A pre-filtering device for sewage reverse osmosis purification

Abstract

The utility model belongs to sewage treatment technical field discloses a kind of front filter treatment devices for sewage reverse osmosis purification, the problem proposed in view of background technology, the following scheme is presented, including sediment tank, the bottom inner wall of the sediment tank is connected with rectangular blow-off pipe, and the inner wall of one side of sediment tank is connected with sewage delivery pipe, the sewage delivery pipe is located at the end of sediment tank and is fixed with arc buffer plate by screw, and the inside of one side of the top of sediment tank is connected with overflow pipe, the overflow pipe is connected with lifting pump, and the water outlet end of lifting pump is connected with water inlet pipe.The utility model first utilizes arc buffer plate to carry out blocking speed limiting treatment to the sewage needing to be treated, utilizes the sinking effect of gravity, and cooperates with the rectangular baffle of constantly staggered, can effectively block and sink treatment sludge or particulate impurities in sewage, and supernatant overflowed at top can preliminarily purify sewage, reduce subsequent processing problem.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a pre-filtration treatment device for wastewater reverse osmosis purification. Background Technology

[0002] Reverse osmosis (RO) wastewater purification is a highly efficient water treatment technology. Through the selective permeation of a semi-permeable membrane, under pressure, it separates the solvent (water) from the solute (impurities) in wastewater, thereby purifying the wastewater. This technology is widely used in seawater desalination, wastewater treatment, and drinking water purification, effectively removing dissolved solids, organic matter, bacteria, viruses, and other harmful substances from water. However, when wastewater contains a large amount of sludge or other solid particles, it needs to undergo preliminary filtration to ensure the subsequent reverse osmosis purification operation can proceed normally. Therefore, filtration is necessary before reverse osmosis purification. However, existing filtration methods still have some operational problems:

[0003] 1. In the existing wastewater filtration process, it is impossible to effectively separate sludge or other solid particles mixed in the wastewater. As a result, when the wastewater after the initial filtration is subjected to subsequent reverse osmosis purification, it is very easy to cause the reverse osmosis membrane to become clogged, thus preventing the subsequent reverse osmosis from proceeding normally.

[0004] 2. Existing wastewater filtration treatment methods are relatively simple, mostly only capable of simple solid particulate matter interception, and the overall treatment effect is not ideal, which greatly increases the workload of subsequent reverse osmosis. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pre-filtration treatment device for wastewater reverse osmosis purification.

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

[0007] A pre-filtration treatment device for reverse osmosis purification of sewage includes a sedimentation tank. The bottom inner wall of the sedimentation tank is connected to a rectangular sewage pipe, and the inner wall of one side of the sedimentation tank is connected to a sewage conveying pipe. The sewage conveying pipe is located at the end of the sedimentation tank and is fixed with an arc-shaped buffer plate by screws. An overflow pipe is connected to the inside of the top side of the sedimentation tank. The overflow pipe is connected to a lift pump, and the outlet end of the lift pump is connected to an inlet pipe.

[0008] The inlet pipe is connected to the inside of the filter housing away from the booster pump, and a filter box is provided on the outside of the filter housing. A rotating shaft is rotatably installed at the axis of the filter housing. The inner walls of the filter housing are provided with equally spaced arc-shaped through grooves, and an annular filter screen is adhered to the inner wall of the filter housing. A stirring blade is fixed to the bottom outer wall of the rotating shaft with screws, and a waterproof servo motor is connected to the top axis of the rotating shaft. A solenoid valve is fixed to the bottom of the filter housing with bolts, and a slag discharge pipe is connected to the bottom of the solenoid valve. A rectangular inspection port is opened on the top outer wall of the filter box, and an inspection door is hinged to the inner wall of the rectangular inspection port.

[0009] The bottom inner wall of the filter box is connected to a connecting pipe, and the other end of the connecting pipe is connected to a phosphorus removal tank. The top of the phosphorus removal tank is fixed with a sealing cover by a snap lock, and a drive motor is connected to the center of the sealing cover. The output shaft of the drive motor is connected to a stirring rod through a coupling, and a feed hopper is connected to one end of the top of the sealing cover. The bottom inner wall of the phosphorus removal tank is connected to a rectangular drain pipe, and a rectangular through groove is opened on one side of the inner wall of the rectangular drain pipe. A hollow cylindrical shell is provided in the middle of the rectangular through groove, and a servo motor is connected to the center of the hollow cylindrical shell. Arc-shaped magnet strips are bonded to the four sides of the inner wall of the hollow cylindrical shell at equal intervals, and a PLC controller is installed on one side of the outer wall of the filter box.

[0010] Preferably, the inner wall of the sedimentation tank is fixed with a first rectangular baffle and a second rectangular baffle that are evenly distributed along the inclined direction, and the first rectangular baffle and the second rectangular baffle are staggered with each other, and the size of the first rectangular baffle and the second rectangular baffle is adapted to the size of the inner wall of the sedimentation tank.

[0011] Preferably, the outer wall of the rotating shaft is fixed with two sets of equidistantly distributed spiral rubber scrapers and cleaning brushes, and the outer walls of the spiral rubber scrapers and cleaning brushes are in close contact with the inner wall of the annular filter screen.

[0012] Preferably, a fixing ring is welded to the inner wall of the bottom of the filter box at the axial position of the filter housing, and the inner wall of the fixing ring is provided with equally spaced arc-shaped grooves.

[0013] Preferably, a glass pH sensor is connected to the inner wall of one side of the bottom of the dephosphorization tank, and the glass pH sensor is connected to a PLC controller via a signal line.

[0014] Preferably, the rectangular drain pipe has a water receiving groove welded to the inner wall of one side of the bottom of the rectangular channel, and a fixing plate is installed on the inner wall of the top of the rectangular channel along the inclined direction.

[0015] Preferably, one side of the fixing plate is screwed with symmetrically distributed adjusting screws, and the outer wall of the middle part of the adjusting screws is screwed with an arc-shaped scraper block, the bottom outer wall of the arc-shaped scraper block being in close contact with the outer wall of the hollow column shell.

[0016] Preferably, an arc-shaped card block is slidably inserted into the inner wall of the arc-shaped card slot, and a columnar filter screen box is welded to the top of the four arc-shaped card blocks. The columnar filter screen box has a mesh structure, and the inner wall of the columnar filter screen box is filled with activated carbon particles.

[0017] Preferably, the pH value of the wastewater inside the phosphorus removal tank is adjusted to 5-7, and an appropriate amount of magnetic microsphere-loaded metal oxide is added inside the feed hopper.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The wastewater filtration and treatment device designed in this paper first uses an arc-shaped buffer plate to block and limit the speed of the wastewater to be treated. Then, by using the sinking effect of gravity and with the help of continuously staggered rectangular baffles, the sludge or particulate impurities in the wastewater can be effectively blocked and settled. The supernatant overflowing from the top can preliminarily purify the wastewater and reduce subsequent treatment problems.

[0020] 2. The wastewater filtration device designed in this way, after the wastewater has undergone preliminary treatment, is introduced into the filter housing. Centrifugal force is used to accelerate the settling of impurities and particles, and a solenoid valve is used for timed slag discharge, which can further filter the wastewater. The continuously rotating spiral rubber scraper and cleaning brush inside can clean the annular filter screen in real time to prevent the mesh from becoming clogged and affecting the filtration efficiency. The external cylindrical filter screen box can adsorb, purify and remove odors from the wastewater, thus enabling further purification.

[0021] 3. The wastewater filtration treatment device designed in this paper removes excess phosphorus from the wastewater after it has undergone dual filtration treatment and is adjusted to a weakly acidic state. This is achieved by adding an appropriate amount of magnetic microsphere-loaded metal oxides such as La-Fe3O4, thereby preventing eutrophication of the discharged wastewater and improving the wastewater treatment effect. Attached Figure Description

[0022] Figure 1 This is a front view of the overall structure of a pre-filtration treatment device for wastewater reverse osmosis purification proposed in this utility model;

[0023] Figure 2 This is a first-view structural diagram of a pre-filtration treatment device for wastewater reverse osmosis purification proposed in this utility model.

[0024] Figure 3 This is a top view of the internal structure of a pre-filtration treatment device for wastewater reverse osmosis purification proposed in this utility model.

[0025] Figure 4 This is a partial structural breakdown diagram of a pre-filtration treatment device for wastewater reverse osmosis purification proposed in this utility model.

[0026] Figure 5 This is a top view of the internal structure of the filter housing of a pre-filtration treatment device for wastewater reverse osmosis purification proposed in this utility model.

[0027] Figure 6 This is a schematic diagram of the internal structure of the phosphorus removal tank of a pre-filtration treatment device for wastewater reverse osmosis purification proposed in this utility model.

[0028] Figure 7 This is a side view of the internal structure of the phosphorus removal tank of a pre-filtration treatment device for wastewater reverse osmosis purification proposed in this utility model.

[0029] In the diagram: 1. Sedimentation tank; 2. Rectangular drain pipe; 3. Sewage conveying pipe; 4. Arc-shaped buffer plate; 5. First rectangular baffle; 6. Second rectangular baffle; 7. Overflow pipe; 8. Booster pump; 9. Inlet pipe; 10. Filter housing; 11. Filter box; 12. Arc-shaped through groove; 13. Annular filter screen; 14. Rotating shaft; 15. Agitator blade; 16. Spiral rubber scraper; 17. Cleaning brush; 18. Waterproof servo motor; 19. Solenoid valve; 20. Slag discharge pipe; 21. Fixed bottom ring; 2. Arc-shaped slot; 23. Arc-shaped block; 24. Columnar filter screen box; 25. Inspection door; 26. Connecting pipe; 27. Phosphorus removal tank; 28. Sealing cover; 29. ​​Drive motor; 30. Stirring rod; 31. Feed hopper; 32. Glass pH sensor; 33. Rectangular drain pipe; 34. Rectangular through groove; 35. Hollow column shell; 36. Servo motor; 37. Arc-shaped magnet strip; 38. Water receiving trough; 39. Fixing plate; 40. Adjusting screw; 41. Arc-shaped scraper; 42. PLC controller. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Example 1, referring to Figure 1-7 A pre-filtration treatment device for reverse osmosis purification of sewage includes a sedimentation tank 1. The bottom inner wall of the sedimentation tank 1 is connected to a rectangular drain pipe 2, and the inner wall of one side of the sedimentation tank 1 is connected to a sewage conveying pipe 3. The sewage conveying pipe 3 is located at the end of the sedimentation tank 1 and is fixed with an arc-shaped buffer plate 4 by screws. The top side of the sedimentation tank 1 is connected to an overflow pipe 7. The inner wall of the sedimentation tank 1 is fixed with a first rectangular baffle 5 and a second rectangular baffle 6 that are evenly distributed along the inclined direction.

[0032] The first rectangular baffle 5 and the second rectangular baffle 6 are staggered. The size of the first rectangular baffle 5 and the second rectangular baffle 6 is adapted to the inner wall size of the sedimentation tank 1. The overflow pipe 7 is connected to the lift pump 8, and the outlet end of the lift pump 8 is connected to the inlet pipe 9.

[0033] Two sets of equidistant spiral rubber scrapers 16 and cleaning brush plates 17 are fixed on the outer wall of the rotating shaft 14, and the outer walls of the spiral rubber scrapers 16 and cleaning brush plates 17 are in close contact with the inner wall of the annular filter screen 13.

[0034] First, the arc-shaped buffer plate 4 is used to block and limit the speed of the sewage to be treated. Then, by using the sinking effect of gravity and with the continuous staggered rectangular baffles, the sludge or particulate impurities in the sewage can be effectively blocked and settled. The supernatant overflowing from the top can preliminarily purify the sewage and reduce subsequent treatment problems.

[0035] The water inlet pipe 9 is connected to the inside of the filter housing 10 away from the booster pump 8, and the filter housing 10 is provided with a filter box 11 on the outside. A rotating shaft 14 is rotatably installed at the axis of the filter housing 10. The inner walls of the filter housing 10 are provided with equally spaced arc-shaped through grooves 12, and an annular filter screen 13 is adhered to the inner wall of the filter housing 10. A stirring blade 15 is fixed to the bottom outer wall of the rotating shaft 14 by screws, and a waterproof servo motor 18 is connected to the top axis of the rotating shaft 14. A solenoid valve 19 is fixed to the bottom of the filter housing 10 by bolts.

[0036] The bottom of the solenoid valve 19 is connected to a slag discharge pipe 20. A fixed bottom ring 21 is welded to the inner wall of the bottom of the filter box 11 along the axis of the filter housing 10. The inner wall of the fixed bottom ring 21 has arc-shaped slots 22 distributed at equal intervals. Arc-shaped blocks 23 are slidably inserted into the inner wall of the arc-shaped slots 22. Columnar filter screen boxes 24 are welded to the top of the four arc-shaped blocks 23. The columnar filter screen boxes 24 have a mesh structure and the inner wall of the columnar filter screen boxes 24 is filled with activated carbon particles. A rectangular inspection port is opened on the outer wall of the top of the filter box 11, and an inspection door 25 is hinged to the inner wall of the rectangular inspection port.

[0037] The filter box 11 has a connecting pipe 26 connected to the inner wall of one side of the bottom, and the other end of the connecting pipe 26 is connected to the phosphorus removal tank 27. The pH value of the sewage inside the phosphorus removal tank 27 is adjusted to 5-7, and an appropriate amount of magnetic microsphere loaded metal oxide is added inside the feed hopper 31. The top of the phosphorus removal tank 27 is fixed with a sealing cover 28 by a snap lock, and a drive motor 29 is connected to the axis of the sealing cover 28. The output shaft of the drive motor 29 is connected to a stirring rod 30 through a coupling, and one end of the top of the sealing cover 28 is connected to the feed hopper 31. The inner wall of the bottom of the phosphorus removal tank 27 is connected to a rectangular drain pipe 33, and a rectangular through groove 34 is opened on one side of the inner wall of the rectangular drain pipe 33. A water receiving trough 38 is welded to the inner wall of the bottom side of the rectangular drain pipe 33 located in the rectangular through groove 34, and a fixing plate 39 is installed on the inner wall of the top of the rectangular through groove 34 along the inclined direction.

[0038] One side of the fixed plate 39 is screwed with symmetrically distributed adjusting screws 40, and an arc-shaped scraper 41 is screwed to the outer wall of the middle part of the adjusting screw 40. The bottom outer wall of the arc-shaped scraper 41 is in close contact with the outer wall of the hollow column shell 35.

[0039] A hollow cylindrical shell 35 is provided in the middle of the rectangular through groove 34, and a servo motor 36 is connected to the axis of the hollow cylindrical shell 35. Arc-shaped magnet strips 37 are bonded to the inner walls of the hollow cylindrical shell 35 at equal intervals. A PLC controller 42 is installed on one outer wall of the filter box 11. A glass pH sensor 32 is connected to the inner wall of the bottom of the phosphorus removal tank 27, and the glass pH sensor 32 is connected to the PLC controller 42 through a signal line.

[0040] When using this wastewater reverse osmosis purification pre-filtration treatment device, the device is first assembled. After assembly, an external power supply is connected for trial operation. Once normal operation is achieved, the wastewater to be treated is connected to the wastewater delivery pipe 3 and fed into the sedimentation tank 1. The arc-shaped buffer plate 4 inside the tank blocks the wastewater, reducing its flow rate. Then, the sludge and other solid impurities in the wastewater are further reduced in flow rate by multiple intersecting first rectangular baffles 5 and second rectangular baffles 6 at the top. Combined with gravity, the sludge and solid impurity particles settle and are discharged from the bottom rectangular drain pipe 2. After sedimentation, the supernatant of the wastewater is discharged from the top overflow pipe 7 and pumped into the filter housing 10 by the lift pump 8. At this time, the waterproof servo motor 18 drives the rotating shaft 14 to rotate, thereby using the stirring blades 15 to stir the wastewater. Centrifugal force is used to further aggregate and settle the impurities in the wastewater. To prevent the holes of the annular filter screen 13 from clogging, the spiral rubber scraper 16 and cleaning brush 17 on its inner wall rotate continuously to clean it.

[0041] Example 2, refer to Figure 1-7A pre-filtration treatment device for reverse osmosis purification of sewage includes a sedimentation tank 1. The bottom inner wall of the sedimentation tank 1 is connected to a rectangular drain pipe 2, and the inner wall of one side of the sedimentation tank 1 is connected to a sewage conveying pipe 3. The sewage conveying pipe 3 is located at the end of the sedimentation tank 1 and is fixed with an arc-shaped buffer plate 4 by screws. The top side of the sedimentation tank 1 is connected to an overflow pipe 7. The inner wall of the sedimentation tank 1 is fixed with a first rectangular baffle 5 and a second rectangular baffle 6 that are evenly distributed along the inclined direction.

[0042] The first rectangular baffle 5 and the second rectangular baffle 6 are staggered. The size of the first rectangular baffle 5 and the second rectangular baffle 6 is adapted to the inner wall size of the sedimentation tank 1. The overflow pipe 7 is connected to the lift pump 8, and the outlet end of the lift pump 8 is connected to the inlet pipe 9.

[0043] Two sets of equidistant spiral rubber scrapers 16 and cleaning brush plates 17 are fixed on the outer wall of the rotating shaft 14, and the outer walls of the spiral rubber scrapers 16 and cleaning brush plates 17 are in close contact with the inner wall of the annular filter screen 13.

[0044] The water inlet pipe 9 is connected to the inside of the filter housing 10 away from the booster pump 8, and the filter housing 10 is provided with a filter box 11 on the outside. A rotating shaft 14 is rotatably installed at the axis of the filter housing 10. The inner walls of the filter housing 10 are provided with equally spaced arc-shaped through grooves 12, and an annular filter screen 13 is adhered to the inner wall of the filter housing 10. A stirring blade 15 is fixed to the bottom outer wall of the rotating shaft 14 by screws, and a waterproof servo motor 18 is connected to the top axis of the rotating shaft 14. A solenoid valve 19 is fixed to the bottom of the filter housing 10 by bolts.

[0045] After the wastewater undergoes preliminary treatment, it is introduced into the filter housing 10. Centrifugal force is used to accelerate the settling of impurities and particles. In conjunction with the solenoid valve 19, slag is discharged at regular intervals, which can further filter the wastewater. The continuously rotating spiral rubber scraper 16 and cleaning brush 17 inside can clean the annular filter screen 13 in real time to prevent the mesh from becoming clogged and affecting the filtration efficiency. The externally installed columnar filter box 24 can adsorb, purify and remove odors from the wastewater, thus enabling further purification.

[0046] The bottom of the solenoid valve 19 is connected to a slag discharge pipe 20. A fixed bottom ring 21 is welded to the inner wall of the bottom of the filter box 11 along the axis of the filter housing 10. The inner wall of the fixed bottom ring 21 has arc-shaped slots 22 distributed at equal intervals. Arc-shaped blocks 23 are slidably inserted into the inner wall of the arc-shaped slots 22. Columnar filter screen boxes 24 are welded to the top of the four arc-shaped blocks 23. The columnar filter screen boxes 24 have a mesh structure and the inner wall of the columnar filter screen boxes 24 is filled with activated carbon particles. A rectangular inspection port is opened on the outer wall of the top of the filter box 11, and an inspection door 25 is hinged to the inner wall of the rectangular inspection port.

[0047] The filter box 11 has a connecting pipe 26 connected to the inner wall of one side of the bottom, and the other end of the connecting pipe 26 is connected to the phosphorus removal tank 27. The pH value of the sewage inside the phosphorus removal tank 27 is adjusted to 5-7, and an appropriate amount of magnetic microsphere loaded metal oxide is added inside the feed hopper 31. The top of the phosphorus removal tank 27 is fixed with a sealing cover 28 by a snap lock, and a drive motor 29 is connected to the axis of the sealing cover 28. The output shaft of the drive motor 29 is connected to a stirring rod 30 through a coupling, and one end of the top of the sealing cover 28 is connected to the feed hopper 31. The inner wall of the bottom of the phosphorus removal tank 27 is connected to a rectangular drain pipe 33, and a rectangular through groove 34 is opened on one side of the inner wall of the rectangular drain pipe 33. A water receiving trough 38 is welded to the inner wall of the bottom side of the rectangular drain pipe 33 located in the rectangular through groove 34, and a fixing plate 39 is installed on the inner wall of the top of the rectangular through groove 34 along the inclined direction.

[0048] After the wastewater undergoes dual filtration treatment, by adjusting it to a weakly acidic state and adding an appropriate amount of magnetic microsphere-loaded metal oxides such as La-Fe3O4, excess phosphorus in the wastewater can be removed, thereby preventing eutrophication of the discharged wastewater and improving the wastewater treatment effect.

[0049] One side of the fixed plate 39 is screwed with symmetrically distributed adjusting screws 40, and an arc-shaped scraper 41 is screwed to the outer wall of the middle part of the adjusting screw 40. The bottom outer wall of the arc-shaped scraper 41 is in close contact with the outer wall of the hollow column shell 35.

[0050] A hollow cylindrical shell 35 is provided in the middle of the rectangular through groove 34, and a servo motor 36 is connected to the axis of the hollow cylindrical shell 35. Arc-shaped magnet strips 37 are bonded to the inner walls of the hollow cylindrical shell 35 at equal intervals. A PLC controller 42 is installed on one outer wall of the filter box 11. A glass pH sensor 32 is connected to the inner wall of the bottom of the phosphorus removal tank 27, and the glass pH sensor 32 is connected to the PLC controller 42 through a signal line.

[0051] When using this wastewater reverse osmosis purification pre-filtration treatment device, the treatment device is first assembled. After assembly, the external power supply is connected for trial operation. After normal operation, the wastewater to be treated is connected to the wastewater delivery pipe 3 and passed into the sedimentation tank 1. The arc-shaped buffer plate 4 inside the tank will block the wastewater and reduce the flow rate. Then, the sludge and other solid impurities in the wastewater are further reduced in flow rate under the restriction of multiple intersecting first rectangular baffles 5 and second rectangular baffles 6 at the top. With the help of gravity, the sludge and solid impurity particles will sink and be discharged from the bottom rectangular drain pipe 2. After sedimentation, the supernatant of the wastewater is discharged from the top overflow pipe 7 and is pumped into the filter housing 10 by the lift pump 8. At this time, the waterproof servo motor 18 drives the rotating shaft 14 to rotate, thereby using the stirring blades 15 to stir the wastewater. Centrifugal force is used to further aggregate and sink the impurities in the wastewater. In order to prevent the holes of the annular filter screen 13 from being blocked, the spiral rubber scraper 16 and cleaning brush 17 set on its inner wall rotate continuously to clean it.

[0052] The precipitated impurities are discharged by the timed opening of the solenoid valve 19. The filtered wastewater then passes through the cylindrical filter box 24, where the activated carbon particles inside filter, purify, and remove odors, thus achieving further filtration. When the filtered wastewater contains a large amount of phosphorus, it is passed into the phosphorus removal tank 27. At this time, the pH is first adjusted to between 5 and 7 using external acidic materials, and then an appropriate amount of magnetic microsphere-loaded metal oxides such as La-Fe3O4 are added for stirring. The phosphorus in the wastewater reacts with the magnetic microsphere-loaded metal oxides to form metal phosphate colloidal particles, which precipitate and are discharged from the bottom rectangular drain pipe 33. During the discharge process, the metal phosphate colloidal particles are adsorbed by the arc-shaped magnetic strip 37 and adhere to the outer wall of the hollow column shell 35. The hollow column shell 35 rotates continuously. When the hollow column shell 35 rotates to the top, its arc-shaped scraper 41, due to its close contact with the outer wall of the hollow column shell 35, removes the adsorbed metal phosphate colloidal particles, thereby eliminating a large amount of phosphorus in the wastewater and performing multiple filtration treatments.

[0053] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pre-filter treatment device for sewage reverse osmosis purification, comprising a sediment tank (1), characterized in that, The bottom inner wall of the sedimentation tank (1) is connected to a rectangular sewage pipe (2), and the inner wall of one side of the sedimentation tank (1) is connected to a sewage conveying pipe (3). The sewage conveying pipe (3) is located at the end of the sedimentation tank (1) and is fixed with an arc-shaped buffer plate (4) by screws. The top side of the sedimentation tank (1) is connected to an overflow pipe (7). The overflow pipe (7) is connected to a lift pump (8), and the outlet end of the lift pump (8) is connected to an inlet pipe (9). The water inlet pipe (9) is connected to the inside of the filter housing (10) away from the booster pump (8), and the filter housing (10) is provided with a filter box (11) on the outside. A rotating shaft (14) is rotatably installed at the axis of the filter housing (10). The inner walls of the filter housing (10) are provided with equally spaced arc-shaped through grooves (12), and an annular filter screen (13) is bonded to the inner wall of the filter housing (10). The bottom outer wall of the rotating shaft (14) is fixed with a stirring blade (15) by screws, and a waterproof servo motor (18) is connected to the top axis of the rotating shaft (14). The bottom of the filter housing (10) is fixed with a solenoid valve (19) by bolts, and a slag discharge pipe (20) is connected to the bottom of the solenoid valve (19). The top outer wall of the filter box (11) is provided with a rectangular inspection port, and an inspection door (25) is hinged to the inner wall of the rectangular inspection port. The filter box (11) has a connecting pipe (26) connected to the inner wall of one side of its bottom, and the other end of the connecting pipe (26) is connected to a phosphorus removal tank (27). The top of the phosphorus removal tank (27) is fixed with a sealing cover (28) by a snap lock, and a drive motor (29) is connected to the axis of the sealing cover (28). The output shaft of the drive motor (29) is connected to a stirring rod (30) through a coupling, and a feed hopper (31) is connected to one end of the top of the sealing cover (28). A rectangular drain pipe (33) is connected to the inner wall of the bottom of the phosphorus tank (27), and a rectangular through groove (34) is opened on one side of the inner wall of the rectangular drain pipe (33). A hollow cylindrical shell (35) is provided in the middle of the rectangular through groove (34), and a servo motor (36) is connected to the axis of the hollow cylindrical shell (35). Arc-shaped magnet strips (37) are bonded to the inner walls of the hollow cylindrical shell (35) at equal intervals, and a PLC controller (42) is installed on one side of the outer wall of the filter box (11).

2. The prefilter treatment device for reverse osmosis purification of sewage water according to claim 1, characterized in that, The inner wall of the sedimentation tank (1) is fixed with a first rectangular baffle (5) and a second rectangular baffle (6) that are evenly distributed along the inclined direction, and the first rectangular baffle (5) and the second rectangular baffle (6) are staggered with each other. The size of the first rectangular baffle (5) and the second rectangular baffle (6) is adapted to the size of the inner wall of the sedimentation tank (1).

3. The prefiltering device for reverse osmosis water purification according to claim 1, characterized in that, The outer wall of the rotating shaft (14) is fixed with two sets of equidistant spiral rubber scrapers (16) and cleaning brushes (17), and the outer walls of the spiral rubber scrapers (16) and cleaning brushes (17) are in close contact with the inner wall of the annular filter screen (13).

4. The prefilter treatment device for reverse osmosis purification of sewage water according to claim 1, characterized in that, A fixing bottom ring (21) is welded to the inner wall of the bottom of the filter box (11) at the axial position of the filter housing (10), and the inner wall of the fixing bottom ring (21) has arc-shaped grooves (22) distributed at equal intervals.

5. The prefilter treatment device for reverse osmosis purification of sewage water according to claim 1, characterized in that, The bottom side inner wall of the dephosphorization tank (27) is connected to a glass pH sensor (32), and the glass pH sensor (32) is connected to a PLC controller (42) via a signal line.

6. The prefilter treatment device for reverse osmosis purification of sewage water according to claim 1, characterized in that, The rectangular drain pipe (33) is located on the inner wall of the bottom side of the rectangular through groove (34) with a water receiving groove (38) welded on it, and a fixing plate (39) is installed on the inner wall of the top of the rectangular through groove (34) along the inclined direction.

7. The prefilter treatment device for reverse osmosis purification of sewage water according to claim 6, characterized in that, One side of the fixed plate (39) is screwed with symmetrically distributed adjusting screws (40), and an arc-shaped scraper (41) is screwed to the outer wall of the middle part of the adjusting screw (40). The bottom outer wall of the arc-shaped scraper (41) is closely attached to the outer wall of the hollow column shell (35).

8. The prefilter treatment device for reverse osmosis purification of sewage water according to claim 4, characterized in that, The inner wall of the arc-shaped slot (22) is slidably connected to an arc-shaped block (23), and the top of the four arc-shaped blocks (23) is welded with a columnar filter box (24). The columnar filter box (24) has a mesh structure, and the inner wall of the columnar filter box (24) is filled with activated carbon particles.

9. The prefilter treatment device for reverse osmosis purification of sewage water according to claim 1, characterized in that, The pH value of the wastewater inside the phosphorus removal tank (27) is adjusted to 5-7, and an appropriate amount of magnetic microsphere-loaded metal oxide is added inside the feed hopper (31).

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