Improved sedimentation tank capable of improving flocculation efficiency

Abstract

The utility model discloses an improved sedimentation tank capable of improving flocculation efficiency, which comprises a sedimentation tank body, and a reaction area and a separation area are sequentially arranged in the sedimentation tank body; the water inlet is formed in the inlet end of the reaction zone; the dosing port is arranged near the water inlet; the fiber ball feeding device is arranged in the reaction zone; the water outlet is formed in the outlet end of the separation area. According to the improved sedimentation tank, the reaction area and the separation area are sequentially arranged in the tank body, so that effective separation in the flocculation and sedimentation process is realized, and the treatment flow is optimized. Through careful design and optimization of each component, an efficient and stable flocculation precipitation system is realized. The system not only is remarkably improved in the aspects of treatment efficiency and effluent quality, but also has obvious advantages in the aspects of operation flexibility, maintenance convenience, environmental protection performance and the like.

Description

Technical Field

[0001] This utility model relates to the field of transformer core detection technology, and in particular to an improved sedimentation tank for improving flocculation efficiency. Background Technology

[0002] In wastewater treatment processes, flocculation sedimentation is the most economical and effective method for treating pollutants such as suspended solids in water. Achieving efficient flocculation sedimentation is an effective way to improve water treatment efficiency and save on infrastructure investment. Currently, the mechanical stirring tank clarification process commonly used in wastewater treatment projects is being adopted less and less due to its complex equipment structure and large infrastructure investment. Other forms of flocculation sedimentation processes often suffer from problems such as large reagent dosages, poor equipment resistance to shock loads, and unsatisfactory treatment effects when treating high-turbidity wastewater.

[0003] For example, the "Sedimentation Tank" disclosed in Chinese patent literature, application number "CN202410150181.X", includes a flocculation tank, a sedimentation tank, and a clear water tank arranged sequentially along the water flow direction. The flocculation tank includes a premixing tank, a first flocculation zone, and a second flocculation zone. The premixing tank is connected to a water supply pipe. The first flocculation zone is connected to both the premixing tank and the second flocculation zone. The second flocculation zone has a first detour channel and a sludge discharge pipe connected to its bottom. The sedimentation tank is connected to the second flocculation zone. The bottom of the sedimentation tank has several sludge troughs. A sludge scraper / suction machine that slides and cooperates with the sludge troughs is slidably connected to the sedimentation tank. The sludge scraper / suction machine is connected to a sludge suction pipe. A water collection trough is erected above the sedimentation tank. The clear water tank is located below the flocculation tank and the sedimentation tank and is connected to the water collection trough. The clear water tank has a second detour channel, and the end of the second detour channel is connected to a drain pipe. This design reduces the floor space required, avoids sludge accumulation in dead zones, and improves sedimentation efficiency and sludge removal effect.

[0004] Although the above scheme employs a two-stage flocculation method, which can improve flocculation and sedimentation efficiency to a certain extent, it still suffers from poor treatment effect when treating high-turbidity wastewater due to the large dosage of reagents. Therefore, this device needs further optimization. Utility Model Content

[0005] Addressing the shortcomings of existing technologies mentioned in the background section, this invention achieves a highly efficient and stable flocculation and sedimentation system through meticulous design and optimization of each component. This system not only significantly improves treatment efficiency and effluent quality but also offers marked advantages in operational flexibility, maintenance convenience, and environmental performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An improved sedimentation tank for enhancing flocculation efficiency includes: a sedimentation tank body, wherein a reaction zone and a separation zone are sequentially arranged within the sedimentation tank body; an inlet located at the entrance end of the reaction zone; a dosing port located near the inlet; a fiber ball dosing device located within the reaction zone; and an outlet located at the outlet end of the separation zone.

[0008] The improved sedimentation tank effectively separates flocculation and sedimentation processes by sequentially setting up reaction and separation zones within the tank, thus optimizing the treatment flow. The inlet is located at the entrance of the reaction zone, ensuring that raw water can quickly enter the reaction area and fully contact the chemicals. The placement of the dosing port close to the inlet allows the flocculant to mix with suspended matter promptly, improving coagulation efficiency. A fiber ball dosing device within the reaction zone provides more aggregates for suspended particles; the high specific surface area of ​​the fiber balls facilitates the capture of small particles and the formation of flocs, enhancing flocculation efficiency. The separation zone allows large flocs to settle fully, and the outlet is located at the exit of the separation zone, ensuring the clarity of the effluent.

[0009] Furthermore, the reaction zone comprises multiple sequentially connected flocculation reaction units, arranged in a stepped manner, with a water level difference of 5-15 cm between adjacent units. The reaction zone consists of multiple sequentially connected flocculation reaction units, arranged in a stepped manner, allowing the potential energy generated by the height difference to be converted into kinetic energy as the water flows through each unit, creating moderate turbulence. This turbulence helps enhance the mixing efficiency of the flocculant and suspended particles in the water, promoting particle collision and aggregation, and forming larger flocs. Simultaneously, controlling the water level difference within the 5-15 cm range ensures moderate turbulence intensity, avoiding excessive shear force that could damage the already formed flocs. Compared to traditional flat-bottomed or single reaction zones, the stepped arrangement of multi-stage reaction units provides a segmented flocculation environment, making the flocculation process more thorough and stable. By optimizing hydraulic conditions and utilizing natural hydraulic gradients, even without additional mechanical stirring equipment, the flocculation effect can be improved, while reducing energy consumption and operating costs.

[0010] Furthermore, guide plates are installed between adjacent flocculation reaction units. These guide plates are inclined at 45°-60° and have multiple small holes with a diameter of 2-5 mm. The inclined guide plates allow for a smooth transition of water flow when entering the next flocculation reaction unit. The 45°-60° inclination angle ensures a moderate water flow velocity, preventing excessive turbulence from damaging the flocs while guaranteeing sufficient mixing. The small holes on the guide plates evenly disperse the water flow, creating fine jets as the water passes through them. This increases the contact opportunity between suspended particles and the flocculant, promoting floc formation and growth. Simultaneously, the 2-5 mm hole size effectively prevents larger flocs from being sheared and damaged.

[0011] Furthermore, a stirring device is installed within the reaction zone. This device includes a stirring shaft and multiple stirring blades mounted on the shaft. The stirring blades are arranged in a spiral pattern with an inclination angle of 30°-45°. The spiral blades generate a combined axial and radial flow during rotation, enhancing the mixing effect between the flocculant and suspended particles in the water. The 30° to 45° inclination angle provides sufficient mixing while avoiding excessive shear force that could damage the formed flocs. Existing sedimentation tanks rely on natural convection or simple guide plates for mixing, but the mechanical stirring device in this solution can precisely control the stirring intensity and flow field distribution, improving the efficiency and stability of the flocculation reaction. Especially when treating influent with high turbidity or significant water quality variations, mechanical stirring ensures that the flocculation effect is not affected, improving the system's adaptability. By optimizing the layout and inclination angle of the stirring blades, energy consumption is reduced, while the amount of flocculant used is decreased, lowering operating costs.

[0012] Furthermore, the stirring device's rotation speed is adjustable, ranging from 20-60 rpm, and the speed of the stirring device at different locations within the reaction zone can be independently controlled. The adjustable speed range of 20-60 rpm, according to flocculation kinetics, promotes floc growth with low-speed stirring and facilitates initial mixing with high-speed stirring. Independent control of the stirring device's speed at different locations allows for optimization at different stages of the flocculation reaction. For example, a higher speed can be used in the initial stage of the reaction to promote rapid dispersion of the flocculant and fiber balls, while the speed can be reduced in the later stages to avoid damaging the already formed flocs. This design significantly improves flocculation efficiency; according to technical specifications, it can increase the proportion of micro-vortices in the reaction zone by at least 30% and shorten the flocculation time to within 30 minutes.

[0013] Furthermore, the separation zone is equipped with inclined plates, which are tilted at 60°-75°, with a spacing of 5-10cm between adjacent inclined plates. The 60°-75° tilt angle is determined based on sedimentation theory and practical production experience. The inclined plates significantly increase the effective sedimentation area, improving the treatment capacity per unit volume. The 5-10cm spacing between adjacent inclined plates ensures sufficient sedimentation space while preventing floc accumulation between the plates. According to sedimentation theory, the inclined plates can shorten the sedimentation distance to 1 / sin θ (where θ is the inclination angle of the inclined plate). Taking a 70° inclination angle as an example, the sedimentation distance can be shortened to approximately 1.06 times the original distance, increasing treatment efficiency by at least 20% while reducing the floor space required. In addition, the inclined plate design facilitates the self-cleaning of flocs. As flocs accumulate to a certain extent on the inclined plate surface, they will automatically slide to the bottom of the tank under gravity, forming a sludge layer.

[0014] Furthermore, the fiber ball dosing device includes a ball storage tank and a dosing pipe connected to the tank. The dosing pipe has a multi-branch structure, distributed at different locations in the reaction zone, with each branch equipped with an independently controlled solenoid valve. This multi-branch structure ensures that the fiber balls are evenly distributed throughout the reaction zone. According to Stokes' law, the settling velocity of flocs is proportional to the square of their diameter. By adding fiber balls at different locations in the reaction zone, the number of floc formation nuclei can be significantly increased, thereby accelerating floc growth. The independently controlled solenoid valve on each branch allows for precise management, enabling adjustments to the fiber ball dosage and frequency based on the hydraulic conditions and water quality characteristics within the reaction zone. This control mechanism allows for dynamic optimization of the flocculation process, theoretically reducing flocculation time to less than 30 minutes while maintaining a fiber ball suspension rate of over 90%. Compared to traditional single-point dosing systems, this design can improve flocculation efficiency by at least 25% and significantly improve effluent quality.

[0015] Furthermore, the storage tank is equipped with a vibration device to prevent fiber ball accumulation. The vibration frequency is adjustable, ranging from 10-30Hz. This vibration device effectively addresses the problem of fiber balls agglomerating and accumulating during storage, significantly improving the uniformity and stability of fiber ball addition. The adjustable vibration frequency range (10-30Hz) is based on the physical characteristics and fluid dynamics principles of the fiber balls, ensuring sufficient dispersion while avoiding damage caused by excessive vibration. This significantly improves the accuracy of fiber ball addition, keeping the addition error within ±5%. Compared to gravity addition or mechanical stirring, vibration addition better maintains the integrity of the fiber balls, extending their service life. In addition, the vibration device prevents scaling on the inner wall of the storage tank, reducing maintenance requirements.

[0016] Furthermore, a partition is provided between the reaction zone and the separation zone. This partition has multiple rows of connecting holes, with the hole diameter decreasing from top to bottom. The uppermost row has holes with a diameter of 10-15 mm, and the lowermost row has holes with a diameter of 3-5 mm. The larger holes at the top of the partition allow larger flocs to pass through smoothly, while the smaller holes at the bottom act as filters, preventing small floc particles from entering the separation zone. This optimizes water flow distribution, reduces short-circuiting, improves floc retention efficiency, reduces hydraulic load fluctuations in the separation zone, and enhances the stability of the sedimentation effect. Since flow rate is proportional to the square of the hole diameter, uniform water flow distribution can be achieved by controlling the hole diameter at different heights. Compared to a single-hole partition, this design better adapts to the separation needs of flocs of different sizes, theoretically increasing the floc retention rate by 15-20%.

[0017] Furthermore, a sludge discharge outlet is provided at the bottom of the separation zone, and this outlet is connected to a sludge recovery system. This system includes a sludge thickening device and a sludge dewatering device. The sludge discharge outlet ensures that the sludge formed after floc settling can be discharged in a timely and effective manner. The connected sludge recovery system, including the sludge thickening and dewatering devices, improves the system's automation level and also realizes the resource utilization of sludge. The sludge thickening process can reduce sludge volume and lower subsequent treatment costs. The dewatering device further reduces the sludge moisture content, facilitating transportation and disposal.

[0018] Therefore, this utility model has the following beneficial effects:

[0019] The multi-stage flocculation reaction tank design and tiered layout improve flocculation efficiency, increasing treatment efficiency by at least 20% compared to a single-stage reaction tank, and shortening flocculation time to within 30 minutes.

[0020] The innovative design of the fiber ball dosing device, combined with a vibration device and a multi-branch dosing tube, increases the proportion of micro-vortices in the reaction zone by at least 30%, accelerating floc formation.

[0021] The optimized mixing device design, including adjustable speed and independent control, improves the contact efficiency between the fiber balls and the wastewater, keeping the fiber ball suspension rate above 90%.

[0022] The inclined plate design in the separation zone increases the effective settling area, improves the unit volume processing capacity, and promotes floc self-cleaning, reducing maintenance costs.

[0023] A complete sludge recycling system is designed, including thickening and dewatering devices, to realize the resource utilization of sludge and improve overall treatment efficiency and environmental performance. Attached Figure Description

[0024] Figure 1 This is a top view of the present invention.

[0025] Figure 2 This is a side sectional view of the present invention.

[0026] In the diagram: 1. Sedimentation tank body; 2. Reaction zone; 3. Separation zone; 4. Inlet; 5. Dosing port; 6. Fiber ball dosing device; 7. Outlet; 8. Flocculation reaction unit; 9. Guide plate; 10. Stirring device; 11. Stirring shaft; 12. Stirring blades; 13. Inclined plate; 14. Ball storage tank; 15. Ball dosing pipe; 16. Solenoid valve; 17. Vibration device; 18. Baffle plate; 20. Sludge discharge port; 21. Sludge recovery system; 22. Sludge thickening device; 23. Sludge dewatering device. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] like Figure 1 , 2 As shown, an improved sedimentation tank for enhancing flocculation efficiency is based on the use of fiber ball technology and a multi-stage flocculation reaction structure. The sedimentation tank body 1 consists of an inlet 4, a chemical dosing port 5, a fiber ball dosing device 6, a reaction zone 2, a separation zone 3, and an outlet 7, all of which are closely connected to form a complete treatment system.

[0030] Inlet 4 is located at the entrance of the reaction zone, adjacent to the dosing port 5, ensuring rapid mixing of wastewater and flocculant. Next is the fiber ball dosing device 6, which includes a ball storage tank 14 and multi-branch dosing pipes 15, distributed at different locations in the reaction zone 2. The ball storage tank 14 is equipped with a vibration device 17 (frequency adjustable, 10-30Hz) to prevent fiber ball accumulation and ensure uniform dosing. Independent solenoid valves 16 on the multi-branch dosing pipes 15 enable precise control, dynamically adjusting the dosing strategy according to water quality characteristics.

[0031] Reaction zone 2 adopts a multi-segment design, including multiple sequentially connected flocculation reaction units 8 arranged in a stepped manner. The water level difference between adjacent units is 5-15cm, promoting water turbulence and increasing the opportunity for floc collision. 45°-60° inclined guide plates 9 are installed between units, with 2-5mm small holes to optimize water flow distribution. Reaction zone 2 also includes a stirring device 10, comprising a stirring shaft 11 and spirally distributed stirring blades 12 (inclination angle 30°-45°). The stirring device 10 has an adjustable speed (20-60rpm), and different positions can be independently controlled to adapt to the needs of different stages of the flocculation process.

[0032] According to Stokes' law, the settling velocity of flocs is proportional to the square of their diameter. Through optimized design, this device significantly increases the number of floc formation nuclei, accelerating floc growth. Theoretically, this design can increase the proportion of micro-vortices in reaction zone 2 by at least 30%, and shorten the flocculation time to less than 30 minutes.

[0033] In this embodiment, a special partition 18 is installed between the reaction zone 2 and the separation zone 3, with multiple rows of connecting holes on top, the hole diameter decreasing from top to bottom (10-15mm for the top row and 3-5mm for the bottom row). This gradient design, based on Darcy's law, achieves uniform water flow distribution and improves floc retention rate by 15-20%. Inclined plates 13 at 60°-75° angles are installed within the separation zone 3, spaced 5-10cm apart. According to sedimentation theory, this design shortens the sedimentation distance to 1 / sin θ (θ being the inclination angle of the inclined plate 13), significantly improving sedimentation efficiency. A sludge discharge port 20 is located at the bottom of the separation zone 3, connected to a sludge recovery system 21, including sludge thickening and dewatering devices. This design not only improves the system's automation level but also realizes sludge resource utilization, and is expected to reduce sludge volume by 60-70%.

[0034] The entire system combines fluid mechanics and flocculation kinetics to achieve a highly efficient flocculation and sedimentation process. Fiber balls increase the number of flocculants, the multi-stage reaction zone 2 optimizes the floc growth environment, and the separation zone 3 ensures efficient solid-liquid separation. This results in significant improvements in treatment efficiency, effluent quality stability, and sludge treatment. This design can shorten floc formation time by 15-20% while maintaining a fiber ball suspension rate of over 90%, greatly improving overall treatment efficiency and environmental performance.

[0035] Specifically, in this embodiment, the inlet 4 of the sedimentation tank is made of 304 stainless steel with an inner diameter of 150mm and a wall thickness of 5mm, ensuring corrosion resistance and structural strength. The dosing port 5, located 50cm downstream of the inlet 4, is made of polytetrafluoroethylene (PTFE) with an inner diameter of 20mm, capable of withstanding strong acid and alkali environments. The fiber ball dosing device 6 consists of a ball storage tank 14 and a multi-branch dosing pipe 15. The ball storage tank 14 is made of high-density polyethylene with a volume of 1m³ and a wall thickness of 10mm, ensuring sufficient strength and sealing. The dosing pipe 15 is made of 304 stainless steel with a diameter of 50mm and a wall thickness of 3mm, with 6-8 branches evenly distributed in different locations in the reaction zone 2. Each branch pipe is equipped with a solenoid valve 16 made of 316L stainless steel, with a fluororubber sealing ring to ensure long-term reliability.

[0036] Reaction zone 2 adopts a multi-segment design, containing 3-5 flocculation reaction units 8. Each unit measures 1m × 1m × 1.5m (length × width × height), is made of fiberglass with an 8mm wall thickness, and possesses good corrosion resistance and strength. The water level difference between adjacent units is 10cm, precisely controlled to ensure an adjustable range of 5-15cm. The guide plates 9 between units are made of 304 stainless steel with a thickness of 3mm, and their tilt angle is adjustable between 45° and 60°. They have 3mm diameter holes spaced 50mm apart. This design ensures both uniform water flow distribution and increases the collision opportunities of flocs.

[0037] The stirring device 10 in reaction zone 2 consists of a stirring shaft 11 and stirring blades 12. The stirring shaft 11 is made of 316L stainless steel, with a diameter of 50mm, and its length is adjusted according to the depth of reaction zone 2. The stirring blades 12 are made of polypropylene, with a thickness of 5mm, a length of 200mm, and a width of 100mm. They are spirally distributed on the stirring shaft 11 with an inclination angle of 35° (adjustable within the range of 30°-45°). The rotational speed of the stirring device 10 can be adjusted within the range of 20-60rpm, and different positions can be independently controlled to adapt to the needs of different stages of the flocculation process.

[0038] The partition 18 between reaction zone 2 and separation zone 3 is made of 304 stainless steel with a thickness of 5mm and has multiple rows of connecting holes. The hole diameter decreases from top to bottom, with the uppermost row having a hole diameter of 12mm and the lowermost row having a hole diameter of 4mm, for a total of 5 rows, with 20 holes in each row. This gradient design, based on Darcy's law, achieves uniform water flow distribution and improves floc retention rate by 15-20%. Separation zone 3 is equipped with inclined plates 13 at a 60°-75° angle, made of PVC with a thickness of 3mm, a length of 1.5m, a width of 1m, and a spacing of 7.5cm (adjustable within the range of 5-10cm). According to sedimentation theory, this design shortens the sedimentation distance to 1 / sin θ (θ being the inclination angle of inclined plate 13), significantly improving sedimentation efficiency.

[0039] The bottom of separation zone 3 is equipped with a sludge discharge port 20, made of 304 stainless steel with an inner diameter of 100mm, which connects to the sludge recovery system. The sludge recovery system includes a sludge thickening device 22 and a sludge dewatering device 23. The sludge thickening device uses gravity thickening, with a thickening tank diameter of 3m and a depth of 4m, constructed of reinforced concrete. The dewatering device uses a belt filter press with a processing capacity of 5-10m³ / h. The filter cloth is made of polyester fiber with a pore size of 0.1mm, enabling the sludge moisture content to be reduced to below 60%.

[0040] Through the optimized design of this embodiment, the sedimentation tank increases the number of floc formation nuclei, accelerating floc growth. According to Stokes' Law, the floc settling velocity is proportional to the square of its diameter. The multi-stage reaction zone 2 design increases the proportion of micro-eddies within the reaction zone 2 by at least 30%, which not only increases the probability and frequency of collisions between colloidal particles but also fully utilizes the high adsorption capacity of the fiber balls, playing a significant adsorption bridging role for fine flocs. The design of the stirring device 10 ensures sufficient contact between the fiber balls and the flocs in the wastewater, while effectively preventing the fiber balls from settling to the bottom, further improving flocculation efficiency.

[0041] The implementation process of this patented solution can be divided into three main stages: device installation, system debugging, and operation and maintenance. First, in the device installation stage, each component must be installed in an orderly manner according to the design drawings. The inlet 4 and dosing port 5 should be fixed at the entrance of reaction zone 2, ensuring a distance of 50cm between them to allow for thorough mixing of wastewater and flocculant. Special attention must be paid to the installation of the fiber ball dosing device 6. The ball storage tank 14 should be placed above reaction zone 2 for gravity dosing. The multi-branch dosing pipes 15 should be evenly distributed in different positions within reaction zone 2, and the solenoid valve 16 on each branch pipe should be individually connected to the control system for precise dosing. When installing the multi-segment structure of reaction zone 2, the water level difference between adjacent units must be precisely controlled, ensuring it remains within an adjustable range of 5-15cm. The installation angle of the guide plate 9 should be adjustable between 45° and 60°, and the drilling of small holes must ensure consistency in diameter and spacing. When installing the stirring device 10, the stirring shaft 11 must be kept vertical, and the spiral distribution and inclination angle of the stirring blades 12 must be strictly fixed according to the design requirements. The installation of the inclined plate 13 in the separation zone 3 also requires precise control of the inclination angle and spacing to ensure the best settlement effect.

[0042] During the system commissioning phase, the fiber ball dosing system needs to be commissioned first, including adjusting the frequency of the vibration device 17 in the ball storage tank 14 (starting from 15Hz and gradually adjusting to the optimal state) and setting the on / off sequence of the solenoid valve 16. Adjusting the speed of the stirring device is another important step, starting from 40rpm and fine-tuning according to the actual flocculation effect. Commissioning the hydraulic conditions of the reaction zone 2 is also crucial, requiring optimization of the water flow distribution by adjusting the angle of the guide plate 9 and the water level difference between adjacent units. The angle and spacing of the inclined plates 13 in the separation zone 3 also need to be fine-tuned based on the actual settling effect. Commissioning of the sludge recovery system includes setting the parameters of the thickening and dewatering devices to ensure optimal sludge treatment results.

[0043] During the operation and maintenance phase, the following aspects need to be focused on: regularly check the fiber ball dosing system to ensure sufficient and uniform fiber ball supply; monitor the suspension rate of fiber balls in reaction zone 2 and maintain it above 90%; regularly clean the inclined plate 13 in separation zone 3 to prevent floc accumulation from affecting sedimentation efficiency; monitor the effluent quality and adjust the flocculant dosage and stirring intensity in a timely manner; regularly check the sludge recovery system to ensure sludge thickening and dewatering effects.

[0044] In practical applications, technicians can further optimize the system. For example, an automatic replenishment device can be added to the fiber ball dosing system to reduce manual operation; an online monitoring system can be introduced to the reaction zone 2 to adjust the stirring intensity and fiber ball dosing amount in real time; the separation zone can be designed with an automatically cleanable inclined plate 13 to extend the maintenance cycle; and intelligent control technology can be introduced into the sludge recovery system to automatically adjust the processing parameters according to the characteristics of the sludge.

[0045] The core of this embodiment lies in utilizing fiber ball technology to improve flocculation efficiency. Since the collision frequency of particles during flocculation is directly proportional to the shear rate, this scheme significantly increases the proportion of micro-vortices through a multi-stage reaction zone 2 and an optimized stirring device design, theoretically increasing the collision frequency by more than 30%. Simultaneously, the introduction of fiber balls provides a large number of flocculants, which lower the energy barrier between particles, promoting the rapid formation and growth of flocs.

[0046] In practical application, this solution is expected to find wide application in multiple fields. In municipal wastewater treatment, it can significantly improve treatment efficiency, reduce land area, and lower operating costs. For industrial wastewater treatment, especially wastewater containing heavy metals or recalcitrant organic matter, the high adsorption capacity of the fiber balls can significantly improve the removal rate. In drinking water purification, this solution can effectively remove fine particles and organic matter from water, improving effluent quality.

[0047] Example 2

[0048] Based on Example 1, Example 2 further optimizes the flocculation and sedimentation device. In this example, an intelligent control system and online monitoring technology are introduced to achieve a more efficient flocculation and sedimentation process. First, multiple online turbidity and pH sensors are added to the reaction zone for real-time monitoring of water quality changes. These sensors are connected to a central control unit, which automatically adjusts the dosage of chemicals and fiber balls using a preset algorithm. Simultaneously, this example improves the fiber ball dosing device by using a pneumatic conveying system instead of gravity dosing, allowing for more precise control of the dosing position and quantity of fiber balls. In the reaction zone, this example introduces a variable frequency stirring device that automatically adjusts the stirring intensity based on online monitoring data to adapt to the optimal flocculation environment under different water quality conditions. Furthermore, this example introduces an inclined plate self-cleaning system in the separation zone to prevent floc accumulation through regular backwashing, extending the maintenance cycle. To further improve treatment efficiency, this example adds a microfiltration membrane unit at the outlet of the separation zone to remove residual fine particles and ensure stable effluent quality. In sludge treatment, this embodiment introduces an intelligent sludge thickening system. By monitoring the sludge moisture content in real time, it automatically adjusts the thickening and dewatering parameters to improve sludge treatment efficiency. These optimization measures not only improve the automation level of the device but also significantly enhance its adaptability and treatment efficiency. Theoretical analysis shows that the intelligent control system can increase flocculation efficiency by 15-20% and improve effluent water quality stability by more than 30%. The pneumatic conveying system can make the fiber balls more evenly distributed, increasing the suspension rate to over 95%. The variable frequency stirring device can precisely control the intensity of micro-eddies, further increasing the collision probability of colloidal particles, theoretically increasing the floc formation rate by 25-30%. The introduction of the microfiltration membrane unit can reduce the effluent turbidity to below 0.5 NTU, meeting stricter discharge standards.

Claims

1. An improved sedimentation tank for improved flocculation efficiency, characterized in that, The utility model relates to a sedimentation tank, which comprises: a sedimentation tank body, a reaction zone and a separation zone being sequentially arranged in the sedimentation tank body; a water inlet arranged at an inlet end of the reaction zone; a dosing port arranged near the water inlet; a fiber ball feeding device arranged in the reaction zone; a water outlet arranged at an outlet end of the separation zone.

2. The improved sedimentation basin according to claim 1, characterized in that, The reaction zone comprises a plurality of sequentially connected flocculation reaction units, each flocculation reaction unit is arranged in a cascade manner, and the water level difference between adjacent flocculation reaction units is 5-15 cm.

3. The improved sedimentation basin according to claim 2, characterized in that, A guide plate is arranged between adjacent flocculation reaction units, the guide plate is arranged at an inclination of 45°-60°, and a plurality of small holes with a diameter of 2-5 mm are formed in the guide plate.

4. The improved sedimentation basin according to claim 1, characterized in that, A stirring device is arranged in the reaction zone, the stirring device comprises a stirring shaft and a plurality of stirring blades arranged on the stirring shaft, the stirring blades are arranged in a spiral manner, and the inclination angle of the stirring blades is 30°-45°.

5. The improved sedimentation basin according to claim 4, characterized in that, The stirring device is adjustable in rotation speed, the rotation speed ranges from 20 rpm to 60 rpm, and the rotation speeds of the stirring devices at different positions in the reaction zone can be independently controlled.

6. The improved sedimentation basin according to claim 1, characterized in that, An inclined plate is arranged in the separation zone, the inclined plate is arranged at an inclination of 60°-75°, and the spacing between adjacent inclined plates is 5-10 cm.

7. The improved sedimentation basin according to any one of claims 1 to 6, characterized in that The fiber ball feeding device comprises a ball storage tank and a ball feeding pipe in communication with the ball storage tank, the ball feeding pipe has a multi-branch structure and is distributed at different positions in the reaction zone, and an electromagnetic valve for independent control is arranged on each branch pipe.

8. The improved sedimentation basin according to claim 7, characterized in that, A vibrating device for preventing fiber ball accumulation is arranged in the ball storage tank, and the vibrating frequency is adjustable and ranges from 10 Hz to 30 Hz.

9. The improved sedimentation basin according to claim 1, characterized in that, A partition plate is arranged between the reaction zone and the separation zone, a plurality of rows of communication holes are formed in the partition plate, the hole diameters of the rows of communication holes decrease from top to bottom, the hole diameter of the uppermost row of communication holes is 10-15 mm, and the hole diameter of the lowermost row of communication holes is 3-5 mm.

10. The improved sedimentation basin according to claim 1, characterized in that, A sludge discharge port is arranged at the bottom of the separation zone, and a sludge recovery system is connected to the sludge discharge port, the system comprises a sludge concentration device and a sludge dewatering device.

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