Sewage treatment device and sewage treatment process

Abstract

This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device and process, including a coarse filtration device and a fine filtration device. The coarse filtration device includes a coarse filter box, a sealing plate, a drive component, a cleaning component, and two mounting boxes. The coarse filter box has discharge ports on opposite sides. The sealing plate has coarse filter screens on both sides. Each coarse filter screen has a folded structure fixed to its side, and a sealing frame is provided on the side of each folded structure away from the coarse filter screen. Each mounting box has two sealed cavities inside. One of the sealed cavities has a discharge pipe on the side away from the coarse filter box. A sealing component and a removal component are provided between the two sealed cavities. The cleaning component transports impurities on the coarse filter screen to one mounting box, and the sealing component isolates the removal component. The removal component concentrates the impurities collected on the coarse filter screen and discharges them through the discharge port, thereby improving the filtration effect of the coarse filter screen.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device and a wastewater treatment process. Background Technology

[0002] Wastewater generated during production in various industries, as well as domestic sewage generated in people's daily lives, all need to be treated before being discharged into natural rivers to meet the water quality requirements for discharge into a water body or for reuse.

[0003] During wastewater treatment, impurities need to be removed. Currently, the common method for treating wastewater impurities is to add wastewater into treatment equipment and then add flocculants. The flocculants adsorb the impurities, thus removing them. However, during the process of adding wastewater into the treatment equipment, it needs to be filtered to intercept larger impurities. As impurities accumulate during the process of using a filter screen, they can affect the flow rate of wastewater entering the treatment equipment. Therefore, the intercepted impurities need to be cleaned regularly. During the impurity cleaning process, the wastewater supply must be stopped, which reduces the wastewater treatment efficiency. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a wastewater treatment device and a wastewater treatment process to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides a wastewater treatment device, comprising a coarse filtration device and a fine filtration device, wherein the fine filtration device is fixedly disposed at the bottom of the coarse filtration device, and the coarse filtration device includes:

[0006] A coarse filter box is fixedly installed on top of the fine filter device and connected to it. Both sides of the coarse filter box are provided with impurity discharge ports.

[0007] A sealing plate is slidably connected inside the coarse filter box. Coarse filter screens are provided on both sides of the sealing plate. A folding structure is fixedly provided on the side of each coarse filter screen. One end of each folding structure is fixedly connected to one side of the sealing plate, and the other end carries the coarse filter screen through the discharge port. A sealing frame is provided on the side of each folding structure away from the coarse filter screen, and each sealing frame is fixedly connected to the inner wall of the coarse filter box.

[0008] A driving component is disposed inside the sealing frame, and the driving component is connected to the sealing plate in a driving manner.

[0009] A cleaning component is disposed on top of the coarse filter screen, and the cleaning component is used to clean and convey impurities on the coarse filter screen toward the discharge port;

[0010] Two mounting boxes are fixedly mounted on one side of the coarse filter box, and one side of each mounting box is connected to the discharge port. The inner wall of each mounting box away from the discharge port is fixedly connected to the end of the folded structure away from the sealing plate. Each mounting box has two sealing cavities inside. One of the sealing cavities is provided with a discharge pipe on the side away from the coarse filter box. The discharge pipe is fixed to the bottom of the mounting box and connected to it. A sealing component and a cleaning component are provided between the two sealing cavities. The sealing component is connected to the driving component.

[0011] Preferably, the folding structure includes multiple connecting strips that are hinged at both ends, wherein the connecting strips at both ends are fixedly connected to the sealing plate and the inner wall of the mounting box, respectively. The flipping angle between each connecting strip is between 0 and 180 degrees. Two clamping plates are fixedly provided on the side of each connecting strip near the coarse filter screen. Each clamping plate is provided with multiple corresponding through holes. A locking pin is inserted between every two corresponding through holes in an interference fit, so that the coarse filter screen is fixed between the two clamping plates.

[0012] In this configuration, all the connecting strips on one side of the sealing plate are arranged in a straight line, while all the connecting strips on the other side are folded together by the sealing assembly, and the two connecting strips located between the sealing assembly and the mounting box are arranged in a V-shape.

[0013] Preferably, the cleaning component includes:

[0014] A first brush roller is disposed on top of the coarse filter screen, and a first slider is rotatably connected to both ends of the first brush roller.

[0015] The first reciprocating screw is rotatably connected inside the coarse filter box, and a first slider is sleeved on the first reciprocating screw and connected for transmission.

[0016] The first guide rod is fixed inside the coarse filter box, and the other first slider is sleeved on the first guide rod;

[0017] The first gear is sleeved on one end of the first reciprocating screw and fixedly connected;

[0018] A first rack is fixed inside the coarse filter box, and the first rack is disposed on top of the first gear, and the first rack meshes with the first gear;

[0019] A first motor is fixedly installed inside the sealed cavity, and the output shaft of the first motor passes through the coarse filter box and is fixedly connected to one end of the first reciprocating lead screw.

[0020] Preferably, the driving element includes:

[0021] A second motor is fixedly mounted on one side of the mounting box, and the output shaft of the second motor passes through the mounting box and is fixedly mounted with a first bevel gear;

[0022] A second bevel gear is disposed inside the sealed cavity, and the second bevel gear meshes with the first bevel gear.

[0023] Two rectangular through holes are respectively opened on the side of the sealing frame near the folding structure. Each rectangular through hole has a protrusion inside. One end of each protrusion is fixedly connected to the side of the sealing plate, and the other end is fixedly provided with a second slider. A second reciprocating screw passes through the middle of one of the second sliders and is connected to it for transmission. A second guide rod passes through the other second slider. The two ends of the second reciprocating screw and the second guide rod are respectively rotatably connected to the inner wall of the coarse filter box. One end of the second reciprocating screw passes through the coarse filter box and is fixedly connected to the second bevel gear.

[0024] Two first sealing strips are slidably connected to the inner wall of the sealing frame. Each first sealing strip has two ends that pass through the sealing cavity and are fixedly provided with a first connecting post. Each first sealing strip is sleeved on the protrusion and fixedly connected. Each first sealing strip is wound around the first connecting post. One end of each first connecting post is rotatably connected to a support post. Each support post and the first connecting post are provided with a torsion spring structure. The first connecting post is drivenly connected to the sealing assembly.

[0025] Preferably, the enclosure component includes:

[0026] A belt-type synchronous pulley assembly is disposed within the sealed cavity;

[0027] Two mounting frames are fixed to the inner top and inner bottom of the mounting box, respectively;

[0028] Two connecting plates are respectively installed on the side of the mounting frame near the coarse filter screen. Each connecting plate is fixed with an inclined sealing plate at the end near the coarse filter screen. Each sealing plate is fixed with a sealing strip for pressing the coarse filter screen. Each connecting plate is provided with a second straight toothed rack in the middle.

[0029] Two connecting rods are both disposed inside the mounting frame. One end of each connecting rod passes through the sealed cavity and is rotatably connected. A second gear is fixed in the middle of each connecting rod. The second gear meshes with the second spur rack. One end of one of the connecting rods is fixed with a worm gear. A worm gear meshing with the worm gear is fixed on the first connecting column. The other ends of the two connecting rods are respectively fixedly connected to a pulley of the belt synchronous pulley set.

[0030] Preferably, the impurity removal component includes:

[0031] An oblong frame is disposed above the discharge pipe, and the oblong frame is fixedly connected to the inner wall of the mounting box;

[0032] The waist-shaped through hole is located in the sealed cavity away from the discharge pipe;

[0033] The second brush roller is in a spiral state, with one end set inside the waist-shaped frame and the other end passing through the waist-shaped through hole;

[0034] A lifting assembly is disposed on the top of the mounting box, and the lifting assembly is connected to the second brush roller via a drive.

[0035] The second sealing strip is slidably connected to the inner wall of the sealing cavity. The second sealing strip is sleeved on the shaft of the second brush roller and rotatably connected. The two ends of the second sealing strip are fixed with second connecting posts. The two ends of the second sealing strip are wrapped around the second connecting posts. Each end of the second connecting post is rotatably connected with a support. Each support is provided with a torsion spring structure between itself and the second connecting post. The second sealing strip covers the waist-shaped through hole.

[0036] The third motor is fixed to the outside of the mounting box. The output shaft of the third motor passes through the sealed cavity and is fixed with a third gear. A fourth gear is provided above the third gear. The fourth gear is fixedly connected to one end of the second brush roller. The fourth gear drives the second brush roller to move downward and mesh with the third gear through the lifting assembly.

[0037] Preferably, the lifting assembly includes a cylinder, a third guide rod, and two connecting rings. The cylinder is fixed to the top of the mounting box, and the telescopic rod of the cylinder and the third guide rod both pass through the top of the mounting box. Each connecting ring is sleeved on one end of the second brush roller, and the outer wall of each connecting ring is fixedly connected to the telescopic rod of the cylinder and the third guide rod.

[0038] Preferably, the device further includes a two-way solenoid valve, the inlet of which is connected to the outlet of the fine filter device. The two outlets of the two-way solenoid valve are respectively connected to a water inlet pipe and a water outlet pipe. The free end of the water inlet pipe is connected to a first water pump, and the free end of the first water pump is connected to a water storage tank. The outer wall of the water storage tank is provided with multiple water inlet pipes connected to the bottom of the mounting box. Each water inlet pipe is equipped with a one-way valve. A sludge collection tank is located beside the coarse filter box. The free end of the discharge pipe extends into the interior of the sludge collection tank. A fine filter screen is detachably connected inside the sludge collection tank. The bottom of the sludge collection tank is connected to an outlet pipe, and the free end of the outlet pipe is connected to a second water pump. The free end of the second water pump is connected to a point on the coarse filter box near the fine filter device. A one-way solenoid valve is installed on the discharge pipe.

[0039] A wastewater treatment process, applied to the wastewater treatment device described above, includes the following steps:

[0040] Wastewater is introduced into the coarse filter box and undergoes preliminary filtration through the coarse filter screen, where larger impurities are blocked. The pre-filtered water then flows downwards into the fine filter device for static sedimentation treatment to obtain cleaner water.

[0041] The cleaning component transports the impurities on the coarse filter screen to an installation box. The drive component moves the sealing plate and the sealing component, allowing the coarse filter screens on both sides of the sealing plate to exchange states with the help of the folding structure. The sealing plate closes a discharge port, and the sealing component is used to isolate the impurity removal component. The impurity removal component works to concentrate the impurities gathered on the coarse filter screen and discharge them to the discharge port, thereby improving the filtration effect of the coarse filter screen.

[0042] The treated water is then transported to the anaerobic tank and the anoxic tank through the drainage pipe. The wastewater in the anaerobic tank is treated by ammoniation and denitrification before entering the anoxic tank for deep denitrification.

[0043] Wastewater from the anoxic tank flows out in two streams: one stream flows back into the anaerobic tank, and the other stream undergoes full nitrification in the aeration tank.

[0044] Wastewater in the aeration tank is fed into the secondary sedimentation tank for mud-water separation to form settled sludge. The settled sludge is returned to the sludge regeneration tank and aerated to form activated sludge.

[0045] The activated sludge in the sludge regeneration tank is returned to the anoxic tank.

[0046] The beneficial effects of this invention are as follows: Wastewater is introduced into the coarse filter box and undergoes preliminary filtration through a coarse filter screen, blocking larger impurities. The pre-filtered water flows downward into the fine filter device for settling. When cleaning of the coarse filter screen is required, the impurities on the screen are transported to an installation box by a cleaning component. A driving component moves the sealing plate and the sealing component, allowing the coarse filter screens on both sides of the sealing plate to exchange states with the aid of the folding structure. The sealing plate closes a discharge port, and the sealing component isolates the impurity removal component. The impurity removal component concentrates the impurities collected on the coarse filter screen and discharges them to the discharge port, thereby improving the filtration effect of the coarse filter screen. This solves the problem in the prior art that the wastewater supply needs to be stopped during the cleaning of the filter screen, which reduces the wastewater treatment efficiency. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0049] Figure 2 This is a top view of the internal structure of the mounting box according to an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the folding structure according to an embodiment of the present invention;

[0051] Figure 4 This is an embodiment of the present invention. Figure 3 Enlarged structural diagram at point A;

[0052] Figure 5 This is a three-dimensional structural diagram of the cleaning component according to an embodiment of the present invention;

[0053] Figure 6 This is a three-dimensional structural diagram of the impurity removal component according to an embodiment of the present invention;

[0054] Figure 7 This is a three-dimensional structural diagram of the driving component according to an embodiment of the present invention;

[0055] Figure 8 This is a schematic diagram of the structure of the enclosed component according to an embodiment of the present invention;

[0056] Figure 9 This is a three-dimensional structural diagram of the connecting plate according to an embodiment of the present invention;

[0057] Figure 10 This is a three-dimensional structural diagram of the sludge collection box according to an embodiment of the present invention.

[0058] The diagram is marked as follows:

[0059] 1. Fine filtration device; 2. Coarse filter box; 3. Sealing plate; 4. Coarse filter screen; 5. Sealing frame; 6. Drive component; 7. Cleaning assembly; 8. Mounting box; 9. Sealing cavity; 10. Discharge pipe; 11. Sealing assembly; 12. Impurity removal assembly; 13. Connecting strip; 14. Clamping plate; 15. Perforation; 16. Locking pin; 17. First brush roller; 18. First slider; 19. First reciprocating screw; 20. First guide rod; 21. First gear; 22. First rack; 23. First motor; 24. Second motor; 25. First bevel gear; 26. Second bevel gear; 27. Rectangular through hole; 28. Protrusion; 29. ​​Second slider; 30. Second reciprocating screw; 31. Second guide rod; 32. First sealing strip; 33. First connecting column; 34. Support column; 35. 36. Belt-type synchronous pulley assembly; 37. Mounting frame; 38. Connecting plate; 39. Sealing inclined plate; 40. Sealing strip; 41. Second straight rack; 42. Connecting rod; 43. Second gear; 44. Worm gear; 45. Worm; 46. Waist-shaped frame; 47. Waist-shaped through hole; 48. Second brush roller; 49. Second sealing strip; 50. Second connecting column; 51. Support; 52. Third motor; 53. Third gear; 54. Fourth gear; 55. Cylinder; 56. Third guide rod; 57. Connecting ring; 58. Two-way solenoid valve; 59. Water inlet pipe; 60. Drain pipe; 61. First water pump; 62. Water storage tank; 63. Inlet pipe; 64. Check valve; 65. Sludge collection tank; 66. Fine filter screen; 67. Outlet pipe; 68. Second water pump; 69. One-way solenoid valve. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0061] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0062] like Figures 1 to 10As shown, a wastewater treatment device includes a coarse filter and a fine filter 1. The fine filter 1 is fixed at the bottom of the coarse filter. The coarse filter includes:

[0063] The coarse filter box 2 is fixedly installed on the top of the fine filter device 1 and connected to it. Both sides of the coarse filter box 2 are provided with impurity discharge ports.

[0064] A sealing plate 3 is slidably connected inside the coarse filter box 2. Coarse filter screens 4 are provided on both sides of the sealing plate 3. A folding structure is fixedly provided on the side of each coarse filter screen 4. One end of each folding structure is fixedly connected to one side of the sealing plate 3, and the other end carries the coarse filter screen 4 through the discharge port. A sealing frame 5 is provided on the side of each folding structure away from the coarse filter screen 4, and each sealing frame 5 is fixedly connected to the inner wall of the coarse filter box 2.

[0065] The driving component 6 is disposed inside the sealing frame 5, and the driving component 6 is connected to the sealing plate 3 in a transmission manner;

[0066] The cleaning component 7 is disposed on top of the coarse filter screen 4. The cleaning component 7 is used to clean and transport impurities on the coarse filter screen 4 toward the discharge port.

[0067] Two mounting boxes 8 are fixedly installed on one side of the coarse filter box 2. One side of each mounting box 8 is connected to the discharge port. The inner wall of each mounting box 8 away from the discharge port is fixedly connected to the end of the folded structure away from the sealing plate 3. Each mounting box 8 has two sealing cavities 9 inside. One of the sealing cavities 9 is provided with a discharge pipe 10 on the side away from the coarse filter box 2. The discharge pipe 10 is fixed to the bottom of the mounting box 8 and connected to it. A sealing component 11 and a cleaning component 12 are provided between the two sealing cavities 9. The sealing component 11 is connected to the driving component 6.

[0068] As an optional embodiment, the folding structure includes multiple connecting strips 13 that are hinged at both ends, wherein the connecting strips 13 at both ends are fixedly connected to the inner walls of the sealing plate 3 and the mounting box 8 respectively, the flip angle between each connecting strip 13 is between 0 and 180 degrees, and two clamping plates 14 are fixedly provided on the side of each connecting strip 13 near the coarse filter screen 4. Each clamping plate 14 is provided with multiple corresponding through holes 15, and a locking pin 16 is inserted between every two corresponding through holes 15 in an interference fit, so that the coarse filter screen 4 is fixed between the two clamping plates 14.

[0069] Among them, all the connecting strips 13 on one side of the sealing plate 3 are arranged in a straight line, and all the connecting strips 13 on the other side are folded by the sealing component 11, and the two connecting strips 13 located between the sealing component 11 and the mounting box 8 are arranged in a V shape.

[0070] like Figures 1 to 4 As shown, impurities fall onto the coarse filter screen 4 arranged in a straight line. The cleaning component 7 transports the impurities into the installation box 8. As the driving component 6 moves the sealing plate 3 and the sealing component 11, the coarse filter screen 4, which discharges material in a straight line, begins to fold and merge with the assistance of the connecting strip 13 and the sealing component 11. The two connecting strips 13 are set in a V-shape, so that the impurities fall between the two connecting strips 13. When the sealing plate 3 completely covers the sealed discharge port, the sealing component 11 also completes the sealing of the impurity removal component 12. At this time, the impurities between the two connecting strips 13 are cleaned into the discharge pipe 10 and discharged by the impurity removal component 12, thereby completing the cleaning of impurities on the coarse filter screen 4 and improving the filtration efficiency of the coarse filter screen 4. By setting the clamping plate 14, the perforation 15 and the locking pin 16, the coarse filter screen 4 is easy to disassemble and replace. The connecting strip 13 connected to the inner wall of the installation box 8 and the sealing plate 3 is fixed by screws or welding to avoid the problem of the locking pin 16 being unable to be removed.

[0071] As an optional embodiment, the cleaning component 7 includes:

[0072] The first brush roller 17 is disposed on the top of the coarse filter screen 4, and the two ends of the first brush roller 17 are rotatably connected with the first slider 18.

[0073] The first reciprocating screw 19 is rotatably connected inside the coarse filter box 2, and a first slider 18 is sleeved on the first reciprocating screw 19 and connected for transmission.

[0074] The first guide rod 20 is fixed inside the coarse filter box 2, and the other first slider 18 is sleeved on the first guide rod 20;

[0075] The first gear 21 is sleeved on one end of the first reciprocating screw 19 and fixedly connected;

[0076] The first rack 22 is fixed inside the coarse filter box 2. The first rack 22 is disposed on the top of the first gear 21 and meshes with the first gear 21.

[0077] The first motor 23 is fixedly installed in the sealed cavity 9, and the output shaft of the first motor 23 passes through the coarse filter box 2 and is fixedly connected to one end of the first reciprocating screw 19.

[0078] like Figure 1 , Figure 2 and Figure 5As shown, the first motor 23 drives the first reciprocating screw 19 to rotate, the first reciprocating screw 19 drives the first slider 18 to move back and forth, the first slider 18 drives the first brush roller 17 to move, the first brush roller 17 drives the first gear 21 to move on the first rack 22. Through the meshing of the first gear 21 and the first rack 22, the first gear 21 drives the first brush roller 17 to rotate, and the first brush roller 17 drives the impurities on the coarse filter screen 4 to move, so that the impurities enter the mounting box 8.

[0079] As an optional embodiment, the drive unit 6 includes:

[0080] The second motor 24 is fixedly mounted on one side of the mounting box 8, and the output shaft of the second motor 24 passes through the mounting box 8 and is fixedly mounted with the first bevel gear 25;

[0081] The second bevel gear 26 is disposed inside the sealing cavity 9, and the second bevel gear 26 meshes with the first bevel gear 25;

[0082] Two rectangular through holes 27 are respectively opened on the side of the sealing frame 5 near the folding structure. Each rectangular through hole 27 has a protrusion 28 inside. One end of each protrusion 28 is fixedly connected to the side of the sealing plate 3, and the other end is fixedly provided with a second slider 29. A second reciprocating screw 30 is passed through the middle of one of the second sliders 29 and is connected to it for transmission. A second guide rod 31 is passed through the other second slider 29. The two ends of the second reciprocating screw 30 and the second guide rod 31 are respectively rotatably connected to the inner wall of the coarse filter box 2, and one end of the second reciprocating screw 30 passes through the coarse filter box 2 and is fixedly connected to the second bevel gear 26.

[0083] Two first sealing strips 32 are slidably connected to the inner wall of the sealing frame 5. Each first sealing strip 32 has two ends that pass through the sealing cavity 9 and are fixedly provided with a first connecting post 33. Each first sealing strip 32 is sleeved on the protrusion 28 and fixedly connected. Each first sealing strip 32 is wrapped around the first connecting post 33. One end of each first connecting post 33 is rotatably connected to a support post 34. Each support post 34 and the first connecting post 33 are provided with a torsion spring structure. The first connecting post 33 is drivenly connected to the sealing component 11.

[0084] like Figure 2 , Figure 6 and Figure 7As shown, the second motor 24 drives the first bevel gear 25 to rotate, the first bevel gear 25 drives the second bevel gear 26 to rotate, the second bevel gear 26 drives the second reciprocating screw 30 to rotate, the second reciprocating screw 30 drives the second slider 29 to move back and forth, the second slider 29 drives the protrusion 28 to move, the protrusion 28 drives the first sealing strip 32 and the sealing plate 3 to move, and the sealing plate 3 drives the connecting strip 13 to move, thereby completing the state switching of the two coarse filters 4. Since the first connecting post 33 at both ends of the first sealing strip 32 is provided with a torsion spring structure between the first connecting post 33 and the corresponding support post 34, the first sealing strip 32 is pulled open while being reset and rolled up by the torsion spring structure during the movement, thereby ensuring the sealing of the rectangular through hole 27 and preventing sewage from entering the sealing frame 5. At the same time, one of the first connecting posts 33 drives the sealing component 11 to work, completing the sealing of the impurity removal component 12.

[0085] As an optional embodiment, the enclosure component 11 includes:

[0086] A belt-type synchronous pulley assembly 35 is disposed within the sealed cavity 9;

[0087] Two mounting frames 36 are respectively fixed to the inner top and inner bottom of the mounting box 8;

[0088] Two connecting plates 37 are respectively installed on the side of the mounting frame 36 near the coarse filter screen 4. Each connecting plate 37 is fixed with an inclined sealing plate 38 at the end near the coarse filter screen 4. Each sealing plate 38 is fixed with a sealing strip 39 for pressing the coarse filter screen 4. Each connecting plate 37 is provided with a second straight toothed rack 40 in the middle.

[0089] Two connecting rods 41 are both disposed inside the mounting frame 36. One end of each connecting rod 41 passes through the sealing cavity 9 and is rotatably connected. A second gear 42 is fixed in the middle of each connecting rod 41. The second gear 42 meshes with the second spur rack 40. One end of one of the connecting rods 41 is fixed with a worm gear 43. A worm 44 that meshes with the worm gear 43 is fixed on the first connecting post 33. The other ends of the two connecting rods 41 are respectively fixedly connected to a pulley of the belt synchronous pulley set 35.

[0090] like Figure 8 and Figure 9As shown, the first connecting column 33 drives the worm gear 44 to rotate, the worm gear 44 drives the worm wheel 43 to rotate, the worm wheel 43 drives the connecting rod 41 to rotate, and the connecting rod 41 drives another connecting rod 41 to rotate through the belt-type synchronous pulley set 35, so that the two connecting rods 41 synchronously drive the corresponding second gear 42 to rotate, the two second gears 42 drive the corresponding second spur rack 40 to move, and the two second spur racks 40 drive the corresponding connecting plates 37 to move closer or further away from each other, so that the two connecting plates 37 press the coarse filter screen 4 tightly through the sealing inclined plate 38 and the sealing strip 39, so that both sides of the coarse filter screen 4 are sealed.

[0091] As an optional embodiment, the impurity removal component 12 includes:

[0092] A waist-shaped frame 45 is disposed above the discharge pipe 10, and the waist-shaped frame 45 is fixedly connected to the inner wall of the mounting box 8;

[0093] The waist-shaped through hole 46 is located on the sealing cavity 9, which is far away from the discharge pipe 10;

[0094] The second brush roller 47 is in a spiral state, with one end set inside the waist-shaped frame 45 and the other end passing through the waist-shaped through hole 46;

[0095] A lifting assembly is disposed on the top of the mounting box 8, and the lifting assembly is connected to the second brush roller 47 in a transmission manner;

[0096] The second sealing strip 48 is slidably connected to the inner wall of the sealing cavity 9. The second sealing strip 48 is sleeved on the shaft of the second brush roller 47 and rotatably connected. The two ends of the second sealing strip 48 are fixedly provided with second connecting posts 49. The two ends of the second sealing strip 48 are wrapped around the second connecting posts 49. Each end of the second connecting post 49 is rotatably connected with a support 50. Each support 50 is provided with a torsion spring structure between it and the second connecting post 49. The second sealing strip 48 covers the waist-shaped through hole 46.

[0097] The third motor 51 is fixedly installed on the outside of the mounting box 8. The output shaft of the third motor 51 passes through the sealing cavity 9 and is fixedly provided with a third gear 52. A fourth gear 53 is provided above the third gear 52. The fourth gear 53 is fixedly connected to one end of the second brush roller 47, and the fourth gear 53 drives the second brush roller 47 to move downward through the lifting assembly to mesh with the third gear 52.

[0098] As an optional embodiment, the lifting assembly includes a cylinder 54, a third guide rod 55, and two connecting rings 56. The cylinder 54 is fixed to the top of the mounting box 8. The telescopic rod of the cylinder 54 and the third guide rod 55 both pass through the top of the mounting box 8. Each connecting ring 56 is respectively sleeved on one end of the second brush roller 47, and the outer wall of each connecting ring 56 is fixedly connected to the telescopic rod of the cylinder 54 and the third guide rod 55, respectively.

[0099] like Figure 6 As shown, after the two sealing inclined plates 38 and the sealing strip 39 seal the coarse filter screen 4, the connecting ring 56 moves downward through the telescopic rod of the cylinder 54. The connecting ring 56 drives the second brush roller 47 to move downward, so that the brush on the second brush roller 47 contacts the V-shaped coarse filter screen 4 and its bottom. At the same time, the second brush roller 47 drives the fourth gear 53 to move downward until it meshes with the third gear 52. The third motor 51 drives the third gear 52 to rotate, the third gear 52 drives the fourth gear 53 to rotate, and the fourth gear 53 drives the second brush roller 47 to rotate. Since the second brush roller 47 is spiral, it drives the impurities in the V-shaped coarse filter screen 4 to move into the discharge port and discharge them into the mounting box 8, thereby completing the cleaning of impurities on the coarse filter screen 4.

[0100] As an optional embodiment, it also includes a two-way solenoid valve 57. The inlet end of the two-way solenoid valve 57 is connected to the outlet end of the fine filter device 1. The two outlet ends of the two-way solenoid valve 57 are respectively connected to a water inlet pipe 58 and a water outlet pipe 59. The free end of the water inlet pipe 58 is connected to a first water pump 60. The free end of the first water pump 60 is connected to a water storage tank 61. The outer wall of the water storage tank 61 is provided with a plurality of water inlet pipes 62 that are connected to the bottom of the mounting box 8. Each water inlet pipe 62 has... Each is equipped with a one-way valve 63. A sludge collection box 64 is provided on the side of the coarse filter box 2. The free end of the discharge pipe 10 extends into the interior of the sludge collection box 64. A fine filter screen 65 is detachably connected inside the sludge collection box 64. A water outlet pipe 66 is connected to the bottom of the sludge collection box 64. A second water pump 67 is connected to the free end of the water outlet pipe 66. The free end of the second water pump 67 is connected to a part of the coarse filter box 2 near the fine filter device 1. A one-way solenoid valve 68 is installed on the discharge pipe 10.

[0101] like Figure 10As shown, the water treated by the fine filtration device 1 can be directly discharged from the drain pipe 59 to the next process through the two-way solenoid valve 57, or it can be introduced into the water inlet pipe 58 through the first water pump 60, enter the water storage tank 61 through the water inlet pipe 58, enter the water inlet pipe 62 through the water storage tank 61, and then enter the space after being sealed by the sealing component 11 through the one-way valve 63. At this time, the one-way solenoid valve 68 closes the discharge pipe 10, so that water is injected into the sealed space while impurities are removed. The injection of water can effectively clean the impurities adhering to the coarse filter screen 4, further improving the cleaning efficiency of the coarse filter screen 4. By setting a sludge collection box 64 at the water outlet end of the discharge pipe 10 and setting a fine filter screen 65 in the sludge collection box 64, the discharged impurities are further filtered. The filtered water is then introduced into the fine filtration device 1 from the water outlet pipe 66 through the second water pump 67 for further treatment, further improving the filtration effect.

[0102] A wastewater treatment process, applied to the wastewater treatment device described above, includes the following steps:

[0103] Wastewater is introduced into the coarse filter box 2 and undergoes preliminary filtration through the coarse filter screen 4, where larger impurities are blocked. The pre-filtered water flows downward into the fine filter device 1 for static sedimentation treatment to obtain relatively clean water.

[0104] The cleaning component 7 transports the impurities on the coarse filter screen 4 to an installation box 8. The driving component 6 drives the sealing plate 3 and the sealing component 11 to move, so that the coarse filter screen 4 on both sides of the sealing plate 3 can exchange states with the help of the folding structure. The sealing plate 3 closes a discharge port. The sealing component 11 is used to isolate the impurity removal component 12. The impurity removal component 12 works to concentrate the impurities gathered on the coarse filter screen 4 and discharge them to the discharge port to improve the filtration effect of the coarse filter screen 4.

[0105] The treated water is transported to the anaerobic tank and the anoxic tank through the drainage pipe 59 respectively. The wastewater in the anaerobic tank is treated by ammoniation and denitrification before entering the anoxic tank for deep denitrification.

[0106] Wastewater from the anoxic tank flows out in two streams: one stream flows back into the anaerobic tank, and the other stream undergoes full nitrification in the aeration tank.

[0107] Wastewater in the aeration tank is fed into the secondary sedimentation tank for mud-water separation to form settled sludge. The settled sludge is returned to the sludge regeneration tank and aerated to form activated sludge.

[0108] The activated sludge in the sludge regeneration tank is returned to the anoxic tank.

[0109] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A wastewater treatment device, comprising a coarse filter and a fine filter (1), wherein the fine filter (1) is fixedly disposed at the bottom of the coarse filter, characterized in that, The coarse filtration device includes: The coarse filter box (2) is fixed on the top of the fine filter device (1) and connected to it. The coarse filter box (2) has discharge ports on both sides opposite to each other. A sealing plate (3) is slidably connected inside the coarse filter box (2). Coarse filter screens (4) are provided on both sides of the sealing plate (3). A folding structure is fixedly provided on the side of each coarse filter screen (4). One end of each folding structure is fixedly connected to one side of the sealing plate (3), and the other end carries the coarse filter screen (4) through the discharge port. A sealing frame (5) is provided on the side of each folding structure away from the coarse filter screen (4), and each sealing frame (5) is fixedly connected to the inner wall of the coarse filter box (2). A driving component (6) is disposed inside the sealing frame (5), and the driving component (6) is connected to the sealing plate (3) in a transmission manner; A cleaning component (7) is disposed on top of the coarse filter screen (4). The cleaning component (7) is used to clean and transport impurities on the coarse filter screen (4) toward the discharge port. Two mounting boxes (8) are respectively fixed on one side of the coarse filter box (2). One side of each mounting box (8) is connected to the discharge port. The inner wall of each mounting box (8) away from the discharge port is fixedly connected to the end of the folded structure away from the sealing plate (3). Each mounting box (8) has two sealing cavities (9). One of the sealing cavities (9) is provided with a discharge pipe (10) on the side away from the coarse filter box (2). The discharge pipe (10) is fixed to the bottom of the mounting box (8) and connected. A sealing component (11) and a cleaning component (12) are provided between the two sealing cavities (9). The sealing component (11) is connected to the driving component (6). The folding structure includes multiple connecting strips (13) that are hinged at both ends. The connecting strips (13) at both ends are fixedly connected to the inner walls of the sealing plate (3) and the mounting box (8), respectively. The flip angle between each connecting strip (13) is between 0 and 180 degrees. Two clamping plates (14) are fixed on the side of each connecting strip (13) near the coarse filter screen (4). Multiple through holes (15) are provided on each clamping plate (14). Locking pins (16) are inserted between each pair of corresponding through holes (15) in an interference fit, so that the coarse filter screen (4) is fixed between the two clamping plates (14). Among them, all the connecting strips (13) on one side of the sealing plate (3) are arranged in a straight line, and all the connecting strips (13) on the other side are folded by the closing component (11), and the two connecting strips (13) between the closing component (11) and the mounting box (8) are arranged in a V shape.

2. The wastewater treatment device according to claim 1, characterized in that, The cleaning component (7) includes: The first brush roller (17) is disposed on the top of the coarse filter screen (4), and the first slider (18) is rotatably connected to both ends of the first brush roller (17). The first reciprocating screw (19) is rotatably connected inside the coarse filter box (2), and a first slider (18) is sleeved on the first reciprocating screw (19) and connected for transmission. The first guide rod (20) is fixed inside the coarse filter box (2), and another first slider (18) is sleeved on the first guide rod (20); The first gear (21) is sleeved on one end of the first reciprocating screw (19) and fixedly connected; The first rack (22) is fixed inside the coarse filter box (2), and the first rack (22) is disposed on the top of the first gear (21), and the first rack (22) meshes with the first gear (21); The first motor (23) is fixedly installed in a sealed cavity (9), and the output shaft of the first motor (23) passes through the coarse filter box (2) and is fixedly connected to one end of the first reciprocating screw (19).

3. The wastewater treatment device according to claim 1, characterized in that, The driving component (6) includes: A second motor (24) is fixedly mounted on one side of a mounting box (8), and the output shaft of the second motor (24) is fixedly mounted with a first bevel gear (25) through the mounting box (8); A second bevel gear (26) is disposed inside the sealed cavity (9), and the second bevel gear (26) meshes with the first bevel gear (25); Two rectangular through holes (27) are respectively opened on the side of the sealing frame (5) near the folding structure. Each rectangular through hole (27) is provided with a protrusion (28). One end of each protrusion (28) is fixedly connected to the side of the sealing plate (3), and the other end is fixedly provided with a second slider (29). A second reciprocating screw (30) is passed through the middle of one of the second sliders (29) and is connected to the transmission. A second guide rod (31) is passed through the other second slider (29). The two ends of the second reciprocating screw (30) and the second guide rod (31) are respectively rotatably connected to the inner wall of the coarse filter box (2), and one end of the second reciprocating screw (30) passes through the coarse filter box (2) and is fixedly connected to the second bevel gear (26). Two first sealing strips (32) are slidably connected to the inner wall of the sealing frame (5). Each first sealing strip (32) has two ends inserted into the sealing cavity (9) and fixed with a first connecting post (33). Each first sealing strip (32) is sleeved on the protrusion (28) and fixedly connected. Each first sealing strip (32) is wrapped around the first connecting post (33). One end of each first connecting post (33) is rotatably connected to a support post (34). Each support post (34) is provided with a torsion spring structure between it and the first connecting post (33). The first connecting post (33) is connected to the sealing component (11) in a transmission manner.

4. A wastewater treatment device according to claim 3, characterized in that, The enclosure component (11) includes: A belt-type synchronous pulley assembly (35) is disposed within the sealed cavity (9); Two mounting frames (36) are respectively fixed to the inner top and inner bottom of the mounting box (8); Two connecting plates (37) are respectively installed on the side of the mounting frame (36) near the coarse filter screen (4). Each connecting plate (37) near the coarse filter screen (4) is fixed with an inclined sealing plate (38). Each sealing plate (38) is fixed with a sealing strip (39) for pressing the coarse filter screen (4). Each connecting plate (37) is provided with a second straight toothed rack (40) in the middle. Two connecting rods (41) are both located inside the mounting frame (36). One end of each connecting rod (41) passes through the sealing cavity (9) and is rotatably connected. A second gear (42) is fixed in the middle of each connecting rod (41). The second gear (42) meshes with the second spur rack (40). One end of one of the connecting rods (41) is fixed with a worm gear (43). A worm (44) meshing with the worm gear (43) is fixed on the first connecting column (33). The other ends of the two connecting rods (41) are respectively fixedly connected to a pulley of the belt synchronous pulley set (35).

5. A wastewater treatment device according to claim 1, characterized in that, The impurity removal component (12) includes: A waist-shaped frame (45) is disposed above the discharge pipe (10), and the waist-shaped frame (45) is fixedly connected to the inner wall of the mounting box (8); A waist-shaped through hole (46) is provided on the sealing cavity (9) away from the discharge pipe (10); The second brush roller (47) is in a spiral state, with one end set inside the waist-shaped frame (45) and the other end passing through the waist-shaped through hole (46); A lifting assembly is disposed on the top of the mounting box (8), and the lifting assembly is connected to the second brush roller (47) in a transmission manner; The second sealing strip (48) is slidably connected to the inner wall of the sealing cavity (9). The second sealing strip (48) is sleeved on the shaft of the second brush roller (47) and rotatably connected. The two ends of the second sealing strip (48) are fixedly provided with second connecting posts (49). The two ends of the second sealing strip (48) are wrapped around the second connecting posts (49). Each end of the second connecting post (49) is rotatably connected with a support (50). Each support (50) is provided with a torsion spring structure between it and the second connecting post (49). The second sealing strip (48) covers the waist-shaped through hole (46). The third motor (51) is fixedly installed on the outside of the mounting box (8). The output shaft of the third motor (51) passes through the sealing cavity (9) and is fixedly provided with a third gear (52). A fourth gear (53) is provided above the third gear (52). The fourth gear (53) is fixedly connected to one end of the second brush roller (47), and the fourth gear (53) drives the second brush roller (47) to move downward and mesh with the third gear (52) through the lifting assembly.

6. A wastewater treatment device according to claim 5, characterized in that, The lifting assembly includes a cylinder (54), a third guide rod (55), and two connecting rings (56). The cylinder (54) is fixed on the top of the mounting box (8). The telescopic rod of the cylinder (54) and the third guide rod (55) are both inserted through the top of the mounting box (8). Each connecting ring (56) is sleeved on one end of the second brush roller (47). The outer wall of each connecting ring (56) is fixedly connected to the telescopic rod of the cylinder (54) and the third guide rod (55).

7. A wastewater treatment device according to claim 1, characterized in that, It also includes a two-way solenoid valve (57), the inlet of which is connected to the outlet of the fine filter device (1). The two outlets of the two-way solenoid valve (57) are respectively connected to a water inlet pipe (58) and a drain pipe (59). The free end of the water inlet pipe (58) is connected to a first water pump (60). The free end of the first water pump (60) is connected to a water storage tank (61). The outer wall of the water storage tank (61) is provided with multiple water inlet pipes (62) that are connected to the bottom of the mounting box (8). Each water inlet pipe (62) is equipped with a one-way valve. (63) A sludge collection box (64) is provided on the side of the coarse filter box (2). The free end of the discharge pipe (10) extends into the interior of the sludge collection box (64). A fine filter screen (65) is detachably connected inside the sludge collection box (64). A water outlet pipe (66) is connected to the bottom of the sludge collection box (64). A second water pump (67) is connected to the free end of the water outlet pipe (66). The free end of the second water pump (67) is connected to a part of the coarse filter box (2) near the fine filter device (1). A single-way solenoid valve (68) is installed on the discharge pipe (10).

8. A wastewater treatment process, applied to the wastewater treatment apparatus as described in any one of claims 1-7, characterized in that, Includes the following steps: Wastewater is introduced into the interior of the coarse filter box (2) and pre-filtered through the coarse filter screen (4). Larger impurities are blocked on the coarse filter screen (4). The pre-filtered water flows downward into the fine filter device (1) for static sedimentation treatment to obtain cleaner water. The cleaning component (7) transports the impurities on the coarse filter screen (4) into an installation box (8). The driving component (6) drives the sealing plate (3) and the sealing component (11) to move, so that the coarse filter screen (4) on both sides of the sealing plate (3) can exchange states with the help of the folding structure. The sealing plate (3) closes a discharge port. The sealing component (11) is used to isolate the impurity removal component (12). The impurity removal component (12) works to concentrate the impurities gathered on the coarse filter screen (4) and discharge them to the discharge port to improve the filtration effect of the coarse filter screen (4). The treated water is transported to the anaerobic tank and the anoxic tank through the drain pipe (59). The wastewater in the anaerobic tank is treated by ammoniation and denitrification and then enters the anoxic tank for deep denitrification. Wastewater from the anoxic tank flows out in two streams: one stream flows back into the anaerobic tank, and the other stream undergoes full nitrification in the aeration tank. Wastewater in the aeration tank is fed into the secondary sedimentation tank for mud-water separation to form settled sludge. The settled sludge is returned to the sludge regeneration tank and aerated to form activated sludge. The activated sludge in the sludge regeneration tank is returned to the anoxic tank.

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