Stable-operation inclined tube type water distribution system

Abstract

The utility model relates to the technical field of inclined tube type water distribution for oil fields, in particular to an inclined tube type water distribution system capable of running stably. The inclined tube type water distribution system capable of running stably comprises an inclined tube and a reducing tube, the reducing tube is connected with a liquid phase inlet pipeline and is connected with a surge tank through a backwashing filter, the surge tank is connected with the inclined tube through a distributor, an inclined tube jacket is arranged on the outer side of the inclined tube, an air floating plate is arranged in the inclined tube, and the air floating plate is connected with the inclined tube. An oil outlet, a water outlet and an impurity outlet are sequentially formed below the inclined pipe, the oil outlet is located on the side close to the distributor, and the air floating plate is located between the water outlet and the impurity outlet. According to the system, the reducing pipe is connected with the liquid phase inlet pipeline and then connected with the pressure stabilizing tank through the backwashing filter, the pressure stabilizing tank can effectively stabilize the liquid inlet pressure and reduce the liquid inlet fluctuation, a stable working condition is provided for subsequent oil-water separation in the inclined pipe, the separation effect is greatly improved, and the content of large-particle impurities in treated liquid is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of inclined pipe water distribution for oil fields, in particular to a stably operated inclined pipe water distribution system. Background Art

[0002] The inclined tube water separator is an important equipment in the field of water separation technology for oil fields. It uses the inclined tube structure and the difference in oil-water density to separate oil and water in the inclined tube, playing a key role in the treatment of oilfield produced fluid.

[0003] There are many problems with the existing inclined tube water separation device. In terms of liquid inlet, the liquid inlet is unstable and fluctuates greatly, which makes the water separation system unable to operate under stable working conditions. The instability of the liquid inlet interferes with the separation process of oil and water in the inclined tube, affecting the separation effect. The treated liquid contains a large number of large particle impurities and cannot meet the requirements of the subsequent production process of the oil field for the quality of the produced liquid. In terms of treatment effect, the existing device is greatly affected by temperature. When the temperature of the produced liquid changes, the physical properties of the oil and water, such as density and viscosity, will also change, which will affect the oil-water separation efficiency and reduce the overall treatment effect. It not only increases the treatment cost, but also reduces the production efficiency, which is not conducive to the efficient and stable production of the oil field. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a stably operating inclined tube water distribution system, which is connected to the liquid phase inlet pipeline by setting a tapered tube, and then connected to the pressure-stabilizing tank through a backwash filter. The pressure-stabilizing tank can effectively stabilize the liquid inlet pressure, reduce liquid inlet fluctuations, and provide a stable working condition for the subsequent oil-water separation in the inclined tube, greatly improving the separation effect and reducing the content of large particle impurities in the treated liquid.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The stably operating inclined tube water distribution system comprises an inclined tube and a tapered tube, wherein the tapered tube is connected to a liquid phase inlet pipeline, the tapered tube is connected to a pressure stabilizing tank via a backwash filter, the pressure stabilizing tank is connected to the inclined tube via a distributor, an inclined tube jacket is provided on the outside of the inclined tube, an air flotation plate is provided inside the inclined tube, an oil outlet, a water outlet and an impurity outlet are sequentially provided below the inclined tube, the oil outlet is located on a side close to the distributor, and the air flotation plate is located between the water outlet and the impurity outlet.

[0007] The inclined tube is tilted to increase the surface area of ​​oil-water separation, and use gravity and buoyancy to separate oil and water droplets more efficiently in the inclined tube. An air flotation plate is set inside the inclined tube to enhance the floating separation effect of impurities and oil droplets; an inclined tube jacket is set on the outside to maintain a suitable temperature by passing steam to reduce the impact of temperature on the separation effect. The tapered tube is connected to the liquid phase inlet pipeline to make a preliminary pressure adjustment on the incoming liquid, so that the liquid can flow more stably in the subsequent process, providing a good prerequisite for the pressure-stabilizing tank to stabilize the inlet pressure.

[0008] A bracket is arranged below the inclined tube, an ultrasonic device is arranged between the inclined tube and the distributor, and the connection between the ultrasonic device and the inclined tube is located at the upper end of the inclined tube.

[0009] It also includes a heat exchange tank, which is provided with a heat exchange tank coil inside. One end of the heat exchange tank coil is connected to the blower, and the other end is connected to the air flotation plate. The air flotation plate is located between the water outlet and the impurity outlet in the inclined tube. It is connected to the blower and the heat exchange tank coil to release tiny bubbles, promote the floating separation of impurities and oil droplets, and improve the impurity removal capacity.

[0010] The inclined tube jacket is connected to a steam inlet pipe, the connection between the steam inlet pipe and the inclined tube jacket is located on the side close to the oil outlet, the inclined tube jacket is connected to the heat exchange tank through a condensate pipe, and the connection between the condensate pipe and the inclined tube jacket is located on the side close to the impurity outlet.

[0011] The water outlet is connected to a delivery pump through a pipeline, and the delivery pump is connected to a backwash filter through a backwash pipeline, and a wastewater recovery pipeline is connected to the backwash pipeline. The backwash filter can filter out large particles of impurities in the liquid, prevent impurities from entering subsequent equipment, ensure the normal operation of the equipment, and extend the service life of the equipment. At the same time, through the backwash pipeline connected to the delivery pump, self-backwashing can be achieved to reduce maintenance costs.

[0012] The inclined tube is provided with a de-impurity water inlet, the backwashing pipeline is connected with the de-impurity water inlet through the de-impurity pipeline, and the oil outlet is connected with an oil outlet pipeline.

[0013] The working principle of the utility model is:

[0014] Liquid inlet stage: The liquid phase enters the pipeline from the liquid phase and flows into the reducer, which makes a preliminary pressure adjustment on the liquid. Subsequently, the liquid passes through the backwash filter to filter out large particles of impurities to prevent them from entering the subsequent equipment and affecting the operation. The filtered liquid enters the pressure-regulating tank, which stabilizes the liquid pressure and keeps the liquid inlet pressure at 0.5-1.5MPa to ensure the stability of the subsequent separation process. At the same time, the ultrasonic device is turned on and the power is set to 100-500W. The ultrasonic wave acts on the liquid to destroy the emulsified structure and accelerate the separation of oil and water.

[0015] Separation stage: Liquid enters the inclined tube evenly through the distributor. In the inclined tube, the density difference between oil and water is used for preliminary separation. The oil phase flows upward to the oil outlet for discharge, and the water phase and impurities flow downward. The air flotation plate starts to work, and the blower transports air to the air flotation plate through the heat exchange tank coil. After the air is heated to 30-50°C in the heat exchange tank, the air flotation plate releases tiny bubbles, which attach to impurities and oil droplets to promote their floating and separation. Steam is introduced into the inclined tube jacket, and the steam pressure is maintained at 0.2-0.5MPa to ensure that the temperature in the inclined tube is within an appropriate range (between 35-45°C) to reduce the influence of temperature on the separation effect.

[0016] Discharge stage: The separated oil is discharged from the oil outlet through the oil outlet pipe, and the water is discharged from the water outlet through the delivery pump. The delivery pump delivers part of the water to the backwash filter through the backwash pipe to backwash the filter. The wastewater generated by backwashing is recycled through the wastewater recovery pipe. Impurities are discharged regularly from the impurity outlet. If there are residual impurities in the inclined tube, the impurity removal water can be introduced through the impurity removal water inlet, and the impurity removal water enters the inclined tube through the impurity removal pipe for flushing to ensure the normal operation of the inclined tube.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) By setting a tapered pipe connected to the liquid phase inlet pipeline and then connecting it to the pressure-surge tank through the backwash filter, the pressure-surge tank can effectively stabilize the inlet pressure and reduce the inlet fluctuation, thus providing a stable working condition for the subsequent oil-water separation in the inclined tube, greatly improving the separation effect and reducing the content of large particle impurities in the treated liquid.

[0019] (2) An air flotation plate is installed inside the inclined tube to generate tiny bubbles. These bubbles can attach to impurities and oil droplets, and use the buoyancy of the bubbles to promote the floating and separation of impurities and oil droplets, further improving the ability to remove impurities in the liquid and improving the water separation effect. The ultrasonic device installed between the inclined tube and the distributor can use the cavitation effect and mechanical effect of ultrasound to destroy the emulsified structure in the liquid, promote the separation of oil and water, and improve the treatment efficiency and quality.

[0020] (3) The inclined tube jacket connects the steam inlet pipe and the condensate pipe. The steam inlet pipe can pass steam to heat the liquid in the inclined tube to maintain a suitable temperature and reduce the impact of temperature changes on oil-water separation; the condensate flows into the heat exchange tank through the condensate pipe to achieve heat recovery. The heat exchange tank coil inside the heat exchange tank is connected to the blower at one end and the flotation plate at the other end. The air provided by the blower can be used to flot the liquid. At the same time, the air is heated in the heat exchange tank, which improves the flotation effect, further reduces the impact of temperature on the treatment effect, and improves the overall treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the oblique tube type water distribution system of the utility model which operates stably;

[0022] In the figure: 1. inclined tube; 2. tapered tube; 3. backwash filter; 4. pressure regulating tank; 5. distributor; 6. ultrasonic device; 7. inclined tube jacket; 8. oil outlet; 9. water outlet; 10. impurity outlet; 11. delivery pump; 12. air flotation plate; 13. heat exchange tank; 14. blower; 15. backwash pipeline; 16. impurity removal pipeline; 17. impurity removal water inlet; 18. condensate pipeline; 19. heat exchange tank coil; 20. steam inlet pipeline; 21. oil outlet pipeline; 22. wastewater recovery pipeline. DETAILED DESCRIPTION

[0023] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] like Figure 1As shown, a stably operated inclined tube water distribution system comprises an inclined tube 1, a tapered tube 2, the tapered tube 2 is connected to a liquid phase inlet pipeline, the tapered tube 2 is connected to a pressure stabilizing tank 4 through a backwash filter 3, the pressure stabilizing tank 4 is connected to the inclined tube 1 through a distributor 5, an inclined tube jacket 7 is provided on the outside of the inclined tube 1, an air flotation plate 12 is provided inside the inclined tube 1, an oil outlet 8, a water outlet 9 and an impurity outlet 10 are provided below the inclined tube 1 in sequence, the oil outlet 8 is located on a side close to the distributor 5, and the air flotation plate 12 is located between the water outlet 9 and the impurity outlet 10. The pressure stabilizing tank 4 is connected between the backwash filter 3 and the distributor 5, effectively stabilizes the liquid pressure, reduces the fluctuation of the inlet liquid, provides a stable working condition for the oil-water separation in the inclined tube 1, and improves the separation effect. The distributor 5 evenly distributes the liquid output from the pressure stabilizing tank 4 into the inclined tube 1, ensuring that each part in the inclined tube 1 can fully separate the oil and water, and improves the separation efficiency and uniformity. A bracket is provided below the inclined tube 1, and an ultrasonic device 6 is provided between the inclined tube 1 and the distributor 5, and the connection between the ultrasonic device 6 and the inclined tube 1 is located at the upper end of the inclined tube 1. A heat exchange tank 13 is also included, and a heat exchange tank coil 19 is provided inside the heat exchange tank 13, and one end of the heat exchange tank coil 19 is connected to the blower 14, and the other end is connected to the air flotation plate 12. A steam inlet pipe 20 is connected to the inclined tube jacket 7, and the connection between the steam inlet pipe 20 and the inclined tube jacket 7 is located on the side close to the oil outlet 8. The inclined tube jacket 7 is connected to the heat exchange tank 13 through a condensate pipe 18, and the connection between the condensate pipe 18 and the inclined tube jacket 7 is located on the side close to the impurity outlet 10. The water outlet 9 is connected to a delivery pump 11 through a pipe, and the delivery pump 11 is connected to the backwash filter 3 through a backwash pipe 15, and a wastewater recovery pipe 22 is connected to the backwash pipe 15. The inclined pipe 1 is provided with a de-impurity water inlet 17 , the backwashing pipeline 15 is connected to the de-impurity water inlet 17 via a de-impurity pipeline 16 , and the oil outlet 8 is connected to an oil outlet pipeline 21 .

[0026] The above-mentioned stably operated inclined tube water distribution system, when working, includes the following steps:

[0027] (1) The liquid phase enters the pipeline from the liquid phase and flows into the reducer 2, which performs preliminary pressure adjustment on the liquid. Subsequently, the liquid passes through the backwash filter 3 to filter out large particles of impurities to prevent them from entering the subsequent equipment and affecting the operation. The filtered liquid enters the pressure regulating tank 4, which stabilizes the liquid pressure. At the same time, the ultrasonic device 6 is turned on. (2) The liquid enters the inclined tube 1 evenly through the distributor 5. In the inclined tube 1, the oil-water density difference is used for preliminary separation. The oil phase flows upward to the oil outlet 8 for discharge, and the water phase and impurities flow downward. The air flotation plate 12 starts to work, and the blower 14 transports air to the air flotation plate 12 through the heat exchange tank coil 19. The air flotation plate 12 releases tiny bubbles, which attach to impurities and oil droplets to promote their floating separation. Steam is introduced into the inclined tube jacket 7 through the steam inlet pipe 20 to ensure that the temperature in the inclined tube 1 is within an appropriate range and reduce the influence of temperature on the separation effect. (3) The separated oil is discharged from the oil outlet 8 through the oil outlet pipe 21, and the water is discharged from the water outlet 9 through the delivery pump 11. The delivery pump 11 delivers part of the water to the backwash filter 3 through the backwash pipe 15 to backwash the filter, and the wastewater generated by the backwash is recycled through the wastewater recovery pipe 22. Impurities are regularly discharged from the impurity outlet 10. If there are residual impurities in the inclined tube 1, the impurity removal water can be introduced through the impurity removal water inlet 17, and the impurity removal water enters the inclined tube 1 through the impurity removal pipe 16 for flushing to ensure the normal operation of the inclined tube 1.

Claims

1. A stably operated inclined tube water distribution system, characterized in that: The invention comprises an inclined tube (1) and a gradually contracting tube (2), wherein the gradually contracting tube (2) is connected to a liquid phase inlet pipeline, the gradually contracting tube (2) is connected to a pressure stabilizing tank (4) via a backwashing filter (3), the pressure stabilizing tank (4) is connected to the inclined tube (1) via a distributor (5), an inclined tube jacket (7) is provided on the outside of the inclined tube (1), an air flotation plate (12) is provided inside the inclined tube (1), an oil outlet (8), a water outlet (9) and an impurity outlet (10) are provided in sequence below the inclined tube (1), the oil outlet (8) is located on a side close to the distributor (5), and the air flotation plate (12) is located between the water outlet (9) and the impurity outlet (10).

2. The stably operated inclined tube water distribution system according to claim 1 is characterized in that: A bracket is provided below the inclined tube (1), an ultrasonic device (6) is provided between the inclined tube (1) and the distributor (5), and the connection between the ultrasonic device (6) and the inclined tube (1) is located at the upper end of the inclined tube (1).

3. The stably operated inclined tube water distribution system according to claim 1 is characterized in that: It also includes a heat exchange tank (13), wherein a heat exchange tank coil (19) is provided inside the heat exchange tank (13), and one end of the heat exchange tank coil (19) is connected to the blower (14), and the other end is connected to the air flotation plate (12).

4. The stably operated inclined tube water distribution system according to claim 3 is characterized in that: The inclined tube jacket (7) is connected to a steam inlet pipe (20), and the connection between the steam inlet pipe (20) and the inclined tube jacket (7) is located on a side close to the oil outlet (8). The inclined tube jacket (7) is connected to the heat exchange tank (13) via a condensate pipe (18), and the connection between the condensate pipe (18) and the inclined tube jacket (7) is located on a side close to the impurity outlet (10).

5. The stably operated inclined tube water distribution system according to claim 1 is characterized in that: The water outlet (9) is connected to a delivery pump (11) via a pipeline, the delivery pump (11) is connected to the backwash filter (3) via a backwash pipeline (15), and the backwash pipeline (15) is connected to a wastewater recovery pipeline (22).

6. The stably operated inclined tube water distribution system according to claim 5, characterized in that: The inclined tube (1) is provided with a de-impurity water inlet (17), the backwashing pipeline (15) is connected to the de-impurity water inlet (17) via a de-impurity pipeline (16), and the oil outlet (8) is connected to an oil outlet pipeline (21).

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