Electric field emulsion breaker

Abstract

The present invention provides an electric field demulsifier, which relates to the petroleum field and solves the problems of complex structure of the demulsifier, uneven electric field distribution and poor demulsification effect. The electric field demulsifier includes an electric field demulsification section, an inlet section for the inflow of the emulsion, and an outlet section for the outflow of the emulsion. The electric field demulsification section includes a shell, and a grounded electrode plate and a high-voltage insulating electrode electrically connected to a power source are arranged inside the shell. An independent space that is enclosed on all sides is defined between the grounded electrode plate and the shell and between adjacent grounded electrode plates, and a fluid channel is formed. At least one high-voltage insulating electrode is arranged in each independent space, and the high-voltage insulating electrode is arranged at intervals with respect to the shell and the grounded electrode plate. The fluid channel is communicated with the inlet section and the outlet section. This device makes the electric field distribution more uniform. When the dispersed-phase water particles of the crude oil emulsion enter the electric field demulsification section through the inlet section, under the action of appropriate turbulence and high-voltage electric field, the dispersed-phase water particles coalesce and collide, and the particle size increases, improving the demulsification effect.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum, and in particular to an electric field emulsion breaker. Background Art

[0002] Whether in the upstream crude oil exploitation or in the downstream petrochemical field, the problem of demulsification and dehydration of water-in-oil (W / O) emulsions is often encountered. Common methods for demulsifying water-in-oil (W / O) emulsions include thermal demulsification, chemical demulsification, electric field demulsification, etc. Among them, electric field demulsification has been widely used due to its advantages of high efficiency, environmental protection, energy saving, etc. The commonly used electric field demulsification and dehydration equipment is an electric dehydrator, and its working principle is to combine the electric field demulsification and the gravity sedimentation process into one. In order to ensure the smooth progress of gravity sedimentation, the conventional electric dehydrator maintains a laminar flow state in the tank layer, but this is contrary to the concept of promoting the collision and coalescence of dispersed-phase water particles by appropriate turbulence. In addition, the conventional electric dehydrator uses metal bare electrodes inside, and when a high voltage is applied, the phenomenon of electric field breakdown is likely to occur at high water contents.

[0003] In view of the above problems, researchers have proposed a dehydration scheme that separates the electric field demulsification and the gravity sedimentation process, that is, first implementing electric field demulsification and then implementing oil-water gravity sedimentation separation, and using insulating electrodes to participate in implementing electric field demulsification to prevent the formation of water chains between electrodes and cause short circuits when the water content is relatively high.

[0004] The applicant of the present invention has found that the prior art has at least the following technical problems: In the demulsifier of the prior art, the structure of the demulsifier is complex, and the setting structure of the electrode and the grounding insulator leads to uneven electric field distribution and poor demulsification effect. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric field emulsion breaker to solve the technical problems of complex structure of the demulsifier, uneven electric field distribution and poor demulsification effect existing in the prior art. The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The electric field emulsion breaker provided by the present invention includes an electric field demulsification section, an inlet section for the inflow of the emulsion, and an outlet section for the outflow of the emulsion, wherein:

[0008] The electric field demulsification section includes a shell, in which a grounded electrode plate and a high-voltage insulating electrode electrically connected to a power supply are arranged. An independent space that is enclosed on all sides and forms a fluid channel is defined between the grounded electrode plate and the shell and between adjacent grounded electrode plates. At least one high-voltage insulating electrode is arranged in each independent space, and the high-voltage insulating electrode is spaced from both the shell and the grounded electrode plate. The fluid channel is communicated with the inlet section and the outlet section.

[0009] Preferably, the grounded electrode plates are arranged vertically. In the independent space defined by adjacent grounded electrode plates, the cross-section of the independent space is an equilateral triangle or a regular polygon, and the corresponding high-voltage insulating electrode is located at the center of the independent space.

[0010] Preferably, the high-voltage insulating electrode includes an electrode tube. The number of electrode tubes includes one or more than two. At least part of the electrode tube is arranged vertically, and the vertical part of the electrode tube is located at the center of the independent space.

[0011] Preferably, the high-voltage insulating electrode includes an electrode tube. The number of electrode tubes is one. The electrode tube includes multiple vertical tube segments and bent tube segments. The vertical tube segments are located at the center of the independent space, and the bent tube segments are located at the ends of the vertical tube segments and connect adjacent vertical tube segments.

[0012] Preferably, the electric field demulsifier further includes an insulating cavity, which is located above the inlet section. A terminal connected to a power supply system is arranged in the insulating cavity. At least one end of the high-voltage insulating electrode extends into the insulating cavity and is electrically connected to the terminal; insulating oil is filled in the insulating cavity, and the high-voltage insulating electrode is isolated from the insulating cavity.

[0013] Preferably, the insulating cavity is defined by an upper cover and a bracket. A sealing connection assembly is arranged in the insulating cavity. The sealing connection assembly connects the terminal and one end of the high-voltage insulating electrode and seals and isolates the high-voltage insulating electrode from the insulating cavity.

[0014] Preferably, the sealing connection assembly includes an insulating sleeve, a pressing cylinder and a sleeve, where:

[0015] The insulating sleeve is fixedly connected to the lower part of the terminal. The pressing cylinder is fixed to the lower part of the insulating sleeve. The sleeve is fixed on the bracket. The pressing cylinder covers the end of the sleeve and is threadedly connected to the sleeve. One end of the high-voltage insulating electrode passes through the sleeve and the pressing cylinder and contacts the terminal.

[0016] Preferably, the sealed connection assembly further includes a rubber sealing portion which is clamped and fixed between the pressing cylinder and the sleeve. The joint surface between the rubber sealing portion and the sleeve is a conical surface, so as to seal between the pressing cylinder, the sleeve and the high-voltage insulating electrode. One end of the high-voltage insulating electrode sequentially passes through the sleeve, the rubber sealing portion and the pressing cylinder and contacts the terminal block.

[0017] Preferably, the electric field demulsifier includes an upper electrode bracket, an upper flange and upper studs, wherein:

[0018] The upper end of the high-voltage insulating electrode is fixed to the upper electrode bracket, and the upper end of the grounding electrode plate is fixed to the upper flange;

[0019] The upper electrode bracket and the upper flange are arranged at intervals in the vertical direction, and an inlet section is formed therebetween. The upper studs connect the upper electrode bracket and the upper flange, and adjacent upper studs are arranged at intervals. An inlet channel for the emulsion to flow in is defined among the upper electrode bracket, the upper flange and the upper studs.

[0020] Preferably, the electric field demulsifier includes a lower electrode bracket, a lower flange and lower studs, wherein:

[0021] The lower end of the high-voltage insulating electrode is fixed to the lower electrode bracket, and the lower end of the grounding electrode plate is fixed to the lower flange;

[0022] The lower end of the high-voltage insulating electrode is fixed to the lower electrode bracket. The lower electrode bracket and the lower flange are arranged at intervals in the vertical direction, and an outlet section is formed therebetween. The lower studs connect the lower electrode bracket and the lower flange, and adjacent lower studs are arranged at intervals. An outlet channel for the emulsion to flow out is defined among the lower electrode bracket, the lower flange and the lower studs.

[0023] Compared with the prior art, the electric field demulsifier provided by the present invention has the following beneficial effects: A high-voltage electric field is formed between the high-voltage insulating electrode and the grounding electrode plate and between the high-voltage insulating electrode and the shell, and at least one high-voltage insulating electrode is arranged in the independent space, which can make the electric field distribution more uniform. When the dispersed-phase water particles of the crude oil emulsion enter the electric field demulsification section through the inlet section, under the action of appropriate turbulence and high-voltage electric field, the dispersed-phase water particles coalesce and collide, and the particle size increases, improving the demulsification effect; The above structure is conducive to the rapid coalescence and growth of water particles in a relatively short time, with less energy consumption; At the same time, the structure has a certain compactness, is applicable to emulsions with different water contents, is convenient for processing and installation, and reduces the manufacturing cost. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a schematic diagram of the overall structure of the electric field demulsifier;

[0026] Figure 2 is a schematic diagram of the structure of the high-voltage insulating electrode;

[0027] Figure 3 is a schematic diagram of the connection structure between the terminal post and the high-voltage insulating electrode;

[0028] Figure 4 is a schematic diagram of the position of the vertical pipe section of the high-voltage insulating electrode when the cross-section of the independent space is an equilateral triangle;

[0029] Figure 5 is a schematic diagram of the position of the vertical pipe section of the high-voltage insulating electrode when the cross-section of the independent space is a square;

[0030] Figure 6 is a schematic diagram of the position of the vertical pipe section of the high-voltage insulating electrode when the cross-section of the independent space is a regular hexagon;

[0031] Figure 7 is a schematic diagram of the structure when the vertical pipe sections of the high-voltage insulating electrode are arranged in a square;

[0032] Figure 8 is a schematic diagram of the structure when the vertical pipe sections of the high-voltage insulating electrode are arranged in a corner square;

[0033] Figure 9 is a schematic diagram of the structure when the vertical pipe sections of the high-voltage insulating electrode are arranged in an equilateral triangle;

[0034] Figure 10 is a schematic diagram of the structure when the vertical pipe sections of the high-voltage insulating electrode are arranged in a corner equilateral triangle;

[0035] Figure 11 is a schematic diagram of an even arrangement method of the vertical pipe sections of the high-voltage insulating electrode in the independent space;

[0036] Figure 12 is a schematic diagram of an odd arrangement method of the vertical pipe sections of the high-voltage insulating electrode in the independent space.

[0037] In the figure: 1. Electric field demulsifier; 2. Insulation cavity; 3. Inlet section; 4. Electric field demulsification section; 5. Outlet section; 6. Cable; 7. Cable connection pipe; 8. Upper cover; 9. Terminal; 10. Insulating sleeve; 11. Pressing cylinder; 12. Rubber sealing part; 13. Sleeve; 14. Leg; 15. High-voltage insulating electrode; 151. Vertical pipe section; 152. Bent pipe section; 16. Bracket; 17. Upper electrode bracket; 18. Upper stud; 19. Upper flange; 20. Grounding electrode plate; 21. Shell; 22. Fluid channel; 23. Lower flange; 24. Lower stud; 25. Outlet channel; 26. Lower electrode bracket; 27. Transformer; 28. Power supply system. Detailed implementation mode

[0038] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0040] The embodiment of the present invention provides an electric field demulsifier, which is conducive to the rapid coalescence and growth of water particles in a short time, consumes less energy, and has a simple structure.

[0041] The following combines Figures 1 - 12 to elaborate on the technical solutions provided by the present invention in more detail.

[0042] As Figures 1 - 3As shown in the figure, this embodiment provides an electric field demulsifier 1, which includes an electric field demulsification section 4, an inlet section 3 for the inflow of the emulsion, and an outlet section 5 for the outflow of the emulsion. Among them: The electric field demulsification section 4 includes a shell 21. Inside the shell 21, a grounded electrode plate 20 and a high-voltage insulating electrode 15 electrically connected to a power source are provided. An independent space that is enclosed on all sides is formed between the grounded electrode plate 20 and the shell 21 and between adjacent grounded electrode plates 20, and a fluid channel 22 is formed. At least one high-voltage insulating electrode 15 is arranged in each independent space. The high-voltage insulating electrode 15 is arranged at intervals from both the shell 21 and the grounded electrode plate 20. The fluid channel 22 is communicated with the inlet section 3 and the outlet section 5.

[0043] Among them, the shell 21 is grounded. The above-mentioned independent space is a space that is open at the upper and lower ends and enclosed on all sides. Please refer to Figures 4 - 6 As shown in the figure, the above figure shows independent spaces with cross-sections of different shapes respectively. The crude oil emulsion flows into the electric field demulsification section 4 through the inlet section 3. When passing through the above-mentioned independent space, under the action of appropriate turbulence and high-voltage electric field, the dispersed-phase water particles coalesce and collide, and the particle size increases, and then flows out through the outlet section 5.

[0044] In the electric field demulsifier 1 of this embodiment, a high-voltage electric field is formed between the high-voltage insulating electrode 15 and the grounded electrode plate 20, and between the high-voltage insulating electrode 15 and the shell 21. And at least one of the high-voltage insulating electrodes 15 is arranged in the independent space, which can make the electric field distribution more uniform. When the dispersed-phase water particles of the crude oil emulsion enter the electric field demulsification section 4 through the inlet section 3, under the action of appropriate turbulence and high-voltage electric field, the dispersed-phase water particles coalesce and collide, and the particle size increases, improving the demulsification effect; the above structure is conducive to the water particles coalescing and growing faster in a shorter time, with less energy consumption; at the same time, the structure has a certain compactness, is suitable for emulsions with different water contents, is convenient for processing and installation, and reduces the manufacturing cost.

[0045] As an optional implementation manner, please refer to Figure 1 and Figure 2 As shown in the figure, the high-voltage insulating electrode 15 includes an electrode tube. The number of electrode tubes includes one or more than two. At least a part of the electrode tube is arranged vertically, and the vertical part of the electrode tube is located at the center position of the independent space. The electrode tube serves as the high-voltage insulating electrode 15. The part of the electrode tube located in the independent space is arranged vertically with the grounded electrode plate 20, which can improve the uniformity of the electric field distribution. Different electrode tubes can be used in each independent space, or the vertical tube sections 151 in all independent spaces are located in the same electrode tube.

[0046] As an optional implementation manner, please refer to Figure 1 and Figure 2As shown in the figure, the high-voltage insulating electrode 15 includes an electrode tube. The number of electrode tubes is one. The electrode tube includes multiple vertical tube segments 151 and bent tube segments 152. The vertical tube segments 151 are located at the central position of the independent space. The bent tube segments 152 are located at the ends of the vertical tube segments 151 and connect adjacent vertical tube segments 151. At least one end of the high-voltage insulating electrode 15 is located in the insulating cavity 2. When the number of vertical tube segments 151 of the high-voltage insulating electrode 15 is odd, the exposed end of the high-voltage insulating electrode 15 needs to be insulated and fixed.

[0047] See Figure 2 As shown in the figure, in this embodiment, the electric field demulsification section 4 only includes one electrode tube. Different vertical tube segments 151 of the electrode tube are located in different independent spaces and are connected to adjacent vertical tube segments 151 through bent tube segments 152. For the above structure, only a pair of terminal posts 9 need to be set to energize all the vertical tube segments 151 in the independent space and complete the layout of the high-voltage electric field, which can reduce the number of terminal posts 9 and simplify the electrode fixing and wiring methods.

[0048] The high-voltage insulating electrode 15 adopts a flexible conductive composite tube with an outer covering of insulating material. The insulating material can be perfluoroethylenepropylene, polytetrafluoroethylene, epoxy resin, polyethylene, polypropylene, etc., which can effectively prevent the short-circuit problem between the high-voltage insulating electrode 15 and the grounding electrode plate 20 and can be used in high water content working conditions. The outer shell 21 is made of steel material and is grounded. The grounding electrode plate 20 is processed and made of a stainless steel flat plate or a stainless steel mesh plate.

[0049] As an optional implementation method, the grounding electrode plate 20 is vertically arranged, which is convenient for the crude oil emulsion to flow down and is also convenient for the electric field distribution to be more uniform; see Figures 4 - 6 and see Figure 11 、 Figure 12 As shown in the figure, in the independent space surrounded by adjacent grounding electrode plates 20, the cross-section of the independent space is an equilateral triangle or a regular polygon, and the corresponding vertical tube segments 151 of the high-voltage insulating electrode 15 are located at the central position of the independent space.

[0050] In this embodiment, closed independent spaces are surrounded between the grounding electrode plate 20 and the shell 21 and between adjacent grounding electrode plates 20. Among them, in the independent space surrounded by adjacent grounding electrode plates 20, the high-voltage insulating electrode 15 (the vertical tube segments 151 of the high-voltage insulating electrode 15) is located at the central position of the independent space. In this way, the electric field distribution is more uniform, which is convenient for water particles to coalesce and grow more quickly when passing through the electric field demulsification section 4.

[0051] See Figure 11 and Figure 12As shown, in the independent space enclosed between the grounding electrode plate 20 and the shell 21, the cross-section may be of an irregular shape. To make full use of the space, the high-voltage insulating electrode 15 can also be arranged in the above-mentioned independent space.

[0052] See Figures 4 - 6 As shown, for the independent space formed by the grounding electrode plate 20, its cross-section is arranged in a triangular, square, or other polygonal shape. See Figures 7 - 10 As shown, when the grounding electrode plate 20 is arranged in a square shape, the vertical pipe section 151 of the high-voltage insulating electrode 15 includes four arrangement methods, namely square arrangement, equilateral triangle arrangement, corner square arrangement, and corner equilateral triangle arrangement; at the same time, it is divided into odd or even arrangements according to the parity of the number of pipes in the horizontal center line of the vertical pipe section 151 of the high-voltage insulating electrode 15, as Figure 11 and Figure 12 shown. The above arrangement method of the high-voltage insulating electrode 15 and the grounding electrode plate 20 not only makes the electric field distribution more uniform, but also enables the cross-section of the fluid channel 22 to be fully utilized without gaps.

[0053] As an alternative implementation, see Figure 1 shown, the electric field demulsifier 1 further includes an insulating cavity 2. The insulating cavity 2 is located above the inlet section 3. A terminal post 9 electrically connected to the power supply system 28 is arranged in the insulating cavity 2. At least one end of the high-voltage insulating electrode 15 extends into the insulating cavity 2 and is electrically connected to the terminal post 9; insulating oil is filled in the insulating cavity 2, and the high-voltage insulating electrode 15 is isolated from the insulating cavity 2. Specifically, the terminal post 9 is electrically connected to the transformer 27 and the power supply system 28 through a cable 6. The cable 6 is located in the cable connection pipe 7 to ensure safe power connection. Among them, the transformer 27 is an explosion-proof transformer 27, which is powered by a power supply system 28 of power frequency / high voltage or high frequency / high voltage and is placed outside the electric field demulsifier 1.

[0054] See Figure 1 , the function of the terminal post 9 in the insulating cavity 2 is to separate the electricity from the external crude oil. After the high-voltage insulating electrode 15 in the insulating cavity 2 is connected to the terminal post 9, insulating oil is filled in the insulating cavity 2 and the inside of the cable connection pipe 7. The insulating oil isolates the terminal post 9 from the peripheral wall of the insulating cavity 2 to prevent short-circuit phenomena and facilitate maintenance.

[0055] As an alternative implementation, see Figure 1 shown, the insulating cavity 2 is enclosed by an upper cover 8 and a bracket 16. A sealing connection assembly is arranged in the insulating cavity 2. The sealing connection assembly connects one end of the terminal post 9 and the high-voltage insulating electrode 15 and seals and isolates the high-voltage insulating electrode 15 from the insulating cavity 2. The above-mentioned sealing connection member seals and isolates the high-voltage insulating electrode 15 from the peripheral wall of the insulating cavity 2 to prevent open-circuit phenomena.

[0056] As an alternative implementation, see Figure 1 andFigure 3 As shown in the figure, the sealed connection assembly includes an insulating sleeve 10, a pressing cylinder 11, and a sleeve 13, where: the insulating sleeve 10 is fixedly connected to the lower part of the terminal 9, the pressing cylinder 11 is fixed to the lower part of the insulating sleeve 10, the sleeve 13 is fixed on the bracket 16, the pressing cylinder 11 covers the outer end of the sleeve 13 and is threadedly connected to the sleeve 13, and one end of the high-voltage insulating electrode 15 passes through the sleeve 13, the pressing cylinder 11 and contacts the terminal 9.

[0057] Specifically, referring to Figure 1 and Figure 3 As shown in the figure, the terminal 9 is fixedly connected to the insulating sleeve 13 through a wiring nut, the sleeve 13 is fixedly welded to the bracket 16, and communication cavities are provided in the sleeve 13, the pressing cylinder 11, and the insulating sleeve 10. When the pressing cylinder 11 covers the end of the sleeve 13 and the two are threadedly connected, the end of the high-voltage insulating electrode 15 sequentially passes through the communication cavities of the sleeve 13, the pressing cylinder 11, and the insulating sleeve 10 and is connected to the terminal 9, thereby realizing the energization of the high-voltage insulating electrode 15. The above structure facilitates the connection between the high-voltage insulating electrode 15 and the terminal 9 and at the same time prevents liquid from entering the insulating cavity 2.

[0058] As an optional implementation manner, in order to further improve the sealing performance of the insulating cavity 2, referring to Figure 3 As shown in the figure, the sealed connection assembly of this embodiment further includes a rubber sealing part 12. The rubber sealing part 12 is clamped and fixed between the pressing cylinder 11 and the sleeve 13. The joint surface between the rubber sealing part 12 and the sleeve 13 is a conical surface, so as to seal between the pressing cylinder 11, the sleeve 13, and the high-voltage insulating electrode 15. One end of the high-voltage insulating electrode 15 passes through the sleeve 13, the rubber sealing part 12, the pressing cylinder 11, and contacts the terminal 9.

[0059] The above structure forms effective sealing surfaces between the high-voltage insulating electrode 15 and the rubber sealing part 12, and between the rubber sealing parts 12, so that the high-voltage insulating electrode 15 is closely attached to the inside of the rubber sealing part 12. The rubber sealing part 12 is clamped between the pressing cylinder 11, the sleeve 13, and the high-voltage insulating electrode 15. Utilizing the elasticity of the rubber, the rubber sealing part 12 and the sleeve 13 can seal the gap between the two after the rubber sealing part 12 is deformed.

[0060] Referring to Figure 1 and Figure 3As shown, the terminal 9 is divided into upper and lower parts, both of which adopt a threaded structure. The upper part has a smaller diameter and is connected to the high-voltage cable 6 through a connection nut. The lower part has a larger diameter and is connected to the inner metal tube of the high-voltage insulating electrode 15 through a thread, preventing the problem that after the rubber sealing part 12 is deformed by force, pressure is applied to the high-voltage insulating electrode 15 to cause its deformation. When the crude oil emulsion flows in from the inlet section 3, since the rubber sealing part 12 is respectively in contact with the pressure cylinder 11, the high-voltage insulating electrode 15, and the surface of the sleeve 13, contact pressure is generated between the structures, and the contact pressure between the contact surfaces is higher than the liquid penetration pressure, effectively isolating the insulating cavity 2 from the inlet section 3 and preventing the liquid from flowing into the insulating cavity 2 through the gap between the sleeve 13 and the high-voltage insulating electrode 15.

[0061] As an optional implementation, refer to Figure 1 As shown, the electric field demulsifier 1 includes an upper electrode support 17, an upper flange 19, and upper studs 18, where: the upper end of the high-voltage insulating electrode 15 is fixed to the upper electrode support 17, and the upper end of the grounding electrode plate 20 is fixed to the upper flange 19 and grounded; the upper electrode support 17 and the upper flange 19 are arranged at intervals in the vertical direction, and an inlet section 3 is formed between them. The upper studs 18 connect the upper electrode support 17 and the upper flange 19, and the adjacent upper studs 18 are arranged at intervals. An inlet channel for the emulsion to flow in is enclosed among the upper electrode support 17, the upper flange 19, and the upper studs 18.

[0062] Refer to Figure 1 As shown, the above-mentioned sleeve 13 is fixed to the upper electrode support 17 through the leg 14, thereby realizing the fixation of the insulating cavity 2. The above structure realizes the fixation of the upper ends of the high-voltage insulating electrode 15 and the grounding electrode plate 20. In the inlet section 3, the crude oil emulsion can enter the fluid channel 22 through the inlet channel formed between the upper studs 18, the upper electrode support 17, and the upper flange 19, or can also enter the fluid channel 22 from the upper part of the upper electrode support 17, facilitating the more rapid and uniform flow of the crude oil into the fluid channel 22 of the inlet section 3 and the electric field demulsification section 4.

[0063] As an optional implementation, refer to Figure 1 As shown, the electric field demulsifier 1 includes a lower electrode support 26, a lower flange 23, and lower studs 24, where: the lower end of the high-voltage insulating electrode 15 is fixed to the lower electrode support 26, and the lower end of the grounding electrode plate 20 is fixed to the lower flange 23; the lower end of the high-voltage insulating electrode 15 is fixed to the lower electrode support 26 and grounded. The lower electrode support 26 and the lower flange 23 are arranged at intervals in the vertical direction, and an outlet section 5 is formed between them. The lower studs 24 connect the lower electrode support 26 and the lower flange 23, and the adjacent lower studs 24 are arranged at intervals. An outlet channel 25 for the emulsion to flow out is enclosed among the lower electrode support 26, the lower flange 23, and the lower studs 24. The above structure realizes the fixation of the lower ends of the high-voltage insulating electrode 15 and the grounding electrode plate 20.

[0064] In the outlet section 5, the crude oil emulsion can enter and exit the fluid channel 22 through the outlet channel 25 formed between the lower stud 24, the lower electrode support 26 and the lower flange 23, and can also enter and exit the fluid channel 22 from the lower part of the lower electrode support 26, facilitating the faster and more uniform outflow of the crude oil.

[0065] Among them, the fluid channel 22 is formed between the vertical pipe section 151 of the high-voltage insulating electrode 15 and the grounded electrode plate 20. When the crude oil emulsion flows through the fluid channel 22, the Reynolds number is maintained between 2000 and 8000. Under the action of the high-voltage electric field and appropriate turbulence, the dispersed-phase water particles can coalesce and grow as soon as possible.

[0066] During the working process of the electric field demulsifier 1 of this embodiment, when the crude oil emulsion flows outside the insulating cavity 2 and enters the fluid channel 22 of the electric field demulsification section 4 from the inlet section 3, the high-voltage cable 6 applies a high voltage to the high-voltage insulating electrode 15. Under the action of the high-voltage electric field between the two electrodes and appropriate turbulence, the dispersed-phase water particles coalesce and grow, and finally the emulsion is discharged from the outlet section 5.

[0067] As Figure 11 and Figure 12 shown, on the premise of adopting the square arrangement of the grounded electrode plate 20 and the square arrangement of the vertical pipe section 151 of the high-voltage insulating electrode 15, it is divided into odd arrangement or even arrangement according to the parity of the number of tubes in the horizontal center line of the vertical pipe section 151 of the high-voltage insulating electrode 15, and the specific arrangement method is determined according to the size of the shell 21.

[0068] For the electric field demulsifier 1 of this embodiment, when the size of the shell 21 is kept constant, a voltage of 5000V is applied to the high-voltage insulating electrode 15. Under the condition of ensuring the same number of vertical pipe sections 151 of the high-voltage insulating electrode 15, the COMSOL Multiphysics multi-physics simulation software is used to simulate the electric field strength of the cross-section between the upper electrode support 17 and the lower electrode support 26. One of them adopts the arrangement method of arranging the high-voltage insulating electrode 15 and the grounded metal pipe at intervals, and the other adopts the arrangement method of the high-voltage insulating electrode 15 and the grounded metal plate in this electric field demulsifier 1 (where the adjacent grounded metals enclose a closed independent space around, and the vertical pipe section 151 of the high-voltage insulating electrode 15 is located at the center of the independent space). The shell 21 is grounded in both arrangements. Refer to Table 1 below. The results show that when the arrangement method of the high-voltage insulating electrode 15 and the metal electrode pipe is adopted, the proportion of the electric field area above 1.5kV / cm is 23.09%, and the proportion of the electric field area above 1kV / cm is 49.71%; when the arrangement method of the high-voltage insulating electrode 15 and the grounded electrode plate 20 is adopted, the proportion of the electric field area greater than 1.5kV / cm is 51.98%, and the proportion of the electric field area greater than 1kV / cm is 66.37%. By comparison, it can be seen that when the combination method of the high-voltage insulating electrode 15 and the grounded electrode plate 20 is adopted, the electric field distribution is more uniform.

[0069] Table 1 Comparison of simulation results between the high-voltage insulation electrode and the insulation electrode plate layout mode of the present invention and other layout modes

[0070]

[0071] In the electric field demulsifier 1, during the working process, the Reynolds number Re of the crude oil emulsion can be maintained between 2000 and 8000, so that the dispersed-phase droplets coalesce and grow under appropriate turbulent flow. With this electric field demulsifier 1, when a voltage of 5000 V is applied to the high-voltage insulation electrode 15, the area ratio of the electric field strength region above 1.5 kV / cm is relatively high, and the electric field distribution is relatively uniform, which can enable water particles to coalesce and grow faster in a shorter time with less energy consumption. The high-voltage insulation electrode 15 with a single or multiple vertical pipe sections 151 combined with bent pipe sections 152 can reduce the number of terminal posts 9 and simplify the electrode fixing and wiring methods. The form of the electric field demulsification unit combined with the high-voltage insulation electrode 15 and the grounding electrode plate 20 is easy to process and install.

[0072] In the description of this specification, specific features, structures or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0073] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0074] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An electric field emulsion breaker, characterized in that, It includes an electric field demulsification section, an inlet section for the inflow of the emulsion, and an outlet section for the outflow of the emulsion, where: The electric field demulsification section includes a shell, and a grounded electrode plate and a high-voltage insulating electrode electrically connected to a power source are arranged inside the shell. An independent space that is closed all around is enclosed between the grounded electrode plate and the shell and between adjacent grounded electrode plates, and a fluid channel is formed. At least one high-voltage insulating electrode is arranged in each independent space, and the high-voltage insulating electrode is spaced from both the shell and the grounded electrode plate. The fluid channel is communicated with the inlet section and the outlet section; The grounded electrode plates are arranged vertically. In the independent space enclosed by adjacent grounded electrode plates, the cross-section of the independent space is an equilateral triangle or a regular polygon, and the corresponding high-voltage insulating electrode is located at the center of the independent space; The high-voltage insulating electrode includes an electrode tube. The number of the electrode tubes includes one or more than two. At least part of the electrode tube is arranged vertically, and the vertical part of the electrode tube is located at the center of the independent space; The electrode tube includes multiple vertical tube sections and bent tube sections. The vertical tube sections are located at the center of the independent space, and the bent tube sections are located at the ends of the vertical tube sections and connect adjacent vertical tube sections.

2. The electric field emulsion breaker according to claim 1, wherein The electric field demulsifier further includes an insulating cavity, which is located above the inlet section. A terminal connected to the power supply system is arranged in the insulating cavity. At least one end of the high-voltage insulating electrode extends into the insulating cavity and is electrically connected to the terminal; Insulating oil is poured into the insulating cavity, and the high-voltage insulating electrode is isolated from the insulating cavity.

3. The electric field emulsion breaker according to claim 2, characterized in that, The insulating cavity is enclosed by an upper cover and a bracket. A sealing connection assembly is arranged in the insulating cavity. The sealing connection assembly connects the terminal and one end of the high-voltage insulating electrode and seals and isolates the high-voltage insulating electrode from the insulating cavity.

4. The electric field emulsion breaker according to claim 3, characterized in that, The sealing connection assembly includes an insulating sleeve, a pressing cylinder, and a sleeve, where: The insulating sleeve is fixedly connected to the lower part of the terminal. The pressing cylinder is fixed to the lower part of the insulating sleeve. The sleeve is fixed on the bracket. The pressing cylinder covers the end of the sleeve and is threadedly connected to the sleeve. One end of the high-voltage insulating electrode passes through the sleeve, the pressing cylinder and contacts the terminal.

5. The electric field demulsifier according to claim 4, wherein The sealing connection assembly further includes a rubber sealing part, which is clamped and fixed between the pressing cylinder and the sleeve. The joint surface between the rubber sealing part and the sleeve is a conical surface, so as to seal between the pressing cylinder, the sleeve and the high-voltage insulating electrode. One end of the high-voltage insulating electrode passes through the sleeve, the rubber sealing part and the pressing cylinder in sequence and contacts the terminal.

6. The electric field emulsion breaker according to claim 1, characterized in that, The electric field demulsifier includes an upper electrode bracket, an upper flange, and upper studs, where: The upper end of the high-voltage insulating electrode is fixed to the upper electrode bracket, and the upper end of the grounded electrode plate is fixed to the upper flange; The upper electrode bracket and the upper flange are arranged at intervals in the vertical direction, and the inlet section is formed therebetween. The upper stud connects the upper electrode bracket and the upper flange, and adjacent upper studs are arranged at intervals. An inlet channel for the inflow of the emulsion is defined among the upper electrode bracket, the upper flange and the upper studs.

7. The electric field emulsion breaker according to claim 6, wherein, The electric field demulsifier includes a lower electrode bracket, a lower flange and lower studs, wherein: The lower end of the high-voltage insulating electrode is fixed to the lower electrode bracket, and the lower end of the grounding electrode plate is fixed to the lower flange; The lower end of the high-voltage insulating electrode is fixed to the lower electrode bracket. The lower electrode bracket and the lower flange are arranged at intervals in the vertical direction, and the outlet section is formed therebetween. The lower studs connect the lower electrode bracket and the lower flange, and adjacent lower studs are arranged at intervals. An outlet channel for the outflow of the emulsion is defined among the lower electrode bracket, the lower flange and the lower studs.

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