Dynamic cleaning device and method for industrial wastewater dephosphorization sedimentation tank

Abstract

The invention discloses a dynamic cleaning device and method for an industrial wastewater dephosphorization sedimentation tank, and relates to the technical field of industrial wastewater treatment. In the invention, a collecting trough is provided below the sedimentation tank body, the sedimentation tank body is fixedly connected to a sludge suction pump, a collecting pipe is provided at the output end of the sludge suction pump, one end of the collecting pipe extends into the collecting trough, and under the joint action of a push block, a fixed plate and a blocking plate, after too much sediment passes over the scraper, the sediment and water will enter the collecting frame together, and under the joint blocking of the fixed plate and the blocking plate, the water will slow down when flowing in the collecting frame, and will not drive too much sediment to flow through the filtering structure when flowing through the filtering structure, and in the process of the push block moving upward, the sediment accumulated on the surface of the push block will be pushed out, and the push block will drive the cleaning brush to move upward when moving upward, and the cleaning brush will brush the sediment attached to the filtering structure when moving upward, so as to keep the filtering structure unobstructed.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial wastewater treatment, in particular to a dynamic cleaning device and method for an industrial wastewater dephosphorization sedimentation tank. Background Art

[0002] A sedimentation tank is a structure that uses sedimentation to remove suspended solids from water. Sedimentation tanks are widely used in wastewater treatment. They come in many types, classified by the direction of water flow: horizontal flow, vertical flow, and radial flow. They consist of an inlet and outlet, a water flow section, and a sludge hopper. Horizontal flow sedimentation tanks are often constructed of concrete, but can also be constructed with masonry or earthenware linings. Adding a scraper or mechanically removing heavier sediment can improve tank efficiency. Phosphorus removal technologies primarily include chemical and biological phosphorus removal. Chemical phosphorus removal involves the addition of chemical agents to form insoluble phosphate precipitates, ultimately removing phosphorus from wastewater through solid-liquid separation. Its advantages include simple operation, effective phosphorus removal, high and stable treatment efficiency, and the prevention of secondary pollution.

[0003] The physical sedimentation step is generally carried out in a sedimentation tank. The waste liquid is left to stand in the sedimentation tank for a preset time. After the preset time, the sediment settles at the bottom of the tank, and then the sediment at the bottom of the sedimentation tank is scraped off by a scraping device and collected. When the scraper is scraping the sediment, as the scraping time increases, the sediment accumulates on one side of the scraper, the amount of sediment accumulation increases, and the sludge easily crosses the scraper.

[0004] When scraping, as the scraper moves, the sediment accumulated on the scraper gradually increases. When the sediment accumulates too much, the accumulated impurities may overflow the scraper and fall on the side that has been scraped, resulting in poor scraping effect.

[0005] The existing treatment method is to raise the scraper to prevent impurities from overflowing the scraper. However, raising the scraper will increase the "resistance area" in the vertical direction when the scraper moves in the sedimentation tank, and it will also disturb the water in the sedimentation tank. A large amount of water will come into contact with the sludge sediment and then rise along the "high-position" scraper and pass over the "high-position" scraper, making the water turbid, which is not conducive to sedimentation in the sedimentation tank.

[0006] In the face of the above situation, reducing the water resistance during sludge scraping and cleaning and avoiding the large turbidity impact on the filtered water during sludge scraping and cleaning have become problems that need to be solved. Summary of the Invention

[0007] In order to solve the above technical problems, the present invention provides a dynamic cleaning device and method for an industrial wastewater dephosphorization sedimentation tank, which realizes that when too much sediment passes over the scraper, the sediment will fall into the collection frame. When the scraper moves to the collection tank, the pushing block will push the sediment accumulated in the collection frame upward, push the sediment out, and drop it into the collection tank, thereby reducing the water resistance during sludge scraping and cleaning, and avoiding the large turbidity impact on the filtered water during sludge scraping and cleaning.

[0008] To achieve the above objectives, the present invention provides a dynamic cleaning device for an industrial wastewater dephosphorization sedimentation tank, the structure of which is as follows:

[0009] The sedimentation tank includes a main body and a sludge suction pump. A collection trough is provided below the main body, which is fixedly connected to the sludge suction pump. A collection pipe is provided at the output end of the sludge suction pump, one end of which extends into the collection trough. A collection frame is slidingly provided within the main body of the sedimentation tank, and the main body of the sedimentation tank is equipped with a drive assembly for moving the collection frame.

[0010] Taking the collection frame as the benchmark: the sedimentation tank body located on one side of the collection tank is the sedimentation area, and the other side of the collection frame is the filtration structure.

[0011] A driving mechanism is provided on the outside of the sedimentation tank body, and the driving mechanism includes a driving motor, etc. A collection frame is slidingly provided inside the sedimentation tank body. A scraper is fixedly provided on the side of the collection frame facing the collection trough, a push block is provided inside the collection frame, and an inclined blocking plate is fixedly connected to the top of the push block. A filtering structure is provided on the side of the collection frame away from the scraper, and a cleaning brush that contacts the surface of the filtering structure is fixedly provided on the side of the blocking plate facing the filtering structure. A telescopic assembly is fixedly provided in the collection frame, and one end of the telescopic assembly is connected to a telescopic rod, and one end of the telescopic rod passes through the blocking plate and is fixedly connected to the push block. A fixed plate is fixedly provided inside the collection frame, and an auxiliary rod is fixedly provided at the bottom of the fixed plate, and the auxiliary rod is fixedly connected to the push block.

[0012] Taking the collecting frame as the benchmark: the area between the scraper and the fixed plate is the first shielding area, the area between the upper surface of the push block and the fixed plate and the sludge temporary storage area, the area between the fixed plate and the blocking plate is the first flow area, and the area between the blocking plate and the filter structure is the filter flow area.

[0013] As a preferred technical solution of the present invention, the upper side of the push block is a first inclined surface, and the first inclined surface is located at the bottom of the sludge temporary storage area. When the telescopic assembly drives the push block to rise to the highest point position: the lowest point position of the first inclined surface is aligned with the highest point position of the scraper.

[0014] As a preferred technical solution of the present invention, the filtering structure adopts a stainless steel filter mesh structure.

[0015] As a preferred technical solution of the present invention, the driving assembly includes a limiting rod and a threaded rod arranged inside the sedimentation tank body, one end of the threaded rod is connected to a driving motor fixedly arranged on the outside of the sedimentation tank body, and a first connecting rod and a second connecting rod are fixedly connected to the surface of the collecting frame, the first connecting rod is threadedly connected to the threaded rod, and the second connecting rod is movably connected to the limiting rod.

[0016] As a preferred technical solution of the present invention, a moving opening for the movement of the fixed plate is opened on the top of the collection frame, wherein, when the fixed plate is at the lowest point of its vertical travel range: the upper end of the fixed plate protrudes from the moving opening, and a rubber scraper is arranged on the inside of the moving opening to be in extrusion contact with the fixed plate.

[0017] As a preferred technical solution of the present invention, the blocking plate is arranged to be tilted downward, wherein the horizontal height of one side of the blocking plate connected to the top of the push block is higher than the horizontal height of one side of the blocking plate adjacent to the fixed plate.

[0018] The present invention also provides a dynamic cleaning method for an industrial wastewater dephosphorization sedimentation tank, comprising the following steps:

[0019] S1. Add chemical agents into the sedimentation tank to separate the phosphorus in the wastewater and form precipitates. The precipitates will accumulate at the bottom of the sedimentation tank.

[0020] S2. When it is necessary to clean the sediment, start the driving motor, and a threaded rod is provided for rotation inside the sedimentation tank body. The output end of the driving motor is fixedly connected to the threaded rod, and a first connecting rod and a second connecting rod are fixedly provided on the top of the collecting frame. The first connecting rod is threadedly connected to the threaded rod, and a limit rod is fixedly provided inside the sedimentation tank body. The second connecting rod is slidably connected to the limit rod. The driving motor drives the collecting frame to move toward the collecting trough. When the collecting frame moves, it will drive the scraper to move. When the scraper moves, it can scrape the sediment at the bottom of the sedimentation tank body. As the sediment scraped by the scraper gradually increases, part of the sediment will pass over the scraper and fall into the collecting frame. The sediment and water that pass over the scraper will first pass through the first shielding area and then fall into the sludge temporary storage area. Most of the sediment will be retained in the sludge temporary storage area under the shield of the blocking plate. The water flows along the first flow area into the filtration flow area. A small amount of sediment passes through the first flow area and the filtration flow area along with the water flow direction and is blocked by the filtration structure.

[0021] S3. When the collecting frame moves to the edge of the collecting trough, the telescopic assembly drives the fixed plate to move upward, and the fixed plate will move out of the collecting frame from the moving opening. During the movement of the fixed plate, the moving opening will scrape off the sediment adhering to the surface of the fixed plate and drop it onto the surface of the pushing block. The upward movement of the pushing block will push the sediment accumulated in the collecting frame out from the scraper, and the scraper will push the sediment into the collecting trough together. During the upward movement of the pushing block, the cleaning brush will follow the pushing block to scrape off the sediment on the surface of the filter structure. The scraped sediment will slide down along the blocking plate to the sludge temporary storage area, slide along the first inclined surface, and be discharged from the upper side of the scraper.

[0022] S4. After all the sediment is scraped into the collection tank, start the sludge suction pump, and the collection pipe will suck all the sediment and discharge it from one side of the sludge suction pump.

[0023] The present invention provides a dynamic cleaning device and method for an industrial wastewater dephosphorization sedimentation tank, which has the following beneficial effects:

[0024] The present invention uses the joint action of the pushing block, the fixed plate and the blocking plate. When too much sediment passes over the scraper, the sediment and water will enter the collection frame together. Under the joint obstruction of the fixed plate and the blocking plate, the water will slow down when flowing in the collection frame. When the water flows through the filter structure, it will not drive too much sediment to flow through the filter structure. In the process of the pushing block moving upward, the sediment accumulated on the surface of the pushing block will be pushed out, and the pushing block will drive the cleaning brush to move upward when moving upward. The cleaning brush moves upward and brushes the sediment attached to the filter structure to keep the filter structure unobstructed. In this way, not only can the sediment that passes over the scraper be stored, so that the sediment will not fall on the side that is scraped clean, but also the collection frame and the scraper will not disturb the water in the sedimentation tank body too much when moving, causing the water body to be turbid, and at the same time, it will not increase too much water resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the sedimentation tank body of the present invention.

[0028] Figure 4 It is a schematic diagram of the enlarged structure of the collection frame of the present invention.

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of the collection frame of the present invention.

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the collecting frame and the fixing plate of the present invention.

[0031] In the figure: 1. Sedimentation tank body, 11. Sedimentation area, 12. Filtration structure; 2. Collection tank; 3. Mud suction pump; 31. Collection pipe; 4. Drive assembly, 41. Limit rod, 42. Threaded rod, 43. Drive motor, 44. First connecting rod, 45. Second connecting rod; 5. Collection frame, 51. Filtration structure, 52. Telescopic assembly, 53. Telescopic rod, 54. Push block, 541. First inclined plane, 55. Auxiliary rod, 56. Blocking plate, 57. Cleaning brush, 58. Moving port; 6. Scraper, 61. First shielding area, 62. Sludge temporary storage area, 63. First circulation area, 64. Filtration circulation area; 7. Fixed plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] Example 1: The present invention designs a dynamic cleaning device for industrial wastewater dephosphorization sedimentation tank, which mainly includes the following contents:

[0034] Combine Figure 1 、 Figure 2 、 Figure 3 A collecting tank 2 is provided at the bottom of the sedimentation tank body 1, a sludge suction pump 3 is provided on the outside of the sedimentation tank body 1, a collecting pipe 31 is provided at the output end of the sludge suction pump 3, and one end of the collecting pipe 31 extends into the collecting tank 2, a collecting frame 5 is slidingly provided inside the sedimentation tank body 1, the sedimentation tank body 1 is provided with a driving assembly 4 for driving the collecting frame 5 to move, the driving assembly 4 includes a limiting rod 41 and a threaded rod 42 arranged inside the sedimentation tank body 1, one end of the threaded rod 42 is connected to a driving motor 43 fixedly arranged on the outside of the sedimentation tank body 1, a first connecting rod 44 and a second connecting rod 45 are fixedly connected to the surface of the collecting frame 5, the first connecting rod 44 is threadedly connected to the threaded rod 42, and the second connecting rod 45 is movably connected to the limiting rod 41.

[0035] Combine Figure 4 、 Figure 5 、 Figure 6 , taking the collecting frame 5 as a reference: the sedimentation tank body 1 located on one side of the collecting tank 2 is the sedimentation area 11 , and the sedimentation tank body 1 area on the other side of the collecting frame 5 is the filtering structure 51 .

[0036] A scraper 6 is fixedly provided on the side of the collection frame 5 facing the collection trough 2, and a push block 54 is provided inside the collection frame 5. An inclined blocking plate 56 is fixedly connected to the top of the push block 54, and the blocking plate 56 is tilted downward, wherein the horizontal height of the side edge connected to the top of the blocking plate 56 and the push block 54 is higher than the horizontal height of the side edge adjacent to the blocking plate 56 and the fixed plate 7. A filtering structure 51 is provided on the side of the collection frame 5 away from the scraper 6. The filtering structure 51 adopts a stainless steel filter mesh structure, and a cleaning brush 57 in contact with the surface of the filtering structure 51 is fixedly provided on the side of the blocking plate 56 facing the filtering structure 51.

[0037] A telescopic component 52 is fixedly provided in the collecting frame 5, one end of the telescopic component 52 is connected to a telescopic rod 53, one end of the telescopic rod 53 passes through the blocking plate 56 and is fixedly connected to the push block 54, the upper side of the push block 54 is a first inclined surface 541, and the first inclined surface 541 is located at the bottom of the sludge temporary storage area 62. When the telescopic component 52 drives the push block 54 to rise to the highest point position: the lowest point position of the first inclined surface 541 is aligned with the highest point position of the scraper 6.

[0038] A fixed plate 7 is fixedly provided inside the collection frame 5, and an auxiliary rod 55 is fixedly provided at the bottom of the fixed plate 7. The auxiliary rod 55 is fixedly connected to the push block 54. A moving opening 58 for the movement of the fixed plate 7 is opened at the top of the collection frame 5. When the fixed plate 7 is at the lowest point of its vertical stroke range, the upper end of the fixed plate 7 protrudes from the moving opening 58, and a rubber scraper is arranged on the inside of the moving opening 58 to be in extrusion contact with the fixed plate 7.

[0039] Taking the collecting frame 5 as the reference: the first shielding area 61 is between the scraper 6 and the fixed plate 7, the sludge temporary storage area 62 is between the upper surface of the push block 54 and the fixed plate 7, the first flow area 63 is between the fixed plate 7 and the blocking plate 56, and the filter flow area 64 is between the blocking plate 56 and the filter structure 51.

[0040] Example 2: In the present invention, a dynamic cleaning device and method for industrial wastewater dephosphorization sedimentation tank, the specific working principle is as follows:

[0041] First, chemical agents are added into the sedimentation tank body 1 to separate the phosphorus element in the wastewater to form a precipitate, which is accumulated at the bottom of the sedimentation tank body 1 .

[0042] Then, when it is necessary to clean the sediment, start the drive motor 43, and the drive motor 43 drives the collecting frame 5 to move toward the collecting trough 2. When the collecting frame 5 moves, it will drive the scraper 6 to move. When the scraper 6 moves, it can scrape the sediment at the bottom of the sedimentation tank body 1. As the amount of sediment scraped by the scraper 6 gradually increases, some of the sediment will pass over the scraper 6 and fall into the collecting frame 5. The sediment and water that pass over the scraper 6 will first pass through the first blocking area 61, and then fall into the sludge temporary storage area 62. The water flow continues to flow, driving a small amount of sediment to flow through the first flow area 63, and then flow through the filter flow area 64. The water flow flowing to the first flow area 63 and the filter flow area 64 will slow down, and then the water will flow out from the filter structure 51, and the sediment is blocked by the filter structure 51.

[0043] When the collecting frame 5 moves to the edge of the collecting trough 2, the telescopic assembly 52 drives the telescopic rod 53 to move upward, thereby driving the pushing block 54 and the auxiliary rod 55 to move upward. The upward movement of the auxiliary rod 55 will drive the fixed plate 7 to move upward, and the fixed plate 7 will move out of the collecting frame 5 from the moving opening 58. In the process of the movement of the fixed plate 7, the moving opening 58 will scrape the sediment adhered to the surface of the fixed plate 7 and drop it onto the surface of the pushing block 54. The upward movement of the pushing block 54 will push the sediment accumulated in the collecting frame 5 out from the scraper 6, and the scraper 6 will push the sediment into the collecting trough 2 together. In the process of the pushing block 54 moving upward, the cleaning brush 57 will follow the pushing block 54 to move and scrape off the sediment on the surface of the filter structure 51. The scraped sediment will slide down along the blocking plate 56 to the sludge temporary storage area 62, slide along the first inclined surface 541, and be discharged from the upper side of the scraper 6.

[0044] After all the sediment is scraped into the collecting tank 2 , the sludge suction pump 3 is started, and the collecting pipe 31 sucks all the sediment and discharges it from one side of the sludge suction pump 3 .

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dynamic cleaning device for an industrial wastewater dephosphorization sedimentation tank, comprising a sedimentation tank body (1) and a sludge suction pump (3), wherein a collecting tank (2) is provided below the sedimentation tank body (1), the sedimentation tank body (1) and the sludge suction pump (3) are fixedly connected, a collecting pipe (31) is provided at the output end of the sludge suction pump (3), one end of the collecting pipe (31) extends into the collecting tank (2), and is characterized in that: A collecting frame (5) is slidably provided inside the sedimentation tank body (1), and the sedimentation tank body (1) is provided with a driving assembly (4) for driving the collecting frame (5) to move; Taking the collecting frame (5) as a reference: the sedimentation tank body (1) located on one side of the collecting tank (2) is the sedimentation area (11), and the sedimentation tank body (1) area on the other side of the collecting frame (5) is the filtering structure (51); A scraper (6) is fixedly provided on the side of the collection frame (5) facing the collection tank (2), a push block (54) is provided inside the collection frame (5), a blocking plate (56) is fixedly connected to the top of the pushing block (54), a filtering structure (51) is provided on the side of the collection frame (5) away from the scraper (6), and a cleaning brush (57) in contact with the surface of the filtering structure (51) is fixedly provided on the side of the blocking plate (56) facing the filtering structure (51); A telescopic assembly (52) is fixedly provided in the collection frame (5), one end of the telescopic assembly (52) is connected to a telescopic rod (53), and one end of the telescopic rod (53) passes through the blocking plate (56) and is fixedly connected to the push block (54); A fixing plate (7) is fixedly provided inside the collecting frame (5), an auxiliary rod (55) is fixedly provided at the bottom of the fixing plate (7), and the auxiliary rod (55) is fixedly connected to the push block (54); Taking the collecting frame (5) as a reference: the area between the scraper (6) and the fixed plate (7) is a first shielding area (61), the area between the upper surface of the push block (54) and the fixed plate (7) is a sludge temporary storage area (62), the area between the fixed plate (7) and the blocking plate (56) is a first circulation area (63), and the area between the blocking plate (56) and the filtering structure (51) is a filtering circulation area (64).

2. The dynamic cleaning device for industrial wastewater dephosphorization sedimentation tank according to claim 1, characterized in that: The upper side of the push block (54) is a first inclined surface (541), and the first inclined surface (541) is located at the bottom of the sludge temporary storage area (62). When the telescopic component (52) drives the push block (54) to rise to the highest point, the lowest point of the first inclined surface (541) is aligned with the highest point of the scraper (6).

3. The dynamic cleaning device for industrial wastewater dephosphorization sedimentation tank according to claim 1, characterized in that: The filtering structure (51) adopts a stainless steel filter mesh structure.

4. The dynamic cleaning device for industrial wastewater dephosphorization sedimentation tank according to claim 1, characterized in that: The driving assembly (4) comprises a limiting rod (41) and a threaded rod (42) arranged inside the sedimentation tank body (1); one end of the threaded rod (42) is connected to a driving motor (43) fixedly arranged outside the sedimentation tank body (1); a first connecting rod (44) and a second connecting rod (45) are fixedly connected to the surface of the collecting frame (5); the first connecting rod (44) is threadedly connected to the threaded rod (42); and the second connecting rod (45) is movably connected to the limiting rod (41).

5. The dynamic cleaning device for industrial wastewater dephosphorization sedimentation tank according to claim 1, characterized in that: The top of the collecting frame (5) is provided with a moving opening (58) for the fixed plate (7) to move, wherein when the fixed plate (7) is at the lowest point of its vertical travel range, the upper end of the fixed plate (7) protrudes from the moving opening (58), and a rubber scraper is arranged inside the moving opening (58) to be in extrusion contact with the fixed plate (7).

6. The dynamic cleaning device for industrial wastewater dephosphorization sedimentation tank according to claim 1, characterized in that: The blocking plate (56) is arranged to be tilted downward, wherein the horizontal height of one side of the blocking plate (56) connected to the top of the push block (54) is higher than the horizontal height of one side of the blocking plate (56) adjacent to the fixed plate (7).

7. A dynamic cleaning method for industrial wastewater dephosphorization sedimentation tank, characterized in that: The dynamic cleaning device for industrial wastewater dephosphorization sedimentation tank according to any one of claims 1 to 6 comprises the following steps: S1. Adding chemical agents to the sedimentation tank body (1) to separate phosphorus from the wastewater to form a precipitate, and the formed precipitate is accumulated at the bottom of the sedimentation tank body (1); S2. When the sediment needs to be cleaned, the drive motor (43) is started, and the drive motor (43) drives the collection frame (5) to move toward the collection tank (2). When the collection frame (5) moves, the scraper (6) moves, and when the scraper (6) moves, it scrapes the sediment at the bottom of the sedimentation tank body (1); S2.

1. As the amount of sediment scraped by the scraper (6) gradually increases, part of the sediment passes over the scraper (6) and falls into the collection frame (5). The sediment and water that pass over the scraper (6) first pass through the first shielding area (61), and then the sediment and water enter the sludge temporary storage area (62); S2.

2. Most of the sediment is blocked by the baffle (56) and retained in the sludge temporary storage area (62). The water flows along the first flow area (63) into the filtration flow area (64). S2.

3. A small amount of sediment passes through the first flow area (63) and the filtration flow area (64) along with the water flow direction and is blocked by the filtration structure (51); S3. When the collecting frame (5) moves to the edge of the collecting tank (2), the telescopic assembly (52) drives the fixing plate (7) to move upward; S3.

1. During the movement of the fixed plate (7), the movable opening (58) scrapes off the sediment adhering to the surface of the fixed plate (7) and drops it onto the surface of the push block (54); S3.

2. The push block (54) moves upward to push the sediment accumulated in the collection frame (5) out from the scraper (6), and the scraper (6) pushes the sediment into the collection tank (2); S3.

3. During the upward movement of the push block (54), the cleaning brush (57) moves along with the push block (54) to scrape off the sediment on the surface of the filter structure (51). The scraped sediment slides down along the blocking plate (56) to the sludge temporary storage area (62), slides along the first inclined surface (541), and is discharged from the upper side of the scraper (6); S4. After all the sediment is scraped into the collection tank (2), the sludge suction pump (3) is started, and the collection pipe (31) sucks all the sediment and discharges it from one side of the sludge suction pump (3).

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