High-efficiency steady-flow rapid precipitation device

Abstract

The utility model discloses a high-efficiency steady-flow rapid sedimentation device which comprises a tank body, a central transmission shaft, a mud scraping plate and a concentration grid, the tank body is cylindrical, the bottom of the tank body is provided with a sludge collecting tank, the center of the tank body is provided with a central transmission shaft, the central transmission shaft is connected with a sludge scraper, the sludge scraper is matched with the bottom of the tank body, and the upper end of the sludge scraper is provided with a concentration grid; a water inlet groove, a water outlet channel and an overflow weir are arranged at the top of the tank body and are all annular; a water retaining apron board is connected below the water outlet channel; a water distribution hole is formed in the bottom of the water inlet channel; a plurality of steady-flow redirection baffles are arranged in the middle of the inner wall of the tank body; the steady-flow redirection baffle comprises a dense baffle part, a grid baffle part and a one-way hinge, one end of the dense baffle part is connected with the inner wall of the tank body, and the other end of the dense baffle part is connected with the grid baffle part through the one-way hinge. The utility model can realize uniform and stable inflow water flow, can improve the volume utilization rate of the settling area, and shortens the settling time.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a high-efficiency, stable-flow, rapid sedimentation device. Background Art

[0002] Sedimentation tanks are treatment structures that remove suspended particles denser than water from water using gravity settling. They are the most widely used treatment units in wastewater treatment. They include: an influent zone, a sedimentation zone, a buffer zone, a sludge zone, and an effluent zone. The influent zone's function is to ensure a uniform flow of water through the sedimentation tank, thereby avoiding short-circuiting and reducing the adverse effects of turbulence. However, in actual use, suspended particles such as impurities in wastewater are carried by the water flow. When the water flow velocity is uneven or too high, sedimentation becomes difficult. Furthermore, during the influent process, the impact of the water flow against the walls often prevents the flocs on the surface of the sedimentation tank from settling, affecting the effluent quality. Existing sedimentation tanks also frequently encounter problems such as poor sludge discharge, excessively high sludge moisture content, and poor effluent quality.

[0003] Therefore, a new, efficient, and stable-flow rapid sedimentation device needs to be designed. Summary of the Invention

[0004] The purpose of this invention is to provide a highly efficient and stable-flow rapid sedimentation device to solve the problems mentioned in the background art. In practical use, suspended particles such as impurities in wastewater flow with the water flow. When the water flow velocity is uneven or too fast, sedimentation is difficult. Furthermore, during the influent process, the impact of the water flow against the walls often makes it difficult for the flocs on the surface of the sedimentation tank to settle, affecting the effluent quality. In practical applications, existing sedimentation tanks also frequently encounter problems such as poor sludge discharge, excessively high sludge moisture content, and poor effluent quality.

[0005] To achieve the above objectives, this utility model provides a high-efficiency and stable-flow rapid sedimentation device, including a tank body, a central drive shaft, a sludge scraper, and a thickening grid;

[0006] The pool is cylindrical, with a downward-recessed sludge collection trough at the center of the bottom. A central drive shaft is located at the center of the pool, and the lower end of the central drive shaft is connected to a scraper. The scraper is matched with the bottom of the pool, and a thickening grid is connected to the upper end of the scraper.

[0007] The top opening of the pool is equipped with an inlet trough, an outlet channel, and an overflow weir. The inlet trough, outlet channel, and overflow weir are all annular. The outer side of the inlet trough is close to the inner wall of the pool. The outer side of the outlet channel is connected to the inner side of the inlet trough. The overflow weir is located on the inner side of the outlet channel. A cylindrical baffle is connected to the bottom of the outlet channel. The bottom of the inlet trough is equipped with an annular water distribution hole.

[0008] The inner wall of the pool is also equipped with multiple flow-stabilizing and diverting baffles horizontally and evenly arranged in the middle. Each flow-stabilizing and diverting baffle includes a solid baffle section, a mesh baffle section, and a one-way hinge. One end of the solid baffle section is fixedly connected to the inner wall of the pool, and the other end of the solid baffle section away from the inner wall of the pool is connected to the mesh baffle section through a one-way hinge, so that the solid baffle section and the mesh baffle section of the same flow-stabilizing and diverting baffle are in the same horizontal plane.

[0009] In one specific embodiment, the high-efficiency and stable rapid sedimentation device further includes a support beam installed on the upper part of the pool body, and the central drive shaft, mud level monitor, effluent channel, and overflow weir are all installed on the support beam.

[0010] In one specific embodiment, one end of the dense baffle portion of the flow stabilizing and redirecting baffle is fixedly connected to the inner wall of the pool by welding.

[0011] In one specific implementation, all the flow stabilization and diversion baffles are divided into 8 groups, with one group of flow stabilization and diversion baffles connected and installed at 45° intervals around the inner wall of the pool.

[0012] In one specific implementation, each group of flow stabilization and diversion baffles includes 6 to 10 flow stabilization and diversion baffles evenly spaced from top to bottom, and the number of flow stabilization and diversion baffles in each group is the same, and the horizontal height of the flow stabilization and diversion baffles at corresponding positions from top to bottom in each group is the same.

[0013] In one specific implementation, the distance between adjacent vertical flow-regulating and diverting baffles in each group of flow-regulating and diverting baffles is greater than the width of the grid baffle section.

[0014] In one specific embodiment, a reflux port is provided at the lower part of the side wall of the pool, and the horizontal position of the reflux port is 0.4 to 0.6 meters higher than the upper end of the concentration grid.

[0015] In one specific embodiment, a mud level monitor is also provided on the pool body. The mud level monitor is located next to the central drive shaft and is used to monitor the mud level in the pool body.

[0016] In one specific implementation, a reflux pump is also provided outside the reflux port. The inlet end of the reflux pump is connected to the reflux port, and the outlet end of the reflux pump is connected to the inlet tank.

[0017] In one specific embodiment, the high-efficiency, stable-flow rapid sedimentation device further includes a drive motor, with the upper end of the central transmission shaft connected to the drive motor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention can achieve uniform and stable influent water flow, improve sedimentation, increase the volume utilization rate of the sedimentation zone, and shorten the sedimentation time.

[0020] The circular inlet and outlet design of this invention reduces short-circuiting and turbulence in the water flow. Even with large fluctuations in the treated water volume, it effectively controls the flow velocity and direction of the sedimentation tank to ensure stable treatment results, thereby improving the volume utilization rate of the sedimentation zone and shortening the settling time. The design of a set of flow-stabilizing and diverting baffles connected at 45° intervals around the inner wall of the tank further allows the flocs generated by coagulation and flocculation in the water to settle sufficiently within the tank, thus reducing settling time. A return port with a sludge level monitor is designed at the lower part of the tank side wall. When the sludge at the bottom of the sedimentation reaction reaches a certain height above the thickening grid, the return port is opened to allow the clear liquid on the sludge surface to flow back to the inlet. When the sludge level drops to a certain height, the return port closes, and the remaining sludge at the bottom of the tank is further compressed. Part of the thickened sludge is returned, and the other part is discharged as surplus sludge.

[0021] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0023] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a flow-stabilizing and redirecting baffle according to an embodiment of the present invention;

[0025] Figure 3 This is a top view schematic diagram of one embodiment of the present invention;

[0026] Figure 4 This is a top view of the middle cross section of one embodiment of the present invention;

[0027] Among them, 01, central drive shaft; 02, water inlet trough; 03, water distribution hole; 04, flow stabilizing and diverting baffle; 05, water-blocking skirt; 06, thickening grid; 07, sludge collection trough; 08, sludge scraper; 09, water outlet channel; 10, overflow weir; 11, return port; 12, sludge level monitor. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0029] Example 1

[0030] This utility model provides a high-efficiency, stable-flow rapid sedimentation device, including a tank body, a central drive shaft 01, a sludge scraper 08, and a thickening grid 06; the high-efficiency, stable-flow rapid sedimentation device in this embodiment is designed to produce 4800 tons / day of water, the tank body is cylindrical, the diameter of the inner wall of the tank body is 4 meters, and the height of the inner wall of the tank body is 2.25 meters.

[0031] A central drive shaft 01 is located at the center of the pool. The lower end of the central drive shaft is connected to a sludge scraper 08. The sludge scraper 08 is matched with the bottom of the pool. A thickening grid 06 is connected to the upper end of the sludge scraper.

[0032] The thickening grid 06 and scraper 08 at the bottom of the device rotate slowly under the drive of the central drive shaft 01. The tiny vortices formed behind each grid bar further promote the flocculation between particles. These vortices not only help the particles aggregate, but also create a cavitation effect, causing pore water and air bubbles in the sludge particles to escape, thereby improving the density and settling performance of the sludge.

[0033] The top opening of the pool body is equipped with an inlet trough 02, an outlet channel 09, and an overflow weir 10. The inlet trough 02, the outlet channel 09, and the overflow weir 10 are all annular. The outer side of the inlet trough 02 is close to the inner wall of the pool body, the outer side wall of the outlet channel 09 is connected to the inner side wall of the inlet trough 02, and the overflow weir 10 is located on the inner side of the outlet channel 09. A cylindrical baffle skirt 05 is connected to the bottom of the outlet channel 09, and an annular water distribution hole 03 is provided at the bottom of the inlet trough 02. Wastewater first enters the inlet trough from the external pipe, and then enters the interior of the pool body from the water distribution hole.

[0034] The water-blocking skirt 05 causes wastewater to flow downwards after entering the pool, and then circle around to the middle of the pool.

[0035] The inner wall of the pool is also horizontally and evenly provided with multiple flow-stabilizing and diverting baffles 04. The flow-stabilizing and diverting baffles 04 include a solid baffle part, a grid baffle part and a one-way hinge. One end of the solid baffle part is fixedly connected to the inner wall of the pool, and the other end of the solid baffle part away from the inner wall of the pool is connected to the grid baffle part through the one-way hinge, so that the solid baffle part and the grid baffle part of the same flow-stabilizing and diverting baffle are in the same horizontal plane.

[0036] The high-efficiency, stable-flow rapid sedimentation device also includes a support beam installed on the upper part of the pool body. The central drive shaft 01, mud level monitor 12, outlet channel 09, and overflow weir 10 are all installed on the support beam.

[0037] One end of the dense baffle portion of the flow stabilizing and diverting baffle 04 is fixedly connected to the inner wall of the pool by welding.

[0038] All flow stabilization and diversion baffles 04 are divided into 8 groups, with one group of flow stabilization and diversion baffles 04 connected and installed at 45° intervals around the inner wall of the pool.

[0039] Each group of flow stabilizing and redirecting baffles 04 includes 6 to 10 flow stabilizing and redirecting baffles 04 evenly distributed from top to bottom, and the number of flow stabilizing and redirecting baffles in each group is the same, and the horizontal height of the flow stabilizing and redirecting baffles at corresponding positions from top to bottom in each group is the same.

[0040] The distance between adjacent vertical flow-regulating and redirecting baffles in each group is greater than the width of the grid baffle section. Furthermore, the distance between adjacent vertical flow-regulating and redirecting baffles in each group is less than 1.5 times the length of the grid baffle section.

[0041] The other end of the dense baffle section, away from the inner wall of the pool, is connected to the mesh baffle section via two resilient one-way hinges.

[0042] As water flows down from all sides, the mesh baffle tilts downwards due to the impact of the water flow. When the water flow rate stabilizes, the mesh baffle bounces back to a horizontal position under the action of the one-way hinge.

[0043] Preferably, a total of 64 flow-stabilizing and diverting baffles are installed on the inner wall of the pool, distributed in 8 layers, with 8 flow-stabilizing and diverting baffles evenly arranged along the inner wall of the pool in each layer. The spacing between the flow-stabilizing and diverting baffles in adjacent layers is 0.2 meters.

[0044] The flow stabilizing and redirecting baffle is rectangular, with a width of 0.25 meters for the dense baffle section and 0.25 meters for the mesh baffle section. The length of the flow stabilizing and redirecting baffle is 1.1 meters, the thickness is 4 centimeters, and the material is stainless steel.

[0045] The mesh baffle section is grid-shaped, with a 5mm thick stainless steel mesh inside. The center of the mesh baffle section has 352 perforations, each 2.5cm long and 2cm wide, and each end of the length section has 8 perforations, each 2.5cm long and 5cm wide, reducing the impact of incoming water quality and impurities. The internal stainless steel thickness of the mesh baffle section is 5mm.

[0046] Wastewater enters the cylinder from all sides through the water distribution holes 03. When the water flow velocity is too high, the eight sets of eight-layer deflecting baffles inside will consume potential energy layer by layer to make the flow velocity reach a uniform and stable state. When the inflow velocity is too fast, the mesh baffle will tilt downward under the impact of the water flow. Part of the water flow passes through the mesh and continues to flow to the second layer of baffle, penetrating layer by layer downward, or being impacted by the dense baffle and changing its flow direction. Part of the water flow is blocked by the dense baffle and flows towards the center of the tank. When the high-speed water flow... After passing through the first, second, third, fourth, fifth, sixth, seventh, and eighth layers of flow stabilizing and redirecting baffles in sequence, the potential energy and impact generated by the water flow velocity have been largely consumed. Furthermore, the incoming water flow reaches the center of the sedimentation tank under the action of the dense baffle section. The continuous rotation of the central drive shaft further drives the water flow inside the tank to converge towards the center. When the influent flow rate is slow and relatively uniform, the resilient one-way hinges inside the flow-stabilizing and redirecting baffles cause each layer of baffles to spring back and return to parallel with the horizontal plane. When the slow influent flow rate is insufficient to impact the baffles and offset their downward potential energy, the water passes through the internal mesh of the baffles and slowly spreads downwards. The dense baffles then play their role, blocking the water flow as it slowly descends and changing its direction. This effectively controls the flow of influent from all sides, directing it towards the center of the tank. This design ensures that wastewater flows into the reaction zone uniformly and stably, avoiding excessively high or low local concentrations that could affect the sedimentation effect. During this process, the annular water flow formed inside the device facilitates sufficient contact and collision between particles, further enhancing flocculation and growth.

[0047] The lower part of the side wall of the pool is also provided with a return port 11, and the horizontal position of the return port 11 is 0.4 to 0.6 meters higher than the upper end of the concentration grid 06, preferably 0.5 meters higher.

[0048] A mud level monitor 12 is also installed on the pool body. The mud level monitor 12 is located next to the central drive shaft and is used to monitor the mud level in the pool body.

[0049] A return pump is also installed outside the return port 11. The inlet end of the return pump is connected to the return port 11, and the outlet end of the return pump is connected to the inlet tank. The return pump delivers water from the return port 11 to the inlet tank. The sludge level monitor 12 is associated with the return pump.

[0050] When the sludge level reaches 0.5 meters above the thickening screen, the return port 11 above the thickening screen is opened, and the clear liquid on the sludge surface flows out from the return port 11 and back to the inlet tank. When the sludge level drops to 0.3 meters above the thickening screen, the return port 11 is closed to stop the return. This process further compresses the sludge at the bottom, increasing the sludge concentration and reducing its volume.

[0051] The high-efficiency, stable-flow rapid sedimentation device also includes a drive motor, with the upper end of the central drive shaft 01 connected to the drive motor. The drive motor drives the central drive shaft 01 to rotate, and the drive motor can be mounted on a support beam.

[0052] A recessed sludge collection trough 07 is located at the center of the bottom of the tank. This trough collects the settled sludge and sends it back to the front end of the treatment process or for other treatments via a return system. This reduces sludge discharge and improves treatment efficiency. The clarified wastewater, after sufficient sedimentation, is discharged from the top effluent channel 09. At this point, most of the suspended particles in the wastewater have been removed, and the water quality has been significantly improved.

[0053] The circumferential inlet and outlet design of this utility model, combined with the flow-stabilizing and diverting baffles around the side walls of the tank, can reduce the phenomenon of short-flow and steady flow of wastewater. It can also effectively reduce the impact of potential energy when the water volume fluctuates greatly and change the direction of water inflow so that it converges to the center of the sedimentation tank. The design of the flow-stabilizing and diverting baffles can effectively deal with the wall-collision effect caused by the water flow. When the water flow velocity is too fast, the inner end of the baffle tilts downward under the impact of the water flow to offset the potential energy. The grid design inside the plate can also solve the problem of the upper layer of floc being difficult to settle in the sedimentation tank. Meanwhile, to address the problems of poor sludge discharge, excessive sludge moisture content, and poor effluent quality that frequently occur in the practical application of existing sedimentation tanks, a sludge level monitor is installed at the top of the rapid sedimentation device. When the sludge level reaches a certain height above the thickening grid, the return port is opened, and the supernatant of the sludge layer flows back to the inlet tank. When the sludge level drops to a fixed height, the return port is closed. This process further compresses the bottom sludge, increases the sludge concentration, and reduces the volume, thus solving the problem of excessive sludge moisture content and also playing a certain role in controlling the effluent quality.

[0054] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions and substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A high-efficiency, stable-flow rapid sedimentation device, characterized in that, Includes the pool body, central drive shaft (01), sludge scraper (08), and thickening grid (06); The pool is cylindrical, with a downward-recessed sludge collection trough (07) at the center of the bottom of the pool. A central drive shaft (01) is located at the center of the pool, and the lower end of the central drive shaft is connected to a scraper (08). The scraper (08) matches the bottom of the pool, and a thickening grid (06) is connected to the upper end of the scraper. The top opening of the pool is provided with an inlet trough (02), an outlet channel (09), and an overflow weir (10). The inlet trough (02), the outlet channel (09), and the overflow weir (10) are all annular. The outer side of the inlet trough (02) is close to the inner wall of the pool. The outer side of the outlet channel (09) is connected to the inner side of the inlet trough (02). The overflow weir (10) is located inside the outlet channel (09). A cylindrical baffle skirt (05) is connected to the bottom of the outlet channel (09). An annular water distribution hole (03) is provided at the bottom of the inlet trough (02). Multiple flow-stabilizing and diverting baffles (04) are horizontally and evenly arranged in the middle of the inner wall of the pool. The flow-stabilizing and diverting baffle (04) includes a solid baffle part, a grid baffle part and a one-way hinge. One end of the solid baffle part is fixedly connected to the inner wall of the pool, and the other end of the solid baffle part away from the inner wall of the pool is connected to the grid baffle part through the one-way hinge, so that the solid baffle part and the grid baffle part of the same flow-stabilizing and diverting baffle are in the same horizontal plane.

2. The high-efficiency, stable-flow rapid sedimentation device according to claim 1, characterized in that, The high-efficiency and stable rapid sedimentation device also includes a support beam set on the upper part of the pool body, and the central drive shaft (01), mud level monitor (12), water outlet channel (09) and overflow weir (10) are all set on the support beam.

3. The high-efficiency, stable-flow rapid sedimentation device according to claim 1, characterized in that, One end of the dense baffle portion of the flow stabilizing and diverting baffle (04) is fixedly connected to the inner wall of the pool by welding.

4. The high-efficiency, stable-flow rapid sedimentation device according to claim 1, characterized in that, All flow stabilization and diversion baffles (04) are divided into 8 groups, with one group of flow stabilization and diversion baffles (04) connected and installed at 45° intervals around the inner wall of the pool.

5. The high-efficiency, stable-flow rapid sedimentation device according to claim 4, characterized in that, Each group of flow diversion baffles (04) includes 6 to 10 flow diversion baffles (04) evenly spaced from top to bottom, and the number of flow diversion baffles in each group is the same. The horizontal height of the flow diversion baffles in each group is the same from top to bottom.

6. The high-efficiency, stable-flow rapid sedimentation device according to claim 5, characterized in that, The distance between adjacent flow-regulating and diverting baffles in each group is greater than the width of the grid baffle section.

7. The high-efficiency, stable-flow rapid sedimentation device according to claim 1, characterized in that, The lower part of the side wall of the pool is also provided with a return port (11), and the horizontal position of the return port (11) is 0.4 to 0.6 meters higher than the upper end of the concentration grid (06).

8. The high-efficiency, stable-flow rapid sedimentation device according to claim 7, characterized in that, A mud level monitor (12) is also installed on the pool body. The mud level monitor (12) is located next to the central drive shaft and is used to monitor the mud level in the pool body.

9. The high-efficiency, stable-flow rapid sedimentation device according to claim 7, characterized in that, A return pump is also installed outside the return port (11). The inlet end of the return pump is connected to the return port (11), and the outlet end of the return pump is connected to the inlet tank.

10. The high-efficiency, stable-flow rapid sedimentation device according to claim 1, characterized in that, The high-efficiency, stable-flow rapid sedimentation device also includes a drive motor, with the upper end of the central drive shaft (01) connected to the drive motor.

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