Flocculation settling tank for industrial wastewater

Abstract

The utility model provides a flocculation settling tank for industrial wastewater, which comprises a flocculation tank, the top of the flocculation tank is sealed through a sealing cover, two sides of the middle of the flocculation tank are respectively connected with a feed pipe and a dosing pipe through pipelines, two sides of the bottom of the flocculation tank are connected with a discharge pipe and a backwashing pipe through pipelines, and the top of the sealing cover is fixedly connected with a driving box. An extrusion assembly is arranged in the flocculation tank, and the extrusion assembly is connected with a driving assembly arranged in the driving box; the stirring assembly comprises a stirring motor, the stirring motor is fixedly connected to the lower end face of the flocculation tank through a mounting base, the output end of the stirring motor is rotationally connected with a rotating shaft, and a stirring plate is fixedly connected to the rotating shaft. According to the utility model, the pressing plate and the extrusion assembly are arranged, and the driving assembly is utilized to accurately control the pressing stroke of the pressing plate, so that the flocculated clear liquid is extruded to rise and separate through the through hole, the flocculated liquid is preliminarily separated, the water content of the floc below is reduced, and the settling speed of the discharged floc is accelerated.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial wastewater flocculation tanks, specifically a flocculation sedimentation tank for industrial wastewater. Background Technology

[0002] Industrial wastewater refers to wastewater containing pollutants such as heavy metals, organic matter, and suspended solids generated during industrial production activities. If discharged directly without treatment, it will not only pollute soil and water bodies and harm the ecological environment, but may also endanger human health through the food chain. Therefore, effective treatment is essential to achieve compliant discharge or recycling. Flocculation and sedimentation, as a key step in industrial wastewater treatment, involves adding flocculants to the wastewater to cause suspended particles to aggregate into flocs, thereby achieving solid-liquid separation.

[0003] After flocculation, the mixed liquid is usually discharged directly into the settling tank for static settling. Due to the high water content and low density of the flocs, the settling speed is slow and the solid-liquid separation efficiency is low. At the same time, prolonged static setting can easily cause the flocs to float or redisperse, further reducing the treatment effect and resulting in low treatment efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a flocculation sedimentation tank for industrial wastewater to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flocculation sedimentation tank for industrial wastewater includes:

[0007] The flocculation tank has a sealed top with a sealing cover. The middle of the flocculation tank is connected to a feed pipe and a dosing pipe on both sides, and the bottom of the flocculation tank is connected to a discharge pipe and a backwash pipe on both sides. A drive box is fixedly connected to the top of the sealing cover. An extrusion assembly is installed inside the flocculation tank. The extrusion assembly is connected to a drive assembly installed in the drive box and is used to adjust the height of the extrusion assembly.

[0008] A stirring assembly includes a stirring motor, which is fixedly connected to the lower end face of the flocculation tank via a mounting base. The output end of the stirring motor is rotatably connected to a rotating shaft, and a stirring plate is fixedly connected to the rotating shaft.

[0009] Preferably, the extrusion assembly includes a pressure plate, and connecting portions are fixedly connected to both sides of the upper end face of the pressure plate, with a rotating portion at the bottom of the semi-threaded rod rotatably connected within the connecting portions.

[0010] Preferably, the outer edge of the pressure plate is fixedly connected with a fitting ring, and the pressure plate has a through hole penetrating the upper and lower parts of the pressure plate.

[0011] Preferably, the lower half of the semi-threaded rod is a smooth slide bar, and the upper half is a threaded screw, with the threaded screw portion rotatably connected to the drive assembly.

[0012] Preferably, the drive assembly includes a driven tooth, the center of which is fixedly connected to an internal threaded ring, which is threadedly engaged with the threaded screw portion on the semi-threaded rod.

[0013] Preferably, the semi-threaded rod passes through the sealing cover and the drive box to reach the top of the drive box, and the driven tooth and the driving tooth mesh with each other.

[0014] Preferably, the center of the active gear is connected to the active shaft, which passes through the drive housing, reaches the top, and is rotatably connected to the output end of the adjustment motor that is fixedly connected to the top of the drive housing.

[0015] Preferably, a limiting ring is fixedly connected to the top of the threaded screw portion of the semi-threaded rod.

[0016] Preferably, the bottom of the flocculation tank is fixedly connected with support legs.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention, by setting up a pressure plate and an extrusion assembly, uses a drive assembly to precisely control the downward stroke of the pressure plate, so that the flocculated clear liquid rises and separates through the through hole under extrusion, thus initially separating the flocculated liquid, reducing the water content of the flocs below, and accelerating the settling speed of the flocs after discharge.

[0019] This invention improves the purity of the clarified liquid separation process by setting a highly elastic silicone rubber bonding ring on the edge of the pressure plate, so that it fits tightly against the inner wall of the flocculation tank when the pressure plate is pressed down, preventing the clarified liquid from leaking from the gap between the pressure plate and the tank wall.

[0020] This invention, by installing a backwash pipe at the bottom of the tank, allows for the reverse spraying of cleaning fluid to flush through-holes and tank wall deposits after the pressure plate descends to a specific position. This can quickly remove blockages, significantly reduce the frequency of manual maintenance, and extend the service life of the equipment.

[0021] This invention, by setting a top sealing cover, facilitates quick disassembly and repair of internal components when the equipment malfunctions. At the same time, the flocculation status inside the tank can be observed in real time through a manhole, greatly improving the ease of operation and maintenance efficiency of the equipment. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a three-dimensional schematic diagram of the internal structure of this utility model;

[0024] Figure 3 This is a three-dimensional schematic diagram of the interior of the drive box of this utility model;

[0025] Figure 4 This is a three-dimensional schematic diagram of the extrusion assembly and agitation assembly of this utility model;

[0026] Figure 5 This is a three-dimensional schematic diagram of the connection between the pressure plate and the semi-threaded rod of this utility model.

[0027] In the diagram: 1. Flocculation tank; 101. Feed pipe; 102. Dosing pipe; 103. Discharge pipe; 104. Backwash pipe; 2. Sealing cover; 3. Support leg; 4. Drive box; 5. Adjusting motor; 6. Semi-threaded rod; 601. Limiting ring; 602. Rotating part; 7. Driving gear; 8. Driven gear; 801. Internal threaded ring; 9. Pressure plate; 901. Connecting part; 902. Fitting ring; 903. Through hole; 10. Stirring motor; 1001. Mounting base; 11. Rotating shaft; 12. Stirring plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1:

[0030] Please see Figures 1 to 5 This utility model provides a technical solution:

[0031] A flocculation sedimentation tank for industrial wastewater, used for flocculation sedimentation of industrial wastewater, comprising:

[0032] The flocculation tank 1 is sealed at the top by a sealing cover 2. The middle two sides of the flocculation tank 1 are respectively connected to a feed pipe 101 and a dosing pipe 102. The bottom two sides of the flocculation tank 1 are connected to a discharge pipe 103 and a backwash pipe 104. The top of the sealing cover 2 is fixedly connected to a drive box 4. The flocculation tank 1 is equipped with an extrusion assembly. The extrusion assembly is connected to a drive assembly in the drive box 4 for adjusting the height of the extrusion assembly.

[0033] The stirring assembly includes a stirring motor 10, which is fixedly connected to the lower end face of the flocculation tank 1 via a mounting base 1001. The output end of the stirring motor 10 is rotatably connected to a rotating shaft 11, and a stirring plate 12 is fixedly connected to the rotating shaft 11.

[0034] Specifically, the extrusion assembly includes a pressure plate 9, with connecting parts 901 fixedly connected to both sides of the upper end face of the pressure plate 9, and a rotating part 602 at the bottom of the semi-threaded rod 6 rotatably connected inside the connecting parts 901.

[0035] Specifically, the outer edge of the pressure plate 9 is fixedly connected with a fitting ring 902, and the pressure plate 9 has a through hole 903 that penetrates the upper and lower surfaces of the pressure plate 9.

[0036] Specifically, the aperture of the through hole 903 in the pressure plate 9 is preferably 0.05 to 0.1 mm, while the minimum particle size of most common flocs is 0.2 mm.

[0037] In this embodiment, the pressure plate 9 has a small through hole 903. When the flocculation work below the pressure plate 9 is completed, the pressure plate 9 can move vertically downward in the tank under the drive of the drive component. The through hole 903 becomes a liquid channel under pressure. The clear liquid rises to the top of the pressure plate 9 through the through hole 903, while the flocs and some unsettled water remain below the pressure plate 9. After the pressure is completed, a water pumping pipe can be connected through the feed pipe 101 and extended to the top of the pressure plate 9 to extract the clear liquid above the pressure plate 9. After extraction, the water pumping pipe is removed, the valve of the discharge pipe 103 is opened, and the flocs and remaining liquid below the pressure plate 9 are discharged to the sedimentation tank for further sedimentation.

[0038] Specifically, during the pressing process of the pressure plate 9, the descent stroke is precisely controlled by the drive assembly, and the top of the semi-threaded rod 6 is fixedly connected to the limiting ring 601 to limit the descent height of the semi-threaded rod 6. This allows the pressure plate 9 to exert a slight squeezing force on the flocculated liquid below, so that the clear liquid above after flocculation can pass through the through hole 903 of the pressure plate 9 without damaging the floc structure or deforming it to pass through the through hole 903, thus ensuring the clarity of the separated liquid.

[0039] The remaining flocs discharged into the sedimentation tank have a significantly increased solid concentration due to the squeezing of some of the clear liquid by the pressure plate 9. This makes it easier for the particles to aggregate into larger flocs. The increased particle size and solid density of the flocs significantly increase the difference between gravity and buoyancy. At the same time, the viscosity of the remaining flocs decreases due to the reduction of water content, thus reducing resistance. Under the combined effect of these multiple factors, the settling speed of the flocs in the sedimentation tank is accelerated, improving the settling efficiency.

[0040] Specifically, the edge of the pressure plate 9 is provided with a fitting ring 902. The fitting ring 902 is preferably made of silicone rubber material with high elasticity and wear resistance. When the pressure plate 9 is pressed down, it fits tightly against the inner wall of the flocculation tank 1 through its own deformation, preventing the clear liquid from passing through the gap between the pressure plate 9 and the edge of the flocculation tank 1 and reaching the top of the pressure plate 9.

[0041] Specifically, the lower half of the semi-threaded rod 6 is a smooth slide bar, and the upper half is a threaded screw, with the threaded screw part rotatably connected to the drive assembly.

[0042] Specifically, a limiting ring 601 is fixedly connected to the top of the threaded screw portion of the semi-threaded rod 6.

[0043] Specifically, the drive assembly includes a driven tooth 8, the center of which is fixedly connected to an internal threaded ring 801, which is threadedly engaged with the threaded screw portion on the semi-threaded rod 6.

[0044] Specifically, the semi-threaded rod 6 passes through the sealing cover 2 and the drive box 4 to reach the top of the drive box 4, and the driven tooth 8 and the driving tooth 7 mesh with each other.

[0045] Specifically, the center of the active gear 7 is connected to the active shaft, which passes through the drive box 4 and reaches the top, where it is rotatably connected to the output end of the adjusting motor 5, which is fixedly connected to the top of the drive box 4.

[0046] In this embodiment, the adjusting motor 5 drives the drive shaft to rotate the drive gear 7. The drive gear 7 meshes with the driven gear 8, causing the driven gear 8 and the central internal thread ring 801 to rotate synchronously. The internal thread ring 801 cooperates with the threaded screw part of the semi-threaded rod 6, converting the rotational motion into the vertical displacement of the semi-threaded rod 6. At this time, the smooth slide bar of the lower half of the semi-threaded rod 6 slides along the guide hole on the sealing cover 2, limiting its radial sway. When the semi-threaded rod 6 rises and falls, the bottom rotating part 602 rotates freely in the connecting part 901 of the pressure plate 9, so that the rotational torque of the semi-threaded rod 6 cannot be transmitted to the pressure plate 9. Only the vertical driving force acts on the pressure plate 9 through the connecting part 901, so that the pressure plate 9 only makes vertical linear motion. Through the precise transmission ratio between the meshing gears and the precise control of the motor, the precise adjustment of the moving distance of the pressure plate 9 is achieved.

[0047] Specifically, the bottom of the flocculation tank 1 is fixedly connected with a support leg 3.

[0048] Example 2:

[0049] This utility model provides a technical solution that is basically the same as that in Embodiment 1, with the following slight differences:

[0050] The flocculation tank 1 is sealed at the top by a sealing cover 2. The middle two sides of the flocculation tank 1 are respectively connected to a feed pipe 101 and a dosing pipe 102. The bottom two sides of the flocculation tank 1 are connected to a discharge pipe 103 and a backwash pipe 104. The top of the sealing cover 2 is fixedly connected to a drive box 4. The flocculation tank 1 is equipped with an extrusion assembly. The extrusion assembly is connected to a drive assembly in the drive box 4 for adjusting the height of the extrusion assembly.

[0051] The stirring assembly includes a stirring motor 10, which is fixedly connected to the lower end face of the flocculation tank 1 via a mounting base 1001. The output end of the stirring motor 10 is rotatably connected to a rotating shaft 11, and a stirring plate 12 is fixedly connected to the rotating shaft 11.

[0052] Specifically, the extrusion assembly includes a pressure plate 9, with connecting parts 901 fixedly connected to both sides of the upper end face of the pressure plate 9, and a rotating part 602 at the bottom of the semi-threaded rod 6 rotatably connected inside the connecting parts 901.

[0053] Specifically, a stepper motor is preferred for the motor, with a pulse control accuracy of up to 0.01mm. It is controlled by a control button. The flocculation tank 1 is preferably equipped with a manhole for observing the internal flocculation state. The connection of the motor and the connection and sealing of the sealing cover 2, the rotating part 602, and the connecting part 901 are common practices and are all conventional methods or common knowledge, so they will not be elaborated here.

[0054] In this embodiment, the through hole 903 of the pressure plate 9 may become clogged after repeated use. After repeated use, the pressure plate 9 is lowered above the stirring assembly by controlling the button, the valves of the feed pipe 101 and the discharge pipe 103 are closed, the valve of the backwash pipe 104 is opened and the high-pressure cleaning fluid is connected. The cleaning fluid enters the bottom of the tank along the backwash pipe 104 and is sprayed upward through the through hole 903 to flush away any flocs that may remain in the through hole 903. The fluid is also reflected by the lower end face of the pressure plate 9 to impact the deposits on the tank wall and the lower surface of the pressure plate 9. The backwashing process lasts for 3-5 minutes, and then the discharge pipe 103 is opened to discharge the fluid.

[0055] In this embodiment, the sealing cover 2 is connected to the flocculation tank 1 by bolts. When the internal extrusion components, stirring components and other structures of the flocculation tank 1 are damaged, the sealing cover 2 can be easily removed for inspection and maintenance. The operator uses a special tool to loosen the bolts on the sealing cover 2 and removes the sealing cover 2 to expose the internal space of the flocculation tank 1 for inspection and repair. After maintenance, the pressure plate 9 is reinstalled, the sealing cover 2 is fixed and the bolts are tightened.

[0056] In use, this invention first injects industrial wastewater and flocculant into the flocculation tank 1 through the feed pipe 101 and the dosing pipe 102. The stirring motor 10 is started to drive the stirring plate 12 to rotate, so that the two are fully mixed and reacted to form flocs. After flocculation is completed, the motor 5 is adjusted to drive the active gear 7 to rotate. Through the driven gear 8 and the internal threaded ring 801, the semi-threaded rod 6 is driven to descend. The pressure plate 9 moves vertically downward and applies a slight squeezing force to the liquid below. At this time, the clear liquid rises through the through hole 903 of the pressure plate 9 to the top of the pressure plate 9, while the flocs remain below the pressure plate 9. Then, the water pump is connected through the feed pipe 101 to remove the clear liquid above the pressure plate 9. Then, the valve of the discharge pipe 103 is opened to discharge the flocs and remaining liquid below the pressure plate 9 to the sedimentation tank for further settling.

[0057] All other parts of this utility model not described herein are the same as existing technology, or are known technology, or can be implemented using existing technology, and will not be described in detail here.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flocculation sedimentation tank for industrial wastewater, characterized by comprising: include: A flocculation tank (1) is sealed at the top by a sealing cover (2). The middle two sides of the flocculation tank (1) are respectively connected to a feed pipe (101) and a dosing pipe (102). The bottom two sides of the flocculation tank (1) are connected to a discharge pipe (103) and a backwash pipe (104). A drive box (4) is fixedly connected to the top of the sealing cover (2). An extrusion assembly is provided inside the flocculation tank (1). The extrusion assembly is connected to a drive assembly provided inside the drive box (4) for adjusting the height of the extrusion assembly. The stirring assembly includes a stirring motor (10), which is fixedly connected to the lower end face of the flocculation tank (1) via a mounting base (1001). The output end of the stirring motor (10) is rotatably connected to a rotating shaft (11), and a stirring plate (12) is fixedly connected to the rotating shaft (11).

2. The flocculating settling tank for industrial wastewater according to claim 1, characterized in that: The extrusion assembly includes a pressure plate (9), and connecting parts (901) are fixedly connected to both sides of the upper end face of the pressure plate (9). The connecting parts (901) are rotatably connected to the rotating part (602) at the bottom of the semi-threaded rod (6).

3. The flocculating settling tank for industrial wastewater according to claim 2, characterized in that: The outer edge of the pressure plate (9) is fixedly connected with a fitting ring (902), and a through hole (903) is provided on the pressure plate (9) through the upper and lower surfaces.

4. The flocculating settling tank for industrial wastewater according to claim 2, characterized by: The lower half of the semi-threaded rod (6) is a smooth slide bar, and the upper half is a threaded screw. The threaded screw part is rotatably connected to the drive assembly.

5. The flocculation sedimentation tank for industrial wastewater according to claim 4, characterized in that: The drive assembly includes a driven tooth (8), the center of which is fixedly connected to an internal threaded ring (801), which is threadedly engaged with the threaded screw portion on the semi-threaded rod (6).

6. The flocculation sedimentation tank for industrial wastewater according to claim 5, characterized in that: The semi-threaded rod (6) passes through the sealing cover (2) and the drive box (4) to reach the top of the drive box (4), and the driven tooth (8) meshes with the driving tooth (7).

7. A flocculation sedimentation tank for industrial wastewater according to claim 6, characterized in that: The center of the active gear (7) is connected to the active shaft, which passes through the drive box (4) and reaches the top, where it is rotatably connected to the output end of the adjustment motor (5) which is fixedly connected to the top of the drive box (4).

8. A flocculation sedimentation tank for industrial wastewater according to claim 4, characterized in that: A limiting ring (601) is fixedly connected to the top of the threaded screw portion of the semi-threaded rod (6).

9. A flocculation sedimentation tank for industrial wastewater according to claim 1, characterized in that: The bottom of the flocculation tank (1) is fixedly connected with support legs (3).

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