An oil-water separation device

Abstract

The utility model relates to the technical field of kitchen oil recovery, particularly relates to an oil-water separation device, the device is reasonably separated into four regions of liquid inlet chamber, buffer chamber, oil discharge chamber and water discharge chamber through first partition, second partition and third partition, is provided with the flow guide pipe, overflow, third partition bottom gap setting makes each chamber intercommunication, is equipped with the oil-water detection module including the oil-water detection module signal output end and the signal input end of the collection control module electric connection to generate control signal according to electrode conduction state, the electric valve signal input end and the signal output end of collection control module are connected to receive control signal and execute the opening and closing action of oil discharge pipe, the device can realize efficient oil-water separation and intelligent control.

Description

Technical Field

[0001] This utility model relates to the field of kitchen oil recycling technology, and in particular to an oil-water separation device. Background Technology

[0002] In the current field of oil pollution treatment in the catering and related industries, there are many technical problems and practical difficulties that urgently need to be solved.

[0003] Traditional grease traps can only partially isolate grease in oil pollution treatment and do not have solid-liquid separation function. Oil and sludge easily accumulate and clog the grease trap, resulting in an oil-water separation rate of less than 50% and difficulty in meeting drainage standards. Waste oil and sludge rely on manual retrieval, which is difficult to clean and has high maintenance costs. At the same time, it is impossible to realize the secondary use of resources, resulting in great waste and easy to cause secondary pollution, affecting environmental sanitation.

[0004] In summary, existing technologies for oil pollution recovery and treatment suffer from numerous shortcomings, including low recovery rates, poor separation efficiency, significant resource waste, and high maintenance costs. Those skilled in the art urgently need a reliable device to improve oil pollution treatment efficiency, achieve effective resource utilization, and reduce environmental pollution and treatment costs. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides an oil-water separation device, comprising: a device body, which contains a first partition plate, a second partition plate, and a third partition plate. The first partition plate divides the device body into a first space and a second space. An overflow port is provided above the first partition plate so that the first space and the second space are connected. The first space is provided with a second partition plate, which divides the first space into a liquid inlet chamber and a buffer chamber. The liquid inlet chamber is provided with a liquid inlet, and the second partition plate is provided with an opening, so that the water in the liquid inlet chamber flows into the buffer chamber through the opening. The third partition plate divides the second space into an oil draining chamber and a drainage chamber. An oil draining pipe is provided above the oil draining chamber, and a drainage pipe is provided above the drainage chamber. The third partition plate is connected to the side wall of the first partition plate and the side wall of the second space, respectively. A gap is provided between its bottom and the bottom of the second space so that the oil draining chamber and the drainage chamber are connected. An oil-water detection module is located above the oil drain chamber and includes at least one electrode that contacts the liquid medium. The centralized control module has its signal input terminal electrically connected to the signal output terminal of the oil-water detection module, and can generate control signals according to the conduction state of the electrodes; An electric valve, located on the drain pipe, has its signal input terminal connected to the signal output terminal of the central control module. It is used to receive control signals and execute the opening and closing actions of the drain pipe.

[0006] Based on the above scheme, it further includes a third space, wherein one end of the oil drain pipe is located in the oil drain chamber and the other end is located in the third space; An oil storage container is located below the oil drain pipe in the third space, and a weight detector is located below the oil storage container.

[0007] Based on the above solution, the weight detector is further equipped with an alarm device, which is electrically connected to the central control module; when the weight of the oil detected by the weight detector exceeds a preset threshold, the central control module triggers the alarm device to issue an alarm signal.

[0008] Based on the above scheme, the first electrode and the second electrode are further fixedly installed on the electrode mounting plate above the oil drain chamber; both the first electrode and the second electrode are in direct contact with the liquid, or the first electrode is in contact with the liquid, and the second electrode is indirectly connected to the liquid through grounding.

[0009] Based on the above solution, it further includes a vibration cleaning module installed inside the electrode, which is electrically connected to the central control module.

[0010] Based on the above scheme, a detachable filter screen is further provided above the liquid inlet chamber.

[0011] Based on the above scheme, a heating rod is further provided above the oil drain chamber, and the heating rod is electrically connected to the central control module.

[0012] Based on the above scheme, the second partition plate is further connected to the side wall of the first partition plate and the side wall of the first space respectively; an opening is provided above the second partition plate, and a guide pipe is provided at the opening; the guide pipe is attached to the second partition plate and is perpendicular to the first partition plate in the horizontal space, so that the water flows out of the guide pipe through the opening and flows along the side wall of the second partition plate and the side wall of the first partition plate to the overflow port in sequence; Alternatively, the second partition plate is connected to the two side walls of the first space and is parallel to the first partition plate. An opening is provided above the second partition plate, and the opening is located at the end away from the overflow port, so that the water flows in from the inlet, flows out through the opening, and flows sequentially along the side wall of the first space and the side wall of the first partition plate to the overflow port.

[0013] Based on the above scheme, further, one end of the drain pipe is located in the drain chamber, and the other end is located in the third space and passes through the third space to communicate with the outside. An inclined plate is provided below one end of the drain pipe in the drain chamber.

[0014] Based on the above scheme, it further includes a backflow valve respectively installed below the first partition plate and the second partition plate, and a clean water pipe installed below the liquid inlet chamber, wherein the clean water pipe is connected to the outside. When the backflow valve is opened, water flows sequentially from the second space through the buffer chamber to the liquid inlet chamber and is discharged through the clean water pipe.

[0015] Compared with existing technologies, the oil-water separation device provided by this utility model rationally divides the device body into multiple spaces, such as an inlet chamber, a buffer chamber, an oil discharge chamber, and a drain chamber, through a first partition plate, a second partition plate, and a third partition plate. The inlet chamber is connected to the buffer chamber via a guide pipe, and the space is connected by an overflow port above the first partition plate, allowing for a stable water flow transition. The gap between the bottom of the third partition plate and the bottom of the second space ensures that the oil discharge chamber and the drain chamber are connected. Combined with the oil-water detection module located above the oil discharge chamber, the oil-water status is monitored in real time. The control module generates control signals to precisely control the electric valve to execute the opening and closing action of the oil discharge pipe. This can effectively realize intelligent control of the oil-water separation process, avoid oil carryover during drainage, and improve the efficiency and accuracy of oil-water separation. At the same time, the structural design of the connection between each partition plate ensures smooth flow, reduces the risk of blockage, facilitates maintenance, and improves the overall practicality and reliability of the device.

[0016] This oil-water separator uses physical oil-water separation technology, requiring no power source or chemical additives, making it environmentally friendly and energy-saving. Its automated design makes it easy, safe, and efficient to operate, and it replaces traditional grease traps. It is convenient to install, reduces floor space, is easy to clean, and is reusable. Its effectiveness is significant, intercepting more than 95% of grease and solid residue in kitchen waste, greatly reducing wastewater treatment costs, effectively preventing sewer blockages and sewage backflow, and reducing the pollution of the environment by waste oil. The separated grease has a purity of over 95% and can be recycled to produce biodiesel, achieving resource regeneration. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the oil-water separation device provided by this utility model; Figure 2 A three-dimensional schematic diagram of the internal structure of the oil-water separation device in Embodiment 1 provided by this utility model; Figure 3 This is a front view of the internal structure of the oil-water separation device provided by this utility model; Figure 4 Right view of the internal structure of the oil-water separation device of Embodiment 1 provided by this utility model; Figure 5 A three-dimensional schematic diagram of the internal structure of the oil-water separation device according to Embodiment 2 of the present invention.

[0019] Figure label: 10 - Device body; 11 - First partition plate; 12 - Second partition plate; 13 - Third partition plate; 20 - Liquid inlet chamber; 21 - Liquid inlet; 22 - Filter screen; 23 - Opening; 30-Buffer chamber; 31-Overflow outlet; 32-Guide pipe; 33-Backflow valve; 34-Flow buffer plate; 40 - Oil drain chamber; 41 - Oil drain pipe; 42 - Electric valve; 43 - Heating rod; 50 - Drainage chamber; 51 - Drainage pipe; 52 - Inclined plate; 60 - Oil and water detection module; 61 - First electrode; 62 - Second electrode; 63 - Electrode mounting plate; 70 - Centralized control module; 80-Oil storage container; 81-Weight gauge; 82-Water purification pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] To address the numerous shortcomings of existing technologies in oil pollution recovery and treatment, such as low recovery rate, poor separation efficiency, significant resource waste, and high maintenance costs, this utility model provides a solution... Figure 1-4Example 1 and Figure 1 , 3 The water-oil separation device of Example 2 of 5.

[0023] like Figure 1-5 As shown, the oil-water separation device includes: a device body 10, which contains a first partition plate 11, a second partition plate 12, and a third partition plate 13. The first partition plate 11 divides the device body 10 into a first space and a second space. An overflow port 31 is provided above the first partition plate 11 so that the first space and the second space are connected. A second partition plate 12 is provided in the first space to divide the first space into a liquid inlet chamber 20 and a buffer chamber 30. The liquid inlet chamber 20 is provided with a liquid inlet 21. An opening 23 is provided above the second partition plate 12 so that the water flow from the liquid inlet chamber 20 flows into the buffer chamber 30 through the opening 23 in sequence. The third partition plate 13 divides the second space into an oil draining chamber 40 and a drainage chamber 50. An oil draining pipe 41 is provided above the oil draining chamber 40, and a drainage pipe 51 is provided above the drainage chamber 50. The third partition plate 13 is connected to the side wall of the first partition plate 11 and the side wall of the second space respectively. Its bottom is separated from the bottom of the second space, so that the oil draining chamber 40 and the drainage chamber 50 are connected. The oil-water detection module 60 is located above the oil drain chamber 40 and includes at least one electrode that contacts the liquid medium. The centralized control module 70 has its signal input terminal electrically connected to the signal output terminal of the oil-water detection module 60, and can generate control signals according to the conduction state of the electrodes; An electric valve 42 is installed on the oil drain pipe 41. Its signal input terminal is connected to the signal output terminal of the central control module 70, and it is used to receive control signals to execute the opening and closing action of the oil drain pipe 41.

[0024] Specifically, during use, the oil-water mixture first enters the inlet chamber 20 in the first space through the inlet 21, and then slowly flows into the buffer chamber 30 through the opening 23 above the second partition plate 12 and the guide pipe 32. The guide pipe 32 can slow down the flow rate and promote the initial stratification of the oil-water mixture. The oil phase, due to its lower density, gradually floats to the top of the buffer chamber 30, while the water phase sinks to the bottom. The oil layer in the buffer chamber 30 enters the oil drain chamber 40 through the overflow port 31 above the first partition plate 11, while the water layer flows into the drain chamber 50 through the gap at the bottom of the third partition plate 13. In the oil-water detection module 60 set above the oil drain chamber 40, the first electrode 61 and the second electrode 62 contact the oil layer or the water layer. Due to the difference in conductivity between the electrodes, oil is a non-conductor and water is a conductor, which causes a change in the conduction state and triggers the control module 70 to generate a control signal. When the first electrode 61 and the second electrode 62 simultaneously contact the oil layer, or one electrode contacts the oil layer while the other electrode is grounded, the first electrode 61 and the second electrode 62 are not conductive at this time, and a signal is sent to the central control module 70. After processing, the central control module 70 outputs an electrical signal to control the electric valve 42 to open and open the oil drain pipe 41 to drain the oil. If the water level in the oil drain chamber 40 is high, when the first electrode 61 and the second electrode 62 simultaneously contact the water layer, or one electrode contacts the water layer while the other electrode is grounded, the first electrode 61 and the second electrode 62 are conductive, and a signal is sent to the central control module 70. After processing, the central control module 70 outputs an electrical signal to control the electric valve 42 to close and the oil drain pipe 41 to close, completing one oil drain cycle. When the water layer enters the drain chamber 50 through the bottom gap and is gradually discharged through the drain pipe 51, the electrode contacts the oil layer again, and the above operation is repeated.

[0025] Preferably, the liquid inlet 21 can be connected to multiple integrated stoves, so that one oil-water separation device can centrally treat the oily wastewater generated by multiple stoves. This is especially suitable for large catering establishments, avoiding the need to configure equipment separately for each stove, effectively reducing purchase costs and installation space requirements. Integrating multiple stoves into one oil-water separation device can also effectively improve the cleanliness of the kitchen environment and increase space utilization.

[0026] It should be noted that the bottom of the third partition plate 13 is separated from the bottom of the second space to allow the oil draining chamber 40 and the drainage chamber 50 to communicate. The height of the gap can be adjusted according to actual needs. When the device integrates multiple stoves, the gap height can be increased to facilitate rapid drainage and oil removal.

[0027] It should be noted that the centralized control module 70 is electrically connected to the signal output terminal of the oil-water detection module 60 through the signal input terminal. It can generate control signals according to the conduction state between the first electrode 61 and the second electrode 62. This centralized control module is used for simple signal transmission and belongs to the prior art, so it will not be described in detail here.

[0028] In one embodiment, such as Figure 2 and Figure 3 As shown, it also includes a third space, with one end of the oil drain pipe 41 located inside the oil drain chamber 40 and the other end located inside the third space; An oil storage container 80 is provided below the oil drain pipe 41 located in the third space, and a weight detector 81 is provided below the oil storage container 80.

[0029] Using the above scheme, the weight of the discharged oil is monitored in real time by the weight detector 81, and the amount of oil discharged is quantified, which is convenient for calculating the amount of oil recovered or optimizing the separation efficiency; the independently set oil storage container 80 is convenient for centralized collection and maintenance.

[0030] In one embodiment, the weight detector 81 is equipped with an alarm device, which is electrically connected to the central control module 70; when the weight of the oil detected by the weight detector 81 exceeds a preset threshold, the central control module 70 triggers the alarm device to issue an alarm signal.

[0031] Using the above scheme, when the weight of the oil in the oil storage container 80 exceeds the preset threshold, the weight detector 81 sends a signal to the central control module 70; the central control module 70 can trigger audible and visual alarm devices such as buzzers and indicator lights to remind the user to handle the situation in a timely manner.

[0032] In Example 1, as Figure 4 As shown, the electrode is fixedly installed on the electrode mounting plate above the oil drain chamber, and a vibration cleaning module is provided inside it. The vibration cleaning module is electrically connected to the central control module 70. The electrode includes a first electrode 61 and a second electrode 62, both of which are in direct contact with the liquid to form a conductive circuit. Alternatively, the electrode may be a single electrode that is indirectly connected to the liquid via grounding.

[0033] In one embodiment, a vibration cleaning module installed inside the electrode is also included, the vibration cleaning module being electrically connected to the central control module 70.

[0034] Specifically, during use, when the electrode comes into contact with the oil layer, the vibration cleaning module starts to vibrate to prevent the oil layer from adhering to the electrode and affecting the detection accuracy; when the electrode comes into contact with the water layer, the vibration cleaning module stops vibrating.

[0035] In one embodiment, such as Figure 2 As shown, a detachable filter screen 22 is provided above the liquid inlet chamber 20.

[0036] Using the above solution, when the oil-water mixture enters the inlet chamber 20, the removable filter screen 22 intercepts solid impurities such as food residue, preventing impurities from entering the recovered oil and water; users can also periodically disassemble the filter screen 22 for cleaning or replacement.

[0037] Preferably, the liquid inlet 21 is located above the filter screen 22.

[0038] In one embodiment, such as Figure 2 As shown, a heating rod 43 is provided above the oil drain chamber 40, and the heating rod 43 is electrically connected to the central control module 70.

[0039] Specifically, when the ambient temperature is low or when animal fat needs to be separated, the control module 70 activates the heating rod 43 to heat the oil in the oil draining chamber 40 to prevent the fat from solidifying.

[0040] Preferably, the heating temperature of the heating rod 43 can be set and adjusted in real time by the central control module 70.

[0041] In Example 1, as Figure 2 As shown, the second partition plate 12 is connected to the side wall of the first partition plate 11 and the side wall of the first space respectively; an opening 23 is provided above the second partition plate 12, and a guide pipe 32 is provided at the opening 23; the guide pipe is attached to the second partition plate 12 and is perpendicular to the first partition plate 11 in the horizontal space, so that the water flows out of the guide pipe 32 through the opening 23 and flows along the side wall of the second partition plate 12 and the side wall of the first partition plate 11 to the overflow port 31.

[0042] Preferably, a flow damper 34 is provided below the opening 23.

[0043] like Figure 2 As shown, the arrows indicate the direction of water flow during the use of this device in Embodiment 1.

[0044] By adopting the above scheme, the flow path is extended through the vertical layout of the guide pipe 32, which promotes the natural stratification of oil and water.

[0045] In Example 2, as Figure 5 As shown, the second partition plate 12 is connected to the two side walls of the first space and is parallel to the first partition plate 11. An opening 23 is provided above the second partition plate 12. The opening 23 is located at the end away from the overflow port 31, so that the water flows in from the inlet 21, flows out through the opening 23 and flows along the side wall of the first space and the side wall of the first partition plate 11 to the overflow port 31.

[0046] like Figure 5 As shown, the arrows indicate the direction of water flow during the use of this device in Embodiment 2.

[0047] By adopting the above scheme, the flow path is extended by setting the opening 23 at the end away from the overflow port 31, which promotes the natural separation of oil and water.

[0048] It should be noted that, Figure 5 The remaining structures not shown in Example 2 can be referred to Figure 2 .

[0049] In one embodiment, such as Figure 2 As shown, one end of the drain pipe 51 is located inside the drain chamber 50, and the other end is located inside the third space and passes through the third space to communicate with the outside. An inclined plate 52 is provided below one end of the drain pipe 51 in the drain chamber 50.

[0050] Using the above scheme, an inclined plate 52 is installed below the drain pipe 51. The purpose is to control the water level. The inclined plate 52 is equivalent to a weir structure that can adjust the water flow. When the water level in the device rises, the water gradually overflows the surface of the inclined plate 52 and flows into the drain pipe 51 for discharge.

[0051] In one embodiment, such as Figure 2 and Figure 4 As shown, it also includes a backflow valve 33 respectively disposed below the first partition plate 11 and the second partition plate 12, and a clean water pipe 82 disposed below the liquid inlet chamber 20, wherein the clean water pipe 82 is connected to the outside. When the backflow valve 33 is opened, water flows sequentially from the second space through the buffer chamber 30 to the liquid inlet chamber 20, and is discharged through the clean water pipe 82.

[0052] Using the above scheme, when the device needs drainage or system cleaning, the backflow valve 33 can be opened to flush the pipes with reverse water flow, remove internal sediments, and finally drain the water from the device through the clean water pipe 82.

[0053] In summary, this oil-water separation device employs physical oil-water separation technology, requiring no power source or chemical additives, making it environmentally friendly and energy-saving. Its automated design makes it easy, safe, and efficient to operate, and it replaces traditional grease traps. It is convenient to install, reduces floor space, is easy to clean, and is reusable. Its effectiveness is significant, intercepting over 95% of grease and solid residue in kitchen waste, greatly reducing wastewater treatment costs, effectively preventing sewer blockages and sewage backflow, and reducing environmental pollution from waste oil. The separated grease has a purity of over 95%, which can be recycled to produce biodiesel, achieving resource regeneration.

[0054] Although this document frequently uses terms such as oil-water detection module, centralized control module, electric valve, first partition plate, second partition plate, and third partition plate, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An oil-water separation device, characterized in that, include: The device body (10) has a first partition plate (11), a second partition plate (12) and a third partition plate (13) inside. The first partition plate (11) divides the device body (10) into a first space and a second space. An overflow port (31) is provided above the first partition plate (11) so that the first space and the second space are connected. The first space is provided with a second partition plate (12) to divide the first space into a liquid inlet chamber (20) and a buffer chamber (30). The liquid inlet chamber (20) is provided with a liquid inlet (21). The second partition plate (12) is provided with an opening above it so that the water in the liquid inlet chamber (20) flows into the buffer chamber (30) through the opening. The third partition plate (13) divides the second space into an oil draining chamber (40) and a drainage chamber (50). An oil draining pipe (41) is provided above the oil draining chamber (40), and a drainage pipe (51) is provided above the drainage chamber (50). The third partition plate (13) is connected to the side wall of the first partition plate (11) and the side wall of the second space respectively. Its bottom is separated from the bottom of the second space, so that the oil draining chamber (40) and the drainage chamber (50) are connected. An oil-water detection module (60) is located above the oil drain chamber (40) and includes at least one electrode that contacts the liquid medium; The control module (70) has its signal input terminal electrically connected to the signal output terminal of the oil-water detection module (60), and can generate control signals according to the conduction state between the electrodes; An electric valve (42) is installed on the drain pipe (41). Its signal input end is connected to the signal output end of the central control module (70) to receive control signals and execute the opening and closing action of the drain pipe (41).

2. The oil-water separation device according to claim 1, characterized in that: It also includes a third space located next to the oil drain chamber (40), with one end of the oil drain pipe (41) located inside the oil drain chamber (40) and the other end located inside the third space; An oil storage container (80) is provided below the oil drain pipe (41) located in the third space, and a weight detector (81) is provided below the oil storage container (80).

3. The oil-water separation device according to claim 2, characterized in that: The weight detector (81) is equipped with an alarm device, which is electrically connected to the central control module (70). When the weight of the oil detected by the weight detector (81) exceeds a preset threshold, the central control module (70) triggers the alarm device to issue an alarm signal.

4. The oil-water separation device according to claim 2, characterized in that: The electrode is fixedly installed on the electrode mounting plate (63) above the oil discharge chamber (40); The electrode includes a first electrode (61) and a second electrode (62), both of which are in direct contact with the liquid to form a conductive circuit; Alternatively, the electrode may be a single electrode that is indirectly connected to the liquid via grounding.

5. The oil-water separation device according to claim 1, characterized in that: It also includes a vibration cleaning module installed inside the electrode, which is electrically connected to the central control module (70).

6. The oil-water separation device according to claim 1, characterized in that: A removable filter screen (22) is provided above the liquid inlet chamber (20).

7. The oil-water separation device according to claim 1, characterized in that: A heating rod (43) is provided above the oil drain chamber (40), and the heating rod (43) is electrically connected to the central control module (70).

8. The oil-water separation device according to claim 1, characterized in that: The second partition plate (12) is connected to the side wall of the first partition plate (11) and the side wall of the first space respectively; an opening (23) is provided above the second partition plate (12), and a guide pipe (32) is provided at the opening (23); the guide pipe (32) is attached to the second partition plate (12) and is perpendicular to the first partition plate (11) in the horizontal space, so that the water flows out through the opening (23) and then flows along the side wall of the second partition plate (12) and the side wall of the first partition plate (11) to the overflow port (31). Alternatively, the second partition plate (12) is connected to the two side walls of the first space and is parallel to the first partition plate (11). An opening (23) is provided above the second partition plate (12). The opening (23) is located at the end away from the overflow port (31), so that the water flows in from the inlet (21), flows out through the opening (23), and flows along the side wall of the first space and the side wall of the first partition plate (11) to the overflow port (31).

9. The oil-water separation device according to claim 1, characterized in that: One end of the drain pipe (51) is located inside the drain chamber (50), and the other end is located inside the third space and passes through the third space to communicate with the outside. An inclined plate (52) is provided below one end of the drain pipe (51) located in the drain chamber (50).

10. The oil-water separation device according to claim 1, characterized in that: It also includes a backflow valve (33) respectively located below the first partition plate (11) and the second partition plate (12), and a clean water pipe (82) located below the liquid inlet chamber (20), the clean water pipe (82) being connected to the outside; When the backflow valve (33) is opened, water flows sequentially from the second space through the buffer chamber (30), into the liquid inlet chamber (20), and is discharged through the clean water pipe (82).

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