A device for cleaning floating sludge on the surface of a coagulation sedimentation tank

Abstract

The utility model belongs to sewage treatment equipment technical field relates to a coagulation sedimentation tank surface floating sludge cleaning device, including the inside mud blocking mechanism of triangular overflow weir of being located in the four around of sedimentation tank, the skimming mechanism of being suspended in the sedimentation tank and the floating mechanism for providing the buoyancy of skimming mechanism, the skimming mechanism includes the stainless steel box of top opening, the opening of box is located in the liquid level under the sedimentation tank, is equipped with the submersible sewage pump in the box, the output end of submersive sewage pump is connected with the return pipe. The mud blocking mechanism includes the stainless steel enclosure that is fixed a circle around the top of the sedimentation tank, can intercept floating sludge, prevent floating sludge from overflowing with water flow, cause secondary pollution to water body, the skimming mechanism can suck floating sludge into the box through the submersible sewage pump, after stirring, again along the return pipe backflow to the sedimentation tank bottom, thereby prevent sludge loss, ensure the sedimentation effect.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment equipment, and in particular to a device for cleaning floating sludge from the surface of a coagulation sedimentation tank. Background Technology

[0002] In common wastewater treatment systems, wastewater undergoes thorough coagulation in a coagulation tank before entering a sedimentation tank for settling. The resulting sludge settles to the bottom of the tank and is pumped to a screw press for dewatering. The supernatant flows through an overflow weir at the upper edge of the sedimentation tank to the main tailwater tank. During system operation, due to high ambient temperature and long residence time, the sludge at the bottom of the sedimentation tank undergoes anaerobic fermentation, resulting in a large amount of floating sludge on the water surface, severely affecting the effluent parameters of the pretreatment system. Currently, the main method for treating floating sludge is to manually stir it at regular intervals to allow it to settle back to the bottom. However, manual cleaning of floating sludge is labor-intensive, cannot guarantee timeliness, and can only clean sludge near the observation port, resulting in low efficiency. Furthermore, the stirred-up sludge debris is prone to overflowing with the supernatant during cleaning. Therefore, this invention proposes a floating sludge cleaning device for the surface of a coagulation sedimentation tank. Utility Model Content

[0003] The main objective of this invention is to provide a device for cleaning floating sludge from the surface of a coagulation sedimentation tank, in order to solve the problems mentioned in the background art.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: a surface sludge cleaning device for a coagulation sedimentation tank, comprising a sludge-blocking mechanism inside a triangular overflow weir surrounding the sedimentation tank, a skimming mechanism suspended in the sedimentation tank, and a floating mechanism for providing buoyancy to the skimming mechanism. The skimming mechanism includes a stainless steel box with an opening at the top, the opening of which is located below the liquid surface in the sedimentation tank. A submersible pump is installed inside the box, and the output end of the submersible pump is connected to a return pipe.

[0005] Preferably, the sludge-blocking mechanism is a stainless steel mesh fixed around the top of the sedimentation tank, and the triangular overflow weir is provided with a mesh installation groove.

[0006] Preferably, the mesh size of the enclosure is 3×3 mm.

[0007] Preferably, the top of the enclosure net is at least 50 mm higher than the top of the overflow weir.

[0008] Preferably, the floating mechanism includes floats located at the four corners of the housing, vertical guide rods at each of the four corners of the housing, guide holes on the floats, the floats being fitted onto the guide rods, and an adjustment mechanism connected to the floats for adjusting their position on the guide rods.

[0009] Preferably, the adjusting mechanism includes a connecting block disposed at the top of the float, the connecting block having a through hole for a guide rod to pass through, the guide rod having a first rack vertically disposed thereon, the connecting block having an inner cavity, a gear rotatably disposed within the inner cavity, one side of the gear extending from the opening and meshing with the first rack, a slider being slidably connected within the inner cavity to the other side of the gear via a slide rail parallel to the gear axis, one end of the slider extending through the outside of the connecting block, and a spring connecting the other end of the slider to the inner wall of the inner cavity, the slider having a limiting tooth meshing with the gear on the side facing the gear, and a gear clearance notch on the side of the limiting tooth away from the spring.

[0010] The beneficial effects of this utility model are as follows: the sludge interception mechanism includes a stainless steel mesh fixed around the top of the sedimentation tank, which can intercept floating sludge and prevent it from overflowing with the water flow and causing secondary pollution to the water body. The skimming mechanism can suck the floating sludge into the tank through the submersible pump, stir it up, and then return it to the bottom of the sedimentation tank along the return pipe, thereby preventing sludge loss and ensuring the sedimentation effect. Attached Figure Description

[0011] Fig. 1 This is a schematic diagram of the structure of the surface sludge removal device for a coagulation sedimentation tank, as shown in the embodiment.

[0012] Fig. 2 This is a schematic diagram of the box structure.

[0013] Fig. 3 This is a schematic diagram of the adjustment mechanism.

[0014] The numbers in the diagram represent: 1. Sedimentation tank; 2. Overflow weir; 3. Sludge trapping mechanism; 4. Skimming mechanism; 5. Floating mechanism; 6. Tank; 7. Submersible pump; 8. Return pipe; 9. Enclosure net; 10. Float; 11. Guide rod; 12. Connecting block; 13. Through hole; 14. First rack; 15. Inner cavity; 16. Gear; 17. Adjustment mechanism; 18. Sliding block; 19. Limiting tooth; 20. Spring; 21. Gear clearance notch; 22. Tailwater collection tank; 23. Coagulation tank; 24. Flocculation tank; 25. Slow mixing tank; 26. Inlet pump; 27. Low level monitor; 28. High level monitor; 29. ​​Self-protecting level monitor. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments.

[0016] Example: like Figs. 1-3As shown, this utility model discloses a surface sludge removal device for a coagulation sedimentation tank, comprising a sludge-blocking mechanism 3 inside a triangular overflow weir 2 surrounding the sedimentation tank 1, a skimming mechanism 4 suspended within the sedimentation tank 1, and a floating mechanism 5 providing buoyancy for the skimming mechanism 4. The skimming mechanism 4 includes a stainless steel box 6 with an open top, the opening of which is located below the liquid surface in the sedimentation tank 1. A submersible pump 7 is installed inside the box 6, and the output end of the submersible pump 7 is connected to a return pipe 8. The sludge-blocking mechanism 3 can remove floating sludge from the sedimentation tank. The floating sludge on the inner surface of pool 1 is intercepted to prevent it from flowing out through the overflow weir 2. The submersible sludge pump 7 is started. The submersible sludge pump 7 is located inside the tank 6, and the opening of the tank 6 is below the liquid surface, thereby forming a vortex above the tank 6. The floating sludge on the water surface is sucked into the tank 6. The submersible sludge is dispersed by the submersible sludge pump 7 and then flows back to the bottom of the sedimentation tank 1 through the return pipe 8. This not only prevents the floating sludge from overflowing the sedimentation tank 1 and causing secondary pollution to the water, but also sends the floating sludge back to the bottom of the sedimentation tank 1 to prevent sludge loss.

[0017] The sludge-blocking mechanism 3 is a stainless steel mesh 9 fixed around the top of the sedimentation tank 1, and the triangular overflow weir 2 is provided with a mesh installation groove.

[0018] The mesh size of the enclosure net 9 is 3×3 mm.

[0019] The top of the enclosure net 9 is at least 50 mm higher than the top of the overflow weir 2 to prevent floating mud from overturning.

[0020] The floating mechanism 5 includes floats 10 located at the four corners of the box body 6. Vertical guide rods 11 are provided at each of the four corners of the box body 6. The floats 10 are provided with guide holes and are fitted onto the guide rods. An adjustment mechanism 17 is connected to the floats 10 to adjust their position on the guide rods 11, thereby adjusting the position of the opening of the box body 6 below the water surface to accommodate floating mud particles of different sizes.

[0021] The adjusting mechanism includes a connecting block 12 located at the top of the float 10. The connecting block 12 has a through hole 13 for a guide rod 11 to pass through. A first rack 14 is vertically mounted on the guide rod 11. The connecting block 12 has an inner cavity 15, within which a gear 16 is rotatably mounted. The gear 16 meshes with the first rack 14. A slider 18 is slidably connected to the inner cavity 15 on the other side of the gear 16 via a slide rail parallel to the axial direction of the gear 16. One end of the slider 18 extends beyond the connecting block 12, and the other end of the slider 18 is connected to the inner wall of the inner cavity 15 by a spring 20. The side of the slider 18 facing the gear 16 has a spring that interacts with the gear 16. The engaging locking teeth 19 lock the gear 16, thereby fixing the position of the guide rod 11 on the connecting block 12. The side of the locking teeth 19 away from the spring 20 has a gear clearance notch 21. When the position of the float 10 needs to be adjusted, the slider 18 is pushed inward to align the gear clearance notch 21 with the gear 16, thus unlocking the gear 16. The float 10 is then pushed along the guide rod 11 to adjust its position on the guide rod 11. After adjustment, the slider 18 is released, and it resets under the elastic force of the spring 20. The locking teeth 19 engage with the gear 16, thereby fixing the gear 16 and, consequently, the float 10.

[0022] The effluent, within the effluent collection tank 22, is sequentially transported through the inlet pump 26 and pipelines to the coagulation tank 23, flocculation tank 24, and slow mixing tank 25, and then sent to the bottom of the sedimentation tank 1 via the sludge distribution pipe, forming a sludge layer at the bottom of the sedimentation tank 1. The sludge removal device also includes a control terminal (not shown in the figure) for controlling the start and stop of the inlet pump 26 and the submersible sewage pump 7. Two relays are respectively installed in the control circuits of the inlet pump 26 and the submersible sewage pump 7. The normally closed auxiliary contacts of the two relays are connected in series to each other's control circuits, forming an electrical interlock. The sedimentation tank 1 is equipped with a low-level monitor 27, a high-level monitor 28, and a self-protecting level monitor 29. All three monitors are connected to the control terminal. When the liquid level in the sedimentation tank 1... When the liquid level reaches the self-protection level (abnormal liquid level), the self-protection level monitor 29 transmits a signal to the control terminal. The control terminal sends an alarm to the user's mobile phone via a wireless communication module to remind the user to perform maintenance. When the liquid level in the sedimentation tank 1 reaches the low or high level, the control terminal controls the submersible pump 7 to stop and the inlet pump 26 to start, sending the tail liquid after coagulation, flocculation and slow mixing into the sedimentation tank 1. When the liquid level in the sedimentation tank 1 is between the low and high levels, the control terminal controls the submersible pump 7 to run and the inlet pump 26 to stop. The suction generated by the submersible pump 7 forms a vortex on the liquid surface above the tank 6, sucking the floating sludge into the tank 6. The sludge is dispersed by the submersible pump 7 and then flows back to the bottom of the sedimentation tank 1 along the return pipe 8.

[0023] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A device for cleaning floating sludge from the surface of a coagulation sedimentation tank, characterized in that: The system includes a sludge-blocking mechanism located inside a triangular overflow weir surrounding the sedimentation tank, a skimming mechanism suspended within the sedimentation tank, and a floating mechanism for providing buoyancy to the skimming mechanism. The skimming mechanism includes a stainless steel box with an opening at the top, the opening of which is located below the liquid surface in the sedimentation tank. A submersible pump is installed inside the box, and the output end of the submersible pump is connected to a return pipe.

2. The device for cleaning floating sludge from the surface of a coagulation sedimentation tank according to claim 1, characterized in that: The sludge-blocking mechanism is a stainless steel mesh fixed around the top of the sedimentation tank, and the triangular overflow weir is provided with a mesh installation groove.

3. The device for cleaning floating sludge from the surface of a coagulation sedimentation tank according to claim 2, characterized in that: The mesh size of the fence is 3×3 mm.

4. The device for cleaning floating sludge from the surface of a coagulation sedimentation tank according to claim 3, characterized in that: The top of the enclosure net is at least 50 mm higher than the top of the overflow weir.

5. The device for cleaning floating sludge from the surface of a coagulation sedimentation tank according to claim 1, characterized in that: The floating mechanism includes floats located at the four corners of the housing, vertical guide rods at each of the four corners of the housing, guide holes on the floats, the floats being fitted onto the guide rods, and an adjustment mechanism connected to the floats for adjusting their position on the guide rods.

6. The device for cleaning floating sludge from the surface of a coagulation sedimentation tank according to claim 5, characterized in that: The adjusting mechanism includes a connecting block located at the top of the float. The connecting block has a through hole for a guide rod to pass through. A first rack is vertically mounted on the guide rod. The connecting block has an inner cavity, in which a gear is rotatably mounted. One side of the gear extends out from the opening and meshes with the first rack. A slider is slidably connected to the other side of the gear in the inner cavity via a slide rail parallel to the gear's axial direction. One end of the slider extends through the connecting block, and the other end of the slider is connected to the inner wall of the inner cavity by a spring. The side of the slider facing the gear has a limiting tooth that meshes with the gear. The side of the limiting tooth away from the spring has a gear clearance notch.

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