Sewage treatment equipment containing flocculation stirring structure and method

Abstract

The invention belongs to the technical field of sewage treatment equipment, particularly relates to sewage treatment equipment containing a flocculation stirring structure and a method, and aims to solve the problems that the density of flocculate is reduced in the flocculation process due to the fact that bubbles are easily generated in the use process of an existing sewage treatment device, the flocculate floats upwards, and the sewage treatment efficiency is low. According to the technical scheme, the device comprises four supporting frames, the inner walls of the four supporting frames are fixedly connected with the same mounting ring, and a pressing and stirring module is arranged at the top of the mounting ring. According to the sewage treatment equipment containing the flocculation stirring structure and the sewage treatment method, sewage can be stirred, then flocculates can be rapidly precipitated through vertical movement of the pressing plate, floating of the flocculates is avoided, the using effect of the equipment is improved, and the equipment is convenient to use. And by arranging the corrugated plate, the sealing performance of the device in the using process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to sewage treatment equipment and method containing a flocculation and stirring structure. Background Art

[0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering, and is increasingly entering the daily lives of ordinary people. Classification by sewage source: Sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage, and medical sewage, while domestic sewage is sewage generated in daily life, which refers to a complex mixture of various forms of inorganic and organic matter.

[0003] The existing sewage treatment device is prone to generate bubbles during use, which causes the density of the floccules to decrease during the flocculation process, thereby causing the floccules to float, resulting in poor sedimentation and flocculation effect of the equipment. Summary of the invention

[0004] The present invention discloses a sewage treatment device and method with a flocculation and stirring structure, aiming to solve the technical problem that the existing sewage treatment device in the background technology is prone to generate bubbles during use, resulting in a decrease in the density of floccules during the flocculation process, which in turn causes the floccules to float, resulting in poor sedimentation and flocculation effect of the equipment.

[0005] The present invention proposes a sewage treatment equipment containing a flocculation and stirring structure, which includes four support frames, the inner walls of the four support frames are fixedly connected with the same mounting ring, and the top of the mounting ring is provided with a pressing and stirring module, the inner wall of the mounting ring is fixedly connected with four arc plates, and the inner walls of the four arc plates are fixedly connected with the same stirring bin, a drain pipe is provided at the bottom of the stirring bin, a valve is provided on the outer wall of the drain pipe, and a mounting hole is provided on the top of the stirring bin, a lifting module is provided on the top of one of the arc plates, and the outer wall of the stirring bin is provided with four sliding grooves.

[0006] By providing a support frame, a mounting ring, a pressing and stirring module, an arc plate, a mounting hole, a drain pipe, a valve, a sliding groove and a lifting module, the sewage is collected into the interior of the mixing bin, and the pressing and stirring module is started to stir the sewage in the mixing bin and accelerate the sedimentation of flocs. After the flocculation is completed, the lifting module is started, and the position of the water pump can be adjusted through the lifting module to extract the upper sewage after the sedimentation is completed. At the same time, a filter head is provided to prevent a small amount of flocculated sediment from being extracted; after the treatment is completed, the valve is opened, and the sewage containing sediment in the lower layer can be collected through the drain pipe for further treatment.

[0007] In a preferred embodiment, the pressing and stirring module includes a mounting plate, the mounting plate is fixedly connected to the top of the mounting ring, the top of the mounting ring is movably connected to a gear ring, and the outer wall of the mounting plate is fixedly connected to four L-shaped fixing blocks, one side outer wall of the four L-shaped fixing blocks is provided with a mounting groove, the inside of the four mounting grooves are movably connected with a rotating rod, the outer walls of the four rotating rods are fixedly connected to a driving gear and a connecting pipe, and the four driving gears are respectively meshed with the gear ring; one side outer wall of one of the L-shaped fixing blocks is provided with a circular groove, the inside of the circular groove is fixedly connected with a driving motor, the output shaft of the driving motor is connected to a driving wheel through a coupling, and one end of one of the rotating rods is provided with a driven wheel, and the outer walls of the driven wheel and the driving wheel are provided with the same connecting belt; the outer walls of the four connecting pipes are provided with a first grooved plate, the outer walls of one side of the four first grooved plates are movably connected with a second grooved plate, and the four second grooved plates are A circular hole is provided on the outer wall of one side of the plate, and shaft rods are movably connected to the inside of the four circular holes, and movable sliders are fixedly connected to the outer walls of the four shaft rods, and the four movable sliders are respectively located inside the four sliding grooves, and the outer walls of the four movable sliders are provided with corrugated plates; the outer walls of one side of the four movable sliders are fixedly connected to the same pressing plate, and a mounting hole is provided on the top of the pressing plate, and a universal motor is fixedly connected to the inner wall of the mounting hole, and the output shaft of the universal motor is connected to the stirring rod through a coupling, and the outer wall of the stirring rod is provided with two stirring frames; a plurality of mounting blocks are fixedly connected to the bottom of the pressing plate, and movable rods are movably connected to the outer walls of the opposite sides of two mounting blocks on the same side, and the outer walls of the four movable rods are provided with torsion springs, and the two ends of the four torsion springs are respectively fixedly connected to the inner walls on both sides of the plurality of mounting blocks, and the outer walls of the four movable rods are fixedly connected to rubber plates, and the outer walls of the four torsion springs are respectively in contact with the inner walls of the four rubber plates.

[0008] A pressing and stirring module is provided, which is suitable for stirring and flocculating sewage. That is, the pressing and stirring module can stir the sewage during use, and then the flocculants can be quickly precipitated by the up and down movement of the pressing plate, thereby avoiding the floating of the flocculants and increasing the use effect of the device. The corrugated plate is provided to improve the sealing of the device during use.

[0009] In a preferred solution, the lifting module includes a water pump and a rectangular block, and the water pump is located inside the mixing bin, and the rectangular block is fixedly connected to the top of one of the arc plates; the input end of the water pump is fixedly connected to a filter head, and the output end of the water pump is provided with a rubber tube, and the outer wall of the rubber tube is movably connected to a guide wheel 2; a circular groove is provided on the outer wall of one side of the rectangular block, and a servo motor is fixedly connected to the inside of the circular groove, and the output shaft of the servo motor is connected to guide wheel 1 through a coupling, and the outer walls of guide wheel 1 and guide wheel 2 are provided with the same rope.

[0010] By providing a lifting module, the lifting module is suitable for adjusting the specific position of the water pump, that is, the lifting module adjusts the specific position of the water pump when in use, so as to extract the upper sewage after sedimentation is completed. By providing a filter head, it is avoided that tiny flocs are extracted, thereby improving the use effect of the device.

[0011] A stirring method for a sewage treatment device with a flocculation stirring structure, using the sewage treatment device with a flocculation stirring structure as described above, comprises the following steps: Step 1: Collect the sewage into the mixing chamber, start the pressing and stirring module, stir the sewage in the mixing chamber, and accelerate the sedimentation of flocculants; Step 2: After the treatment is completed, the lifting module is started to adjust the position of the pump to extract the upper sewage after the sedimentation is completed. At the same time, a filter head is set to prevent a small amount of flocculated sediment from being extracted; Step 3: After the treatment is completed, open the valve and collect the sewage containing sediment in the lower layer through the drain pipe for further treatment.

[0012] From the above, it can be seen that the sewage treatment equipment containing a flocculation and stirring structure provided by the present invention can stir the sewage, and then the flocculants can be quickly precipitated by the up and down movement of the pressing plate, thereby avoiding the floating of the flocculants and increasing the use effect of the device. The sealing of the device during use is improved by setting a corrugated plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a sewage treatment device with a flocculation and stirring structure proposed by the present invention; Figure 2 This is a schematic diagram of the installation ring and stirring chamber structure of a sewage treatment equipment with a flocculation stirring structure proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a pressing stirring module of a sewage treatment equipment with a flocculation stirring structure proposed by the present invention; Figure 4 This is a schematic diagram of the second groove plate and pressing plate structure of a sewage treatment equipment with a flocculation and stirring structure proposed by the present invention; Figure 5 This is a schematic diagram of the structure of a pressing stirring module of a sewage treatment equipment with a flocculation stirring structure proposed by the present invention; Figure 6 This is a partial structural schematic diagram of a lifting module of a sewage treatment equipment with a flocculation and stirring structure proposed by the present invention; Figure 7This is a schematic diagram of the lifting module structure of a sewage treatment equipment with a flocculation and stirring structure proposed by the present invention.

[0014] In the figure: 1, support frame; 2, mounting ring; 3, pressing stirring module; 301, mounting plate; 302, L-shaped fixing block; 303, first groove plate; 304, gear ring; 305, driving gear; 306, corrugated plate; 307, rotating rod; 308, connecting pipe; 309, driven wheel; 310, connecting belt; 311, driving wheel; 312, driving motor; 313, second groove plate; 314, shaft rod; 315, stirring frame; 316, stirring rod; 317, moving Slider; 318, pressing plate; 319, universal motor; 320, mounting block; 321, rubber plate; 322, movable rod; 323, torsion spring; 4, mixing chamber; 5, arc plate; 6, drain pipe; 7, valve; 8, sliding groove; 9, mounting hole; 10, lifting module; 1001, rubber tube; 1002, servo motor; 1003, guide wheel 1; 1004, guide wheel 2; 1005, rope; 1006, rectangular block; 1007, filter head; 1008, water pump. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] The sewage treatment equipment with a flocculation and stirring structure disclosed in the present invention is mainly used in existing sewage treatment devices, which are prone to generate bubbles during use, resulting in a decrease in the density of floccules during the flocculation process, which in turn causes the floccules to float, resulting in poor sedimentation and flocculation effects of the equipment.

[0017] Reference Figure 1-Figure 7 A sewage treatment equipment with a flocculation and stirring structure includes four support frames 1, the inner walls of the four support frames 1 are fixedly connected with the same mounting ring 2, and a pressing and stirring module 3 is arranged on the top of the mounting ring 2, four arc plates 5 are fixedly connected to the inner wall of the mounting ring 2, and the inner walls of the four arc plates 5 are fixedly connected with the same stirring bin 4, a drain pipe 6 is arranged at the bottom of the stirring bin 4, a valve 7 is arranged on the outer wall of the drain pipe 6, and a mounting hole 9 is opened on the top of the stirring bin 4, a lifting module 10 is arranged on the top of one of the arc plates 5, and four sliding grooves 8 are opened on the outer wall of the stirring bin 4.

[0018] Specifically, the sewage is collected into the mixing chamber 4, and the pressing and stirring module 3 is started to stir the sewage in the mixing chamber 4 and accelerate the sedimentation of flocs. After the flocculation is completed, the lifting module 10 is started, and the position of the water pump 1008 can be adjusted through the lifting module 10 to extract the upper sewage after the sedimentation is completed. At the same time, the filter head 1007 is provided to prevent a small amount of flocculated sediment from being extracted; after the treatment is completed, the valve 7 is opened, and the sewage containing sediment in the lower layer can be collected through the drain pipe 6 for further treatment.

[0019] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5In a preferred embodiment, the pressing and stirring module 3 includes a mounting plate 301, the mounting plate 301 is fixedly connected to the top of the mounting ring 2, the top bearing of the mounting ring 2 is connected to a gear ring 304, and the outer wall of the mounting plate 301 is fixedly connected to four L-shaped fixing blocks 302, one side of the outer wall of the four L-shaped fixing blocks 302 is provided with a mounting groove, the inside of the four mounting grooves is connected to a rotating rod 307 with a bearing, the outer walls of the four rotating rods 307 are fixedly connected to driving gears 305 and connecting pipes 308, and the four driving gears 305 are respectively connected to the gear ring 30 4 are meshed; a circular groove is provided on the outer wall of one side of one of the L-shaped fixing blocks 302, a driving motor 312 is fixedly connected inside the circular groove, the output shaft of the driving motor 312 is connected to the driving wheel 311 through a coupling, and a driven wheel 309 is provided at one end of one of the rotating rods 307, and the outer walls of the driven wheel 309 and the driving wheel 311 are provided with the same connecting belt 310; the outer walls of the four connecting pipes 308 are all provided with a first groove plate 303, and the outer walls of one side of the four first groove plates 303 are all connected to the second groove plate 313 with a bearing, and the four second groove plates A circular hole is provided on the outer wall of one side of 313, and the inside of the four circular holes are all connected to the shaft rods 314 by bearings, and the outer walls of the four shaft rods 314 are all fixedly connected to the movable sliders 317, and the four movable sliders 317 are respectively located inside the four sliding grooves 8, and the outer walls of the four movable sliders 317 are all provided with corrugated plates 306; the outer walls of one side of the four movable sliders 317 are fixedly connected to the same pressing plate 318, and the top of the pressing plate 318 is provided with a mounting hole, and the inner wall of the mounting hole is fixedly connected to the universal motor 319, and the output shaft of the universal motor 319 is connected to the A stirring rod 316, and two stirring frames 315 are arranged on the outer wall of the stirring rod 316; a plurality of mounting blocks 320 are fixedly connected to the bottom of the pressing plate 318, and a movable rod 322 is connected to the outer wall bearings on the opposite sides of the two mounting blocks 320 located on the same side, and the outer walls of the four movable rods 322 are respectively provided with torsion springs 323, and the two ends of the four torsion springs 323 are respectively fixedly connected to the inner walls on both sides of the plurality of mounting blocks 320, and the outer walls of the four movable rods 322 are respectively fixedly connected to rubber plates 321, and the outer walls of the four torsion springs 323 are respectively in contact with the inner walls of the four rubber plates 321.

[0020] Specifically, the driving motor 312 is started, and the driving motor 312 drives the driving wheel 311 to rotate. Under the action of the connecting belt 310, the driven wheel 309 also starts to rotate, and the driven wheel 309 drives the rotating rod 307 to rotate. Under the action of the rotating rod 307, the driving gear 305 also starts to run. Since the four driving gears 305 are respectively meshed with the gear ring 304, the gear ring 304 also starts to rotate. Since the connecting tube 308 is fixedly connected to the outer wall of the rotating rod 307, the connecting tube 308 can drive the first groove plate 303 to rotate. The first groove plate 303 The second groove plate 313 is driven to rotate. Under the action of the second groove plate 313, the movable slider 317 is driven to move up and down inside the sliding groove 8. The up and down movement of the movable slider 317 drives the pressing plate 318 to move. During the pressing process of the pressing plate 318, the rubber plate 321 is flattened under the action of water resistance, and the floating flocculants can be pressed down to accelerate the sedimentation. During the upward movement of the pressing plate 318, under the action of the torsion spring 323, the rubber plate 321 is driven to automatically reset and start the universal motor 319, which drives the stirring rod 316 and the stirring frame 315 to start stirring. In a specific application scenario, the pressing and stirring module 3 is suitable for stirring and flocculating sewage, that is, the pressing and stirring module 3 can stir the sewage during use, and then the flocculants can be quickly precipitated by moving the pressing plate 318 up and down, thereby avoiding the flocculants from floating up and increasing the use effect of the device. The corrugated plate 306 is provided to improve the sealing of the device during use.

[0021] Reference Figure 1 , Figure 6 and Figure 7 In a preferred embodiment, the lifting module 10 includes a water pump 1008 and a rectangular block 1006, and the water pump 1008 is located inside the mixing chamber 4, and the rectangular block 1006 is fixedly connected to the top of one of the arc plates 5; the input end of the water pump 1008 is fixedly connected to the filter head 1007, and the output end of the water pump 1008 is provided with a rubber tube 1001, and the outer wall bearing of the rubber tube 1001 is connected to the guide wheel 2 1004; a circular groove is opened on the outer wall of one side of the rectangular block 1006, and a servo motor 1002 is fixedly connected to the inside of the circular groove, and the output shaft of the servo motor 1002 is connected to the guide wheel 1 1003 through a coupling, and the outer walls of the guide wheel 1 1003 and the guide wheel 2 1004 are provided with the same rope 1005.

[0022] Specifically, the lifting module 10 is opened, and the guide wheel 1003 is driven to rotate by the servo motor 1002. Under the action of the guide wheel 1003 and the guide wheel 2 1004, the rope 1005 can be rolled up, and then the specific position of the water pump 1008 is adjusted, and the water pump 1008 is started to extract the sewage on the upper layer after the sedimentation is completed through the filter head 1007 and the rubber tube 1001; In a specific application scenario, the lifting module 10 is suitable for adjusting the specific position of the water pump 1008, that is, the lifting module 10 adjusts the specific position of the water pump 1008 when in use, so as to extract the upper sewage after sedimentation. By setting the filter head 1007, it is avoided that tiny flocs are extracted, thereby improving the use effect of the device.

[0023] A stirring method for a sewage treatment device with a flocculation stirring structure, using the sewage treatment device with a flocculation stirring structure as described above, comprises the following steps: Step 1, collect sewage into the inside of the mixing bin 4, start the pressing mixing module 3, specifically, start the driving motor 312, the driving motor 312 drives the driving wheel 311 to rotate, under the action of the connecting belt 310, the driven wheel 309 also starts to rotate, the driven wheel 309 drives the rotating rod 307 to rotate, under the action of the rotating rod 307, the driving gear 305 also starts to run, because the four driving gears 305 are respectively engaged with the gear ring 304, the gear ring 304 also starts to rotate, because the connecting pipe 308 is fixedly connected to the outer wall of the rotating rod 307, the connecting pipe 308 can drive the first groove plate 303 rotates, the first groove plate 303 drives the second groove plate 313 to rotate, and under the action of the second groove plate 313, the movable slider 317 is driven to move up and down inside the sliding groove 8, and the movable slider 317 moves up and down to drive the pressing plate 318 to move, and when the pressing plate 318 is pressed down, the rubber plate 321 is flattened under the action of water resistance, and the floating flocculants can be pressed down to accelerate the sedimentation, and when the pressing plate 318 moves up, under the action of the torsion spring 323, the rubber plate 321 is driven to automatically reset and start the universal motor 319, which will drive the stirring rod 316 and the stirring frame 315 to start stirring; Step 2, open the lifting module 10, and drive the guide wheel 1003 to rotate through the servo motor 1002. Under the action of the guide wheel 1003 and the guide wheel 2 1004, the rope 1005 can be rolled up, and then the specific position of the water pump 1008 can be adjusted, and the water pump 1008 is started to extract the upper sewage after the sedimentation is completed through the filter head 1007 and the rubber tube 1001; Step 3: After the treatment is completed, open the valve (7) and collect the sewage containing sediment in the lower layer through the drain pipe (6) for further treatment.

[0024] The above description 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 sewage treatment device with a flocculation and stirring structure, comprising four support frames (1), characterized in that: The inner walls of the four support frames (1) are fixedly connected to a same mounting ring (2), and a pressing stirring module (3) is arranged on the top of the mounting ring (2), the inner wall of the mounting ring (2) is fixedly connected to four arc-shaped plates (5), and the inner walls of the four arc-shaped plates (5) are fixedly connected to a same stirring chamber (4), a drain pipe (6) is arranged at the bottom of the stirring chamber (4), a valve (7) is arranged on the outer wall of the drain pipe (6), and a mounting hole (9) is provided on the top of the stirring chamber (4), a lifting module (10) is arranged on the top of one of the arc-shaped plates (5), and four sliding grooves (8) are arranged on the outer wall of the stirring chamber (4).

2. The sewage treatment equipment with flocculation and stirring structure according to claim 1, characterized in that: The pressing and stirring module (3) comprises a mounting plate (301), the mounting plate (301) being fixedly connected to the top of the mounting ring (2), the top of the mounting ring (2) being movably connected to a gear ring (304), and the outer wall of the mounting plate (301) being fixedly connected to four L-shaped fixing blocks (302), one side outer wall of each of the four L-shaped fixing blocks (302) being provided with a mounting groove, the interior of each of the four mounting grooves being movably connected to a rotating rod (307), the outer walls of each of the four rotating rods (307) being fixedly connected to a driving gear (305) and a connecting pipe (308), and the four driving gears (305) being respectively meshed with the gear ring (304).

3. The sewage treatment equipment with flocculation and stirring structure according to claim 2 is characterized in that: A circular groove is formed on an outer wall of one side of one of the L-shaped fixing blocks (302), a driving motor (312) is fixedly connected to the inside of the circular groove, an output shaft of the driving motor (312) is connected to a driving wheel (311) via a coupling, and a driven wheel (309) is provided at one end of one of the rotating rods (307), and the outer walls of the driven wheel (309) and the driving wheel (311) are provided with a same connecting belt (310).

4. The sewage treatment equipment with flocculation and stirring structure according to claim 3 is characterized in that: The outer walls of the four connecting pipes (308) are each provided with a first grooved plate (303), one side outer wall of the four first grooved plates (303) is movably connected to a second grooved plate (313), and one side outer wall of the four second grooved plates (313) is provided with a circular hole, the inside of the four circular holes are each movably connected to an axle rod (314), the outer walls of the four axle rods (314) are each fixedly connected to a movable slider (317), the four movable sliders (317) are respectively located inside the four sliding grooves (8), and the outer walls of the four movable sliders (317) are each provided with a corrugated plate (306).

5. The sewage treatment equipment with flocculation and stirring structure according to claim 4, characterized in that: The outer wall of one side of the four movable sliders (317) is fixedly connected to a same pressing plate (318), a mounting hole is provided at the top of the pressing plate (318), a universal motor (319) is fixedly connected to the inner wall of the mounting hole, an output shaft of the universal motor (319) is connected to a stirring rod (316) via a coupling, and two stirring frames (315) are provided on the outer wall of the stirring rod (316).

6. The sewage treatment equipment with flocculation and stirring structure according to claim 5, characterized in that: The bottom of the pressing plate (318) is fixedly connected to a plurality of mounting blocks (320), and outer walls of two mounting blocks (320) on the same side are movably connected to movable rods (322), and the outer walls of the four movable rods (322) are each provided with a torsion spring (323), and the two ends of the four torsion springs (323) are respectively fixedly connected to the inner walls of the plurality of mounting blocks (320), and the outer walls of the four movable rods (322) are respectively fixedly connected to the inner walls of the four rubber plates (321). The outer walls of the four torsion springs (323) are respectively in contact with the inner walls of the four rubber plates (321).

7. The sewage treatment equipment with flocculation and stirring structure according to claim 1, characterized in that: The lifting module (10) comprises a water pump (1008) and a rectangular block (1006), wherein the water pump (1008) is located inside the mixing chamber (4), and the rectangular block (1006) is fixedly connected to the top of one of the arc-shaped plates (5).

8. The sewage treatment equipment with flocculation and stirring structure according to claim 7, characterized in that: The input end of the water pump (1008) is fixedly connected to a filter head (1007), and the output end of the water pump (1008) is provided with a rubber tube (1001), and the outer wall of the rubber tube (1001) is movably connected to a second guide wheel (1004).

9. The sewage treatment equipment with flocculation and stirring structure according to claim 8, characterized in that: A circular groove is provided on the outer wall of one side of the rectangular block (1006), a servo motor (1002) is fixedly connected inside the circular groove, an output shaft of the servo motor (1002) is connected to a guide wheel 1 (1003) via a coupling, and the outer walls of the guide wheel 1 (1003) and the guide wheel 2 (1004) are provided with a same rope (1005).

10. A stirring method for a sewage treatment device with a flocculation stirring structure, using the sewage treatment device with a flocculation stirring structure as claimed in claim 9, characterized in that: The steps include: Step 1: Collect the sewage into the stirring chamber (4), and start the pressing stirring module (3) to stir the sewage in the stirring chamber (4) and accelerate the sedimentation of flocculants; Step 2: After the treatment is completed, the lifting module (10) is started to adjust the position of the pump (1008) to extract the upper sewage after the sedimentation is completed. At the same time, a filter head (1007) is provided to prevent a small amount of flocculated sediment from being extracted; Step 3: After the treatment is completed, open the valve (7) and collect the sewage containing sediment in the lower layer through the drain pipe (6) for further treatment.

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