A continuous oil-water automatic separator and a method of using the same

Abstract

The application discloses a continuous oil-water automatic separator and a use method thereof, and relates to the technical field of oil-water separators, which comprises a separator shell, a water inlet pipeline is fixedly connected to the top of one side of the separator shell; through the arrangement of a water inlet cavity, a discharge cavity, a connecting cavity, a circulating liquid inlet, a circulating discharge outlet and a treatment cavity, waste water is circulated in the oil-water separator, thereby continuously contacting with gas in the aeration device, oil in the waste water is carried to the top of the liquid surface through the gas bubbles, the continuous treatment of waste water oil-water separation is completed, the circulation flow makes the waste water and the gas bubbles fully mix, the local dead angle or short flow phenomenon is avoided, the probability of oil droplets being captured by the gas bubbles is maximized, and meanwhile, through the arrangement of the circular baffle, the annular filter plate and the positioning piece, the direct contact of the gas bubbles with the circulating liquid inlet and the circulating discharge outlet in the waste water aeration treatment process is avoided, so that the gas bubbles carrying the oil re-entering the waste water circulation treatment process is avoided.

Description

Technical Field

[0001] This invention relates to the field of oil-water separator technology, specifically to a continuous automatic oil-water separator and its usage method. Background Technology

[0002] An oil-water separator is a device that uses physical or chemical principles to separate oil (such as crude oil, fuel oil, and waste cooking oil) from water (such as wastewater and oily sewage). Its core objective is to achieve efficient oil and water separation, reduce environmental pollution, and simultaneously recover valuable oil resources.

[0003] The existing authorized patent CN116161742B, "An oil-water separator for collecting waste oil," describes a valve body containing "a main chamber, a first secondary chamber, and a second secondary chamber, both surrounding the main chamber and annular in shape; an air inlet connector connected to the main chamber and supplying air to the main chamber; a water inlet connector connected to the first secondary chamber; and a water outlet connector connected to the second secondary chamber. Multiple openings are provided on the inner walls of both the first and second secondary chambers, communicating with the main chamber, and the first secondary chamber is located above the second secondary chamber." The valve body has a third auxiliary chamber located above the first auxiliary chamber. Multiple oil guiding channels are formed on the inner wall of the third auxiliary chamber. Multiple sliding grooves are formed in a ring on the inner wall of the main chamber. The sliding grooves are vertical, and the openings of the oil guiding channels are located on the inner wall of the sliding grooves. This achieves the characteristics of "simple structure, small size, small space occupation, convenient installation and use, low cost, and can be directly installed in pipelines to perform oil-water separation treatment of wastewater in pipelines. It greatly reduces the various restrictions on oil-water separation equipment, improves the convenience and popularity of use, and accelerates the oil-water separation speed and has high working efficiency".

[0004] In actual use, the aeration device introduces gas from the bottom of the main chamber to aerate the wastewater. Since the first secondary chamber is connected to the main chamber through a port, even if the port diameter is small and the port is inclined, the process of the bubbles carrying oil moving upward in the wastewater is uncontrollable. Moreover, the bubbles are of different sizes, and some bubbles will still enter the first secondary chamber through the port. This causes the oil in the bubbles to re-enter the wastewater circulation or be discharged into the oil-water separator. After the device is used, the oil and other impurities contained in the wastewater will remain inside the oil-water separator, affecting the next use of the device.

[0005] To address this issue, we propose a continuous automatic oil-water separator and its application method. Summary of the Invention

[0006] Technical problem to be solved: In view of the above, and in view of the shortcomings of the prior art, the present invention provides a continuous automatic oil-water separator and its usage method to solve the problems mentioned in the background art.

[0007] Technical solution: To achieve the above objectives, the present invention provides the following technical solution: a continuous oil-water automatic separator, comprising a separator housing, an inlet pipe fixedly connected to the top of one side of the separator housing, a drain pipe fixedly installed at the bottom of the other side of the separator housing, a filter disc fixedly installed inside the drain pipe, and a wastewater circulation component disposed inside the separator housing.

[0008] The wastewater circulation assembly includes an inlet chamber located inside the separator housing, a discharge chamber located at the bottom of the separator housing, the inlet chamber being above the discharge chamber, a connecting chamber located inside the separator housing, an annular baffle fixedly connected to the top wall of the inlet chamber, a circulation inlet on the side wall of the inlet chamber, a circulation outlet on the side wall of the discharge chamber, a treatment chamber vertically located at the center of the separator housing, a circular baffle slidably connected to the side wall of the treatment chamber, an annular filter plate detachably fixedly installed at the bottom of the circular baffle, a positioning component detachably fixedly installed on the bottom surface of the annular filter plate, symmetrically fixedly connected to limiting components vertically inside the positioning components, a turbulence fan rotatably connected between the centers of the two limiting components, and an aeration pipe fixedly connected through the center of the bottom of the separator housing.

[0009] Preferably, the inlet pipe consists of two sections of pipe at different horizontal heights connected together, with the vertical height of the end of the inlet pipe furthest from the separator housing being higher than that of the end of the inlet pipe closest to the separator housing. The outlet pipe also consists of two sections of pipe at different horizontal heights connected together, with the vertical height of the end of the outlet pipe furthest from the separator housing being higher than that of the end of the outlet pipe closest to the separator housing. Two filter discs are provided, located in the two sections of the outlet pipe respectively. The inlet chamber and the outlet chamber are connected through a connecting chamber. The inlet chamber is connected to the treatment chamber through a circulation inlet, and the outlet chamber is connected to the treatment chamber through a circulation outlet. The inlet pipe is connected to the inlet chamber, and the outlet pipe is connected to the outlet chamber.

[0010] Preferably, the sidewalls of both the inlet chamber and the outlet chamber are provided with spiral channels. The cross-section of the connecting chamber is composed of two symmetrically arranged isosceles trapezoids and a rectangle between the two isosceles trapezoids. The size of the two isosceles trapezoids at the ends away from each other is larger than the size of the ends close to each other. The inlet chamber, the outlet chamber, and the connecting chamber are all arranged around the outside of the treatment chamber.

[0011] Preferably, the annular baffle, the annular filter plate, and the positioning element are all located inside the treatment chamber. The annular filter plate has a rubber gasket on its outer ring. The size of the annular filter plate is adapted to the circulating liquid inlet. The positioning element is hollow inside. The cross-section of the positioning element consists of two rectangles of different sizes and an isosceles trapezoid located between the two rectangles. The size of the upper rectangle in the vertical direction is larger than that of the lower rectangle. The limiting element is set as a hexagonal frame structure. The aeration pipe passes through the separator shell and is connected to the treatment chamber.

[0012] Preferably, it also includes a snap-fit ​​assembly disposed inside the separator housing;

[0013] The snap-fit ​​assembly includes symmetrically opened positioning grooves on the top wall of the processing chamber. Each positioning groove is snapped with a pressing block, and a compression spring is fixedly connected to one end of each pressing block that is close to each other.

[0014] The pressing blocks are symmetrically arranged with reference to the vertical central axis of the circular baffle. The ends of the pressing blocks that are close to each other are fixedly connected to the outer surface of the top of the circular baffle, and the ends of the compression springs that are away from the pressing blocks are fixedly connected to the outer surface of the circular baffle.

[0015] Preferably, it also includes a discharge assembly disposed inside the annular baffle;

[0016] The discharge assembly includes vertical slots symmetrically formed on the inner wall of a circular baffle. A positioning groove is symmetrically formed on the inner wall of the circular baffle, and a telescopic spring is fixedly connected to the bottom wall of each positioning groove. The vertical slots and positioning grooves are staggered inside the circular baffle. A gas overflow component is slidably connected to the interior of both the vertical slots and the positioning grooves. A cylindrical moving rod is fixedly connected to the bottom end of the gas overflow component. An oil baffle is fixedly connected to the inner wall of the bottom end of the gas overflow component. Oil outlets are formed through both ends of the circular baffle. Oil storage chambers are symmetrically formed inside the separator housing, and oil discharge pipes are fixedly connected to the outer walls of both ends of the separator housing.

[0017] Preferably, the two oil outlets are respectively connected to the vertical slots, and the oil outlets are connected to the oil storage chamber. The cross-section of the oil storage chamber is a combination of a rectangle at the top and a trapezoid at the bottom, and the trapezoidal part of the oil storage chamber is connected to the oil discharge pipe through one end of the separator shell.

[0018] Preferably, it also includes a separation component disposed inside the annular baffle;

[0019] The separation assembly includes a driven plate fitted below the gas overflow component. A cylindrical driven member is fixedly connected to the center of the bottom end of the driven plate. The cylindrical driven member is hollow inside and has a spiral groove in its inner wall. A driven slider is fixedly connected to the side wall of the cylindrical moving rod. A connecting rod is symmetrically connected to the outer wall of the bottom end of the cylindrical driven member with reference to the center of the cylindrical driven member. A swing scraper is fixedly connected to the end of the connecting rod away from the cylindrical driven member. A limit rod is fixedly connected to the inner wall of the annular baffle. A connecting rod is symmetrically fixedly connected to the top surface of the limit rod.

[0020] Preferably, both the gas overflow component and the driven plate have through holes, and the through holes on the gas overflow component and the driven plate are staggered. The cylindrical moving rod is slidably connected to the inside of the cylindrical driven component, the driven slider is slidably connected to the inside of the spiral groove, the bottom end of the cylindrical driven component is rotatably connected to the middle of the limiting rod, and the top end of the connecting rod is rotatably connected to the swing scraper. The swing scraper is centrally symmetrical about the center of the cylindrical driven component, and the connection point of the connecting rod and the swing scraper is close to the connection point of the swing scraper and the connecting rod.

[0021] Preferably, the continuous automatic oil-water separator and its usage method include the following steps:

[0022] Step 1: Connect the inlet pipe to the external wastewater discharge pipe, connect the outlet pipe to the external treated wastewater discharge pipe, and connect the aeration pipe to the external aeration device. Introduce gas into the separator shell through the aeration pipe.

[0023] Step 2: The wastewater to be treated enters the inlet chamber through the inlet pipe, and then enters the outlet chamber through the inlet chamber and the connecting chamber. Finally, it enters the treatment chamber through the circulation outlet.

[0024] Step 3: The gas introduced into the treatment chamber through the aeration pipe comes into contact with the wastewater inside the treatment chamber to aerate the wastewater and carry the oil in the wastewater to the surface.

[0025] Step 4: The wastewater level rises in the positioning component, and the wastewater flows back into the inlet chamber through the annular filter plate and the circulation inlet. It then mixes with the wastewater in the inlet chamber and enters the treatment chamber again through the connecting chamber, the discharge chamber, and the circulation outlet to complete the circulation.

[0026] Step 5: The wastewater level inside the positioning component rises, the oil baffle rises, the gas overflow component rises, and the swing scraper swings, scraping the oil on the surface of the wastewater through the oil outlet into the oil storage chamber, and then discharging it through the oil discharge pipe. The oil-water separation treatment of the wastewater is completed.

[0027] Step 6: The wastewater after multiple aeration treatments is discharged from the separator shell through the filter disc and drainage pipe.

[0028] Beneficial effects: Compared with the prior art, the present invention provides a continuous automatic oil-water separator and its usage method, which has the following beneficial effects:

[0029] The design incorporates an inlet chamber, an outlet chamber, a connecting chamber, a circulating inlet, a circulating outlet, and a treatment chamber. This allows the wastewater to circulate within the oil-water separator, continuously contacting the gas within the aeration device. The gas bubbles carry the oil in the wastewater to the top of the liquid surface, completing the continuous oil-water separation process. The circulating flow ensures thorough mixing of the wastewater and bubbles, preventing dead zones or short-circuiting and maximizing the probability of oil droplets being captured by the bubbles. Furthermore, the use of circular baffles, annular filter plates, and positioning components prevents direct contact between the bubbles and the circulating inlet and outlet during wastewater aeration, thus preventing the bubbles from carrying oil back into the wastewater recycling process.

[0030] By setting up the positioning components, when wastewater flows from the small rectangular channel below into the large rectangular channel above, the flow velocity gradually decreases. The low-speed flow can reduce the shear force on the aeration bubbles, avoid bubble breakage or dispersion, maintain the stable adsorption of bubbles and oil droplets, and the isosceles trapezoidal area forms a "contraction-expansion" structure, generating a slight eddy, promoting gas-liquid mixing, increasing the contact probability of oil droplets and bubbles, and the low flow velocity in the large rectangular channel above makes it easy for the oil layer to accumulate on the liquid surface.

[0031] By setting up limiting components and turbulence fans, the smooth sides and symmetry of the hexagonal frame of the limiting components can reduce the separation of the fluid boundary layer and reduce the turbulence intensity, allowing wastewater to pass through in a laminar or low-turbulence state, which is conducive to the stable adsorption of bubbles and oil droplets inside the positioning component. At the same time, as the bubbles in the wastewater continue to rise and the liquid flows, the blades of the turbulence fan will rotate inside the positioning component under the action of bubbles and liquid. The turbulence fan generates micro eddies during the flow of wastewater, which promotes the uniform mixing of bubbles, oil droplets and solid particles. The eddies can break the stagnant layer around the oil droplets, accelerate the collision efficiency of bubbles and oil droplets, and improve the oil removal rate.

[0032] By using a swing scraper, oil on top of the liquid surface can be scraped off in conjunction with the swing operation. With the oil outlet and oil storage chamber in place, oil is prevented from flowing back to the top of the wastewater after scraping. By actively scraping instead of passively separating, the swing scraper actively pushes the oil layer with mechanical force, which can shorten the oil layer removal time. The smooth pushing action of the swing scraper can reduce the shear force on the oil layer, preventing oil droplets from breaking into smaller particles and redispersing. In addition, the oil storage chamber is isolated from the wastewater area to prevent oil from flowing back to the top of the wastewater due to water flow disturbance or temperature changes.

[0033] The positioning groove, pressing block, and compression spring design allow the annular baffle, annular filter plate, and positioning components to be separable from the separator housing. This enables separate cleaning of each part, preventing oil buildup inside the oil-water separator. The separable design allows for direct cleaning or replacement of contaminated components, reducing oil residue. Furthermore, the detachable arrangement of the annular baffle, annular filter plate, and positioning components ensures that these parts can be removed for cleaning. If any part fails, it is readily replaceable, extending the lifespan of the oil-water separator. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0035] Figure 2 This is a schematic plan view of the internal cross-sectional structure of the separator housing of the present invention;

[0036] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the separator housing of the present invention;

[0037] Figure 4 This is a schematic diagram showing the positional relationship of the limiting component in this invention;

[0038] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0039] Figure 6 This is a schematic diagram of the internal structure of the gas overflow component of the present invention;

[0040] Figure 7 This is a schematic cross-sectional view of the internal structure of the annular baffle of the present invention;

[0041] Figure 8 This is a schematic diagram of the internal structure of the cylindrical follower of the present invention;

[0042] Figure 9 This is a schematic diagram of the connection relationship at the cylindrical follower of the present invention;

[0043] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point B;

[0044] Figure 11 This is a schematic diagram showing the internal details of the gas overflow component of the present invention;

[0045] Figure 12 This is a schematic diagram showing the positional relationship of the oil discharge pipe in this invention;

[0046] Figure 13 This is a schematic diagram showing the location relationship of the oil flow outlet in this invention.

[0047] In the diagram: 11. Separator housing; 12. Inlet pipe; 13. Drain pipe; 14. Filter disc;

[0048] 21. Inlet chamber; 22. Outlet chamber; 23. Connecting chamber; 24. Annular baffle; 25. Circulating inlet; 26. Circulating outlet; 27. Treatment chamber; 2801. Circular baffle; 2802. Annular filter plate; 2803. Positioning component; 2804. Limiting component; 2805. Baffle fan; 29. ​​Aeration pipe; 31. Positioning groove; 32. Pressing block; 33. Compression spring; 41. Vertical slot; 42. Positioning slide; 43. Telescopic spring; 44. Gas overflow component; 45. Cylindrical moving rod; 46. Oil baffle; 47. Oil outlet; 48. Oil storage chamber; 49. Oil discharge pipe; 51. Driven plate; 52. Cylindrical driven component; 53. Spiral groove; 54. Driven slider; 55. Connecting rod; 56. Swinging scraper; 57. Limiting rod; 58. Connecting rod. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1, please refer to Figures 1 to 7 , Figure 11 and Figure 12 A continuous oil-water automatic separator includes a separator housing 11, an inlet pipe 12 fixedly connected to the top of one side of the separator housing 11, a drain pipe 13 fixedly installed on the bottom of the other side of the separator housing 11, a filter disc 14 fixedly installed inside the drain pipe 13, and a wastewater circulation component disposed inside the separator housing 11.

[0051] The wastewater circulation assembly includes an inlet chamber 21 located inside a separator housing 11, a discharge chamber 22 located at the bottom of the separator housing 11, the inlet chamber 21 being above the discharge chamber 22, a connecting chamber 23 located inside the separator housing 11, an annular baffle 24 fixedly connected to the top wall of the inlet chamber 21, a circulation inlet 25 located on the side wall of the inlet chamber 21, a circulation outlet 26 located on the side wall of the discharge chamber 22, and a treatment chamber 2 located vertically at the center of the separator housing 11. 7. A circular baffle 2801 is slidably connected to the side wall of the treatment chamber 27. A ring filter plate 2802 is detachably and fixedly installed at the bottom of the circular baffle 2801. A positioning component 2803 is detachably and fixedly installed on the bottom surface of the ring filter plate 2802. A limiting component 2804 is symmetrically and fixedly connected in a vertical direction inside the positioning component 2803. A turbulence fan 2805 is rotatably connected between the centers of the two limiting components 2804. An aeration pipe 29 is fixedly connected through the center of the bottom of the separator housing 11.

[0052] The inlet pipe 12 consists of two pipes of different horizontal heights connected together. The vertical height of the end of the inlet pipe 12 away from the separator housing 11 is higher than that of the end of the inlet pipe 12 near the separator housing 11. The drain pipe 13 consists of two pipes of different horizontal heights connected together. The vertical height of the end of the drain pipe 13 away from the separator housing 11 is higher than that of the end of the drain pipe 13 near the separator housing 11. There are two filter discs 14, which are located in the two sections of the drain pipe 13 respectively. The inlet chamber 21 and the outlet chamber 22 are connected through the connecting chamber 23. The inlet chamber 21 is connected to the treatment chamber 27 through the circulation inlet port 25. The outlet chamber 22 is connected to the treatment chamber 27 through the circulation outlet port 26. The inlet pipe 12 is connected to the inlet chamber 21, and the drain pipe 13 is connected to the outlet chamber 22.

[0053] The inlet chamber 21 and the outlet chamber 22 are both provided with spiral channels on their side walls. The spiral channels can guide the wastewater to move in a regular swirling motion along the chamber wall, reducing turbulence caused by sudden changes in flow velocity or chaotic direction. The cross-section of the connecting chamber 23 is composed of two symmetrically arranged isosceles trapezoids and a rectangle between the two isosceles trapezoids. The size of the two isosceles trapezoids at the ends away from each other is larger than the size of the ends close to each other. The inlet chamber 21, the outlet chamber 22 and the connecting chamber 23 are all arranged around the outside of the treatment chamber 27.

[0054] The annular baffle 2801, the annular filter plate 2802, and the positioning element 2803 are all located inside the treatment chamber 27. The annular filter plate 2802 has a rubber gasket on its outer ring. The size of the annular filter plate 2802 is adapted to the circulating liquid inlet 25. The positioning element 2803 is hollow inside. The cross-section of the positioning element 2803 consists of two rectangles of different sizes and an isosceles trapezoid located between the two rectangles. The size of the upper rectangle in the vertical direction is larger than that of the lower rectangle. The limiting element 2804 is set as a hexagonal frame structure. The aeration pipe 29 passes through the separator shell 11 and is connected to the treatment chamber 27. The height of the end of the drain pipe 13 away from the separator shell 11 is higher than the height of the circulating outlet 26.

[0055] The annular filter plate 2802 is located at the connection between the processing chamber 27 and the circulation inlet 25. The rubber gasket on the annular filter plate 2802 is used to snap the annular filter plate 2802 into the circulation inlet 25, thereby limiting and fixing the position of the annular filter plate 2802.

[0056] Further examples:

[0057] Please see Figures 2 to 5 The continuous oil-water automatic separator also includes a snap-fit ​​assembly disposed inside the separator housing 11;

[0058] The snap-fit ​​assembly includes positioning grooves 31 symmetrically opened on the top cavity wall of the processing cavity 27. Each positioning groove 31 is snapped with a pressing block 32, and a compression spring 33 is fixedly connected to one end of each pressing block 32 that is close to each other.

[0059] The pressing blocks 32 are symmetrically arranged with reference to the vertical central axis of the circular baffle 2801, and the ends of the pressing blocks 32 that are close to each other are fixedly connected to the outer surface of the top of the circular baffle 2801. The ends of the compression springs 33 that are away from the pressing blocks 32 are fixedly connected to the outer surface of the circular baffle 2801.

[0060] A further embodiment:

[0061] Please see Figures 3 to 9 , Figure 11 , Figure 12 and Figure 13 The continuous oil-water automatic separator also includes a discharge assembly disposed inside the annular baffle 2801;

[0062] The discharge assembly includes vertical slots 41 symmetrically formed on the inner wall of the annular baffle 2801, and positioning grooves 42 symmetrically formed on the inner wall of the annular baffle 2801. A telescopic spring 43 is fixedly connected to the bottom wall of each positioning groove 42. The vertical slots 41 and positioning grooves 42 are staggered inside the annular baffle 2801. A gas overflow component 44 is slidably connected to the interior of both the vertical slots 41 and the positioning grooves 42. A cylindrical moving rod 45 is fixedly connected to the bottom of the center of the gas overflow component 44. An oil baffle 46 is fixedly connected to the inner wall of the bottom of the gas overflow component 44. Oil outlets 47 are formed through both ends of the annular baffle 2801. An oil storage chamber 48 is symmetrically formed inside the separator housing 11. Oil discharge pipes 49 are fixedly connected to the outer walls of both ends of the separator housing 11.

[0063] Among them, the two oil outlets 47 are respectively connected to the vertical slots 41, and the oil outlets 47 are connected to the oil storage chamber 48. The cross-section of the oil storage chamber 48 is set as a combination of a rectangle at the top and a trapezoid at the bottom, and the trapezoidal part of the oil storage chamber 48 is connected to the oil discharge pipe 49 through one end of the separator shell 11.

[0064] A further embodiment:

[0065] Please see Figures 6 to 11 The continuous oil-water automatic separator also includes a separation component disposed inside the annular baffle 2801;

[0066] The separation assembly includes a driven plate 51 fitted below the gas overflow component 44. A cylindrical driven member 52 is fixedly connected to the center of the bottom end of the driven plate 51. The cylindrical driven member 52 is hollow inside, and a spiral groove 53 is opened in the inner wall of the cylindrical driven member 52. A driven slider 54 is fixedly connected to the side wall of the cylindrical moving rod 45. A connecting rod 55 is centrally symmetrically connected to the outer wall of the bottom end of the cylindrical driven member 52 with reference to the center of the cylindrical driven member 52. A swing scraper 56 is fixedly connected to the end of the connecting rod 55 away from the cylindrical driven member 52. A limit rod 57 is fixedly connected to the inner wall of the annular baffle 2801. A connecting rod 58 is symmetrically fixedly connected to the top surface of the limit rod 57.

[0067] Both the gas overflow component 44 and the driven plate 51 have through holes, and the through holes on the gas overflow component 44 and the driven plate 51 are staggered. The cylindrical moving rod 45 is slidably connected to the inside of the cylindrical driven component 52, the driven slider 54 is slidably connected to the inside of the spiral groove 53, the bottom end of the cylindrical driven component 52 is rotatably connected to the middle of the limiting rod 57, and the top end of the connecting rod 58 is rotatably connected to the swing scraper 56. The swing scraper 56 is centrally symmetrical with reference to the center of the cylindrical driven component 52. The connection point of the connecting rod 55 and the swing scraper 56 is close to the connection point of the swing scraper 56 and the connecting rod 58.

[0068] Example 2: A continuous automatic oil-water separator and its usage method, including the following steps:

[0069] Step 1: Connect the inlet pipe 12 to the external wastewater discharge pipe, connect the drain pipe 13 to the external treated wastewater discharge pipe, and connect the aeration pipe 29 to the external aeration device. Introduce gas into the separator shell 11 through the aeration pipe 29.

[0070] Step 2: The wastewater to be treated enters the inlet chamber 21 through the inlet pipe 12, and then enters the outlet chamber 22 through the inlet chamber 21 and the connecting chamber 23. Finally, it enters the treatment chamber 27 through the circulation outlet 26.

[0071] Step 3: The gas introduced into the treatment chamber 27 through the aeration pipe 29 comes into contact with the wastewater inside the treatment chamber 27 to aerate the wastewater and carry the oil in the wastewater to the surface of the wastewater.

[0072] Step 4: The wastewater level rises in the positioning component 2803. The wastewater flows back into the inlet chamber 21 through the annular filter plate 2802 and the circulation inlet 25. It then mixes with the wastewater in the inlet chamber 21 and enters the treatment chamber 27 again through the connecting chamber 23, the discharge chamber 22, and the circulation outlet 26 to complete the circulation.

[0073] Step 5: The wastewater level in the positioning component 2803 rises, the oil baffle 46 rises, the gas overflow component 44 rises, and the swing scraper 56 swings, scraping the oil on the surface of the wastewater through the oil outlet 47 into the oil storage chamber 48, and then discharging it through the oil discharge pipe 49. The oil-water separation treatment of the wastewater is completed.

[0074] Step 6: The wastewater after multiple aeration treatments is discharged from the separator shell 11 through the filter plate 14 and the drainage pipe 13.

[0075] The overall working process and principle of the above embodiments are as follows:

[0076] Connection of oil-water separator:

[0077] The inlet pipe 12 is connected to the external wastewater discharge pipe, and the drain pipe 13 is connected to the external treated wastewater discharge pipe. The wastewater is then treated by oil-water separation through an oil-water separator. Subsequently, the aeration pipe 29 is connected to an external aeration device. Air is introduced into the treatment chamber 27 through the external aeration device and the aeration pipe 29 to perform oil-water separation.

[0078] Specifically, when wastewater enters the separator housing 11 through the inlet pipe 12, the wastewater will enter the inlet chamber 21 connected to the inlet pipe 12. Since the inlet chamber 21 and the outlet chamber 22 are connected through the connecting chamber 23, the wastewater entering the inlet chamber 21 will enter the outlet chamber 22 through the connecting chamber 23. Since the outlet chamber 22 is connected to the treatment chamber 27 through the circulation outlet 26, the wastewater will enter the treatment chamber 27 through the circulation outlet 26.

[0079] In the above process, since the top wall of the inlet chamber 21 is fixedly connected with an annular baffle 24, when the wastewater enters the inlet chamber 21 through the inlet pipe 12, the water flow will contact the outer wall of the annular baffle 24, thus avoiding direct contact between the wastewater and the wall of the inlet chamber 21 and causing impact. In addition, since the inlet pipe 12 is composed of two pipes with different horizontal heights connected to each other, and the vertical height of the pipe at the end of the inlet pipe 12 away from the separator housing 11 is higher than that of the pipe at the end of the inlet pipe 12 close to the separator housing 11, the wastewater can be completely discharged into the interior of the separator housing 11 through the inlet pipe 12.

[0080] Meanwhile, staff introduce gas into the treatment chamber 27 through an external aeration device and aeration pipe 29. As the volume of wastewater in the treatment chamber 27 gradually increases, the wastewater level will gradually rise inside the treatment chamber 27 and the positioning component 2803. As the aeration device performs oil-water separation treatment on the wastewater, the wastewater level inside the positioning component 2803 will gradually rise and eventually reach the annular filter plate 2802. Since the inlet chamber 21 is connected to the treatment chamber 27 through the circulation inlet 25, and the annular filter plate 2802 is located at the connection between the treatment chamber 27 and the circulation inlet 25, when the wastewater level gradually overflows the annular filter plate 2802, some wastewater will re-enter the inlet chamber 21 through the annular filter plate 2802 and the circulation inlet 25.

[0081] In the above process, the circular baffle 2801, the annular filter element and the positioning element 2803 are set to separate the wastewater that has been aerated from the wastewater that has not been aerated. At the same time, when the liquid level of the wastewater after the initial aeration treatment rises to the annular filter plate 2802, some of the wastewater will re-enter the inlet chamber 21 through the annular filter plate 2802 and the circulation inlet 25. Due to the setting of the annular baffle 24, the wastewater that re-enters the inlet chamber 21 will be blocked by the inner ring surface of the annular baffle 24, which reduces the direct collision between the wastewater after the initial aeration treatment and the wastewater that enters the inlet chamber 21 through the inlet pipe 12. Subsequently, the wastewater after the initial treatment will continue to re-enter the treatment chamber 27 through the connecting chamber 23, the discharge chamber 22 and the circulation outlet 26 for aeration treatment again.

[0082] Meanwhile, since the discharge chamber 22 is also connected to the drainage pipe 13, some wastewater will be discharged through the drainage pipe 13. Since the drainage pipe 13 is composed of two pipes with different horizontal heights connected to each other, and the vertical height of the pipe at the end of the drainage pipe 13 away from the separator housing 11 is higher than that of the pipe at the end of the drainage pipe 13 near the separator housing 11, as well as the filter disc 14 installed in the two pipes, and the height of the end of the drainage pipe 13 away from the separator housing 11 is higher than the height of the circulation outlet 26, when the wastewater first enters the treatment chamber 27 through the discharge chamber 22 and the circulation outlet 26, the wastewater will be blocked by the drainage pipe 13 and the filter disc 14 and cannot be discharged through the drainage pipe 13.

[0083] It should be noted that, due to the installation of the filter plate 14 inside the drainage pipe 13, even if the inner diameters of the inlet pipe 12 and the drainage pipe 13 are the same, the filter plate 14 obstructs the wastewater flow channel inside the drainage pipe 13, thereby affecting the actual flow rate of the drainage pipe 13, making the flow velocity of the wastewater in the drainage pipe 13 less than that in the inlet pipe 12.

[0084] Therefore, as wastewater is continuously fed into the separator housing through the inlet pipe 12, the wastewater level inside the treatment chamber 27 will gradually rise, thereby completing the circulation and aeration of the wastewater inside the separator housing 11 through the annular filter plate 2802 and the circulation inlet 25. A large number of bubbles are formed in the wastewater in the treatment chamber 27 through the aeration device, which carries the oil contained in the wastewater to the liquid surface, thereby completing the further oil-water separation treatment of the wastewater.

[0085] Furthermore, during the process of oil-water separation treatment of wastewater in treatment chamber 27 through external aeration device and aeration pipe 29, due to the setting of annular baffle 2801, annular filter plate 2802 and positioning member 2803 in treatment chamber 27, the interior of treatment chamber 27 is divided into two parts: one part is wastewater that enters treatment chamber 27 directly from outside positioning member 2803 through circulating drain port, and the other part is wastewater located inside positioning member 2803 that comes into direct contact with gas discharged through aeration pipe 29;

[0086] For the wastewater located inside the positioning component 2803, the gas in the aeration pipe 29 will directly contact this part of the wastewater to perform oil-water separation treatment. Since the cross-section of the positioning component 2803 is composed of two rectangles of different sizes and an isosceles trapezoid set between the two rectangles, and the size of the upper rectangle in the vertical direction is larger than that of the lower rectangle, the wastewater flow channel inside the positioning component 2803 gradually increases. When the wastewater flows from the lower small rectangular channel into the upper large rectangular channel, the flow velocity gradually decreases. The low-speed flow can reduce the shear force on the aeration bubbles, avoid the bubbles from breaking or dispersing, maintain the stable adsorption of bubbles and oil droplets, and the isosceles trapezoidal area forms a "contraction-expansion" structure, generating a slight eddy, promoting gas-liquid mixing, increasing the contact probability of oil droplets and bubbles, and the low flow velocity in the upper large rectangular channel makes it easy for the oil layer to accumulate on the liquid surface.

[0087] The difference between the above-mentioned technical means and the existing technology is that, in the process of separating oil and water in wastewater, the annular filter plate 2802 prevents the separated oil from re-entering the wastewater recycling process through the circulation inlet 25, and in the process of aerating wastewater inside the positioning component 2803 with the aeration pipe 29, the bubbles generated during the aeration process are prevented from carrying oil through the circulation inlet 25.

[0088] Furthermore, when the treated wastewater re-enters the recycling process, it will be blocked by the annular baffle 24 set in the water inlet 21 when it is re-circulated through the recycling inlet 25. This prevents the wastewater from being re-circulated from colliding with the wastewater that initially enters the water inlet 21, thus affecting the oil-water separation process when the wastewater enters the water inlet 21 through the water inlet pipe 12.

[0089] Meanwhile, the hexagonal frame-type limiting component 2804 located inside the positioning component 2803 and the baffle fan 2805 located inside the limiting component 2804 make the contact between the bubbles and the oil in the wastewater more sufficient. Specifically, the smooth sidewalls and symmetry of the hexagonal frame can reduce the separation of the fluid boundary layer and reduce the turbulence intensity, allowing the wastewater to pass through in a laminar or low-turbulence state, which is conducive to the stable adsorption of bubbles and oil droplets inside the positioning component 2803. At the same time, as the bubbles in the wastewater continue to rise and the liquid flows, the blades of the baffle fan 2805 will rotate inside the positioning component 2803 under the action of bubbles and liquid. The baffle fan 2805 generates micro eddies during the flow of wastewater, which promotes the uniform mixing of bubbles, oil droplets and solid particles. The eddies can break the stagnant layer around the oil droplets, accelerate the collision efficiency of bubbles and oil droplets, and improve the oil removal rate.

[0090] The arrangement of the inlet chamber 21, outlet chamber 22, connecting chamber 23, circulating inlet 25, circulating outlet 26, and treatment chamber 27 allows the wastewater to circulate within the oil-water separator, continuously contacting the gas in the aeration device. This carries the oil in the wastewater to the top of the liquid surface via air bubbles, completing the continuous oil-water separation process. The circulating flow ensures thorough mixing of the wastewater and air bubbles, avoiding dead zones or short-circuiting, and maximizing the probability of oil droplets being captured by the air bubbles. Simultaneously, the arrangement of the annular baffle 2801, annular filter plate 2802, and positioning element 2803 prevents direct contact between air bubbles and the circulating inlet 25 and circulating outlet 26 during the wastewater aeration process, thus preventing air bubbles from carrying oil back into the wastewater recycling process.

[0091] As the wastewater aeration process proceeds and the wastewater level inside the positioning component 2803 gradually rises, since both the gas overflow component 44 and the driven plate 51 have through holes, and the through holes on the gas overflow component 44 and the driven plate 51 are staggered, in the initial state, the oil-laden bubbles after aeration carry the oil to the liquid surface and burst, and the gas accumulates between the wastewater surface and the gas overflow component 44. As the liquid level rises and the gas accumulates, the bottom of the wastewater surface will contact the bottom of the oil baffle 46, and as the liquid level gradually rises, it will exert an upward pushing force on the oil baffle 46. At the same time, the gradual increase in gas pressure will also exert an upward force on the gas overflow component 44.

[0092] Then, the oil baffle 46 and the gas overflow component 44 move vertically upward in the vertical slot 41 and the positioning slide 42. When the gas overflow component 44 moves, it will stretch the telescopic spring 43 set in the positioning slide 42. The cylindrical moving rod 45 fixedly connected to the bottom of the gas overflow component 44 will move upward synchronously. The cylindrical moving rod 45 will drive the driven slider 54 fixedly connected to its outer surface to move upward. Since the driven slider 54 is slidably connected in the spiral groove 53 opened in the inner wall of the cylindrical driven component 52, the sliding of the driven slider 54 will contact the inclined groove wall of the spiral groove 53, forcing the spiral groove 53 to move, thereby causing the cylindrical driven component 52 to rotate inside the limiting rod 57.

[0093] The rotation of the cylindrical follower 52 drives the connecting rod 55, which is rotatably connected to its side, to move synchronously. This, in turn, causes the swing scraper 56 to swing around its connection point with the connecting rod 58. Simultaneously, as the driven plate 51 rotates under the influence of the cylindrical follower 52, the gas overflow parts 44 and the through holes on the driven plate 51, which were originally staggered, gradually overlap. As the gas overflow parts 44 rise, the gas that was originally accumulated at the top of the wastewater surface gradually dissipates. At this time, the gas pressure between the liquid surface and the driven plate 51 gradually decreases. In the positioning part 2803, the gas pressure at the top of the liquid surface is P. gas It provides support for the liquid level height h. According to the principles of fluid statics: P gas =P0 + ρgh, where P0 is atmospheric pressure, ρ is liquid density, g is gravitational acceleration, and h is liquid level. Therefore, when the gas escapes, the gas pressure P... gas Decreasing the liquid level will cause the liquid height h to drop in order to rebalance the pressure relationship;

[0094] Therefore, the upward pushing force of the liquid surface on the oil baffle 46 decreases, the upward pushing force on the gas overflow component 44 decreases, and then under the action of the elastic force of the extension spring 43, it tends to rebound downward, thereby causing the above structure to move in the opposite direction according to the above steps. It should be noted that since the aeration device is constantly running inside the wastewater and the gas escape speed is constantly changing with the rising speed of the bubbles, the air pressure below the gas overflow component 44 is also constantly changing, thus causing the gas overflow component 44 to be in a state of continuous rising or falling.

[0095] When the gas overflow component 44 rises, the part of the gas overflow component 44 that is slidably connected to the vertical slot 41 will rise accordingly. At this time, the oil outlet 47 that was originally blocked by the gas overflow component 44 will leak out. Since the oil storage chamber 48 is connected to the inside of the annular baffle 2801 through the oil outlet 47, as the swing scraper 56 moves, the swing scraper 56 will scrape the oil at the top of the liquid surface from the middle of the liquid surface to both sides of the liquid surface, and scrape the oil through the oil outlet 47 into the oil storage chamber 48, thereby scraping off the oil at the top of the wastewater liquid surface, thus completing the oil-water separation treatment of the wastewater.

[0096] The difference between the above-mentioned technical means and the existing technology is that, while the wastewater is being treated by circulating aeration, the oil carried to the surface of the liquid by the air bubbles after the wastewater treatment is scraped off. The coordinated operation of circulating aeration and mechanical scraping continues after the wastewater enters the oil-water separator. While not affecting the oil-water separation operation, the oil accumulated on the surface of the wastewater is collected and cleaned, avoiding the situation where too much oil accumulates on the surface of the wastewater, thereby affecting the wastewater circulation in the oil-water separator.

[0097] It should be noted that, in the above process, since the cross-section of the oil storage chamber 48 is composed of a rectangle at the top and a trapezoid at the bottom, and the channel of the trapezoidal part of the oil storage chamber 48 is connected to the oil discharge pipe 49 through one end of the separator shell 11, the oil entering the oil storage chamber 48 will eventually flow into the trapezoidal part. This avoids the phenomenon of oil flowing back from the oil storage chamber 48 and the oil outlet 47 due to the movement of the liquid surface and the scraping operation of the swing scraper 56. Finally, the oil is discharged through the oil discharge pipe 49, thus completely completing the oil-water separation treatment of the wastewater.

[0098] By using the swing scraper 56, the oil on top of the liquid surface can be scraped off in conjunction with the swing operation. With the oil outlet 47 and the oil storage chamber 48, the oil is prevented from flowing back to the top of the wastewater after being scraped off. By actively scraping instead of passively separating, the swing scraper 56 actively pushes the oil layer with mechanical force, which can shorten the oil layer removal time. The smooth pushing action of the swing scraper 56 can reduce the shear force on the oil layer and prevent the oil droplets from breaking into smaller particles and redispersing. In addition, the oil storage chamber 48 is isolated from the wastewater area to prevent the oil from flowing back to the top of the wastewater due to water flow disturbance or temperature changes.

[0099] After the oil-water separator has finished treating the wastewater, the operator can press the pressing blocks 32 located on both sides of the annular baffle 2801. When the pressing blocks 32 are under pressure, they compress the compression spring 33 located between the pressing blocks 32 and the annular baffle 2801. At this time, the pressing blocks 32 are disengaged from the positioning groove 31, and the operator can remove the annular baffle 2801, the annular filter plate 2802, and the positioning element 2803 from the separator housing 11, thus completing the separation of the annular baffle 2801, the annular filter plate 2802, and the positioning element 2803 from the separator housing 11.

[0100] The positioning groove 31, pressing block 32, and compression spring 33 enable the annular baffle 2801, annular filter plate 2802, and positioning element 2803 to be separable from the separator housing 11, allowing for separate cleaning of the two parts. This prevents oil from accumulating inside the oil-water separator. The separable design allows for direct cleaning or replacement of contaminated parts, reducing oil residue. Furthermore, the detachable arrangement of the annular baffle 2801, annular filter plate 2802, and positioning element 2803 allows for easy removal and cleaning of these parts. In the event of a part failure, it is also replaceable, extending the service life of the oil-water separator.

[0101] Finally, the wastewater, after being recycled and treated by oil-water separation, will be discharged from the separator housing 11 through the drain pipe 13.

[0102] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0103] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous oil-water automatic separator, comprising a separator housing (11), an inlet pipe (12) fixedly connected to the top of one side of the separator housing (11), a drain pipe (13) fixedly installed at the bottom of the other side of the separator housing (11), and a filter disc (14) fixedly installed inside the drain pipe (13), characterized in that: It also includes a wastewater circulation assembly disposed inside the separator housing (11); The wastewater circulation assembly includes an inlet chamber (21) inside the separator housing (11), a discharge chamber (22) at the bottom of the separator housing (11), the inlet chamber (21) being located above the discharge chamber (22), a connecting chamber (23) inside the separator housing (11), an annular baffle (24) fixedly connected to the top wall of the inlet chamber (21), a circulation inlet (25) on the side wall of the inlet chamber (21), a circulation outlet (26) on the side wall of the discharge chamber (22), and a treatment chamber vertically located at the center of the separator housing (11). The cavity (27) has a circular baffle (2801) slidably connected to the side wall of the cavity (27). The bottom end of the circular baffle (2801) is detachably fixedly installed with an annular filter plate (2802). The bottom surface of the annular filter plate (2802) is detachably fixedly installed with a positioning component (2803). The positioning component (2803) is vertically set with symmetrical fixed connections of limit components (2804). The center of the two limit components (2804) is rotatably connected with a turbulence fan (2805). The bottom center of the separator shell (11) is fixedly connected with an aeration pipe (29). The annular baffle (2801), the annular filter plate (2802), and the positioning component (2803) are all located inside the treatment chamber (27). The annular filter plate (2802) has a rubber gasket on its outer ring. The size of the annular filter plate (2802) is adapted to the circulating liquid inlet (25). The positioning component (2803) is hollow inside. The cross-section of the positioning component (2803) consists of two rectangles of different sizes and an isosceles trapezoid located between the two rectangles. The size of the rectangle located above the positioning component is larger than that of the rectangle located below the positioning component. The limiting component (2804) is set as a hexagonal frame structure. The aeration pipe (29) passes through the separator shell (11) and is connected to the treatment chamber (27). It also includes a snap-fit ​​assembly disposed inside the separator housing (11); The snap-fit ​​assembly includes positioning grooves (31) symmetrically opened on the top cavity wall of the processing cavity (27). Each positioning groove (31) is snapped with a pressing block (32). Each pressing block (32) is fixedly connected with a compression spring (33) at one end close to the other. The pressing blocks (32) are symmetrically arranged with reference to the vertical central axis of the circular baffle (2801), and the pressing blocks (32) are fixedly connected to the outer surface of the top of the circular baffle (2801) at their respective ends. The compression springs (33) are fixedly connected to the outer surface of the circular baffle (2801) at their ends away from the pressing blocks (32).

2. The continuous automatic oil-water separator according to claim 1, characterized in that: The inlet pipe (12) is composed of two pipes with different horizontal heights connected to each other. The vertical height of the pipe at the end of the inlet pipe (12) away from the separator shell (11) is higher than that of the pipe at the end of the inlet pipe (12) close to the separator shell (11). The drain pipe (13) is composed of two pipes with different horizontal heights connected to each other. The vertical height of the pipe at the end of the drain pipe (13) away from the separator shell (11) is higher than that of the pipe at the end of the drain pipe (13) close to the separator shell (11). There are two filter discs (14), which are located in the two pipes of the drain pipe (13). The inlet chamber (21) and the outlet chamber (22) are connected through the connecting chamber (23). The inlet chamber (21) is connected to the treatment chamber (27) through the circulation inlet port (25). The outlet chamber (22) is connected to the treatment chamber (27) through the circulation outlet port (26). The inlet pipe (12) is connected to the inlet chamber (21). The drain pipe (13) is connected to the outlet chamber (22).

3. The continuous automatic oil-water separator according to claim 1, characterized in that: The inlet chamber (21) and the outlet chamber (22) are both provided with spiral channels on their side walls. The cross-section of the connecting chamber (23) is composed of two symmetrically arranged isosceles trapezoids and a rectangle between the two isosceles trapezoids. The size of the two isosceles trapezoids at the ends away from each other is greater than the size of the ends close to each other. The inlet chamber (21), the outlet chamber (22) and the connecting chamber (23) are all arranged around the outside of the treatment chamber (27).

4. A continuous automatic oil-water separator according to claim 1, characterized in that: It also includes a discharge assembly disposed inside the annular baffle (2801); The discharge assembly includes vertical slots (41) symmetrically opened on the inner wall of the annular baffle (2801), and positioning grooves (42) symmetrically opened on the inner wall of the annular baffle (2801). The bottom wall of the positioning grooves (42) is fixedly connected with a telescopic spring (43). The vertical slots (41) and positioning grooves (42) are staggered inside the annular baffle (2801). The interior of the vertical slots (41) and positioning grooves (42) are slidably connected to a gas overflow component (44). A cylindrical moving rod (45) is fixedly connected to the bottom end of the center of the gas overflow component (44). An oil baffle (46) is fixedly connected to the inner wall of the bottom end of the gas overflow component (44). An oil outlet (47) is opened through both ends of the annular baffle (2801). An oil storage chamber (48) is symmetrically opened inside the separator housing (11). An oil discharge pipe (49) is fixedly connected to the outer wall of both ends of the separator housing (11).

5. A continuous automatic oil-water separator according to claim 4, characterized in that: Two oil outlets (47) are connected to vertical slots (41) respectively. The oil outlets (47) are connected to the oil storage chamber (48). The cross-section of the oil storage chamber (48) is a combination of a rectangle at the top and a trapezoid at the bottom. The trapezoidal part of the oil storage chamber (48) is connected to the oil discharge pipe (49) through one end of the separator shell (11).

6. A continuous automatic oil-water separator according to claim 4, characterized in that: It also includes a separation component disposed inside the annular baffle (2801); The separation assembly includes a driven plate (51) fitted below the gas overflow component (44), a cylindrical driven member (52) fixedly connected to the center of the bottom end of the driven plate (51), the cylindrical driven member (52) is hollow inside, a spiral groove (53) is opened in the inner wall of the cylindrical driven member (52), a driven slider (54) is fixedly connected to the side wall of the cylindrical moving rod (45), a connecting rod (55) is centrally symmetrically connected to the outer wall of the bottom end of the cylindrical driven member (52) with reference to the center of the cylindrical driven member (52), a swing scraper (56) is fixedly connected to the end of the connecting rod (55) away from the cylindrical driven member (52), a limit rod (57) is fixedly connected to the inner wall of the circular baffle (2801), and a connecting rod (58) is symmetrically fixedly connected to the top surface of the limit rod (57).

7. A continuous automatic oil-water separator according to claim 6, characterized in that: Both the gas overflow component (44) and the driven plate (51) have through holes, and the through holes on the gas overflow component (44) and the driven plate (51) are staggered. The cylindrical moving rod (45) is slidably connected to the inside of the cylindrical driven component (52), the driven slider (54) is slidably connected to the inside of the spiral groove (53), the bottom end of the cylindrical driven component (52) is rotatably connected to the middle of the limiting rod (57), and the top end of the connecting rod (58) is rotatably connected to the swing scraper (56). The swing scraper (56) is centrally symmetrical about the center of the cylindrical driven component (52). The connection point of the connecting rod (55) and the swing scraper (56) is close to the connection point of the swing scraper (56) and the connecting rod (58).

8. A method for using a continuous automatic oil-water separator, applied to a continuous automatic oil-water separator as described in claims 1-7, characterized in that, Includes the following steps: Step 1: Connect the inlet pipe (12) to the external wastewater discharge pipe, connect the drain pipe (13) to the external treated wastewater discharge pipe, and connect the aeration pipe (29) to the external aeration device. Introduce gas into the separator shell (11) through the aeration pipe (29). Step 2: The wastewater to be treated enters the inlet chamber (21) through the inlet pipe (12), and then enters the outlet chamber (22) through the inlet chamber (21) and the connecting chamber (23), and then enters the treatment chamber (27) through the circulation outlet (26); Step 3: Gas introduced into the treatment chamber (27) through the aeration pipe (29) comes into contact with the wastewater inside the treatment chamber (27) to aerate the wastewater and carry the oil in the wastewater to the surface of the wastewater. Step 4: The wastewater level rises in the positioning component (2803), and the wastewater flows back into the inlet chamber (21) through the annular filter plate (2802) and the circulation inlet (25). It then mixes with the wastewater in the inlet chamber (21) and enters the treatment chamber (27) again through the connecting chamber (23), the discharge chamber (22), and the circulation outlet (26) to complete the circulation. Step 5: The wastewater level in the positioning component (2803) rises, the oil baffle (46) rises, the gas overflow component (44) rises, and the swing scraper (56) swings, scraping the oil on the surface of the wastewater through the oil outlet (47) into the oil storage chamber (48), and then discharging it through the oil discharge pipe (49). The oil-water separation treatment of the wastewater is completed. Step 6: The wastewater after multiple aeration treatments is discharged from the separator shell (11) through the filter disc (14) and the drainage pipe (13).

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