Tubular quick-change electromagnetic field crude oil demulsification device

Abstract

The invention 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 an excitation winding, and all the excitation windings are connected with fast-change excitation 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] The invention relates to an electromagnetic field demulsification device, in particular to a tubular fast-changing electromagnetic field crude oil demulsification device. Background Art

[0002] Whether in upstream crude oil extraction or downstream petrochemical industry, the demulsification and dehydration problem of water-in-oil (W / O) emulsions is often encountered. Common demulsification methods for water-in-oil (W / O) emulsions include thermal demulsification, chemical demulsification, electric field demulsification, etc. Among them, electric field demulsification has been widely used due to its advantages of high efficiency, environmental protection, and energy saving. The commonly used electric field demulsification and dehydration equipment is an electric dehydrator, whose working principle is to combine the electric field demulsification and gravity sedimentation process into one. In order to ensure the smooth progress of gravity sedimentation, conventional electric dehydrators maintain a laminar flow state in the tank, but this is contrary to the concept of appropriate turbulence to promote the collision and agglomeration of dispersed phase water particles.

[0003] In the prior art, in response to the above problems, researchers have proposed a dehydration scheme that separates the electric field demulsification from the gravity sedimentation process, that is, first implement the electric field demulsification and then implement the oil-water gravity sedimentation separation, and use insulated electrodes to participate in the implementation of the electric field demulsification to prevent the formation of water chains between the electrodes when the water content is high and cause a short circuit. For example, in 2023, Zhang Baosheng and others from Beijing University of Petrochemical Technology proposed an electric field demulsifier, which 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 tube shell, and a grounding electrode plate and a high-voltage insulated electrode electrically connected to a power supply are arranged in the tube shell.

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

[0005] The demulsifier needs to be equipped with an insulated high-voltage electrode, which has a complex structure, is difficult to install and manufacture, and is prone to problems such as breakdown.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The purpose of the present 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 the present invention is achieved through the following technical solutions:

[0009] The tubular fast-changing electromagnetic field crude oil demulsification device of the present invention is characterized in that it comprises a pipeline body and a fast-changing electromagnetic field device;

[0010] The pipeline body 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 connected by bolts, and 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] The fast-changing electromagnetic field device is used to couple and generate fast-changing electric and magnetic fields in a pipeline to demulsify and aggregate dispersed phase water particles in the pipeline.

[0013] Compared with the prior art, the tubular fast-changing electromagnetic field crude oil demulsification device provided by the present invention has a simple structure and is easy to install and transform old equipment. When the dispersed phase water particles of the crude oil emulsion pass through the tubular demulsification device, under the action of the fast-changing electromagnetic field, the dispersed phase water particles collide and agglomerate, thereby improving the demulsification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a tubular fast-changing electromagnetic field crude oil demulsification device provided in an embodiment of the present invention;

[0015] The symbols in the figure represent the following:

[0016] 1-Metal flange 1, 2-Soft magnetic material core, 3-Quick change excitation coil winding, 4-Cable explosion-proof gland, 5-Excitation coil winding explosion-proof housing, 6-Flange insulation pad, 7-90° elbow, 8-Straight pipe 2, 9-Straight pipe 1, 10-Grounding cable. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0018] First, the terms that may be used in this article are explained as follows:

[0019] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0020] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0021] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0022] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0023] The contents not described in detail in the examples of the present invention belong to the prior art known to professionals in the field. If no specific conditions are specified in the examples of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used in the examples of the present invention, they are all conventional products that can be purchased commercially.

[0024] The tubular fast-changing electromagnetic field crude oil demulsification device of the present invention comprises a pipeline body and a fast-changing electromagnetic field device;

[0025] The pipeline body 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 connected by bolts, and the other end of the elbow 7 is welded to the straight pipe 2 8;

[0026] 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;

[0027] The fast-changing electromagnetic field device is used to generate a fast-changing electromagnetic field in a pipeline to demulsify and aggregate dispersed phase water particles in the pipeline.

[0028] The metal flange 1 is connected to the external oil pipeline.

[0029] The fast-changing electromagnetic field device comprises a plurality of annular soft magnetic material cores 2, the plurality of soft magnetic material cores 2 are sleeved on the straight tube 9, and a fast-changing excitation winding 3 is arranged on each soft magnetic material core 2;

[0030] An insulating fixing bracket is arranged between the soft magnetic material core 2 and the straight tube 9 , and the insulating fixing bracket fixes an excitation coil winding explosion-proof housing 5 , and the excitation coil winding 3 is pre-buried in the excitation coil winding explosion-proof housing 5 .

[0031] A plurality of fast-changing excitation windings 3 are all connected in parallel and powered by an excitation power supply device;

[0032] Alternatively, a plurality of fast-changing excitation windings are grouped in three and connected in parallel, each group is powered by an excitation power supply device, and the waveforms generated by the plurality of excitation power supply devices need to be consistent in phase.

[0033] The current change rate in the fast-changing excitation coil winding 3 is ≥10A / us; the voltage is between 50V and 5kV;

[0034] The excitation frequency of the fast-changing excitation coil winding 3 has three frequency adjustment intervals:

[0035] Frequency adjustment interval 1 is the normal frequency interval between 500Hz and 20kHz;

[0036] Frequency adjustment interval 2 is the ultra-high frequency interval between 20kHz and 250kHz;

[0037] Frequency adjustment interval 3 is a near-microwave frequency interval between 500kHz and 500MHz;

[0038] When exciting the excitation coil winding 3, various optimized composite frequencies are adopted; the excitation voltage waveform is a rectangular wave, an AC square wave or agile frequency conversion; various adjustment methods are all for adapting to the targeted demulsification of crude oils with different properties.

[0039] The fast-changing excitation winding 3 is connected to the excitation power supply device through a cable explosion-proof cable gland 4;

[0040] The straight pipe 9 is provided with a grounding cable 10.

[0041] In summary, it can be seen that the tubular fast-changing electromagnetic field crude oil demulsification device of the embodiment of the present invention has a simple structure and is easy to install and transform old equipment. When the dispersed phase water particles of the crude oil emulsion pass through the tubular demulsification device, under the action of the fast-changing electromagnetic field, the dispersed phase water particles collide and agglomerate, thereby improving the demulsification efficiency.

[0042] The device is installed at the liquid inlet section of a three-phase separator or an electric dehydrator, which can greatly improve the separation efficiency and is suitable for retrofitting and modifying old equipment and processes.

[0043] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

[0044] The tubular fast-changing electromagnetic field crude oil demulsification device of the present invention comprises a pipeline body and a fast-changing electromagnetic field device, wherein the fast-changing electromagnetic field device is installed outside the pipeline between flange 1 and flange 2, and 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 fast-changing electric and magnetic fields in the pipeline to demulsify and aggregate dispersed phase water particles in the pipeline.

[0045] The present invention aims at solving the difficult problem of crude oil demulsification and separation treatment. The invention adopts the principle of first implementing electromagnetic field demulsification and then implementing oil-water gravity sedimentation separation. A fast-changing electromagnetic field is set in the liquid inlet section of a three-phase separator or an electric dehydrator to realize the demulsification and agglomeration process of dispersed phase water particles. A demulsifier can be combined to strengthen the chemical demulsification effect, thereby improving the oil-water separation efficiency and substantially shortening the treatment time.

[0046] When the tubular fast-changing electromagnetic field crude oil demulsification device in the present invention processes emulsion, no current flows through the emulsion. Compared with other electric field demulsification devices with electrodes, there is no ineffective energy consumption, and the power consumption is greatly reduced. The device does not need to set electrodes, and the structure is simple and the cost is low when new equipment is built. The existing process does not need to be interrupted when the original equipment is modified, and the installation of equipment is also simple and convenient.

[0047] On the one hand, the present invention can specifically adjust the fast-changing excitation parameters such as the excitation voltage, excitation waveform and excitation frequency according to the state and properties of the crude oil emulsion, and also change the characteristics of the induced electric field; on the other hand, the external fast-changing electromagnetic field is adopted, which changes the built-in structure of the conventional crude oil demulsification electrode, saves the construction and transformation costs, and can save the subsequent maintenance costs to a great extent.

[0048] Example 1

[0049] like Figure 1As shown, a schematic diagram of the structure of a tubular fast-changing electromagnetic field crude oil demulsification device is provided. This embodiment provides a tubular fast-changing electromagnetic field crude oil demulsification device, which can change the diameter of the pipeline according to the application scenario so that it can be installed in front of a traditional crude oil electric dehydrator to enhance the demulsification effect of the original equipment and reduce the water-cut oil content of the original equipment; it can also be used as a separate demulsification device and installed in front of a three-phase separator to provide efficient crude oil demulsification function; it can also be installed in the mixing pipe section of the demulsifier addition process to enhance the chemical demulsification function of the demulsifier.

[0050] After the crude oil produced is processed at the previous stage, it enters the straight pipe part of the device through the metal flange, passes through the fast-changing electromagnetic field crude oil demulsification device in the pipe, and then enters the next stage crude oil processing equipment;

[0051] Traditional tank-type crude oil demulsification equipment places the electrodes that provide the electric field inside the container. After long-term use, the electrodes in the tank are easily damaged due to breakdown and other reasons. The equipment often needs to be stopped and professional tank operators are required to replace the electrodes, which will cause certain economic losses and high maintenance costs.

[0052] The tubular fast-change electromagnetic field crude oil demulsification device includes a pipeline body and a fast-change electromagnetic field device. There is no equipment in the pipeline and it only provides a crude oil channel. The fast-change electromagnetic field device is placed outside the pipeline and will not damage the original pipeline. The later equipment update and maintenance costs are low and the update and maintenance difficulty is small.

[0053] In this embodiment, the core is made of soft magnetic materials, such as silicon steel sheets, ferrites, iron-based amorphous materials, iron-based microcrystalline materials, etc., and the corresponding materials can be used according to the crude oil processing scenario and in combination with the requirements of cost, crude oil dehydration effect, etc.;

[0054] The insulating flange in this embodiment is a pipe flange joint that has both the sealing performance required by buried steel pipelines and the electrical insulation performance required by electrical corrosion protection projects. It can be composed of a flange insulating gasket installed between two butt-welded flat flanges and an insulating sleeve and insulating bolt gasket installed on the fastening bolts. The flange insulating gasket material can be made of oil-resistant rubber asbestos board, chloroprene rubber board, fabric-based chloroprene rubber board, polytetrafluoroethylene and other materials. The insulating bolt sleeve and the bolt insulating gasket can be made of high-strength phenolic laminated cloth board and cloth pressing tube.

[0055] Compared with other similar devices in the field, the present invention has the following advantages:

[0056] (1) For the demulsification and separation treatment of crude oil emulsion, compared with the traditional tank-type crude oil processing device, the tubular fast-change electromagnetic field crude oil demulsification device requires fewer processing units, has low construction or modification costs, and has low subsequent maintenance costs and maintenance difficulties.

[0057] (2) The tubular fast-change electromagnetic field crude oil demulsification device can, on the one hand, adjust the fast-change excitation parameters such as the excitation voltage, excitation waveform and excitation frequency in a targeted manner according to the state and properties of the crude oil emulsion, and at the same time, change the characteristics of the induced electric field; for different crude oil flow rates and different crude oil emulsion contents, the fast-change magnetic field can be adjusted in a targeted manner to improve the demulsification efficiency of the crude oil demulsification device.

[0058] (3) The external installation method makes the installation of the device more convenient and the installation location more flexible. It can be used alone or to enhance the demulsification capacity of traditional crude oil dehydration facilities.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the 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: It includes a pipeline body and a fast-changing electromagnetic field device; The pipeline body comprises 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 (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 connected by bolts, and the other end of the elbow (7) is welded to the straight pipe 2 (8); The fast-changing electromagnetic field device is installed outside the straight pipe (9), and the fast-changing electromagnetic field device is connected to an external excitation power supply; The fast-changing electromagnetic field device is used to generate a fast-changing electromagnetic field in a pipeline to demulsify and aggregate dispersed phase water particles in the pipeline.

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

3. The tubular fast-changing electromagnetic field crude oil demulsification device according to claim 1 is characterized in that: The fast-changing electromagnetic field device comprises a plurality of annular soft magnetic material cores (2), the plurality of soft magnetic material cores (2) being sleeved on the straight tube (9), and a fast-changing excitation winding (3) being arranged on each soft magnetic material core (2); An insulating fixing bracket is provided between the soft magnetic material core (2) and the straight tube (9), and an excitation coil winding explosion-proof housing (5) is fixed to the insulating fixing bracket. The excitation coil winding (3) is pre-buried in the excitation coil winding explosion-proof housing (5).

4. The tubular fast-changing electromagnetic field crude oil demulsification device according to claim 3 is characterized in that: A plurality of fast-changing excitation windings (3) are all connected in parallel and powered by an excitation power supply device; Alternatively, a plurality of fast-changing excitation windings (3) are grouped and connected in parallel, each group is powered by an excitation power supply device, and the waveforms generated by the plurality of excitation power supply devices need to be consistent in phase.

5. The tubular fast-changing electromagnetic field crude oil demulsification device according to claim 4 is characterized in that: The current change rate in the fast-changing excitation coil winding (3) is ≥10A / us; the voltage is between 50V and 5kV; The excitation frequency of the fast-changing excitation coil winding (3) has three frequency adjustment ranges: Frequency adjustment interval 1 is the normal frequency interval between 500Hz and 20kHz; Frequency adjustment interval 2 is the ultra-high frequency interval between 20kHz and 250kHz; Frequency adjustment interval 3 is a near-microwave frequency interval between 500kHz and 500MHz; The excitation coil winding (3) is excited by an optimized combination of various frequencies; the excitation voltage waveform is a rectangular wave, an AC square wave or agile frequency conversion; various adjustment methods are all for adapting to the targeted demulsification of crude oils with different properties.

6. The tubular fast-changing electromagnetic field crude oil demulsification device according to any one of claims 3 to 5, characterized in that: The fast-changing excitation winding (3) is connected to the excitation power supply device through a cable explosion-proof cable gland (4); The straight pipe 1 (9) is provided with a grounding cable (10).

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