An energy-saving wastewater treatment purification device
By integrating crushing, aeration, and sedimentation functions within the same chamber, the problems of high energy consumption, large footprint, and frequent filter cleaning in existing sewage treatment devices are solved, achieving energy-efficient and high-performance sewage purification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG BETTER ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-06-30
AI Technical Summary
Existing wastewater treatment purification devices require multiple transfers for treatment, consume a lot of energy from water pumps, occupy a large area of equipment, and require regular cleaning of filters, which affects the purification effect.
It achieves pulverization, aeration, and sedimentation within the same chamber, integrating pulverization, aeration, filtration, and cleaning mechanisms to reduce equipment footprint and simplify filter cleaning.
It improves the compactness of the device, reduces the labor intensity of staff, lowers energy consumption, and increases purification efficiency.
Smart Images
Figure CN224430419U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of wastewater treatment, and in particular to an energy-saving wastewater treatment purification device. Background Technology
[0002] With the acceleration of urbanization and industrialization in my country, the amount of wastewater discharged nationwide is increasing year by year. In order to improve environmental protection, purification devices are used to treat sewage.
[0003] Existing wastewater treatment purification devices, such as the energy-saving wastewater treatment purification device disclosed in utility model patent application number 202421059922.5, mainly include a wastewater treatment tank. Three sets of partition plates are fixedly connected inside the wastewater treatment tank, dividing the interior into a crushing chamber, a sedimentation chamber, a filtration chamber, and an impurity treatment chamber. Crushing blades are installed inside the crushing chamber. In use, wastewater is transported to the crushing chamber, where the crushing blades rotate to crush impurities in the wastewater. The rotation of the crushing blades also controls the rotation of a first spiral blade, which in turn transports the wastewater from top to bottom, improving wastewater transport efficiency. The wastewater then settles into the lower part of the sedimentation chamber, where it undergoes sedimentation treatment.
[0004] However, most existing purification devices require multiple transfers of wastewater for treatment, have high water pump energy consumption, occupy a large area, and require regular cleaning of the filter screens by staff, otherwise the purification effect can be easily affected. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides an energy-saving wastewater treatment purification device that not only allows crushing, aeration and sedimentation to be carried out in the same chamber, improving the compactness of the device structure, but also facilitates the cleaning of the filter screen and reduces the labor intensity of the staff.
[0006] This utility model discloses an energy-saving wastewater treatment purification device, including a sedimentation mechanism; it also includes a crushing mechanism, an aeration mechanism, a filtration mechanism, a cleaning mechanism, and a sewage discharge mechanism. The crushing mechanism is installed on the sedimentation mechanism to crush large particulate impurities in the wastewater; the aeration mechanism is installed on the crushing mechanism to aerate the wastewater; the filtration mechanism is installed on the sedimentation mechanism to filter the wastewater; the cleaning mechanism is installed on the filtration mechanism to clean the filter screen; and the sewage discharge mechanism is installed on the cleaning mechanism to discharge sludge. Wastewater is transported into the sedimentation mechanism, where the crushing mechanism crushes large particulate impurities, and the aeration mechanism simultaneously delivers air into the sedimentation mechanism to facilitate the decomposition of organic matter. After a certain period of time, the impurities in the wastewater settle. The operator then closes the crushing mechanism and opens the sedimentation mechanism to facilitate the filtration mechanism's treatment of the wastewater. The filtered wastewater is discharged, and after all the wastewater has been discharged, the cleaning mechanism is activated to clean the filtration mechanism, while simultaneously driving the sewage discharge mechanism to discharge the settled impurities from the sedimentation mechanism.
[0007] Preferably, the sedimentation mechanism includes a sedimentation tank, an inlet pipe, a U-shaped trough, two sets of hydraulic cylinders, and a baffle. The bottom of the sedimentation tank is connected to the ground, and the interior of the sedimentation tank has a cavity. A discharge port is opened on the sedimentation tank and communicates with the interior of the cavity. Positioning grooves are opened on both sides of the discharge port. The bottom of the inlet pipe communicates with the top of the sedimentation tank. The U-shaped trough is installed at the bottom of the cavity of the sedimentation tank. Both sets of hydraulic cylinders are installed on the sedimentation tank. The baffle is slidably installed in the positioning groove of the sedimentation tank and connected to the bottom of the two sets of hydraulic cylinders. The two sets of hydraulic cylinders push the baffle down to block the discharge port. Wastewater is transported into the cavity of the sedimentation tank through the inlet pipe and gradually settles in the cavity of the sedimentation tank. The settled impurities accumulate at the lowest end of the U-shaped trough. Then, the two sets of hydraulic cylinders are activated to drive the baffle to rise, so that the wastewater is transported into the filtration mechanism through the discharge port.
[0008] Preferably, the crushing mechanism includes a first motor, a dual-output shaft reducer, a first drive shaft, and cutting blades. The first motor is mounted on the sedimentation tank, and the output end of the first motor is connected to the input end of the dual-output shaft reducer. The output end of the dual-output shaft reducer is connected to the input end of the first drive shaft, and the cutting blades are mounted on the first drive shaft. When the first motor is started, the first motor drives the first drive shaft to rotate through the dual-output shaft reducer, and the first drive shaft drives the cutting blades to rotate, breaking up large particulate impurities in the wastewater.
[0009] Preferably, the aeration mechanism includes a second drive shaft, an air pump, a filter head, an air supply pipe, two sets of aeration pipes, and multiple sets of aeration heads. The output end of the dual-output shaft reducer is connected to the input end of the second drive shaft, the power output end of the second drive shaft is connected to the power input end of the air pump, the filter head is internally connected to the air inlet of the air pump, the air supply pipe is internally connected to the air outlet of the air pump, both sets of aeration pipes are installed in the cavity of the sedimentation tank and are internally connected to the air supply pipe, and multiple sets of aeration heads are respectively installed on the two sets of aeration pipes. The dual-output shaft reducer drives the second drive shaft to rotate, the second drive shaft drives the air pump to draw air, the filter head filters the drawn air, the air is transported to the multiple sets of aeration heads through the air supply pipe and the two sets of aeration pipes, and the aeration heads spray the air out to accelerate the decomposition of organic matter in the sewage.
[0010] Preferably, the filtration mechanism includes a filter box, an inspection cover, three sets of filter plates, a drain pipe, and a drain valve. The filter box is installed on the sedimentation tank and communicates with the inside of the sedimentation tank's discharge port. The inspection cover is rotatably installed on the filter box. All three sets of filter plates are installed inside the filter box. The drain pipe communicates with the inside of the filter box, and the drain valve is installed on the drain pipe. The settled wastewater enters the filter box through the discharge port. The three sets of inspection covers filter and purify the wastewater. When the operator opens the drain valve, the filtered wastewater is discharged through the drain pipe. After prolonged use, the operator opens the inspection cover to clean the filtered impurities.
[0011] Preferably, the cleaning mechanism includes two sets of guide columns, a reciprocating screw, a second motor, a reducer, a third drive shaft, two sets of first pulleys, a first belt, a moving block, and three sets of cleaning brushes. Both sets of guide columns are installed inside the filter box. The reciprocating screw is rotatably mounted on the filter box. The bottom end of the second motor is connected to the top end of the filter box, and the output end of the second motor is connected to the input end of the reducer. The output end of the reducer is connected to the input end of the third drive shaft. The two sets of first pulleys are respectively mounted on the reciprocating screw and the third drive shaft. A first belt drive is installed between the two sets of first pulleys. The moving block is slidably mounted on the two sets of guide columns and is threadedly driven by the reciprocating screw. All three sets of cleaning brushes are mounted on the moving block. When the second motor is started, it drives the third drive shaft to rotate via the reducer. The third drive shaft drives the first pulleys mounted on it to rotate. The two sets of first pulleys, through the first belt drive, further drive the reciprocating screw to rotate. The reciprocating screw drives the moving block to reciprocate on the two sets of guide columns. The moving block drives the three sets of cleaning brushes to clean the three sets of filter plates, ensuring filtration efficiency.
[0012] Preferably, the sewage discharge mechanism includes a rotating shaft, two sets of second pulleys, a second belt, spiral blades, a sewage discharge pipe, and a sewage discharge valve. The rotating shaft is rotatably installed inside the cavity of the sedimentation tank. The two sets of second pulleys are respectively installed on the rotating shaft and the third drive shaft. The second belt drive is installed between the two sets of second pulleys. The spiral blades are installed on the rotating shaft. The sewage discharge pipe is installed on the sedimentation tank and communicates with the inside of the cavity. The sewage discharge valve is installed on the sewage discharge pipe. When the operator opens the sewage discharge valve, the third drive shaft drives the second pulleys installed on it to rotate. The two sets of second pulleys drive the rotating shaft to rotate through the second belt drive. The rotating shaft drives the spiral blades to rotate, pushing the sedimented impurities at the bottom of the U-shaped trough out through the sewage discharge pipe.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: wastewater is transported into the sedimentation mechanism, the crushing mechanism crushes the large particles of impurities in the wastewater, and at the same time the aeration mechanism transports air into the sedimentation mechanism to facilitate the decomposition of organic matter. After a certain period of time, the impurities in the wastewater settle. The staff closes the crushing mechanism and opens the sedimentation mechanism to facilitate the filtration mechanism to filter the wastewater. The filtered wastewater is discharged. After all the wastewater is discharged, the cleaning mechanism is activated to clean the filtration mechanism, and at the same time, the sewage discharge mechanism drives the sewage discharge mechanism to discharge the sedimented impurities in the sedimentation mechanism. Attached Figure Description
[0014] Figure 1 This is a front view structural diagram of the present invention;
[0015] Figure 2 This is a cross-sectional isometric structural diagram of the sedimentation mechanism, filtration mechanism, and cleaning mechanism of this utility model;
[0016] Figure 3 This is a cross-sectional isometric structural diagram of the crushing mechanism and aeration mechanism of this utility model;
[0017] Figure 4 This is a partially enlarged cross-sectional isometric structural schematic diagram of the cleaning mechanism of this utility model;
[0018] Figure 5 This is a cross-sectional isometric structural diagram of the sewage discharge mechanism of this utility model.
[0019] The attached diagram is labeled as follows: 01, sedimentation mechanism; 11, sedimentation tank; 12, inlet pipe; 13, U-shaped trough; 14, hydraulic cylinder; 15, baffle; 02, pulverizing mechanism; 21, first electric motor; 22, dual-output shaft reducer; 23, first drive shaft; 24, cutting blade; 03, aeration mechanism; 31, second drive shaft; 32, air pump; 33, filter head; 34, air supply pipe; 35, aeration pipe; 36, aeration head; 04, filtration mechanism; 41, filter box. 42. Inspection cover; 43. Filter plate; 44. Drain pipe; 45. Drain valve; 05. Cleaning mechanism; 51. Guide column; 52. Reciprocating screw; 53. Second motor; 54. Reducer; 55. Third drive shaft; 56. First pulley; 57. First belt; 58. Moving block; 59. Cleaning brush; 06. Sewage discharge mechanism; 61. Rotating shaft; 62. Second pulley; 63. Second belt; 64. Spiral blade; 65. Sewage pipe; 66. Sewage valve. Detailed Implementation
[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1
[0021] This utility model discloses an energy-saving wastewater treatment purification device, including a sedimentation mechanism 01; it also includes a crushing mechanism 02, an aeration mechanism 03, a filtration mechanism 04, a cleaning mechanism 05, and a sewage discharge mechanism 06. The crushing mechanism 02 is installed on the sedimentation mechanism 01 to crush large particles of impurities in the wastewater; the aeration mechanism 03 is installed on the crushing mechanism 02 to aerate the wastewater; the filtration mechanism 04 is installed on the sedimentation mechanism 01 to filter the wastewater; the cleaning mechanism 05 is installed on the filtration mechanism 04 to clean the filter screen; and the sewage discharge mechanism 06 is installed on the cleaning mechanism 05 to discharge sludge. The sedimentation mechanism 01 includes a sedimentation tank 11. The settling tank 11 consists of an inlet pipe 12, a U-shaped trough 13, two sets of hydraulic cylinders 14, and a baffle 15. The bottom of the settling tank 11 is connected to the ground. The settling tank 11 has an internal cavity with a discharge port communicating with the cavity. Positioning grooves are located on both sides of the discharge port. The bottom of the inlet pipe 12 communicates with the top of the settling tank 11. The U-shaped trough 13 is installed at the bottom of the cavity inside the settling tank 11. Both sets of hydraulic cylinders 14 are installed on the settling tank 11. The baffle 15 is slidably installed in the positioning grooves of the settling tank 11 and connected to the bottom of the two sets of hydraulic cylinders 14. The crushing mechanism 02 includes a first motor 21, a dual-output shaft reducer 22, a first transmission shaft 23, and a cutting... The blade cutter 24 is mounted on the sedimentation tank 11. The output end of the first motor 21 is connected to the input end of the dual-output shaft reducer 22, and the output end of the dual-output shaft reducer 22 is connected to the input end of the first drive shaft 23. The blade cutter 24 is mounted on the first drive shaft 23. The aeration mechanism 03 includes a second drive shaft 31, an air pump 32, a filter head 33, an air supply pipe 34, two sets of aeration pipes 35, and multiple sets of aeration heads 36. The output end of the dual-output shaft reducer 22 is connected to the input end of the second drive shaft 31, and the power output end of the second drive shaft 31 is connected to the power input end of the air pump 32. The filter head 33 is connected to the air inlet of the air pump 32. The internal connection of the air supply pipe 34 and the exhaust port of the air pump 32 is internally connected. Both sets of aeration pipes 35 are installed in the cavity of the sedimentation tank 11 and are internally connected to the air supply pipe 34. Multiple sets of aeration heads 36 are respectively installed on the two sets of aeration pipes 35. The filtration mechanism 04 includes a filter box 41, a maintenance cover 42, three sets of filter plates 43, a drain pipe 44 and a drain valve 45. The filter box 41 is installed on the sedimentation tank 11 and is internally connected to the discharge port of the sedimentation tank 11. The maintenance cover 42 is rotatably installed on the filter box 41. All three sets of filter plates 43 are installed inside the filter box 41. The drain pipe 44 is internally connected to the filter box 41. The drain valve 45 is installed on the drain pipe 44.During operation, firstly, two sets of hydraulic cylinders 14 push the baffle 15 down to block the discharge port. Wastewater is transported into the cavity of the sedimentation tank 11 through the inlet pipe 12. The first motor 21 is started, and the first motor 21 drives the first drive shaft 23 to rotate through the dual output shaft reducer 22. The first drive shaft 23 drives the cutting blades 24 to rotate, breaking up large particles of impurities in the wastewater. The dual output shaft reducer 22 drives the second drive shaft 31 to rotate, and the second drive shaft 31 drives the air pump 32 to draw air. The filter head 33 filters the drawn-in air, and the air passes through the air supply pipe 34 and two sets of hydraulic cylinders 14 to filter the air. Aeration pipe 35 delivers air to multiple aeration heads 36, which spray air to accelerate the decomposition of organic matter in the wastewater. Impurities gradually settle in the cavity of sedimentation tank 11, and the settled impurities accumulate at the lowest end of U-shaped trough 13. Then, two sets of hydraulic cylinders 14 are activated to lift baffle 15, allowing the wastewater to be transported through the discharge port to filter box 41. Three sets of inspection covers 42 filter and purify the wastewater. The operator opens the drain valve 45, and the filtered wastewater is discharged through drain pipe 44. After prolonged use, the operator opens the inspection cover 42 to clean the filtered impurities. Example 2
[0022] like Figures 1 to 5As shown, this utility model discloses an energy-saving wastewater treatment purification device based on Embodiment 1. The cleaning mechanism 05 includes two sets of guide columns 51, a reciprocating screw 52, a second motor 53, a reducer 54, a third transmission shaft 55, two sets of first pulleys 56, a first belt 57, a moving block 58, and three sets of cleaning brushes 59. Both sets of guide columns 51 are installed inside the filter box 41. The reciprocating screw 52 is rotatably mounted on the filter box 41. The bottom end of the second motor 53 is connected to the top end of the filter box 41, and the output end of the second motor 53 is connected to the input end of the reducer 54. The output end of the reducer 54 is connected to the input end of the third transmission shaft 55. The two sets of first pulleys 56 are respectively mounted on the reciprocating screw 52 and the third transmission shaft 55. The first belt 57 is driven between the two sets of first pulleys 56. The moving block 58 is slidably mounted on the two sets of guide columns 51 and is driven by the reciprocating screw 52 through a thread. The three sets of cleaning brushes 59 are all mounted on the moving block 58. The sewage discharge mechanism 06 includes a rotating shaft 61, two sets of second pulleys 62, a second belt 63, a spiral blade 64, a sewage discharge pipe 65, and a sewage discharge valve 66. The rotating shaft 61 is rotatably mounted in the cavity of the sedimentation tank 11. The two sets of second pulleys 62 are respectively mounted on the rotating shaft 61 and the third drive shaft 55. The second belt 63 is driven between the two sets of second pulleys 62. The spiral blade 64 is mounted on the rotating shaft 61. The sewage discharge pipe 65 is mounted on the sedimentation tank 11 and communicates with the inside of the cavity. The sewage discharge valve 66 is mounted on the sewage discharge pipe 65.During operation, firstly, two sets of hydraulic cylinders 14 push the baffle 15 down to block the discharge port. Wastewater is transported to the cavity of the sedimentation tank 11 through the inlet pipe 12. The first motor 21 is started, which drives the first drive shaft 23 to rotate through the dual output shaft reducer 22. The first drive shaft 23 drives the cutting blades 24 to rotate, breaking up large particles of impurities in the wastewater. The dual output shaft reducer 22 drives the second drive shaft 31 to rotate, which drives the air pump 32 to draw air. The filter head 33 filters the drawn air. The air is transported to multiple aeration heads 36 through the air supply pipe 34 and two sets of aeration pipes 35. The aeration heads 36 spray air to accelerate the decomposition of organic matter in the wastewater. Impurities gradually settle in the cavity of the sedimentation tank 11. The settled impurities gather at the lowest end of the U-shaped trough 13. Then, the two sets of hydraulic cylinders 14 are started to lift the baffle 15, allowing the wastewater to be transported to the filter box 41 through the discharge port. Three sets of inspection covers 42 filter the wastewater. The worker opens the drain valve 45, and the filtered wastewater is discharged through the drain pipe 44. The second motor 53 is started, and the second motor 53 drives the third drive shaft 55 to rotate via the reducer 54. The third drive shaft 55 drives the first pulley 56 mounted on it to rotate. The two sets of first pulleys 56 are driven by the first belt 57, which in turn drives the reciprocating screw 52 to rotate. The reciprocating screw 52 drives the moving block 58 to move back and forth on the two sets of guide columns 51. The moving block 58 drives the three sets of cleaning brushes 59 to clean the three sets of filter plates 43, ensuring filtration efficiency. After prolonged use, the worker opens the inspection cover 42 to clean the filtered impurities. The worker opens the drain valve 66, and the third drive shaft 55 drives the second pulley 62 mounted on it to rotate. The two sets of second pulleys 62 are driven by the second belt 63, which in turn drives the rotating shaft 61 to rotate. The rotating shaft 61 drives the spiral blades 64 to rotate, pushing the sediment at the bottom of the U-shaped trough 13 out through the drain pipe 65.
[0023] The first electric motor 21, the dual output shaft reducer 22, the air pump 32, the second electric motor 53, and the reducer 54 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.
[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. An energy-saving purification device for sewage treatment, comprising a sedimentation mechanism (01); characterized in that, It also includes a crushing mechanism (02), an aeration mechanism (03), a filtration mechanism (04), a cleaning mechanism (05), and a sewage discharge mechanism (06). The crushing mechanism (02) is installed on the sedimentation mechanism (01) and crushes large particles of impurities in the sewage. The aeration mechanism (03) is installed on the crushing mechanism (02) and aerates the sewage. The filtration mechanism (04) is installed on the sedimentation mechanism (01) and filters the sewage. The cleaning mechanism (05) is installed on the filtration mechanism (04) and cleans the filter screen. The sewage discharge mechanism (06) is installed on the cleaning mechanism (05) and discharges the sludge.
2. The purification device for energy-saving sewage treatment according to claim 1, characterized in that, The sedimentation mechanism (01) includes a sedimentation tank (11), an inlet pipe (12), a U-shaped channel (13), two sets of hydraulic cylinders (14), and a baffle (15). The bottom of the sedimentation tank (11) is connected to the ground. The sedimentation tank (11) has a cavity inside. The sedimentation tank (11) has a discharge port that communicates with the cavity. Positioning slots are opened on both sides of the discharge port. The bottom of the inlet pipe (12) communicates with the top of the sedimentation tank (11). The U-shaped channel (13) is installed at the bottom of the cavity inside the sedimentation tank (11). Both sets of hydraulic cylinders (14) are installed on the sedimentation tank (11). The baffle (15) is slidably installed in the positioning slot of the sedimentation tank (11) and connected to the bottom of the two sets of hydraulic cylinders (14).
3. The energy-saving purification device for sewage treatment according to claim 2, characterized in that, The crushing mechanism (02) includes a first motor (21), a dual-output shaft reducer (22), a first drive shaft (23), and a cutting blade (24). The first motor (21) is mounted on the sedimentation tank (11). The output end of the first motor (21) is connected to the input end of the dual-output shaft reducer (22). The output end of the dual-output shaft reducer (22) is connected to the input end of the first drive shaft (23). The cutting blade (24) is mounted on the first drive shaft (23).
4. The energy-saving purification device for sewage treatment according to claim 3, characterized in that, The aeration mechanism (03) includes a second drive shaft (31), an air pump (32), a filter head (33), an air supply pipe (34), two sets of aeration pipes (35) and multiple sets of aeration heads (36). The output end of the dual output shaft reducer (22) is connected to the input end of the second drive shaft (31). The power output end of the second drive shaft (31) is connected to the power input end of the air pump (32). The filter head (33) is connected to the air inlet of the air pump (32). The air supply pipe (34) is connected to the exhaust port of the air pump (32). The two sets of aeration pipes (35) are installed in the cavity of the sedimentation tank (11) and connected to the air supply pipe (34). The multiple sets of aeration heads (36) are installed on the two sets of aeration pipes (35) respectively.
5. The energy-saving purification device for sewage treatment according to claim 2, characterized in that, The filtration mechanism (04) includes a filter box (41), an inspection cover (42), three sets of filter plates (43), a drain pipe (44), and a drain valve (45). The filter box (41) is installed on the sedimentation tank (11) and communicates with the inside of the discharge port of the sedimentation tank (11). The inspection cover (42) is rotatably installed on the filter box (41). All three sets of filter plates (43) are installed inside the filter box (41). The drain pipe (44) communicates with the inside of the filter box (41). The drain valve (45) is installed on the drain pipe (44).
6. The energy-saving purification device for sewage treatment according to claim 5, characterized in that, The cleaning mechanism (05) includes two sets of guide columns (51), a reciprocating screw (52), a second motor (53), a reducer (54), a third drive shaft (55), two sets of first pulleys (56), a first belt (57), a moving block (58), and three sets of cleaning brushes (59). Both sets of guide columns (51) are installed inside the filter box (41). The reciprocating screw (52) is rotatably mounted on the filter box (41). The bottom end of the second motor (53) is connected to the top end of the filter box (41). 3) The output end is connected to the input end of the reducer (54), the output end of the reducer (54) is connected to the input end of the third drive shaft (55), the two sets of first pulleys (56) are respectively installed on the reciprocating screw (52) and the third drive shaft (55), the first belt (57) is installed between the two sets of first pulleys (56), the moving block (58) is slidably installed on the two sets of guide columns (51) and is driven by the reciprocating screw (52) through the thread, and the three sets of cleaning brushes (59) are all installed on the moving block (58).
7. The energy-saving purification device for sewage treatment according to claim 6, characterized in that, The sewage discharge mechanism (06) includes a rotating shaft (61), two sets of second pulleys (62), a second belt (63), a spiral blade (64), a sewage discharge pipe (65), and a sewage discharge valve (66). The rotating shaft (61) is rotatably installed in the cavity of the sedimentation tank (11). The two sets of second pulleys (62) are respectively installed on the rotating shaft (61) and the third drive shaft (55). The second belt (63) is driven between the two sets of second pulleys (62). The spiral blade (64) is installed on the rotating shaft (61). The sewage discharge pipe (65) is installed on the sedimentation tank (11) and communicates with the inside of the cavity. The sewage discharge valve (66) is installed on the sewage discharge pipe (65).