Integrated compressed air and nitrogen generation skid-mounted system

Abstract

The invention relates to an integrated air compression and nitrogen generation skid-mounted system, and belongs to the technical field of air treatment equipment, the integrated air compression and nitrogen generation skid-mounted system comprises a steel bottom skid, an air compression device and a nitrogen preparation device are arranged on the steel bottom skid, and the air compression device comprises an air compressor, a buffer tank, a purification unit and an air storage tank which are arranged on the steel bottom skid; the air compressor compresses air and then sends the compressed air into the buffer tank for pressure stabilization and cooling, and compressed air sent out by the buffer pipe is subjected to impurity removal and drying through the purification unit and then enters the air storage tank; the nitrogen preparation device comprises a nitrogen making machine and a nitrogen storage tank, nitrogen made by the nitrogen making machine enters the nitrogen storage tank, a conveying pipe is arranged between the air storage tank and the nitrogen making machine, and the conveying pipe is used for conveying clean compressed air into the nitrogen making machine. And an opening and closing valve is arranged on the conveying pipe. The device has the effect of integrating air compression and nitrogen preparation equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air treatment equipment, in particular to an integrated compressed air and nitrogen preparation skid-mounted system. BACKGROUND

[0002] In the field of industrial gas supply, compressed air and nitrogen are two widely used gas media, especially in the chemical, food, pharmaceutical, electronic and other industries, which have high requirements for gas purity, stability and system integration. The traditional compressed air and nitrogen preparation system usually adopts a split design, that is, the compressed air preparation system and the nitrogen preparation system are arranged independently, and are connected through external pipelines. This split system has the following problems: Large floor area and scattered layout: the compressor, buffer tank, purification equipment, nitrogen preparation machine and the like are installed separately, occupying a large space, which is not conducive to compact workshops or mobile application scenarios. Low system integration and complex installation: site piping and wiring are required between units, the construction period is long, there is a risk of leakage, and system debugging is complex. Insufficient energy efficiency and stability: due to the dispersion of equipment, the pressure loss is large, and the energy utilization rate is low; at the same time, the system response is slow, and it is difficult to realize rapid start-stop and load regulation. Inconvenient maintenance and management: the equipment units are distributed in different positions, and the workload of inspection, maintenance and replacement of parts is large, and the operation and maintenance cost is high.

[0003] At present, although there are some attempts at integration, they are mostly limited to simple combination and have not achieved true functional integration and structural optimization, especially in terms of multi-stage purification, pressure matching, gas storage and nitrogen preparation collaborative control, there are still technical bottlenecks. SUMMARY

[0004] In order to integrate air compression and nitrogen preparation equipment, the present application provides an integrated compressed air and nitrogen preparation skid-mounted system.

[0005] The integrated compressed air and nitrogen preparation skid-mounted system provided by the present application adopts the following technical solution: An integrated compressed air and nitrogen preparation skid-mounted system, comprising a steel base skid, wherein an air compression device and a nitrogen preparation device are arranged on the steel base skid, the air compression device comprises an air compressor, a buffer tank, a purification unit and an air storage tank arranged on the steel base skid, the air compressor sends the compressed air into the buffer tank for pressure stabilization and cooling, and the compressed air sent by the buffer tank enters the air storage tank after removing impurities and drying by the purification unit; The nitrogen preparation device comprises a nitrogen preparation machine and a nitrogen storage tank, the nitrogen prepared by the nitrogen preparation machine enters the nitrogen storage tank, a conveying pipe is arranged between the air storage tank and the nitrogen preparation machine, the conveying pipe is used to send clean compressed air into the nitrogen preparation machine, and an on-off valve is arranged on the conveying pipe.

[0006] Optionally, the purification unit comprises a filter, the filter comprises a pre-filter, a front filter and a rear filter, the pre-filter, the front filter and the rear filter are located between the buffer tank and the air storage tank, the compressed air in the buffer tank passes through the pre-filter, the front filter and the rear filter in sequence to remove impurities and oil stains in the compressed air.

[0007] Optionally, the purification unit further comprises a dryer and a dew point instrument, the dryer is a micro-heat regeneration adsorption dryer, the dryer is located between the front filter and the rear filter, the dew point instrument is located between the rear filter and the air storage tank, the dryer makes the water dew point of the air reach-40 DEG C.

[0008] Optionally, the steel base sled comprises a rectangular frame and a plurality of reinforcing rods arranged in the rectangular frame, the reinforcing rods are staggered and perpendicular to each other, and the ends of the reinforcing rods are fixedly arranged on the annular surface in the rectangular frame, the steel base sled further comprises moving wheels arranged on the rectangular frame and the reinforcing rods, and the steel base sled further comprises a driving device for driving the moving wheels to abut against the ground to lift the rectangular frame.

[0009] Optionally, the rectangular frame and the reinforcing rods are made of channel steel, the rectangular frame is made of four channel steels welded together, the moving wheels are provided in three groups or more, one group of the moving wheels comprises at least three moving wheels, the moving wheels in one group are located on the same straight line and the straight line is parallel to the width direction of the rectangular frame, the three groups of moving wheels are located at the front, middle and rear parts of the rectangular frame respectively, the driving device comprises a first driving member and a second driving member, the first driving member is used to drive the moving wheels to move towards the ground to abut against the ground, and the second driving member is used to drive the moving wheel group located at the middle part to move along the middle part of the rectangular frame.

[0010] Optionally, the moving wheels are located inside the channel steel, the contact surface of the channel steel with the ground is provided with a moving gap, the moving wheels are moved out of the channel steel through the moving gap to abut against the ground, the first driving member comprises a hydraulic cylinder arranged in the channel steel, the body of the hydraulic cylinder is fixedly arranged on the inner wall of the channel steel, the length direction of the piston rod of the hydraulic cylinder is parallel to the height direction of the channel steel, and the mounting seat of the moving wheel is fixedly arranged on the end of the piston rod of the hydraulic cylinder.

[0011] Optionally, the moving gap corresponding to the lateral sliding of the middle part of the moving wheel is in the shape of a strip, the second driving member comprises a driving motor arranged outside the channel steel in the width direction of the rectangular frame, a connecting rope wound on the output shaft of the driving motor and a sliding plate arranged in the channel steel, the sliding plate slides along the length direction of the rectangular frame, the hydraulic cylinder body corresponding to the sliding movement is fixedly arranged on the sliding plate, the driving motor is arranged at two ends of the rectangular frame respectively, and the two connecting ropes are fixedly connected to the sliding plate respectively.

[0012] Optionally, the face of the sliding plate towards the top surface of the channel steel abuts against the upper end surface of the channel steel.

[0013] Optionally, a winding shaft is arranged on the output shaft of the driving motor, a plurality of winding wheels are arranged on the winding shaft, and the connecting rope is wound on the winding wheels.

[0014] Optionally, a worm wheel is coaxially arranged on the winding shaft, a worm wheel engaged with the worm is coaxially arranged on the output shaft of the driving motor, and the connecting rope is a steel rope.

[0015] In summary, the present application has at least one of the following beneficial technical effects: The air compressor compresses air and sends it into an air buffer tank for pressure stabilization and preliminary cooling. Purification and drying: the compressed air from the buffer tank passes through a pre-filter, a front filter, a non-thermal regenerative adsorption dryer and a rear filter in sequence. The purification process can remove impurities and oil stains in the air, and the water dew point of the air can reach below-40 DEG C through the dryer. Storage and output: the purified clean air enters the instrument air storage tank and can be used as instrument air to meet the air consumption for 30 minutes after shutdown. Part of the purified compressed air is sent to a nitrogen generator to separate nitrogen. The prepared nitrogen enters the nitrogen storage tank for storage for use. The system is a skid-mounted integrated design, all the above-mentioned devices, including the compressor, the storage tank, the filter, the dryer, the nitrogen generator and the supporting pipelines, valves, instruments and electrical control system, are integrated on a steel base skid to form a complete and independent unit. When the steel skid needs to be transported or needs to be lifted for maintenance of the air compression device and the nitrogen production device, first, the end of the steel skid with a larger mass is determined, then the moving wheels are driven to slide towards the ground direction by the hydraulic cylinders at the other end and the hydraulic cylinders at the middle part, the moving wheels pass through the moving gap and abut against the ground, so as to drive the end with a lighter mass to be lifted in a direction away from the ground, and one end of the rectangular frame is separated from the ground, then the hydraulic cylinders at the middle part are retracted to separate the moving wheels from the ground, the moving wheels at the middle part are slid, and the moving wheels move towards the side with a larger mass, when the moving wheels abut against the ground, the side with a lighter mass of the rectangular frame moves towards the ground direction under the action of gravity to drive the side with a larger mass of the rectangular frame to be lifted, when the side with a larger mass of the rectangular frame is lifted, the corresponding hydraulic cylinders are started to drive the moving wheels to abut against the ground, at this time, the rectangular frame returns to the balanced state, and in the above process, only a smaller load provided by the hydraulic cylinders is needed to achieve the effect of lifting the steel skid. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a whole structure schematic diagram of an integrated air compression and nitrogen production skid-mounted system according to an embodiment of the present application; Figure 2 is a structure schematic diagram of a steel skid in an integrated air compression and nitrogen production skid-mounted system according to an embodiment of the present application; Figure 3 is Figure 2 is an enlarged schematic diagram of part A.

[0017] Marked as follows: 1, steel skid; 11, rectangular frame; 12, reinforcing rod; 13, moving wheel; 14, driving device; 141, hydraulic cylinder; 142, driving motor; 143, connecting rope; 144, sliding plate; 145, winding shaft; 146, winding wheel; 147, worm gear; 148, worm; 2, air compression device; 21, air compressor; 22, buffer tank; 23, pre-filter, 24, pre-positioned filter; 25, post-positioned filter; 26, dryer; 27, dew point instrument; 28, air storage tank; 3, nitrogen production device; 31, nitrogen production machine; 32, nitrogen storage tank; 33, conveying pipe; 4, moving gap. DETAILED DESCRIPTION

[0018] The following will be described in detail in combination with the accompanying Figures 1-3 The present application will be further described in detail.

[0019] An integrated air compression and nitrogen production skid-mounted system is disclosed according to an embodiment of the present application. Refer to Figure 1, the integrated compressed air and nitrogen preparation skid-mounted system comprises a steel skid 1, wherein an air compression device 2 and a nitrogen preparation device 3 are arranged on the steel skid 1; the air compression device 2 comprises an air compressor 21, a buffer tank 22, a purification unit and an air storage tank 28 arranged on the steel skid 1; the air compressor 21 sends compressed air into the buffer tank 22 for pressure stabilization and cooling; the compressed air sent out by the buffer tank 22 enters the air storage tank 28 after impurity removal and drying through the purification unit; The air compressor 21 sends compressed air into the air buffer tank 22 for pressure stabilization and preliminary cooling; after the compressed gas in the air buffer tank 22 passes through the purification unit, impurities and oil stains in the air can be removed; the purified clean air enters the air storage tank and can be used as instrument air to meet the air consumption in 30 minutes after shutdown.

[0020] With reference to Figure 1 The nitrogen preparation device 3 comprises a nitrogen generator 31 and a nitrogen storage tank 32; the nitrogen generated by the nitrogen generator 31 enters the nitrogen storage tank; a conveying pipe 33 is arranged between the air storage tank 28 and the nitrogen generator 31 and is used for sending clean compressed air into the nitrogen generator 31; an on-off valve is arranged on the conveying pipe 33; part of the purified compressed air is sent into the nitrogen generator 31, nitrogen is separated out, and the generated nitrogen is stored in the nitrogen storage tank for use; the system is designed in a skid-mounted integrated manner; all the devices, including the compressor, the storage tank, the filter, the dryer, the nitrogen generator 31 and the matched pipeline, valve, instrument and electrical control system, are integrated on the steel skid 1 to form a complete and independent unit.

[0021] With reference to Figure 1 In the embodiment, two sets of air compression devices 2 are arranged and the two sets of air compression devices 2 are parallel to each other; the nitrogen preparation device 3 is connected with any one set of air compression device 2.

[0022] With reference to Figure 1 In the embodiment, the purification unit comprises a filter, the filter comprises a pre-filter 23, a front filter 24 and a rear filter 25; the pre-filter 23, the front filter 24 and the rear filter 25 are located between the buffer tank 22 and the air storage tank 28; the compressed air in the buffer tank 22 passes through the pre-filter 23, the front filter 24 and the rear filter 25 in sequence to remove impurities and oil stains in the compressed air; the compressed air out of the buffer tank 22 passes through the pre-filter 23, the front filter 24 and the rear filter 25 in sequence, which can remove impurities and oil stains in the air.

[0023] With reference to Figure 1In the embodiment of the present application, the purification unit further comprises a dryer 26 and a dew point instrument 27, the dryer 26 is a micro-heat regeneration adsorption dryer, the dryer 26 is located between the pre-filter 24 and the post-filter 25, the dew point instrument 27 is located between the post-filter 25 and the air storage tank 28, and the dryer 26 makes the water dew point of the air reach -40℃.

[0024] With reference to Figure 1 , Figure 2 and Figure 3 , in order to move or lift the steel skid 1 for maintenance of the air compression device 2 and the nitrogen preparation device 3, the steel skid 1 comprises a rectangular frame 11 and a plurality of reinforcing rods 12 arranged in the rectangular frame 11, the reinforcing rods 12 are arranged in a staggered manner and perpendicular to each other, and the ends of the reinforcing rods 12 are fixedly arranged on the inner ring surface of the rectangular frame 11; under the action of the reinforcing rods 12, the inside of the rectangular frame 11 is supported, thereby improving the bearing capacity of the rectangular frame 11, in addition, the reinforcing rods 12 also serve as the mounting of the air compression device 2 and the nitrogen preparation device 3, thereby facilitating the integration of the air compression device 2 and the nitrogen preparation device 3 on the steel skid 1; the steel skid 1 further comprises moving wheels 13 arranged on the rectangular frame 11 and the reinforcing rods 12, and the steel skid 1 further comprises a driving device 14 for driving the moving wheels 13 to abut against the ground to lift the rectangular frame 11; when the steel skid 1 needs to be moved or lifted, the driving device 14 drives the moving wheels 13 to abut against the ground, thereby relatively moving the rectangular frame 11 in a direction away from the ground, so that the rectangular frame 11 is separated from the ground, which is simple and convenient to operate.

[0025] With reference to Figure 1 , Figure 2 and Figure 3 , in the embodiment of the present application, in order to reduce the load of the driving device 14 and facilitate the lifting of the rectangular steel frame, the rectangular frame 11 and the reinforcing rods 12 are both made of channel steel, the rectangular frame 11 is made of four channel steels welded together, the moving wheels 13 are provided in three groups or more, one group of the moving wheels 13 comprises at least three moving wheels 13, the moving wheels 13 in one group are located on the same straight line and the straight line is parallel to the width direction of the rectangular frame 11, the three groups of moving wheels 13 are located at the front, middle and rear parts of the rectangular frame 11 respectively, the driving device 14 comprises a first driving member and a second driving member, the first driving member is used to drive the moving wheels 13 to move in the direction of the ground to abut against the ground, and the second driving member is used to drive the group of moving wheels 13 located at the middle part to move along the middle part of the rectangular frame 11; With reference to Figure 1 , Figure 2 and Figure 3In the embodiment of the present application, the rectangular frame 11 is used to mount the air compressor 21 on one side which is the heavier side (the rear part in the foregoing), and the nitrogen gas preparation device 3 on the other side which is the lighter side (the front part in the foregoing).

[0026] When the steel skid 1 is lifted, first, the first driving member drives the front part of the rectangular frame 11 to move the moving wheel 13 towards the ground to abut against the ground, thereby driving the front part of the rectangular frame 11 to separate from the ground, then the second driving member drives the moving wheel 13 in the middle part to move towards the rear part to be close to the air compressor 21, then the first driving member of the front part drives the moving wheel 13 to separate from the ground, at this time, under the action of the lever principle, the front part of the rectangular frame 11 moves towards the lower part, thereby driving the rear part of the rectangular frame 11 to move towards the upper part, and then the moving wheel 13 in the rear part of the rectangular frame 11 abuts against the ground, then the first driving member is used to level the rectangular frame 11, thereby completing the lifting of the steel skid 1; in the above process, the lever principle is used for multiple times, in the first time, the corner of the rear part of the rectangular frame 11 is used as the supporting point, and the edge of the front part of the rectangular frame 11 is used as the force point, thereby realizing the maximization of the force arm and facilitating the lifting of one side of the rectangular frame 11; then the second driving member drives the moving wheel 13 in the middle part to move, so that the moving wheel 13 moves towards the rear part and abuts against the ground, then the rectangular frame 11 is deflected by the moving wheel 13 in the middle part, thereby driving the rear part of the rectangular frame 11 to rotate and separate from the ground, and the driving force does not need to be applied to the rear part of the rectangular frame 11 to realize the lifting of the rectangular frame 11.

[0027] Referring to Figure 1 , Figure 2 and Figure 3 In the embodiment of the present application, the moving wheel 13 is located inside the channel steel, the contact surface of the channel steel and the ground is provided with a moving gap 4, the moving wheel 13 moves out from the channel steel through the moving gap 4 to abut against the ground, the first driving member includes a hydraulic cylinder 141 arranged in the channel steel, the body of the hydraulic cylinder 141 is fixedly arranged on the inner wall of the channel steel, the length direction of the piston rod of the hydraulic cylinder 141 is parallel to the height direction of the channel steel, and the mounting seat of the moving wheel 13 is fixedly arranged on the end part of the piston rod of the hydraulic cylinder 141; when one side of the rectangular frame 11 is lifted, the hydraulic cylinder 141 is started, the hydraulic cylinder 141 drives the moving wheel 13 to move out from the channel steel through the moving gap 4 to abut against the ground, thereby driving one side of the rectangular frame 11 to be lifted, and the operation is simple and convenient.

[0028] Referring to Figure 1 , Figure 2 and Figure 3In the embodiment of the present application, the moving gap 4 corresponding to the lateral sliding of the middle moving wheel 13 is in the shape of a long strip, the second driving member comprises a driving motor 142 arranged outside the channel steel in the width direction of the rectangular frame 11, a connecting rope 143 wound on the output shaft of the driving motor 142, and a sliding plate 144 slidingly arranged in the channel steel, the sliding plate 144 slides along the length direction of the rectangular frame 11, the hydraulic cylinder 141 body is fixedly arranged on the sliding plate 144, the driving motor 142 is arranged at two ends of the rectangular frame 11 respectively, and the two connecting ropes 143 are fixedly connected on the sliding plate 144 respectively; when the moving wheel 13 in the middle of the rectangular frame 11 moves, the driving motor 142 is started, the driving motor 142 winds the connecting rope 143, the connecting rope 143 winding drives the sliding plate 144 to slide in the channel steel, the sliding plate 144 sliding drives the hydraulic cylinder 141 and the moving wheel 13 to move, and the operation is simple and convenient.

[0029] With reference to Figure 1 , Figure 2 and Figure 3 , in order to facilitate the synchronous movement of the moving wheel 13 in the middle of the rectangular frame 11, the output shaft of the driving motor 142 is provided with a winding shaft 145, the winding shaft 145 is provided with a plurality of winding wheels 146, and the connecting rope 143 is wound on the winding wheel 146; when the moving wheel 13 in the middle moves synchronously, the driving motor 142 is started, the driving motor 142 drives the winding shaft 145 to rotate, the winding shaft 145 rotating drives the winding wheel 146 to rotate, and the connecting rope 143 is wound synchronously, so as to drive the moving wheel 13 in the middle to move synchronously and move to one side of the rectangular frame 11, and the operation is simple and convenient.

[0030] With reference to Figure 1 , Figure 2 and Figure 3 , when the rectangular frame 11 rotates with the moving wheel 13 in the middle as the fulcrum, under the action of the gravity of the rectangular frame 11, the moving wheel 13 is easily caused to slide in the channel steel passively, therefore, in order to facilitate the fixation of the moving wheel 13 in the moved position, the winding shaft 145 is coaxially provided with a worm wheel 147, the output shaft of the driving motor 142 is coaxially provided with a worm wheel 147 engaged with a worm 148, and the connecting rope 143 is a steel rope; under the action of the worm wheel 147 and the worm 148, the position of the sliding plate 144 is fixed, the moving wheel 13 is fixed in the moved position, so as to avoid the movement of the moving wheel 13 in the rotating process of the rectangular frame 11, and facilitate the separation of the rear part of the rectangular frame 11 from the ground; the connecting rope 143 is a steel rope, so as to reduce the possibility of the stretching of the connecting rope 143, improve the stability of the position of the sliding plate 144, and make the position of the moving wheel 13 more stable.

[0031] With reference to Figure 1 , Figure 2 and Figure 3In the embodiment of the present application, the sliding plate 144 abuts against the upper end surface of the channel steel from the surface of the top of the channel steel. Under the action of the sliding plate 144, the load borne by the hydraulic cylinder 141 is transmitted to the top of the channel steel, thereby reducing the possibility of damage to the hydraulic cylinder 141 and prolonging the service life of the hydraulic cylinder 141.

[0032] The implementation principle of the integrated compressed air and nitrogen production skid-mounted system in the embodiment of the present application is as follows: The air compressor 21 sends the compressed air into the air buffer tank 22 for pressure stabilization and preliminary cooling. Purification and drying: the compressed air from the buffer tank 22 passes through the pre-filter 23, the pre-positioned filter 24, the non-thermal regenerative adsorption dryer 26 and the post-positioned filter 25 in sequence. The purification process can remove impurities and oil stains in the air, and the water dew point of the air can reach below-40℃ through the dryer 26. Storage and output: the purified clean air enters the instrument air storage tank, which can be used as instrument air to meet the air consumption for 30 minutes after shutdown. Part of the purified compressed air is sent into the nitrogen generator 31 to separate nitrogen. The produced nitrogen enters the nitrogen storage tank for storage for use. The system is designed as a skid-mounted integrated system, and all the above-mentioned devices, including the compressor, the storage tank, the filter, the dryer, the nitrogen generator 31 and the supporting pipelines, valves, instruments and electrical control system, are integrated on the steel base skid 1 to form a complete and independent unit. When the steel base skid 1 needs to be transported or needs to be lifted for maintenance of the air compression device 2 and the nitrogen production device 3, first, the end with larger mass of the steel base skid 1 is determined, then the moving wheels 13 at the other end and the middle of the steel base skid 1 are driven to slide towards the ground through the hydraulic cylinders 141, the moving wheels 13 pass through the moving gap 4 and abut against the ground, thereby driving the end with smaller mass to be lifted away from the ground, then the hydraulic cylinders 141 at the middle of the steel base skid 1 are retracted to drive the moving wheels 13 to be separated from the ground, the moving wheels 13 at the middle are slid again, and the moving wheels 13 move towards the side with larger mass. When the moving wheels 13 abut against the ground, the side with smaller mass of the rectangular frame 11 moves towards the ground under the action of gravity to drive the side with larger mass of the rectangular frame 11 to be lifted. When the side with larger mass of the rectangular frame 11 is lifted, the corresponding hydraulic cylinders 141 are started to drive the moving wheels 13 to abut against the ground. At this time, the rectangular frame 11 returns to the balanced state. In the above process, only a small load needs to be provided by the hydraulic cylinders 141 to achieve the effect of lifting the steel base skid 1.

[0033] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered by the protection scope of the present application.

Claims

1. An integrated compressed air and nitrogen generation skid-mounted system, characterized in that: It includes a steel skid (1), on which an air compressor (2) and a nitrogen preparation device (3) are installed. The air compressor (2) includes an air compressor (21), a buffer tank (22), a purification unit and an air storage tank (28) installed on the steel skid (1). The air compressor (21) compresses the air and sends it into the buffer tank (22) for pressure stabilization and cooling. The compressed air sent out by the buffer tube enters the air storage tank (28) after the purification unit removes impurities and dries it. The nitrogen preparation device (3) includes a nitrogen generator (31) and a nitrogen storage tank (32). The nitrogen generated by the nitrogen generator (31) enters the nitrogen storage tank. A delivery pipe (33) is provided between the air storage tank (28) and the nitrogen generator (31). The delivery pipe (33) is used to send clean compressed air into the nitrogen generator (31). An on / off valve is provided on the delivery pipe (33).

2. The integrated compressed air and nitrogen generator skid-mounted system according to claim 1, characterized in that: The purification unit includes a filter, which includes a pre-filter (23), a pre-filter (24), and a post-filter (25). The pre-filter (23), pre-filter (24), and post-filter (25) are located between a buffer tank (22) and an air storage tank (28). The compressed air in the buffer tank (22) passes through the pre-filter (23), pre-filter (24), and post-filter (25) in sequence to remove impurities and oil stains from the compressed air.

3. The integrated compressed air and nitrogen generator skid-mounted system according to claim 2, characterized in that: The purification unit also includes a dryer (26) and a dew point meter (27). The dryer (26) is a micro-heat regeneration adsorption dryer. The dryer (26) is located between the pre-filter (24) and the post-filter (25). The dew point meter (27) is located between the post-filter (25) and the air storage tank (28). The dryer (26) makes the water dew point of the air reach -40°C.

4. The integrated compressed air and nitrogen generator skid-mounted system according to claim 1, characterized in that: The steel skid (1) includes a rectangular frame (11) and a plurality of reinforcing rods (12) arranged within the rectangular frame (11). The reinforcing rods (12) are staggered and perpendicular to each other, and the ends of the reinforcing rods (12) are fixedly arranged on the inner ring surface of the rectangular frame (11). The steel skid (1) also includes moving wheels (13), which are arranged on the rectangular frame (11) and the reinforcing rods (12). The steel skid (1) also includes a drive device (14), which is used to drive the moving wheels (13) to contact the ground and lift the rectangular frame (11).

5. The integrated compressed air and nitrogen generator skid-mounted system according to claim 4, characterized in that: The rectangular frame (11) and the reinforcing rod (12) are both made of channel steel. The rectangular frame (11) is welded from four channel steels. There are three or more sets of moving wheels (13). Each set of moving wheels (13) includes at least three moving wheels (13). The moving wheels (13) in a set are located on the same straight line and the straight line is parallel to the width direction of the rectangular frame (11). The three sets of moving wheels (13) are located at the front, middle and rear of the rectangular frame (11) respectively. The driving device (14) includes a first driving member and a second driving member. The first driving member is used to drive the moving wheels (13) to move towards the ground and abut against the ground. The second driving member is used to drive the set of moving wheels (13) located in the middle to move along the middle of the rectangular frame (11).

6. The integrated compressed air and nitrogen generator skid-mounted system according to claim 5, characterized in that: The movable wheel (13) is located inside the channel steel. The contact surface between the channel steel and the ground is provided with a movable notch (4). The movable wheel (13) moves out of the channel steel through the movable notch (4) and abuts against the ground. The first driving component includes a hydraulic cylinder (141) disposed inside the channel steel. The body of the hydraulic cylinder (141) is fixedly disposed on the inner wall of the channel steel. The length direction of the piston rod of the hydraulic cylinder (141) is parallel to the height direction of the channel steel. The mounting seat of the movable wheel (13) is fixedly disposed at the end of the piston rod of the hydraulic cylinder (141).

7. The integrated compressed air and nitrogen generator skid-mounted system according to claim 6, characterized in that: The moving notch (4) of the moving wheel (13) that slides laterally in the middle is long and narrow. The second driving component includes a drive motor (142) located on the outside of the channel steel in the width direction of the rectangular frame (11), a connecting rope (143) wound on the output shaft of the drive motor (142), and a sliding plate (144) slidably disposed in the channel steel. The sliding plate (144) slides along the length direction of the rectangular frame (11). The body of the moving hydraulic cylinder (141) corresponding to the sliding is fixedly disposed on the sliding plate (144). There are two drive motors (142) and they are located at both ends of the rectangular frame (11). The two connecting ropes (143) are fixedly connected to the sliding plate (144).

8. The integrated compressed air and nitrogen generator skid-mounted system according to claim 7, characterized in that: The sliding plate (144) abuts against the upper end face of the channel steel on the side facing the top surface of the channel steel.

9. An integrated compressed air and nitrogen generator skid-mounted system according to claim 7, characterized in that: The drive motor (142) output shaft is provided with a take-up shaft (145), and the take-up shaft (145) is provided with a plurality of take-up wheels (146), and the connecting rope (143) is wound on the take-up wheels (146).

10. An integrated compressed air and nitrogen generator skid-mounted system according to claim 9, characterized in that: A worm gear (147) is coaxially mounted on the winding shaft (145), and a worm gear (147) that meshes with the worm (148) is coaxially mounted on the output shaft of the drive motor (142). The connecting rope (143) is a steel rope.

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