A device for treating wastewater in a hydrogen peroxide production process

Abstract

The present application relates to the technical field of hydrogen peroxide production wastewater treatment, and particularly relates to a hydrogen peroxide production wastewater treatment device, which comprises a support assembly, the upper end of the support assembly is provided with a pretreatment assembly, the lower part of the pretreatment assembly is provided with a treatment cylinder, the treatment cylinder is provided with a stirring assembly, and the upper end of the support assembly is further provided with an automatic adding assembly for adding lime milk and flocculating agent into the treatment cylinder. The automatic adding assembly composed of a buoyancy ring, a lifting rod, a gear and a toothed plate, the lime milk adding cylinder and the flocculating agent adding cylinder with specific inner diameters, realize accurate addition of lime milk and flocculating agent; the components such as a tilting device, a zero-speed switch, a controller and a time delay switch are used to ensure that the lime milk is added first to adjust the pH value of the wastewater, and then the flocculating agent is added for flocculation reaction, the flocculating agent is added at the appropriate time, the correct adding sequence is ensured, and the wastewater treatment efficiency and effect are improved.

Description

Technical Field

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

[0002] Hydrogen peroxide, also known as hydrogen peroxide solution, is an inorganic compound. Its aqueous solution is suitable for medical wound disinfection, environmental disinfection, and food disinfection. Under normal circumstances, it slowly decomposes into water and oxygen; the decomposition rate is extremely slow. Methods to accelerate the reaction include adding a catalyst or irradiating with short-wave radiation. However, the wastewater discharged during production has a high CODcr level and a light orange color. By adding ferrous sulfate and oxidizing with hydrogen peroxide, as described in, for example, a wastewater treatment device for hydrogen peroxide production disclosed in Chinese patent publication CN215712294U, which adds lime slurry and flocculants to the wastewater discharged during production, the CODcr and color of the discharged water can meet emission standards.

[0003] Current wastewater treatment methods mostly involve manually adding lime slurry and flocculants. Lime slurry effectively neutralizes acidic substances in wastewater, while flocculants help suspended solids in the wastewater aggregate into larger particles, facilitating sedimentation and further reducing water pollution levels. However, in practical applications, the following shortcomings exist:

[0004] The dosage of flocculants and lime slurry is often difficult to control precisely. For lime slurry, the addition ratio to wastewater volume is generally about 1%-3% in hydrogen peroxide production wastewater treatment. If the addition is insufficient, the pH value of the wastewater cannot be adjusted to a suitable range, affecting the precipitation effect of heavy metals. If the addition is excessive, the pH value of the wastewater will be too high, which is also not conducive to subsequent treatment and may lead to problems such as pipe scaling, resulting in unstable treatment effect and even negative environmental impact. The addition ratio of flocculants to wastewater volume is 0.1%-0.2%. If the addition is too small, it will not effectively promote the coagulation of suspended particles and colloids, making it difficult for pollutants in the wastewater to be precipitated and removed, and the effluent quality will not meet the standards. If too much is added, it may waste flocculants, increase treatment costs, and excessive flocculants may remain in the treated water, causing secondary pollution to the environment.

[0005] In practice, the order in which the flocculants are added also has a significant impact on the wastewater treatment effect. Generally, lime slurry should be added first to adjust the pH value of the wastewater, creating a suitable acid-base environment that is conducive to the subsequent flocculation reaction. This order ensures that the flocculant works effectively in a suitable environment, improving the efficiency and effect of wastewater treatment. If the order is reversed, the flocculant may not be able to work effectively, affecting the sedimentation effect and the quality of the effluent. Summary of the Invention

[0006] To address the aforementioned shortcomings of existing technologies, this invention provides a wastewater treatment device for hydrogen peroxide production processes, which effectively solves the problems of existing technologies lacking the function of precisely adding lime slurry and flocculants to wastewater, and being unable to ensure the order of adding lime slurry and flocculants.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a wastewater treatment device for hydrogen peroxide production, including a support assembly, a pretreatment assembly at the upper end of the support assembly, a treatment cylinder below the pretreatment assembly, a stirring assembly inside the treatment cylinder, and an automatic adding assembly for adding lime slurry and flocculant to the treatment cylinder at the upper end of the support assembly.

[0009] The automatic addition component includes a buoyancy ring that is raised and lowered inside the treatment cylinder. Two lifting rods are provided at the upper end of the buoyancy ring. The upper ends of the two lifting rods are fixedly connected to an active toothed plate. An equipment box is provided on the outer side of the active toothed plate. A large gear that meshes with the active toothed plate is rotatably provided on the inner side wall of the equipment box. A small gear is coaxially fixedly connected to the large gear. A driven toothed plate that meshes with the small gear is slidably provided on the inner side wall of the equipment box. A pressure plate is fixedly connected to the end of the driven toothed plate near the pretreatment component. A lime slurry addition structure and a flocculant addition structure are provided below the pressure plate.

[0010] According to the wastewater treatment device in the hydrogen peroxide production process described above, the support assembly includes a support plate, two pads are symmetrically fixedly connected to the lower end of the support plate, a rotating groove that is wider at the top and narrower at the bottom is opened at the upper end of the support plate, and the treatment cylinder is rotatably connected to the rotating groove. Multiple support rods are fixedly connected to the upper end of the support plate, and a top plate is fixedly connected to the upper end of the multiple support rods.

[0011] According to the above-mentioned wastewater treatment device in a hydrogen peroxide production process, the pretreatment component includes a pretreatment box fixedly connected to the upper end of a top plate, a drain hole communicating with a treatment cylinder at the lower end of the pretreatment box, a filter screen fixedly installed at the drain hole, and a reciprocating screw rotatably connected to the upper side of the pretreatment box, with a slider threaded onto the shaft of the reciprocating screw.

[0012] According to the wastewater treatment device in the hydrogen peroxide production process described above, the pretreatment tank has two slag discharge ports symmetrically opened at both ends. A sliding cavity is provided on the upper side of the slag discharge port inside the pretreatment tank. A baffle is slidably connected to the sliding cavity. Multiple limiting springs are fixedly connected between the baffle and the sliding cavity. Two wedge blocks are symmetrically fixedly connected to both ends of the slider and are slidably connected to the bottom wall of the pretreatment tank. A stop rod corresponding to the position of the wedge block is fixedly connected to the opposite end of each of the two baffles.

[0013] According to the wastewater treatment device in the hydrogen peroxide production process described above, the stirring assembly includes a mounting box located at the lower end of a support plate. Multiple connecting rods are fixedly connected between the mounting box and a pad. A driving bevel gear is rotatably connected to the inner side wall of the mounting box. A rotary motor for driving the driving bevel gear is fixedly installed on the outer side of the mounting box. An upper driven bevel gear and a lower driven bevel gear, meshing with the driving bevel gear, are rotatably installed on the inner top and bottom walls of the mounting box, respectively. A connecting cylinder is fixedly connected between the upper driven bevel gear and the treatment cylinder. A stirring shaft is fixedly connected to the upper end of the lower driven bevel gear. The upper end of the stirring shaft passes through the upper driven bevel gear and the connecting cylinder, extending into the interior of the treatment cylinder. Multiple stirring rods are fixedly connected to the shaft body of the stirring shaft inside the treatment cylinder.

[0014] According to the above-mentioned wastewater treatment device in a hydrogen peroxide production process, a linkage component is also included. The linkage component includes a small bevel gear meshing with an upper driven bevel gear inside a mounting box. A rotating rod is coaxially fixedly connected to the end of the small bevel gear away from the rotating motor. A transmission structure is provided between the rotating rod and the reciprocating lead screw.

[0015] According to the wastewater treatment device in the hydrogen peroxide production process described above, two lifting grooves are symmetrically opened on the inner side wall of the treatment cylinder. Lifting blocks are slidably connected to the lifting grooves. A buoyancy ring is fixedly connected to the lifting blocks. A guide rod for guiding the lifting blocks is fixedly connected inside the lifting grooves. An annular groove is opened at the upper end of the buoyancy ring. A rotating block is slidably connected to the annular groove. The two lifting rods are fixedly connected to the upper end of the rotating block.

[0016] According to the wastewater treatment device in the above-mentioned hydrogen peroxide production process, the equipment box has a movable groove at one end near the treatment cylinder. A connecting block passing through the movable groove is fixedly connected to one end of the driven toothed plate near the treatment cylinder. A pressure plate is fixedly connected to the connecting block. The pressure plate includes a fixed plate fixedly connected to the connecting block. A sliding groove is provided, and a telescopic plate is slidably connected to the sliding groove. Multiple return springs are fixedly connected between the telescopic plate and the sliding groove. A horizontal plate is fixedly connected to one side of the telescopic plate. The lime slurry addition structure and the flocculant addition structure are packaged... A U-shaped frame is fixedly connected to the upper end of the top plate. A lime slurry adding cylinder and a flocculant adding cylinder are fixedly connected through the U-shaped frame at intervals. A first piston plate and a second piston plate are slidably connected to the lime slurry adding cylinder and the flocculant adding cylinder, respectively. A first vertical rod and a second vertical rod are fixedly connected to the upper ends of the first piston plate and the second piston plate, respectively. The first vertical rod and the second vertical rod are both located directly below the pressure plate. A feeding cylinder is provided directly below the flocculant adding cylinder, and the lower end of the feeding cylinder is connected to the processing cylinder. A tilting device is provided inside the feeding cylinder.

[0017] According to the above-mentioned wastewater treatment device in a hydrogen peroxide production process, the device includes a receiving cylinder suspended inside a feeding cylinder. The outer walls on both sides of the receiving cylinder are fixedly connected to the inner wall of the receiving cylinder by connecting chains. A water pipe is provided above the receiving cylinder, and a water pump is connected to the other end of the water pipe. A zero-speed switch is installed on the active toothed plate, and the zero-speed switch is connected to a controller. The water pump is electrically connected to a time delay switch, and the controller is signal-connected to the time delay switch.

[0018] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0019] 1. This invention utilizes an automatic addition assembly consisting of a buoyancy ring, lifting rod, gears, and toothed plates, along with lime slurry and flocculant addition cylinders with specifically designed inner diameters. This enables precise addition of lime slurry and flocculant. For example, with lime slurry and flocculant addition amounts of 2% and 0.2% of the wastewater, respectively, the inner diameter of the lime slurry addition cylinder is one-twenty-fifth of the treatment cylinder, and the inner diameter of the flocculant addition cylinder is one-tenth of the inner diameter of the lime slurry addition cylinder. This allows for precise control of the addition amount, avoiding adverse effects on treatment efficiency and the environment caused by improper addition, effectively reducing treatment costs and secondary pollution.

[0020] 2. This invention utilizes components such as a tilter, a zero-speed switch, a controller, and a time-delay switch to ensure that lime slurry is added first to adjust the pH value of the wastewater, and then flocculant is added to carry out the flocculation reaction. When the water level in the treatment cylinder rises, it drives the buoyancy ring to rise, and the pressure plate first presses down the first vertical rod to add lime slurry. Then, through the cooperation of the control device and the tilter, flocculant is added at the appropriate time, ensuring the correct addition sequence and improving the wastewater treatment efficiency and effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is a structural schematic diagram of the present invention viewed from a first perspective.

[0023] Figure 2 This is a structural schematic diagram from a second perspective of the present invention;

[0024] Figure 3 This is a structural schematic diagram of the invention from a third perspective;

[0025] Figure 4 This is a structural schematic diagram of the present invention viewed from a fourth perspective.

[0026] Figure 5 for Figure 4 Enlarged structural diagram of section A;

[0027] Figure 6 This is a structural schematic diagram of the present invention viewed from a fifth perspective.

[0028] Figure 7 for Figure 6 Enlarged structural diagram of section B;

[0029] Figure 8 for Figure 3 A schematic diagram of the internal structure of the mounting box.

[0030] Reference numerals: 1. Support assembly; 11. Support plate; 12. Pad; 13. Rotating groove; 14. Support rod; 15. Top plate; 2. Processing cylinder; 3. Pretreatment assembly; 31. Pretreatment box; 32. Drain hole; 33. Filter screen; 34. Reciprocating screw; 35. Slider; 36. Wedge block; 37. Baffle; 38. Limiting spring; 39. Push rod; 4. Stirring assembly; 41. Connecting rod; 42. Mounting box; 43. Driving bevel gear; 44. Upper driven bevel gear; 45. Lower driven bevel gear; 46. Connecting cylinder; 47. Stirring shaft; 48. Stirring rod; 5. Linkage assembly; 51. Small bevel gear; 52. Rotating rod; 53. Transmission structure; 6. Automatic adding assembly; 61. 62. Lifting trough; 63. Lifting block; 64. Buoyancy ring; 65. Guide rod; 66. Lifting rod; 67. Annular groove; 68. Rotating block; 69. Active gear plate; 60. Equipment box; 610. Driven gear plate; 611. Large gear; 612. Small gear; 613. Movable groove; 614. Connecting block; 616. Telescopic plate; 617. Return spring; 618. Horizontal plate; 619. U-shaped frame; 620. Lime slurry adding cylinder; 621. First piston plate; 622. First vertical rod; 623. Flocculant adding cylinder; 624. Second piston plate; 625. Second vertical rod; 626. Discharge cylinder; 627. Incliner; 6271. Receiving cylinder; 6272. Connecting chain; 628. Water pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to embodiments.

[0033] Example: Refer to Figures 1 to 8 A wastewater treatment device in a hydrogen peroxide production process includes a support assembly 1. Specifically, the support assembly 1 includes a support plate 11. Two pads 12 are symmetrically fixedly connected to the lower end of the support plate 11. A rotating groove 13 with a wider top and narrower bottom is opened at the upper end of the support plate 11, and the treatment cylinder 2 is rotatably connected to the rotating groove 13. Multiple support rods 14 are fixedly connected to the upper end of the support plate 11, and a top plate 15 is fixedly connected to the upper end of the multiple support rods 14. The support assembly 1 provides support and installation for the device and provides an installation foundation.

[0034] A pretreatment component 3 is provided at the upper end of the support component 1. Specifically, the pretreatment component 3 includes a pretreatment box 31 fixedly connected to the upper end of the top plate 15. The lower end of the pretreatment box 31 has a drain hole 32 communicating with the treatment cylinder 2. A filter screen 33 is fixedly installed at the drain hole 32. A reciprocating screw 34 is rotatably connected to the upper side of the pretreatment box 31. A slider 35 is threadedly sleeved on the body of the reciprocating screw 34. When the reciprocating screw 34 rotates, the slider 35 threadedly connected to it reciprocates within the pretreatment box 31. During the movement, the wedge blocks 36 at both ends of the slider 35 push the abutment rod 39, causing the baffle 37 to move to both sides against the elastic force of the limiting spring 38, opening the slag discharge port, and discharging the impurities on the filter screen, thus realizing the pretreatment process and reducing the pressure on subsequent wastewater treatment.

[0035] Two slag discharge ports are symmetrically opened at both ends of the pretreatment box 31. A sliding cavity is opened on the upper side of the slag discharge port inside the pretreatment box 31. A baffle 37 is slidably connected to the sliding cavity. Multiple limiting springs 38 are fixedly connected between the baffle 37 and the sliding cavity. Two wedge blocks 36 are symmetrically fixedly connected to both ends of the slider 35 and are slidably connected to the bottom wall of the pretreatment box 31. A stop rod 39 corresponding to the position of the wedge block 36 is fixedly connected to the opposite end of the two baffles 37. When the reciprocating screw 34 rotates, the slider 35 threaded to it moves back and forth in the pretreatment box 31. During the movement, the wedge blocks 36 at both ends of the slider 35 push the stop rod 39, causing the baffle 37 to move to both sides against the elastic force of the limiting springs 38, opening the slag discharge port and discharging the impurities on the filter screen to realize the pretreatment process. When no slag is discharged, the multiple limiting springs 38 seal the slag discharge port under the elastic force of the baffle 37 to prevent wastewater from splashing out.

[0036] A treatment cylinder 2 is provided below the pretreatment component 3. The lower end of the treatment cylinder 2 has an outlet. After the treatment is completed, the clean water in the treatment cylinder 2 can be discharged from the outlet at the lower end.

[0037] A stirring assembly 4 is installed inside the processing cylinder 2. Specifically, the stirring assembly 4 includes a mounting box 42 located at the lower end of the support plate 11. Multiple connecting rods 41 are fixedly connected between the mounting box 42 and the pad plate 12. A driving bevel gear 43 is rotatably connected to the inner side wall of the mounting box 42. A rotary motor for driving the driving bevel gear 43 is fixedly installed on the outer side of the mounting box 42. An upper driven bevel gear 44 and a lower driven bevel gear 45, which mesh with the driving bevel gear 43, are rotatably installed on the inner top wall and inner bottom wall of the mounting box 42, respectively. The upper driven bevel gear 44 is fixedly connected to the processing cylinder 2. A connecting cylinder 46 is connected to the upper end of the lower driven bevel gear 45, and a stirring shaft 47 is fixedly connected to it. The upper end of the stirring shaft 47 passes through the upper driven bevel gear 44 and the connecting cylinder 46 and extends into the interior of the treatment cylinder 2. Multiple stirring rods 48 are fixedly connected to the shaft body of the stirring shaft 47 inside the treatment cylinder 2. A rotary motor drives the driving bevel gear 43 to rotate, which in turn causes the upper driven bevel gear 44 and the lower driven bevel gear 45 to rotate. The upper driven bevel gear 44 and the lower driven bevel gear 45 rotate in opposite directions, realizing the stirring action of the rotation of the treatment cylinder 2 and the reverse rotation of the stirring shaft 47, so that the wastewater treatment is more thorough.

[0038] It also includes a linkage component 5, which includes a small bevel gear 51 that meshes with the upper driven bevel gear 44 inside the mounting box 42. The end of the small bevel gear 51 away from the rotary motor is coaxially fixedly connected to a rotating rod 52. A transmission structure 53 is provided between the rotating rod 52 and the reciprocating screw 34. Through the linkage component 5, the operation of the stirring component 4 can drive the rotation of the reciprocating screw 34 in the pretreatment component 3, so as to realize the coordinated work of the pretreatment and stirring processes.

[0039] The upper end of the support component 1 is also provided with an automatic addition component 6 for adding lime slurry and flocculant to the treatment cylinder 2. Specifically, the automatic addition component 6 includes a buoyancy ring 63 that is raised and lowered inside the treatment cylinder 2. The upper end of the buoyancy ring 63 is provided with two lifting rods 65. Two lifting grooves 61 are symmetrically opened on the inner side wall of the treatment cylinder 2. Lifting blocks 62 are slidably connected to the lifting grooves 61. The buoyancy ring 63 is fixedly connected to the lifting blocks 62. A guide rod 64 for guiding the lifting blocks 62 is fixedly connected inside the lifting grooves 61 to ensure that the buoyancy ring 63 rises and falls smoothly.

[0040] The upper end of the buoyancy ring 63 is provided with an annular groove 66, and a rotating block 67 is slidably connected to the annular groove 66. Two lifting rods 65 are fixedly connected to the upper end of the rotating block 67. The lower end of the rotating block 67 is fitted with balls to reduce the friction generated when the rotating block 67 rotates with the annular groove 66, making its rotation process smoother. The annular groove 66 and the rotating block 67 are set to prevent motion interference between the lifting rods 65 and the processing cylinder 2 when the processing cylinder 2 rotates.

[0041] The upper ends of the two lifting rods 65 are fixedly connected to an active toothed plate 68. An equipment box 69 is provided on the outer side of the active toothed plate 68. A large gear 611 that meshes with the active toothed plate 68 is rotatably provided on the inner side wall of the equipment box 69. A small gear 612 is coaxially fixedly connected to the large gear 611. A driven toothed plate 610 that meshes with the small gear 612 is slidably provided on the inner side wall of the equipment box 69. A pressure plate is fixedly connected to the end of the driven toothed plate 610 near the pretreatment component 3. A lime milk adding structure and a flocculant adding structure are provided below the pressure plate.

[0042] The equipment box 69 has a movable groove 613 at one end near the processing cylinder 2. A connecting block 614 passing through the movable groove 613 is fixedly connected to the driven toothed plate 610 at one end near the processing cylinder 2. A pressure plate is fixedly connected to the connecting block 614. The pressure plate includes a fixed plate 615 fixedly connected to the connecting block 614. The 615 has a sliding groove, and a telescopic plate 616 is slidably connected to the sliding groove. Multiple return springs 617 are fixedly connected between the telescopic plate 616 and the sliding groove. A horizontal plate 618 is fixedly connected to one side of the telescopic plate 616. (The text abruptly ends here, likely due to an incomplete sentence or missing information.) The lime milk addition structure and flocculant addition structure include a U-shaped frame 619 fixedly connected to the upper end of the top plate 15. The U-shaped frame 619 is fixedly connected to the lime milk addition cylinder 620 and the flocculant addition cylinder 623 at intervals. The telescopic plate 616 is located directly above the lime milk addition cylinder 620, and the horizontal plate 618 is located directly above the flocculant addition cylinder 623. The telescopic plate 616 and the horizontal plate 618 can be horizontally extended and retracted to facilitate the addition of lime milk and flocculant required for wastewater treatment into the lime milk addition cylinder 620 and the flocculant addition cylinder 623.

[0043] The lime slurry adding cylinder 620 and the flocculant adding cylinder 623 are slidably connected to a first piston plate 621 and a second piston plate 624, respectively. A first vertical rod 622 and a second vertical rod 625 are fixedly connected to the upper ends of the first piston plate 621 and the second piston plate 624, respectively. Both the first vertical rod 622 and the second vertical rod 625 are located directly below the pressure plate. A feeding cylinder 626 is located directly below the flocculant adding cylinder 623, and the lower end of the feeding cylinder 626 is connected to the treatment cylinder 2. The design dimensions are based on the addition amount of lime slurry and flocculant being a percentage of the wastewater volume. Taking 2% and 0.2% as an example, the inner diameter of the lime slurry addition cylinder 620 is one twenty-fifth of the treatment cylinder 2, and the inner diameter of the flocculant addition cylinder 623 is one-tenth of the inner diameter of the lime slurry addition cylinder 620. When the buoyancy ring 63 rises and drives the pressure plate to fall, the pressure plate presses down the first vertical rod 622, causing the first piston plate 621 to move downward in the lime slurry addition cylinder 620. According to the above dimensional relationship, lime slurry accounting for 2% of the wastewater is added to the treatment cylinder 2 (since the amount of lime slurry is small, the rise of the buoyancy ring 63 caused by the addition of lime slurry to the wastewater is ignored).

[0044] A tilting device 627 is installed inside the feeding cylinder 626. The tilting device 627 is designed to tilt due to gravity when empty. When a certain amount of liquid is added, the center of gravity changes, and the container can stand upright. However, when the container is full, the center of gravity is too high, and the container cannot maintain balance and tipes over.

[0045] The tilting device 627 includes a receiving cylinder 6271 suspended inside the feeding cylinder 626. The capacity of the receiving cylinder 6271 is greater than the amount of flocculant added when the treatment cylinder 2 is filled with wastewater, ensuring that the receiving cylinder 6271 will not overflow when only flocculant is added. Connecting chains 6272 are fixedly connected between the outer walls on both sides of the receiving cylinder 6271 and its inner wall. A water pipe 628 is installed above the receiving cylinder 6271, and a water pump is connected to the other end of the water pipe 628. A zero-speed switch is installed on the active toothed plate 68. The zero-speed switch is connected to... The system is equipped with a controller, and the water pump is electrically connected to a time-delay switch. The controller is signal-connected to the time-delay switch. When wastewater is injected into the treatment cylinder 2 and the wastewater level rises, the buoyancy ring 63 rises, which drives the two active toothed plates 68 to rise through the lifting rod 65. Through gear transmission, the driven toothed plate 610 moves downward, and the pressure plate presses down the first vertical rod 622 and the second vertical rod 625. First, lime slurry is added to the treatment cylinder 2. Then, through the cooperation of the tilting device 627 and the control device, flocculant is added at the appropriate time to achieve precise addition and the correct addition sequence.

[0046] The specific working principle of this invention is as follows:

[0047] The rotary motor is started, which drives the active bevel gear 43 to rotate, thereby causing the upper driven bevel gear 44 and the lower driven bevel gear 45 to rotate. The upper driven bevel gear 44 and the lower driven bevel gear 45 rotate in opposite directions, realizing the stirring action of the treatment cylinder 2 rotating and the stirring shaft 47 rotating in opposite directions. The stirring rod 48 on the stirring shaft 47 stirs the wastewater in the treatment cylinder 2. At the same time, the treatment cylinder 2 and the stirring shaft 47 rotate in opposite directions, further increasing the turbulence effect.

[0048] Simultaneously, when the driven bevel gear 44 rotates, the small bevel gear 51 meshing with it drives the rotating rod 52 to rotate. The rotating rod 52, through the transmission structure 53, causes the reciprocating screw 34 to rotate. When the reciprocating screw 34 rotates, the slider 35, which is threadedly connected to it, moves back and forth within the pretreatment box 31. During the movement, the wedge blocks 36 at both ends of the slider 35 push the abutment rod 39, causing the baffle 37 to overcome the elastic force of the limiting spring 38 and move to both sides, opening the slag discharge port and discharging the impurities on the filter screen, thus realizing the pretreatment process and reducing the pressure on subsequent wastewater treatment.

[0049] As wastewater increases in treatment cylinder 2, the water level rises, causing the buoyancy ring 63 to rise under buoyancy. The buoyancy ring 63 then rises smoothly along the guide rod 64 within the lifting groove 61 via the lifting block 62. The rotating block 67 rotates within the annular groove 66, causing the cylinder and cylinder 65 to rotate relative to each other. This prevents the lifting rod 65 from affecting the rotation by following the buoyancy ring 63. The lifting rod 65 drives the active gear plate 68 to rise, meshing with the large gear 611. Since the large gear is twice the size of the small gear, the rotation of the large gear 611 drives the coaxial small gear 612 to rotate. The small gear 612 meshes with the driven gear plate 610, causing the driven gear plate 610 to slide along the inner wall of the equipment box 69. The driven gear plate 610 then drives the pressure plate to descend via the connecting block 614.

[0050] In terms of design dimensions, taking the addition of lime slurry and flocculant as 2% and 0.2% of the wastewater, respectively, the inner diameter of the lime slurry adding cylinder 620 is one-twenty-fifth of the treatment cylinder 2, and the inner diameter of the flocculant adding cylinder 623 is one-tenth of the inner diameter of the lime slurry adding cylinder 620. When the buoyancy ring 63 rises and drives the pressure plate to fall, the pressure plate presses down on the first vertical rod 622, causing the first piston plate 621 to move downward in the lime slurry adding cylinder 620. According to the above dimensional relationship, lime slurry accounting for 2% of the wastewater is added to the treatment cylinder 2 (since the amount of lime slurry is small, the rise of the buoyancy ring 63 caused by the addition of lime slurry to the wastewater is ignored). At the same time, the flocculant is squeezed into the receiving cylinder 6271. The lime slurry is used for neutralization reaction, precipitation reaction, removal of acidic substances and softening of water in wastewater treatment.

[0051] At this time, the zero-speed switch on the active toothed plate 68 detects that the active toothed plate 68 has stopped rising (i.e., the water level in the treatment cylinder 2 no longer rises). The zero-speed switch transmits a signal to the controller, which controls the delay switch. The delay time is fifteen minutes. During these fifteen minutes, the stirring component 4 continuously stirs and mixes the wastewater with added lime slurry, allowing the lime slurry to fully react with the wastewater. After fifteen minutes, the delay switch controls the water pump to start. The water pump injects water into the container 6271 of the tilter 627 through the water pipe 628. When the container 6271 is full of liquid, it flips under the gravity of the water. Due to the relationship between the inner diameter of the flocculant adding cylinder 623 and the inner diameter of the lime slurry adding cylinder 620, exactly 0.2% of the flocculant in the wastewater can be added to the treatment cylinder 2, completing the flocculant addition process and ensuring the correct order of adding lime slurry first and then flocculant.

[0052] Throughout the wastewater treatment process, the stirring component 4 continuously stirs the wastewater, ensuring that the lime slurry, flocculant, and wastewater are fully mixed and reacted, thereby improving the treatment effect. After treatment, the clean water in the treatment cylinder 2 can be discharged from the outlet at the bottom, achieving the purification treatment of the wastewater.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wastewater treatment device for hydrogen peroxide production process, characterized in that, It includes a support component (1), a pretreatment component (3) is provided at the upper end of the support component (1), a treatment cylinder (2) is provided below the pretreatment component (3), a stirring component (4) is provided inside the treatment cylinder (2), and an automatic adding component (6) for adding lime milk and flocculant to the treatment cylinder (2) is also provided at the upper end of the support component (1). The support assembly (1) includes a support plate (11), two pads (12) are symmetrically fixedly connected to the lower end of the support plate (11), and a rotating groove (13) with a wider upper end and a narrower lower end is opened at the upper end of the support plate (11). The processing cylinder (2) is rotatably connected to the rotating groove (13). Multiple support rods (14) are fixedly connected to the upper end of the support plate (11), and a top plate (15) is fixedly connected to the upper end of the multiple support rods (14). The stirring assembly (4) includes a mounting box (42) disposed at the lower end of a support plate (11). A plurality of connecting rods (41) are fixedly connected between the mounting box (42) and the pad (12). A drive bevel gear (43) is rotatably connected to the inner side wall of the mounting box (42). A rotary motor for driving the drive bevel gear (43) is fixedly installed on the outer side of the mounting box (42). The inner top wall and inner bottom wall of the mounting box (42) are respectively rotatably mounted with the drive bevel gear (43). The upper driven bevel gear (44) and the lower driven bevel gear (45) mesh together. A connecting cylinder (46) is fixedly connected between the upper driven bevel gear (44) and the processing cylinder (2). A stirring shaft (47) is fixedly connected to the upper end of the lower driven bevel gear (45). The upper end of the stirring shaft (47) extends through the upper driven bevel gear (44) and the connecting cylinder (46) into the interior of the processing cylinder (2). Multiple stirring rods (48) are fixedly connected to the shaft body of the stirring shaft (47) inside the processing cylinder (2). The automatic addition component (6) includes a buoyancy ring (63) that is raised and lowered inside the treatment cylinder (2). The upper end of the buoyancy ring (63) is provided with two lifting rods (65). The upper ends of the two lifting rods (65) are fixedly connected to an active toothed plate (68). An equipment box (69) is provided on the outer side of the active toothed plate (68). A large gear (611) that meshes with the active toothed plate (68) is rotatably provided on the inner side wall of the equipment box (69). A small gear (612) is fixedly connected to the large gear (611) on the same axis. A driven toothed plate (610) that meshes with the small gear (612) is slidably provided on the inner side wall of the equipment box (69). A pressure plate is fixedly connected to one end of the driven toothed plate (610) near the pretreatment component (3). A lime milk addition structure and a flocculant addition structure are provided below the pressure plate.

2. The wastewater treatment device in a hydrogen peroxide production process according to claim 1, characterized in that, The pretreatment component (3) includes a pretreatment box (31) fixedly connected to the upper end of the top plate (15). The lower end of the pretreatment box (31) is provided with a drain hole (32) communicating with the treatment cylinder (2). A filter screen (33) is fixedly installed at the drain hole (32). A reciprocating screw (34) is rotatably connected to the upper side of the pretreatment box (31). A slider (35) is threaded onto the rod body of the reciprocating screw (34).

3. The wastewater treatment device in the hydrogen peroxide production process according to claim 2, characterized in that, The pretreatment box (31) has two slag discharge ports symmetrically opened at both ends. The pretreatment box (31) has a sliding cavity on the upper side of the slag discharge port. The sliding cavity is slidably connected to a baffle (37). Multiple limiting springs (38) are fixedly connected between the baffle (37) and the sliding cavity. The two ends of the slider (35) are symmetrically fixedly connected to two wedge blocks (36) that are in contact with and slidably connected to the bottom wall of the pretreatment box (31). The opposite ends of the two baffles (37) are fixedly connected to a stop rod (39) corresponding to the position of the wedge block (36).

4. The wastewater treatment device in a hydrogen peroxide production process according to claim 3, characterized in that, It also includes a linkage component (5), which includes a small bevel gear (51) meshing with the upper driven bevel gear (44) in the mounting box (42). The end of the small bevel gear (51) away from the rotary motor is coaxially fixedly connected to a rotating rod (52). A transmission structure (53) is provided between the rotating rod (52) and the reciprocating screw (34).

5. The wastewater treatment device in a hydrogen peroxide production process according to claim 1, characterized in that, The inner wall of the processing cylinder (2) has two symmetrically opened lifting grooves (61). The lifting grooves (61) are slidably connected to lifting blocks (62). The buoyancy ring (63) is fixedly connected to the lifting blocks (62). The lifting grooves (61) are fixedly connected to guide rods (64) for guiding the lifting blocks (62). The upper end of the buoyancy ring (63) is provided with an annular groove (66). The annular groove (66) is slidably connected to a rotating block (67). The two lifting rods (65) are fixedly connected to the upper end of the rotating block (67).

6. The wastewater treatment device in a hydrogen peroxide production process according to claim 5, characterized in that, The equipment box (69) has a movable groove (613) at one end near the treatment cylinder (2). The driven toothed plate (610) is fixedly connected to a connecting block (614) passing through the movable groove (613) at one end near the treatment cylinder (2). The connecting block (614) is fixedly connected to a pressure plate. The pressure plate includes a fixing plate (615) fixedly connected to the connecting block (614). The (615) has a sliding groove. The sliding groove is slidably connected to a telescopic plate (616). Multiple return springs (617) are fixedly connected between the telescopic plate (616) and the sliding groove. A horizontal plate (618) is fixedly connected to one side of the telescopic plate (616). The lime milk adding structure and the flocculant adding structure include a U-shaped frame (619) fixedly connected to the upper end of the top plate (15). The U-shaped frame (619) is fixedly connected to a lime slurry adding cylinder (620) and a flocculant adding cylinder (623) at intervals. The lime slurry adding cylinder (620) and the flocculant adding cylinder (623) are slidably connected to a first piston plate (621) and a second piston plate (624), respectively. The upper ends of the first piston plate (621) and the second piston plate (624) are fixedly connected to a first vertical rod (622) and a second vertical rod (625), respectively. The first vertical rod (622) and the second vertical rod (625) are both located directly below the pressure plate. A feeding cylinder (626) is provided directly below the flocculant adding cylinder (623), and the lower end of the feeding cylinder (626) is connected to the processing cylinder (2). A tilting device (627) is provided inside the feeding cylinder (626).

7. The wastewater treatment device in a hydrogen peroxide production process according to claim 6, characterized in that, The tilting device (627) includes a receiving cylinder (6271) suspended inside the feeding cylinder (626). Both outer walls of the receiving cylinder (6271) are fixedly connected to the inner wall of the receiving cylinder (6271) by connecting chains (6272). A water pipe (628) is provided above the receiving cylinder (6271). The other end of the water pipe (628) is connected to a water pump. A zero-speed switch is installed on the active toothed plate (68). The zero-speed switch is connected to a controller. The water pump is electrically connected to a time delay switch. The controller is signal-connected to the time delay switch.

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