CN117361804A - Hydropower station sewage filtering device and method thereof - Google Patents

Abstract

The invention provides a hydropower station sewage filtration device and a method thereof, and relates to the technical field of hydropower station filtration devices. It includes a sedimentation tank and a reaction tank. The bottom of the sedimentation tank and the opposite side of the outer wall of the reaction tank is connected through a sealing pump with a pump. Inside the sedimentation tank, Guide rails are provided on both sides of the wall, a first collection box is placed at the bottom of the sedimentation tank, and an activated carbon filter plate is detachably installed on the top of one side of the first collection box. This device controls the first servo motor to drive the winding reel to rotate, wind up the nylon rope, and pull the first collection box to move. The shovel plate shovels the impurities at the bottom of the sedimentation tank into the first collection box, and pumps and drains water through the micro water pump. The second collection box is driven to move horizontally on the top of the sewage in the sedimentation tank, and the floating objects on the top of the sewage are collected into the second collection box through the second baffle and the feed port, so that the floating objects and sediments can be salvaged at the same time, improving Effect of physical filter speed.

Description

A hydropower station sewage filtration device and method thereof

Technical field

The present invention belongs to the technical field of hydropower station filtration devices, and more specifically, relates to a hydropower station sewage filtration device and a method thereof.

Background technique

A hydropower station is composed of a hydraulic system, a mechanical system, and an electric energy generation device. It is a water conservancy hub project that converts water energy into electric energy. Hydropower generation is an important part of my country's electric power engineering. Because hydropower generation is clean, efficient, and has stable energy supply Sufficient characteristics have attracted more and more people's attention to hydropower projects, which has resulted in a large number of hydropower stations. Hydropower stations will produce a large amount of sewage during the power generation process. The sewage from hydropower stations mainly includes cooling water generated during the power generation process, Wastewater and rainwater, etc. These sewages contain harmful substances such as suspended solids, grease, heavy metals, etc., which need to be treated to meet discharge standards.

Based on the above, the inventor found that there are the following problems: when sewage is processed, it generally needs to be sedimented. After the sedimented floating objects are fished out, physical filtration is first performed. However, when salvaging is performed, the sedimentation to the bottom is usually carried out separately. The impurities or floating impurities are salvaged, and salvaging alone will stir up the sewage, requiring secondary sedimentation and salvaging again, which consumes a lot of time. At the same time, chemical filtration is required after physical filtration, and some chemicals are poured into the sewage pool. The sewage pool is larger and the chemical reaction rate is slower, resulting in lower sewage treatment efficiency.

Therefore, in view of this, we study and improve the existing structure and deficiencies, and provide a hydropower station sewage filtration device and method, in order to achieve a more practical purpose.

Contents of the invention

In order to solve the above technical problems, the present invention provides a hydropower station sewage filtering device and a method thereof, so as to solve the problem that the current salvage process usually involves separately salvaging the impurities that have sunk to the bottom or floating impurities, and salvaging alone will stir up the sewage, requiring two It takes a lot of time to salvage the sediment again.

The present invention provides a hydropower station sewage filtration device and a method thereof, which are achieved by the following specific technical means:

A sewage filtration device for a hydropower station, including a sedimentation tank and a reaction tank. The bottom of the sedimentation tank and the reaction tank on the opposite side of the outer wall is connected through a seal with a pump. Guide rails are provided on both sides of the inner wall of the sedimentation tank. The bottom of the sedimentation tank A first collection box is placed. An activated carbon filter plate is detachably installed on the top of one side of the first collection box. A first servo motor is fixed in the middle of one end of the top of the sedimentation tank. The power output end of the first servo motor is fixed. There is a reel, a nylon rope is fixed on the inner wall of the reel, a second collection box is provided on the inner wall of the sedimentation tank, floating blocks are fixed on both ends of the second collection box, and both sides of the floating block rotate A roller is connected, a first baffle is fixed in the middle of the inner wall of the second collection box, a micro water pump is fixed at the bottom of the second collection box, a water conduit is connected through the middle of the micro water pump, and both sides of the middle of the inner wall of the reaction tank are Both are rotatably connected with driven shafts, the outer wall of the driven shaft is provided with a stirring rod, a second servo motor is fixed in the middle of the top of the reaction tank, and a driving pulley is fixed at the power output end of the second servo motor. The outer wall of the driving pulley is provided with a transmission belt.

Further, a slope is provided at the bottom of the side of the sedimentation tank close to the first servo motor. The bottoms of the two guide rails are arranged parallel to the bottom of the sedimentation tank. The four corners of the bottom of the first collection box are rotatably connected with moving wheels. The moving wheel is located in the middle of the guide rail and the sedimentation tank.

Further, a shovel plate is fixed at the bottom of one side of the first collection box. The shovel plate is arranged in an inclined shape. The bottom of the shovel plate and the bottom of the moving wheel are located on the same horizontal plane. A connecting buckle is fixed in the middle of the top of the shovel plate. , a hook is fixed at the bottom end of the nylon rope, and the hook is used in conjunction with the connecting buckle.

Further, the first collection box is in a hollow rectangular shape, a placement groove is provided on one side of the top of the first collection box, the activated carbon filter plate is slidingly connected to the placement groove, and a groove is provided at the top of the guide rail. The height value of the groove is equal to the width value of the first collection box.

Furthermore, the vertical section of the second collection box is T-shaped, and the tops of both sides of the second collection box are provided with feed openings. The two rollers on both sides of the floating block are respectively connected with both sides of the inner wall of the sedimentation tank. Fittingly, second baffles are fixed at both ends of both sides of the second collection box, and one end of the second baffle is located on the same vertical plane as one side of the drum.

Further, there are two driving pulleys, and driven pulleys are fixed on the outer walls of the two driven shafts. The two driven pulleys are located on the same vertical plane as the two driving pulleys. The driven pulley and the driving pulley are connected by a transmission belt.

Further, the stirring rods are provided in multiple groups, and the multiple groups of stirring rods are arranged horizontally and equidistantly. Each group is provided with multiple stirring rods, and the plurality of stirring rods are arranged equidistantly around the circumference. The stirring rods on the outer wall of the driven shaft are arranged in a staggered manner.

Furthermore, a check valve is fixed at the bottom of one side of the inner wall of the reaction tank, a drainage pipe is seal-connected through the bottom of the other side of the inner wall of the reaction tank, and a valve is provided on the outer wall of the drainage pipe.

The method of using the sewage filtration device of a hydropower station is based on the above-mentioned sewage filtration device of a hydropower station and includes the following steps:

S1. Inject the sewage into the sedimentation tank, let it stand for 0.5-1 hour, start the first servo motor and the micro water pump at the same time, control the first servo motor to drive the winding reel to rotate, wind up the nylon rope, and pull the first collection box to move , the shovel plate shovels the impurities at the bottom of the sedimentation tank into the first collection box, and provides buoyancy through the floating block, so that the second collection box can stay on the top of the sewage in the sedimentation tank, and pumps and drains water through the micro water pump, driving the second collection box in The top of the sewage in the sedimentation tank moves horizontally, and the floating objects on the top of the sewage are collected through the second baffle and the feed port into the second collection box;

S2. After the physical treatment is completed, pump the water inside the sedimentation tank into the reaction tank through a water pump, and prevent the sewage inside the reaction tank from returning to the sedimentation tank through a check valve;

S3. Pour the chemical reagents into the reaction tank and start the second servo motor to rotate at the same time. The transmission belt drives the two driven shafts to rotate. The rotation of the driven shaft drives multiple stirring rods to rotate to stir the sewage inside the reaction tank. Mixing makes the chemicals react more quickly inside the reaction tank;

S4. After the reaction is completed, drain the water inside the reaction tank through the drainage pipe.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the present invention, the first servo motor is controlled to drive the winding reel to rotate, the nylon rope is rolled up, and the first collection box is moved. The shovel plate shovels the impurities at the bottom of the sedimentation tank into the first collection box, and pumps water through the micro water pump. and drainage, driving the second collection box to move horizontally on the top of the sewage in the sedimentation tank, and collecting the floating objects on the top of the sewage into the second collection box through the second baffle and the feed port, so that the floating objects and sediments can be collected simultaneously. Salvage, the effect of increasing the physical filtration speed.

2. In the present invention, by starting the rotation of the second servo motor, the transmission belt drives the two driven shafts to rotate, and the rotation of the driven shaft drives multiple stirring rods to rotate, stirring and mixing the sewage inside the reaction tank, so that the chemicals are mixed in the reaction tank. The reaction inside the reaction tank is faster, thereby increasing the chemical filtration reaction speed and improving the sewage filtration efficiency.

3. In the present invention, the water inside the sedimentation tank is pumped into the reaction tank through a water pump, and the check valve prevents the sewage inside the reaction tank from returning to the sedimentation tank, so that the sedimentation tank and the reaction tank can be processed at the same time, further improving the efficiency of sewage treatment. .

Description of the drawings

Figure 1 is a schematic top view of the overall structure of the present invention.

Figure 2 is a schematic diagram of the internal structure of the sedimentation tank of the present invention.

Figure 3 is a schematic diagram of the internal structure of the reaction tank of the present invention.

Figure 4 is a schematic structural diagram of the second collection box of the present invention.

Figure 5 is a schematic structural diagram of the first collection box of the present invention.

FIG. 6 is an enlarged schematic diagram of the structure of part A in FIG. 5 .

In the figure, the corresponding relationship between the component names and the drawing numbers is:

1. Sedimentation tank; 2. Guide rail; 3. First servo motor; 4. Reel; 5. Nylon rope; 6. Hook; 7. First collection box; 8. Placement tank; 9. Activated carbon filter plate; 10 , shovel plate; 11. connecting buckle; 12. moving wheel; 13. second collection box; 14. floating block; 15. roller; 16. first baffle; 17. second baffle; 18. micro water pump; 19 , water conduit; 20. reaction tank; 21. water pump; 22. check valve; 23. drainage pipe; 24. second servo motor; 25. driving pulley; 26. transmission belt; 27. driven pulley; 28. Driven shaft; 29, stirring rod; 30, slope; 31, groove.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; in addition, the terms "first", "second", "third", etc. are only used for descriptive purposes. and should not be construed as indicating or implying relative importance.

Example:

As shown in Figure 1 to Figure 6:

The invention provides a hydropower station sewage filtration device and a method thereof, which includes a sedimentation tank 1 and a reaction tank 20. The bottom of the opposite sides of the outer walls of the sedimentation tank 1 and the reaction tank 20 is connected through a sealing connection with a water pump 21. Both sides of the inner wall of the sedimentation tank 1 are provided with There is a guide rail 2. A first collection box 7 is placed at the bottom of the sedimentation tank 1. An activated carbon filter plate 9 is detachably installed on the top of one side of the first collection box 7. A first servo motor 3 is fixed in the middle of one end of the top of the sedimentation tank 1. The power output end of the servo motor 3 is fixed with a reel 4, and the inner wall of the reel 4 is fixed with a nylon rope 5. A second collection box 13 is provided on the inner wall of the sedimentation tank 1, and floating blocks 14 are fixed at both ends of the second collection box 13. , rollers 15 are rotatably connected to both sides of the floating block 14, a first baffle 16 is fixed in the middle of the inner wall of the second collection box 13, a micro water pump 18 is fixed at the bottom of the second collection box 13, and a water conduit 19 is connected through the middle of the micro water pump 18. , both sides of the middle part of the inner wall of the reaction tank 20 are rotatably connected with driven shafts 28, and the outer wall of the driven shaft 28 is provided with a stirring rod 29. A second servo motor 24 is fixed in the middle of the top of the reaction tank 20, and the power output of the second servo motor 24 is A driving pulley 25 is fixed at the end, and a transmission belt 26 is provided on the outer wall of the driving pulley 25 .

Among them, a slope 30 is provided at the bottom of the side of the sedimentation tank 1 close to the first servo motor 3. The bottoms of the two guide rails 2 are arranged parallel to the bottom of the sedimentation tank 1. The four corners of the bottom of the first collection box 7 are rotatably connected with moving wheels 12. 12 is located in the middle between the guide rail 2 and the sedimentation tank 1. The moving wheel 12 rolls at the bottom of the guide rail 2, so that the first collection box 7 can be moved at the bottom of the sedimentation tank 1 by being pulled by the nylon rope 5.

Among them, a shovel plate 10 is fixed at the bottom of one side of the first collection box 7. The shovel plate 10 is arranged in an inclined shape. The bottom of the shovel plate 10 and the bottom of the moving wheel 12 are located on the same horizontal plane. A connecting buckle 11 is fixed in the middle of the top of the shovel plate 10. The nylon A hook 6 is fixed at the bottom of the rope 5, and the hook 6 is used in conjunction with the connecting buckle 11. By hanging the hook 6 on the connecting buckle 11, the nylon rope 5 and the first collection box 7 are connected, so that when controlling the first servo motor 3 The winding reel 4 is driven to rotate, the nylon rope 5 is rolled up, and the first collection box 7 is pulled to move. The shovel plate 10 shovels the impurities at the bottom of the sedimentation tank 1 into the first collection box 7 .

Among them, the first collection box 7 is in the shape of a hollow rectangle. There is a placement groove 8 on one side of the top of the first collection box 7. The activated carbon filter plate 9 is slidingly connected to the placement groove 8. There is a groove 31 on the top of the guide rail 2. The groove 31 is The height value is equal to the width value of the first collection box 7. The activated carbon filter plate 9 can be quickly disassembled and replaced. After collecting the bottom impurities, the first collection box 7 is reset. The first collection box 7 is located on the side of the water pump 21. When the water pump 21 pumps water, the sewage inside the sedimentation tank 1 is filtered by the activated carbon filter plate 9 and then discharged.

Among them, the vertical section of the second collection box 13 is T-shaped, and the tops of both sides of the second collection box 13 are provided with feed openings. The rollers 15 on both sides of the two floating blocks 14 are respectively attached to both sides of the inner wall of the sedimentation tank 1 , second baffles 17 are fixed at both ends of the second collection box 13. One end of the second baffle 17 is located on the same vertical plane as one side of the drum 15, and the floating block 14 provides buoyancy, so that the second collection box 13 It can stay on the top of the sewage in the sedimentation tank 1, pump and drain water through the micro water pump 18, drive the second collection box 13 to move horizontally on the top of the sewage in the sedimentation tank 1, and float the top of the sewage through the second baffle 17 and the feed port Objects are collected into the second collection box 13.

Among them, there are two driving pulleys 25, and driven pulleys 27 are fixed on the outer walls of the two driven shafts 28. The two driven pulleys 27 are located on the same vertical plane as the two driving pulleys 25, and the driven pulleys 27 and the driving pulleys 27 are respectively located on the same vertical plane. The pulley 25 is connected through a transmission belt 26 and rotates through the second servo motor 24. The transmission belt 26 drives the two driven shafts 28 to rotate.

Among them, there are multiple groups of stirring rods 29, and the multiple groups of stirring rods 29 are arranged horizontally and equidistantly. Each group of stirring rods 29 is provided with multiple stirring rods 29, which are arranged equidistantly around the circumference, and two driven shafts 28 The stirring rods 29 on the outer wall are arranged in a staggered shape, and the driven shaft 28 rotates to drive the plurality of stirring rods 29 to rotate, stirring and mixing the sewage inside the reaction tank 20, so that the chemicals react more quickly inside the reaction tank 20.

Among them, a check valve 22 is fixed at the bottom of one side of the inner wall of the reaction tank 20, and a drainage pipe 23 is connected to the bottom of the other side of the inner wall of the reaction tank 20 through a seal. A valve is provided on the outer wall of the drainage pipe 23. After the reaction is completed, the reaction tank is drained through the drainage pipe 23. The water inside 20 is discharged, and the sewage inside the reaction tank 20 is prevented from returning to the sedimentation tank 1 through the check valve 22 .

The method of using the sewage filtration device of a hydropower station is based on the above-mentioned sewage filtration device of a hydropower station and includes the following steps:

S1. Inject the sewage into the sedimentation tank 1, let it stand for 0.5-1 hour, start the first servo motor 3 and the micro water pump 18 at the same time, control the first servo motor 3 to drive the winding disk 4 to rotate, and wind up the nylon rope 5. Pull the first collection box 7 to move, the shovel plate 10 shovels the impurities at the bottom of the sedimentation tank 1 into the first collection box 7 , and provides buoyancy through the floating block 14 so that the second collection box 13 can stay on the top of the sewage in the sedimentation tank 1 , pumping and draining water through the micro water pump 18, driving the second collection box 13 to move horizontally on the top of the sewage in the sedimentation tank 1, and collecting the floating objects on the top of the sewage into the second collection box 13 through the second baffle 17 and the feed port;

S2. After the physical treatment is completed, pump the water inside the sedimentation tank 1 into the reaction tank 20 through the water pump 21, and prevent the sewage inside the reaction tank 20 from returning to the sedimentation tank 1 through the check valve 22;

S3. Pour the chemical reagents into the reaction pool 20, and start the second servo motor 24 to rotate at the same time. The transmission belt 26 drives the two driven shafts 28 to rotate. The rotation of the driven shaft 28 drives a plurality of stirring rods 29 to rotate, and the reaction The sewage inside the pool 20 is stirred and mixed, so that the chemical agent reacts more quickly inside the reaction pool 20;

S4. After the reaction is completed, drain the water inside the reaction tank 20 through the drainage pipe 23.

The specific usage and function of this embodiment:

In the present invention, sewage is first injected into the sedimentation tank 1, and after letting it stand for 0.5-1 hour, the first servo motor 3 and the micro water pump 18 are started at the same time. The hook 6 is hung on the connecting buckle 11, and the nylon rope 5 and the second A collection box 7 is connected, so that the first servo motor 3 is controlled to drive the reel 4 to rotate, the nylon rope 5 is rolled up, and the first collection box 7 is pulled to move, and the shovel plate 10 shovels the impurities at the bottom of the sedimentation tank 1 into the third Inside the first collection box 7, the floating block 14 provides buoyancy, so that the second collection box 13 can stay on the top of the sewage in the sedimentation tank 1, and pumps and drains water through the micro water pump 18, driving the second collection box 13 to collect sewage in the sedimentation tank 1. The top moves horizontally, and the floating objects on the top of the sewage are collected into the second collection box 13 through the second baffle 17 and the feed port. The floating objects on the top and the sediment at the bottom in the sedimentation tank 1 can be collected at the same time. When the first When there are a lot of impurities stored inside the collection box 7, the height of the groove 31 is equal to the width of the first collection box 7. Remove the first collection box 7 from the groove 31 and clean it. When the second collection box 13 When a large amount of internal impurities are stored, the second collection box 13 can be taken out for cleaning. After the treatment is completed, the water inside the sedimentation tank 1 is pumped into the reaction tank 20 through the water pump 21, and the check valve 22 is used to prevent the reaction tank from The sewage inside 20 is returned to the sedimentation tank 1, and finally the chemical reagents are poured into the reaction tank 20. At the same time, the second servo motor 24 is started to rotate. The transmission belt 26 drives the two driven shafts 28 to rotate, and the driven shaft 28 rotates to drive The plurality of stirring rods 29 rotate to stir and mix the sewage inside the reaction tank 20, so that the chemicals react more quickly inside the reaction tank 20. After the reaction is completed, the water inside the reaction tank 20 is discharged through the drainage pipe 23.

The embodiments of the present invention are presented for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention and design various embodiments with various modifications as are suited to the particular use contemplated.

Claims (9)

1. A sewage filtration device for a hydropower station, including a sedimentation tank (1) and a reaction tank (20). The sedimentation tank (1) and the reaction tank (20) have a water pump (21) that is sealed and connected through the bottom of the opposite side of the outer wall, It is characterized in that: guide rails (2) are provided on both sides of the inner wall of the sedimentation tank (1), a first collection box (7) is placed at the bottom of the sedimentation tank (1), and the first collection box (7) An activated carbon filter plate (9) is detachably installed on the top of the side. A first servo motor (3) is fixed in the middle of one end of the top of the sedimentation tank (1). The power output end of the first servo motor (3) is fixed with a winding. Reel (4), a nylon rope (5) is fixed on the inner wall of the reel (4), a second collection box (13) is provided on the inner wall of the sedimentation tank (1), and the second collection box (13) Floating blocks (14) are fixed at both ends, and rollers (15) are rotatably connected to both sides of the floating block (14). A first baffle (16) is fixed in the middle of the inner wall of the second collection box (13). A micro water pump (18) is fixed at the bottom of the second collection box (13), a water conduit (19) is connected through the middle of the micro water pump (18), and both sides of the middle part of the inner wall of the reaction tank (20) are rotationally connected. A driven shaft (28), a stirring rod (29) is provided on the outer wall of the driven shaft (28), and a second servo motor (24) is fixed in the middle of the top of the reaction tank (20). The second servo motor A driving pulley (25) is fixed at the power output end of (24), and a transmission belt (26) is provided on the outer wall of the driving pulley (25). 2. A sewage filtration device for hydropower stations according to claim 1, characterized in that: a slope (30) is provided at the bottom of the side of the sedimentation tank (1) close to the first servo motor (3), and two of the guide rails (2 ) bottom is arranged parallel to the bottom of the sedimentation tank (1). The four corners of the bottom of the first collection box (7) are rotatably connected with moving wheels (12). The moving wheels (12) are located between the guide rail (2) and the sedimentation tank. (1) Middle part. 3. A sewage filtering device for hydropower stations according to claim 2, characterized in that: a shovel plate (10) is fixed at the bottom of one side of the first collection box (7), and the shovel plate (10) is arranged in an inclined shape. , the bottom of the shovel plate (10) and the bottom of the moving wheel (12) are located on the same horizontal plane, a connecting buckle (11) is fixed in the middle of the top of the shovel plate (10), and a hook is fixed at the bottom of the nylon rope (5) (6), the hook (6) is used in conjunction with the connecting buckle (11). 4. A hydropower station sewage filtration device according to claim 1, characterized in that: the first collection box (7) is in a hollow rectangular shape, and a placement slot (7) is provided on one side of the top of the first collection box (7). 8), the activated carbon filter plate (9) is slidingly connected to the placement slot (8), a groove (31) is provided at the top of the guide rail (2), and the height of the groove (31) is equal to the first collection box (7) width value. 5. A sewage filtering device for hydropower stations according to claim 1, characterized in that: the vertical section of the second collection box (13) is T-shaped, and the tops of both sides of the second collection box (13) are open. There is a feed port, the two rollers (15) on both sides of the floating block (14) are respectively attached to both sides of the inner wall of the sedimentation tank (1), and both ends of the second collection box (13) are fixed There is a second baffle (17), one end of the second baffle (17) and one side of the drum (15) are located on the same vertical plane. 6. A sewage filtering device for a hydropower station according to claim 1, characterized in that: there are two driving pulleys (25), and driven pulleys (27) are fixed on the outer walls of the two driven shafts (28). ), the two driven pulleys (27) are located on the same vertical plane as the two driving pulleys (25), and the driven pulleys (27) and the driving pulleys (25) are connected by a transmission belt (26) . 7. A hydropower station sewage filtration device according to claim 1, characterized in that: the stirring rods (29) are provided with multiple groups, and the multiple groups of the stirring rods (29) are arranged horizontally and equidistantly, and the stirring rods (29) in each group are arranged at equal intervals. There are multiple stirring rods (29) arranged in a circumferential equidistant manner, and the two stirring rods (29) on the outer walls of the driven shaft (28) are arranged in a staggered manner. 8. A hydropower station sewage filtration device according to claim 1, characterized in that: a check valve (22) is fixed at the bottom of one side of the inner wall of the reaction tank (20), and a check valve (22) is fixed on the other side of the inner wall of the reaction tank (20). A drainage pipe (23) is sealed and connected through the bottom, and a valve is provided on the outer wall of the drainage pipe (23). 9. A method of using the sewage filtration device of a hydropower station according to any one of claims 1 to 8, based on the above sewage filtration device of a hydropower station, characterized in that: Includes the following steps: S1. Inject the sewage into the sedimentation tank (1), let it stand for 0.5-1 hour, start the first servo motor (3) and the micro water pump (18) at the same time, and control the first servo motor (3) to drive the winding disk (4 ) rotates, winds up the nylon rope (5), and pulls the first collection box (7) to move. The shovel plate (10) shovels the impurities at the bottom of the sedimentation tank (1) into the first collection box (7), and passes through the floating block (14) provides buoyancy so that the second collection box (13) can stay on the top of the sewage in the sedimentation tank (1), and pumps and drains water through the micro water pump (18), driving the second collection box (13) in the sedimentation tank (1) ) moves horizontally at the top of the sewage, and collects the floating objects on the top of the sewage into the second collection box (13) through the second baffle (17) and the feed port; S2. After the physical treatment is completed, pump the water inside the sedimentation tank (1) into the reaction tank (20) through the water pump (21), and prevent the sewage inside the reaction tank (20) from returning to the sedimentation tank through the check valve (22). (1) in; S3. Pour the chemical reagent into the reaction pool (20), and start the second servo motor (24) to rotate at the same time. The transmission belt (26) drives the two driven shafts (28) to rotate, and the driven shaft (28) rotates. Drive multiple stirring rods (29) to rotate to stir and mix the sewage inside the reaction tank (20), so that the chemical agents react more quickly inside the reaction tank (20); S4. After the reaction is completed, drain the water inside the reaction tank (20) through the drainage pipe (23).