Wastewater treatment device in hydrogen peroxide production process

Abstract

The invention relates to the technical field of wastewater treatment in a hydrogen peroxide production process, in particular to a wastewater treatment device in a hydrogen peroxide production process, which comprises a supporting assembly, a pretreatment assembly is arranged at the upper end of the supporting assembly, a treatment cylinder is arranged below the pretreatment assembly, and a stirring assembly is arranged in the treatment cylinder. An automatic adding assembly for adding lime milk and a flocculating agent into the treatment barrel is also arranged at the upper end of the supporting assembly. The automatic adding assembly composed of the buoyancy ring, the lifting rod, the gear, the toothed plate and the like is matched with the lime milk adding cylinder and the flocculating agent adding cylinder which are designed in a specific inner diameter mode, and accurate adding of lime milk and a flocculating agent is achieved; by utilizing the components such as the lopsided vessel, the zero-speed switch, the controller and the delay switch, lime milk is firstly added to adjust the pH value of the wastewater, then a flocculating agent is added to carry out a flocculation reaction, and the flocculating agent is added at a proper time, so that a correct adding sequence is ensured, and the wastewater treatment efficiency and effect are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment in the production process of hydrogen peroxide, and particularly relates to a wastewater treatment device in a hydrogen peroxide production process. Background Art

[0002] Hydrogen peroxide is hydrogen peroxide, an inorganic compound. Its aqueous solution is suitable for medical wound disinfection, environmental disinfection, and food disinfection. Under normal circumstances, it will slowly decompose into water and oxygen, and its decomposition rate is extremely slow. The method to accelerate its reaction rate is to add a catalyst or irradiate it with short-wave rays. However, the sewage discharged during production has a relatively high CODcr and is light orange. Under the condition of adding ferrous sulfate, hydrogen peroxide oxidation is adopted. For example, a wastewater treatment device for hydrogen peroxide production disclosed in Chinese authorized publication number CN215712294U adds lime milk and a flocculant to the sewage discharged during production for treatment, so that the CODcr and chromaticity of the drainage meet the discharge standards.

[0003] Most of the existing sewage treatment is to manually add lime milk and a flocculant. Lime milk can effectively neutralize the acidic substances in the wastewater, and the flocculant can help the suspended substances in the wastewater aggregate to form larger particles, facilitating sedimentation and further reducing the pollution degree of water. However, in practical applications, there are the following deficiencies:

[0004] 1. The addition amounts of the flocculant and lime milk are often difficult to accurately control. For lime milk, generally, the addition amount in the treatment of hydrogen peroxide production wastewater is about 1%-3% of the volume ratio of the wastewater. If the addition amount is insufficient, the pH value of the wastewater cannot be adjusted to the appropriate range, affecting the heavy metal precipitation effect. If the addition amount is excessive, the pH value of the wastewater will be too high, which is also not conducive to subsequent treatment, and may cause problems such as pipeline scaling, resulting in unstable treatment effects and even possible negative impacts on the environment; the addition amount of the flocculant is 0.1%-0.2% of the volume ratio of the wastewater. If the addition amount is too small, it cannot effectively promote the aggregation of suspended particles and colloids, making it difficult to precipitate and remove the pollutants in the wastewater, and the water quality of the effluent does not meet the standards. If the addition amount is too much, it may cause waste of the flocculant, increase the treatment cost, and excessive flocculant may remain in the treated water, causing secondary pollution to the environment.

[0005] 2. In actual operation, the addition order also has an important impact on the wastewater treatment effect. Generally, lime milk should be added first to adjust the pH value of the wastewater to make the wastewater in a suitable pH environment, which is conducive to the subsequent flocculation reaction. Such an order can ensure that the flocculant plays a role in a suitable environment, improving the wastewater treatment efficiency and effect. If the order is reversed, the flocculant may not be able to effectively play its role, affecting the precipitation effect and the water quality of the effluent. Summary of the Invention

[0006] In view of the above-mentioned disadvantages of the prior art, the present invention provides a wastewater treatment device in a hydrogen peroxide production process, which can effectively solve the problems in the prior art of lacking the functions of accurately adding lime milk and flocculant to wastewater and being unable to ensure the order of adding lime milk and flocculant.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0008] The present invention provides a wastewater treatment device in a hydrogen peroxide production process, including a support assembly. At the upper end of the support assembly, a pretreatment assembly is provided. Below the pretreatment assembly, a treatment cylinder is provided. Inside the treatment cylinder, a stirring assembly is provided. At the upper end of the support assembly, an automatic addition assembly for adding lime milk and flocculant to the treatment cylinder is also provided:

[0009] The automatic addition assembly includes a buoyancy ring that is vertically arranged and lifted inside the treatment cylinder. At the upper end of the buoyancy ring, two lifting rods are provided. At the upper ends of the two lifting rods, a driving gear plate is fixedly connected together. Outside the driving gear plate, an equipment box is provided. On the inner side wall of the equipment box, a large gear that meshes with the driving gear plate is rotatably provided. The large gear is coaxially fixedly connected with a small gear. On the inner side wall of the equipment box, a driven gear plate that meshes with the small gear is slidably provided. At the end of the driven gear plate close to the pretreatment assembly, a pressing plate is fixedly connected. Below the pressing plate, a lime milk addition structure and a flocculant addition structure are provided.

[0010] According to the above-mentioned wastewater treatment device in a hydrogen peroxide production process, the support assembly includes a support plate. At the lower end of the support plate, two cushion blocks are symmetrically and fixedly connected. On the upper end of the support plate, a rotating groove that is wider at the top and narrower at the bottom is opened, and the treatment cylinder is rotatably connected to the rotating groove. On the upper end of the support plate, a plurality of support rods are fixedly connected. At the upper ends of the plurality of support rods, a top plate is fixedly connected together.

[0011] According to the above-mentioned wastewater treatment device in a hydrogen peroxide production process, the pretreatment assembly includes a pretreatment box fixedly connected to the upper end of the top plate. At the lower end of the pretreatment box, a water outlet hole communicating with the treatment cylinder is opened. At the water outlet hole, a filter screen is fixedly provided. Above the pretreatment box, a reciprocating lead screw is rotatably connected. A slider is threadedly sleeved on the rod body of the reciprocating lead screw.

[0012] According to the above-mentioned wastewater treatment device in a hydrogen peroxide production process, two slag discharge ports are symmetrically opened at both ends of the pretreatment box. Inside the pretreatment box, a sliding cavity is opened above the slag discharge port. A baffle is slidably connected to the sliding cavity. A plurality of limiting springs are fixedly connected between the baffle and the sliding cavity. At both ends of the slider, two wedge-shaped blocks that are in sliding connection with and attached to the inner bottom wall of the pretreatment box are symmetrically and fixedly connected. At the opposite ends of the two baffles, a resisting rod corresponding to the position of the wedge-shaped block is fixedly connected.

[0013] According to the wastewater treatment device in a hydrogen peroxide production process described above, the stirring assembly includes an installation box provided at the lower end of the support plate. A plurality of connecting rods are fixedly connected between the installation box and the backing plate. The inner side wall of the installation box is rotatably connected with a driving bevel gear. A rotating motor for driving the driving bevel gear to rotate is fixedly installed on the outer side of the installation box. The inner top wall and the inner bottom wall of the installation box are respectively rotatably installed with an upper driven bevel gear and a lower driven bevel gear that mesh with the driving bevel gear. A connecting cylinder is fixedly connected between the upper driven bevel gear and the treatment cylinder. The upper end of the lower driven bevel gear is fixedly connected with a stirring shaft. The upper end of the stirring shaft passes through the upper driven bevel gear and the connecting cylinder and extends into the interior of the treatment cylinder. A plurality of stirring rods are fixedly connected to the shaft body of the stirring shaft inside the treatment cylinder.

[0014] According to the wastewater treatment device in a hydrogen peroxide production process described above, it further includes a linkage assembly. The linkage assembly includes a small bevel gear that meshes with the upper driven bevel gear inside the installation box. A rotating rod is coaxially and fixedly connected to one 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 a hydrogen peroxide production process described above, two lifting grooves are symmetrically opened on the inner side wall of the treatment cylinder. The lifting grooves are slidably connected with lifting blocks. The buoyancy ring is fixedly connected with 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 in a limiting manner. Two lifting rods are fixedly connected to the upper end of the rotating block.

[0016] According to the wastewater treatment device in a hydrogen peroxide production process described above, an activity groove is opened at one end of the equipment box close to the treatment cylinder. A connecting block passing through the activity groove is fixedly connected to one end of the driven tooth plate close to the treatment cylinder. The connecting block is fixedly connected with a pressing plate. The pressing plate includes a fixing plate fixedly connected with the connecting block. A chute is opened. A telescopic plate is slidably connected to the chute. A plurality of reset springs are fixedly connected between the telescopic plate and the chute. A cross plate is fixedly connected to one side of the telescopic plate. The lime milk adding structure and the flocculant adding structure include a U-shaped frame fixedly connected to the upper end of the top plate. The U-shaped frame is fixedly connected with a lime milk adding cylinder and a flocculant adding cylinder at intervals through penetration. The lime milk adding cylinder and the flocculant adding cylinder are respectively slidably connected with a first piston plate and a second piston plate. The upper ends of the first piston plate and the second piston plate are respectively fixedly connected with a first vertical rod and a second vertical rod. The first vertical rod and the second vertical rod are both located directly below the pressing plate. A blanking cylinder is arranged directly below the flocculant adding cylinder, and the lower end of the blanking cylinder is communicated with the treatment cylinder. An inclined device is arranged inside the blanking cylinder.

[0017] According to the wastewater treatment device in a hydrogen peroxide production process described above, the tilting device includes a receiving cylinder suspended inside the feeding cylinder. Connecting chains are fixedly connected between the outer walls on both sides of the receiving cylinder and the inner wall of the receiving cylinder. A water pipe is arranged above the receiving cylinder, and the other end of the water pipe is connected to a water pump. A zero-speed switch is installed on the active tooth plate, the zero-speed switch is electrically connected to a controller, the water pump is electrically connected to a delay switch, and the controller is in signal connection with the delay switch.

[0018] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art:

[0019] 1. Through the automatic addition component composed of a buoyancy ring, a lifting rod, a gear, a tooth plate, etc., and in cooperation with the lime milk addition cylinder and the flocculant addition cylinder with a specific inner diameter design, the present invention realizes the precise addition of lime milk and flocculant. Taking the addition amounts of lime milk and flocculant as 2% and 0.2% of the wastewater respectively as an example, the inner diameter of the lime milk 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 milk addition cylinder, which can accurately control the addition amount, avoid the adverse effects on the treatment effect and the environment caused by improper addition amounts, effectively reduce the treatment cost and reduce secondary pollution.

[0020] 2. By using components such as a tilting device, a zero-speed switch, a controller, and a delay switch, the present invention ensures that lime milk is added first to adjust the pH value of the wastewater, and then a flocculant is added for a flocculation reaction. When the water level in the treatment cylinder rises to drive the buoyancy ring to rise, the pressing plate first presses down the first vertical rod to add lime milk, and then through the cooperation of the control device and the tilting device, the flocculant is added at an appropriate time, ensuring the correct addition sequence and improving the efficiency and effect of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of a first perspective cross-section of the present invention;

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

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

[0025] Figure 4 It is a schematic structural diagram of a fourth perspective cross-section of the present invention;

[0026] Figure 5 is Figure 4 A schematic structural diagram of the enlarged part A in

[0027] Figure 6 A schematic structural diagram of a fifth - perspective section of the present invention;

[0028] Figure 7 is Figure 6 A schematic structural diagram of the enlarged part B in

[0029] Figure 8 is Figure 3 A schematic structural diagram of the interior of the installation box in

[0030] Reference numerals: 1, support assembly; 11, support plate; 12, backing plate; 13, rotating groove; 14, support rod; 15, top plate; 2, treatment cylinder; 3, pretreatment assembly; 31, pretreatment box; 32, water - drainage hole; 33, filter screen; 34, reciprocating lead screw; 35, slider; 36, wedge - shaped block; 37, baffle; 38, limiting spring; 39, resisting rod; 4, stirring assembly; 41, connecting rod; 42, installation 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, lifting groove; 62, lifting block; 63, buoyancy ring; 64, guiding rod; 65, lifting rod; 66, annular groove; 67, rotating block; 68, driving toothed plate; 69, equipment box; 610, driven toothed plate; 611, large gear; 612, small gear; 613, moving groove; 614, connecting block; 616, telescopic plate; 617, reset spring; 618, cross - plate; 619, U - shaped frame; 620, lime - milk adding cylinder; 621, first piston plate; 622, first vertical rod; 623, flocculant adding cylinder; 624, second piston plate; 625, second vertical rod; 626, blanking cylinder; 627, tilting device; 6271, receiving cylinder; 6272, connecting chain; 628, water - connecting pipe. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

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

[0033] Example: Refer to Figures 1 to 8 , a wastewater treatment device in a hydrogen peroxide production process, including a support assembly 1. Specifically, the support assembly 1 includes a support plate 11. At the lower end of the support plate 11, two cushion blocks 12 are symmetrically and fixedly connected. At the upper end of the support plate 11, a rotation groove 13 that is wider at the top and narrower at the bottom is opened, and the treatment cylinder 2 is rotationally connected to the rotation groove 13. At the upper end of the support plate 11, a plurality of support rods 14 are fixedly connected, and the upper ends of the plurality of support rods 14 are jointly fixedly connected to a top plate 15. The support assembly 1 provides support and installation for the device, providing an installation foundation.

[0034] A pretreatment assembly 3 is arranged at the upper end of the support assembly 1. Specifically, the pretreatment assembly 3 includes a pretreatment box 31 fixedly connected to the upper end of the top plate 15. A water outlet hole 32 communicating with the treatment cylinder 2 is opened at the lower end of the pretreatment box 31. A filter screen 33 is fixedly arranged at the water outlet hole 32. A reciprocating lead screw 34 is rotationally connected to the upper side of the pretreatment box 31. A slider 35 is threadedly sleeved on the rod body of the reciprocating lead screw 34. When the reciprocating lead screw 34 rotates, the slider 35 threadedly connected thereto reciprocates in the pretreatment box 31. During the movement of the wedge-shaped blocks 36 at both ends of the slider 35, the push rods 39 are pushed, so that the baffle 37 moves to both sides against the elastic force of the limit spring 38, opening the slag discharge port and discharging the impurities on the filter screen 33, realizing the pretreatment process and reducing the subsequent treatment pressure on the wastewater.

[0035] Two slag discharge ports are symmetrically opened at both ends of the pretreatment box 31. A sliding cavity is opened above the slag discharge port in the pretreatment box 31. A baffle 37 is slidably connected to the sliding cavity. A plurality of limit springs 38 are fixedly connected between the baffle 37 and the sliding cavity. Two wedge-shaped blocks 36 that are slidably connected to and in contact with the inner bottom wall of the pretreatment box 31 are symmetrically and fixedly connected to both ends of the slider 35. A push rod 39 corresponding to the position of the wedge-shaped block 36 is fixedly connected to the relative end of each of the two baffles 37. When the reciprocating lead screw 34 rotates, the slider 35 threadedly connected thereto reciprocates in the pretreatment box 31. During the movement of the wedge-shaped blocks 36 at both ends of the slider 35, the push rods 39 are pushed, so that the baffle 37 moves to both sides against the elastic force of the limit spring 38, opening the slag discharge port and discharging the impurities on the filter screen 33, realizing the pretreatment process. And when slag is not discharged, under the elastic force of the plurality of limit springs 38 on the baffle 37, the slag discharge port is sealed to prevent wastewater from splashing out.

[0036] A treatment cylinder 2 is arranged below the pretreatment assembly 3. An outlet is opened at the lower end of the treatment cylinder 2. After the treatment is completed, the clear water in the treatment cylinder 2 can be discharged from the lower outlet.

[0037] A stirring assembly 4 is arranged inside the treatment cylinder 2. Specifically, the stirring assembly 4 includes an installation box 42 arranged at the lower end of the support plate 11. A plurality of connecting rods 41 are fixedly connected between the installation box 42 and the backing plate 12. The inner side wall of the installation box 42 is rotatably connected with a driving bevel gear 43. A rotating motor for driving the driving bevel gear 43 to rotate is fixedly installed on the outer side of the installation box 42. The inner top wall and the inner bottom wall of the installation box 42 are respectively rotatably installed with an upper driven bevel gear 44 and a lower driven bevel gear 45 that mesh with the driving bevel gear 43. A connecting cylinder 46 is fixedly connected between the upper driven bevel gear 44 and the treatment cylinder 2. The upper end of the lower driven bevel gear 45 is fixedly connected with a stirring shaft 47. 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. A plurality of stirring rods 48 are fixedly connected to the shaft body of the stirring shaft 47 inside the treatment cylinder 2. The rotating motor drives the driving bevel gear 43 to rotate, thereby driving the upper driven bevel gear 44 and the lower driven bevel gear 45 to rotate, and the upper driven bevel gear 44 and the lower driven bevel gear 45 rotate in opposite directions, realizing the stirring actions of the rotation of the treatment cylinder 2 and the reverse rotation of the stirring shaft 47, making the wastewater treatment more sufficient.

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

[0039] An automatic adding assembly 6 for adding lime milk and flocculant into the treatment cylinder 2 is further arranged at the upper end of the support assembly 1. Specifically, the automatic adding assembly 6 includes a buoyancy ring 63 arranged to be lifted and lowered inside the treatment cylinder 2. Two lifting rods 65 are arranged at the upper end of the buoyancy ring 63. Two lifting grooves 61 are symmetrically formed on the inner side wall of the treatment cylinder 2. The lifting grooves 61 are slidably connected with lifting blocks 62. The buoyancy ring 63 is fixedly connected with the lifting blocks 62. Guide rods 64 for guiding the lifting blocks 62 are fixedly connected inside the lifting grooves 61, ensuring the stable lifting and lowering of the buoyancy ring 63.

[0040] An annular groove 66 is formed at the upper end of the buoyancy ring 63. The annular groove 66 is connected with a rotating block 67 in a limiting and sliding manner. The two lifting rods 65 are fixedly connected to the upper end of the rotating block 67. A ball is embedded at the lower end of the rotating block 67, reducing the friction generated when the rotating block 67 rotates with the annular groove 66 and making its rotation process smoother. The annular groove 66 and the rotating block 67 are provided to prevent movement interference between the lifting rods 65 and the treatment cylinder 2 when the treatment cylinder 2 rotates.

[0041] The upper ends of two lifting rods 65 are fixedly connected together with a driving toothed plate 68. An equipment box 69 is arranged outside the driving toothed plate 68. A large gear 611 meshing with the driving toothed plate 68 is rotatably arranged on the inner side wall of the equipment box 69. The large gear 611 is coaxially and fixedly connected with a small gear 612. A driven toothed plate 610 meshing with the small gear 612 is slidably arranged on the inner side wall of the equipment box 69. One end of the driven toothed plate 610 close to the pretreatment assembly 3 is fixedly connected with a pressing plate. Below the pressing plate, a lime milk adding structure and a flocculant adding structure are arranged.

[0042] An activity slot 613 is formed at one end of the equipment box 69 close to the treatment cylinder 2. One end of the driven toothed plate 610 close to the treatment cylinder 2 is fixedly connected with a connecting block 614 passing through the activity slot 613. The connecting block 614 is fixedly connected with a pressing plate. The pressing plate includes a fixing plate 615 fixedly connected with the connecting block 614. A sliding slot is formed in the fixing plate 615. A telescopic plate 616 is slidably connected in the sliding slot. A plurality of reset springs 617 are fixedly connected between the telescopic plate 616 and the sliding slot. One side of the telescopic plate 616 is fixedly connected with a cross plate 618. 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 with a lime milk adding cylinder 620 and a flocculant adding cylinder 623 at intervals and penetratingly. The telescopic plate 616 is located directly above the lime milk adding cylinder 620. The cross plate 618 is located directly above the flocculant adding cylinder 623. The telescopic plate 616 and the cross plate 618 can be horizontally telescoped, facilitating the addition of lime milk and flocculant required for treating wastewater into the lime milk adding cylinder 620 and the flocculant adding cylinder 623.

[0043] A first piston plate 621 and a second piston plate 624 are respectively slidably connected in the lime milk adding cylinder 620 and the flocculant adding cylinder 623. The upper ends of the first piston plate 621 and the second piston plate 624 are respectively fixedly connected with a first vertical rod 622 and a second vertical rod 625. The first vertical rod 622 and the second vertical rod 625 are both located directly below the pressing plate. A blanking cylinder 626 is arranged directly below the flocculant adding cylinder 623, and the lower end of the blanking cylinder 626 is communicated with the treatment cylinder 2. In terms of design dimensions, taking the addition amounts of lime milk and flocculant as 2% and 0.2% of the wastewater as an example, the inner diameter of the lime milk adding cylinder 620 is one twenty-fifth of that 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 milk adding cylinder 620. When the buoyancy ring 63 rises to drive the pressing plate to descend, the pressing plate presses down the first vertical rod 622, causing the first piston plate 621 to move downward in the lime milk adding cylinder 620. According to the above size relationship, 2% of the lime milk accounting for the wastewater is added to the treatment cylinder 2 (since the amount of lime milk is small, the rise of the buoyancy ring 63 caused by adding lime milk into the wastewater is ignored).

[0044] There is an inclining device 627 inside the blanking cylinder 626. The design of the inclining device 627 makes it tilt due to gravity when it is empty. When a certain amount of liquid is added, the center of gravity changes and the container can stand upright. However, when the liquid is full, the center of gravity is too high and the container cannot maintain balance and will overturn.

[0045] The inclining device 627 includes a receiving cylinder 6271 suspended inside the blanking 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 pour out when only flocculant is added. Connecting chains 6272 are fixedly connected between the outer walls on both sides of the receiving cylinder 6271 and the inner wall of the receiving cylinder 6271. A water pipe 628 is arranged 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 tooth plate 68. The zero-speed switch is electrically connected to a controller. The water pump is electrically connected to a delay switch. The controller is signal-connected to the delay switch. When wastewater is injected into the treatment cylinder 2 and the wastewater level rises, the buoyancy ring 63 rises, driving the two active tooth plates 68 to rise through the lifting rod 65. Through gear transmission, the driven tooth plate 610 moves downward, and the pressing plate presses down the first vertical rod 622 and the second vertical rod 625. First, lime milk is added to the treatment cylinder 2, and then through the cooperation of the inclining device 627 and the control device, the flocculant is added at the appropriate time to achieve precise addition and the correct addition sequence.

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

[0047] Start the rotating motor. The rotating motor 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, and the upper driven bevel gear 44 and the lower driven bevel gear 45 rotate in opposite directions, realizing the rotation of the treatment cylinder 2 and the stirring action of the stirring shaft 47 rotating in the opposite direction. The stirring rods 48 on the stirring shaft 47 stir the wastewater in the treatment cylinder 2. At the same time, the treatment cylinder 2 rotates in the opposite direction to the stirring shaft 47, further increasing the turbulence effect.

[0048] At the same time, when the upper driven bevel gear 44 rotates, the small bevel gear 51 meshing with it drives the rotating rod 52 to rotate. The rotating rod 52 makes the reciprocating lead screw 34 rotate through the transmission structure 53. When the reciprocating lead screw 34 rotates, the slider 35 threadedly connected to it reciprocates in the pretreatment box 31. During the movement of the wedge-shaped blocks 36 at both ends of the slider 35, the push rod 39 is pushed, causing the baffle 37 to move to both sides against the elastic force of the limit spring 38, opening the slag discharge port and discharging the impurities on the filter screen 33, realizing the pretreatment process and reducing the subsequent treatment pressure on the wastewater.

[0049] As the wastewater in the treatment cylinder 2 continuously increases and the water level rises, the buoyancy ring 63 rises under the action of buoyancy. The buoyancy ring 63 rises smoothly along the guide rod 64 in the lifting groove 61 through the lifting block 62. The rotating block 67 rotates in the annular groove 66, causing the cylinder and the lifting rod 65 to rotate relative to each other, avoiding the rotation of the lifting rod 65 following the buoyancy ring 63 and affecting the rotation. The lifting rod 65 drives the active tooth plate 68 to rise. The active tooth plate 68 meshes with the large gear 611. Since the size of the large gear 611 is twice that of the small gear 612, the rotation of the large gear 611 drives the coaxial small gear 612 to rotate. The small gear 612 meshes with the driven tooth plate 610, so that the driven tooth plate 610 slides along the inner side wall of the equipment box 69. The driven tooth plate 610 drives the pressing plate to descend through the connecting block 614. In the design dimensions of this device, taking the addition amounts of lime milk and flocculant as 2% and 0.2% of the wastewater as an example, the inner diameter of the lime milk addition cylinder 620 is one twenty-fifth of that 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 milk addition cylinder 620. When the buoyancy ring 63 rises and drives the pressing plate to descend, the pressing plate presses down the first vertical rod 622, causing the first piston plate 621 to move downward in the lime milk addition cylinder 620. According to the above size relationship, 2% of the lime milk accounting for the wastewater is added to the treatment cylinder 2 (since the amount of lime milk is small, the rise of the buoyancy ring 63 caused by the addition of lime milk to the wastewater is ignored). At the same time, the flocculant is squeezed into the accommodating cylinder 6271. The lime milk is used for the neutralization reaction, precipitation reaction, removal of acidic substances and softening of water quality in wastewater treatment.

[0050] At this time, the zero-speed switch on the active tooth plate 68 detects that the active tooth plate 68 stops rising (that is, the water level in the treatment cylinder 2 no longer rises). The zero-speed switch transmits a signal to the controller, and the controller controls the delay switch. The delay time of the delay switch is fifteen minutes. During these fifteen minutes, the stirring assembly 4 continuously stirs and mixes the wastewater with the added lime milk, enabling the lime milk 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 accommodating cylinder 6271 of the tilter 627 through the water pipe 628. When the accommodating cylinder 6271 is filled with liquid, it flips under the action of the gravity of the water. Due to the relationship between the inner diameter of the flocculant addition cylinder 623 and the inner diameter of the lime milk addition cylinder 620, exactly 0.2% of the flocculant accounting for the wastewater can be added to the treatment cylinder 2, completing the addition process of the flocculant and ensuring the correct order of adding lime milk first and then flocculant.

[0051] During the entire wastewater treatment process, the stirring assembly 4 continuously stirs the wastewater, enabling the lime milk, flocculant and wastewater to fully mix and react, improving the treatment effect. After the treatment is completed, the clear water in the treatment cylinder 2 can be discharged from the outlet at the lower end, realizing the purification treatment of the wastewater.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements 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 in a hydrogen peroxide production process, characterized in that, It includes a support component (1). A pretreatment component (3) is arranged at the upper end of the support component (1). A treatment cylinder (2) is arranged below the pretreatment component (3). A stirring component (4) is arranged inside the treatment cylinder (2). An automatic addition component (6) for adding lime milk and flocculant into the treatment cylinder (2) is also arranged at the upper end of the support component (1): The automatic addition component (6) includes a buoyancy ring (63) arranged to move up and down inside the treatment cylinder (2). Two lifting rods (65) are arranged at the upper end of the buoyancy ring (63). The upper ends of the two lifting rods (65) are fixedly connected together with a driving tooth plate (68). A device box (69) is arranged outside the driving tooth plate (68). A large gear (611) meshing with the driving tooth plate (68) is rotatably arranged on the inner side wall of the device box (69). The large gear (611) is coaxially and fixedly connected with a small gear (612). A driven tooth plate (610) meshing with the small gear (612) is slidably arranged on the inner side wall of the device box (69). One end of the driven tooth plate (610) close to the pretreatment component (3) is fixedly connected with a pressing plate. A lime milk addition structure and a flocculant addition structure are arranged below the pressing plate.

2. The wastewater treatment device in a hydrogen peroxide production process according to claim 1, characterized in that, The support component (1) includes a support plate (11). Two cushion blocks (12) are symmetrically and fixedly connected to the lower end of the support plate (11). A rotation groove (13) that is wider at the top and narrower at the bottom is opened at the upper end of the support plate (11). The treatment cylinder (2) is rotationally connected with the rotation groove (13). A plurality of support rods (14) are fixedly connected to the upper end of the support plate (11). The upper ends of the plurality of support rods (14) are fixedly connected together with a top plate (15).

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

4. The wastewater treatment device in a hydrogen peroxide production process according to claim 3, characterized in that, Two slag discharge ports are symmetrically opened at both ends of the pretreatment box (31). A sliding cavity is opened above the slag discharge port inside the pretreatment box (31). A baffle (37) is slidably connected to the sliding cavity. A plurality of limiting springs (38) are fixedly connected between the baffle (37) and the sliding cavity. Two wedge-shaped blocks (36) that are in sliding connection with and attached to the inner bottom wall of the pretreatment box (31) are symmetrically and fixedly connected to both ends of the slider (35). A resisting rod (39) corresponding to the position of the wedge-shaped block (36) is fixedly connected to the opposite end of each of the two baffles (37).

5. The wastewater treatment device in a hydrogen peroxide production process according to claim 2, characterized in that, The stirring assembly (4) includes an installation box (42) provided at the lower end of the support plate (11). A plurality of connecting rods (41) are fixedly connected between the installation box (42) and the backing plate (12). The inner side wall of the installation box (42) is rotatably connected with a driving bevel gear (43). The outer side of the installation box (42) is fixedly installed with a rotating motor for driving the driving bevel gear (43) to rotate. The inner top wall and the inner bottom wall of the installation box (42) are respectively rotatably installed with an upper driven bevel gear (44) and a lower driven bevel gear (45) that mesh with the driving bevel gear (43). A connecting cylinder (46) is fixedly connected between the upper driven bevel gear (44) and the treatment cylinder (2). The upper end of the lower driven bevel gear (45) is fixedly connected with a stirring shaft (47). 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). A plurality of stirring rods (48) are fixedly connected to the shaft body of the stirring shaft (47) inside the treatment cylinder (2).

6. The wastewater treatment device in a hydrogen peroxide production process according to claim 5, characterized in that, It further includes a linkage assembly (5). The linkage assembly (5) includes a small bevel gear (51) that meshes with the upper driven bevel gear (44) inside the installation box (42). One end of the small bevel gear (51) away from the rotating motor is coaxially and fixedly connected with a rotating rod (52). A transmission structure (53) is provided between the rotating rod (52) and the reciprocating lead screw (34).

7. The wastewater treatment device in a hydrogen peroxide production process according to claim 1, characterized in that, Two lifting grooves (61) are symmetrically formed in the inner side wall of the treatment cylinder (2). The lifting grooves (61) are slidably connected with lifting blocks (62). The buoyancy ring (63) is fixedly connected with the lifting blocks (62). A guide rod (64) for guiding the lifting blocks (62) is fixedly connected inside the lifting grooves (61). An annular groove (66) is formed at the upper end of the buoyancy ring (63). The annular groove (66) is connected with a rotating block (67) in a limited sliding manner. Two lifting rods (65) are fixedly connected to the upper end of the rotating block (67).

8. The wastewater treatment device in a hydrogen peroxide production process according to claim 7, characterized in that, One end of the equipment box (69) close to the processing cylinder (2) is provided with a movable groove (613). One end of the driven toothed plate (610) close to the processing cylinder (2) is fixedly connected with a connecting block (614) passing through the movable groove (613). The connecting block (614) is fixedly connected with a pressing plate. The pressing plate includes a fixing plate (615) fixedly connected with the connecting block (614). The fixing plate (615) is provided with a sliding groove. The sliding groove is slidably connected with a telescopic plate (616). A plurality of reset springs (617) are fixedly connected between the telescopic plate (616) and the sliding groove. One side of the telescopic plate (616) is fixedly connected with a cross plate (618). 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 with a lime milk adding cylinder (620) and a flocculant adding cylinder (623) at intervals. The lime milk adding cylinder (620) and the flocculant adding cylinder (623) are respectively slidably connected with a first piston plate (621) and a second piston plate (624). The upper ends of the first piston plate (621) and the second piston plate (624) are respectively fixedly connected with a first vertical rod (622) and a second vertical rod (625). The first vertical rod (622) and the second vertical rod (625) are both located directly below the pressing plate. A blanking cylinder (626) is arranged directly below the flocculant adding cylinder (623), and the lower end of the blanking cylinder (626) is communicated with the processing cylinder (2). An inclining device (627) is arranged in the blanking cylinder (626).

9. The wastewater treatment device in a hydrogen peroxide production process according to claim 8, characterized in that, The inclining device (627) includes a receiving cylinder (6271) suspended in the blanking cylinder (626). Connecting chains (6272) are fixedly connected between the outer walls on both sides of the receiving cylinder (6271) and the inner wall of the receiving cylinder (6271). A water pipe (628) is arranged 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 driving toothed plate (68). The zero-speed switch is electrically connected to a controller. The water pump is electrically connected to a delay switch. The controller is in signal connection with the delay switch.

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