A papermaking wastewater decoloring treatment device

Abstract

The application discloses a papermaking wastewater decoloring treatment device and relates to the technical field of papermaking wastewater decoloring treatment.The device comprises a treatment box, the middle part of the inside of the treatment box is a sedimentation cavity, one side of the inside of the treatment box is a flocculation cavity, the other side of the inside of the treatment box is a clean water cavity, a flow splitting mechanism is arranged in the upper part of the flocculation cavity, stirring mechanisms are arranged at the front end and the rear end of the inside of the flocculation cavity, a transmission mechanism is arranged in a protective cover, a liquid stirring assembly is arranged in the upper part of the sedimentation cavity, and a purification assembly is arranged at the inner end of a water outlet pipe.The device has a multistage treatment synergistic effect, the reasonable layout of the flocculation cavity, the sedimentation cavity and the clean water cavity realizes a multistage process of wastewater treatment, the flow splitting mechanism and the stirring mechanisms cooperate in the flocculation cavity, the sewage is fully mixed with a coagulant and a decoloring agent, and the impurity flocculation rate is accelerated, organic dye molecules are oxidized and decomposed and adsorbed and degraded, the decoloring efficiency is greatly improved, and the treated water body can reach a high purification standard.

Description

Technical Field

[0001] This invention relates to the field of papermaking wastewater decolorization treatment technology, and more particularly to a papermaking wastewater decolorization treatment device. Background Technology

[0002] The paper industry is an important basic raw material industry in my country; however, the paper production process generates a large amount of wastewater, which contains a large amount of suspended solids, colloidal substances, organic dyes and various chemical pollutants.

[0003] Currently, existing wastewater treatment equipment for paper mills faces numerous technical bottlenecks and problems, failing to meet the demands for efficient, stable, and environmentally friendly wastewater treatment. Existing equipment often lacks multi-stage treatment synergy mechanisms, hindering comprehensive and in-depth treatment of impurities and pollutants in wastewater. In the flocculation stage, insufficient mixing of wastewater with coagulants and decolorizing agents results in slow flocculation and aggregation of impurities, making it difficult to quickly and effectively remove suspended solids and colloidal substances. During sedimentation, water is easily disturbed, leading to poor sedimentation results, with some sediments resuspending in the water, reducing sedimentation and separation efficiency. Regarding decolorization, single treatment methods cannot address the issue from multiple perspectives. The treatment of organic dye molecules results in low decolorization efficiency, making it difficult to achieve high purification standards for the treated water. Furthermore, the unreasonable connection design between chambers leads to disordered wastewater flow, hindering continuous and stable treatment. Defects in the inlet and flow guiding structure prevent smooth water flow and lack effective impurity interception and cleaning measures, causing filter plate clogging, process interruptions, frequent equipment failures, and poor practicality and reliability. In addition, traditional diversion methods result in uneven wastewater dispersion and low mixing efficiency between chemicals and wastewater, severely impacting flocculation and decolorization effects, thus affecting the overall quality and efficiency of wastewater treatment. Therefore, improvements are needed to address these technical problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a decolorization treatment device for papermaking wastewater.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a papermaking wastewater decolorization treatment device, comprising a treatment tank, an inlet pipe located on the upper part of one side of the treatment tank, and an outlet pipe located on the upper part of the other side of the treatment tank. The treatment tank has a sedimentation chamber in the middle, a flocculation chamber on one side, and a clear water chamber on the other side. First water inlets are provided at both the front and rear ends between the upper parts of the flocculation chamber and the sedimentation chamber, and second water inlets are provided at both the front and rear ends between the upper parts of the sedimentation chamber and the clear water chamber. A protective cover is installed on one side of the top of the treatment tank, and a through-hole is provided on one side of the top of the protective cover. The flocculation chamber contains a chemical addition hopper, and a flocculation tank is installed inside the flocculation chamber. A clumping pool is connected to the bottom of the flocculation tank, and a sedimentation tank is installed at the bottom of the sedimentation chamber. A collection hopper for concentrating and guiding impurities inside the sedimentation chamber is connected to the top of the sedimentation tank. A diversion mechanism is installed in the upper part of the flocculation tank. A stirring mechanism is installed at both the front and rear ends of the flocculation tank. A transmission mechanism for synchronously driving the diversion mechanism and the stirring mechanism is provided inside the protective cover. A liquid-dispersing assembly is installed in the upper part of the sedimentation chamber, and a purification assembly is installed at the inner end of the outlet pipe.

[0006] Preferably, inspection ports are provided at the top of the sedimentation chamber and inside the clear water chamber, and maintenance covers are installed inside the inspection ports. The inlet pipe is connected to the inside of the flocculation chamber, and the outlet pipe is connected to the inside of the clear water chamber. The rear ends of the agglomeration tank and the sedimentation tank are both equipped with sewage pipes that extend out of the treatment box. Multiple anti-disruption plates are horizontally installed inside the sedimentation chamber above the collection hopper, and the impurities of the multiple anti-disruption plates pass through the holes in an S-shaped slag discharge channel.

[0007] Preferably, a first filter plate is installed in each first water inlet, and a second filter plate is installed in each second water inlet; a composite decolorizing mechanism is installed in the lower part of the clear water chamber, and a guide pipe is vertically installed through the front and rear ends on the top side of the composite decolorizing mechanism, and the top opening of the guide pipe is bent and sealed to the second water inlet, and the outlet at the bottom of the guide pipe is separated from the inner bottom surface of the clear water chamber by a drainage space.

[0008] Preferably, the diversion mechanism includes a deflection pipe that is laterally rotatably disposed in the upper part of the flocculation box, three water distribution flat pipes connected to the bottom of the deflection pipe, and an external toothed ring fixedly sleeved on one end of the outer wall of the deflection pipe. A transmission gear that meshes with the external toothed ring is rotatably disposed on the upper part of the inner wall of one side of the flocculation box. A plug pipe is installed at the inlet of the deflection pipe, and the plug pipe is rotatably inserted into the inlet pipe. The other end of the deflection pipe is closed, and a rotating shaft that is rotatably connected to the inner wall of the flocculation box is laterally fixed in the middle of the other end of the deflection pipe.

[0009] Preferably, the stirring mechanism includes a stirring shaft vertically arranged at the front and rear ends inside the flocculation box, multiple mounting pipes fixedly sleeved at the lower part of the stirring shaft, and stirring frames equidistantly fixed to the outer periphery of the mounting pipes. The top end of the stirring shaft is rotatably connected to the inner top surface of the treatment box. Multiple pairs of cutting strips for cutting large-volume impurities are installed in the inner frame of the stirring frame. The outer ends of two of the symmetrically arranged stirring frames on the periphery of the mounting pipes are bent downwards.

[0010] Preferably, the transmission mechanism includes a movable frame that slides horizontally inside the protective cover, slide rails installed on both sides of the bottom of the movable frame, a sealing plate installed on one side of the bottom of the movable frame, and a rack fixed on the other side of the movable frame. The slide rails are fixed to the top of the processing box. The top end of the stirring shaft moves through the inside of the protective cover and is fixedly sleeved with a cooperating gear that meshes with the rack. A rectangular slot is opened on the top of the processing box below the bottom side of the movable frame, and a rack seat is fixedly connected to the bottom side of the movable frame. The bottom end of the rack seat extends from the rectangular slot into the interior of the flocculation box and meshes with the transmission gear. A fixing plate is vertically fixed to the top surface of the processing box, and the fixing plate is located on the rear side of the inner frame of the movable frame. An electric push rod is longitudinally installed on the front end face of the fixing plate, and the front part of the telescopic end of the electric push rod is fixedly connected to the front inner wall of the movable frame.

[0011] Preferably, the liquid-dissolving assembly includes a connecting shaft that is laterally rotatable in the upper part of the sedimentation chamber, a fixed tube fixedly sleeved at one end of the connecting shaft, a scraper plate fixedly connected to the front and rear ends of the fixed tube, and a mounting base fixedly connected to the other end of the connecting shaft. One end of the connecting shaft movably penetrates into the interior of the flocculation box and is coaxially fixedly connected to the rotating shaft at the other end of the deflection tube. The front and rear ends of the mounting base are equipped with scrapers for cleaning the second filter plate. The scraper plate is arc-shaped and the inner arc surfaces are arranged in opposite directions. A cleaning brush for preventing the first filter plate from clogging is installed on one side of the scraper plate, and the bristles of the cleaning brush extend into the filter holes of the first filter plate when deflected to clean out the flocs clogging the filter holes.

[0012] Preferably, the purification assembly includes an inner filter cartridge installed at the inner end of the water outlet pipe and a purification filter element installed inside the inner filter cartridge. The inner end of the inner filter cartridge is closed, and multiple water inlets are equidistantly opened at the bottom of the inner filter cartridge. The other end of the connecting shaft movably passes through the clean water chamber and is fixedly connected to a connecting plate. A pair of cleaning strips for cleaning the water inlets are fixedly connected to the outer end of one side of the connecting plate. Both scraping surfaces of the cleaning strips are beveled, and the inner arc surface of the cleaning strips is in close contact with the outer wall of the inner filter cartridge.

[0013] Preferably, the composite decolorization mechanism consists of a photocatalytic oxidation module, a biological activated carbon adsorption module disposed below the photocatalytic oxidation module, and an electrochemical oxidation module disposed below the biological activated carbon adsorption module. The photocatalytic oxidation module adopts a mesh frame structure and is filled with porous ceramic filler loaded with titanium dioxide photocatalyst. A UV-Vis composite light source is installed on one side of the guide pipe above the photocatalytic oxidation module. The biological activated carbon adsorption module is located below the photocatalytic oxidation module and adopts a fixed bed form. The activated carbon has undergone special microbial domestication treatment, and its surface is covered with a rich microbial community. The electrochemical oxidation module consists of a purification frame and two parallel electrode plates disposed within the purification frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention features a multi-stage synergistic treatment effect. The device achieves a multi-stage wastewater treatment process through the rational layout of the flocculation chamber, sedimentation chamber, and clear water chamber. Within the flocculation chamber, the diversion and stirring mechanisms work together to ensure thorough mixing of wastewater with coagulants and decolorizing agents, accelerating the flocculation and agglomeration rate of impurities. In the sedimentation chamber, anti-disturbance plates prevent water disturbance and ensure effective sedimentation. The composite decolorization mechanism in the clear water chamber consists of a photocatalytic oxidation module, a biological activated carbon adsorption module, and an electrochemical oxidation module, providing deep treatment of wastewater from different angles. The synergistic effect of these three modules oxidizes, decomposes, and adsorbs organic dye molecules, greatly improving decolorization efficiency and enabling the treated water to reach a high purification standard.

[0016] 2. This invention features continuous treatment and stable operation: Each chamber is connected via specific inlets and flow guiding structures, allowing wastewater to flow in an orderly manner for continuous treatment; filter plates are installed at the first and second inlets to ensure smooth water flow while intercepting impurities, and the liquid-dispersing component cleans the filter plates to prevent clogging, ensuring stable operation of the entire treatment process and improving the practicality and reliability of the device; the deflection pipe and water-distributing flat pipe design in the diversion mechanism enable the water to be diverted in an oscillating manner within the flocculation tank, which, compared to the traditional fixed diversion method, can more evenly disperse wastewater into the mixing area. Combined with the thorough agitation of the wastewater by the mixing mechanism, this significantly improves the mixing efficiency of the reagents and wastewater, ensuring flocculation and decolorization effects; through the cooperation of components such as scraper plates, scraper rods, and cleaning strips, the filter plates and inlet strips are automatically cleaned during device operation, eliminating the need for frequent manual maintenance, reducing labor intensity, improving the automation level and operating efficiency of the equipment, and reducing equipment failures and downtime caused by clogging;

[0017] 3. This invention, through the design of a composite decolorization mechanism, utilizes a biological activated carbon adsorption module to degrade organic pollutants via microbial metabolism, achieving a synergistic effect of physical adsorption and biodegradation, thus reducing the amount of chemical reagents used. The electrochemical oxidation module employs novel iridium-tantalum-titanium multi-alloy electrode plates, which possess excellent conductivity and corrosion resistance, reducing electrode wear, extending equipment lifespan, and saving resources and costs. The transmission mechanism in this invention uses an electric actuator to drive a moving frame, achieving synchronous drive of the diversion mechanism and the stirring mechanism. This design cleverly utilizes a single power source to perform multiple functions, avoiding energy waste caused by multiple independent drive devices, and maximizing energy efficiency. This device utilizes resources rationally, aligning with the principles of energy conservation and environmental protection. Furthermore, its adjustable diversion, stirring, and multi-stage treatment methods allow it to adapt to the treatment needs of papermaking wastewater with varying concentrations and compositions. Whether the wastewater contains numerous large-volume impurities or has a high concentration of organic dyes, it can be effectively purified through appropriate treatment processes, expanding the device's application range. Inspection ports and maintenance covers in the sedimentation and clear water chambers facilitate easy inspection and maintenance of the internal structure. The modular design of functional modules, such as the composite decolorization mechanism, allows for easy upgrading or replacement based on actual needs, adapting to increasingly stringent environmental standards and water quality requirements. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a first-view schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a second-view schematic diagram of the overall structure of the present invention;

[0021] Figure 3 This is a third-view schematic diagram of the overall structure of the present invention;

[0022] Figure 4 This is a partial cross-sectional view of the front end of the processing box of the present invention;

[0023] Figure 5 This is a first-view structural diagram of the internal structure of the processing box of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the processing box of the present invention from a second perspective.

[0025] Figure 7 This is a schematic diagram of the rear end structure of the processing box of the present invention;

[0026] Figure 8This is a schematic diagram of the flocculation box, agglomeration tank, and sedimentation tank of the present invention;

[0027] Figure 9 This is a schematic diagram showing the positional relationship between the transmission mechanism and the processing box of the present invention;

[0028] Figure 10 This is a schematic diagram showing the positional relationship between the stirring mechanism and the transmission mechanism of the present invention;

[0029] Figure 11 This is a schematic diagram showing the positional relationship between the diversion mechanism and the transmission mechanism of the present invention;

[0030] Figure 12 This is a rear-view three-dimensional structural diagram of the diversion mechanism and transmission mechanism of the present invention.

[0031] Figure 13 This is a schematic diagram of the deflection tube, deflection shaft, and inner filter cylinder structure of the present invention;

[0032] Figure 14 This is a schematic diagram showing the positional relationship between the scraper and the transmission mechanism of the present invention;

[0033] Figure 15 This is a schematic diagram of the lower water inlet of the inner filter cartridge of the present invention;

[0034] Figure 16 This is a schematic diagram of the connecting plate, cleaning strip, and connecting shaft structure of the present invention.

[0035] The following are the components listed in the diagram: 1. Treatment tank; 2. Inlet pipe; 3. Outlet pipe; 4. Protective cover; 5. Chemical addition hopper; 6. Inspection cover; 7. Flocculation tank; 8. Agglomeration tank; 9. Sedimentation tank; 10. Collection hopper; 11. Anti-disruption plate; 12. Composite decolorization mechanism; 13. First filter plate; 14. Second filter plate; 15. Guide pipe; 16. Moving frame; 17. Fixed plate; 18. Electric actuator; 19. Stirring shaft. ; 20. Mixing frame; 21. Cutting strip; 22. Concerting gear; 23. Rack; 24. Deflection tube; 25. External gear ring; 26. Transmission gear; 27. Rack seat; 28. Connecting shaft; 29. ​​Scraper; 30. Scraper rod; 31. Inner filter cartridge; 32. Connecting plate; 33. Cleaning strip; 34. Water inlet; 35. Water distribution flat pipe; 36. Sewage pipe; 37. Ultraviolet-visible composite light source. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Example 1: See Figures 1 to 16A papermaking wastewater decolorization treatment device includes a treatment tank 1, an inlet pipe 2 located on the upper part of one side of the treatment tank 1, and an outlet pipe 3 located on the upper part of the other side of the treatment tank 1. The treatment tank 1 has a sedimentation chamber in the middle, a flocculation chamber on one side, and a clear water chamber on the other side. First water inlets are provided at both the front and rear ends between the upper parts of the flocculation chamber and the sedimentation chamber, and second water inlets are provided at both the front and rear ends between the upper parts of the sedimentation chamber and the clear water chamber. A protective cover 4 is installed on one side of the top of the treatment tank 1, and a reagent addition hopper 5 penetrating into the interior of the treatment tank 1 is provided on one side of the top of the protective cover 4. A flocculation box 7 is installed inside the flocculation chamber. A connecting pipe is installed at the bottom of the flocculation box 7. The system includes a flocculation tank 8, a sedimentation tank 9 at the bottom of the sedimentation chamber, and a collection hopper 10 connected to the top of the sedimentation tank 9 for concentrating and guiding impurities within the sedimentation chamber. A diversion mechanism is installed in the upper part of the flocculation box 7, and stirring mechanisms are installed at both the front and rear ends inside the flocculation box 7. A transmission mechanism for synchronously driving the diversion and stirring mechanisms is located inside the protective cover 4. A liquid-dispersing component is installed in the upper part of the sedimentation chamber, and a purification component is installed at the inner end of the outlet pipe 3. By rationally dividing the flocculation chamber, sedimentation chamber, and clear water chamber, and setting corresponding water inlets and functional components, an integrated treatment process for papermaking wastewater from flocculation, sedimentation, to purification is achieved. The clear division of labor among the chambers, along with the placement of water inlets and filter plates, ensures the orderly flow of wastewater and impurity interception at different treatment stages, making the entire treatment process efficient and stable. This effectively removes impurities and dyes from the wastewater, improving the degree of wastewater purification.

[0038] In this invention, inspection ports are provided at the top of the sedimentation chamber and inside the clear water chamber, and inspection covers 6 are installed inside the inspection ports. The inlet pipe 2 connects to the inside of the flocculation chamber, and the outlet pipe 3 connects to the inside of the clear water chamber. The rear ends of the agglomeration tank 8 and the sedimentation tank 9 are both equipped with sewage pipes 36 that penetrate out of the treatment box 1. Multiple anti-interference plates 11 are horizontally installed inside the sedimentation chamber above the collection hopper 10, and the impurities of the multiple anti-interference plates 11 pass through the holes in an S-shaped slag discharge channel. A first filter plate 13 is installed in each first water outlet, and a second filter plate 13 is installed in each second water outlet. Plate 14; A composite decolorization mechanism 12 is installed in the lower part of the clear water chamber. The front and rear ends of the composite decolorization mechanism 12 are vertically connected by guide pipes 15 on one side of the top. The top opening of the guide pipe 15 is bent and sealed to the second water outlet. A drainage space is provided between the outlet at the bottom of the guide pipe 15 and the inner bottom surface of the clear water chamber. The inspection port and maintenance cover 6 facilitate inspection and maintenance of the device, reducing maintenance difficulty and cost. The drain pipe 36 facilitates the timely discharge of impurities from the agglomeration tank 8 and sedimentation tank 9, ensuring the normal operation of the device. The S-shaped slag discharge channel of the anti-disruption plate 11 effectively reduces the disturbance of newly entering water to already settled impurities, improving sedimentation effect. The first filter plate 13 and the second filter plate 14 further intercept impurities, ensuring the smooth progress of subsequent treatment processes. The cooperation between the composite decolorization mechanism 12 and the guide pipe 15 allows wastewater to undergo multiple decolorization treatments sequentially in the clear water chamber, significantly improving decolorization efficiency and quality.

[0039] In this invention, the composite decolorization mechanism 12 comprises a photocatalytic oxidation module, a bio-activated carbon adsorption module disposed below the photocatalytic oxidation module, and an electrochemical oxidation module disposed below the bio-activated carbon adsorption module. The photocatalytic oxidation module adopts a mesh frame structure, specifically: the mesh frame is made of stainless steel mesh (pore size 5mm×5mm), and the interior is filled with porous ceramic filler loaded with titanium dioxide photocatalyst; the porous ceramic filler consists of spheres with a diameter of 10-15mm, and the surface is loaded with a titanium dioxide coating (thickness 5-10μm). The coating is applied through a sol-gel process. The wastewater is prepared using a gel method. A UV-Vis composite light source 37 is installed on one side of the guide pipe 15 above the photocatalytic oxidation module. This source provides light of different wavelengths to excite titanium dioxide to generate highly oxidizing free radicals, which oxidize and decompose organic dye molecules in the wastewater into harmless substances such as carbon dioxide and water. A biological activated carbon adsorption module is located below the photocatalytic oxidation module and is in a fixed-bed configuration. The activated carbon undergoes special microbial domestication treatment, resulting in a rich microbial community growing on its surface. Residual organic pollutants in the wastewater are enriched on the surface of the activated carbon through adsorption, while the microorganisms utilize these organic pollutants as carbon and energy sources. The process promotes growth and metabolism, further degrading organic pollutants and achieving a synergistic effect of physical adsorption and biodegradation to improve decolorization. The electrochemical oxidation module consists of a purification frame and two parallel electrode plates placed inside the frame. The electrode plates are made of a novel iridium-tantalum-titanium multi-element alloy material, which has good conductivity and corrosion resistance. A certain voltage is applied between the electrode plates to form an electric field. Under the action of the electric field, the organic dye molecules in the wastewater undergo oxidation-reduction reactions, and their molecular structure is destroyed, thereby achieving the purpose of decolorization. At the same time, the active substances (such as hydroxyl radicals) generated by the electrode reaction can further oxidize and decompose other pollutants in the wastewater.

[0040] Example 2: The technical solution is basically the same as that of Example 1, except that, as Figures 9 to 14 As shown, the diversion mechanism includes a deflection pipe 24 that is laterally rotatably installed in the upper part of the flocculation box 7, three water distribution flat pipes 35 connected to the bottom of the deflection pipe 24, and an external toothed ring 25 fixedly sleeved on one end of the outer wall of the deflection pipe 24. A transmission gear 26 that meshes with the external toothed ring 25 is rotatably installed on the upper part of the inner wall of one side of the flocculation box 7. A plug pipe is installed at the inlet of the deflection pipe 24, and the plug pipe is rotatably inserted into the inlet pipe 2. The other end of the deflection pipe 24 is closed, and a rotating shaft that is rotatably connected to the inner wall of the flocculation box 7 is laterally fixed in the middle of the other end of the deflection pipe 24.

[0041] In this invention, the stirring mechanism includes a stirring shaft 19 vertically arranged at the front and rear ends inside the flocculation box 7, multiple mounting pipes fixedly sleeved on the lower part of the stirring shaft 19, and stirring frames 20 equidistantly fixed to the outer periphery of the mounting pipes. The top end of the stirring shaft 19 is rotatably connected to the inner top surface of the treatment box 1. Multiple pairs of cutting strips 21 for cutting large-volume impurities are installed in the inner frame of the stirring frame 20. Two of the symmetrically arranged stirring frames 20 on the periphery of the mounting pipes have their outer ends bent downwards. The stirring mechanism drives the stirring frames 20 through the stirring shaft 19 to fully agitate the wastewater, ensuring that the reagent and wastewater are fully mixed, improving the mixing uniformity, and accelerating the coagulation and decolorization reactions. The cutting strip 21 inside the stirring frame 20 can cut large-volume impurities, preventing them from clogging the subsequent first filter plate 13, ensuring the smooth flow of wastewater treatment, reducing the probability of equipment failure, and improving the stability of the device operation; the transmission mechanism includes a moving frame 16 that slides horizontally inside the protective cover 4, slide rails installed on both sides of the bottom of the moving frame 16, a sealing plate installed on one side of the bottom of the moving frame 16, and a rack 23 fixed on the other side of the moving frame 16. The slide rails are fixed to the top of the treatment box 1, and the top end of the stirring shaft 19 moves through the inside of the protective cover 4 and is fixedly sleeved with a cooperating gear 22 that meshes with the rack 23. The treatment tank 1 has a rectangular opening at the top, and a rack seat 27 is fixedly connected to one side of the bottom of the moving frame 16. The bottom end of the rack seat 27 extends from the rectangular opening into the flocculation tank 7 and meshes with the transmission gear 26. A fixing plate 17 is vertically fixed to the top surface of the treatment tank 1, and the fixing plate 17 is located on the rear side of the inner frame of the moving frame 16. An electric push rod 18 is longitudinally mounted on the front end face of the fixing plate 17, and the front part of the telescopic end of the electric push rod 18 is fixed to the front inner wall of the moving frame 16. The transmission mechanism uses the electric push rod 18 to drive the moving frame 16 to move. Through the meshing of the rack 23 with the cooperating gear 22 and the transmission gear 26, the flow diversion mechanism and the stirring mechanism are synchronously driven. This design reduces additional driving components, simplifies the device structure, and reduces equipment cost and energy consumption. At the same time, synchronous drive ensures the coordination of flow diversion and stirring operations, so that wastewater is treated more rationally in the flocculation tank 7, improving treatment effect and efficiency.

[0042] Example 3: The technical solution is basically the same as that of Example 1, except that, as Figures 8 to 10 , Figures 13 to 15As shown, the liquid-dissolving assembly includes a connecting shaft 28 that is laterally rotatable in the upper part of the sedimentation chamber, a fixed tube fixedly sleeved at one end of the connecting shaft 28, a scraper plate 29 fixedly connected to the front and rear ends of the fixed tube, and a mounting base fixedly connected to the other end of the connecting shaft 28. One end of the connecting shaft 28 movably penetrates into the interior of the flocculation box 7 and is coaxially fixedly connected to the rotating shaft at the other end of the deflection tube 24. The front and rear ends of the mounting base are equipped with scraper rods 30 for cleaning the second filter plate 14. The scraper plate 29 is arc-shaped, and the inner arc surfaces are arranged in opposite directions. One side of the scraper plate 29 is equipped with a device for preventing the first filter plate 13 from clogging. The cleaning brush has bristles that extend into the filter holes of the first filter plate 13 when it deflects, removing the flocculation clogged in the filter holes. The liquid diversion component is linked with the diversion mechanism, and when the deflection tube 24 rotates, it drives the connecting shaft 28 and related components to move. The scraper 29 and the cleaning brush can clean the flocculation on the first filter plate 13 in time, and the scraper 30 can clean the second filter plate 14. This effectively prevents the first and second water outlets from being blocked by impurities, thus ensuring the continuity and efficiency of the wastewater treatment process and reducing the frequency and workload of manual cleaning.

[0043] In this invention, the purification assembly includes an inner filter cylinder 31 installed at the inner end of the outlet pipe 3 and a purification filter element installed inside the inner filter cylinder 31. The inner end of the inner filter cylinder 31 is closed, and multiple water inlets 34 are equidistantly opened at the bottom of the inner filter cylinder 31. The other end of the connecting shaft 28 movably passes through the clean water chamber and is fixedly connected to a connecting plate 32. A pair of cleaning strips 33 for cleaning the water inlets 34 are fixedly connected to the outer end of one side of the connecting plate 32. Both scraping surfaces of the cleaning strips 33 are beveled, and the inner arc surface of the cleaning strips 33 is in close contact with the outer wall of the inner filter cylinder 31. The inner filter cylinder 31 and the purification filter element of the purification assembly perform final purification and filtration on the wastewater after treatment by the composite decolorization mechanism 12, further removing residual micro-impurities and pollutants to ensure that the discharged water quality meets higher standards. The cleaning strips 33 are linked with the connecting shaft 28 to clean the water inlets 34 in a timely manner, preventing them from being blocked by impurities, ensuring that the purified wastewater is discharged smoothly, and improving the overall purification effect and operational stability of the device.

[0044] Working principle: In this embodiment, the present invention also proposes a method for using a papermaking wastewater decolorization treatment device, including the following steps:

[0045] Step 1: First, connect the inlet pipe 2, outlet pipe 3, and sewage pipe 36 to the external pipes, and electrically connect the electric actuator 18 to the external control equipment. Then, inject the papermaking wastewater to be treated into the flocculation box 7. When injecting wastewater into the flocculation box 7, the electric actuator 18 is activated to drive the moving frame 16 to move back and forth. The moving frame 16 moves back and forth, which in turn drives the rack seat 27 to move back and forth within the rectangular slot. The rack seat 27 moves back and forth, which in turn drives the transmission gear 26 to rotate. Then, the transmission gear 26 and the external gear ring 25 mesh, which drive the deflection pipe 24 to rotate. When the deflection pipe 24 deflects back and forth, the water distribution flat pipe 35 can perform a swing-type diversion and distribution operation, which makes it easy for the water to be deflected and poured from the deflected water distribution flat pipe 35 toward the stirring shaft 19.

[0046] Step two: Next, coagulant is added into the flocculation box 7 through the agent addition hopper 5, which promotes the flocculation and agglomeration of the sewage inside the flocculation box 7. The reciprocating movement of the moving frame 16 facilitates the reciprocating rotation of the cooperating gear 22 driven by the rack 23. The reciprocating rotation of the cooperating gear 22 drives the stirring shaft 19 to rotate, which in turn drives the stirring frame 20 to fully agitate the sewage inside the flocculation box 7, improving the thorough mixing of sewage and coagulant, increasing the efficiency of mixing coagulant and sewage, and accelerating the flocculation rate of impurities in sewage. Furthermore, the cutting strip 21 on the stirring frame 20 cuts large impurities in the sewage to prevent clogging of the first filter plate 13.

[0047] Step 3: Next, decolorizing agent is added into the flocculation tank 7 through the agent addition hopper 5. The sewage and decolorizing agent are thoroughly mixed by the stirring mechanism. Under the action of the coagulant, suspended solids and colloidal particles settle and separate. The supernatant inside the flocculation tank 7 enters the sedimentation chamber through the first water outlet. After entering the sedimentation chamber, the supernatant enters the sedimentation tank 9. The anti-disturbance plate 11 inside the sedimentation chamber can prevent the newly entering water from disturbing the existing sedimentation impurities in the sedimentation tank 9. After the sewage has settled, the water in the sedimentation chamber enters the guide pipe 15 through the second water outlet. The water entering the guide pipe 15 enters the lower part of the clear water chamber. When the deflection pipe 24 deflects repeatedly, it will drive the connecting shaft 28 to deflect back and forth. The reciprocating deflection of the connecting shaft 28 will drive the scraper 29 to clean the lint on the first filter plate 13 and will also drive the scraper 30 to clean the second filter plate 14, preventing the first and second water outlets from becoming blocked.

[0048] Step four: When the water entering the clear water chamber passes through the electrochemical oxidation module, a certain voltage is applied between the two electrode plates to form an electric field. Under the action of the electric field, the organic dye molecules in the wastewater undergo an oxidation-reduction reaction, and their molecular structure is destroyed, thereby achieving the purpose of decolorization. At the same time, the active substances (such as hydroxyl radicals) generated by the electrode reaction can further oxidize and decompose other pollutants in the wastewater. When the water in the clear water chamber rises and passes through the biological activated carbon adsorption module, the residual organic pollutants in the water are enriched on the surface of the activated carbon under the adsorption of the activated carbon. At the same time, microorganisms use these organic pollutants as carbon sources and energy sources for growth and metabolism, further degrading the organic pollutants and achieving the synergistic effect of physical adsorption and biodegradation. As the water level continues to rise, when the water passes through the photocatalytic oxidation module, the ultraviolet-visible composite light source 37 can provide light of different wavelengths to excite titanium dioxide to generate highly oxidizing free radicals, which oxidize and decompose the organic dye molecules in the wastewater into harmless substances such as carbon dioxide and water, thereby improving the decolorization effect on the water.

[0049] Step 5: Next, the fully purified water will enter the inner filter cartridge 31 through the inlet 34, and then undergo final purification and decolorization treatment through the purification filter element inside the inner filter cartridge 31. Finally, the water will be discharged from the outlet pipe 3.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A papermaking wastewater decolorization treatment device, comprising a treatment tank (1), an inlet pipe (2) located on the upper part of one side of the treatment tank (1), and an outlet pipe (3) located on the upper part of the other side of the treatment tank (1), characterized in that: The treatment tank (1) has a sedimentation chamber in the middle, a flocculation chamber on one side, and a clear water chamber on the other side. The front and rear ends of the flocculation chamber and the sedimentation chamber are provided with first water inlets, and the front and rear ends of the sedimentation chamber and the clear water chamber are provided with second water inlets. A protective cover (4) is installed on one side of the top of the treatment tank (1). A reagent addition hopper (5) that penetrates into the interior of the treatment tank (1) is provided on one side of the top of the protective cover (4). A flocculation box (7) is installed inside the flocculation chamber. The bottom of the flocculation box (7) is connected to a clumping tank (8), the bottom of the sedimentation chamber is connected to a sedimentation tank (9), and the top of the sedimentation tank (9) is connected to a collection hopper (10) for concentrating and guiding impurities inside the sedimentation chamber. The upper part of the flocculation box (7) is connected to a diversion mechanism. The front and rear ends of the flocculation box (7) are both connected to a stirring mechanism. The protective cover (4) is equipped with a transmission mechanism for synchronously driving the diversion mechanism and the stirring mechanism. The upper part of the sedimentation chamber is connected to a liquid-dispersing component. The inner end of the water outlet pipe (3) is connected to a purification component. Each first water inlet is equipped with a first filter plate (13), and each second water inlet is equipped with a second filter plate (14); a composite decolorizing mechanism (12) is installed in the lower part of the clear water chamber. The front and rear ends of the top side of the composite decolorizing mechanism (12) are vertically connected with guide pipes (15), and the top opening of the guide pipe (15) is bent and sealed to the second water inlet. The outlet at the bottom of the guide pipe (15) is separated from the inner bottom surface of the clear water chamber by a drainage space. The diversion mechanism includes a deflection pipe (24) that is laterally rotatably installed in the upper part of the flocculation box (7), three water distribution flat pipes (35) connected to the bottom of the deflection pipe (24), and an external toothed ring (25) fixedly sleeved on one end of the outer wall of the deflection pipe (24). A transmission gear (26) that meshes with the external toothed ring (25) is rotatably installed on the upper part of the inner wall of one side of the flocculation box (7). A plug pipe is installed at the inlet of the deflection pipe (24), and the plug pipe is rotatably inserted into the inlet pipe (2). The other end of the deflection pipe (24) is closed, and a rotating shaft that is rotatably connected to the inner wall of the flocculation box (7) is laterally fixed in the middle of the other end of the deflection pipe (24). The stirring mechanism includes a stirring shaft (19) vertically arranged at the front and rear ends inside the flocculation box (7), multiple mounting pipes fixedly sleeved on the lower part of the stirring shaft (19), and stirring frames (20) equidistantly fixed to the outer wall of the mounting pipes. The top end of the stirring shaft (19) is rotatably connected to the inner top surface of the processing box (1). A pair of cutting strips (21) for cutting large volume impurities are installed in the inner frame of the stirring frame (20). The outer ends of two of the symmetrically arranged stirring frames (20) on the periphery of the mounting pipe are bent downwards. The liquid-dispelling assembly includes a connecting shaft (28) that is laterally rotatable in the upper part of the sedimentation chamber, a fixed tube that is fixedly sleeved on one end of the connecting shaft (28), a scraper plate (29) fixedly connected to the front and rear ends of the fixed tube, and a mounting seat fixedly connected to the other end of the connecting shaft (28). One end of the connecting shaft (28) is movably inserted into the flocculation box (7) and coaxially fixedly connected to the rotating shaft at the other end of the deflection tube (24). The front and rear ends of the mounting seat are equipped with scraper rods (30) for cleaning the second filter plate (14). The scraper plate (29) is an arc-shaped plate with the inner arc surfaces facing opposite directions. A cleaning brush for preventing the first filter plate (13) from clogging is installed on one side of the scraper plate (29). When the brush is deflected, the bristles of the cleaning brush extend into the filter holes of the first filter plate (13) to clean out the flocs clogging the filter holes.

2. The papermaking wastewater decolorization treatment device according to claim 1, characterized in that: Inspection ports are provided at the top of the sedimentation chamber and inside the clear water chamber. Inspection cover plates (6) are installed inside the inspection ports. The inlet pipe (2) is connected to the inside of the flocculation chamber, and the outlet pipe (3) is connected to the inside of the clear water chamber. The rear ends of the agglomeration tank (8) and the sedimentation tank (9) are equipped with sewage pipes (36) that penetrate out of the treatment box (1). Multiple anti-interference plates (11) are horizontally installed inside the sedimentation chamber above the collection hopper (10), and the impurities of the multiple anti-interference plates (11) pass through the holes in the S-shaped slag discharge channel.

3. The papermaking wastewater decolorization treatment device according to claim 1, characterized in that: The transmission mechanism includes a moving frame (16) that slides horizontally inside the protective cover (4), slide rails installed on both sides of the bottom of the moving frame (16), a sealing plate installed on one side of the bottom of the moving frame (16), and a rack (23) fixed on the other side of the moving frame (16). The top end of the stirring shaft (19) moves through the inside of the protective cover (4) and is fixedly fitted with a cooperating gear (22) that meshes with the rack (23). A rectangular strip is provided on the top of the processing box (1) below the bottom side of the moving frame (16). The bottom side of the movable frame (16) is fixedly connected to a rack seat (27), the bottom end of which extends from the rectangular opening into the flocculation box (7) and meshes with the transmission gear (26) for transmission; a fixing plate (17) is vertically fixed to the top surface of the treatment box (1), and the fixing plate (17) is located on the rear side of the inner frame of the movable frame (16). An electric push rod (18) is longitudinally installed on the front end face of the fixing plate (17), and the front part of the telescopic end of the electric push rod (18) is fixedly connected to the front inner wall of the movable frame (16).

4. The papermaking wastewater decolorization treatment device according to claim 3, characterized in that: The purification assembly includes an inner filter cylinder (31) installed at the inner end of the water outlet pipe (3) and a purification filter element installed inside the inner filter cylinder (31). The inner end of the inner filter cylinder (31) is closed. Multiple water inlets (34) are equidistantly opened at the bottom of the inner filter cylinder (31). The other end of the connecting shaft (28) moves through the clean water chamber and is fixedly connected to a connecting plate (32). A pair of cleaning plates (33) for cleaning the water inlets (34) are fixedly connected to the outer end of one side of the connecting plate (32).

5. The papermaking wastewater decolorization treatment device according to claim 4, characterized in that: Both scraping surfaces of the cleaning strip (33) are beveled, and the inner arc surface of the cleaning strip (33) is in contact with the outer wall of the inner filter cylinder (31).

6. The papermaking wastewater decolorization treatment device according to claim 2, characterized in that: The composite decolorization mechanism (12) consists of a photocatalytic oxidation module, a biological activated carbon adsorption module located below the photocatalytic oxidation module, and an electrochemical oxidation module located below the biological activated carbon adsorption module. The photocatalytic oxidation module adopts a mesh frame structure and is filled with porous ceramic filler loaded with titanium dioxide photocatalyst. A UV-Vis composite light source (37) is installed on one side of the guide pipe (15) above the photocatalytic oxidation module. The biological activated carbon adsorption module is located below the photocatalytic oxidation module and adopts a fixed bed form. The electrochemical oxidation module consists of a purification frame and two parallel electrode plates located inside the purification frame.

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