Adjustable anti-shaking offshore oil-water separator

Abstract

The invention discloses an adjustable anti-shaking offshore oil-water separator, which relates to the technical field of marine environmental protection and petrochemical equipment, and comprises an oil-water separation device, a floating platform and an anti-shaking device. The oil-water separation device is fixedly arranged in the middle of the upper side of the floating platform, and the anti-shaking device is arranged on the floating platform. The floating platform comprises a lower floating platform and an upper floating platform, and a fixed bottom plate is fixedly arranged on the upper side of the lower floating platform. A fixing plate is fixedly arranged in the middle of the upper floating platform, and the oil-water separation device is fixedly arranged on the fixing plate. An upper rotary table is rotationally arranged on the lower side of the middle of the fixing plate, and a lower rotary table is rotationally arranged on the upper side of the middle of the fixing bottom plate. And a fixed frame is fixedly arranged between the upper rotary table and the lower rotary table. According to the invention, external energy input is not needed, sea wave impact energy is ingeniously converted into righting torque for stabilizing the platform, the gravity settling process in the oil-water separation device is efficiently carried out on the basis of the stable platform, the oil-water interface is clear, the separation is thorough, and the effluent quality is good.

Description

Technical Field

[0001] This invention relates to the field of marine environmental protection and petrochemical equipment technology, specifically to a high-efficiency oil-water separation device with autonomous stabilization function suitable for marine operating environments and its usage method. Background Technology

[0002] Offshore oil and gas extraction, ship operations, and marine accidents often generate oily wastewater that requires effective treatment. When performing oil-water separation on offshore platforms or floating installations, the continuous sloshing caused by waves is a major challenge affecting separation efficiency. Traditional gravity separators perform well under static or stable conditions, but under wave action, the liquid level inside the separator tilts, and the oil-water interface becomes chaotic, leading to a sharp decline in separation efficiency and excessive oil content in the effluent.

[0003] Currently, there are two main approaches to solving the swaying problem: one is to stabilize the entire platform through rigid mooring or active dynamic positioning systems, but this is costly and energy-intensive; the other is to optimize the internal structure of the separator to enhance its anti-disturbance capability, but this has limited effectiveness under large swaying conditions. Summary of the Invention

[0004] This invention aims to overcome the shortcomings of existing technologies and provide an adjustable anti-sway offshore oil-water separator and its method. This separator can convert the energy of wave impact into its own stable power, automatically suppressing platform tilt and creating a stable environment for gravity separation of oil and water, thereby achieving efficient and continuous offshore oil-water separation operations.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An adjustable anti-sway marine oil-water separator includes an oil-water separation device, a floating platform, and an anti-sway device. The oil-water separation device is fixedly installed on the upper middle part of the floating platform, and the anti-sway device is installed on the floating platform.

[0007] The floating platform includes a lower floating platform and an upper floating platform, with a space between them and the lower floating platform located directly below the upper floating platform. A fixed base plate is fixedly installed on the upper side of the lower floating platform. A fixed plate is fixedly installed in the middle of the upper floating platform, and the oil-water separator is fixedly installed on this fixed plate. An upper turntable is rotatably installed on the lower middle side of the fixed plate, and a lower turntable is rotatably installed on the upper middle side of the fixed base plate. A fixed frame is fixedly installed between the upper and lower turntables. An external frame is fixedly installed on the outer side of the upper floating platform.

[0008] The anti-sway device includes a circular guide rail fixedly mounted on the outside of the outer frame. A guide block is slidably mounted on the circular guide rail and is fixedly connected to the upper turntable via a fixed bracket. A float is slidably mounted on the guide block. A fixed frame is fixedly mounted at the bottom of the guide block, and a first pulley is rotatably mounted on the fixed frame. A second pulley is rotatably mounted on the upper part of the fixed frame. An upwardly curved arc plate is hinged to the bottom of the fixed frame, extending towards the side where the float is mounted. A third pulley is slidably mounted on the lower side of the arc plate. A steel wire rope is connected to the upper part of the float, and the other end of the steel wire rope is fixedly connected to the bottom of the fixed frame. The steel wire rope starts from one side of the float, passes through the first pulley, the second pulley, and the third pulley in sequence, and finally connects back to the bottom of the fixed frame. A through groove is provided in the middle of the arc plate corresponding to the position of the third pulley, and the middle part of the steel wire rope passes through this through groove.

[0009] Preferably, a frustum-shaped floating platform is provided on the upper side of the fixed base plate to provide auxiliary buoyancy and optimize water flow.

[0010] Preferably, a reinforcing bracket is fixedly installed between the outer frame and the fixed base plate to enhance the overall structural strength.

[0011] Preferably, the lower part of the float is provided with an inclined surface that tilts toward the space.

[0012] Preferably, the upper cross section of the float is trapezoidal or triangular to optimize its hydrodynamic characteristics in water.

[0013] Preferably, the oil-water separator includes an oil-water tank. A belt conveyor frame is fixedly mounted on the upper part of the oil-water tank. A first pulley is rotatably mounted on the upper end of the belt conveyor frame, and a second pulley is rotatably mounted on the lower end, the second pulley being submerged below the liquid surface in the oil-water tank. A conveyor belt is fitted between the first and second pulleys. A motor driving the first pulley is fixedly mounted on the belt conveyor frame. A scraper is fixedly mounted on the upper part of the belt conveyor frame, near the conveyor belt, and an inclined guide plate is fixedly mounted on its lower part. A separation chamber is fixedly mounted on the upper side of the oil-water tank, below the end of the inclined guide plate. A partition is fixedly mounted on the lower part of the inner side of the separation chamber, dividing the chamber into a first compartment and a second compartment. A gap is left between the lower end of the partition and the bottom of the chamber, and a filter screen is installed therein. The upper parts of the first and second compartments are interconnected. The upper part of the first compartment faces the outlet of the inclined guide plate. A conduit is fixedly mounted vertically on the lower side of the second compartment, the lower end of the conduit extending into the oil-water tank.

[0014] Preferably, a discharge port is provided at the lower part of the first compartment, and a discharge valve is installed on the discharge port. A receiving box is provided on the upper side of the oil and water tank below the discharge port.

[0015] Preferably, a baffle is vertically provided at the upper end of the conduit.

[0016] Based on the same inventive concept, the present invention also provides a method for oil-water separation using the above-mentioned adjustable anti-sway marine oil-water separator, comprising the following steps:

[0017] S1. Preparation for offshore operations: Place the separator in the sea area to be treated, immerse the space between the lower and upper floating platforms and the floats in the seawater, and introduce the oil-water mixture to be treated into the oil-water tank.

[0018] S2, Anti-sway Stability Response: When waves impact the separator from one side, seawater enters the interstitial space and impacts the arc-shaped plate, forcing it to rotate downwards; the arc-shaped plate, through the transmission of the third pulley, wire rope, second pulley, and first pulley, pulls the float located on the opposite side of the impact direction downwards; the increased buoyancy of the float moving downwards generates a lifting torque on the opposite side of the floating platform, resisting the tilt caused by the wave impact and maintaining the stability of the platform;

[0019] S3, Oil Phase Lifting and Primary Separation: Start the motor to drive the conveyor belt; the conveyor belt lifts the floating oil in the upper layer of the oil-water tank to the top, and after being scraped off by the scraper, it is guided by the inclined guide plate to the first chamber of the separation box; the oil and water settle in the first chamber, and the oil phase floats and accumulates.

[0020] S4. Aqueous phase infiltration and secondary separation: The aqueous phase in the first chamber sinks under the action of gravity and enters the second chamber through the filter screen at the lower end of the partition; a small amount of oil droplets carried in the aqueous phase continue to float in the second chamber and accumulate on the upper liquid surface.

[0021] S5, Water phase reflux: When the water phase level in the second compartment accumulates to exceed the upper end of the conduit, the water phase flows back to the oil and water tank through the conduit under the action of static pressure difference; the baffle at the upper end of the conduit prevents the floating oil in the upper part of the second compartment from entering the conduit;

[0022] S6. Secondary oil phase recovery: The floating oil accumulated in the upper part of the second compartment, as the liquid level rises, overflows back into the oil layer of the first compartment through the upper connecting channel between the second compartment and the first compartment.

[0023] S7. Finished Oil Collection: When the oil phase collected in the first chamber reaches the predetermined liquid level, the unloading valve is opened to discharge the oil phase into the receiving box through the unloading port to complete the recovery.

[0024] Compared with the prior art, the present invention has the following significant advantages:

[0025] Adaptive passive anti-sway: The mechanical linkage anti-sway device does not require external energy input. It cleverly converts the impact energy of the waves into a righting torque to stabilize the platform, achieving "wave-to-wave control" and reducing platform sway.

[0026] High separation efficiency: Based on a stable platform, the gravity sedimentation process in the oil-water separator can be carried out efficiently, resulting in a clear oil-water interface, thorough separation, and good effluent quality.

[0027] Dynamic cyclic purification: A dynamic path of "aqueous phase reflux" and "oil phase re-merging" was designed to enable the separation process to continue and self-purify, thereby improving the oil recovery rate and water purification degree.

[0028] Compact and reliable structure: The anti-sway mechanism is highly integrated with the platform and separator, with a simple structure, reliable mechanical transmission, suitable for harsh marine environments, and easy to maintain.

[0029] Adjustability: By adjusting the angle of the arc plate, the size of the float, and the length of the wire rope, it can adapt to different sea conditions and is flexible in application. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall planar structure of the present invention.

[0032] Figure 2 This is a top view of the oil-water separation device of the present invention.

[0033] Figure 3 This is a partial structural diagram of the present invention.

[0034] Figure 4 This is a partial cross-sectional view of the oil-water separation device of the present invention.

[0035] Figure 5 This is a schematic diagram of the combined structure of the separation box and the receiving box of the present invention.

[0036] Figure label annotations:

[0037] 1-Oil-water separator; 101-Oil-water tank; 102-Belt conveyor frame; 103-First pulley; 104-Second pulley; 105-Conveyor belt; 106-Motor; 107-Scraper; 108-Inclined guide plate; 109-Separation box; 110-Baffle; 111-First compartment; 112-Second compartment; 113-Filter screen; 114-Conduit; 115-Discharge port; 116-Discharge valve; 117-Receiving box; 118-Baffle;

[0038] 2-Floating platform; 201-Lower floating platform; 202-Upper floating platform; 203-Gap space; 204-Fixed bottom plate; 205-Fixed plate; 206-Upper turntable; 207-Lower turntable; 208-Fixed frame; 209-External frame; 210-Frustum-shaped floating platform; 211-Reinforcing support;

[0039] 3-Anti-sway device; 301-Circular guide rail; 302-Guide block; 303-Fixed bracket; 304-Floating block; 305-Fixed frame; 306-First pulley; 307-Second pulley; 308-Arc plate; 309-Third pulley; 310-Wire rope; 311-Through groove; 312-Inclined surface. Detailed Implementation

[0040] The following embodiments will describe the present invention in detail with reference to the accompanying drawings. In the drawings or description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this invention are merely illustrative and not intended to limit the scope of the invention. Any obvious modifications or changes made to this invention do not depart from the spirit and scope of the invention.

[0041] like Figure 1 As shown, the adjustable anti-sway marine oil-water separator provided by the present invention mainly consists of three functional modules: oil-water separation device 1, floating platform 2, and anti-sway device 3.

[0042] like Figures 1 to 3 As shown, the floating platform 2 forms the base of the entire equipment. It adopts a double-layer floating design, including a lower floating platform 201 and an upper floating platform 202, with a key space 203 between them. The lower floating platform 201 provides the main buoyancy, and a fixed base plate 204 is fixed to its top. A fixed plate 205 is fixed to the center of the top of the upper floating platform 202 to support the oil-water separator 1. An upper turntable 206 is rotatably mounted under the fixed plate 205, and a lower turntable 207 is rotatably mounted on the fixed base plate 204. The two are connected by a rigid fixed frame 208, which can rotate between the lower floating platform 201 and the upper floating platform 202 via the upper turntable 206 and the lower turntable 207. An external frame 209 is also fixed around the upper floating platform 202. To further optimize performance, a frustum-shaped floating platform 210 can be added to the fixed base plate 204 to assist stability and better increase seawater gathering effect. A reinforcing bracket 211 can be set between the external frame 209 and the fixed base plate 204 to enhance rigidity.

[0043] like Figures 1 to 3As shown, the anti-sway device 3 is the core innovation of this invention, cleverly installed on the floating platform 2. A circular guide rail 301 is fixed to the outside of the outer frame 209. The guide block 302 is slidably fitted onto the circular guide rail 301 and is fixed to the upper turntable 206 via a fixed bracket 303. Therefore, the guide block 302 can rotate around the upper floating platform 202 via the circular guide rail 301, and the float is always located on the wave-side of the upper floating platform 202 when impacted by waves. A float 304 that can slide freely up and down is installed on the guide block 302, and the lower part of the float 304 can be submerged in seawater. A fixed frame 305 is connected to the bottom of the float 304, on which a first pulley 306 is mounted. A second pulley 307 is installed on the upper part of the internal fixed frame 208, and an arc-shaped plate 308 is installed at the bottom via a hinge. The arc-shaped plate 308 is initially tilted upwards and extends towards the side where the float 304 is located. A third pulley 309, which can slide along, is installed on the lower side of the curved plate 308. One end of the steel wire rope 310 is fixed to the top of the float 304, then passes down over the first pulley 306, then over the second pulley 307, then down over the third pulley 309, and finally the other end is fixed to the bottom of the fixed frame 208. A through groove 311 is opened on the curved plate 308, through which the middle section of the steel wire rope 310 passes. The bottom of the float 304 is preferably machined with an inclined surface 312 that slopes towards the space 203, and its cross-section can be designed as trapezoidal to optimize the hydraulic response during wave impact.

[0044] like Figure 4 and Figure 5 As shown, the oil-water separator 1 is securely mounted on the fixed plate 205. Its main body is an oil-water tank 101, used to store the mixture to be processed. A belt conveyor frame 102 is mounted on the upper part of the tank, with a conveyor belt 105 wrapped between the first pulley 103 and the second pulley 104 at its upper and lower ends, driven by a motor 106. A scraper 107 is provided at the discharge point at the top of the conveyor belt 105, and an inclined guide plate 108 is provided below it. The outlet of the inclined guide plate 108 connects to the first compartment 111 of the separator 109. The interior of the separator 109 is divided into a first compartment 111 and a second compartment 112 by a partition 110, with their upper parts connected. A filter screen 113 is provided at the gap between the bottom of the partition 110 and the bottom of the tank. A conduit 114 is vertically installed at the bottom of the second compartment 112, with its lower end extending back into the oil-water tank 101. A baffle 118 is provided at the upper end of the conduit 114 to prevent oil accumulated in the upper part of the second chamber 112 from being squeezed into the conduit 114. The bottom of the first chamber 111 is provided with a discharge port 115 with a discharge valve 116, and a receiving box 117 is placed below it.

[0045] Working principle and process:

[0046] like Figures 1 to 5 As shown, the separator operates as follows:

[0047] First, prepare for offshore operations (S1): Deploy the entire system to the work site, immerse the space 203 and the float 304 in seawater, and pump oily wastewater into the oil and water tank 101.

[0048] When the waves (such as) Figure 2 (Illustrative) When impacting the platform, the anti-sway stabilization response (S2) is activated: Seawater rushes into the partition space 203, concentrating its impact on the upper surface of the arc-shaped plate 308, forcing it to rotate downwards around the hinge point. The rotation of the arc-shaped plate 308 drives the third pulley 309 to move, which, through the transmission of the taut steel cable 310, the second pulley 307, and the first pulley 306, ultimately generates a force acting on the float 304, pulling it downwards. The submersion of the float 304 increases its displacement volume, generating an instantaneous increase in buoyancy. This increased buoyancy acts on the leeward side of the platform, forming a strong lifting moment to counteract the sinking moment caused by the waves on the wave-facing side, thereby allowing the platform to quickly regain balance and reducing rolling. At the same time, the seawater that flows out towards the back wave side after impacting the arc plate 308 will impact the inclined surface 312 at the bottom of the float 304, giving the float 304 an upward auxiliary force. The float 304, through the wire rope, the first guide wheel and the fixing frame 305, gives the floating platform an upward pulling force on the back wave side, further enhancing the stability effect.

[0049] Once a stable platform is established, the oil-water separation process continues:

[0050] Oil phase lifting and primary separation (S3): The motor 106 is started, and the conveyor belt 105 lifts the floating oil accumulated on the surface of the oil-water tank 101 to the top, where it is scraped off by the scraper 107 and smoothly introduced into the first compartment 111 of the separation tank 109 by the inclined guide plate 108. In this compartment, the oil-water mixture obtains a calm settling environment, and the oil phase quickly floats to the top and accumulates.

[0051] Aqueous phase infiltration and secondary separation (S4): The aqueous phase (and a small amount of emulsified oil) in the lower part of the first compartment 111 sinks under gravity and enters the second compartment 112 through the filter screen 113. The filter screen 113 can intercept any possible solid particles. In the aqueous phase entering the second compartment 112, the remaining tiny oil droplets will continue to float slowly and accumulate on the upper liquid surface of the compartment.

[0052] Water phase reflux (S5): The water phase level in the second compartment 112 gradually rises. When the level exceeds the upper port of the conduit 114, the relatively clean water flows back to the lower part of the oil and water tank 101 through the conduit 114 under the action of static pressure difference. The baffle 118 at the upper end of the conduit 114 effectively prevents the floating oil accumulated on the upper part of the liquid surface in the second compartment 112 from being sucked into the conduit.

[0053] Secondary oil phase recovery (S6): The floating oil that accumulates on the upper part of the second compartment 112 will naturally overflow back into the first compartment 111 through its connecting channel with the upper part of the first compartment 111 as the total liquid level of the compartment rises (due to continuous water ingress), and merge with the main oil layer, ensuring full recovery of oil.

[0054] Finished oil collection (S7): When the amount of separated oil collected in the first compartment 111 reaches a certain level, the discharge valve 116 is opened, and the pure oil phase is discharged into the receiving box 117 below through the discharge port 115, completing the recovery. Thus, an efficient and continuous oil-water separation cycle is completed.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adjustable anti-sway marine oil-water separator, characterized in that, It includes an oil-water separator (1), a floating platform (2), and an anti-sway device (3). The oil-water separator (1) is fixedly installed on the upper middle part of the floating platform (2), and the anti-sway device (3) is installed on the floating platform (2). The floating platform (2) includes a lower floating platform (201) and an upper floating platform (202). A space (203) is provided between the lower floating platform (201) and the upper floating platform (202), and the lower floating platform (201) is located directly below the upper floating platform (202). A fixed base plate (204) is fixedly provided on the upper side of the lower floating platform (201). A fixed plate (205) is fixedly provided in the middle position of the upper floating platform (202). The oil-water separator (1) is fixedly provided on the fixed plate (205). An upper turntable (206) is rotatably provided on the lower middle side of the fixed plate (205). A lower turntable (207) is rotatably provided on the upper middle side of the fixed base plate (204). A fixed frame (208) is fixedly provided between the upper turntable (206) and the lower turntable (207). An outer frame (209) is fixedly provided on the outer side of the upper floating platform (202). The anti-sway device (3) includes a circular guide rail (301) fixedly mounted on the outer side of the outer frame (209). A guide block (302) is slidably mounted on the circular guide rail (301). The guide block (302) is fixedly connected to the upper turntable (206) through a fixed bracket (303). A float (304) is slidably mounted on the guide block (302). A fixed frame (305) is fixedly mounted at the bottom of the slider. A first pulley (306) is rotatably mounted on the fixed frame (305). A second pulley (307) is rotatably mounted on the upper part of the fixed frame (208). An upwardly curved arc plate (308) is hinged to the bottom of the fixed frame (208). The plate (308) extends to the side where the float (304) is located. A third pulley (309) is slidably provided on the lower side of the arc plate (308). A steel wire rope (310) is connected to the upper part of the float (304). The other end of the steel wire rope (310) is fixedly connected to the bottom of the fixed frame (208). The steel wire rope (310) passes through the first pulley (306), the second pulley (307) and the third pulley (309) in sequence from one side of the floating platform and is connected to the bottom of the fixed frame (208). A through groove (311) is provided in the middle of the arc plate (308) corresponding to the position of the third pulley (309). The middle part of the steel wire rope (310) is located inside the through groove (311).

2. An adjustable anti-sway marine oil-water separator according to claim 1, characterized in that, A frustum-shaped floating platform (210) is provided on the upper side of the fixed base plate (204).

3. An adjustable anti-sway marine oil-water separator according to claim 1, characterized in that, A reinforcing bracket (211) is fixedly installed between the external frame (209) and the fixed base plate (204).

4. An adjustable anti-sway marine oil-water separator according to claim 1, characterized in that, The lower part of the float (304) is provided with an inclined surface (312) that is inclined toward the space (203).

5. An adjustable anti-sway marine oil-water separator according to claim 4, characterized in that, The upper cross section of the float (304) is trapezoidal or triangular.

6. An adjustable anti-sway marine oil-water separator according to claim 1, characterized in that, The oil-water separation device (1) includes an oil-water tank (101). A belt conveyor frame (102) is fixedly installed on the upper part of the oil-water tank (101). A first pulley (103) is rotatably installed on the upper end of the belt conveyor frame (102), and a second pulley (104) is rotatably installed on the lower end of the belt conveyor frame (102). The second pulley (104) is located inside the water tank. A conveyor belt (105) is installed between the first pulley (103) and the second pulley (104). A motor (106) that drives the first pulley (103) to rotate is fixedly installed on the belt conveyor frame (102). A scraper (107) is fixedly installed on the upper part of the belt conveyor frame (102) and on the side close to the conveyor belt (105). A scraper (107) is fixedly installed on the upper part of the belt conveyor frame (102) and below the scraper (107). An inclined guide plate (108) is fixedly installed on the side of the oil and water tank (101) and below one end of the inclined guide plate (108). A separation box (109) is fixedly installed on the lower inner side of the separation box (109). The partition plate (110) divides the interior of the separation box (109) into a first compartment (111) and a second compartment (112). A filter screen (113) is installed between the lower end of the partition plate (110) and the bottom inner side of the separation box (109). The upper parts of the first compartment (111) and the second compartment (112) are connected. The upper part of the first compartment (111) is directly below one end of the inclined guide plate (108). A conduit (114) is fixedly installed vertically on the lower inner side of the second compartment (112). The lower end of the conduit (114) extends into the interior of the oil and water tank (101).

7. An adjustable anti-sway marine oil-water separator according to claim 5, characterized in that, The lower part of the first compartment (111) is provided with a discharge port (115), and a discharge valve (116) is provided on the discharge port (115). A receiving box (117) is provided on the upper side of the oil and water tank (101) and below the discharge port (115).

8. An adjustable anti-sway marine oil-water separator according to claim 5, characterized in that, A baffle (118) is vertically installed at the upper end of the conduit (114).

9. A method for oil-water separation using an adjustable anti-sway marine oil-water separator as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Preparation for offshore operations: Place the adjustable anti-sway offshore oil-water separator in the sea area to be treated, immerse the space (203) between the lower floating platform (201) and the upper floating platform (202) and the float (304) in seawater, and introduce the oil-water mixture to be treated into the oil-water tank (101). S2, Anti-sway Stability Response: When waves impact the separator from one side, seawater enters the space (203) and impacts the arc plate (308), forcing the arc plate (308) to rotate downwards; the arc plate (308) is driven by the third pulley (309), the wire rope (310), the second pulley (307) and the first pulley (306), pulling the float (304) located on the back side of the impact direction downwards; the increased buoyancy of the float (304) as it moves downwards generates a lifting torque on the back side of the floating platform (2) to resist the tilt caused by the impact of the waves and maintain the stability of the platform; S3, Oil Phase Lifting and Primary Separation: Start the motor (106) to drive the conveyor belt (105) to run; the conveyor belt (105) lifts the floating oil in the upper layer of the oil-water tank (101) to the top, and after being scraped off by the scraper (107), it is guided by the inclined guide plate (108) to the first compartment (111) of the separation box (109); the oil and water settle in the first compartment (111), and the oil phase floats up and accumulates; S4. Aqueous phase infiltration and secondary separation: The aqueous phase in the first chamber (111) sinks under the action of gravity and enters the second chamber (112) through the filter screen (113) at the lower end of the partition (110); a small amount of oil droplets carried in the aqueous phase continue to float in the second chamber (112) and accumulate on the upper liquid surface. S5, Water phase reflux: When the water phase level in the second compartment (112) accumulates to exceed the upper port of the conduit (114), the water phase refluxes back to the oil and water tank (101) through the conduit (114) under the action of static pressure difference; the baffle (118) at the upper end of the conduit (114) prevents the floating oil in the upper part of the second compartment (112) from entering the conduit (114). S6, Secondary oil phase recovery: The floating oil accumulated in the upper part of the second compartment (112) overflows back into the oil layer of the first compartment (111) through the upper connecting channel between the second compartment (112) and the first compartment (111) as the liquid level rises; S7. Finished oil collection: When the oil phase collected in the first compartment (111) reaches the predetermined liquid level, the unloading valve (116) is opened, and the oil phase is discharged into the receiving box (117) through the unloading port (115) to complete the recycling.

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