Three-phase separator cooperatively reinforced by multiple electric fields and magnetic fields

Abstract

The utility model discloses a three-phase separator for synergistically strengthening multiple electric fields and magnetic fields. The three-phase separator comprises a tank body, a tubular distributor, a crude oil pipeline, a dosing pipeline, an oil outlet pipeline, a gas outlet pipeline, a power supply device and heating equipment (optional), a middle-low voltage bare electrode electric field demulsification system is arranged in a liquid phase layer in the separator; a quick-change electromagnetic field demulsification system and a quick-change solenoid demulsification system are arranged outside the separator; the existing thermochemical treatment process of crude oil is simplified, the generated multiple electric fields and magnetic fields can perform effective electric field demulsification and electrostatic coalescence dehydration on water-in-oil type and oil-in-water type crude oil emulsions in the tank, the chemical demulsification process in the electric fields can be enhanced, the standing time of conventional high-frequency pulsed electric field treatment of the crude oil is shortened, and the crude oil quality is improved. And closed, efficient and low-cost treatment of crude oil can be realized.

Description

Technical Field

[0001] This utility model relates to a three-phase separation technology, and more particularly to a three-phase separator that is enhanced by the synergistic effect of multiple electric and magnetic fields. Background Technology

[0002] Currently, with the economy entering a phase of rapid development, the demand for energy is constantly increasing, while the exploitable lifespan of oil and gas resources is getting shorter and shorter. Finding new alternative energy sources is urgent, and oil shale, as an alternative to petroleum, has become a focus of global attention since its discovery.

[0003] Shale oil refers to petroleum resources contained in shale formations (mainly shale), primarily existing in rock pores, fractures, and adjacent and interlayered layers. Shale oil is characterized by high pour point, high wax content, high wax precipitation point, small droplet size in emulsions, and high degree of emulsification. Therefore, shale oil produced fluids face challenges in demulsification and dehydration during processing. To meet the needs of shale oil field product metering, processing, commercial crude oil quality requirements, crude oil storage, and pipeline (or other transportation) transportation, it is essential to separate the gas and liquid phases, and to separate the crude oil and associated water in the liquid phase. Three-phase separation is thus the primary processing step in shale oil field processing.

[0004] Oil, gas, and water are three phases with different physical and chemical properties, such as density and viscosity. Oil-gas-water three-phase separators utilize these differences in properties (such as gravity settling, centrifugation, or packing separation) to achieve a certain degree of separation. However, because the properties of produced fluids vary from oilfield to oilfield, the required degree of separation also differs. Therefore, scholars and engineers both domestically and internationally have continuously researched, designed, and improved oil-gas-water three-phase separators based on the requirements of production and extraction environments, making them more rational, effective, economical, and environmentally friendly.

[0005] Since 2017, Professor Chen Jiaqing's research group at Beijing Institute of Petrochemical Technology has been dedicated to the localization and application of third-generation VIEC technology and products. After more than two years of research, and based on the thorough digestion and absorption of foreign third-generation VIEC electric field demulsification technology, they independently developed a transformer-non-embedded VIEC electrostatic coalescence module. This module consists of metal electrodes, insulating electrodes, stainless steel tubes, and a hub ball, with the insulating electrode plate integrally molded from epoxy resin. This technology underwent pilot testing in January 2019 at the Shengli Oilfield's Zhuangxi 106 transfer station. The inlet water cut of the three-phase separator was 97.3%, the crude oil density was 0.932 g / cm³, and the viscosity was 328 mPa·s. Experimental results showed that under the action of a high-frequency / high-voltage pulsed AC electric field, the VIEC electric field demulsification technology can reduce the water cut of oil well produced fluid with a water cut of 97% to about 4% or even lower after electrostatic coalescence dehydration. The electric field demulsification effect is significant, providing valuable experience for subsequent industrial field application experiments.

[0006] In 2020, Liu Cunxin et al. of Jinbiao Intelligent Technology Co., Ltd. proposed a novel high-frequency electrostatic coalescer. During operation, high-water-content crude oil emulsion enters tangentially through the inlet of a gas-liquid cyclone separator. After internal centrifugation, the gas exits through the upper exhaust pipe, while the liquid flows into the electric field region from the bottom of the device. A primary high-frequency coalescer device demulsifies the crude oil emulsion under an electric field, achieving oil-water separation. The secondary coalescer device effectively cuts bubbles, improving oxygen transfer rate and utilization efficiency, thus effectively treating organic matter in the water. In the same year, Sun Longlong et al. of Shengli Oilfield Longxi Petroleum Engineering Service Co., Ltd. designed a high-frequency coalescer device to address the problems of strong emulsification and difficulty in processing high-water-content crude oil produced fluid. During processing, the crude oil emulsion enters through the inlet and is evenly dispersed in the tank through an oil orifice distributor. It flows through the electric field region, and under the action of the electrode grid's electric field, the oil and water phases separate, with the oil phase discharged from the tank through the outlet. Field experimental results show that after treatment, the water content of crude oil emulsion with a water content of over 90% can be reduced to 5%, demonstrating the significant effect of electric field demulsification and pre-water separation.

[0007] In summary, among existing three-phase crude oil separation processes, thermochemical processes are costly, have long processing times, are difficult to seal, resulting in significant oil and gas losses and prominent environmental problems. Furthermore, the treated oil and water often fail to meet standards for external transport. Objectively speaking, compared to chemical demulsification and thermochemical demulsification methods for treating oil-water emulsions, electric field demulsification has received considerable attention from researchers both domestically and internationally in recent years due to its high efficiency and lack of side effects. Currently, most operational three-phase separators still use power frequency / high-voltage AC electric fields. Extensive engineering operation results to date indicate that power frequency electric dehydration equipment is prone to electrical breakdown, leading to damage to the electric field and electrodes, and difficulties in applying current. Meanwhile, conventional high-frequency pulse electric field equipment for shale oil processing has a residence time more than twice that of conventional crude oil processing. Therefore, there is an urgent need to improve the effectiveness of the electric field used in shale oil electric field separators.

[0008] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0009] The purpose of this invention is to provide a three-phase separator that is enhanced by the synergistic effect of multiple electric and magnetic fields, so as to solve the above-mentioned technical problems existing in the prior art.

[0010] The objective of this utility model is achieved through the following technical solution:

[0011] The present invention relates to a three-phase separator enhanced by multiple electric and magnetic fields, comprising a separator tank. One end of the separator tank is connected to an oil pipeline 3, a water injection pipeline 2, and a chemical dosing pipeline 1, and the other end is connected to an oil outlet pipeline 15. An air outlet pipeline 14 is connected to the upper part, and a drainage pipeline 17 is connected to the lower part. A side branch of the drainage pipeline 17 is connected to a mud and sand flushing water pipeline 16 via a water pump to the separator tank.

[0012] The separator tank is equipped with a tubular distributor 7 connected to the crude oil pipeline 3. The area from the tubular distributor 7 to the oil outlet pipeline 15 is the crude oil processing area.

[0013] The separator tank is equipped with a medium-low pressure bare electrode electric field demulsification system 8, and the separator tank is equipped with a fast-changing electromagnetic field demulsification system 12 and a fast-changing solenoid demulsification system 13.

[0014] The separator tank is equipped with a matching power supply device 10 and a power supply wiring hub 11.

[0015] Compared with existing technologies, the three-phase separator with multiple electric and magnetic fields enhanced by this invention simplifies the existing thermochemical treatment process of crude oil. The multiple electric and magnetic fields generated can effectively demulsify and electrostatically coalesce and dehydrate oil-in-water and water-in-oil crude oil emulsions in the tank, and can enhance the chemical demulsification process in the electric field, shorten the residence time of crude oil in conventional high-frequency pulse electric field treatment, and realize closed, efficient and low-cost crude oil treatment.

[0016] It is used to demulsify and dehydrate crude oil so that the treated crude oil meets the relevant requirements for export at the mine or for subsequent processing in the refinery. Attached Figure Description

[0017] Figure 1 A schematic diagram of a three-phase separator structure with synergistic enhancement of multiple electric and magnetic fields provided in Embodiment 1 of this utility model (excluding crude oil gathering section).

[0018] Figure 2 A schematic diagram of a three-phase separator structure (including weir plate, oil collection zone and water collection zone) with synergistic enhancement of multiple electric fields and magnetic fields provided in Embodiment 2 of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of a simplified electrode plate provided in an embodiment of the present utility model;

[0020] Figure 4a , Figure 4b These are front and top views of the single iron core provided in the embodiments of this utility model;

[0021] The meanings represented by each mark in the diagram are as follows:

[0022] 1-Dosing line, 2-Water injection line, 3-Crude oil line, 4-Heat exchanger, 5-Static mixer, 6-Mixing valve, 7-Tube distributor, 8-Bare electrode of low-pressure bare electrode electric field demulsification system, 9-Grounding electrode, 10-Power supply device, 11-Power supply wiring hub, 12-Fast conversion electromagnetic field demulsification system, 13-Fast conversion solenoid demulsification system, 14-Gas outlet line, 15-Oil outlet line, 16-Mud flushing water line, 17-Drainage line, 18-Mud flushing line manifold;

[0023] 21-Main separation chamber area, 22-Oil collecting area, 23-Water collecting area

[0024] 41-Angle steel, 42-Police plate, 43-Angle bracket. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments, which do not constitute a limitation on the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] First, the following explanations are provided for the terms that may be used in this article:

[0027] The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0028] The terms "comprising," "including," "containing," "having," or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.) should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0029] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0030] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0031] The contents not described in detail in the embodiments of this utility model are existing technologies known to those skilled in the art. Where specific conditions are not specified in the embodiments of this utility model, they shall be performed according to conventional conditions in the art or conditions recommended by the manufacturer. Reagents or instruments used in the embodiments of this utility model whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0032] The present invention relates to a three-phase separator enhanced by multiple electric and magnetic fields, comprising a separator tank. One end of the separator tank is connected to an oil pipeline 3, a water injection pipeline 2, and a chemical dosing pipeline 1, and the other end is connected to an oil outlet pipeline 15. An air outlet pipeline 14 is connected to the upper part, and a drainage pipeline 17 is connected to the lower part. A side branch of the drainage pipeline 17 is connected to a mud and sand flushing water pipeline 16 via a water pump to the separator tank.

[0033] The separator tank is equipped with a tubular distributor 7 connected to the crude oil pipeline 3. The area from the tubular distributor 7 to the oil outlet pipeline 15 is the crude oil processing area.

[0034] The separator tank is equipped with a medium-low pressure bare electrode electric field demulsification system 8, and the separator tank is equipped with a fast-changing electromagnetic field demulsification system 12 and a fast-changing solenoid demulsification system 13.

[0035] The separator tank is equipped with a matching power supply device 10 and a power supply wiring hub 11.

[0036] The bare electrode of the medium-low voltage bare electrode electric field demulsification system 8 adopts a rectangular wave power supply method, with a power supply voltage between 10V and 2kV, a pulse frequency between 500Hz and 250kHz, and a power supply commutation frequency between 50Hz and 5kHz.

[0037] The fast-changing electromagnetic field demulsification system 12 includes several annular iron cores, which are fitted onto the separator tank. Each annular iron core is equipped with a fast-changing excitation winding.

[0038] An insulating fixing bracket is provided between the iron core and the separator tank, and the fast-changing excitation winding is embedded in the insulating fixing bracket.

[0039] All of the fast-changing excitation windings are connected in parallel and powered by a single excitation power supply device;

[0040] Alternatively, they can be grouped and connected in parallel, with each group powered by a single excitation power supply. The waveforms generated by multiple excitation power supplies must be in phase.

[0041] The current change rate in the fast-changing excitation winding is ≥10A / µs; the voltage is between 50V and 5kV.

[0042] The excitation frequency of the fast-changing excitation winding has three frequency adjustment ranges:

[0043] Frequency adjustment range 1 is the normal frequency range between 500Hz and 20kHz;

[0044] Frequency adjustment range 2 is the ultra-high frequency range, between 20kHz and 250kHz;

[0045] Frequency adjustment range 3 is the near-microwave frequency range between 500kHz and 500MHz;

[0046] When the excitation winding is energized by fast switching, various optimized composites of different frequencies are used, and the excitation voltage waveform is a rectangular wave, an AC square wave, or a frequency-agile wave.

[0047] The above adjustment methods are adapted to targeted demulsification of crude oils with different properties.

[0048] The fast-changing solenoid demulsification system 13 consists of ordinary high-temperature wires threaded inside an explosion-proof tube and then wrapped around the separator tank.

[0049] The solenoid power supply current change rate of the fast-changing solenoid demulsification system 13 is ≥10A / us; the voltage is adjustable between 10V and 2kV.

[0050] The solenoid power supply frequency adjustment range is between 500Hz and 250kHz. The solenoid power supply frequency adopts various optimized composites of different frequencies. The solenoid power supply voltage waveform is a rectangular wave, an AC square wave, or a frequency agile.

[0051] The above adjustment methods are adapted to targeted demulsification of crude oils with different properties.

[0052] The medium-low voltage bare electrode electric field demulsification system 8, the fast-changing electromagnetic field demulsification system 12, and the fast-changing solenoid demulsification system 13 are powered separately.

[0053] Alternatively, the medium-low voltage bare electrode electric field demulsification system 8 and the fast-changing solenoid demulsification system 13 can be centrally powered through a solenoid, with the power supply characteristics determined by the bare electrode.

[0054] The three-phase separator is provided with an oil collection area and a water collection area at the rear, and a heating device (optional) is provided outside the separator tank.

[0055] In summary, the three-phase separator with synergistic enhancement of multiple electric and magnetic fields in this embodiment simplifies existing thermochemical processing of crude oil. The multiple electric and magnetic fields generated by the low- and medium-pressure bare electrode electric field demulsification system, the separator external fast-changing solenoid demulsification system, and the separator external fast-changing electromagnetic field demulsification system simultaneously perform effective electric field demulsification and electrostatic coalescence dehydration of the crude oil emulsion. Furthermore, it enhances the chemical demulsification process within the electric field, shortening the residence time of crude oil in conventional electric field treatments. This enables closed-loop, efficient, and low-cost crude oil processing. The three-phase separator with synergistic enhancement of multiple electric and magnetic fields has a simple structure, low construction cost, and is easy to maintain.

[0056] This utility model discloses a three-phase separator with multiple electric and magnetic fields synergistic enhancement. The medium and low voltage bare electrodes 8 inside the separator tank are integrated and the electrode plates are longitudinally inclined plates with an inclined plate settling effect. Several pairs of electrodes are integrated as a whole, and mounting brackets for the electrodes are set at corresponding positions inside the tank. Electrodes of the same polarity are connected by cables. The medium and low voltage bare electrodes 8 are connected to the medium and low voltage bare electrode power supply port of the power supply hub 11, and the grounding electrode 9 is connected to the ground wire. Insulating material is provided between the electrode plates of different polarities.

[0057] The low- and medium-voltage bare electrodes 8 inside the separator tank are also simply installed. In one group, the four corners of each electrode plate are connected by four angle steels, and the electrode plates and angle steels are fixed by angle brackets. The mounting brackets for the electrodes are set at the corresponding positions inside the tank. Two angle steels on one side of one group of electrode plates are connected to the power supply terminals of the power supply wiring hub, and two angle steels on the other side are grounded. In this method, the electrode plates are spliced ​​together from metal electrode plates and appropriately sized insulating materials so that the insulating side of the grounding electrode plate is directly fixed to the angle steel on the power-connected side, and the insulating side of the power-connected electrode plate is directly fixed to the angle steel on the grounding side.

[0058] The fast-changing electromagnetic field device includes several annular iron cores, which are evenly distributed and fitted onto the separator tank. Each annular iron core is equipped with a fast-changing excitation winding. An insulating fixing bracket is provided between the iron core and the straight tube. To meet explosion-proof requirements, the fast-changing excitation windings are all pre-embedded in the insulating fixing bracket.

[0059] The external fast-change solenoid demulsification system includes an external solenoid with the main tank body as the axis, a heat insulation protection layer between the main body and the solenoid, and an explosion-proof shell for the external solenoid (optional).

[0060] This utility model presents a three-phase separator with synergistic enhancement of multiple electric and magnetic fields. Addressing the challenge of crude oil demulsification and separation, it fully utilizes the separator's volume space to incorporate a low-to-medium voltage bare electrode electric field demulsification system, along with an external fast-changing electromagnetic field demulsification system and an external fast-changing solenoid system. The multiple electric and magnetic fields generated by these three systems demulsify and electrostatically coalesce the emulsion from different dimensions. Combined with a demulsifier, it enhances the chemical demulsification of crude oil, improving oil-water separation efficiency and significantly shortening processing time. This simplifies existing thermochemical crude oil processing techniques. The multiple electric and magnetic fields effectively demulsify and dehydrate the emulsion from different dimensions, while also enhancing the chemical demulsification process within the electric field, shortening residence time, and enabling closed-loop, efficient, and low-cost crude oil processing.

[0061] The three-phase separator with synergistic enhancement of multiple electric and magnetic fields provided in this embodiment of the invention, on the one hand, uses a medium-low voltage bare electrode electric field demulsification system to directly perform electric field demulsification and enhance chemical demulsification, thereby improving the single-unit processing efficiency of the separator; on the other hand, the magnetic field and its induced electric field generated by the external fast-changing electromagnetic field demulsification system demulsify the crude oil emulsion and enhance chemical demulsification; and on the third hand, the magnetic field and its induced electric field generated by the external fast-changing solenoid demulsification system demulsify the crude oil emulsion and enhance chemical demulsification. The multiple magnetic and electric fields generated by these three entities treat the crude oil emulsions of different forms in the separator tank, replacing the conventional single electric field treatment method, fully treating the crude oil emulsion, further reducing the water content of the treated crude oil produced fluid, reducing the oil concentration of the cut water, and significantly reducing reagent and heating costs.

[0062] To more clearly demonstrate the technical solution and effects provided by this utility model, the following detailed description of the embodiments of this utility model is provided with reference to specific examples.

[0063] The main equipment involved in this utility model includes a separator tank, a tubular distributor, crude oil pipelines, chemical dosing pipelines, oil outlet pipelines, gas outlet pipelines, a power supply device, and a heating device (optional). The crude oil produced, dilution water (optional), and demulsifier are heated by a heat exchanger and then fully mixed under the action of a static mixer and a mixing valve. The mixture then enters the inlet of the tubular distributor in the separator. During the mixing process, the dilution water (optional) extracts salts from the crude oil. The oil-water mixture enters through the inlet of the tubular distributor located outside the tank and is sprayed out from the vertical pipe inside the tank towards the outlet on the side of the adjacent end cap. It then collides with the end cap, causing preliminary separation of oil and gas and changing the direction and velocity of the fluid. Subsequently, the liquid phase is drawn below the liquid surface, and the oil and water separate into layers based on the density difference. The bottom layer is a water-rich layer, and the upper part is an oil-rich layer and an emulsion layer containing dispersed water droplets. Within the limited hydraulic residence time of the separator, some emulsions cannot be fully demulsified, resulting in an oil-water emulsion layer between the upper oil zone and the lower water zone. Furthermore, a single electric field cannot effectively handle severely emulsified emulsions. The oil-rich layer contains water-in-oil dispersed phases, while the water-rich layer contains both oil-in-water and water-in-oil dispersed phases. Therefore, a full-scale low- and medium-pressure bare electrode demulsification system is deployed in the separator's liquid phase without affecting installation and maintenance. To better handle the dispersed phases in the oil-rich, water-rich, and emulsion layers, a fast-changing electromagnetic field demulsification system and a fast-changing solenoid demulsification system are installed outside the separator. These systems utilize multiple magnetic and electric fields to demulsify dispersed phases in different states. By treating the emulsion from different dimensions through the multiple electric and magnetic fields generated by the three demulsification systems, the emulsion within the separator can be effectively treated.

[0064] To improve the processing efficiency of the separator, this invention also employs an electric field to enhance the chemical demulsification effect of the demulsifier. Specifically, a demulsifier is added to the crude oil and dilution water (optional) at the inlet, and the crude oil is heated by a heat exchanger before entering the external inlet of the tubular distributor. This allows the electric field and the demulsifier to achieve a higher demulsification efficiency under the coupled synergistic effect at a certain temperature.

[0065] This utility model provides a three-phase separator with synergistic enhancement of multiple electric and magnetic fields. Firstly, the in-tank low-voltage bare electrode electric field demulsification system directly performs electric field demulsification and enhances chemical demulsification, improving the separator's single-unit processing efficiency. Secondly, the external fast-changing electromagnetic field demulsification system generates a magnetic field and its induced electric field to demulsify the crude oil emulsion and enhance chemical demulsification. Thirdly, the external fast-changing solenoid demulsification system generates a magnetic field and its induced electric field to demulsify the crude oil emulsion and enhance chemical demulsification. The multiple magnetic and electric fields generated by these three systems treat crude oil emulsions of different forms within the separator tank, replacing the conventional single-field treatment method. This fully treats the crude oil emulsion, further reducing the water content of the treated produced crude oil and lowering the oil concentration in the water stripping process. It also significantly reduces reagent and heating costs. The use of low-voltage bare electrodes for in-tank electric field demulsification reduces manufacturing costs and installation difficulty. The electric fields induced by the external fast-changing electromagnetic field demulsification system and the external fast-changing solenoid demulsification system do not exhibit ineffective power loss or electric field collapse phenomena because there is no current loop. Example

[0066] like Figure 1 , Figure 2 and Figure 3 As shown, the crude oil to be processed in crude oil pipeline 3 and the dilution water (optional) in water injection pipeline 2 are mixed through static mixer 5 and mixing valve 6. At the same time, in order to ensure that the separator has a relatively good demulsification effect, an appropriate amount of demulsifier is added to the mixture through reagent pipeline 1, and then the mixture is moderately heated through heat exchange equipment 4. The mixture enters through the inlet outside the tank of tubular distributor 7, and is sprayed out from the vertical pipe inside the tank towards the outlet on the side of the adjacent head, and then collides with the head. In this process, the oil and gas are initially separated and the direction and velocity of the fluid are changed. The gas rises to the top of the tank to form a gas phase layer, and then the liquid phase is drawn to the bottom of the liquid surface. The oil and water are separated by the density difference. The bottom is a water-rich layer, and the upper part is an oil-rich layer and an emulsion layer containing dispersed water droplets. A medium and low pressure bare electrode demulsification system is installed in the liquid phase layer. The fast-changing electromagnetic field demulsification system and the solenoid demulsification system installed outside the separator tank simultaneously perform demulsification on the liquid phase inside the pipe.

[0067] The fast-changing electromagnetic field device includes several annular iron cores, which are evenly distributed and fitted onto the separator tank. Each annular iron core is equipped with a fast-changing excitation winding. An insulating fixing bracket connects the iron core to the straight tube, and the fast-changing excitation windings are pre-embedded within this bracket to meet explosion-proof requirements. In this embodiment, the iron core material can be a soft magnetic material, such as silicon steel sheet, ferrite, iron-based amorphous material, or iron-based microcrystalline material. The appropriate material can be selected based on the crude oil processing scenario, considering factors such as cost and crude oil dehydration effect. The annular iron cores fitted onto the separator tank can be... Figure 4a , Figure 4bThe iron core unit shown is composed of [material name].

[0068] The external fast-change solenoid demulsification system includes an external solenoid with the main tank body as the axis, a heat insulation protection layer between the main body and the solenoid, and an explosion-proof shell for the external solenoid (optional).

[0069] The medium-low voltage bare electrode electric field demulsification system adopts a rectangular wave power supply method. The power supply voltage is adjustable between 10V and 2kV, and the pulse frequency is adjustable between 500Hz and 250kHz. To ensure that the bare electrode is not corroded, the power supply commutation frequency is adjustable between 50Hz and 5kHz.

[0070] When the fast-changing electromagnetic field system is powered, the current change rate in the fast-changing excitation winding is ≥10A / us, and the higher the change rate, the better the effect; the voltage is adjustable between 50V and 5kV; the excitation frequency of the fast-changing excitation winding can have three frequency adjustment ranges: frequency adjustment range 1 is the conventional frequency range between 500Hz and 20kHz, frequency adjustment range 2 is the ultra-high frequency range between 20kHz and 250kHz, and frequency adjustment range 3 is the near-microwave frequency range between 500kHz and 500MHz; various optimized combinations of different frequencies can be used when the fast-changing excitation winding is energized; the excitation voltage waveform can be a rectangular wave, an AC square wave, or a frequency-agile wave.

[0071] The fast-changing solenoid demulsification system described above has a current change rate of ≥10A / us powered by the solenoid, with a higher change rate resulting in better performance; the voltage is adjustable between 10V and 2kV; the solenoid power supply frequency adjustment range is between 500Hz and 250kHz, and various optimized combinations of different frequencies can be used for the solenoid power supply frequency; the solenoid power supply voltage waveform can be a rectangular wave, an AC square wave, or a frequency-agile converter.

[0072] When the medium-low voltage bare electrode electric field demulsification system, the fast-changing electromagnetic field demulsification system, and the fast-changing solenoid demulsification system are supplied together, from the perspective of cost saving, the medium-low voltage bare electrode electric field demulsification system and the fast-changing solenoid demulsification system can also be supplied through a solenoid. The power supply characteristics are mainly determined by the bare electrode.

[0073] After the above treatment, the oil in the crude oil collection section (optional) of the tank is transported out through the external pipeline 15, and the water at the bottom is transported to the sewage treatment process through the pipeline 17. Some of the water is circulated to the sand flushing water pipeline 16 as a sand flushing water source, and the sand flushing manifold 18 is used to blow away the mud and sand at the bottom of the separator tank.

[0074] To further improve processing efficiency, the crude oil produced fluid is heated to a certain extent by heating equipment or heat exchanger before entering the separator tubular distributor, and an appropriate amount of demulsifier is added to the incoming fluid through the chemical pipeline.

[0075] Compared with other similar devices in the field, this utility model has the following advantages:

[0076] 1. For the treatment of oil-water emulsions in the separator, compared with centrifugation, chemical demulsification, flash evaporation and other treatment methods, the three-phase separator with multiple electric fields and magnetic fields synergistic enhancement requires fewer processing units, has higher processing efficiency, and does not require large-scale heating operations or large amounts of chemical reagents, which can significantly save processing costs and ensure stable and efficient operation of the separator while improving processing efficiency.

[0077] 2. The electric field generated by the medium-low pressure bare electrode electric field demulsification system, the magnetic field generated by the external fast-conversion electromagnetic field demulsification system and its induced electric field, and the magnetic field generated by the external fast-conversion solenoid demulsification system and its induced electric field simultaneously demulsify the liquid in the tank from different dimensions, enhance the effect of chemical agents, and improve the single-unit processing efficiency of the separator.

[0078] 3. The medium- and low-voltage bare electrode electric field, combined with the power supply device, can effectively treat high-water-content crude oil emulsions instead of conventional high-frequency / high-voltage electric fields, achieving stable dehydration without electric field collapse. The medium- and low-voltage bare electrode electric field is low in cost and easy to install, greatly reducing the manufacturing cost of electric field enhanced three-phase separators.

[0079] 4. The external fast-changing electromagnetic field demulsification system and the external fast-changing solenoid demulsification system are located outside the separator tank, making maintenance convenient. The electric field induced by the external fast-changing electromagnetic field demulsification system and the external fast-changing solenoid demulsification system will not have ineffective power loss or electric field collapse phenomenon because there is no current loop.

[0080] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of this utility model and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. A three-phase separator with synergistic reinforcement of electric and magnetic fields, characterized in that, The separator tank is connected with a crude oil pipeline (3), a water injection pipeline (2) and a chemical injection pipeline (1) at one end, connected with an oil outlet pipeline (15) at the other end, connected with a gas outlet pipeline (14) at the upper part, and connected with a drainage pipeline (17) at the lower part, wherein a side branch of the drainage pipeline (17) is connected with a mud flushing water pipeline (16) through a water pump; A tubular distributor (7) is arranged in the separator tank and connected with the crude oil pipeline (3), and a region from the tubular distributor (7) to the oil outlet pipeline (15) is a crude oil treatment region; A middle-low voltage bare electrode electric field demulsification system (8) is arranged in the separator tank, and a fast conversion electromagnetic field demulsification system (12) and a fast conversion solenoid demulsification system (13) are arranged outside the separator tank; A power supply device (10) and a power supply wiring concentrator (11) are arranged outside the separator tank.

2. The triple-phase separator reinforced by multiple electric field and magnetic field synergy according to claim 1, characterized in that, The fast conversion electromagnetic field demulsification system (12) comprises a plurality of annular cores, the annular cores are sleeved on the separator tank, and a fast conversion excitation winding is arranged on each annular core; An insulating fixing support is arranged between the annular core and the separator tank, and the fast conversion excitation winding is embedded in the insulating fixing support.

3. The triple-phase separator reinforced by multiple electric field and magnetic field synergy according to claim 2, characterized in that, The fast conversion excitation windings on the plurality of annular cores are all connected in parallel and are supplied with power by one excitation power supply device. Alternatively, the fast conversion excitation windings are connected in parallel in groups, and each group is supplied with power by one excitation power supply device.

4. The triple-phase separator reinforced by multiple electric field and magnetic field synergy according to claim 1, characterized in that, The fast conversion solenoid demulsification system (13) is a common high-temperature wire which is inserted into an explosion-proof pipe and then wound around the separator tank.

5. The triple-phase separator synergistically reinforced by multiple electric and magnetic fields according to any one of claims 2 to 4, characterized in that, The middle-low voltage bare electrode electric field demulsification system (8), the fast conversion electromagnetic field demulsification system (12) and the fast conversion solenoid demulsification system (13) are separately supplied with power. Alternatively, the middle-low voltage bare electrode electric field demulsification system (8) and the fast conversion solenoid demulsification system (13) are collectively supplied with power through a solenoid.

6. The triple-phase separator reinforced by multiple electric field and magnetic field synergy according to claim 5, characterized in that, An oil collection area and a water collection area are arranged at the rear of the three-phase separator, and a heating device is arranged outside the separator tank.

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