CN211450353U

CN211450353U - Oil-gas separation system of natural gas filling station

Info

Publication number: CN211450353U
Application number: CN201922365348.1U
Authority: CN
Inventors: 蒋志飞; 江洪; 罗伟
Original assignee: Chongqing Endurance Industry Stock Co Ltd
Current assignee: Chongqing Endurance Industry Stock Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-09-08
Anticipated expiration: 2029-12-25

Abstract

An oil-gas separation system of a natural gas filling station comprises two hydraulic pressure cylinders, wherein an air inlet pipeline of each hydraulic pressure cylinder is connected with a natural gas inlet header pipe, an air outlet pipeline is connected with a pressure gas pipeline, the downstream end of the pressure gas pipeline is connected with an air inlet of a buffer tank, an air outlet of the buffer tank is connected with the gas pipeline, the gas pipeline at the downstream of the buffer tank is connected with the compressed natural gas inlet header pipe through an oil-gas separation device for separating oil mist in compressed natural gas, the inner cavity of the oil-gas separation device is divided into an oil-gas separation cavity and an oil accumulation cavity by a partition plate, the oil-gas separation cavity is provided with an air inlet and an air outlet, the air inlet is connected with the gas pipeline at the upstream, the air outlet is connected with the compressed natural gas inlet header pipe at the downstream, a coalescence filter element is arranged in the oil-gas separation, the oil accumulation cavity is provided with an oil discharge hole, and the oil discharge hole is connected with an air inlet pipeline of the hydraulic pressure cylinder through a return pipeline.

Description

Oil-gas separation system of natural gas filling station

Technical Field

The utility model relates to a natural gas air entrainment field, concretely relates to oil-gas separation system of natural gas filling station.

Background

Before the natural gas enters a gas filling machine of a gas filling station, the gas pressure of the natural gas is increased to 20-25MPa by utilizing a hydraulic pressure increasing device, so as to ensure that the natural gas added into the gas storage tank of the automobile has enough pressure, when the natural gas filling station adopts a hydraulic compressor to compress the natural gas, because the hydraulic oil is directly contacted with the natural gas in the hydraulic compressor, certain hydraulic oil can be mixed in the compressed high-pressure gas, in order to solve the problem, a buffer tank is arranged on a gas transmission pipeline of the compressed natural gas at present, the buffer action of the buffer tank is utilized to lead the compressed natural gas to be buffered and stabilized in the inner cavity of the buffer tank, and meanwhile, compressed natural gas is buffered in the tank, so that mixed large oil drops are settled at the bottom of the buffer tank, primary separation of oil and gas is realized, and the natural gas is output through an outlet at the upper end of the buffer tank. However, the natural gas generates heat in the compression process, so that the hydraulic oil generates heat to generate oil mist mixed in the compressed natural gas, the oil mist mixed in the compressed natural gas cannot be cooled in a short time to form oil drops to be separated from the natural gas after entering the buffer tank, and a considerable part of the oil mist can be mixed in the compressed natural gas to be output and added into an air storage tank of a vehicle. Particularly, when the natural gas filling station fills gas in multiple vehicles simultaneously, the flow of the compressed natural gas output from the buffer tank is increased, the time for the compressed natural gas to pass through the buffer tank is shortened, oil mist mixed in the compressed natural gas is more difficult to form oil drops to be separated from the natural gas, and the oil mist is rapidly output from the buffer tank along with the gas flow and is added into a gas storage tank of the vehicle. In case the oil mist gets into the gas holder of vehicle, form fluid through the cooling and save in the gas holder, accumulate in the sun and moon and gather a large amount of fluid and occupy gas holder space, make the gas storage capacity of vehicle gas holder reduce gradually, influence the continuation of the journey distance of vehicle, this kind of impure natural gas of vehicle long-term use moreover can produce harmful effects, damage even to a great deal of important parts such as the engine system of vehicle.

Obviously, the prior natural gas filling station only uses the buffer tank to replace an oil-gas separation filter to separate oil mist mixed in the compressed natural gas, and cannot thoroughly solve the problems, the bottom of the buffer tank does not have an additional oil storage space, the separated hydraulic oil is accumulated in the shell of the buffer tank, once the shell is saturated, if the hydraulic oil in the shell of the buffer tank is not discharged in time, the oil-gas separation filter fails, not only can the oil-gas separation be carried out, but also the due buffer function of the buffer tank can not be realized, even safety accidents are generated, only the content of the hydraulic oil in the buffer tank can be noticed at any time, the oil is discharged in time, the workload is increased by phase change, and the oil drain port of the buffer tank is directly connected to the sewage disposal pool, and the discharged hydraulic oil is not recycled, so that a large amount of hydraulic oil of a hydraulic pressurization system of the natural gas station is consumed, and the normal operation of the hydraulic pressurization system can be ensured only by frequently adding the hydraulic oil.

Disclosure of Invention

The utility model aims at the not enough that prior art corresponds, provide a natural gas filling station's oil-gas separation system, not only can make the oil mist that mixes in the CNG separate completely, but also can retrieve the hydraulic oil that separates, carry out reuse, the loss of the hydraulic oil of the hydraulic supercharging system of the natural gas filling station that has significantly reduced.

The utility model aims at adopting the following scheme to realize: an oil-gas separation system of a natural gas filling station comprises two hydraulic pressure cylinders, wherein an air inlet pipeline of each hydraulic pressure cylinder is connected with a natural gas inlet header pipe, an air inlet one-way valve is arranged on the air inlet pipeline, an air outlet pipeline of each hydraulic pressure cylinder is connected with a pressure gas pipeline, an air outlet one-way valve is arranged on the air outlet pipeline, a hydraulic oil pipeline of each hydraulic pressure cylinder is used for connecting a device for providing hydraulic oil, the downstream end of the pressure gas pipeline is connected with an air inlet of a buffer tank, an air outlet of the buffer tank is connected with the gas pipeline, an oil discharge one-way valve is arranged on an oil discharge pipeline of the buffer tank, the gas pipeline at the downstream of the buffer tank is connected with the compressed natural gas inlet header pipe through an oil-gas separation device for separating oil mist in compressed natural gas, an inner cavity of the oil-gas separation device is divided into an oil-gas separation cavity, the oil-gas separation chamber sets up air inlet, gas outlet, and the gas-supply pipe on the upper reaches is connected to the air inlet in oil-gas separation chamber, and the compressed natural gas transmission house steward in low reaches is connected to the gas outlet in oil-gas separation chamber, set up a coalescence filter core in the oil-gas separation chamber, compressed natural gas gets into the oil-gas separation chamber through the coalescence filter core from the air inlet in oil-gas separation chamber, gets into compressed natural gas transmission house steward from the gas outlet, the oil pocket sets up the oil drain hole, and the oil drain hole passes through the inlet line connection of return line and hydraulic pressure cylinder.

And an oil discharge pipeline of the buffer tank is communicated with a return pipeline.

The backflow pipeline is provided with a control valve, the backflow pipeline at the upstream end of the control valve is connected with an oil drainage pipe, and the oil drainage pipe is provided with a stop valve.

The baffle is supported by locating the interior compression spring of long-pending oil pocket, and this compression spring's upper end and baffle contact, and the lower extreme contacts with the chamber bottom of long-pending oil pocket.

The baffle up end is equipped with the recess, the recess is the conical surface recess, and the conical surface of this conical surface recess is the water conservancy diversion face that collects hydraulic oil, the oilhole is located the tank bottom of recess, and the aperture of this oilhole is 5 ~ 30 mm.

The upper end of the coalescence filter element is fixedly connected with the top of the oil-gas separation cavity and communicated with the air inlet of the oil-gas separation cavity, the lower end of the coalescence filter element is suspended and does not contact with the partition plate, an air passing space is reserved between the outer wall of the coalescence filter element and the inner wall of the oil-gas separation cavity, and the air passing space is communicated with the air outlet of the oil-gas separation cavity.

The oil-gas separation device is characterized in that an upper end cover is arranged at the upper end of the oil-gas separation device, the upper end cover is fixedly connected with the upper end of the oil-gas separation device and is sealed, an air inlet and an air outlet of an oil-gas separation cavity are both arranged on the upper end cover, a lower end cover is arranged at the lower end of the oil-gas separation device, the lower end cover is fixedly connected with the lower end of the oil-gas separation device and is sealed, an oil discharge hole is formed in the lower end cover, and a positioning hole for installing a compression spring is formed in.

The lower terminal surface of upper end cover is equipped with the mounting groove who is used for fixed coalescence filter core, and the air inlet and the mounting groove intercommunication in oil-gas separation chamber, the mounting groove periphery is equipped with a gas ring channel, and the gas outlet and this gas ring channel intercommunication in oil-gas separation chamber.

The natural gas inlet main pipe is provided with a non-return one-way valve for preventing the hydraulic oil from flowing back.

The utility model discloses contain following beneficial effect: the gas transmission pipe at the downstream of the buffer tank is connected with a compressed natural gas transmission main pipe through an oil-gas separation device for separating oil mist in the compressed natural gas, the inner cavity of the oil-gas separation device is divided into an oil-gas separation cavity at the upper part and an oil accumulation cavity at the lower part by a partition plate, the baffle plate is provided with an oil passing hole, the oil-gas separation cavity is provided with an air inlet and an air outlet, the air inlet of the oil-gas separation cavity is connected with an upstream gas transmission pipe, the air outlet of the oil-gas separation cavity is connected with a downstream compressed natural gas transmission main pipe, the oil-gas separation cavity is internally provided with a coalescent filter element, the compressed natural gas enters the oil-gas separation cavity from the gas inlet of the oil-gas separation cavity through the coalescent filter element and enters the compressed natural gas transmission main pipe from the gas outlet, the oil accumulation cavity is provided with an oil discharge hole, the oil discharge hole is connected with an air inlet pipeline of the hydraulic pressure cylinder through a return pipeline, and the return pipeline is provided with a return one-way valve. After compressed natural gas mixed with oil mist enters a coalescence filter element of an oil-gas separation device from an air inlet of an oil-gas separation cavity, the oil mist mixed in the compressed natural gas is coalesced into larger oil drops to be separated from the compressed natural gas, the oil drops drop on the upper end face of a partition plate under the action of gravity and enter an oil accumulation cavity from an oil passing hole of the partition plate, meanwhile, the separated compressed natural gas enters the oil-gas separation cavity from the coalescence filter element and is output through an air outlet of the oil-gas separation cavity, and oil liquid accumulated in the oil accumulation cavity can not enter the oil-gas separation cavity to be mixed with the compressed natural gas due to the action of the partition plate; the oil collected by the oil collecting cavity can be discharged from the oil discharge hole and returns to the hydraulic pressure cylinder through a return pipeline.

And the oil discharge pipeline of the buffer tank is communicated with the return pipeline, and the hydraulic oil separated from the buffer tank can enter the return pipeline through the oil discharge pipeline and finally return to the hydraulic pressure cylinder.

The hydraulic oil recovery device is characterized in that a control valve is arranged on the return pipeline, an oil drainage pipe is connected to the return pipeline at the upstream end of the control valve, a stop valve is arranged on the oil drainage pipe, the stop valve is closed, and the control valve is opened, so that hydraulic oil in the oil-gas separation device and the buffer tank can enter the hydraulic booster cylinder through the return pipeline to be recovered, and hydraulic oil loss is avoided.

The baffle is supported by locating the interior compression spring of long-pending oil pocket, and this compression spring's upper end and baffle contact, and the lower extreme contacts with the chamber bottom of long-pending oil pocket. The compression spring is adopted to support the partition plate, so that the problem of potential safety hazards caused by welding or screw fixation of the partition plate and the inner cavity of the oil-gas separation device can be avoided, and because the partition plate is fixed in the inner cavity of the oil-gas separation device in a welding mode, the cavity wall of the oil-gas separation device can generate obvious changes of organization and performance during welding, the pressure resistance and the actual service life of the oil-gas separation device are reduced, and even explosion can be generated in serious cases, so that the safety of lives and properties is harmed; and fix the baffle in oil-gas separation device's inner chamber through a plurality of screws, can reduce oil-gas separation device's leakproofness, produce easily that the compressed natural gas leaks, cause the potential safety hazard. The compression spring is adopted to support the partition plate, so that the partition plate can move up and down to balance the air pressure of the oil-gas separation cavity and the oil accumulation cavity when the partition plate is subjected to excessive pressure, and the function of protecting the partition plate is achieved.

The groove can collect oil drops to enter the oil accumulation cavity from the oil passing hole, the separated oil drops can quickly enter the oil accumulation cavity from the oil passing hole through the flow guide surface, and the size of the aperture of the oil passing hole is set according to the volume of the oil-gas separation device.

The oil-gas separation device's upper end is equipped with the upper end cover, and upper end cover and oil-gas separation device's upper end fixed connection and sealed, the air inlet of oil-gas separation chamber, gas outlet all set up on the upper end cover, oil-gas separation device's lower extreme is equipped with the lower extreme cover, and the lower extreme fixed connection of lower extreme cover and oil-gas separation device just seals, the oil drain hole sets up on the lower extreme cover, the up end of lower extreme cover is equipped with the locating hole that is used for installing compression spring, is favorable to coalescence filter core, baffle and compression spring's installation.

The lower terminal surface of upper end cover is equipped with the mounting groove who is used for fixed coalescence filter core, and the air inlet and the mounting groove intercommunication in oil-gas separation chamber, the mounting groove periphery is equipped with a gas ring channel, and the gas outlet and this gas ring channel intercommunication in oil-gas separation chamber guarantee the flow balance of the natural gas air current of circulation of oil-gas separation chamber gas outlet and air inlet.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of the oil-gas separation device of the present invention.

Detailed Description

As shown in fig. 1 to 2, an oil-gas separation system of a natural gas filling station comprises two hydraulic pressure cylinders 1, wherein an air inlet pipeline 2 of each hydraulic pressure cylinder 1 is connected with a natural gas inlet manifold 3, and the natural gas inlet manifold 3 is provided with a check valve 31 for preventing natural gas from flowing back from the natural gas inlet manifold 3 during compression. An air inlet one-way valve 4 is arranged on an air inlet pipeline 2 of each hydraulic pressure cylinder 1, an air outlet pipeline 5 of each hydraulic pressure cylinder 1 is connected with a pressure gas conveying pipeline 6, an air outlet one-way valve 7 is arranged on the air outlet pipeline 5, a liquid level sensor 33 is arranged on the upper portion of an inner cavity of each hydraulic pressure cylinder 1, a hydraulic oil pipeline 8 of each hydraulic pressure cylinder 1 is used for connecting a device for providing hydraulic oil, the downstream end of the pressure gas conveying pipeline 6 is connected with an air inlet of a buffer tank 9, an air outlet of the buffer tank 9 is connected with a gas conveying pipeline 10, a liquid level sensor 32 is arranged in the buffer tank 9 and used for monitoring the liquid level of the hydraulic oil deposited at the bottom of the buffer tank 9, an oil discharge one-way valve 12 is arranged on an oil discharge pipeline 11 of the buffer tank 9, the gas conveying pipeline 10 at the downstream of the buffer tank 9 is connected with a compressed, the inner chamber of the oil-gas separation device 13 is divided into an oil-gas separation chamber 16 on the upper portion and an oil accumulation chamber 17 on the lower portion by a partition plate 15, the partition plate 15 is provided with an oil passing hole 18, the upper end face of the partition plate 15 is provided with a groove 27, the groove 27 is a conical groove, the conical surface of the conical groove is a flow guide surface for collecting hydraulic oil, the oil passing hole 18 is located at the bottom of the groove 27, and the aperture of the oil passing hole 18 is 5-30 mm. The groove 27 can collect oil drops to enter the oil collecting cavity 17 from the oil passing hole 18, the separated oil drops can quickly enter the oil collecting cavity 17 from the oil passing hole 18 through the flow guide surface, and the size of the aperture of the oil passing hole 18 is set according to the volume of the oil-gas separation device 13. The partition plate 15 is supported by a compression spring 26 arranged in the oil accumulation cavity 17, the upper end of the compression spring 26 is in contact with the partition plate 15, the lower end of the compression spring 26 is in contact with the cavity bottom of the oil accumulation cavity 17, the partition plate 15 is supported by the compression spring 26, and the problems caused by welding and fixing or screwing the partition plate 15 and the inner cavity of the oil-gas separation device 13 can be avoided; and fix the baffle in the inner chamber of oil-gas separation device 13 through a plurality of screws, can reduce oil-gas separation device 13's leakproofness, produce easily that the compressed natural gas leaks, seriously influence oil-gas separation device 13's operating mass with rated load. The compression spring 26 is adopted to support the partition plate 15, so that the partition plate 15 can move up and down when being pressed, the air pressure of the oil-gas separation cavity 16 and the oil accumulation cavity 17 is balanced, and the function of protecting the partition plate 15 is achieved. The gas-oil separation chamber 16 sets up air inlet, gas outlet, and the gas-supply pipe 10 on the upper reaches is connected to the air inlet of gas-oil separation chamber 16, and the compressed natural gas main pipe 14 on the low reaches is connected to the gas outlet of gas-oil separation chamber 16, set up a coalescence filter element 19 in the gas-oil separation chamber 16, the upper end of coalescence filter element 19 and the chamber top fixed connection of gas-oil separation chamber 16, and with the air inlet switch-on of gas-oil separation chamber 16, the unsettled and baffle 15 contact of lower extreme of coalescence filter element 19, leave the gas space between the outer wall of coalescence filter element 19 and the inner wall of gas-oil separation chamber 16, the gas space communicates with each other with the gas outlet of gas. The compressed natural gas mixed with oil mist enters the oil-gas separation cavity 16 from an air inlet of the oil-gas separation cavity 16 through the coalescing filter element 19, the oil mist mixed in the compressed natural gas is coalesced into larger oil drops by the coalescing filter element 19 to be separated from the compressed natural gas, the oil drops drop on the upper end face of the partition plate 15 under the action of gravity and enter the oil accumulation cavity 17 from the oil passing hole 18 of the partition plate 15, meanwhile, the separated compressed natural gas enters a gap of the coalescing filter element 19 and enters the compressed natural gas transmission main pipe 14 from an air outlet of the oil-gas separation cavity 16, and due to the action of the partition plate 15, oil liquid in the oil accumulation cavity 17 cannot enter the oil-gas separation cavity 16 again to. The oil accumulation cavity 17 is provided with an oil drain hole 20, the oil drain hole 20 is connected with the air inlet pipeline 2 of the hydraulic pressure cylinder 1 through a return pipeline 21, and the return pipeline 21 is provided with a return one-way valve 22. Since the oil in the oil accumulation chamber 17 cannot form oil mist again, the oil collected in the oil accumulation chamber 17 can be discharged from the oil discharge hole 20 and returned to the hydraulic booster cylinder 1 through the return line 21. The oil discharge pipeline 11 of the buffer tank 9 is also communicated with the return pipeline 21, and the hydraulic oil primarily separated from the buffer tank 9 can also enter the return pipeline 21 through the oil discharge pipeline 11 and finally returns to the hydraulic pressure cylinder 1. A control valve 23 is disposed on the return line 21, and the control valve 23 may be a pneumatic valve or an electromagnetic valve. An oil drain pipe 24 is connected to the return pipeline 21 at the upstream end of the control valve 23, and a stop valve 25 is arranged on the oil drain pipe 24.

In this embodiment, the upper end of the oil-gas separation device 13 is provided with an upper end cover 28, the upper end cover 28 is fixedly connected with and sealed with the upper end of the oil-gas separation device 13, and the air inlet and the air outlet of the oil-gas separation chamber 16 are both arranged on the upper end cover 28. The lower end face of the upper end cover 28 is provided with an installation groove for fixing the coalescence filter element 19, the air inlet of the oil-gas separation cavity 16 is communicated with the installation groove, the upper end of the coalescence filter element 19 is fixed in the installation groove and can be fixed by adopting thread fit or bonding, the periphery of the installation groove is provided with an air passing annular groove 30, the air outlet of the oil-gas separation cavity 16 is communicated with the air passing annular groove 30, and the flow balance of the natural gas flow flowing through the air outlet and the air inlet of the oil-gas separation cavity 16 is ensured. The lower extreme of oil-gas separation device 13 is equipped with lower end cover 29, and lower end cover 29 and oil-gas separation device 13's lower extreme fixed connection and sealed, oil drain hole 20 sets up on lower end cover 29, the up end of lower end cover 29 is equipped with the locating hole that is used for installing compression spring 26, is favorable to coalescence filter core 19, baffle 15 and compression spring 26's installation.

In this embodiment, the downstream end of the oil drain pipe 24 is connected to a device for supplying hydraulic oil, after the stop valve 25 is opened, the hydraulic oil separated from the buffer tank 9 and the oil-gas separation device 13 can return to the device for supplying hydraulic oil through the oil drain pipe 24, the device for supplying hydraulic oil is connected to the hydraulic oil pipeline 8 of each hydraulic pressure cylinder 1 through a directional valve, the two hydraulic pressure cylinders 1 are vertically arranged, the upper part of the inner cavity of each hydraulic pressure cylinder 1 is provided with a liquid level sensor 33 for directional control, the liquid level elevation change in each hydraulic pressure cylinder 1 is monitored, the two hydraulic pressure cylinders 1 are controlled by the directional valve to alternately compress natural gas, the natural gas automatically flows to one hydraulic pressure cylinder 1 at a low pressure from the natural gas inlet manifold 3, after the compression and pressurization are completed in the hydraulic pressure cylinder 1, the natural gas is input into the buffer tank 9 from the pressure gas pipeline 6 through the gas outlet pipeline 5, therefore, the natural gas is compressed alternately, and the continuous compression gas transmission of the natural gas is realized.

When the liquid level sensor 32 at the lower part of the cavity of the buffer tank 9 monitors that the liquid level of the oil collected at the bottom of the cavity of the buffer tank 9 rises to a specified position, the stop valve 25 is closed, the control valve 23 is opened, and along with the alternative compression of the natural gas by the two hydraulic pressure cylinders 1, the hydraulic oil separated from the oil-gas separation device 13 and the buffer tank 9 enters the hydraulic pressure cylinders 1 through the return pipeline 21.

The above only be the utility model discloses a preferred embodiment to be not used for the restriction the utility model discloses, technical personnel in the field are not deviating from the utility model discloses a under the prerequisite of spirit, right the utility model discloses the change of going on all falls into the utility model discloses a protection scope.

Claims

1. The utility model provides a natural gas filling station's oil-gas separation system, includes two hydraulic pressure cylinder (1), and air inlet pipeline (2) and natural gas inlet manifold (3) of each hydraulic pressure cylinder (1) are connected, are equipped with admit air check valve (4) on air inlet pipeline (2), and air outlet pipeline (5) and a pressure boost gas transmission pipeline (6) of each hydraulic pressure cylinder (1) are connected, are equipped with air outlet check valve (7) on air outlet pipeline (5), and hydraulic pressure oil pipeline (8) of each hydraulic pressure cylinder (1) are used for connecting the device that provides hydraulic oil, the air inlet of buffer tank (9) is connected to the low reaches end of pressure boost gas transmission pipeline (6), gas transmission pipe (10) is connected to the gas outlet of buffer tank (9), oil drain pipeline (11) of buffer tank (9) are equipped with oil extraction check valve (12), its characterized in that: the gas transmission pipe (10) at the downstream of the buffer tank (9) is connected with a compressed natural gas transmission main pipe (14) through an oil-gas separation device (13) for separating oil mist in compressed natural gas, the inner cavity of the oil-gas separation device (13) is divided into an oil-gas separation cavity (16) at the upper part and an oil accumulation cavity (17) at the lower part by a partition plate (15), the partition plate (15) is provided with an oil passing hole (18), the oil-gas separation cavity (16) is provided with a gas inlet and a gas outlet, the gas inlet of the oil-gas separation cavity (16) is connected with the gas transmission pipe (10) at the upstream, the gas outlet of the oil-gas separation cavity (16) is connected with the compressed natural gas transmission main pipe (14) at the downstream, a coalescing filter element (19) is arranged in the oil-gas separation cavity (16), and the compressed natural gas enters the oil-gas separation cavity (16) from the, the oil accumulation cavity (17) is provided with an oil discharge hole (20), the oil discharge hole (20) is connected with an air inlet pipeline (2) of the hydraulic pressure cylinder (1) through a return pipeline (21), and the return pipeline (21) is provided with a return one-way valve (22).

2. The gas-oil separation system of a natural gas station of claim 1, wherein: and an oil discharge pipeline (11) of the buffer tank (9) is communicated with a return pipeline (21).

3. The oil-gas separation system of a natural gas station according to claim 1 or 2, characterized in that: the backflow pipeline (21) is provided with a control valve (23), the backflow pipeline (21) at the upstream end of the control valve (23) is connected with an oil drainage pipe (24), and the oil drainage pipe (24) is provided with a stop valve (25).

4. The gas-oil separation system of a natural gas station of claim 1, wherein: the partition plate (15) is supported by a compression spring (26) arranged in the oil accumulation cavity (17), the upper end of the compression spring (26) is in contact with the partition plate (15), and the lower end of the compression spring is in contact with the cavity bottom of the oil accumulation cavity (17).

5. The gas-oil separation system of a natural gas station of claim 1, wherein: the baffle (15) up end is equipped with recess (27), recess (27) are the conical surface recess, and the conical surface of this conical surface recess is the water conservancy diversion face that collects hydraulic oil, cross the tank bottom that oilhole (18) are located recess (27), and the aperture that should cross oilhole (18) is 5 ~ 30 mm.

6. The gas-oil separation system of a natural gas station of claim 1, wherein: the upper end of coalescence filter core (19) and the chamber top fixed connection in oil-gas separation chamber (16), and with the air inlet switch-on in oil-gas separation chamber (16), the lower extreme of coalescence filter core (19) is unsettled not to contact with baffle (15), leave between the outer wall of coalescence filter core (19) and the inner wall in oil-gas separation chamber (16) and cross the gas space, it communicates with each other with the gas outlet in oil-gas separation chamber (16) to cross the gas space.

7. The gas-oil separation system of a natural gas station of claim 1, wherein: the upper end of oil-gas separation device (13) is equipped with upper end cover (28), and upper end cover (28) and the upper end fixed connection of oil-gas separation device (13) and sealed, the air inlet, the gas outlet of oil-gas separation chamber (16) all set up on upper end cover (28), the lower extreme of oil-gas separation device (13) is equipped with lower extreme cover (29), and lower extreme cover (29) and the lower extreme fixed connection of oil-gas separation device (13) and sealed, oil drain hole (20) set up on lower extreme cover (29), the up end of lower extreme cover (29) is equipped with the locating hole that is used for installing compression spring (26).

8. The gas-oil separation system of a natural gas station of claim 7, wherein: the lower terminal surface of upper end cover (28) is equipped with the mounting groove that is used for fixed coalescence filter core (19), and the air inlet and the mounting groove intercommunication of oil-gas separation chamber (16), the mounting groove periphery is equipped with one and crosses gas ring channel (30), and the gas outlet and this of oil-gas separation chamber (16) cross gas ring channel (30) and communicate.

9. The gas-oil separation system of a natural gas station of claim 1, wherein: and the natural gas intake manifold (3) is provided with a check one-way valve (31) for preventing the backflow of hydraulic oil.