A disk filter for sewage treatment

Abstract

The present invention belongs to the technical field of separation and filtration, and discloses a disk filter for sewage treatment, including a base; a water inlet device; a discharging device; a filter housing; a filtering device; an auxiliary driving device and a scraping device. By adjusting the lengths of the second hydraulic rod and the third hydraulic rod, the clamping distances of the first scraper and the second scraper on the arc-shaped filter plate on the Z-shaped block can be adjusted respectively. When the second hydraulic rod shortens its stroke and the third hydraulic rod increases its stroke, the distance between the first scraper and the second scraper decreases, and the arc-shaped filter plate is cleaned to the greatest extent. When the second hydraulic rod increases its stroke and the third hydraulic rod shortens its stroke, the distance becomes larger, and the scraping device does not clean the arc-shaped filter plate. During the movement of the hydraulic rod, the spring will play an auxiliary abutting role, solving the problem that the scraper installed at a fixed distance cannot clean the disk filter elements at different positions in time, resulting in poor filtering effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of separation and filtration, and specifically relates to a disk filter for sewage treatment. Background Art

[0002] Sewage treatment refers to the process of purifying sewage to meet the water quality requirements for discharging it into a certain water body or reusing it. Sewage treatment is widely applied in various fields such as construction, agriculture, medical treatment, and catering. Among them, disk filters are used for filtering particulate and crystalline sewage.

[0003] The disk filter separates the slurry into solid and liquid by variable-speed stirring. It mainly includes a filter shell, a filtering device, and a scraping device. The disk-shaped filtering device captures the sewage containing particles in the filter shell and adheres it to the filter sheet. Then, the impurities are peeled off from the disk filter sheet by a scraper, and the cleaned sewage is discharged, thereby achieving the effect of clean filtration. However, since the disks are evenly arranged and distributed in the filter shell, the number of impurities contacted and captured by each filter sheet is different. This will cause the scraper installed at a fixed distance to be unable to clean the disk filter sheets at different positions in time, resulting in poor filtration effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a disk filter for sewage treatment to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A disk filter for sewage treatment, including a base, an inlet device is fixedly installed at the middle position of the base, and further includes a disk linkage filtering mechanism, which includes a discharging device. The discharging device is fixedly installed on the right side of the inlet device. A filter shell is fixedly installed on the top of the base. A filtering device is rotatably installed inside the filter shell, and an auxiliary driving device is fixedly installed on the left side of the filtering device.

[0006] A scraping device is fixedly installed on the right side of the filtering device. The scraping device includes a Z-shaped block. A plurality of guiding blocks are fixedly installed at the bottom of the Z-shaped block. A plurality of first scrapers are movably installed at the top of the Z-shaped block. A second hydraulic rod is installed through the right sides of the plurality of first scrapers. A plurality of second scrapers are movably installed on the right sides of the plurality of first scrapers. A third hydraulic rod is installed through the right sides of the plurality of second scrapers. Spring is fixedly connected to the telescopic ends of both the second hydraulic rod and the third hydraulic rod.

[0007] Preferably, the outer edges of the telescopic ends of the plurality of first scrapers are fixedly connected to the outer edges of the telescopic ends of the second hydraulic rod, and the outer edges of the telescopic ends of the plurality of second scrapers are fixedly connected to the outer edges of the telescopic ends of the third hydraulic rod.

[0008] Preferably, the base includes four support rods. At the top of the four support rods, a trapezoidal frame is fixedly installed. On the left side of the top of the trapezoidal frame, a U-shaped pipe groove is fixedly connected. On the left side of the U-shaped pipe groove, an overflow pipe is fixedly connected. The spring is elastically connected to the top of the trapezoidal frame.

[0009] Preferably, the water inlet device includes a water inlet pipe. The water inlet pipe is fixedly installed at the middle position of the two support rods. At the top of the water inlet pipe, a connecting pipe is fixedly connected. The other end of the connecting pipe is fixedly connected to a compressor. On the back of the water inlet pipe, two bent pipes are fixedly connected.

[0010] Preferably, the discharging device includes two longitudinal rods. The two longitudinal rods are fixedly installed on the right side of the support rods. At the middle position of the two longitudinal rods, a hopper is movably hinged. On the outer sides of the two longitudinal rods, eccentric wheels are rotatably installed. The two eccentric wheels are fixedly connected to the hopper. On the outer sides of the two eccentric wheels, connecting blocks are movably hinged. On the left side of the two connecting blocks, a U-shaped rod is movably hinged. On the left side of the U-shaped rod, a first hydraulic rod is fixedly connected. The telescopic end of the first hydraulic rod is fixedly connected to a cross plate. The cross plate is fixedly installed at the bottom of the trapezoidal frame.

[0011] Preferably, the filter housing includes a housing. On the right side of the housing, two feed pipes are fixedly installed. At the bottom of the housing, a discharge pipe is fixedly connected. Inside the discharge pipe, a valve plate is rotatably installed. Inside the housing, multiple arc-shaped grooves are fixedly installed. Multiple circular holes are opened in the multiple arc-shaped grooves.

[0012] Preferably, the filtering device includes a water inlet ring. The water inlet ring is fixedly installed at the top right side of the housing. The water inlet ring is fixedly connected to the two bent pipes. Multiple L-shaped pipes are annularly distributed on the outer edge of the water inlet ring. Multiple spray heads are installed on the outer edges of the multiple L-shaped pipes. On the left side of the water inlet ring, a rotating shaft is rotatably installed. Multiple rings are fixedly connected to the outer edge of the rotating shaft. Multiple bolts are inserted into the multiple rings. Three groups of arc-shaped filter plates are annularly installed on the multiple rings through the bolts. The left end of the rotating shaft is fixedly connected to a first motor. The first motor is fixedly installed at the top of the trapezoidal frame.

[0013] Preferably, the auxiliary driving device includes a second motor. The output shaft of the second motor is fixedly connected to a gear set. A rotating rod is inserted into the gear set. Multiple fixing blocks are movably sleeved on the outer edge of the rotating rod. The gear set and the multiple fixing blocks are all fixedly installed at the top of the trapezoidal frame. Rotating blocks are fixedly connected to both ends of the rotating rod. Straight rods are movably hinged to the outer sides of the two rotating blocks. Ratchet rings are movably hinged to the right sides of the two straight rods. The left ratchet ring is fixedly connected to the outer edge of the water inlet ring. The right ratchet ring is fixedly connected to the rotating shaft.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By installing an adjustable scraping device in the present invention, when the stroke of the second hydraulic rod is shortened and the stroke of the third hydraulic rod is increased, the distance between the first scraper and the second scraper is reduced, thereby cleaning the arc-shaped filter plate to the greatest extent. When the stroke of the second hydraulic rod is increased and the stroke of the third hydraulic rod is shortened, the distance becomes larger, and the scraping device will not clean the arc-shaped filter plate. During the movement of the second hydraulic rod and the third hydraulic rod, the spring will play an auxiliary abutting role, solving the problem that the scraper installed at a fixed distance cannot clean the disk filter elements at different positions in time, resulting in poor filtering effect.

[0016] 2. Through the newly designed swingable discharging device in the present invention, the scraped impurities will pass through the gap between the Z-shaped block and the guiding block and then fall into the discharging device. At this time, the first hydraulic rod makes a reciprocating motion. The first hydraulic rod will push the connecting block and the eccentric wheel through the U-shaped rod to drive the hopper to make a reciprocating swinging motion in the two longitudinal rods, thus facilitating the cleaning of the impurities on the inner wall of the hopper and solving the problem that due to the moisture contained in the impurities, they may adhere to the inner wall of the hopper, resulting in difficult feeding.

[0017] 3. By installing an auxiliary driving device in the present invention, during the rotation of the filtering device, if too many impurities adhere to the arc-shaped filter plate, the resistance of the first motor to rotate will become larger. At this time, the auxiliary driving device is started, and the second motor of the auxiliary driving device rotates. The power is transmitted to the rotating rod through the gear set. The rotating rod will push the ratchet ring clockwise through the connecting rod structure formed by the rotating block and the straight rod. The ratchet ring will exert an auxiliary torque on the rotating shaft, thereby reducing the burden on the first motor, increasing the rotation speed, and further improving the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is of the present invention Figure 1 a schematic enlarged view of the structure at A in;

[0020] Figure 3 is a left side view of the overall structure of the present invention;

[0021] Figure 4 is of the present invention Figure 3 a schematic enlarged view of the structure at B in;

[0022] Figure 5 is a right side view of the overall structure of the present invention;

[0023] Figure 6 is a bottom view of the overall structure of the present invention;

[0024] Figure 7 Structural schematic diagram of the water inlet device of the present invention;

[0025] Figure 8 Structural schematic diagram of the discharging device of the present invention;

[0026] Figure 9 Structural schematic diagram of the filter housing of the present invention;

[0027] Figure 10 Structural schematic diagram of the right side of the scraping device of the present invention;

[0028] Figure 11 Structural schematic diagram of the left side of the scraping device of the present invention;

[0029] Figure 12 Structural schematic diagram of the filtering device of the present invention;

[0030] Figure 13 For the present invention Figure 12 Enlarged schematic diagram of the structure at position C in;

[0031] Figure 14 Structural schematic diagram of the auxiliary driving device of the present invention.

[0032] In the figure: 1, base; 2, water inlet device; 3, discharging device; 4, filter housing; 5, scraping device; 6, filtering device; 7, auxiliary driving device; 11, support rod; 12, trapezoidal frame; 13, U-shaped pipe groove; 14, overflow pipe; 21, water inlet pipe; 22, connecting pipe; 23, compressor; 24, elbow pipe; 31, vertical rod; 32, hopper; 33, eccentric wheel; 34, connecting block; 35, U-shaped rod; 36, first hydraulic rod; 37, cross plate; 41, housing; 42, feed pipe; 43, discharge pipe; 44, valve plate; 45, arc groove; 46, round hole; 51, Z-shaped block; 52, guiding block; 53, first scraper; 54, second hydraulic rod; 55, second scraper; 56, third hydraulic rod; 57, spring; 61, water inlet ring; 62, L-shaped pipe; 63, nozzle; 64, rotating shaft; 65, ring; 66, bolt; 67, arc-shaped filter plate; 68, first motor; 71, second motor; 72, gear set; 73, rotating rod; 74, fixed block; 75, rotating block; 76, straight rod; 77, thorn wheel ring. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] AsFigures 1 to 14 As shown in the figure, an embodiment of the present invention provides a disk filter for sewage treatment, including a base 1. An inlet device 2 is fixedly installed at the middle position of the base 1. It further includes a disk linkage filtering mechanism, which includes a discharging device 3. The discharging device 3 is fixedly installed on the right side of the inlet device 2. A filtering shell 4 is fixedly installed on the top of the base 1. A filtering device 6 is rotatably installed inside the filtering shell 4. An auxiliary driving device 7 is fixedly installed on the left side of the filtering device 6;

[0035] A scraping device 5 is fixedly installed on the right side of the filtering device 6. The scraping device 5 includes a Z-shaped block 51. A plurality of guiding blocks 52 are fixedly installed at the bottom of the Z-shaped block 51. A plurality of first scraping plates 53 are movably installed at the top of the Z-shaped block 51. A second hydraulic rod 54 penetrates through the right sides of the plurality of first scraping plates 53. A plurality of second scraping plates 55 are movably installed on the right sides of the plurality of first scraping plates 53. A third hydraulic rod 56 penetrates through the right sides of the plurality of second scraping plates 55. Spring 57 is fixedly connected to the telescopic ends of both the second hydraulic rod 54 and the third hydraulic rod 56; The outer edges of the plurality of first scraping plates 53 are fixedly connected to the telescopic end of the second hydraulic rod 54, and the outer edges of the plurality of second scraping plates 55 are fixedly connected to the telescopic end of the third hydraulic rod 56;

[0036] By adjusting the lengths of the second hydraulic rod 54 and the third hydraulic rod 56, the clamping distances of the first scraping plate 53 and the second scraping plate 55 on the Z-shaped block 51 against the arc-shaped filter plate 67 can be adjusted respectively. When the second hydraulic rod 54 shortens its stroke and the third hydraulic rod 56 increases its stroke, the distance between the first scraping plate 53 and the second scraping plate 55 decreases, thereby cleaning the arc-shaped filter plate 67 to the greatest extent. When the second hydraulic rod 54 increases its stroke and the third hydraulic rod 56 shortens its stroke, the distance becomes larger, and the scraping device 5 will not clean the arc-shaped filter plate 67. During the movement of the second hydraulic rod 54 and the third hydraulic rod 56, the spring 57 will play an auxiliary abutting role, solving the problem that the scraping plates installed at a fixed distance cannot clean the disk filter elements at different positions in time, resulting in poor filtering effect.

[0037] Among them, the base 1 includes four support rods 11. A trapezoidal frame 12 is fixedly installed at the top of the four support rods 11. The left side of the top of the trapezoidal frame 12 is fixedly connected with a U-shaped pipe groove 13. A water overflow pipe 14 is fixedly connected to the left side of the U-shaped pipe groove 13. The spring 57 is elastically connected to the top of the trapezoidal frame 12;

[0038] The U-shaped pipe groove 13 will capture the sewage driven by the rotation of the filtering device 6 and re-feed this sewage through the water overflow pipe 14 and the elbow pipe 24, and recycle it into the housing 41 for filtration again;

[0039] Among them, the water inlet device 2 includes a water inlet pipe 21. The water inlet pipe 21 is fixedly installed at the middle position of two support rods 11. A connecting pipe 22 is fixedly connected to the top of the water inlet pipe 21. The other end of the connecting pipe 22 is fixedly connected to a compressor 23. Two elbow pipes 24 are fixedly connected to the back of the water inlet pipe 21;

[0040] Water enters through the water inlet pipe 21. Inside the water inlet pipe 21, the water will be pressurized together with the compressor 23 and the connecting pipe 22 and reach the water inlet ring 61 through the elbow pipes 24;

[0041] Among them, the discharging device 3 includes two longitudinal rods 31. The two longitudinal rods 31 are fixedly installed on the right side of the support rods 11. A hopper 32 is movably hinged at the middle position of the two longitudinal rods 31. Eccentric wheels 33 are rotatably installed on the outer sides of the two longitudinal rods 31. The two eccentric wheels 33 are fixedly connected to the hopper 32. Connecting blocks 34 are movably hinged on the outer sides of the two eccentric wheels 33. A U-shaped rod 35 is movably hinged on the left sides of the two connecting blocks 34. A first hydraulic rod 36 is fixedly connected to the left side of the U-shaped rod 35. The telescopic end of the first hydraulic rod 36 is fixedly connected to a cross plate 37. The cross plate 37 is fixedly installed at the bottom of the trapezoidal frame 12;

[0042] The scraped impurities will pass through the gap between the Z-shaped block 51 and the guiding block 52 and thus fall into the discharging device 3. Since the impurities contain moisture, they may adhere to the inner wall of the hopper 32, resulting in difficult discharging. At this time, the first hydraulic rod 36 makes a reciprocating motion. The first hydraulic rod 36 will push the connecting block 34 and the eccentric wheel 33 through the U-shaped rod 35 to drive the hopper 32 to make a reciprocating swinging motion in the two longitudinal rods 31, thus facilitating the cleaning of the impurities on the inner wall of the hopper 32;

[0043] Among them, the filter housing 4 includes a housing 41. Two feed pipes 42 are fixedly installed on the right side of the housing 41. A discharge pipe 43 is fixedly connected to the bottom of the housing 41. A valve plate 44 is rotatably installed inside the discharge pipe 43. A plurality of arc-shaped grooves 45 are fixedly installed inside the housing 41. A plurality of circular holes 46 are opened in the plurality of arc-shaped grooves 45;

[0044] The plurality of arc-shaped grooves 45 installed inside the housing 41 and the circular holes opened therein will guide the impurities to be captured by the rotating arc-shaped filter plate 67. After the cleaning is completed, the valve plate 44 is opened, and the cleaned water will be discharged through the discharge pipe 43;

[0045] Among them, the filtering device 6 includes a water inlet ring 61, which is fixedly installed at the top right of the housing 41. The water inlet ring 61 is fixedly connected to two bent pipes 24. Multiple L-shaped pipes 62 are annularly distributed on the outer edge of the water inlet ring 61. A plurality of nozzles 63 are installed on the outer edges of the multiple L-shaped pipes 62. A rotating shaft 64 is rotatably installed on the left side of the water inlet ring 61. A plurality of rings 65 are fixedly connected to the outer edge of the rotating shaft 64. A plurality of bolts 66 are inserted into the interiors of the multiple rings 65. Three groups of arc-shaped filter plates 67 are annularly installed on the multiple rings 65 through the bolts 66. The left end of the rotating shaft 64 is fixedly connected to a first motor 68, and the first motor 68 is fixedly installed on the top of the trapezoidal frame 12;

[0046] Start the first motor 68. The first motor 68 will drive the rotating shaft 64 to rotate, thereby driving the rings 65 and the arc-shaped filter plates 67 fixed by the bolts 66 to rotate, capturing impurities in the sewage in the housing 41. The pressurized water is dispersed to six L-shaped pipes 62 through the water inlet ring 61 and sprayed out from the nozzles 63 to stir the water in the filter housing 4, so that it can be moved to the nearest arc-shaped filter plate 67;

[0047] Among them, the auxiliary driving device 7 includes a second motor 71. The output shaft of the second motor 71 is fixedly connected to a gear set 72. A rotating rod 73 is inserted into the interior of the gear set 72. A trapezoidal gear is installed inside the gear set 72, which can convert the rotational force of the vertically installed second motor 71 into a horizontal rotational force. A plurality of fixing blocks 74 are movably sleeved on the outer edge of the rotating rod 73. The gear set 72 and the plurality of fixing blocks 74 are both fixedly installed on the top of the trapezoidal frame 12. Rotating blocks 75 are fixedly connected to both ends of the rotating rod 73. Straight rods 76 are movably hinged to the outer sides of the two rotating blocks 75. The right sides of the two straight rods 76 are movably hinged to a thorn wheel ring 77. The left thorn wheel ring 77 is fixedly connected to the outer edge of the water inlet ring 61, and the right thorn wheel ring 77 is fixedly connected to the rotating shaft 64. The thorn wheel ring 77 only allows the connecting rod structure formed by the rotating block 75 and the straight rod 76 to be engaged when being pushed in a clockwise reciprocating rotation;

[0048] During the rotation of the filtering device 6, if too many impurities adhere to the arc-shaped filter plate 67, it will cause the resistance of the first motor 68 to rotate to increase. At this time, start the auxiliary driving device 7. The second motor 71 of the auxiliary driving device 7 rotates, and the power is transmitted to the rotating rod 73 through the gear set 72. The rotating rod 73 then uses the connecting rod structure formed by the rotating block 75 and the straight rod 76 to push the thorn wheel ring 77 clockwise, and the thorn wheel ring 77 will exert an auxiliary torque on the rotating shaft 64.

[0049] Working principle:

[0050] When sewage needs to be filtered, the sewage first enters the housing 41 through the feed pipe 42. At this time, the water inlet device 2 is started first, and water enters through the water inlet pipe 21. In the water inlet pipe 21, the water will be pressurized together with the compressor 23 and the connecting pipe 22, and reach the water inlet ring 61 through the elbow pipe 24;

[0051] Then the first motor 68 is started. The first motor 68 drives the rotating shaft 64 to rotate, thereby driving the circular ring 65 and the arc-shaped filter plate 67 fixed by bolts 66 to rotate, capturing impurities in the sewage in the housing 41. The pressurized water is dispersed to six L-shaped pipes 62 through the water inlet ring 61 and sprayed out from the nozzles 63 to stir the water in the filter housing 4, so that it can be moved to the nearest arc-shaped filter plate 67;

[0052] During the rotation of the filtering device 6, if too many impurities adhere to the arc-shaped filter plate 67, the resistance of the first motor 68 to rotate will become larger. At this time, the auxiliary driving device 7 is started. The second motor 71 of the auxiliary driving device 7 rotates, and the power is transmitted to the rotating rod 73 through the gear set 72. The rotating rod 73 then uses the connecting rod structure formed by the rotating block 75 and the straight rod 76 to push the thorn wheel ring 77 clockwise, and the thorn wheel ring 77 will exert an auxiliary torque on the rotating shaft 64;

[0053] By adjusting the lengths of the second hydraulic rod 54 and the third hydraulic rod 56, the clamping distances of the first scraper 53 and the second scraper 55 on the Z-shaped block 51 for the arc-shaped filter plate 67 can be adjusted respectively. When the second hydraulic rod 54 shortens its stroke and the third hydraulic rod 56 increases its stroke, the distance between the first scraper 53 and the second scraper 55 decreases, so as to clean the arc-shaped filter plate 67 to the greatest extent. When the second hydraulic rod 54 increases its stroke and the third hydraulic rod 56 shortens its stroke, the distance becomes larger, and the scraping device 5 will not clean the arc-shaped filter plate 67. During the movement of the second hydraulic rod 54 and the third hydraulic rod 56, the spring 57 will play an auxiliary abutting role;

[0054] The scraped impurities will fall into the discharging device 3 through the gap between the Z-shaped block 51 and the guiding block 52. Since the impurities contain moisture, they may adhere to the inner wall of the hopper 32, resulting in difficult discharging. At this time, the first hydraulic rod 36 makes a reciprocating motion. The first hydraulic rod 36 will push the connecting block 34 and the eccentric wheel 33 through the U-shaped rod 35 to drive the hopper 32 to make a reciprocating swinging motion in the two longitudinal rods 31, so as to facilitate cleaning the impurities on the inner wall of the hopper 32. After the cleaning is completed, the valve plate 44 is opened, and the cleaned water will be discharged through the discharge pipe 43, and the working process ends here.

[0055] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0056] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disc filter for sewage treatment, comprising a base (1), characterized in that: A water inlet device (2) is fixedly installed at the middle of the base (1), and further comprises: A disc-linked filtering mechanism, comprising a discharge device (3), the discharge device (3) being fixedly mounted on the right side of the water inlet device (2), a filter shell (4) being fixedly mounted on the top of the base (1), a filter device (6) being rotatably mounted inside the filter shell (4), and an auxiliary drive device (7) being fixedly mounted on the left side of the filter device (6); A scraping device (5), the scraping device (5) being fixedly mounted on the right side of the filtering device (6), the scraping device (5) comprising a Z-shaped block (51), a plurality of guide blocks (52) being fixedly mounted on the bottom of the Z-shaped block (51), a plurality of first scrapers (53) being movably mounted on the top of the Z-shaped block (51), a second hydraulic rod (54) being installed through the right side of the plurality of first scrapers (53), a plurality of second scrapers (55) being movably mounted on the right side of the plurality of first scrapers (53), a third hydraulic rod (56) being installed through the right side of the plurality of second scrapers (55), and springs (57) being fixedly connected to the telescopic ends of the second hydraulic rod (54) and the third hydraulic rod (56); A plurality of the first scrapers (53) are fixedly connected to the outer edges of the telescopic ends of the second hydraulic rod (54), and a plurality of the second scrapers (55) are fixedly connected to the outer edges of the telescopic ends of the third hydraulic rod (56); The filter housing (4) comprises a housing (41), two feed pipes (42) are fixedly mounted on the right side of the housing (41), a discharge pipe (43) is fixedly connected to the bottom of the housing (41), a valve plate (44) is rotatably mounted inside the discharge pipe (43), and a plurality of arc-shaped grooves (45) are fixedly mounted inside the housing (41), each of the plurality of arc-shaped grooves (45) being provided with a plurality of circular holes (46); The filtering device (6) comprises a water inlet ring (61), the water inlet ring (61) being fixedly mounted on the top right side of the housing (41), the water inlet ring (61) being fixedly connected to two curved pipes (24), a plurality of L-shaped pipes (62) being distributed in an annular manner on the outer edge of the water inlet ring (61), a plurality of nozzles (63) being mounted on the outer edges of the plurality of L-shaped pipes (62), a rotating shaft (64) being rotatably mounted on the left side of the water inlet ring (61), a plurality of circular rings (65) being fixedly connected to the outer edge of the rotating shaft (64), a plurality of bolts (66) being inserted into the interior of the plurality of circular rings (65), and three groups of arc-shaped filtering plates (67) being annularly mounted on the plurality of circular rings (65) via the bolts (66), a first motor (68) being fixedly connected to the left end of the rotating shaft (64), and the first motor (68) being fixedly mounted on the top of the trapezoidal frame (12).

2. A disc filter for sewage treatment according to claim 1, characterized in that: The base (1) comprises four support rods (11), a trapezoidal frame (12) being fixedly mounted on the top of the four support rods (11), a U-shaped pipe groove (13) being fixedly connected to the left side of the top of the trapezoidal frame (12), an overflow pipe (14) being fixedly connected to the left side of the U-shaped pipe groove (13), and the spring (57) being elastically connected to the top of the trapezoidal frame (12).

3. A disc filter for sewage treatment according to claim 2, characterized in that: The water inlet device (2) comprises a water inlet pipe (21), the water inlet pipe (21) being fixedly mounted at the middle position of the two support rods (11), the top of the water inlet pipe (21) being fixedly connected to a connecting pipe (22), the other end of the connecting pipe (22) being fixedly connected to a compressor (23), and the back of the water inlet pipe (21) being fixedly connected to two bent pipes (24).

4. A disc filter for sewage treatment according to claim 3, characterized in that: The unloading device (3) comprises two longitudinal rods (31), the two longitudinal rods (31) are fixedly mounted on the right side of the support rod (11), a hopper (32) is movably hinged at the middle position of the two longitudinal rods (31), an eccentric wheel (33) is rotatably mounted on the outer side of the two longitudinal rods (31), the two eccentric wheels (33) are fixedly connected to the hopper (32), the outer side of the two eccentric wheels (33) are movably hinged with a connecting block (34), the left side of the two connecting blocks (34) are movably hinged with a U-shaped rod (35), the left side of the U-shaped rod (35) is fixedly connected with a first hydraulic rod (36), the telescopic end of the first hydraulic rod (36) is fixedly connected with a cross plate (37), and the cross plate (37) is fixedly mounted on the bottom of the trapezoidal frame (12).

5. A disc filter for sewage treatment according to claim 4, characterized in that: The auxiliary drive device (7) comprises a second motor (71), the output shaft of the second motor (71) is fixedly connected to a gear set (72), a rotating rod (73) is inserted into the interior of the gear set (72), a plurality of fixed blocks (74) are movably sleeved on the outer edge of the rotating rod (73), the gear set (72) and the plurality of fixed blocks (74) are fixedly mounted on the top of the trapezoidal frame (12), both ends of the rotating rod (73) are fixedly connected to rotating blocks (75), the outer sides of the two rotating blocks (75) are movably hinged to straight rods (76), the right sides of the two straight rods (76) are movably hinged to wheel rings (77), the left wheel ring (77) is fixedly connected to the outer edge of the water inlet ring (61), and the right wheel ring (77) is fixedly connected to the rotating shaft (64).

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