Oil-water separator for offshore oil production

Abstract

The utility model discloses an oil-water separator for offshore oil production, which belongs to the field of offshore oil production and comprises a water inlet valve and an oil-water separation mechanism which are connected through a pretreatment mechanism. A filter is arranged at the drainage end of the oil-water separation mechanism, and the oil-water separation mechanism comprises a centrifugal tube and a water inlet tube which is fixedly connected to the centrifugal tube and is tangent to the side surface of the centrifugal tube. According to the oil-water separator for offshore oil production, large-particle impurities are filtered through the pretreatment mechanism, oil-water separation is realized by utilizing the centrifugal principle of the oil-water separation mechanism, and water is further purified and separated through the filter, so that the water reaches the discharge standard, the oil-water separation efficiency and quality are improved, the maintenance cost is reduced, and the oil-water separation efficiency is improved. The method has important practical application value for offshore oil production.

Description

Technical Field

[0001] The utility model relates to the field of offshore oil production, in particular to an oil-water separator used for offshore oil production. Background Art

[0002] The offshore oil production field refers to a series of activities of oil exploration, extraction, processing and transportation in the marine environment. In the field of oil production, oil-water separator is a vital equipment. In each link of oil extraction, refining, storage and transportation, oily wastewater needs to be effectively treated to protect the environment, save resources and ensure production safety.

[0003] The Chinese utility model patent with publication number CN213965274U discloses an oil-water separator for offshore oil production. The oil-water separator uses the principle of automatic separation of oil and water density difference to achieve separation by step-by-step filtration. This passive separation method is inefficient, and its internal structure is complex, and involves many parts and instruments. It is prone to erosion and damage during long-term use at sea. If it is not maintained frequently, it will have a short service life. Therefore, it is costly, inefficient, and has poor practicality.

[0004] Therefore, an oil-water separator for offshore oil production is provided to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The utility model provides an oil-water separator for offshore oil production, aiming to solve the problem of poor practicability caused by high cost and low efficiency of the existing oil-water separator for offshore oil production proposed in the background technology.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an oil-water separator for offshore oil production, comprising a water inlet valve and an oil-water separation mechanism.

[0009] In order to improve the oil-water separation efficiency, the oil-water separation mechanism and the water inlet valve are connected via a pretreatment mechanism, and a filter is provided at the drainage end of the oil-water separation mechanism; the pretreatment mechanism is provided at the water inlet for preliminary filtration, thereby improving the oil-water separation efficiency, and the filter is used to purify the water after oil-water separation again, thereby improving the oil-water separation effect.

[0010] In order to use centrifugal force to quickly separate the oil-water mixture, the oil-water separation mechanism includes a centrifuge tube, a water inlet pipe fixedly connected to the centrifuge tube and tangent to the side of the centrifuge tube, a conical cyclone tube fixedly connected to the bottom of the centrifuge tube and connected to the centrifuge tube, a drainage pipe fixedly connected to the bottom of the conical cyclone tube and connected to the conical cyclone tube, and an oil drainage pipe fixedly connected to the center of the top of the centrifuge tube and extending to the top of the conical cyclone tube, and the bottom of the drainage pipe is fixedly connected to the inlet end of the filter; the oil-water mixture is cut into the centrifuge tube to form a circulation, and under the action of centrifugal force, due to the different densities of oil and water, the oil and water are separated into layers, and fall into the conical cyclone tube with gravity, and are further separated to form inner and outer vortexes, the outer layer of water vortex with large density flows down along the tube wall, and the oil vortex with smaller density rises and is discharged through the oil drainage pipe.

[0011] In order to filter out larger impurities in advance, the pretreatment mechanism includes a filter tube whose two ends are connected to the water inlet pipe and the water inlet valve through flanges, and a filter net fixedly connected to the filter tube; when the oil-water mixture passes through the filter tube, the filter net inside filters out large particles of impurities, thereby reducing impurities in subsequent oil-water separation and ensuring the separation effect.

[0012] Preferably, in order to achieve further filtration of the discharged water, the filter includes a pipe body, a flange joint fixedly connected to the top end of the pipe body and connected to the bottom end of the drain pipe, a bamboo charcoal filter layer fixedly connected to the flange joint and located inside the pipe body, and a membrane filter layer sleeved outside the bamboo charcoal filter layer and located inside the pipe body, wherein the top end of the membrane filter layer is fixedly connected to the inner wall of the flange joint.

[0013] Preferably, in order to support and maintain the stability of the oil-water separation mechanism as a whole on the offshore platform, a fixed platform is provided on the outside of the oil-water separation mechanism, which is fixedly connected to the outer wall of the conical cyclone tube through fixings; the oil-water separation mechanism is surrounded by the fixed platform to support the outer shell of the oil-water separation mechanism, and is fixed by connecting to the outer wall of the conical cyclone tube through fixings.

[0014] Preferably, in order to facilitate the inspection personnel to climb, the fixed platform is provided with a ladder, and a guardrail is fixedly installed on the ladder; during maintenance, the staff can climb through the ladder and be protected by the guardrail.

[0015] Preferably, in order to facilitate the control of drainage, a control valve is installed on the drainage pipe; the drainage is controlled by opening and closing the control valve.

[0016] Preferably, in order to facilitate cleaning of the filter tube, an accumulation groove is provided at the bottom of the filter tube; when idle, impurities will accumulate in the accumulation groove, which is convenient for subsequent cleaning.

[0017] Preferably, in order to facilitate the disassembly and assembly of the filter tube, a cover is fixedly installed on the accumulation tank by bolts; by providing the cover, the accumulation tank can be directly accessed, which is more convenient for cleaning.

[0018] (III) Beneficial effects

[0019] The oil-water separator used for offshore oil production filters large particle impurities through a pretreatment mechanism, and then uses the centrifugal principle of the oil-water separation mechanism to achieve oil-water separation, and further purifies the separated water through a filter to meet the emission standards, thereby improving the efficiency and quality of oil-water separation and reducing maintenance costs. It has important practical application value for offshore oil production.

[0020] The oil-water separator used for offshore oil production has a fixed platform and a detachable stacking tank design, which makes the device more convenient and safer during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an oil-water separator used in offshore oil production;

[0022] Figure 2 A schematic diagram of the internal structure of an oil-water separator used in offshore oil production;

[0023] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 This is a schematic diagram of the explosion structure of a pretreatment mechanism in an oil-water separator used in offshore oil production.

[0025] In the figure:

[0026] 1. Oil-water separation mechanism; 11. Centrifugal tube; 111. Water inlet pipe; 12. Conical cyclone tube;

[0027] 13. Drain pipe; 14. Oil drain pipe;

[0028] 2. Pretreatment mechanism; 21. Filter tube; 211. Accumulation tank; 212. Cover; 22. Flange; 23. Filter screen;

[0029] 3. Water inlet valve;

[0030] 4. filter; 41. tube body; 411. flange joint; 42. bamboo charcoal filter layer; 43. membrane filter layer;

[0031] 5. Fixed platform; 51. Human ladder; 52. Guardrail; 53. Fixing parts. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example 1

[0034] See also Figure 1-Figure 3 The utility model provides a technical solution: an oil-water separator for offshore oil production, comprising a water inlet valve 3 and an oil-water separation mechanism 1.

[0035] The oil-water separation mechanism 1 and the water inlet valve 3 are connected via a pre-treatment mechanism 2 , and a filter 4 is provided at the drainage end of the oil-water separation mechanism 1 .

[0036] The oil-water separation mechanism 1 includes a centrifuge tube 11, a water inlet pipe 111 fixedly connected to the centrifuge tube 11 and tangent to the side of the centrifuge tube 11, a conical cyclone tube 12 fixedly connected to the bottom end of the centrifuge tube 11 and connected to the centrifuge tube 11, a drain pipe 13 fixedly connected to the bottom end of the conical cyclone tube 12 and connected to the conical cyclone tube 12, and an oil drain pipe 14 fixedly connected at the center position of the top end of the centrifuge tube 11 and extending to the top position of the conical cyclone tube 12, wherein the bottom end of the drain pipe 13 is fixedly connected to the filter 4, and a control valve is installed on the drain pipe 13.

[0037] The pretreatment mechanism 2 comprises a filter tube 21 whose two ends are respectively connected to the water inlet pipe 111 and the water inlet valve 3 through flanges 22 , and a filter screen 23 fixedly connected in the filter tube 21 .

[0038] The filter 4 includes a tube body 41, a flange joint 411 fixedly connected to the top end of the tube body 41 and connected to the bottom end of the drain pipe 13, a bamboo charcoal filter layer 42 fixedly connected to the flange joint 411 and located inside the tube body 41, and a membrane filter layer 43 sleeved on the outside of the bamboo charcoal filter layer 42 and located inside the tube body 41, and the top of the membrane filter layer 43 is fixedly connected to the inner wall of the flange joint 411.

[0039] When in use, the oil-water mixture is fed in through the water inlet valve 3, and then the large particles of impurities are filtered out when passing through the filter tube 21, and then enters the centrifuge tube 11 through the water inlet pipe 111. Since the water inlet pipe 111 is tangent to the side of the centrifuge tube 11, after the oil-water mixture enters the centrifuge tube 11, it rotates along the inner wall of the centrifuge tube 11 due to inertia, and the centrifugal force generated gradually separates the oil and water. Under the influence of gravity, the separated oil and water sink into the conical cyclone tube 12. As the circumference of the channel gradually decreases, the oil-water cyclone gradually The oil and water are separated quickly and efficiently. The separated water in the drain pipe 13 passes through the flange joint 411 and enters the pipe body 41. The separated water is filtered through the bamboo charcoal filter layer 42 and the membrane filter layer 43 one by one, and the separated water is further purified to meet the discharge standard, and then discharged from the pipe body 41.

[0040] Furthermore, the outside of the oil-water separation mechanism 1 is provided with a fixed platform 5 fixedly connected to the outer wall of the conical cyclone tube 12 through a fixing member 53, and a man-ladder 51 is provided on the fixed platform 5, and a guardrail 52 is fixedly installed on the man-ladder 51; the oil-water separation mechanism 1 is enclosed by the fixed platform 5 to support the outer shell of the oil-water separation mechanism 1, and is connected to the outer wall of the conical cyclone tube 12 through the fixing member 53 for fixing. During maintenance, the staff can climb up through the man-ladder 51 and be protected by the guardrail 52.

[0041] Example 2

[0042] See also Figure 4 A stacking groove 211 is provided at the bottom of the filter tube 21, and a cover 212 is fixedly installed on the stacking groove 211 by bolts; when the oil-water mixture passes through the filter tube 21, the impurities blocked by the filter screen 23 are precipitated in the stacking groove 211. When the device is idle, the impurities in the stacking groove 211 can be cleaned by removing the bolts and disassembling the cover 212, thereby facilitating regular maintenance.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil-water separator for offshore oil production, comprising a water inlet valve (3) and an oil-water separation mechanism (1), characterized in that: The oil-water separation mechanism (1) and the water inlet valve (3) are connected via a pre-treatment mechanism (2), and a filter (4) is provided at the drainage end of the oil-water separation mechanism (1); The oil-water separation mechanism (1) comprises a centrifugal tube (11), a water inlet pipe (111) fixedly connected to the centrifugal tube (11) and tangent to the side of the centrifugal tube (11), a conical cyclone tube (12) fixedly connected to the bottom end of the centrifugal tube (11) and in communication with the centrifugal tube (11), a drainage pipe (13) fixedly connected to the bottom end of the conical cyclone tube (12) and in communication with the conical cyclone tube (12), and an oil drainage pipe (14) fixedly connected to the center position of the top end of the centrifugal tube (11) and extending to the top end of the conical cyclone tube (12), wherein the bottom end of the drainage pipe (13) is fixedly connected to the inlet end of the filter (4); The pretreatment mechanism (2) comprises a filter tube (21) whose two ends are respectively connected to the water inlet pipe (111) and the water inlet valve (3) through flanges (22), and a filter screen (23) fixedly connected to the filter tube (21).

2. The oil-water separator for offshore oil production according to claim 1, characterized in that: The filter (4) comprises a tube body (41), a flange joint (411) fixedly connected to the top end of the tube body (41) and connected to the bottom end of the drain pipe (13), a bamboo charcoal filter layer (42) fixedly connected to the flange joint (411) and located inside the tube body (41), and a membrane filter layer (43) sleeved outside the bamboo charcoal filter layer (42) and located inside the tube body (41), wherein the top end of the membrane filter layer (43) is fixedly connected to the inner wall of the flange joint (411).

3. The oil-water separator for offshore oil production according to claim 2, characterized in that: The oil-water separation mechanism (1) is externally sleeved with a fixed platform (5) which is fixedly connected to the outer wall of the conical cyclone tube (12) via a fixing member (53).

4. The oil-water separator for offshore oil production according to claim 3, characterized in that: The fixed platform (5) is provided with a man ladder (51), and a guardrail (52) is fixedly installed on the man ladder (51).

5. The oil-water separator for offshore oil production according to claim 4, characterized in that: A control valve is installed on the drainage pipe (13).

6. The oil-water separator for offshore oil production according to claim 5, characterized in that: The bottom of the filter tube (21) is provided with an accumulation groove (211).

7. The oil-water separator for offshore oil production according to claim 6, characterized in that: A sealing cover (212) is fixedly mounted on the stacking groove (211) by means of bolts.

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