Combined crude oil demulsifier

Abstract

The utility model belongs to crude oil dehydration processing technical field, concretely relates to a combined crude oil demulsification device. The device includes impeller stirring section and baffle stirring section, and impeller stirring section and baffle stirring section are connected in series and are connected on emulsified oil pipe, to stir the emulsified oil of current and then reduce the stability of emulsified layer in emulsified oil. The utility model destroys the effective structure of emulsified layer in emulsified oil through the shear force generated by impeller stirring section and baffle stirring section, improves the dehydration effect of emulsified oil, and maintains the long-term stable operation of the crude oil dehydration system of the joint station at the rear end.

Description

Technical Field

[0001] This utility model belongs to the field of crude oil dehydration technology, specifically relating to a combined crude oil demulsification device. Background Technology

[0002] As oilfield development progresses, various oil production additives are required in large quantities during the oil extraction process. The use of these additives makes the composition of the produced fluid more complex. In addition, some oilfields produce crude oil with high density, high viscosity, and strong polarity, which easily forms stable emulsions with water under the action of asphaltenes and displacement additives. This leads to increased difficulty in demulsification and frequent disruptions in the crude oil dehydration system of the joint station, thereby affecting the quality of exported crude oil products.

[0003] Therefore, how to demulsify crude oil to a certain extent before it enters the combined terminal, thereby reducing the demulsification burden on the terminal, improving the crude oil dehydration effect, and maintaining the long-term stable operation of the crude oil dehydration system, has become an urgent technical problem to be solved. Utility Model Content

[0004] In view of this, the present invention provides a combined crude oil demulsification device to solve the technical problems such as the difficulty of demulsifying crude oil entering the joint station.

[0005] The combined crude oil demulsification device includes: The impeller mixing section includes an impeller mixing cylinder, an impeller disposed inside the impeller mixing cylinder, an impeller central shaft passing through the impeller from the center, two impeller bearings sleeved at both ends of the impeller central shaft, and two impeller supports that support the two impeller bearings respectively. The outer edge of the impeller support abuts against the inner wall of the impeller mixing cylinder. The baffle stirring section includes a baffle stirring cylinder and a baffle plate disposed inside the baffle stirring cylinder. The impeller stirring section and the baffle stirring section are configured in series and can be connected to the emulsified oil pipe to stir the flowing emulsified oil and reduce the stability of the emulsion layer in the emulsified oil.

[0006] As an extension of the above technical solution, the present invention also provides the following embodiments: There are at least two impellers arranged along the axial direction of the impeller central axis, each impeller including at least three blades, and adjacent two impellers are arranged at a certain angle in the circumferential direction.

[0007] At least two baffles are provided along the axial direction of the baffle stirring cylinder. The baffles are constructed as a cross-shaped frame structure with their ends abutting against the inner wall of the baffle stirring cylinder, and adjacent baffles are arranged at a certain angle in the circumferential direction.

[0008] The baffle stirring section includes two fixing rings disposed on both sides of the baffle and several fixing strips arranged along the axial direction of the baffle stirring cylinder and connected between the two fixing rings. The end of each baffle is configured to be connected to one of the fixing strips. The baffle, the fixing strips and the fixing rings together form a baffle assembly with a frame structure.

[0009] A retaining ring is provided downstream of the baffle assembly. The retaining ring is configured to connect with the inner wall of the baffle stirring cylinder to limit the position of the baffle assembly.

[0010] The impeller mixing section is located upstream of the baffle mixing section.

[0011] An impeller section blind plate is detachably installed at the free end of the impeller mixing cylinder, and a baffle section blind plate is detachably installed at the free end of the baffle mixing cylinder. An inlet is provided on the side wall of the impeller mixing cylinder, and an outlet is provided on the side wall of the baffle mixing cylinder.

[0012] The liquid inlet is located upstream of all the impellers, and the liquid outlet is located downstream of all the baffles.

[0013] It includes a bypass pipe, an inlet pipe connecting the inlet to the bypass pipe, and an outlet pipe connecting the outlet to the bypass pipe. A bypass valve, an inlet valve, and an outlet valve are respectively provided on the bypass pipe, the inlet pipe, and the outlet pipe.

[0014] An inlet pressure gauge and an outlet pressure gauge are respectively installed on the inlet pipe and the outlet pipe.

[0015] The advantages of this invention compared to the prior art are as follows: By setting up impeller stirring section and baffle stirring section, shear force can be generated on the flowing emulsified oil, thereby destroying the effective structure of the emulsion layer in the emulsified oil, reducing the stability and viscosity of the emulsion layer, thereby reducing the demulsification burden of the downstream combined station, improving the dehydration effect of the emulsified oil, and maintaining the long-term stable operation of the crude oil dehydration system of the combined station. Attached Figure Description

[0016] Figure 1 A schematic diagram of the combined crude oil demulsification device 100 provided by this utility model; Figure 2 for Figure 1 Schematic diagram of section AA; Figure 3 for Figure 1 A schematic diagram of the structure of the BB section.

[0017] All the accompanying drawings in this invention are schematic diagrams for illustrating the structure and principle, and are not necessarily drawn according to actual dimensions and proportions.

[0018] The specific meanings of the various labels in the figure are as follows: 1. Impeller stirring section; 11. Impeller stirring cylinder; 111. Liquid inlet; 12. Impeller; 121. Blade; 13. Impeller central shaft; 14. Impeller bearing; 15. Impeller support; 16. Impeller section blind flange; 2. Baffle stirring section; 21. Baffle stirring cylinder; 211. Liquid outlet; 22. Baffle; 23. Fixing strip; 24. Fixing ring; 25. Baffle ring; 26. Baffle section blind flange; 3. Bypass pipe; 31. Bypass valve; 4. Liquid inlet pipe; 41. Liquid inlet valve; 5. Liquid outlet pipe; 51. Liquid outlet valve; 100. Combined crude oil demulsification device. Detailed Implementation

[0019] The embodiments of this utility model will now be described in more detail with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the combined crude oil demulsification device 100 provided by this utility model. As shown in the figure, the combined crude oil demulsification device 100 includes an impeller stirring section 1 and a baffle stirring section 2. The impeller stirring section 1 includes an impeller stirring cylinder 11 with openings at both ends, an impeller 12 disposed inside the impeller stirring cylinder 11, an impeller central shaft 13 passing through the impeller 12 from the center, two impeller bearings 14 sleeved at both ends of the impeller central shaft 13, and two impeller supports 15 that support the two impeller bearings 14 respectively. The outer edge of the impeller support 15 abuts against the inner wall of the impeller stirring cylinder 11 to support the impeller bearings 14 and the impeller central shaft 13. The baffle stirring section 2 includes a baffle stirring cylinder 21 with openings at both ends and a baffle 22 disposed inside the baffle stirring cylinder 21. Furthermore, the impeller stirring section 1 and the baffle stirring section 2 are configured in series and can be connected to the emulsion oil pipe (not shown) that transports the emulsion oil, so as to stir the emulsion oil flowing through it and thereby reduce the stability of the emulsion layer in the emulsion oil.

[0021] In practical operation, the combined crude oil demulsifier 100 provided by this utility model is connected to the emulsified oil pipe. After the emulsified oil flows through the impeller stirring section 1 and the baffle stirring section 2, it flows into the combined station (not shown) for dehydration treatment. When the emulsified oil flows through the impeller stirring section 1, the impeller 12 rotates under the impact of the emulsified oil flow, and the rotating impeller repeatedly cuts the emulsified oil. When the emulsified oil flows through the baffle stirring section 2, the baffle 22 set inside the baffle stirring cylinder 21 can shear and mix the flowing emulsified oil, producing a static stirring effect.

[0022] The shear force and mixing action applied to the emulsified oil by the impeller mixing section 1 and the baffle mixing section 2 disrupt the original oil-water interface balance and the balance of the oil-water encapsulation structure inside the emulsified oil, thereby damaging the stability of the emulsion layer. This allows oil and water droplets to recombine, reducing the viscosity of the emulsified oil. Consequently, this significantly reduces the difficulty of dehydrating the incoming emulsified oil at the combined station, improves the dehydration effect, and maintains the long-term stable operation of the combined station's dehydration system.

[0023] like Figure 3 As shown, in some embodiments of this utility model, the impeller support 15 is constructed in a cross shape.

[0024] In some embodiments of this utility model, the impeller bearing 14 is a roller bearing.

[0025] like Figure 1 and Figure 3 As shown, in some embodiments of this invention, at least two impellers 12 are arranged along the axial direction of the impeller central shaft 13. Each impeller 12 includes at least three blades 121, and adjacent impellers 12 are staggered at a certain angle in the circumferential direction. This arrangement of multiple impellers 12 and staggered blades 121 in different impellers 12 is beneficial for providing more thorough and comprehensive shearing and mixing action on the flowing emulsified oil, thereby achieving a better demulsification effect.

[0026] Preferably, there are four impellers 12, and each impeller 12 is provided with four blades 121.

[0027] Preferably, the blade 121 is fan-shaped.

[0028] like Figure 1 and Figure 2As shown, in some embodiments of this utility model, at least two baffles 22 are arranged along the axial direction of the baffle stirring cylinder 21. The baffles 22 are constructed as a cross-shaped frame structure with their ends abutting against the inner wall of the baffle stirring cylinder 21, and adjacent baffles 22 are staggered at a certain angle in the circumferential direction. This design facilitates a more thorough and comprehensive shearing and mixing action on the flowing emulsified oil, thereby achieving a better demulsification effect.

[0029] Preferably, the baffle 22 is constructed as a centrally symmetrical cross-shaped frame structure, and the central axis of the baffle 22 coincides with the central axis of the baffle stirring cylinder 21.

[0030] Preferably, two adjacent baffles 22 are staggered by 45°.

[0031] like Figure 1 As shown, in some embodiments of this utility model, the number of baffles 22 is 4.

[0032] In some embodiments of this utility model, the baffle plate 22 is welded from stainless steel plate or stainless steel pipe.

[0033] like Figure 1 As shown, in some embodiments of this utility model, the baffle stirring section 2 includes two fixing rings 24 disposed on both sides of the baffle 22 and a plurality of fixing strips 23 arranged along the axial direction of the baffle stirring cylinder 21 and connected between the two fixing rings 24. The end of each baffle 22 is configured to be connected to a fixing strip 23. The baffle 22, fixing strips 23 and fixing rings 24 together form a baffle assembly with a frame structure. Through this design, an integral frame structure baffle assembly is formed, thereby improving the stability and integrity of the baffle 22, thereby improving the reliability of the combined crude oil demulsification device 100, and helping to fully exert the fixing and stirring function of the baffle 22.

[0034] Preferably, there are 4 baffles 22, and when two adjacent baffles 22 are staggered by 45°, there are 8 fixing strips 23, and each fixing strip 23 is connected to one end of two spaced baffles 22.

[0035] like Figure 1 As shown, in some embodiments of this utility model, a retaining ring 25 is provided downstream of the baffle assembly. The retaining ring 25 is configured to connect with the inner wall of the baffle stirring cylinder 21 to limit the position of the baffle assembly, thereby improving the stability of the baffle assembly installation. Obviously, the retaining ring 25 should abut against the baffle assembly to better perform the limiting function.

[0036] Preferably, the baffle ring 25 is detachably connected to the inner wall of the baffle stirring cylinder 21 to facilitate the installation and removal of the baffle assembly.

[0037] More preferably, the baffle ring 25 and the baffle plate stirring cylinder 21 can be connected in various ways that enable detachable connection, such as magnetic connection, threaded connection or telescopic snap-fit ​​connection.

[0038] like Figure 1 As shown, in some embodiments of this utility model, the impeller stirring section 1 is located upstream of the baffle stirring section 2. Since the impeller stirring section 1 can generate more intense shearing and mixing effects compared to the baffle stirring section 2, this design allows the emulsified oil to first undergo dynamic stirring in the impeller stirring section 1, primarily disrupting the stable structure of the emulsified oil, and then undergo static stirring in the baffle stirring section 2, primarily causing the separated oil and water to automatically agglomerate and aggregate, forming larger oil and water droplets. This overall improves the demulsification effect of the combined crude oil demulsifier 100 on the emulsified oil.

[0039] like Figure 1 As shown, in some embodiments of this utility model, an impeller section blind plate 16 is detachably provided at the free end of the impeller stirring cylinder 11, and a baffle section blind plate 26 is detachably provided at the free end of the baffle stirring cylinder 21. An inlet 111 is provided on the side wall of the impeller stirring cylinder 11, and an outlet 211 is provided on the side wall of the baffle stirring cylinder 21. With this design, when blockage occurs in the impeller stirring section 1 and the baffle stirring section 2, the impeller 12 and the baffle 22 can be removed by opening the impeller section blind plate 16 and the baffle section blind plate 26 to unclog the impeller stirring cylinder 11 and the baffle stirring cylinder 21, and to clean the impeller 12 and the baffle 22, thereby quickly eliminating equipment blockages and ensuring the normal operation of the combined crude oil demulsification device 100.

[0040] Preferably, both the impeller mixing cylinder 11 and the baffle mixing cylinder 21 have flange faces at their free ends. The impeller section blind plate 16 and the baffle section blind plate 26 are constructed to correspond to the respective flange faces. Furthermore, the impeller section blind plate 16 and the baffle end blind plate 26 are detachably connected to the impeller mixing cylinder 11 and the baffle mixing cylinder 21 by means of bolts.

[0041] like Figure 1 As shown, in some embodiments of this utility model, flange faces are provided on the opposite end faces of the impeller mixing cylinder 11 and the baffle mixing cylinder 21, and the impeller mixing cylinder 11 and the baffle mixing cylinder 21 are connected by bolts.

[0042] like Figure 1As shown, in some embodiments of this invention, the inlet 111 is located upstream of all impellers 12, and the outlet 211 is located downstream of all baffles 22. This design enables all impellers 12 and baffles 22 to be used to stir and mix the flowing emulsified oil, thereby maximizing the utilization of the combined crude oil demulsifier 100.

[0043] like Figure 1 As shown, in some embodiments of this utility model, the combined crude oil demulsification device 100 includes a bypass pipe 3, an inlet pipe 4 connecting the inlet port 111 to the bypass pipe 3, and an outlet pipe 5 connecting the outlet port 211 to the bypass pipe 3. A bypass valve 31, an inlet valve 41, and an outlet valve 51 are respectively installed on the bypass pipe 3, the inlet pipe 4, and the outlet pipe 5. In actual operation, both ends of the bypass pipe 3 are connected to the emulsified oil pipe. Under normal operating conditions, the bypass valve 31 is closed, and the inlet valve 41 and the outlet valve 51 are opened, allowing the emulsified oil to flow through the impeller stirring section 1 and the baffle stirring section 2 for demulsification. When cleaning of the impeller mixing section 1 and the baffle mixing section 2 is required, the bypass valve 31 is opened, and the inlet valve 41 and the outlet valve 51 are closed, allowing the emulsion to flow directly into the downstream equipment through the bypass pipe 3. This facilitates cleaning and troubleshooting of the impeller mixing section 1 and the baffle mixing section 2. This design enables troubleshooting of the combined crude oil demulsifier 100 without interrupting the emulsion oil flow, thus facilitating troubleshooting and enhancing the adaptability of the combined crude oil demulsifier 100 to various complex operating conditions.

[0044] like Figure 1 As shown, in some embodiments of this utility model, an inlet pressure gauge and an outlet pressure gauge are respectively installed on the inlet pipe 4 and the outlet pipe 5. This design allows for the determination, based on practical experience, that when the reading of the inlet pressure gauge exceeds the reading of the outlet pressure gauge by a certain value, such as 0.1 MPa, it can be determined that the combined crude oil demulsification device 100 is internally blocked and requires cleaning. This enhances the ability to identify and judge whether a blockage has occurred inside the combined crude oil demulsification device 100, and improves the level of safe and stable operation of the device.

[0045] According to the combined crude oil demulsifier 100 of this utility model, by setting up the impeller stirring section 1 and the baffle stirring section 2, shear force can be generated on the flowing emulsified oil, thereby destroying the effective structure of the emulsion layer in the emulsified oil, reducing the stability and viscosity of the emulsion layer and the demulsification burden of the downstream combined station, improving the dehydration effect of the emulsified oil, and maintaining the long-term stable operation of the crude oil dehydration system of the combined station.

[0046] In this utility model, the specific meanings of terms such as "upper," "lower," "left," "right," "inner," "outer," "middle," and "side" when indicating location are as follows: Figure 1 The drawing state of the combined crude oil demulsification unit 100 is for reference.

[0047] In this invention, "connection" includes "direct connection" and "indirect connection".

[0048] Finally, it should be noted that although the present invention has been described in detail with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A combined crude oil demulsification device, characterized in that: include: The impeller stirring section (1) includes an impeller stirring cylinder (11), an impeller (12) disposed inside the impeller stirring cylinder (11), an impeller central shaft (13) passing through the impeller (12) from the center, two impeller bearings (14) sleeved at both ends of the impeller central shaft (13), and two impeller supports (15) that support the two impeller bearings (14) respectively. The outer edge of the impeller support (15) abuts against the inner wall of the impeller stirring cylinder (11). The baffle stirring section (2) includes a baffle stirring cylinder (21) and a baffle (22) disposed inside the baffle stirring cylinder (21). The impeller stirring section (1) and the baffle stirring section (2) are configured in series and can be connected to the emulsified oil pipe to stir the emulsified oil flowing through, thereby reducing the stability of the emulsion layer in the emulsified oil.

2. The combined crude oil demulsification device according to claim 1, characterized in that: There are at least two impellers (12) arranged along the axial direction of the impeller central axis (13), each impeller (12) includes at least three blades (121), and two adjacent impellers (12) are arranged at a certain angle staggered in the circumferential direction.

3. The combined crude oil demulsification device according to claim 2, characterized in that: There are at least two baffles (22) arranged along the axial direction of the baffle stirring cylinder (21). The baffles (22) are constructed as a cross-shaped frame structure whose ends abut against the inner wall of the baffle stirring cylinder (21), and two adjacent baffles (22) are staggered at a certain angle in the circumferential direction.

4. The combined crude oil demulsification device according to claim 3, characterized in that: The baffle stirring section (2) includes two fixing rings (24) disposed on both sides of the baffle (22) and a number of fixing strips (23) arranged along the axial direction of the baffle stirring cylinder (21) and connected between the two fixing rings (24). The end of each baffle (22) is configured to be connected to one of the fixing strips (23). The baffle (22), the fixing strips (23) and the fixing rings (24) together form a baffle assembly with a frame structure.

5. The combined crude oil demulsification device according to claim 4, characterized in that: A retaining ring (25) is provided downstream of the baffle assembly. The retaining ring (25) is configured to connect with the inner wall of the baffle stirring cylinder (21) to limit the position of the baffle assembly.

6. The combined crude oil demulsification device according to any one of claims 1 to 5, characterized in that: The impeller mixing section (1) is located upstream of the baffle mixing section (2).

7. The combined crude oil demulsification device according to claim 6, characterized in that: An impeller section blind plate (16) is detachably provided at the free end of the impeller stirring cylinder (11), and a baffle section blind plate (26) is detachably provided at the free end of the baffle stirring cylinder (21). An inlet (111) is provided on the side wall of the impeller stirring cylinder (11), and an outlet (211) is provided on the side wall of the baffle stirring cylinder (21).

8. The combined crude oil demulsification device according to claim 7, characterized in that: The inlet (111) is located upstream of all the impellers (12), and the outlet (211) is located downstream of all the baffles (22).

9. The combined crude oil demulsification device according to claim 8, characterized in that: It includes a bypass pipe (3), an inlet pipe (4) that connects the inlet port (111) to the bypass pipe (3), and an outlet pipe (5) that connects the outlet port (211) to the bypass pipe (3). A bypass valve (31), an inlet valve (41), and an outlet valve (51) are respectively provided on the bypass pipe (3), the inlet pipe (4), and the outlet pipe (5).

10. The combined crude oil demulsification device according to claim 9, characterized in that: An inlet pressure gauge and an outlet pressure gauge are respectively installed on the inlet pipe (4) and the outlet pipe (5).

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