Mechanical oil-water separator for petrochemical wastewater treatment

Abstract

The utility model discloses a mechanical oil-water separator for petrochemical wastewater treatment, which comprises an oil-water separation tank, a first partition plate is fixedly mounted on one side in the oil-water separation tank, a second partition plate is fixedly mounted on the inner wall of the oil-water separation tank on one side of the first partition plate, and a valve pipe is mounted at the lower end in the second partition plate. A screen frame is mounted in the oil-water separation box on the side, away from the first partition plate, of the second partition plate, an ultrafiltration membrane filter element is arranged on the inner side of the screen frame, an oil stain collection box is arranged at the upper end of the surface of the oil-water separation box, and a blow-off pipe is arranged at the lower end of the surface of the oil stain collection box; a first drain pipe is arranged on the outer wall of the lower end of one side of the oil-water separation tank, and a second drain pipe is arranged on the outer wall of the oil-water separation tank on one side of the first drain pipe. The petrochemical wastewater oil-water separator not only achieves the purpose of oil-water separation of petrochemical wastewater, but also ensures the oil-water separation effect of the petrochemical wastewater when the oil-water separator is used, and improves the maintenance convenience of the oil-water separator.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical wastewater treatment technology, specifically a mechanical oil-water separator for petrochemical wastewater treatment. Background Technology

[0002] In the petrochemical production process, a large amount of wastewater containing oil is generated. If this wastewater is discharged directly, it will cause serious environmental pollution. Therefore, effective oil-water separation treatment is required. Currently, common oil-water separation methods include gravity separation, adsorption, and air flotation. However, most of these methods have problems such as low separation efficiency, large equipment footprint, high operating costs, or poor adaptability to different types of oil. Mechanical oil-water separators, as an effective oil-water separation device, have advantages such as relatively simple structure and stable operation. Therefore, it is particularly important to develop a mechanical oil-water separator for petrochemical wastewater treatment.

[0003] A wastewater treatment oil-water separator, as described in reference announcement number CN206437902U, includes a shell, a water inlet, an oil outlet, a water outlet, and support legs. The shell is characterized by an aeration chamber and an oil-water separation chamber inside. The aeration chamber has a water inlet on one side of its upper portion and an air outlet on one side of the water inlet. An air distribution plate with a plurality of evenly distributed air distribution holes is located on one side of the air distribution plate. An air inlet pipe is located on one side of the air distribution chamber. The oil-water separation chamber has an oil outlet on one side of its lower portion. An oil outlet is provided on one side, and a support leg is provided at the bottom of the outer shell. High-pressure air is installed at the bottom of this oil-water separator. When the compressed air enters the oil-water separator, a sharp change in flow direction and velocity occurs. Then, relying on inertia, oil droplets and water droplets with a density greater than that of compressed air are separated. The oil-water separation effect is good and the oil-water separation efficiency is high, which effectively protects the environment. As can be seen from the above, although this oil-water separator can be well applied, it usually only uses the air flotation method to separate oil and water from wastewater. This makes it difficult for the oil-water separator to achieve the expected separation effect on wastewater, which often troubles users. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical oil-water separator for petrochemical wastewater treatment, in order to solve the problem mentioned in the background art that although oil-water separators can be applied well, they usually only use air flotation to separate oil and water in wastewater, making it difficult for the oil-water separator to achieve the expected separation effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanical oil-water separator for petrochemical wastewater treatment, comprising an oil-water separation tank, a first partition fixedly installed on one side of the interior of the oil-water separation tank, a second partition fixedly installed on the inner wall of the oil-water separation tank on the side of the first partition, a valve pipe installed at the lower end of the interior of the second partition, both ends of the valve pipe extending to the outside of the second partition, a mesh frame installed inside the oil-water separation tank on the side of the second partition away from the first partition, an ultrafiltration membrane filter element provided on the inner side of the mesh frame, an oil collection tank provided at the upper end of the surface of the oil-water separation tank, a drain pipe provided at the lower end of the surface of the oil collection tank, a valve installed on the outer wall of the drain pipe, a groove provided at the top of the oil-water separation tank above the oil collection tank, a guide frame installed on the inner side of the groove, one end of the guide frame connected to the top of the oil collection tank, a first drain pipe provided on the lower outer wall of one side of the oil-water separation tank, and a second drain pipe provided on the outer wall of the oil-water separation tank on the side of the first drain pipe.

[0006] Preferably, the outer surface of the oil-water separator away from the oil collection tank is provided with an air injection pipe, the bottom end of which extends into the interior of the oil-water separator. The air injection pipe is provided so that compressed air can be injected into the petrochemical wastewater on the right side inside the oil-water separator.

[0007] Preferably, a first limiting plate is fixed on the inner walls of both sides of the oil-water separator on one side of the mesh frame. The inner wall of the first limiting plate is in contact with the outer wall of the mesh frame. The mesh frame is positioned and limited by the setting of the first limiting plate.

[0008] Preferably, a second limiting plate is fixedly installed on the inner wall of the oil-water separator on the side of the mesh frame away from the first limiting plate. The inner wall of the second limiting plate is in contact with the outer wall of the mesh frame. The second limiting plate is used to limit the positioning of the mesh frame.

[0009] Preferably, a nut seat is provided on the outer wall of the second limiting plate away from the mesh frame, and a pin hole is provided inside the mesh frame. The nut seat is provided to allow the screw to be threaded.

[0010] Preferably, a screw is threaded on the inside of the nut seat, one end of the screw extends to the outside of the nut seat and is fitted with a handle, and a pin is provided at the end of the screw away from the handle. The end of the pin away from the screw passes through the second limiting plate and extends into the interior of the pin hole. By rotating the handle, the screw is driven to rotate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the mechanical oil-water separator for petrochemical wastewater treatment not only achieves the purpose of separating oil and water in petrochemical wastewater, but also ensures the oil-water separation effect of petrochemical wastewater during use, and improves the convenience of oil-water separator maintenance.

[0012] (1) By injecting petrochemical wastewater into the oil-water separation tank on the right side of the first partition and injecting compressed air into the wastewater inside the oil-water separation tank on the right side of the first partition through the air injection pipe, micro bubbles can be generated in the water by the air flotation method. The oil-water separation is achieved by the adhesion between the bubbles and the oil droplets. As the wastewater on the right side of the first partition increases, the wastewater after air flotation separation flows into the oil-water separation tank between the second partition and the first partition. Since the oil and water are on the upper layer and the water source is on the lower layer, the upper layer oil and water are guided by the guide frame to flow into the oil collection tank, while the lower layer water source flows into the left side of the oil-water separation tank through the valve pipe, thereby achieving the purpose of oil-water separation of petrochemical wastewater.

[0013] (2) A mesh frame is installed inside the oil-water separation tank located on the left side of the second partition, and an ultrafiltration membrane filter element is installed on the inner side of the mesh frame. When the water source after air flotation separation flows into the left side of the oil-water separation tank, this part of the water source passes through the ultrafiltration membrane filter element and is discharged through the first drain pipe and the second drain pipe. During this process, the ultrafiltration membrane filter element adsorbs and filters the oil in this part of the water source, and performs oil separation of wastewater in a dual manner, thereby ensuring the oil-water separation effect of petrochemical wastewater when the oil-water separator is used.

[0014] (3) By turning the handle, the drive screw is rotated and slid inside the nut seat, so that the screw drives the pin to move and be removed to the outside of the pin hole. At this time, pull the screen frame upward to remove the screen frame to the outside of the oil-water separator, so as to clean and maintain the ultrafiltration membrane filter element inside the screen frame, or to replace the screen frame and ultrafiltration membrane filter element, thereby improving the convenience of oil-water separator maintenance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is a bottom view of the oil-water separator of this utility model.

[0019] In the diagram: 1. Oil-water separator; 2. Mesh frame; 201. Ultrafiltration membrane filter element; 3. Second partition; 4. First partition; 5. Air injection pipe; 6. Groove; 7. Flow guide frame; 8. Oil collection tank; 9. Drain pipe; 10. Valve; 11. First drain pipe; 12. Second drain pipe; 13. Valve pipe; 14. First limiting plate; 15. Second limiting plate; 16. Nut seat; 17. Screw; 18. Handle; 19. Pin; 20. Pin hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figure 1-4 An embodiment of this utility model is provided: a mechanical oil-water separator for petrochemical wastewater treatment, including an oil-water separation tank 1, an air injection pipe 5 on the outer surface of the oil-water separation tank 1 away from the oil collection tank 8, and the bottom end of the air injection pipe 5 extending into the interior of the oil-water separation tank 1.

[0022] In use, compressed air is injected into the petrochemical wastewater on the right side inside the oil-water separator 1 through the air injection pipe 5.

[0023] A first partition 4 is fixedly installed on one side of the oil-water separator 1. A second partition 3 is fixedly installed on the inner wall of the oil-water separator 1 on the side of the first partition 4. A valve pipe 13 is installed at the lower end of the second partition 3. Both ends of the valve pipe 13 extend to the outside of the second partition 3. A mesh frame 2 is installed inside the oil-water separator 1 on the side of the second partition 3 away from the first partition 4. A first limiting plate 14 is fixed on both inner walls of the oil-water separator 1 on the side of the mesh frame 2. The inner wall of the first limiting plate 14 contacts the outer wall of the mesh frame 2.

[0024] In use, the first limiting plate 14 is set to limit the placement of the wire frame 2;

[0025] A second limiting plate 15 is fixedly installed on the inner wall of the oil-water separator 1 on the side of the mesh frame 2 away from the first limiting plate 14, and the inner wall of the second limiting plate 15 is in contact with the outer wall of the mesh frame 2.

[0026] In use, the second limiting plate 15 is used to limit the placement of the wire frame 2;

[0027] The second limiting plate 15 has a nut seat 16 on the outer wall of the side away from the mesh frame 2, and the mesh frame 2 has a pin hole 20 inside.

[0028] In use, the nut seat 16 is provided to allow the screw 17 to be threaded in.

[0029] A screw 17 is installed on the internal thread of the nut seat 16. One end of the screw 17 extends to the outside of the nut seat 16 and is fitted with a handle 18. A pin 19 is provided at the end of the screw 17 away from the handle 18. The end of the pin 19 away from the screw 17 passes through the second limiting plate 15 and extends into the interior of the pin hole 20.

[0030] In use, the screw 17 is driven to rotate by turning the handle 18;

[0031] The inner side of the mesh frame 2 is provided with an ultrafiltration membrane filter element 201. The upper end of the surface of the oil-water separation tank 1 is provided with an oil collection tank 8. The lower end of the surface of the oil collection tank 8 is provided with a drain pipe 9. A valve 10 is installed on the outer wall of the drain pipe 9. The top of the oil-water separation tank 1 above the oil collection tank 8 is provided with a groove 6. A guide frame 7 is installed on the inner side of the groove 6. One end of the guide frame 7 is connected to the top of the oil collection tank 8. A first drain pipe 11 is provided on the lower outer wall of one side of the oil-water separation tank 1. A second drain pipe 12 is provided on the outer wall of the oil-water separation tank 1 on the side of the first drain pipe 11.

[0032] In this embodiment, petrochemical wastewater is first injected into the oil-water separation tank 1 on the right side of the first partition 4. Compressed air is then injected into the wastewater inside the oil-water separation tank 1 on the right side of the first partition 4 via the air injection pipe 5. This generates microbubbles in the water using the air flotation method. Oil-water separation is achieved by utilizing the adhesion between the bubbles and oil droplets. As the wastewater on the right side of the first partition 4 increases, the wastewater separated by air flotation flows into the oil-water separation tank 1 between the second partition 3 and the first partition 4. Because the oil and water are on the upper layer and the water source is on the lower layer, the upper layer of oil and water is guided by the guide frame 7 into the oil collection tank 8, while the lower layer of water flows into the left side of the oil-water separation tank 1 through the valve pipe 13, thus performing oil-water separation on the petrochemical wastewater. Afterwards, a mesh frame 2 is installed inside the oil-water separation tank 1 located on the left side of the second partition 3. An ultrafiltration membrane filter element 201 is installed inside the mesh frame 2. When the water source after air flotation separation flows into the left side of the oil-water separation tank 1, this part of the water source passes through the ultrafiltration membrane filter element 201 and is discharged through the first drain pipe 11 and the second drain pipe 12. During this process, the ultrafiltration membrane filter element 201 adsorbs and filters the oil in this part of the water source, and performs oil-water separation of wastewater in a dual manner to improve the oil-water separation effect of petrochemical wastewater. Finally, by turning the handle 18, the screw 17 is driven to rotate and slide inside the nut seat 16, so that the screw 17 drives the pin 19 to move and be removed to the outside of the pin hole 20. At this time, the mesh frame 2 is pulled upward to remove the mesh frame 2 to the outside of the oil-water separation tank 1, so as to disassemble and maintain the mesh frame 2 and the ultrafiltration membrane filter element 201, thereby completing the use of the oil-water separator.

Claims

1. A mechanical oil-water separator for petrochemical wastewater treatment, characterized in that: The system includes an oil-water separator (1), with a first partition (4) fixedly installed on one side of the interior of the oil-water separator (1). A second partition (3) is fixedly installed on the inner wall of the oil-water separator (1) on one side of the first partition (4). A valve pipe (13) is installed at the lower end of the interior of the second partition (3), with both ends of the valve pipe (13) extending to the outside of the second partition (3). A mesh frame (2) is installed inside the oil-water separator (1) on the side of the second partition (3) away from the first partition (4). An ultrafiltration membrane filter element (201) is provided on the inner side of the mesh frame (2). The surface of the oil-water separator (1) is... An oil collection tank (8) is provided at one end. A drain pipe (9) is provided at the lower end of the surface of the oil collection tank (8). A valve (10) is installed on the outer wall of the drain pipe (9). A groove (6) is provided on the top of the oil-water separator (1) above the oil collection tank (8). A guide frame (7) is installed on the inner side of the groove (6). One end of the guide frame (7) is connected to the top of the oil collection tank (8). A first drain pipe (11) is provided on the lower outer wall of one side of the oil-water separator (1). A second drain pipe (12) is provided on the outer wall of the oil-water separator (1) on one side of the first drain pipe (11).

2. The mechanical oil-water separator for petrochemical wastewater treatment according to claim 1, characterized in that: The oil-water separator (1) has an air injection pipe (5) on its outer surface away from the oil collection tank (8), and the bottom end of the air injection pipe (5) extends into the interior of the oil-water separator (1).

3. A mechanical oil-water separator for petrochemical wastewater treatment according to claim 1, characterized in that: The inner walls of the oil-water separator (1) on both sides of the mesh frame (2) are fixed with first limiting plates (14), and the inner wall of the first limiting plates (14) is in contact with the outer wall of the mesh frame (2).

4. A mechanical oil-water separator for petrochemical wastewater treatment according to claim 3, characterized in that: A second limiting plate (15) is fixedly installed on the inner wall of the oil-water separator (1) on the side of the mesh frame (2) away from the first limiting plate (14), and the inner wall of the second limiting plate (15) is in contact with the outer wall of the mesh frame (2).

5. A mechanical oil-water separator for petrochemical wastewater treatment according to claim 4, characterized in that: The second limiting plate (15) has a nut seat (16) on the outer wall away from the wire mesh frame (2), and the wire mesh frame (2) has a pin hole (20) inside.

6. A mechanical oil-water separator for petrochemical wastewater treatment according to claim 5, characterized in that: The nut seat (16) is threaded with a screw (17). One end of the screw (17) extends to the outside of the nut seat (16) and is fitted with a handle (18). The end of the screw (17) away from the handle (18) is provided with a pin (19). The end of the pin (19) away from the screw (17) passes through the second limiting plate (15) and extends into the interior of the pin hole (20).

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