A pipeline scale prevention device based on photoelectric driving alternating magnetic field

Abstract

The present application relates to the oilfield gathering pipeline antifouling technical field, specifically propose a kind of pipeline antifouling device based on photoelectric drive alternating magnetic field, comprising: pipe body, rotating drum and double electromagnetic coil;The outer periphery of pipe body is provided with opening;Rotating drum is coaxially rotationally arranged in pipe body, and the outer periphery of rotating drum is respectively provided with first light reaction zone and second light reaction zone on both sides, and first light reaction zone and second light reaction zone are arranged in dislocation;The opening of pipe body is aligned with first light reaction zone and second light reaction zone and is arranged;Double electromagnetic coil is provided with clockwise coil and counterclockwise coil, clockwise coil is embedded in the inner wall of rotating drum corresponding to first light reaction zone, and counterclockwise coil is embedded in the inner wall of rotating drum corresponding to second light reaction zone.The alternating magnetic field generation of zero external power supply is realized, the energy consumption is reduced, the setting requirement of control unit is eliminated, the wiring mode is simplified, the failure probability is reduced, the application limitation is overcome, and the application range is improved.

Description

Technical Field

[0001] This invention belongs to the field of scale prevention technology for oilfield gathering and transportation pipelines, and specifically relates to a pipeline scale prevention device based on photoelectric driven alternating magnetic field. Background Technology

[0002] During oilfield production, high-temperature and high-pressure fluids face severe scaling problems on the inner walls of pipelines during transportation. This not only reduces the effective flow cross-sectional area of ​​the pipeline but also increases transportation energy consumption and accelerates localized corrosion and perforation, leading to decreased operating efficiency of the oilfield gathering and transportation system, increased maintenance costs, and even unplanned production shutdowns. Therefore, scale prevention treatment for oilfield pipelines is particularly important.

[0003] Existing oilfield pipelines generally achieve scale prevention treatment by generating alternating magnetic fields. For example, patent document CN118321276A discloses an alternating magnetic field descaling device, including a control unit, at least one set of descaling units, and a power supply. The power supply is electrically connected to the control unit and the at least one set of descaling units to supply power to the control unit and the at least one set of descaling units. Each set of descaling units includes a first alternating signal generating circuit and a second alternating signal generating circuit, a first coil and a second coil, as well as a first magnetic ring and a second magnetic ring. The first alternating signal generating circuit is electrically connected to the first coil, and the first coil is wound on the first magnetic ring. The second alternating signal generating circuit is electrically connected to the second coil, and the second coil is wound on the second magnetic ring. The control unit controls the timing of the waveform signals generated by the first alternating signal generating circuit and the second alternating signal generating circuit to generate alternating waveform signals, thereby generating alternating first alternating magnetic fields and second alternating magnetic fields. However, the aforementioned anti-scaling treatments for oilfield pipelines generally require an external power supply to provide energy for the alternating magnetic field, resulting in high energy consumption for the anti-scaling treatment. In addition, the presence of control units makes the wiring of the overall structure more complex, which makes it prone to failure. Summary of the Invention

[0004] To address the above problems, this invention proposes a pipe anti-scaling device based on a photoelectric driven alternating magnetic field, comprising:

[0005] The tube body has an opening on its outer periphery;

[0006] A rotating cylinder is coaxially rotatably disposed inside the tube, and a first photoreaction zone and a second photoreaction zone are respectively disposed on both sides of the outer periphery of the rotating cylinder, with the first photoreaction zone and the second photoreaction zone being staggered.

[0007] The opening of the tube is aligned with the first photoreaction zone and the second photoreaction zone;

[0008] The device has two electromagnetic coils, one clockwise and one counterclockwise. The clockwise coil is embedded in the inner wall of the rotating cylinder corresponding to the first photoreaction zone, and the counterclockwise coil is embedded in the inner wall of the rotating cylinder corresponding to the second photoreaction zone.

[0009] In some specific embodiments, the rotating drum includes:

[0010] The first half-sector, wherein the first photosensitive region is disposed on the outer periphery of the first half-sector;

[0011] The second half-sector, wherein the second photosensitive region is disposed on the outer periphery of the second half-sector;

[0012] The first half and the second half together form the rotating cylinder.

[0013] In some specific embodiments, a bearing is fitted on the outer periphery of the rotating drum, and the rotating drum is rotatably connected to the inner wall of the tube body through the bearing.

[0014] In some specific embodiments, the clockwise coil and the counterclockwise coil are arranged along the axial direction of the rotating drum;

[0015] One side of the clockwise coil is embedded in the inner wall of the first half-sector corresponding to the first photosensitive region;

[0016] One side of the counterclockwise coil is embedded in the inner wall of the second half of the fan corresponding to the second photoreaction zone.

[0017] In some specific embodiments, the clockwise coil and the counterclockwise coil are arranged alternately.

[0018] The clockwise coil is embedded on one side of the end near the first photoreaction zone in the inner wall of the first half of the fan corresponding to the first photoreaction zone.

[0019] The counterclockwise coil is embedded on one side of the end near the second photoreaction zone in the inner wall of the second half of the fan corresponding to the second photoreaction zone.

[0020] In some specific embodiments, the dual electromagnetic coils are provided with a corrugated structure that extends along the axial direction of the rotating drum.

[0021] In some specific embodiments, the first photoreaction zone and the second photoreaction zone are arranged adjacent to each other along the axial direction of the rotating drum;

[0022] The axial distance between the end of the first photoreaction zone away from the second photoreaction zone and the end of the second photoreaction zone away from the first photoreaction zone is less than or equal to the axial length of the opening of the tube.

[0023] In some specific embodiments, the first photoreaction region and the second photoreaction region are coated with a cadmium sulfide catalyst layer;

[0024] The thickness of the cadmium sulfide catalyst layer is 0.05 mm to 0.1 mm.

[0025] In some specific embodiments, the corrugated structure is detachably disposed within the dual electromagnetic coils;

[0026] The corrugated structure has a corrugation angle of 32 degrees to 68 degrees.

[0027] In some specific embodiments, the central angle of the opening of the tube is 95 to 105 degrees.

[0028] Compared with existing technologies, the pipe anti-scaling device based on photoelectric driven alternating magnetic field of the present invention has at least the following advantages: By rotating the first and second photo-reaction zones within the pipe body via a rotating drum, the first and second photo-reaction zones can sequentially pass through the pipe opening aligned with them, thereby exciting a reverse electromotive force and driving the dual electromagnetic coils to generate an alternating magnetic field. This achieves the generation of an alternating magnetic field with zero external power supply, overcoming the problem of high energy consumption in anti-scaling treatment. Simultaneously, the staggered arrangement of the first and second photo-reaction zones allows the clockwise and counterclockwise coils of the dual electromagnetic coils to alternately generate N→S and S→N magnetic fields, eliminating the need for a control unit and greatly simplifying the overall wiring structure, thus reducing the probability of malfunctions. Furthermore, the photoelectric driven alternating magnetic field overcomes the original limitation of only being applicable to magnetically conductive metal pipes, expanding its application range.

[0029] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1A schematic diagram of a pipe anti-scaling device based on a photoelectric driven alternating magnetic field is shown in an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the rotating drum in an embodiment of the present invention is shown;

[0033] Figure 3 A schematic diagram showing the disassembled rotating drum in an embodiment of the present invention is provided.

[0034] Figure 4 A schematic diagram of a dual electromagnetic coil in an embodiment of the present invention is shown;

[0035] Figure 5 A schematic diagram of the corrugated structure in an embodiment of the present invention is shown;

[0036] Figure 6 A schematic diagram of a bearing according to an embodiment of the present invention is shown.

[0037] In the diagram, 100 is the tube body; 110 is the light-transmitting window; 200 is the rotating cylinder; 210 is the first half-sector; 211 is the first light reaction zone; 220 is the second half-sector; 221 is the second light reaction zone; 230 is the bearing; 240 is the corrugated structure; and 300 is the dual electromagnetic coil. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Reference Figure 1 A pipe anti-scaling device based on a photoelectric driven alternating magnetic field includes: a pipe body 100, a rotating cylinder 200, and a dual electromagnetic coil 300. An opening is formed on the outer periphery of the pipe body 100. The rotating cylinder 200 is coaxially rotatably disposed within the pipe body 100, and a first photoreaction zone 211 and a second photoreaction zone 221 are respectively provided on both sides of the outer periphery of the rotating cylinder 200, with the first photoreaction zone 211 and the second photoreaction zone 221 being staggered. The opening of the pipe body 100 is aligned with the first photoreaction zone 211 and the second photoreaction zone 221. The dual electromagnetic coil 300 is provided with a clockwise coil and a counterclockwise coil. The clockwise coil is embedded in the inner wall of the rotating cylinder 200 corresponding to the first photoreaction zone 211, and the counterclockwise coil is embedded in the inner wall of the rotating cylinder 200 corresponding to the second photoreaction zone 221.

[0040] Specifically, the pipe body 100 is used in oilfield gathering and transportation pipelines, allowing the fluid produced from the oil well to flow through the pipe body 100. The rotating drum 200 is coaxially rotatably disposed inside the pipe body 100, allowing the fluid flowing through the pipe body 100 to also flow through the rotating drum 200. An opening is provided on the outer periphery of the pipe body 100, and a first photoreaction zone 211 and a second photoreaction zone 221 are respectively provided on both sides of the outer periphery of the rotating drum 200, with the first photoreaction zone 211 and the second photoreaction zone 221 staggered. The opening of the pipe body 100 is aligned with the first photoreaction zone 211 and the second photoreaction zone 221, meaning that when the rotating drum 200 drives the first photoreaction zone 211 and the second photoreaction zone 221 to rotate, they can sequentially pass through the opening of the pipe body 100 and protrude from the opening, thereby generating a reverse electromotive force. The dual electromagnetic coil 300 is equipped with a clockwise coil and a counterclockwise coil. The clockwise coil is embedded in the inner wall of the rotating drum 200, and its embedded position corresponds to the position of the first photoreaction zone 211. Thus, the reverse electromotive force excited by the first photoreaction zone 211 can drive the clockwise coil to generate a magnetic field in the N→S direction. The counterclockwise coil is also embedded in the inner wall of the rotating drum 200, but its embedded position corresponds to the position of the second photoreaction zone 221. Thus, the reverse electromotive force excited by the second photoreaction zone 221 can drive the counterclockwise coil to generate a magnetic field in the S→N direction. As the first photoreaction zone 211 and the second photoreaction zone 221 pass through the opening of the tube body 100 in sequence and respectively excite the reverse electromotive force, the dual electromagnetic coil 300 can be driven to form an alternating magnetic field, thereby realizing the generation of an alternating magnetic field with zero external power supply and overcoming the problem of high energy consumption in anti-scaling treatment. Meanwhile, the staggered arrangement of the first photoresponse region 211 and the second photoresponse region 221 allows the clockwise and counterclockwise coils of the dual electromagnetic coils 300 to alternately generate N→S and S→N magnetic fields, thereby eliminating the need for a control unit and greatly simplifying the wiring of the overall structure, thus reducing the probability of malfunctions. Furthermore, by using photoelectric drive to generate alternating magnetic fields, the limitation of being only applicable to magnetically conductive metal pipes can be overcome, expanding the application range.

[0041] In some specific embodiments of the present invention, reference is made to... Figure 2 The rotating cylinder 200 includes a first half-sector 210 and a second half-sector 220. A first light-reacting region 211 is disposed on the outer periphery of the first half-sector 210. A second light-reacting region 221 is disposed on the outer periphery of the second half-sector 220. The first half-sector 210 and the second half-sector 220 together form the rotating cylinder 200.

[0042] Specifically, the first half-segment 210 and the second half-segment 220 together form a rotating cylinder 200. A first photoreaction zone 211 is provided on the outer periphery of the first half-segment 210, and a second photoreaction zone 221 is provided on the outer periphery of the second half-segment 220. This arrangement of the first and second half-segments 210 and 220 facilitates the placement of the first and second photoreaction zones 211 and 221 on opposite sides of the rotating cylinder 200. By defining the positions of the first and second photoreaction zones 211 and 221 on the first and second half-segments 220 respectively, a staggered layout of the first and second photoreaction zones 211 and 221 can be achieved. While reducing energy consumption for anti-scaling treatment by generating an alternating magnetic field with zero external power supply, the simplified wiring of the overall structure also reduces the probability of malfunctions. Furthermore, the photoelectric-driven alternating magnetic field overcomes the original limitation of only being applicable to magnetically conductive metal pipes, expanding the application range.

[0043] In some specific embodiments of the present invention, reference is made to... Figure 1 and Figure 6 A bearing 230 is fitted on the outer periphery of the rotating drum 200, and the rotating drum 200 is rotatably connected to the inner wall of the tube body 100 through the bearing 230.

[0044] Specifically, the bearing 230 is sleeved on the outer periphery of the rotating drum 200, so that the outer periphery of the rotating drum 200 is rotatably connected through the inner wall of the bearing 230 tube 100, thereby ensuring that the rotating drum 200 rotates smoothly within the tube 100.

[0045] In some specific embodiments of the present invention, reference is made to... Figure 3 and Figure 4 The clockwise and counterclockwise coils are arranged along the axial direction of the rotating cylinder 200. One side of the clockwise coil is embedded in the inner wall of the first half-sector 210 corresponding to the first photoresponse zone 211. One side of the counterclockwise coil is embedded in the inner wall of the second half-sector 220 corresponding to the second photoresponse zone 221.

[0046] Specifically, the clockwise and counterclockwise coils are arranged along the axial direction of the rotating cylinder 200. The clockwise coil is positioned corresponding to the first photoresponse area 211, and the counterclockwise coil is positioned corresponding to the second photoresponse area 221. One side of the clockwise coil is embedded in the inner wall of the first half-sector 210 corresponding to the first photoresponse area 211, and the inner wall of the first half-sector 210 where the first photoresponse area 211 is not located is not embedded or connected to either the clockwise or counterclockwise coil. One side of the counterclockwise coil is embedded in the inner wall of the second half-sector 220 corresponding to the second photoresponse area 221, and the inner wall of the second half-sector 220 where the second photoresponse area 221 is not located is not embedded or connected to either the clockwise or counterclockwise coil, thus realizing the arrangement of the clockwise and counterclockwise coils. When the rotating cylinder 200 formed by the first half-fan 210 and the second half-fan 220 rotates, the first photoreaction zone 211 on the outer periphery of the first half-fan 210 and the second photoreaction zone 221 on the outer periphery of the second half-fan 220 pass through the opening of the tube body 100 in sequence and are excited with reverse potential respectively. Thus, the reverse potential drives the clockwise and counterclockwise coils of the dual electromagnetic coils 300 to generate an alternating magnetic field, realizing the generation of an alternating magnetic field with zero external power supply, overcoming the problem of high energy consumption in anti-scaling treatment.

[0047] In some specific embodiments of the present invention, reference is made to... Figure 3 and Figure 4 The clockwise and counterclockwise coils are arranged alternately. The side of the clockwise coil closest to the first photoresponse area 211 is embedded in the inner wall of the first half-sector 210 corresponding to the first photoresponse area 211. The side of the counterclockwise coil closest to the second photoresponse area 221 is embedded in the inner wall of the second half-sector 220 corresponding to the second photoresponse area 221.

[0048] Specifically, the clockwise and counterclockwise coils are arranged alternately. The side of the clockwise coil near the first light reaction area 211 is embedded in the inner wall of the first half-sector 210 corresponding to the first light reaction area 211. The inner wall of the first half-sector 210 where the first light reaction area 211 is not located is not embedded or connected to the clockwise or counterclockwise coil. The side of the counterclockwise coil near the second light reaction area 221 is embedded in the inner wall of the second half-sector 220 corresponding to the second light reaction area 221. The inner wall of the second half-sector 220 where the second light reaction area 221 is not located is not embedded or connected to the clockwise or counterclockwise coil. When the rotating cylinder 200 formed by the first half-fan 210 and the second half-fan 220 rotates, the first photoreaction zone 211 on the outer periphery of the first half-fan 210 and the second photoreaction zone 221 on the outer periphery of the second half-fan 220 pass through the opening of the tube body 100 in sequence and are excited with reverse potential respectively. Thus, the reverse potential drives the clockwise and counterclockwise coils of the dual electromagnetic coils 300 to generate an alternating magnetic field, realizing the generation of an alternating magnetic field with zero external power supply, overcoming the problem of high energy consumption in anti-scaling treatment.

[0049] In some specific embodiments of the present invention, reference is made to... Figure 2 and Figure 3 The double electromagnetic coil 300 is provided with a corrugated structure 240, which extends along the axial direction of the rotating drum 200.

[0050] Specifically, the corrugated structure 240 is located within the dual electromagnetic coils 300 and extends axially along the rotating drum 200. Fluid flowing through the rotating drum 200 can pass through the corrugated structure 240 and interact with its corrugations, thereby driving the rotating drum 200 to rotate. This causes the first photoreaction zone 211 on the outer periphery of the first half-segment 210 and the second photoreaction zone 221 on the outer periphery of the second half-segment 220 of the rotating drum 200 to sequentially pass through the opening of the tube body 100 and generate reverse electromotive forces. These reverse electromotive forces then drive the clockwise and counterclockwise coils of the dual electromagnetic coils 300 to generate an alternating magnetic field. Through the corrugated structure 240, the synergistic driving between hydraulic and photoelectric technologies is achieved, thus realizing the generation of an alternating magnetic field with zero external power supply.

[0051] Furthermore, the wire diameter of both the clockwise and counterclockwise coils of the dual electromagnetic coil 300 is 0.5±0.02 mm. The clockwise coil has 200±5 turns and a resistance of 7.8±0.3 ohms, while the counterclockwise coil has 195±5 turns and a resistance of 7.6±0.3 ohms.

[0052] In some specific embodiments of the present invention, reference is made to... Figure 2 and Figure 3The first photoreaction zone 211 and the second photoreaction zone 221 are arranged adjacent to each other along the axial direction of the rotating cylinder 200. The axial distance between the end of the first photoreaction zone 211 away from the second photoreaction zone 221 and the end of the second photoreaction zone 221 away from the first photoreaction zone 211 is less than or equal to the axial length of the opening of the tube body 100.

[0053] Specifically, the first photoreaction zone 211 and the second photoreaction zone 221 are arranged adjacent to each other along the axial direction of the rotating cylinder 200, meaning that the first photoreaction zone 211 and the second photoreaction zone 221 do not overlap in the axial direction of the rotating cylinder 200. Simultaneously, the axial length of the opening of the tube body 100 along the axial direction of the rotating cylinder 200 is greater than or equal to the axial distance between the end of the first photoreaction zone 211 away from the second photoreaction zone 221 and the end of the second photoreaction zone 221 away from the first photoreaction zone 211 along the axial direction of the rotating cylinder 200. This ensures that both the first photoreaction zone 211 and the second photoreaction zone 221 can be fully exposed through the opening of the tube body 100 when passing through it, thereby guaranteeing the driving effect during photoelectric driving via the first photoreaction zone 211 and the second photoreaction zone 221.

[0054] In some specific embodiments of the present invention, reference is made to... Figure 3 A cadmium sulfide catalyst layer is coated on the first photoreaction region 211 and the second photoreaction region 221. The thickness of the cadmium sulfide catalyst layer is 0.05 mm to 0.1 mm. The purity of cadmium sulfide in the cadmium sulfide catalyst layer is greater than or equal to 99.9%.

[0055] In some specific embodiments of the present invention, reference is made to... Figure 4 and Figure 5 The corrugated structure 240 is detachably housed within the dual electromagnetic coil 300. The corrugation angle of the corrugated structure 240 ranges from 32 degrees to 68 degrees.

[0056] Specifically, when the fluid velocity is in the range of 0.5~1.0 m / s, the corrugation angle of the corrugated structure 240 is 65±3 degrees. When the fluid velocity is in the range of 1.0~1.8 m / s, the corrugation angle of the corrugated structure 240 is 55±3 degrees. When the fluid velocity is in the range of 1.8~2.5 m / s, the corrugation angle of the corrugated structure 240 is 45±3 degrees. When the fluid velocity is greater than 2.5 m / s, the corrugation angle of the corrugated structure 240 is 35±3 degrees. The corrugated structure 240 with the required corrugation angle can be replaced according to the actual flow velocity, thereby facilitating the adjustment of the rotational speed of the rotating drum 200.

[0057] In some specific embodiments of the present invention, reference is made to... Figure 1The central angle of the opening of the tube body 100 is 95 to 105 degrees to ensure that the size of the opening of the tube body 100 meets the usage requirements. A light-transmitting window 110 is provided on the opening of the tube body 100. The thickness of the light-transmitting window 110 is 20 ± 0.5 mm, the light transmittance is greater than or equal to 90%, and the central angle is 100 ± 5 degrees.

[0058] Furthermore, when the application scenario of the pipe anti-scaling device based on photoelectric driven alternating magnetic field is in a high flow velocity zone (flow velocity greater than or equal to 2.0 m / s), the device is installed independently as a single unit. When the application scenario is in a medium flow velocity zone (flow velocity within the range of 1.0~2.0 m / s), the device is installed in pairs, wherein the center distance of the devices is equal to pipe diameter × 15 ± 0.5. When the application scenario is in a low flow velocity zone (flow velocity less than 1.0 m / s), the device is installed in quadruplicate, wherein the center distance of the devices is equal to pipe diameter × 8 ± 0.3.

[0059] Verification Example 1:

[0060] The pipe, with a diameter of 150 mm, transports an oil-water mixture with a water content of 65% and a calcium ion concentration of 1800 mg / L. The designed flow rate is 1.5 m / s. This pipe anti-scaling device, based on a photoelectric driven alternating magnetic field, employs a dual-unit layout with a center-to-center distance of 2250 mm. The corrugated structure uses a standard corrugation angle of 55 ± 3°. The rotating drum has a diameter of 142 mm, and the arc lengths of both the first and second halves are 223 ± 1 mm. The clockwise coil is wound with 200 ± 5 turns of 0.50 mm diameter enameled wire, and the counterclockwise coil is wound with 195 ± 5 turns of 0.50 mm diameter enameled wire. The thickness of the cadmium sulfide catalyst layer in both the first and second photoreaction zones is 0.08 mm. The light-transmitting window is made of UV-blocking PMMA organic glass, with a thickness of 20.0±0.5mm, a central arc angle of 100°±1 degree, and a light transmittance of 92.3%.

[0061] The working process is as follows: when the fluid flows through the corrugated structure with a corrugation angle of 55 degrees, a tangential stress τ=0.21Pa is generated (calculated based on the Navier-Stokes equations), which drives the rotating drum to rotate at a uniform speed of 36r / min. Under the condition of natural light illuminance of 80000lux, when the first light reaction zone rotates into the light-transmitting window, a potential of +0.75V is generated, which drives the clockwise coil to generate a N→S magnetic field of 42Gs. Simultaneously, when the second light reaction zone is in the backlight zone, a potential of -0.72V is generated, which drives the counterclockwise coil to generate a S→N magnetic field of 40Gs. The time taken for the rotating drum to rotate 180 degrees is 0.83 seconds, so that the frequency of the alternating magnetic field is 0.6Hz.

[0062] Performance verification showed that the scale thickness at a downstream distance of 10 meters using the photoelectric-driven alternating magnetic field-based pipe anti-scaling device decreased from 3.4 mm to 0.3 mm (anti-scaling rate of 91.2%), while the scale thickness at a downstream distance of 50 meters using the dual-unit device decreased from 2.8 mm to 1.1 mm (anti-scaling rate of 60.7%). Furthermore, X-ray diffraction analysis confirmed that the interplanar spacing of calcium carbonate in the scale sample increased by 0.16 Å, with a lattice distortion rate of 39%, of which wurtzite CdS contributed 83% to the catalytic activity. The entire process requires no external power supply, resulting in 100% energy savings compared to traditional anti-scaling devices.

[0063] Verification Example 2:

[0064] The pipe has a diameter of 150 mm, the medium contains 18% wax, and the flow rate is 0.8 m / s. It is installed in a four-unit configuration (center-to-center distance 1600±50 mm), with a corrugation angle of 65±3°. The cadmium sulfide catalyst layer consists of wurtzite CdS-doped zinc oxide nanoparticles. The DC resistance of the clockwise coil is 7.8±0.3 ohms, and the DC resistance of the counterclockwise coil is 7.6±0.3 ohms.

[0065] The working process is as follows: the spectral response range is extended to 780 nanometers, and an effective potential of ±0.5V can still be generated under 20,000 lux illumination on a cloudy or rainy day. The frequency of the alternating magnetic field is 0.3Hz, which breaks the average particle size of the wax crystals from 45 micrometers to 15 micrometers.

[0066] Operational data shows that the scale thickness at 500 meters downstream decreased from 2.6 mm to 1.1 mm (thinning rate of 57.7%), and the wax removal cycle was extended from 45 days to 120 days. Computational fluid dynamics simulation confirmed that the turbulence interference rate of the four-unit system was less than or equal to 4%, and the uniformity coefficient of the flow velocity distribution reached 0.93.

[0067] Verification Example 3:

[0068] The sulfur-containing wastewater pipeline (hydrogen sulfide concentration of 80 mg / L, flow rate of 2.2 m / s) adopts a single-unit setup, with a corrugated structure and a corrugated inclination angle of 45 ± 3°. Corrosion resistance design includes: a wurtzite CdS coating as a catalyst layer passing a 500-hour neutral salt spray test (GB / T10125-2021, weight loss rate of 0.8%); and silicon nitride ceramic bearings meeting the G3 corrosion resistance requirements of ISA71.04-2013.

[0069] The operating characteristic is: CdS is generated in a hydrogen sulfide environment. The solid solution has a band gap of 2.40 ± 0.02 eV; the frequency of the alternating magnetic field is 1.2 Hz, which causes the potential oscillation amplitude of the fluid to reach ± ​​35 mV.

[0070] After 6 months of operation, the calcium sulfate content in the scale layer decreased by 76%, the coil resistance drift was less than 0.1 ohms, and the adhesion of the catalyst coating remained at 28 MPa with no peeling.

[0071] Verification Example 4:

[0072] The heavy oil pipeline in the oilfield (viscosity 1200 cP, temperature 80℃, flow velocity 1.2 m / s) adopts a two-unit layout, and the corrugated structure has a corrugated inclination angle of 55±3°. The high-temperature resistance design includes a PMMA window Vicat softening point of 106℃ (GB / T1633-2000) and silicon nitride bearings with an axial clearance of 0.05 mm (ISO5753-1 standard).

[0073] The working process shows that the carrier mobility of wurtzite CdS remains at 175 cm⁻¹ at 80 degrees Celsius. 2 / V·s (Lakeshore 8404 Hall effect tester), only 3.8% lower than room temperature. The corrugated structure outputs a torque of 0.28 N·m in a high-viscosity medium of 1200 cP, meeting the minimum drive requirements. The alternating magnetic field causes the potential of the asphaltene micelle Zeta to oscillate in the range of -15 mV to +20 mV, effectively suppressing deposition.

[0074] Verification Example 5:

[0075] The ultra-low flow rate gathering and transportation pipeline with a diameter of 100 mm (flow velocity of 0.3 m / s, medium temperature of 25℃) adopts a four-unit layout (center distance 800±30 mm), and the corrugated structure has a corrugated inclination angle of 65±3° (surface coated with tungsten carbide anti-wear layer). The diameter of the rotating drum is 100 mm, the thickness of the wurtzite CdS catalyst layer is 0.06 mm (doped with ZnO nanoparticles, doping ratio 1:150), and the light-transmitting window uses anti-fog PMMA (light transmittance greater than or equal to 91%, haze less than 2%).

[0076] The working process is as follows: the corrugated structure outputs a torque of 0.18 N·m at a critical flow velocity of 0.3 m / s, driving the drum to rotate at 5 r / min. Under cloudy weather conditions with an illumination of 5000 lux, the ZnO-doped catalyst layer still excites a potential of ±0.3 V. The alternating magnetic field frequency is 0.1 Hz, causing the Mg in the fluid to... 2+ Ion mobility increased by 22%.

[0077] Performance verification: After 12 months of operation, the scale thickness at a downstream depth of 300 meters decreased from 1.8 mm to 0.7 mm (scale prevention rate of 61.1%). Compared with traditional electromagnetic devices, the scale prevention rate increased by 40% at the same low flow rate.

[0078] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe anti-scaling device based on a photoelectric driven alternating magnetic field, characterized in that, include: A tube body (100) has an opening on its outer periphery; A rotating cylinder (200) is coaxially rotatably disposed inside the tube body (100), and a first photoreaction zone (211) and a second photoreaction zone (221) are respectively disposed on both sides of the outer periphery of the rotating cylinder (200), and the first photoreaction zone (211) and the second photoreaction zone (221) are staggered. The opening of the tube (100) is aligned with the first photoreaction zone (211) and the second photoreaction zone (221); A dual electromagnetic coil (300) is provided with a clockwise coil and a counterclockwise coil. The clockwise coil is embedded in the inner wall of the rotating cylinder (200) corresponding to the first photoreaction zone (211), and the counterclockwise coil is embedded in the inner wall of the rotating cylinder (200) corresponding to the second photoreaction zone (221). The rotating drum (200) includes: The first half-sector (210) has the first photosensitive region (211) disposed on the outer periphery of the first half-sector (210); The second half-sector (220) has the second photosensitive region (221) disposed on the outer periphery of the second half-sector (220); The first half-segment (210) and the second half-segment (220) together form the rotating cylinder (200); The dual electromagnetic coil (300) is provided with a corrugated structure (240), which extends along the axial direction of the rotating drum (200).

2. The pipe anti-scaling device based on photoelectric driven alternating magnetic field according to claim 1, characterized in that, A bearing (230) is fitted on the outer periphery of the rotating drum (200), and the rotating drum (200) is rotatably connected to the inner wall of the tube body (100) through the bearing (230).

3. The pipe anti-scaling device based on photoelectric driven alternating magnetic field according to claim 1, characterized in that, The clockwise coil and the counterclockwise coil are arranged along the axial direction of the rotating drum (200); One side of the clockwise coil is embedded in the inner wall of the first half-sector (210) corresponding to the first photoresponse region (211); One side of the counterclockwise coil is embedded in the inner wall of the second half-sector (220) corresponding to the second photoreaction zone (221).

4. The pipe anti-scaling device based on photoelectric driven alternating magnetic field according to claim 1, characterized in that, The clockwise coil and the counterclockwise coil are arranged alternately; The clockwise coil is embedded on one side of the end near the first photoresponse area (211) on the inner wall of the first half-sector (210) corresponding to the first photoresponse area (211); The counterclockwise coil is embedded on one side of the end near the second photoreaction zone (221) on the inner wall of the second half-sector (220) corresponding to the second photoreaction zone (221).

5. The pipe anti-scaling device based on photoelectric driven alternating magnetic field according to claim 1, characterized in that, The first photoreaction zone (211) and the second photoreaction zone (221) are arranged adjacent to each other along the axial direction of the rotating cylinder (200); The axial distance between the end of the first photoreaction zone (211) away from the second photoreaction zone (221) and the end of the second photoreaction zone (221) away from the first photoreaction zone (211) is less than or equal to the axial length of the opening of the tube body (100).

6. The pipe anti-scaling device based on photoelectric driven alternating magnetic field according to claim 1, characterized in that, The first photoreaction region (211) and the second photoreaction region (221) are coated with a cadmium sulfide catalyst layer; The thickness of the cadmium sulfide catalyst layer is 0.05 mm to 0.1 mm.

7. The pipe anti-scaling device based on photoelectric driven alternating magnetic field according to claim 1, characterized in that, The corrugated structure (240) is detachably disposed within the dual electromagnetic coil (300); The corrugated structure (240) has a corrugation angle of 32 degrees to 68 degrees.

8. The pipe anti-scaling device based on photoelectric driven alternating magnetic field according to claim 1, characterized in that, The central arc angle of the opening of the tube (100) is 95 to 105 degrees.

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