Turbulence-reducing multi-stage pretreatment filtration apparatus and method for high-turbidity wastewater

Abstract

The application discloses a turbulent flow reduction multi-stage pretreatment filtering equipment and method for high-turbidity sewage, relates to the technical field of sewage treatment, and comprises a first filtering treatment device, a second filtering treatment device arranged below the first filtering treatment device, a pressurizing filtering device arranged in the second filtering treatment device, a turbulent flow reduction filtering device arranged below the second filtering treatment device, and a filtering treatment mechanism arranged in the turbulent flow reduction filtering device. The second filtering treatment device comprises a collecting box, the pressurizing filtering device is arranged below the collecting box in a counterposed mode, and a second sundry collecting box is fixedly arranged at the top of the pressurizing filtering device. The first filtering treatment device is used for primary filtration, the second filtering treatment device is used for secondary filtration, the pressurizing filtering device is used for pressurization, the turbulent flow reduction filtering device is used for re-filtration and turbulent flow reduction, and the sewage filtration effect is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage pretreatment filtration device and method for high-turbidity wastewater with reduced turbulence. Background Technology

[0002] Wastewater pretreatment is the first critical step in the wastewater treatment process. Its core purpose is to remove larger solid impurities from the wastewater that may damage or interfere with subsequent treatment units. Filtration, as one of the core pretreatment methods, mainly ensures the stable operation of subsequent processes through the principle of physical sieving. Through a series of progressively fine pretreatment filtrations, most physical impurities in the wastewater are effectively removed, significantly reducing the load on subsequent biological treatment units, protecting critical equipment, and laying a solid foundation for the efficient and stable operation of the entire wastewater treatment plant. It is the primary guarantee for ensuring that the final effluent meets discharge standards.

[0003] The invention disclosed in the authorization announcement number CN115253440B is a water collection device and treatment method for sewage pretreatment. The invention uses multi-stage classification filtration, classification storage and pumping, and internal circulation cleaning mechanism. The multi-stage and classification filtration unit, from the grid plate to the filter screen of different precision, can effectively separate suspended solids of different specifications. The filtered sewage is classified and stored in different storage tanks and transported by an independent pumping system.

[0004] The above-mentioned device can achieve the purpose of pre-treatment and filtration of sewage. However, the device does not have a mechanism for collecting debris in the sewage. If it is not cleaned for a long time, the pre-treatment and filtration effect will be reduced. In addition, the efficiency of cleaning the filter screen with a cleaning water pump is low. When there is a lot of debris blocking the filter screen, it cannot be effectively cleaned. Therefore, a multi-stage pre-treatment and filtration device for sewage is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage pretreatment filtration device and method for high-turbidity wastewater to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-stage pretreatment filtration device for high-turbidity wastewater includes a first filtration device, a second filtration device located below the first filtration device, a pressurization filtration device located inside the second filtration device, a deturbulence filtration device located below the second filtration device, and a filtration mechanism located inside the deturbulence filtration device.

[0008] The second filtration device includes a collection box, with a booster filter device positioned opposite each other below the collection box. A second debris collection box is fixedly mounted on top of the booster filter device, and a second outlet pipe is located on the left side of the second debris collection box. A second fixing block is fixedly mounted on the booster filter device, and an electric push rod is fixedly mounted above the second fixing block. An electromagnetic adsorption device that cooperates with the two booster filters is slidably mounted on the output shaft of the electric push rod. A one-way valve is located at the bottom of the booster filter device. A water pump is located above the turbulence reduction filter device. The turbulence reduction filter device is connected to the water pump inlet through a first inlet pipe, and the water pump outlet is connected to the two booster filters through a connecting branch pipe. A first solenoid valve is mounted on the connecting branch pipe.

[0009] As a further aspect of the present invention: the first filtration device includes a first outer shell, a first cover plate is provided on the top of the first outer shell, a sewage inlet pipe is provided on the top of the first cover plate, a first fixing block is fixedly provided on the right side of the first outer shell, a first drive motor is provided on the top of the first fixing block, two debris removal rollers are arranged opposite each other on the inner side of the first outer shell and the two debris removal rollers are arranged alternately, the output shaft of the first drive motor is connected to the debris removal rollers through a gear transmission mechanism, a first debris discharge hole is provided at the bottom of both sides of the first outer shell, a first debris collection box is provided at the bottom of both sides of the first outer shell, and a first water outlet pipe is provided on the end face of the first debris collection box.

[0010] As a further embodiment of the present invention: the turbulence reduction filtration device includes a second outer shell, a flow-expanding shell is provided on the right side of the second outer shell, a third outer shell is provided on the right side of the flow-expanding shell, a first perforated flower wall and a second perforated flower wall are respectively provided at both ends of the inner side of the third outer shell, a filtration processing mechanism is provided between the first perforated flower wall and the second perforated flower wall located within the third outer shell, a filtration processing mechanism is provided at the right end of the second outer shell, and a main drain pipe is provided on the right side of the third outer shell.

[0011] As a further embodiment of the present invention: a first sludge pipe is provided below the second outer shell, and a second solenoid valve is provided on the first sludge pipe; a second sludge pipe is provided below the third outer shell, and a third solenoid valve is provided on the second sludge pipe.

[0012] As a further embodiment of the present invention: the pressurized filtration device includes an upper cylinder, a tempered plexiglass tube disposed below the upper cylinder, and a lower cylinder disposed below the tempered plexiglass tube. An upper limit fixing block is fixedly disposed at the bottom of the upper cylinder, and a lower limit fixing block is fixedly disposed at the top of the lower cylinder. A through shaft is slidably disposed within the upper and lower limit fixing blocks, and the axis of the through shaft is the same as the axis of the upper cylinder, the tempered plexiglass tube, and the lower cylinder. The upper and lower limit fixing blocks are located on the through shaft and rotated by a sealed bearing. The device is equipped with two supports, and magnetic rings that cooperate with the electromagnetic adsorption device are fixedly installed on the outer side of the two supports. The outer diameter of the magnetic rings is the same as the inner diameter of the tempered organic glass tube. A first filter screen is rotatably installed on the through shaft above the upper limit fixing block through a sealed bearing. Several second debris discharge holes are opened on the inner wall of the upper cylinder. A movable baffle that cooperates with the second debris discharge holes is fixedly installed on the outer edge of the first filter screen. A guide impeller is fixedly installed above the first filter screen at the upper end of the through shaft, and a transmission impeller is fixedly installed below the lower limit fixing block at the lower end of the through shaft.

[0013] As a further embodiment of the present invention: a plurality of balls are embedded on the end face between the upper limit fixing block and the lower limit fixing block.

[0014] As a further embodiment of the present invention: the filtration mechanism includes a lower fixed plate and an upper fixed plate, a second filter screen is disposed between the lower fixed plate and the upper fixed plate, a threaded rod is rotatably disposed on one side of the upper fixed plate, a movable seat is threadedly mounted on the threaded rod, a sliding rod is disposed on one side of the lower fixed plate, a sliding sleeve is disposed on the sliding rod, the movable seat is fixedly connected to the sliding sleeve by a connecting rod, a brush that cooperates with the second filter screen is fixedly disposed on the connecting rod, a third fixed block is fixedly disposed opposite to the outside of the turbulence reduction filtration device, a second drive motor is fixedly disposed between adjacent third fixed blocks, and the threaded rod is connected to the output shaft of the second drive motor by a coupling.

[0015] This invention also provides a multi-stage pretreatment filtration method for high-turbidity wastewater with reduced turbulence, comprising the following steps:

[0016] 1) For the initial filtration treatment of sewage, the high turbidity sewage is transported to the first filtration treatment device through the sewage inlet pipe. Two debris removal rollers are used to remove larger debris from the high turbidity sewage. The larger debris is collected from the first debris discharge hole into the first debris collection box. After the first filtration, the sewage enters the second filtration treatment device.

[0017] 2) After primary filtration, the wastewater is collected in the collection box and then diverted to the booster filter. The wastewater after primary filtration drives the guide impeller to rotate, so that the wastewater is evenly sprayed on the first filter screen, and then the wastewater is filtered a second time. The water pump pumps the wastewater in the second shell into the booster filter, which drives the wastewater in the collection box to feed into the second shell.

[0018] 3) When the first filter screen becomes clogged, the electromagnetic adsorption device is activated to adsorb the magnetic ring. The electric push rod lifts the electromagnetic adsorption device, which in turn moves the baffle and the first filter screen. At this time, the guide impeller and the transmission impeller are still rotating. The electric push rod moves back and forth a short distance to clean the dirt clogging the first filter screen.

[0019] 4) After secondary filtration, the wastewater is transported to the second outer shell through a one-way valve, and then filtered through the second filter screen in the filtration treatment mechanism. It is then de-velocated and de-turbulentized at the flow expansion shell. The first perforated flower wall further de-turbulentizes the wastewater after it has been slowed down. It then passes through the filtration treatment mechanism for the second time. The second perforated flower wall further de-turbulentizes the wastewater after it has been filtered again, and then it is discharged to the outside through the main drain pipe.

[0020] As a further aspect of the present invention: when the second filter screen needs to be blocked, the connecting rod and brush are moved by the second drive motor to clean the dirt left on the second filter screen.

[0021] As a further aspect of the present invention: when sludge accumulates below the second and third outer shells, it is cleaned externally through the first and second sludge pipes.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. The wastewater undergoes primary filtration through the first filtration device, secondary filtration through the second filtration device, pressurization filtration device pressurizes the wastewater, and turbulence reduction filtration device performs secondary filtration and reduces turbulence, thus enabling the wastewater to be filtered through horizontal flow and improving the wastewater filtration effect.

[0024] 2. Using the first drive motor as a power source, two debris removal rollers are driven to roll alternately. Highly polluted sewage is fed into the first outer shell from the sewage inlet pipe. The two debris removal rollers feed larger debris in the highly polluted sewage to the first debris discharge hole. The first debris collection box collects the larger debris, thereby achieving the purpose of preliminary filtration.

[0025] 3. The wastewater after the initial filtration is collected by the collection box. The pressure filter performs secondary filtration on the wastewater. The water pump draws the wastewater from the turbulence reduction filter and injects it into the pressure filter. The high flow rate drives the low flow rate, thereby increasing the flow rate of the wastewater in the pressure filter. The one-way valve plays a one-way guiding role to prevent wastewater backflow.

[0026] 4. Wastewater is filtered through two filtration mechanisms. The expansion shell plays a preliminary role in slowing the flow. The first perforated flower wall further reduces the turbulence of the slowed-flow wastewater, which then passes through the filtration mechanism again. The second perforated flower wall further reduces the turbulence of the filtered wastewater. The sludge accumulated under the second and third outer shells is cleaned out through the first and second sludge pipes, which facilitates the maintenance of the device and extends its service life.

[0027] 5. The wastewater after primary filtration is guided to the first filter screen by the guide impeller. The power of the guide impeller comes partly from the wastewater inlet and partly from the high-velocity wastewater in the connecting branch pipe, which accelerates the flow of wastewater in the pipe, causing the drive impeller to rotate faster and thus increasing the speed of the drive impeller. This allows the wastewater to be sprayed onto the first filter screen over the largest area, improving the wastewater filtration effect. When the first filter screen needs cleaning, the electromagnetic adsorption device is activated to attract the magnetic ring. The electric push rod lifts the electromagnetic adsorption device, which in turn moves the baffle and the first filter screen upwards. At this time, the guide impeller and the drive impeller are still rotating (but the flow rate is reduced because the wastewater can be discharged from the second debris discharge hole). The electric push rod moves back and forth a short distance (the backwashing effect of the wastewater and the sweeping effect of the guide impeller) to clear the dirt clogging the first filter screen. Then, the electric push rod resets the magnetic ring, thus completing the cleaning of the first filter screen.

[0028] 6. The second drive motor is used as a power source to drive the connecting rod and brush to move, which facilitates the cleaning of dirt left on the second filter screen, reduces the risk of clogging of the second filter screen, and also improves the wastewater treatment efficiency of the second filter screen. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0030] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0031] Figure 3 This is a top view of the structure of the present invention.

[0032] Figure 4 This is a three-dimensional structural diagram of the first filtration device in this invention.

[0033] Figure 5 This is a partial three-dimensional structural diagram of the first filtration device in this invention.

[0034] Figure 6 This is a three-dimensional structural diagram of the second filtration device in this invention.

[0035] Figure 7This is another three-dimensional structural schematic diagram of the second filtration device in this invention.

[0036] Figure 8 This is an exploded view of the pressurized filtration device in this invention.

[0037] Figure 9 This is a cross-sectional three-dimensional structural diagram of the pressure boosting and filtration device in this invention.

[0038] Figure 10 This is a partial three-dimensional structural diagram of the turbulence reduction and filtration device in this invention.

[0039] Figure 11 This is a three-dimensional structural diagram of the filtration mechanism in this invention.

[0040] Figure reference numerals: 1. First filtration device; 11. First outer shell; 12. First cover plate; 13. Sewage inlet pipe; 14. First fixing block; 15. First drive motor; 16. Gear transmission mechanism; 17. Debris removal roller; 18. First debris discharge hole; 19. First debris collection box; 110. First outlet pipe; 2. Second filtration device; 21. Collection box; 22. Second debris collection box; 23. Second outlet pipe; 24. Electromagnetic adsorption device; 25. Second fixing block; 26. Electric push rod; 27. One-way valve; 28. First inlet pipe; 29. ​​Water pump; 210. Connecting branch pipe; 211. First solenoid valve; 3. Turbulence reduction filtration device; 31. Second outer shell; 32. Flow expansion shell; 33. Third outer shell; 34. First perforated flower wall; 3 5. Second perforated flower wall; 36. Main drain pipe; 37. First sludge pipe; 38. Second solenoid valve; 39. Second sludge pipe; 310. Third solenoid valve; 4. Pressure boosting filter device; 41. Upper cylinder; 42. Second debris discharge hole; 43. Tempered plexiglass tube; 44. Lower cylinder; 45. Movable baffle; 46. Guide impeller; 47. First filter screen; 48. Upper limit fixing block; 49. Support; 410. Magnetic ring; 411. Lower limit fixing block; 412. Transmission impeller; 413. Through shaft; 5. Filtration treatment mechanism; 51. Lower fixing plate; 52. Second filter screen; 53. Upper fixing plate; 54. Threaded rod; 55. Movable seat; 56. Sliding rod; 57. Sliding sleeve; 58. Connecting rod; 59. Brush; 510. Second drive motor; 511. Third fixing block. Detailed Implementation

[0041] The following embodiments will describe the present invention in detail with reference to the accompanying drawings. In the drawings or description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this invention are merely illustrative and not intended to limit the scope of the invention. Any obvious modifications or changes made to this invention do not depart from the spirit and scope of the invention.

[0042] Example

[0043] Please see Figures 1-11 In this embodiment of the invention, a multi-stage pretreatment filtration device for high-turbidity wastewater includes a first filtration device 1, a second filtration device 2 disposed below the first filtration device 1, a pressurized filtration device 4 disposed within the second filtration device 2, and a deturbulence-reducing filtration device 3 disposed below the second filtration device 2. The deturbulence-reducing filtration device 3 is equipped with a filtration mechanism 5. The first filtration device 1 performs primary filtration, the second filtration device 2 performs secondary filtration, the pressurized filtration device 4 serves to increase pressure, and the deturbulence-reducing filtration device 3 serves to perform secondary filtration and reduce turbulence, thereby enabling the wastewater to be filtered through horizontal flow and improving the wastewater filtration effect.

[0044] The first filtration device 1 includes a first outer shell 11, a first cover plate 12 on top of the first outer shell 11, a sewage inlet pipe 13 on top of the first cover plate 12, a first fixing block 14 fixedly mounted on the right side of the first outer shell 11, a first drive motor 15 mounted on top of the first fixing block 14, and two debris removal rollers 17 arranged opposite each other on the inner side of the first outer shell 11, with the two debris removal rollers 17 being staggered. The output shaft of the first drive motor 15 is connected to the debris removal rollers 17 via a gear transmission mechanism 16. A first debris discharge hole 18 is provided on the bottom side. A first debris collection box 19 is provided on the lower sides of the first outer shell 11. A first water outlet pipe 110 is provided on the end face of the first debris collection box 19. The first drive motor 15 is used as a power source to drive two debris removal rollers 17 to roll alternately. Highly polluted sewage is fed into the first outer shell 11 from the sewage inlet pipe 13. The two debris removal rollers 17 feed larger debris in the highly polluted sewage to the first debris discharge hole 18. The first debris collection box 19 is used to collect the larger debris, thereby achieving the purpose of preliminary filtration.

[0045] The second filtration device 2 includes a collection box 21, with a pressure-boosting filtration device 4 positioned opposite each other below the collection box 21. A second debris collection box 22 is fixedly mounted on the top of the pressure-boosting filtration device 4, and a second outlet pipe 23 is located on the left side of the second debris collection box 22. A second fixing block 25 is fixedly mounted on the pressure-boosting filtration device 4, and an electric push rod 26 is fixedly mounted above the second fixing block 25. An electromagnetic adsorption device 24, which cooperates with the two pressure-boosting filtration devices 4, is slidably mounted on the output shaft of the electric push rod 26. A one-way valve 27 is located at the bottom of the pressure-boosting filtration device 4. The turbulence-reducing filtration device 3... A water pump 29 is installed in the unit. The inlet of the water pump 29 is connected to the turbulence reduction filter 3 through the first inlet pipe 28. The outlet of the water pump 29 is connected to two pressure boosting filter devices 4 through the connecting branch pipe 210. The connecting branch pipe 210 is equipped with a first solenoid valve 211. The wastewater after the first filtration is collected through the collection box 21. The pressure boosting filter devices 4 perform secondary filtration on the wastewater. The water pump 29 draws the wastewater from the turbulence reduction filter 3 and injects it into the pressure boosting filter devices 4. The high flow rate drives the low flow rate, thereby increasing the flow rate of the wastewater in the pressure boosting filter devices 4. The one-way valve 27 plays a one-way guiding role to prevent wastewater backflow.

[0046] The turbulence reduction filtration device 3 includes a second outer shell 31, a flow-expanding shell 32 is provided on the right side of the second outer shell 31, and a third outer shell 33 is provided on the right side of the flow-expanding shell 32. A first perforated decorative wall 34 and a second perforated decorative wall 35 are respectively provided at both ends of the inner side of the third outer shell 33. A filtration mechanism 5 is provided between the first perforated decorative wall 34 and the second perforated decorative wall 35 within the third outer shell 33. The filtration mechanism 5 is provided at the right end of the second outer shell 31. A main drain pipe 36 is provided on the right side of the third outer shell 33. A first sludge pipe 37 is provided below the second outer shell 31, and a... A second solenoid valve 38 is provided, and a second sludge pipe 39 is provided below the third outer shell 33. A third solenoid valve 310 is provided on the second sludge pipe 39. The sewage is filtered through two filtration treatment mechanisms 5. The flow-expanding shell 32 plays a preliminary role in slowing down the flow. The first perforated flower wall 34 further reduces the turbulence of the slowed-down sewage, and then it is filtered again through the filtration treatment mechanism 5. The second perforated flower wall 35 further reduces the turbulence of the filtered sewage. The sludge accumulated below the second outer shell 31 and the third outer shell 33 is cleaned out through the first sludge pipe 37 and the second sludge pipe 39, which facilitates the maintenance of the device and extends the service life of the device.

[0047] The pressurized filtration device 4 includes an upper cylinder 41, a tempered plexiglass tube 43 below the upper cylinder 41, and a lower cylinder 44 below the tempered plexiglass tube 43. An upper limit fixing block 48 is fixedly installed at the bottom of the upper cylinder 41, and a lower limit fixing block 411 is fixedly installed at the top of the lower cylinder 44. A plurality of ball bearings are embedded on the end face between the upper limit fixing block 48 and the lower limit fixing block 411. A through shaft 413 is slidably installed inside the upper limit fixing block 48 and the lower limit fixing block 411, and the axis of the through shaft 413 is aligned with the axes of the upper cylinder 41, the tempered plexiglass tube 43, and the lower cylinder 44. Similarly, two brackets 49 are rotatably mounted on the through shaft 413 between the upper limit fixing block 48 and the lower limit fixing block 411 via sealed bearings. Magnetic rings 410, which cooperate with the electromagnetic adsorption device 24, are fixedly installed on the outer sides of the two brackets 49, and the outer diameter of the magnetic rings 410 is the same as the inner diameter of the tempered organic glass tube 43. A first filter screen 47 is rotatably mounted on the through shaft 413 above the upper limit fixing block 48 via sealed bearings. Several second debris discharge holes 42 are opened on the inner wall of the upper cylinder 41. A movable baffle 45, which cooperates with the second debris discharge holes 42, is fixedly installed on the outer edge of the first filter screen 47. The through shaft 411... A guide impeller 46 is fixedly installed at the upper end of the shaft 413 above the first filter screen 47, and a transmission impeller 412 is fixedly installed at the lower end of the shaft 413 below the lower limit fixing block 411. The guide impeller 46 guides the wastewater after the initial filtration to the first filter screen 47. The power of the guide impeller 46 comes partly from the wastewater inlet and partly from the high-velocity wastewater in the connecting branch pipe 210, which drives the wastewater in the pipe to accelerate its flow rate, thereby accelerating the rotation of the transmission impeller 412 and increasing its speed. This allows the wastewater to be sprayed onto the first filter screen 47 over the largest area, improving the wastewater filtration effect. 7. When cleaning is required, the electromagnetic adsorption device 24 is activated to adsorb the magnetic ring 410. The electric push rod 26 lifts the electromagnetic adsorption device 24, which in turn moves the baffle 45 and the first filter screen 47 upwards. At this time, the guide impeller 46 and the transmission impeller 412 are still rotating (but the flow rate is reduced because the sewage can be discharged to the outside through the second debris discharge hole 42). The electric push rod 26 moves back and forth over a short distance (the backwashing effect of the sewage and the sweeping effect of the guide impeller 46) to clean the dirt blocking the first filter screen 47. Then, the electric push rod 26 resets the magnetic ring 410, thereby completing the cleaning of the first filter screen 47.

[0048] The filtration mechanism 5 includes a lower fixed plate 51 and an upper fixed plate 53. A second filter screen 52 is disposed between the lower fixed plate 51 and the upper fixed plate 53. A threaded rod 54 is rotatably disposed on one side of the upper fixed plate 53, and a movable seat 55 is threadedly mounted on the threaded rod 54. A sliding rod 56 is disposed on one side of the lower fixed plate 51, and a sliding sleeve 57 is disposed on the sliding rod 56. The movable seat 55 and the sliding sleeve 57 are fixedly connected by a connecting rod 58. A hair-like object that mates with the second filter screen 52 is fixedly disposed on the connecting rod 58. Brush 59, a third fixed block 511 is fixedly arranged on the outer side of the turbulence reduction filter device 3, and a second drive motor 510 is fixedly arranged between adjacent third fixed blocks 511. The threaded rod 54 is connected to the output shaft of the second drive motor 510 through a coupling. The second drive motor 510 is used as a power source to drive the connecting rod 58 and brush 59 to move, which facilitates the cleaning of the filtered dirt on the second filter screen 52, reduces the risk of the second filter screen 52 being blocked, and also improves the sewage treatment efficiency of the second filter screen 52.

[0049] When the device is in use, high-turbidity wastewater enters through the wastewater inlet pipe 13. The first drive motor 15 is started, driving the two debris removal rollers 17 to rotate and clean larger debris from the wastewater. The larger debris is fed through the first debris discharge hole 18 into the first debris collection box 19. After initial filtration, the wastewater falls into the collection box 21. The water pump 29 is started, feeding the wastewater from the second outer casing 31 into the pressure-boosting filter device 4. The wastewater in the collection box 21 impacts the guide impeller 46, causing it to spray onto the first filter screen 47 for secondary filtration. The water pump 29 pumps the wastewater, driving the wastewater in the collection box 21 into the second outer casing 31, increasing the flow velocity of the wastewater at the first filter screen 47. The high-velocity wastewater drives the drive impeller 412 to rotate, further accelerating the rotation of the guide impeller 46, resulting in more even spraying of the wastewater. After secondary filtration, the wastewater passes through the second filter screen 52 in the filtration treatment mechanism 5 for further filtration. The wastewater undergoes de-speeding and de-turbulence treatment at the expansion shell 32. The first perforated flower wall 34 further reduces turbulence after the slow-flowing wastewater. Then, it is filtered a second time by the filtration treatment mechanism 5. The second perforated flower wall 35 further reduces turbulence after the second filtration. Finally, it is discharged to the outside through the main drain pipe 36. The sludge accumulated under the second outer shell 31 and the third outer shell 33 is cleaned out through the first sludge pipe 37 and the second sludge pipe 39. When the first filter screen 47 needs cleaning, the electromagnetic adsorption device 24 is activated to adsorb the magnetic ring 410. The electric push rod 26 lifts the electromagnetic adsorption device 24, which in turn moves the baffle 45 and the first filter screen 47. At this time, the guide impeller 46 and the transmission impeller 412 are still rotating. The electric push rod 26 moves back and forth over a short distance to clean the dirt blocking the first filter screen 47. When the second filter screen 52 needs cleaning, the second drive motor 510 can drive the connecting rod 58 and the brush 59 to move and clean the dirt retained on the second filter screen 52.

[0050] The present invention also provides a method for the above-mentioned multi-stage pretreatment filtration of high-turbidity wastewater with reduced turbulence, comprising the following steps:

[0051] 1) For the initial filtration treatment of sewage, the high turbidity sewage is transported to the first filtration treatment device 1 through the sewage inlet pipe 13. The larger impurities in the high turbidity sewage are removed by the rotation of two impurity removal rollers 17. The larger impurities are collected from the first impurity discharge hole 18 into the first impurity collection box 19. After the first filtration, the sewage enters the second filtration treatment device 2.

[0052] 2) After primary filtration, the wastewater is collected at the collection box 21 and then diverted to the pressurized filtration device 4. The wastewater after primary filtration drives the guide impeller 46 to rotate, so that the wastewater is evenly sprayed on the first filter screen 47, and then the wastewater is filtered a second time. The water pump 29 pumps the wastewater in the second housing 31 to the pressurized filtration device 4, and drives the wastewater in the collection box 21 to feed into the second housing 31. This can increase the flow speed of the wastewater at the first filter screen 47, thereby improving the filtration efficiency of the first filter screen 47. At the same time, the high flow rate of the wastewater drives the transmission impeller 412 to rotate, further accelerating the rotation of the guide impeller 46, making the wastewater spray more even.

[0053] 3) When the first filter screen 47 is blocked, the electromagnetic adsorption device 24 is activated to adsorb the magnetic ring 410. The electric push rod 26 lifts the electromagnetic adsorption device 24, which in turn moves the baffle 45 and the first filter screen 47. At this time, the guide impeller 46 and the transmission impeller 412 are still rotating. The electric push rod 26 moves back and forth over a short distance to clear the dirt blocking the first filter screen 47.

[0054] 4) After secondary filtration, the wastewater is transported to the second outer shell 31 through the one-way valve 27, and then filtered through the second filter screen 52 in the filtration treatment mechanism 5. After passing through the flow-expanding shell 32, the wastewater is de-flowed and the turbulence is reduced. The first perforated flower wall 34 further reduces the turbulence of the slow-flowing wastewater. Then, it is filtered again through the filtration treatment mechanism 5. The second perforated flower wall 35 further reduces the turbulence of the filtered wastewater. Finally, it is discharged to the outside through the main drain pipe 36.

[0055] 5) When the second filter screen 52 needs to be cleaned, the connecting rod 58 and brush 59 can be moved by the second drive motor 510 to clean the dirt retained on the second filter screen 52.

[0056] 6) When the sludge accumulated below the second outer shell 31 and the third outer shell 33 reaches a certain level, it is cleaned outward through the first sludge pipe 37 and the second sludge pipe 39 (sludge pump).

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-turbulence multi-stage pretreatment filtering device for high-turbidity sewage, comprising a first filtering treatment device (1), characterized in that, The first filter processing device (1) is provided below with a second filter processing device (2), the second filter processing device (2) is provided with a booster filter device (4), the second filter processing device (2) is provided below with a turbulence reduction filter device (3), the turbulence reduction filter device (3) is provided with a filter processing mechanism (5); The second filter processing device (2) includes a collection tank (21), the collection tank (21) is provided below with a booster filter device (4), the booster filter device (4) is fixedly provided with a second sundry collection tank (22) on the top, the second sundry collection tank (22) is provided with a second water outlet pipe (23) on the left side, the booster filter device (4) is fixedly provided with a second fixed block (25) on the top, the second fixed block (25) is fixedly provided with an electric push rod (26) above, the electric push rod (26) output shaft is slidably provided with an electromagnetic adsorption device (24) matched with two booster filter devices (4), the booster filter device (4) is provided with a one-way valve (27) on the bottom, the turbulence reduction filter device (3) is provided with a water pump (29) above, the turbulence reduction filter device (3) is communicated with the water pump (29) inlet through a first water inlet pipe (28), the water pump (29) outlet is communicated with two booster filter devices (4) through a connecting bifurcated pipe (210), the connecting bifurcated pipe (210) is provided with a first electromagnetic valve (211); The booster filter device (4) includes an upper cylinder (41), the upper cylinder (41) is provided below with a tempered organic glass pipe (43), the tempered organic glass pipe (43) is provided below with a lower cylinder (44), the upper cylinder (41) is fixedly provided with an upper limit fixed block (48) on the bottom, the lower cylinder (44) is fixedly provided with a lower limit fixed block (411) on the top, the upper limit fixed block (48) and the lower limit fixed block (411) are slidably provided with a through shaft (413) and the through shaft (413) axis is same with the upper cylinder (41), the tempered organic glass pipe (43) and the lower cylinder (44) axis, two supports (49) are rotatably installed on the through shaft (413) between the upper limit fixed block (48) and the lower limit fixed block (411) through sealing bearings, the outer side of the two supports (49) is fixedly provided with a magnetic ring (410) matched with the electromagnetic adsorption device (24) and the magnetic ring (410) outer diameter is same with the tempered organic glass pipe (43) inner diameter, a first filter screen (47) is rotatably installed on the through shaft (413) above the upper limit fixed block (48) through a sealing bearing, a plurality of second sundry discharge holes (42) are formed in the inner wall of the upper cylinder (41), a movable baffle (45) is fixedly arranged on the outer edge of the first filter screen (47) and matched with the second sundry discharge hole (42), a guide vane (46) is fixedly arranged on the through shaft (413) upper end above the first filter screen (47), a transmission vane (412) is fixedly arranged on the through shaft (413) lower end below the lower limit fixed block (411).

2. The low turbulence multi-stage pretreatment filter apparatus for high turbidity sewage of claim 1, wherein, The first filtering treatment device (1) comprises a first outer shell (11), a first cover plate (12) is arranged above the first outer shell (11), a sewage inlet pipe (13) is arranged above the first cover plate (12), a first fixed block (14) is fixedly arranged on the right side of the first outer shell (11), a first driving motor (15) is arranged above the first fixed block (14), and the first outer shell (11) is oppositely provided with two foreign matter removing rollers (17), and the two foreign matter removing rollers (17) are arranged in a staggered manner; the output shaft of the first driving motor (15) is connected with the foreign matter removing rollers (17) through a gear transmission mechanism (16); a first foreign matter discharge hole (18) is formed in the bottom of the two sides of the first outer shell (11); a first foreign matter collecting box (19) is arranged below the two sides of the first outer shell (11); and a first water outlet pipe (110) is arranged on the end face of the first foreign matter collecting box (19).

3. The low turbulence multi-stage pretreatment filter apparatus for high turbidity sewage of claim 2, wherein, The turbulence reduction filtering device (3) comprises a second outer shell (31), a flow expansion shell (32) is arranged on the right side of the second outer shell (31), a third outer shell (33) is arranged on the right side of the flow expansion shell (32), first and second perforated flower walls (34) and (35) are respectively arranged at the two ends in the inner side of the third outer shell (33), a filtering treatment mechanism (5) is arranged in the third outer shell (33) between the first and second perforated flower walls (34) and (35), the filtering treatment mechanism (5) is arranged at the right end of the second outer shell (31), and a total drainage pipe (36) is arranged on the right side of the third outer shell (33).

4. The low turbulence multi-stage pretreatment filter apparatus for high turbidity sewage of claim 3, wherein, A first sludge pipe (37) is arranged below the second outer shell (31), a second electromagnetic valve (38) is arranged on the first sludge pipe (37), a second sludge pipe (39) is arranged below the third outer shell (33), and a third electromagnetic valve (310) is arranged on the second sludge pipe (39).

5. The low turbulence multi-stage pretreatment filter apparatus for high turbidity sewage of claim 4, wherein, A plurality of rolling balls are embedded on the end faces between the upper limiting fixed block (48) and the lower limiting fixed block (411).

6. The low turbulence multi-stage pretreatment filter apparatus for high turbidity sewage of claim 5, wherein, The filtering treatment mechanism (5) comprises a lower fixed plate (51) and an upper fixed plate (53), a second filter screen (52) is arranged between the lower fixed plate (51) and the upper fixed plate (53), a threaded rod (54) is rotatably arranged on one side of the upper fixed plate (53), a moving seat (55) is threadedly mounted on the threaded rod (54), a sliding rod (56) is arranged on one side of the lower fixed plate (51), a sliding sleeve (57) is arranged on the sliding rod (56), the moving seat (55) and the sliding sleeve (57) are fixedly connected through a connecting rod (58), a brush (59) matched with the second filter screen (52) is fixedly arranged on the connecting rod (58), a third fixed block (511) is fixedly arranged on the outer side of the turbulence reduction filtering device (3) in opposition, a second driving motor (510) is fixedly arranged between adjacent third fixed blocks (511), and the threaded rod (54) is connected with the output shaft of the second driving motor (510) through a shaft coupling.

7. A method for the pre-treatment of high turbidity wastewater with a low turbulence multi-stage filter, comprising the pre-treatment of high turbidity wastewater with a low turbulence multi-stage filter according to claim 6, characterized in that, The operation steps comprise: 1) The sewage is preliminarily filtered, the high-turbidity sewage is conveyed into the first filtering device (1) through the sewage inlet pipe (13), the two debris removing rollers (17) are rotated to remove the large debris in the high-turbidity sewage, the large debris is collected into the first debris collecting box (19) from the first debris discharge hole (18), and the sewage after the first filtration is introduced into the second filtering device (2); 2) The sewage after the first filtration is collected at the collecting box (21) and then is dividedly conveyed into the pressure filtration device (4), the sewage after the first filtration drives the guide vane (46) to rotate, the sewage is uniformly sprayed on the first filter screen (47), and then the sewage is secondarily filtered, the water pump (29) pumps the sewage in the second outer shell (31) into the pressure filtration device (4), and drives the sewage in the collecting box (21) to be fed into the second outer shell (31); 3) When the first filter screen (47) is blocked, the electromagnetic adsorption device (24) is started to adsorb the magnetic ring (410), the electric push rod (26) lifts the electromagnetic adsorption device (24), the baffle (45) and the first filter screen (47) are moved upwards, at this time, the guide vane (46) and the transmission vane (412) still rotate, the electric push rod (26) is reciprocated for a short distance to clean the dirt blocking the first filter screen (47); 4) The sewage after the secondary filtration is conveyed into the second outer shell (31) through the one-way valve (27), then is filtered through the second filter screen (52) in the filtering mechanism (5), is subjected to the speed reduction and turbulence reduction treatment at the flow expansion shell (32), the first perforated flower wall (34) is subjected to the turbulence reduction treatment again, then is filtered again through the filtering mechanism (5), the second perforated flower wall (35) is subjected to the turbulence reduction treatment again, and then is discharged through the total drain pipe (36).

8. The method for high turbidity sewage pre-treatment by multi-stage low turbulence filtration according to claim 7, characterized in that, When the second filter screen (52) needs to be blocked, the second driving motor (510) drives the connecting rod (58) and the brush (59) to move to clean the dirt remaining on the second filter screen (52).

9. The method for high turbidity sewage pre-treatment by multi-stage low turbulence filtration according to claim 7, characterized in that, When the sludge is accumulated below the second outer shell (31) and the third outer shell (33), the first sludge pipe (37) and the second sludge pipe (39) are used to clean the sludge outside.

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