A physical demulsification device for separating oil and water

Abstract

The utility model discloses a kind of physical demulsification oil-water separation devices, it is related to oilfield development technical field, including separation tank, separation tank has several separation cavities, separation cavity is divided into layered area and oil storage area, demulsification module is fixed in layered area, demulsification module is divided into oil inlet area and coalescence area by layered area;Oil inlet area, demulsification module, coalescence area and oil storage area are sequentially arranged, oil inlet area is used to communicate with outside produced liquid supply source, demulsification module is used to squeeze the bubble in produced liquid and break, the oil liquid obtained after produced liquid oil-water separation in coalescence area can overflow to oil storage area;The utility model can effectively reduce gathering and transportation load and energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of oilfield development technology, and in particular to a physical demulsification oil-water separation device. Background Technology

[0002] "Large-scale blending" is a centralized process mode for the treatment of produced fluids during the high water-cut period in oilfield development. Its core is to mix the produced fluids from multiple oil wells and then transport them to a treatment station for centralized treatment.

[0003] However, for remote well areas with long transportation distances and complex road conditions, the "large-scale mixing" centralized processing mode has the problem of high energy consumption for gathering and transportation. Utility Model Content

[0004] The purpose of this invention is to provide a physical demulsification oil-water separation device to solve the problems existing in the prior art, and to effectively reduce the collection and transportation load and energy consumption.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a physical demulsification oil-water separation device, including a separation tank with several separation chambers. Each separation chamber is divided into a stratification zone and an oil storage zone. A demulsification module is fixedly installed in the stratification zone, which further divides the stratification zone into an oil inlet zone and a coalescence zone. The oil inlet zone, the demulsification module, the coalescence zone, and the oil storage zone are arranged sequentially. The oil inlet zone is connected to an external produced fluid supply source. The demulsification module is used to break air bubbles in the produced fluid. The oil obtained after oil-water separation in the coalescence zone can overflow into the oil storage zone.

[0006] Preferably, it also includes a rectifier module, which is fixedly installed in the oil inlet area and can buffer the produced fluid entering the oil inlet area.

[0007] Preferably, the rectifier module includes an inlet tank and an inner inlet pipe. The inlet tank is fixedly located at the bottom of the oil inlet area. The bottom surface of the inlet tank is a sloping surface. The top end of the inner inlet pipe is used to communicate with an external produced fluid supply source. The bottom end of the inner inlet pipe extends into the inlet tank.

[0008] Preferably, it also includes a three-way control valve. The separation tank has two separation chambers. The first port of the three-way control valve is used to connect with an external source of extracted liquid. The second port of the three-way control valve is fixedly connected to and connected with the top end of the liquid inlet tube in one of the separation chambers. The third port of the three-way control valve is fixedly connected to and connected with the top end of the liquid inlet tube in the other separation chamber.

[0009] Preferably, the demulsification module has a plurality of slits for the produced fluid to pass through and for breaking air bubbles in the produced fluid.

[0010] Preferably, it also includes a mist-catching module, which is fixedly installed above the oil storage area. One end of the mist-catching module can be connected to the outside. The mist-catching module is used to allow the gas separated from the produced fluid to escape to the outside and to trap liquid droplets.

[0011] Preferably, it also includes a drain pipe and an oil drain pipe. One end of the drain pipe is fixedly connected to the separator and communicates with the coalescence zone. A drain valve is fixedly installed on the drain pipe. One end of the oil drain pipe is fixedly connected to the separator and communicates with the oil storage zone. An oil drain valve is fixedly installed on the oil drain pipe.

[0012] Preferably, it further includes a first level gauge and a second level gauge. The first level gauge is fixedly installed in the layered zone and can detect the position of the oil-water layering interface in the layered zone. The second level gauge is fixedly installed in the oil storage zone and can detect the position of the top surface of the oil in the oil storage zone.

[0013] Preferably, it also includes a controller, which is communicatively connected to the first level gauge, the second level gauge, the drain valve, and the oil drain valve, and the controller is capable of controlling the operation of the drain valve and the oil drain valve.

[0014] Preferably, the oil storage areas of all the separation chambers within the separation tank are interconnected.

[0015] The present invention achieves the following technical advantages over the prior art: The physical demulsification oil-water separation device provided by this utility model has several separation chambers in the separation tank, which can realize alternating and intermittent static sedimentation separation, thereby improving the separation efficiency. The separation chamber is divided into a stratification zone and an oil storage zone. Oil and water stratification is completed in the stratification zone, and the oil obtained after oil-water separation of the produced fluid is stored in the oil storage zone to meet the requirements of subsequent gathering and transportation processes. Specifically, the demulsification module breaks the air bubbles in the produced fluid to achieve physical demulsification, allowing the oil to coalesce. The separated upper layer of oil overflows to the oil storage zone to wait for collection and transportation. It has low energy consumption, stable separation process, high separation efficiency, and small equipment footprint. It can realize efficient room temperature pre-separation of produced fluid, so that the produced fluid can be pre-separated on-site at room temperature before collection and transportation, which can effectively reduce the collection and transportation load and energy consumption. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the physical demulsification and oil-water separation device provided by this utility model; Figure 2 A schematic diagram of the pipeline connection of the physical demulsification oil-water separation device provided by this utility model; Figure 3 A schematic diagram of the working process of a separation chamber in the physical demulsification oil-water separation device provided by this utility model; Figure 4 A schematic diagram of the operation of another separation chamber in the physical demulsification oil-water separation device provided by this utility model; Figure 5 A schematic diagram showing the distribution of the oil storage area and the two separation chambers in the physical demulsification oil-water separation device provided by this utility model; In the diagram: 1-Separation tank, 2-Oil inlet area, 3-Demulsification module, 4-Gathering area, 5-Oil storage area, 6-Liquid inlet tank, 7-Liquid inlet inner pipe, 8-Three-way control valve, 9-Mist eliminator module, 10-Drain pipe, 11-Oil drain pipe, 12-Drain valve, 13-Oil drain valve, 14-First level gauge, 15-Second level gauge, 16-Controller. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The purpose of this invention is to provide a physical demulsification oil-water separation device to solve the problems existing in the prior art, and to effectively reduce the collection and transportation load and energy consumption.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 5As shown, this utility model provides a physical demulsification oil-water separation device, including a separation tank 1. The separation tank 1 has several separation chambers, which are divided into a stratification zone and an oil storage zone 5. A demulsification module 3 is fixedly installed in the stratification zone, which divides the stratification zone into an oil inlet zone 2 and a coalescence zone 4. The oil inlet zone 2, the demulsification module 3, the coalescence zone 4 and the oil storage zone 5 are arranged in sequence. The oil inlet zone 2 is used to connect with an external produced fluid supply source. The demulsification module 3 is used to break the air bubbles in the produced fluid. The oil obtained after oil-water separation in the coalescence zone 4 can overflow to the oil storage zone 5.

[0022] The physical demulsification oil-water separation device provided by this utility model has several separation chambers in the separation tank 1, which can realize alternating and intermittent static sedimentation separation, thereby improving the separation efficiency. The separation chamber is divided into a stratification zone and an oil storage zone 5. Oil and water stratification is completed in the stratification zone, and the oil obtained after oil-water separation of the produced fluid is stored in the oil storage zone 5 to meet the requirements of subsequent gathering and transportation processes. Specifically, the demulsification module 3 breaks the air bubbles in the produced fluid to achieve physical demulsification, allowing the oil to coalesce. The separated upper layer of oil overflows to the oil storage zone 5 to wait for collection and transportation. It has low energy consumption, stable separation process, high separation efficiency, and small equipment footprint. It can realize efficient room temperature pre-separation of produced fluid, so that the produced fluid can be pre-separated on-site at room temperature before collection and transportation, which can effectively reduce the collection and transportation load and energy consumption.

[0023] As a preferred embodiment of the present invention, the physical demulsification oil-water separation device provided by the present invention also includes a rectifier module. The rectifier module is fixedly installed in the oil inlet zone 2. The rectifier module can buffer the produced fluid entering the oil inlet zone 2, reduce the impact of the incoming fluid on the liquid surface of the stratification zone, maintain the stability of the liquid surface, and create favorable conditions for sedimentation separation.

[0024] In a preferred embodiment of this utility model, the rectifier module includes an inlet tank 6 and an inner inlet pipe 7. The inlet tank 6 is fixedly located at the bottom of the oil inlet area 2. The bottom surface of the inlet tank 6 is a sloping surface. The top end of the inner inlet pipe 7 is used to connect with an external produced fluid supply source. The bottom end of the inner inlet pipe 7 extends into the inlet tank 6, so that the produced fluid supplied by the external produced fluid supply source first enters the inlet tank 6 along the inner inlet pipe 7, and then slowly overflows into the liquid storage area 2 along the bottom surface of the inlet tank 6.

[0025] As a preferred embodiment of the present invention, the physical demulsification oil-water separation device provided by the present invention further includes a three-way control valve 8. The separation tank 1 has two separation chambers. The first port of the three-way control valve 8 is used to connect with the external produced fluid supply source. The second port of the three-way control valve 8 is fixedly connected and connected to the top end of the liquid inlet pipe 7 in one separation chamber. The third port of the three-way control valve 8 is fixedly connected and connected to the top end of the liquid inlet pipe 7 in the other separation chamber, which can improve the separation efficiency. In this embodiment, a weir plate is first used to separate the separation zone and the oil storage zone 5 in the separation tank 1. Then, a longitudinally separating weir plate is used in the separation zone to separate two separation chambers that can work alternately.

[0026] As a preferred embodiment of the present invention, the demulsification module 3 has a number of slits for the produced fluid to pass through and to break the air bubbles in the produced fluid. When the produced fluid flows through, it can only pass through the slits arranged in a row. During this process, the air bubbles will be broken, thereby achieving demulsification.

[0027] As a preferred embodiment of the present invention, the physical demulsification oil-water separation device provided by the present invention further includes a mist-catching module 9. The mist-catching module 9 is fixedly installed above the oil storage area 5. One end of the mist-catching module 9 can be connected to the outside. The mist-catching module 9 is used to allow the gas separated from the produced fluid to escape to the outside and to intercept the droplets. The mist-catching module 9 can be, but is not limited to, a filter structure formed by tightly wrapped metal wire mesh. Gas can pass through, and the carried droplets are filtered and intercepted.

[0028] As a preferred embodiment of the present invention, the physical demulsification oil-water separation device provided by the present invention further includes a drain pipe 10 and an oil drain pipe 11. One end of the drain pipe 10 is fixedly connected to the separation tank 1 and communicates with the coalescence zone 4. A drain valve 12 is fixedly provided on the drain pipe 10. The water in the lower layer is discharged after reaching the set liquid level and can be introduced into the reinjection system. One end of the oil drain pipe 11 is fixedly connected to the separation tank 1 and communicates with the oil storage zone 5. An oil drain valve 13 is fixedly provided on the oil drain pipe 11.

[0029] As a preferred embodiment of the present invention, the physical demulsification oil-water separation device provided by the present invention further includes a first level gauge 14 and a second level gauge 15. The first level gauge 14 is fixedly installed in the stratification zone and can detect the position of the oil-water stratification interface in the stratification zone. The second level gauge 15 is fixedly installed in the oil storage zone 5 and can detect the position of the top surface of the oil in the oil storage zone 5, which is convenient for monitoring the situation in the separation tank 1.

[0030] As a preferred embodiment of this utility model, the physical demulsification oil-water separation device provided by this utility model also includes a controller 16. The controller 16 is communicatively connected to the first level gauge 14, the second level gauge 15, the drain valve 12, and the oil drain valve 13. The controller 16 can control the operation of the drain valve 12 and the oil drain valve 13 so as to accurately control the processing time according to the output, which can both ensure the production capacity and improve the separation efficiency. Under the control of the controller 16, all-weather unmanned automatic operation is achieved. In this embodiment, the controller 16 adopts a PLC.

[0031] In a preferred embodiment of this utility model, the oil storage areas 5 of all separation chambers in the separator 1 are interconnected, which facilitates manufacturing and use.

[0032] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A physical demulsification and oil-water separation device, characterized in that: The system includes a separation tank with several separation chambers, each chamber divided into a stratification zone and an oil storage zone. A demulsification module is fixedly installed in the stratification zone, further dividing it into an oil inlet zone and a coalescence zone. The oil inlet zone, the demulsification module, the coalescence zone, and the oil storage zone are arranged sequentially. The oil inlet zone is connected to an external produced fluid supply source. The demulsification module is used to break air bubbles in the produced fluid. The oil obtained after oil-water separation in the coalescence zone can overflow into the oil storage zone.

2. The physical demulsification oil-water separation device according to claim 1, characterized in that: It also includes a rectifier module, which is fixedly installed in the oil inlet area and can buffer the produced fluid entering the oil inlet area.

3. The physical demulsification oil-water separation device according to claim 2, characterized in that: The rectifier module includes an inlet tank and an inner inlet pipe. The inlet tank is fixedly located at the bottom of the oil inlet area. The bottom surface of the inlet tank is a sloping surface. The top end of the inner inlet pipe is used to connect with an external produced fluid supply source. The bottom end of the inner inlet pipe extends into the inlet tank.

4. The physical demulsification oil-water separation device according to claim 3, characterized in that: It also includes a three-way control valve. The separation tank has two separation chambers. The first port of the three-way control valve is used to connect with an external source of produced liquid. The second port of the three-way control valve is fixedly connected to and connected with the top end of the inlet pipe in one of the separation chambers. The third port of the three-way control valve is fixedly connected to and connected with the top end of the inlet pipe in the other separation chamber.

5. The physical demulsification oil-water separation device according to claim 1, characterized in that: The demulsification module has several slits for the produced fluid to pass through and for breaking air bubbles in the produced fluid.

6. The physical demulsification oil-water separation device according to claim 1, characterized in that: It also includes a mist-catching module, which is fixedly installed above the oil storage area. One end of the mist-catching module can be connected to the outside. The mist-catching module is used to allow the gas separated from the produced fluid to escape to the outside and to trap liquid droplets.

7. The physical demulsification oil-water separation device according to claim 1, characterized in that: It also includes a drain pipe and an oil drain pipe. One end of the drain pipe is fixedly connected to the separator and communicates with the coalescence zone. A drain valve is fixedly installed on the drain pipe. One end of the oil drain pipe is fixedly connected to the separator and communicates with the oil storage zone. An oil drain valve is fixedly installed on the oil drain pipe.

8. The physical demulsification oil-water separation device according to claim 7, characterized in that: It also includes a first level gauge and a second level gauge. The first level gauge is fixedly installed in the layered zone and can detect the position of the oil-water layering interface in the layered zone. The second level gauge is fixedly installed in the oil storage zone and can detect the position of the top surface of the oil in the oil storage zone.

9. The physical demulsification oil-water separation device according to claim 8, characterized in that: It also includes a controller, which is communicatively connected to the first level gauge, the second level gauge, the drain valve, and the oil drain valve, and the controller is capable of controlling the operation of the drain valve and the oil drain valve.

10. The physical demulsification oil-water separation device according to claim 1, characterized in that: The oil storage areas of all the separation chambers within the separation tank are interconnected.

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