Tubular quick-change electromagnetic field crude oil demulsification device

Abstract

The utility model discloses a tubular quick-change electromagnetic field crude oil demulsification and dehydration device which comprises a pipeline, a quick-change electromagnetic field device and the like, the pipeline is divided into a metal flange, an insulating flange pad, a straight pipe I, a straight pipe II and a 90-degree elbow; the alternating electromagnetic device comprises an iron core, a magnet exciting coil, a conductive cable and an insulating bracket; a plurality of closed-loop iron cores made of soft magnetic materials are sleeved on the straight pipe I and are fixed by an insulating bracket; each closed-loop iron core is wound with a magnet exciting coil winding, and all the magnet exciting coil windings are connected with fast-change exciting current; the tubular crude oil demulsification and dehydration device capable of quickly changing the electromagnetic field is simple in structure, old equipment can be easily added and transformed, when dispersed phase water particles of crude oil emulsion pass through the tubular demulsification device, the dispersed phase water particles collide and coalesce under the action of the quick-change electromagnetic field, and the demulsification efficiency is improved.

Description

Technical Field

[0001] This utility model relates to an electromagnetic field demulsification device, and more particularly to a tubular fast-changing electromagnetic field crude oil demulsification device. Background Technology

[0002] Whether in upstream crude oil extraction or downstream petrochemicals, the demulsification and dehydration of water-in-oil (W / O) emulsions is a frequent problem. Commonly used demulsification methods for W / O emulsions include thermal demulsification, chemical demulsification, and electric field demulsification. Among these, electric field demulsification is widely used due to its advantages such as high efficiency, environmental friendliness, and energy saving. The commonly used electric field demulsification and dehydration equipment is the electric dehydrator, which combines the electric field demulsification process with gravity sedimentation. To ensure smooth gravity sedimentation, conventional electric dehydrators maintain a laminar flow state inside the tank, but this contradicts the principle of promoting the collision and aggregation of dispersed water particles through appropriate turbulence.

[0003] In existing technologies, to address the aforementioned problems, researchers have proposed separating the electric field demulsification process from the gravity sedimentation process. This involves performing electric field demulsification first, followed by gravity sedimentation to separate the oil and water. Insulated electrodes are used in the electric field demulsification process to prevent water chains from forming between the electrodes and causing short circuits when the water content is high. For example, in 2023, Zhang Baosheng et al. from Beijing Institute of Petrochemical Technology proposed an electric field demulsifier. This demulsifier includes an electric field demulsification section, an inlet section for the emulsion to flow in, and an outlet section for the emulsion to flow out. The electric field demulsification section includes a shell containing a grounded electrode plate and a high-voltage insulated electrode electrically connected to a power source.

[0004] The aforementioned prior art has at least the following problems:

[0005] Demulsifiers require insulated high-voltage electrodes, have a complex structure, are difficult to install and manufacture, and are prone to problems such as breakdown.

[0006] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a tubular fast-changing electromagnetic field crude oil demulsification device to solve the above-mentioned technical problems existing in the prior art.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] The present invention relates to a tubular fast-changing electromagnetic field crude oil demulsification device, characterized in that it comprises a pipeline body and a fast-changing electromagnetic field device.

[0010] The main body of the pipeline includes a straight pipe 1 9, an elbow 7 and a straight pipe 2 8. The two ends of the straight pipe 1 9 are respectively provided with a metal flange 1 and a metal flange 2. One end of the elbow 7 is provided with a metal flange 3. A flange insulating gasket 6 is provided between the metal flange 3 and the metal flange 2 and is connected by bolts. The other end of the elbow 7 is welded to the straight pipe 2 8.

[0011] The fast-changing electromagnetic field device is installed outside the straight tube 9, and the fast-changing electromagnetic field device is connected to an external excitation power supply.

[0012] Compared with the prior art, the tubular fast-changing electromagnetic field crude oil demulsifier provided by this utility model has a simple structure and is easy to install and modify on old equipment. When the dispersed phase water particles of crude oil emulsion pass through the tubular demulsifier, under the action of the fast-changing electromagnetic field, the dispersed phase water particles collide and aggregate, thereby improving the demulsification efficiency. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the tubular fast-conversion electromagnetic field crude oil demulsification device provided in this embodiment of the present invention;

[0014] The meanings represented by each mark in the diagram are as follows:

[0015] 1-Metal flange one, 2-Soft magnetic material core, 3-Excitation coil winding, 4-Explosion-proof cable gland, 5-Explosion-proof housing of excitation coil winding, 6-Flange insulating gasket, 7-90° elbow, 8-Straight pipe two, 9-Straight pipe one, 10-Grounding cable. Detailed Implementation

[0016] 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.

[0017] First, the following explanations are provided for the terms that may be used in this article:

[0018] 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".

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] This utility model relates to a tubular fast-changing electromagnetic field crude oil demulsification device, which includes a pipeline body and a fast-changing electromagnetic field device.

[0024] The main body of the pipeline includes a straight pipe 1 9, an elbow 7 and a straight pipe 2 8. The two ends of the straight pipe 1 9 are respectively provided with a metal flange 1 and a metal flange 2. One end of the elbow 7 is provided with a metal flange 3. A flange insulating gasket 6 is provided between the metal flange 3 and the metal flange 2 and is connected by bolts. The other end of the elbow 7 is welded to the straight pipe 2 8.

[0025] The fast-changing electromagnetic field device is installed outside the straight tube 9, and the fast-changing electromagnetic field device is connected to an external excitation power supply;

[0026] The fast-changing electromagnetic field device is used to couple and generate a fast-changing electric field and magnetic field inside the pipeline to demulsify and aggregate the dispersed phase water particles inside the pipeline.

[0027] The metal flange 1 is connected to the external oil supply pipeline.

[0028] The fast-changing electromagnetic field device includes multiple annular soft magnetic material cores 2, which are sleeved on the straight tube 9. Each soft magnetic material core 2 is provided with an excitation coil winding 3.

[0029] An insulating fixing bracket is provided between the soft magnetic material core 2 and the straight tube 9. The insulating fixing bracket fixes the explosion-proof housing 5 of the excitation coil winding. All the excitation coil windings 3 are pre-embedded in the explosion-proof housing 5 of the excitation coil winding.

[0030] Multiple excitation coil windings 3 are all connected in parallel and powered by a single excitation power supply device;

[0031] Alternatively, multiple excitation coil windings can be connected in parallel in three groups, with each group powered by an excitation power supply device. The waveforms generated by the multiple excitation power supply devices must be in phase.

[0032] The current change rate in the excitation coil winding 3 is ≥10A / µs; the voltage is between 50V and 5kV.

[0033] The excitation frequency of excitation coil winding 3 has three frequency adjustment ranges:

[0034] Frequency adjustment range 1 is the normal frequency range between 500Hz and 20kHz;

[0035] Frequency adjustment range 2 is the ultra-high frequency range, between 20kHz and 250kHz;

[0036] Frequency adjustment range 3 is the near-microwave frequency range between 500kHz and 500MHz;

[0037] The excitation coil winding 3 uses various optimized composite frequencies during excitation; the excitation voltage waveform is a rectangular wave, an AC square wave, or a frequency-sensitive wave; all adjustment methods are designed to adapt to the targeted demulsification of crude oils with different properties.

[0038] The excitation coil winding 3 is connected to the excitation power supply device by a cable led out through the explosion-proof cable gland 4.

[0039] The straight pipe 9 is equipped with a grounding cable 10.

[0040] In summary, the tubular fast-changing electromagnetic field crude oil demulsifier of this utility model embodiment has a simple structure and is easy to install and modify on old equipment. When the dispersed phase water particles of crude oil emulsion pass through the tubular demulsifier, under the action of the fast-changing electromagnetic field, the dispersed phase water particles collide and aggregate, thereby improving the demulsification efficiency.

[0041] This device is installed in the inlet section of a three-phase separator or an electric dehydrator, which can significantly improve separation efficiency and is suitable for retrofitting and upgrading old equipment and processes.

[0042] 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.

[0043] This utility model discloses a tubular fast-changing electromagnetic field crude oil demulsification device, which includes a pipeline body and a fast-changing electromagnetic field device. The fast-changing electromagnetic field device is installed outside the pipeline between flange one and flange two. The fast-changing electromagnetic field device is connected to an external excitation power supply. The fast-changing electromagnetic field device is used to couple and generate a fast-changing electric field and magnetic field inside the pipeline to demulsify and aggregate the dispersed phase water particles inside the pipeline.

[0044] This invention addresses the challenge of crude oil demulsification and separation by employing a principle of first implementing electromagnetic field demulsification followed by gravity sedimentation separation of oil and water. A rapidly changing electromagnetic field is set in the inlet section of a three-phase separator or electrostatic dehydrator to achieve the demulsification and aggregation process of dispersed water particles. Furthermore, it can be combined with a demulsifier to enhance the chemical demulsification effect, thereby improving oil-water separation efficiency and significantly shortening the processing time.

[0045] The tubular fast-conversion electromagnetic field crude oil demulsifier of this invention processes emulsions without current flowing through them. Compared to other electric field demulsifiers with electrodes, it eliminates ineffective energy consumption and significantly reduces power consumption. This device requires no electrodes, resulting in a simple and low-cost structure for new installations, and modifications to existing equipment do not require interruption of the current process. Adding equipment is also simple and convenient.

[0046] This invention, on the one hand, can adjust the excitation voltage, excitation waveform, and excitation frequency and other fast-changing excitation parameters in a targeted manner according to the state and properties of crude oil emulsion, and also changes the characteristics of the induced electric field; on the other hand, it adopts an external fast-changing electromagnetic field, which changes the conventional internal structure of crude oil demulsification electrodes, saves construction and modification costs, and can save a large amount of later maintenance costs. Example

[0047] like Figure 1The diagram shows a tubular fast-changing electromagnetic field crude oil demulsification device. This embodiment provides a tubular fast-changing electromagnetic field crude oil demulsification device that can change the diameter of the pipeline according to the application scenario, so as to be installed before the traditional crude oil electrostatic dehydrator to enhance the demulsification effect of the original equipment and reduce the oil content of the original equipment; it can also be used as a demulsification device alone, installed before the three-phase separator, to provide efficient crude oil demulsification function; it can also be installed in the mixing section of the demulsifier addition process to enhance the chemical demulsification function of the demulsifier.

[0048] After being processed in the previous stage, the crude oil produced fluid enters a section of the straight pipe of the unit through a metal flange, passes through the fast-changing electromagnetic field crude oil demulsifier inside the pipe, and then enters the next stage of crude oil processing equipment.

[0049] Traditional tank-type crude oil demulsification equipment places the electrodes that provide the electric field inside the container. After long-term use, the electrodes inside the tank are easily damaged due to breakdown and other reasons, which often requires the equipment to be shut down and professional tank operators to replace the electrodes, resulting in certain economic losses and high maintenance costs.

[0050] The tubular fast-changing electromagnetic field crude oil demulsification device includes a pipeline body and a fast-changing electromagnetic field device. There is no equipment inside the pipeline, which only provides a crude oil passage. The fast-changing electromagnetic field device is placed outside the pipeline, so it will not damage the original pipeline. The cost of subsequent equipment upgrades and maintenance is low, and the upgrades and maintenance are easy.

[0051] In this embodiment, the core is made of soft magnetic materials, such as silicon steel sheets, ferrite, iron-based amorphous materials, iron-based microcrystalline materials, etc. The appropriate materials can be selected according to the crude oil processing scenario and the requirements of cost and crude oil dehydration effect.

[0052] The insulating flange in this embodiment is a pipe flange joint that simultaneously possesses the sealing performance required for buried steel pipelines and the electrical insulation performance required for electrochemical corrosion protection engineering. Its structure can consist of an insulating gasket between two weld neck flanges and insulating sleeves and insulating bolt washers on the fastening bolts. The insulating gasket material can be made of oil-resistant rubber asbestos board, neoprene rubber board, fabric-based neoprene rubber board, or polytetrafluoroethylene (PTFE), etc. The insulating bolt sleeves and bolt insulating washers can be made of high-strength phenolic laminated fabric board and press-fit tubing.

[0053] Compared with other similar devices in the field, this utility model has the following advantages:

[0054] (1) For the demulsification and separation of crude oil emulsion, compared with the traditional tank crude oil processing unit, the tubular fast conversion electromagnetic field crude oil demulsification unit requires fewer processing units, has lower construction or modification costs, and lower maintenance costs and difficulties in the later stage.

[0055] (2) The tubular fast-changing electromagnetic field crude oil demulsifier can adjust the fast-changing excitation parameters such as excitation voltage, excitation waveform and excitation frequency according to the state and properties of crude oil emulsion, and also change the characteristics of the induced electric field. The fast-changing magnetic field can be adjusted in a targeted manner for different crude oil flow rates and crude oil emulsions with different contents, which can improve the demulsification efficiency of the crude oil demulsifier.

[0056] (3) The external installation method makes the installation more convenient and the installation location more flexible. It can be used alone or to enhance the demulsification ability of traditional crude oil dehydration facilities.

[0057] 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 tubular fast-changing electromagnetic field crude oil demulsification device, characterized in that, Includes the main pipe body and the fast-changing electromagnetic field device; The main body of the pipeline includes a straight pipe (9), an elbow (7) and a straight pipe (8). The two ends of the straight pipe (9) are respectively provided with a metal flange (1) and a metal flange (2). One end of the elbow (7) is provided with a metal flange (3). A flange insulating gasket (6) is provided between the metal flange (3) and the metal flange (2) and they are connected by bolts. The other end of the elbow (7) is welded to the straight pipe (8). The fast-changing electromagnetic field device is installed outside the straight tube (9) and is connected to an external excitation power supply.

2. The tubular fast-changing electromagnetic field crude oil demulsification device according to claim 1, characterized in that, The metal flange (1) is connected to the external oil pipeline.

3. The tubular fast-changing electromagnetic field crude oil demulsification device according to claim 1, characterized in that, The fast-changing electromagnetic field device includes multiple ring-shaped soft magnetic material cores (2), which are sleeved on the straight tube (9), and each soft magnetic material core (2) is provided with an excitation coil winding (3). There is an insulating fixing bracket between the soft magnetic material core (2) and the straight tube (9), and the insulating fixing bracket is fixed with the excitation coil winding explosion-proof shell (5). The excitation coil winding (3) is embedded in the excitation coil winding explosion-proof shell (5).

4. The tubular fast-conversion electromagnetic field crude oil demulsification device according to claim 3, characterized in that, Multiple excitation coil windings (3) are all connected in parallel and powered by a single excitation power supply device; Alternatively, multiple excitation coil windings (3) can be grouped and connected in parallel, with each group powered by an excitation power supply device.

5. The tubular fast-changing electromagnetic field crude oil demulsification device according to claim 3 or 4, characterized in that, The excitation coil winding (3) is connected to the excitation power supply device by a cable led out through the explosion-proof cable gland (4); The straight pipe (9) is equipped with a grounding cable (10).

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