of the cabinet 15. The compressed air compressed by the air compressor 4 is first filtered through the steam-water separator 12 and the primary filter 11, and then enters the cold dryer 5 through the pipeline from the primary filter 11. The cold dryer 5 cools and removes water from the compressed air, and then enters the secondary filter 10 from the cold dryer 5 for subsequent filtering.

[0050] Please refer to Figures 1 to 5 The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device provided by the present invention also includes an air buffer tank 19 and a nitrogen buffer tank 16; the air buffer tank 19 is arranged at the upper inner part of the cabinet 15, the inlet of the air buffer tank 19 is connected to the third-level filter 9 through a pipeline, and the outlet of the air buffer tank 19 is connected to the first adsorption tower 17 and the second adsorption tower 18 through a pipeline; the nitrogen buffer tank 16 is arranged at the upper inner part of the cabinet 15, the inlet of the nitrogen buffer tank 16 is connected to the first adsorption tower 17 and the second adsorption tower 18 through a pipeline, and the outlet of the nitrogen buffer tank 16 is connected to the fourth-level filter 13 through a pipeline.

[0051] After passing through the secondary filter 10 and the tertiary filter 9 in turn to filter out particulate matter and oil in the compressed air, the compressed air enters the air buffer tank 19, and the pressure of the compressed air is buffered by the air buffer tank 19. Subsequently, the compressed air alternately enters the first adsorption tower 17 and the second adsorption tower 18 through the pipeline from the air buffer tank 19. The first adsorption tower 17 and the second adsorption tower 18 alternately perform adsorption and desorption processes to achieve the separation of oxygen and nitrogen in the compressed air. The obtained oxygen can be discharged outside the protection area, and the obtained nitrogen enters the nitrogen buffer tank 16. The pressure of the nitrogen is buffered by the nitrogen buffer tank 16. Then, the nitrogen enters the fourth filter 13 for filtration treatment to filter out the dust brought out from the first adsorption tower 17 and the second adsorption tower 18, and then it can be discharged into the protection area.

[0052] By providing the air buffer tank 19 and the nitrogen buffer tank 16, the gas pressure is buffered to protect the equipment from damage.

[0053] Please refer to Figures 1 to 5 The cabinet 15 is provided with a nitrogen outlet 8, which is connected to the four-stage filter 13 through a pipeline. The nitrogen outlet 8 is used to discharge the separated nitrogen into the protection area. In this embodiment, the nitrogen outlet 8 is located at the upper part of the cabinet 15. After the four-stage filter 13 filters out the dust brought out of the produced nitrogen from the first adsorption tower 17 and the second adsorption tower 18, the clean nitrogen can be discharged into the protection area through the nitrogen outlet 8, thereby controlling the oxygen concentration in the protection area, making the protection area in a normal pressure low oxygen environment, and preventing fire.

[0054] Please refer to Figures 1 to 5 The cabinet 15 is provided with an oxygen outlet 22, which is connected to the first adsorption tower 17 and the second adsorption tower 18 through a pipeline, and the oxygen outlet 22 is used to discharge the separated oxygen outside the protection area. In this embodiment, the oxygen outlet 22 is located at the lower part of the cabinet 15, and the first adsorption tower 17 and the second adsorption tower 18 discharge the oxygen separated from the compressed air through the oxygen outlet 22, and the oxygen needs to be discharged into the atmosphere outside the protection area.

[0055] Please refer to Figures 1 to 5 A flow meter 14 is provided on the pipeline between the nitrogen outlet 8 and the four-stage filter 13 for monitoring the flow rate of the output nitrogen. By monitoring the flow rate of the output nitrogen, an appropriate number of built-in pressure swing adsorption nitrogen injection oxygen control fire prevention devices can be selected according to the volume of the actual protection area and installed in the protection area, which can effectively prevent fires in the protection area.

[0056] Please refer to Figures 1 to 5 The cabinet 15 is provided with a waste liquid outlet 21, which is connected to the steam-water separator 12, the primary filter 11, the secondary filter 10, the tertiary filter 9, the quaternary filter 13 and the air buffer tank 19, and the waste liquid outlet 21 is used to discharge waste liquid. The waste liquid outlets of the steam-water separator 12, the primary filter 11, the secondary filter 10, the tertiary filter 9, the quaternary filter 13 and the air buffer tank 19 are connected in series through a PU hose, and the hose connected in series is connected to the waste liquid outlet 21, and the waste liquid is discharged through the waste liquid outlet 21. Among them, the hose connected in series can be installed with a drain valve 20, and the discharge of the waste liquid is controlled by the drain valve 20.

[0057] In addition, the waste liquid outlet 21 and the oxygen outlet 22 are located on the same side of the lower part of the cabinet, which is convenient for unified construction of wiring and piping.

[0058] Please refer to Figures 1 to 5 A pressure gauge group 7 is provided outside the cabinet 15 to monitor the real-time pressure of the nitrogen buffer tank 16, the first adsorption tower 17, the second adsorption tower 18 and the air buffer tank 19. The pressure gauge group 7 is located at the upper outer side of the cabinet 15. The pressure gauge group 7 includes four pressure gauges, which respectively monitor the real-time pressures of the nitrogen buffer tank 16, the first adsorption tower 17, the second adsorption tower 18 and the air buffer tank 19.

[0059] Please refer to Figures 1 to 5In the pressure swing adsorption nitrogen injection oxygen control fire prevention device provided by the present invention, the cabinet 15 is also provided with a touch screen 2, a heat dissipation fan 1, a hanging ring 3 and a distribution board 6; the touch screen 2 is installed on the cabinet door of the cabinet 15, and the touch screen 2 is used to control the operation of the pressure swing adsorption nitrogen injection oxygen control fire prevention device; the heat dissipation fan 1 is installed on both sides of the cabinet 15, and the heat dissipation fan 1 is used for heat dissipation; the hanging ring 3 is installed at the top four corners of the cabinet 15, so that the cabinet 15 can be moved and installed conveniently through the hanging ring 3; the distribution board 6 is located inside the cabinet 15, the distribution board 6 is arranged close to the cabinet door, and the control circuit and components are installed on the distribution board 6.

[0060] The cabinet door is located at the front of the cabinet 15, and is hingedly connected to the cabinet 15. The cabinet door is a single-opening cabinet door, and the distribution board 6 is arranged close to the cabinet door, so that the cabinet door can be opened for quick maintenance and debugging.

[0061] Optionally, the cabinet 15 has an outer dimension of 800*800*2000mm, and the built-in pressure swing adsorption nitrogen injection and oxygen control fire prevention device can generate at least 10m³ nitrogen per hour, and can be used for nitrogen injection and oxygen control in a protection area not larger than 350m³.

[0062] The built-in pressure swing adsorption nitrogen injection and oxygen control fire prevention device provided by the present invention has a cold dryer 5 and an air compressor 4 located at the lower part of the cabinet 15, and a first adsorption tower 17, a second adsorption tower 18, an air buffer tank 19, a nitrogen buffer tank 16 and a filter assembly integrated at the upper part of the cabinet 15, and a mirror-like arrangement is adopted, so that the internal structure of the cabinet 15 is compact and small in size, and can be directly placed in the protection area, without the need to build an equipment room, reducing the laying of nitrogen injection pipelines, thereby reducing the system cost. Moreover, the built-in pressure swing adsorption nitrogen injection and oxygen control fire prevention device uses the built-in air compressor 4 to consume the low-oxygen air in the protection area to produce nitrogen, and does not need to be connected to compressed air from the outside. The nitrogen production process adopts the principle of pressure swing adsorption, with high air utilization and low operating energy consumption, shortening the nitrogen injection time and improving the efficiency of nitrogen injection and oxygen control.

[0063] During use, the air compressor 4 produces compressed air, which first passes through the water-steam separator 12 and the primary filter 11 to remove liquid water and larger particles in the compressed air, and then enters the cold dryer 5 for cooling and dehydration, and then passes through the secondary filter 10 and the tertiary filter 9 to filter out particles and oil in the compressed air, and then the compressed air enters the air buffer tank 19, and the pressure of the compressed air is buffered by the air buffer tank 19, and then the compressed air enters the first adsorption tower 17 and the second adsorption tower 18 alternately through the pipeline from the air buffer tank 19, and the first adsorption tower 17 and the second adsorption tower 18 alternately perform adsorption and desorption processes to achieve the separation of oxygen and nitrogen in the compressed air, and the obtained oxygen can be discharged outside the protection area, and the obtained nitrogen enters the nitrogen buffer tank 16, and the pressure of the nitrogen is buffered by the nitrogen buffer tank 16, and finally the nitrogen enters the fourth filter 13 for filtration treatment, and after filtering out the dust brought out from the first adsorption tower 17 and the second adsorption tower 18, it can be discharged into the protection area to prevent the occurrence of fire.

[0064] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0065] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device, characterized in that: include: Cabinets; An air compressor, arranged in the lower part of the cabinet, for consuming and compressing the air in the protection area; A first adsorption tower and a second adsorption tower are arranged in the upper part of the cabinet, and the first adsorption tower and the second adsorption tower are used to separate oxygen and nitrogen in the compressed air obtained by the air compressor; A filter assembly is arranged in the upper part of the cabinet, close to the first adsorption tower and the second adsorption tower. The filter assembly is used to filter the compressed air obtained by the air compressor and the nitrogen separated by the first adsorption tower and the second adsorption tower.

2. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 1 is characterized in that: The filter assembly comprises: A steam-water separator connected to the air compressor via a pipeline; A primary filter connected to the steam-water separator through a pipeline; Secondary filter; A third-stage filter connected to the second-stage filter through a pipeline; Four-stage filter; Wherein, the steam-water separator, the primary filter, the secondary filter and the tertiary filter are used to filter compressed air, and the quaternary filter is used to filter nitrogen.

3. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 2 is characterized in that: A cold dryer is also provided in the lower part of the cabinet. The cold dryer is located on one side of the air compressor. The inlet of the cold dryer is connected to the primary filter through a pipeline, and the outlet of the cold dryer is connected to the secondary filter through a pipeline.

4. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 3 is characterized in that: Also includes: An air buffer tank is arranged in the upper part of the cabinet, the inlet of the air buffer tank is connected to the three-stage filter through a pipeline, and the outlet of the air buffer tank is connected to the first adsorption tower and the second adsorption tower through a pipeline; A nitrogen buffer tank is arranged in the upper part of the cabinet, an inlet of the nitrogen buffer tank is connected to the first adsorption tower and the second adsorption tower through a pipeline, and an outlet of the nitrogen buffer tank is connected to the four-stage filter through a pipeline.

5. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 4 is characterized in that: The cabinet is provided with a nitrogen exhaust port, which is connected to the four-stage filter through a pipeline, and the nitrogen exhaust port is used to discharge the separated nitrogen into the protection area.

6. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 4 is characterized in that: The cabinet is provided with an oxygen exhaust port, which is connected to the first adsorption tower and the second adsorption tower through a pipeline, and is used to discharge the separated oxygen outside the protection area.

7. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 5 is characterized in that: A flow meter is provided on the pipeline between the nitrogen outlet and the four-stage filter for monitoring the flow of the output nitrogen.

8. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 4 is characterized in that: The cabinet is provided with a waste liquid outlet, which is connected with the steam-water separator, the primary filter, the secondary filter, the tertiary filter, the quaternary filter and the air buffer tank, and is used to discharge waste liquid.

9. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to claim 4 is characterized in that: A pressure gauge group is provided outside the cabinet for monitoring the real-time pressure of the nitrogen buffer tank, the first adsorption tower, the second adsorption tower and the air buffer tank.

10. The built-in pressure swing adsorption nitrogen injection oxygen control fire prevention device according to any one of claims 1 to 9, characterized in that: The cabinet also includes: A touch screen installed on a door of the cabinet; Heat dissipation fans are installed on both sides of the cabinet for heat dissipation; Lifting rings are installed at the four corners of the top of the cabinet; The power distribution board is located inside the cabinet and is arranged close to the cabinet door of the cabinet.

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