Multi-physical-field aging oil dehydration device and dehydration method

Abstract

The invention relates to a multi-physical-field aged oil dehydration device and method, and belongs to the technical field of petroleum processing. Sufficient demulsification of the aged oil is achieved through the ultrasonic demulsification and dehydration area, a water phase is sufficiently vaporized and evaporated through heating of the low-temperature dehydration area, stubborn emulsified water in the oil is vaporized and separated out through the high-temperature purification standard-reaching area, it can be guaranteed that the moisture content of the aged oil is reduced to 0.5% or below, and crude oil capable of being output is obtained; the hot distillation dehydration technology and the ultrasonic demulsification technology are combined, the technical bottleneck that the aged oil is difficult to demulsify and dehydrate is solved, oil-water separation treatment of the aged oil in the aged oil dehydration device is a physical process, pollution to the environment is avoided, and the requirements of safety and environmental protection are met; meanwhile, no chemical agent is added, so that the effect of low cost is achieved.

Description

Technical Field

[0001] This invention relates to a multi-physical field aging oil dehydration device and dehydration method, belonging to the field of petroleum processing technology. Background Technology

[0002] During oilfield production, aging oil is generated due to mechanical impurities, bacteria, or chemicals during crude oil production and processing. This aging oil accumulates in considerable quantities, especially in wastewater tanks and drying ponds. This aging oil is severely emulsified with water, making it difficult to handle, and it occupies a significant amount of crude oil storage space in wastewater tanks and drying ponds. Therefore, timely recovery and treatment of aging oil is necessary.

[0003] In existing technologies, aged oil recovered from sewage pipe areas and drying ponds is passed into settling tanks or electrostatic dehydrators for dehydration. Settling tanks utilize the difference in density between oil and water to separate oil and water; electrostatic dehydrators, under the action of an electric field, cause water molecules in the aged oil to condense into small droplets, thereby separating them from the crude oil.

[0004] Chinese utility model patent number CN 219194886 U also provides an aged oil dehydration treatment device. This device achieves demulsification and dehydration treatment through high-temperature steam. On the one hand, high-temperature steam does not require explosion-proof treatment, making it safe and reliable. On the other hand, the steam pipeline has a large laying area, increasing the processing capacity of aged oil. Moreover, the aged oil undergoes two demulsification and dehydration treatments, improving the dehydration effect.

[0005] However, existing technologies for dehydrating aged oil are ineffective and cannot effectively treat it. Specifically, using settling tanks to dehydrate aged oil results in high water content and water stratification, often leaving the resulting oil with a water content greater than 0.5%, failing to meet export standards. Furthermore, emulsified components in aged oil can easily trip the electrostatic dehydrator, affecting normal equipment operation and preventing dehydration. Therefore, it is essential to provide an aged oil dehydration device for treating aged oil. Summary of the Invention

[0006] This invention provides a multi-physical field aging oil dehydration device and method, which aims to reduce the water content of aging oil to below 0.5%, and is safe, environmentally friendly, low-cost, and easy to use, making it suitable for large-scale promotion and application.

[0007] The technical solution adopted in this invention is a multi-physical field aging oil dehydration device, including a shell. The inner cavity of the shell is divided into a low-temperature dehydration zone, an ultrasonic demulsification dehydration zone, an overflow discharge zone, and a high-temperature purification zone. The low-temperature dehydration zone, the ultrasonic demulsification dehydration zone, the overflow discharge zone, and the high-temperature purification zone are connected at the top and form a steam collection zone. A second partition is located between the high-temperature purification zone and the overflow discharge zone, and a first partition is located between the low-temperature dehydration zone, the ultrasonic demulsification dehydration zone, and the overflow discharge zone.

[0008] An ultrasonic generator is installed above the ultrasonic demulsification and dehydration zone. Overflow pipe A is used to transport the demulsified aged oil to the low-temperature dehydration zone. A heat-conducting oil pipe A connected to the heat-conducting oil furnace is installed in the low-temperature dehydration zone. A heat-conducting oil pipe B connected to the heat-conducting oil furnace is installed in the high-temperature purification and standardization zone. Overflow pipe B is used to transport the aged oil after the first heat treatment to the high-temperature purification and standardization zone. The shell is provided with an inlet and an outlet connecting the heat-conducting oil pipe B and an inlet and an outlet connecting the heat-conducting oil pipe A. An aged oil inlet is provided at the bottom of the ultrasonic demulsification and dehydration zone, and an aged oil outlet is provided at the bottom of the overflow discharge zone.

[0009] Furthermore, the top of the low-temperature dehydration zone is equipped with a maintenance manhole A, a vent hole, a gas collection bag, and a float level gauge A; the bottom is equipped with a temperature detector A, a drain outlet A, and a glass viewing window A in the middle; and the top of the gas collection bag is equipped with a steam outlet.

[0010] Furthermore, the bottom of the ultrasonic demulsification and dehydration zone is provided with a drain outlet B, a glass viewing window B, and a maintenance manhole B.

[0011] Furthermore, the high-temperature purification zone is equipped with a maintenance manhole C, a pressure gauge, a safety valve, and a float level gauge C at the top, a temperature detector C, a drain outlet C at the bottom, and a glass viewing window C in the middle.

[0012] Furthermore, the ultrasonic demulsification and dehydration zone is also equipped with a float level gauge B.

[0013] Furthermore, the low-temperature dehydration zone and the ultrasonic demulsification dehydration zone are also provided with a second partition, and the second partition and the first partition near the side where the low-temperature dehydration zone is located form an oil collection transition zone.

[0014] Furthermore, a drain outlet D is provided at the bottom of the oil collection transition zone.

[0015] Furthermore, the length of the first partition is greater than that of the second partition.

[0016] Furthermore, the second partition is provided with an overflow port.

[0017] Furthermore, anti-boiling material is laid on both heat-conducting oil pipe A and heat-conducting oil pipe B.

[0018] Furthermore, the anti-boiling material is made of prismatic stone.

[0019] Furthermore, a temperature-controlled electric valve is provided outside the housing to control the opening and closing of the aging oil outlet, and the temperature detector C of the high-temperature purification standard zone is electrically connected to the temperature-controlled electric valve.

[0020] Furthermore, the heat-conducting oil pipe A and the heat-conducting oil pipe B are provided with several guide plates, and adjacent guide plates are arranged alternately at intervals.

[0021] Furthermore, a saddle for supporting the housing is provided at the bottom of the housing.

[0022] This invention also provides a dehydration method using a dehydration device, the specific steps of which are as follows: Aged oil flows into the ultrasonic demulsification and dehydration zone through the aged oil inlet. The cavitation effect of the ultrasonic waves destroys the interfacial tension between the oil and water in the aged oil, allowing the aged oil to be fully demulsified. When the liquid level reaches the height of the overflow pipe A, the demulsified aged oil will flow into the low-temperature dehydration zone. The aged oil flowing into the low-temperature dehydration zone is heated by the heat-conducting oil pipe A to obtain water vapor and the aged oil after the first dehydration. The water vapor accumulates in the steam collection zone. The dehydrated aged oil overflows through the second baffle to the oil collection transition zone. After the aged oil entering the oil collection transition zone reaches a certain liquid level, it flows along the overflow pipe B to the high-temperature purification standard zone. The aged oil flowing into the high-temperature purification standard zone is further heated by the heat-conducting oil pipe B to further vaporize the residual water phase, obtaining water vapor and the heat-treated aged oil. The water vapor is discharged from the steam outlet of the steam collection zone. The dehydrated aged oil overflows through the second baffle to the overflow discharge zone. The aged oil flowing into the overflow discharge zone is discharged from the aged oil outlet.

[0023] Furthermore, in the ultrasonic demulsification and dehydration zone, the ultrasonic wavelength range is 0.01mm to 1mm, and the frequency range is 30kHz to 3MHz.

[0024] Furthermore, the ultrasonic treatment time is 10 to 15 minutes.

[0025] Furthermore, the heating temperature of the heat-conducting oil pipe A in the low-temperature dehydration zone is 105-108°C, and the heating time is 10-15 minutes.

[0026] Furthermore, the heating temperature of the heat-conducting oil pipe B in the high-temperature purification standard zone is 120-128°C, and the heating time is 10-15 minutes.

[0027] This invention discloses a multi-physics field aging oil dehydration device and method. Its advantages include: thorough demulsification of the aging oil is achieved through an ultrasonic demulsification zone; the water phase is fully vaporized and evaporated through heating in a low-temperature dehydration zone; and stubborn emulsified water in the oil is vaporized and separated in a high-temperature purification zone. This ensures that the water content of the aging oil is reduced to below 0.5%, yielding crude oil suitable for export. The combination of thermal distillation dehydration technology and ultrasonic demulsification technology solves the technical bottleneck of difficult demulsification and dehydration of aging oil. The oil-water separation process in this aging oil dehydration device is entirely physical, causing no environmental pollution and meeting safety and environmental protection requirements. Furthermore, it is cost-effective as it does not require the addition of chemical agents. Attached Figure Description

[0028] 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.

[0029] Figure 1 The diagram shown is a schematic of the multi-physics field aging oil dehydration device in Example 1.

[0030] Figure 2 The diagram shown is a top view of the multi-physics field aging oil dehydration device in Example 1.

[0031] Figure 3 As shown Figure 2 Side view of the AA structure.

[0032] The diagram shows: 1. Pressure gauge; 2. Safety valve; 3. Manhole C; 4. Float level gauge C; 5. Float level gauge B; 6. Ultrasonic generator; 7. Float level gauge A; 8. Manhole A; 9. Vent hole; 10. Gas manhole; 11. Steam outlet; 12. Inlet; 13. Outlet; 14. Temperature sensor C; 15. Heat transfer oil pipe B; 17. Drain outlet C; 18. Aging oil outlet; 19. Aging oil inlet; 20. Drain outlet B; 21. Glass viewing window B; 22. Drain outlet D; 23. Drain outlet A ; 24. Temperature sensor A; 25. Heat transfer oil pipe A; 27. Inlet; 28. Outlet; 29. ​​Overflow conduit B; 30. Glass viewing window C; 31. Inspection manhole B; 32. Glass viewing window A; 33. Overflow conduit A; 34. Baffle plate; 101. High-temperature purification compliance zone; 102. Overflow discharge zone; 103. Ultrasonic demulsification and dehydration zone; 104. Oil collection transition zone; 105. Low-temperature dehydration zone; 106. Steam collection zone; 201. Shell; 202. First partition; 203. Second partition; 204. Saddle. Detailed Implementation

[0033] 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, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0034] To further understand the invention, the technical solution will be further described below in conjunction with specific embodiments.

[0035] Example 1: As Figures 1-3 As shown, this embodiment provides a multi-physics field aging oil dehydration device. The inner cavity of the housing 201 is divided into a low-temperature dehydration zone 105, an ultrasonic demulsification dehydration zone 103, an overflow discharge zone 102, and a high-temperature purification zone 101 by a first partition 202 and a second partition 203. This allows for relatively independent treatment of the aging oil in different zones, ensuring effective oil-water separation in each zone. The upper parts of the low-temperature dehydration zone 105, the ultrasonic demulsification dehydration zone 103, the overflow discharge zone 102, and the high-temperature purification zone 101 are interconnected and together form a steam collection zone 106, so that water vapor generated by heating in each zone can be discharged through the steam outlet 11 at the top of the low-temperature dehydration zone 105. Two saddles 204 are provided at the bottom of the housing 201 to support the housing 201 and keep it stable. The length of the first partition 202 is greater than that of the second partition 203.

[0036] An ultrasonic generator 6 is installed above the ultrasonic demulsification and dehydration zone 103. An overflow conduit A33 connects the ultrasonic demulsification and dehydration zone 103 and the low-temperature dehydration zone 105. An overflow conduit B29 connects the low-temperature dehydration zone 105 and the high-temperature purification zone 101. A heat transfer oil pipe A25 connected to a heat transfer oil furnace is installed in the low-temperature dehydration zone 105. A heat transfer oil pipe B15 connected to a heat transfer oil furnace is installed in the high-temperature purification zone 101. The housing 201 has an inlet 12 and an outlet 13 connecting to the heat transfer oil pipe B15, and an inlet 27 and a outlet 28 connecting to the heat transfer oil pipe A25, facilitating the transport of heat transfer oil in the heat transfer oil pipes A25 and B15. An aged oil inlet 19 is provided at the bottom of the ultrasonic demulsification and dehydration zone 103, and an aged oil outlet 18 is provided at the bottom of the overflow discharge zone 102. The low-temperature dehydration zone 105 and the high-temperature purification zone 101 separate oil and water through heating. Specifically, the aged oil is heated by heat exchange through heat-conducting oil pipes A25 and B15. In the ultrasonic demulsification and dehydration zone 103, the ultrasonic wavelength range is 0.01mm to 1mm, the frequency range is 30kHz to 3MHz, and the ultrasonic treatment time is 10 to 15 minutes.

[0037] Both heat transfer oil pipes A25 and B15 are U-shaped heating tube bundles. The U-shaped heating tube bundles increase the heating area, ensuring sufficient heating of the aged oil in the low-temperature dehydration zone 105 and the high-temperature purification zone 101. The heating temperature of heat transfer oil pipes A25 and B15 can be adjusted by regulating their heat exchange area and the flow rate of the heat transfer oil, ensuring that the aged oil in the low-temperature dehydration zone 105 and the high-temperature purification zone 101 reaches and is maintained at a predetermined temperature. The heating temperature of heat transfer oil pipe A25 in the low-temperature dehydration zone 105 is 105–108°C, and the heating time is 10–15 minutes. The heating temperature of heat transfer oil pipe B15 in the high-temperature purification zone 101 is 120–128°C, and the heating time is 10–15 minutes.

[0038] A guide plate 34 is also provided on the straight sections of the heat transfer oil pipes A25 and B15. The guide plate 34 is staggered along both sides of the straight sections of the heat transfer oil pipes A25 and B15. Without affecting the flow of the aging oil, the aging oil flows in a serpentine manner along the gaps between the guide plates 34, so that the heat exchange between the aging oil and the heat transfer oil pipes A25 and B15 is more sufficient and uniform, and the aging oil is heated to the predetermined temperature as soon as possible.

[0039] To promptly monitor the temperature of the aged oil in the low-temperature dehydration zone 105 and the high-temperature purification zone 101, a temperature sensor A24 is installed at the bottom of the low-temperature dehydration zone 105, and a temperature sensor C14 is installed at the bottom of the high-temperature purification zone 101. In this embodiment, temperature sensors A24, B, and C14 are all thermocouples. Figure 1 As shown, multiple temperature sensors A24 are evenly distributed at the bottom of the low-temperature dehydration zone 105 to comprehensively monitor the temperature of the entire zone, ensuring that the aged oil in the zone is heated uniformly. When the temperature detected by temperature sensor A24 exceeds the predetermined range, the temperature of the low-temperature dehydration zone 105 can be adjusted by changing the flow rate of the heat transfer oil, thereby maintaining the temperature of the low-temperature dehydration zone 105 within the predetermined range and ensuring the oil-water separation effect. Similarly, multiple temperature sensors C14 are also evenly distributed at the bottom of the high-temperature purification zone 101 to ensure the dehydration effect of the aged oil in the high-temperature purification zone 101.

[0040] Above the high-temperature purification zone 101 is a pressure gauge 1. The pressure gauge 1 can be used to monitor the pressure changes inside the shell 201, avoid sudden pressure increases that could cause danger, and ensure the safety of the entire device.

[0041] Anti-boiling material is laid on the heat transfer oil pipes A25 and B15 in the low-temperature dehydration zone 105 and the high-temperature purification zone 101. In this embodiment, prismatic stones are used, but other materials such as ceramic fragments can also be used instead. The surface of the prismatic stones is rough and has many edges and corners, which can easily puncture the bubbles. The prismatic stones can increase the heat transfer area and vaporization nucleus, inhibit the growth of bubbles, and make the vaporization of the aged oil-water phase less disturbing to the liquid surface, so as to prevent boiling.

[0042] Since the upper parts of the low-temperature dehydration zone 105, the ultrasonic demulsification dehydration zone 103, the overflow discharge zone 102, and the high-temperature purification zone 101 are interconnected, it is necessary to control the liquid level of the aged oil to prevent the aged oil in one area from flowing into other areas from the top of the first partition 202 and / or the second partition 203. Float level gauges A7, B5, and C4 are respectively installed in the low-temperature dehydration zone 105, the ultrasonic demulsification dehydration zone 103, and the high-temperature purification zone 101. The float level gauges A7, B5, and C4 measure the liquid level of the aged oil in the low-temperature dehydration zone 105, the ultrasonic demulsification dehydration zone 103, and the high-temperature purification zone 101 to ensure that the liquid level of the aged oil is lower than the height of the first partition 202 and / or the second partition 203 in its respective area. When the liquid level in the ultrasonic demulsification and dehydration zone 103 is higher than that in the overflow pipe A33, the aged oil enters the low-temperature dehydration zone 105. When the liquid level of the aged oil in the low-temperature dehydration zone 105 is higher than that in the overflow pipe B29, it enters the high-temperature purification and standardization zone 101. When the liquid level of the treated aged oil in the high-temperature purification and standardization zone 101 is higher than that in the overflow port of the second partition 203, it enters the overflow discharge zone 102.

[0043] In another embodiment of this device, the low-temperature dehydration zone 105 and the ultrasonic demulsification dehydration zone 103 are further provided with a second partition 203. The second partition 203 and the first partition 202 near the side where the low-temperature dehydration zone 105 is located form an oil collection transition zone 104. The oil collection transition zone 104 is interconnected with the upper part of the low-temperature dehydration zone 105, the ultrasonic demulsification dehydration zone 103, the overflow discharge zone 102, and the high-temperature purification compliance zone 101, and together they form a steam collection zone 106. The bottom of the oil collection transition zone 104 is provided with a drain outlet D22. At this point, overflow conduit A33 connects the ultrasonic demulsification and dehydration zone 103 and the low-temperature dehydration zone 105, and overflow conduit B29 connects the oil collection transition zone 104 and the high-temperature purification standard zone 101. When the level of the aged oil in the low-temperature dehydration zone 105 is higher than the overflow port of the second partition 203, it flows into the oil collection transition zone 104. When the level of the aged oil in the oil collection transition zone 104 is higher than the overflow conduit B29, it enters the high-temperature purification standard zone 101. When the level of the treated aged oil in the high-temperature purification standard zone 101 is higher than the overflow port of the second partition 203, it enters the overflow discharge zone 102. The purpose of setting up the oil collection transition zone 104 is to ensure that the aged oil after low-temperature dehydration is pure and collected in an independent area.

[0044] The overflow conduit A33 and overflow conduit B29 are located on the central axis of the housing 201.

[0045] Discharging aged oil through the aged oil outlet 18 allows for timely adjustment of the liquid level in the low-temperature dehydration zone 105 and the high-temperature purification zone 101, preventing the aged oil from being too high and accidentally entering other areas, which would disrupt the aged oil dehydration process and hinder its progress.

[0046] Furthermore, the housing 201 is also provided with glass viewing windows A32, B21 and C30 to facilitate operators to observe the liquid level of the aged oil in the housing 201 and make timely adjustments.

[0047] An overflow port is provided on the second partition 203 between the high-temperature purification standard zone 101 and the overflow discharge zone 102. The overflow port should be located in the middle or upper middle part of the second partition 203 so that the high-quality purified oil in the upper layer of the high-temperature purification standard zone 101 flows into the overflow discharge zone 102, thereby improving the quality of the purified oil.

[0048] The top of the high-temperature purification zone 101 is also equipped with a safety valve 2 to deal with emergencies encountered by the shell 201. For example, if boiling occurs due to excessive water content in the aged oil, the instantaneous steam pressure inside the shell 201 will be too high, causing a tower surge, which will threaten the safe and stable operation of the equipment. In this case, the safety valve 2 needs to be used to release pressure in time. The low-temperature dehydration zone 105 is equipped with a vent hole 9, which can be used to connect a vent pipeline and a purging device. During equipment maintenance, the purging device can be used to discharge any combustible gases that may remain in the shell 201; during equipment operation, the purging device can also be used to accelerate steam flow and discharge it from the steam outlet 11 in a timely manner, thereby improving the dehydration efficiency of the aged oil.

[0049] The housing 201 is also equipped with manholes A8, B31, and C3 at different locations, facilitating access for operators to maintain and repair the aging oil dehydration device. A gas collection chamber 10 is located at the top of the low-temperature dehydration zone 105, with a steam outlet 11 at its top. The housing 201 is also equipped with drain ports A23, B20, C17, and D22 at different locations. A temperature-controlled electric valve is located outside the housing 201 to control the opening and closing of the aging oil outlet 18. A temperature sensor C14 in the high-temperature purification zone 101 is electrically connected to the temperature-controlled electric valve, transmitting a temperature signal to the valve and controlling its opening and closing to facilitate oil discharge.

[0050] This embodiment also provides a dehydration method using a dehydration device. Aged oil flows into the ultrasonic demulsification and dehydration zone 103 through the aged oil inlet 19. The cavitation effect of the ultrasound breaks down the interfacial tension between the oil and water in the aged oil, allowing for complete demulsification. When the liquid level reaches the height of the overflow pipe A, the demulsified aged oil flows into the low-temperature dehydration zone 105. The aged oil flowing into the low-temperature dehydration zone 105 is heated through the heat-conducting oil pipe A25, resulting in water vapor and the first dehydrated aged oil. The water vapor accumulates in the steam collection zone 106, and the dehydrated aged oil overflows through the second baffle 203. Oil collection transition zone 104; after the aged oil entering the oil collection transition zone 104 reaches a certain liquid level, it will flow along the overflow pipe B to the high temperature purification standard zone 101. The aged oil flowing into the high temperature purification standard zone 101 will be heated by the heat-conducting oil pipe B15 to further vaporize the residual water phase, resulting in water vapor and heat-treated aged oil. The water vapor will be discharged from the steam outlet 11 of the steam collection zone 106. After dehydration, the aged oil will overflow through the second baffle 203 to the overflow discharge zone 102. The aged oil flowing into the overflow discharge zone 102 will be discharged from the aged oil outlet 18.

[0051] The ultrasonic wavelength range in the ultrasonic demulsification and dehydration zone 103 is 0.01mm to 1mm, the frequency range is 30kHz to 3MHz, and the ultrasonic treatment time is 10 to 15 minutes. In the low-temperature dehydration zone 105, the heating temperature of the heat-conducting oil pipe A25 is 105 to 108℃, and the heating time is 10 to 15 minutes. In the high-temperature purification and standard-reaching zone 101, the heating temperature of the heat-conducting oil pipe B15 is 120 to 128℃, and the heating time is 10 to 15 minutes. According to experimental data, when the temperature range for aging oil treatment is 120 to 128℃, the water content of the aging oil after heat treatment is 0.5% to 0.05%. Therefore, the water content of the aging oil after treatment in this high-temperature standard-reaching zone will definitely meet the requirements.

[0052] This invention provides an aged oil dehydration device and method. The housing 201 is divided by a first partition 202 and a second partition 203 into an upper, sequentially connected low-temperature dehydration zone 105, an oil collection transition zone 104, an overflow discharge zone 102, an ultrasonic demulsification dehydration zone 103, a high-temperature purification zone 101, and an upper steam collection zone 106. The ultrasonic demulsification dehydration zone 103 achieves thorough demulsification of the aged oil; the low-temperature dehydration zone 105, through a first heating process, fully vaporizes and evaporates the water phase; and the high-temperature purification zone 101, through a second heating process, vaporizes and separates the stubborn emulsion water in the oil. Ultrasonic demulsification makes it easier for the water phase to separate from the oil phase. The first heating in the low-temperature dehydration zone 105 reduces the water content of the aged oil from 20%–50% to 5%–15%, and the second heating in the high-temperature purification zone 101 reduces the water content of the aged oil to below 0.5%, resulting in crude oil that can be exported. Therefore, the aging oil dehydration device provided in this embodiment of the invention can reduce the water content of aging oil to below 0.5%, and is safe, environmentally friendly, low-cost, and easy to use, making it suitable for large-scale promotion and application.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-physics field aging oil dehydration device, characterized in that, Includes a housing (201), the inner cavity of which is sequentially divided into a low-temperature dehydration zone (105), an ultrasonic demulsification and dehydration zone (103), an overflow discharge zone (102), and a high-temperature purification zone (101); the low-temperature dehydration zone (105), the ultrasonic demulsification and dehydration zone (103), the overflow discharge zone (102), and the high-temperature purification zone (101) are connected at the top and constitute a steam collection zone (106).

2. The multi-physics field aging oil dehydration device according to claim 1, characterized in that, A second partition (203) is provided between the high-temperature purification standard zone (101) and the overflow discharge zone (102), and a first partition (202) is provided between the low-temperature dehydration zone (105) and the ultrasonic demulsification and dehydration zone (103) and between the ultrasonic demulsification and dehydration zone (103) and the overflow discharge zone (102).

3. The multi-physics field aging oil dehydration device according to claim 2, characterized in that, An ultrasonic generator (6) is installed above the ultrasonic demulsification and dehydration zone (103). An overflow conduit A (33) is used to transport the demulsified aged oil to the low-temperature dehydration zone (105). A heat-conducting oil pipe A (25) is installed in the low-temperature dehydration zone (105). A heat-conducting oil pipe B (15) is installed in the high-temperature purification zone (101). An overflow conduit B (29) is used to transport the aged oil after the first heat treatment to the high-temperature purification zone (101). The shell (201) is provided with an inlet (12) and an outlet (13) connecting the heat-conducting oil pipe B (15) and an inlet (27) and an outlet (28) connecting the heat-conducting oil pipe A (25). An aged oil inlet (19) is provided at the bottom of the ultrasonic demulsification and dehydration zone (103), and an aged oil outlet (18) is provided at the bottom of the overflow discharge zone (102).

4. The multi-physics field aging oil dehydration device according to claim 1, characterized in that, The low-temperature dehydration zone (105) is equipped with a maintenance manhole A (8), a vent hole (9), a gas collection bag (10) and a float level gauge A (7) at the top, a temperature detector A (24) and a drain outlet A (23) at the bottom, and a glass viewing window A (32) in the middle. The gas collection bag (10) is equipped with a steam outlet (11) at the top.

5. The multi-physics field aging oil dehydration device according to claim 1, characterized in that, The bottom of the ultrasonic demulsification and dehydration zone (103) is provided with a drain outlet B (20), a glass viewing window B (21), and a maintenance manhole B (31).

6. The multi-physics field aging oil dehydration device according to claim 1, characterized in that, The high-temperature purification standard zone (101) is equipped with a maintenance manhole C (3), pressure gauge (1), safety valve (2) and float level gauge C (4) at the top, a temperature detector C (14) and a drain outlet C (17) at the bottom, and a glass viewing window C (30) in the middle.

7. The multi-physics field aging oil dehydration device according to claim 1, characterized in that, The ultrasonic demulsification and dehydration zone (103) is equipped with a float level gauge B (5).

8. The multi-physics field aging oil dehydration device according to claim 2, characterized in that, The length of the first partition (202) and the length of the second partition (203) are greater than the height of the overflow conduit A (33) and the overflow conduit B (29) inside the shell (201).

9. The multi-physics field aging oil dehydration device according to claim 8, characterized in that, The length of the first partition (202) is greater than that of the second partition (203).

10. A multi-physics field aging oil dehydration device according to any one of claims 2 or 8, characterized in that, The low-temperature dehydration zone (105) and the ultrasonic demulsification dehydration zone (103) are also provided with a second partition (203), and the second partition (203) and the first partition (202) near the low-temperature dehydration zone (105) form an oil collection transition zone (104).

11. The multi-physics field aging oil dehydration device according to claim 10, characterized in that, The bottom of the oil collection transition zone (104) is provided with a drain outlet D (22).

12. The multi-physics field aging oil dehydration device according to claim 8, characterized in that, The second partition (203) is provided with an overflow port.

13. The multi-physics field aging oil dehydration device according to claim 1, characterized in that, Anti-boiling material was laid on both heat transfer oil pipe A (25) and heat transfer oil pipe B (15).

14. The multi-physics field aging oil dehydration device according to claim 13, characterized in that, The anti-boiling material is made of angular stone.

15. The multi-physics field aging oil dehydration device according to claim 6, characterized in that, The housing (201) is equipped with a temperature-controlled electric valve that controls the opening and closing of the aging oil outlet (18). The temperature sensor C (14) of the high-temperature purification standard zone (101) is electrically connected to the temperature-controlled electric valve.

16. The multi-physics field aging oil dehydration device according to claim 3, characterized in that, Several guide plates (34) are provided on heat transfer oil pipe A (25) and heat transfer oil pipe B (15), and adjacent guide plates (34) are arranged alternately.

17. The multi-physics field aging oil dehydration device according to claim 1, characterized in that, The bottom of the housing (201) is provided with a saddle (204) for supporting the housing (201).

18. A multi-physics field dehydration method for aged oil, characterized in that, The aged oil flows into the ultrasonic demulsification and dehydration zone (103) through the aged oil inlet (19). The cavitation effect of the ultrasound breaks the interfacial tension between the oil and water in the aged oil, allowing the aged oil to be fully demulsified. When the liquid level reaches the height of the overflow pipe A, the aged oil after demulsification will flow into the low-temperature dehydration zone (105). The aged oil flowing into the low-temperature dehydration zone (105) is heated by the heat-conducting oil pipe A (25) to obtain water vapor and the aged oil after the first dehydration. The water vapor accumulates in the steam collection zone (106). The dehydrated aged oil overflows into the oil collection transition zone (104) through the second baffle (203). After the aged oil in zone (104) reaches a certain liquid level, it will flow along the overflow pipe B to the high temperature purification standard zone (101). The aged oil flowing into the high temperature purification standard zone (101) will continue to be heated by the heat-conducting oil pipe B (15) to further vaporize the residual water phase, and obtain water vapor and the heated aged oil. The water vapor will be discharged from the steam outlet (13)(11) of the steam collection zone (106). After dehydration, the aged oil will overflow to the overflow discharge zone (102) through the second partition (203). The aged oil flowing to the overflow discharge zone (102) will be discharged from the aged oil outlet (18).

19. A method for electrically controlled salvage according to claim 18, characterized in that, In the ultrasonic demulsification and dehydration zone (103), the ultrasonic wavelength range is 0.01mm to 1mm, the frequency range is 30kHz to 3MHz, and the ultrasonic treatment time is 10 to 15min.

20. The electrically controlled salvage method according to claim 18, characterized in that, The heating temperature of the heat-conducting oil pipe A (25) in the low-temperature dehydration zone (105) is 105-108℃, and the heating time is 10-15min.

21. The electrically controlled salvage method according to claim 18, characterized in that, The heating temperature of the heat-conducting oil pipe B (15) in the high-temperature purification standard zone (101) is 120-128℃, and the heating time is 10-15min.

Images