CN201055814Y - Cyclone gas-liquid separator with automatic oil-gas discharge function - Google Patents

Abstract

The cyclone gas-liquid separator with automatic oil-gas discharge is used in oil-gas separation of crude oil. Comprises a tank body, wherein the bottom of the tank body is provided with a sewage draining outlet, and the middle part of the tank body is provided with an inlet. The tank body is internally provided with a swirler and a gas phase inlet. Is characterized in that: the top of the tank body is fixed with a gas phase automatic discharge device which is connected with a gas phase discharge pipeline, and the gas phase discharge pipeline is connected with a gas phase outlet constant pressure flow control valve. The lower part of the tank body is connected with a liquid phase discharge pipeline, the liquid phase discharge pipeline is connected with an automatic liquid phase discharge device, and the automatic liquid phase discharge device is connected with a constant-pressure flow control valve of a liquid phase outlet. The effect is as follows: the gas-liquid separation is thorough, no external power is needed for automatic discharge, the structure volume is small, and the operation cost is low. The automatic discharging device has the advantages that the function of improving the gas-liquid separation effect and automatically discharging is achieved, the automatic discharging device can be detached and adjusted, the automatic discharging device can adapt to gas-liquid separation with different density differences, and the automatic discharging device is particularly suitable for natural gas production occasions.

Description

Oil and gas automatic discharge cyclone gas-liquid separator

technical field

The utility model relates to the technical field of oil production gathering and transportation in an oil field, in particular to crude oil and gas separation equipment, which is a separator with an automatic gas and liquid discharge device.

Background technique

At present, oil and gas separation equipment is widely used to separate crude oil from natural gas during oil production, gathering and transportation. Although the existing oil-gas cyclone has good oil-gas separation effect, the separator itself cannot realize the automatic control of the exhaust and liquid discharge process. The Chinese patent notification number is CN1295024C, which provides a high-efficiency self-adjusting cyclone gas-liquid separator. Automatic control generally needs auxiliary systems such as automatic instrumentation devices to realize, the technology is complicated, the cost is high, and maintenance is troublesome. There are liquid level automatic control separators that do not need to be equipped with automatic instruments. The Chinese patent announcement number is CN1242826C. The liquid level automatic control integrated gas-liquid separator adopts the non-airtight buoy design, and uses the buoyancy to move up or down the liquid discharge valve stem connected with the buoy to control the liquid discharge speed and achieve automatic discharge. liquid purpose. The buoy used in this separator is relatively large, occupying most of the space of the separator, and is more suitable for the separation of larger droplets. When the requirements for gas-liquid separation are high and internal separation accessories need to be improved, it is not easy to achieve; when there is a lot of dirt in the buoy, the buoyancy of the buoy will be reduced, affecting the effect of automatic liquid discharge; there is no automatic control of gas discharge, when the separator When the inner liquid level is too high, it is easy to cause the gas to carry out the liquid; the hollow sphere is used to realize automatic liquid drainage, and the sphere is difficult to process and cannot be adjusted in volume.

The automatic discharge device in the existing cyclone gas-liquid separator basically discharges the fluid by utilizing signal conversion and automatic instrument system or manually controlling the separator. In the existing integrated design of gas-liquid separation and liquid level control, the inside of the separator uses a buoy that is basically the same volume as the separator, and the separation is performed only by the difference in gas-liquid specific gravity, which cannot effectively separate small droplets. The prior art only controls when the gas phase in the separator enters the liquid phase, but does not control the liquid entering the gas phase when the liquid level is high.

Utility model content

The purpose of this utility model is to provide a cyclone gas-liquid separator with automatic discharge of oil and gas, aiming at the deficiencies of the prior art above, to design a detachable and assembled automatic discharge device and a separator with a cyclone inside. device. This kind of separator does not need automatic instruments to control the automatic discharge of gas and liquid, so as to meet the high requirements of crude oil gas-liquid separation effect; the gas phase and liquid phase must not carry each other, especially the field requirements that the liquid phase cannot overflow from the gas phase outlet, and has simple manufacturing process, Low cost, easy to install and maintain.

The technical scheme adopted by the utility model is: the cyclone gas-liquid separator for automatic discharge of oil and gas, including a tank body with a sewage outlet at the bottom of the tank body and an inlet in the middle of the tank body. There is a cyclone and a gas phase inlet in the tank. It is characterized in that: a gas phase automatic discharge device is fixed on the top of the tank body, the gas phase automatic discharge device is connected with a gas phase discharge pipeline, and the gas phase discharge pipeline is connected with a gas phase outlet constant pressure flow control valve. The lower part of the tank body is connected with a liquid phase discharge pipeline, and the liquid phase discharge pipeline is connected with a liquid phase automatic discharge device, and the liquid phase automatic discharge device is connected with a liquid phase outlet constant pressure flow control valve.

In order to facilitate liquid discharge during maintenance, an auxiliary liquid discharge pipe is connected between the liquid phase discharge pipeline and the liquid phase outlet constant pressure flow control valve, and there is a valve on the auxiliary liquid discharge pipe.

The structure of the constant pressure flow control valve is: including a cone flange, a cone head, a spring, a valve body, a nozzle, a nozzle seat and a flange, the center hole of the cone flange is a tapered hole, and there is a cone Head, tapered flange The tapered hole is the same as the taper of the tapered head. There is a cylindrical valve body between the tapered flange and the flange. There is a compression spring in the valve body. The inner thread of the center hole of the flange is connected with a nozzle seat. A nozzle is arranged in the nozzle seat, and the nozzle seat is threadedly connected with the nozzle. The center hole of the nozzle is tapered. The spring controls the pressure and the nozzle controls the flow. The constant pressure flow control valve is used to control the gas phase. When the pressure difference between the tank internal pressure and the downstream gas phase system pressure is large, the exhaust pressure and exhaust flow are controlled to prevent the pressure in the tank from falling sharply due to the large pressure difference when exhausting. The normal discharge work of the separator; the constant pressure flow control valve is used to control the liquid phase. When the pressure difference between the tank body pressure and the downstream liquid phase system pressure is large, control the tank body discharge pressure and flow rate to prevent the liquid phase from being caused by a large pressure difference. The adjustable plunger in the liquid phase automatic discharge device cannot float normally. The predetermined working pressure of the gas-phase or liquid-phase constant pressure control valve should be lower than the minimum working pressure in actual production in the tank, and higher than the pressure of the gas-liquid phase system connected to the tank. When the pressure inside the tank is close to the pressure of the downstream gas phase or liquid phase system, this valve can be omitted to simplify the separation process.

The gas phase automatic discharge device includes a flange, a valve seat, a valve cover and an adjustable plunger. The valve seat is connected to the inner hole of the flange, and the valve seat inner hole has a tapered surface. The valve cover is connected on the valve seat. The valve cover is cylindrical, with sieve holes evenly distributed on the wall of the valve cover and bottom holes at the bottom. Inside the valve housing is an adjustable plunger. The structure of the adjustable plunger is: one end of the cylindrical hollow cylinder is threaded with Versailles, and the other end is connected with a plug. The end of Versailles is a vertebral body, and the taper of the vertebral body is the same as that of the taper surface of the inner hole of the Versailles seat. According to the buoyancy of the adjustable plunger required on site, the size of the space in the hollow cylinder can be adjusted to change the buoyancy of the adjustable plunger.

The internal structure of the liquid phase automatic discharge device is basically the same as that of the gas phase automatic discharge device. The difference is that the liquid phase automatic discharge device has a closed cylinder fixed on the flange, and the side wall of the closed cylinder is connected to the liquid phase discharge pipeline. The liquid can be stored in the airtight cylinder, and the liquid enters the valve cover, and the adjustable plunger can be suspended on the liquid surface. Another difference is that the installation direction of the liquid phase automatic discharge device is opposite to that of the gas phase automatic discharge device. In addition, the size of the liquid phase automatic discharge device and the gas phase automatic discharge device can be designed according to the different contents of the gas and liquid phases, so as to be more conducive to the smooth discharge of the gas and liquid phases.

The working process of the oil and gas automatic discharge cyclone gas-liquid separator:

When the crude oil containing natural gas enters the tank from the inlet, it flows into the cyclone. The cyclone rotates at high speed to separate the natural gas from the crude oil. The separated natural gas rises to the top of the tank through the gas phase introduction port, and is discharged through the gas phase automatic discharge device.

The separated crude oil flows down the tank wall to the bottom. When the separated crude oil accumulates to a certain height, it enters the closed cylinder of the liquid phase automatic discharge device from the liquid phase discharge pipe. After the liquid phase automatic draining device enters the liquid, it passes through the sieve hole of the valve cover and enters the valve cover. The adjustable plunger gradually leaves the valve seat due to buoyancy, so that the crude oil is discharged through the tapered hole of the valve seat. When the liquid level of the tank gradually decreases until no liquid enters the liquid-phase automatic liquid draining device, the adjustable plunger will drop along with the liquid level until the valve seat is blocked. Repeat this to complete the automatic draining task.

When the liquid level in the tank is too much to drain, the liquid level rises to the lower part of the gas phase automatic discharge device and enters the valve cover, the adjustable plunger floats up with the liquid level, and gradually blocks the tapered hole of the valve seat. The internal pressure of the tank rises, which can speed up the liquid discharge; when the tank is full of liquid, the adjustable plunger will completely block the valve seat, seal the gas outlet, and prevent the accident of crude oil overflowing from the gas phase outlet.

The height of the cyclone should be at the lower part of the tank inlet, and the gas phase inlet should be higher than the tank inlet to achieve the best oil-gas separation effect.

The beneficial effects of the utility model: the automatic oil and gas discharge cyclone gas-liquid separator can make the gas-liquid separation more thorough, the structure of the gas-liquid automatic discharge device is simple and small in size, no external power is required for operation, the operation cost is low, and the high price can be omitted , Electrified automatic instrument system with complex structure and high operation cost. It has the advantages of a signal conversion automation system and a large buoy type liquid level automatic control integrated separator, which can improve the gas-liquid separation effect and automatically discharge the function, and the automatic discharge device is detachable and adjustable, and can adapt to gas-liquid separation with different density differences , especially suitable for natural gas production occasions.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the overall structure of a cyclone gas-liquid separator with automatic discharge of oil and gas.

Fig. 2 is a schematic cross-sectional view of the structure of the constant pressure flow control valve.

Fig. 3 is a schematic cross-sectional view of the structure of the gas phase automatic discharge device.

In the figure, 1. Sewage outlet, 2. Tank body, 3. Cyclone, 4. Inlet, 5. Gas phase inlet, 6. Gas phase automatic discharge device, 7. Gas phase discharge pipeline, 8. Constant pressure flow control valve, 9. Liquid phase discharge pipeline, 10. Liquid phase automatic discharge device, 11. Auxiliary liquid discharge pipe, 12. Valve, 13. Cone flange, 14. Cone head, 15. Spring, 16. Valve body, 17. Nozzle , 18. Nozzle seat, 19. Flange, 20. Flange, 21. Verseille seat, 22. Verseille cover, 23. Sieve hole, 24. Versailles, 25. Hollow cylinder, 26. Plug, 27. Bottom hole.

Detailed ways

Embodiment 1: Refer to Fig. 1. Oil and gas automatic discharge cyclone gas-liquid separator, the tank body 2 is a vertical airtight tank with a diameter of 1.5 meters and a height of 4 meters. There is a sewage outlet 1 at the bottom of the tank body 2 . There is an inlet 4 with an inner diameter of 80 mm in the middle part of the tank body 2 meters away from the bottom. There is a cyclone 3 in the tank body 2 at 1.5 meters away from the bottom of the tank body. There is a gas phase introduction port 5 in the tank body 2 at a distance of 1.8 meters from the bottom of the tank body. A gas phase automatic discharge device 6 is fixed on the top of the tank body 2 . The gas phase automatic discharge device 6 is connected with a gas phase discharge pipeline 7 with an internal diameter of 50 mm. The gas phase discharge pipeline 7 is connected with a gas phase outlet constant pressure flow control valve 8 . The lower part of the tank body 2 is connected with a liquid discharge pipeline 9 with an inner diameter of 80 mm. The liquid phase discharge line 9 is connected to a liquid phase automatic discharge device 10 . The liquid phase automatic discharge device 10 is connected with a liquid phase outlet constant pressure flow control valve 8 . An auxiliary discharge pipe 11 is connected on the pipeline between the liquid phase discharge pipeline 9 and the liquid phase outlet constant pressure flow control valve 8, and there is a manual valve 12 on the auxiliary liquid discharge pipe.

See Figure 2. The structure of constant pressure flow control valve is made up of cone flange 13 cone head 14 spring 15 valve body 16 nozzle 17 nozzle seat 18 flange 19, the central hole of cone flange 13 is a tapered hole, and its taper is 75 degrees. Taper flange 13 central holes have taper head 14, and the taper of taper flange 13 tapered holes and taper head 14 is identical, also 75 degrees. There is a cylindrical valve body 16 between the tapered flange 13 and the flange 19 . Valve body 16 internal diameter is 60 millimeters. A compression spring 15 is arranged in the valve body 16 . The center hole of the flange 19 is internally threaded with a nozzle seat 18 . Nozzle 17 is arranged in the nozzle seat 18 . The nozzle seat 18 is threadedly connected with the nozzle 17 . The central hole of nozzle 17 is conical, and the minimum diameter of the central hole of nozzle 17 is 10 millimeters.

See Figure 3. The gas phase automatic discharge device 6 includes a flange 20, a valve seat 21, a valve cover 22 and an adjustable plunger. The valve seat 21 is threadedly connected to the inner hole of the flange 20, and the valve seat 21 inner hole has a tapered surface with a taper of 75 degrees. The valve cover 22 is screwed on the valve seat 21. The valve cover 22 is cylindrical, with a diameter of 100 mm and a length of 250 mm. The sieve holes 23 with a diameter of 10 mm are evenly distributed on the wall of the valve cover 22 . There is a bottom hole 27 of 80 millimeters at the bottom of the cover 22. Inside the valve housing 22 is an adjustable plunger. The structure of the adjustable plunger is: one end of the cylindrical hollow cylinder 25 is threaded with a Versailles 24, and the other end is connected with a plug 26. The hollow cylinder 25 has a diameter of 95 mm and a length of 100 mm. The end of Versailles 24 is a vertebral body, and the taper of the vertebral body is 75 degrees, which is the same as the taper of the taper surface of the inner hole of Versailles 21.

See Figure 1. The internal structure of the liquid phase automatic discharge device 10 is basically the same as that of the gas phase automatic discharge device 6, the difference is that the liquid phase automatic discharge device 10 is fixed with a closed cylinder on the flange 20, and the diameter of the closed cylinder is 120mm. mm, length 400 mm. The side wall of the airtight cylinder is connected with the liquid phase discharge line 9. The installation direction of the liquid phase automatic discharge device 10 is opposite to that of the gas phase automatic discharge device 6 .

Claims (5)

1. oil-gas automatic discharging cyclone gas-liquid separator, comprise tank body (2), sewage draining exit (1) is arranged at tank body (2) bottom, there is import (4) at tank body (2) middle part, the gentle phase intake of cyclone (3) (5) is arranged in the tank body (2), it is characterized in that: be fixed with gas phase automatic discharge device (6) at tank body (2) top, gas phase automatic discharge device (6) connects gas phase emission pipeline (7), gas phase emission pipeline (7) is connected with gaseous phase outlet level pressure flow control valve (8), tank body (2) bottom is connected with liquid phase discharge pipe line (9), liquid phase discharge pipe line (9) connects liquid phase automatic discharge device (10), and liquid phase automatic discharge device (10) is connected with liquid phase outlet level pressure flow control valve (8).

2. oil-gas automatic discharging cyclone gas-liquid separator according to claim 1 is characterized in that: be connected with auxiliary discharging tube (11) on the pipeline of liquid phase discharge pipe line (9) and liquid phase outlet level pressure flow control valve (8), on the auxiliary discharging tube valve (12) arranged.

3. oil-gas automatic discharging cyclone gas-liquid separator according to claim 1, it is characterized in that: the structure of described level pressure flow control valve (8) is: comprise awl flange (13), awl end socket (14), spring (15), valve body (16), nozzle (17), nozzle carrier (18) and flange (19), the centre bore of awl flange (13) is a bellmouth, awl end socket (14) is arranged in the centre bore, awl flange (13) bellmouth is identical with the tapering of awl end socket (14), the valve body (16) that cylinder barrel shaped is arranged between awl flange (13) and flange (19), compression spring (15) is arranged in the valve body (16), the centre bore internal thread of flange (19) is connected with nozzle carrier (18), nozzle (17) is arranged in the nozzle carrier (18), nozzle carrier (18) is threaded with nozzle (17), and nozzle (17) centre bore is taper.

4. according to claim 1 or 2 or 3 described oil-gas automatic discharging cyclone gas-liquid separators, it is characterized in that: described gas phase automatic discharge device (6) comprises flange (20), valve seat (21), valve cover (22) and regulating plunger, valve seat (21) is connected flange (20) endoporus, valve seat (21) endoporus has a conical surface, valve cover (22) is connected on the valve seat (21), valve cover (22) is a tubular, be evenly equipped with sieve aperture (23) on valve cover (22) wall, bottom outlet (27) is arranged at the bottom, a regulating plunger is arranged in valve cover (22), the structure of regulating plunger is: the threaded one end at cylindric hollow cylinder (25) is connected with Versailles (24), the other end is connected with plug (26), the end of Versailles (24) is a centrum, and the tapering of centrum is identical with the tapering of valve seat (21) the endoporus conical surface.

5. according to claim 1 or 2 or 3 described oil-gas automatic discharging cyclone gas-liquid separators, it is characterized in that: described liquid phase automatic discharge device (10) is to be fixed with an airtight cylinder on flange (20), airtight cylinder side wall connects liquid phase discharge pipe line (9), and the installation direction of liquid phase automatic discharge device (10) is opposite with the installation direction of gas phase automatic discharge device (6).

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