Sewage treatment device capable of removing impurities

Abstract

The invention relates to the technical field of sewage treatment, in particular to an impurity-removing sewage treatment device which comprises a primary filter tank, a sewage inlet pipe penetrates through the left side wall of the primary filter tank, a fixing groove is formed in the bottom of an inner cavity of the primary filter tank, a fixing block is clamped in the fixing groove and fixedly connected with a gas shielding plate, and the gas shielding plate is fixedly connected with the primary filter tank. Two symmetrical air inlet pipes penetrate through the top of the air shielding plate, and the lower ends of the air inlet pipes extend to an inner cavity of the primary filter tank. By arranging the primary filter tank, the sedimentation tank and the secondary filter tank, an existing sewage treatment device is simplified, and the sewage treatment efficiency is greatly improved under the conditions that the occupied area is greatly reduced and the installation is more convenient. According to the domestic sewage treatment device, most of domestic sewage can be subjected to impurity removal treatment, meanwhile, peculiar smell is reduced, the direct discharge standard is achieved, part of domestic sewage generated by rural areas which are not connected into municipal sewage pipe networks and old communities with aged pipe networks is effectively treated, and the living environment of people is improved while the ecological environment is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a sewage treatment device for impurity removal. Background Art

[0002] Under the dual pressures of global water resource shortage and rapid urbanization, domestic sewage treatment has become the core issue of ecological civilization construction. As a country with a per capita water resource occupancy of only 1 / 4 of the world average level, the contradiction between sewage treatment capacity and demand in China is particularly prominent, especially in rural areas and old communities. At present, in rural areas with a large population concentration, the full coverage of municipal sewage pipelines has not been achieved, and the residential population in rural areas is scattered. Traditional large-scale centralized sewage treatment devices are difficult to effectively play a role in the "small and scattered" sewage discharge mode in rural areas. Moreover, many old communities also have serious problems of aging pipelines. If the sewage pipelines are to be fully connected in these rural areas and the aging pipelines are to be updated in old communities, not only a large amount of material investment is required, but also long-term planning and construction are needed, making it difficult to solve the imminent sewage problem.

[0003] In addition, existing sewage treatment devices generally have the problem that the grille is easily blocked by hair and fibers. As the first "gateway" of sewage treatment, grille blockage not only interrupts the sewage treatment work and affects the final sewage treatment effect, but also greatly increases the cost of equipment cleaning and maintenance. And the sedimentation process in sewage treatment mainly relies on static settlement, which takes a lot of time and affects the sewage treatment speed. In view of the above problems, the present invention proposes a three-stage sewage treatment device, which realizes a coordinated breakthrough in the high compactness of functional modules, convenient operation and maintenance, and efficient impurity removal through structural innovation and process optimization, and is particularly suitable for the urban and rural end water treatment scenarios with limited land resources and poor pipeline conditions, while protecting the ecological environment and improving the living environment in rural areas and old communities. Summary of the Invention

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

[0005] The technical solution of the present invention is as follows: It includes a primary filtration tank. The left side wall of the primary filtration tank is penetrated by a sewage inlet pipe. A fixed groove is opened at the bottom of the inner cavity of the primary filtration tank. A fixed block is clamped in the fixed groove. The fixed block is fixedly connected with an air-blocking plate. Two symmetrical air inlet pipes are arranged on the top of the air-blocking plate. The top of the air-blocking plate is penetrated by the two air inlet pipes, and the lower end of the air inlet pipe extends into the inner cavity of the primary filtration tank. A rope support block is fixedly connected to the top of the air-blocking plate. A grille is clamped on the right side wall of the primary filtration tank. A water storage tank is fixedly connected to the lower part of the right side wall of the primary filtration tank. A garbage collection tank is placed on the water storage tank. A primary filtered water outlet pipe is arranged on the right side wall of the water storage tank. A water pump is arranged on the right side of the water storage tank. The primary filtered water outlet pipe is fixedly sleeved on the water inlet end of the water pump. The water outlet end of the water pump is fixedly sleeved with a sedimentation inlet pipe. A sedimentation tank is arranged on the right side of the water pump. The sedimentation inlet pipe penetrates the left side wall of the sedimentation tank and extends into the inner cavity of the sedimentation tank. A mud hopper is threadedly connected to the lower end of the sedimentation tank. Two symmetrical support columns are fixedly connected to the side wall of the sedimentation tank. A sedimentation cover is fixedly installed on the top of the sedimentation tank. A sedimentation outlet pipe is arranged on the right side wall of the sedimentation tank. A valve is fixedly installed in the middle of the sedimentation outlet pipe. A secondary filtration tank is arranged on the right side of the sedimentation tank. The sedimentation outlet pipe penetrates the left side wall of the secondary filtration tank and extends into the inner cavity of the secondary filtration tank. Two symmetrical first fixed chutes are opened on the inner wall of the secondary filtration tank. Two symmetrical second fixed chutes are opened on the inner wall of the secondary filtration tank. A sewage outlet pipe is arranged on the right side wall of the secondary filtration tank.

[0006] Preferably, two symmetrical support plates are fixedly connected to the left side of the bottom of the inner cavity of the primary filtration tank. A same fixed shaft is arranged between the two support plates. A double paddle is movably sleeved on the outer surface of the fixed shaft. A long rope is fixedly clamped in the middle of the outer surface of the double paddle. One end of the long rope away from the double paddle is fixedly clamped with a lifting plate. A plurality of symmetrical tooth rakes are fixedly connected to the right side wall of the lifting plate. A magnetic attraction is fixedly connected in each gap of the upper part of the grille. Two symmetrical arc-shaped holes are opened on the side surface of the lifting plate. A long cylinder is arranged in each arc-shaped hole. One end of each long cylinder away from the lifting plate is fixedly connected with a lifting slider. One end of each long cylinder close to the lifting plate is threadedly connected with an anti-detachment nut. Two symmetrical lifting grooves are opened on the inner wall of the primary filtration tank. Two symmetrical springs are fixedly connected to the bottom of the lifting plate. One end of each spring away from the lifting plate is fixedly connected to the bottom of the inner cavity of the primary filtration tank.

[0007] Preferably, the long rope passes through the upper part of the rope support block, and the penetration point of the long rope and the rope support block is higher than the fixed clamping point of the long rope and the lifting plate. Each rake is placed in the gap of the grille. The left and right walls of each rake are serrated, and the upper and lower surfaces of each rake are sharp. The top of each magnetic attraction is at the same height as the top of the garbage collection pool.

[0008] Preferably, ventilation holes are provided at the bottom of the primary filtration tank. One end of the ventilation hole away from the primary filtration tank is opened at the bottom of the water storage tank. A gas collecting pipe is fixedly installed at one end of the ventilation hole close to the primary filtration tank, and an air outlet pipe is fixedly installed at one end of the ventilation hole close to the water storage tank.

[0009] Preferably, one end of the gas collecting pipe away from the bottom of the primary filtration tank is located between two symmetrical inlet pipes. The port of one end of the gas collecting pipe away from the bottom of the primary filtration tank and the port of one end of the inlet pipe away from the top of the air shielding plate are close to each other. The port of one end of the gas collecting pipe away from the bottom of the primary filtration tank, the port of one end of the inlet pipe away from the top of the air shielding plate, and the fixed shaft are all higher than the water level of the sewage.

[0010] Preferably, a rotating shaft is provided in the middle of the sedimentation cover. The rotating shaft passes through the sedimentation cover and extends into the inner cavity of the sedimentation tank. A first gear is fixedly installed on the outer surface of the upper part of the rotating shaft. A second gear is engaged with the outer edge of the first gear. A motor is fixedly installed on the upper surface of the sedimentation cover. The second gear is fixedly sleeved on the output shaft of the motor. Two symmetrical fixed cylinders are fixedly connected to the outer surface of the rotating shaft close to the top of the sedimentation cover. A stirring paddle is fixedly sleeved on the lower part of the rotating shaft.

[0011] Preferably, each lifting slider matches each lifting groove, and each lifting slider can slide up and down in each lifting groove. The diameter of each long cylinder matches the arc-shaped hole, and each long cylinder can slide in each arc-shaped hole.

[0012] Preferably, a first fixed slider is clamped in each first fixed chute, and a second fixed slider is clamped in each second fixed chute. Each first fixed slider is fixedly connected to the same isolation plate, and each second fixed slider is fixedly connected to the same placement plate.

[0013] The present invention provides a sewage treatment device for impurity removal herein. Compared with the prior art, it has the following improvements and advantages: Firstly, the present invention simplifies the existing sewage treatment equipment by setting up a primary filter tank, a sedimentation tank and a secondary filter tank. It can remove impurities from most domestic sewage and reduce odor while meeting the standard for direct discharge, by greatly reducing the floor space and making installation more convenient. It can effectively deal with the domestic sewage generated in some rural areas that are not connected to the municipal sewage network and in old communities with aging pipe networks, thus improving people's living environment while protecting the ecological environment.

[0014] Secondly, the present invention arranges a liftable tooth rake in the primary filtering pool to cut hair and fibers entangled on the filter grille, and arranges a lifting plate and a magnetic suction device to collect and dump solid waste concentrated on the grille in the sewage, thereby solving the problem of easy clogging of the grille and realizing self-cleaning of the grille. While achieving the effect of filtering sewage, it can effectively reduce the maintenance cost of the sewage treatment device and increase its service life.

[0015] Thirdly, the present invention arranges an air shield, an air inlet pipe, an air collecting pipe, an air vent and an air outlet pipe in the primary filtering tank. It utilizes the bubbles generated by the rotation of the double propellers and the negative pressure generated by their rotation to collect the gas outside the tank. Before the sewage reaches the sedimentation tank for cyclone sedimentation without adding any extra burden, aeration sedimentation is performed. While reducing the sedimentation time, a better sedimentation effect is achieved, and the sewage is removed more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a top view of the internal structure of the present invention; Figure 3 is a cross-sectional view of a primary filtration tank of the present invention; Figure 4 is a schematic diagram of the grid structure of the present invention; Figure 5 It is a cross-sectional view of the secondary filtration tank of the present invention.

[0017] Description of reference numerals: 1. Primary filtration tank; 2. Sewage inlet pipe; 3. Fixed groove; 4. Fixed block; 5. Air shielding plate; 6. Air inlet pipe; 7. Rope support block; 8. Grille; 9. Water storage tank; 10. Garbage collection tank; 11. Primary filtered water outlet pipe; 12. Water pump; 13. Sedimentation inlet pipe; 14. Sedimentation tank; 15. Mud hopper; 16. Support column; 17. Sedimentation cover; 18. Sedimentation outlet pipe; 19. Valve; 20. Secondary filtration tank; 21. First fixed sliding groove; 22. Second fixed sliding groove; 23. Support plate; 24. Fixed shaft; 25. Double paddle; 26. Long rope; 27. Lifting plate; 28. Tooth rake; 29. Magnetic attraction; 30. Arc-shaped hole; 31. Long cylinder; 32. Lifting slider; 33. Anti-loosening nut; 34. Lifting groove; 35. Spring; 36. Ventilation hole; 37. Gas collecting pipe; 38. Outlet pipe; 39. Rotating shaft; 40. First gear; 41. Second gear; 42. Motor; 43. Fixed cylinder; 44. Stirring paddle; 45. First fixed slider; 46. Second fixed slider; 47. Partition board; 48. Placing board; 49. Sewage outlet pipe. Detailed implementation manners

[0018] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of 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.

[0019] The present invention provides an impurity-removing sewage treatment device through improvement. The technical solution of the present invention is as follows: Such as Figure 1 - Figure 5As shown in the figure, a sewage treatment device for impurity removal includes a primary filtration tank 1. The left side wall of the primary filtration tank 1 is penetrated by a sewage inlet pipe 2. A fixed groove 3 is provided at the bottom of the inner cavity of the primary filtration tank 1. A fixed block 4 is clamped in the fixed groove 3. The fixed block 4 is fixedly connected to an air shielding plate 5. The top of the air shielding plate 5 is penetrated by two symmetric air inlet pipes 6, and the lower ends of the air inlet pipes 6 extend into the inner cavity of the primary filtration tank 1. A rope support block 7 is fixedly connected to the top of the air shielding plate 5. A grille 8 is clamped on the right side wall of the primary filtration tank 1. A water storage tank 9 is fixedly connected to the lower part of the right side wall of the primary filtration tank 1. A garbage collection tank 10 is placed on the water storage tank 9. There are two symmetric air inlet pipes 6 arranged on the top of the air shielding plate 5. The top of the air shielding plate 5 is penetrated by two air inlet pipes 6, and the lower ends of the air inlet pipes 6 extend into the inner cavity of the primary filtration tank 1. A rope support block 7 is fixedly connected to the top of the air shielding plate 5. A grille 8 is clamped on the right side wall of the primary filtration tank 1. A water storage tank 9 is fixedly connected to the lower part of the right side wall of the primary filtration tank 1. A garbage collection tank 10 is placed on the water storage tank 9. A primary filtered water outlet pipe 11 is arranged on the right side wall of the water storage tank 9. A water pump 12 is arranged on the right side of the water storage tank 9. The primary filtered water outlet pipe 11 is fixedly sleeved on the water inlet end of the water pump 12. The water outlet end of the water pump 12 is fixedly sleeved with a sedimentation inlet pipe 13. A sedimentation tank 14 is arranged on the right side of the water pump 12. The sedimentation inlet pipe 13 penetrates the left side wall of the sedimentation tank 14 and extends into the inner cavity of the sedimentation tank 14. A sludge hopper 15 is threadedly connected to the lower end of the sedimentation tank 14. Two symmetric support columns 16 are fixedly connected to the side wall of the sedimentation tank 14. A sedimentation cover 17 is fixedly installed on the top of the sedimentation tank 14. A sedimentation outlet pipe 18 is arranged on the right side wall of the sedimentation tank 14. A valve 19 is fixedly installed in the middle of the sedimentation outlet pipe 18. A secondary filtration tank 20 is arranged on the right side of the sedimentation tank 14. The sedimentation outlet pipe 18 penetrates the left side wall of the secondary filtration tank 20 and extends into the inner cavity of the secondary filtration tank 20. Two symmetric first fixed chutes 21 are provided on the inner wall of the secondary filtration tank 20. Two symmetric second fixed chutes 22 are provided on the inner wall of the secondary filtration tank 20. A sewage outlet pipe 49 is arranged on the right side wall of the secondary filtration tank 20.

[0020] Further, two symmetric support plates 23 are fixedly connected to the left side of the inner cavity bottom of the primary filter tank 1. A same fixed shaft 24 is arranged between the two support plates 23. A double paddle 25 is movably sleeved on the outer surface of the fixed shaft 24. A long rope 26 is fixedly clamped in the middle of the outer surface of the double paddle 25. One end of the long rope 26 far from the double paddle 25 is fixedly clamped with a lifting plate 27. A plurality of symmetric tooth rakes 28 are fixedly connected to the right side wall of the lifting plate 27. A magnetic attraction 29 is fixedly connected to each gap in the upper part of the grille 8. Two symmetric arc-shaped holes 30 are formed in the side surface of the lifting plate 27. A long cylinder 31 is arranged in each arc-shaped hole 30. One end of each long cylinder 31 far from the lifting plate 27 is fixedly connected with a lifting slider 32. One end of each long cylinder 31 close to the lifting plate 27 is threadedly connected with an anti-loosening nut 33. Two symmetric lifting grooves 34 are formed in the inner wall of the primary filter tank 1. Two symmetric springs 35 are fixedly connected to the bottom of the lifting plate 27. One end of each spring 35 far from the lifting plate 27 is fixedly connected to the inner cavity bottom of the primary filter tank 1. The sewage flushes down from the sewage inlet pipe 2, drives the double paddle 25 to rotate, tightens the long rope 26, and further lifts the lifting plate 27 and a plurality of symmetric tooth rakes 28 to cut hairs and fibers and clean the grille 8.

[0021] Further, the long rope 26 penetrates through the upper part of the support rope block 7. The penetration point of the long rope 26 and the support rope block 7 is higher than the fixed clamping point of the long rope 26 and the lifting plate 27. Each tooth rake 28 is placed in the gap of the grille 8. The left and right walls of each tooth rake 28 are serrated. The upper and lower surfaces of each tooth rake 28 are blade-shaped. The top of each magnetic attraction 29 is at the same height as the top of the garbage collection tank 10. The long rope 26 lifts the lifting plate 27 and the tooth rakes 28 to the bottom of the magnetic attraction 29. The right side of the tooth rake 28 is adsorbed and no longer rises. The left side of the tooth rake 28 and the lifting plate 27 continue to rise under the traction of the long rope 26, causing the lifting plate 27 to overturn towards the right garbage collection tank 10.

[0022] Further, a ventilation hole 36 is formed in the bottom of the primary filter tank 1. One end of the ventilation hole 36 far from the primary filter tank 1 is opened in the bottom of the water storage tank 9. An air collecting pipe 37 is fixedly installed at one end of the ventilation hole 36 close to the primary filter tank 1. An air outlet pipe 38 is fixedly installed at one end of the ventilation hole 36 close to the water storage tank 9. Thus, the gas collected by the air collecting pipe 37 can reach the inside of the water storage tank 9 through the ventilation hole 36 and the air outlet pipe 38 to achieve the effect of aeration and sedimentation.

[0023] Furthermore, one end of the gas collecting pipe 37 away from the bottom of the primary filtration tank 1 is located between two symmetric intake pipes 6. The port of the end of the gas collecting pipe 37 away from the bottom of the primary filtration tank 1 and the port of the end of the intake pipe 6 away from the top of the air baffle 5 are close to each other. The port of the end of the gas collecting pipe 37 away from the bottom of the primary filtration tank 1, the port of the end of the intake pipe 6 away from the top of the air baffle 5, and the fixed shaft 24 are all higher than the water level of the sewage. Thus, the bubbles generated during the rotation of the double paddles 25 and the gas introduced by the intake pipe 6 can enter the gas collecting pipe 37 under the attraction generated during the pumping process of the water pump 12.

[0024] Furthermore, a rotating shaft 39 is provided in the middle of the sedimentation cover 17. The rotating shaft 39 penetrates through the sedimentation cover 17 and extends into the inner cavity of the sedimentation tank 14. A first gear 40 is fixedly installed on the outer surface of the upper part of the rotating shaft 39. The outer edge of the first gear 40 meshes with a second gear 41. A motor 42 is fixedly installed on the upper surface of the sedimentation cover 17. The second gear 41 is fixedly sleeved on the output shaft of the motor 42. Two symmetric fixed cylinders 43 are fixedly connected to the outer surface of the rotating shaft 39 near the top of the sedimentation cover 17. A stirring paddle 44 is fixedly sleeved on the lower part of the rotating shaft 39. Thus, the motor 42 drives the stirring paddle 44 to rotate, accelerating sedimentation.

[0025] Furthermore, each lifting slider 32 matches each lifting groove 34, and each lifting slider 32 can slide up and down in each lifting groove 34. The diameter of each long cylinder 31 matches the arc-shaped hole 30, and each long cylinder 31 can slide in each arc-shaped hole 30. Thus, the lifting plate 27 and the multiple symmetric tooth rakes 28 can maintain stability during the movement.

[0026] Furthermore, a first fixed slider 45 is clamped in each first fixed chute 21, and a second fixed slider 46 is clamped in each second fixed chute 22. Each first fixed slider 45 is fixedly connected to the same isolation plate 47, and each second fixed slider 46 is fixedly connected to the same placement plate 48. Thus, biochar can be added between the isolation plate 47 and the placement plate 48 to achieve the effect of filtering sewage.

[0027] Working principle: Domestic sewage enters the interior of the primary filtration tank 1 through the sewage inlet pipe 2, flushing the double paddles 25 downward. The double paddles 25 start to rotate under the impact force of the sewage, causing the long rope 26 to wind around the middle of the double paddles 25. The long rope 26 tightens and pulls the lifting plate 27 and the rake 28 to rise. The lifting plate 27 and the rake 28 rise to the bottom of the magnetic attraction device 29 and are blocked by the magnetic attraction force. The right side of the rake 28 no longer rises, and its left side is connected to the lifting plate 27 and continues to be pulled upward, causing the lifting plate 27 and the rake 28 to overturn towards the garbage collection tank 10. At the same time, the spring 35 is stretched to the maximum displacement, and the spring 35 starts to rebound, driving the lifting plate 27 and the rake 28 to descend back to the bottom of the primary filtration tank 1. The sewage impacts the double paddles 25, and the double paddles 25 rotate to generate bubbles and at the same time generate negative pressure. The gas outside the air shield 5 enters through the air inlet pipe 6, and together with the generated bubbles, enters the gas collection pipe 37 under the suction force generated by the water pump 12 pumping water, and then enters the water storage tank 9 through the vent holes 36 and the air outlet pipe 38. The gas entering the water storage tank 9 breaks the water film on the surface of the sludge flocs during the rising process, enabling the preliminary sedimentation of small particulate solids in the sewage. The sewage in the water storage tank 9 is pumped by the water pump 12 and enters the interior of the sedimentation tank 14. The motor 42 drives the stirring paddle 44 to rotate to accelerate the solid-liquid separation. The small particulate solids in the sewage enter the sludge hopper 15 along the inner wall of the sedimentation tank 14. After the sedimentation is completed, the valve 19 is opened, and the sewage enters the secondary filtration tank 20 through the sedimentation outlet pipe 18. The sewage is filtered by the biochar between the partition plate 47 and the placement plate 48 and is discharged through the sewage outlet pipe 49.

[0028] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sewage treatment device for removing impurities, comprising a primary filter tank (1), characterized in that: The left side wall of the primary filter tank (1) is penetrated by a sewage inlet pipe (2); a fixing groove (3) is provided at the bottom of the inner cavity of the primary filter tank (1); a fixing block (4) is clamped in the fixing groove (3); the fixing block (4) is fixedly connected to an air shielding plate (5); two symmetrical air inlet pipes (6) are arranged on the top of the air shielding plate (5); the top of the air shielding plate (5) is penetrated by the two air inlet pipes (6), and the lower ends of the air inlet pipes (6) extend to the inner cavity of the primary filter tank (1); the top of the air shielding plate (5) is fixedly connected to the inner cavity of the primary filter tank (1); A supporting rope block (7) is connected, a grille (8) is clamped on the right side wall of the primary filtering pool (1), a water storage pool (9) is fixedly connected to the lower part of the right side wall of the primary filtering pool (1), a garbage collection pool (10) is placed on the water storage pool (9), a primary filtering water outlet pipe (11) is arranged on the right side wall of the water storage pool (9), a water pump (12) is arranged on the right side of the water storage pool (9), the primary filtering water outlet pipe (11) is fixedly sleeved on the water inlet end of the water pump (12), and the water outlet end of the water pump (12) is fixedly sleeved on the sedimentation water inlet pipe (11). 3), a sedimentation tank (14) is arranged on the right side of the water pump (12), the sedimentation water inlet pipe (13) penetrates the left side wall of the sedimentation tank (14) and extends to the inner cavity of the sedimentation tank (14), a mud bucket (15) is threadedly connected to the lower end of the sedimentation tank (14), two symmetrical support columns (16) are fixedly connected to the side wall of the sedimentation tank (14), a sedimentation cover (17) is fixedly installed on the top of the sedimentation tank (14), and a sedimentation water outlet pipe (18) is arranged on the right side wall of the sedimentation tank (14), and the sedimentation water outlet pipe (18) ) is fixedly installed in the middle of the settling tank (14), a secondary filter tank (20) is arranged on the right side of the settling tank (14), the settling outlet pipe (18) passes through the left side wall of the secondary filter tank (20) and extends to the inner cavity of the secondary filter tank (20), the inner wall of the secondary filter tank (20) is provided with two symmetrical first fixed chutes (21), the inner wall of the secondary filter tank (20) is provided with two symmetrical second fixed chutes (22), and the right side wall of the secondary filter tank (20) is provided with a sewage outlet pipe (49).

2. A sewage treatment device for removing impurities according to claim 1, characterized in that: Two symmetrical support plates (23) are fixedly connected to the left side of the bottom of the inner cavity of the primary filtering pool (1); a common fixed shaft (24) is arranged between the two support plates (23); a double paddle (25) is movably sleeved on the outer surface of the fixed shaft (24); a long rope (26) is fixedly clamped in the middle of the outer surface of the double paddle (25); an end of the long rope (26) away from the double paddle (25) is fixedly clamped to a lifting plate (27); a plurality of symmetrical tooth rakes (28) are fixedly connected to the right side wall of the lifting plate (27); a magnetic suction (29) is fixedly connected to each gap on the upper part of the grille (8); and a side surface of the lifting plate (27) is provided with a plurality of symmetrical tooth rakes (28). There are two symmetrical arc-shaped holes (30), each of which has a long cylinder (31) disposed therein, one end of each of which is away from the lifting plate (27) being fixedly connected to a lifting slider (32), and one end of each of which is close to the lifting plate (27) being threadedly connected to an anti-slip nut (33), the inner wall of the primary filter tank (1) is provided with two symmetrical lifting grooves (34), the bottom of the lifting plate (27) is fixedly connected to two symmetrical springs (35), and one end of each of which is away from the lifting plate (27) is fixedly connected to the bottom of the inner cavity of the primary filter tank (1).

3. A sewage treatment device for removing impurities according to claim 2, characterized in that: The long rope (26) passes through the upper part of the supporting rope block (7); the penetration point of the long rope (26) and the supporting rope block (7) is higher than the fixed connection point of the long rope (26) and the lifting plate (27); each of the tooth rakes (28) is placed in the gap of the grille (8); the left and right walls of each of the tooth rakes (28) are serrated; the upper and lower surfaces of each of the tooth rakes (28) are sharp blade-shaped; and the top of each of the magnetic suction (29) is at the same height as the top of the garbage collection pool (10).

4. A sewage treatment device for removing impurities according to claim 1, characterized in that: A vent hole (36) is provided at the bottom of the primary filter pool (1); an end of the vent hole (36) away from the primary filter pool (1) is provided at the bottom of the water storage pool (9); an air collecting pipe (37) is fixedly installed at one end of the vent hole (36) close to the primary filter pool (1); and an air outlet pipe (38) is fixedly installed at one end of the vent hole (36) close to the water storage pool (9).

5. A sewage treatment device for removing impurities according to claim 4, characterized in that: The end of the air collecting pipe (37) away from the bottom of the primary filter tank (1) is located between the two symmetrical air inlet pipes (6), and the end port of the air collecting pipe (37) away from the bottom of the primary filter tank (1) is close to the end port of the air inlet pipe (6) away from the top of the air shield plate (5). The end port of the air collecting pipe (37) away from the bottom of the primary filter tank (1), the end port of the air inlet pipe (6) away from the top of the air shield plate (5), and the fixed axis (24) are all above the horizontal plane of the sewage.

6. A sewage treatment device for removing impurities according to claim 1, characterized in that: A rotating shaft (39) is arranged in the middle of the sedimentation cover (17), the rotating shaft (39) passes through the sedimentation cover (17) and extends to the inner cavity of the sedimentation tank (14), a first gear (40) is fixedly mounted on the upper outer surface of the rotating shaft (39), the outer edge of the first gear (40) is meshed with a second gear (41), a motor (42) is fixedly mounted on the upper surface of the sedimentation cover (17), the second gear (41) is fixedly sleeved on the output shaft of the motor (42), two symmetrical fixed cylinders (43) are fixedly connected to the outer surface of the rotating shaft (39) near the top of the sedimentation cover (17), and a stirring paddle (44) is fixedly sleeved on the lower part of the rotating shaft (39).

7. A sewage treatment device for removing impurities according to claim 2, characterized in that: Each of the lifting sliders (32) matches each of the lifting slots (34), and each of the lifting sliders (32) can slide up and down in each of the lifting slots (34). The diameter of each of the long cylinders (31) matches the arc-shaped hole (30), and each of the long cylinders (31) can slide in each of the arc-shaped holes (30).

8. A sewage treatment device for removing impurities according to claim 1, characterized in that: A first fixed slide block (45) is clamped in each of the first fixed slide grooves (21), a second fixed slide block (46) is clamped in each of the second fixed slide grooves (22), each of the first fixed slide blocks (45) is fixedly connected to the same isolation plate (47), and each of the second fixed slide blocks (46) is fixedly connected to the same placement plate (48).

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