Oil Product Recovery Quality Inspection System and Aviation Fuel Storage System

Abstract

The present application provides an oil product recovery quality inspection system and an aviation fuel storage system. The oil product recovery quality inspection system includes a main pipeline, a pump unit, a plurality of oil product quality inspection units, and an oil product recovery unit. The main pipeline includes an outlet end and a plurality of inlet ends. The inlet of the pump unit is connected to the outlet end. The plurality of oil product quality inspection units are used to be connected to corresponding storage tanks. The plurality of oil product quality inspection units are spaced along the main pipeline, and the outlet of the oil product quality inspection unit is connected to the inlet end. The oil product quality inspection unit is used to receive the oil product at the bottom of the storage tank for detection. The inlet of the oil product recovery unit is connected to the outlet of the pump unit, and the outlet of the oil product recovery unit is connected to the inlet end. The main pipeline is used to receive the oil product flowing out of the oil product quality inspection unit. The pump unit is used to transport the oil product in the main pipeline to the oil product recovery unit. The oil product recovery unit is used to recover and store the oil product. With such a setting, the layout of the pipeline is simplified and the cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of aviation fuel storage, and particularly to an oil product recovery quality inspection system and an aviation fuel storage system including the oil product recovery quality inspection system. Background Art

[0002] With the rapid economic development of our country, the aviation industry has also witnessed great development. Especially, the aviation fuel storage technology has shown a rapid growth trend. Generally, the aviation fuel storage technology refers to the oil product recovery technology. However, the requirements for the recovery of aviation fuel are also getting higher and higher. In the traditional oil product recovery system, the oil products at the bottoms of multiple storage tanks need to be recovered and stored separately through different recovery pipelines. Its pipeline distribution is intricate, occupying a large area, and requiring a large amount of manpower and material resources, thus resulting in high costs. Summary of the Invention

[0003] This application provides an improved oil product recovery quality inspection system and an aviation fuel storage system including the oil product recovery quality inspection system.

[0004] An embodiment of this application provides an oil product recovery quality inspection system, including:

[0005] A main pipeline, including an outlet end and a plurality of inlet ends;

[0006] An oil pump unit, the inlet of the oil pump unit is connected to the outlet end;

[0007] A plurality of oil product quality inspection units, used to be connected to corresponding storage tanks. The plurality of oil product quality inspection units are spaced apart along the main pipeline, and the outlet of the oil product quality inspection unit is connected to the inlet end. The oil product quality inspection unit is used to receive the oil products at the bottoms of the storage tanks for detection;

[0008] An oil product recovery unit, the inlet of the oil product recovery unit is connected to the outlet of the oil pump unit, the outlet of the oil product recovery unit is connected to the inlet end. The main pipeline is used to receive the oil products flowing out from the oil product quality inspection unit. The oil pump unit is used to transport the oil products in the main pipeline to the oil product recovery unit. The oil product recovery unit is used to recover and store the oil products.

[0009] Optionally, the oil product recovery quality inspection system further includes a recovery pipeline. The plurality of oil product quality inspection units are spaced apart on both sides of the main pipeline and are connected to the inlet end through the recovery pipeline.

[0010] Optionally, both the main pipeline and the recovery pipeline are arranged on the same horizontal plane.

[0011] Optionally, the setting position of the inlet of the oil pump unit is lower than the setting position of the outlet end.

[0012] Optionally, the oil recovery quality inspection system also includes a buffer pipeline, the inlet of the buffer pipeline is connected to the outlet end, the outlet of the buffer pipeline is connected to the inlet of the oil pump unit, and the setting position of the inlet of the buffer pipeline is lower than the setting position of the outlet end.

[0013] Optionally, the buffer pipeline includes a first end connected to the outlet end and a second end connected to the inlet of the oil pump unit, and the setting position of the second end is lower than the setting position of the first end.

[0014] Optionally, the oil recovery quality inspection system further includes a buffer tank, which is arranged at the outlet end, the buffer tank is arranged at a position lower than the main pipeline, and the oil pump unit is arranged in the buffer tank.

[0015] Optionally, the oil pump unit includes a pump, an inlet valve and an outlet valve, the inlet valve is connected between the inlet of the pump and the outlet end, and the outlet valve is connected between the outlet of the pump and the inlet of the oil recovery unit.

[0016] Optionally, the inlet valve remains in a normally open state; and / or

[0017] The outlet valve is not fully open.

[0018] Optionally, the oil pump unit further includes an exhaust valve, which is arranged between the outlet of the pump and the outlet valve.

[0019] Optionally, the exhaust valve comprises an automatic exhaust valve; and / or

[0020] The exhaust valve remains in a normally open state.

[0021] Optionally, the oil recovery unit includes a first oil recovery unit and a second oil recovery unit, the first oil recovery unit and the second oil recovery unit are connected in parallel between the outlet and the inlet end of the oil pump unit, and the oil quality of the oil recovered by the first oil recovery unit is higher than the oil quality of the oil recovered by the second oil recovery unit.

[0022] Optionally, the recovery pipeline includes a first recovery pipeline and a second recovery pipeline, the oil recovery unit includes a recovery tank and a first quality inspection tank, the recovery tank is connected to the outlet of the oil pump unit through the first recovery pipeline, and the first quality inspection tank is connected to the inlet end through the second recovery pipeline.

[0023] Optionally, the oil product recovery quality inspection system further includes a first magnetic flap level gauge disposed on the outer sidewall of the first quality inspection tank; the first magnetic flap level gauge includes a first float indicator, and the first float indicator floats up and down according to the liquid level change of the oil product in the first quality inspection tank to indicate the liquid level of the oil product.

[0024] Optionally, a first ball valve is provided on the second recovery pipeline, and the first ball valve is disposed downstream of the outlet of the first quality inspection tank.

[0025] Optionally, the recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline. The first quality inspection tank is connected to the treatment tank through the third recovery pipeline, and the first quality inspection tank is connected to the zero-level tank through the fourth recovery pipeline. The oil product quality of the oil product stored in the treatment tank is higher than the oil product quality of the oil product stored in the zero-level tank.

[0026] Optionally, a second ball valve is provided on the third recovery pipeline, and the second ball valve is disposed upstream of the inlet of the treatment tank; a third ball valve is provided on the fourth recovery pipeline, and the third ball valve is disposed upstream of the inlet of the zero-level tank.

[0027] Optionally, the installation position of the first ball valve is higher than the installation positions of the second ball valve and the third ball valve.

[0028] Optionally, a safety liquid level line is provided in the recovery tank, and the safety liquid level line does not exceed half of the height of the recovery tank; the oil product recovery quality inspection system further includes a plurality of spare tanks and a conveying pipeline. The spare tanks are connected to the recovery tank through the conveying pipeline, and the conveying pipeline is used to convey at least part of the oil product in the recovery tank to the spare tanks for storage when the oil product in the recovery tank exceeds the safety liquid level line.

[0029] Optionally, the recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline; the oil product quality inspection unit includes a second quality inspection tank. The second quality inspection tank is connected to the storage oil tank through the third recovery pipeline, and the second quality inspection tank is connected to the inlet end through the fourth recovery pipeline.

[0030] Optionally, the oil product recovery quality inspection system further includes a second magnetic flap level gauge disposed on the outer sidewall of the second quality inspection tank; the second magnetic flap level gauge includes a second float indicator, and the second float indicator floats up and down according to the liquid level change of the oil product in the second quality inspection tank to indicate the liquid level of the oil product.

[0031] Optionally, both the third recovery pipeline and the fourth recovery pipeline are disposed on the same horizontal plane.

[0032] Optionally, a fourth ball valve and a first automatic return valve are provided on the third recovery pipeline. The fourth ball valve is provided downstream of the outlet of the storage oil tank, and the first automatic return valve is provided upstream of the inlet of the second quality inspection tank. A fifth ball valve is provided on the fourth recovery pipeline, and the fifth ball valve is provided downstream of the outlet of the second quality inspection tank.

[0033] Optionally, the fourth ball valve remains open.

[0034] Optionally, the recovery pipeline includes a fifth recovery pipeline and a sixth recovery pipeline. The oil quality inspection unit includes a sampler. The sampler is connected to the third recovery pipeline through the fifth recovery pipeline, and the sampler is connected to the fourth recovery pipeline through the sixth recovery pipeline.

[0035] Optionally, both the fifth recovery pipeline and the sixth recovery pipeline are arranged on the same horizontal plane.

[0036] Optionally, the installation positions of the fifth recovery pipeline and the sixth recovery pipeline are not higher than the installation positions of the third recovery pipeline and the fourth recovery pipeline.

[0037] Optionally, a second automatic return valve is provided on the fifth recovery pipeline, and the second automatic return valve is provided upstream of the inlet of the sampler.

[0038] The present application also provides an aviation fuel storage system, including a plurality of storage oil tanks and the oil product recovery and quality inspection system described in any one of the above. The multiple oil quality inspection units of the oil product recovery and quality inspection system correspond to the multiple storage oil tanks.

[0039] According to the technical solution provided by the embodiment of the present application, it includes a main pipeline, a pump unit, a plurality of oil quality inspection units, and an oil product recovery unit. The plurality of oil quality inspection units are connected to the corresponding storage oil tanks, are spaced along the main pipeline, and receive the oil products at the bottom of the storage oil tanks for detection. The main pipeline is used to receive the oil products flowing out of the oil quality inspection units. The pump unit is used to transport the oil products in the main pipeline to the oil product recovery unit. The oil product recovery unit is used to recover and store the oil products. With such a setting, the plurality of oil quality inspection units discharge the oil products at the bottom of the plurality of storage oil tanks into the main pipeline, and uniformly transport the oil products in the main pipeline to the oil product recovery unit through the pump unit for recovery and storage, simplifying the pipeline layout and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The figure shows a schematic structural diagram of an embodiment of the aviation fuel storage system of the present application;

[0041] Figure 2 The figure shows a cross-sectional schematic diagram of a pump of the pump unit of the present application in an embodiment, where the magnetic reed switch of the pump is open;

[0042] Figure 3 Shown as Figure 2 Another cross-sectional schematic diagram of the pump of the oil pump unit shown, where the reed switch of the pump is closed;

[0043] Figure 4 Shown is a structural schematic diagram of another embodiment of the aviation fuel storage system of the present application;

[0044] Figure 5 Shown is a structural schematic diagram of yet another embodiment of the aviation fuel storage system of the present application. Detailed implementation manners

[0045] Here, exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0046] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meaning understood by those of ordinary skill in the field to which the present application belongs. The words such as "a" or "an" used in the specification and claims of the present application do not indicate a limitation in quantity, but rather indicate the existence of at least one. "Plurality" includes two, which is equivalent to at least two. The words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms of "a", "the" and "said" used in the specification and appended claims of the present application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0047] The oil product recovery and quality inspection system of the embodiment of the present application includes a main pipeline, a pump unit, a plurality of oil product quality inspection units, and an oil product recovery unit. Among them, the main pipeline includes an outlet end and a plurality of inlet ends. The inlet of the pump unit is connected to the outlet end. The plurality of oil product quality inspection units are used to be connected to corresponding storage tanks. The plurality of oil product quality inspection units are distributed at intervals along the main pipeline, and the outlet of the oil product quality inspection unit is connected to the inlet end. The oil product quality inspection unit is used to receive the oil products at the bottom of the storage tank for detection. The inlet of the oil product recovery unit is connected to the outlet of the pump unit, and the outlet of the oil product recovery unit is connected to the inlet end. The main pipeline is used to receive the oil products flowing out of the oil product quality inspection unit. The pump unit is used to transport the oil products in the main pipeline to the oil product recovery unit. The oil product recovery unit is used to recover and store the oil products.

[0048] With such an arrangement, a plurality of oil product quality inspection units are arranged in the main pipeline, and the oil products in the main pipeline are uniformly transported to the oil product recovery unit for recovery and storage through the pump unit. Compared with the related art, the recovery cycle is shortened, manpower and time are reduced, and the layout of the pipeline is simplified, reducing costs.

[0049] The present application provides an aviation fuel storage system, which includes a plurality of storage tanks and an oil product recovery and quality inspection system. The plurality of oil product quality inspection units of the oil product recovery and quality inspection system correspond to the plurality of storage tanks. In some embodiments, the aviation fuel storage system is used for quality inspection and recycling of civil aviation fuel. The oil product recovery and quality inspection system can detect and recycle the oil products stored at the bottom of the storage tank again. By connecting the plurality of storage tanks to the oil product recovery and quality inspection system, the oil products at the bottom of the plurality of storage tanks are discharged into the main pipeline through the plurality of oil product quality inspection units, and the oil products in the main pipeline are uniformly transported to the oil product recovery unit for recovery and storage. Compared with the related art, the layout of the pipeline is simplified and the cost is reduced.

[0050] Figure 1 The figure shows a schematic structural diagram of an embodiment of the aviation fuel storage system 200 of the present application. The aviation fuel storage system 200 includes a plurality of storage tanks 50 and an oil product recovery and quality inspection system 100. As Figure 1As shown, the oil product recovery quality inspection system 100 includes multiple oil quality inspection units 10, a main pipeline 20, a pump unit 30, and an oil product recovery unit 40. The multiple oil quality inspection units 10 are connected to the same pump unit 30 through the main pipeline 20. In some embodiments, the main pipeline 20 includes an outlet end 21 and multiple inlet ends 22. The main pipeline 20 includes a pipe body, and the multiple inlet ends 22 are provided on the pipe wall of the pipe body. They can be provided at one end of the pipe body far from the outlet end 21 (which can also be understood as the end opposite to the outlet end 21). The main pipeline 10 is used to receive the oil products flowing out from the oil quality inspection unit 30. The oil products here can be aviation kerosene, abbreviated as "aviation fuel". In some other embodiments, the oil products can be other fuels, and the present application is not limited thereto. In some embodiments, the inlet of the pump unit 30 is connected to the outlet end 21, and the pump unit 30 is used to transport the oil products in the main pipeline 10 to the oil product recovery unit 40. In this embodiment, the pump unit 30 can be a self-priming centrifugal pump. In some other embodiments, the pump unit 30 can be other types of pumps, and the present application is not limited thereto. In some embodiments, the multiple oil quality inspection units 10 are used to connect to corresponding storage tanks 50. The multiple oil quality inspection units 10 are spaced along the main pipeline 20, and the outlet of the oil quality inspection unit 10 is connected to the inlet end 22. The oil quality inspection unit 10 is used to receive the oil products at the bottom of the storage tank 50 for detection. The storage tank 50 here refers to an oil tank. The volume of the oil tank is huge. To ensure safety and compliance with national standards, the multiple storage tanks 50 are spaced apart from each other, and the distance between two adjacent storage tanks 50 is not less than half of the sum of the heights of the two storage tanks 50. For example, in this embodiment, the height of the storage tank 50 is 18 meters. Then, in the direction along the main pipeline 20, the distance between two storage tanks 50 is not less than 18 meters, so as to ensure safety and compliance with national standards. Therefore, spacing the multiple oil quality inspection units 10 along the main pipeline 20 meets national standards and ensures safety.

[0051] In some embodiments, the inlet of the oil recovery unit 40 is connected to the outlet of the oil pump unit 30, and the outlet of the oil recovery unit 40 is connected to the inlet end 22. The oil recovery unit 40 is used for recovering and storing oil products. On the one hand, the oil recovery unit 40 is used to recover oil products with high quality. For example, it needs to be tested before being reused again and can be reused when the test is qualified. On the other hand, it is used to store oil products with low quality, which can be used for other treatments. With such an arrangement, the oil products at the bottom of the storage tank 50 can be fully utilized, and the oil products at the bottom of the storage tank 50 can be recycled regularly, thereby improving the quality of the oil products in the storage tank 50. The oil products at the bottom of multiple storage tanks 50 are discharged into the main pipeline 20 through multiple oil quality inspection units 10, and the oil products in the main pipeline 20 are uniformly transported to the oil recovery unit 40 for recovery and storage through the oil pump unit 30, which simplifies the pipeline layout, reduces costs, and because the amount of oil products used for quality inspection discharged from the bottom of each storage tank 50 into the corresponding oil quality inspection unit 10 is relatively small, the oil products discharged from the bottoms of multiple storage tanks 50 are aggregated and recycled uniformly, which can shorten the recovery cycle and reduce manpower and time.

[0052] In some embodiments, multiple oil quality inspection units 10 can be provided (for example, 3 or more). The multiple oil quality inspection units 10 are spaced apart and distributed on both sides of the main pipeline 20. With such an arrangement, the areas on both sides of the main pipeline 20 can be effectively utilized, so that the multiple oil quality inspection units 10 are evenly distributed, reducing the floor area, simplifying the pipeline distribution, and reducing costs. In some embodiments, the oil recovery quality inspection system 100 further includes a recovery pipeline 60. The multiple oil quality inspection units 10 are connected to the inlet end 22 through the recovery pipeline 60. The multiple oil quality inspection units 10 are connected to the inlet end 22 through the recovery pipeline 60 in a aggregated manner, reducing the laying quantity of the main pipeline 20 and the floor area occupied by the main pipeline 20, thereby simplifying the pipeline distribution and reducing costs.

[0053] In this embodiment, the storage tank 50 is a conical bottom tank (as Figure 1 shown). By utilizing the static pressure generated by the conical bottom tank (the static pressure generated by this conical bottom tank is very large and the generated pressure is also very large), and by arranging both the main pipeline 20 and the recovery pipeline 60 on the same horizontal plane, the moisture and impurities at the bottom of the storage tank 50 are facilitated to be discharged, thereby improving the recovery efficiency. In addition, since the entire system occupies a large area, by arranging both the main pipeline 20 and the recovery pipeline 60 horizontally and on the same horizontal plane, with such an arrangement, the construction complexity can be reduced, thereby reducing costs. In some other embodiments, the main pipeline 20 and the recovery pipeline 60 may not be on the same horizontal plane.

[0054] In some embodiments, the oil pump unit 30 includes a self-priming centrifugal pump, and the self-priming centrifugal pump can send out the oil due to the centrifugal force. In some embodiments, the oil pump unit 30 includes a pump 31, an inlet valve 32 and an outlet valve 33. The inlet valve 32 is connected between the inlet and outlet ends 21 of the pump 31, and the outlet valve 33 is connected between the outlet of the pump 31 and the inlet of the oil recovery unit 40. In order to ensure that the oil discharged from the outlet end 21 can be completely discharged into the pump 31, the inlet size of the pump 31 is adapted to the size of the outlet end 21. Before the oil pump unit 30 works, the pump 31 must be filled with oil to form a vacuum state. When the impeller rotates rapidly, the blades cause the oil to rotate quickly. The rotating oil flies out of the impeller under the action of centrifugal force. After the oil in the pump 31 is thrown out, a vacuum area is formed in the central part of the impeller. The oil in the main pipeline 20 is pressed into the oil recovery system 40 through the recovery pipeline 60 under the action of atmospheric pressure or oil pressure. Such a cyclic operation can realize continuous oil pumping. It should be noted that the self-priming centrifugal pump must be started after the pump 31 is filled with oil before starting, otherwise the pump 31 will heat up, vibrate, and reduce the amount of oil, causing damage to the oil pump unit 30 and equipment accidents. Therefore, the setting position of the inlet of the oil pump unit 30 is lower than the setting position of the outlet end 21, and the inlet valve 32 is kept in a normally open state, so that the inlet of the oil pump unit 30 (pump 31) is kept filled with oil before starting, so that the oil pump unit 30 (pump 31) can work normally. Further, in order to ensure that the pump 31 can smoothly transport the oil in the main line 20 to the oil recovery system 40, the outlet valve 33 is not fully opened. For example, the opening of the outlet valve 33 is opened to no more than one-fourth, which can increase the conveying pressure and the conveying speed, so that the oil in the main line 20 and the recovery line 60 can be quickly recovered to the oil recovery system 40. It should be noted that the opening of the outlet valve 33 is determined according to the model (rated voltage / current) of the pump 31. When the pump 31 is used, opening the outlet valve 33 to one-fourth of the outlet valve 33 opening will generate pressure, and this generated pressure can press the oil in the main line 20 into the oil recovery system 40. If the outlet valve 33 is opened too much, it will generate very strong pressure. For example, when the pressure is too high or the load is too high at the beginning, the rated voltage / current of the pump 31 is reached in an instant, which can easily burn the pump 31. Therefore, when the pump 31 is just started, the outlet valve 33 is not set to be fully opened. For example, the outlet valve 33 is opened to no more than one-fourth. On the one hand, the pressure generated is sufficient, and on the other hand, it will not have side effects on the pump 31 itself.

[0055] Figure 2 FIG. 1 is a cross-sectional schematic diagram of an embodiment of a pump 31 of an oil pump assembly 30 of the present application, wherein a reed switch 311 of the pump 31 is turned on; Figure 3 Shown Figure 2Another cross-sectional schematic diagram of the pump 31 of the oil pump unit 30 shown, in which the reed switch 311 of the pump 31 is closed. In some embodiments, the oil pump unit 30 includes an automatic mode. In combination with Figure 2 and Figure 3 shown, a float switch is provided in the pump 31. The float switch includes a reed switch 311 and a float 312 provided on the reed switch 311. The reed switch 311 is electrically connected to an external power switch. In some embodiments, the reed switch 311 includes two magnetizable reed pieces 313 (usually composed of two metals, iron and nickel) and a magnet 314 sleeved inside the float 312. The magnet 314 can be a permanent magnet or an electromagnetic coil. The two reed pieces 313 are sealed in a glass tube, and the function of the reed pieces 313 is equivalent to a magnetic flux conductor. As Figure 2 shown, before operation, the two reed pieces 313 do not contact. As Figure 3 shown, when passing through the magnetic field generated by the magnet 314, the externally applied magnetic field generates different polarities near the end positions of the two reed pieces. When the magnetic force exceeds the elastic force of the reed pieces 313 themselves, the two reed pieces 313 will attract and conduct the circuit. When the magnetic field weakens or disappears, the reed pieces 313 are released due to their own elasticity, and the two reed pieces 313 will separate to open the circuit. In this embodiment, when the water level in the pump 31 rises, the float 312 drives the magnet 314 to rise. Under the action of the externally applied magnetic field, the two reed pieces 313 attract and the power switch is turned on, and at this time the pump 31 is started; when the water level in the pump 31 drops, the float 312 drives the magnet 314 to drop. After the magnetic field weakens or disappears, the reed pieces 313 are released due to their own elasticity, and at this time the pump 31 is turned off. Compared with the related art, the pump 31 of the oil pump unit 30 can realize automatic oil pumping and automatic shutdown without real-time monitoring by staff. With such a setting, a large amount of manpower is reduced. And, in this embodiment, only one oil pump unit 30 is required to provide power to recover the oil collected in the main pipeline 20 into the oil recovery unit 40. Compared with the related art, the number of oil pump units 30 is reduced and the cost is lowered. And, when the liquid level in the float switch reaches a certain height, the reed switch 311 closes and the pump 31 can be started. If an oil quality inspection unit 10 of each storage tank 50 is connected to an oil pump assembly 30, because the amount of oil is small, the pumped oil is less, and the oil remaining in the recovery pipeline 60 of the oil quality inspection unit 10 is more. The oil discharged from the bottoms of multiple storage tanks 50 flows into the main pipeline 50, so that the total amount of oil flowing into the inlet of the pump 31 is more. When unified and summarized, the liquid level in the float switch is higher, the closing time of the reed switch 311 of the float switch is longer, and the oil pumped by the pump 31 is more.

[0056] It should be noted that when oil needs to be recovered, the staff needs to turn on the main power supply of the power distribution cabinet connected to the pump 31, and put the control mode of the pump 31 into the automatic mode. When the oil in the main line 20 flows into the pump 31, and the float 312 drives the permanent magnet or electromagnetic coil 314 to rise and the two reeds 313 are attracted, it can be started to discharge the oil into the oil recovery unit 40. When the amount of oil in the main line 20 flowing into the pump 31 gradually decreases, and the float 312 drives the permanent magnet or electromagnetic coil 314 to descend, after the magnetic field weakens or disappears, the two reeds 313 are released, thereby ending the recovery. When the recovery is completed, turn off the main power supply of the power distribution cabinet, put the control mode of the pump 31 into the intermediate mode, and close the outlet valve 33 of the pump 31. The intermediate mode here can be a non-automatic mode, which is not limited to this in the present application.

[0057] In some embodiments, the oil pump unit 30 further includes an exhaust valve 34, which is disposed between the outlet of the pump 31 and the outlet valve 33. The exhaust valve 34 is used to remove the air in the pump 31 to ensure that the oil delivered by the outlet valve 34 is free of air. In some embodiments, the exhaust valve 34 includes an automatic exhaust valve. In some embodiments, a float switch (not shown) is disposed in the exhaust valve 34, and the exhaust valve 34 is kept in a normally open state. When the pump 31 is just started, the oil in the pump 31 is not fully discharged, and some air is discharged through the exhaust valve 34 (generally, the air is discharged upward). Then, as the oil level rises, when the oil in the pump 31 is fully discharged, that is, the float switch reaches the upper limit of the liquid level, at this time, the exhaust valve 34 is automatically closed without the need for human operation, which is simple and quick.

[0058] Figure 4 The structure diagram of another embodiment of the aviation fuel storage system 200 of the present application is shown. In this embodiment, the oil pump unit 30 adopts a self-priming centrifugal pump, in order to ensure that the inlet of the oil pump unit 30 is filled with oil before starting. Figure 4As shown, the oil product recovery quality inspection system 100 further includes a buffer pipeline 23. The inlet of the buffer pipeline 23 is connected to the outlet end 21, and the outlet of the buffer pipeline 23 is connected to the inlet of the oil pump unit 30. The setting position of the inlet of the buffer pipeline 23 is lower than the setting position of the outlet end 21, so that there is a topographic difference between the inlet of the oil pump unit 30 and the outlet end 21 of the main pipeline 20, and the inlet of the pump 31 is filled with oil as much as possible. Because the pump 31 can only be started when the liquid level in it reaches a certain height. If each oil quality inspection unit 10 of the storage tank 50 is connected to an oil pump assembly 30, due to less oil, the pump 31 cannot be started. And when the pump 31 can be started, less oil is pumped out and more oil remains in the recovery pipeline 60 of the oil quality inspection unit 10. If the oil products discharged from the bottoms of multiple storage tanks 50 flow into the main pipeline 50, the total amount of oil flowing into the inlet of the pump 31 is larger. When aggregated together, the liquid level in the pump 31 is higher, so that the inlet of the pump 31 is filled with oil as much as possible, ensuring normal startup. In addition, more oil can be pumped out through unified recovery. Moreover, the fact that the setting position of the inlet of the buffer pipeline 23 is lower than the setting position of the outlet end 21 can also ensure that the oil in the main pipeline 20 is more easily discharged.

[0059] In some embodiments, the buffer pipeline 23 includes a first end 231 connected to the outlet end 21 and a second end 232 connected to the inlet of the oil pump unit 30. The setting position of the second end 232 is lower than that of the first end 231. Since the amount of oil discharged from the bottom of each storage tank 50 into the corresponding oil quality inspection unit 10 is relatively small, and the setting position of the second end 232 is lower than that of the first end 231, that is, there is a topographical difference between the second end 232 and the first end 231, resulting in a topographical difference between the inlet of the oil pump unit 30 connected to the second end 232 and the outlet end 21 of the main pipeline 20 connected to the first end 231, so that the inlet of the pump 31 is filled with oil as much as possible. Because the pump 31 can only be started when the liquid level inside reaches a certain height. If each oil quality inspection unit 10 of the storage tank 50 is connected to an oil pump assembly 30, due to the small amount of oil, the pump 31 cannot be started. And when the pump 31 can be started, the amount of oil pumped out is small, and there is more oil left in the recovery pipeline 60 of the oil quality inspection unit 10. If the oil discharged from the bottoms of multiple storage tanks 50 flows into the main pipeline 50, the total amount of oil flowing into the inlet of the pump 31 is relatively large. When aggregated together, the liquid level in the pump 31 is relatively high, thus ensuring that the inlet of the pump 31 is filled with oil as much as possible, ensuring normal startup, and enabling more oil to be pumped out through unified recovery. Additionally, the topographical difference between the inlet of the oil pump unit 30 connected to the second end 232 and the outlet end 21 of the main pipeline 20 connected to the first end 231 can also ensure that the oil in the main pipeline 20 is more easily discharged. In some embodiments, the pipe diameter of the first end 231 of the buffer pipeline 23 matches that of the outlet end 21, and the pipe diameter of the second end 232 of the buffer pipeline 23 matches the size of the inlet of the oil pump unit 30 (pump 31). In some embodiments, the first end 231 of the buffer pipeline 23 can be on the same horizontal plane as the outlet end 21, and the setting position of the second end 232 of the buffer pipeline 23 is lower than that of the first end 231 of the buffer pipeline 23, resulting in a topographical difference between the inlet of the oil pump unit 30 and the outlet end 21 of the main pipeline 20, so that the inlet of the pump 31 is filled with oil, ensuring normal startup. In some other embodiments, the first end 231 of the buffer pipeline 23 is inclined and can have a preset angle with the outlet end 21. The second end 232 of the buffer pipeline 23 can be horizontally arranged and its setting position is lower than that of the outlet end 21, resulting in a topographical difference between the inlet of the oil pump unit 30 and the outlet end 21 of the main pipeline 20, so that the inlet of the pump 31 is filled with oil, ensuring normal startup.

[0060] Figure 5 The structural schematic diagram of yet another embodiment of the aviation fuel storage system 200 of the present application is shown. As Figure 5As shown, the oil recovery quality inspection system 100 includes a buffer tank 24, which is arranged at the outlet end 21. By setting the buffer tank 24 at a position lower than the main pipeline 20, and setting the oil pump unit 30 in the buffer tank 24 (at Figure 5 In the embodiment shown, the pump 31 and the inlet valve 32 are arranged in the buffer tank 24 to ensure that the inlet of the pump 31 is filled with oil as much as possible. The pipeline connected to the inlet valve 32 connected to the inlet of the pump 31 extends along the wall of the buffer tank 24 (such as Figure 5 As shown), since the amount of oil discharged from the bottom of each oil storage tank 50 into the corresponding oil quality inspection unit 10 is relatively small, by arranging the oil pump unit 30 in a buffer tank 24 with relatively low terrain, there is a terrain difference between the inlet of the oil pump unit 30 (pump 31) and the outlet end 21 of the main pipeline 20. On the one hand, the oil discharged from the bottom of multiple oil storage tanks 50 can be better aggregated and uniformly flowed into the main pipeline 50, ensuring that the inlet of the pump 31 is filled with as much oil as possible to ensure normal startup. On the other hand, the oil in the main pipeline 20 can be discharged smoothly.

[0061] In some embodiments, the oil recovery unit 40 includes a first oil recovery unit 40a and a second oil recovery unit 40b, the first oil recovery unit 40a and the second oil recovery unit 40b are connected in parallel between the outlet and the inlet end 22 of the oil pump unit 30, and the oil quality of the oil recovered by the first oil recovery unit 40a is higher than the oil quality of the oil recovered by the second oil recovery unit 40b. When the oil is recovered, the clean oil is discharged into the first oil recovery unit 40a, and the oil with lower quality or water or impurities is discharged into the second oil recovery unit 40b. Such a setting can effectively classify and process oils of different qualities to avoid waste of oil. For example, clean oil can be tested again and can be recycled if it meets the oil quality requirements. Oil with lower quality or containing moisture or impurities can be treated in other ways. For example, it can be discharged into a water-oil separation tank or a dirty oil tank or the bottom of the oil tank can be drained. The specific measures taken can be selected according to the actual quality of the oil and are not limited in this application.

[0062] It should be noted that the first oil recovery unit 40a and the second oil recovery unit 40b have the same structure. Figure 1 The same reference numerals are used in the illustrated embodiments and will not be described in detail herein.

[0063] In some embodiments, the recovery pipeline 60 includes a first recovery pipeline 61 and a second recovery pipeline 62. The oil product recovery unit 40 includes a recovery tank 41 and a first quality inspection tank 42. The recovery tank 41 is connected to the outlet (outlet valve 33) of the oil pump unit 30 through the first recovery pipeline 61, and the first quality inspection tank 42 is connected to the inlet end 21 through the second recovery pipeline 62. The recovery tank 41 is used to recover the oil products discharged by the pump 31. To prevent microbial contamination, the first quality inspection tank 42 conducts a discharge inspection on the oil products in the recovery tank 41. In some embodiments, the oil product recovery quality inspection system 100 further includes a first magnetic flap level gauge 43, which is provided on the outer side wall of the first quality inspection tank 42. The first magnetic flap level gauge 43 includes a first float indicator 431. The first float indicator 431 floats up and down according to the liquid level change of the oil products in the first quality inspection tank 42 to indicate the liquid level of the oil products, so as to avoid the overflow of the oil products flowing into the first quality inspection tank 42 through the first float indicator 431.

[0064] In some embodiments, a first ball valve 621 is provided on the second recovery pipeline 62, and the first ball valve 621 is provided downstream of the outlet of the first quality inspection tank 42. Before the discharge inspection, the first ball valve 621 is in the closed state. To prevent the oil products remaining in the first quality inspection tank 42 (such as oil products with low quality) from being discharged into the main pipeline 20, it is opened before the recovery discharge is required and closed when the recovery discharge is not required, so as to avoid mixing with clean oil products and avoid waste. In some embodiments, the recovery pipeline 60 includes a third recovery pipeline 63 and a fourth recovery pipeline 64. The first quality inspection tank 42 is connected to the treatment tank 44 through the third recovery pipeline 63, and the first quality inspection tank 42 is connected to the zero-level tank 45 through the fourth recovery pipeline 64. The oil quality of the oil products stored in the treatment tank 44 is higher than that of the oil products stored in the zero-level tank 45. Since the oil quality inspection unit 10 receives the oil products at the bottom of the storage tank 50, after a long time of sedimentation, it will contain some moisture or impurities, and is discharged into the recovery tank 41 through the main pipeline 20 and the oil pump unit 30 in sequence. Therefore, most of the oil products recovered in the recovery tank 41 contain moisture or impurities. Therefore, the first quality inspection tank 42 receives the oil products in the recovery tank 41 again for classification treatment. For example, they are respectively discharged into the treatment tank 44 and the zero-level tank 45 with different oil qualities, so as to avoid waste of oil products. Here, the treatment tank 44 can be an oil pollution treatment tank, and the zero-level tank 45 can be an underground dirty oil tank, and the oil quality of the oil products stored therein is lower than that of the oil products stored in the oil pollution treatment tank.

[0065] In some embodiments, a second ball valve 631 is provided on the third recovery pipeline 63, and the second ball valve 631 is provided upstream of the inlet of the treatment tank 44. Since the second ball valve 631 is provided at the bottom of the first quality inspection tank 42, before inspection and discharge, the second ball valve 631 is in a closed state to prevent the oil product (such as clean oil product) retained in the first quality inspection tank 42 from being discharged into the treatment tank 44. Therefore, it is opened before the required recovery and discharge to prevent the clean oil product from being mixed into the treatment tank 44 and avoid waste. In some embodiments, a third ball valve 641 is provided on the fourth recovery pipeline 64, and the third ball valve 641 is provided upstream of the inlet of the zero-level tank 45. Since the third ball valve 641 is provided at the bottom of the first quality inspection tank 42, before inspection and discharge, the third ball valve 641 is in a closed state to prevent the oil product (such as clean oil product) retained in the first quality inspection tank 42 from being discharged into the zero-level tank 45. Therefore, it can be opened before the required recovery and discharge to prevent the clean oil product from being mixed into the zero-level tank 45 and avoid waste. In some embodiments, the installation position of the first ball valve 621 is higher than the installation positions of the second ball valve 631 and the third ball valve 641. Since in the mixed oil product (here the mixed oil product refers to the oil product containing moisture or impurities), some impurities or water settle at the bottom, the second ball valve 631 and the third ball valve 641 are provided at the bottom of the first quality inspection tank 42, and the installation position of the first ball valve 621 is higher than the installation positions of the second ball valve 631 and the third ball valve 641, so that the moisture or impurities in the first quality inspection tank 42 can be discharged more easily.

[0066] In some embodiments, a safety liquid level line is provided in the recovery tank 41, and the safety liquid level line does not exceed half of the height of the recovery tank 41. In this embodiment, the height of the recovery tank 41 is 8 meters, and the safety liquid level line does not exceed half of the height of the recovery tank 41, that is, it shall not exceed 4 meters. In this embodiment, the safety liquid level line is set to 3.5 meters, leaving more than half of the space to handle the recovery of oil products in case of emergency. In some embodiments, the oil product recovery and quality inspection system 100 further includes a plurality of spare tanks 70 and a conveying pipeline 80. The spare tanks 70 are connected to the recovery tank 41 through the conveying pipeline 80. The conveying pipeline 80 is used to convey at least part of the oil product in the recovery tank 41 to the spare tanks 70 for storage when the oil product in the recovery tank 41 exceeds the safety liquid level line. In this embodiment, for example, when the oil product in the recovery tank 41 exceeds 3.5 meters, the recovered oil product will be conveyed through the conveying pipeline 80 to the empty spare tank 70 for storage. When it is reused, it needs to be detected again whether it meets the standard, and it can be reused only when the detection reaches the standard. This is used as a cyclic recovery and utilization to avoid waste of oil products.

[0067] In some embodiments, the recovery pipeline 60 includes a third recovery pipeline 65 and a fourth recovery pipeline 66; the oil quality inspection unit 10 includes a second inspection tank 11, the second inspection tank 11 is connected to the storage tank 50 through the third recovery pipeline 65, and the second inspection tank 11 is connected to the inlet end 21 through the fourth recovery pipeline 66. The second inspection tank 11 is used to store the oil product at the bottom of the storage tank 50. Since there is a certain distance between the recovery pipeline 60 (the third recovery pipeline 65) connecting the second inspection tank 11 and the storage tank 50, it is necessary to discharge a part of the oil product at the bottom of the storage tank 50 into the second inspection tank 11 (wherein, this part of the oil product includes the oil product in the third recovery pipeline 65 connecting the second inspection tank 11 and the storage tank 50), and then conduct subsequent detection. Such a setting makes the subsequent detection results more accurate. In some embodiments, the oil product recovery and quality inspection system 100 further includes a second magnetic flap level gauge 12, which is arranged on the outer side wall of the second inspection tank 11; the second magnetic flap level gauge 12 includes a second float indicator 121, and the second float indicator 121 floats up and down according to the liquid level change of the oil product in the second inspection tank 11 to indicate the liquid level of the oil product. A constant scale line (for example, 70L - 90L, preferably 80L) is provided in the second inspection tank 11. When inspection is required, first open the lid of the second inspection tank 11, observe the liquid level of the oil product in the second inspection tank 11, and at the same time, the second float indicator 121 rises as the liquid level rises. Observe whether the liquid level in the second inspection tank 11 reaches the constant scale line through the indication of the second float indicator 121, which is convenient for the staff to observe and avoids the oil product flowing into the second inspection tank 11 from overflowing by observing the second float indicator 121.

[0068] In this embodiment, the storage tank 50 is a conical bottom tank (such as Figure 1As shown in the figure, by utilizing the static pressure generated by the cone-bottom tank, the third recovery pipeline 65 and the fourth recovery pipeline 66 are both arranged at the same horizontal plane, so that the moisture and impurities at the bottom of the oil storage tank 50 are easily discharged. In addition, since the entire system occupies a large area, by arranging the third recovery pipeline 65 and the fourth recovery pipeline 66 at the same horizontal plane, the construction difficulty can be reduced, thereby reducing the cost. In some embodiments, the third recovery pipeline 65 is provided with a fourth ball valve 651 and a first automatic return valve 652, and the fourth ball valve 651 is arranged downstream of the outlet of the oil storage tank 50. In some embodiments, the fourth ball valve 651 is kept in a normally open state. Such a setting can keep the oil in the third recovery pipeline 65. When testing is required, the first automatic return valve 652 needs to be opened to allow the oil in the oil storage tank 50 to flow into the second quality inspection tank 11. At this time, the pressure of the oil received by the first automatic return valve 652 is slowly released, rather than increasing instantly, thereby protecting the second quality inspection tank 11. Because in this embodiment, the oil storage tank 50 adopts a cone bottom tank, which will generate a strong static pressure. If the fourth ball valve 651 is kept in a closed state and opened only when testing is required, a large pressure will be generated at this time, causing too much pressure on the third recovery pipeline 65 and the second quality inspection tank 11. Therefore, in order to avoid safety hazards, the fourth ball valve 651 is kept in a normally open state first, which can relieve the static pressure generated at the bottom of the oil storage tank 50, thereby improving safety. In some embodiments, the first automatic return valve 652 is arranged upstream of the inlet of the second quality inspection tank 11. The first automatic return valve 652 is opened when testing is required, and is automatically closed when the oil in the second quality inspection tank 11 reaches the constant scale line, without the need for staff operation, which is convenient and quick. In some embodiments, a fifth ball valve 661 is provided on the fourth recovery pipeline 66, and the fifth ball valve 661 is provided downstream of the outlet of the second quality inspection tank 11. It is opened when the oil in the second quality inspection tank 11 needs to be discharged. In order to prevent the oil remaining in the second quality inspection tank 11 (for example, oil of low quality) from being discharged to the main pipeline 20, it can be opened before recovery and discharge is required to avoid mixing with clean oil and avoid waste.

[0069] In some embodiments, the recovery pipeline 60 includes a fifth recovery pipeline 67 and a sixth recovery pipeline 68; the oil quality inspection unit 10 includes a sampler 13. The sampler 13 is connected to the third recovery pipeline 65 through the fifth recovery pipeline 67, and the sampler 13 is connected to the fourth recovery pipeline 66 through the sixth recovery pipeline 68. In this embodiment, the sixth recovery pipeline 68 is connected to the fourth recovery pipeline 66 and converges at the same point, and then is connected to the inlet end 22 of the main pipeline 20, which can reduce the number of inlet ends 22 provided on the main pipeline 20. In addition, the sixth recovery pipeline 68 and the fourth recovery pipeline 66 converge and are assembled at the same point, which is convenient for assembly and maintenance. In some embodiments, a quality inspection scale line is provided in the sampler 13 (for example, at the four-fifths position of the sampling area of the sampler). When detection is required, the sampler 13 is filled with oil up to the quality inspection scale line and then observed. Mainly visually inspect whether the oil contains free water, suspended water and solid impurities. If the moisture content cannot be determined by visual inspection, a water detector can be further used to check whether the oil contains moisture (for the quality inspection of the currently used and spare tanks or the random inspection of the storage tank quality, a water detector must be used to check the moisture content of the oil).

[0070] In this embodiment, the storage tank 50 is a conical bottom tank (as Figure 1 shown). By utilizing the static pressure generated by the conical bottom tank and arranging both the fifth recovery pipeline 67 and the sixth recovery pipeline 66 at the same horizontal plane, the moisture and impurities at the bottom of the storage tank 50 can be easily discharged. In addition, since the entire system occupies a large area, by arranging both the third recovery pipeline 65 and the fourth recovery pipeline 66 at the same horizontal plane, the construction difficulty can be reduced, thereby reducing the cost. By arranging the fifth recovery pipeline 67 and the sixth recovery pipeline 68 at a position not higher than the third recovery pipeline 65 and the fourth recovery pipeline 66, more oil (containing moisture and impurities) at the bottom of the storage tank 50 can be discharged into the sampler 13, making the detection result more accurate when the sampler 13 detects whether the oil contains free water, suspended water and solid impurities. In some embodiments, a second automatic return valve 671 is provided on the fifth recovery pipeline 67, and the second automatic return valve 671 is arranged upstream of the inlet of the sampler 13. The second automatic return valve 671 opens when detection is required and automatically closes when the oil in the sampler 13 reaches the quality inspection scale line, without the need for staff operation, which is convenient and fast.

[0071] During the inspection of the oil quality, first open the lid of the second quality inspection tank 11 to be inspected, and check whether the fourth ball valve 651 corresponding to the connection and located downstream of the outlet of the storage tank 50 remains in the normally open state (under normal circumstances, the fourth ball valve 651 is in the normally open state. If the fourth ball valve 651 is closed, open it), and open the fifth ball valve 661 located downstream of the outlet of the second quality inspection tank 11. Then open the second automatic return valve 671 upstream of the inlet of the sampler 13 to flush the sampler 13, and discharge the oil product to the quality inspection scale line (about at the four-fifths position of the closed-circuit sampler). After that, close the second automatic return valve 671 upstream of the inlet of the sampler 13, open the ball valve (not shown) at the bottom of the outlet of the sampler 13 to empty it, and then close the ball valve at the bottom of the outlet of the sampler 13. This step is used to flush the sampler 13 with the oil product to be inspected for quality, making the test results more accurate.

[0072] Further, open the first automatic return valve 652 upstream of the inlet of the second quality inspection tank 11 to be inspected. By observing the second float indicator 121 of the second magnetic flap level gauge 12, discharge the oil product to the second quality inspection tank 11 to the constant scale line (for example, 70L - 90L, preferably 80L), and then close the first automatic return valve 652 upstream of the inlet of the second quality inspection tank 11 to be inspected. Since there is a certain distance between the third recovery pipeline 65 connecting the second quality inspection tank 11 and the storage tank 50, it is necessary to discharge the oil product to the second quality inspection tank 11 to the constant scale line to discharge part of the oil product in the third recovery pipeline 65 connecting the second quality inspection tank 11 and the storage tank 50. Such a setting makes the results of subsequent inspections by the sampler 13 more accurate.

[0073] Further, open the second automatic return valve 671 upstream of the inlet of the sampler 13, discharge the oil product to the sampler to the quality inspection scale line (about at the four-fifths position of the closed-circuit sampling area), and then close the second automatic return valve 671 upstream of the inlet of the sampler 13. Visually inspect whether the oil product contains free water, suspended water, and solid impurities. If the moisture content cannot be determined by visual inspection, a water detector (not shown) can be further used to check whether the oil product contains water (for the quality inspection of the currently used and standby tanks or the quality spot check of the storage tank, it is necessary to use a water detector to check the moisture content of the oil product).

[0074] Further, open the fifth ball valve 661 located downstream of the outlet of the second quality inspection tank 11 to be inspected and the ball valve at the bottom of the outlet of the sampler 13, discharge the oil product to the inlet end 22 of the main pipeline 20, and recycle it to the oil product recovery unit 40 through the oil pump unit 30 (for example, discharge it into the first oil product recovery unit 40a). It should be noted that to ensure the smoothness of the recovery pipeline 60 and the main pipeline 20, before performing this step during the inspection, it is necessary to confirm whether the valves connected to the oil product recovery unit 40 have been opened, which will not be elaborated here.

[0075] Further, if the oil product quality inspection does not meet the requirements, after the above steps are completed, close the fifth ball valve 661 downstream of the outlet of the second quality inspection tank 11 to be inspected and the ball valve at the bottom of the outlet of the sampler 13, and then repeat the above steps until the oil product quality inspection meets the requirements. If the oil product quality inspection meets the requirements, proceed to the next step.

[0076] Further, after the operation is completed, first close the fifth ball valve 661 downstream of the outlet of the second quality inspection tank 11 and lock it (and keep the fourth ball valve 651 downstream of the outlet of the storage tank 50 in the normally open state). Then open the first automatic return valve 652 upstream of the inlet of the second quality inspection tank 11 to be inspected to empty the third recovery pipeline 65, and open the second automatic return valve 671 upstream of the inlet of the sampler 13 to empty the fifth recovery pipeline 67. Then sequentially close the first automatic return valve 652 upstream of the inlet of the second quality inspection tank 11 to be inspected and the second automatic return valve 671 upstream of the inlet of the sampler 13. Then sequentially close the fifth ball valve 661 downstream of the outlet of the second quality inspection tank 11 and the ball valve at the bottom of the sampler outlet. Finally, close the lid of the second quality inspection tank 1.

[0077] During oil product recovery, first open the lid of the first quality inspection tank 42. By observing the first float indicator 431 of the first magnetic flap level gauge 43, discharge oil products into the first quality inspection tank 42 until it reaches 220L - 300L. After sedimentation, visually inspect the oil products in the first quality inspection tank 42. If there is a small amount or trace of moisture and impurities, the first ball valve 621 downstream of the outlet of the first quality inspection tank 42 can be opened, and the oil products flow into the inlet end 22 of the main pipeline 20 and are recovered to the oil product recovery unit through the oil pump unit 30 (for example, discharged into the first oil product recovery unit 40a). For the oil products at the bottom of the first quality inspection tank 42, the third ball valve 641 at the bottom of the outlet of the first quality inspection tank 42 can be opened to discharge the oil products into the zero-level tank 45. If there are a large amount of impurities or moisture, the second ball valve 631 at the bottom of the outlet of the first quality inspection tank 42 can be opened to discharge the oil products into the treatment tank 44 for oil-water separation treatment. With such a setting, the oil products with different qualities can be discharged into the treatment tank 44, the zero-level tank 45, and the first oil product recovery unit 40a, avoiding waste of oil products. Further, repeat the above steps until there is no large amount of moisture and impurities in the oil products in the first quality inspection tank 42 visually inspected, and then open the second automatic return valve 671 upstream of the inlet of the sampler 13 again to visually inspect whether the oil products contain free water, suspended moisture, and solid impurities.

[0078] Further, after the operation is completed, first close and lock the fifth ball valve 661 downstream of the outlet of the second quality inspection tank 11 (and keep the fourth ball valve 651 downstream of the outlet of the storage oil tank 50 in the normally open state). Then, sequentially open the first automatic return valve 652 upstream of the inlet of the inspected second quality inspection tank 11 to empty the third recovery pipeline 65, and open the second automatic return valve 671 upstream of the inlet of the sampler 13 to empty the fifth recovery pipeline 67. After that, sequentially close the first automatic return valve 652 upstream of the inlet of the inspected second quality inspection tank 11 and the second automatic return valve 671 upstream of the inlet of the sampler 13. Then, sequentially close the fifth ball valve 661 downstream of the outlet of the second quality inspection tank 11 and the ball valve at the bottom of the sampler outlet, and close the first ball valve 621 downstream of the outlet of the first quality inspection tank 42, the second ball valve 631 at the bottom of the outlet of the first quality inspection tank 42, and the third ball valve 641 at the bottom of the outlet of the first quality inspection tank 42. Finally, close the lid of the second quality inspection tank 1.

[0079] Further, if it is found through inspection by the second quality inspection tank 11 that the oil in the storage oil tank 50 always contains a large amount of moisture or impurities, the bottom draining operation of the storage oil tank 50 can be carried out. For example, when carrying out the bottom draining operation of the storage oil tank 50, the oil truck oil return operation or the bottom oil pumping operation of the oil tank cannot be carried out simultaneously. Or after the storage oil tank 50 is filled with oil and meets the sedimentation time or through inspection by the second quality inspection tank 11, if the oil quality always has a large amount of moisture and impurities, the bottom draining operation of the oil tank is carried out. Among them, the sedimentation time after the storage oil tank 50 receives oil is: for jet fuel, not less than 3 hours per meter of liquid column. In special cases, for the storage oil tank 50 equipped with a floating suction pipe, the standing time of jet fuel should not be less than 8 hours. In some embodiments, the bottom draining operation of the storage oil tank 50 is to drain the bottom of the second oil product recovery unit 40b. Before the bottom draining operation, first check the oil quality of the recovery tank 41 of the second oil product recovery unit 40b, then open the electric valve (not shown), and then open the dirty oil pipeline valve of the recovery tank 41 to be drained, and drain the bottom of the recovery tank 41 in a self-pressure manner. After the bottom draining is completed, close the electric valve and the dirty oil pipeline valve of the bottom recovery tank 41, and then check the oil quality of the drained tank again according to the above process. With such a setting, different quality oils can be effectively classified and processed for recycling and utilization.

[0080] The technical solutions disclosed in the embodiments of the present application can complement each other without conflict.

[0081] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. An oil product recovery quality inspection system, characterized in that include: A main pipe, including an outlet port and multiple inlet ports; An oil pump unit, wherein the inlet of the oil pump unit is connected to the outlet; A plurality of oil quality inspection units, used to be connected to corresponding oil storage tanks, the plurality of oil quality inspection units are distributed at intervals along the main pipeline, and the outlets of the oil quality inspection units are connected to the inlet ends, and the oil quality inspection units are used to receive oil products at the bottom of the oil storage tanks for inspection; An oil recovery unit, wherein the inlet of the oil recovery unit is connected to the outlet of the oil pump unit, the outlet of the oil recovery unit is connected to the inlet end, the main pipeline is used to receive the oil flowing out of the oil quality inspection unit, the oil pump unit is used to transport the oil in the main pipeline to the oil recovery unit, and the oil recovery unit is used to recover and store the oil; The oil product recovery and quality inspection system further comprises a recovery pipeline, wherein the plurality of oil product quality inspection units are spaced apart and distributed on both sides of the main pipeline and connected to the inlet end through the recovery pipeline; The recovery pipeline includes a first recovery pipeline and a second recovery pipeline, the oil recovery unit includes a recovery tank and a first quality inspection tank, the recovery tank is connected to the outlet of the oil pump unit through the first recovery pipeline, and the first quality inspection tank is connected to the inlet end through the second recovery pipeline; The oil recovery unit includes a first oil recovery unit and a second oil recovery unit. The first oil recovery unit and the second oil recovery unit are connected in parallel between the outlet and the inlet end of the oil pump unit. The oil quality of the oil recovered by the first oil recovery unit is higher than the oil quality of the oil recovered by the second oil recovery unit.

2. The oil product recovery quality inspection system according to claim 1, wherein The main pipeline and the recovery pipeline are both arranged on the same horizontal plane.

3. The oil product recovery quality inspection system according to claim 1, characterized in that The inlet of the oil pump unit is arranged at a position lower than the outlet.

4. The oil product recovery quality inspection system according to claim 1, wherein The oil recovery quality inspection system also includes a buffer pipeline, the inlet of the buffer pipeline is connected to the outlet end, the outlet of the buffer pipeline is connected to the inlet of the oil pump unit, and the setting position of the inlet of the buffer pipeline is lower than the setting position of the outlet end.

5. The oil product recovery quality inspection system according to claim 4, characterized in that, The buffer pipeline includes a first end connected to the outlet end and a second end connected to the inlet of the oil pump unit, and the second end is arranged at a position lower than the first end.

6. The oil product recovery quality inspection system according to claim 1, characterized in that The oil product recovery quality inspection system also includes a buffer tank, which is arranged at the outlet end. The buffer tank is arranged at a position lower than the main pipeline. The oil pump unit is arranged in the buffer tank.

7. The oil product recovery quality inspection system according to claim 1, wherein The oil pump unit comprises a pump, an inlet valve and an outlet valve. The inlet valve is connected between the inlet and the outlet of the pump, and the outlet valve is connected between the outlet of the pump and the inlet of the oil recovery unit.

8. The oil product recovery quality inspection system according to claim 7, wherein, The inlet valve remains in a normally open state; and / or The outlet valve is not fully open.

9. The oil product recovery quality inspection system according to claim 7, characterized in that, The oil pump unit further comprises an exhaust valve, which is arranged between the outlet of the pump and the outlet valve.

10. The oil product recovery quality inspection system according to claim 9, characterized in that, The exhaust valve comprises an automatic exhaust valve; and / or The exhaust valve remains in a normally open state.

11. The oil product recovery quality inspection system according to claim 1, characterized in that, The oil product recovery quality inspection system further includes a first magnetic flap level gauge disposed on the outer sidewall of the first quality inspection tank; the first magnetic flap level gauge includes a first float indicator, and the first float indicator floats up and down according to the liquid level change of the oil product in the first quality inspection tank to indicate the liquid level of the oil product.

12. The oil product recovery quality inspection system according to claim 11, wherein, A first ball valve is provided on the second recovery pipeline, and the first ball valve is disposed downstream of the outlet of the first quality inspection tank.

13. The oil product recovery quality inspection system according to claim 12, wherein, The recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline. The first quality inspection tank is connected to the treatment tank through the third recovery pipeline, and the first quality inspection tank is connected to the zero-level tank through the fourth recovery pipeline. The quality of the oil product stored in the treatment tank is higher than the quality of the oil product stored in the zero-level tank.

14. The oil product recovery quality inspection system according to claim 13, characterized in that, A second ball valve is provided on the third recovery pipeline, and the second ball valve is disposed upstream of the inlet of the treatment tank; a third ball valve is provided on the fourth recovery pipeline, and the third ball valve is disposed upstream of the inlet of the zero-level tank.

15. The oil product recovery quality inspection system according to claim 14, characterized in that, The installation position of the first ball valve is higher than the installation positions of the second ball valve and the third ball valve.

16. The oil product recovery quality inspection system according to claim 1, wherein, A safety liquid level line is provided in the recovery tank, and the safety liquid level line does not exceed half of the height of the recovery tank; the oil product recovery quality inspection system further includes a plurality of spare tanks and a conveying pipeline. The spare tanks are connected to the recovery tank through the conveying pipeline, and the conveying pipeline is used to convey at least part of the oil product in the recovery tank to the spare tanks for storage when the oil product in the recovery tank exceeds the safety liquid level line.

17. The oil product recovery quality inspection system according to claim 1, characterized in that, The recovery pipeline includes a third recovery pipeline and a fourth recovery pipeline; the oil product quality inspection unit includes a second quality inspection tank. The second quality inspection tank is connected to the storage tank through the third recovery pipeline, and the second quality inspection tank is connected to the inlet end through the fourth recovery pipeline.

18. The oil product recovery quality inspection system according to claim 17, characterized in that, The oil product recovery quality inspection system further includes a second magnetic flap level gauge disposed on the outer sidewall of the second quality inspection tank; the second magnetic flap level gauge includes a second float indicator, and the second float indicator floats up and down according to the liquid level change of the oil product in the second quality inspection tank to indicate the liquid level of the oil product.

19. The oil product recovery quality inspection system according to claim 18, wherein, Both the third recovery pipeline and the fourth recovery pipeline are disposed on the same horizontal plane.

20. The oil product recovery quality inspection system according to claim 18, characterized in that, A fourth ball valve and a first automatic return valve are provided on the third recovery pipeline. The fourth ball valve is disposed downstream of the outlet of the storage tank, and the first automatic return valve is disposed upstream of the inlet of the second quality inspection tank; a fifth ball valve is provided on the fourth recovery pipeline, and the fifth ball valve is disposed downstream of the outlet of the second quality inspection tank.

21. The oil product recovery quality inspection system according to claim 20, wherein, The fourth ball valve remains in an open state.

22. The oil product recovery quality inspection system according to claim 17, characterized in that, The recovery pipeline includes a fifth recovery pipeline and a sixth recovery pipeline; the oil product quality inspection unit includes a sampler. The sampler is connected to the third recovery pipeline through the fifth recovery pipeline, and the sampler is connected to the fourth recovery pipeline through the sixth recovery pipeline.

23. The oil product recovery quality inspection system according to claim 22, wherein, Both the fifth recovery pipeline and the sixth recovery pipeline are disposed on the same horizontal plane.

24. The oil product recovery quality inspection system according to claim 22, wherein, The installation positions of the fifth recovery pipeline and the sixth recovery pipeline are not higher than the installation positions of the third recovery pipeline and the fourth recovery pipeline.

25. The oil product recovery quality inspection system according to claim 22, wherein, A second automatic return valve is provided on the fifth recovery pipeline, and the second automatic return valve is provided upstream of the inlet of the sampler.

26. An aviation fuel storage system, characterized in that, It includes a plurality of oil storage tanks and an oil product recovery and quality inspection system as described in any one of claims 1 to 25, and a plurality of oil product quality inspection units of the oil product recovery and quality inspection system correspond to the plurality of oil storage tanks.

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