Sewage treatment device based on sedimentation tank

Abstract

The utility model discloses a sewage treatment device based on a sedimentation tank, which belongs to the technical field of sewage treatment and comprises the sedimentation tank and a sewage disposal component, a sedimentation tank is arranged at the bottom of the sedimentation tank, and the sedimentation tank is provided with a water inlet and a water outlet; the sewage disposal assembly comprises a plurality of chain wheels arranged on the sedimentation tank and a chain wound on the chain wheels, a circulation path of the chain comprises a tank bottom dredging section, a water surface fishing section and a scum dumping section, and a scum collecting tank is arranged on the sedimentation tank below the scum dumping section. According to the sewage treatment device designed by the utility model, the sewage cleaning assembly is designed in the sedimentation tank and takes the chain driving mechanism as a carrier, the plurality of sewage scraping plates are fixed on the chain, and along with the circulating rotation of the chain, the sewage scraping plates scrape sludge deposited at the bottom of the tank into the sedimentation tank and collect scum on the water surface at the same time; and the collected scum is poured into the scum collecting tank, so that comprehensive cleaning of the tank bottom and the water surface is realized, and normal operation of the sedimentation tank is maintained.

Description

A wastewater treatment device based on a sedimentation tank Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater treatment device based on a sedimentation tank. Background Technology

[0002] In existing wastewater treatment systems, sedimentation tanks are commonly used as a means of wastewater purification. Some impurities in the wastewater gradually settle in the sedimentation tank and accumulate at the bottom, requiring timely cleaning. Traditional sedimentation tanks are usually only equipped with simple bottom sludge discharge devices, which are insufficient for effectively collecting and treating surface scum, necessitating the installation of additional flotation equipment or manual removal devices. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a wastewater treatment device based on a sedimentation tank. By setting up a scum collection tank and a scum dumping section, the treatment of surface scum and the cleaning of the tank bottom can be carried out simultaneously, effectively cleaning the wastewater.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a wastewater treatment device based on a sedimentation tank, comprising:

[0005] A sedimentation tank, wherein a sedimentation trough is provided at the bottom of one end of the sedimentation tank, an inlet is provided at one end of the sedimentation tank near the sedimentation trough, and an outlet is provided at the other end;

[0006] The cleaning component includes multiple sprockets mounted on a sedimentation tank and a chain wound around the sprockets. Multiple evenly spaced scraper blades are mounted on the chain. The circulation path of the chain includes a bottom sludge removal section, a surface dredging section, and a scum dumping section. A scum collection trough is provided on the sedimentation tank below the scum dumping section.

[0007] Preferably, the scraper includes a straight plate and an arc-shaped plate fixed on the straight plate. When the scraper moves along the bottom sludge removal section, the straight plate scrapes the sludge from the bottom of the pool towards the sedimentation tank. When the scraper moves along the surface dredging section, the end of the straight plate away from the arc-shaped plate extends out of the water surface, and the arc-shaped plate is below the water surface. When the scraper moves along the scum dumping section, the scraper flips over above the scum collection tank.

[0008] Preferably, the arc-shaped plate has a drain groove, and a filter screen is provided on the drain groove.

[0009] Preferably, a rotating shaft is rotatably mounted on the scum collection tank, and a spiral blade is provided on the rotating shaft inside the scum collection tank.

[0010] Preferably, a drive sprocket is provided at one end of the rotating shaft extending out of the scum collection tank, and the drive sprocket is connected to the driven sprocket.

[0011] Preferably, a flow equalization plate is provided at one end of the sedimentation tank near the inlet, and a plurality of flow equalization holes are evenly formed on the flow equalization plate.

[0012] Preferably, a plurality of guide plates are provided in the sedimentation tank between the water inlet and the flow equalization plate, and the plurality of guide plates are distributed alternately.

[0013] Preferably, the scum collection trough has a scum discharge port at one end extending outside the sedimentation tank.

[0014] Preferably, a sewage pump is installed in the sedimentation tank, and the sewage pump discharges the sludge in the sedimentation tank into the sedimentation pool through a sewage pipe.

[0015] Preferably, a baffle plate is provided at one end of the sedimentation tank near the outlet.

[0016] The beneficial effects of this utility model are as follows:

[0017] This wastewater treatment device incorporates a cleaning component within the sedimentation tank. This component utilizes a chain-driven mechanism with multiple scraper blades fixed to the chain. As the chain rotates, the scraper blades scrape the sludge deposited at the bottom of the tank into the sedimentation trough. Simultaneously, the chain also moves the scraper blades across the water surface, collecting scum and lifting them above the scum collection trough. The scraper blades then flip, dumping the collected scum into the scum collection trough, achieving comprehensive cleaning of both the tank bottom and surface and maintaining the normal operation of the sedimentation tank. Furthermore, this device includes a rotating shaft and spiral blades within the scum collection trough. The shaft is linked to the chain, causing the spiral blades to rotate and transport the scum from the scum collection trough to the outside of the sedimentation tank. A sewage pump installed within the sedimentation trough discharges sludge from the sedimentation trough to the outside of the sedimentation tank via a sewage pipe, preventing excessive sludge from affecting sedimentation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a front-view perspective perspective view of a sewage treatment device based on a sedimentation tank provided in an embodiment of this utility model.

[0020] Figure 2 is a top view of the overall structure of this utility model.

[0021] Figure 3 is a rear-view perspective view of the overall structure of this utility model.

[0022] Figure 4 is a right view of the overall structure of this utility model.

[0023] Figure 5 is a schematic diagram of the chain circulation path in this utility model.

[0024] Figure 6 is a magnified view of part A in Figure 5.

[0025] Figure 7 is a schematic diagram of the structure of the scraper in this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Sedimentation tank; 2. Sedimentation tank; 3. Inlet; 4. Outlet; 5. Driven sprocket; 6. Driven sprocket; 7. Chain; 8. Motor; 9. Sludge scraper; 91. Straight plate; 92. Curved plate; 93. Drainage trough; 10. Bottom cleaning section; 11. Surface retrieval section; 12. Scum dumping section; 13. Scum collection trough; 131. Scum discharge port; 14. Rotating shaft; 15. Spiral blade; 16. Drive sprocket; 17. Flow equalization plate; 18. Guide plate; 19. Sewage pipe; 20. Baffle 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] As shown in Figures 1 to 7, Embodiment 1 of this utility model provides a wastewater treatment device based on a sedimentation tank 1, including a rectangular sedimentation tank 1 and a cleaning component installed on the sedimentation tank 1. During the wastewater sedimentation process, as particles in the wastewater settle, sludge gradually accumulates at the bottom of the sedimentation tank 1. If it is not cleaned, the sludge will gradually occupy the volume of the sedimentation tank 1, resulting in the inability to achieve normal sedimentation.

[0031] To facilitate sludge removal, as shown in Figure 5, this invention incorporates a sedimentation trough 2 at one end of the sedimentation tank 1. This trough is positioned lower than other parts of the sedimentation tank 1, allowing sludge to accumulate here. Since the sedimentation tank 1 has a certain length, sludge will gradually settle in other parts of the sedimentation tank 1. Timely cleaning is necessary to move the sludge to the sedimentation trough 2, and then a sewage pump installed in the sedimentation trough 2 will discharge the sludge from the sedimentation tank 1 through the sewage pipe 19.

[0032] To facilitate the collection of sludge from the bottom of sedimentation tank 1 into sedimentation tank 2, the cleaning assembly designed in this invention includes a chain drive mechanism and multiple scraper blades 9. As shown in Figures 1 and 3, the chain drive mechanism comprises several driven sprockets 5 rotatably mounted in sedimentation tank 1 and a driving sprocket 6. A motor 8 is fixed to a frame on sedimentation tank 1, and the output shaft of motor 8 drives the driving sprocket 6 to rotate. A chain 7 is wound around the driving sprocket 6 and the multiple driven sprockets 5. The scraper blades 9 are fixed to the chain 7 via ear plates. When motor 8 drives chain 7 to rotate, chain 7 causes scraper blades 9 to move cyclically along a circulation path.

[0033] As shown in Figure 5, the circulation path of chain 7 mainly includes three functional sections: the bottom sludge removal section 10, the surface scooping section 11, and the scum dumping section 12. The other sections of chain 7 are used to connect these three functional sections in sequence. A scum collection trough 13 is fixed on the sedimentation tank 1 below the scum dumping section 12. As shown in Figure 7, the scraper 9 consists of a straight plate 91 and an arc-shaped plate 92, with the straight plate 91 fixed to one side of the arc-shaped plate 92. Sealing plates are fixed at both ends of the arc-shaped plate 92, which gives the arc-shaped plate 92 a certain scooping capacity. Multiple drainage troughs 93 are opened on the arc-shaped plate 92, and filter screens are embedded in the drainage troughs 93. The filter screens can trap the scum on the water surface and drain the water inside.

[0034] As shown in Figure 5, when the scraper 9 enters the bottom sludge removal section 10, one side of the straight plate 91 contacts the bottom of the tank. With the dragging of the chain 7, the shearing force generated by the linear movement of the straight plate 91 pushes the sludge at the bottom of the sedimentation tank 1 towards the sedimentation trough 2. At this time, the arc-shaped plate 92 is positioned in front of the straight plate 91 in its direction of movement, which can cover some of the turbulent sludge, thus preventing the sludge at the bottom of the tank from turbulting upwards due to the scraping action of the straight plate 91. When the scraper 9 moves to the surface retrieval section 11, the arc-shaped plate 92 is located below the straight plate 91. The straight plate 91 flips over and partially extends out of the water, while the arc-shaped plate 92 is submerged in the water. As the scraper 9 moves on the water surface, it can push the scum along. A baffle plate 20 is also fixed inside the sedimentation tank 1. The baffle plate 20 intercepts the scum on the water surface, preventing it from flowing out of the outlet 4. As the scraper plate 9 approaches the scum dumping section 12, it extends fully above the water surface with the movement of the chain 7, scooping up the scum in front of the baffle plate 20. The scum then falls onto the curved plate 92, and the water in the scum falls from the filter screen and the drain trough 93 into the sedimentation tank 1. When the scraper plate 9 reaches the scum dumping section 12, it rotates 180° above the scum collection trough 13 as the chain 7 changes angle, causing the scum on the curved plate 92 to be poured into the scum collection trough 13.

[0035] Through the above settings, this utility model achieves simultaneous treatment of sludge at the bottom of sedimentation tank 1 and scum on the water surface, reducing the frequency of manual dredging.

[0036] Example 2:

[0037] Based on Embodiment 1, in order to promptly discharge the scum from the scum collection tank 13, a scum discharge port 131 is provided at the bottom of the end of the scum collection tank 13 that extends outside the sedimentation tank 1. Simultaneously, a rotating shaft 14 is rotatably installed within the scum collection tank 13, and a spiral blade 15 is fitted onto the portion of the rotating shaft 14 inside the scum collection tank 13. When the rotating shaft 14 rotates, the spiral blade 15 drives the scum in the scum collection tank 13 to be discharged from the scum discharge port 131.

[0038] To drive the rotating shaft 14 to rotate, this invention employs a transmission structure between the rotating shaft 14 and the chain 7. As shown in Figure 6, a transmission sprocket 16 is fixed on the rotating shaft 14, and another transmission sprocket 16 is coaxially mounted on the driven sprocket 5 adjacent above the rotating shaft 14. These two transmission sprockets 16 are driven by another chain. When the motor 8 drives the chain 7 to rotate, the rotating shaft 14 is also able to rotate through the transmission sprockets 16. Therefore, the cleaning assembly of this invention only requires one motor 8 as a power source.

[0039] Example 3:

[0040] Based on Embodiments 1 and 2, this invention adds a flow equalization plate 17 with several flow equalization holes fixedly installed in the sedimentation tank 1 near the inlet 3. This allows the wastewater entering from the inlet 3 to be diverted and slowed down by the flow equalization plate 17, resulting in a more uniform flow within the sedimentation tank 1 and thus improving the sludge settling effect.

[0041] This invention also includes two staggered guide plates 18 between the flow equalization plate 17 and the inlet 3. The guide plates 18 obstruct the water flow at the inlet 3, reduce the impact of sewage on the flow equalization plate 17, reduce the flow velocity, and allow the sewage to pass through the flow equalization plate 17 more evenly.

[0042] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A wastewater treatment device based on a sedimentation tank, characterized in that, include: A sedimentation tank, wherein a sedimentation trough is provided at the bottom of one end of the sedimentation tank, an inlet is provided at one end of the sedimentation tank near the sedimentation trough, and an outlet is provided at the other end; The cleaning component includes multiple sprockets mounted on a sedimentation tank and a chain wound around the sprockets. Multiple evenly spaced scraper blades are mounted on the chain. The circulation path of the chain includes a bottom sludge removal section, a surface dredging section, and a scum dumping section. A scum collection trough is provided on the sedimentation tank below the scum dumping section.

2. The wastewater treatment device based on a sedimentation tank as described in claim 1, characterized in that, The sludge scraper includes a straight plate and an arc-shaped plate fixed on the straight plate. When the sludge scraper moves along the bottom sludge removal section, the straight plate scrapes the sludge from the bottom of the pool towards the sedimentation tank. When the sludge scraper moves along the surface dredging section, the end of the straight plate away from the arc-shaped plate extends out of the water surface, and the arc-shaped plate is below the water surface. When the sludge scraper moves along the scum dumping section, the sludge scraper flips over above the scum collection tank.

3. A wastewater treatment device based on a sedimentation tank as described in claim 2, characterized in that, The arc-shaped plate has a drainage groove, and a filter screen is provided on the drainage groove.

4. A wastewater treatment device based on a sedimentation tank as described in claim 1, characterized in that, A rotating shaft is rotatably installed on the scum collection tank, and spiral blades are provided on the rotating shaft inside the scum collection tank.

5. A wastewater treatment device based on a sedimentation tank as described in claim 4, characterized in that, A drive sprocket is provided at one end of the rotating shaft that extends out of the scum collection tank, and the drive sprocket is connected to the driven sprocket.

6. A wastewater treatment device based on a sedimentation tank as described in claim 1, characterized in that, A flow equalization plate is provided at one end of the sedimentation tank near the inlet, and multiple flow equalization holes are evenly distributed on the flow equalization plate.

7. A wastewater treatment device based on a sedimentation tank as described in claim 6, characterized in that, Multiple guide plates are installed in the sedimentation tank between the water inlet and the flow equalization plate, and the multiple guide plates are distributed alternately.

8. A wastewater treatment device based on a sedimentation tank as described in claim 1, characterized in that, The scum collection trough extends to one end outside the sedimentation tank and has a scum discharge port.

9. A wastewater treatment device based on a sedimentation tank as described in claim 1, characterized in that, A sewage pump is installed in the sedimentation tank, and the sewage pump discharges the sludge in the sedimentation tank into the sedimentation pool through a sewage pipe.

10. A wastewater treatment device based on a sedimentation tank as described in claim 1, characterized in that, A baffle plate is installed at one end of the sedimentation tank near the outlet.

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