A vacuum separation device for water and gas in a sealing oil system

Abstract

This utility model discloses a vacuum oil separation device for a sealing oil system, comprising a vacuum oil tank, a controller, a vacuum pumping assembly, a liquid level monitoring assembly, an oil replenishment spray assembly, a recirculation oil spray assembly, and an oil supply pump. The vacuum pumping assembly is connected to the top of the vacuum oil tank, and the oil supply pump is connected to the bottom of the vacuum oil tank. The oil replenishment spray assembly consists of a liquid level regulating valve, an oil replenishment pipe, and several oil replenishment atomizing nozzles. The oil replenishment pipe is horizontally positioned above the liquid level in the vacuum oil tank, and the oil replenishment atomizing nozzles are fixed on it. The inlet end of the liquid level regulating valve is connected to the oil replenishment source, and the outlet end is connected to the vacuum oil tank and the oil replenishment pipe. The controller is connected to both the liquid level monitoring assembly and the liquid level regulating valve. The recirculation oil spray assembly includes an oil pump pressure regulating valve, a circulation oil pipe, and circulation oil atomizing nozzles. The oil pump pressure regulating valve is connected to the outlet end of the oil supply pump and the circulation oil pipe. This device effectively solves the technical problem of high water and gas content in the generator sealing oil system, ensuring the safe and stable operation of the generator.

Description

Technical Field

[0001] This utility model belongs to the technical field of steam turbine generator set equipment, specifically relating to a vacuum separation device for water and gas in a sealing oil system. Background Technology

[0002] In the sealing oil systems of coal-fired, gas-fired, and nuclear power generator sets, the sealing oil used is taken from the turbine lubrication oil system. This is because, in a turbine-generator set consisting of a turbine and a generator, the quantity and pressure of the lubricating oil required by the unit, as well as the quantity and pressure of the sealing oil, are all uniformly regulated by the lubrication oil system.

[0003] However, because the generator is located at the very end of the oil supply chain of the turbine generator set, the quality of the lubricating oil it uses is affected by the operation of the upstream equipment, resulting in a generally higher water vapor content in the oil than the initial oil source data. If oil with high water vapor content enters the generator's sealing tiles, it will reduce the purity of hydrogen inside the hydrogen-cooled generator. Studies have shown that a decrease in hydrogen purity will significantly increase the generator's ventilation losses and rotor friction losses. Even worse, it can lead to a decrease in generator insulation, which inevitably poses a serious threat to the safe operation of the generator.

[0004] Therefore, in order to ensure the safe and stable operation of the generator, it is essential to set up a separate oil-water-gas separation scheme for the sealing oil system. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a vacuum separation device for water vapor in a sealing oil system. This device effectively solves the technical problem of high water vapor content in the oil in the generator sealing oil system, achieves efficient separation of water vapor in the sealing oil, and ensures the safe and stable operation of the generator.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a vacuum oil separation device for a sealing oil system, comprising a vacuum oil tank, a controller, a vacuum pumping assembly, a liquid level monitoring assembly, an oil replenishment spray assembly, a recirculation oil spray assembly, and an oil supply pump. The vacuum pumping assembly is connected to the top of the vacuum oil tank, and the oil supply pump is connected to the bottom of the vacuum oil tank for supplying oil to the generator sealing tiles. The oil replenishment spray assembly includes a liquid level regulating valve, an oil replenishment pipe, and several oil replenishment atomizing nozzles. The oil replenishment pipe is horizontally positioned above the liquid surface in the vacuum oil tank, and the several oil replenishment atomizing nozzles are fixed on the oil replenishment pipe. The oil inlet of the liquid level regulating valve is connected to the oil replenishment source, and the oil outlet enters the vacuum oil tank. The empty oil tank is connected to the replenishment pipe; the controller is connected to the liquid level monitoring component and the liquid level regulating valve respectively. The controller is used to receive the liquid level information in the vacuum oil tank monitored by the liquid level monitoring component, and control the opening of the liquid level regulating valve according to the received liquid level information; the recirculating oil spray component includes an oil pump pressure regulating valve, a circulating oil pipe and several circulating oil atomizing nozzles. The circulating oil pipe is horizontally arranged above the liquid surface in the vacuum oil tank, and several circulating oil atomizing nozzles are fixed on the circulating oil pipe; the oil inlet end of the oil pump pressure regulating valve is connected to the oil outlet end of the oil supply pump, and the oil outlet end of the oil pump pressure regulating valve enters the vacuum oil tank and is connected to the circulating oil pipe.

[0008] The replenishing atomizing nozzles are arranged in four rows along the axial direction of the replenishing pipe, with two rows located on the front side of the replenishing pipe and the other two rows located on the rear side of the replenishing pipe; the two rows of replenishing atomizing nozzles on the front side of the replenishing pipe and the two rows of replenishing atomizing nozzles on the rear side of the replenishing pipe are at a 60° angle; and the spraying range of each replenishing atomizing nozzle is 120°.

[0009] The circulating oil atomizing nozzles are arranged in four rows along the axial direction of the circulating oil pipe, with two rows located on the front side of the circulating oil pipe and the other two rows located on the rear side of the circulating oil pipe; the two rows of circulating oil atomizing nozzles on the front side of the circulating oil pipe and the two rows of circulating oil atomizing nozzles on the rear side of the circulating oil pipe are at a 60° angle; and the spraying range of each circulating oil atomizing nozzle is 120°.

[0010] The replenishment oil pipe and the circulation oil pipe are arranged on the left and right sides inside the vacuum oil tank, and the height of the replenishment oil pipe and the circulation oil pipe are the same.

[0011] The oil inlet of the oil supply pump is connected to the vacuum oil tank through an oil suction port located at the bottom of the vacuum oil tank. The oil outlet of the oil supply pump is connected to the oil inlet of the oil pump pressure regulating valve through a circulating oil passage, and is connected to the generator sealing tile through a purification oil passage. A pressure monitor for monitoring the pressure at the oil outlet of the oil supply pump is connected to the purification oil passage.

[0012] The liquid level monitoring component includes a liquid level monitor and a connecting pipe. The liquid level monitor is installed on the connecting pipe and connected to the controller. One end of the connecting pipe is connected to the bottom of the vacuum oil tank, and the other end is connected to the top of the vacuum oil tank.

[0013] The oil replenishment spray assembly also includes a dual oil filter, which is connected to the oil inlet of the level regulating valve and the oil replenishment source, respectively.

[0014] The vacuum assembly includes a vacuum monitoring instrument, a vacuum regulating valve, an oil-gas separator, and a vacuum pump connected in sequence. The vacuum monitoring instrument is connected to the vacuum oil tank, and the vacuum pump vents the gas separated from the vacuum oil tank through the vent pipe.

[0015] The advantages of using this utility model are:

[0016] 1. This utility model discloses a vacuum oil separation device for sealing oil. Firstly, through the design structure of a vacuum oil tank, controller, vacuum pumping assembly, liquid level monitoring assembly, oil replenishment spray assembly, recirculation oil spray assembly, and oil supply pump, replenishment oil is atomized into an oil mist through the oil replenishment nozzle after passing through the liquid level regulating valve and replenishment pipe. Recirculation oil is atomized into an oil mist through the circulation oil atomizing nozzle after passing through the oil pump pressure regulating valve and circulation oil pipe. This constructs two relatively independent oil purification circuits. These two circuits work together to simultaneously purify the sealing oil, achieving more thorough and efficient water-air separation. Furthermore, the vacuum pumping assembly evacuates air from the vacuum oil tank, creating a vacuum environment inside. According to Henry's Law, which states that the solubility of a gas is directly proportional to its pressure, and the principles of vaporization and saturated vapor pressure in physics—that is, as pressure decreases, the boiling point also gradually decreases—in the vacuum environment of the vacuum oil tank, during the period when the oil mist resides in the air, the water vapor in the oil is fully separated and extracted from the vacuum oil tank by the vacuum pumping components. This effectively removes water vapor from the oil, ensuring the stable operation of the entire device and providing purified sealing oil for the generator's sealing tiles.

[0017] Therefore, this utility model effectively solves the technical problem of high water and gas content in the oil of the generator sealing oil system, and avoids the problem of the hydrogen purity in the hydrogen-cooled generator decreasing due to the oil with high water and gas content entering the generator sealing tile, which in turn affects the generator cooling effect, reduces the generator efficiency and damages the generator insulation, thus providing a reliable guarantee for the safe and stable operation of the generator.

[0018] Secondly, a controller is connected to both the liquid level monitoring component and the liquid level regulating valve. The controller receives the liquid level information in the vacuum oil tank from the liquid level monitoring component and controls the opening of the liquid level regulating valve based on the received liquid level information, thereby controlling the amount of oil replenished to the vacuum oil tank. This achieves precise liquid level control, ensuring that the oil in the vacuum oil tank is always within a suitable liquid level range, ensuring the stability of the liquid level in the vacuum oil tank, and avoiding the impact on the device performance due to excessively high or low liquid levels. This improves the automatic adjustability, reliability, and stability of the device.

[0019] 2. In this utility model, the oil replenishing atomizing nozzles are arranged in four rows along the axial direction of the oil replenishing pipe, with two rows located on the front side of the oil replenishing pipe and the other two rows located on the rear side of the oil replenishing pipe. The two rows of oil replenishing atomizing nozzles on the front side of the oil replenishing pipe and the two rows of oil replenishing atomizing nozzles on the rear side of the oil replenishing pipe are at an angle. Moreover, the spraying range of each oil replenishing atomizing nozzle is 120°. This allows the oil replenishing atomizing nozzles to spray in the circumferential direction of the oil replenishing pipe, forming a better oil mist distribution in the vacuum oil tank, increasing the contact time and area between the oil mist and the vacuum environment, significantly improving the purification effect of the sealing oil, and ensuring the stable and reliable operation of the generator sealing oil system.

[0020] 3. In this utility model, the circulating oil atomizing nozzles are arranged in four rows along the axial direction of the circulating oil pipe, with two rows located at the front of the circulating oil pipe and the other two rows located at the rear of the circulating oil pipe. The two rows of circulating oil atomizing nozzles at the front of the circulating oil pipe and the two rows of circulating oil atomizing nozzles at the rear of the circulating oil pipe are at a 60° angle. The spraying range of each circulating oil atomizing nozzle is 120°. Similarly, the circulating oil atomizing nozzles can spray in the circumferential direction of the circulating oil pipe, forming a better oil mist distribution in the vacuum oil tank, increasing the contact time and area between the oil mist and the vacuum environment, significantly improving the purification effect of the sealing oil, and ensuring the stable and reliable operation of the generator sealing oil system.

[0021] 4. In this utility model, the design of arranging the oil replenishment pipe and the circulating oil pipe on both sides at the same height enables the oil replenishment and recirculation oil to be distributed more evenly in the vacuum oil tank, further optimizing the distribution of oil mist in the vacuum environment, ensuring that water vapor in the oil is fully separated under vacuum, improving the efficiency and effect of vacuum separation of water vapor in the oil in the entire sealing oil system, ensuring the supply of high-quality purified sealing oil for the generator sealing tiles, and enhancing the stability and reliability of generator operation.

[0022] 5. In this utility model, by connecting a pressure monitor to the purified oil passage, the accuracy of pressure regulation and operational stability of the device are improved. The pressure monitor can monitor the pressure at the oil outlet of the oil supply pump and the oil circuit output to the generator sealing tile in real time. When abnormal fluctuations occur, the oil pump pressure regulating valve can adjust the pressure back to the original set pressure range by adjusting the opening in time, ensuring the stability of the oil supply pressure at the oil outlet of the oil supply pump, and further improving the reliability and stability of the device.

[0023] Furthermore, during the pressure regulation process of the oil pump pressure regulating valve, an oil circulation mechanism is implemented. A portion of the output oil from the oil supply pump is guided back to the vacuum oil tank via the oil pump pressure regulating valve, allowing this portion of oil to undergo a further purification process by separating water vapor from the oil under vacuum, thus further improving the purity of the oil. The oil that does not pass through the oil pump pressure regulating valve is directly output to the generator sealing tiles, ensuring a stable and clean supply of sealing oil to the sealing tiles. This design not only ensures sufficient oil purification but also maintains the stability of the unit's oil supply, improving the reliability and operational efficiency of the unit.

[0024] 6. In this utility model, the connection structure of the liquid level monitor, the connecting pipe and the vacuum oil tank forms a connected structure, which enables the liquid level monitor to obtain liquid level information at different height positions in the vacuum oil tank in a comprehensive and accurate manner, realize all-round monitoring of the liquid level, and further improve the operational reliability of the device.

[0025] 7. In this utility model, the design of connecting the dual oil filter to the oil inlet of the liquid level regulating valve and the oil replenishment source respectively ensures that the oil replenishment source has been purified and filtered before entering the vacuum oil tank, preventing impurities in the oil from clogging the oil replenishment atomizing nozzle and the circulating oil atomizing nozzle.

[0026] 8. In this utility model, a vacuum pumping assembly is formed by sequentially connecting a vacuum monitoring instrument, a vacuum regulating valve, an oil-gas separator, and a vacuum pump. The vacuum pump operates continuously to establish a negative pressure environment. The vacuum monitoring instrument monitors and displays the vacuum level in the vacuum oil tank in real time, allowing operators to keep track of the status. The vacuum regulating valve can flexibly adjust its opening to control the vacuum level, ensuring stable operation of the device. The oil-gas separator can effectively eliminate air bubbles in the gas during the vacuuming process, preventing blockage of the vacuum pump inlet pipe, avoiding a decrease in vacuuming capacity and vacuum level, providing a good vacuum environment for water-gas separation in oil, improving the purification effect of the sealing oil and the reliability of the device operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the vacuum oil-water-gas separation system of this utility model;

[0028] Figure 2 This is a schematic diagram showing the distribution of the oil replenishment atomizing nozzles in this utility model.

[0029] The following are the labels in the diagram: 1. Vacuum oil tank; 2. Vacuum pump; 3. Oil pump pressure regulating valve; 4. Liquid level regulating valve; 5. Oil supply pump; 6. Oil replenishment atomizing nozzle; 7. Circulating oil atomizing nozzle; 8. Liquid level monitoring component; 801. Liquid level monitor; 802. Connecting pipe; 9. Vacuum regulating valve; 10. Vacuum monitoring instrument; 101. Oil replenishment pipe; 102. Circulating oil pipe; 11. Pressure monitor; 12. Oil-gas separator; 13. Dual oil filter; 14. First liquid level monitoring interface; 15. Second liquid level monitoring interface; 20. Purified oil passage; 21. Circulating oil passage; 22. Drain pipe. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. For ease of description, the description of the relative positional relationships of each component is based on the layout of the accompanying drawings, such as the positional relationships of front, back, top, bottom, left, and right, which are determined according to the layout direction of the accompanying drawings.

[0031] Example 1

[0032] As a basic embodiment of this utility model, this embodiment provides a vacuum separation device for water vapor in a sealing oil system, such as... Figure 1 As shown, it includes a vacuum oil tank 1, a controller, a vacuum pumping assembly, a liquid level monitoring assembly 8, an oil replenishment spray assembly, a recirculation oil spray assembly, and an oil supply pump 5.

[0033] A vacuum pumping assembly is connected to the top of the vacuum oil tank 1. Continuous operation of the assembly maintains a -90 kPa vacuum environment within the tank, optimal for water vapor separation. The principle behind vacuum separation of water vapor from oil is to change the phase state of substances by reducing pressure. Specifically, the vacuum pumping assembly performs a vacuuming operation on the tank 1, reducing the internal pressure. Since water vaporizes at lower temperatures, and oil remains liquid due to its much higher boiling point, separation is achieved. Furthermore, according to Henry's Law, the solubility of a gas in a liquid is directly proportional to pressure. Under vacuum, gases dissolved in the oil (such as air and oxygen) precipitate out due to the reduced pressure.

[0034] Oil supply pump 5 is connected to the bottom of vacuum oil tank 1 to supply oil to the generator sealing tiles, delivering purified sealing oil. Oil supply pump 5 is preferably a three-screw pump, model D4070N2LVBP.

[0035] The oil replenishment spray assembly includes a level regulating valve 4, an oil replenishment pipe 101, and several oil replenishment atomizing nozzles 6. The oil replenishment pipe 101 is horizontally positioned above the liquid surface in the vacuum oil tank 1, and the several oil replenishment atomizing nozzles 6 are fixed to the oil replenishment pipe 101. The level regulating valve 4 preferably uses a self-operated actuator, model 35812. The inlet end of the level regulating valve 4 is connected to the oil replenishment source, and the outlet end of the level regulating valve 4 enters the vacuum oil tank 1 and connects to the oil replenishment pipe 101. During operation, the turbine lubricating oil, as the sealing oil replenishment source, is regulated by the level regulating valve 4 to control the amount of oil entering the vacuum oil tank 1, maintaining the liquid level in the vacuum oil tank 1 at the designed height. After passing through the oil replenishment atomizing nozzles 6, the fine oil droplets can remain in the air for a relatively long time, allowing for sufficient separation of water and air in the oil. The oil droplets are then extracted from the vacuum oil tank 1 by the vacuum assembly, and the oil droplets after vacuum separation fall back and mix with the oil stored in the vacuum oil tank 1.

[0036] Considering the impact of the liquid level design height and the height difference between the replenishing oil atomizing nozzle 6 and the circulating oil atomizing nozzle 7 on the operation of the device, a larger height difference is theoretically more beneficial to the optimization of device performance. However, if the liquid level is too low, the oil supply pump 5 will draw in air bubbles, thus affecting the normal operation of the device. Therefore, under the critical premise of ensuring that the oil supply pump 5 does not draw in air bubbles, the height difference between the liquid level and the replenishing oil atomizing nozzle 6 and the circulating oil atomizing nozzle 7 should be maximized as much as possible. Based on the actual dimensions of the vacuum oil tank 1 in this embodiment, the liquid level in the vacuum oil tank 1 is typically controlled within 100mm above and below the centerline of the vacuum oil tank 1 to achieve the best balance between device performance and operational stability.

[0037] The liquid level monitoring component 8 is used to monitor the liquid level of the vacuum oil tank 1. The controller is connected to the liquid level monitoring component 8 and the liquid level regulating valve 4 respectively. The controller is used to receive the liquid level information in the vacuum oil tank 1 monitored by the liquid level monitoring component 8, and control the opening of the liquid level regulating valve 4 according to the received liquid level information, thereby controlling the amount of oil replenished to the vacuum oil tank 1.

[0038] The recirculating oil spray assembly includes an oil pump pressure regulating valve 3, a circulating oil pipe 102, and several circulating oil atomizing nozzles 7. The circulating oil pipe 102 is horizontally positioned above the liquid surface in the vacuum oil tank 1, and the several circulating oil atomizing nozzles 7 are fixed to the circulating oil pipe 102. The oil pump pressure regulating valve 3 is preferably an MR98H oil pressure regulating valve. The oil pump pressure regulating valve 3 is used to adjust the oil outlet pressure of the oil supply pump 5. The oil inlet of the oil pump pressure regulating valve 3 is connected to the oil outlet of the oil supply pump 5, and the oil outlet of the oil pump pressure regulating valve 3 enters the vacuum oil tank 1 and connects to the circulating oil pipe 102, allowing the sealing oil to recirculate back into the vacuum oil tank 1. When this device is running, after being acted upon by the circulating oil atomizing nozzles 7, the fine oil droplets can remain in the air for a relatively long time, allowing for sufficient separation of water and gas in the oil. The oil droplets are then extracted from the vacuum oil tank 1 by the vacuum assembly, and the oil droplets after vacuum separation fall back and mix with the oil stored in the vacuum oil tank 1, achieving a second oil-gas purification and separation.

[0039] In summary, the oil replenishment process of this invention involves the oil level regulating valve 4 and the oil replenishment pipe 101 being atomized into an oil mist by the oil replenishment atomizing nozzle 6 before entering the vacuum oil tank 1. Similarly, the recirculated oil is atomized into an oil mist by the circulating oil atomizing nozzle 7 after passing through the oil pump pressure regulating valve 3 and the circulating oil pipe 102. This establishes two relatively independent oil purification circuits to achieve more thorough separation of water and vapor in the oil. These two circuits work in tandem to simultaneously purify the sealing oil. Furthermore, the vacuum pumping assembly evacuates air from the vacuum oil tank 1, creating a vacuum environment inside. Under vacuum, during the residence of the oil mist in the vacuum oil tank 1, water and vapor in the oil are fully separated and extracted by the vacuum pumping assembly, effectively removing water and vapor from the oil and ensuring the stable operation of the entire device. This provides purified sealing oil for the generator sealing tiles, ensuring reliable stable operation of the generator.

[0040] Example 2

[0041] Based on the structure of Example 1, the arrangement of the replenishing oil atomizing nozzle 6 and the circulating oil atomizing nozzle 7 has been optimized in this example.

[0042] like Figure 1 , Figure 2 As shown, the oil replenishing atomizing nozzles 6 are arranged in four rows along the axial direction of the oil replenishing pipe 101, with two rows located at the front of the oil replenishing pipe 101 and the other two rows located at the rear of the oil replenishing pipe 101. The two rows of oil replenishing atomizing nozzles 6 located at the front of the oil replenishing pipe 101 form a 60° angle with each other, as do the two rows located at the rear of the oil replenishing pipe 101. Each oil replenishing atomizing nozzle 6 has a spray range of 120°. This arrangement allows the oil replenishing atomizing nozzles 6 to spray in the circumferential direction of the oil replenishing pipe 101, creating a better oil mist distribution within the vacuum oil tank 1. This increases the contact time and area between the oil mist and the vacuum environment, significantly improving the sealing oil purification effect and ensuring the stable and reliable operation of the generator sealing oil system.

[0043] Similarly, the circulating oil atomizing nozzles 7 are arranged in four rows along the axial direction of the circulating oil pipe 102, which are not shown in the attached figure. Two rows are located on the front side of the circulating oil pipe 102, and the other two rows are located on the rear side of the circulating oil pipe 102. The two rows of circulating oil atomizing nozzles 7 located on the front side of the circulating oil pipe 102 are at a 60° angle to each other, and the two rows of circulating oil atomizing nozzles 7 located on the rear side of the circulating oil pipe 102 are also at a 60° angle to each other. The spraying range of each circulating oil atomizing nozzle 7 is 120°.

[0044] Both the replenishing oil atomizing nozzle 6 and the circulating oil atomizing nozzle 7 preferably use solid conical spiral nozzles, model 3 / 8PMD32120. This model has a smooth flow channel, is resistant to clogging, has a wide droplet diameter distribution range, and a maximum spray angle of 120°, resulting in superior overall oil atomization and more thorough separation of water and air in the oil. The replenishing oil atomizing nozzle 6 and the circulating oil atomizing nozzle 7 have threaded connections for easy disassembly, and any holes left after disassembly can be sealed with plugs of the same specifications. Therefore, the number of nozzles in the replenishing oil atomizing nozzle 6 and the circulating oil atomizing nozzle 7 can be flexibly adjusted according to the oil volume of different generator models, making one vacuum separation and sealing device suitable for various generator models.

[0045] Furthermore, the oil replenishment pipe 101 and the circulating oil pipe 102 are arranged horizontally within the vacuum oil tank 1, and both are at the same height. This horizontal arrangement and identical height of the oil replenishment and circulating oil pipes 101 and 102 ensures a more uniform distribution of replenished and recirculated oil within the vacuum oil tank 1, further optimizing the distribution of oil mist in the vacuum environment. This ensures thorough separation of water vapor in the oil under vacuum, improving the efficiency and effectiveness of the entire sealing oil system in separating water vapor from the oil. This guarantees the supply of high-quality purified sealing oil to the generator sealing tiles, enhancing the stability and reliability of generator operation.

[0046] Example 3

[0047] Based on the structure of Example 2, this example optimizes the vacuum separation device for water and gas in the sealing oil system.

[0048] Continue to refer to Figure 1The oil supply pump 5 has its inlet end connected to the vacuum oil tank 1 via an oil suction port located at the bottom of the vacuum oil tank 1. The oil supply pump 5's outlet end is connected to the inlet end of the oil pump pressure regulating valve 3 via a circulation oil channel 21. The oil supply pump 5's outlet end is also connected to the generator sealing tile via a purification oil channel 20. In other words, the oil supply pump 5's outlet end is divided into two paths. During the pressure regulation process of the oil pump pressure regulating valve 3, because the oil supply pump 5's outlet end is divided into two paths, the sealing oil drawn from the vacuum oil tank 1 by the oil supply pump 5 is diverted into two directions: one path of sealing oil passes through the oil pump pressure regulating valve 3 and is then transported sequentially through the oil pump pressure regulating valve 3's outlet end and the circulation oil pipe 102. At this point, this path of sealing oil essentially becomes recirculated oil, which is then atomized by the circulation oil atomizing nozzle 7 and undergoes water-air separation again within the vacuum oil tank 1; while the other path of sealing oil that does not pass through the oil pump pressure regulating valve 3 is directly transported to the generator sealing tile via the purification oil channel 20.

[0049] Furthermore, a pressure monitor 11 for monitoring the pressure at the oil outlet of the oil supply pump 5 is connected to the purification oil passage 20. The pressure monitor 11 is preferably a pressure transmitter of the 3051CG series.

[0050] During operation, the oil supply pump 5 draws oil from the vacuum oil tank 1, builds pressure, and outputs it through the outlet. The outlet pressure of the oil supply pump 5 has a certain range requirement, generally needing to be controlled within 9-11 bar. With the design of the pressure monitor 11 on the purified oil passage 20, the pressure monitor 11 will acquire the outlet pressure value of the oil supply pump 5 in real time. When abnormal fluctuations occur in the outlet pressure of the oil supply pump 5, it is usually due to a change in the oil consumption of the generator sealing tiles, which in turn causes pressure fluctuations. At this time, the control oil pump pressure regulating valve 3 adjusts the pressure at the outlet of the oil supply pump 5 to restore the outlet pressure of the oil supply pump 5 to the set value. Meanwhile, a portion of the oil output from the oil supply pump 5 returns to the vacuum oil tank 1 via the circulating oil channel 21 and the oil pump pressure regulating valve 3. Then, through the action of the circulating oil atomizing nozzle 7, water vapor in the oil is separated again. The small oil droplets after the water vapor is separated mix with the oil stored in the vacuum oil tank 1. This cycle repeats to ensure that the oil in the vacuum oil tank 1 is fully purified. The oil that does not pass through the oil pump pressure regulating valve 3 is transported to the generator sealing tile through the purification oil channel 20, thereby ensuring the stable operation of the entire device.

[0051] Example 4

[0052] Based on the structure of Example 3, this example further optimizes the vacuum separation device for water and gas in the sealing oil system.

[0053] The liquid level monitoring component 8 includes a liquid level monitor 801 and a connecting pipe 802. The liquid level monitor 801 is installed on the connecting pipe 802 and connected to the controller. One end of the connecting pipe 802 is connected to the bottom of the vacuum oil tank 1, and the other end is connected to the top of the vacuum oil tank 1.

[0054] Specifically, the vacuum oil tank 1 is equipped with a first liquid level monitoring interface 14 and a second liquid level monitoring interface 15. The first liquid level monitoring interface 14 and the second liquid level monitoring interface 15 are respectively flange-connected to the vacuum oil tank 1. The first liquid level monitoring interface 14 is located at the upper part of the vacuum oil tank 1, and the second liquid level monitoring interface 15 is located at the bottom of the vacuum oil tank 1. One end of the connecting pipe 802 is connected to the second liquid level monitoring interface 15, and the other end is connected to the first liquid level monitoring interface 14. In this way, the liquid level monitor 8 and the vacuum oil tank 1 form a communication structure, ensuring accurate acquisition of the liquid level information within the vacuum oil tank 1.

[0055] It should be noted that the liquid level monitor 801 and the liquid level regulating valve 4 can be controlled by either an electrical signal or a pneumatic signal. In this invention, the pneumatic signal control method is preferred. The liquid level monitor 8 uses a liquid level regulator, and in practical applications, the product with model number 12812 is preferred.

[0056] The level monitor 801 monitors the level of the vacuum oil tank 1 in real time. When the level of sealing oil in the vacuum oil tank 1 is too low, the level monitor 801 converts the detected level signal into a gas source signal of varying intensity. This gas source signal is transmitted to the level regulating valve 4 via the controller, thereby adjusting the valve opening of the level regulating valve 4 to allow the vacuum oil tank 1 to begin replenishing oil. As the level in the vacuum oil tank 1 gradually rises, the intensity of the gas source signal converted from the level signal detected by the level monitor 801 gradually decreases. Therefore, the level regulating valve 4, through the joint control of the controller and the level monitor 801, maintains a certain opening, ensuring that the level of the vacuum oil tank 1 is always maintained within the designed height range.

[0057] Example 5

[0058] Based on the structure of Example 4, this example further optimizes the vacuum separation device for water and gas in the sealing oil system.

[0059] The oil replenishment spray assembly also includes a dual oil filter 13, which is connected to the oil inlet of the level regulating valve 4 and the oil replenishment source, respectively.

[0060] Specifically, the inlet of the dual oil filter 13 is connected to the replenishing oil source, and the outlet is connected to the inlet of the level regulating valve 4, ensuring that the replenishing oil source has been purified and filtered before entering the vacuum oil tank 1, preventing impurities in the oil from clogging the replenishing atomizing nozzle 6 and the circulating oil atomizing nozzle 7.

[0061] In this embodiment, the dual oil filter 13 is preferably of model DU.1001.25VG.

[0062] Example 6

[0063] Based on the structure of Example 5, the structure of the vacuum pumping component has been optimized in this example.

[0064] Continue to refer to Figure 1 The vacuum assembly includes a vacuum monitoring instrument 10, a vacuum regulating valve 9, an oil-gas separator 12, and a vacuum pump 2 connected in sequence. The vacuum monitoring instrument 10 is connected to the vacuum oil tank 1, and the vacuum pump 2 vents the gas separated from the vacuum oil tank 1 through the vent pipe 22. Since the specific connection relationships between the vacuum monitoring instrument 10, the vacuum regulating valve 9, the oil-gas separator 12, and the vacuum pump 2 are known technologies, they will not be described further here.

[0065] During the vacuuming process, the vacuum pump 2 runs continuously to establish a negative pressure environment in the vacuum oil tank 1; the vacuum monitoring instrument 10 monitors the vacuum level in the vacuum oil tank 1 in real time throughout the vacuuming process and displays the monitored vacuum level value in an intuitive way so that the operator can understand the vacuum status in a timely manner; the vacuum regulating valve 9 controls the vacuum level of the vacuum oil tank 1 by adjusting the opening degree.

[0066] Furthermore, the water vapor extracted from the vacuum oil tank 1 by the vacuum pump 2 often contains a large number of air bubbles. If there are too many air bubbles, they can easily clog the air inlet pipe of the vacuum pump 2, leading to a decrease in vacuum pumping capacity and a reduction in the vacuum level inside the vacuum oil tank 1. Therefore, the design of the oil-gas separator 12 is particularly important. When the gas carrying air bubbles enters the extraction pipe, it will undergo expansion and defoaming in the vacuum pump oil-gas separator 12 before entering the vacuum pump 2. Ultimately, only the gas is extracted and discharged into the atmospheric environment. The design of the oil-gas separator 12 provides a good vacuum environment for the oil-water-gas separation process.

[0067] In this embodiment, the vacuum pump 2 is preferably a rotary vane vacuum pump of model SV100B, the vacuum regulating valve 9 is preferably a throttle valve of model 25BJ-1.6PA, the vacuum monitoring instrument 10 is preferably an absolute pressure transmitter of model 3051TA series, and the vacuum pump oil-gas separator 12 is preferably model CW-002.

[0068] The above description is only a specific embodiment of the present utility model. Any feature disclosed in this specification may be replaced by other equivalent or similar features unless otherwise specified. All features or steps in all methods or processes disclosed may be combined in any way except for mutually exclusive features and / or steps.

Claims

1. A vacuum separation device for water vapor in a sealing oil system, characterized in that: It includes a vacuum oil tank (1), a controller, a vacuum pumping assembly, a liquid level monitoring assembly (8), an oil replenishment spray assembly, a recirculation oil spray assembly, and an oil supply pump (5). The vacuum pumping assembly is connected to the top of the vacuum oil tank (1), and the oil supply pump (5) is connected to the bottom of the vacuum oil tank (1) to supply oil to the generator sealing tiles. The oil replenishment spray assembly includes a level regulating valve (4), an oil replenishment pipe (101), and several oil replenishment atomizing nozzles (6). The oil replenishment pipe (101) is horizontally positioned above the liquid surface in the vacuum oil tank (1). Several oil replenishment atomizing nozzles (6) are fixed on the oil replenishment pipe (101). The oil inlet of the level regulating valve (4) is connected to the oil replenishment source, and the oil outlet enters the vacuum oil tank (1) and is connected to the oil replenishment pipe (101). The controller is connected to the level monitoring component (8) and the level regulating valve (4) respectively. The controller is used to receive the liquid level information in the vacuum oil tank (1) monitored by the level monitoring component (8) and control the opening degree of the level regulating valve (4) according to the received liquid level information. The recirculating oil spray assembly includes an oil pump pressure regulating valve (3), a circulating oil pipe (102), and several circulating oil atomizing nozzles (7). The circulating oil pipe (102) is horizontally arranged above the liquid surface in the vacuum oil tank (1), and several circulating oil atomizing nozzles (7) are fixed on the circulating oil pipe (102). The oil inlet end of the oil pump pressure regulating valve (3) is connected to the oil outlet end of the oil supply pump (5), and the oil outlet end of the oil pump pressure regulating valve (3) enters the vacuum oil tank (1) and is connected to the circulating oil pipe (102).

2. The vacuum separation device for water vapor in a sealing oil system according to claim 1, characterized in that: The oil replenishing atomizing nozzles (6) are arranged in four rows along the axial direction of the oil replenishing pipe (101), with two rows located on the front side of the oil replenishing pipe (101) and the other two rows located on the rear side of the oil replenishing pipe (101). The two rows of oil replenishing atomizing nozzles (6) located on the front side of the oil replenishing pipe (101) and the two rows of oil replenishing atomizing nozzles (6) located on the rear side of the oil replenishing pipe (101) are at a 60° angle. The spraying range of each oil replenishing atomizing nozzle (6) is 120°.

3. The vacuum separation device for water vapor in a sealing oil system according to claim 2, characterized in that: The circulating oil atomizing nozzles (7) are arranged in four rows along the axial direction of the circulating oil pipe (102), with two rows located on the front side of the circulating oil pipe (102) and the other two rows located on the rear side of the circulating oil pipe (102). The two rows of circulating oil atomizing nozzles (7) located on the front side of the circulating oil pipe (102) and the two rows of circulating oil atomizing nozzles (7) located on the rear side of the circulating oil pipe (102) are at a 60° angle. The spraying range of each circulating oil atomizing nozzle (7) is 120°.

4. The vacuum separation device for water vapor in a sealing oil system according to claim 3, characterized in that: The replenishing oil pipe (101) and the circulating oil pipe (102) are arranged on the left and right sides inside the vacuum oil tank (1), and the replenishing oil pipe (101) and the circulating oil pipe (102) are at the same height.

5. The vacuum separation device for water vapor in a sealing oil system according to claim 1, characterized in that: The oil inlet of the oil supply pump (5) is connected to the vacuum oil tank (1) through the oil suction port located at the bottom of the vacuum oil tank (1). The oil outlet of the oil supply pump (5) is connected to the oil inlet of the oil pump pressure regulating valve (3) through the circulating oil passage (21) and connected to the generator sealing tile through the purification oil passage (20). A pressure monitor (11) for monitoring the pressure at the oil outlet of the oil supply pump (5) is connected to the purification oil passage (20).

6. The vacuum oil separation device for a sealing oil system according to claim 1, characterized in that: The liquid level monitoring component (8) includes a liquid level monitor (801) and a connecting pipe (802). The liquid level monitor (801) is installed on the connecting pipe (802) and connected to the controller. One end of the connecting pipe (802) is connected to the bottom of the vacuum oil tank (1), and the other end is connected to the top of the vacuum oil tank (1).

7. The vacuum oil separation device for a sealing oil system according to claim 1, characterized in that: The oil replenishment spray assembly also includes a dual oil filter (13), which is connected to the oil inlet of the level regulating valve (4) and the oil replenishment source, respectively.

8. The vacuum separation device for water vapor in a sealing oil system according to claim 1, characterized in that: The vacuum assembly includes a vacuum monitoring instrument (10), a vacuum regulating valve (9), an oil-gas separator (12), and a vacuum pump (2) connected in sequence. The vacuum monitoring instrument (10) is connected to the vacuum oil tank (1), and the vacuum pump (2) vents the gas separated from the vacuum oil tank (1) through the vent pipe (22).

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