Polygonal drum microfiltration apparatus

Abstract

The application discloses a polygonal rotary drum microfiltration device, and relates to the field of water filtration in aquaculture and environmental protection industry. The application can realize multi-stage filtration, and can improve the full filtration efficiency and sealing performance of heavy particles. The application comprises a frame assembly, a rotary drum assembly for connecting an inlet pipe and an outlet pipe to guide the circulation of water, the rotary drum assembly is horizontally arranged on the frame assembly and is driven by a transmission assembly to rotate reciprocatingly along the arranged point, a backwashing assembly is arranged on the outer periphery of the rotary drum assembly to wash clean water into the rotary drum assembly from the outside to the inside, and a backwashing sewage tank assembly is arranged at the bottom of the rotary drum assembly to discharge the sewage after backwashing.

Description

Technical Field

[0001] This application proposes a polygonal rotary drum microfiltration device for circulating water filtration and cleaning, belonging to the water filtration field of aquaculture and environmental protection industries. Background Technology

[0002] Currently, flowing water aquaculture and recirculating aquaculture systems have been widely adopted in the aquaculture industry. Existing microfiltration equipment can improve the aquatic environment and filter out impurities, making it indispensable in aquaculture to ensure water cleanliness. For example, in a 1000 cubic meter water system with a circulation rate of 24 times / day, a stocking density of 30 kg / m³, a daily water exchange rate of 15-20%, a feeding rate of 1-2%, and a temperature of 16-18℃, the particle size distribution in the return water during the circulation process is as follows: particles larger than 60 μm account for 11%-27% of the total particles, particles between 15-60 μm account for 33%-40%, and particles smaller than 15 μm account for 33%-56%.

[0003] Existing microfiltration equipment can filter out most small particles, but larger, heavier particles, such as grains of rice or millet, cannot be carried to the backwash drain by the rotating drum because the filter screen lacks a storage groove. These particles remain in the microfilter, becoming a source of contamination, and require regular manual cleaning, significantly increasing the workload of subsequent cleaning. Furthermore, the filter screens and their mounting structures in existing microfilters are generally not planar, making it difficult to ensure a proper seal. Water can seep out from the drum wall during filtration, thus requiring improvement in filtration efficiency.

[0004] In view of the above, this patent application is hereby filed. Summary of the Invention

[0005] The polygonal drum microfiltration device described in this utility model aims to solve the problems existing in the prior art by proposing a novel planar frame drum-type microfiltration structure, so as to improve the overall filtration efficiency and sealing performance for filtration of heavier particles while achieving multi-stage filtration.

[0006] To achieve the above design objectives, the polygonal drum microfiltration device includes: Framework components, The drum assembly is used to connect the inlet and outlet water areas to filter particulate matter in the circulating water. The drum assembly is horizontally mounted on the frame assembly and driven by the transmission assembly to rotate along the axis. A backwashing assembly is located on the outer periphery of the drum assembly to flush cleaning water in reverse from the outside to the inside. The backwash sludge discharge tank assembly is located inside the drum assembly to discharge the backwashed wastewater; The frame assembly has an integral box structure. A side sealing plate is fixed on the side of the frame. A main shaft welding plate and a front sealing plate are fixedly connected to the front and rear ends of the frame, respectively. The main shaft is horizontally mounted on the main shaft welding plate. A through hole is provided on the front sealing plate to accommodate and support the sealing assembly, and a sealing ring is installed along the circumference of the through hole; An array of first and second roller components is provided on the frame component for rotating the support drum component.

[0007] Furthermore, a second hole is provided on the front sealing plate, a first hole is provided on the sealing ring, a sealing tip is formed at the inner end of the sealing ring, a sealing ring fixing plate is connected to the inner side of the sealing ring, and a second threaded hole is provided on the sealing ring fixing plate; the sealing ring is fixedly connected to the second hole distributed circumferentially on the front sealing plate by bolts passing through the second hole, the first hole and the second threaded hole in sequence.

[0008] Furthermore, the drum assembly includes a hollow drum welding assembly with an overall cylindrical structure. An array of filter screen assemblies, supported and fixed by the filter screen frame welding assembly, is covered and connected to the cylindrical body of the drum welding assembly. The drum welding assembly is composed of a front roller, a front flange located on the circumference of the port of the front roller, a rear flange ring located at the rear, and an array of filter screen frame welding assemblies connected horizontally between the front flange and the rear flange ring, which are sequentially welded to form a cylindrical polyhedron. An annular front roller groove is provided at the bottom of the port of the front roller. The rollers of the first roller assembly and the second roller assembly of the frame assembly are respectively rolled and nested in the front roller groove, and the sealing tip is in close contact with the inner wall of the front roller on one side of the front roller groove.

[0009] Furthermore, a rear flange ring is connected to the rear edge of the drum welding assembly cylinder, a toothed ring is fitted on the outer circumference of the rear flange ring, and a central ring is set concentrically with the rear flange ring. The main rotating shaft passes through the central ring via a bearing. A series of square tubes are welded between the rear flange ring and the central ring, and a blocking plate is fixedly connected between two adjacent sets of square tubes.

[0010] Furthermore, the filter frame welding assembly is composed of grooved plates on both sides and corner plates at both ends, and a number of U-shaped plates are fixedly connected between the grooved plates on both sides by bolts.

[0011] Furthermore, the filter assembly includes a filter frame, with a highly elastic sealing gasket connected to one side of the filter frame, the sealing gasket contacting the corresponding mating plane of the filter frame welding assembly; a filter is connected to the other side of the filter frame, and an array of third holes are provided on the filter frame, with bolts inserted into the third holes for fixing with nuts.

[0012] Furthermore, the backwash assembly includes a backwash seat fixedly connected to the frame assembly, a backwash pump fixedly installed on the backwash seat, the backwash pump being connected to a backwash inlet pipe and two sets of parallel and interconnected backwash pipes, a ball valve for adjusting the flow rate being installed at the end of one set of backwash pipes, and several backwash ports being provided on each set of backwash pipes.

[0013] Furthermore, the backflushing sludge tank assembly is composed of a backflushing flange, a backflushing sludge pipe, a backflushing sludge tank, and a backflushing auxiliary plate welded together in sequence. The backflushing auxiliary plate is fixed to the main shaft by connecting the first threaded hole through a backflushing auxiliary bolt. A recessed backflushing sludge tank welding clip is provided in the backflushing sludge pipe, and the backflushing sludge tank welding clip is embedded in the V-shaped groove of the frame assembly. The backflushing sewage is received by the backflushing sludge tank and finally discharged through the backflushing flange.

[0014] Furthermore, the transmission assembly includes a transmission base fixed to the frame assembly, a transmission reduction motor is mounted on the transmission base, and a transmission gear meshing with a transmission gear ring is sleeved on the output end of the transmission reduction motor.

[0015] In summary, the polygonal drum microfiltration device described in this application has the advantage of being able to truly achieve different diameter gauges. The filter treats all particles, significantly improving filtration efficiency while ensuring sealing performance. It maximizes the filtration rate and performance per unit volume of water. Furthermore, the polygonal drum structure composed of a planar frame features excellent welding technology, good interchangeability, and the filter assembly structure is compatible with products of different diameters or lengths. Attached Figure Description

[0016] The embodiments will now be further described with reference to the following figures; Figure 1 This is an isometric view of the polygonal drum microfiltration device described in this application; Figure 2 yes Figure 1 A magnified view of a portion at point A; Figure 3 This is an isometric schematic diagram of the frame components; Figure 4 This is a top view of the frame components; Figure 5 yes Figure 4 Sectional view at point B; Figure 6 yes Figure 5 A partial sectional view at point C; Figure 7 yes Figure 3 A partial sectional view at point D; Figure 8 This is an isometric schematic diagram of the first roller assembly; Figure 9 This is an isometric schematic diagram of the second roller assembly; Figure 10 This is a cross-sectional view of the axis of the drum assembly; Figure 11 yes Figure 10 A partial sectional view at point E; Figure 12 yes Figure 10 A partial sectional view at point F; Figure 13 This is an exploded view of the drum welding assembly; Figure 14 This is an isometric side view of the filter frame welding assembly; Figure 15 This is an isometric side view of the filter assembly; Figure 16 This is a top view of the filter assembly; Figure 17 yes Figure 16 G-direction cross-sectional view; Figure 18 This is an exploded view of the drum assembly; Figure 19 yes Figure 18 H-axis magnified view; Figure 20 This is an isometric side view of the backwash assembly; Figure 21 This is a side view of the backflushing sump assembly; Figure 22 This is an isometric side view of the backflushing sump assembly; Figure 23 This is an isometric side view of the transmission assembly; Figure 24 yes Figure 1 A cross-sectional view along the vertical axis; Figure 25 yes Figure 24 A magnified view of section I.

[0017] In the above figures, the components are: frame assembly 10, frame 11, side sealing plate 12, front sealing plate 13, first bracket 14, second bracket 15, third bracket 16, fourth bracket 17, fifth bracket 18, first roller assembly 19, first roller bracket 20, first roller shaft 21, roller 22, second roller assembly 23, second roller bracket 24, second roller shaft 25, main shaft welding plate 26, main shaft 27, first threaded hole 28, sealing ring 29, sealing ring fixing plate 30, second threaded hole 31, first hole 32, second hole 33, and sealing tip 34. Drum assembly 40, drum welding assembly 41, front drum 42, front drum groove 43, front flange 44, rear flange ring 45, square tube 46, center ring 47, filter screen frame welding assembly 48, groove plate 49, angle plate 50, U-shaped plate 51, bolt 52, filter screen assembly 53, sealing gasket 54, filter screen frame 55, filter screen 56, third hole 57, toothed ring 58, blocking plate 59; Backwash assembly 70, backwash seat 71, backwash pump 72, backwash inlet pipe 73, backwash pipe 74, backwash port 75, ball valve 76; Backflush drain assembly 80, backflush flange 81, backflush drain pipe 82, backflush drain welding clip 83, backflush drain 84, backflush auxiliary plate 85, backflush auxiliary bolt 86; Transmission assembly 90, transmission base 91, transmission geared motor 92, transmission gear 93.

[0018] In the diagram, J represents the filter storage trench, K represents large particles, L represents the first backwash section, and M represents the second backwash section. Detailed Implementation

[0019] This application proposes a polygonal rotary drum microfiltration device for recirculating aquaculture. To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, further detailed descriptions are provided below. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the application.

[0020] Example 1, such as Figures 1 to 25 As shown, the polygonal drum microfiltration device includes: Framework component 10, The drum assembly 40 is used to connect the sewage area and the clean water area to filter particulate matter in the circulating water. The drum assembly 40 is horizontally mounted on the frame assembly 10 and driven by the transmission assembly 90 to rotate along the axis. A backwash assembly 70 is disposed on the outer periphery of the drum assembly 40 for backwashing cleaning water from the outside to the inside. The backwash drain assembly 80 is located at the bottom of the drum assembly 40 to discharge the backwashed wastewater.

[0021] The frame assembly 10 can be integrally installed in the construction pit. It includes a frame 11, which is formed by welding a first support 14, a second support 15, a third support 16, a fourth support 17, and a fifth support 18 in sequence to form an integral box structure. A side sealing plate 12 is fixed on the side of the frame 11. A main shaft welding plate 26 and a front sealing plate 13 are fixedly connected to the front and rear ends of the frame 11, respectively. The main shaft 27 is horizontally mounted on the main shaft welding plate 26. A first threaded hole 28 is provided on the main shaft 27. A second hole 33 is provided on the front sealing plate 13, and a sealing ring 29 is installed along the circumference of the second hole 33. Specifically, a second hole 33 is provided on the front sealing plate 13, a first hole 32 is provided on the sealing ring 29, a sealing tip 34 is formed at the inner end of the sealing ring 29, a sealing ring fixing plate 30 is connected to the inner side of the sealing ring 29, and a second threaded hole 31 is provided on the sealing ring fixing plate 30. The sealing ring 29 is fixedly connected to the second hole 33 distributed circumferentially on the front sealing plate 13 by bolts passing through the second hole 33, the first hole 32 and the second threaded hole 31 in sequence. The side sealing plate 12 of the aforementioned frame component 10 can be sealed by external foundation cement. Combined with the isolation effect of the front sealing plate 13 and the sealing ring 29, the sewage area can be isolated from the clean water area, preventing sewage from entering. Figure 1 The left front part.

[0022] An array of first roller assemblies 19 is provided on the first bracket 14, and an array of second roller assemblies 23 is provided on the second bracket 15; The first roller assembly 19 includes a first roller bracket 20, on which a first roller shaft 21 is horizontally mounted, and the roller 22 is rotatably mounted on the first roller shaft 21. The second roller assembly 23 includes a second roller bracket 24, on which a second roller shaft 25 is horizontally mounted, and the roller 22 is rotatably mounted on the second roller shaft 25. The drum assembly 40 includes a hollow drum welding assembly 41 with an overall cylindrical structure. An array of filter screen assemblies 53, which are supported and fixed by the filter screen frame welding assembly 48, are covered and connected on the cylindrical body of the drum welding assembly 41. The rotary drum welding assembly 41 is formed by sequentially welding a front drum 42, a front flange 44 located on the port circumference of the front drum 42, a rear flange ring 45 located at the rear, and an array of filter frame welding assemblies 48 connected horizontally between the front flange 44 and the rear flange ring 45 to form a cylindrical polyhedron. An annular front roller groove 43 is provided at the bottom of the port of the front roller 42. The rollers 22 of the first roller assembly 19 and the second roller assembly 23 of the frame assembly 10 are respectively rolled and nested in the front roller groove 43 to restrict the overall axial movement of the drum assembly 40. At the same time, the sealing tip 34 is in close contact with the inner wall of the front roller 42 on one side of the front roller groove 43. A rear flange ring 45 is connected to the rear edge of the drum welding assembly 41. A toothed ring 58 is fitted on the outer circumference of the rear flange ring 45. A central ring 47 is arranged concentrically with the rear flange ring 45. The main rotating shaft 27 passes through the central ring 47 via a bearing. An array of square tubes 46 is welded between the rear flange ring 45 and the central ring 47. A blocking plate 59 is fixedly connected between two adjacent sets of square tubes 46. Through the isolation of the blocking plate 59, the outside of the drum assembly 40 ( Figure 1 The clean water area (right rear part) is separated from the inside of the drum assembly 40 and the sewage area (left front part); The filter frame welding assembly 48 is composed of grooved plates 49 on both sides and corner plates 50 at both ends welded together. A series of U-shaped plates 51 are fixedly connected between the grooved plates 49 on both sides by bolts 52. All plates connected by bolts 52 have flat contact surfaces to facilitate mutual sealing connection. The filter assembly 53 includes a filter frame 55. A highly elastic sealing gasket 54 is connected to one side of the filter frame 55. The sealing gasket 54 contacts the corresponding mating plane of the filter frame welding assembly 48 to improve the sealing effect and facilitate replacement and maintenance. A filter 56 is connected to the other side of the filter frame 55. An array of third holes 57 are provided on the filter frame 55. Bolts 52 can be inserted into the third holes 57 for fixing with nuts. The backwash assembly 70 includes a backwash base 71 fixedly connected to the frame assembly 10 (specifically, the fourth bracket 17), and a backwash pump 72 fixedly installed on the backwash base 71. The backwash pump 72 is connected to the clean water area (i.e., Figure 1 The backwash inlet pipe 73 (right rear part) and two sets of parallel and interconnected backwash pipes 74 are provided. A ball valve 76 for adjusting the flow rate is installed at the end of one set of backwash pipes 74. Several backwash ports 75 are provided on each set of backwash pipes 74. In the two sets of backwash pipes 74, the one closer to the backwash pump 72 is the first backwash section, while the one farther away from the backwash pump 72 is the second backwash section. The backflush drain assembly 80 is composed of a backflush flange 81, a backflush drain pipe 82, a backflush drain 84, and a backflush auxiliary plate 85 welded together in sequence. The backflush auxiliary plate 85 is fixed to the main rotating shaft 27 by connecting the first threaded hole 28 through the backflush auxiliary bolt 86 (this shaft does not actually rotate, but supports the rotation of the drum assembly 40). A recessed backflushing drain groove welding clip 83 is provided in the backflushing drain pipe 82, and the backflushing drain groove welding clip 83 is embedded in the V-shaped groove of the frame component 10 (specifically the fifth bracket 18); The wastewater after backflushing is received by the backflushing drain tank 84 and finally discharged through the backflushing flange 81; The transmission assembly 90 includes a transmission base 91 fixed to the frame assembly 10 (specifically the third bracket 16), a transmission reduction motor 92 is provided on the transmission base 91, and a transmission gear 93 that meshes with the transmission gear ring 58 is sleeved on the output end of the transmission reduction motor 92.

[0023] Under normal filtration operation, the drum assembly 40, driven by the transmission reduction motor 92, can move along... Figure 24 Rotate counterclockwise in the middle; When there are many contaminants inside the drum assembly 40, the wastewater is flushed away by the combined action of the drive reduction motor 92 and the backwash pump 72. Figure 1 The pollutants, which are collected inside the filter assembly 53, are flushed back into the backwash drain 84 from the left front to the right rear and through the sealing ring 29 into the drum assembly 40, and then discharged through the backwash drain pipe 82.

[0024] Because the filter assembly 53 has a storage groove as shown at point J in the figure, the function of this storage groove is to store large particles K in the groove, which are only released when the drum assembly 40 rotates counterclockwise. Figure 25 When in the upper position, the gravity direction of the large particles K is unrestrained and they are flushed by the water flow of the first backwash section L and the second backwash section M, and together with other particulate matter, they are flushed into the backwash drain tank 84, and finally discharged through the backwash flange 81 and the backwash drain pipe 82.

[0025] In summary, the embodiments shown in the accompanying drawings are merely preferred solutions for achieving the objectives of this utility model. Those skilled in the art can draw inspiration from this and directly derive other alternative structures that conform to the design concept of this utility model. Other structural features derived therefrom should also fall within the scope of the solutions described in this utility model.

Claims

1. A polygonal rotary drum microfiltration device, characterized in that: Including framework components, The drum assembly is used to connect the inlet and outlet water areas to filter particulate matter in the circulating water. The drum assembly is horizontally mounted on the frame assembly and driven by the transmission assembly to rotate along the axis. A backwashing assembly is located on the outer periphery of the drum assembly to flush cleaning water in reverse from the outside to the inside. The backwash drain assembly is located at the bottom of the drum assembly to discharge the backwashed wastewater. The frame assembly has an integral box structure. A side sealing plate is fixed on the side of the frame. A main shaft welding plate and a front sealing plate are fixedly connected to the front and rear ends of the frame, respectively. The main shaft is horizontally mounted on the main shaft welding plate. A through hole is provided on the front sealing plate to accommodate and support the sealing assembly, and a sealing ring is installed along the circumference of the through hole; An array of first and second roller components is provided on the frame component for rotating the support drum component.

2. The polygonal rotary drum microfiltration device according to claim 1, characterized in that: A second hole is provided on the front sealing plate, and a first hole is provided on the sealing ring. A sealing tip is formed at the inner end of the sealing ring. A sealing ring fixing plate is connected to the inner side of the sealing ring, and a second threaded hole is provided on the sealing ring fixing plate. The sealing ring is fixedly connected to the second hole distributed circumferentially on the front sealing plate by bolts passing through the second hole, the first hole and the second threaded hole in sequence.

3. The polygonal rotary drum microfiltration device according to claim 2, characterized in that: The drum assembly includes a hollow drum welding assembly with an overall cylindrical structure. An array of filter screen assemblies, supported and fixed by the filter screen frame welding assembly, are covered and connected to the cylindrical body of the drum welding assembly. The rotary drum welding assembly is composed of a front drum, a front flange located on the port circumference of the front drum, a rear flange ring located at the rear, and an array of filter screen frame welding assemblies connected horizontally between the front flange and the rear flange ring, which are sequentially welded into a cylindrical polyhedron. An annular front roller groove is provided at the bottom of the port of the front roller. The rollers of the first roller assembly and the second roller assembly of the frame assembly are respectively nested in the front roller groove, and the sealing tip is in close contact with the inner wall of the front roller on one side of the front roller groove.

4. The polygonal rotary drum microfiltration device according to claim 3, characterized in that: A rear flange ring is connected to the rear edge of the drum welding assembly cylinder. A toothed ring is fitted on the outer circumference of the rear flange ring. A central ring is set with the rear flange ring at the same center. The main rotating shaft passes through the central ring via a bearing. A set of square tubes is welded between the rear flange ring and the central ring. A blocking plate is fixedly connected between two adjacent sets of square tubes.

5. The polygonal rotary drum microfiltration device according to claim 3, characterized in that: The filter frame welding assembly consists of grooved plates on both sides and corner plates at both ends, and a number of U-shaped plates are fixedly connected between the grooved plates on both sides by bolts.

6. The polygonal rotary drum microfiltration device according to claim 3, characterized in that: The filter assembly includes a filter frame, with a highly elastic sealing gasket connected to one side of the filter frame. The sealing gasket contacts the corresponding mating plane of the filter frame welding assembly. A filter screen is connected to the other side of the filter frame, and an array of third holes are provided on the filter frame. Bolts are inserted into the third holes for fixing with nuts.

7. The polygonal rotary drum microfiltration device according to claim 1, characterized in that: The backwash assembly includes a backwash seat fixedly connected to the frame assembly, a backwash pump fixedly installed on the backwash seat, the backwash pump connected to a backwash inlet pipe and two sets of parallel and interconnected backwash pipes, a ball valve for adjusting the flow rate installed at the end of one set of backwash pipes, and several backwash ports provided on each set of backwash pipes.

8. The polygonal rotary drum microfiltration device according to claim 1, characterized in that: The backflush drain assembly is composed of a backflush flange, a backflush drain pipe, a backflush drain trough, and a backflush auxiliary plate welded together in sequence. The backflush auxiliary plate is fixed to the main shaft by connecting the first threaded hole through a backflush auxiliary bolt. The backflushing drain pipe is equipped with a recessed backflushing drain trough welding clip, which is embedded in the V-groove of the frame component; the backflushing sewage is received by the backflushing drain trough and finally discharged through the backflushing flange.

9. The polygonal rotary drum microfiltration device according to claim 1, characterized in that: The transmission assembly includes a transmission base fixed to the frame assembly, a transmission reduction motor is mounted on the transmission base, and a transmission gear meshing with a transmission gear ring is sleeved on the output end of the transmission reduction motor.

Images