A sewage treatment device for pulp and paper making

Abstract

The present application relates to the technical field of wastewater treatment for pulp and papermaking, and specifically discloses a wastewater treatment device for pulp and papermaking, which includes an inner tank and an outer tank. A water injection pipe is provided at one end of the outer tank, the water injection pipe passes through the outer tank and the inner tank in sequence, and the water injection pipe is connected to the inner tank; a kinetic energy component includes a rotating shaft, a turbofan, and a generator. The rotating shaft is rotatably arranged on the inner tank, the turbofan is fixed on the rotating shaft, and the generator is fixed on the outer tank. The wastewater can drive the turbofan to rotate, thereby causing the generator to generate direct current; an electromagnetic heating component includes a positive coil and a negative coil. The positive coil is spirally wound on the inner tank, and a positive module is provided at the other end of the positive coil, and a negative module is provided at the other end of the negative coil. Both the positive module and the negative module are embedded in the inner tank. The present application has the effect of improving the sewage softening treatment effect, reducing the generation of scale, and reducing production and operating costs.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment for pulp and papermaking, and in particular to a wastewater treatment device for pulp and papermaking. Background Art

[0002] The pulp and paper industry consumes significant amounts of water resources. The papermaking process generates significant amounts of wastewater, which contains large amounts of suspended solids, organic matter, inorganic salts, color, and other pollutants. This wastewater poses a significant environmental threat. To protect the environment and conserve water resources, papermaking wastewater treatment has become a crucial component of the industry. This is particularly true for hardness ions in wastewater, including calcium and magnesium ions. With repeated recycling of wastewater, the concentration of these soluble hardness ions in the wastewater gradually increases, leading to increased water hardness and scaling, which in turn impacts the normal operation of pulp and papermaking wastewater treatment equipment and wastewater reuse.

[0003] Traditional pulp and papermaking wastewater treatment hardness ion technologies mainly include chemical treatment and ion exchange. The chemical treatment method is to add chemical reagents to make the hardness ions in the wastewater react with the chemical reagents, and the hardness ions are removed from the wastewater in the form of precipitates; an ion exchange method is to use ion exchange resins to replace the hardness ions in the water with sodium ions through exchange reactions, thereby reducing the hardness of the water.

[0004] However, in actual applications, due to the inherently uneven distribution of various components in wastewater, the concentration of hardness ions in the wastewater can fluctuate significantly. Some areas may have very high concentrations of hardness ions, while others may have very low concentrations. This can lead to rapid chemical consumption in some areas, while leaving others with either an excess or insufficient supply. In such cases, even after sufficient stirring time, the chemical reaction remains incomplete, making it difficult to maintain a stable treatment effect. This directly impacts the efficiency and quality of wastewater softening, and consequently, the stable operation and economic efficiency of the entire wastewater treatment system. Summary of the Invention

[0005] The present application provides a wastewater treatment device for pulp and papermaking, which can remove hardness ions in the form of sediment without an additional driving source, and the sediment can be automatically dehydrated and discharged, effectively reducing the hardness of the sewage and the complexity of the operation.

[0006] The present application provides a wastewater treatment device for pulp and paper making that adopts the following technical solution:

[0007] A wastewater treatment device for pulp and papermaking, comprising:

[0008] A tank body, comprising an outer tank and an inner tank, wherein a support ring is fixedly provided on the inner tank, and the inner tank is mounted in the outer tank via the support ring. A water injection pipe is provided at one end of the outer tank, and a drainage pipe is provided at the other end of the outer tank. The water injection pipe passes through the outer tank and the inner tank in sequence, and the water injection pipe is in communication with the inner tank. A slag outlet is provided at the end of the inner tank away from the water injection pipe.

[0009] The inner tank is configured to be funnel-shaped at one end away from the water injection pipe, and a plurality of filter holes are provided on the side wall of the inner tank at one end away from the water injection pipe;

[0010] A kinetic energy assembly, comprising a rotating shaft, a turbofan, and a generator, wherein the rotating shaft is rotatably mounted on the inner tank, the turbofan is fixedly mounted on the rotating shaft, and the blades of the turbofan are directly opposite the nozzle of the water injection pipe. The generator is fixedly mounted on the outer tank, and an input end of the generator is fixedly connected to one end of the rotating shaft. Sewage injected from the water injection pipe can drive the turbofan to rotate, thereby causing the generator to generate direct current.

[0011] An electromagnetic heating assembly, the electromagnetic heating assembly comprising a positive coil and a negative coil, one end of the positive coil being electrically connected to the positive pole of the generator, the positive coil being spirally wound on the inner tank, the other end of the positive coil being provided with a positive module, the positive module being embedded in the end of the inner tank away from the water injection pipe, one end of the negative coil being electrically connected to the negative pole of the generator, the other end of the negative coil being provided with a negative module, the negative module being embedded in the inner tank, and the negative module being located above the positive module;

[0012] A stirring assembly, the stirring assembly includes a stirring member and a spoiler, the stirring member and the spoiler are both fixed on the rotating shaft, and the stirring member is located below the turbofan, the spoiler is located below the stirring member, a spiral baffle is fixed on the spoiler, the rotation direction of the baffle is opposite to the direction of the rotating shaft, the baffle is provided in multiple groups, and the baffles are distributed in a circle along the rotating shaft, and a number of drainage holes are also provided on the spoiler, and the discharge volume of sewage at the drainage hole is less than the injection volume at the water injection pipe, so that a sewage cache collection area is present at the spoiler.

[0013] By adopting the above technical solution, the kinetic energy of the sewage itself is used to drive the shaft to rotate, which in turn drives the generator to generate direct current. The direct current generated by the generator generates Joule heat through the positive coil wound on the inner tank, thereby heating the sewage in the tank body to promote the precipitation reaction between the hardness ions in the sewage and the chemical reagent. At the same time, the negative coil is electrically connected to the negative module, which attracts the hardness ions in the sewage, thereby slowing the rate of freeing of the hardness ions in the sewage. This further promotes the contact reaction between the hardness ions and the chemical reagent, ensuring that the chemical reagent can fully react with the hardness ions and improve the removal efficiency of the hardness ions. In addition, when the direct current passes through the positive and negative coils, an electromagnetic field will be generated around them. The electromagnetic field can promote the contact opportunities between calcium ions and carbonate ions, accelerating the crystallization and precipitation of hardness ions and carbonate ions. At the same time, under the influence of the electromagnetic field, the arrangement of water molecules around the ions will change, changing the hydration state of the ions. As a result, the physical and chemical properties of the hardness ions and carbonate ions in the water will also change, making it difficult for them to combine to form stable crystals. The crystal nucleation process will be disrupted. Even when calcium and carbonate ions come into contact, they don't easily form stable nucleation centers. Nucleation centers are the initial points of crystal growth. Electromagnetic fields disrupt the formation of these centers by altering ion movement and alignment. Consequently, even if crystals do form, they typically have a loose aragonite structure rather than a dense calcite structure. Aragonite crystals are more flexible and less likely to adhere to pipe and equipment surfaces, thus reducing scaling.

[0014] Optionally, it also includes a filter press assembly, which includes an outer water collecting pipe, an inner screen tube, an extrusion roller and a transmission member. The outer water collecting pipe is passed through the outer tank, the outer water collecting pipe is connected to the outer tank, the inner screen tube is coaxially fixed in the outer water collecting pipe, one end of the inner screen tube extends into the outer tank, and the other end of the inner screen tube is provided with a discharge port. The end of the inner screen tube extending into the outer tank is connected to the inner tank through the slag outlet, the extrusion roller is coaxially arranged in the inner screen tube, the transmission member is arranged at one end of the extrusion roller, the extrusion roller is connected to the rotating shaft through the transmission member, and the extrusion roller cooperates with the inner screen tube to filter the generated sediment.

[0015] By adopting the above technical solution, the turbofan is used to drive the rotation of the rotating shaft, and the extrusion roller in the filter press assembly is driven to rotate through the transmission member. The extrusion roller and the inner screen tube cooperate with each other to achieve the separation of solid sediment and liquid in the sewage. This not only greatly reduces the burden of subsequent treatment processes and improves the operating efficiency of the entire treatment system, but also enables the solid sediment collected after the filtration to be further processed and recycled, realizing the circular utilization of resources and complying with the concept of sustainable development. In addition, no additional drive source is required to drive the extrusion roller to rotate, which reduces production costs and improves energy utilization efficiency.

[0016] Optionally, the extrusion roller is configured to be cylindrical with a certain taper, a spiral extrusion portion is fixedly provided on the extrusion roller, and the pitch of the spiral extrusion portion gradually decreases along the axis of the extrusion roller in a direction away from the inner tank.

[0017] By adopting the above technical solution, the taper design of the squeezing roller and the pitch change of the spiral squeezing part make the squeezing force gradually increase during the filtration process, thereby more fully squeezing the sediment in the sewage and improving the filtration effect and efficiency; the spiral design of the spiral squeezing part helps to discharge the sediment smoothly during the filtration process, reduce the risk of equipment blockage, and ensure the stable operation of the equipment.

[0018] Optionally, the transmission member includes a driving bevel gear and a driven bevel gear, a rotating shaft is fixed to one end of the extrusion roller, the rotating shaft passes through the inner screen tube and the outer tank in sequence, and the rotating shaft is rotationally connected to the inner screen tube and the outer tank, the driving bevel gear is fixed to one end of the rotating shaft away from the water injection pipe, the driven bevel gear is fixed on the rotating shaft, and the driving bevel gear is meshed with the driven bevel gear.

[0019] By adopting the above technical solution, the transmission part adopts the transmission design of the bevel gear set, which ensures that the kinetic energy generated by the kinetic energy component can be efficiently and stably transmitted to the extrusion roller, thereby improving the transmission efficiency and reliability of the equipment and reducing energy loss. In addition, the gear transmission has high mechanical strength and wear resistance, and can operate stably for a long time under high load, thereby extending the service life of the equipment.

[0020] Optionally, an inertia wheel is provided on the rotating shaft, the inertia wheel is fixedly connected to the rotating shaft, and the inertia wheel is located on the side of the driven bevel gear away from the inner screen tube; when the water injection pipe stops injecting water and the rotating shaft cannot drive the squeezing roller to rotate, the inertia wheel can continue to drive the squeezing roller to rotate due to its own inertia.

[0021] By adopting the above technical solution, the inertia wheel uses its own inertia to drive the squeezing roller to continue rotating for a period of time after the water injection stops, ensuring that the equipment will not stop operating immediately when the sewage flow stops, avoiding equipment damage or unstable operation caused by instantaneous shutdown, and can discharge the sediment in the inner screen tube, avoiding the sediment from being blocked by the inner screen tube due to failure to be discharged in time, thereby affecting subsequent use.

[0022] Optionally, the water injection pipe is provided with an automatic feeding assembly, the automatic feeding assembly includes a piston tube, a feeding piston tube and a feeding tube, one end of the piston tube is tilted and fixed on the water injection pipe, the piston tube is connected to the water injection pipe, the feeding piston tube is slidably arranged in the piston tube, the feeding piston tube is closed at one end close to the water injection pipe, and a discharge hole is provided on the side wall of the feeding piston tube close to the closed end; the feeding tube is inserted into the end of the piston tube away from the water injection pipe, and One end of the feeding tube extending into the piston tube is slidably connected to the feeding piston tube, a sealing piece is coaxially fixed on the inner wall of the feeding piston tube, and an abutment ring is fixed on the end of the feeding tube extending into the piston tube. The sealing piece extends into the feeding tube, and the sealing piece can abut and cooperate with the abutment ring to block the feeding tube; when the water injection pipe injects sewage into the inner tank, the feeding piston tube can slide in the piston tube, thereby connecting the feeding piston tube with the feeding tube.

[0023] By adopting the above technical solution, the automatic feeding component can use the kinetic energy of the sewage itself to push the feeding piston tube to slide inside the piston tube during the sewage treatment process, thereby connecting the feeding piston tube with the feeding tube, thereby realizing automatic feeding. It can not only ensure the precise control of the feeding process, avoid excessive or insufficient feeding, improve the feeding uniformity and treatment effect, but also reduce manual operation, improve the automation level and treatment efficiency of the system, and reduce operating costs.

[0024] Optionally, a sealing portion is fixedly provided on the inner wall of the water injection pipe, and the closed end of the feeding piston tube can abut against the sealing portion. The axis of the water injection pipe is tangent to the side wall of the inner tank, and the sewage injected from the water injection pipe can rotate and move downward along the inner wall of the inner tank.

[0025] By adopting this technical solution, the injection pipe axis is designed to be tangential to the inner tank wall, allowing the sewage to spiral downward along the inner tank wall, promoting thorough mixing of the sewage and the feed material, thereby improving treatment efficiency. The sealing portion ensures that the sewage's own kinetic energy is fully applied to the feed piston tube, thereby ensuring smooth automatic feeding.

[0026] Optionally, the automatic feeding assembly further includes a return spring, which is sleeved on the feeding tube, one end of the return spring is fixedly connected to the end of the feeding piston tube away from the water injection tube, and the other end of the return spring is fixedly connected to the inner wall of the piston tube.

[0027] By adopting the above technical solution, the setting of the reset spring ensures that the feeding piston tube can automatically reset after the feeding is completed, avoiding the operational inconvenience and efficiency reduction caused by manual intervention, and improving the automation level of the equipment. At the same time, the setting of the reset spring also reduces the possibility of the feeding piston tube getting stuck or blocked, ensuring the smoothness of the automatic feeding process, and improving the operating reliability and service life of the equipment.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. By adopting the above technical solution, the kinetic energy of the sewage itself is used to drive the shaft to rotate, thereby driving the generator to generate direct current. The direct current generated by the generator generates Joule heat through the positive coil wound on the inner tank, thereby heating the sewage in the tank to promote the precipitation reaction between the hardness ions in the sewage and the chemical reagent. At the same time, the negative coil is electrically connected to the negative module, which attracts the hardness ions in the sewage, thereby slowing the rate of freeing of the hardness ions in the sewage. This further promotes the contact reaction between the hardness ions and the chemical reagent, ensuring that the chemical reagent can fully react with the hardness ions and improve the removal efficiency of the hardness ions. In addition, when the direct current passes through the positive and negative coils, an electromagnetic field will be generated around them. The electromagnetic field can promote the contact opportunities between calcium ions and carbonate ions, accelerating the crystallization and precipitation of hardness ions and carbonate ions. At the same time, under the influence of the electromagnetic field, the arrangement of water molecules around the ions will change, changing the hydration state of the ions. In this way, the physical and chemical properties of the hardness ions and carbonate ions in the water will also change, making it difficult for them to combine to form stable crystals. The crystal nucleation process will be disrupted. Even if calcium ions and carbonate ions come into contact, they do not easily form stable nucleation centers. Nucleation centers are the initial points of crystal growth, and electromagnetic fields interfere with the formation of nucleation centers by changing the movement and arrangement of ions. As a result, even if crystals are formed, these crystals are usually loose aragonite structures rather than dense calcite structures. Aragonite crystals are relatively loose and not easy to adhere to the surface of pipes and equipment, thereby reducing the formation of scale;

[0030] 2. By adopting the above technical solution, when the sewage doped with chemical reagents rotates and moves downward along the inner wall of the inner tank, the sewage contacts the spoiler. Since the rotation direction of the flow-blocking strips provided on the spoiler is opposite to the flow direction of the sewage, the sewage is decelerated at the location where it meets the spoiler, and turbulence opposite to the original flow direction of the sewage occurs. This, combined with the stirring of the stirring element, can further fully react with the sodium carbonate in the sewage and the hardness ions, thereby improving the removal efficiency of the hardness ions. In addition, under the stirring action of the stirring element, not only can the sewage be evenly heated, avoiding local overheating or uneven heating problems, but also the sediment can be prevented from aggregating into scale, thereby improving the treatment effect of sewage softening.

[0031] 3. By adopting the above technical solution, the turbofan drives the rotating shaft to rotate, and then drives the squeezing roller in the filter press assembly to rotate through the transmission member. The squeezing roller and the inner screen tube cooperate with each other to achieve the separation of solid sediment and liquid in the sewage. This not only greatly reduces the burden of subsequent treatment processes and improves the operating efficiency of the entire treatment system, but also enables the solid sediment collected after the filtration to be further processed and recycled, realizing the recycling of resources and conforming to the concept of sustainable development. In addition, no additional drive source is required to drive the squeezing roller, reducing production costs and improving energy efficiency.

[0032] 4. The tapered design of the squeezing roller and the pitch variation of the spiral squeezing part allow the squeezing force to gradually increase during the filtration process, thereby more fully squeezing the sediment in the sewage and improving the filtration effect and efficiency. The spiral design of the spiral squeezing part helps to discharge the sediment smoothly during the filtration process, reducing the risk of equipment blockage and ensuring stable operation of the equipment.

[0033] 5. The inertia wheel uses its own inertia to drive the squeezing roller to continue rotating for a period of time after the water injection stops, ensuring that the equipment will not stop running immediately when the sewage flow stops, avoiding equipment damage or unstable operation caused by instantaneous shutdown. It can also discharge the sediment in the inner screen tube to avoid the sediment being blocked by the inner screen tube due to failure to be discharged in time, thereby affecting subsequent use;

[0034] 6. During the sewage treatment process, the automatic feeding component can use the kinetic energy of the sewage itself to push the feeding piston tube to slide inside the piston tube, thereby connecting the feeding piston tube with the feeding tube to achieve automatic feeding. This not only ensures the precise control of the feeding process, avoids excessive or insufficient feeding, improves the feeding uniformity and treatment effect, but also reduces manual operation, improves the system's automation level and treatment efficiency, and reduces operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of a wastewater treatment device for pulp and papermaking in an embodiment of the present application.

[0036] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the automatic feeding component in the embodiment of the present application.

[0037] Figure 3 It is a structural diagram of the automatic feeding component in an embodiment of the present application.

[0038] Figure 4 It is a schematic diagram of the half-section structure of the wastewater treatment device for pulp and papermaking in the embodiment of the present application.

[0039] Figure 5 yes Figure 4 Enlarged schematic diagram of part A.

[0040] Figure 6 It is a structural schematic diagram of the stirring assembly in an embodiment of the present application.

[0041] Reference numerals: 1, tank body; 11, outer tank; 111, water injection pipe; 1111, sealing portion; 112, drainage pipe; 12, inner tank; 121, slag outlet; 122, filter hole; 123, support ring;

[0042] 2. Kinetic energy component; 21. Rotating shaft; 22. Turbofan; 23. Generator;

[0043] 3. Electromagnetic heating assembly; 31. Positive coil; 32. Negative coil; 33. Positive module; 34. Negative module; 35. Isolation ring;

[0044] 4. Stirring assembly; 41. Stirring element; 411. Connecting sleeve; 412. Stirring paddle; 42. Spoiler; 421. Flow blocking strip; 422. Drain hole;

[0045] 5. Filter press assembly; 51. External water collecting pipe; 52. Internal screen tube; 521. Discharge port; 53. Extrusion roller; 531. Screw extrusion unit; 532. Rotating shaft; 54. Transmission element; 541. Driving bevel gear; 542. Driven bevel gear; 55. Inertia wheel;

[0046] 6. Automatic feeding assembly; 61. Piston tube; 611. Connecting part; 62. Feeding piston tube; 621. Discharge hole; 622. Sealing piece; 623. Sealing part; 63. Feeding tube; 631. Abutting ring; 64. Return spring. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-6 This application is described in further detail.

[0048] The embodiment of the present application discloses a wastewater treatment device for pulp and papermaking.

[0049] Reference Figure 1 and Figure 2 The pulp and papermaking wastewater treatment device includes a tank body 1, an automatic feeding component 6, a kinetic energy component 2, an electromagnetic heating component 3, a stirring component 4, and a filter press component 5. The tank body 1 includes an outer tank 11 and an inner tank 12. The inner tank 12 is mounted inside the outer tank 11. The automatic feeding component 6 and the filter press component 5 are both installed on the outer tank 11. The kinetic energy component 2, the electromagnetic heating component 3, and the stirring component 4 are all installed on the inner tank 12. The stirring component 4 is located inside the inner tank 12.

[0050] The tank body 1 serves as a container for treating sewage, and the automatic feeding component 6 can use the kinetic energy of the sewage injected into the tank body 1 to automatically add chemical precipitation reagents; the kinetic energy component 2 can convert the kinetic energy of the sewage injected into the tank body 1 into electrical energy to drive the electromagnetic heating component 3, as well as mechanical energy to drive the stirring component 4 and the filter press component 5; the electromagnetic heating component can heat the sewage in the inner tank 12 through the electrical energy generated by the kinetic energy component 2, and use the electromagnetic field in the electromagnetic heating component 3 to accelerate the chemical reaction between the hardness ions in the sewage and the chemical reagents; the stirring component 4 can stir the sewage under the drive of the kinetic energy component 2, so that the sewage and the chemical reagents can be fully in contact; the filter press component 5 can squeeze and dehydrate the generated hardness ion precipitate, and separate the precipitate from the sewage.

[0051] Reference Figure 1 In the embodiment of the present application, the tank body 1 includes an outer tank 11 and an inner tank 12, a water injection pipe 111 is fixedly provided at one end of the outer tank 11, and a drainage pipe 112 is provided at the other end of the outer tank 11, and a support ring 123 is fixedly provided on the inner tank 12. The inner tank 12 is mounted in the outer tank 11 through the support ring 123, and the water injection pipe 111 passes through the side wall of the outer tank 11 and is connected to the inner tank 12, and the axis of the water injection pipe 111 is tangent to the side wall of the inner tank 12, and the end of the inner tank 12 away from the water injection pipe 111 is set to a funnel shape, and a slag outlet 121 is also provided at the end of the inner tank 12 set to a funnel shape, and a plurality of filter holes 122 are opened on the side wall of the inner tank 12 set to a funnel shape. The opened filter holes 122 can discharge a portion of the treated sewage in advance.

[0052] The funnel-shaped design at the rear of the inner tank 12 helps to concentrate the sediment at the bottom of the inner tank 12, facilitating subsequent filtration and slag removal, reducing the dispersion of sediment during the sewage treatment process and improving treatment efficiency. The filter holes 122 can initially filter the sewage, reduce the water content of the sediment, and thus improve the subsequent filtration effect of the sediment.

[0053] Reference Figure 2 and Figure 3 An automatic feeding component 6 is provided on the water injection pipe 111, and the automatic feeding component 6 includes a piston tube 61, a feeding piston tube 62 and a feeding tube 63. In the embodiment of the present application, the chemical precipitation reagent is sodium carbonate. One end of the piston tube 61 is inclined and fixed on the water injection pipe 111, and the piston tube 61 is connected to the water injection pipe 111. A connecting portion 611 is provided at the other end of the piston tube 61. The feeding piston tube 62 is slidably arranged in the piston tube 61. The end of the feeding piston tube 62 close to the water injection pipe 111 is closed, and a discharge hole 621 is opened on the side wall of the feeding piston tube 62 close to the closed end. A sealing portion 1111 is fixed on the inner wall of the water injection pipe 111, and the closed end of the feeding piston tube 62 can abut against the sealing portion 1111.

[0054] The feeding tube 63 is inserted into the piston tube 61 from one end provided with a connecting portion 611, and the end of the feeding tube 63 extending into the piston tube 61 is slidably connected with the feeding piston tube 62. The diameter of the feeding piston tube 62 is larger than the diameter of the feeding tube 63. The end of the feeding tube 63 extending into the piston tube 61 is fixedly provided with a butt ring 631, and a sealing piece 622 is coaxially fixed on the inner wall of the feeding piston tube 62. The sealing piece 622 extends into the feeding tube 63, and the end of the sealing piece 622 extending into the feeding tube 63 is fixedly provided with a sealing portion 623. The sealing portion 623 can abut and cooperate with the butt ring 631, thereby blocking the feeding tube 63; the return spring 64 is sleeved on the feeding tube 63, and one end of the return spring 64 is fixedly connected to the end of the feeding piston tube 62 away from the water injection pipe 111, and the other end of the return spring 64 is fixedly connected to the inner wall of the piston tube 61.

[0055] When the water injection pipe 111 does not inject sewage into the inner tank 12, under the action of the return spring 64, one end of the closed feeding piston tube 62 abuts against the sealing part 1111, and the blocking part 623 abuts against the abutment ring 631, thereby blocking the feeding pipe 63; when the water injection pipe 111 injects sewage into the inner tank 12, under the action of the sewage's own kinetic energy, the feeding piston tube 62 can slide in the piston tube 61 in the direction away from the water injection pipe 111, thereby causing the blocking part 623 to disengage from the abutment ring 631, and the feeding piston tube 62 is connected to the feeding pipe 63, thereby causing the sodium carbonate in the feeding pipe 63 to be discharged from the discharge hole 621 and enter the inner tank 12 together with the sewage.

[0056] Reference Figure 4 The kinetic energy component 2 includes a rotating shaft 21, a turbofan 22 and a generator 23. The rotating shaft 21 rotates coaxially and passes through the inner tank 12. One end of the rotating shaft 21 extends out of the inner tank 12. The turbofan 22 is fixed on the rotating shaft 21. The blades of the turbofan 22 are facing the nozzle of the water injection pipe 111. When the water injection pipe 111 injects sewage into the inner tank 12, the sewage can drive the turbofan 22 to rotate, thereby driving the rotating shaft 21 to rotate.

[0057] The generator 23 is fixedly mounted at the end of the outer tank 11 , and the rotating shaft 21 is fixedly connected to the input shaft of the generator 23 . When the turbofan 22 drives the rotating shaft 21 to rotate, the rotating shaft 21 simultaneously starts the generator 23 to generate direct current.

[0058] Reference Figure 4 and Figure 5 In the embodiment of the present application, the electromagnetic heating component 3 includes a positive coil 31, a negative coil 32, a positive module 33, a negative module 34 and an isolation ring 35. One end of the positive coil 31 is electrically connected to the positive pole of the generator 23. The positive coil 31 is spirally wound on the outer wall of the inner tank 12. The positive module 33 is embedded in the inner wall of the inner tank 12 away from the water injection pipe 111. The positive module 33 is set to a circular ring shape, and the positive module 33 is electrically connected to the positive coil 31.

[0059] One end of the negative coil 32 is electrically connected to the negative pole of the generator 23 . The negative module 34 is embedded in the inner wall of the inner tank 12 . The negative module 34 is cylindrical and is located above the positive module 33 .

[0060] The above-mentioned positive electrode module 33 and negative electrode module 34 are both made of chrome-plated stainless steel. The use of chrome-plated positive electrode module 33 and negative electrode module 34 can slow down the electrolysis reaction of water. However, since the hardness ions in the sewage are mainly positively charged cations, the negative electrode module 34 is electrically connected to the negative electrode of the generator 23, and the positive electrode module 33 is electrically connected to the positive electrode of the generator 23. The hardness ions in the sewage undergo an electrophoresis effect, and the positively charged ions will move toward the negative electrode, while the negatively charged ions will move toward the positive electrode. The negative electrode module 34 will attract these hardness ions, thereby intercepting them from the sewage and slowing down the free speed of the ions in the sewage. At the same time, the sewage rotates downward along the inner wall of the inner tank 12, and the positive electrode module 33 is located below the negative electrode module 34, so the hardness ions can fully react with sodium carbonate.

[0061] Of course, the positive electrode module 33 and the negative electrode module 34 can also be made of other materials, as long as the materials used have a higher overpotential or can form a passivation layer during the electrolysis process, thereby reducing the electrolysis reaction rate.

[0062] The isolation ring 35 is disposed between the positive electrode module 33 and the negative electrode module 34 . The isolation ring 35 can prevent the positive electrode module 33 and the negative electrode module 34 from being directly connected.

[0063] In addition, the positive coil 31 uses a heating wire with a certain resistance. When the generator 23 generates direct current driven by the rotating shaft 21, the positive coil 31 will generate heat due to the resistance effect, thereby heating the sewage in the inner tank 12 to accelerate the chemical reaction between sodium carbonate and hardness ions. Moreover, since there is direct current in both the positive coil 31 and the negative coil 32, an electromagnetic field will exist around the inner tank 12. The electromagnetic field can promote the contact between calcium ions and carbonate ions, and accelerate the crystallization and precipitation rate of hardness ions and carbonate ions.

[0064] However, under the influence of the electromagnetic field, the arrangement of water molecules around the ions will change, altering the hydration state of the ions. As a result, the physical and chemical properties of the hardness ions and carbonate ions in the water will also change, making it difficult for them to combine to form stable crystals. The process of crystal nucleation will be disrupted. Even if calcium ions and carbonate ions come into contact, they will not easily form a stable nucleation center. The nucleation center is the starting point of crystal growth. The electromagnetic field interferes with the formation of the nucleation center by changing the movement and arrangement of ions. As a result, even if crystals are formed, these crystals are usually loose aragonite structures rather than dense calcite structures. Aragonite crystals are relatively loose and not easy to adhere to the surface of pipes and equipment, thereby reducing the formation of scale.

[0065] Reference Figure 6 The stirring assembly 4 includes a stirring member 41 and a spoiler 42. The stirring member 41 is located below the turbofan 22. The stirring member 41 includes a connecting sleeve 411 and a stirring paddle 412. In the embodiment of the present application, the connecting sleeve 411 is fixedly connected to the rotating shaft 21. The stirring paddle 412 is configured as a straight plate. The stirring paddle 412 is fixed on the connecting sleeve 411. There are multiple groups of stirring paddles 412, and they are arranged in a circular pattern on the connecting sleeve 411.

[0066] Of course, in other embodiments of the present application, the stirring paddle 412 may also be configured to have other shapes, as long as it can stir the sewage under the drive of the rotating shaft 21 .

[0067] The spoiler 42 is fixed on the rotating shaft 21 and is located below the connecting sleeve 411. The spoiler 42 is arranged in a conical hat shape. A spiral baffle 421 is fixed on the spoiler 42. The rotation direction of the baffle 421 is opposite to the direction of the rotating shaft 21. There are multiple groups of baffles 421, and the baffles 421 are distributed in a circle along the rotating shaft 21. The spoiler 42 is also provided with several groups of drainage holes 422. The discharge volume of sewage at the drainage holes 422 is slightly smaller than the injection volume at the water injection pipe 111. In this way, a sewage cache collection area will exist at the spoiler 42.

[0068] When the sewage doped with sodium carbonate rotates and moves downward along the inner wall of the inner tank 12, the sewage contacts the spoiler 42. Since the rotation direction of the baffle strip 421 provided on the spoiler 42 is opposite to the flow direction of the sewage, the sewage will be slowed down at the junction with the spoiler 42, and turbulence opposite to the original flow direction of the sewage will also appear. Combined with the stirring of the stirring element 41, the sodium carbonate in the sewage can further fully react with the hardness ions, thereby improving the removal efficiency of the hardness ions.

[0069] Reference Figure 4 In the embodiment of the present application, the filter press assembly 5 includes an outer water collecting pipe 51, an inner sieve tube 52, a squeeze roller 53, a transmission member 54, and an inertia wheel 55. The outer water collecting pipe 51 is fixedly installed on the outer tank 11 and is in communication with the outer tank 11. The inner sieve tube 52 is coaxially fixed inside the outer water collecting pipe 51. The inner sieve tube 52 is provided with a plurality of sieve holes on the tube body of the inner sieve tube 52. The precipitation produced by the hardness ions and sodium carbonate will be trapped in the inner sieve tube 52. One end of the inner sieve tube 52 extends into the outer tank 11, and the other end of the inner sieve tube 52 is provided with a discharge port 521. The end of the inner sieve tube 52 extending into the outer tank 11 is in communication with the inner tank 12 through the slag discharge port 121.

[0070] A rotating shaft 532 is fixedly provided at one end of the squeezing roller 53, and the rotating shaft 532 passes through the inner screen tube 52 and the side wall of the outer tank 11 in sequence. The rotating shaft 532 is rotatably connected to the inner screen tube 52 and the outer tank 11. The squeezing roller 53 is coaxially arranged in the inner screen tube 52. The squeezing roller 53 is set to a cylindrical shape with a certain taper, and the taper gradually decreases along the axis of the squeezing roller 53 in the direction away from the inner tank 12. The end of the squeezing roller 53 away from the inner tank 12 is set to a cone shape. A spiral squeezing portion 531 is fixed on the squeezing roller 53, and the spiral squeezing portion 531 abuts against the inner wall of the inner screen tube 52, and the pitch of the spiral squeezing portion 531 gradually decreases along the axis of the squeezing roller 53 in the direction away from the inner tank 12.

[0071] The discharge port 521 on the inner sieve tube 52 is funnel-shaped, with a taper slightly larger than that of the conical end of the squeezing roller 53. As the squeezing roller 53 rotates, it pushes the precipitate produced by the hardness ions and sodium carbonate forward. The spiral squeezing portion 531 cooperates with the inner wall of the inner sieve tube 52 to filter the resulting precipitate, resulting in a relatively dry discharged precipitate.

[0072] The transmission member 54 is arranged on the rotating shaft 532. The transmission member 54 includes a driving bevel gear 541 and a driven bevel gear 542. The transmission ratio of the driving bevel gear 541 and the driven bevel gear 542 is greater than one. The driving bevel gear 541 is fixed to the end of the rotating shaft 21 away from the water injection pipe 111, and the driven bevel gear 542 is fixed to the rotating shaft 532. The driving bevel gear 541 and the driven bevel gear 542 are engaged. When the turbofan 22 drives the rotating shaft 21 to rotate, the driving bevel gear 541 drives the driven bevel gear 542 to rotate, thereby rotating the squeezing roller 53. The spiral squeezing portion 531 cooperates with the inner wall of the inner screen tube 52 to filter the generated sediment.

[0073] The inertia wheel 55 is mounted on the rotating shaft 532 and is located on the side of the driven bevel gear 542 facing away from the inner screen tube 52. The inertia wheel 55 is fixedly connected to the rotating shaft 21 and has a certain amount of deadweight. This ensures that even if the water injection pipe 111 stops injecting sewage into the inner tank 12 and the rotating shaft 21 is unable to drive the squeezing roller 53 to rotate, the squeezing roller 53 will continue to rotate under the action of the inertia wheel 55, squeezing and dehydrating the resulting sediment before discharge.

[0074] The implementation principle of the pulp and papermaking sewage treatment device of the embodiment of the present application is as follows: sewage is injected into the inner tank 12 through the water injection pipe 111, and the sewage can make the feeding piston tube 62 slide in the piston tube 61, so that the feeding piston tube 62 is connected with the feeding pipe 63, and then the sodium carbonate in the feeding pipe 63 rotates downward along the inner wall of the inner tank 12 together with the sewage; when the sewage is injected into the inner tank 12, it also drives the turbofan 22 to rotate, and the turbofan 22 drives the rotating shaft 21 to rotate, which can enable the generator 23 to generate direct current, and the direct current is then passed through the positive coil 31 is introduced into the positive electrode module 33, and then from the negative electrode module 34 to the negative electrode coil 32, thereby forming a closed loop. At this time, the sewage doped with sodium carbonate in the inner tank 12 is accelerated by the heating effect of the positive electrode coil 31, the attraction of cations by the negative electrode module 34 embedded in the inner tank 12, and the electromagnetic field around the positive electrode coil 31 and the negative electrode coil 32. The precipitate is then dehydrated and discharged through the filtration action of the squeezing roller 53 and the inner sieve tube 52. The treated sewage will be discharged from the drain pipe 112 on the outer tank 11.

[0075] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A wastewater treatment device for pulp and paper making, characterized in that: include: A tank body (1), the tank body (1) comprising an outer tank (11) and an inner tank (12), the inner tank (12) being fixedly provided with a support ring (123), the inner tank (12) being mounted in the outer tank (11) via the support ring (123), a water injection pipe (111) being provided at one end of the outer tank (11), a drainage pipe (112) being provided at the other end of the outer tank (11), the water injection pipe (111) passing through the outer tank (11) and the inner tank (12) in sequence, and the water injection pipe (111) being in communication with the inner tank (12), and a slag outlet (121) being provided at one end of the inner tank (12) away from the water injection pipe (111); The inner tank (12) is configured in a funnel shape at one end away from the water injection pipe (111), and a plurality of filter holes (122) are provided on the side wall of the inner tank (12) at one end away from the water injection pipe (111); A kinetic energy component (2), the kinetic energy component (2) comprising a rotating shaft (21), a turbofan (22) and a generator (23), the rotating shaft (21) being rotatably mounted on the inner tank (12), the turbofan (22) being fixedly mounted on the rotating shaft (21), the blades of the turbofan (22) being directly opposite to the nozzle of the water injection pipe (111), the generator (23) being fixedly mounted on the outer tank (11), the input end of the generator (23) being fixedly connected to one end of the rotating shaft (21), the sewage injected from the water injection pipe (111) being able to drive the turbofan (22) to rotate, thereby causing the generator (23) to generate direct current; An electromagnetic heating assembly (3), the electromagnetic heating assembly (3) comprising a positive coil (31) and a negative coil (32), one end of the positive coil (31) being electrically connected to the positive pole of the generator (23), the positive coil (31) being spirally wound on the inner tank (12), the other end of the positive coil (31) being provided with a positive module (33), the positive module (33) being embedded in an end of the inner tank (12) away from the water injection pipe (111), one end of the negative coil (32) being electrically connected to the negative pole of the generator (23), the other end of the negative coil (32) being provided with a negative module (34), the negative module (34) being embedded in the inner tank (12), and the negative module (34) being located above the positive module (33); A stirring assembly (4), the stirring assembly (4) comprising a stirring member (41) and a spoiler (42), the stirring member (41) and the spoiler (42) being fixed on the rotating shaft (21), and the stirring member (41) being located below the turbofan (22), and the spoiler (42) being located below the stirring member (41), a spiral baffle (421) being fixed on the spoiler (42), the rotation direction of the baffle (421) being opposite to the rotation direction of the rotating shaft (21), a plurality of baffles (421) being provided, and the baffles (421) being distributed circumferentially along the rotating shaft (21), and a plurality of drainage holes (422) being provided on the spoiler (42), the discharge amount of sewage at the drainage holes (422) being less than the injection amount at the water injection pipe (111), so that a sewage buffering and collecting area is formed at the spoiler (42).

2. A pulp and papermaking wastewater treatment device according to claim 1, characterized in that: The filter press assembly (5) further comprises an outer water collecting pipe (51), an inner screen pipe (52), a squeezing roller (53) and a transmission member (54), wherein the outer water collecting pipe (51) is passed through the outer tank (11), the outer water collecting pipe (51) is communicated with the outer tank (11), the inner screen pipe (52) is coaxially fixed in the outer water collecting pipe (51), one end of the inner screen pipe (52) extends into the outer tank (11), and the other end of the inner screen pipe (52) is provided with a discharge port (52). 1), one end of the inner sieve tube (52) extends into the outer tank (11) and is connected to the inner tank (12) through the slag outlet (121), the squeezing roller (53) is coaxially rotatably arranged in the inner sieve tube (52), the transmission member (54) is arranged at one end of the squeezing roller (53), the squeezing roller (53) is transmission-connected to the rotating shaft (21) through the transmission member (54), and the squeezing roller (53) cooperates with the inner sieve tube (52) to filter the generated sediment.

3. The pulp and papermaking wastewater treatment device according to claim 2, characterized in that: The squeezing roller (53) is configured to be cylindrical with a certain taper, and a spiral squeezing portion (531) is fixedly provided on the squeezing roller (53), and the pitch of the spiral squeezing portion (531) gradually decreases along the axis of the squeezing roller (53) in a direction away from the inner tank (12).

4. The pulp and papermaking wastewater treatment device according to claim 3, characterized in that: The transmission member (54) includes a driving bevel gear (541) and a driven bevel gear (542). A rotating shaft (532) is fixedly provided at one end of the squeezing roller (53). The rotating shaft (532) passes through the inner screen tube (52) and the outer tank (11) in sequence, and the rotating shaft (532) is rotationally connected to the inner screen tube (52) and the outer tank (11). The driving bevel gear (541) is fixedly provided at one end of the rotating shaft (21) away from the water injection pipe (111). The driven bevel gear (542) is fixedly provided on the rotating shaft (532). The driving bevel gear (541) is meshed with the driven bevel gear (542).

5. The pulp and papermaking wastewater treatment device according to claim 4, characterized in that: An inertia wheel (55) is provided on the rotating shaft (532), and the inertia wheel (55) is fixedly connected to the rotating shaft (21). The inertia wheel (55) is located on the side of the driven bevel gear (542) facing away from the inner screen tube (52); when the water injection pipe (111) stops injecting water and the rotating shaft (21) cannot drive the squeezing roller (53) to rotate, the inertia wheel (55) can continue to drive the squeezing roller (53) to rotate due to its own inertia.

6. The pulp and papermaking wastewater treatment device according to claim 1, characterized in that: An automatic feeding assembly (6) is provided on the water injection pipe (111), and the automatic feeding assembly (6) includes a piston tube (61), a feeding piston tube (62) and a feeding pipe (63). One end of the piston tube (61) is tilted and fixed on the water injection pipe (111), and the piston tube (61) is communicated with the water injection pipe (111). The feeding piston tube (62) is slidably provided in the piston tube (61). The end of the feeding piston tube (62) close to the water injection pipe (111) is closed, and a discharge hole (621) is provided on the side wall of the feeding piston tube (62) close to the closed end; the feeding pipe (63) is inserted into the end of the piston tube (61) away from the water injection pipe (111), and the feeding One end of the feeding tube (63) extending into the piston tube (61) is slidably connected to the feeding piston tube (62); a sealing member (622) is coaxially fixed on the inner wall of the feeding piston tube (62); an abutting ring (631) is fixed to the end of the feeding tube (63) extending into the piston tube (61); the sealing member (622) extends into the feeding tube (63); the sealing member (622) can abut and cooperate with the abutting ring (631), thereby blocking the feeding tube (63); when the water injection pipe (111) injects sewage into the inner tank (12), the feeding piston tube (62) can slide in the piston tube (61), thereby connecting the feeding piston tube (62) with the feeding tube (63).

7. The pulp and papermaking wastewater treatment device according to claim 6, characterized in that: A sealing portion (1111) is fixedly provided on the inner wall of the water injection pipe (111), and the closed end of the feeding piston tube (62) can abut against the sealing portion (1111). The axis of the water injection pipe (111) is tangent to the side wall of the inner tank (12), and the sewage injected from the water injection pipe (111) can rotate and move downward along the inner wall of the inner tank (12).

8. The pulp and papermaking wastewater treatment device according to claim 7, characterized in that: The automatic feeding assembly (6) further comprises a return spring (64), which is sleeved on the feeding tube (63), one end of the return spring (64) being fixedly connected to the end of the feeding piston tube (62) away from the water injection tube (111), and the other end of the return spring (64) being fixedly connected to the inner wall of the piston tube (61).

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