A lubricating oil dewatering vapor treatment device

Abstract

The utility model discloses a kind of lubricating oil dehydration vapor treatment devices, including vacuum degassing tank, dehydration vapor component, vacuum acquisition system, circulating pipeline system, first and second vacuum monitoring member and control system, dehydration vapor component is located in the upper portion of vacuum degassing tank, including overflow tray and filler layer, for evenly distributing oil and increasing its and vacuum contact area, vacuum acquisition system connects gas phase space to establish and maintain vacuum, circulating pipeline system includes oil pump and heater, push oil circulation flow and heat, double vacuum monitoring member respectively monitors system suction end and tank vacuum degree, control system judges dehydration end point according to its signal;The utility model realizes the efficient, uniform dehydration treatment of lubricating oil under vacuum environment by integrated design and collaborative control, effectively avoids oil product local overheating deterioration, improves dehydration automation degree and reliability, solves the contradiction between efficient dehydration and oil product security.

Description

Technical Field

[0001] This utility model relates to the field of helium compressor technology, specifically to a lubricating oil dehydration and vaporization treatment device. Background Technology

[0002] Helium compressors are critical equipment in cutting-edge fields such as superconductivity, cryogenic physics, aerospace, and military applications, and their operational reliability is paramount. When a helium compressor shuts down, ambient moisture mixes with the lubricating oil and enters the cryogenic zone of the helium refrigerator through the pipelines, where it freezes, causing system blockage and ultimately resulting in a complete system shutdown. Therefore, deep dehydration treatment of the helium compressor lubricating oil to reduce its water content to extremely low levels (e.g., ≤50ppm) is essential to ensure stable system operation.

[0003] Currently, the industry employs various technical approaches for dehydrating lubricating oils, including static heating, mechanical stirring, adsorption filtration, and vacuum dehydration. However, while pursuing high dehydration efficiency and depth, these existing technologies often fail to adequately address the quality and safety of the lubricating oil.

[0004] Specifically, methods relying on heating are prone to uneven heating, leading to localized overheating of the lubricating oil and causing deterioration phenomena such as oxidation and cracking. Methods relying on mechanical disturbance (such as stirring and atomization) can improve efficiency but inevitably carry the risks of shear emulsification and oil oxidation. While adsorption filtration avoids high temperatures, it has the problems of frequent replacement of adsorbents when they become saturated, high maintenance costs, and the potential for becoming a secondary source of pollution after saturation.

[0005] In summary, existing technologies have long faced a fundamental technical contradiction: how to ensure that the lubricating oil itself does not suffer thermal degradation or chemical damage while achieving efficient and deep dehydration. This contradiction constitutes a technical bottleneck that urgently needs to be solved in this field. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides a lubricating oil dehydration and vapor treatment device, which aims to solve one or more problems existing in the background art.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a lubricating oil dehydration and vaporization treatment device, comprising: a vacuum degassing tank, a dehydration and vaporization assembly disposed on or connected to the upper part of the vacuum degassing tank, the dehydration and vaporization assembly including an overflow plate for uniformly distributing the incoming oil, and a packing layer located below the overflow plate for increasing the contact surface area between the oil and the vacuum, a vacuum acquisition system connected to the gas phase space of the vacuum degassing tank and / or the dehydration and vaporization assembly for establishing and maintaining a vacuum environment, and a circulation pipeline system connected to the outlet of the vacuum degassing tank and the dehydration and vaporization assembly. The system includes an inlet and includes an oil pump and a heater for drawing oil from the vacuum degassing tank, heating it, and then delivering it to the dehydration steam assembly for dehydration. The oil then flows back to the vacuum degassing tank, forming a circulation loop. A first vacuum monitoring element and a second vacuum monitoring element are included. The first vacuum monitoring element monitors the vacuum level at the pumping end of the vacuum acquisition system, and the second vacuum monitoring element monitors the vacuum level inside the vacuum degassing tank. A control system is connected to the first and second vacuum monitoring elements and configured to determine the completion of the dehydration process based on the monitoring signals from the first and second vacuum monitoring elements.

[0008] Furthermore, the control system is configured to determine that the dehydration process is complete when the readings of the first vacuum monitoring device and the second vacuum monitoring device simultaneously reach and remain stable within a preset time period.

[0009] Furthermore, the overflow plate is a tubular overflow plate, with multiple vertical dehydration tubes arranged on its surface. The oil overflows from the top of each dehydration tube to form multiple uniformly distributed liquid streams.

[0010] Furthermore, the packing layer is a Pall ring random packing layer.

[0011] Furthermore, the circulation piping system also includes a precision filter, which is disposed in the circulation piping system after the heater.

[0012] Furthermore, the circulation pipeline system is also provided with an output branch, which is connected in parallel with the dehydration branch leading to the dehydration steam assembly; the control system is also configured to switch the oil circuit from the dehydration branch to the output branch to discharge the oil after determining that dehydration is completed.

[0013] Furthermore, the vacuum acquisition system includes a gas-liquid separator and a vacuum pump connected in sequence, and the first vacuum monitoring device is disposed on the inlet pipe of the gas-liquid separator.

[0014] Furthermore, the vacuum acquisition system includes a vacuum pump and a gas-liquid separator connected in sequence.

[0015] A method for removing moisture vapor from lubricating oil includes the following steps: In a vacuum environment, the oil is circulated between the vacuum degassing tank and the dehydration vaporization component, and the oil is heated during the circulation process. The monitoring parameters represent the first parameter of the system's vacuum level at the extraction end and the second parameter represent the vacuum level inside the vacuum degassing tank. Based on the first parameter and the second parameter, determine whether the dehydration process is complete.

[0016] Furthermore, the steps for determining the completion of the dehydration process include: when the first parameter and the second parameter simultaneously reach and remain stable within a preset time period, the dehydration is determined to be complete.

[0017] The lubricating oil dehydration and vaporization treatment device described in this utility model has the following advantages: by integrating the vacuum degassing tank, dehydration and vaporization component, circulation pipeline system, vacuum acquisition system, and control system into a cohesive whole, it achieves efficient, deep, and safe lubricating oil dehydration. The overflow plate and packing layer combination in the dehydration and vaporization component greatly increases the dispersion and surface area of ​​the oil in a vacuum environment, allowing water to vaporize rapidly; the forced circulation pipeline, combined with the heater, ensures uniform heating of the oil, avoiding oil deterioration caused by local overheating; the dual vacuum monitoring combined with the control system can accurately and automatically determine the dehydration endpoint, replacing the traditional operation that relies on manual experience. While ensuring the dehydration effect, it significantly improves the automation and reliability of the process, fundamentally solving the contradiction between efficient dehydration and ensuring oil quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the lubricating oil vacuum dehydration device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the overflow tray according to an embodiment of the present utility model; Explanation of reference numerals in the attached drawings: 1. Tank; 2. Level gauge; 3. Second vacuum gauge; 4. Oil outlet; 5. Gas phase outlet; 6. Overflow plate; 7. Dehydration tubing; 8. Packing layer; 9. Oil pump; 10. Heater; 11. Precision filter; 12. Dehydration branch; 13. Output branch; 14. First control valve; 15. Second control valve; 16. First vacuum gauge; 17. Gas-liquid separator; 18. Vacuum pump; 19. Temperature sensor; 20. Oil drum. Detailed Implementation

[0019] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] To further illustrate the principle and structure of this utility model, the preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1 and 2 As shown in the figure, this utility model embodiment provides a lubricating oil dehydration and vaporization treatment device. This device, with "vacuum environment support, enhanced circulation treatment, and precise monitoring and control" as its core, constructs a highly efficient and automated lubricating oil dehydration and vaporization system integrating heating, filtration, degassing, and gas-liquid separation. The device as a whole consists of five core modules working together: a vacuum degassing tank, dehydration and vaporization components, a circulation pipeline system, a vacuum acquisition system, and a control system. Each module is tightly connected through pipelines and signal lines, forming a fully automated processing chain of "circulation dehydration—standard output".

[0023] Its core working principle is as follows: Under high vacuum, the oil pump 9 enables forced external circulation of lubricating oil. After being drawn from the vacuum degassing tank, the oil is precisely heated by the heater 10 to reduce viscosity and increase water volatility, and then passes through the precision filter 11 to remove impurities. The treated oil enters the dehydration vaporization component, is evenly dispersed by the overflow plate 6, and then spreads into a large liquid film surface area in the packing layer 8, making full contact with the vacuum environment, so that water (including dissolved water, emulsified water, and free water) is rapidly vaporized and removed. The dehydrated oil flows back to the vacuum degassing tank for temporary storage and continued degassing, forming a circulation loop. The system collects vacuum data at key points in real time through dual vacuum monitoring devices. Based on this, the control system intelligently judges the dehydration process. Once the standard is met, the pipeline is automatically switched, and qualified lubricating oil is output to the finished product container. The entire process is carried out under low-temperature vacuum, effectively balancing dehydration efficiency and lubricating oil quality and safety, and avoiding thermal degradation and chemical damage to the oil.

[0024] Vacuum degassing tank The vacuum degassing tank is a sealed pressure vessel and serves as the basic tank 1 of this device. It is used to temporarily store lubricating oil during processing and circulation, and to provide a continuous vacuum degassing environment. A level gauge 2 is installed on the side wall of tank 1, and a second vacuum monitoring device (second vacuum gauge 3) is installed on the top of tank 1: the level gauge 2 is used to monitor the oil level in the tank in real time to prevent the oil pump 9 from running dry; the second vacuum monitoring device is used to directly collect vacuum data inside the tank and is one of the key sensors for judging the dehydration effect. The bottom of tank 1 has an oil outlet 4, which connects to the inlet of the oil pump 9 in the circulation pipeline system; the top has a gas phase outlet 5, which connects to the vacuum acquisition system to ensure that vaporized water and gas inside the tank can be extracted in a timely manner. The inner wall of tank 1 can be mirror-polished or treated with an anti-adhesion coating to reduce oil residue and waste; the bottom adopts a conical or butterfly-shaped structure to facilitate concentrated oil discharge and minimize dead space accumulation.

[0025] Dehydration vapor assembly The dehydration vaporization assembly is an independent, sealed structure, sealed to the top opening of the vacuum degassing tank via a flange. Together with the vacuum degassing tank, it forms a staged treatment structure with the upper part focusing on efficient dispersion and vaporization, and the lower part focusing on oil storage and continuous degassing. Its core consists of three parts: an overflow plate 6, a support plate, and a packing layer 8. Overflow Pan 6: In this embodiment, the overflow pan 6 is a tubular overflow pan 6. It is generally circular in shape with an annular frame around its perimeter. Ear plates with mounting holes are distributed circumferentially on the outer side of the frame and are fixed to the inner wall of the assembly with bolts to ensure stable installation. A large number of vertical short tubular columns (i.e., dehydration tubular columns 7) are densely arranged on the pan surface, uniformly distributed in an array. After the oil enters the overflow pan 6, a stable liquid level is formed within the pan. When the liquid level exceeds the height of the tubular columns, the oil overflows evenly from the top of each column, forming multiple dispersed fine streams. This avoids the oil impacting the lower structure in a concentrated jet manner, laying the foundation for uniform distribution.

[0026] Support plate: Located directly below the overflow plate 6, it adopts a perforated plate or grid structure with sufficient mechanical strength. It serves two purposes: firstly, to support the packing layer 8 above, and secondly, to ensure that the vaporized water vapor can flow smoothly upwards into the vacuum acquisition system, while simultaneously allowing the oil passing through the packing layer 8 to flow smoothly downwards into the vacuum degassing tank. The edge of the support plate is sealed to the inner wall of the assembly to prevent oil short-circuiting and ensure that all oil must flow through the packing layer 8.

[0027] Packing layer 8: Stacked on top of the support plate, this layer uses Pall ring random packing. The porous structure and irregular arrangement of the Pall rings cause the oil overflowing from the overflow plate 6 to be continuously divided, impacted, and redistributed as it flows through this layer. This ensures that the oil is fully dispersed and spread into an extremely thin liquid film covering the inner and outer surfaces of each Pall ring. This significantly increases the contact surface area between the oil and the vacuum environment, thereby significantly improving the efficiency of moisture vaporization and removal.

[0028] Circulation piping system The circulation pipeline system connects the outlet of the vacuum degassing tank to the inlet of the dehydration vapor assembly, forming the core oil circulation loop. It includes: Oil pump 9: As the power source of the system, it provides the pressure and flow required for forced circulation of lubricating oil.

[0029] Heater 10: In this embodiment, a tubular electric heater 10 is used, the power of which can be configured according to the processing volume. The heater 10 is linked with the control system, and uses a PID control algorithm to precisely heat the flowing oil, controlling the temperature within the optimal range of 50℃ to 70℃. This temperature control strategy can effectively reduce the viscosity of the oil, promote the escape of water, and completely avoid the oxidation and cracking of lubricating oil caused by local overheating.

[0030] Precision filter 11: Located on the pipeline after heater 10 and before the dehydration steam assembly, with a filtration accuracy of 5μm. Its function is not only to remove solid particulate impurities from the oil, but also to break up any possible micro-emulsions, creating favorable conditions for subsequent efficient vacuum dehydration.

[0031] Piping and valves: The system has a dehydration branch 12 and an output branch 13, which are connected in parallel and switched by control valves (such as the first control valve 14 and the second control valve 15). During the dehydration stage, the oil flows to the dehydration steam assembly; after dehydration is completed, the control system switches the valves so that qualified oil is directly discharged to the finished oil tank 20 through the output branch 13.

[0032] Vacuum generation system The vacuum acquisition system is used to establish and maintain a stable high vacuum environment in the gas phase space of the entire device. Its connection relationship is as follows: the gas phase outlet 5 at the top of the dehydration vapor assembly and the gas phase outlet 5 at the top of the vacuum degassing tank are connected in parallel through pipelines and are connected to the first vacuum monitoring device (first vacuum gauge 16), and then connected to the gas-liquid separator 17 and the vacuum pump 18 in sequence.

[0033] The first vacuum monitoring device is used to collect vacuum data at the system's pumping end, reflecting the extraction efficiency of gas after water vaporization; the gas-liquid separator 17 is used to separate oil mist and water vapor entrained during the pumping process, avoiding oil mist contamination of the vacuum pump, and recovering trace amounts of oil; the vacuum pump provides the system with vacuuming power, and through continuous pumping, maintains a high vacuum environment in the vacuum degassing tank and dehydration vaporization assembly that meets the dehydration requirements.

[0034] control system The above control system uses a programmable logic controller as the core control unit. It is connected to the first vacuum monitoring device, the second vacuum monitoring device, and the temperature sensor 19 through an analog input module to collect the system vacuum and oil temperature signals in real time. It is connected to the pipeline control valve through a digital output module to control its opening and closing. It is connected to the electric heater 10 through a PID control module to precisely adjust the heating power. It is connected to the oil pump 9 and the vacuum pump through a relay output module to control their start and stop.

[0035] The control system is configured to execute the following control logic: After system startup, it first controls the opening of the first control valve 14 and the closing of the second control valve 15, starts the oil pump 9 and the vacuum pump, and turns on the electric heater 10, causing the system to enter the circulating dehydration mode. During this process, the control system continuously monitors the readings of the two vacuum monitoring devices. When the readings of the first and second vacuum monitoring devices are detected to remain below the target pressure for a continuous period of time (e.g., 10-30 minutes), the dehydration process is determined to be complete. At this time, the control system performs the following operations in sequence: first, it turns off the electric heater 10; after the oil temperature drops to a safe temperature, it closes the first control valve 14 and simultaneously opens the second control valve 15, switching the system to the finished product output mode until all the oil is output.

[0036] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A lubricating oil dehydration and vapor treatment device, characterized in that, include: Vacuum degassing tank; A dehydration vapor assembly is disposed on the upper part of the vacuum degassing tank or connected to the upper part of the vacuum degassing tank. The dehydration vapor assembly includes an overflow plate for uniformly distributing the incoming oil, and a packing layer located below the overflow plate for increasing the contact surface area between the oil and the vacuum. A vacuum acquisition system, which is connected to the gas phase space of the vacuum degassing tank and / or the dehydration vapor assembly, is used to establish and maintain a vacuum environment; The circulating pipeline system connects the outlet of the vacuum degassing tank and the inlet of the dehydration vapor assembly, and includes an oil pump and a heater, for drawing oil from the vacuum degassing tank, heating it, and then delivering it to the dehydration vapor assembly for dehydration, and then returning it to the vacuum degassing tank to form a circulating loop. A first vacuum monitoring device and a second vacuum monitoring device, wherein the first vacuum monitoring device is used to monitor the vacuum level at the pumping end of the vacuum acquisition system, and the second vacuum monitoring device is used to monitor the vacuum level inside the vacuum degassing tank; The control system is signal-connected to the first vacuum monitoring element and the second vacuum monitoring element, and is configured to determine the completion of the dehydration process based on the monitoring signals of the first vacuum monitoring element and the second vacuum monitoring element.

2. The lubricating oil dehydration and vapor treatment device according to claim 1, characterized in that, The control system is configured to determine that the dehydration process is complete when the readings of the first vacuum monitoring device and the second vacuum monitoring device simultaneously reach and remain stable within a preset time period.

3. The lubricating oil dehydration and vapor treatment device according to claim 1, characterized in that, The overflow plate is a tubular overflow plate with multiple vertical dehydration tubes on its surface. The oil overflows from the top of each dehydration tube to form multiple evenly distributed liquid streams.

4. The lubricating oil dehydration and vapor treatment device according to claim 1, characterized in that, The packing layer is a Pall ring random packing layer.

5. The lubricating oil dehydration and vapor treatment device according to claim 1, characterized in that, The circulation piping system also includes a precision filter, which is located in the circulation piping system after the heater.

6. The lubricating oil dehydration and vapor treatment device according to claim 5, characterized in that, The circulation pipeline system is also provided with an output branch, which is connected in parallel with the dehydration branch leading to the dehydration steam assembly; the control system is also configured to switch the oil circuit from the dehydration branch to the output branch to discharge the oil after determining that dehydration is completed.

7. The lubricating oil dehydration and vapor treatment device according to claim 1, characterized in that, The vacuum acquisition system includes a gas-liquid separator and a vacuum pump connected in sequence, and the first vacuum monitoring device is installed on the inlet pipe of the gas-liquid separator.

8. The lubricating oil dehydration and vapor treatment device according to claim 1, characterized in that, The vacuum acquisition system includes a vacuum pump and a gas-liquid separator connected in sequence.

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