Anode oxidation production wastewater treatment system and treatment method

Abstract

The application is suitable for the technical field of sewage treatment, and provides an anode oxidation production wastewater treatment system and treatment method.The system comprises a sedimentation tank, a middle-end dosing part is arranged at the input end of the sedimentation tank, a front-end dosing part is arranged at the input end of the middle-end dosing part, the front-end dosing part comprises a PH adjusting cylinder, the PH adjusting cylinder is internally rotatably provided with mutually adhered spiral dosing pipes and a first spiral cold water pipe, the middle-end dosing part comprises a spiral conveying pipe, the spiral conveying pipe is obliquely upwardly and communicatively provided with a dosing branch pipe at the middle and top positions thereof, the inner and outer circumferential sides of the spiral conveying pipe are respectively fixed with a second spiral cold water pipe and a third spiral cold water pipe, and the device adds neutralizing agent solution and coagulant solution in the PH adjusting cylinder and the spiral conveying pipe in sequence, so that the wastewater is subjected to neutralization reaction and coagulation reaction in sequence, the heat generated by the neutralization reaction is avoided from affecting the coagulation reaction, and the treatment effect of the anode oxidation production wastewater is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to an anodizing production wastewater treatment system and method. Background Technology

[0002] Anodizing is the process by which an oxide film is formed on aluminum products (anodes) under appropriate electrolyte and specific process conditions due to the action of an applied current. Anodizing produces wastewater containing high concentrations of aluminum ions, fluoride ions, phosphate ions, surfactants, and various organic dyes.

[0003] A search revealed an anodizing production wastewater treatment system (publication number CN118812086B) comprising a settling tank equipped with a pressurization assembly and rollers, as well as a chemical addition hopper, grid plates, and aeration pipes. After rapid settling through multiple levels of grid plates, a movable mounting frame along the bottom wall of the settling tank, along with tiltable side plates and rollers, scrapes off the settled sludge. The sludge is then pressed and rolled by the rollers to reduce its moisture content, thereby lowering the water content of the discharged wastewater and facilitating sludge treatment.

[0004] However, in the above-mentioned wastewater treatment system for anodizing production, neutralizing agents and coagulants are added to the wastewater flowing into the settling tank through a chemical addition hopper to stabilize the pH value of the wastewater and to precipitate harmful ions in the wastewater through coagulants. Since neutralizing agents are usually alkaline substances (such as NaOH, Ca(OH)2, Na2CO3, etc.), their dissolution or dilution may be accompanied by significant thermal effects. High temperatures may accelerate the degradation of some coagulants (such as PAM), and excessively high local temperatures may cause coagulants (such as iron salts) to hydrolyze too quickly, affecting the flocculation effect. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an anodizing wastewater treatment system and method. By sequentially adding neutralizing agent solution and coagulant solution into the pH adjustment cylinder and spiral conveying pipe, the anodizing wastewater undergoes a neutralization reaction before coagulation, thus avoiding the impact of heat generated by the neutralization reaction on the coagulation reaction and improving the treatment effect of anodizing wastewater.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An anodizing wastewater treatment system includes a sedimentation tank; a mid-stage dosing section is provided at the input end of the sedimentation tank; a front-end dosing section is provided at the input end of the mid-stage dosing section; the front-end dosing section includes a pH adjusting cylinder; a spiral dosing pipe and a first spiral cooling water pipe are rotatably arranged inside the pH adjusting cylinder; drain pipes are uniformly connected to the circumferences of the spiral dosing pipe and the first spiral cooling water pipe; a one-way valve is provided on the drain pipe; the mid-stage dosing section includes a spiral conveying pipe; the tail end and the top end of the spiral conveying pipe are fixedly connected to the output end of the pH adjusting cylinder and the input end of the sedimentation tank, respectively; dosing branch pipes are inclined upwards and connected to the spiral conveying pipe at its middle and top positions; a second spiral cooling water pipe and a third spiral cooling water pipe, respectively, are fixedly attached to the inner and outer circumferences of the spiral conveying pipe.

[0007] The present invention is further configured such that: the front-end dosing section further includes a support plate; a first fixing ring is fixed to the end of the support plate; the first fixing ring is fixedly installed on the outer peripheral side of the pH adjusting cylinder by fastening bolts; and an anodizing wastewater conveying pipe is connected to the peripheral side of the pH adjusting cylinder near its input end.

[0008] The invention is further configured such that: a sealing cover is fixedly installed at the input end of the pH adjusting cylinder by fastening bolts; an annular sealing plate is rotatably provided on the inner wall of the sealing cover; an arc-shaped scraper is fixed on the side of the annular sealing plate and rotates in cooperation with the inner wall of the pH adjusting cylinder; a rotating ring is fixed on the arc-shaped scraper; and an ear plate is fixed between the rotating ring and the spiral dosing pipe and the first spiral cold water pipe.

[0009] The invention is further configured such that: a first outer tube is rotatably and permeable through the side of the sealing cap; an annular sealing plate is fixedly installed on the outer circumferential side of the first outer tube; the inner end of the first outer tube is sealed, and a connecting pipe is provided on its circumferential side; a second outer tube is rotatably and permeable through the outer end of the first outer tube; one end of the second outer tube is sealed, and a first inner tube is fixedly and permeable through its end; a second inner tube is rotatably and permeable through the end of the first inner tube; the second inner tube passes through one end of the first outer tube; baffles are fixed at the ends of the spiral dosing pipe and the first spiral cold water pipe away from the sealing cap, and the ends of the two pipes near the sealing cap are respectively connected to the connecting pipe and the second inner tube via flexible hoses.

[0010] The invention is further configured such that: a second fixing ring is fixed to the outer circumferential side of the second outer tube; a T-shaped seat is fixed to the circumferential side of the second fixing ring; the T-shaped seat is fixedly installed on the surface of the support plate by fastening bolts; an ear tube is provided in communication with the outer circumferential side of the second outer tube; the ear tube and the end of the first inner tube are respectively connected to an external neutralizing agent solution delivery pipe and a cold water pipe; the dosing branch pipe is connected to an external coagulant solution delivery pipe; a gear ring is fixed to the outer circumferential side of the first outer tube; a servo motor is fixedly installed on the side of the sealing cap; and a drive gear that meshes with the gear ring is fixed to the output end of the servo motor.

[0011] The invention is further configured such that: a discharge pipe is connected to the output end of the pH adjusting cylinder; the discharge pipe is fixedly connected to the tail end of the spiral conveying pipe via a connecting flange; an inlet pipe is connected through the side of the sedimentation tank near its top; the inlet pipe is fixedly connected to the head end of the spiral conveying pipe via a connecting flange; a sludge suction pipe is connected to the side of the sedimentation tank near its bottom; a liquid suction pipe is connected to the side of the sedimentation tank at its middle section; the head ends of the second spiral cold water pipe and the third spiral cold water pipe are both connected to inlet pipes, and their tail ends are both connected to drain pipes; both ends of the second spiral cold water pipe and the third spiral cold water pipe are sealed.

[0012] The invention is further configured as follows: a controller is fixedly installed on the side of the sedimentation tank; the output end of the controller is electrically connected to a servo motor; a Z-shaped plate is fixed on the circumferential side of the second fixing ring; an extension plate is fixed on the side of the sealing cover; coaxial support rings are fixed at the ends of the Z-shaped plate and the extension plate; a driven gear that meshes with a gear ring is rotatably arranged between the two support rings; annular grooves that rotatably engage with the support rings are opened on both opposite sides of the driven gear; a first I-shaped take-up roller is fixed on one side of the driven gear; a second I-shaped take-up roller is fixed on the side of the baffle; a Z-shaped guide rope tube is fixed inside the pH adjusting cylinder; an L-shaped guide rope tube is fixed through the side of the sedimentation tank; a first pull rope and a second pull rope are respectively wound on the first I-shaped take-up roller and the second I-shaped take-up roller; a rubber ball is connected between the ends of the first pull rope and the second pull rope; bristles are evenly arranged on the outer circumferential side of the rubber ball; the outer diameter of the rubber ball is smaller than the inner diameter of the spiral conveying pipe.

[0013] The invention is further configured such that: a plurality of exhaust pipes are arranged in a linear array through the outer periphery of the pH adjusting cylinder; a piston cylinder is connected to the top of the exhaust pipes; an air extraction pipe is connected to the periphery of the piston cylinder near its bottom; a one-way valve is provided on both the exhaust pipes and the air extraction pipe; a piston plate is slidably arranged inside the piston cylinder; a connecting rod is fixed to the top of the piston plate; a ball head is fixed to the top of the connecting rod; a vertical plate is fixed to the periphery of the pH adjusting cylinder; a sleeve is fixed to the side of the vertical plate; a rotating rod that rotatably engages with the sleeve is fixed to the side of the first I-shaped take-up roller; a plurality of cams adapted to the corresponding ball heads are evenly fixed to the periphery of the rotating rod; and a return spring is fixed between the piston plate and the inner bottom surface of the piston cylinder.

[0014] The advantages of this invention are: 1. This invention adds neutralizing agent solution and coagulant solution sequentially inside the pH adjustment cylinder and spiral conveying pipe, respectively, so that the anodizing production wastewater undergoes a neutralization reaction before coagulation, avoiding the heat generated by the neutralization reaction from affecting the coagulation reaction, and improving the treatment effect of anodizing production wastewater.

[0015] 2. This invention improves the mixing reaction effect of the neutralizing agent solution and wastewater inside the pH adjustment cylinder by using a rotating spiral dosing pipe and a first spiral cooling water pipe. The cold water discharged from the first spiral cooling water pipe cools down the heat generated by the reaction inside the pH adjustment cylinder, preventing the solution temperature after the neutralization reaction from being too high and affecting the subsequent coagulation reaction. At the same time, the second and third spiral cooling water pipes cool down the spiral conveying pipe, further reducing the temperature of the solution inside the spiral conveying pipe and improving the coagulation effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an anodizing wastewater treatment system according to the present invention.

[0017] Figure 2 This is a schematic diagram of the sedimentation tank of the present invention.

[0018] Figure 3 For the present invention Figure 2 Enlarged view of region A.

[0019] Figure 4 This is a structural schematic diagram of the sedimentation tank of the present invention from another angle.

[0020] Figure 5 This is a schematic diagram of the front-end drug delivery section of the present invention.

[0021] Figure 6 For the present invention Figure 5 Enlarged view of region B.

[0022] Figure 7This is a schematic diagram of the front-end drug delivery section of the present invention from another angle.

[0023] Figure 8 This is a structural schematic diagram of the front-end drug delivery section of the present invention from a frontal view.

[0024] Figure 9 For the present invention Figure 8 Enlarged view of region C.

[0025] Figure 10 This is a schematic diagram of the structure of the middle drug delivery section of the present invention.

[0026] Figure 11 This is a structural schematic diagram of the middle drug delivery section of the present invention from a frontal view.

[0027] In the diagram: 1. Sedimentation tank; 2. Mid-section dosing section; 3. Front-end dosing section; 4. pH adjustment cylinder; 5. Spiral dosing pipe; 6. Drain pipe; 7. Spiral conveying pipe; 8. Dosing branch pipe; 9. Second spiral cold water pipe; 10. Third spiral cold water pipe; 11. Support plate; 12. First fixing ring; 13. Anodizing wastewater conveying pipe; 14. Sealing cap; 15. Annular sealing plate; 16. Arc-shaped scraper; 17. Rotating ring; 18. Ear plate; 19. First outer pipe; 20. Second outer pipe; 21. First inner pipe; 22. Second inner pipe; 23. Baffle; 24. Second fixing ring; 25. T-shaped seat; 26. Ear tube; 27. Gear ring; 28. Servo motor; 29. ​​Drive gear; 3 0. Liquid inlet pipe; 31. Sludge suction pipe; 32. Liquid suction pipe; 33. Water inlet pipe; 34. Drain pipe; 35. Controller; 36. Z-shaped plate; 37. Extension plate; 38. Support ring; 39. Driven gear; 40. First I-shaped take-up roller; 41. Second I-shaped take-up roller; 42. Z-shaped guide rope tube; 43. L-shaped guide rope tube; 44. First pull rope; 45. Second pull rope; 46. Rubber ball; 47. Brush bristles; 48. Exhaust pipe; 49. Piston cylinder; 50. Air extraction pipe; 51. Piston plate; 52. Connecting rod; 53. Ball head; 54. Vertical plate; 55. Sleeve; 56. Rotating rod; 57. Cam; 58. First spiral cold water pipe; 59. Discharge pipe; 60. Connecting pipe. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0031] Example 1, please refer to Figure 1-11 The present invention provides the following technical solutions: An anodizing wastewater treatment system specifically includes a sedimentation tank 1; a mid-terminal dosing section 2 is provided at the input end of the sedimentation tank 1; a front-end dosing section 3 is provided at the input end of the mid-terminal dosing section 2; the front-end dosing section 3 includes a pH adjusting cylinder 4; a spiral dosing pipe 5 and a first spiral cold water pipe 58 are rotatably arranged inside the pH adjusting cylinder 4; a drain pipe 6 is uniformly connected to the circumference of the spiral dosing pipe 5 and the first spiral cold water pipe 58; a one-way valve is provided on the drain pipe 6; the mid-terminal dosing section 2 includes a spiral conveying pipe 7; the tail end and the top end of the spiral conveying pipe 7 are fixedly connected to the output end of the pH adjusting cylinder 4 and the input end of the sedimentation tank 1, respectively; a dosing branch pipe 8 is inclined upwards and connected to the spiral conveying pipe 7 at the middle and top positions; a second spiral cold water pipe 9 and a third spiral cold water pipe 10, which are adapted to it, are fixed to the inner and outer circumferences of the spiral conveying pipe 7, respectively.

[0032] A one-way valve is installed on the corresponding drain pipe 6 so that the neutralizing agent solution in the spiral dosing pipe 5 and the cold water inside the first spiral cold water pipe 58 can only be discharged into the pH adjusting cylinder 4 through the corresponding drain pipe 6, while the solution inside the pH adjusting cylinder 4 cannot enter the spiral dosing pipe 5 and the first spiral cold water pipe 58.

[0033] Working principle of this embodiment: By adding the neutralizing agent solution and the coagulant solution sequentially into the pH adjustment cylinder 4 and the spiral conveying pipe 7, the anodizing wastewater undergoes a neutralization reaction before coagulation, thus avoiding the heat generated by the neutralization reaction from affecting the coagulation reaction and improving the treatment effect of the anodizing wastewater.

[0034] The rotating spiral dosing pipe 5 and the first spiral cooling water pipe 58 enhance the mixing reaction between the neutralizing agent solution and wastewater inside the pH adjusting cylinder 4. The cold water discharged from the first spiral cooling water pipe 58 cools down the heat generated by the reaction inside the pH adjusting cylinder 4, preventing the solution temperature after the neutralization reaction from being too high and affecting the subsequent coagulation reaction. At the same time, the second spiral cooling water pipe 9 and the third spiral cooling water pipe 10 lower the temperature of the spiral conveying pipe 7, further reducing the temperature of the solution inside the spiral conveying pipe 7 and improving the coagulation effect.

[0035] Example 2, please refer to Figure 1-11 This second embodiment is an improvement on the first embodiment. Specifically, the front-end dosing section 3 also includes a support plate 11; a first fixing ring 12 is fixed at the end of the support plate 11; the first fixing ring 12 is fixedly installed on the outer side of the pH adjusting cylinder 4 by fastening bolts; an anodizing wastewater conveying pipe 13 is connected to the outer side of the pH adjusting cylinder 4 near its input end.

[0036] A sealing cover 14 is fixedly installed at the input end of the pH adjusting cylinder 4 by fastening bolts; an annular sealing plate 15 is provided on the inner wall of the sealing cover 14 for sealing rotation; an arc-shaped scraper 16 is fixed on the side of the annular sealing plate 15 to rotate and cooperate with the inner wall of the pH adjusting cylinder 4; a rotating ring 17 is fixed on the arc-shaped scraper 16; an ear plate 18 is fixed between the rotating ring 17 and the spiral dosing pipe 5 and the first spiral cold water pipe 58.

[0037] A first outer tube 19 is rotatably and permeable through the side of the sealing cap 14; an annular sealing plate 15 is fixedly installed on the outer circumferential side of the first outer tube 19; the inner end of the first outer tube 19 is sealed, and a connecting pipe 60 is connected to its circumferential side; a second outer tube 20 is rotatably and permeable through the outer end of the first outer tube 19; one end of the second outer tube 20 is sealed, and a first inner tube 21 is fixedly and permeable through its end; a second inner tube 22 is rotatably and permeable through the end of the first inner tube 21; the second inner tube 22 passes through one end of the first outer tube 19; a baffle 23 is fixed at the ends of the spiral dosing pipe 5 and the first spiral cold water pipe 58 away from the sealing cap 14, and the ends of the two pipes near the sealing cap 14 are respectively connected to the connecting pipe 60 and the second inner tube 22 through flexible hoses.

[0038] Several connecting rods are evenly fixed between the first outer tube 19 and the second inner tube 22, so that the second inner tube 22 can rotate synchronously with the first outer tube 19.

[0039] Rotary sealing technology is a technique that prevents liquid or gas from leaking along the axial direction by placing sealing material on two surfaces perpendicular to the axial direction. At the same time, this sealing technology can also reduce friction and reduce energy consumption. The main principle is to use the small annular gap formed between the sealing material and the mating surface of the shaft or bushing to prevent liquid or gas from leaking out of the gap. This is existing technology and will not be described in detail again.

[0040] A second fixing ring 24 is fixed to the outer periphery of the second outer tube 20; a T-shaped seat 25 is fixed to the periphery of the second fixing ring 24; the T-shaped seat 25 is fixed to the surface of the support plate 11 by fastening bolts; an ear tube 26 is connected to the outer periphery of the second outer tube 20; the ends of the ear tube 26 and the first inner tube 21 are respectively connected to the external neutralizing agent solution delivery pipe and the cold water pipe; the dosing branch pipe 8 is connected to the external coagulant solution delivery pipe; a toothed ring 27 is fixed to the outer periphery of the first outer tube 19; a servo motor 28 is fixedly installed on the side of the sealing cover 14; a drive gear 29 that meshes with the toothed ring 27 is fixed to the output end of the servo motor 28.

[0041] By placing the sealing cap 14 on the end of the pH regulating cylinder 4, the annular sealing plate 15 plays a sealing role. The sealing cap 14 is fixedly installed on the end of the pH regulating cylinder 4 by fastening bolts. Then, the T-shaped seat 25 is fixedly installed on the surface of the support plate 11 by fastening bolts. At this time, the two sets of support rings 38 are rotatably set in the annular grooves on the two opposite sides of the driven gear 39. The gear ring 27 meshes with the drive gear 29 and the driven gear 39 respectively.

[0042] The output end of the pH adjusting cylinder 4 is connected to a discharge pipe 59; the discharge pipe 59 is fixedly connected to the tail end of the spiral conveying pipe 7 via a connecting flange; a liquid inlet pipe 30 is provided through the side of the sedimentation tank 1 near its top; the liquid inlet pipe 30 is fixedly connected to the head end of the spiral conveying pipe 7 via a connecting flange; a sludge suction pipe 31 is provided through the side of the sedimentation tank 1 near its bottom; a liquid suction pipe 32 is provided through the side of the sedimentation tank 1 at its middle position; the head ends of the second spiral cold water pipe 9 and the third spiral cold water pipe 10 are both connected to a water inlet pipe 33, and the tail ends of both are connected to a drain pipe 34; both ends of the second spiral cold water pipe 9 and the third spiral cold water pipe 10 are sealed.

[0043] Solenoid valves electrically connected to the output terminal of the controller 35 are installed on the sludge suction pipe 31, the water inlet pipe 33, the drainage pipe 34, and the anodizing wastewater conveying pipe 13.

[0044] Working principle of this embodiment two: Anodizing wastewater is introduced into the pH adjustment cylinder 4 through the anodizing wastewater delivery pipe 13, while neutralizing agent solution is introduced into the spiral dosing pipe 5 through the ear tube 26. Cold water is introduced into the first spiral cold water pipe 58 through the first inner pipe 21. The neutralizing agent solution flows into the pH adjustment cylinder 4 through the corresponding drain pipe 6 to neutralize the anodizing wastewater, thereby adjusting the pH of the anodizing wastewater. The cold water cools the neutralization reaction and improves the effect of the subsequent coagulation reaction.

[0045] The servo motor 28 is controlled to drive the drive gear 29 to rotate slowly, thereby driving the first outer tube 19 and the second inner tube 22 to rotate slowly and synchronously. This, in turn, drives the spiral dosing tube 5 and the first spiral cold water tube 58 to rotate slowly and synchronously, improving the mixing efficiency of the neutralizing agent solution, cold water and anodizing wastewater. During this process, the arc-shaped scraper 16 rotates synchronously with the annular sealing plate 15, rotating and scraping the inner wall of the pH adjustment cylinder 4. The sludge adhering to the inner wall of the pH adjustment cylinder 4 is scraped off and discharged from the pH adjustment cylinder 4 with the water flow.

[0046] After pH adjustment, the anodizing wastewater is discharged through discharge pipe 59 to spiral conveying pipe 7. Coagulant solution is added to the upper part of spiral conveying pipe 7 through each group of dosing branch pipes 8, and pre-coagulation reaction is carried out with the wastewater being transported inside spiral conveying pipe 7. The conveying of the spiral conveying pipe 7 prolongs the pre-reaction time between the wastewater and the coagulant solution, improving the subsequent wastewater sedimentation efficiency and effect. During this process, cold water is introduced into the second spiral cold water pipe 9 and the third spiral cold water pipe 10 to improve the cooling effect on the wastewater in spiral conveying pipe 7, further improving the effect of pre-coagulation reaction and avoiding the wastewater temperature being too high, which would affect the pre-coagulation and subsequent coagulation effects.

[0047] Example 3, please refer to Figure 1-11 This third embodiment is an improvement on the second embodiment as follows: Specifically, a controller 35 is fixedly installed on the side of the sedimentation tank 1; the output end of the controller 35 is electrically connected to the servo motor 28; a Z-shaped plate 36 is fixed on the circumference of the second fixing ring 24; an extension plate 37 is fixed on the side of the sealing cover 14; coaxial support rings 38 are fixed at the ends of the Z-shaped plate 36 and the extension plate 37; a driven gear 39 that meshes with the gear ring 27 is rotatably arranged between the two support rings 38; annular grooves that rotatably engage with the support rings 38 are opened on both opposite sides of the driven gear 39; A first I-shaped take-up roller 40 is fixed to one side of the driven gear 39; a second I-shaped take-up roller 41 is fixed to the side of the baffle 23; a Z-shaped guide rope tube 42 is fixed inside the pH adjusting cylinder 4; an L-shaped guide rope tube 43 is fixed through the side of the sedimentation tank 1; a first pull rope 44 and a second pull rope 45 are respectively wound on the first I-shaped take-up roller 40 and the second I-shaped take-up roller 41; a rubber ball 46 is connected between the ends of the first pull rope 44 and the second pull rope 45; bristles 47 are evenly arranged on the outer circumference of the rubber ball 46; the outer diameter of the rubber ball 46 is smaller than the inner diameter of the spiral conveying pipe 7.

[0048] The fact that the outer diameter of the rubber ball 46 is smaller than the inner diameter of the spiral conveying pipe 7 means that the rubber ball 46 can slide freely in the spiral conveying pipe 7 without affecting the normal conveying of wastewater.

[0049] Working principle of this embodiment three: During the slow clockwise rotation of the first outer tube 19, the second I-shaped take-up roller 41 at the end of the spiral dosing tube 5 rotates slowly clockwise, winding up the second pull rope 45. Simultaneously, it drives the driven gear 39 to rotate slowly counterclockwise, which in turn drives the first I-shaped take-up roller 40 to unwind the first pull rope 44 counterclockwise. This causes the rubber ball 46 to move along the spiral conveying tube 7 from top to bottom. The bristles 47 clean the sludge adhering to the inner wall of the spiral conveying tube 7, and the cleaned sludge is discharged with the flowing wastewater. During the slow counterclockwise rotation of the first outer tube 19, the unwinding of the second pull rope 45 is completed. During this process, the first I-shaped take-up roller 40 rotates slowly clockwise, winding up the first pull rope 44. In summary, controlling the servo motor 28 to periodically and slowly rotate in both directions causes the rubber ball 46 to slide back and forth periodically along the spiral conveying tube 7, preventing blockage of the spiral conveying tube 7.

[0050] Example 4, please refer to Figure 1-11 This fourth embodiment is an improvement on the third embodiment. Specifically, a number of exhaust pipes 48 are arranged in a linear array and are connected through the outer periphery of the pH adjusting cylinder 4; a piston cylinder 49 is connected to the top of the exhaust pipe 48; an air extraction pipe 50 is connected to the periphery of the piston cylinder 49 near its bottom; and a one-way valve is provided on both the exhaust pipe 48 and the air extraction pipe 50.

[0051] By setting a one-way valve on the exhaust pipe 48, air in the piston cylinder 49 can only enter the pH adjustment cylinder 4 through the exhaust pipe 48; by setting a one-way valve on the suction pipe 50, external air can only be drawn into the piston cylinder 49 through the suction pipe 50.

[0052] A piston plate 51 is slidably disposed inside the piston cylinder 49; a connecting rod 52 is fixed to the top of the piston plate 51; a ball head 53 is fixed to the top of the connecting rod 52; a vertical plate 54 is fixed to the side of the pH adjusting cylinder 4; a sleeve 55 is fixed to the side of the vertical plate 54; a rotating rod 56 that rotates with the sleeve 55 is fixed to the side of the first I-shaped take-up roller 40; several cams 57 that are adapted to the corresponding ball heads 53 are evenly fixed to the side of the rotating rod 56; a return spring is fixed between the piston plate 51 and the inner bottom surface of the piston cylinder 49.

[0053] Working principle of Example 4: The servo motor 28 is controlled to rotate slowly in both directions periodically, thereby driving the first I-shaped take-up roller 40 and the rotating rod 56 to rotate synchronously and slowly in both directions periodically. Under the elastic force of the return spring, the piston plate 51 is driven to slide up along the inner wall of the piston cylinder 49 until the ball head 53 is pressed against the lowest position of the cam 57. During this process, external air is drawn into the piston cylinder 49. When the rotating rod 56 drives the cam 57 to rotate, the cam 57 gradually squeezes the ball head 53, driving the piston plate 51 to slide down along the inner wall of the piston cylinder 49. The air inside the piston cylinder 49 is discharged into the pH adjusting cylinder 4 through the exhaust pipe 48, realizing aeration and increasing the dissolved oxygen content inside the pH adjusting cylinder 4, thereby improving the subsequent reaction effect.

[0054] A method for treating wastewater from an anodizing production process includes the following steps: T1. Wastewater and neutralizing agent solution are injected into the pH adjustment cylinder 4 through the anodizing wastewater delivery pipe 13 and the spiral dosing pipe 5 to adjust the pH of the injected wastewater. During this process, cold water is injected through the first spiral cold water pipe 58 to cool down the heat generated during the neutralization reaction.

[0055] T2. After cooling and pH adjustment, the wastewater enters the spiral conveying pipe 7. Coagulant solution is added to the spiral conveying pipe 7 through the dosing branch pipe 8 to achieve the dosing of coagulant solution into the wastewater, complete the pre-coagulation, and extend the fusion path between the wastewater and the coagulant solution. During this process, the cold water flowing in the second spiral cold water pipe 9 and the third spiral cold water pipe 10 further cools the heat inside the spiral conveying pipe 7.

[0056] T3. The wastewater that has been neutralized and pre-coagulated is discharged into the sedimentation tank 1 for coagulation and sedimentation. The sludge after sedimentation is pumped away through the sludge pumping pipe 31, and the supernatant is pumped away through the liquid pumping pipe 32.

[0057] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0061] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A wastewater treatment system for anodizing production, comprising a sedimentation tank (1); characterized in that: The sedimentation tank (1) is provided with a middle dosing section (2) at its input end; the middle dosing section (2) is provided with a front dosing section (3) at its input end. The front-end dosing section (3) includes a pH adjusting cylinder (4); the pH adjusting cylinder (4) is rotatably equipped with a spiral dosing tube (5) and a first spiral cold water tube (58) that fit together; the spiral dosing tube (5) and the first spiral cold water tube (58) are uniformly connected to each other on their circumferential sides by a drain pipe (6); a one-way valve is provided on the drain pipe (6); The middle dosing section (2) includes a spiral conveying pipe (7); the tail end and the top end of the spiral conveying pipe (7) are fixedly connected to the output end of the pH adjusting cylinder (4) and the input end of the sedimentation tank (1), respectively; the spiral conveying pipe (7) is inclined upward and connected to a dosing branch pipe (8) at the middle and top positions; the inner and outer circumferential sides of the spiral conveying pipe (7) are respectively fixed with a second spiral cold water pipe (9) and a third spiral cold water pipe (10) that are adapted to it. The pH adjusting cylinder (4) has a sealing cap (14) fixedly installed at its input end by fastening bolts; a first outer tube (19) is rotatably and permeable through the side of the sealing cap (14); the inner end of the first outer tube (19) is sealed, and a connecting pipe (60) is connected to its circumferential side; a second outer tube (20) is rotatably and permeable through the outer end of the first outer tube (19); one end of the second outer tube (20) is sealed, and a first inner tube (21) is fixedly and permeable through its end; a second inner tube (22) is rotatably and permeable through the end of the first inner tube (21); the second inner tube (22) is rotatably and permeable through one end of the first outer tube (19); The spiral dosing pipe (5) and the first spiral cold water pipe (58) are fixed with baffles (23) at the ends away from the sealing cap (14), and the ends of the two pipes near the sealing cap (14) are respectively connected to the connecting pipe (60) and the second inner pipe (22) through flexible hoses; the second outer pipe (20) is fixed with a second fixing ring (24) on the outer circumference side; the first outer pipe (19) is fixed with a toothed ring (27) on the outer circumference side. The second fixing ring (24) is fixed with a Z-shaped plate (36) on its circumferential side; the sealing cover (14) is fixed with an extension plate (37) on its side; the Z-shaped plate (36) and the extension plate (37) are both fixed with coaxial support rings (38); a driven gear (39) that meshes with the gear ring (27) is rotatably arranged between the two support rings (38); the driven gear (39) has an annular groove on both opposite sides that rotatably engages with the support ring (38); A first I-shaped take-up roller (40) is fixed to one side of the driven gear (39); a second I-shaped take-up roller (41) is fixed to the side of the baffle (23); a Z-shaped guide rope tube (42) is fixed inside the pH adjusting cylinder (4); an L-shaped guide rope tube (43) is fixed through the side of the sedimentation tank (1); a first pull rope (44) and a second pull rope (45) are respectively wound on the first I-shaped take-up roller (40) and the second I-shaped take-up roller (41); a rubber ball (46) is connected between the ends of the first pull rope (44) and the second pull rope (45); bristles (47) are evenly arranged on the outer circumference of the rubber ball (46); the outer diameter of the rubber ball (46) is smaller than the inner diameter of the spiral conveying pipe (7); the rubber ball (46) can slide freely inside the spiral conveying pipe (7).

2. The anodizing wastewater treatment system according to claim 1, characterized in that: The front-end dosing section (3) also includes a support plate (11); a first fixing ring (12) is fixed at the end of the support plate (11); the first fixing ring (12) is fixedly installed on the outer side of the pH adjusting cylinder (4) by fastening bolts; an anodized wastewater conveying pipe (13) is connected to the outer side of the pH adjusting cylinder (4) near its input end.

3. The anodizing wastewater treatment system according to claim 2, characterized in that: The inner wall of the sealing cap (14) is provided with an annular sealing plate (15) for sealing rotation; the annular sealing plate (15) is fixedly installed on the outer circumferential side of the first outer tube (19); the side of the annular sealing plate (15) is fixed with an arc-shaped scraper (16) that rotates with the inner wall of the pH adjusting cylinder (4). A rotating ring (17) is fixed on the arc-shaped scraper (16); an ear plate (18) is fixed between the rotating ring (17) and the spiral dosing pipe (5) and the first spiral cold water pipe (58).

4. The anodizing wastewater treatment system according to claim 3, characterized in that: A T-shaped seat (25) is fixed to the circumference of the second fixing ring (24); the T-shaped seat (25) is fixed to the surface of the support plate (11) by fastening bolts; an ear tube (26) is provided on the outer circumference of the second outer tube (20); the ends of the ear tube (26) and the first inner tube (21) are respectively connected to the external neutralizing agent solution delivery pipe and the cold water pipe; the dosing branch pipe (8) is connected to the external coagulant solution delivery pipe; a servo motor (28) is fixedly installed on the side of the sealing cover (14); a controller (35) is fixedly installed on the side of the sedimentation tank (1); the output end of the controller (35) is electrically connected to the servo motor (28); The output end of the servo motor (28) is fixed with a drive gear (29) that meshes with the gear ring (27).

5. The anodizing wastewater treatment system according to claim 4, characterized in that: The output end of the pH adjusting cylinder (4) is connected to a discharge pipe (59); the discharge pipe (59) is fixedly connected to the tail end of the spiral conveying pipe (7) through a connecting flange; the side of the sedimentation tank (1) is connected to a liquid inlet pipe (30) near its top; the liquid inlet pipe (30) is fixedly connected to the head end of the spiral conveying pipe (7) through a connecting flange. The sedimentation tank (1) has a mud suction pipe (31) connected to its bottom on its side; the sedimentation tank (1) has a liquid suction pipe (32) connected to its middle part on its side; the first end of the second spiral cold water pipe (9) and the third spiral cold water pipe (10) are both connected to a water inlet pipe (33), and the last end of the second spiral cold water pipe (9) and the third spiral cold water pipe (10) are both connected to a drain pipe (34); the first and last ends of the second spiral cold water pipe (9) and the third spiral cold water pipe (10) are both sealed.

6. The anodizing wastewater treatment system according to claim 5, characterized in that: The pH adjusting cylinder (4) has several exhaust pipes (48) arranged in a linear array on its outer periphery; a piston cylinder (49) is connected to the top of the exhaust pipe (48); a suction pipe (50) is connected to the periphery of the piston cylinder (49) near its bottom; and a one-way valve is provided on both the exhaust pipe (48) and the suction pipe (50). A piston plate (51) is slidably disposed inside the piston cylinder (49); a connecting rod (52) is fixed to the top of the piston plate (51); a ball head (53) is fixed to the top of the connecting rod (52); a vertical plate (54) is fixed to the periphery of the pH adjusting cylinder (4); a sleeve (55) is fixed to the side of the vertical plate (54); a rotating rod (56) that rotates with the sleeve (55) is fixed to the side of the first I-shaped take-up roller (40); a number of cams (57) that are adapted to the corresponding ball heads (53) are evenly fixed to the periphery of the rotating rod (56); a return spring is fixed between the piston plate (51) and the inner bottom surface of the piston cylinder (49).

7. The treatment method of an anodizing production wastewater treatment system according to claim 6, characterized in that, Includes the following steps: T1. Wastewater and neutralizing agent solution are injected into the pH adjustment cylinder (4) through the anodized wastewater delivery pipe (13) and the spiral dosing pipe (5) to complete the pH adjustment of the injected wastewater. During this process, cold water is injected through the first spiral cold water pipe (58) to cool down the heat generated during the neutralization reaction. T2. After cooling and pH adjustment, the wastewater enters the spiral conveying pipe (7). Coagulant solution is added to the spiral conveying pipe (7) through the dosing branch pipe (8) to realize the dosing of wastewater coagulant solution, complete pre-coagulation, and extend the fusion path of wastewater and coagulant solution. During this process, the cold water flowing in the second spiral cold water pipe (9) and the third spiral cold water pipe (10) further cools the heat inside the spiral conveying pipe (7). T3. The wastewater that has been neutralized and pre-coagulated is discharged into the sedimentation tank (1) for coagulation and sedimentation. The sludge after sedimentation is pumped away through the sludge pumping pipe (31), and the supernatant is pumped away through the liquid pumping pipe (32).

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