Compressed air supply device for oil gas recovery

Abstract

The utility model discloses a compressed air supply device for oil gas recovery. The compressed air supply device comprises an air compression unit, and the air compression unit comprises an air compressor; the pressure stabilizing and water removing unit comprises a water removing tank, and an air inlet of the water removing tank is connected with an air outlet of the air compressor through a connecting pipe; a pressure reducing valve is arranged at an air outlet of the water removal tank; the adsorption drying unit comprises a first adsorption drying tank and a second adsorption drying tank which are arranged in parallel, air inlets of the first adsorption drying tank and the second adsorption drying tank are respectively connected with the pressure reducing valve, and compressed air adsorbed by the first adsorption drying tank and the second adsorption drying tank is filtered by a filtering device and then is sent out. According to the compressed air supply device, by integrating a plurality of functional units, efficient compression, stable-pressure water removal and adsorption drying of air are achieved, and the overall performance and stability of a system are improved.

Description

Technical Field

[0001] This application belongs to the field of compressed air treatment technology, and specifically relates to a compressed air supply device for oil and gas recovery. Background Technology

[0002] In the operation of oil and gas recovery systems, air compressors are commonly used to provide compressed air to meet the needs of various pneumatic equipment, processes, and experimental devices. However, the compressed air discharged from air compressors is often unstable and contains a certain amount of moisture. If this moisture is not treated, it may adversely affect product quality, equipment performance, and production efficiency. Therefore, developing a system that can efficiently and stably provide dry and clean air is particularly important. Utility Model Content

[0003] Purpose of the utility model: This application provides a compressed air supply device for oil and gas recovery. This device can efficiently remove moisture from the compressed air discharged from the air compressor, improve the dryness of the gas, and meet the needs of oil and gas recovery devices and other fields.

[0004] Technical Solution: This application provides a compressed air supply device for oil and gas recovery, including an air compression unit, a pressure stabilizing and dehydrating unit connected to the outlet of the air compression unit, and an adsorption drying unit connected to the outlet of the pressure stabilizing and dehydrating unit; the air compression unit includes an air compressor; the pressure stabilizing and dehydrating unit includes a dehydration tank, the inlet of which is connected to the outlet of the air compressor; a pressure reducing valve is provided at the outlet of the dehydration tank; the adsorption drying unit includes a first adsorption drying tank and a second adsorption drying tank, the inlets of which are both connected to the outlet of the pressure reducing valve.

[0005] In some embodiments, the air compression unit includes a first filter, the inlet of which is connected to the outlet of the air compressor, and the outlet of which is connected to the inlet of the dewatering tank.

[0006] In some embodiments, the air compression unit includes a first safety valve disposed at the emergency discharge port of the air compressor.

[0007] In some embodiments, the air compression unit includes a first drainer disposed on the liquid outlet line at the bottom of the air compressor.

[0008] In some embodiments, the air compression unit includes a second drainer disposed on the bottom outlet line of the first filter.

[0009] In some embodiments, the first filter is used to filter particles in the gas with a particle size ≥ 1 μm.

[0010] In some embodiments, the pressure-stabilizing dewatering unit includes a second safety valve, which is disposed at the emergency discharge outlet of the dewatering tank.

[0011] In some embodiments, the pressure-stabilizing and dewatering unit includes a third drainer connected to the outlet of the dewatering tank.

[0012] In some embodiments, the pressure-stabilizing dewatering unit includes a pressure transmitter, which is disposed on the connecting pipeline between the air outlet of the dewatering tank and the air inlet of the pressure reducing valve.

[0013] In some embodiments, the pressure-stabilizing dewatering unit includes a pressure gauge disposed on the top of the dewatering tank.

[0014] In some embodiments, the adsorption drying unit further includes a first inlet electric valve and a second inlet electric valve; the first inlet electric valve is disposed between the air inlet of the first adsorption drying tank and the air outlet of the pressure reducing valve; the second inlet electric valve is disposed between the air inlet of the second adsorption drying tank and the air outlet of the pressure reducing valve.

[0015] In some embodiments, the adsorption drying unit further includes a first exhaust check valve and a second exhaust check valve; the first exhaust check valve is disposed at the top exhaust port of the first adsorption drying tank, and the second exhaust check valve is disposed at the top exhaust port of the second adsorption drying tank.

[0016] In some embodiments, the adsorption drying unit further includes a first pressure relief electric valve and a second pressure relief electric valve; the first pressure relief electric valve is disposed at the bottom outlet of the first adsorption drying tank, and the second pressure relief electric valve is disposed at the bottom outlet of the second adsorption drying tank.

[0017] In some embodiments, the adsorption drying unit further includes a third safety valve and a fourth safety valve; the third safety valve is disposed at the top emergency discharge port of the first adsorption drying tank, and the fourth safety valve is disposed at the top emergency discharge port of the second adsorption drying tank.

[0018] In some embodiments, the filtration device in the adsorption drying unit further includes a primary filter and a secondary filter arranged in series, wherein the air inlet of the primary filter is connected to the first exhaust check valve and the second exhaust check valve, respectively.

[0019] In some embodiments, the primary filter is used to remove particles with a diameter ≥1 μm from the gas; the secondary filter is used to remove particles with a diameter ≥0.01 μm from the gas.

[0020] In some embodiments, a system electric valve is provided between the first adsorption drying tank and the second adsorption drying tank, the system electric valve being used to adjust and switch the gas flow rate used for desorption between the first adsorption drying tank and the second adsorption drying tank.

[0021] In some embodiments, the first adsorption drying tank and the second adsorption drying tank are respectively filled with adsorption materials, the adsorption materials including alumina in the lower layer and water-absorbing molecular sieve in the upper layer of alumina.

[0022] Beneficial Effects: This application provides a compressed air supply device for oil and gas recovery, including an air compression unit comprising an air compressor; a pressure stabilizing and dehydrating unit comprising a dehydration tank, the inlet of which is connected to the outlet of the air compressor via a connecting pipe; and a pressure reducing valve at the outlet of the dehydration tank; and an adsorption drying unit comprising a first adsorption drying tank and a second adsorption drying tank arranged in parallel, the inlets of which are respectively connected to the pressure reducing valve. The compressed air adsorbed by the first and second adsorption drying tanks is filtered by a filter device before being delivered. This compressed air supply device, by integrating multiple functional units, achieves efficient air compression, pressure stabilizing and dehydrating, and adsorption drying, thereby improving the overall performance and stability of the system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the compressed air supply device for oil and gas recovery in the embodiments of this application;

[0024] Figure 2 This is a cross-sectional view of the water removal tank in an embodiment of this application;

[0025] Reference numerals: Air compression unit-100, air compressor-101, first filter-102, first safety valve-103, first drain-104, second drain-105; Pressure stabilizing and dehydrating unit-200, dehydrating tank-201, air inlet line-2011, pressure reducing valve-202, second safety valve-203, third drain-204, pressure transmitter-205, pressure gauge-206; Adsorption drying unit-300, first adsorption drying tank. -301, First Inlet Electric Valve -302, First Outlet Check Valve -303, First Pressure Relief Electric Valve -304, First Silencer -305, Third Safety Valve -306, System Electric Valve -310, Second Adsorption Drying Tank -311, Second Inlet Electric Valve -312, Second Outlet Check Valve -313, Second Pressure Relief Electric Valve -314, Second Silencer -315, Fourth Safety Valve -316, Primary Filter -320, Secondary Filter -330. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] This application provides a compressed air supply device for oil and gas recovery, such as... Figure 1 As shown, the compressed air supply device includes an air compression unit 100, a pressure stabilizing and dehydrating unit 200 connected to the air pipe of the air compressor 100, and an adsorption drying unit 300 connected to the air path of the pressure stabilizing and dehydrating unit 200.

[0030] The air compression unit 100 in this embodiment includes an air compressor 101, a first filter 102 connected to the air outlet of the air compressor 101, a first safety valve 103 connected to the emergency discharge outlet of the air compressor 101, a first drain 104 connected to the liquid outlet of the air compressor 101, and a second drain 105 connected to the liquid outlet of the first filter 102.

[0031] In some specific embodiments, the air compressor 101 is an outdoor explosion-proof air compressor, employing an explosion-proof motor and an explosion-proof and anti-static belt to meet the safety requirements of the oil and gas recovery device used in outdoor explosion-proof locations. In some embodiments, the air compressor 101 draws in air and compresses it to a certain pressure, such as 0.8 MPa (g, gauge pressure value).

[0032] In some specific embodiments, the first filter 102 uses a T-class filter element to remove impurities ≥1μm and some moisture from the compressed air.

[0033] In this application, the first filter 102 is located at the outlet of the air compressor 101. Compressed air is sent into the first filter 102 for filtration, completing air compression and primary filtration. The first safety valve 103 is installed at the emergency outlet of the air compressor to automatically release pressure when the system is overpressurized, ensuring the safety of the air compression system and avoiding the risk of overpressure. A first drain 104 and a second drain 105 are respectively installed on the bottom liquid outlet lines of the air compressor 101 and the first filter 102, performing two-stage gas-liquid separation to remove water and automatically discharge it, realizing the periodic automatic discharge of accumulated water.

[0034] The pressure-stabilizing dehydration unit 200 in this embodiment includes a dehydration tank 201, a pressure reducing valve 202 connected to the air outlet of the dehydration tank 201, a second safety valve 203 connected to the emergency drain port at the top of the dehydration tank 201, a third drainer 204 connected to the liquid outlet of the dehydration tank 201, a pressure gauge 206 and a pressure transmitter 205 connected to the top of the dehydration tank 201. The pressure transmitter 205 is installed on the pipeline between the air outlet of the dehydration tank 201 and the air inlet of the pressure reducing valve 202.

[0035] In some embodiments, such as Figure 2 As shown, the air inlet pipe 2011 of the dewatering tank 201 extends along the tangential direction of the tank wall. When the gas enters the dewatering tank 201, it is guided and redirected by a cyclone, and then centrifugally separated at high speed to the tank wall. Through gravity settling, it collects at the bottom of the tank. Liquid water mixed with solid particles is discharged through the drain pipe. The dewatering tank 201 achieves gas buffering and pressure stabilization for dewatering. The pressure reducing valve 202 is used to adjust the output pressure of the compressed air to the required range of 0.6 MPa (g, gauge pressure value). The second safety valve 203 of this application is used to automatically release pressure when the dewatering tank 201 is over-pressurized to ensure the safety of the pressure stabilization and dewatering unit 200. The third drainer 204 is responsible for periodically and automatically discharging the water in the dewatering tank 201. The pressure transmitter 205 monitors the pressure of the compressed air in real time and transmits the signal to the control system. The pressure gauge 206 provides an intuitive pressure indication for easy inspection and maintenance.

[0036] This application buffers compressed air by installing a dehydration tank 201 on the main gas pipeline. Simultaneously, it stabilizes the pressure of the compressed air by working with a pressure reducing valve 202. Furthermore, through the structural design of a pressure transmitter 205 and a pressure gauge 206, it enables on-site monitoring and remote control. It can also perform gas-liquid separation and dehydration of the compressed air again and automatically discharge the water. The pressure of the pressure stabilizing and dehydrating unit 200 is stably controlled within the required range of 0.6 MPa (g), and the pressure stabilizing and dehydrating unit 200 avoids the risk of overpressure by installing a second safety valve 203.

[0037] The water removal tank 201 of this application can efficiently remove water. When the mixed gas containing impurities such as solid particles and liquid water enters the water removal tank 201, it is guided and changed direction by a cyclone and then separated by high-speed centrifugal separation to the tank wall. Through gravity settling, it is collected in the bottom water collection tank, thus efficiently completing the separation of compressed gas and water.

[0038] In this embodiment, the drying unit 300 includes a first adsorption drying tank 301 and a second adsorption drying tank 311. For example... Figure 1 As shown, in this embodiment of the application, the bottom air inlet of the first adsorption drying tank 301 is connected to a first air inlet electric valve 302, and the air inlet of the first air inlet electric valve 302 is connected to the air outlet of the pressure reducing valve 202; the top air outlet of the first adsorption drying tank 301 is connected to a first air outlet check valve 303, the bottom air outlet of the first adsorption drying tank 301 is connected to a first pressure relief electric valve 304, the air outlet of the first pressure relief electric valve 304 is provided with a first silencer 305, and the top emergency exhaust port of the first adsorption drying tank 301 is provided with a third safety valve 306.

[0039] In this embodiment, the bottom air inlet of the second adsorption drying tank 311 is connected to a second air inlet electric valve 312, and the air inlet of the second air inlet electric valve 312 is connected to the air outlet of the pressure reducing valve 202; the top air outlet of the second adsorption drying tank 311 is connected to a second air outlet check valve 313, the bottom air outlet of the second adsorption drying tank 311 is connected to a second pressure relief electric valve 314, the air outlet of the second pressure relief electric valve 314 is provided with a second silencer 315, and the top emergency exhaust port of the second adsorption drying tank 311 is provided with a fourth safety valve 316.

[0040] In this embodiment, the adsorption drying unit 300 is equipped with two adsorption drying tanks, a first adsorption drying tank 301 and a second adsorption drying tank 311, which operate alternately (the adsorption regeneration cycle is set to 20 minutes, adjustable). When the first adsorption drying tank 301 is performing adsorption drying, the second adsorption drying tank 311 is in a depressurization and regeneration state, and vice versa. The first adsorption drying tank 301 and the second adsorption drying tank 311 are filled with high-efficiency adsorption material, consisting of a lower layer of alumina and an upper layer of water-absorbing molecular sieve (volume ratio of 5:1, adjustable as needed), which adsorbs moisture to obtain dry compressed air.

[0041] In some specific embodiments, the alumina of this application is spherical particles with a diameter of 1 mm to 2 mm, a pore volume ≥ 0.45 mL / g, and a specific surface area ≥ 300 m². 2 / g, the alumina selected in this application embodiment has a strong affinity for water and has a deep drying effect on air containing trace amounts of moisture.

[0042] In some specific embodiments, the molecular sieve selected in this application consists of spherical particles with an average diameter of 1.7 mm to 2.5 mm, and has uniform micropores with a pore size comparable to that of water molecules. It has a static water adsorption rate of ≥27% and can efficiently dry moisture in compressed air.

[0043] The compressed air supply device in this embodiment uses highly hygroscopic activated alumina and strongly absorbent molecular sieves, resulting in uniform shape and size, high strength, high output dew point, low dust generation, and long service life. Furthermore, the device, through its system structure and the selection of high-quality switching valves, achieves automated operation via a control system, eliminating the need for manual intervention and improving both work efficiency and safety.

[0044] In this application, the first intake electric valve 302 and the second intake electric valve 312 control the entry of compressed air, and the first outlet one-way valve 303 and the second outlet one-way valve 313 ensure the unidirectional flow of dry air; the first pressure relief electric valve 304 and the second pressure relief electric valve 314 are used to introduce pressure relief gas during the regeneration stage; the first silencer 305 and the second silencer 315 are used to reduce system noise; the first safety valve 103 and the second safety valve 203 are used to automatically release pressure when the system is over-pressured to ensure the safety of the adsorption drying system.

[0045] In some embodiments, the first adsorption drying tank 301 and the second adsorption drying tank 311 in this application are provided with connecting pipelines at their tops, and a system electric valve 310 is provided on the connecting pipelines. The first adsorption drying tank 301 and the second adsorption drying tank 311 share the system electric valve 310. The system electric valve 310 is normally open and adjustable, and can flow in both directions. It is used to automatically adjust and switch the amount of desorption regeneration gas (adsorption gas amount with regeneration gas consumption ≤ 10%) between the two drying tanks.

[0046] In some embodiments, the air outlets of the first outlet check valve 303 and the second outlet check valve 313 are combined into a compressed air outlet line, which is then sent to a filtration device for filtration. In this embodiment, a primary filter 320 and a secondary filter 330 are installed on the compressed air outlet line to filter the compressed air. In some specific embodiments, the primary filter 320 uses a Class C filter element to remove impurities ≥1μm from the gas (mainly fine particles generated by adsorbent desorption and regeneration); the secondary filter 330 uses a Class A filter element to remove impurities ≥0.01μm from the gas (mainly fine dust generated by adsorbent desorption and regeneration).

[0047] In this application, while the first adsorption drying tank 301 performs adsorption drying, the second adsorption drying tank 311 undergoes a regeneration mode: compressed air enters the first adsorption drying tank 301 through the first inlet electric valve 302, and most of the adsorbed compressed air is discharged through the first outlet one-way valve 303, and then sequentially passes through the primary filter 320 and the secondary filter 330; simultaneously, a small portion of the compressed air adsorbed in the first adsorption drying tank 301 is discharged into the second adsorption drying tank 311 through the two-way system electric valve 310 for depressurization and regeneration, and the regenerated compressed air is sequentially discharged through the second depressurization electric valve 314 and the second silencer 315; the first adsorption drying tank 301 completes one adsorption cycle. At the same time, the adsorption drying unit 300 switches to the second adsorption drying tank 311 for adsorption drying, while the first adsorption drying tank 301 enters the desorption and regeneration mode: compressed air enters the second adsorption drying tank 311 from the second inlet electric valve 312, and most of the adsorbed compressed air is discharged from the second outlet one-way valve 313, and then discharged through the first-stage filter 320 and the second-stage filter 330 in sequence; at the same time, a small portion of the compressed air adsorbed from the second adsorption drying tank 311 is discharged into the first adsorption drying tank 301 from the two-way system electric valve 310 for depressurization and desorption, and the desorbed and regenerated compressed air is discharged through the first depressurization electric valve 304 and the first silencer 305 in sequence; this cycle repeats repeatedly.

[0048] The adsorption drying unit 300 of this application is heatless and energy-saving. The adsorption compressed air in the adsorption drying tank uses the micropores of the desiccant material itself to adsorb water molecules in the air through capillary action. At the same time, it uses depressurization desorption and heat recovery from adsorption to remove the adsorbed moisture. There is no need to consume heat source energy or vacuum desorption energy, and the system has a significant energy saving effect.

[0049] Working method: Air is compressed by the air compression unit 100 and then pressure-stabilized and dehydrated by the pressure-stabilizing and dehydration unit 200. After being depressurized to the required pressure range, it enters the adsorption drying unit 300. The first inlet electric valve 302 is opened and the first pressure relief electric valve 304 is closed. The gas enters the first adsorption drying tank 301 from the bottom for adsorption and drying. After being adsorbed and dried from bottom to top in the first adsorption drying tank 301, the gas is discharged from the top of the first adsorption drying tank 301 through the first outlet check valve 303. Then it is filtered by the first-stage filter 320 and the second-stage filter 330. The filtered, dry and clean compressed air is delivered to the designated oil and gas recovery device system.

[0050] While the first adsorption drying tank 301 adsorbs moisture, the second adsorption drying tank 311 undergoes desorption and regeneration.

[0051] The analysis mode is as follows: the first intake electric valve 302 is closed, the first depressurization electric valve 304 is opened, and part of the compressed gas after adsorbing moisture in the first adsorption drying tank 301 enters the second adsorption drying tank 311 through the system electric valve 310 to remove the adsorbed moisture by depressurization and desorption and heating by residual heat of adsorption. The gas after analysis and regeneration is discharged through the second depressurization electric valve 314 and the second silencer 315 in sequence.

[0052] Similarly, when compressed air is filtered, pressure-stabilized, dehydrated, and reduced to the required pressure range, it enters the adsorption drying unit 300. The second inlet electric valve 312 is opened, and the second pressure relief electric valve 314 is closed. Gas enters the second adsorption drying tank 311 from the bottom for adsorption drying. After being adsorbed and dried from bottom to top in the second adsorption drying tank 311, the gas is discharged from the top of the second adsorption drying tank 311 through the second outlet check valve 313, and then filtered through the primary filter 320 and the secondary filter 330. The filtered, dry, and clean compressed air... Air is delivered to the designated oil and gas recovery system; while the second adsorption dryer 311 adsorbs moisture, the first adsorption dryer 301 enters the desorption and regeneration mode, the second air inlet electric valve 312 is closed, and the second pressure relief electric valve 314 is opened. Part of the compressed gas after the second adsorption dryer 311 adsorbs moisture enters the first adsorption dryer 301 through the system electric valve 310 to remove the adsorbed moisture by depressurization and heat up the adsorption residual heat. The gas after desorption and regeneration is discharged through the first pressure relief electric valve 304 and the first silencer 305 in sequence.

[0053] As can be seen from the structure of this application, the compressed air supply device for oil and gas recovery in this embodiment can achieve efficient drying of compressed air. This application employs a three-stage filter and highly efficient, regenerable adsorption material, which can quickly and effectively remove impurities and moisture from the compressed air, improving the dryness of the gas. The adsorption drying unit uses dual tanks working alternately, improving drying efficiency while reducing energy consumption. The compressed air supply device of this application ensures the safety and reliability of the system by setting up a three-stage safety valve and a three-stage automatic drain, and the silencer effectively reduces system noise, improving the working environment.

[0054] The compressed air supply device for oil and gas recovery in this application has a wide range of applications and can be used with various types of air compressors. It can meet the operational needs of oil and gas recovery devices in specific situations such as oil depots and docks where there is no instrument air or nitrogen source.

[0055] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0056] The compressed air supply device for oil and gas recovery provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A compressed air supply device for oil and gas recovery, characterized in that, It includes an air compression unit (100), which includes an air compressor (101). A pressure-stabilizing and dehydrating unit (200) includes a dehydration tank (201), the air inlet of which is connected to the air outlet of the air compressor (101) via a connecting pipe; and a pressure reducing valve (202) is provided at the air outlet of the dehydration tank (201). The adsorption drying unit (300) includes a first adsorption drying tank (301) and a second adsorption drying tank (311) arranged in parallel. The air inlets of the first adsorption drying tank (301) and the second adsorption drying tank (311) are respectively connected to the pressure reducing valve (202). The compressed air adsorbed by the first adsorption drying tank (301) and the second adsorption drying tank (311) is filtered by the filter device and then sent out.

2. The compressed air supply device for oil and gas recovery according to claim 1, characterized in that, The air compression unit (100) includes a first filter (102), the inlet of which is connected to the outlet of the air compressor (101), and the outlet of which is connected to the inlet of the dewatering tank (201); and / or, The air compression unit (100) includes a first safety valve (103), which is disposed at the emergency discharge port of the air compressor (101); and / or, The air compression unit (100) includes a first drain (104), which is disposed on the liquid outlet line at the bottom of the air compressor (101).

3. The compressed air supply device for oil and gas recovery according to claim 2, characterized in that, The air compression unit (100) includes a second drain (105), which is disposed on the bottom outlet line of the first filter (102).

4. The compressed air supply device for oil and gas recovery according to claim 2, characterized in that, The first filter (102) is used to filter particles with a particle size ≥1μm in the gas.

5. The compressed air supply device for oil and gas recovery according to claim 1, characterized in that, The pressure-stabilizing and dewatering unit (200) includes a second safety valve (203), which is located at the emergency discharge outlet of the dewatering tank (201); and / or, The pressure-stabilizing and dewatering unit (200) includes a third drain (204), which is connected to the outlet of the dewatering tank (201); and / or, The pressure-stabilizing dewatering unit (200) includes a pressure transmitter (205), which is installed on the connecting pipeline between the air outlet of the dewatering tank (201) and the air inlet of the pressure reducing valve (202); and / or, The pressure-stabilizing dewatering unit (200) includes a pressure gauge (206), which is located on the top of the dewatering tank (201).

6. The compressed air supply device for oil and gas recovery according to claim 1, characterized in that, The adsorption drying unit (300) further includes a first inlet electric valve (302) and a second inlet electric valve (312); the first inlet electric valve (302) is disposed between the air inlet of the first adsorption drying tank (301) and the air outlet of the pressure reducing valve (202); the second inlet electric valve (312) is disposed between the air inlet of the second adsorption drying tank (311) and the air outlet of the pressure reducing valve (202); and / or, The adsorption drying unit (300) further includes a first exhaust check valve (303) and a second exhaust check valve (313); the first exhaust check valve (303) is located at the top exhaust port of the first adsorption drying tank (301), and the second exhaust check valve (313) is located at the top exhaust port of the second adsorption drying tank (311); and / or, The adsorption drying unit (300) further includes a first pressure relief electric valve (304) and a second pressure relief electric valve (314); the first pressure relief electric valve (304) is disposed at the bottom outlet of the first adsorption drying tank (301), and the second pressure relief electric valve (314) is disposed at the bottom outlet of the second adsorption drying tank (311); and / or, The adsorption drying unit (300) further includes a third safety valve (306) and a fourth safety valve (316); the third safety valve (306) is located at the top emergency discharge port of the first adsorption drying tank (301), and the fourth safety valve (316) is located at the top emergency discharge port of the second adsorption drying tank (311).

7. The compressed air supply device for oil and gas recovery according to claim 6, characterized in that, The filtration device in the adsorption drying unit (300) includes a primary filter (320) and a secondary filter (330) arranged in series. The air inlet of the primary filter (320) is connected to the first exhaust check valve (303) and the second exhaust check valve (313), respectively.

8. The compressed air supply device for oil and gas recovery according to claim 7, characterized in that, The primary filter (320) is used to remove particles with a diameter ≥1μm from the gas; the secondary filter (330) is used to remove particles with a diameter ≥0.01μm from the gas.

9. The compressed air supply device for oil and gas recovery according to claim 1, characterized in that, A system electric valve (310) is provided between the first adsorption drying tank (301) and the second adsorption drying tank (311). The system electric valve (310) is used to adjust and switch the gas flow rate used for desorption between the first adsorption drying tank (301) and the second adsorption drying tank (311).

10. The compressed air supply device for oil and gas recovery according to claim 1, characterized in that, The first adsorption drying tank (301) and the second adsorption drying tank (311) are respectively filled with adsorption materials, the adsorption materials including alumina in the lower layer and water-absorbing molecular sieve in the upper layer of alumina.

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