A multi-stage sewage treatment equipment

Abstract

The invention discloses a multi-stage sewage treatment equipment, which relates to the technical field of sewage treatment, and comprises: a primary sewage treatment component, which comprises a preliminary filtering component, a primary sedimentation component and a sediment collection component, and the primary sedimentation component is arranged on one side of the preliminary filtering component, a sewage inlet pipe is arranged on the upper part of the other side of the preliminary filtering component, and a sediment collection component is arranged on the front end of the primary sedimentation component close to the side of the preliminary filtering component; a secondary sewage treatment component is arranged on the side of the sediment collection component away from the preliminary filtering component, and a tertiary sewage treatment component is arranged on the other side of the secondary sewage treatment component, and a sewage discharge pipe is arranged on the other side of the tertiary sewage treatment component; the invention ensures that the effluent water quality meets the discharge standard or is suitable for reuse requirements through grid interception and sedimentation separation in the pretreatment stage, activated sludge method for removing organic matter in the secondary biological treatment stage, and disinfection and filtration in the tertiary treatment stage.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a multi-stage sewage treatment device. Background Art

[0002] With the growth of global population and the acceleration of industrialization, water shortage and pollution problems are becoming increasingly serious. In order to protect water resources and ecological environment, countries have stepped up efforts in sewage treatment and improved the research and development and application of sewage treatment equipment. With the advancement of science and technology, sewage treatment technology has been continuously innovated. From the initial simple sedimentation and disinfection to the later combination of biological treatment, physical and chemical treatment and other technologies, the efficiency and quality of sewage treatment have been significantly improved.

[0003] However, when the existing sewage treatment equipment pre-treats the sewage, the screen is usually used to filter the large pieces of matter in the sewage to reduce the processing pressure of the subsequent components. However, the large pieces of matter in the sewage will continue to be blocked at the screen. As time goes by, it will cause blockage to a certain extent, thereby affecting the flow of water and reducing the sewage treatment efficiency. At the same time, after the initial filtration, the existing device has fewer sedimentation tanks and a longer sedimentation cycle, so the device usually works periodically and cannot continuously treat sewage, which greatly reduces the treatment efficiency.

[0004] Therefore, it is necessary to provide a multi-stage sewage treatment equipment to solve the above problems. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution, a multi-stage sewage treatment equipment, comprising:

[0006] A primary sewage treatment component, comprising a preliminary filtering component, a primary sedimentation component and a sediment collection component, wherein the primary sedimentation component is disposed on one side of the preliminary filtering component, a sewage inlet pipe is disposed above the other side of the preliminary filtering component, and a sediment collection component is disposed at the front end of the primary sedimentation component close to the side of the preliminary filtering component;

[0007] A secondary sewage treatment component is arranged on a side of the sediment collection component away from the primary filtering component, and a tertiary sewage treatment component is arranged on the other side of the secondary sewage treatment component, and a sewage discharge pipe is arranged on the other side of the tertiary sewage treatment component.

[0008] Further, as a preference, the preliminary filtration assembly comprises a water collection tank, on which a plurality of groups of screw conveyors are fixedly embedded, each group of the screw conveyors is rotatably provided with a rotating grille, and the rotating grille is rotatably provided on the inner wall of the water collection tank, and one end of each group of the rotating grilles is meshed with a rotating grille driver, and each group of the rotating grille drivers is fixedly assembled on the water collection tank;

[0009] A filtrate collecting trough is arranged below the output end of each group of screw conveyors. The filtrate collecting trough is fixedly arranged on the filtrate dripping collection pool. A dripping hole is arranged on the lower surface of the filtrate collecting trough.

[0010] Further, as a preference, a first water pump is fixedly installed at the output end of the water collection tank, and the first water pump is provided with a bidirectional input pipe connected to its input end and an output pipe connected to its output end, the input ends of the bidirectional input pipe are respectively arranged on the water collection tank and the filtrate drip collection tank, and the output end of the output pipe is arranged above the primary sedimentation component.

[0011] Furthermore, preferably, the rotating grille includes two groups of fixed rings, on which six groups of grilles are fixedly embedded, and the six groups of grilles are arranged at equal intervals around the circumference. The upper end of each group of screw conveyors located in the water collection pool is provided with a filter material falling groove, and the filter material falling groove is matched with the notch between the two adjacent groups of grilles close to the fixed ring side.

[0012] Further, preferably, the sizes of the grille holes on different groups of rotating grilles are different and decrease along the water flow direction.

[0013] Further, as a preference, the primary sedimentation assembly comprises a fixed frame, on which two sets of driving motors are fixedly mounted, the output shafts of the two sets of driving motors are fixedly mounted with transmissions, the output shafts of the transmissions are fixedly mounted with rotating gears, the outer sides of the two sets of rotating gears are meshed with rotating belts, a plurality of rotating bearing blocks are fixedly mounted on the rotating belts, the rotating bearing blocks are slidably mounted on sliding rails, and the sliding rails are fixedly mounted on the upper surface of the fixed frame;

[0014] A primary sedimentation tank bearing and tilting assembly is fixedly mounted on the upper end of each group of rotating bearing blocks, a primary sedimentation tank is arranged on the upper surface of each group of primary sedimentation tank bearing and tilting assembly, a water outlet pipe is arranged on the side of the primary sedimentation tank away from the rotating belt, and a switch valve is arranged on the water outlet pipe.

[0015] Further, as a preference, the primary sedimentation tank load-bearing tilting assembly includes a fixed support frame, which is two groups of mirror-arranged "L"-shaped structural members, and a plurality of groups of limiting anti-derailment tracks and driving wheels are arranged near the primary sedimentation tank side, and a rotating block is rotatably arranged on the limiting anti-derailment track on each group of "L"-shaped structural members, and a load-bearing beam is arranged between the two groups of rotating blocks.

[0016] Further, as a preference, the sediment collection assembly comprises a sediment collection pool, a fixed bracket is horizontally fixedly mounted on one side of the sediment collection pool away from the primary sedimentation assembly, a mechanical arm is disposed at the upper end of the fixed bracket, an air gun is disposed at the front end of the mechanical arm, and the air gun is connected to an air compressor.

[0017] Further, as a preference, the secondary sewage treatment component includes an aeration tank, and two groups of second water pumps are arranged on the side of the aeration tank away from the sediment collection component, the two groups of second water pumps are arranged in a mirror-like manner, and a secondary sedimentation tank is arranged at the other end of the two groups of second water pumps, a stirring group is arranged inside the aeration tank and the secondary sedimentation tank, and an activated sludge addition group and a flocculant addition group are respectively arranged on the end of the aeration tank and the secondary sedimentation tank away from the sediment collection component.

[0018] Further, as a preference, the three-stage sewage treatment component includes a third water pump, the output end of the third water pump is fixedly connected to a precision filter, the output end of the precision filter is connected to a fourth water pump, a disinfection tank is arranged below the output end of the fourth water pump, a chlorine generator is arranged at one end of the disinfection tank, and the output end of the chlorine generator is arranged inside the disinfection tank.

[0019] Compared with the prior art, the present invention provides a multi-stage sewage treatment equipment, which has the following beneficial effects:

[0020] In the present invention, the device is provided with a preliminary filtering component to filter large solid debris and floating objects of different sizes by setting a plurality of groups of grid holes of different sizes, and at the same time, the setting of rotating the grid and the screw conveyor ensures that the large solid debris and floating objects are separated from the water collection tank through the screw conveyor, thereby avoiding the blockage problem that may be caused by the traditional grid filtering, and a filter collection tank is provided, and the large solid debris and floating objects will drop the attached water into the filter drip collection tank through the drip hole, avoiding the large solid debris and floating objects attached with a lot of water, causing treatment difficulties or even secondary pollution, and further ensuring the treatment quality and efficiency of sewage.

[0021] In the present invention, the device is provided with a primary sedimentation component, and through the setting of the circulation equipment, the sewage sedimentation work can be carried out uninterruptedly, avoiding the need for a lot of time for sedimentation in the traditional sewage treatment mode, thereby ensuring the sewage treatment efficiency.

[0022] In the present invention, multi-stage treatment is carried out through physical, chemical and biological methods, including grid interception and sedimentation separation in the pretreatment stage, activated sludge method for removing organic matter in the secondary biological treatment process, and disinfection and filtration in the tertiary treatment stage, to ensure that the effluent water quality meets the national emission standards or is suitable for reuse requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the structure of a multi-stage sewage treatment equipment.

[0024] Figure 2 This is a schematic diagram of the preliminary filtering component structure.

[0025] Figure 3Schematic diagram of the rotating grille structure.

[0026] Figure 4 Schematic diagram of the structure of the primary sedimentation component.

[0027] Figure 5 Schematic diagram of the structure of the load-bearing overturning assembly of the primary sedimentation tank.

[0028] Figure 6 This is a schematic diagram of the structure of the sediment collection component.

[0029] Figure 7 Schematic diagram of the secondary sewage treatment component structure.

[0030] Figure 8 Schematic diagram of the structure of the three-stage sewage treatment components.

[0031] In the figure: 1. primary sewage treatment component; 2. preliminary filtration component; 3. primary sedimentation component; 4. sediment collection component; 5. secondary sewage treatment component; 6. tertiary sewage treatment component; 21. water collection tank; 22. screw conveyor; 23. rotating grille; 24. rotating grille driver; 25. filter drop trough; 26. filter collection trough; 27. filter drip collection tank; 28. first pump; 29. ​​two-way input pipe; 210. output pipe; 211. fixed ring; 212. grille; 31. fixed frame; 32. sliding track; 33. rotating gear; 34. drive motor; 35. rotating belt; 36. rotating Bearing block; 37. primary sedimentation tank bearing overturning assembly; 38. primary sedimentation tank; 39. outlet pipe; 371. fixed support frame; 372. limit anti-derailment track; 373. driving wheel; 374. rotating block; 375. bearing beam; 41. sediment collection tank; 42. fixed bracket; 43. mechanical arm; 44. air gun; 45. air compressor; 51. aeration tank; 52. second water pump; 53. secondary sedimentation tank; 54. stirring group; 55. activated sludge addition group; 56. flocculant addition group; 61. third water pump; 62. precision filter; 63. fourth water pump; 64. disinfection tank; 65. chlorine generator. DETAILED DESCRIPTION

[0032] See also Figures 1 to 8 The present invention provides a multi-stage sewage treatment equipment, comprising:

[0033] A primary sewage treatment component 1, comprising a preliminary filtering component 2, a primary sedimentation component 3 and a sediment collection component 4, wherein the primary sedimentation component 3 is arranged on one side of the preliminary filtering component 2, a sewage inlet pipe is arranged on the upper side of the other side of the preliminary filtering component 2, and a sediment collection component 4 is arranged on the front end of the primary sedimentation component 3 close to the side of the preliminary filtering component 2;

[0034] A secondary sewage treatment component 5 is arranged on a side of the sediment collection component 4 away from the primary filtering component 2, and a tertiary sewage treatment component 6 is arranged on the other side of the secondary sewage treatment component 5, and a sewage discharge pipe is arranged on the other side of the tertiary sewage treatment component 6;

[0035] As a preferred embodiment, the primary sewage treatment component 1 removes large solid debris and floating objects in the sewage through the preliminary filtration component 2, and at the same time, removes small heavy substances such as sand and gravel through the primary sedimentation component 3. Then the secondary sewage treatment component 5 uses the microorganisms in the activated sludge to degrade the organic matter in the sewage and perform nitrogen and phosphorus removal treatment. These microorganisms consume pollutants through metabolism, converting them into relatively harmless substances, and remove them through secondary sedimentation. After being treated by the secondary sewage treatment component 5, the sewage may still contain tiny suspended matter, organic matter and inorganic matter, which are further removed by the tertiary sewage treatment component 6, and disinfected to kill possible bacteria and other harmful substances. The setting of the sediment collection component 4 can ensure the removal of the sediment in the primary sedimentation component 3, thereby ensuring the sedimentation efficiency and sedimentation quality of the primary sedimentation component 3.

[0036] Further, the preliminary filtering assembly 2 includes a water collection tank 21, on which a plurality of groups of screw conveyors 22 are fixedly embedded, each group of the screw conveyors 22 is rotatably provided with a rotating grille 23, and the rotating grille 23 is rotatably provided on the inner wall of the water collection tank 21, and one end of each group of the rotating grilles 23 is meshed with a rotating grille driver 24, and each group of the rotating grille driver 24 is fixedly assembled on the water collection tank 21;

[0037] A filtrate collection trough 26 is provided below the output end of each set of screw conveyors 22. The filtrate collection trough 26 is fixedly provided on a filtrate drip collection pool 27. A drip hole is provided on the lower surface of the filtrate collection trough 26.

[0038] As a preferred embodiment, after the sewage is introduced into the sump 21, the rotating grille driver 24 will drive the rotating grille 23 to rotate, thereby scooping out large pieces of solid debris and floating objects in the sewage. At the same time, when the rotating grille 23 drives the large pieces of solid debris and floating objects it has scooped to the top, the large pieces of solid debris and floating objects will fall into the screw conveyor 22. The screw conveyor 22 always keeps working, and it will pour the large pieces of solid debris and floating objects into the corresponding filtrate collection tank 26. The large pieces of solid debris and floating objects will drop the attached water into the filtrate drip collection tank 27 through the drip holes.

[0039] Further, the output end of the water collection tank 21 is fixedly equipped with a first water pump 28, and the first water pump 28 is provided with a two-way input pipe 29 connected to its input end and an output pipe 210 connected to its output end, and the input ends of the two-way input pipe 29 are respectively arranged on the water collection tank 21 and the filtered drip collection tank 27, and the output end of the output pipe 210 is arranged above the primary sedimentation component 3;

[0040] As a preferred embodiment, the provision of the bidirectional input pipe 29 can further ensure the quality and efficiency of sewage treatment, while preventing large pieces of solid debris and floating objects from being attached with a lot of water, causing treatment difficulties or even secondary pollution.

[0041] Furthermore, the rotating grille 23 includes two sets of fixed rings 211, and six sets of grilles 212 are fixedly embedded on the two sets of fixed rings 211. The six sets of grilles 212 are arranged at equal intervals around the circumference. The upper end of each set of the screw conveyor 22 located in the water collection tank 21 is provided with a filter drop groove 25, and the filter drop groove 25 is matched with the notch between the two adjacent sets of grilles 212 close to the fixed ring 211.

[0042] As a preferred embodiment, the arrangement of six groups of the grilles 212 can further improve the service life of the rotating grilles 23, and the arrangement of the filter material falling trough 25 and the matching grooves between the two adjacent groups of grilles 212 close to the fixed ring 211 can ensure that large pieces of solid debris and floating objects can be separated from the water collection tank 21 through the screw conveyor 22, thereby avoiding the blockage problem that may be caused by traditional grille filtration.

[0043] Furthermore, the sizes of the grille holes of the grilles 212 on different groups of rotating grilles 23 are different and decrease along the water flow direction;

[0044] As a preferred embodiment, the setting of the decreasing grille holes can process large solid debris and floating objects by volume using different rotating grilles 23, while ensuring the quality of pretreatment, avoiding excessive work and damage of the first group of rotating grilles 23, thereby reducing the service life and processing efficiency.

[0045] Further, the primary sedimentation assembly 3 includes a fixed frame 31, on which two sets of drive motors 34 are fixedly mounted, the output shafts of the two sets of drive motors 34 are fixedly mounted with transmissions, the output shafts of the transmissions are fixedly mounted with rotating gears 33, the outer sides of the two sets of rotating gears 33 are meshed with rotating belts 35, and the rotating belts 35 are fixedly mounted with multiple sets of rotating bearing blocks 36, the rotating bearing blocks 36 are slidably mounted on the sliding rails 32, and the sliding rails 32 are fixedly mounted on the upper surface of the fixed frame 31;

[0046] A primary sedimentation tank bearing overturning assembly 37 is fixedly mounted on the upper end of each group of the rotating bearing blocks 36. A primary sedimentation tank 38 is arranged on the upper surface of each group of the primary sedimentation tank bearing overturning assembly 37. A water outlet pipe 39 is arranged on the side of the primary sedimentation tank 38 away from the rotating belt 35. A switch valve is arranged on the water outlet pipe 39.

[0047] As a preferred embodiment, the driving motor 34, the rotating gear 33, the rotating belt 35 and the sliding track 32 form a horizontal ring conveyor belt, which drives the rotating bearing block 36 to drive the primary sedimentation tank bearing overturning assembly 37 thereon to move, so that the primary sedimentation tank 38 fixed thereon can perform sedimentation work during rotation, thereby ensuring that the primary sedimentation assembly 3 can constantly introduce the sewage filtered by the preliminary filtering assembly 2, and according to the scale of sewage treatment, the number of the primary sedimentation tank bearing overturning assembly 37 and the primary sedimentation tank 38 thereon can be increased to a certain extent, and because the efficiency of sewage sedimentation is roughly the same, the primary The number of sedimentation tanks 38 is proportional to the rotation rate of the drive motor 34, thereby ensuring the high-efficiency operation of the sewage treatment work, and when the primary sedimentation tank 38 moves to the corresponding position of the aeration tank 51 of the secondary sewage treatment component 5, the sewage in the primary sedimentation tank 38 completes sedimentation, and the switch valve on its outlet pipe 39 opens, and the sewage therein flows into the aeration tank 51. When the primary sedimentation tank 38 to be discharged from the sewage reaches the corresponding position of the sediment collection component 4, its primary sedimentation tank bearing overturning component 37 will drive the primary sedimentation tank 38 to overturn, thereby pouring the sediment therein into the sediment collection component 4, so as to facilitate its subsequent sedimentation work.

[0048] Further, the primary sedimentation tank load-bearing overturning assembly 37 includes a fixed support frame 371, which is two groups of "L"-shaped structural members arranged in a mirror image, and a plurality of groups of limit anti-derailment tracks 372 and driving wheels 373 are arranged near the primary sedimentation tank 38. The limit anti-derailment tracks 372 on each group of "L"-shaped structural members are rotatably provided with a rotating block 374, and a load-bearing beam 375 is arranged between the two groups of rotating blocks 374;

[0049] As a preferred embodiment, multiple sets of limited anti-derailment tracks 372 on the same side constitute a part of a circular track. The rotation of the driving wheel 373 will drive the rotating block 374 to rotate along the track, thereby driving the primary sedimentation tank 38 thereon to overturn, and then draining out the sediment therein. In actual use, the maximum rotation angle of the rotating block 374 is 120°. Under the premise of ensuring that the rotating block 374 does not deviate from the track, the drainage of the sediment in the primary sedimentation tank 38 is accelerated.

[0050] Further, the sediment collection assembly 4 includes a sediment collection pool 41, and a fixing bracket 42 is horizontally fixedly mounted on the side of the sediment collection pool 41 away from the primary sedimentation assembly 3, and a mechanical arm 43 is arranged on the upper end of the fixing bracket 42, and an air gun 44 is arranged at the front end of the mechanical arm 43, and the air gun 44 is connected to an air compressor 45;

[0051] As a preferred embodiment, when the secondary sedimentation tank 38 overturns, a small amount of sediment therein will be adsorbed on the inner wall of the primary sedimentation tank 38. At this time, the robotic arm 43 will drive the air gun 44 to blow air, and the sediment attached to the inner wall of the primary sedimentation tank 38 will be blown off by the high-pressure gas, thereby ensuring the cleanliness of the primary sedimentation tank 38 and further improving the sewage treatment efficiency.

[0052] Further, the secondary sewage treatment component 5 includes an aeration tank 51, and two groups of second water pumps 52 are arranged on the side of the aeration tank 51 away from the sediment collection component 4, and the two groups of second water pumps 52 are arranged in a mirror image, and a secondary sedimentation tank 53 is arranged at the other end of the two groups of second water pumps 52, and a stirring group 54 is arranged inside the aeration tank 51 and the secondary sedimentation tank 53, and an activated sludge addition group 55 and a flocculant addition group 56 are respectively arranged on the end of the aeration tank 51 and the secondary sedimentation tank 53 away from the sediment collection component 4;

[0053] As a preferred embodiment, the aeration tank 51 will degrade organic matter in the sewage and remove nitrogen and phosphorus through activated sludge. These microorganisms consume pollutants through metabolism and convert them into relatively harmless substances. Then, they are introduced into the secondary sedimentation tank 53 through a group of second pumps 52. The secondary sedimentation tank 53 will perform sedimentation through the addition of flocculants to further purify the sewage. At the same time, another group of second pumps 52 will extract the sediment and separate the active activated sludge therein, and introduce it into the aeration tank 51 to reduce losses. Other sediments are collected for unified treatment. The activated sludge is composed of added microorganisms with metabolic capacity, endogenous substances of the microorganisms, and residual substances oxidized by themselves. The activated sludge is composed of the residual materials, the difficult-to-degrade inert organic matter brought in by the original sewage, and the inorganic matter brought in by the sewage. The microorganisms and colloidal substances in it have strong adsorption capacity, which can adsorb suspended matter, colloidal substances and soluble organic matter in the water. At the same time, the microorganisms decompose the organic matter adsorbed on the surface of the sludge into inorganic matter through metabolic activities, thereby achieving water purification. Under the action of gravity, the suspended matter and colloidal substances in the activated sludge will gradually settle down, and the sludge layer can also play a filtering role to further remove impurities in the water. The setting of the stirring group 54 promotes the dispersion of flocculants, accelerates the formation of flocs and improves the mixing effect. At the same time, another stirring group 54 can accelerate the degradation efficiency of the activated sludge.

[0054] Further, the tertiary sewage treatment component 6 includes a third water pump 61, the output end of the third water pump 61 is fixedly connected to a precision filter 62, the output end of the precision filter 62 is connected to a fourth water pump 63, a disinfection tank 64 is arranged below the output end of the fourth water pump 63, a chlorine generator 65 is arranged at one end of the disinfection tank 64, and the output end of the chlorine generator 65 is arranged inside the disinfection tank 64;

[0055] As a preferred embodiment, after being treated by the secondary sewage treatment component 5, the sewage may still contain tiny suspended matter, organic matter and inorganic matter. In this step, these substances are further removed by the precision filter 62. Then, in order to ensure the safety of the treated water quality, chlorine disinfection treatment is carried out to kill possible bacteria and other harmful substances, thereby further ensuring the treatment quality of the sewage.

[0056] During the specific implementation, the following steps are included: sewage enters the primary sewage treatment component 1 through the sewage inlet pipe, the primary sewage treatment component 1 removes large solid debris and floating objects in the sewage through the preliminary filtering component 2, and introduces the treated sewage into the primary sedimentation component 3, and the sewage on the upper layer is introduced into the secondary sewage treatment component 5, and the heavy material precipitation such as sand and gravel therein is removed by the sediment collection component 4. At the same time, the secondary sewage treatment component 5 uses microorganisms in the activated sludge to degrade organic matter in the sewage and perform nitrogen and phosphorus removal treatment. These microorganisms consume pollutants through metabolism and convert them into relatively harmless substances, and remove them through secondary sedimentation. After being treated by the secondary sewage treatment component 5, the sewage may still contain tiny suspended matter, organic matter and inorganic matter, which are further removed by the tertiary sewage treatment component 6, and disinfected to kill possible bacteria and other harmful substances. The setting of the sediment collection component 4 can ensure the removal of the sediment in the primary sedimentation component 3, thereby ensuring the sedimentation efficiency and sedimentation quality of the primary sedimentation component 3.

[0057] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage sewage treatment equipment, characterized in that: include: A primary sewage treatment component (1), comprising a preliminary filtering component (2), a primary sedimentation component (3) and a sediment collection component (4), wherein the primary sedimentation component (3) is arranged on one side of the preliminary filtering component (2), a sewage inlet pipe is arranged above the other side of the preliminary filtering component (2), and a sediment collection component (4) is arranged on the front end of the primary sedimentation component (3) close to the side of the preliminary filtering component (2); A secondary sewage treatment component (5) is arranged on a side of the sediment collection component (4) away from the primary filtering component (2), and a tertiary sewage treatment component (6) is arranged on the other side of the secondary sewage treatment component (5), and a sewage discharge pipe is arranged on the other side of the tertiary sewage treatment component (6); The preliminary filtering assembly (2) comprises a water collecting tank (21), on which a plurality of groups of screw conveyors (22) are fixedly embedded, each group of screw conveyors (22) being rotatably provided with a rotating grille (23), and the rotating grille (23) being rotatably provided on the inner wall of the water collecting tank (21), and each group of rotating grilles (23) being meshed with a rotating grille driver (24) at one end, and each group of rotating grille drivers (24) being fixedly mounted on the water collecting tank (21); A filtrate collection trough (26) is provided below the output end of each set of screw conveyors (22), the filtrate collection trough (26) is fixedly arranged on a filtrate drip collection pool (27), and a drip hole is provided on the lower surface of the filtrate collection trough (26); The primary sedimentation assembly (3) comprises a fixed frame (31), two sets of driving motors (34) are fixedly mounted on the fixed frame (31), the output shafts of the two sets of driving motors (34) are fixedly mounted with a transmission, the output shaft of the transmission is fixedly mounted with a rotating gear (33), the outer sides of the two sets of rotating gears (33) are meshed with a rotating belt (35), a plurality of sets of rotating bearing blocks (36) are fixedly mounted on the rotating belt (35), the rotating bearing blocks (36) are slidably mounted on a sliding track (32), and the sliding track (32) is fixedly mounted on the upper surface of the fixed frame (31); A primary sedimentation tank bearing tilting assembly (37) is fixedly mounted on the upper end of each set of rotating bearing blocks (36); a primary sedimentation tank (38) is arranged on the upper surface of each set of primary sedimentation tank bearing tilting assembly (37); a water outlet pipe (39) is arranged on the side of the primary sedimentation tank (38) away from the rotating belt (35); and a switch valve is arranged on the water outlet pipe (39); The primary sedimentation tank load-bearing overturning assembly (37) comprises a fixed support frame (371), which is two groups of "L"-shaped structural members arranged in a mirror image. The fixed support frame (371) is provided with a plurality of groups of position-limiting anti-derailment tracks (372) and driving wheels (373) on the side close to the primary sedimentation tank (38). A rotating block (374) is rotatably provided on the position-limiting anti-derailment tracks (372) on each group of "L"-shaped structural members, and a load-bearing beam (375) is provided between the two groups of rotating blocks (374).

2. A multi-stage sewage treatment equipment according to claim 1, characterized in that: A first water pump (28) is fixedly mounted at the output end of the water collection tank (21). The first water pump (28) is provided with a bidirectional input pipe (29) connected to its input end and an output pipe (210) connected to its output end. The input ends of the bidirectional input pipe (29) are respectively arranged on the water collection tank (21) and the filtered material drip collection tank (27), and the output end of the output pipe (210) is arranged above the primary sedimentation assembly (3).

3. A multi-stage sewage treatment equipment according to claim 1, characterized in that: The rotating grille (23) comprises two sets of fixed rings (211), six sets of grilles (212) are fixedly embedded on the two sets of fixed rings (211), and the six sets of grilles (212) are arranged at equal intervals on the circumference. The upper end of each set of screw conveyors (22) located in the water collection tank (21) is provided with a filter material drop groove (25), and the filter material drop groove (25) is matched with the groove between the two adjacent sets of grilles (212) near the fixed ring (211).

4. A multi-stage sewage treatment equipment according to claim 3, characterized in that: The grille holes of the grilles (212) on different groups of rotating grilles (23) have different sizes, and the sizes decrease along the water flow direction.

5. The multi-stage sewage treatment equipment according to claim 1, characterized in that: The sediment collection assembly (4) comprises a sediment collection pool (41), a fixed bracket (42) being horizontally fixedly mounted on a side of the sediment collection pool (41) away from the primary sedimentation assembly (3), a mechanical arm (43) being disposed at the upper end of the fixed bracket (42), an air gun (44) being disposed at the front end of the mechanical arm (43), and the air gun (44) being connected to an air compressor (45).

6. A multi-stage sewage treatment equipment according to claim 1, characterized in that: The secondary sewage treatment component (5) comprises an aeration tank (51). Two groups of second pumping pumps (52) are arranged on one side of the aeration tank (51) away from the sediment collection component (4). The two groups of second pumping pumps (52) are arranged in a mirror image, and a secondary sedimentation tank (53) is arranged at the other end of the two groups of second pumping pumps (52). A stirring group (54) is arranged inside the aeration tank (51) and the secondary sedimentation tank (53). An activated sludge addition group (55) and a flocculant addition group (56) are respectively arranged on one end of the aeration tank (51) and the secondary sedimentation tank (53) away from the sediment collection component (4).

7. The multi-stage sewage treatment equipment according to claim 1, characterized in that: The tertiary sewage treatment component (6) comprises a third water pump (61), the output end of the third water pump (61) is fixedly connected to a precision filter (62), the output end of the precision filter (62) is connected to a fourth water pump (63), a disinfection pool (64) is arranged below the output end of the fourth water pump (63), a chlorine generator (65) is arranged at one end of the disinfection pool (64), and the output end of the chlorine generator (65) is arranged inside the disinfection pool (64).

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