Sealing oil purification system

Abstract

The invention relates to a sealing oil purification system which comprises an oil conveying pipeline, an oil inlet of the oil conveying pipeline is communicated with an oil source, and an oil outlet of the oil conveying pipeline is communicated with a generator system; the vacuum oil tank is communicated with the oil conveying pipeline, negative pressure is formed in the vacuum oil tank, and the vacuum oil tank is used for separating gas in the sealing oil; the separation device is communicated with the oil conveying pipeline, is arranged at the upstream of the vacuum oil tank, and is connected with a first vacuum pump; and the communicating pipeline is used for allowing gas to flow and is communicated with the top of the separating device and the top of the vacuum oil tank. The sealing oil purification system can convey high-purity sealing oil to the generator system, so that the purity of hydrogen in the generator system is guaranteed, and the sealing oil purification system is good in economical efficiency and high in safety.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power plant auxiliary equipment, and in particular to a sealing oil purification system. Background Art

[0002] The generators in power plants often use hydrogen to cool the rotor windings. To prevent hydrogen leakage, the hydrogen needs to be sealed with sealing oil. After the power plant has been running for a period of time, the gas in the sealing oil will be released into the hydrogen, causing the purity of the hydrogen to decrease, which in turn leads to an increase in wind friction losses (i.e. the energy consumed by the fan used to drive the hydrogen circulation).

[0003] In the related art, the method of replacing hydrogen is often used to improve the purity of hydrogen, that is, high-purity hydrogen is introduced to replace the original low-purity hydrogen. However, the above method has poor economic efficiency, and the low-purity hydrogen may leak during the discharge process, posing a safety hazard. Summary of the invention

[0004] The purpose of the present disclosure is to provide a sealing oil purification system, which can deliver high-purity sealing oil to a generator system, thereby ensuring the purity of hydrogen in the generator system, with good economy and high safety.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a sealing oil purification system, which includes: an oil pipeline, an oil inlet of the oil pipeline is connected to an oil source, and an oil outlet of the oil pipeline is connected to a generator system; a vacuum oil tank, the vacuum oil tank is connected to the oil pipeline, a negative pressure is formed in the vacuum oil tank and is used to separate the gas in the sealing oil; a separation device, the separation device is connected to the oil pipeline and is arranged upstream of the vacuum oil tank, the separation device is connected to a first vacuum pump; and a connecting pipeline, the connecting pipeline is used for gas flow, and is connected to the top of the separation device and the top of the vacuum oil tank.

[0006] Optionally, the oil pipeline includes a main pipeline, a first branch pipeline and a second branch pipeline, one end of the main pipeline is connected to the oil source, and the other end is connected to one end of the first branch pipeline and one end of the second branch pipeline, the other end of the first branch pipeline is connected to the second branch pipeline, the first branch pipeline is connected to the separation device, and the second branch pipeline is connected to the vacuum oil tank, and the sealing oil purification system also includes a flow adapter, which is connected to the second branch pipeline and is used to adjust the amount of sealing oil in the second branch pipeline.

[0007] Optionally, the oil pipeline also includes a first sub-pipeline and a second sub-pipeline, the first sub-pipeline and the second sub-pipeline are both connected to the second branch pipeline and the generator system, the first sub-pipeline is provided with the vacuum oil tank and the first oil pump, the first oil pump is used to drive the sealing oil to flow to the generator system through the first sub-pipeline.

[0008] Optionally, the oil delivery pipeline also includes a circulation pipeline, one end of which is connected to the first sub-pipeline and is located downstream of the first oil pump, and the other end is arranged in the vacuum oil tank through an atomizing nozzle, and the atomizing nozzle is arranged on the top of the vacuum oil tank.

[0009] Optionally, a second oil pump is provided on the second sub-pipeline, and the second oil pump is used to drive the sealing oil to flow to the generator system through the second sub-pipeline.

[0010] Optionally, the first branch pipeline, the first sub-pipeline and the second sub-pipeline are all provided with a first switch valve.

[0011] Optionally, the separation device has a separation tank and an oil storage tank, the oil storage tank is connected to the separation tank and arranged at the bottom of the separation tank, the separation tank is externally connected to a vacuum pipeline, the vacuum pipeline is provided with the first vacuum pump, the first vacuum pump is used to form a negative pressure in the separation tank by vacuuming, and the connecting pipeline is connected to the vacuum pipeline.

[0012] Optionally, the sealing oil purification system further includes a cooler and a drain tank, wherein the cooler and the drain tank are sequentially arranged on the vacuum pipeline along the gas flow direction, and an isolation valve is also arranged on the vacuum pipeline between the drain tank and the cooler.

[0013] Optionally, there are two first vacuum pumps, and the two first vacuum pumps are arranged in parallel downstream of the sewage tank.

[0014] Optionally, a filter and a third oil pump are provided on the first branch pipeline, the filter is arranged downstream of the separation device, and the third oil pump is connected to the first branch pipeline.

[0015] Through the above technical scheme, in the sealing oil purification system provided by the present disclosure, the separation device is connected to the first vacuum pump, so that a negative pressure can be formed inside the separation device, so that when the sealing oil flows through the separation device, the negative pressure environment in the separation device can cause the gas in the sealing oil to precipitate, in other words, the separation device can improve the purity of the sealing oil. Similarly, the vacuum oil tank can also improve the purity of the sealing oil. In addition, the separation device is arranged upstream of the vacuum oil tank, so the separation device can be used as a primary purification device for purifying the sealing oil, and the vacuum oil tank can be used as a secondary purification device for purifying the sealing oil. In other words, the sealing oil purification system can purify the sealing oil twice, thereby ensuring the purity of the sealing oil. On this basis, since the connecting pipeline is connected to the top of the separation device and the top of the vacuum oil tank, the connecting pipeline can connect the negative pressure environment in the vacuum oil tank with the negative pressure environment in the separation device to improve the vacuum degree of the vacuum oil tank and the separation device with a lower vacuum degree, thereby improving the purification effect of the sealing oil purification system on the sealing oil. In summary, the sealing oil purification system can deliver high-purity sealing oil to the generator system, thereby ensuring the purity of hydrogen in the generator system, with good economy and high safety.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic diagram of a sealing oil purification system provided by an exemplary embodiment of the present disclosure.

[0018] Description of Reference Numerals 110, main pipeline; 120, first branch pipeline; 121, filter; 122, third oil pump; 130, second branch pipeline; 131, flow adapter; 140, first sub-pipeline; 141, first oil pump; 150, second sub-pipeline; 151, second oil pump; 160, circulation pipeline; 161, atomizing nozzle; 200, vacuum oil tank; 300, separation device; 310, separation tank; 320, oil storage tank; 400, connecting pipeline; 500, first switch valve; 600, vacuum pipeline; 610, first vacuum pump; 620, cooler; 630, sewage tank; 640, isolation valve. DETAILED DESCRIPTION

[0019] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0020] In the present disclosure, unless otherwise stated, directional words such as "top" and "bottom" refer to the "top" and "bottom" of the corresponding parts in the direction of gravity when in use. The terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0021] According to a specific embodiment of the present disclosure, a sealing oil purification system is provided, referring to Figure 1 As shown in, the sealing oil purification system includes: an oil pipeline, the oil inlet of the oil pipeline is connected to the oil source, and the oil outlet of the oil pipeline is connected to the generator system; a vacuum oil tank 200, the vacuum oil tank 200 is connected to the oil pipeline, a negative pressure is formed in the vacuum oil tank 200 and is used to separate the gas in the sealing oil; a separation device 300, the separation device 300 is connected to the oil pipeline, and is arranged upstream of the vacuum oil tank 200, the separation device 300 is connected to a first vacuum pump 610; and a connecting pipeline 400, the connecting pipeline 400 is used for gas flow, and is connected to the top of the separation device 300 and the top of the vacuum oil tank 200.

[0022] Through the above technical scheme, in the sealing oil purification system provided by the present disclosure, the separation device 300 is connected to the first vacuum pump 610, so that a negative pressure can be formed inside the separation device 300, so that when the sealing oil flows through the separation device 300, the negative pressure environment in the separation device 300 can cause the gas in the sealing oil to precipitate. In other words, the separation device 300 can improve the purity of the sealing oil. Similarly, the vacuum oil tank 200 can also improve the purity of the sealing oil. In addition, the separation device 300 is arranged upstream of the vacuum oil tank 200, so the separation device 300 can be used as a primary purification device for purifying the sealing oil, and the vacuum oil tank 200 can be used as a secondary purification device for purifying the sealing oil. In other words, the sealing oil purification system can purify the sealing oil twice, thereby ensuring the purity of the sealing oil. On this basis, since the connecting pipe 400 is connected to the top of the separation device 300 and the top of the vacuum oil tank 200, the connecting pipe 400 can connect the negative pressure environment in the vacuum oil tank 200 with the negative pressure environment in the separation device 300, so as to improve the vacuum degree of the vacuum oil tank 200 and the separation device 300, which has a lower vacuum degree, thereby improving the sealing oil purification effect of the sealing oil purification system. In summary, the sealing oil purification system can deliver high-purity sealing oil to the generator system, thereby ensuring the purity of hydrogen in the generator system, with good economy and high safety.

[0023] The top of the vacuum oil tank 200 may be connected to a second vacuum pump, which may be used to form a negative pressure in the vacuum oil tank 200 by vacuuming, so as to facilitate the separation of gas in the sealing oil. In addition, in an exemplary embodiment, the vacuuming capacity of the first vacuum pump 610 may be greater than the vacuuming capacity of the second vacuum pump, so that the gas in the vacuum oil tank 200 will flow to the separation device 300 through the connecting pipe 400 and be extracted by the first vacuum pump 610.

[0024] In addition, it should be noted that when the sealing oil purification system provided by the present application is not provided with the connecting pipeline 400, the hydrogen purity will decrease from 99.5% to 98% after the generator system has been running for 45 days. After adding the connecting pipeline 400, it was tested that the hydrogen purity of the generator system remained above 99% after 210 days of operation. It can be shown that the connecting pipeline 400 can significantly improve the purification effect of the sealing oil purification system on the sealing oil.

[0025] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 As shown in, the oil pipeline may include a main pipeline 110, a first branch pipeline 120 and a second branch pipeline 130. One end of the main pipeline 110 can be connected to an oil source, and the other end can be connected to one end of the first branch pipeline 120 and one end of the second branch pipeline 130. The other end of the first branch pipeline 120 can be connected to the second branch pipeline 130. The first branch pipeline 120 can be connected to a separation device 300, and the second branch pipeline 130 can be connected to a vacuum oil tank 200. The sealing oil purification system may also include a flow adapter 131, which can be connected to the second branch pipeline 130 and is used to adjust the amount of sealing oil in the second branch pipeline 130. In this way, through the flow adapter 131, it is possible to control all the sealing oil to flow to the second branch pipeline 130 through the first branch pipeline 120, that is, all the sealing oil can flow through the separation device 300 and the vacuum oil tank 200 in sequence, so as to purify the sealing oil twice through the separation device 300 and the vacuum oil tank 200, or a part of the sealing oil can flow to the second branch pipeline 130 through the first branch pipeline 120, and the other part can flow directly to the second branch pipeline 130. Alternatively, when the separation device 300 fails, the second switch valve (arranged at both ends of the first branch pipeline 120) on the first branch pipeline 120 can be closed to make all the sealing oil flow directly to the second branch pipeline 130 and be purified through the vacuum oil tank 200. Among them, the flow adapter 131 can be arranged on the second branch pipeline 130 between the two ends of the first branch pipeline 120, so that it can be ensured that the amount of sealing oil flowing from the first branch pipeline 120 to the second branch pipeline 130 will not be affected by the flow adapter 131. In actual use, the amount of sealing oil that flows directly to the second branch pipeline 130 can be allocated according to specific working conditions, and the present disclosure does not impose specific limitations on this.

[0026] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 As shown in , the oil pipeline may also include a first sub-pipeline 140 and a second sub-pipeline 150. Both the first sub-pipeline 140 and the second sub-pipeline 150 may be connected to the second branch pipeline 130 and the generator system. The first sub-pipeline 140 may be provided with a vacuum oil tank 200 and a first oil pump 141. The first oil pump 141 may be used to drive the sealing oil to flow to the generator system through the first sub-pipeline 140. In this way, the sealing oil may flow to the generator system via the second branch pipeline 130 and the first sub-pipeline 140, or the sealing oil may flow to the generator system via the second branch pipeline 130 and the second sub-pipeline 150. Among them, since a vacuum oil tank 200 is arranged on the first sub-pipeline 140, when the sealing oil flows to the generator system via the second branch pipe 130 and the first sub-pipeline 140, the sealing oil can flow through the vacuum oil tank 200. When the sealing oil flows to the generator system via the second branch pipe 130 and the second sub-pipeline 150, the sealing oil will not flow through the vacuum oil tank 200. In this way, when the vacuum oil tank 200 fails, the sealing oil can flow to the generator system via the second branch pipe 130 and the second sub-pipeline 150 to ensure that the sealing oil supply of the generator system is not affected.

[0027] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 As shown in , the oil delivery pipeline may also include a circulation pipeline 160, one end of which may be connected to the first sub-pipeline 140 and located downstream of the first oil pump 141, and the other end may be arranged in the vacuum oil tank 200 through an atomizing nozzle 161, and the atomizing nozzle 161 may be arranged on the top of the vacuum oil tank 200. In this way, the sealing oil purified by the vacuum oil tank 200 may flow directly to the generator system through the first sub-pipeline 140, or the sealing oil purified by the vacuum oil tank 200 may also flow partly directly to the generator system through the first sub-pipeline 140, and the other part may return to the vacuum oil tank 200 through the circulation pipeline 160 and the atomizing nozzle 161 for further purification, thereby further improving the purity of the sealing oil. Among them, one end of the circulation pipeline 160 may be connected to the first sub-pipeline 140 through a pressure regulating valve, so that the oil pressure flowing through the first oil pump 141 can be adjusted.

[0028] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1As shown in , the second sub-pipeline 150 may be provided with a second oil pump 151, and the second oil pump 151 may be used to drive the sealing oil to flow to the generator system through the second sub-pipeline 150. There may be two second sub-pipelines 150, and the two second sub-pipelines 150 may be arranged in parallel, so that when one of the second sub-pipelines 150 fails, the other second sub-pipeline 150 can be put into use to ensure that the generator system can be normally supplied with oil. In addition, the two second sub-pipelines 150 may be connected to a DC pump and an AC pump, respectively, so that when a sudden power outage occurs in the power plant, the external battery on the DC pump can continue to power the DC pump to further ensure that the generator system can be normally supplied with oil.

[0029] In addition, the sealing oil purification system may also include a pressure regulating pipeline, one end of the pressure regulating pipeline is connected to the second sub-pipeline 150 downstream of the second oil pump 151 through a pressure regulating valve, and the other end is connected to the second sub-pipeline 150 upstream of the second oil pump 151, so that the oil pressure flowing through the second oil pump 151 can be regulated.

[0030] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 As shown in , the first branch pipeline 120, the first sub-pipeline 140 and the second sub-pipeline 150 may be provided with a first switch valve 500. The first switch valve 500 may be constructed as a solenoid valve, so that the flow direction of the sealing oil in the oil pipeline can be controlled by controlling the opening and closing of the first switch valve 500 on the corresponding pipeline. Specifically, the sealing oil in the oil pipeline has the following flow directions.

[0031] Flow direction one: open the first switch valve 500 on the first branch pipeline 120 and the first sub-pipeline 140, and close the first switch valve 500 on the second sub-pipeline 150. In this way, the sealing oil can flow through the main pipeline 110, the first branch pipeline 120, the second branch pipeline 130 and the first sub-pipeline 140 in sequence, and finally flow to the generator system. At the same time, since the first branch pipeline 120 is connected to the separation device 300 and the first sub-pipeline 140 is connected to the vacuum oil tank 200, in flow direction one, the sealing oil can flow through the separation device 300 and the vacuum oil tank 200 in sequence, so as to purify the sealing oil twice through the separation device 300 and the vacuum oil tank 200 respectively. In this way, when the vacuum oil tank 200 and the separation device 300 can be used normally, the sealing oil can be provided to the generator system through flow path one.

[0032] Flow direction 2: Open the first switch valve 500 on the first sub-pipeline 140, and close the first switch valve 500 on the first branch pipeline 120 and the second sub-pipeline 150. In this way, the sealing oil can flow through the main pipeline 110, the second branch pipeline 130 and the first sub-pipeline 140 in sequence, and finally flow to the generator system. At the same time, since the first sub-pipeline 140 is connected to the vacuum oil tank 200, in flow direction 2, the sealing oil can flow through the vacuum oil tank 200 and be purified by the vacuum oil tank 200. In this way, when the separation device 300 fails and the vacuum oil tank 200 can be used normally, the sealing oil can be provided to the generator system through flow path 2.

[0033] Flow direction three: close the first switch valve 500 on the first sub-pipeline 140, and open the first switch valve 500 on the first branch pipeline 120 and the second sub-pipeline 150. In this way, the sealing oil can flow through the main pipeline 110, the first branch pipeline 120, the second branch pipeline 130 and the second sub-pipeline 150 in sequence, and finally flow to the generator system. At the same time, since the first branch pipeline 120 is connected to the separation device 300, in flow direction three, the sealing oil can flow through the separation device 300 and be purified by the separation device 300. In this way, when the vacuum oil tank 200 fails and the separation device 300 can be used normally, the sealing oil can be provided to the generator system through flow path three.

[0034] Flow direction four: open the first switch valve 500 on the second sub-pipeline 150, and close the first switch valves 500 on the first branch pipeline 120 and the first sub-pipeline 140. In this way, the sealing oil can flow through the main pipeline 110, the second branch pipeline 130 and the second sub-pipeline 150 in sequence, and finally flow to the generator system. Therefore, when both the vacuum oil tank 200 and the separation device 300 fail, the sealing oil can be provided to the generator system through flow path four.

[0035] In addition, a second switch valve may be provided at both ends of the first branch pipeline 120, at both ends of the first sub-pipeline 140, and at both ends of the second sub-pipeline 150. In this way, by controlling the corresponding second switch valve, the corresponding pipeline can be isolated separately to avoid the isolated pipeline from affecting other pipelines. Among them, the first switch valve 500 and the second switch valve on the first branch pipeline 120 and the first sub-pipeline 140 can be separately provided. In this way, the second switch valve on the first branch pipeline 120 and the first sub-pipeline 140 can be kept in a normally open state, and the opening and closing of the corresponding pipeline can be controlled by the first switch valve 500. When the separation device 300 or the vacuum oil tank 200 fails, the corresponding second switch valve on the first branch pipeline 120 or the first sub-pipeline 140 can be closed to isolate the first branch pipeline 120 or the first sub-pipeline 140 separately. In addition, the two second switch valves on the second sub-pipeline 150 can be used as the first switch valve on the second sub-pipeline 150. In this way, the two second switch valves on the second sub-pipeline 150 can be set to a normally closed state. When the vacuum oil tank 200 fails, the second switch valve on one of the second sub-pipelines 150 can be opened to ensure that the generator system can be normally supplied with oil.

[0036] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 As shown in the figure, the separation device 300 can have a separation tank 310 and an oil storage tank 320. The oil storage tank 320 can be connected to the separation tank 310 and arranged at the bottom of the separation tank 310. The separation tank 310 can be externally connected to a vacuum pipeline 600. The vacuum pipeline 600 can be provided with a first vacuum pump 610. The first vacuum pump 610 can be used to form a negative pressure in the separation tank 310 by vacuuming. The connecting pipeline 400 is connected to the vacuum pipeline 600. In this way, the first vacuum pump 610 can act on the separation tank 310 through the vacuum pipeline 600 to form a negative pressure in the separation tank 310, wherein the vacuum pipeline 600 also has the same negative pressure environment as the separation device 300. Therefore, connecting the connecting pipeline 400 to the vacuum pipeline 600 can not only ensure that the negative pressure environment in the vacuum pipeline 600 (that is, the negative pressure environment in the separation device 300) is connected to the negative pressure environment in the vacuum oil tank 200, but also prevent the sealing oil in the separation device 300 from accidentally entering the connecting pipeline 400, thereby affecting the connection effect of the connecting pipeline 400.

[0037] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1As shown in , the sealing oil purification system also includes a cooler 620 and a drain tank 630, which are sequentially arranged on the vacuum pipeline 600 along the gas flow direction, and an isolation valve 640 is also arranged on the vacuum pipeline 600 between the drain tank 630 and the cooler 620. Among them, the cooler 620 can condense the gas in the vacuum pipeline 600 so that the gas condenses into liquid, so that the output of the first vacuum pump 610 can be prevented from decreasing due to excessive gas discharged from the vacuum pipeline 600. In addition, the connecting pipeline 400 can be connected to the vacuum pipeline 600 upstream of the cooler 620, which can also prevent the gas in the connecting pipeline 400 from affecting the output of the first vacuum pump 610. In addition, the drain tank 630 can collect liquid in the vacuum pipeline 600. When the liquid in the drain tank 630 reaches a certain amount, the isolation valve 640 can be closed first, and then the third switch valve located downstream of the drain tank 630 (the third switch valve is arranged upstream of the two first vacuum pumps 610 in parallel) can be closed, and then the fourth switch valve located at the top of the drain tank 630 can be opened to connect the drain tank 630 to the external environment (that is, the air pressure in the drain tank 630 is atmospheric pressure at this time), and then the fourth switch valve at the bottom of the drain tank 630 can be opened to allow the sealing oil in the drain tank 630 to be discharged from the drain tank 630 under the action of its own weight. Among them, since the air pressure in the drain tank 630 is atmospheric pressure during the drain process, the isolation valve 640 and the third switch valve can be arranged to isolate the drain tank 630 separately to avoid the opening of the fourth switch valve from destroying the vacuum degree in the separation device 300, thereby ensuring the purification effect of the separation device 300 on the sealing oil.

[0038] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 As shown in , there are two first vacuum pumps 610, and the two first vacuum pumps 610 are arranged in parallel downstream of the sewage tank 630. In this way, when one of the first vacuum pumps 610 fails, the other first vacuum pump 610 can be put into use to ensure the vacuum degree in the separation tank 310, thereby ensuring the purification effect of the separation device 300 on the sealing oil.

[0039] In the sealing oil purification system provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 As shown in , the first branch pipeline 120 may be provided with a filter 121 and a third oil pump 122, the filter 121 may be arranged downstream of the separation device 300, and the third oil pump 122 may be connected to the first branch pipeline 120. In this way, the third oil pump 122 can drive the sealing oil to flow in the first branch pipeline 120, and when the sealing oil flows through the filter 121, the filter 121 can filter out impurities in the sealing oil to ensure the purity of the sealing oil.

[0040] During use of the sealing oil purification system provided by the present invention, the sealing oil from the oil source can first flow through the first branch pipeline 120, and the sealing oil can be subjected to primary purification by the separation device 300, wherein the sealing oil subjected to primary purification can flow through the filter 121, and the impurities in the sealing oil can be filtered out by the filter 121; thereafter, the sealing oil can continue to flow through the first sub-pipeline 140, and the sealing oil can be subjected to secondary purification by the vacuum oil tank 200; part of the sealing oil flowing out of the vacuum oil tank 200 can flow directly to the generator system via the first sub-pipeline 140, and another part of the sealing oil can re-enter the vacuum oil tank 200 via the circulation pipeline 160 for tertiary purification, and the sealing oil after tertiary purification will continue to flow to the first sub-pipeline 140.

[0041] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0043] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A sealing oil purification system, characterized in that: The sealing oil purification system comprises: An oil pipeline, wherein an oil inlet of the oil pipeline is connected to an oil source, and an oil outlet of the oil pipeline is connected to a generator system; A vacuum oil tank, the vacuum oil tank is connected to the oil pipeline, a negative pressure is formed in the vacuum oil tank and is used to separate the gas in the sealing oil; a separation device, the separation device being connected to the oil delivery pipeline and arranged upstream of the vacuum oil tank, the separation device being connected to a first vacuum pump; and A connecting pipeline is used for gas flow and is connected to the top of the separation device and the top of the vacuum oil tank.

2. The sealing oil purification system according to claim 1, characterized in that: The oil pipeline includes a main pipeline, a first branch pipeline and a second branch pipeline. One end of the main pipeline is connected to the oil source, and the other end is connected to one end of the first branch pipeline and one end of the second branch pipeline. The other end of the first branch pipeline is connected to the second branch pipeline. The first branch pipeline is connected to the separation device, and the second branch pipeline is connected to the vacuum oil tank. The sealing oil purification system also includes a flow adapter, which is connected to the second branch pipeline and is used to adjust the amount of sealing oil in the second branch pipeline.

3. The sealing oil purification system according to claim 2, characterized in that: The oil pipeline also includes a first sub-pipeline and a second sub-pipeline, the first sub-pipeline and the second sub-pipeline are both connected to the second branch pipeline and the generator system, the first sub-pipeline is provided with the vacuum oil tank and the first oil pump, the first oil pump is used to drive the sealing oil to flow to the generator system through the first sub-pipeline.

4. The sealing oil purification system according to claim 3, characterized in that: The oil delivery pipeline also includes a circulation pipeline, one end of which is connected to the first sub-pipeline and is located downstream of the first oil pump, and the other end is arranged in the vacuum oil tank through an atomizing nozzle, and the atomizing nozzle is arranged on the top of the vacuum oil tank.

5. The sealing oil purification system according to claim 3, characterized in that: The second sub-pipeline is provided with a second oil pump, and the second oil pump is used for driving the sealing oil to flow to the generator system through the second sub-pipeline.

6. The sealing oil purification system according to claim 3, characterized in that: The first branch pipeline, the first sub-pipeline and the second sub-pipeline are each provided with a first switch valve.

7. The sealing oil purification system according to any one of claims 1 to 6, characterized in that: The separation device comprises a separation tank and an oil storage tank, wherein the oil storage tank is connected to the separation tank and arranged at the bottom of the separation tank, the separation tank is externally connected to a vacuum pipeline, the vacuum pipeline is provided with the first vacuum pump, and the first vacuum pump is used to form a negative pressure in the separation tank by vacuuming, and the connecting pipeline is connected to the vacuum pipeline.

8. The sealing oil purification system according to claim 7, characterized in that: The sealing oil purification system also includes a cooler and a drain tank, which are arranged in sequence on the vacuum pipeline along the gas flow direction, and an isolation valve is also arranged on the vacuum pipeline between the drain tank and the cooler.

9. The sealing oil purification system according to claim 8, characterized in that: The number of the first vacuum pumps is two, and the two first vacuum pumps are arranged in parallel downstream of the sewage tank.

10. The sealing oil purification system according to claim 2, characterized in that: The first branch pipeline is provided with a filter and a third oil pump. The filter is arranged downstream of the separation device. The third oil pump is connected to the first branch pipeline.

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