CN116103058A - Electric field demulsifier - Google Patents

Abstract

The invention provides an electric field demulsifier, relates to the field of petroleum, and solves the problems of complex structure, uneven electric field distribution and poor demulsification effect of the demulsifier. The electric field demulsifier comprises an electric field demulsification section, an inlet section for inflow of emulsion and an outlet section for outflow of emulsion, wherein the electric field demulsification section comprises a tube shell, a grounding electrode plate and high-voltage insulating electrodes electrically connected with a power supply are arranged in the tube shell, independent spaces with sealed periphery are enclosed between the grounding electrode plate and the tube shell and between adjacent grounding electrode plates, a fluid channel is formed, at least one high-voltage insulating electrode is arranged in each independent space, the high-voltage insulating electrodes are arranged at intervals with the tube shell and the grounding electrode plate, and the fluid channel is communicated with the inlet section and the outlet section. The device makes electric field distribution more even, after the dispersed phase water granule of crude oil emulsion gets into electric field demulsification section through the entry section, under appropriate turbulent flow and high-voltage electric field effect, particle diameter increase after the dispersed phase water granule coalescence, collision improves the demulsification effect.

Description

Electric field demulsifier

Technical Field

The invention relates to the technical field of petroleum, in particular to an electric field demulsifier.

Background

Whether in the upstream or downstream petrochemical fields, demulsification and dehydration problems are often encountered with water-in-oil (W/O) emulsions. Common water-in-oil (W/O) emulsion breaking methods include thermal breaking, chemical breaking, electric field breaking and the like, wherein the electric field breaking is widely applied due to the advantages of high efficiency, environmental protection, energy saving and the like. The common electric field demulsification dehydration equipment is an electric dehydrator, and the working principle of the electric field demulsification dehydration equipment is to integrate the electric field demulsification and gravity sedimentation processes, so that in order to ensure that gravity sedimentation is smoothly carried out, the conventional electric dehydrator keeps a laminar flow state in a tank, but the principle is contrary to the concept that proper turbulence promotes the collision and coalescence of dispersed phase water particles. In addition, the inside of the conventional electric dehydrator adopts a metal bare electrode, and when high voltage is applied, the phenomenon of collapsing an electric field easily occurs under high water content.

In order to solve the above problems, researchers have proposed a dehydration scheme that separates the electric field demulsification from the gravity sedimentation process, that is, implements the electric field demulsification first and then implements the gravity sedimentation separation of oil and water, and employs insulated electrodes to participate in implementing the electric field demulsification, so as to prevent the formation of water chains between the electrodes when the water content is high, thereby causing short circuit.

The applicant found that the prior art has at least the following technical problems: in the demulsifier in the prior art, the demulsifier has a complex structure, and the arrangement structure of the electrode and the grounding insulating piece causes uneven electric field distribution and poor demulsification effect.

Disclosure of Invention

The invention aims to provide an electric field demulsifier to solve the technical problems of complex structure, uneven electric field distribution and poor demulsification effect of the demulsifier in the prior art _。 The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the invention provides an electric field demulsifier, which comprises an electric field demulsification section, an inlet section for inflow of emulsion and an outlet section for outflow of emulsion, wherein:

the electric field demulsification section comprises a tube shell, a grounding electrode plate and a high-voltage insulating electrode electrically connected with a power supply are arranged in the tube shell, a peripheral enclosed independent space is enclosed between the grounding electrode plate and the tube shell and between the adjacent grounding electrode plates, a fluid channel is formed, at least one high-voltage insulating electrode is arranged in each independent space, the high-voltage insulating electrodes are arranged with the tube shell and the grounding electrode plate at equal intervals, and the fluid channel is communicated with the inlet section and the outlet section.

Preferably, the ground electrode plates are vertically arranged, and in the independent space enclosed by the adjacent ground electrode plates, the cross section of the independent space is in a regular triangle or a regular polygon, and the high-voltage insulating electrode is correspondingly positioned at the center of the independent space.

Preferably, the high-voltage insulated electrode comprises electrode tubes, the number of the electrode tubes comprises one or more than two, at least part of the electrode tubes are vertically arranged, and the vertical part of the electrode tubes is positioned at the center position of the independent space.

Preferably, the high-voltage insulated electrode comprises electrode tubes, the number of the electrode tubes is one, the electrode tubes comprise a plurality of sections of vertical tube sections and bent tube sections, the vertical tube sections are positioned at the central positions of the independent spaces, and the bent tube sections are positioned at the end parts of the vertical tube sections and are connected with adjacent vertical tube sections.

Preferably, the electric field demulsifier further comprises an insulation cavity, the insulation cavity is located above the inlet section, a binding post electrically connected with a power supply system is arranged in the insulation cavity, and at least one end of the high-voltage insulation electrode extends into the insulation cavity to be electrically connected with the binding post; insulating oil is filled in the insulating cavity, and the high-voltage insulating electrode is isolated from the insulating cavity.

Preferably, the insulating cavity is formed by enclosing an upper cover and a bracket, a sealing connection assembly is arranged in the insulating cavity, the sealing connection assembly is connected with one ends of the binding posts and the high-voltage insulating electrodes, and the high-voltage insulating electrodes and the insulating cavity are mutually sealed and isolated.

Preferably, the sealing connection assembly comprises an insulating sleeve, a pressing cylinder and a sleeve, wherein:

the insulation sleeve is fixedly connected to the lower portion of the binding post, the pressing cylinder is fixed to the lower portion of the insulation sleeve, the sleeve is fixed to the support, the pressing cylinder is covered outside the end portion of the sleeve and is in threaded connection with the sleeve, and one end of the high-voltage insulation electrode penetrates through the sleeve, the pressing cylinder and is in contact with the binding post.

Preferably, the sealing connection assembly further comprises a rubber sealing part, the rubber sealing part is clamped and fixed between the pressing cylinder and the sleeve, and a joint surface between the rubber sealing part and the sleeve is a conical surface, so that the pressing cylinder, the sleeve and the high-voltage insulated electrode are sealed, and one end of the high-voltage insulated electrode sequentially penetrates through the sleeve, the rubber sealing part and the pressing cylinder and is in contact with the binding post.

Preferably, the electric field demulsifier comprises an upper electrode bracket, an upper flange and an upper stud, wherein:

the upper end of the high-voltage insulating electrode is fixed with the upper electrode bracket, and the upper end of the grounding electrode plate is fixed with the upper flange;

the upper electrode support and the upper flange are arranged at intervals in the vertical direction, an inlet section is formed between the upper electrode support and the upper flange, the upper studs are connected with the upper electrode support and the upper flange, the upper studs are arranged adjacently at intervals, and an inlet channel for inflow of emulsion is enclosed between the upper electrode support, the upper flange and the upper studs.

Preferably, the electric field demulsifier comprises a lower electrode bracket, a lower flange and a lower stud, wherein:

the lower end of the high-voltage insulating electrode is fixed with the lower electrode bracket, and the lower end of the grounding electrode plate is fixed with the lower flange;

the lower end of the high-voltage insulated electrode is fixed with the lower electrode support, the lower electrode support and the lower flange are arranged at intervals in the vertical direction, an outlet section is formed between the lower electrode support and the lower flange, the lower studs are connected with the lower electrode support and the lower flange, adjacent lower studs are arranged at intervals, and an outlet channel for emulsion to flow out is arranged between the lower electrode support, the lower flange and the lower studs in a surrounding mode.

Compared with the prior art, the electric field demulsifier provided by the 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 tube shell, and at least one high-voltage insulating electrode is arranged in the independent space, so that the electric field distribution is more uniform, when dispersed phase water particles of the crude oil emulsion enter an electric field demulsification section through an inlet section, under the action of proper turbulence and high-voltage electric field, the particle size of the dispersed phase water particles is increased after coalescence and collision, and the demulsification effect is improved; the structure is beneficial to the rapid aggregation and growth of water particles in a short time, and the energy consumption is low; meanwhile, the structure has certain compactness, is suitable for emulsion with different water contents, is convenient to process and install, and reduces the manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of an electric field demulsifier;

FIG. 2 is a schematic view of a high voltage insulated electrode structure;

FIG. 3 is a schematic diagram of the connection structure of the terminal post and the high-voltage insulated electrode;

FIG. 4 is a schematic view of the position of the vertical tube section of the high voltage insulated electrode when the cross section of the independent space is an equilateral triangle;

FIG. 5 is a schematic illustration of the position of the vertical tube section of the high voltage insulated electrode when the cross section of the independent space is square;

FIG. 6 is a schematic view of the position of the vertical tube section of the high voltage insulated electrode when the cross section of the independent space is a regular hexagon;

FIG. 7 is a schematic view of the structure of a vertical tube section of the high voltage insulated electrode in a square arrangement;

FIG. 8 is a schematic view of the structure of a vertical tube section of a high voltage insulated electrode in a square arrangement with corners;

FIG. 9 is a schematic view of the structure of the vertical tube section of the high voltage insulated electrode in a regular triangle arrangement;

FIG. 10 is a schematic view of the structure of a vertical tube section of a high voltage insulated electrode in a corner triangle arrangement;

FIG. 11 is a schematic illustration of an even arrangement of vertical segments of high voltage insulated electrodes in separate spaces;

fig. 12 is a schematic illustration of an odd arrangement of vertical segments of high voltage insulated electrodes in separate spaces.

In the figure 1, an electric field demulsifier; 2. an insulating cavity; 3. an inlet section; 4. an electric field demulsification section; 5. an outlet section; 6. a cable; 7. a cable connection pipe; 8. an upper cover; 9. binding posts; 10. an insulating sleeve; 11. pressing a cylinder; 12. a rubber seal portion; 13. a sleeve; 14. a support leg; 15. a high voltage insulated electrode; 151. a vertical tube section; 152. bending a pipe section; 16. a bracket; 17. an upper electrode holder; 18. a stud is arranged; 19. an upper flange; 20. a grounding electrode plate; 21. a tube shell; 22. a fluid channel; 23. a lower flange; 24. a lower stud; 25. an outlet channel; 26. a lower electrode holder; 27. a transformer; 28. a power supply system.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.

In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

The electric field demulsifier provided by the embodiment of the invention is beneficial to the rapid coalescence and growth of water particles in a shorter time, and has less energy consumption and a simple structure.

The technical solution provided by the present invention is described in more detail below with reference to fig. 1 to 12.

As shown in fig. 1 to 3, the present embodiment provides an electric field demulsifier 1 including an electric field demulsification section 4, an inlet section 3 into which an emulsion flows, and an outlet section 5 from which the emulsion flows, wherein: the electric field demulsification section 4 comprises a tube shell 21, a grounding electrode plate 20 and high-voltage insulating electrodes 15 electrically connected with a power supply are arranged in the tube shell 21, independent spaces with closed peripheries are enclosed between the grounding electrode plate 20 and the tube shell 21 and between adjacent grounding electrode plates 20, a fluid channel 22 is formed, at least one high-voltage insulating electrode 15 is arranged in each independent space, the high-voltage insulating electrodes 15 are arranged at intervals with the tube shell 21 and the grounding electrode plates 20, and the fluid channel 22 is communicated with the inlet section 3 and the outlet section 5.

Wherein the envelope 21 is grounded. The independent spaces are spaces with open upper and lower ends and closed periphery, and can be seen from fig. 4-6, wherein the independent spaces with different cross sections are respectively shown in the upper diagrams. The crude oil emulsion flows into the electric field demulsification section 4 through the inlet section 3, and when the crude oil emulsion passes through the independent space, the dispersed phase water particles are coalesced and collide under the action of proper turbulence and high-voltage electric field, the particle size is increased, and then the crude oil emulsion flows out from the outlet section 5.

In the electric field demulsifier 1 of the embodiment, a high-voltage electric field is formed between the high-voltage insulating electrode 15 and the ground electrode plate 20 and between the high-voltage insulating electrode 15 and the tube shell 21, and at least one high-voltage insulating electrode 15 is arranged in an independent space, so that the electric field distribution is more uniform, when dispersed phase water particles of crude oil emulsion enter the electric field demulsification section 4 through the inlet section 3, under the action of proper turbulence and high-voltage electric field, the particle size of the dispersed phase water particles is increased after coalescence and collision, and the demulsification effect is improved; the structure is beneficial to the rapid aggregation and growth of water particles in a short time, and the energy consumption is low; meanwhile, the structure has certain compactness, is suitable for emulsion with different water contents, is convenient to process and install, and reduces the manufacturing cost.

As an alternative embodiment, referring to fig. 1 and 2, the high voltage insulating electrode 15 includes electrode tubes, the number of which includes one or more than two, at least part of the electrode tubes is vertically disposed, and the vertical part of the electrode tubes is located at the center of the independent space. The electrode tube is used as the high-voltage insulating electrode 15, and the part of the electrode tube in the independent space is vertically arranged as the grounding electrode plate 20, so that the uniformity of electric field distribution can be improved. There may be different electrode tubes in each separate space, or the vertical tube segments 151 in all separate spaces are located in the same electrode tube.

As an alternative embodiment, referring to fig. 1 and 2, the high voltage insulated electrode 15 includes an electrode tube, the number of which is one, including a plurality of vertical tube sections 151 and a curved tube section 152, the vertical tube sections 151 being located at the center of the independent space, the curved tube sections 152 being located at the ends of the vertical tube sections 151 and connecting adjacent vertical tube sections 151. At least one end of the high-voltage insulated electrode 15 is located in the insulated cavity 2, and when the number of vertical tube sections 151 of the high-voltage insulated electrode 15 is odd, the exposed end of the high-voltage insulated electrode 15 needs to be insulated and fixed.

Referring to fig. 2, the electric field demulsification section 4 in this embodiment includes only one electrode tube, and different vertical tube sections 151 of the electrode tube are located in different independent spaces and are connected to adjacent vertical tube sections 151 by a curved tube section 152. According to the structure, the energization of all vertical pipe sections 151 in the independent space can be realized only by arranging the pair of wiring posts 9, so that the arrangement of a high-voltage electric field is completed, the number of the wiring posts 9 can be reduced, and the electrode fixing and wiring modes are simplified.

The high-voltage insulated electrode 15 adopts a flexible conductive composite tube covered with an insulating material, and the insulating material can be poly perfluoroethylene propylene, polytetrafluoroethylene, epoxy resin, polyethylene, polypropylene and the like, so that the short circuit problem between the high-voltage insulated electrode 15 and the ground electrode plate 20 is effectively prevented, and the high-voltage insulated electrode can be used for a high-water-content working condition. The outer tube shell 21 is made of steel material and is grounded; the ground electrode plate 20 is manufactured using a stainless steel plate or a stainless steel mesh plate.

As an alternative embodiment, the ground electrode plate 20 is vertically arranged, which facilitates the flowing down of the crude oil emulsion and facilitates the more uniform distribution of the electric field; referring to fig. 4-6, and referring to fig. 11 and 12, in the independent space enclosed by the adjacent ground electrode plates 20, the cross section of the independent space is a regular triangle or a regular polygon, and the vertical tube section 151 corresponding to the high-voltage insulated electrode 15 is located at the center of the independent space.

In this embodiment, the isolated spaces with closed periphery are enclosed between the grounding electrode plates 20 and the tube shell 21 and between the adjacent grounding electrode plates 20, wherein, in the isolated spaces enclosed between the adjacent grounding electrode plates 20, the high-voltage insulated electrode 15 (the vertical tube segment 151 of the high-voltage insulated electrode 15) is located at the center position of the isolated space, so that the electric field distribution is more uniform, and the water particles can more quickly coalesce and grow when passing through the electric field demulsification section 4.

Referring to fig. 11 and 12, in the separate space enclosed between the ground electrode plate 20 and the envelope 21, the cross section may be irregularly shaped, and the high-voltage insulated electrode 15 may be disposed in the separate space as well in order to make full use of the space.

Referring to fig. 4-6, the ground electrode plate 20 constitutes an independent space having a triangular, square, or other polygonal arrangement in cross-section. Referring to fig. 7-10, when the grounding electrode plates 20 are arranged in a square shape, the vertical tube sections 151 of the high-voltage insulating electrode 15 include four arrangement modes including square arrangement, regular triangle arrangement, corner square arrangement, corner regular triangle arrangement; and is divided into odd-even arrangement or even arrangement according to the number of horizontal central lines of the vertical tube section 151 of the high-voltage insulated electrode 15, as shown in fig. 11 and 12. The arrangement of the high-voltage insulated electrode 15 and the ground electrode plate 20 not only makes the electric field distribution more uniform, but also makes the cross section of the fluid passage 22 fully usable without leaving a gap.

As an alternative embodiment, referring to fig. 1, the electric field demulsifier 1 further includes an insulation cavity 2, the insulation cavity 2 is located above the inlet section 3, a terminal 9 electrically connected to the power supply system 28 is disposed in the insulation cavity 2, and at least one end of the high-voltage insulated electrode 15 extends into the insulation cavity 2 to be electrically connected to the terminal 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, terminal 9 is connected with transformer 27, electrical power generating system 28 electricity through cable 6, and cable 6 is located cable take over 7, guarantees the electric safety that meets. The transformer 27 is an explosion-proof transformer 27, is powered by a power frequency/high voltage or high frequency/high voltage power supply system 28, and is arranged outside the electric field demulsifier 1.

Referring to fig. 1, the insulating cavity 2 of the terminal 9 is used for separating electricity from external crude oil, and after the high-voltage insulating electrode 15 in the insulating cavity 2 is connected with the terminal 9, insulating oil is poured into the insulating cavity 2 and the cable connection tube 7. The insulating oil isolates the binding post 9 from the peripheral wall of the insulating cavity 2, so that the short circuit phenomenon is prevented, and the overhaul is convenient.

As an alternative embodiment, referring to fig. 1, the insulating cavity 2 is surrounded by an upper cover 8 and a bracket 16, a sealing connection component is arranged in the insulating cavity 2, and the sealing connection component is connected with one end of the binding post 9 and one end of the high-voltage insulating electrode 15 and seals and isolates the high-voltage insulating electrode 15 and the insulating cavity 2 from each other. The sealing connector seals and isolates the high-voltage insulated electrode 15 and the peripheral wall of the insulated cavity 2, and prevents the occurrence of the circuit breaking phenomenon.

As an alternative embodiment, referring to fig. 1 and 3, the sealing connection assembly includes an insulation sleeve 10, a crimp 11, and a sleeve 13, wherein: the insulating sleeve 10 is fixedly connected to the lower part of the binding post 9, the pressing cylinder 11 is fixed to the lower part of the insulating sleeve 10, the sleeve 13 is fixed to the support 16, the pressing cylinder 11 is covered outside the end of the sleeve 13 and is in threaded connection with the sleeve 13, and one end of the high-voltage insulating electrode 15 penetrates through the sleeve 13, the pressing cylinder 11 and is in contact with the binding post 9.

Specifically, referring to fig. 1 and 3, the binding post 9 is fixedly connected with the insulating sleeve 13 through a binding nut, the sleeve 13 is welded and fixed with the support 16, communication cavities are formed in the sleeve 13, the pressing cylinder 11 and the insulating sleeve 10, when the pressing cylinder 11 is covered at the end part of the sleeve 13 and is in threaded connection with the end part of the pressing cylinder, the end part of the high-voltage insulating electrode 15 sequentially penetrates through the communication cavities of the sleeve 13, the pressing cylinder 11 and the insulating sleeve 10 and is connected with the binding post 9, so that the high-voltage insulating electrode 15 is electrified. The above structure facilitates connection of the high-voltage insulated electrode 15 and the binding post 9 while preventing liquid from entering the insulating cavity 2.

As an alternative embodiment, in order to further improve the sealing performance of the insulating cavity 2, as shown in fig. 3, the sealing connection assembly of the present embodiment further includes a rubber sealing portion 12, the rubber sealing portion 12 is clamped and fixed between the pressing cylinder 11 and the sleeve 13, and an abutting surface between the rubber sealing portion 12 and the sleeve 13 is a tapered surface, so that the pressing cylinder 11, the sleeve 13 and the high-voltage insulating electrode 15 are sealed, and one end of the high-voltage insulating electrode 15 passes through the sleeve 13, the rubber sealing portion 12, the pressing cylinder 11 and contacts with the binding post 9.

In the above-described configuration, the high-voltage insulating electrode 15 and the rubber seal 12, and the effective sealing surface between the rubber seal 12 and the rubber seal 12 are formed, the high-voltage insulating electrode 15 and the rubber seal 12 are tightly bonded to each other, the rubber seal 12 is sandwiched between the pressure cylinder 11, the sleeve 13 and the high-voltage insulating electrode 15, and the rubber seal 12 and the sleeve 13 are deformed by the rubber seal 12 by elasticity of rubber, so that a gap between the two can be sealed.

Referring to fig. 1 and 3, the binding post 9 is divided into an upper part and a lower part, both of which adopt a threaded structure, the diameter of the upper part is smaller, the lower part is larger, the binding post is connected with the high-voltage cable 6 through a binding nut, and the binding post is connected with the metal tube inside the high-voltage insulated electrode 15 through threads, so that the problem that the rubber sealing part 12 is deformed under stress and then is deformed by applying pressure to the high-voltage insulated electrode 15 is prevented. After the crude oil emulsion flows in from the inlet section 3, as the rubber sealing part 12 is respectively attached to the surfaces of the pressure cylinder 11, the high-voltage insulated electrode 15 and the sleeve 13, contact pressure is generated between the structures, and the contact pressure between the contact surfaces is higher than the liquid permeation pressure, the insulating cavity 2 and the inlet section 3 are effectively isolated, and the liquid is prevented from flowing into the insulating cavity 2 from the gap between the sleeve 13 and the high-voltage insulated electrode 15.

As an alternative embodiment, referring to fig. 1, the electric field demulsifier 1 comprises an upper electrode holder 17, an upper flange 19 and an upper stud 18, wherein: the upper end of the high-voltage insulating electrode 15 is fixed with the upper electrode bracket 17, and the upper end of the grounding electrode plate 20 is fixed with the upper flange 19 and grounded; the upper electrode brackets 17 and the upper flanges 19 are arranged at intervals in the vertical direction, an inlet section 3 is formed between the upper electrode brackets 17 and the upper flanges 19, the upper studs 18 are connected with the upper electrode brackets 17 and the upper flanges 19, the upper studs 18 are arranged at intervals, and an inlet channel for inflow of emulsion is defined among the upper electrode brackets 17, the upper flanges 19 and the upper studs 18.

Referring to fig. 1, the sleeve 13 is fixed to the upper electrode holder 17 by the legs 14, thereby fixing the insulating chamber 2. The above structure realizes the fixation of the upper ends of the high-voltage insulated electrode 15 and the ground electrode plate 20. In the inlet section 3, crude oil emulsion can enter the fluid channel 22 through an inlet channel formed among the upper stud 18, the upper electrode bracket 17 and the upper flange 19, and can also enter the fluid channel 22 from the upper part of the upper electrode bracket 17, so that crude oil can flow into the fluid channel 22 of the inlet section 3 and the electric field demulsification section 4 more quickly and uniformly.

As an alternative embodiment, referring to fig. 1, the electric field demulsifier 1 comprises a lower electrode holder 26, a lower flange 23 and a lower stud 24, wherein: the lower end of the high-voltage insulating electrode 15 is fixed with a lower electrode bracket 26, and the lower end of the grounding electrode plate 20 is fixed with a lower flange 23; the lower end of the high-voltage insulated electrode 15 is fixed with a lower electrode support 26 and grounded, the lower electrode support 26 and a lower flange 23 are arranged at intervals in the vertical direction, an outlet section 5 is formed between the lower electrode support 26 and the lower flange 23, a lower stud 24 is connected with the lower electrode support 26 and the lower flange 23, adjacent lower studs 24 are arranged at intervals, and an outlet channel 25 for emulsion to flow out is arranged between the lower electrode support 26, the lower flange 23 and the lower stud 24. The above structure realizes the fixation of the lower ends of the high-voltage insulating electrode 15 and the grounding electrode plate 20.

In the outlet section 5, the crude oil emulsion can enter and exit the fluid passage 22 through an outlet passage 25 formed between the lower stud 24, the lower electrode bracket 26 and the lower flange 23, and can enter and exit the fluid passage 22 from the lower part of the lower electrode bracket 26, so that the crude oil can flow out more quickly and uniformly.

Wherein, the fluid channel 22 is formed between the vertical tube section 151 of the high-voltage insulated electrode 15 and the ground electrode plate 20, when the crude oil emulsion flows through the fluid channel 22, the Reynolds number is maintained between 2000 and 8000, and the dispersed phase water particles can be coalesced and grown as soon as possible under the action of the high-voltage electric field and proper turbulence.

In the electric field demulsifier 1 of this embodiment, during operation, when crude oil emulsion flows through the outside of 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 high voltage to the high-voltage insulated electrode 15, the liquid coalesces and grows up the dispersed phase water particles under the action of the high-voltage electric field between the two electrodes and proper turbulence, and finally the emulsion is discharged from the outlet section 5.

As shown in fig. 11 and 12, on the premise of adopting a square arrangement mode of the grounding electrode plate 20 and the vertical tube section 151 of the high-voltage insulating electrode 15, the horizontal central tube number of the vertical tube section 151 of the high-voltage insulating electrode 15 is divided into odd arrangement or even arrangement according to parity, and the specific arrangement mode is determined according to the size of the tube shell 21.

In the electric field demulsifier 1 of this embodiment, the size of the tube shell 21 is kept constant, 5000V voltage is applied to the high-voltage insulated electrode 15, under the condition that the number of vertical tube segments 151 of the high-voltage insulated electrode 15 is guaranteed to be the same, COMSOL Multiphysics multiple physical field simulation software is adopted to simulate the electric field intensity of the section between the upper electrode support 17 and the lower electrode support 26, one of the two electric field demulsifiers 1 adopts a mode that the high-voltage insulated electrode 15 and a grounded metal tube are arranged at intervals, the other electric field demulsifier 1 adopts a mode that the high-voltage insulated electrode 15 and the grounded metal plate are arranged (wherein adjacent grounded metal is enclosed to form an independent space with enclosed periphery, and the vertical tube segments 151 of the high-voltage insulated electrode 15 are located in the center position of the independent space), and the tube shell 21 is grounded in both arrangements. Referring to table 1 below, the results indicate that: when the arrangement mode of the high-voltage insulating electrode 15 and the metal electrode tube is adopted, the electric field area more than 1.5kV/cm accounts for 23.09%, and the electric field area more than 1kV/cm accounts for 49.71%; when the arrangement mode of the high-voltage insulated electrode 15 and the grounding electrode plate 20 is adopted, the electric field area with the concentration of more than 1.5kV/cm accounts for 51.98 percent, and the electric field area with the concentration of more than 1kV/cm accounts for 66.37 percent. By contrast, when the high-voltage insulated electrode 15 and the ground electrode plate 20 are combined, the electric field distribution is more uniform.

TABLE 1 comparison of the simulation results of the arrangement of the high-voltage insulated electrode and the insulated electrode plate of the invention with other arrangements

In the electric field demulsifier 1, the Reynolds number Re of the crude oil emulsion can be kept between 2000 and 8000 in the working process, so that dispersed phase droplets are coalesced and grown under the action of proper turbulence; by adopting the electric field demulsifier 1, 5000V voltage is applied to the high-voltage insulated electrode 15, the area of an electric field strength area above 1.5kV/cm is relatively high, the electric field distribution is relatively uniform, water particles can be quickly coalesced and grown in a relatively short time, and the energy consumption is relatively low; the number of binding posts 9 can be reduced by adopting the vertical pipe section 151 and the bent pipe section 152 to be combined with one or more high-voltage insulated electrodes 15, and the electrode fixing and wiring modes can be simplified. The electric field demulsification unit form of the high-voltage insulated electrode 15 and the grounding electrode plate 20 is easy to process and install.

The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples in this specification.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An electric field demulsifier comprising an electric field demulsification section, an inlet section into which an emulsion flows and an outlet section from which the emulsion flows, wherein:

the electric field demulsification section comprises a tube shell, a grounding electrode plate and a high-voltage insulating electrode electrically connected with a power supply are arranged in the tube shell, a peripheral enclosed independent space is enclosed between the grounding electrode plate and the tube shell and between the adjacent grounding electrode plates, a fluid channel is formed, at least one high-voltage insulating electrode is arranged in each independent space, the high-voltage insulating electrodes are arranged with the tube shell and the grounding electrode plate at equal intervals, and the fluid channel is communicated with the inlet section and the outlet section.

2. The electric field demulsifier as defined in claim 1, wherein the ground electrode plates are vertically arranged, and the cross section of the independent space enclosed by the adjacent ground electrode plates is a regular triangle or a regular polygon, and the high-voltage insulated electrode is located at the center position of the independent space.

3. The electric field demulsifier as defined in claim 1, wherein the high-voltage insulated electrode comprises electrode tubes, the number of electrode tubes comprises one or more than two, at least part of the electrode tubes are vertically arranged, and the vertical parts of the electrode tubes are positioned at the central position of the independent space.

4. The electric field demulsifier as defined in claim 1, wherein the high-voltage insulated electrode comprises one electrode tube, the electrode tube comprises a plurality of vertical tube sections and a curved tube section, the vertical tube sections are positioned at the center of the independent space, and the curved tube sections are positioned at the ends of the vertical tube sections and are connected with adjacent vertical tube sections.

5. The electric field demulsifier as defined in claim 1, further comprising an insulating cavity above the inlet section, wherein a terminal electrically connected to a power supply system is provided in the insulating cavity, and at least one end of the high-voltage insulated electrode extends into the insulating cavity to be 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.

6. The electric field demulsifier as defined in claim 5, wherein the insulating cavity is surrounded by an upper cover and a bracket, and a sealing connection assembly is arranged in the insulating cavity, and the sealing connection assembly connects the binding post and one end of the high-voltage insulating electrode, and seals and isolates the high-voltage insulating electrode from the insulating cavity.

7. The electric field demulsifier as defined in claim 6, wherein the sealed connection assembly comprises an insulating sleeve, a pressure cylinder and a sleeve, wherein:

the insulation sleeve is fixedly connected to the lower portion of the binding post, the pressing cylinder is fixed to the lower portion of the insulation sleeve, the sleeve is fixed to the support, the pressing cylinder is covered outside the end portion of the sleeve and is in threaded connection with the sleeve, and one end of the high-voltage insulation electrode penetrates through the sleeve, the pressing cylinder and is in contact with the binding post.

8. The electric field demulsifier as set forth in claim 7, wherein the seal connection assembly further comprises a rubber seal portion which is held and fixed between the pressure cylinder and the sleeve, and an abutting surface between the rubber seal portion and the sleeve is a conical surface so as to seal between the pressure cylinder, the sleeve and the high-voltage insulated electrode, and one end of the high-voltage insulated electrode sequentially passes through the sleeve, the rubber seal portion and the pressure cylinder and contacts the binding post.

9. The electric field demulsifier as defined in claim 1, wherein the electric field demulsifier comprises an upper electrode support, an upper flange, and an upper stud, wherein:

the upper end of the high-voltage insulating electrode is fixed with the upper electrode bracket, and the upper end of the grounding electrode plate is fixed with the upper flange;

the upper electrode support and the upper flange are arranged at intervals in the vertical direction, an inlet section is formed between the upper electrode support and the upper flange, the upper studs are connected with the upper electrode support and the upper flange, the upper studs are arranged adjacently at intervals, and an inlet channel for inflow of emulsion is enclosed between the upper electrode support, the upper flange and the upper studs.

10. The electric field demulsifier as set forth in claim 9 comprising a lower electrode holder, a lower flange, and a lower stud, wherein:

the lower end of the high-voltage insulating electrode is fixed with the lower electrode bracket, and the lower end of the grounding electrode plate is fixed with the lower flange;

the lower end of the high-voltage insulated electrode is fixed with the lower electrode support, the lower electrode support and the lower flange are arranged at intervals in the vertical direction, an outlet section is formed between the lower electrode support and the lower flange, the lower studs are connected with the lower electrode support and the lower flange, adjacent lower studs are arranged at intervals, and an outlet channel for emulsion to flow out is arranged between the lower electrode support, the lower flange and the lower studs in a surrounding mode.

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