Accident oil drainage system and method

Abstract

The accident oil drainage system comprises an accident oil pool, the accident oil pool is communicated with an oil-water layering pool through an outlet pipeline, oil in the oil-water layering pool is pumped to an oil-water separation pool through an oil well pump, a water collection pool is arranged beside the oil-water separation pool, and a water permeable membrane wall is arranged between the oil-water separation pool and the water collection pool. The water-permeable membrane wall consists of a foundation wall and a water-permeable membrane; an outlet valve, an outlet pump, a filter and an oil-water layering pool inlet valve are sequentially arranged on the outlet pipeline according to the liquid flow direction; the oil-water layering pool is provided with an interface sensor, the interface sensor is electrically connected with the controller, the controller is used for controlling the lifting device to act, and the lifting device is used for driving a liquid inlet head of the oil well pump to ascend and descend. A multi-stage separation technology is adopted, preliminary separation is performed through the oil-water layering pool, further refining is performed through the oil-water separation pool, and the separation effect is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of accident oil treatment, and in particular relates to an accident oil drainage system and method. Background Art

[0002] During the operation of wind turbines, oil-water mixtures are often produced due to leakage in the lubrication system and cooling system. These oil-water mixtures will not only affect the normal operation of wind turbines, but may also pollute the environment. Therefore, efficient and reliable oil-water separation technology is of great significance for the maintenance and environmental protection of wind turbines. Deficiencies of the existing technology: The commonly used oil-water separation method in wind turbines is gravity sedimentation. Although the gravity sedimentation method is simple to operate, the separation speed is slow and the separation effect for tiny oil droplets is poor.

[0003] Based on the existing technical problems, it is urgent to design a separation system with high separation efficiency and high degree of automation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an accident oil drainage system and method. The present invention adopts a multi-stage separation technology, firstly performs preliminary separation in an oil-water stratification tank, and then further refines in an oil-water separation tank, thereby ensuring the separation effect; the entire system realizes automatic control through sensors and controllers, reduces the need for manual intervention, and improves processing efficiency and safety.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: An accident oil drainage system comprises an accident oil pool, the accident oil pool is connected to an oil-water separation pool through an outlet pipe, the oil in the oil-water separation pool is pumped to an oil-water separation pool through an oil pump, a water collection pool is arranged next to the oil-water separation pool, a water permeable membrane wall is arranged between the oil-water separation pool and the water collection pool, and the water permeable membrane wall is composed of a foundation wall and a water permeable membrane; The outlet pipeline is provided with an outlet valve, an outlet pump, a filter and an oil-water stratification tank inlet valve in sequence according to the liquid flow direction; The oil-water stratification tank is provided with an interface sensor, which is electrically connected to a controller. The controller is used to control the action of a lifting device, and the lifting device is used to drive the liquid inlet head of the oil pump to rise and fall.

[0006] Preferably, there are a plurality of oil-water stratification pools, each of which is provided with an oil-water stratification pool inlet valve, and each of which is provided with a boundary position sensor and an oil pump.

[0007] Preferably, a backwash pipe is provided at the bottom of each oil-water stratification tank, the backwash pipe is connected to the filter, a sewage pipe is provided on the filter, a backwash control valve and a backwash control pump are provided on the backwash pipe, and a sewage valve is provided on the sewage pipe; Each oil-water stratification tank is equipped with a liquid level sensor; The liquid level sensor, backwash control pump, backwash control valve and oil-water stratification tank inlet valve are all electrically connected to the controller.

[0008] Preferably, the lifting device is a height-adjusting oil cylinder, a telescopic rod of the height-adjusting oil cylinder is connected to a liquid inlet head, and the liquid inlet head is connected to an input end of an oil pump via a hose.

[0009] Preferably, a heating device is provided in the oil-water separation tank, a water guide plate is provided on the top of the oil-water separation tank, a plurality of water guide grooves are provided on the water guide plate, and the outlet of the water guide groove is located at the top of the water collection tank.

[0010] Preferably, a partition wall is provided between the oil-water stratification pool and the oil-water separation pool, one end of the water guide plate is hinged on the partition wall, and the other end of the water guide plate is placed on the top of the foundation wall, and a water trough adapted to the water guide trough is provided on the top of the foundation wall.

[0011] Preferably, the sewage pipe is connected to the sewage tank.

[0012] Preferably, an oil drain pipe is provided at the bottom of the oil-water separation tank, an oil drain valve is provided on the oil drain pipe, and the oil drain pipe is connected to the oil storage tank; A drain pipe is provided at the bottom of the water collection tank, and a drain valve is provided on the drain pipe.

[0013] Preferably, the number of the oil-water separation tank and the water collection tank are both one, and a plurality of oil-water stratification tanks are matched with one oil-water separation tank.

[0014] An operating method of an accident oil drainage system comprises the following steps: S1. Number each oil-water stratification pool, namely, No. 1 oil-water stratification pool, No. 2 oil-water stratification pool, ... No. n oil-water stratification pool.

[0015] S2. According to the numbering of the oil-water stratification pool, the liquid level sensor, the oil-water stratification pool inlet valve, the interface sensor, the oil pump, the backwash control valve, and the backwash control pump correspondingly matched to each oil-water stratification pool are numbered; S3, open the outlet valve, outlet pump and the inlet valve of the No. 1 oil-water stratification pool. When the No. 1 liquid level sensor detects that the No. 1 oil-water stratification pool has reached the full liquid level, the inlet valve of the No. 1 oil-water stratification pool is automatically closed, and the inlet valve of the No. 2 oil-water stratification pool is opened. When the No. 2 liquid level sensor detects that the No. 2 oil-water stratification pool has reached the full liquid level, the inlet valve of the No. 2 oil-water stratification pool is closed, and the inlet valve of the No. 3 oil-water stratification pool is opened. And so on, until the n-1th liquid level sensor detects that the n-1th oil-water stratification pool has reached the full liquid level, the inlet valve of the n-1th oil-water stratification pool is closed, and the inlet valve of the nth oil-water stratification pool is opened. When the nth liquid level sensor detects that the nth oil-water stratification pool has reached the full liquid level, the inlet valve of the nth oil-water stratification pool is closed. At this point, all the n oil-water stratification pools are filled with oil-water mixture.

[0016] S4, No. 1 oil-water separation tank starts to separate after being left still for a period of time. No. 1 boundary position sensor is used to detect the height of the oil-water boundary. According to the signal of No. 1 boundary position sensor, the controller controls No. 1 height adjustment cylinder to extend No. 1 liquid inlet head to the boundary line, and turns on No. 1 oil pump to pump liquid into the oil-water separation tank. At this time, the liquid in the oil-water separation tank is mainly oil, and the water content is relatively small.

[0017] S5. The liquid in the No. 1 oil-water stratification tank is mainly water, which may contain a small amount of oil. After step S4 is completed, the No. 1 backwash control valve and the No. 1 backwash control pump are opened, and the filter is backwashed with the water in the No. 1 oil-water stratification tank, and the flushed waste liquid is discharged into the sewage tank. The filter is used to filter the waste residue of the accident oil, and the segmented flushing filter can improve its filtering effect.

[0018] S6. When all the liquid in the No. 1 oil-water stratification tank is drained, the outlet valve, the outlet pump and the No. 1 oil-water stratification tank inlet valve are opened again. When the No. 1 liquid level sensor detects that the No. 1 oil-water stratification tank reaches the full liquid level again, the No. 1 oil-water stratification tank inlet valve is closed.

[0019] S7, after the oil-water separation tank No. n is left to stand for a period of time, it begins to separate. The boundary sensor No. n is used to detect the height of the boundary line between oil and water. According to the signal of the boundary sensor No. n, the controller controls the oil cylinder (22) for height adjustment to extend the liquid inlet head No. n to the boundary line, and turns on the oil pump No. n to pump the liquid into the oil-water separation tank. At this time, the liquid in the oil-water separation tank is mainly oil, and the water content is relatively small. The liquid in the oil-water separation tank No. n is mainly water, which may contain a small amount of oil.

[0020] When the upper liquid of the No. n oil-water stratification tank is pumped out, open the No. n backwash control valve and the No. n backwash control pump, use the water in the No. n oil-water stratification tank to backwash the filter, and the flushing waste liquid is discharged into the sewage tank. When the backwash control valve is opened, the inlet valve of the oil-water stratification tank is closed.

[0021] When the liquid in the No. n oil-water stratification tank is completely drained, the outlet valve, outlet pump and inlet valve of the No. n oil-water stratification tank are opened again. When the No. n liquid level sensor detects that the No. n oil-water stratification tank reaches the full liquid level again, the inlet valve of the No. n oil-water stratification tank is closed.

[0022] During the operation of steps S4-S7, multiple oil-water stratification tanks cyclically pump the upper layer of liquid into the oil-water separation tank, and the water in the oil-water separation tank enters the water collection tank through the permeable membrane wall. At the same time, the heating device heats the liquid in the oil-water separation tank to the boiling point of water, and the water vapor rises to the water guide plate and condenses into water, and the water enters the water collection tank along the water guide groove. The water collection tank will collect clean water.

[0023] The present invention can achieve the following beneficial effects: 1. The present invention adopts multi-stage separation technology, firstly separates through the oil-water stratification tank, and then further refines through the oil-water separation tank, ensuring the separation effect. The entire system realizes automatic control through sensors and controllers, reduces the need for manual intervention, and improves processing efficiency and safety.

[0024] 2. The design of this system takes resource recycling into consideration, such as using the water in the oil-water stratification pool to backwash the filter, and evaporating the water through the heating device and condensing and collecting it, thus reducing the waste of water resources. The number of oil-water stratification pools can be adjusted according to actual needs to meet the treatment needs of different scales.

[0025] 3. The design of the backwash system effectively solves the problem of filter clogging, prolongs the service life of the filter, and reduces maintenance costs. Each module operates independently, and only a single module needs to be stopped for maintenance without affecting the operation of the entire system. The multiple oil-water stratification tanks of the present invention are combined with an intermittent backwash design, which can improve the filtration quality of the filter and increase the operating efficiency of the entire system.

[0026] 4. The combination of water-permeable membrane and distillation technology provides dual separation guarantees, ensuring the thoroughness and reliability of oil-water separation. Water-permeable membrane technology can effectively separate oil and water at room temperature, while distillation technology can further purify at high temperature. The two complement each other and improve the separation effect. Water-permeable membrane technology can efficiently recover most of the water, while distillation technology can further recover the remaining water, maximizing the water recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a system structure diagram of the present invention; Figure 2 This is a distribution diagram of the oil-water stratification tank, the oil-water separation tank and the water collection tank of the present invention; Figure 3The structure diagram of the water-permeable membrane wall and the water guide plate of the present invention (three-dimensional diagram Figure 1 ); Figure 4 The structure diagram of the water-permeable membrane wall and the water guide plate of the present invention (three-dimensional diagram Figure 2 ).

[0028] In the figure: accident oil pool 1, oil-water stratification pool 2, oil-water separation pool 3, water collecting pool 4, permeable membrane wall 5, foundation wall 501, permeable membrane 502, water trough 503, outlet valve 6, outlet pump 7, filter 8, oil-water stratification pool inlet valve 9, interface sensor 10, oil pump 11, liquid inlet head 1101, backwash control valve 12, backwash control pump 13, drain valve 14, heating device 15, water guide plate 16, water guide trough 17, drain pool 18, oil drain valve 19, oil storage tank 20, drain valve 21, height adjustment cylinder 22. DETAILED DESCRIPTION

[0029] The preferred solution is Figures 1 to 4 As shown, an accident oil drainage system includes an accident oil pool 1, the accident oil pool 1 is connected to an oil-water stratification pool 2 through an outlet pipe, the oil in the oil-water stratification pool 2 is pumped to an oil-water separation pool 3 by an oil pump 11, a water collecting pool 4 is provided next to the oil-water separation pool 3, a permeable membrane wall 5 is provided between the oil-water separation pool 3 and the water collecting pool 4, and the permeable membrane wall 5 is composed of a foundation wall 501 and a permeable membrane 502; The outlet pipe is provided with an outlet valve 6, an outlet pump 7, a filter 8 and an oil-water stratification tank inlet valve 9 in sequence according to the liquid flow direction; The oil-water stratification tank 2 is provided with an interface sensor 10, which is electrically connected to a controller. The controller is used to control the action of a lifting device, and the lifting device is used to drive the liquid inlet head 1101 of the oil pump 11 to rise and fall.

[0030] The equipment functions of this system are: Accident oil pool: responsible for collecting the oil-water mixture produced by the accident.

[0031] Oil-water stratification tank: The oil and water are initially separated through natural sedimentation or chemical action, with the upper layer being oil and the lower layer being water. Each tank is equipped with a boundary sensor and an oil pump, which can automatically control the oil extraction process and improve the automation level of the operation. The oil pump extracts the upper oil of the oil-water stratification tank into the oil-water separation tank, but a small amount of water will also be pumped into the oil-water separation tank.

[0032] Oil-water separation tank: further separates the oil-water mixture. A heating device is installed inside to accelerate the separation process. A water guide plate and a water guide groove are designed on the top to collect pure water after the water vapor is condensed.

[0033] Water collection tank: collects water filtered through the permeable membrane wall from the oil-water separation tank to ensure the cleanliness of the water. It also collects pure water after the water vapor is condensed.

[0034] Water-permeable membrane: used to separate water from oil-water mixture, ensuring that water can pass through the membrane while oil is blocked. Polyethersulfone (PES) can be selected, which has excellent water permeability and high separation efficiency. It can work stably at higher temperatures. It is suitable for high-temperature and high-flow oil-water separation systems.

[0035] Backwash system: A backwash pipe is provided at the bottom of each oil-water stratification tank, which is connected to the filter. The filter can be cleaned regularly to keep it in good working condition.

[0036] The entire system is controlled by a controller. The controller of this embodiment is a PLC controller, and the model may be Siemens S7-1500.

[0037] Furthermore, there are multiple oil-water stratification pools 2, each of which is provided with an oil-water stratification pool inlet valve 9, and each of which is provided with a boundary sensor 10 and an oil pump 11. The boundary sensor 10 can be an external buoy level gauge, which is used to measure the boundary position between oil and water.

[0038] Furthermore, a backwash pipe is provided at the bottom of each oil-water stratification tank 2, the backwash pipe is connected to the filter 8, a sewage pipe is provided on the filter 8, a backwash control valve 12 and a backwash control pump 13 are provided on the backwash pipe, and a sewage valve 14 is provided on the sewage pipe; Each oil-water stratification tank 2 is provided with a liquid level sensor; The liquid level sensor, the backwash control pump 13, the backwash control valve 12 and the oil-water stratification tank inlet valve 9 are all electrically connected to the controller.

[0039] This system uses multiple oil-water stratification tanks to work in turns, ensuring continuous processing capacity and facilitating maintenance and management. The status of the oil-water mixture is monitored in real time through equipment such as liquid level sensors and interface sensors. The controller automatically adjusts the opening and closing of valves, the start and stop of pumps, etc. based on this information to ensure the stable operation of the system.

[0040] Furthermore, the lifting device is a height-adjusting oil cylinder 22 , a telescopic rod of the height-adjusting oil cylinder 22 is connected to the liquid inlet head 1101 , and the liquid inlet head 1101 is connected to the input end of the oil pump 11 through a hose.

[0041] The height adjustment cylinder controls the up and down movement of the liquid inlet head through a telescopic rod. The liquid inlet head is connected to the oil pump through a hose to achieve accurate extraction of the oil-water mixture.

[0042] Furthermore, a heating device 15 is provided in the oil-water separation tank 3 , a water guide plate 16 is provided on the top of the oil-water separation tank 3 , a plurality of water guide grooves 17 are provided on the water guide plate 16 , and an outlet of the water guide groove 17 is located at the top of the water collecting tank 4 .

[0043] There is a heating device in the oil-water separation tank to help separate the oil and water, and the water guide plate and water guide groove on the top guide the separated water to the water collection tank.

[0044] Furthermore, a partition wall is provided between the oil-water stratification pool 2 and the oil-water separation pool 3 , one end of the water guide plate 16 is hinged on the partition wall, and the other end of the water guide plate 16 is placed on the top of the foundation wall 501 , and a water trough 503 adapted to the water guide trough 17 is provided on the top of the foundation wall 501 .

[0045] The partition wall separates the oil-water stratification pool and the oil-water separation pool. One end of the water guide plate is fixed on the partition wall, and the other end is placed on the foundation wall. A water trough on the foundation wall is connected to the water guide trough to ensure that water flows smoothly into the collection pool.

[0046] Furthermore, the sewage pipe is connected to the sewage tank 18. The sewage pipe discharges the waste liquid in the system into the sewage tank to ensure the cleanliness of the system.

[0047] Furthermore, an oil drain pipe is provided at the bottom of the oil-water separation tank 3, an oil drain valve 19 is provided on the oil drain pipe, and the oil drain pipe is connected to the oil storage tank 20; A drain pipe is provided at the bottom of the water collecting tank 4, and a drain valve 21 is provided on the drain pipe.

[0048] The oil drain pipe at the bottom of the oil-water separation tank transports the separated oil to the oil storage tank through the oil drain valve, and the drain pipe at the bottom of the water collection tank discharges the clean water through the drain valve.

[0049] Preferably, the number of the oil-water separation tank 3 and the water collection tank 4 are both one, and a plurality of oil-water stratification tanks 2 are matched with one oil-water separation tank 3 .

[0050] This system has an oil-water separation tank and a water collection tank. Multiple oil-water stratification tanks share this oil-water separation tank to improve resource utilization.

[0051] An operating method of an accident oil drainage system comprises the following steps: S1. Number each oil-water stratification pool 2, namely, No. 1 oil-water stratification pool, No. 2 oil-water stratification pool, ... No. n oil-water stratification pool.

[0052] S2, according to the numbering of the oil-water stratification pool 2, the liquid level sensor, the oil-water stratification pool inlet valve 9, the interface sensor 10, the oil pump 11, the backwash control valve 12, and the backwash control pump 13 adapted to each oil-water stratification pool 2 are numbered accordingly; For example, the equipment numbers corresponding to the No. 1 oil-water stratification tank are No. 1 liquid level sensor, No. 1 oil-water stratification tank inlet valve, No. 1 boundary sensor, No. 1 oil pump, No. 1 backwash control valve, No. 1 backwash control pump, and so on.

[0053] S3, open the outlet valve 6, the outlet pump 7 and the inlet valve 9 of the No. 1 oil-water stratification pool. When the No. 1 liquid level sensor detects that the No. 1 oil-water stratification pool 2 has reached the full liquid level, the inlet valve 9 of the No. 1 oil-water stratification pool is automatically closed, and the inlet valve 9 of the No. 2 oil-water stratification pool is opened. When the No. 2 liquid level sensor detects that the No. 2 oil-water stratification pool 2 has reached the full liquid level, the inlet valve 9 of the No. 2 oil-water stratification pool is closed, and the inlet valve 9 of the No. 3 oil-water stratification pool is opened. And so on, until the n-1th liquid level sensor detects that the n-1th oil-water stratification pool 2 has reached the full liquid level, the inlet valve 9 of the n-1th oil-water stratification pool is closed, and the inlet valve 9 of the nth oil-water stratification pool is opened. When the nth liquid level sensor detects that the nth oil-water stratification pool 2 has reached the full liquid level, the inlet valve 9 of the nth oil-water stratification pool is closed. At this point, all the n oil-water stratification pools 2 are filled with oil-water mixture.

[0054] S4, the No. 1 oil-water separation tank 2 starts to separate after being left still for a period of time, and the No. 1 boundary position sensor 10 is used to detect the height of the oil-water boundary. According to the signal of the No. 1 boundary position sensor 10, the controller controls the No. 1 height adjustment cylinder 22 to extend the No. 1 liquid inlet head 1101 to the boundary, and turns on the No. 1 oil pump 11 to pump the liquid into the oil-water separation tank 3. At this time, the liquid in the oil-water separation tank 3 is mainly oil, and the water content is relatively small.

[0055] S5, the liquid in the No. 1 oil-water stratification tank 2 is mainly water, which may contain a small amount of oil. After step S4 is completed, the No. 1 backwashing control valve 12 and the No. 1 backwashing control pump 13 are opened, and the filter 8 is backwashed with the water in the No. 1 oil-water stratification tank 2, and the flushed waste liquid is discharged into the sewage tank 18. The filter 8 is used to filter the waste residue of the accident oil, and the segmented flushing of the filter 8 can improve its filtering effect.

[0056] S6. When all the liquid in the No. 1 oil-water stratification tank 2 is emptied, the outlet valve 6, the outlet pump 7 and the No. 1 oil-water stratification tank inlet valve 9 are opened again. When the No. 1 liquid level sensor detects that the No. 1 oil-water stratification tank 2 reaches the full liquid level again, the No. 1 oil-water stratification tank inlet valve 9 is closed.

[0057] S7, after the oil-water separation tank 2 is left to stand for a period of time, the oil-water separation tank 2 begins to separate. The boundary sensor 10 is used to detect the height of the oil-water boundary. According to the signal of the boundary sensor 10, the controller controls the oil cylinder 22 for height adjustment to extend the liquid inlet head 1101 to the boundary, and turns on the oil pump 11 to pump the liquid into the oil-water separation tank 3. At this time, the liquid in the oil-water separation tank 3 is mainly oil, and the water content is relatively small. The liquid in the oil-water separation tank 2 is mainly water, which may contain a small amount of oil.

[0058] When the upper layer of liquid in the No. n oil-water stratification tank 2 is completely pumped out, the No. n backwash control valve 12 and the No. n backwash control pump 13 are opened, and the filter 8 is backwashed with the water in the No. n oil-water stratification tank 2, and the flushed waste liquid is discharged into the sewage tank 18. When the backwash control valve 12 is opened, the inlet valve 9 of the oil-water stratification tank is closed.

[0059] When the liquid in the No. n oil-water stratification tank 2 is completely drained, the outlet valve 6, the outlet pump 7 and the No. n oil-water stratification tank inlet valve 9 are opened again. When the No. n liquid level sensor detects that the No. n oil-water stratification tank 2 reaches the full liquid level again, the No. n oil-water stratification tank inlet valve 9 is closed.

[0060] During the operation of steps S4-S7, multiple oil-water stratification pools 2 cyclically pump the upper layer of liquid into the oil-water separation pool 3, and the water in the oil-water separation pool 3 enters the water collection pool 4 through the permeable membrane wall 5. At the same time, the heating device 15 heats the liquid in the oil-water separation pool 3 to the boiling point of water, and the water vapor rises to the water guide plate 16 and condenses into water, and the water enters the water collection pool 4 along the water guide groove 17. The water collection pool 4 will collect clean water.

[0061] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An accident oil drainage system, comprising an accident oil pool (1), characterized in that: The accident oil pool (1) is connected to the oil-water separation pool (2) through an outlet pipe, and the oil in the oil-water separation pool (2) is pumped to the oil-water separation pool (3) through an oil pump (11). A water collecting pool (4) is provided next to the oil-water separation pool (3), and a water permeable membrane wall (5) is provided between the oil-water separation pool (3) and the water collecting pool (4), wherein the water permeable membrane wall (5) is composed of a foundation wall (501) and a water permeable membrane (502); The outlet pipeline is provided with an outlet valve (6), an outlet pump (7), a filter (8) and an oil-water stratification tank inlet valve (9) in sequence according to the flow direction of the liquid; The oil-water stratification tank (2) is provided with an interface sensor (10), which is electrically connected to a controller. The controller is used to control the action of a lifting device, and the lifting device is used to drive the liquid inlet head (1101) of the oil pump (11) to rise and fall.

2. The emergency oil drainage system according to claim 1, characterized in that: There are a plurality of oil-water stratification pools (2), each of which is provided with an oil-water stratification pool inlet valve (9), and each of which is provided with a boundary position sensor (10) and an oil pump (11).

3. The emergency oil drainage system according to claim 2, characterized in that: A backwash pipe is provided at the bottom of each oil-water stratification tank (2), the backwash pipe is connected to the filter (8), a sewage pipe is provided on the filter (8), a backwash control valve (12) and a backwash control pump (13) are provided on the backwash pipe, and a sewage valve (14) is provided on the sewage pipe; Each oil-water stratification tank (2) is provided with a liquid level sensor; The liquid level sensor, the backwash control pump (13), the backwash control valve (12) and the oil-water stratification tank inlet valve (9) are all electrically connected to the controller.

4. The accident oil drainage system according to claim 1, characterized in that: The lifting device is a height-adjusting oil cylinder (22), the telescopic rod of the height-adjusting oil cylinder (22) is connected to a liquid inlet head (1101), and the liquid inlet head (1101) is connected to an input end of an oil pump (11) via a hose.

5. The emergency oil drainage system according to claim 1, characterized in that: A heating device (15) is provided in the oil-water separation tank (3). A water guide plate (16) is provided on the top of the oil-water separation tank (3). A plurality of water guide grooves (17) are provided on the water guide plate (16). The outlets of the water guide grooves (17) are located at the top of the water collection tank (4).

6. The emergency oil drainage system according to claim 5, characterized in that: A partition wall is provided between the oil-water stratification pool (2) and the oil-water separation pool (3); one end of a water guide plate (16) is hinged on the partition wall; the other end of the water guide plate (16) is placed on the top of a foundation wall (501); and a water trough (503) adapted to the water guide trough (17) is provided on the top of the foundation wall (501).

7. The emergency oil drainage system according to claim 3, characterized in that: The sewage pipe is connected to the sewage tank (18).

8. The emergency oil drainage system according to claim 1, characterized in that: An oil drain pipe is provided at the bottom of the oil-water separation tank (3), an oil drain valve (19) is provided on the oil drain pipe, and the oil drain pipe is connected to the oil storage tank (20); A drainage pipe is provided at the bottom of the water collecting tank (4), and a drainage valve (21) is provided on the drainage pipe.

9. The emergency oil drainage system according to claim 1, characterized in that: The number of the oil-water separation tank (3) and the water collection tank (4) is one, and a plurality of oil-water stratification tanks (2) are compatible with one oil-water separation tank (3).

10. The operating method of an emergency oil drainage system according to claim 1, characterized in that The following steps are involved: S1. Number each oil-water stratification pool (2), namely, oil-water stratification pool No. 1, oil-water stratification pool No. 2, ..., oil-water stratification pool No. n; S2. According to the numbers of the oil-water stratification pools (2), the liquid level sensor, the oil-water stratification pool inlet valve (9), the interface sensor (10), the oil pump (11), the backwash control valve (12), and the backwash control pump (13) correspondingly numbered for each oil-water stratification pool (2); S3, opening the outlet valve (6), the outlet pump (7) and the inlet valve (9) of the No. 1 oil-water stratification pool; when the No. 1 liquid level sensor detects that the No. 1 oil-water stratification pool (2) has reached the full liquid level, the inlet valve (9) of the No. 1 oil-water stratification pool is automatically closed, and the inlet valve (9) of the No. 2 oil-water stratification pool is opened; when the No. 2 liquid level sensor detects that the No. 2 oil-water stratification pool (2) has reached the full liquid level, the inlet valve (9) of the No. 2 oil-water stratification pool is closed, and the inlet valve (9) of the No. 3 oil-water stratification pool is opened; and so on, until the n-1th liquid level sensor detects that the n-1th oil-water stratification pool (2) has reached the full liquid level, the inlet valve (9) of the n-1th oil-water stratification pool is closed, and the inlet valve (9) of the nth oil-water stratification pool is opened; when the nth liquid level sensor detects that the nth oil-water stratification pool (2) has reached the full liquid level, the inlet valve (9) of the nth oil-water stratification pool is closed; at this point, all the n oil-water stratification pools (2) are filled with oil-water mixed liquid; S4, the No. 1 oil-water separation tank (2) starts to separate after being left to stand for a period of time, and the No. 1 boundary position sensor (10) is used to detect the height of the boundary line between oil and water; the controller controls the No. 1 height adjustment cylinder (22) to extend the No. 1 liquid inlet head (1101) to the boundary line according to the signal of the No. 1 boundary position sensor (10), and starts the No. 1 oil pump (11) to pump the liquid into the oil-water separation tank (3); at this time, the liquid in the oil-water separation tank (3) is mainly oil, and the water content is relatively small; S5, the liquid in the No. 1 oil-water stratification tank (2) is mainly water, which may contain a small amount of oil; after step S4 is completed, the No. 1 backwashing control valve (12) and the No. 1 backwashing control pump (13) are opened, and the filter (8) is backwashed with the water in the No. 1 oil-water stratification tank (2), and the flushing waste liquid is discharged into the sewage tank (18); the filter (8) is used to filter the waste residue of the accident oil, and the filter (8) can be flushed in sections to improve its filtering effect; S6. When the liquid in the No. 1 oil-water stratification tank (2) is completely drained, the outlet valve (6), the outlet pump (7) and the No. 1 oil-water stratification tank inlet valve (9) are opened again; when the No. 1 liquid level sensor detects that the No. 1 oil-water stratification tank (2) reaches the full liquid level again, the No. 1 oil-water stratification tank inlet valve (9) is closed; S7, after the oil-water separation tank (2) is left to stand for a period of time, the oil-water separation tank (2) starts to separate into layers, and the boundary sensor (10) is used to detect the height of the boundary between oil and water. According to the signal of the boundary sensor (10), the controller controls the oil cylinder (22) for height adjustment to extend the liquid inlet head (1101) to the boundary, and starts the oil pump (11) to pump the liquid into the oil-water separation tank (3). At this time, the liquid in the oil-water separation tank (3) is mainly oil, and the water content is relatively small. The liquid in the oil-water separation tank (2) is mainly water, and may contain a small amount of oil. When the upper layer of liquid in the No. n oil-water stratification tank (2) is completely pumped out, the No. n backwash control valve (12) and the No. n backwash control pump (13) are opened to backwash the filter (8) with the water in the No. n oil-water stratification tank (2), and the waste liquid from the backwashing is discharged into the sewage tank (18); when the backwash control valve (12) is opened, the inlet valve (9) of the oil-water stratification tank is in a closed state; When the liquid in the No. n oil-water stratification tank (2) is completely drained, the outlet valve (6), the outlet pump (7) and the No. n oil-water stratification tank inlet valve (9) are opened again; when the No. n liquid level sensor detects that the No. n oil-water stratification tank (2) has reached the full liquid level again, the No. n oil-water stratification tank inlet valve (9) is closed; During the operation of steps S4-S7, the plurality of oil-water stratification tanks (2) cyclically pump the upper layer of liquid into the oil-water separation tank (3), and the water in the oil-water separation tank (3) enters the water collection tank (4) through the permeable membrane wall (5); at the same time, the heating device (15) heats the liquid in the oil-water separation tank (3) to the boiling point of water, and the water vapor rises to the water guide plate (16) and condenses into water, and the water enters the water collection tank (4) along the water guide groove (17); the water collection tank (4) collects clean water.

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