A sewage treatment system

Abstract

The application relates to a sewage treatment system and relates to the technical field of sewage treatment.The sewage treatment system comprises a rack, a sedimentation tank and a separation tank, the separation tank is arranged on the rack, water inlet pipes and water outlet pipes are arranged on the sedimentation tank, an oil discharge port is arranged in the side wall of the sedimentation tank, a rotating shaft is vertically arranged above the sedimentation tank, a separation assembly for discharging upper-layer floating oil from the oil discharge port is arranged on the rotating shaft, a mounting plate is arranged above the sedimentation tank, and a rotating piece is arranged on the mounting plate; the sedimentation tank is provided with a sludge pumping assembly for pumping sludge at the bottom of the sedimentation tank to the separation tank. The rotating shaft is driven to rotate by the rotating piece, the rotating shaft drives the separation assembly to rotate, the separation assembly drives the floating oil layer to rotate, the floating oil layer at the edge is lifted, and the floating oil layer is discharged through the oil discharge port, so that the separation effect of the floating oil layer is improved; meanwhile, the bottom sludge at the bottom is pumped out to the separation tank through the sludge pumping assembly for sludge-water separation treatment; the effects of separating the floating oil in the sedimentation tank and the bottom sludge are achieved, and the treatment effect of the oily sewage is improved.

Description

Technical Field

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

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge or reuse. In the food industry, such as during the processing of braised food, wastewater containing a large amount of oil is generated. In the treatment process of oily wastewater, flocculants need to be added to the settling tank to improve the aggregation and sedimentation effect of impurities in the wastewater.

[0003] However, the addition of flocculants generates a large number of flocs in the wastewater, which either settle at the bottom of the settling tank to form sludge or float to the top to form oil. The long-term retention of these impurities in the settling tank will affect the separation of oil, water, and impurities, ultimately impacting the wastewater treatment effect. Summary of the Invention

[0004] To improve the treatment effect of oily wastewater, this application provides a wastewater treatment system.

[0005] This application provides a wastewater treatment system, which adopts the following technical solution:

[0006] A wastewater treatment system includes a frame, a settling tank, and a separation tank. The separation tank is mounted on the frame. The settling tank is provided with an inlet pipe and an outlet pipe. The side wall of the settling tank has an oil drain port for discharging the upper layer of floating oil. A rotating shaft is vertically mounted above the settling tank. A separation component for discharging the upper layer of floating oil from the oil drain port is mounted on the rotating shaft. A mounting plate is mounted above the settling tank. A rotating component for driving the rotating shaft to rotate is mounted on the mounting plate.

[0007] The settling tank is equipped with a sludge pumping assembly for pumping sludge from the bottom of the settling tank to the separation tank.

[0008] By adopting the above technical solution, oily wastewater is discharged into a settling tank through an inlet pipe. After adding flocculant into the settling tank, some impurities settle to form bottom sludge, while some float to form floating oil. A rotating component drives a rotating shaft to rotate, which in turn drives a separation component to rotate. The separation component causes the floating oil layer to rotate, raising the edge of the floating oil layer, which is then discharged through the oil outlet, thus improving the separation effect of the floating oil layer. At the same time, a sludge pumping component pumps the bottom sludge to the separation tank for sludge-water separation treatment. This achieves the effect of separating floating oil and bottom sludge in the settling tank, improving the treatment effect of oily wastewater.

[0009] Furthermore, the side wall of the separation tank is provided with several filter holes, the two ends of the separation tank are open, and a movable door for sealing the bottom of the separation tank is provided at the bottom of the separation tank. A pressure plate is slidably arranged inside the separation tank along the axial direction of the separation tank, and a telescopic cylinder for driving the pressure plate to move is provided on the separation tank. A guide rail is horizontally fixed on the frame, and the movable door is slidably arranged on the guide rail.

[0010] By adopting the above technical solution, during the operation of the separation tank, the telescopic cylinder moves downward to drive the pressure plate to move downward, squeezing the sludge in the separation tank. The water in the sludge is discharged through the filter holes, thus achieving the purpose of mud-water separation.

[0011] Furthermore, the separation tank is rotatably mounted on the frame, a gear ring is fixedly sleeved on the separation tank, a power gear is rotatably mounted on the frame, and a drive source for driving the power gear to rotate is provided on the frame.

[0012] By adopting the above technical solution, the drive source drives the power gear to rotate, the power gear drives the gear ring to rotate, and the gear ring drives the separation tank to rotate, so that the sludge in the separation tank rotates. Under the action of centrifugal force, the mud-water separation effect of the sludge in the separation tank is increased.

[0013] Furthermore, an installation ring is fixedly installed on the frame above the separation tank, and a scraper is provided inside the separation tank for abutting against the inner wall of the separation tank. The scraper extends along the axial direction of the separation tank and is fixedly connected to the installation ring.

[0014] By adopting the above technical solution, since the scraper position is fixed, during the rotation of the separation tank, the scraper plays the role of scraping off the sludge adhering to the inner wall of the separation tank and cleaning the sludge clogging the filter holes, effectively preventing the filter holes from clogging, facilitating the smooth passage of sewage through the filter holes, and improving the sludge-water separation effect.

[0015] Furthermore, the separator is fitted with a water collection cylinder for collecting wastewater discharged from the filter holes. The bottom of the water collection cylinder is connected to a collection pipe, and the output end of the collection pipe is connected to the settling tank.

[0016] By adopting the above technical solution, since the sewage in the sludge contains a large amount of carbon source, the separated sewage is fed back into the settling tank through the water collection cylinder and collection pipe, which serves to replenish the carbon source in the settling tank, promote the rapid reproduction of denitrifying bacteria, improve the microbial purification capacity, and save the cost of additional carbon source replenishment.

[0017] Furthermore, the separation assembly includes a separation disk and separation blades. The separation disk is fixedly mounted on the rotating shaft, and the separation blades are fixedly mounted on the separation disk. Multiple separation blades are arranged at intervals.

[0018] Furthermore, the sidewall of the separation disk is conical, and the cross-sectional area of ​​the separation disk gradually decreases from top to bottom.

[0019] Furthermore, the side wall of the settling tank is slidably provided with an adjusting plate for opening and closing the oil drain port in the vertical direction, and the settling tank is provided with a driving component for driving the adjusting plate to move up and down.

[0020] By adopting the above technical solution, if the liquid level in the settling tank is different and the thickness of the floating oil layer is different, then the height position of the floating oil layer will also be different. By driving the adjusting plate to move up and down, the height position of the adjusting plate can be adjusted to adapt to different liquid levels and different thicknesses of floating oil layers. During the process of discharging the floating oil layer, the height of the adjusting plate can be lowered accordingly to facilitate the discharge of the floating oil layer.

[0021] Furthermore, the settling tank is equipped with a drive source for driving the mounting plate to rise and fall.

[0022] Furthermore, the processing system also includes a sludge tank and a conveying assembly. The oil outlet is connected to the sludge tank, the output end of the sludge pumping assembly is connected to the sludge tank, and the conveying assembly is used to convey the sludge in the sludge tank to the separation tank.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Oily wastewater is discharged into a settling tank through an inlet pipe. After flocculant is added to the settling tank, some impurities settle to form bottom sludge, while some float to form oil. A rotating component drives a shaft to rotate, which in turn drives a separation assembly to rotate. The separation assembly causes the oil layer to rotate, raising the oil layer at the edges and discharging it through the oil outlet, thus improving the oil separation effect. At the same time, a sludge pumping assembly pumps the bottom sludge to the separation tank for mud-water separation treatment. This achieves the effect of separating oil and bottom sludge in the settling tank, improving the treatment effect of oily wastewater.

[0025] 2. Because the scraper is in a fixed position, during the rotation of the separation tank, the scraper removes the sludge adhering to the inner wall of the separation tank and cleans the sludge clogging the filter holes, effectively preventing the filter holes from becoming clogged and allowing wastewater to pass through the filter holes smoothly, thus improving the sludge-water separation effect.

[0026] 3. Because the wastewater in the sludge contains a large amount of carbon source, the separated wastewater is fed back into the settling tank through the water collection cylinder and collection pipe, which serves to replenish the carbon source in the settling tank, promote the rapid reproduction of denitrifying bacteria, improve the microbial purification capacity, and save the cost of additional carbon source replenishment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0028] Figure 2 This is a cross-sectional view of the settling tank in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram illustrating the structure of the conveying component, which is the main feature of this application.

[0030] Figure 4 This is a schematic diagram illustrating the structure of the separation tank, which is the main embodiment of this application.

[0031] Figure 5 This is a cross-sectional view of the separation tank in an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Guide rail; 12. Horizontal cylinder; 13. Mounting ring; 2. Settling tank; 21. Water inlet pipe; 23. Oil outlet; 24. Bracket; 241. First cylinder; 25. Mounting plate; 251. First motor; 252. Rotating shaft; 26. Adjusting plate; 27. Second cylinder; 3. Separating tank; 31. Filter hole; 32. Scraper; 33. Water collection cylinder; 331. Collection pipe; 3311. Water pump; 34. Gear 4. Ring; 5. Separation assembly; 6. Separation disc; 7. Separation blade; 8. Sludge pumping assembly; 9. Sludge pump; 10. Sludge tank; 11. Conveying assembly; 12. Spiral blade; 13. Conveying pipe; 24. Corrugated pipe; 15. Adjusting cylinder; 26. Third motor; 37. Fixing frame; 18. Telescopic cylinder; 19. Pressure plate; 20. Movable door; 21. Sliding block; 22. Second motor; 33. Power gear. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a wastewater treatment system.

[0035] Reference Figure 1 and Figure 2 A wastewater treatment system includes a frame 1, a settling tank 2, and a separation tank 3. The separation tank 3 is mounted on the frame 1. The settling tank 2 is equipped with an inlet pipe 21 and an outlet pipe. Wastewater enters the settling tank 2 through the inlet pipe 21. Both the separation tank 3 and the settling tank 2 are cylindrical structures. The side wall of the settling tank 2 is provided with an oil drain port 23 for discharging the upper layer of floating oil. The outlet pipe is located below the oil drain port 23.

[0036] Reference Figure 2A rotating shaft 252 is vertically installed above the settling tank 2. A separation assembly 4 is mounted on the rotating shaft 252 to discharge the upper layer of floating oil from the oil outlet 23. The separation assembly 4 includes a separation disc 41 and separation blades 42. The separation disc 41 is fixedly mounted on the rotating shaft 252, and the separation blades 42 are fixedly mounted on the separation disc 41. Multiple separation blades 42 are spaced apart. The sidewall of the separation disc 41 is conical, and the cross-sectional area of ​​the separation disc 41 gradually decreases from top to bottom.

[0037] Reference Figure 2 A bracket 24 and a mounting plate 25 are provided above the settling tank 2. A rotating component for driving the rotating shaft 252 to rotate is provided on the mounting plate 25. The rotating component includes a first motor 251. The rotating shaft 252 is vertically rotatably inserted into the mounting plate 25. The first motor 251 is fixedly installed on the mounting plate 25. The output shaft of the first motor 251 is fixedly connected to the rotating shaft 252.

[0038] Reference Figure 2 The settling tank 2 is equipped with a drive source for driving the mounting plate 25 to rise and fall. The drive source is a first cylinder 241, which is vertically fixed on the bracket 24. The piston rod of the first cylinder 241 is fixedly connected to the mounting plate 25.

[0039] Reference Figure 2 The side wall of the settling tank 2 is slidably provided with an adjusting plate 26 for opening and closing the oil drain port 23. The adjusting plate 26 is an arc-shaped plate that fits against the side wall of the settling tank 2. The settling tank 2 is provided with a driving component for driving the adjusting plate 26 to move up and down. The driving component is a second cylinder 27. The second cylinder 27 is vertically fixed on the side wall of the settling tank 2, and the piston rod of the second cylinder 27 is fixedly connected to the adjusting plate 26.

[0040] If the liquid level and the thickness of the floating oil layer in the settling tank 2 are different, then the height of the floating oil layer will also be different. The adjusting plate 26 is driven up and down by the driving component to adjust the height of the adjusting plate 26, thereby adapting to different liquid levels and different thicknesses of floating oil layers. During the process of discharging the floating oil layer, the height of the adjusting plate 26 can be lowered accordingly to facilitate the discharge of the floating oil layer.

[0041] Reference Figure 1 and Figure 2The settling tank 2 is equipped with a sludge pumping assembly 5 for pumping the sludge from the bottom of the settling tank 2 to the separation tank 3. The sludge pumping assembly 5 includes a sludge pump 51 and a sludge pumping pipe 52. The processing system also includes a sludge tank 61 and a conveying assembly 62. The oil discharge port 23 is connected to the sludge tank 61, and the output end of the sludge pumping assembly 5 is connected to the sludge tank 61. Specifically, the bottom of the settling tank 2 has an opening, the input end of the sludge pump 51 is connected to the opening, one end of the sludge pumping pipe 52 is connected to the output end of the sludge pump 51, and the other end is connected to the sludge tank 61. The sludge pump 51 pumps the sludge from the bottom of the settling tank 2 into the sludge tank 61.

[0042] Among them, reference Figure 1 and Figure 3 The conveying assembly 62 is used to convey sludge from the sludge tank 61 to the separation tank 3. The conveying assembly 62 is a screw conveyor, including a screw blade 621, a conveying pipe 622, and a third motor 623. The third motor 623 is fixedly installed at one end of the conveying pipe 622. The screw blade 621 rotates and passes through the conveying pipe 622. The output shaft of the third motor 623 is fixedly connected to the screw blade 621. A corrugated pipe 6221 is connected to the output end of the conveying pipe 622. The corrugated pipe 6221 is used to convey sludge to the separation tank 3. The output port of the corrugated pipe 6221 is located directly above the separation tank 3. Furthermore, an adjusting cylinder 6222 is hinged to the conveying pipe 622. The piston rod of the adjusting cylinder 6222 is hinged to the bellows 6221. When it is necessary to convey sludge to the separation tank 3, the adjusting cylinder 6222 drives the bellows 6221 to deflect upward at a certain angle so that the sludge output from the outlet of the bellows 6221 can fall smoothly into the separation tank 3. After the sludge is conveyed, the bellows 6221 is driven to deflect downward to avoid the bellows 6221 interfering with the downward movement of the pressure plate 711.

[0043] Reference Figure 4 and Figure 5 The separator 3 has several filter holes 31 on its side wall. The separator 3 is vertically arranged and has openings at both the top and bottom. A pressure plate 711 is slidably arranged inside the separator 3 along its axial direction. The pressure plate 711 is in contact with the inner wall of the separator 3. A telescopic cylinder 71 is provided on the separator 3 to drive the pressure plate 711 to move. A fixed frame 7 is fixedly arranged on the frame 1. The fixed frame 7 is located above the separator 3. The telescopic cylinder 71 is vertically fixed on the fixed frame 7. The piston rod of the telescopic cylinder 71 is fixedly connected to the pressure plate 711.

[0044] Reference Figure 4 and Figure 5A movable door 8 for sealing the bottom of the separation tank 3 is provided below the tank. A guide rail 11 is horizontally fixed on the frame 1, and the movable door 8 is slidably mounted on the guide rail 11. Specifically, multiple sliders 81 are fixedly provided on the bottom wall of the movable door 8, and each slider 81 has a groove that slides and is slidably connected to the guide rail 11. To facilitate the opening and closing of the movable door 8, a horizontal cylinder 12 is fixedly provided on the frame 1 along the length of the guide rail 11, and the piston rod of the horizontal cylinder 12 is fixedly connected to the movable door 8. After the sludge in the separation tank 3 is compressed and drained of water by the pressure plate 711, the movable door 8 is moved by the horizontal cylinder 12, causing the bottom of the separation tank 3 to open, so that the sludge compressed into blocks can be discharged from the separation tank 3.

[0045] Reference Figure 4 and Figure 5 To improve the sludge-water separation effect, in this application, the separation tank 3 is rotatably mounted on the frame 1, and a gear ring 34 is fixedly sleeved on the separation tank 3. A power gear 91 is rotatably mounted on the frame 1, and a drive source for driving the power gear 91 to rotate is provided on the frame 1. The drive source is a second motor 9, and the output shaft of the second motor 9 is fixedly connected to the power gear 91. The drive source drives the power gear 91 to rotate, the power gear 91 drives the gear ring 34 to rotate, and the gear ring 34 drives the separation tank 3 to rotate, causing the sludge in the separation tank 3 to rotate. Under the action of centrifugal force, the sludge-water separation effect in the separation tank 3 is increased.

[0046] Reference Figure 4 and Figure 5 An installation ring 13 is fixedly installed on the frame 1 and above the separation tank 3. The pressure plate 711 can pass through the installation ring 13. A scraper 32 is provided inside the separation tank 3 for abutting against the inner wall of the separation tank 3. Two scrapers 32 are provided. The scrapers 32 extend along the axial direction of the separation tank 3 and are fixedly connected to the installation ring 13.

[0047] Because the scraper 32 is fixed in position, during the rotation of the separation tank 3, the scraper 32 plays the role of scraping off the sludge adhering to the inner wall of the separation tank 3 and cleaning the sludge blocking the filter hole 31, effectively preventing the filter hole 31 from becoming clogged, facilitating the smooth passage of sewage through the filter hole 31, and improving the sludge-water separation effect.

[0048] Reference Figure 4 and Figure 5 The separator 3 is fitted with a collection cylinder 33 for collecting wastewater discharged from the filter hole 31. A water collection cavity exists between the collection cylinder 33 and the separator 3. The upper and lower ends of the collection cylinder 33 are in sealed contact with the separator 3. The bottom of the collection cylinder 33 is connected to a collection pipe 331. The output end of the collection pipe 331 is connected to the settling tank 2. A water pump 3311 is installed on the collection pipe 331 to pump the wastewater in the collection cylinder 33 into the settling tank 2.

[0049] Because the wastewater in the sludge contains a large amount of carbon source, the separated wastewater is fed back into the settling tank 2 through the water collection cylinder 33 and the collection pipe 331, which serves to replenish the carbon source in the settling tank 2, promote the rapid reproduction of denitrifying bacteria, improve the microbial purification capacity, and save the cost of additional carbon source replenishment.

[0050] The implementation principle of this application embodiment is as follows: oily wastewater is discharged into the settling tank 2 through the inlet pipe 21. After flocculant is added into the settling tank 2, some impurities settle to form bottom sludge, and some float to form floating oil. The rotating shaft 252 is driven to rotate by the rotating component, and the rotating shaft 252 drives the separation component 4 to rotate. The separation component 4 drives the floating oil layer to rotate, so that the floating oil layer at the edge rises and is discharged through the oil outlet 23, thereby improving the separation effect of the floating oil layer. At the same time, the bottom sludge is pumped out to the separation tank 3 by the sludge pumping component 5 for mud-water separation treatment. This achieves the effect of separating floating oil and bottom sludge in the settling tank 2, thereby improving the treatment effect of oily wastewater.

[0051] 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 treatment system, characterized in that: The system includes a frame (1), a settling tank (2), and a separation tank (3). The separation tank (3) is mounted on the frame (1). The settling tank (2) is equipped with an inlet pipe (21) and an outlet pipe. The side wall of the settling tank (2) has an oil outlet (23) for discharging the upper layer of floating oil. A rotating shaft (252) is vertically mounted above the settling tank (2). The rotating shaft (252) is equipped with a separation component (4) for discharging the upper layer of floating oil from the oil outlet (23). A mounting plate (25) is mounted above the settling tank (2). The mounting plate (25) is equipped with a rotating component for driving the rotating shaft (252) to rotate. The settling tank (2) is equipped with a sludge pumping assembly (5) for pumping the sludge at the bottom of the settling tank (2) to the separation tank (3); The side wall of the separation tank (3) is provided with a plurality of filter holes (31). The two ends of the separation tank (3) are open. A movable door (8) for sealing the bottom of the separation tank (3) is provided at the bottom of the separation tank (3). A pressure plate (711) is slidably arranged inside the separation tank (3) along the axial direction of the separation tank (3). A telescopic cylinder (71) for driving the pressure plate (711) to move is provided on the separation tank (3). A guide rail (11) is horizontally fixed on the frame (1). The movable door (8) is slidably arranged on the guide rail (11). The separation tank (3) is rotatably mounted on the frame (1). A gear ring (34) is fixedly sleeved on the separation tank (3). A power gear (91) is rotatably mounted on the frame (1). A drive source for driving the power gear (91) to rotate is provided on the frame (1). The separation tank (3) is covered with a water collection cylinder (33) for collecting sewage discharged from the filter hole (31). The bottom of the water collection cylinder (33) is connected to a collection pipe (331). The output end of the collection pipe (331) is connected to the sedimentation tank (2). The separation component (4) includes a separation disk (41) and separation blades (42). The separation disk (41) is fixedly mounted on the rotating shaft (252), and the separation blades (42) are fixedly mounted on the separation disk (41). Multiple separation blades (42) are spaced apart. The sidewall of the separation disk (41) is a conical surface, and the cross-sectional area of ​​the separation disk (41) gradually decreases from top to bottom.

2. The wastewater treatment system according to claim 1, characterized in that: An mounting ring (13) is fixedly installed on the frame (1) and above the separation tank (3). A scraper (32) for abutting against the inner wall of the separation tank (3) is provided inside the separation tank (3). The scraper (32) extends along the axial direction of the separation tank (3) and is fixedly connected to the mounting ring (13).

3. The wastewater treatment system according to claim 1, characterized in that: The side wall of the settling tank (2) is slidably provided with an adjusting plate (26) for opening and closing the oil drain port (23) in the vertical direction, and the settling tank (2) is provided with a driving component for driving the adjusting plate (26) to move up and down.

4. A wastewater treatment system according to claim 3, characterized in that: The settling tank (2) is equipped with a drive source for driving the mounting plate (25) to rise and fall.

5. A wastewater treatment system according to claim 1, characterized in that: The processing system also includes a sludge tank (61) and a conveying assembly (62). The oil drain (23) is connected to the sludge tank (61), and the output end of the sludge pumping assembly (5) is connected to the sludge tank (61). The conveying assembly (62) is used to convey the sludge in the sludge tank (61) to the separation tank (3).

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