A vertical flow flocculation sedimentation tank

Abstract

This utility model discloses a vertical flow flocculation sedimentation tank, belonging to the technical field of sedimentation equipment. It includes a tank body with a drain outlet and a valve for controlling its opening and closing at the bottom, and a drain outlet at the top; an inlet pipe with its outlet located in the middle of the tank body and arranged vertically downwards; a skimmer located at the top of the tank body for skimming away foam from the wastewater surface; and a foam collection tank located at the top of the tank body to receive the foam skimmed by the skimmer. This invention solves the problems of poor flocculation sedimentation in traditional wastewater treatment methods, such as floating sludge, turbid effluent, and failure of colloids to aggregate.

Description

Technical Field

[0001] This utility model relates to the field of sedimentation equipment technology, and in particular to a vertical flow flocculation sedimentation tank. Background Technology

[0002] The flocculation and sedimentation effect in wastewater treatment directly affects the effectiveness of subsequent wastewater treatment processes. The main factors influencing flocculation and sedimentation include: water flow direction, sludge and sludge scraping effect, and agitation effect. Currently, the flocculation and sedimentation tanks used in wastewater treatment units have simple structures and unreasonable processes, resulting in poor flocculation and sedimentation effects, such as floating sludge, turbid effluent, and failure of colloids to aggregate. The main reasons for these phenomena are: 1. Insufficient mixing and retention time after the initial wastewater inflow, resulting in a last-in-first-out situation. 2. Insufficient collision and aggregation of colloids formed after chemical addition in the flocculation and sedimentation tank. 3. Gas generation from the fermentation of sludge at the bottom of the wastewater, forming floating sludge and sludge.

[0003] To solve the above problems, the structure of the flocculation sedimentation tank needs to be modified. This can be achieved by addressing the following aspects: 1. Changing the water flow direction from horizontal to vertical, ensuring that the wastewater reaches the bottom of the tank after entering, allowing for thorough mixing; 2. Increasing stirring to ensure the chemicals fully dissolve and diffuse in the wastewater, while also increasing the opportunity for floc aggregation, thus increasing sedimentation volume; 3. Adding a surface scraper to break up and disperse floating sludge and dregs, releasing the trapped gas. With reduced buoyancy, the sludge and dregs will naturally settle to the bottom under gravity. Therefore, it is necessary to invent a vertical flow flocculation sedimentation tank based on the above treatment methods. Summary of the Invention

[0004] The purpose of this invention is to provide a vertical flow flocculation sedimentation tank to address the above-mentioned problems, thereby solving the issues of poor flocculation sedimentation effect in traditional wastewater treatment, such as floating sludge, turbid effluent, and failure of colloids to aggregate.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A vertical flow flocculation sedimentation tank for wastewater flocculation and sedimentation, comprising:

[0007] The pool body has a sewage outlet and a valve body for controlling the opening and closing of the sewage outlet at the bottom, and a drain outlet at the top.

[0008] The water inlet pipe has its outlet located in the middle of the pool body and is arranged in a vertically downward direction.

[0009] A skimming device, installed at the upper part of the pool, is used to skim off foam from the surface of the wastewater; and

[0010] A scum collection tank is located on the upper part of the pool body and can receive the scum scraped out by the scum scraping device.

[0011] Furthermore, it also includes a reflector plate, which is disposed in the lower part of the pool body and located below the water outlet end of the inlet pipe.

[0012] Furthermore, the skimming device includes a motor and a skimming plate, the skimming plate being horizontally arranged on the upper part of the pool body, and the motor being able to drive the skimming plate to rotate horizontally.

[0013] Furthermore, the lower end face of the shaving blade is serrated.

[0014] Furthermore, the bottom surface of the scum collection tank is inclined, and a scum discharge pipe is provided at the lower end of the bottom of the scum collection tank, with the other end of the scum discharge pipe connected to the collection box.

[0015] Furthermore, the water inlet pipe includes a horizontal section and a vertical section, and the lower part of the vertical section is configured as an expanded funnel-shaped opening.

[0016] Furthermore, an exhaust pipe is provided at the connection between the horizontal and vertical sections, with the other end of the exhaust pipe located at the upper part of the pool body and above the sewage surface.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model changes the water flow direction to a vertical straight direction, allowing wastewater to directly reach the bottom of the tank after entering through the inlet pipe, ensuring sufficient retention and mixing of the wastewater. Simultaneously, a reflector plate at the bottom of the inlet pipe further disperses the water flow, ensuring full contact between the wastewater and the chemicals, promoting the collision and aggregation of colloidal particles. The skimmer promptly removes floating mud and scum from the wastewater surface. The serrated design of the lower end of the skimmer plate disperses the floating mud and scum, releasing the trapped gas. With reduced buoyancy, the scum naturally settles to the bottom of the tank under gravity, preventing the accumulation and fermentation of floating mud and scum that generates gas, further improving the quality of the effluent. This solves the problem of colloids not agglomerating and effluent becoming turbid in traditional sedimentation tanks, improving the flocculation and sedimentation effect.

[0019] 2. This utility model features a unique inlet pipe design. An exhaust pipe is installed at the connection between the horizontal and vertical sections to expel gases introduced during the water intake process, preventing air bubbles from affecting the flocculation and sedimentation effect. The trumpet-shaped opening at the bottom of the vertical section expands the impact range of the water flow, further promoting the mixing of wastewater and chemicals. Furthermore, the bottom of the foam collection tank is inclined, and the foam discharge pipe is connected to the collection box, facilitating foam collection and treatment, optimizing the entire wastewater treatment process, and improving wastewater treatment efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] In the attached diagram, 1-pool body, 2-inlet pipe, 3-scraper, 4-foam collection tank, 5-reflector, 11-drain outlet, 12-drain outlet, 21-horizontal section, 22-vertical section, 23-flame-shaped opening, 24-exhaust pipe, 31-motor, 32-scraper, 41-foam discharge pipe, 42-collection box. Detailed Implementation

[0022] The specific implementation of the utility model will be further described below with reference to the accompanying drawings.

[0023] In the description of this utility model, it should be understood that the terms "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Please see Figure 1 A vertical flow flocculation sedimentation tank for wastewater flocculation and sedimentation includes a tank body 1, an inlet pipe 2, a skimmer 3, a foam collection tank 4, and a reflector plate 5; the inlet pipe 2, skimmer 3, foam collection tank 4, and reflector plate 5 are mounted on the tank body 1 via structural components. Specifically:

[0027] The pool body 1 has a drain outlet 11 and a valve body for controlling the opening and closing of the drain outlet 11 at the bottom, and a drain outlet 12 at the top. The bottom of the pool body 1 is inverted cone-shaped to facilitate the direct sinking of large particles to the bottom for discharge. Multiple drain outlets 12 can be provided, and multiple drain outlets 12 are evenly distributed along the outer periphery of the pool body 1. Several support legs are provided at the bottom of the pool body 1 to facilitate the support and erection of the pool body 1.

[0028] The water inlet pipe 2 has its outlet end located in the middle of the pool body 1 and is set in a vertically downward direction. Specifically, the water inlet pipe 2 includes a horizontal section 21 and a vertical section 22. The lower part of the vertical section 22 is set as an expanded trumpet-shaped opening 23. An exhaust pipe 24 is provided at the connection between the horizontal section 21 and the vertical section 22. The other end of the exhaust pipe 24 is located on the upper part of the pool body 1 and is higher than the sewage surface.

[0029] A skimming device 3 is installed on the upper part of the pool body 1 to remove the foam on the surface of the sewage. The skimming device 3 includes a motor 31 and a skimming plate 32. The skimming plate 32 is horizontally installed on the upper part of the pool body 1. The motor 31 can drive the skimming plate 32 to rotate horizontally. In this embodiment, the lower end face of the skimming plate 32 is set as a sawtooth shape.

[0030] The scum collection tank 4 is set on the upper part of the pool body 1 and can receive the scum scraped out by the scum scraper 3; the bottom surface of the scum collection tank 4 is inclined, and the lower end of the bottom of the scum collection tank 4 is provided with a scum discharge pipe 41, and the other end of the scum discharge pipe 41 is connected to the collection box 42.

[0031] The reflector plate 5 is located in the lower part of the pool body 1 and below the water outlet end of the inlet pipe 2.

[0032] The specific working principle is as follows:

[0033] 1. After flocculant is added in the previous process, the wastewater flows vertically through the inlet pipe 2 and the funnel-shaped opening 23. The vertically flowing wastewater is evenly distributed across the entire horizontal section of the sedimentation zone by the reflector plate 5 at the bottom of the sedimentation tank. The water then slowly flows upwards and overflows through the top drain outlet 12. Suspended particles settle backwards under gravity, finally falling into the bottom drain outlet 11. Hydrostatic pressure then allows the wastewater to exit through the valve body of the drain outlet 11. Because the particle settling velocity is downwards while the water flow velocity is upwards, only particles with a settling velocity greater than the water flow velocity are retained. Gas generated in the water is discharged through an exhaust pipe 24, reducing the phenomenon of gas accumulating at the bottom of the sedimentation tank and causing sludge to float to the surface.

[0034] 2. Suspended particles carried to the water surface by the water flow gather on the water surface. The scraper driven by motor 31 scrapes the suspended particles to the foam collection tank 4, and flows through the foam discharge pipe 41 to the collection box 42 for collection.

[0035] 3. After the above steps, suspended particles and sludge in the wastewater are removed, the concentration of suspended solids in the wastewater is significantly reduced, and the treatment effect is obvious.

[0036] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A vertical flow flocculation sedimentation tank for flocculation and sedimentation of wastewater, characterized in that: include The pool body has a sewage outlet and a valve body at the bottom to control the opening and closing of the sewage outlet, and a drain outlet at the top. The water inlet pipe has its outlet located in the middle of the pool body and is arranged in a vertically downward direction. A skimming device is installed on the upper part of the pool body to remove foam from the surface of the sewage. as well as A scum collection tank is located on the upper part of the pool body and can receive the scum scraped out by the scum scraping device.

2. The vertical flow flocculation sedimentation tank according to claim 1, characterized in that: It also includes a reflector plate, which is disposed in the lower part of the pool body and located below the water outlet end of the inlet pipe.

3. The vertical flow flocculation sedimentation tank according to claim 1, characterized in that: The skimming device includes a motor and a skimming plate. The skimming plate is horizontally arranged on the upper part of the pool body, and the motor can drive the skimming plate to rotate horizontally.

4. A vertical flow flocculation sedimentation tank according to claim 3, characterized in that: The lower end face of the shaving blade is serrated.

5. A vertical flow flocculation sedimentation tank according to claim 1, characterized in that: The bottom surface of the foam collection tank is inclined, and a foam discharge pipe is provided at the lower end of the bottom of the foam collection tank. The other end of the foam discharge pipe is connected to the collection box.

6. A vertical flow flocculation sedimentation tank according to claim 1, characterized in that: The water inlet pipe includes a horizontal section and a vertical section, and the lower part of the vertical section is configured as an expanded funnel-shaped opening.

7. A vertical flow flocculation sedimentation tank according to claim 6, characterized in that: An exhaust pipe is provided at the connection between the horizontal and vertical sections, and the other end of the exhaust pipe is located at the top of the pool body and above the sewage surface.

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