High-voltage electric field crude oil modification experimental equipment
By designing high-voltage electric field crude oil modification experimental equipment, using adjustable high-voltage electric field strength and sealing design, the problem of poor modification effect of high-waxed crude oil is solved, and low-energy consumption and efficient crude oil modification and viscosity detection are achieved.
Patent Information
- Application Number
- CN202420935910.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing degreasing agent modification technology has poor effect on high-waxed crude oil modification, resulting in the need to adopt high-energy-consuming heating and transportation technology. The international industry and academia are seeking more economical and efficient crude oil modification technology.
A high-voltage electric field crude oil modification experimental equipment is designed, including experimental tanks and poles. The sealing caps and partition plates are installed inside and outside the experimental tank to ensure crude oil sealing, and the poles are controlled by adjustable high-voltage electric field strength and power supply. Distance from the tank wall to avoid arcing and achieve safe and efficient crude oil modification.
The equipment can significantly reduce the viscosity and yield stress of crude oil, with energy consumption only 1% of heating energy consumption, and improve experimental stability and efficiency through sealing design, achieving rapid detection of modified crude oil viscosity.
Smart Images
Figure CN222305762U_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of crude oil modification experiments, and specifically relates to a high voltage electric field crude oil modification experimental equipment. Background Art
[0002] Improving the fluidity of crude oil by physical or chemical methods (i.e., crude oil modification) is a fundamental way to reduce the energy consumption of crude oil transportation and improve transportation safety. Pour point depressant modification is the most widely used waxy crude oil modification technology in engineering applications. However, this technology still has certain limitations. For example, the modification effect of highly waxy crude oil is not good. Therefore, some pipelines still need to use more energy-consuming heating transportation technology. For this reason, the international industry and academia have been seeking more economical and efficient crude oil modification technologies, including innovative technologies based on new technology principles.
[0003] Electric field modification is an emerging crude oil modification method, and its technical principle is the negative electrorheological effect of waxy oil. Simply put, electric field modification is to apply a high-voltage electric field of a certain intensity (intensity 0.2~5kV / mm) to crude oil for a few seconds, which can produce the effect of reducing viscosity and yield stress. For some waxy crude oils, the viscosity near the pour point can be reduced by more than 80%, and the yield stress reduction rate can reach 90%, while its energy consumption is only 1% of the heating energy consumption when the same viscosity reduction rate is achieved.
[0004] Therefore, this paper systematically summarizes the research progress in crude oil electric field treatment methods and devices, electric field modification effects and their main influencing factors, electric field modification mechanisms, etc., and points out the existing problems and subsequent research directions.
[0005] Therefore, a set of convenient and fast crude oil electric field modification experimental equipment is needed, which can ensure that the crude oil inside the experimental equipment is sufficiently sealed and can also achieve the stability of the experiment. Utility Model Content
[0006] In order to solve the above problems, this paper proposes a high-voltage electric field crude oil modification experimental equipment. The experimental device includes an experimental tank and a pole. The inner side of the experimental tank is provided with a pole, and the outer side of the experimental tank is provided with an oil port and a ground wire connector. The outer side of the bottom end of the experimental tank is provided with a bottom sealing cap, and the outer side of the top end of the experimental tank is provided with a top plug-in cap. The top plug-in cap is a cylindrical chamber cap, and the inner side of the bottom end of the top plug-in cap is provided with a crude oil cavity, and the inner side of the top end of the top plug-in cap is provided with a transformer oil cavity. A partition plate is provided between the crude oil cavity and the transformer oil cavity, and a pole is provided through the center of the partition plate. The outer side of the upper end of the pole is connected to the seal through the partition plate through a thread and a sealing nut. The top of the pole is arranged in the transformer oil cavity, and the outer surface of the pole is connected to the experimental tank. The distance between the inner walls is adjustable according to the electric field strength required for the experiment and the maximum voltage of the experimental power supply. The outer sides of the upper and lower ends of the experimental tank are sealed and connected to the bottom sealing cap and the top plug-in cap by sealing threads and sealing rubber ring step limiters. By arranging sealing caps at the upper and lower ends of the experimental device, it is ensured that the experimental crude oil inside the experimental tank has sufficient sealing. At the same time, the top plug-in cap at the top can also be used to plug and fix the pole, which is easy to install. A transformer oil cavity is also provided at the top of the pole, so as to ensure that the high-voltage current will not generate an arc due to air when it is introduced into the pole, thereby ensuring the safety of the experimental device. The experimental device can not only control the experimental variables according to the voltage, but also control the distance between the pole and the inner wall of the experimental tank to achieve the variable of the spacing.
[0007] The experimental tank is in the shape of a cylindrical straight-through cylinder, with an oil port provided on the outer side of the experimental tank in a conductive manner, a ground wire joint provided horizontally and vertically on the outer side of the lower part of the experimental tank, and sealing threads provided on the outer sides of the upper and lower ends of the experimental tank, the oil port includes an oil inlet and an oil outlet, the oil inlet is provided on the outer side of the upper part of the experimental tank, the oil outlet is provided on the outer side of the upper part of the experimental tank, the outer ends of the oil inlet and the oil outlet are provided with oil port sealing covers, the oil inlet is connected to the crude oil pump, and the oil outlet is connected to the viscosity detection tank, the straight-through experimental tank can facilitate the entry and exit of crude oil, and can also facilitate the installation of caps at the upper and lower ends, and the oil inlet is directly connected to the crude oil pump, so that the experimental device can easily control the internal crude oil reaction time through the crude oil pump, and the oil outlet is directly connected to the viscosity detection tank, which can conveniently and quickly detect the viscosity of the modified crude oil directly, thereby improving the experimental efficiency.
[0008] The top plug-in cap and the bottom sealing cap are both cylindrical cavities, and the materials of the top plug-in cap and the bottom sealing cap are both polytetrafluoroethylene materials. The top plug-in cap and the bottom sealing cap are both provided with crude oil cavities, and the shapes of the crude oil cavities are both inward-retracted right-angled single-step cavities. A sealing rubber ring is provided at the step end face of the crude oil cavity. A sealing thread is provided on the inner large-diameter arc surface of the crude oil cavity. The height of the inner large diameter of the crude oil cavity is half the height of the inner small diameter. By providing the crude oil cavity with an inner sealing thread and a sealing step on the top plug-in cap and the bottom sealing cap, it is ensured that the crude oil inside the experimental tank will not penetrate and leak, and the overall sealing is ensured, thereby further improving the overall stability of the experimental device.
[0009] The outer side of the top end of the top plug-in cap is connected to the top cover through a sealing thread. The top cover is in the shape of a circular disc cover. A sealing rubber ring is provided at the inner end of the top cover. A cable hole is provided in the center of the top cover. A cable is passed through the inner side of the cable hole. The cable is connected to the top end of the pole. By providing a top cover at the top end of the top plug-in cap, it is ensured that the transformer oil inside the transformer oil chamber at the top end of the top plug-in cap will not leak, thereby ensuring the balance and stability of the hydraulic oil. In addition, the cable hole provided in the middle of the top cover can also conveniently connect the high-voltage cable to the pole.
[0010] The pole is in the shape of a cylindrical straight rod, and a connecting thread is provided on the outer side of the upper end of the pole, and the connecting thread of the pole passes through the center of the partition plate of the top plug-in cap. A sealing nut is provided on the outer side of the upper end of the pole, and the sealing nut is arranged on the upper side of the partition plate. A threaded hole is provided in the center of the partition plate. The pole is connected to the high-voltage adjustable transformer through a cable. The electric field strength between the electrode rod in the tank and the experimental tank is adjustable at 800-1300v / mm. By arranging a connecting thread at the upper end of the pole, the pole can be conveniently fixed vertically under the top plug-in cap, which can achieve a certain isolation and sealing effect. The sealing nut at the upper end of the pole further isolates the transformer oil and the crude oil, ensuring the isolation of the oil in the two zones, and the exposed thread at the upper end of the pole can also be conveniently connected to the cable, ensuring the convenience of cable connection.
[0011] Beneficial effects:
[0012] Sealing caps are provided at both ends of the experimental device to ensure that the experimental crude oil inside the experimental tank has sufficient sealing. At the same time, the top plug-in cap can also be used to plug in and fix the pole, which is easy to install. A transformer oil chamber is also provided at the top of the pole to ensure that no arc will be generated due to air when the high-voltage current is introduced into the pole, thereby ensuring the safety of the experimental device. The experimental device can not only control the experimental variables according to the voltage, but also control the distance between the pole and the inner wall of the experimental tank to achieve the spacing variable.
[0013] The straight-through experimental tank can easily allow crude oil to enter and exit, and it is also convenient for the installation of the caps at the upper and lower ends. The oil inlet is directly connected to the crude oil pump, which allows the experimental device to easily control the internal crude oil reaction time through the crude oil pump. The oil outlet is directly connected to the viscosity detection tank, which can conveniently and quickly detect the viscosity of the modified crude oil and improve the experimental efficiency.
[0014] By providing a crude oil cavity with an inner sealing thread and a sealing step on both the top plug cap and the bottom sealing cap, it is ensured that the crude oil inside the experimental tank will not leak, and the overall sealing is ensured, thereby further improving the overall stability of the experimental device.
[0015] By setting a top cover on the top of the top plug-in cap, it is ensured that the transformer oil inside the transformer oil chamber at the top of the top plug-in cap will not leak, thereby ensuring the balance and stability of the hydraulic oil inside. In addition, the cable hole set in the middle of the top cover can also conveniently connect the high-voltage cable to the pole.
[0016] By setting a connecting thread at the upper end of the pole, the pole can be conveniently fixed vertically under the top plug-in cap, which can achieve a certain isolation and sealing effect. The sealing nut at the upper end of the pole further isolates the transformer oil and the crude oil, ensuring the isolation of the oil in the two zones. The exposed thread at the upper end of the pole can also conveniently connect the cable, ensuring the convenience of cable connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a front cross-sectional view of a high voltage electric field crude oil modification experimental device;
[0018] Figure 2 It is a partial enlarged view of the upper end of a high-voltage electric field crude oil modification experimental device;
[0019] Figure 3 It is a partial enlarged view of the lower end of a high-voltage electric field crude oil modification experimental device;
[0020] In the figure; 1, experimental tank, 2, bottom sealing cap, 3, top plug cap, 4, top cover, 5, pole, 6, oil inlet, 7, oil outlet, 8, ground wire connector, 9, oil port sealing cover, 10, sealing thread, 11, sealing nut, 12, sealing rubber ring. DETAILED DESCRIPTION
[0021] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.
[0022] Experimental tank 1, bottom sealing cap 2, top plug-in cap 3, top cover 4, pole 5, oil inlet 6, oil outlet 7, ground wire connector 8, oil port sealing cover 9, sealing thread 10, sealing nut 11, sealing rubber ring 12.
[0023] like Figure 1 , 2 , as shown in 3;
[0024] A high-voltage electric field crude oil modification experimental device, the experimental device includes an experimental tank 1 and a pole 5, the inner side of the experimental tank 1 is provided with the pole 5, the outer side of the experimental tank 1 is provided with an oil port and a ground wire connector 8, the outer side of the bottom end of the experimental tank 1 is provided with a bottom sealing cap 2, the outer side of the top end of the experimental tank 1 is provided with a top plug-in cap 3, the top plug-in cap 3 is a cylindrical chamber cap, the bottom inner side of the top plug-in cap 3 is provided with a crude oil cavity, the top inner side of the top plug-in cap 3 is provided with a transformer oil cavity, a partition plate is provided between the crude oil cavity and the transformer oil cavity, the center of the partition plate is provided with a pole 5, the upper outer side of the pole 5 is connected to the seal penetrating the partition plate through a thread and a sealing nut 11, the top of the pole 5 is provided with In the transformer oil chamber, the distance between the outer surface of the pole 5 and the inner wall of the experimental tank is adjustable according to the electric field strength required for the experiment and the maximum voltage of the experimental power supply. The outer sides of the upper and lower ends of the experimental tank 1 are sealed and connected with the bottom sealing cap 2 and the top plug-in cap 3 by sealing threads 10 and sealing rubber rings 12 in a step-limiting manner. The shape of the experimental tank 1 is a cylindrical straight-through cylinder. The outer side of the experimental tank 1 is conductively provided with an oil port. The lower outer side of the experimental tank 1 is horizontally and vertically provided with a ground wire connector 8. The outer sides of the upper and lower ends of the experimental tank 1 are provided with sealing threads 10. The oil port includes an oil inlet 6 and an oil outlet 7. The oil inlet 6 is arranged on the outer side of the upper part of the experimental tank 1, and the oil outlet 7 is arranged on the outer side of the experimental tank 1. On the outer side of the upper part of the tank 1, the outer ends of the oil inlet 6 and the oil outlet 7 are both provided with oil port sealing covers 9, the top plug-in cap 3 and the bottom sealing cap 2 are both cylindrical cavities, the materials of the top plug-in cap 3 and the bottom sealing cap 2 are both polytetrafluoroethylene materials, and the insides of the top plug-in cap 3 and the bottom sealing cap 2 are both provided with crude oil cavities, and the shapes of the crude oil cavities are both inward-retracted right-angled single-step cavities, and a sealing rubber ring 12 is provided at the step end face of the crude oil cavity, and a sealing thread 10 is provided on the inner large-diameter arc surface of the crude oil cavity, and the height of the inner large-diameter of the crude oil cavity is half of the height of the inner small-diameter, and the top outer side of the top plug-in cap 3 is connected to the top cover 4 through the sealing thread 10, and the top cover 4 is shaped like a circular disc cover, and the inner end of the top cover 4 is provided There is a sealing rubber ring 12, and a cable hole is provided in the center of the top cover 4. A cable is passed through the inner side of the cable hole. The cable is connected to the top of the pole 5. The pole 5 is in the shape of a cylindrical straight rod. A connecting thread is provided on the outer side of the upper end of the pole 5. The connecting thread of the pole 5 passes through the center of the partition plate of the top plug-in cap 3. A sealing nut 11 is provided on the outer side of the upper end of the pole 5. The sealing nut 11 is arranged on the upper side of the partition plate. A threaded hole is provided in the center of the partition plate. The oil inlet 6 is connected to the crude oil pump, and the oil outlet 7 is connected to the viscosity detection tank. The pole 5 is connected to the high-voltage adjustable transformer through a cable. The electric field strength between the electrode rod in the tank and the experimental tank is adjustable 800-1300v / mm.
[0025] Implementation examples;
[0026] Before use, according to the voltage to be tested in the experiment, select poles 5 of different diameters, install the bottom of the top plug-in cap 3 and use the sealing nut 11 to seal and separate the transformer oil chamber and the crude oil chamber of the top plug-in cap 3, and then install the top plug-in cap 3 with the pole 5 on the top of the experimental tank 1 through the sealing thread 10, and install the bottom sealing cap 2 on the bottom of the experimental tank 1 through the sealing thread 10, and then connect the crude oil pump to the oil inlet 6, the viscosity detection tank to the oil outlet 7, and connect the pole 5 to the high-voltage transformer through a cable. After the pole 5 is connected, finally fill it with transformer oil to complete the preparations before the experiment.
[0027] When in use, first fill the inside of the test tank 1 with crude oil through the crude oil pump, while the oil outlet 7 remains sealed, start the high-voltage transformer, adjust the voltage and reaction time according to the distance between the pole 5 and the inner wall of the test tank 1 to perform a voltage regulation experiment, and after a voltage reaction is completed, open the oil outlet 7 to pour the modified crude oil into the viscosity test tank to test the viscosity of the modified crude oil.
[0028] Then repeat the above steps to adjust the diameter of the pole 5, the voltage intensity and the reaction time to experimentally obtain the best electrode modification data.
[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A high-voltage electric field crude oil modification experimental device, the experimental device includes an experimental tank and a pole, the inner side of the experimental tank is provided with a pole, and the outer side of the experimental tank is provided with an oil port and a ground wire connector, characterized in that: A bottom sealing cap is provided on the outer side of the bottom end of the experimental tank, and a top plug-in cap is provided on the outer side of the top end of the experimental tank. The top plug-in cap is a cylindrical chamber cap, and a crude oil chamber is provided on the inner side of the bottom end of the top plug-in cap, and a transformer oil chamber is provided on the inner side of the top end of the top plug-in cap. A partition plate is provided between the crude oil chamber and the transformer oil chamber, and a pole is provided through the center of the partition plate. The outer side of the upper end of the pole is connected to the seal passing through the partition plate through a thread and a sealing nut, and the top end of the pole is arranged in the transformer oil chamber, and the distance between the outer surface of the pole and the inner wall of the experimental tank is adjustable according to the electric field strength required for the experiment and the maximum voltage of the experimental power supply. The outer sides of the upper and lower ends of the experimental tank are sealed and connected to the bottom sealing cap and the top plug-in cap through sealing threads and sealing rubber ring step limiters.
2. The high voltage electric field crude oil modification experimental equipment according to claim 1 is characterized in that: The experimental tank is in the shape of a cylindrical straight-through cylinder, an oil port is provided on the outer side of the experimental tank in a conductive manner, a ground wire joint is provided horizontally and vertically on the outer side of the lower part of the experimental tank, and sealing threads are provided on the outer sides of the upper and lower ends of the experimental tank. The oil port includes an oil inlet and an oil outlet, the oil inlet is provided on the outer side of the upper part of the experimental tank, and the oil outlet is provided on the outer side of the upper part of the experimental tank, and the outer ends of the oil inlet and the oil outlet are provided with oil port sealing covers.
3. The high voltage electric field crude oil modification experimental equipment according to claim 1 is characterized in that: The top plug cap and the bottom sealing cap are both cylindrical cavities, and the materials of the top plug cap and the bottom sealing cap are both polytetrafluoroethylene materials. The top plug cap and the bottom sealing cap are both provided with crude oil cavities inside. The shape of the crude oil cavities is an inward-retracted right-angle single-step cavity. A sealing rubber ring is provided at the step end face of the crude oil cavity. A sealing thread is provided on the inner large-diameter arc surface of the crude oil cavity. The height of the inner large diameter of the crude oil cavity is half the height of the inner small diameter.
4. The high voltage electric field crude oil modification experimental equipment according to claim 1 is characterized in that: The outer side of the top end of the top plug cap is connected to the top cover through a sealing thread. The top cover is in the shape of a circular disc cover. A sealing rubber ring is provided at the inner end of the top cover. A cable hole is provided at the center of the top cover. A cable passes through the inner side of the cable hole. The cable is connected to the top end of the pole.
5. The high voltage electric field crude oil modification experimental equipment according to claim 1 is characterized in that: The pole is in the shape of a cylindrical straight rod, with a connecting thread on the outer side of the upper end of the pole, which passes through the center of the partition plate of the top plug-in cap, and a sealing nut on the outer side of the upper end of the pole, which is arranged on the upper side of the partition plate, and a threaded hole is provided in the center of the partition plate.
6. The high voltage electric field crude oil modification experimental equipment according to claim 2 is characterized in that: The oil inlet is connected to the crude oil pump, and the oil outlet is connected to the viscosity detection tank.
7. The high voltage electric field crude oil modification experimental equipment according to claim 4 is characterized in that: The pole is connected to a high-voltage adjustable transformer through a cable, and the electric field strength between the electrode rod in the tank and the experimental tank is adjustable at 800-1300v / mm.