CN102068834B - Oil-water separation automatic drain device for gas-liquid separator - Google Patents

Abstract

An automatic oil-water separation liquid discharge device for a gas-liquid separator is applied to the technical field of oil-water separation of natural gas produced in an oil-gas field. An oil-water partition plate is welded in the lower cylinder body, and a flange is arranged at the upper end of the outer wall of the lower cylinder body; an oil-water partition plate is welded in the upper cylinder body, and the upper end of the oil-water partition plate in the upper cylinder body is spaced from the top of the upper cylinder body; the lower end of the outer wall of the upper cylinder body is provided with a flange; the upper cylinder body is connected with the lower cylinder body through a flange, and a water cavity and an oil cavity communicated with the top parts are formed in the upper cylinder body and the lower cylinder body; a water outlet and an oil outlet are fixed on the wall of the lower cylinder body, and the inner ends of the water outlet and the oil outlet are respectively connected with a valve; a water drainage float bowl is arranged in the water cavity, an oil drainage float bowl is arranged in the oil cavity, the lower ends of the water drainage float bowl and the oil drainage float bowl are respectively connected with a float bowl lever, and the other end of the float bowl lever is connected with a valve core of the valve; an oil-water mixed liquid inlet is fixed on the wall of the upper cylinder body. The effect is as follows: the automatic separation and the automatic liquid drainage of oil and water can be realized; unattended operation is realized, and the labor force of workers is reduced.

Description

Oil-water separation automatic drain device for gas-liquid separator

technical field

The invention relates to the technical field of natural gas extraction in oil and gas fields, in particular to a special device capable of automatically separating oil and water in liquid discharged from a gas-liquid separator and discharging the oil and water respectively.

Background technique

At present, in the production of natural gas, the automatic liquid discharge device of the gas-liquid separator has been widely used in the natural gas separator, but the automatic liquid discharge of the natural gas gas-liquid separator can only discharge the oil-water mixture out of the gas-liquid separator together. The oil-water separation in the liquid is sent to the oil-water separator of the gathering station for separation after the liquid is discharged from the separator, which causes the problem of more subsequent separation equipment and a large area occupied by the equipment.

Chinese Patent Publication No.: CN2672041Y provides a high-efficiency oil-water separator, which uses different specific gravity differences to automatically separate immiscible liquids. The structure has a tank body, a buoy, and a lever. Its characteristic is that the upper end of the tank body is provided with a liquid inlet pipe, an oil discharge pipe, and an oil discharge valve, and the inlet of the oil discharge valve is connected with the oil discharge pipe; The inlet of the drain valve is connected to the drain pipe; both the drain valve and the oil drain valve are composed of a valve body, a valve stem, a valve core, and a valve seat. There is a buoy in the tank, and the connecting rod of the buoy is connected with a lever extending horizontally out of the tank. The connecting rod passes through the center of the buoy, and the upper and lower ends are respectively connected with the lever by connecting pins. The ends of the lever extending out of the tank are respectively connected with the drain valve and the valve stem of the oil discharge valve. The lever takes a short axis as the fulcrum, and It can rotate around the short shaft, and the short shaft is respectively fixed in the notches of the drain valve and the inlet flange of the oil drain valve.

Contents of the invention

The purpose of the present invention is to provide an automatic draining device for oil-water separation for a gas-liquid separator, which adopts a double-cavity double-tube structure, separates oil and water into different cavities, and then automatically discharges the oil and water out of the separator. That is to say, the oil and water mixed liquid separated by the gas-liquid separator is automatically separated and discharged to the oil tank and the water tank respectively.

The technical scheme adopted in the present invention is: an automatic draining device for oil-water separation of a gas-liquid separator, mainly composed of an exhaust port, an upper cylinder body, an oil-water separator, an oil-water mixing liquid inlet, a drainage buoy, a valve, and an oil discharge buoy , buoy lever, lower cylinder body, drain port and oil discharge port, characterized in that: the upper cylinder body and the lower cylinder body are cylindrical,

The lower cylinder has a bottom, and an oil-water separator is welded in the lower cylinder parallel to the axis of the lower cylinder. The lower end of the oil-water separator in the lower cylinder is welded to the bottom of the lower cylinder. The oil-water separator in the lower cylinder makes The inner cavity of the lower cylinder is divided into two parts which are not connected; the upper end of the outer wall of the lower cylinder has a flange.

The upper cylinder has a roof, and an oil-water separator is welded in the upper cylinder and parallel to the axis of the upper cylinder. The upper end of the oil-water separator in the upper cylinder has a distance from the top of the upper cylinder. The oil-water separator in the upper cylinder The inner cavity of the upper cylinder forms two parts connected; there is a flange at the lower end of the outer wall of the upper cylinder.

The upper cylinder body is opposite to the lower cylinder body and fixed through flange connection. The oil-water separator in the upper cylinder body is opposite to and sealed with the oil-water separator in the lower cylinder body. cavity. One of them is a water chamber and the other is an oil chamber.

A drain port and an oil discharge port are fixed on the wall of the lower cylinder body, the inner end of the drain port is in the water chamber, and the inner end of the oil discharge port is in the oil chamber; valves are respectively connected to the inner ends of the drain port and the oil discharge port.

There is a drainage buoy in the water chamber, an oil discharge buoy in the oil chamber, the lower ends of the drainage buoy and the oil discharge buoy are respectively connected with a buoy lever, and the other end of the buoy lever is connected with the spool of the valve. When the drainage buoy floats upwards and drives the buoy lever to rotate, the buoy lever opens the valve to discharge the water in the water chamber; the oil discharge buoy floats upward and drives the buoy lever to rotate, the buoy lever opens the valve to discharge the oil in the oil chamber.

An oil-water mixing liquid inlet is fixed on the upper cylinder wall, and the inner end of the oil-water mixing liquid inlet communicates with the water cavity.

In order to timely remove the volatilized gas inside the oil-water separation automatic drain device, an exhaust port is fixed on the top of the upper cylinder.

The drainage buoy and the oil discharge buoy are cylindrical in shape.

Briefly describe the working process of the oil-water separation automatic drain device used in the gas-liquid separator. See Figure 1.

1. Installation process: connect the liquid discharge port of the gas-liquid separator with the oil-water mixing liquid inlet 5 of the present invention, and at the same time connect the exhaust port 1 with the gas pipeline at the top of the separator, and connect the drain port 13 with the water storage tank, Connect the oil discharge port 14 with the oil storage tank to start the oil-water separation work.

2. Working process of oil-water separation:

First, the oil mixed liquid discharged from the gas-liquid separator enters the water chamber 4 from the oil-water mixed liquid inlet 5; since the oil and water liquids have different densities, and the two media are incompatible with each other, the density of water is high. It sinks to the bottom of the water chamber 4 under the action of gravity, while the oil floats on the top of the water. With the continuous increase of oil and water, after the water level increases, the buoyancy of the drainage buoy 6 submerged in the water is constantly increasing, and the drainage buoy 6 liters High, drives the buoy lever 10 of drainage buoy 6 bottoms, valve 7 is opened by buoy lever 10; When the water level in the water chamber 4 drops, the drainage buoy 6 descends, and drives the buoy lever 10 to close the valve 7 to complete the drainage cycle. The oil that stays in water chamber 4 is owing to density is less, even under the condition that drain buoy 6 is fully submerged completely, there is not enough buoyancy to float drain buoy 6, so water can not be discharged. As the separated oil accumulates to a certain height in the water chamber 4, it will overflow the oil-water separator 3, enter the oil chamber 8 through the top of the oil-water separator 3, and submerge the oil discharge buoy 9 in the oil chamber 8 to drain the oil. The buoy 9 floats, and the oil discharge buoy 9 drives the buoy lever 10 valve 7 at its lower part to open, and the oil enters the oil storage tank through the oil discharge port 14, thereby completing the oil discharge process.

Beneficial effects of the present invention: the present invention is used in the oil-water separation and automatic draining device of the gas-liquid separator, which can realize automatic separation and automatic draining of oil and water; realize unattended operation, and reduce the labor force of employees. The advantages of the present invention are: (1) The structure of double cavities and double buoys is adopted to realize the automatic draining function of the separator. (2) It can automatically separate the oil and water in the separator. (3) The subsequent separation process is reduced. Ensure that the gas-liquid separator can continue to work stably.

Description of drawings

Fig. 1 is a schematic diagram of an automatic liquid draining device for oil-water separation used in a gas-liquid separator.

Fig. 2 is a schematic cross-sectional view of C-C in Fig. 1 .

Fig. 3 is a cross-sectional schematic diagram of an automatic liquid draining device for oil-water separation used in a gas-liquid separator.

In the figure, 1. Air return pipe, 2. Upper cylinder body, 3. Oil-water separator, 4. Water chamber, 5. Oil-water mixed liquid inlet, 6. Drainage buoy, 7. Valve core, 8. Oil chamber, 9. Oil discharge float, 10. float lever, 11. lower cylinder, 12. flange, 13. drain port, 14. oil drain port.

Detailed ways

Embodiment 1: Taking an internal diameter of 400mm and the total height of the inner cavity of the upper cylinder body 2 and the lower cylinder body 11 being 1000mm as an example, the present invention will be further described in detail.

See Figure 1. The oil-water separation automatic drain device for the gas-liquid separator is mainly composed of an exhaust port 1, an upper cylinder body 2, an oil-water separator 3, an oil-water mixing liquid inlet 5, a drainage buoy 6, a valve 7, an oil discharge buoy 9, The buoy lever 10, the lower cylinder 11, the drain port 13 and the oil discharge port 14 are characterized in that: the upper cylinder 2 and the lower cylinder 11 are cylindrical with an inner diameter of 400mm, the inner height of the upper cylinder 2 is 300mm, and the lower cylinder The inner height of the body 11 is 700mm.

The lower cylinder body 11 has a bottom, and a stainless steel oil-water separator 3 is welded in the lower cylinder body 11 parallel to the axis of the lower cylinder body 11. The lower end of the oil-water separator 3 in the lower cylinder body 11 is welded to the bottom of the lower cylinder body 11. The oil-water separator 3 in the lower cylinder body 11 divides the inner chamber of the lower cylinder body 11 into two parts that are not connected; the upper end of the outer wall of the lower cylinder body 11 has a flange 12 .

The upper cylinder body 2 has a roof, and a stainless steel oil-water separator 3 is welded in the upper cylinder body 2 parallel to the axis of the upper cylinder body 2. The upper end of the oil-water separator 3 in the upper cylinder body 2 is 150mm from the top of the upper cylinder body 2. The oil-water separator 3 in the upper cylinder body 2 makes the inner cavity of the upper cylinder body 2 form two parts of Unicom; there is a flange 12 at the lower end of the upper cylinder body 2 outer wall.

The upper cylinder body 2 is opposite to the lower cylinder body 11 and connected and fixed through the flange 12. The oil-water separator 3 in the upper cylinder body 2 is opposite to and sealed with the oil-water separator 3 in the lower cylinder body 11. The upper cylinder body 2 and the lower cylinder body Two cavities connected at the top are formed in the body 11 . One of them is a water chamber 4, and the other is an oil chamber 8.

A drain port 13 and an oil drain port 14 are fixed on the wall of the lower cylinder body 11 , the inner end of the drain port 13 is in the water chamber 4 , and the inner end of the oil drain port 14 is in the oil chamber 8 . A valve 7 is respectively connected to the inner ends of the drain port 13 and the oil drain port 14 .

A stainless steel outer diameter is arranged in the water chamber 4 to be the drainage buoy 6 of 110mm, and in the oil chamber 8, a stainless steel outer diameter is arranged to be the oil discharge buoy 9 of 110mm. See Figure 2. The lower ends of the drainage buoy 6 and the oil discharge buoy 9 are respectively connected with a buoy lever 10 , and the other end of the buoy lever 10 is connected with the spool of the valve 7 . Utilize lever to realize switch valve, those skilled in the art can understand, and can select valve. Not described in detail.

See Figure 1. An oil-water mixing liquid inlet 5 is fixed on the wall of the upper cylinder body 2, and the inner end of the oil-water mixing liquid inlet 5 communicates with the water chamber 4. The position of the oil-water mixing liquid inlet 5 is at the top 450 mm away from the upper cylinder body 2 .

Claims (3)

1. water-oil separating automatic draining device that is used for gas-liquid separator; Mainly form by exhaust outlet (1), upper cylinder body (2), profit dividing plate (3), profit mixing inlet (5), draining floating drum (6), valve (7), oil extraction floating drum (9), float counter balance (10), lower cylinder body (11), discharge outlet (13) and oil drain out (14); It is characterized in that: upper cylinder body (2) and lower cylinder body (11) are cylindrical shape

Lower cylinder body (11) has the end; In lower cylinder body (11) and with lower cylinder body (11) parallel axes, be welded with a profit dividing plate (3); The back welding of the lower end of the interior profit dividing plate of lower cylinder body (11) (3) and lower cylinder body (11) connects, and the profit dividing plate (3) in the lower cylinder body (11) makes lower cylinder body (11) inner chamber be divided into the two parts that do not communicate; There is flange (12) lower cylinder body (11) outer wall upper end;

Upper cylinder body (2) has the top; In upper cylinder body (2) and with upper cylinder body (2) parallel axes, be welded with a profit dividing plate (3); Distance is arranged at the upper end of the interior profit dividing plate of upper cylinder body (2) (3) and upper cylinder body (2) top, and the profit dividing plate (3) in the upper cylinder body (2) makes upper cylinder body (2) inner chamber form two parts of UNICOM; In upper cylinder body (2) outer wall lower end flange (12) is arranged;

Upper cylinder body (2) relatively also is connected fixing with lower cylinder body (11) through flange (12); Profit dividing plate (3) in the upper cylinder body (2) and the interior relatively also sealing of profit dividing plate (3) of lower cylinder body (11); Form two chambeies of top UNICOM in upper cylinder body (2) and the lower cylinder body (11); One of them is water cavity (4), and one is oil pocket (8);

On lower cylinder body (11) wall, be fixed with discharge outlet (13) and oil drain out (14), the inner of discharge outlet (13) is in water cavity (4), and the inner of oil drain out (14) is in oil pocket (8); The inner at discharge outlet (13) and oil drain out (14) is connected with valve (7) respectively;

At water cavity (4) a draining floating drum (6) is arranged, an oil extraction floating drum (9) is arranged in oil pocket (8), the lower end of draining floating drum (6) and oil extraction floating drum (9) is connected with a float counter balance (10) respectively, and the other end of float counter balance (10) is connected with the spool of valve (7);

On upper cylinder body (2) wall, be fixed with profit mixing inlet (5), inner and water cavity (4) UNICOM of profit mixing inlet (5).

2. the water-oil separating automatic draining device that is used for gas-liquid separator as claimed in claim 1 is characterized in that: be fixed with exhaust outlet (1) at the top of upper cylinder body (2).

3. according to claim 1 or claim 2 the water-oil separating automatic draining device that is used for gas-liquid separator is characterized in that: the described draining floating drum (6) and oil extraction floating drum (9) the cylinder bodily form.

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