Integrated nitrogen recovery supercharging device

Abstract

The application discloses an integrated nitrogen recovery pressurizing device, which comprises a skid, a pipeline system arranged in the skid and provided with a containing groove in the middle, and a control system arranged in the containing groove; the pipeline system comprises a nitrogen pressurizing module, a diffusion module arranged at the inlet end and the outlet end of the nitrogen pressurizing module, and a driving gas module. The technical problem of low integration, difficult mobile deployment and low recovery efficiency of a traditional low-pressure nitrogen recovery device is solved. The compact internal structure, the combination of the pneumatic drive and the built-in power storage of the control system make the device compact in structure, flexible in movement and capable of being quickly deployed to operation points in various environments; the two parallel pressurizing pumps make the device redundant and alternately used, thereby prolonging the service life of the device while better controlling the nitrogen pressure in the nitrogen cylinder; the universal wheel and the silencer arranged in the device facilitate the movement of the device and reduce the generated noise.

Description

Technical Field

[0001] This application relates to the field of nitrogen recovery technology, specifically to an integrated nitrogen recovery and booster device. Background Technology

[0002] Nitrogen, due to its chemical inertness, is widely used in industrial applications such as liquefied natural gas (LNG) equipment testing (e.g., purging, replacement, and leak testing of refueling equipment and pump skids), nitrogen injection for enhanced oil recovery in oil fields, pipeline purging and emergency response, fire prevention and extinguishing in coal mines, and gas dilution. These applications typically require large quantities of low-pressure nitrogen, and after the operation, this nitrogen is generally released directly into the air, leading to significant waste of nitrogen resources. According to actual operational data, the amount of nitrogen released during testing of a single LNG refueling unit is approximately 2-2.4 kg, while the nitrogen consumption during testing of a single LNG pump skid can reach as high as 20-30 kg. This direct release method makes nitrogen a consumable that is not recycled, resulting in continuous and high material costs.

[0003] Currently, the recovery and reuse of low-pressure nitrogen in the aforementioned scenarios often requires the temporary deployment and assembly of mobile compressors, storage tanks, and corresponding valves and pipelines, creating a decentralized recovery system. This temporary assembly method results in low system integration, redundant components, and extreme inconvenience in relocation and transportation, making it unsuitable for the rapid switching requirements of multiple dispersed testing stations within a factory or site. Furthermore, system start-up, shutdown, operation monitoring, and pressure regulation are highly dependent on manual experience, leading to cumbersome processes, low automation, and difficulty in guaranteeing recovery efficiency and stability.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this disclosure provides an integrated nitrogen recovery and pressurization device, which mainly solves the technical problems of low integration, difficulty in mobile deployment and low recovery efficiency of traditional low-pressure nitrogen recovery devices.

[0006] According to one aspect of this disclosure, an integrated nitrogen recovery and boosting device is provided, comprising a skid, a piping system disposed inside the skid, and a control system; the piping system includes a nitrogen boosting module and a drive gas module; The nitrogen booster module includes a nitrogen inlet pipeline, two booster pipelines connected in parallel to the output end of the nitrogen inlet pipeline and each equipped with a booster pump, a cooling pipeline located downstream of the two booster pipelines and connected in series with an air cooler, an output pipeline located downstream of the cooling pipeline, and an outlet pipeline located downstream of the output pipeline for connecting to an external nitrogen storage cylinder and / or external gas-using equipment. The booster pump includes a booster pipe connected in series in the booster pipeline and a drive pipe connected to an external pressure gas source; the air cooler includes a heat exchange chamber connected to the external pressure gas source and a spiral cooling pipe connected in series in the cooling pipeline.

[0007] In some embodiments of this disclosure, a pressure gauge and a pressure transmitter that are communicatively connected to the control system are respectively connected in series in the nitrogen inlet pipeline and the output pipeline.

[0008] In some embodiments of this disclosure, the input and output ends of the booster pump are respectively provided with a nitrogen inlet solenoid valve and a booster pump outlet solenoid valve, and both the first outlet pipeline and the second outlet pipeline are provided with nitrogen outlet solenoid valves. The nitrogen inlet solenoid valve, the booster pump outlet solenoid valve, and the nitrogen outlet solenoid valve are all electrically connected to the control module.

[0009] In some embodiments of this disclosure, the skid body is provided with casters at its bottom.

[0010] In some embodiments of this disclosure, the control system includes a PLC disposed inside the skid, a touch screen disposed on the surface of the skid and communicatively connected to the PLC, and an emergency stop button disposed on the surface of the skid and electrically connected to the PLC.

[0011] In some embodiments of this disclosure, the control system further includes an energy storage unit.

[0012] In some embodiments of this disclosure, the nitrogen boosting module further includes a venting module connected to the nitrogen inlet pipe and the output pipe. The venting module is provided with a venting hand valve and a safety valve connected in parallel with the venting hand valve on both sides near the nitrogen inlet pipe and near the output pipe.

[0013] In some embodiments of this disclosure, a muffler is provided at the exhaust port of the air cooler.

[0014] In some embodiments of this disclosure, the nitrogen booster module is provided with stainless steel hoses for connecting external devices at both its inlet and outlet.

[0015] One or more technical solutions provided in the embodiments of this application have at least one of the following technical effects or advantages: 1. By using two compressor pumps in parallel, the problems of low nitrogen recovery efficiency and short compressor pump life are effectively solved, thereby achieving the effect of redundancy and alternating use, and achieving the purpose of improving nitrogen recovery efficiency and extending the life of the device.

[0016] 2. By setting up a skid and installing casters at its bottom, the problem of traditional nitrogen recovery devices being difficult to move is effectively solved, thus facilitating the deployment of nitrogen recovery devices.

[0017] 3. The addition of an energy storage unit to the control system effectively solves the problem of traditional nitrogen recovery devices relying on external power supply, thereby enabling adaptation to areas without power transmission. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an integrated nitrogen recovery and booster device in one embodiment of this application.

[0019] Figure 2 This is a partial structural schematic diagram of an integrated nitrogen recovery and booster device in one embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the piping system of an integrated nitrogen recovery and booster device in one embodiment of this application. Figure 1 .

[0021] Figure 4 This is a schematic diagram of the piping system of an integrated nitrogen recovery and booster device in one embodiment of this application. Figure 2 .

[0022] Figure 5 This is a pipeline system diagram of an integrated nitrogen recovery and pressurization device in one embodiment of this application.

[0023] Figure 6 This is a graph showing the pressure-time data of the inlet and outlet of a single nitrogen cylinder in an integrated nitrogen recovery and pressurization device according to an embodiment of this application.

[0024] Figure 7 This is a graph showing the pressure-time data of the nitrogen filling inlet and outlet of the integrated nitrogen recovery and pressurization device in one embodiment of this application.

[0025] Figure 8 This is a flowchart illustrating the operation of an integrated nitrogen recovery and booster device in one embodiment of this application.

[0026] Figure 9 This is a pipeline system diagram of an integrated nitrogen recovery and pressurization device in another embodiment of this application.

[0027] In the above diagrams, 1 represents the skid, 11 represents the casters, 2 represents the piping system, 21 represents the nitrogen booster module, 211 represents the nitrogen inlet, 2111 represents the low-pressure nitrogen inlet, 2112 represents the first high-pressure nitrogen outlet, 2113 represents the second high-pressure nitrogen outlet, 212 represents the nitrogen inlet pressure gauge, 213 represents the nitrogen inlet pressure transmitter, 214 represents the nitrogen inlet solenoid valve, 2141 represents the first nitrogen inlet solenoid valve, and 2142 represents the second nitrogen inlet solenoid valve. Inlet solenoid valve; 215 is a booster pump; 2151 is the first booster pump; 2152 is the second booster pump; 216 is an outlet solenoid valve; 2161 is the outlet solenoid valve of the first booster pump; 2162 is the outlet solenoid valve of the second booster pump; 2163 is the first nitrogen outlet solenoid valve; 2164 is the second nitrogen outlet solenoid valve; 217 is an air cooler; 2171 is a silencer; 218 is a nitrogen outlet pressure transmitter; 219 is a nitrogen... The system includes: outlet pressure gauge, drive gas module, drive gas inlet, drive gas solenoid valve, first drive gas solenoid valve, second drive gas solenoid valve, booster pump drive gas inlet, first booster pump drive gas inlet, second booster pump drive gas inlet, 2232 booster pump drive gas inlet, second booster pump drive gas inlet, booster pump drive gas outlet, first booster pump drive gas outlet, second booster pump drive gas outlet, 225 air cooler drive gas inlet, venting module, venting outlet, venting manual valve, inlet venting manual valve, outlet venting manual valve, 233 safety valve, inlet safety valve, outlet safety valve, 3 control system, PLC, touch screen, emergency stop button, nitrogen cylinder group, and stainless steel hose. Detailed Implementation

[0028] Unless otherwise specified, all devices and other components involved in the following embodiments are commercially available products.

[0029] This application provides an integrated nitrogen recovery and booster device. Through its compact internal structure and combined design with a pneumatic drive and control system and built-in energy storage, the device is compact, mobile, and can be quickly deployed to work sites in various environments.

[0030] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1 This example discloses an integrated nitrogen recovery and booster device; see [link to relevant documentation]. Figure 1 , Figure 2The device includes a skid 1, a piping system 2 located inside the skid 1, and a control system 3 located inside the skid 1. The skid 1 is a rectangular box containing the core piping system 2. The control system 3 is installed in front of the piping system 2. The lower part of the skid 1 has through holes for air intake and exhaust of the piping system 2, and the upper part has a pressure gauge mounting hole for easy viewing of the pressure gauge. The rated operating pressure of the device is 15 MPa, the maximum operating pressure is 18.75 MPa, and the nitrogen discharge rate is 11.2 Nm³ / h (corresponding to an inlet pressure range of 0.3-2 MPa). The operating environment temperature is -20℃ to +50℃, the humidity is 20% to 95% RH, and the noise level is controlled below 70 dB.

[0032] See Figures 3 to 5 The pipeline system 2 includes a nitrogen pressurization module 21, a venting module 23 located at the inlet and outlet of the nitrogen pressurization module 21, and a driving gas module 22. The nitrogen pressurization module 21 is used to collect and pressurize nitrogen released from external equipment, and then deliver it to a gas tank or other device after cooling. The driving gas module 22 is used to deliver the driving gas to a pneumatic device, such as a compressor pump, and to cool the compressed gas in the compressor pump and air cooler. The venting module 23 is located at the inlet and outlet of the nitrogen pressurization module 21, and ensures the safe operation of the entire device through specially designed valves.

[0033] The nitrogen booster module 21 is connected in series along the nitrogen flow direction as follows: nitrogen inlet pressure gauge 212, nitrogen inlet pressure transmitter 213 (communicating with control system 3), nitrogen inlet solenoid valve 214 (electrically connected with control system 3), booster pump 215 (electrically connected with control system 3), outlet solenoid valve 216 (electrically connected with control system 3), air cooler 217, nitrogen outlet pressure gauge 218, nitrogen outlet transmitter 219 (communicating with control system 3), and nitrogen outlet solenoid valve 216 (electrically connected with control system 3). The nitrogen inlet pressure gauge 212 and nitrogen outlet pressure gauge 218 allow operators to easily monitor the nitrogen pressure at the inlet and outlet. The nitrogen inlet pressure transmitter 213 and nitrogen outlet transmitter 219 transmit the real-time pressure data to the control system 3, enabling the control system 3 to control the operation of each pump and valve in the device according to the pre-written program. The booster pump 215 has a rated flow rate of 12 Nm3 / h, an inlet design pressure of 0.8MPa, and an outlet design pressure of 12.4MPa.

[0034] Nitrogen gas from external devices enters the device through a low-pressure nitrogen inlet 2111. It first passes through a nitrogen inlet pressure gauge 212 and a nitrogen inlet pressure transmitter 213. Then, the nitrogen gas splits into two paths, each entering one of two identical parallel pipelines. The main body of each pipeline is a compression pump 215. A nitrogen inlet solenoid valve 214 is installed at the front end of the compression pump, and an outlet solenoid valve 216 is installed at the rear end of the compression pump. After exiting the compression pump 215, the nitrogen gas becomes high-pressure nitrogen gas. The two pipelines are then combined and fed into an air cooler 217. The cooled nitrogen gas passes through a nitrogen outlet pressure transmitter 218 and a nitrogen outlet pressure gauge 219, and then exits the device through the nitrogen outlet solenoid valves of the two pipelines respectively.

[0035] The driving gas module 22 includes a driving gas solenoid valve 222 with its front end electrically connected to the control system 3, a middle section located in the booster pump 215, and an end connected to the air cooler 217. The driving gas module 22 is used to provide power to the booster pump 215 and cool it down as it passes through the booster pump 215 (self-cooling); after entering the air cooler 217, it exchanges heat with the high-pressure nitrogen gas inside the air cooler 217, thereby cooling the high-pressure nitrogen gas (air cooling).

[0036] The driving gas enters the device through the driving gas inlet 221, and is then fed into the booster pump 215 through two pipelines controlled by the driving gas solenoid valve 222 to provide power. After being output from the booster pump 215, the driving gas enters the air cooler 217 to cool the high-pressure nitrogen output from the booster pump 215.

[0037] The nitrogen booster module 21 has two sets of nitrogen inlet solenoid valve 214, booster pump 215, outlet solenoid valve 216, and nitrogen outlet solenoid valve 216. By controlling both sets of booster pumps 215 to work simultaneously or only one set of booster pumps 215 to work, the nitrogen pressure output by the device can be controlled. There are two nitrogen outlets: the first is connected to the interface on the skid 1 for connecting to the nitrogen collection grid via a hose; the second is used to directly connect to the gas-using equipment.

[0038] The skid 1 is equipped with casters 11 at its bottom. The casters 11 allow for easier and faster deployment of the control device to different work sites.

[0039] The control system 3 includes a PLC 31 located inside the skid 1, a touchscreen 32 located on the surface of the skid 1 and connected to the PLC 31, and an emergency stop button 33 located on the surface of the skid 1 and electrically connected to the PLC 31. The control system 3 receives data transmitted from various pressure transmitters via the PLC 31 and controls the power supply to various valves and pumps to control the operation of the device. The touchscreen 32 allows operators to directly control the operation of internal components of the device through the operating screen. The emergency stop button 33 ensures the device stops in case of an emergency by cutting off the main circuit of the device.

[0040] The PLC 31 includes a housing 311, a PLC control board 312 housed inside the housing 311, and an energy storage unit 313 housed inside the housing. The housing 311 provides protection for the PLC control board 312 and the energy storage unit 313 inside the housing, preventing them from being damaged. The PLC control board 312 is the core component of the control system 3, used to receive signals and control the start and stop of components. The energy storage unit 313 provides power to the electrical equipment inside the device and facilitates the PLC control board 312 in controlling the power supply status of each component. The built-in energy storage unit 313 eliminates the need for an external power supply, thus greatly expanding the application scenarios of this device.

[0041] The venting module 23 includes an outlet venting component located at the outlet end of the nitrogen boosting module 21. The outlet venting component includes an outlet venting manual valve 2322 located on the outlet pipeline of the nitrogen boosting module 21, and an outlet safety valve 2332 connected in parallel with the outlet venting manual valve 2322. By installing venting manual valves and safety valves at the inlet and outlet ends of the nitrogen boosting module 1, the venting module 23 eliminates the problem of excessive nitrogen pressure, thereby significantly improving the safety of the device.

[0042] A muffler 2171 is installed at the exhaust port of the air cooler 217. The installation of the muffler 2171 greatly reduces the noise of the driving air when it is discharged from the device, thereby reducing the noise pollution of this device.

[0043] Both the inlet and outlet ends of the nitrogen booster module 21 are equipped with stainless steel flexible hoses. These hoses allow for easier connection to the air inlets or outlets of external devices, significantly improving the convenience of the device.

[0044] During operation, after the low-pressure nitrogen equipment completes the test, the inlet of the recovery device is connected to the vent outlet of the low-pressure nitrogen equipment (external buffer tank) through a hose. Then, the through-plate connector of the driving air system is connected to the air source of the low-pressure nitrogen equipment through a branch hose, or directly connected to an external compressed air pipeline.

[0045] Start the device, activate the power storage unit in the PLC to supply power to the system, and ensure all solenoid valves (except for the second nitrogen outlet solenoid valve 2164) are normally open. First, purge the system with a small amount of nitrogen to replace the air in the pipeline, ensuring the purity of the gas in the system. Then, perform gas replacement operation on the system pipeline. Open the outlet vent valve 2322, manually open the buffer tank valve and maintain it for 1-2 minutes before closing it. Then, open the nitrogen inlet solenoid valve 214 and the drive gas solenoid valve 222 in sequence. Open the nitrogen cylinder 5 switch and the corresponding solenoid valve, and perform several brief venting operations to replace the air in the pipeline. Start the automatic operation program through the touch screen 32. The device begins to pressurize the recovered nitrogen and fill it into the target nitrogen cylinder or nitrogen collection grid. When the filling pressure reaches the preset value, the equipment automatically stops. After filling is completed, close the nitrogen cylinder valve, open the equipment vent valve to safely release the residual nitrogen in the pipeline, and finally disconnect all connecting hoses and reset all equipment states.

[0046] like Figure 8 As shown, during PLC control system operation: The waste nitrogen discharge port is connected to the low-pressure nitrogen inlet 2111 of this device via a pipeline, and the nitrogen cylinder 5 is connected to the first high-pressure nitrogen outlet 2112. Since the pipe at the high-pressure nitrogen outlet 2112 is connected to the nitrogen cylinder 5, the pressure loss is significantly different from the filling pressure. Therefore, the high-pressure nitrogen outlet pressure can be considered equal to the pressure inside the filling cylinder, that is, the pressure value measured by the nitrogen outlet pressure gauge 219 is the pressure value in the nitrogen cylinder 5.

[0047] When the pressure received by the PLC from the nitrogen outlet pressure transmitter 218 is lower than 10 MPa, the low-pressure nitrogen is sent to the first booster pump 2151 and the second booster pump 2152 via the first nitrogen inlet solenoid valve 2141 and the second nitrogen inlet solenoid valve 2142, respectively. The drive gas inlet 221 is connected to the drive gas, which is sent to the first booster pump 2151 and the second booster pump 2152 via the first drive gas solenoid valve 2221 and the second drive gas solenoid valve 2222, respectively. After the booster pump 215 pressurizes the low-pressure nitrogen, it passes through the first nitrogen outlet solenoid valve 2163 and the second nitrogen outlet solenoid valve 2164, and is sent into the air cooler 217. After cooling and heat exchange, the high-pressure nitrogen is delivered to the first nitrogen outlet solenoid valve 2163 and filled into the nitrogen cylinder 5.

[0048] When the pressure received by the PLC from the nitrogen outlet pressure transmitter 218 is ≥10MPa, the first drive gas solenoid valve 2221, the first nitrogen inlet solenoid valve 2141, the first booster pump outlet solenoid valve 2161, and the first nitrogen outlet solenoid valve 2163 open, while all other solenoid valves close. After running for half an hour, the second drive gas solenoid valve 2222, the second nitrogen inlet solenoid valve 2142, the second booster pump outlet solenoid valve 2162, and the second nitrogen outlet solenoid valve 2164 open, while the others close, and the cycle continues until the pressure reaches 15MPa, at which point the equipment stops.

[0049] like Figure 6 The figure shows the performance curve of the equipment filling a 40L nitrogen cylinder with an initial pressure of 1MPa at an ambient temperature of 25℃. The driving gas pressure was set at 0.7MPa. During the filling process, when the pressure inside the cylinder was ≤10MPa, a dual-pump parallel operation mode was used; after exceeding this pressure, it switched to single-pump cyclic operation. As shown in the figure, the entire filling process took approximately 80 minutes. Figure 7 As shown, under experimental conditions of 25℃ ambient temperature and 0.7MPa driving gas pressure, the equipment conducted a filling test on a nitrogen gas grid with an initial pressure of approximately 1MPa and a total volume of 480L. The filling process employed a staged operation strategy: when the grid pressure was ≤10MPa, a dual-pump parallel mode was activated; once the pressure exceeded this threshold, it switched to a single-pump mode. Ultimately, after approximately 8 hours of cumulative operation, the system successfully increased the grid pressure to 13MPa.

[0050] When operating under non-automatic control: The waste nitrogen discharge port is connected to the low-pressure nitrogen inlet 2111 of this device through a pipeline, and the nitrogen cylinder 5 is connected to the first high-pressure nitrogen outlet 2112.

[0051] When the pressure is below 10MPa, low-pressure nitrogen gas is sent into the booster pump 215 through the first nitrogen inlet solenoid valve 2141 and the second nitrogen inlet solenoid valve 2142.

[0052] The driving gas inlet 221 is connected to the driving gas. The driving gas is sent to the first booster pump 2151 and the second booster pump 2152 via the first driving gas solenoid valve 2221 and the second driving gas solenoid valve 2222, respectively. After the booster pump 215 boosts the low-pressure nitrogen, it passes through the first nitrogen outlet solenoid valve 2163 and the second nitrogen outlet solenoid valve 2164 and is sent into the air cooler 217. After cooling and heat exchange, the high-pressure nitrogen is delivered to the first nitrogen outlet solenoid valve 2163 and filled into the nitrogen cylinder 5.

[0053] When the pressure is ≥10MPa, the device runs for 30 minutes, then stops for 30 minutes, and repeats this cycle until it is filled to 15MPa, at which point the device stops.

[0054] Example 2 This example discloses an integrated nitrogen recovery and booster device, such as... Figure 9 As shown, except for the following differences, the remaining structure is the same as in Embodiment 1: The venting module 23 includes an inlet venting component located at the inlet end of the nitrogen boosting module 1 and an outlet venting component located at the outlet end of the nitrogen boosting module 1. The inlet venting component includes an inlet venting manual valve 2321 located on the inlet pipeline of the nitrogen boosting module 21 and an inlet safety valve 2331 connected in parallel with the inlet venting manual valve 2321. The outlet venting component includes an outlet venting manual valve 2322 located on the outlet pipeline of the nitrogen boosting module 21 and an outlet safety valve 2332 connected in parallel with the outlet venting manual valve 2322. By setting venting manual valves and safety valves at the inlet and outlet ends of the nitrogen boosting module 1, the venting module 23 eliminates the problem of excessive nitrogen pressure, thereby significantly improving the safety of the device.

[0055] Although some preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0056] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of its inventive concept. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An integrated nitrogen recovery and booster device, characterized in that, It includes a skid, a piping system located inside the skid, and a control system; the piping system includes a nitrogen pressurization module and a drive gas module; The nitrogen booster module includes a nitrogen inlet pipeline, two booster pipelines connected in parallel to the output end of the nitrogen inlet pipeline and each equipped with a booster pump, a cooling pipeline located downstream of the two booster pipelines and connected in series with an air cooler, an output pipeline located downstream of the cooling pipeline, and an outlet pipeline located downstream of the output pipeline for connecting to an external nitrogen storage cylinder and / or external gas-using equipment. The booster pump includes a booster pipe connected in series in the booster pipeline and a drive pipe connected to an external pressure gas source; the air cooler includes a heat exchange chamber connected to the external pressure gas source and a spiral cooling pipe connected in series in the cooling pipeline.

2. The integrated nitrogen recovery and booster device according to claim 1, characterized in that, The nitrogen inlet pipeline and the outlet pipeline are respectively equipped with pressure gauges and pressure transmitters that are communicatively connected to the control system.

3. The integrated nitrogen recovery and booster device according to claim 1, characterized in that, The booster pump is equipped with a nitrogen inlet solenoid valve and a booster pump outlet solenoid valve at its input and output ends, respectively. The outlet pipeline includes a first outlet pipeline and a second outlet pipeline. Both the first outlet pipeline and the second outlet pipeline are equipped with nitrogen outlet solenoid valves. The nitrogen inlet solenoid valve, the booster pump outlet solenoid valve, and the nitrogen outlet solenoid valve are all electrically connected to the control system.

4. The integrated nitrogen recovery and booster device according to claim 1, characterized in that, The skid is equipped with casters at the bottom.

5. The integrated nitrogen recovery and booster device according to claim 1, characterized in that, The control system includes a PLC located inside the skid, a touch screen located on the surface of the skid and communicatively connected to the PLC, and an emergency stop button located on the surface of the skid and electrically connected to the PLC.

6. The integrated nitrogen recovery and booster device according to claim 5, characterized in that, The control system also includes an energy storage unit.

7. The integrated nitrogen recovery and booster device according to claim 1, characterized in that, The nitrogen boosting module also includes a venting module connected to the nitrogen inlet pipe and the output pipe. The venting module is provided with a venting hand valve and a safety valve connected in parallel with the venting hand valve on both sides near the nitrogen inlet pipe and near the output pipe.

8. The integrated nitrogen recovery and booster device according to claim 1, characterized in that, A muffler is provided at the exhaust port of the air cooler.

9. The integrated nitrogen recovery and booster device according to claim 1, characterized in that, The nitrogen booster module is equipped with stainless steel flexible hoses at both its inlet and outlet for connecting to external devices.

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