A sedimentation tank for sewage treatment

Abstract

This utility model discloses a sedimentation tank for wastewater treatment, including a tank body. An I-beam is installed at the top of the tank body, and a scraping assembly is mounted on the I-beam. The scraping assembly includes a base, and a first motor is mounted on the base. The output shaft of the first motor is fixedly connected to a roller, and the roller is in a rolling connection with the I-beam. A skimming assembly and a sludge scraping assembly are provided at the lower end of the base. The skimming assembly includes a skimming plate and a second motor, and the sludge scraping assembly includes a sludge scraping plate and a third motor. The second motor drives the skimming plate to rotate, and the third motor drives the sludge scraping plate to rotate. The scraping assembly of this utility model, located at the top of the tank body, allows the motor to drive the skimming plate and sludge scraping plate to move out of the wastewater, replacing the conventional chain-type scraping structure. This design is simple in structure, convenient to inspect and maintain, and has low operating and maintenance costs.

Description

Technical Field

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

[0002] Wastewater treatment refers to the process of converting wastewater containing pollutants (such as organic matter, suspended solids, pathogens, nutrients, etc.) into water that meets discharge standards or is reusable, through physical, chemical, and biological methods. Its core objective is to reduce the harm of wastewater to the environment, protect water resources, and achieve sustainable utilization.

[0003] The chain-type scum scraper assembly used in sedimentation tanks typically consists of a chain, scraper, drive unit, tensioning device, etc. It is a common scum collection device. This scum scraper assembly requires a large amount of maintenance. Impurities such as fibers, hair, and hard suspended solids in sewage can easily entangle and jam the chain. Problems such as chain jamming, sprocket wear, and tensioning device failure need to be checked one by one, resulting in high maintenance costs. Utility Model Content

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

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sedimentation tank for sewage treatment, comprising a tank body, an I-beam installed at the top of the tank body, a sludge scraping assembly installed on the I-beam, the sludge scraping assembly comprising a base, a first motor installed on the base, the output shaft of the first motor being fixedly connected to a roller, and the roller being in rolling connection with the I-beam, the lower end of the base being provided with a skimming assembly and a sludge scraping assembly, the skimming assembly comprising a skimming plate and a second motor, the sludge scraping assembly comprising a sludge scraping plate and a third motor, the second motor driving the skimming plate to rotate, and the third motor driving the sludge scraping plate to rotate.

[0006] The rollers are provided in two sets, and the two sets of rollers are located in the grooves on both sides of the I-beam.

[0007] The skimming assembly includes a first mounting bracket, a second motor mounted on one side end face of the first mounting bracket, an output shaft of the second motor fixedly connected to a rotating shaft, and a skimming plate fixedly connected to the rotating shaft.

[0008] The sludge scraping assembly includes a second mounting bracket, a third motor mounted on one side end face of the second mounting bracket, an output shaft of the third motor fixedly connected to a rotating shaft, a rotating shaft fixedly connected to a drive arm, and a drive arm fixedly connected to a sludge scraper.

[0009] The pool body includes a mud hopper, and a mud discharge pipe is installed inside the mud hopper.

[0010] The pool body has an inlet pipe on one side and an outlet pipe on the other side.

[0011] The water inlet pipe is equipped with a flow-rectifying wall, and the flow-rectifying wall has multiple sets of holes.

[0012] The outlet pipe is equipped with a slag baffle and an outlet weir.

[0013] The pool is equipped with a slag collection hopper, which is connected to a slag discharge pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The sludge scraping assembly of this utility model includes a sludge skimming assembly and a sludge scraping assembly. During sludge skimming, the sludge skimming plate rotates to the working position and contacts the floating sludge on the water surface. During sludge scraping, the sludge scraping plate rotates to the working position and contacts the bottom of the pool. The positions of the sludge skimming plate and the sludge scraping plate are adjusted by the linear drive mechanism of the sludge scraping assembly. During the linear movement, the sludge skimming plate pushes the floating sludge to the sludge collection area, and the sludge scraping plate scrapes the sludge at the bottom of the pool to the sludge hopper. The sludge scraping assembly is located at the top of the pool body. The motor can drive the sludge skimming plate and the sludge scraping plate to move out of the sewage. It replaces the conventional chain-type sludge scraping structure, which is simple in structure, convenient in inspection and maintenance, and has low operation and maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one side view of the structure of this utility model; Figure 2 This is a schematic diagram of the structure from another side view of the present invention; Figure 3 This is a schematic diagram of the overall structure of this utility model; Figure 4 This is a schematic diagram of the slag scraping assembly of this utility model.

[0016] In the diagram: 1. Pool body; 2. I-beam; 3. Sludge scraper assembly; 11. Sludge hopper; 12. Sludge discharge pipe; 13. Water inlet pipe; 14. Flow straightening wall; 141. Hole; 15. Sludge collection hopper; 16. Sludge discharge pipe; 17. Sludge baffle plate; 18. Water outlet weir plate; 19. Water outlet pipe; 31. Base; 32. First motor; 33. Roller; 34. Sludge skimming assembly; 35. Sludge scraper assembly; 341. First mounting frame; 342. Second motor; 343. Sludge skimming plate; 351. Second mounting frame; 352. Third motor; 353. Rotating shaft; 354. Drive arm; 355. Sludge scraper. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-4 This utility model provides a technical solution: a sedimentation tank for sewage treatment, including a tank body 1, an I-beam 2 installed at the top of the tank body 1, a scraper assembly 3 installed on the I-beam 2, the scraper assembly 3 including a base 31, a first motor 32 installed on the base 31, the output shaft of the first motor 32 is fixedly connected to a roller 33, and the roller 33 is in rolling connection with the I-beam 2, the lower end of the base 31 is provided with a skimming assembly 34 and a sludge scraping assembly 35, the skimming assembly 34 including a skimming plate 343 and a second motor 342, the sludge scraping assembly 35 including a sludge scraping plate 355 and a third motor 352, the second motor 342 drives the skimming plate 343 to rotate, and the third motor 352 drives the sludge scraping plate 355 to rotate.

[0019] The rollers 33 are provided in two sets, which are located in the grooves on both sides of the I-beam 2. One set of rollers 33 is the driving roller, and the other set of rollers 33 is the driven roller. The first motor 32 drives the driving roller 33 to rotate, directly providing the power to move along the I-beam 2. The movement is achieved through rolling friction. The driven roller 33 rolls synchronously with the driving roller 33 to support the weight of the slag scraping assembly 3 and maintain balance. The base 31, the first motor 32 and the rollers 33 constitute the linear drive mechanism of the slag scraping assembly 3.

[0020] When the second motor 342 is working, it drives the skimming plate 343 to rotate and adjusts the deflection angle of the skimming plate 343. When the third motor 352 is working, it drives the sludge scraper 355 to rotate and adjusts the deflection angle of the sludge scraper 355. When skimming is not performed, the skimming plate 343 can rotate to avoid the scum. When skimming is performed, the skimming plate 343 rotates to the working position and contacts the floating scum on the water surface. When sludge scraping is not performed, the sludge scraper 355 can rotate to avoid the scum. When sludge scraping is performed, the sludge scraper 355 rotates to the working position. In operation, the scraper 355 contacts the bottom of the tank. The positions of the skimming plate 343 and the scraper 355 are adjusted by the linear drive mechanism. During the linear movement, the skimming plate 343 pushes the scum to the scum collection area, and the scraper 355 scrapes the sludge from the bottom of the tank to the sludge hopper 11. The scraper assembly 3 is located at the top of the tank body 1. The motor can drive the skimming plate 343 and the scraper 355 to move out of the sewage. The scraper assembly 3 has a simple structure, replacing the conventional chain scraper structure. It is easy to inspect and maintain, and has low operation and maintenance costs.

[0021] The skimming assembly 34 includes a first mounting bracket 341, a second motor 342 mounted on one end face of the first mounting bracket 341, an output shaft of the second motor 342 fixedly connected to a rotating shaft, and a skimming plate 343 fixedly connected to the rotating shaft. Figure 4 As shown, when the second motor 342 is working, it drives the rotating shaft at one end, and the rotating shaft drives the skimming plate 343 to rotate relative to the first mounting frame 341, thereby adjusting the deflection angle of the skimming plate 343.

[0022] The sludge scraping assembly 35 includes a second mounting bracket 351, a third motor 352 mounted on one end face of the second mounting bracket 351, an output shaft of the third motor 352 fixedly connected to a rotating shaft 353, a rotating shaft 353 fixedly connected to a drive arm 354, and a drive arm 354 fixedly connected to a scraper blade 355. Figure 4 As shown, when the third motor 352 is working, it drives the rotating shaft 353 at one end to rotate. The rotating shaft 353 drives the drive arm 354 to move, and the drive arm 354 drives the scraper 355 to move. The deflection angle of the scraper 355 is adjusted. When scraping mud, the scraper 355 is driven to contact the bottom of the pool.

[0023] The pool body 1 includes a sludge hopper 11, and a sludge discharge pipe 12 is installed inside the sludge hopper 11. The sludge discharge pipe 12 is connected to a pump body. When the pump body is working, the sludge inside the sludge hopper 11 is discharged through the sludge discharge pipe 12.

[0024] The pool body 1 has an inlet pipe 13 on one side and an outlet pipe 19 on the other side. Wastewater enters the pool body 1 through the inlet pipe 13 and is discharged through the outlet pipe 19 after sedimentation.

[0025] The inlet pipe 13 is equipped with a flow straightening wall 14, which has multiple sets of holes 141. The flow straightening wall 14 optimizes the water flow pattern through physical structure, creating stable and uniform flow conditions for the subsequent sedimentation process. Through the multiple sets of holes 141 on the flow straightening wall 14, the concentrated inlet water is decomposed into multiple fine streams, dispersing the kinetic energy of the water flow and making the inlet water evenly distributed across the cross section of the entire sedimentation zone, avoiding disturbance of the sludge layer and short-circuiting phenomenon caused by local high-speed flow.

[0026] Among them, a slag baffle 17 and a water outlet weir 18 are installed at the water outlet pipe 19. The slag baffle 17 is installed in front of the water outlet pipe 19 to intercept the floating scum on the water surface in the sedimentation zone and prevent it from flowing out with the clarified water.

[0027] The pool body 1 is equipped with a slag collection hopper 15, which is connected to a slag discharge pipe 16. The slag is pushed into the slag collection hopper 15 by the slag skimmer 343, and then enters the slag discharge pipe 16 through the slag collection hopper 15 and is discharged through the slag discharge pipe 16.

[0028] Working principle: Wastewater enters the inlet area through inlet pipe 13. The flow straightening wall 14 causes the wastewater to enter the sedimentation zone in a low-turbulence, uniform flow state, creating stable conditions for subsequent settling. In the sedimentation zone, the wastewater flows slowly in a laminar or mildly turbulent state. Some suspended solids, due to their density being greater than water, settle vertically to the bottom of the tank under gravity, forming a sludge layer. Solid particles in the wastewater with a density close to or less than that of water cannot settle naturally and float on the surface, forming scum. The clarified water after sedimentation is discharged from the outlet pipe 19 in the outlet area. During skimming, the skimming plate 343 rotates to the working position. When the sludge is in contact with the surface scum and is scraping the mud, the scraper plate 355 rotates to the working position and contacts the bottom of the pool. The position of the skimming plate 343 and the scraper plate 355 is adjusted by the linear drive mechanism of the scum scraping assembly 3. During the linear movement, the skimming plate 343 pushes the scum into the scum collection hopper 15, and then enters the scum discharge pipe 16 through the scum collection hopper 15, and is finally discharged through the scum discharge pipe 16. The scraper plate 355 scrapes the sludge at the bottom of the pool into the mud hopper 11. The sludge discharge pipe 12 is connected to the pump body. When the pump body works, the sludge inside the mud hopper 11 is discharged through the sludge discharge pipe 12.

[0029] 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 sedimentation tank for wastewater treatment, comprising a tank body (1), characterized in that: The top of the pool body (1) is equipped with an I-beam (2), and a scraper assembly (3) is installed on the I-beam (2). The scraper assembly (3) includes a base (31), and a first motor (32) is installed on the base (31). The output shaft of the first motor (32) is fixedly connected to a roller (33), and the roller (33) is in rolling connection with the I-beam (2). The lower end of the base (31) is provided with a skimming assembly (34) and a mud scraping assembly (35). The skimming assembly (34) includes a skimming plate (343) and a second motor (342). The mud scraping assembly (35) includes a mud scraping plate (355) and a third motor (352). The second motor (342) drives the skimming plate (343) to rotate, and the third motor (352) drives the mud scraping plate (355) to rotate.

2. A sedimentation basin for sewage treatment according to claim 1, characterized in that: The rollers (33) are provided in two sets, and the two sets of rollers (33) are respectively located in the grooves on both sides of the I-beam (2).

3. The sedimentation basin for sewage treatment according to claim 1, characterized in that: The skimming assembly (34) includes a first mounting bracket (341), a second motor (342) mounted on one side end face of the first mounting bracket (341), the output shaft of the second motor (342) is fixedly connected to a rotating shaft, and the rotating shaft is fixedly connected to a skimming plate (343).

4. The sedimentation basin for sewage treatment according to claim 1, characterized in that: The sludge scraping assembly (35) includes a second mounting bracket (351), a third motor (352) is mounted on one side end face of the second mounting bracket (351), the output shaft of the third motor (352) is fixedly connected to a rotating shaft (353), the rotating shaft (353) is fixedly connected to a drive arm (354), and the drive arm (354) is fixedly connected to a sludge scraper (355).

5. The sedimentation basin for sewage treatment according to claim 1, characterized in that: The pool body (1) includes a mud hopper (11), and a mud discharge pipe (12) is installed inside the mud hopper (11).

6. The sedimentation basin for sewage treatment according to claim 1, characterized in that: A water inlet pipe (13) is provided on one side of the pool body (1), and a water outlet pipe (19) is provided on the other side of the pool body (1).

7. A sedimentation tank for wastewater treatment according to claim 6, characterized in that: A flow straightening wall (14) is provided at the water inlet pipe (13), and multiple sets of holes (141) are opened on the flow straightening wall (14).

8. A sedimentation tank for wastewater treatment according to claim 6, characterized in that: A baffle plate (17) and a weir plate (18) are provided at the outlet pipe (19).

9. A sedimentation tank for wastewater treatment according to claim 1, characterized in that: The pool body (1) is provided with a slag collection hopper (15), which is connected to a slag discharge pipe (16).

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