Wastewater barrier purification device

Abstract

This application relates to a wastewater barrier and purification device, belonging to the field of wastewater barrier and purification. It includes a water tank and a cover above the tank. The cover is connected to a flue gas pipe and has a spray head on its top. A return port on the side wall of the water tank is connected to the spray head via a supply pipe and a water pump. A filter screen is located inside the return port. A gate covering the top of the return port and a lifting mechanism for adjusting its coverage are slidably installed inside the water tank. An inverted "U"-shaped sealing strip is located on the side of the gate near the filter screen. The water tank is also connected to a purification chamber via a purification pipe and a return pipe. The purification chamber contains a filter cotton chamber and an oil float chamber, separated by an oil float baffle with a flow gap at the bottom. The connection point between the return pipe and the purification chamber is located in the middle of the oil float chamber and is covered by an activated carbon plate. A filter is connected in series with the return pipe, and an oil extraction pipe is located on the top of the oil float chamber. This application achieves the purpose of effectively blocking and purifying wastewater, treating impurities and floating oil in the wastewater, and improving the wastewater purification effect.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a wastewater barrier and purification device. Background Technology

[0002] In the field of wastewater treatment technology, with the continuous development of industry, the demand for wastewater treatment is increasing. Especially in industrial production processes, flue gas treatment has become a crucial link, and wastewater barrier purification devices, as supporting equipment for flue gas scrubbing towers, play a key role in treating wastewater containing smoke and oil. They ensure the normal operation of flue gas treatment in industrial production, reduce wastewater pollution to the environment, improve the environmental friendliness and sustainability of the production process, and are of great significance for promoting green industrial development.

[0003] Related technologies typically include flue gas scrubbing towers and wastewater treatment devices comprising a water tank and a hood above the tank. The hood is connected to a flue gas pipe, and spray heads are installed on the top of the hood. A return port is located on the side wall of the water tank, and the return port is connected to the spray heads via a supply pipe and a water pump to achieve water circulation. Furthermore, a filter screen is installed inside the water tank near the return port for coarse filtration.

[0004] The aforementioned technologies have the following drawbacks: the wastewater dripping during the spraying process usually contains oil, which floats on the surface of the water inside the tank. When the oil layer is at the same height as the return port, the surface oil can easily participate in the circulating water supply through the return hole, affecting the subsequent treatment effect of smoke and dust. Summary of the Invention

[0005] To reduce the backflow of surface oil, this application provides a wastewater barrier and purification device.

[0006] The wastewater barrier and purification device provided in this application adopts the following technical solution: A wastewater barrier and purification device includes a water tank and a cover above the water tank. The cover is connected to a flue pipe, and a spray head is provided on the top of the cover. A return port is provided on the side wall of the water tank. The return port is connected to the spray head through a liquid supply pipe and a water pump. A filter screen is provided inside the return port. A gate is also slidably provided inside the water tank, and the gate covers the top of the return port. The water tank is also provided with a lifting mechanism for adjusting the degree to which the gate covers the return port.

[0007] By adopting the above technical solution, this application adjusts the gate height through a lifting mechanism. The gate acts as a barrier between the surface oil inside the water tank and the top of the return port. During water circulation, the surface oil continues to accumulate under the action of the gate, making it difficult for it to directly pass through the filter screen and enter the return port for circulation. Therefore, the treatment effect in the subsequent flue gas treatment process can still be guaranteed, and the oil content of the sprayed water droplets can be effectively controlled. When the height or thickness of the surface oil inside the water tank changes, the gate height can also be adaptively adjusted through the lifting mechanism.

[0008] Preferably, a sealing strip is provided on the side of the gate near the filter screen. The sealing strip is in the shape of an inverted "U" and is located on the outer periphery of the top of the return port.

[0009] By adopting the above technical solution, a sealing strip in the shape of an inverted "U" and located on the outer periphery of the top of the return port is set on the side of the gate near the filter screen. This can further enhance the barrier effect of the gate on the surface oil inside the water tank and the top of the return port, and more effectively prevent the surface oil from passing through the filter screen from the gap at the top of the gate and entering the return port to participate in the circulation, thus ensuring the effect of subsequent flue gas treatment and controlling the oil content of the spray water droplets.

[0010] Preferably, the water tank is also connected to a purification chamber via a purification pipe and a return pipe, and the purification chamber is equipped with a filter cotton compartment, which contains filter cotton.

[0011] By adopting the above technical solution, a purification box is set in the sewage barrier purification device, which is connected to the water tank through a purification pipe and a return pipe. The purification box is equipped with a filter cotton chamber containing filter cotton, which can filter the sewage in the water tank, reduce the impurity content in the sewage, and improve the purification degree of the sewage.

[0012] Preferably, the purification chamber is further provided with an oil floating chamber, and the filter cotton chamber and the oil floating chamber are separated by an oil floating baffle inside the water tank, and there is a flow gap between the bottom of the oil floating baffle and the bottom of the purification chamber.

[0013] By adopting the above technical solution, the purification pipe pumps the sewage inside the water tank to the top of the filter cotton chamber. After being filtered by the filter cotton, the sewage enters the oil floating chamber through the flow gap at the bottom. The return pipe can be used to extract the water with lower oil content from the lower layer of the oil floating chamber and return it to the water tank, reducing the return of surface oil and ensuring the subsequent flue gas treatment effect, and effectively controlling the oil content of the spray water droplets.

[0014] Preferably, the connection between the reflux pipe and the purification tank is located in the middle of the floating oil tank.

[0015] By adopting the above technical solution, the purification pipe pumps the sewage to the filter cotton chamber, where it is filtered and then enters the oil floating chamber. The floating oil rises and accumulates at the top, reducing the oil content in the middle and lower layers of water. The connection between the return pipe and the purification box is located in the middle of the oil floating chamber, which can extract the middle and lower layers of water with even lower oil content and return them to the water tank, further reducing the oil content in the returned water.

[0016] Preferably, the oil spill containment tank is equipped with an activated carbon plate, which covers the connection between the return pipe and the purification tank.

[0017] By adopting the above technical solution, the connection between the activated carbon plate sealing the return pipe and the purification box can further adsorb impurities and odors in the water, thereby improving the quality of the water returning to the water tank.

[0018] Preferably, the return pipe is connected in series with a filter.

[0019] By adopting the above technical solution, the water tank is connected to the purification box containing filter cotton chamber and filter cotton through the purification pipe and the return pipe. The return pipe is connected in series with a filter, which can further filter impurities in the water returning from the purification box to the water tank, improve the cleanliness of the return water, and ensure the effect of subsequent flue gas treatment.

[0020] Preferably, an oil extraction pipe is provided at the top of the floating oil tank.

[0021] By adopting the above technical solution, the oil extraction pipe is set at the top of the floating oil tank, which can extract the floating oil accumulated at the top of the floating oil tank, periodically reduce the accumulation of floating oil in the purification tank, further reduce the oil content of the circulating water, and improve the sewage purification effect.

[0022] Preferably, the lifting mechanism includes a floating frame and a float. The floating frame is disposed on the inner wall of the water tank, and the float is slidably connected to the floating frame. An oleophilic conveyor belt assembly is also disposed inside the water tank. The lower edge of the oleophilic conveyor belt assembly is higher than the lower edge of the gate. The float is connected to both the gate and the oleophilic conveyor belt assembly.

[0023] By adopting the above technical solution, the float can automatically adjust the height of the gate according to the rise and fall of the liquid level in the water tank, so that the gate can always effectively cover the top of the return port without manual or external power intervention; at the same time, the oleophilic conveyor belt assembly rises and falls synchronously under the drive of the float, and its lower edge always remains in the oil layer, which facilitates the active adsorption and scraping of the surface oil, further reducing the oil content in the water and improving the automation level and oil pollution treatment efficiency of the device.

[0024] Preferably, the oleophilic conveyor belt assembly includes an oil-scraping frame, a pair of pulleys, an annular oleophilic conveyor belt, and oil-scraping blades. The oil-scraping frame is connected to the float, and both pulleys are rotatably connected to the oil-scraping frame. The annular oleophilic conveyor belt is wound around the outside of the two pulleys, and the oil-scraping blades are evenly distributed on the outside of the annular oleophilic conveyor belt. A return funnel is provided at the bottom of the cover, and a turbine is provided below the water outlet of the return funnel on the cover. The turbine is connected to one of the pulleys through a turbine shaft.

[0025] By adopting the above technical solution, the sprayed water flows down through the return funnel, impacting the turbine. The turbine rotates and drives the pulley to rotate, thereby driving the annular oleophilic conveyor belt to circulate. After the oleophilic conveyor belt absorbs floating oil, the oil is scraped off by the oil scraper and collected. This structure uses the gravitational potential energy of the falling water flow as a power source, requiring no additional electrical energy consumption, thus saving energy and being environmentally friendly. At the same time, it achieves adaptive and continuous removal of floating oil, effectively preventing the floating oil from accumulating too thickly on the surface of the water tank and entering the circulating water path, ensuring the long-term stability of the sprayed water quality.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The height of the gate is adjusted by the lifting mechanism. The gate separates the surface oil inside the water tank from the top of the return port, making it difficult for the surface oil to enter the return port and participate in the circulation, thus ensuring the effect of subsequent flue gas treatment and controlling the oil content of the spray water droplets. 2. The inverted "U"-shaped sealing strip on the side of the gate near the filter screen is located on the top periphery of the return port, which can enhance the blocking effect on floating oil; 3. The water tank is connected to the purification tank through the purification pipe and the return pipe. The filter cotton chamber and the oil floating chamber in the purification tank work together to further reduce the oil content of the water returning to the water tank. 4. By setting up a floating frame and float, the gate and oleophilic conveyor belt assembly can be automatically raised and lowered with the liquid level, reducing the frequency of manual adjustment and improving the adaptability of the device to different working conditions; 5. By setting up an oil-loving conveyor belt assembly driven by a turbine, the kinetic energy of the sprayed water is used to actively collect and scrape off the surface oil. No external power supply is required, which is energy-saving and efficient, further reducing the oil content of the circulating water and improving the sewage purification effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0028] Figure 2 This is a schematic diagram of the structure used to illustrate the positional relationship between the gate and the return port in Embodiment 1 of this application.

[0029] Figure 3 This is a schematic diagram of the structure used in Embodiment 1 of this application to illustrate the connection relationship between the filter cotton bin and the floating oil bin.

[0030] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0031] Figure 5 This is a schematic diagram illustrating the connection between the pontoon and the gate in Embodiment 2 of this application.

[0032] Figure 6 This is a schematic diagram illustrating the structure of the oleophilic conveyor belt assembly in Embodiment 2 of this application.

[0033] Figure 7 This is a schematic diagram of the structure used to illustrate the connection between the reflux funnel and the turbine in Embodiment 2 of this application.

[0034] In the picture: 1. Water tank; 10. Return port; 11. Cover; 12. Flue pipe; 13. Spray head; 14. Liquid supply pipe; 15. Water pump; 16. Filter screen; 2. Gate; 21. Lifting mechanism; 22. Sealing strip; 3. Purification box; 31. Purification pipe; 32. Return pipe; 33. Filter cotton chamber; 34. Oil floating chamber; 35. Oil floating baffle; 36. Filter cotton; 37. Activated carbon plate; 38. Oil extraction pipe; 4. Filter; 5. Floating frame; 51. Float; 52. Oleophilic conveyor belt assembly; 521. Oil scraper frame; 522. Pulley; 523. Annular oleophilic conveyor belt; 524. Oil scraper; 53. Return funnel; 54. Turbine; 55. Turbine shaft. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are also within the protection scope of the present invention.

[0036] This application mainly adopts adjustable gate 2 and purification box 3 to reduce oil backflow and purify sewage, thereby reducing the backflow of surface oil into the circulation and ensuring the effect of flue gas treatment. The following is a further detailed description of this application.

[0037] Example 1

[0038] Reference Figure 1 and Figure 2The wastewater barrier and purification device provided in this application includes a water tank 1, a cover 11 above the water tank 1, a flue gas pipe 12, a spray head 13, a liquid supply pipe 14, a water pump 15, a filter screen 16, a gate 2, and a lifting mechanism 21. The cover 11 is connected to the flue gas pipe 12, and the spray head 13 is installed on the top of the cover 11. A return port 10 is provided on the side wall of the water tank 1. The return port 10 is connected to the spray head 13 through the liquid supply pipe 14 and the water pump 15. The return port 10 is internally equipped with... The filter screen 16 and the gate 2 are slidably installed inside the water tank 1. The gate 2 covers the top of the return port 10. The water tank 1 is equipped with a lifting mechanism 21 to adjust the degree to which the gate 2 covers the return port 10. In this way, the gate 2 can be used to block the floating oil on the surface of the water tank 1 from the top of the return port 10, so that the floating oil on the surface is not easy to enter the return port 10 to participate in the circulation, ensuring the subsequent flue gas treatment effect. The bottom height of the gate 2 can also be adjusted according to the change of floating oil thickness or bottom height.

[0039] Specifically, the hood 11 is typically made of metal, such as stainless steel, and is mostly square or round in shape, offering good sealing and corrosion resistance. High-strength plastic can also be used to reduce weight and cost. The hood 11 is connected to the flue gas pipe 12 by welding or flanges to ensure a secure and well-sealed connection. The flue gas pipe 12 is generally a circular pipe, also typically made of stainless steel or carbon steel, used to transport flue gas from industrial production processes.

[0040] The spray head 13 is typically an atomizing spray head, capable of evenly spraying water inside the hood 11 to thoroughly treat the flue gas. The spray head 13 is installed on the top of the hood 11 and secured by threaded or snap-fit ​​connections. The supply pipe 14 is generally made of PVC or rubber, offering good flexibility and corrosion resistance, and is connected to the return port 10 and the water pump 15 via pipe clamps. The water pump 15 can be a centrifugal pump or a self-priming pump, providing power for water circulation.

[0041] The filter screen 16 is typically made of stainless steel and has a specific pore size, enabling it to perform coarse filtration of wastewater and remove larger impurities. The filter screen 16 is installed inside the return port 10 and secured by a slot or bolts.

[0042] The gate 2 is usually made of metal, such as aluminum or iron, and its size is sufficient to cover the top of the return port 10. A sealing strip 22 is provided on the side of the gate 2 near the filter screen 16. The sealing strip 22 fits against the inner wall of the water tank 1 and is in an inverted "U" shape. It is located on the outer periphery of the top of the return port 10. The sealing strip 22 is generally made of rubber and has good sealing performance, which can further prevent oil from entering the return port 10.

[0043] The lifting mechanism 21 can be an electric push rod or a hydraulic push rod. The electric push rod drives the lead screw to rotate through a motor, thereby realizing the lifting and lowering of the gate 2; the hydraulic push rod is powered by a hydraulic system. The lifting mechanism 21 is installed on the outside or inside of the water tank 1 and is connected to the gate 2 through a connector to realize the adjustment of the height of the gate 2.

[0044] The assembly logic of these components is as follows: Industrial flue gas enters the hood 11 through the flue pipe 12, and the spray head 13 sprays the flue gas to treat it. Wastewater containing soot and oil drips into the water tank 1. The wastewater in the water tank 1 returns to the spray head 13 for circulation through the return port 10, the supply pipe 14, and the water pump 15. During this process, the filter screen 16 performs coarse filtration of the wastewater, and the gate 2, under the adjustment of the lifting mechanism 21, blocks the surface oil, reducing the amount of oil entering the return port 10 and participating in the circulation.

[0045] Reference Figure 3 Specifically, water tank 1 is connected to purification chamber 3 via purification pipe 31 and return pipe 32. Purification pipe 31 is used to transport wastewater from water tank 1 to purification chamber 3, and return pipe 32 is used to transport treated water from purification chamber 3 to water tank 1. Purification chamber 3 is equipped with filter cotton chamber 33 and oil floating chamber 34. Filter cotton chamber 33 and oil floating chamber 34 are separated by oil floating baffle 35 inside water tank 1. There is a flow gap between the bottom of oil floating baffle 35 and the bottom of purification chamber 3.

[0046] The purification pipe 31 and return pipe 32 are generally made of PVC or rubber pipes and are connected to the water tank 1 and purification box 3 by pipe clamps. The purification box 3 is usually a square box made of stainless steel or plastic, which has good corrosion resistance. The filter cotton chamber 33 is equipped with filter cotton 36, which is generally made of polyester fiber filter cotton 36, which can further filter the sewage and intercept fine impurities and some oil stains.

[0047] The oil floatation tank 34 is used to collect floating oil in sewage. The connection between the return pipe 32 and the purification tank 3 is located in the lower middle part of the oil floatation tank 34. An activated carbon plate 37 is installed inside the oil floatation tank 34, and the activated carbon plate 37 covers the connection between the return pipe 32 and the purification tank 3. The activated carbon plate 37 is generally made of granular activated carbon, which can partially adsorb odors and some oil stains in sewage.

[0048] The assembly logic of these components is as follows: Wastewater in water tank 1 enters the filter cotton chamber 33 of purification box 3 through purification pipe 31, is filtered by filter cotton 36, and then enters the oil floating chamber 34 through the flow gap at the bottom of the oil floating baffle 35. The oil in the oil floating chamber 34 will gradually rise and accumulate at the top of the oil floating chamber 34, while the water in the middle and lower layers has a lower oil content. The return pipe 32 draws the water in the middle and lower layers of the oil floating chamber 34 and returns it to the inside of water tank 1 for further purification of wastewater.

[0049] Reference Figure 3 The return pipe 32 is also connected in series with a filter 4, which can be a ceramic filter 4 or a fiber filter 4, to further filter the returned water and remove impurities and oil. An oil extraction pipe 38 is installed at the top of the oil float 34. The oil extraction pipe 38 is generally made of PVC or rubber and is connected to the oil float 34 via a pipe clamp. It can be used to periodically extract the floating oil from the top of the oil float 34 to prevent excessive floating oil from affecting the purification effect.

[0050] By connecting the filter 4 in series on the return pipe 32, the quality of the return water can be further improved, reducing the impact of impurities and oil on subsequent treatment. The oil extraction pipe 38 allows for timely cleaning of the floating oil on top of the oil sump 34, maintaining the normal operation of the oil sump 34 and improving the purification efficiency and stability of the entire device. Compared to existing technologies, this better solves the problems of oil pollution treatment and water purification.

[0051] The implementation principle of this embodiment is as follows: The wastewater barrier and purification device uses an adjustable gate 2 to block the floating oil on the surface of the water tank 1, reducing the backflow of surface oil into the circulation and ensuring the effectiveness of subsequent flue gas treatment. Simultaneously, the purification tank 3 further purifies the wastewater, reducing the oil content and improving the overall wastewater treatment capacity of the device. Compared with existing technologies, this device effectively solves the problem of surface oil backflow, improving the efficiency and quality of flue gas treatment.

[0052] Example 2

[0053] This embodiment is structurally similar to the first embodiment, but the difference lies in the specific implementation of the lifting mechanism and its related linkage components.

[0054] Reference Figure 4 and Figure 5 In this embodiment, the lifting mechanism includes a floating frame 5 and a float 51. The floating frame 5 is fixedly installed on the inner wall of the water tank 1, and the float 51 is slidably connected to the floating frame 5, so that the float 51 can float up and down along the floating frame 5 according to the liquid level change in the water tank 1. An oleophilic conveyor belt assembly 52 is also provided inside the water tank 1, and the lower edge of the oleophilic conveyor belt assembly 52 is higher than the lower edge of the gate 2. The float 51 is connected to both the gate 2 and the oleophilic conveyor belt assembly 52. ​​When the float 51 rises and falls with the liquid level, it can synchronously drive the gate 2 and the oleophilic conveyor belt assembly 52 to move up and down.

[0055] Specifically, refer to Figure 5 and Figure 6The oleophilic conveyor belt assembly 52 includes an oil-scraping frame 521, a pair of pulleys 522, an annular oleophilic conveyor belt 523, and oil-scraping blades 524. The oil-scraping frame 521 is connected to the float 51, so it can rise and fall together with the float 51. Both pulleys 522 are rotatably connected to the oil-scraping frame 521, and the annular oleophilic conveyor belt 523 is wound around the outside of the two pulleys 522. The oil-scraping blades 524 are evenly distributed on the outside of the annular oleophilic conveyor belt 523 and are used to adsorb and scrape off the floating oil on the surface of the water.

[0056] Reference Figure 5 and Figure 7 Furthermore, a return funnel 53 is provided at the bottom of the cover 11 to collect the wastewater after spraying and guide it into the water tank 1. A turbine 54 (suspended) is provided below the drain outlet of the return funnel 53 on the cover 11. The turbine 54 is fixedly connected to one of the pulleys 522 via a turbine shaft 55. When the wastewater after spraying falls from the return funnel 53, the water flow impacts the turbine 54, causing it to rotate. The turbine 54 drives the pulley 522 to rotate via the turbine shaft 55, thereby driving the annular oleophilic conveyor belt 523 to operate. During operation, the oil scraper 524 on the annular oleophilic conveyor belt 523 scrapes up the floating oil on the surface of the water tank 1 and transports it in a specific direction, facilitating the active collection of floating oil in conjunction with other components.

[0057] The working principle of this embodiment is as follows: the float 51 automatically rises and falls with the change of liquid level in the water tank 1, and drives the gate 2 to rise and fall synchronously, so that the lower edge of the gate 2 is always kept at a suitable depth below the liquid surface, effectively preventing surface oil from entering the return port 10. At the same time, the float 51 drives the oil-loving conveyor belt assembly 52 to rise and fall, so that its lower edge always maintains the optimal contact height with the liquid surface. The kinetic energy of the sprayed water drives the turbine 54, which in turn drives the annular oil-loving conveyor belt 523 to operate, continuously collecting surface oil. This scheme realizes automatic adjustment of the gate height and the oil collection mechanism, without the need for external power, is energy-saving and efficient, and further improves the device's ability to block and purify surface oil.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wastewater barrier and purification device, characterized in that: Includes a water tank (1) and a cover (11) above the water tank (1). The cover (11) is connected to a flue pipe (12). A spray head (13) is provided on the top of the cover (11). A return port (10) is provided on the side wall of the water tank (1). The return port (10) is connected to the spray head (13) through a liquid supply pipe (14) and a water pump (15). A filter screen (16) is provided inside the return port (10). A gate (2) is also slidably provided inside the water tank (1). The gate (2) covers the top of the return port (10). The water tank (1) is also provided with a lifting mechanism (21) for adjusting the degree to which the gate (2) covers the return port (10).

2. The wastewater barrier and purification device according to claim 1, characterized in that: A sealing strip (22) is provided on the side of the gate (2) near the filter screen (16). The sealing strip (22) is in the shape of an inverted "U" and is located on the outer periphery of the top of the return port (10).

3. The wastewater barrier and purification device according to claim 1, characterized in that: The water tank (1) is also connected to a purification box (3) through a purification pipe (31) and a return pipe (32). The purification box (3) is equipped with a filter cotton chamber (33), and the filter cotton chamber (33) is equipped with filter cotton (36).

4. The wastewater barrier and purification device according to claim 3, characterized in that: The purification box (3) is also equipped with an oil floating chamber (34). The filter cotton chamber (33) and the oil floating chamber (34) are separated by an oil floating baffle (35) inside the water tank (1). There is a flow gap between the bottom of the oil floating baffle (35) and the bottom of the purification box (3).

5. The wastewater barrier and purification device according to claim 4, characterized in that: The connection between the return pipe (32) and the purification box (3) is located in the middle of the floating oil tank (34).

6. The wastewater barrier and purification device according to claim 5, characterized in that: The floating oil tank (34) is equipped with an activated carbon plate (37), which covers the connection between the return pipe (32) and the purification box (3).

7. The wastewater barrier and purification device according to claim 3, characterized in that: The return pipe (32) is connected in series with a filter (4).

8. The wastewater barrier and purification device according to claim 4, characterized in that: The top of the floating oil tank (34) is equipped with an oil extraction pipe (38).

9. The wastewater barrier and purification device according to claim 1, characterized in that: The lifting mechanism includes a floating frame (5) and a float (51). The floating frame (5) is set on the inner wall of the water tank (1). The float (51) is slidably connected to the floating frame (5). An oil-loving conveyor belt assembly (52) is also provided inside the water tank (1). The lower edge of the oil-loving conveyor belt assembly (52) is higher than the lower edge of the gate (2). The float (51) is connected to both the gate (2) and the oil-loving conveyor belt assembly (52).

10. The wastewater barrier and purification device according to claim 9, characterized in that: The oleophilic conveyor belt assembly (52) includes an oil-scraping frame (521), a pair of pulleys (522), an annular oleophilic conveyor belt (523), and oil-scraping plates (524). The oil-scraping frame (521) is connected to the float (51), and both pulleys (522) are rotatably connected to the oil-scraping frame (521). The annular oleophilic conveyor belt (523) is wrapped around the outside of the two pulleys (522), and the oil-scraping plates (524) are evenly distributed on the outside of the annular oleophilic conveyor belt (523). A return funnel (53) is provided at the bottom of the cover (11), and a turbine (54) is provided below the water outlet of the return funnel (53) in the cover (11). The turbine (54) is connected to one of the pulleys (522) through a turbine shaft (55).

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