Raw material disinfection device for clean papermaking
By removing nitrogen from the pulverizing tank in the clean papermaking unit to ensure ozone purity, and by utilizing the synergistic effect of ozone and hydrogen peroxide, the problems of poor disinfection effect and high energy consumption are solved, achieving clean production with efficient disinfection and resource conservation.
Patent Information
- Application Number
- CN202511653462.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2026-02-06
AI Technical Summary
Existing ozone disinfection technology suffers from poor disinfection effect, high energy consumption, and increased costs in the papermaking process. This is mainly because nitrogen in the air reacts with ozone to form nitrogen compounds, which weakens the disinfection effect and increases energy consumption.
A sterilization device for clean papermaking raw materials was designed. Nitrogen gas is extracted from the pulverizing tank through a sealed evacuation component to ensure ozone purity and sterilization is carried out in a low-nitrogen environment. The synergistic effect of ozone and hydrogen peroxide is combined to form an integrated process and realize gas recycling.
It improves disinfection effectiveness, reduces energy consumption and production costs, ensures paper quality, achieves resource conservation and clean production, and meets the needs of low-carbon and circular economy.
Smart Images
Figure CN121473151A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of disinfection device technology, specifically to a disinfection device for cleaning raw materials used in papermaking. Background Technology
[0002] Using recycled waste paper as raw material, through processes such as sorting and impurity removal, pulping, deinking and purification, low-quality paper such as packaging paper and toilet paper can be remanufactured. This model can reduce the consumption of virgin fibers such as trees by more than 60%, and reduce energy consumption by 30% and pollutant emissions by 40% compared with traditional papermaking processes. By recycling waste paper fibers, it avoids the felling of virgin forests and reduces the land occupied by waste paper landfills, thus achieving resource conservation and clean production at the same time. It provides a key path for the papermaking industry to practice low-carbon circular development. However, after waste paper comes into contact with oil, water and other substances, a large number of microorganisms multiply on the surface, which leads to the decomposition of paper fibers and a decline in quality. Therefore, disinfection devices are required.
[0003] In the clean papermaking process, ozone disinfection technology is often used when disinfection is carried out simultaneously with pulp bleaching. However, nitrogen in the air easily reacts with ozone to form nitrogen compounds, which not only reduces the purity of ozone and weakens the disinfection effect, but also forces ozone generators to increase energy consumption to maintain the concentration, resulting in increased production costs and energy waste. Summary of the Invention
[0004] The purpose of this invention is to solve the problems of poor disinfection effect, high energy consumption and increased cost caused by the defects of ozone disinfection technology in the existing waste paper disinfection process, and to propose a clean papermaking raw material disinfection device.
[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A device for sterilizing raw materials used in papermaking includes a frame and further includes: A bleaching tank is installed on the frame and is also connected to a corona ozone generating device. Hydrogen peroxide is continuously injected into the bleaching tank, and an output pipe is also installed through the center of the bleaching tank. A shredder is installed on the frame and communicates with the bleaching tank, with an opening at the end away from the bleaching tank for waste paper to enter; At least two pulping tanks are mounted on the frame and connected to a bleaching tank and a grinding tank, respectively, with water continuously injected into them; The sealed vacuum assembly, located inside the shredding tank, is used to cover the opening of the shredding tank to limit the waste paper and remove nitrogen from the tank, and to deliver the ozone generated by the corona ozone generator to the bleaching tank and the shredding tank to agitate and disinfect the waste paper. The shredding assembly, located inside the shredding tank, is used to shred waste paper into paper powder, and under the action of ozone flow, the paper powder is transported to the pulping tank to be mixed with water; The pulp preparation component is installed in each pulping tank and connected to the crushing component. It is used to mix shredded paper powder with water to form pulp and refine fibers. The final pulp is discharged into the bleaching tank and mixed with hydrogen peroxide for disinfection and bleaching. At the same time, the gas that participates in the reaction in the pulping tank and is reduced to oxygen is returned to the corona ozone generation equipment for recycling.
[0006] Based on the above technical solution, the present invention can be further improved as follows.
[0007] Furthermore, the bleaching tank is connected to the corona ozone generating equipment via a gas input pipe. The end of the gas input pipe extending into the bleaching tank is connected to a first dispersion disc. The bleaching tank is connected to the pulverizing tank via a straight pipe. The end of the straight pipe extending into the pulverizing tank is connected to a second dispersion disc. Both the first and second dispersion discs are provided with a number of dispersion holes.
[0008] Furthermore, the sealed evacuation assembly includes: A hydraulic push rod is fixed to the frame, with its output end facing the crushing tank; A fixed frame is connected to the output end of the hydraulic push rod and can be driven to make vertical displacement. A connecting shaft passes through the fixed frame and is rotatably connected to it; A sealing cover is connected to the end of the connecting shaft, and a recessed operating area is provided at the end away from the connecting shaft. A sealing element is disposed on the outside of the sealing cover to form a sealing contact with the inner wall of the pulverizing tank; A negative pressure pipeline is connected to the pulverizing tank. The negative pressure pipeline is also equipped with a negative pressure suction check valve and a first filter screen for removing gas from the pulverizing tank.
[0009] Furthermore, the connecting shaft includes: A drive shaft passes through the fixed frame and is rotatably connected to it; A sleeve is fitted over the outside of the drive shaft and fixedly connected to the sealing cover. The drive shaft can rotate axially at the center of the sleeve, and the sleeve has an installation space inside.
[0010] Furthermore, the pulverizing component includes: A drive motor is fixed on the mounting frame, and its output end is connected to the drive shaft. A prism, connected to the end of the drive shaft; A drive shaft is sleeved on the outside of the prism and forms a sliding connection with the prism. The drive shaft passes through the sealing cover and extends into its operating area. Multiple first crushing blades are arranged in a ring on the outer side of the drive shaft within the operating area; An electric push rod is fixed to the sealing cover and located within the installation space; A sliding seat is sleeved on the outside of the drive shaft and connected to the output end of the electric push rod. The drive shaft can rotate inside the sliding seat. The electric push rod drives the sliding seat to move the drive shaft axially to adjust the position of the first crushing tool in the operating area.
[0011] Furthermore, the sealing cover is connected to the pulping tank via a conveying hose that passes through the pulverizing tank, and is used to transport the shredded paper powder in the pulverizing tank to the pulping tank under the action of ozone flow. The pulping tank is connected to the input pipe of the corona ozone generating equipment via a gas output pipe. A second filter screen is provided in the gas output pipe. The pulping tank is also provided with a water inlet pipe to continuously inject water into the pulping tank.
[0012] Furthermore, the pulping tank and the bleaching tank are connected by a pulp conveying pipe, and the pulp conveying pipe is equipped with a hydrogen peroxide injection branch pipe with a one-way valve. The pulping tank is a conical structure with a top diameter larger than the bottom diameter.
[0013] Furthermore, the pulp preparation assembly includes: A rotating shaft is located at the center of the pulping tank and can rotate around it; A synchronous drive mechanism connects the rotating shaft and the drive shaft, and is used to drive the two to rotate synchronously; A baffle is installed inside the pulping tank, dividing its interior into a mixing zone and a discharge zone; A mixing cylinder is fixed to the partition plate and located in the mixing zone. Its side wall is provided with several circumferentially distributed through holes for connecting the fluid inside and outside the mixing cylinder. A shearing mechanism, located outside the rotating shaft, is used to mix shredded paper powder with water inside the mixing cylinder to make pulp and refine fibers; A solenoid valve, mounted on the partition, is used to control the pulp flow between the mixing zone and the discharge zone.
[0014] Furthermore, the synchronous drive mechanism includes: A transmission frame is fixed to the drive shaft and rotates synchronously with it; an external gear ring is fixedly installed on the outer side of the transmission frame. A meshing gear is fixed to the end of the rotating shaft and meshes with the external gear ring to achieve synchronous rotation of both.
[0015] Furthermore, the shearing mechanism includes: Axial flow fan blades, fixed to the outside of the rotating shaft, are used to drive the shredded paper powder in the pulping tank into the mixing cylinder; Multiple rotating blade holders are equidistantly distributed and fixedly connected along the axial direction of the rotating axis, and a second set of crushing blades is arranged on the outer circumferential side of each rotating blade holder; Multiple fixed blade holders are fixed to the inner wall of the mixing cylinder, corresponding one-to-one with the rotating blade holder. Each fixed blade holder has a third shredding blade group on its inner side. When the second shredding blade group rotates with the rotating shaft, it forms a shearing engagement with the third shredding blade group to mix the shredded paper powder with water to make pulp and refine the fibers.
[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This invention effectively prevents the reaction between nitrogen and ozone in the air by using a sealed evacuation assembly to cover the opening of the pulverizing tank and remove nitrogen from inside. This improves ozone purity and enhances the disinfection effect. Simultaneously, it eliminates the need for an ozone generator to consume excessive energy for concentration maintenance, reducing production costs and energy waste. The interconnected design of the pulverizing and pulping tanks, along with the arrangement of the pulverizing components, ensures that the pulping process, after waste paper is pulverized and mixed with water, takes place in an ozone environment. This ensures that the disinfection process is synchronized with the pulping process. Furthermore, hydrogen peroxide is injected into the bleaching tank and connected to the corona ozone generator, forming a synergistic disinfection system of ozone and hydrogen peroxide. This further enhances the disinfection effect by eliminating nitrogen interference. It has a strong killing effect on microorganisms on the surface of waste paper, inhibits fiber decomposition, and ensures paper quality. The oxygen reduced after the reaction in the pulping tank is recycled back to the corona ozone generation equipment, which reduces gas emissions and the raw material consumption for ozone preparation, thus realizing resource recycling. The entire device integrates disinfection, crushing, pulping, and bleaching into a single frame through the coordinated operation of its components, forming an integrated process. This not only solves the energy consumption and effectiveness problems caused by nitrogen interference, but also achieves clean production and low-carbon recycling simultaneously through the combined action of hydrogen peroxide and ozone and gas recycling, meeting the needs of the paper industry for resource conservation and pollutant reduction. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall connection structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the bleaching tank and the pulverizing tank of the present invention; Figure 3 This is a schematic diagram of the connection structure between the pulverizing tank and the pulping tank of the present invention; Figure 4 This is a schematic diagram of the internal structure of the bleaching tank and the pulverizing tank of the present invention; Figure 5 This is a schematic diagram of the connection structure between the drive shaft and the crushing component of the present invention; Figure 6 This is a schematic diagram of the internal connection structure of the pulping tank of the present invention; Figure 7 This is a schematic diagram of the internal connection structure of the mixing cylinder of the present invention.
[0018] In the diagram: 1. Frame; 2. Bleaching tank; 3. Crushing tank; 4. Pulping tank; 5. Sealed vacuum assembly; 51. Hydraulic push rod; 52. Fixing frame; 53. Connecting shaft; 531. Drive shaft; 532. Sleeve; 54. Sealing cover; 55. Seal; 56. Negative pressure pipeline; 6. Crushing assembly; 61. Drive motor; 62. Prism; 63. Transmission shaft; 64. First crushing cutter; 65. Electric push rod; 66. Sliding seat; 7. Pulp preparation assembly; 71. Rotating shaft; 72. Synchronous drive mechanism; 721. Transmission frame; 7 22. External gear ring; 723. Meshing gear; 73. Partition plate; 74. Mixing cylinder; 75. Through hole; 76. Shearing mechanism; 761. Axial flow fan blade; 762. Rotating blade holder; 763. Second crushing blade assembly; 764. Fixed blade holder; 765. Third crushing blade assembly; 77. Solenoid valve; 8. Gas input pipe; 9. First dispersion disc; 10. Straight pipe; 11. Second dispersion disc; 12. Conveying hose; 13. Gas output pipe; 14. Second filter screen; 15. Water inlet pipe; 16. Pulp conveying pipe; 17. Hydrogen peroxide injection branch pipe. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Combination Figures 1-7 As shown, a sterilization device for cleaning papermaking raw materials according to the present invention includes a frame 1, and further includes: Bleaching tank 2 is mounted on frame 1 and is also connected to corona ozone generating equipment. Hydrogen peroxide is continuously injected into bleaching tank 2. The shredder 3 is installed on the frame 1 and connected to the bleaching tank 2. The end of the shredder 3 away from the bleaching tank 2 is open for waste paper to enter. At least two pulping tanks 4 are set on the frame 1 and connected to the bleaching tank 2 and the crushing tank 3 respectively, and water is continuously injected into them; The sealed vacuum assembly 5 is installed inside the shredding tank 3. It is used to cover the opening of the shredding tank 3 to limit the waste paper and remove the nitrogen in the tank, and to transport the ozone generated by the corona ozone generator to the bleaching tank 2 and the shredding tank 3 to turn the waste paper and disinfect it. The shredding component 6 is located inside the shredding tank 3 and is used to shred waste paper into paper powder. Under the action of ozone flow, the paper powder is transferred to the pulping tank 4 to be mixed with water. The pulp preparation component 7 is installed in each pulping tank 4 and connected to the crushing component 6. It is used to mix shredded paper powder with water to form pulp and refine fibers. The final pulp is discharged into the bleaching tank 2 and mixed with hydrogen peroxide for disinfection and bleaching. At the same time, the gas in the pulping tank 4 that has been reduced to oxygen after participating in the reaction is returned to the corona ozone generation equipment for recycling.
[0021] The waste paper to be processed enters the shredder 3 through an opening on the side away from the bleaching tank 2. The sealed vacuum assembly 5 on the frame 1 first forms a sealed space by covering the opening of the shredder 3, and uses negative pressure to remove nitrogen from the tank, creating a low-nitrogen environment to prevent nitrogen in the air from reacting with ozone to form nitrogen compounds. This ensures that the ozone generated by the corona ozone generator can be delivered to the bleaching tank 2 and the shredder 3 in a high-purity state. In the shredder 3, ozone kills microorganisms on the surface of the waste paper and inhibits fiber decomposition. On the other hand, it forms an airflow that agitates the waste paper, and together with the shredder assembly 6, it shreds the waste paper into paper powder. Under the driving force of the ozone flow, the paper powder is transferred to the pulping tank 4, which is continuously filled with water, through the connection structure with the pulping tank 4. The pulp preparation group inside the pulping tank 4... Unit 7 mixes shredded paper powder with water to form pulp, and then refines the fibers to form preliminary pulp. The resulting pulp is then discharged into bleaching tank 2, where it is mixed with hydrogen peroxide continuously injected into the tank. The synergistic effect of ozone and hydrogen peroxide is used for deep disinfection and bleaching. In pulping tank 4, the oxygen generated after the reaction is reduced is returned to the corona ozone generation equipment, realizing gas recycling and reducing the energy consumption of ozone preparation. Throughout the process, bleaching tank 2 is interconnected with shredding tank 3 and pulping tank 4. Through the removal of nitrogen by the sealed evacuation component 5, the directional delivery of ozone, and the coordinated operation of each component, the interference of nitrogen on ozone is avoided in the shredding and disinfection process, improving the disinfection effect and reducing energy consumption. Furthermore, through the mixing and bleaching of pulp and hydrogen peroxide and the recycling of gas, resource conservation and clean production are achieved.
[0022] In a preferred embodiment, the present invention may be further configured as follows: Figure 1 , Figure 4 As shown; the bleaching tank 2 is connected to the corona ozone generating equipment through the gas input pipe 8. The end of the gas input pipe 8 extending into the bleaching tank 2 is connected to the first dispersion plate 9. The bleaching tank 2 is connected to the pulverizing tank 3 through the straight pipe 10. The end of the straight pipe 10 extending into the pulverizing tank 3 is connected to the second dispersion plate 11. Both the first dispersion plate 9 and the second dispersion plate 11 are provided with several dispersion holes. The bleaching tank 2 is connected to the corona ozone generating equipment through the gas input pipe 8. The first dispersion plate 9 at the end of the gas input pipe 8 disperses the ozone into tiny bubbles, increasing the contact area between the ozone and hydrogen peroxide and enhancing the synergistic disinfection effect. The second dispersion plate 11 at the end of the straight pipe 10 injects ozone into the pulverizing tank 3 in a turbulent manner, forming a directional airflow through the dispersion holes, while simultaneously turning over the waste paper to ensure that the ozone penetrates evenly into the fiber to kill microorganisms and avoid local disinfection blind spots.
[0023] In a preferred embodiment, the present invention may be further configured as follows: Figure 1 , Figure 4 As shown; the sealed evacuation assembly 5 includes: Hydraulic push rod 51 is fixed on frame 1, with its output end facing crushing tank 3; The fixed frame 52 is connected to the output end of the hydraulic push rod 51 and can be driven by it to make vertical displacement; The connecting shaft 53 passes through the fixed frame 52 and is rotatably connected to it; The sealing cover 54 is connected to the end of the connecting shaft 53, and the end away from the connecting shaft 53 has a recessed operating area; The sealing element 55 is disposed on the outside of the sealing cover 54 and is used to form a sealing contact with the inner wall of the pulverizing tank 3; The negative pressure pipeline 56 is connected to the pulverizing tank 3. The negative pressure pipeline 56 is also equipped with a negative pressure suction check valve and a first filter screen, which are used to remove gas from the pulverizing tank 3. The hydraulic push rod 51 drives the fixing frame 52 to move vertically, which drives the sealing cover 54 to cover the opening of the pulverizing tank 3. The sealing element 55 forms an airtight contact with the inner wall of the tank. The sealing element 55 is preferably a rubber ring. The negative pressure pipeline 56 is connected to an external vacuum pump. The nitrogen in the tank is continuously removed through the negative pressure suction check valve and the first filter screen. In conjunction with ozone injection, a low-nitrogen environment is formed to inhibit the reaction between ozone and nitrogen and improve the purity of ozone. At the same time, the recessed operating area of the sealing cover 54 provides working space for the pulverizing component 6 to ensure that the pulverizing process is carried out in a closed environment.
[0024] In a preferred embodiment, the present invention may be further configured as follows: Figure 2 , Figure 3 As shown; the connecting shaft 53 includes: A drive shaft 531 passes through and is rotatably connected to a fixed frame 52; A sleeve 532 is fitted onto the outside of the drive shaft 531 and fixedly connected to the sealing cover 54. The drive shaft 531 can rotate axially at the center of the sleeve 532, and the sleeve 532 has an installation space inside. A through hole is opened at the center of the sleeve 532, and a bearing is installed in the through hole. The rotating shaft and the inner ring of the bearing are fixedly connected to each other. The purpose of the bearing is to ensure that the drive shaft 531 will not drive the sealing cover 54 to rotate during rotation. The drive shaft 531 passes through the fixing frame 52 and is connected to the sleeve 532 through the bearing. When the drive shaft 531 rotates, the sleeve 532 and the sealing cover 54 remain stationary to avoid wear of the seal 55 due to rotation. The installation space inside the sleeve 532 is used to accommodate components such as the electric push rod 65. At the same time, the sleeve 532 is fixedly connected to the sealing cover 54 to ensure that the hydraulic push rod 51 can drive the sleeve 532 and the sealing cover 54 to move vertically together when it drives the fixing frame 52.
[0025] In a preferred embodiment, the present invention may be further configured as follows: Figure 2 , Figure 5 As shown; the crushing component 6 includes: The drive motor 61 is fixed on the mounting bracket 52, and its output end is connected to the drive shaft 531. Prism 62 is connected to the end of drive shaft 531; The drive shaft 63 is sleeved on the outside of the prism 62 and forms a sliding connection with the prism 62. The drive shaft 63 passes through the sealing cover 54 and extends into its operating area. Multiple first crushing blades 64 are arranged in a ring on the outer side of the transmission shaft 63 located within the operating area; The electric push rod 65 is fixed to the sealing cover 54 and located within the installation space; A sliding seat 66 is fitted outside the drive shaft 63 and connected to the output end of the electric push rod 65. The drive shaft 63 can rotate within the sliding seat 66. The electric push rod 65 drives the sliding seat 66 to move the drive shaft 63 axially, thereby adjusting the position of the first shredder 64 in the operating area. A bearing is provided at the center of the sliding seat 66, and the drive shaft 63 is connected to the inner ring of the bearing. The bearing is provided to ensure that the drive shaft 63 does not rotate along with the sliding seat 66 during rotation. The drive motor 61 drives the prism 62 to rotate through the drive shaft 531. The drive shaft 63 is slidably connected to the prism 62. The electric push rod 65 drives the sliding seat 66 to move axially, adjusting the extension length of the drive shaft 63, thereby changing the position of the first shredder 64 in the operating area. The sliding fit between the prism 62 and the drive shaft 63 allows the blade to adjust its position while rotating and shredding, adapting to the shredding needs of different waste paper and improving shredding efficiency.
[0026] In a preferred embodiment, the present invention may be further configured as follows: Figure 1 , Figure 4 As shown; the sealing cover 54 is connected to the pulping tank 4 via the conveying hose 12 that passes through the pulverizing tank 3, and is used to convey the shredded paper powder in the pulverizing tank 3 to the pulping tank 4 under the action of ozone gas flow. The pulping tank 4 is connected to the input pipe of the corona ozone generating equipment via the gas output pipe 13. The gas output pipe 13 is equipped with a second filter screen 14. The pulping tank 4 is also equipped with a water inlet pipe 15 to continuously inject water into the pulping tank 4. The sealing cover 54 is connected to the pulping tank 4 via the conveying hose 12. The ozone gas flow blows the shredded paper powder to the pulping tank 4 and mixes it with the water injected by the water inlet pipe 15. The oxygen reduced after the reaction in the pulping tank 4 flows back to the corona ozone generating equipment via the gas output pipe 13. The second filter screen 14 filters the shredded paper to prevent it from entering the input end of the corona ozone generating equipment, realizing gas recycling and reducing ozone consumption and gas emissions.
[0027] In a preferred embodiment, the present invention may be further configured as follows: Figure 3 , Figure 4 As shown; the pulping tank 4 and the bleaching tank 2 are connected by a pulp conveying pipe 16. The pulp conveying pipe 16 is equipped with a hydrogen peroxide injection branch pipe 17 with a one-way valve. The pulping tank 4 has a conical structure with a top diameter larger than the bottom diameter. The top diameter of the conical structure of the pulping tank 4 is larger than the bottom diameter, which uses gravity to accelerate the settling of the pulp and promote the mixing of fiber and water. The hydrogen peroxide injection branch pipe 17 on the pulp conveying pipe 16 replenishes hydrogen peroxide before the pulp is discharged into the bleaching tank 2 to enhance the disinfection effect. The one-way valve prevents the pulp from flowing back. The conical design also optimizes the fluid flow in the pulping tank 4 and reduces the pulp retention in the pulping tank 4.
[0028] In a preferred embodiment, the present invention may be further configured as follows: Figure 4 , Figure 6 As shown; the pulp preparation component 7 includes: A rotating shaft 71 is located at the center of the pulping tank 4 and can rotate around it; Synchronous drive mechanism 72 connects rotating shaft 71 and drive shaft 531, and is used to drive the two to rotate synchronously; Baffle 73 is installed inside the pulping tank 4, dividing its interior into a mixing zone and a discharge zone; The mixing cylinder 74 is fixed on the partition plate 73 and located in the mixing zone. Its side wall is provided with a number of circumferentially distributed through holes 75 for connecting the fluid inside and outside the mixing cylinder 74. The shearing mechanism 76 is located outside the rotating shaft 71 and is used to mix the shredded paper powder with water in the mixing cylinder to make pulp and refine the fibers. Solenoid valve 77, located on partition 73, controls the pulp flow between mixing zone and discharge zone. Synchronous drive mechanism 72 transmits the rotation of drive shaft 531 to rotating shaft 71, causing them to rotate synchronously. Through hole 75 on the side wall of mixing cylinder 74 allows bidirectional fluid flow. Shearing mechanism 76 generates shearing force to refine fibers. After pulping, the pulp flow is controlled by solenoid valve 77 to allow the pulp in mixing zone to flow into discharge zone, and finally into bleaching tank 2 through pulp conveying pipe 16.
[0029] In a preferred embodiment, the present invention may be further configured as follows: Figure 1 , Figure 4 As shown; the synchronous drive mechanism 72 includes: A transmission frame 721 is fixed to the drive shaft 531 and rotates synchronously with it. An external gear ring 722 is fixedly installed on the outer side of the transmission frame 721. The meshing gear 723 is fixed to the end of the rotating shaft 71 and meshes with the external gear ring 722 to achieve synchronous rotation of the two. The transmission frame 721 rotates synchronously with the drive shaft 531. The external gear ring 722 meshes with the meshing gear 723 to transmit the rotation of the drive shaft 531 to the rotating shaft 71. There is no need to set up a corresponding drive mechanism. This gear transmission structure ensures stable power transmission and avoids the slippage problem of belt or chain transmission.
[0030] In a preferred embodiment, the present invention may be further configured as follows: Figure 6 , Figure 7 As shown; the shearing mechanism 76 includes: Axial flow fan blade 761 is fixed to the outside of rotating shaft 71 and is used to drive the shredded paper powder in pulp tank 4 into mixing cylinder 74; Multiple rotating blade holders 762 are equidistantly distributed and fixedly connected along the axial direction of the rotation axis 71, and a second crushing blade group 763 is provided on the outer circumferential side of each rotating blade holder 762; Multiple fixed blade holders 764 are fixed to the inner wall of the mixing cylinder 74, corresponding one-to-one with the rotating blade holders 762. Each fixed blade holder 764 has a third shredder group 765 inside. When the second shredder group 763 rotates with the rotating shaft 71, it forms a shearing engagement with the third shredder group 765 to mix the shredded paper powder with water to make pulp and refine the fibers. The axial flow fan blades 761 drive the shredded paper powder in the pulping tank 4 to move into the mixing cylinder 74. The rotating blade holder 762 forms a shearing engagement with the second shredder group 763 and the third shredder group 765 on the fixed blade holders 764. Under the drive of the rotating shaft 71, the fibers are cut and refined in multiple stages. At the same time, ozone fully contacts the fibers during the shearing process, inhibits the reproduction of microorganisms, and improves the quality of pulp.
[0031] The specific working principle of the sterilization device for clean papermaking raw materials of the present invention is as follows: First, the waste paper to be processed is put into the shredder 3 from the opening on the side away from the bleaching tank 2. The sealed vacuum assembly 5 on the frame 1 is activated. The hydraulic push rod 51 drives the fixed frame 52 to move vertically, which causes the sealing cover 54 at the end of the connecting shaft 53 to cover the opening of the shredder 3. The sealing element 55 forms an airtight contact with the inner wall of the tank. Through the compression of the sealing cover 54, the gas in the gaps of the waste paper can be discharged. Through the action of the first filter screen, the shredded paper powder in the shredder is prevented from entering the negative pressure pipeline 56. Through the action of the first one-way valve, some gas can be discharged in time to reduce the working time of the subsequent vacuum pump, so as to achieve energy saving and emission reduction, in line with the concept of clean papermaking. Meanwhile, the negative pressure pipeline 56 continuously removes nitrogen from the tank through an external vacuum pump, a negative pressure suction check valve, and a first filter screen. This ensures the purity of ozone during gas circulation and prevents nitrogen from producing nitrides in the corona ozone generator, creating a low-nitrogen environment and preventing nitrogen from reacting with ozone. Subsequently, the ozone generated by the corona ozone generator is dispersed into tiny bubbles through the first dispersion disc 9 at the end of the gas input pipe 8 and injected into the bleaching tank 2. It mixes with the hydrogen peroxide injected into the tank and is simultaneously injected into the pulverizing tank 3 in a turbulent manner through the second dispersion disc 11 at the end of the straight pipe 10. The directional airflow is formed through the dispersion holes, which both agitates the waste paper to allow ozone to penetrate the fibers evenly and kill microorganisms, and provides airflow power for the pulverizing process. In the enclosed operating area of the shredder 3, the drive motor 61 drives the prism 62 to rotate through the drive shaft 531. The transmission shaft 63 is slidably connected to the prism 62. The electric push rod 65 drives the sliding seat 66 to move axially and adjusts the extension length of the transmission shaft 63 so that the first shredder 64 distributed in a ring can shred the waste paper into paper powder. Simultaneously, ozone flow blows shredded paper powder into pulp tank 4 through delivery hose 12, where it mixes with water continuously injected through water inlet pipe 15. Pulping tank 4 is a conical structure with a top diameter larger than the bottom, using gravity to accelerate the mixing of fibers and water. Synchronous drive mechanism 72 meshes with meshing gear 723 through external gear ring 722 of transmission frame 721, transmitting the rotation of drive shaft 531 to rotating shaft 71, driving axial flow fan blades 761 to drive shredded paper powder in pulp tank 4 into mixing cylinder 74, that is, pushing pulp from the top of mixing cylinder 74 into mixing cylinder 74, and then discharging through through hole 75 at the bottom of mixing cylinder 74, so as to realize the circulation of pulp in mixing cylinder 74. The second shredding blade group 763 of rotating blade holder 762 and the third shredding blade group 765 of fixed blade holder 764 form a shearing engagement to refine fibers. Through hole 75 on the side wall of mixing cylinder 74 realizes bidirectional fluid flow. After pulping is completed; When the solenoid valve 77 is opened, the pulp flows from the mixing zone into the discharge zone. When it passes through the pulp conveying pipe 16, hydrogen peroxide is injected into the branch pipe 17 to supplement the hydrogen peroxide. Backflow is prevented by the one-way valve. Finally, it is discharged into the bleaching tank 2 to mix with the hydrogen peroxide. The synergistic effect of ozone and hydrogen peroxide is used for deep disinfection and bleaching treatment. The disinfected and bleached pulp is discharged through the pulp output pipe; Inside the pulping tank 4, the oxygen that has been reduced after the reaction is filtered for impurities by the second filter screen 14 of the gas output pipe 13 and then returned to the corona ozone generation equipment for recycling. Since the ozone is reduced to oxygen after reacting with microorganisms on the surface of waste paper, the continuous supply of ozone is ensured during the gas circulation process, reducing the energy consumption of ozone preparation and realizing an integrated process from waste paper crushing, ozone disinfection, pulping to bleaching. This solves the problems of low disinfection efficiency, high energy consumption and decline in waste paper quality caused by nitrogen interference, and simultaneously achieves the goals of resource conservation and clean production.
[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for disinfecting raw materials used in papermaking, comprising a frame (1), characterized in that, Also includes: A bleaching tank (2) is installed on the frame (1) and is also connected to a corona ozone generating device. Hydrogen peroxide is continuously injected into the bleaching tank (2). A shredder (3) is installed on the frame (1) and communicates with the bleaching tank (2), with an opening at one end away from the bleaching tank (2) for waste paper to enter; At least two pulping tanks (4) are mounted on the frame (1) and connected to the bleaching tank (2) and the crushing tank (3) respectively, and water is continuously injected into them; The sealed vacuum assembly (5) is set inside the shredding tank (3) to cover the opening of the shredding tank (3) to limit the waste paper and remove the nitrogen in the tank, and to transport the ozone generated by the corona ozone generator to the bleaching tank (2) and the shredding tank (3) to turn the waste paper and disinfect it. The shredding component (6) is set inside the shredding tank (3) to shred waste paper into paper powder and to transfer the paper powder to the pulping tank (4) to mix with water under the action of ozone flow; The pulp preparation component (7) is set in each pulping tank (4) and connected to the crushing component (6). It is used to mix shredded paper powder with water to form pulp and refine fibers. The final pulp is discharged into the bleaching tank (2) and mixed with hydrogen peroxide for disinfection and bleaching. At the same time, the gas in the pulping tank (4) that has been reduced to oxygen after participating in the reaction is returned to the corona ozone generation equipment for recycling.
2. The sterilization device for clean papermaking raw materials according to claim 1, characterized in that, The bleaching tank (2) is connected to the corona ozone generating equipment through a gas input pipe (8). The end of the gas input pipe (8) extending into the bleaching tank (2) is connected to a first dispersion plate (9). The bleaching tank (2) is connected to the pulverizing tank (3) through a straight pipe (10). The end of the straight pipe (10) extending into the pulverizing tank (3) is connected to a second dispersion plate (11). Both the first dispersion plate (9) and the second dispersion plate (11) are provided with a number of dispersion holes.
3. The sterilization device for clean papermaking raw materials according to claim 1, characterized in that, The sealed evacuation assembly (5) includes: A hydraulic push rod (51) is fixed on the frame (1), with its output end facing the crushing tank (3). The fixed frame (52) is connected to the output end of the hydraulic push rod (51) and can be driven to make vertical displacement; A connecting shaft (53) passes through the fixed frame (52) and is rotatably connected to it; A sealing cover (54) is connected to the end of the connecting shaft (53), and a recessed operating area is provided at the end away from the connecting shaft (53); A sealing element (55) is disposed on the outside of the sealing cover (54) for forming a sealing contact with the inner wall of the pulverizing tank (3); A negative pressure pipeline (56) is connected to the pulverizing tank (3). The negative pressure pipeline (56) is also equipped with a negative pressure suction check valve and a first filter screen for removing gas from the pulverizing tank (3).
4. The sterilization device for clean papermaking raw materials according to claim 3, characterized in that, The connecting shaft (53) includes: A drive shaft (531) passes through the fixed frame (52) and is rotatably connected to it; A sleeve (532) is fitted on the outside of the drive shaft (531) and fixedly connected to the sealing cover (54). The drive shaft (531) can rotate axially at the center of the sleeve (532). An installation space is provided inside the sleeve (532).
5. The sterilization device for clean papermaking raw materials according to claim 4, characterized in that, The crushing component (6) includes: A drive motor (61) is fixed on the fixed frame (52), and its output end is connected to the drive shaft (531); A prism (62) is connected to the end of the drive shaft (531); A drive shaft (63) is sleeved on the outside of the prism (62) and forms a sliding connection with the prism (62). The drive shaft (63) passes through the sealing cover (54) and extends into its operating area. Multiple first crushing blades (64) are arranged in a ring on the outer side of the drive shaft (63) within the operating area; An electric push rod (65) is fixed to the sealing cover (54) and located within the installation space; A sliding seat (66) is sleeved on the outside of the drive shaft (63) and connected to the output end of the electric push rod (65). The drive shaft (63) can rotate inside the sliding seat (66). The electric push rod (65) drives the sliding seat (66) to drive the drive shaft (63) to move axially, so as to adjust the position of the first crushing tool (64) in the operating area.
6. The sterilization device for clean papermaking raw materials according to claim 3, characterized in that, The sealing cover (54) is connected to the pulping tank (4) through the conveying hose (12) that passes through the pulverizing tank (3), and is used to transport the shredded paper powder in the pulverizing tank (3) to the pulping tank (4) under the action of ozone flow. The pulping tank (4) is connected to the input pipe of the corona ozone generating equipment through the gas output pipe (13). The gas output pipe (13) is provided with a second filter screen (14). The pulping tank (4) is also provided with a water inlet pipe (15) to continuously inject water into the pulping tank (4) through the water inlet pipe (15).
7. A sterilization device for clean papermaking raw materials according to claim 4, characterized in that, The pulping tank (4) and the bleaching tank (2) are connected by a pulp conveying pipe (16). The pulp conveying pipe (16) is equipped with a hydrogen peroxide injection branch pipe (17) with a one-way valve. The pulping tank (4) is a conical structure with a top diameter greater than the bottom diameter.
8. A sterilization device for clean papermaking raw materials according to claim 7, characterized in that, The pulp preparation component (7) includes: A rotating shaft (71) is located at the center of the pulping tank (4) and can rotate around it; A synchronous drive mechanism (72) connects the rotating shaft (71) and the drive shaft (531) to drive them to rotate synchronously; A baffle (73) is installed inside the pulping tank (4) to divide its interior into a mixing zone and a discharge zone; The mixing cylinder (74) is fixed on the partition plate (73) and located in the mixing zone. Its side wall is provided with a number of circumferentially distributed through holes (75) for connecting the fluid inside and outside the mixing cylinder (74). The shearing mechanism (76) is located outside the rotating shaft (71) and is used to mix the shredded paper powder in the mixing cylinder with water to make pulp and refine the fibers. A solenoid valve (77) is disposed on the partition (73) for controlling the pulp flow between the mixing zone and the discharge zone.
9. A sterilization device for clean papermaking raw materials according to claim 8, characterized in that, The synchronous drive mechanism (72) includes: A transmission frame (721) is fixed to the drive shaft (531) and rotates synchronously with it. An external gear ring (722) is fixedly installed on the outside of the transmission frame (721). The meshing gear (723) is fixed to the end of the rotating shaft (71) and meshes with the external gear ring (722) to achieve synchronous rotation of the two.
10. A sterilization device for clean papermaking raw materials according to claim 8, characterized in that, The shearing mechanism (76) includes: Axial flow fan blades (761) are fixed to the outside of the rotating shaft (71) and are used to drive the shredded paper powder in the pulping tank (4) into the mixing cylinder (74); Multiple rotating blade holders (762) are equidistantly distributed and fixedly connected along the axial direction of the rotating shaft (71), and a second crushing blade group (763) is provided on the outer circumferential side of each rotating blade holder (762). Multiple fixed blade holders (764) are corresponding one-to-one with the rotating blade holder (762) and fixed to the inner wall of the mixing cylinder (74). Each fixed blade holder (764) has a third shredding blade group (765) on its inner side. When the second shredding blade group (763) rotates with the rotating shaft (71), it forms a shearing engagement with the third shredding blade group (765) to mix the shredded paper powder with water to make pulp and refine the fibers.