Integrated mixing, flocculating and precipitating equipment

Abstract

The utility model provides integrated mixing, flocculating and settling equipment, which belongs to the technical field of feed water treatment equipment, integrates the functions of mixing, flocculating and settling, and comprises a mixing area, a flocculating area, a settling area, a shell, a water inlet pipe, a stirrer and the like. By optimizing the structure and parameters of each treatment area, such as the variable frequency design of the stirrer, the inclination angle of the folded plate, the pipe diameter and inclination angle of the inclined pipe and the like, the mixing, flocculation and precipitation effects are improved, the problems of large occupied area, low efficiency and the like of traditional equipment are solved, efficient and stable water supply treatment is realized, the water supply quality is guaranteed, and the device is suitable for small water supply treatment scenes.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, and in particular to an integrated mixing flocculation sedimentation device suitable for small water treatment plants. Background Technology

[0002] Ensuring a stable and compliant water supply is crucial for the operation of small-scale water treatment plants. However, existing water treatment equipment presents numerous challenges when applied to these plants. Firstly, traditional equipment typically separates mixing, flocculation, and sedimentation processes, resulting in a large footprint. Given the limited space in small-scale plants, this bulky equipment layout severely restricts effective site utilization and increases land costs. For instance, some small town water treatment plants face difficulties in upgrading and expanding their equipment due to the large footprint. Secondly, traditional equipment suffers from low treatment efficiency. Inadequate coordination between treatment stages leads to energy losses and time delays during water transport, impacting overall efficiency. Furthermore, traditional equipment struggles to adapt quickly to fluctuating water volumes, resulting in inconsistent treatment performance and difficulty in consistently meeting effluent quality standards. Moreover, the complex piping of traditional equipment not only increases investment costs but also increases the risk of leaks and blockages, raising maintenance costs and complexity. Furthermore, traditional equipment lacks precise control over chemical dosage, leading to significant waste and increased operating costs. For example, in some small rural water treatment plants, improper chemical dosing not only increases costs but may also negatively impact water quality due to residues. Therefore, developing an integrated mixing, flocculation, and sedimentation equipment for small water treatment plants that is compact, highly efficient, low-cost, and provides stable water quality is urgently needed. Summary of the Invention

[0003] The present invention aims to provide an integrated mixing flocculation sedimentation device to solve the problems of large footprint, low treatment efficiency, high cost and unstable water quality of existing equipment when applied in small water treatment plants, so as to achieve efficient, stable and low-cost operation of small water treatment plants and ensure the safety of water supply quality.

[0004] This utility model patent describes an integrated mixing, flocculation, and sedimentation equipment, which mainly consists of a mixing zone, a flocculation zone, and a sedimentation zone.

[0005] Mixing Zone: Raw water enters the mixing zone through the inlet pipe. The prepared chemicals in the dissolving tank are precisely metered by a metering pump and injected into the mixing zone through the inlet pipe. An agitator is located inside the mixing zone to rapidly mix the raw water and chemicals, ensuring thorough mixing. The agitator is a variable frequency agitator with a speed adjustment range of 50-300 rpm, which can be adjusted according to changes in raw water quality and quantity to ensure uniform mixing of the chemicals and raw water, improving mixing efficiency while avoiding chemical waste. The residence time in the mixing zone is 0.5-2 minutes, and the effective water depth is 0.5-1.0 m. These parameters ensure thorough mixing of the chemicals and raw water, creating favorable conditions for subsequent flocculation reactions.

[0006] Flocculation Zone: The mixed water enters the flocculation zone from the mixing zone. The flocculation zone is divided into three sections: B1, B2, and B3. Baffles are installed within the flocculation zone. The inclination angle of the baffles is 45°-60°, allowing the water to flow meander between the baffles, increasing the chance of collision between particles and promoting the flocculation reaction. This causes the tiny particles in the water to gradually aggregate into larger flocs. The residence time in the flocculation zone is 15-30 minutes, with 5-6 minutes for section B1 and 6-8 minutes for section B2. The flow velocity is 0.25 m / s to 0.35 m / s in section B1, 0.15 m / s to 0.25 m / s in section B2, and preferably 0.10 m / s to 0.15 m / s in section B3. The effective water depth is 1.5-2.0 m. These parameters help to enhance the flocculation effect, reduce flocculation time, and improve treatment efficiency.

[0007] Sedimentation Zone: Flocculated water enters the sedimentation zone through a central pipe with a diameter of 0.2-0.5m. The pipe has a bell-shaped opening at the bottom, with a diameter 1.5-2 times that of the central pipe. Below the bell-shaped opening is a central baffle with a diameter 0.1-0.2m larger than the bell-shaped opening. The bell-shaped opening ensures even water flow, while the central baffle effectively prevents direct impact of the water flow on the sludge layer at the bottom of the sedimentation zone, avoiding re-flooding of the settled sludge and ensuring effective sedimentation. The sedimentation zone has a surface loading rate of 8-12 m³ / (m²・h), an inclined pipe diameter of 25-50 mm, an inclination angle of 60°, and an effective water depth of 3-4 m. These parameters increase the sedimentation area and improve sedimentation efficiency, allowing flocs to quickly settle to the bottom of the sedimentation zone. An outlet channel is located at the top of the sedimentation zone. The settled clear water flows into the outlet channel and is then discharged from the equipment through an outlet pipe. The sedimentation zone is equipped with a sludge hopper at the bottom, with an inclination angle of 50°-60°. The settled sludge is collected in the sludge hopper under gravity and discharged from the equipment through a sludge discharge pipe with a diameter of 0.1-0.2m, effectively avoiding secondary pollution of the water quality by the sludge.

[0008] Metering pump: The metering pump is an adjustable flow metering pump with a flow rate adjustment range of 0.1-5L / min. It can accurately adjust the dosage of the reagent according to the water quality and quantity of the raw water, ensuring the flocculation effect while avoiding reagent waste and reducing operating costs.

[0009] This utility model patent exhibits the following beneficial effects: (1) Compact structure and small footprint: Integrating the three stages of mixing, flocculation and sedimentation into one device greatly reduces the equipment footprint, effectively solves the problem of limited space in small water treatment plants, and reduces land use costs. (2) High treatment efficiency: By optimizing the structure and parameters of each treatment area, such as the variable frequency design of the agitator, the tilt angle of the baffle plate, and the pipe diameter and tilt angle of the inclined pipe, the effects of mixing, flocculation and sedimentation are improved, enabling the equipment to efficiently remove impurities from the water, adapt to the fluctuations in water volume in small water treatment plants, and ensure that the effluent water quality is stable and meets the standards. (3) Low cost: The simplified equipment structure reduces the number of connecting pipes and lowers the equipment investment cost; precise control of reagent dosing avoids reagent waste and reduces operating costs; at the same time, the equipment maintenance difficulty is reduced, reducing maintenance costs. (4) Stable water quality: The integrated design and optimized treatment process reduce interference factors in the treatment process and ensure the stability and safety of the water supply quality. Attached Figure Description

[0010] Figure 1 This is a design drawing of an integrated mixing flocculation and sedimentation equipment;

[0011] In the diagram: A, mixing zone; B, flocculation zone; C, sedimentation zone; B1, first flocculation zone; B2, second flocculation zone; B3, third flocculation zone;

[0012] In the diagram: 1. Outer shell, 2. Inlet pipe, 3. Agitator, 4. Inlet pipe, 5. Metering pump, 6. Dissolving tank, 7. Baffle plate, 8. Central pipe, 9. Bell mouth, 10. Central baffle, 11. Inclined pipe, 12. Outlet channel, 13. Outlet pipe, 14. Mud hopper, 15. Mud discharge pipe. Detailed Implementation

[0013] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0014] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0015] Reference Figure 1The integrated mixing flocculation sedimentation equipment design and installation includes: First, selecting a suitable installation location based on the site conditions and design requirements of the small water treatment plant to ensure stable installation. Then, securely install the outer casing 1, followed by the following components in sequence: inlet pipe 2, agitator 3, chemical inlet pipe 4, metering pump 5, chemical dissolving tank 6, baffle plate 7, central pipe 8, bell mouth 9, central baffle 10, inclined pipe 11, outlet channel 12, outlet pipe 13, sludge hopper 14, and sludge discharge pipe 15. Connect the pipes and lines between each component, ensuring secure and well-sealed connections to prevent leaks and electrical malfunctions, while also facilitating subsequent maintenance and repair.

[0016] Reference Figure 1 The integrated mixing flocculation sedimentation equipment design and commissioning process includes: After installation, commissioning is performed. An appropriate amount of reagent is added to the dissolving tank 6 to prepare a solution of a specific concentration. The metering pump 5 is started, and the flow rate is adjusted to a suitable value to check if the reagent can be normally delivered to the mixing zone A. The stirrer 3 is started, the speed is adjusted, and the stirring effect is observed. An appropriate amount of raw water is introduced into the inlet pipe 2, and the water flow within the equipment is observed. The connectivity between different zones is checked, and the proper functioning of components such as the inclined pipe 11 and the sludge hopper 14 is verified. Based on the commissioning results, necessary adjustments and optimizations are made to ensure the equipment operates normally.

[0017] Reference Figure 1 The integrated mixing flocculation sedimentation equipment design includes the following operation phase: After commissioning, the equipment enters the normal operation stage. Raw water continuously enters the mixing zone A through the inlet pipe 2, where it is fully mixed with the reagent delivered by the metering pump 5 under the action of the agitator 3. The mixed water enters the flocculation zone B, where flocculation occurs under the action of the baffle plate 7. The flocculated water enters the sedimentation zone C through the central pipe 8, where sedimentation and separation occur under the action of the inclined pipe 11. The clear water is discharged through the outlet channel 12 and outlet pipe 13, while the sludge is periodically discharged through the sludge hopper 14 and sludge discharge pipe 15. During operation, operators need to regularly check the operating status of each component of the equipment and adjust the speed of the agitator 3 and the flow rate of the metering pump 5 in a timely manner according to changes in the raw water quality and quantity to ensure stable operation of the equipment and that the effluent water quality meets the standards. At the same time, regular maintenance and upkeep of the equipment are necessary, such as cleaning the inclined pipe 11 and checking for blockages in the sludge hopper 14 and sludge discharge pipe 15, to extend the service life of the equipment.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An integrated mixing, flocculation, and sedimentation device, characterized in that, The system is divided into a mixing zone (A), a flocculation zone (B), and a sedimentation zone (C). The flocculation zone (B) is further divided into three sections: B1, B2, and B3. Specifically, it includes: a shell (1), an inlet pipe (2), a stirrer (3), a chemical inlet pipe (4), a metering pump (5), a dissolving tank (6), a baffle plate (7), a central pipe (8), a bell mouth (9), a central baffle (10), an inclined pipe (11), an outlet channel (12), an outlet pipe (13), a sludge hopper (14), and a sludge discharge pipe (15). The inlet pipe (2) is connected to the mixing zone (A), and the dissolving tank (6) is connected to the mixing zone (A) via the metering pump (5) and the chemical inlet pipe (4). The stirrer (3)... It is set inside the mixing zone (A); the mixing zone (A) is connected to the B1 section of the flocculation zone (B), and the B1 and B2 sections of the flocculation zone (B) are provided with baffles (7); the B3 section of the flocculation zone (B) is connected to the sedimentation zone (C) through the central pipe (8), the bottom of the central pipe (8) is provided with a bell mouth (9), and a central baffle (10) is provided below the bell mouth (9); the sedimentation zone (C) is provided with an inclined pipe (11), the top of the sedimentation zone (C) is provided with a water outlet channel (12), the water outlet channel (12) is connected to the water outlet pipe (13), the bottom of the sedimentation zone (C) is provided with a mud hopper (14), and the mud hopper (14) is connected to the mud discharge pipe (15).

2. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The mixing time in the mixing zone (A) is 0.5-2 min; the flocculation time in the flocculation zone (B) is 15-30 min, the flocculation time in section B1 is 5-6 min, and the flocculation time in section B2 is 6-8 min; the flow velocity in section B1 is 0.25 m / s to 0.35 m / s, the flow velocity in section B2 is 0.15 m / s to 0.25 m / s, and the flow velocity in section B3 is preferably 0.10 m / s to 0.15 m / s; the surface loading of the sedimentation zone (C) is 8-12 m³ / (m²·h).

3. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The stirrer (3) is a variable frequency stirrer with a speed adjustment range of 50-300 r / min.

4. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The tilt angle of the folding plate (7) is 80° to 100°.

5. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The diameter of the inclined tube (11) is 25-50 mm and the inclination angle is 60°.

6. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The metering pump (5) is an adjustable flow metering pump with a flow adjustment range of 0.1-5L / min.

7. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The effective water depth of the A mixing zone is 0.5-1.0m, the effective water depth of the B flocculation zone is 1.5-2.0m, and the effective water depth of the C sedimentation zone is 3-4m.

8. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The diameter of the central tube (8) is 0.2-0.5m, the diameter of the bell mouth (9) is 1.5-2 times the diameter of the central tube (8), and the diameter of the central baffle (10) is 0.1-0.2m larger than the diameter of the bell mouth (9).

9. The integrated mixing flocculation sedimentation equipment according to claim 1, characterized in that, The mud hopper (14) has an inclination angle of 50°-60° and the mud discharge pipe (15) has a diameter of 0.1-0.2m.

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