Efficient and energy-saving eccentric hydrapulper

Abstract

The invention relates to an efficient energy-saving eccentric hydrapulper which comprises a barrel groove support, a groove body, a rotor, a driving motor and a base, the groove body is arranged on the barrel groove support, a pulp receiving chamber is arranged at the bottom of the groove body, a sieve plate is arranged between the pulp receiving chamber and the groove body, the rotor is eccentrically arranged in the groove body, an impeller is installed on the rotor, and the driving motor is arranged on the base. A gap is formed between the impeller and the sieve plate, the driving motor is installed on the base and comprises a motor shaft, and the motor shaft is connected with the rotor through a coupler; the pulping device has the advantages that the rotor is eccentrically arranged in the tank body, so that a certain eccentric distance exists between the rotor and the central shaft of the tank body, the eccentrically arranged rotor can enable the distribution of pulping energy in the tank body to be more uniform, the situation that local pulping energy is too high or too low can be effectively avoided, enough pulping energy can be generated at a relatively low rotating speed, and the pulping efficiency is improved. Therefore, the pulping efficiency is improved, and the energy consumption is also reduced.

Description

Technical Field

[0001] This invention relates to a high-efficiency and energy-saving eccentric hydraulic pulper. Background Technology

[0002] Hydraulic pulpers are one of the core pieces of equipment in the pulp and paper industry, especially in the process of waste paper recycling. Their main function is to use hydraulic shearing to rapidly break down raw materials such as dry pulp boards, waste paper, and paperboard into individual fibers in water, while simultaneously separating most non-fiber impurities, thus preparing a uniform pulp suspension for subsequent screening, purification, and bleaching processes.

[0003] During operation, a hydraulic pulper rapidly mixes raw materials with water as the rotor rotates. The pulp is ejected at high speed from the outer periphery of the impeller, rising along the tank wall. Simultaneously, a suction head at the center of the impeller draws the pulp from above into the center, and this cycle repeats continuously, maintaining both high-speed rotation and up-and-down movement of the pulp. In this intense cyclical pulping process, the pulp sheets, damaged paper, or waste paper fed into the pulper's tank undergo powerful shearing, tearing, and rubbing effects under the combined influence of hydraulic impact shearing, mechanical tearing by the impeller, and mechanical dispersal between the impeller and the screen plate. This ensures the paper sheets in the tank are thoroughly broken down and ultimately separated into fibers. Currently, rotors are primarily mounted in a center-mounted configuration, driven by either conventional motors or variable frequency motors. To maintain the eddy current intensity required for pulp circulation during operation, center-mounted rotors require higher power drives, thus increasing energy consumption. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of high energy consumption in existing centrifugally mounted rotors during hydraulic pulping. It proposes a high-efficiency, energy-saving eccentric hydraulic pulper. By eccentrically mounting a rotor within the tank, a certain eccentricity exists between the rotor and the central axis of the tank. This eccentric rotor ensures a more uniform distribution of pulping energy within the tank, effectively preventing localized excessively high or low pulping energy. Sufficient pulping energy can be generated at lower speeds, thereby improving pulping efficiency and reducing energy consumption.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a high-efficiency and energy-saving eccentric hydraulic pulper, comprising a tank support, a tank body, a rotor, a drive motor, and a base. The tank body is mounted on the tank support, and a pulp receiving chamber is provided at the bottom of the tank body. A screen plate is provided between the pulp receiving chamber and the tank body. The rotor is eccentrically mounted in the tank body, and an impeller is mounted on the rotor. A gap is provided between the impeller and the screen plate. The drive motor is mounted on the base, and the drive motor includes a motor shaft, which is connected to the rotor through a coupling.

[0006] Preferably, the distance between the vertical axis of the rotor and the vertical axis of the slot is L, and L = 350~370mm.

[0007] Preferably, the impeller is provided with a locking cap, and the top of the locking cap is conical.

[0008] Preferably, the impeller is provided with a mounting groove for mounting a locking cap, the bottom end of the locking cap is provided with a boss that matches the inner wall of the impeller, and the bottom end of the boss abuts against the top end of the rotor, and a sealing ring is provided between the boss and the impeller.

[0009] Preferably, the outer wall of the tank is provided with an interface for installing a level gauge, and the interface is inclined on the outer wall of the tank. The top of the tank is provided with a packer.

[0010] Preferably, the bottom end of the tank is provided with a cleaning port, and a sealing plate is provided on the cleaning port, and the sealing plate is detachably installed on the tank.

[0011] Preferably, the bottom end of the tank is connected to a cooling water pipe and a flushing water pipe, and both the cooling water pipe and the flushing water pipe are equipped with control valves.

[0012] Preferably, the base includes a lower mounting plate and an upper mounting plate disposed on the lower mounting plate, the drive motor is mounted on the upper mounting plate, the lower mounting plate is provided with mounting holes, the base is mounted on the ground through the mounting holes, and the base is an integral structure.

[0013] Preferably, the drive motor is a permanent magnet motor.

[0014] Preferably, the tank support includes a support column, a support plate, and an annular connecting plate. The bottom end of the support plate is fixedly installed on the top end of the annular connecting plate, and the top end of the support plate is connected to the tank body. The top end of the support column is fixedly installed on the bottom end of the annular connecting plate, and the bottom end of the support column is provided with a base plate connected to a concrete base.

[0015] In summary, the advantages of this invention are as follows: By eccentrically positioning the rotor within the tank, a certain eccentricity exists between the rotor and the central axis of the tank. This causes the distance between the rotor and the inner wall of the tank to change at different positions during rotation, generating a strong hydraulic effect. Due to the eccentric rotation of the rotor, a complex water flow pattern is formed within the tank. Near the rotor, water and slurry are driven into circular motion. Furthermore, due to the eccentricity, the speed and direction of the water flow constantly change at different positions, generating strong eddies and turbulence, ensuring thorough agitation of the slurry fibers in the water. Secondly, because the rotor is equipped with an impeller, relative motion exists between the impeller and the slurry during rotor rotation, generating shear force on the slurry fibers. In addition to the circumferential shear force, the fibers also continuously collide and rub against the rotor, the inner wall of the tank, and other fibers due to the radial force generated by the eccentric rotation. This helps to break down fiber bundles into individual fibers and can cut excessively long fibers, achieving the purpose of pulping and improving pulping quality. Furthermore, the eccentrically positioned rotor allows for a more uniform distribution of pulping energy within the tank, effectively... To avoid situations where pulping energy is too high or too low in certain areas, this machine generates sufficient pulping energy at a lower speed compared to existing centrifugal pulpers, thus improving pulping efficiency and reducing energy consumption. The placement of the receiving chamber and screen plate allows for fiber and impurity separation, improving pulp quality. Finally, the motor shaft of the drive motor is connected to the rotor via a coupling, achieving direct drive between the motor and rotor. This eliminates the reducer component in traditional transmission systems, making the entire transmission more compact and reducing vibration and noise caused by wear, loosening, or resonance of transmission components. This improves the stability of the pulper's operation, reduces the probability of malfunctions, extends the equipment's trouble-free operating time, and increases production efficiency and equipment lifespan. Mounting the drive motor on the base simplifies the overall layout, reduces floor space, lowers overall weight, and reduces raw material usage and manufacturing costs. Furthermore, the lightweight equipment is easier to transport and install, reducing logistics costs and installation difficulty, further improving the company's economic benefits and production efficiency. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the high-efficiency and energy-saving eccentric hydraulic pulper of the present invention; Figure 2 for Figure 1 A partial magnification of I; Figure 3 This is a partial schematic diagram of the tank body in this invention; Figure 4 This is a schematic diagram of the base structure in this invention.

[0017] Figure label: 1. Tank support, 11. Support column, 12. Support plate, 13. Annular connecting plate, 14. Bottom plate, 2. Tank body, 21. Interface, 22. Cleaning port, 23. Sealing plate, 24. Cooling water pipe, 25. Flushing water pipe, 26. Control valve, 27. Unpacker, 3. Rotor, 4. Drive motor, 41. Motor shaft, 42. Coupling, 5. Base, 51. Lower mounting plate, 52. Upper mounting plate, 53. Mounting hole, 6. Impeller, 60. Lock cap, 61. Mounting groove, 62. Boss, 7. Slurry receiving chamber, 8. Screen plate, 9. Sealing ring. Detailed Implementation

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a high-efficiency and energy-saving eccentric hydraulic pulper includes a tank support 1, a tank body 2, a rotor 3, a drive motor 4, and a base 5. The tank body 2 is mounted on the tank support 1, and a pulp receiving chamber 7 is provided at the bottom of the tank body 2. A screen plate 8 is provided between the pulp receiving chamber 7 and the tank body 2. The rotor 3 is eccentrically located inside the tank body 2, and an impeller 6 is mounted on the rotor 3. A gap is provided between the impeller 6 and the screen plate 8. The drive motor 4 is mounted on the base 5, and the drive motor 4 includes a motor shaft 41. The motor shaft 41 is connected to the rotor 3 through a coupling 42.

[0019] By using a rotor 3 eccentrically positioned within the tank 2, a certain eccentricity exists between the rotor 3 and the central axis of the tank 2. This causes the distance between the rotor 3 and the inner wall of the tank 2 to change at different positions during rotation, generating a strong hydraulic effect. Due to the eccentric rotation of the rotor 3, a complex water flow pattern is formed within the tank 2. Near the rotor 3, water and slurry are driven into circular motion. Furthermore, due to the eccentricity, the speed and direction of the water flow constantly change at different positions, generating strong eddies and turbulence. This ensures that the slurry fibers are thoroughly agitated in the water. Secondly... Because the impeller 6 is installed on the rotor 3, there is relative motion between the impeller 6 and the pulp during the rotation of the rotor 3. This generates shear force on the pulp fibers. In addition to the circumferential shear force, the fibers also continuously collide and rub against the rotor 3, the inner wall of the tank 2, and other fibers due to the radial force generated by the eccentric rotation. This helps to break down the fiber bundle into individual fibers and can cut off excessively long fibers, achieving the purpose of pulping and improving pulping quality. In addition, the eccentrically arranged rotor 3 can make the pulping energy distribution more uniform in the tank 2, effectively avoiding localized... In cases where pulping energy is too high or too low, compared to existing centrifugal pulpers, sufficient pulping energy can be generated at a lower speed, thereby improving pulping efficiency and reducing energy consumption. The arrangement of the receiving chamber 7 and the screen plate 8, through which the screen plate 8 separates fibers from impurities, improves pulp quality. Finally, the motor shaft 41 of the drive motor 4 is connected to the rotor 3 through the coupling 42, thus realizing direct drive transmission between the drive motor 4 and the rotor 3. The reducer component in the traditional transmission system is eliminated, making the entire transmission more compact and reducing vibration and noise caused by wear, loosening, or resonance of transmission components. This improves the stability of the pulper's operation, reduces the probability of failure, extends the equipment's trouble-free operating time, and improves production efficiency and equipment lifespan. Placing the drive motor 4 on the base 5 makes the overall layout simpler and reduces the floor space. This not only reduces the overall weight but also reduces the use of raw materials and manufacturing costs. In addition, the lightweight equipment is more convenient to transport and install, reducing logistics costs and installation difficulty, further improving the company's economic benefits and production efficiency.

[0020] The distance between the vertical axis of the rotor 3 and the vertical axis of the tank 2 is L, and L = 350-370mm. Setting L to 350-370mm ensures optimal crushing efficiency and energy saving. When L is less than 350mm, it may lead to insufficient slurry eddy current intensity, poor impurity settling effect, and decreased crushing efficiency. When L is greater than 370mm, due to excessive eccentricity, it can easily lead to flow field imbalance, excessive local impact, increased vibration, increased energy consumption, and shortened lifespan of key components. The impeller 6 is provided with a locking cap 60. The top of the locking cap 60 is conical, which can prevent the slurry from leaking between the impeller 6 and the rotor 3, effectively protecting the impeller 6 and the rotor 3, and improving the overall service life. Setting the top of the locking cap 60 to be conical can improve the locking quality of the locking cap 60 and ensure that the impeller 6 remains fixed under high-speed rotation or complex working conditions. The impeller 6 is provided with a mounting groove 61 for mounting a locking cap 60. The bottom end of the locking cap 60 is provided with a boss 62 that mates with the inner wall of the impeller 6, and the bottom end of the boss 62 abuts against the top end of the rotor 3. A sealing ring 9 is provided between the boss 62 and the impeller 6. The mounting groove 61 and the sealing ring 9 can form a seal between the locking cap 60 and the impeller 6, achieving a double seal in both the horizontal and vertical directions, improving the sealing effect between the locking cap 60 and the impeller 6, preventing slurry from entering the rotor 3 during operation, and improving the service life of the rotor 3. In this embodiment, the locking cap 60 is fixedly mounted on the impeller 6 with screws to prevent the locking cap 60 from falling off during operation and improve the fixing quality of the locking cap 60.

[0021] The outer wall of the tank 2 is provided with an interface 21 for installing a level gauge, and the interface 21 is inclined on the outer wall of the tank 2. The setting of the interface 21 facilitates the installation of the level gauge, thereby realizing the monitoring of the liquid level in the tank 2 and facilitating the inspection and maintenance of the level gauge. Secondly, setting the interface 21 and the outer wall of the tank 2 at an inclination can make the level gauge probe in a relatively stable position after installation, improving the accuracy of measurement. In addition, it can make the level gauge probe avoid the high turbulence zone, reduce the physical damage to the sensor caused by slurry impact, and improve the service life of the level gauge. The top of the tank 2 is equipped with a depacker 27. The depacker 27 enables continuous automatic depacking and shredding of waste paper raw materials, thereby improving production efficiency, reducing manual intervention and optimizing space utilization. Specifically, the depacker 27 is existing technology and will not be described in detail in this embodiment. The installation position of the depacker 27 can be adjusted according to different shredding requirements. The top of the tank 2 is equipped with a mounting frame for installing the depacker 27. The mounting frame is installed on the inner side wall of the tank 2 by bolt assembly, which improves the installation strength of the mounting frame.

[0022] The bottom end of the tank 2 is provided with a cleaning port 22, and a sealing plate 23 is provided on the cleaning port 22. The sealing plate 23 is detachably installed on the tank 2. The cleaning port 22 is provided to facilitate the cleaning of the accumulated material at the bottom of the tank 2, and to avoid the impact of slurry caking on the slurry breaking efficiency or forced shutdown. The sealing plate 23 can achieve the sealing of the cleaning port 22. In order to improve the sealing effect, a sealing ring 9 or a rubber gasket can be provided on the sealing plate 23 to ensure that the slurry will not seep out from the cleaning port 22 during operation. In this embodiment, the tank 2 is provided with a flange connected to the sealing plate 23. The sealing plate 23 is detachably installed on the flange by fasteners, and the overall installation and disassembly are convenient. The bottom of the tank 2 is connected to a cooling water pipe 24 and a flushing water pipe 25, respectively. Both the cooling water pipe 24 and the flushing water pipe 25 are equipped with control valves 26. During the pulping process, a large amount of heat is generated due to the crushing of materials and mechanical movement. Therefore, the cooling water is circulated through the cooling water pipe 24 to dissipate heat, which can effectively prevent overheating and ensure that the entire pulping process operates at a normal temperature, thus extending the service life of the entire high-efficiency and energy-saving eccentric hydraulic pulper. In addition, during the pulping process, some impurities and residual pulp may accumulate in the tank 2. Therefore, the flushing water pipe 25 is used to flush the tank 2, thereby ensuring the cleanliness of the inside of the tank 2. This not only helps to improve pulping efficiency but also prevents impurities from damaging the equipment. Furthermore, regular flushing can reduce overall maintenance costs and ensure long-term stable operation. Secondly, the control valves 26 can control the water flow of the cooling water pipe 24 and the flushing water pipe 25 respectively, improving the cooling quality and flushing effect.

[0023] The base 5 includes a lower mounting plate 51 and an upper mounting plate 52 disposed on the lower mounting plate 51. The drive motor 4 is mounted on the upper mounting plate 52. The lower mounting plate 51 is provided with mounting holes 53. The base 5 is mounted on the ground through the mounting holes 53. The base 5 is an integral structure. By setting the base 5 into a structure of lower mounting plate 51 and upper mounting plate 52, since the drive motor 4 is mounted on the upper mounting plate 52 and the lower mounting plate 51 is provided with mounting holes 53, the base 5 and the drive motor 4 are installed independently and will not cause spatial interference. This greatly improves the installation quality of the drive motor 4 and the base 5, and facilitates subsequent inspection and maintenance. In this embodiment, the drive motor 4 is provided with a flange seat, which is installed on the upper mounting plate 52 by bolts. Finally, setting the base 5 into an integral structure can improve the installation strength of the entire base 5, avoid the separation of the lower mounting plate 51 and the upper mounting plate 52 during operation, and simplify the installation process between the lower mounting plate 51 and the upper mounting plate 52. The drive motor 4 is a permanent magnet motor. By setting the drive motor 4 as a permanent magnet motor, the high efficiency of the permanent magnet motor itself, the magnetic field generated by the permanent magnet, and the lack of excitation current, the excitation loss is reduced, which significantly improves the efficiency of the entire drive motor 4 and greatly reduces energy consumption. During the overall operation, the permanent magnet motor can accurately adjust the output power according to the actual load demand, avoiding the energy waste caused by poor matching between the motor and the load in the traditional transmission method. Specifically, when running at low load, the permanent magnet motor can automatically reduce power consumption, while when pulping at high load, it can provide sufficient power in time, which significantly reduces the energy consumption of the entire pulping process, thereby achieving energy saving effect.

[0024] The tank support 1 includes a support column 11, a support plate 12, and an annular connecting plate 13. The bottom end of the support plate 12 is fixedly installed on the top end of the annular connecting plate 13, and the top end of the support plate 12 is connected to the tank body 2. The top end of the support column 11 is fixedly installed on the bottom end of the annular connecting plate 13, and the bottom end of the support column 11 is provided with a base plate 14 connected to a concrete base. Setting the tank support 1 with a structure of support column 11, support plate 12, and annular connecting plate 13 can improve the overall support strength of the tank support 1 and reduce the risk of deformation. The number of support columns 11 and support plates 12 installed on the annular connecting plate 13 is the same, such as four, five, or six. In this embodiment, six is ​​preferred to improve the overall strength. Firstly, to increase the strength, a base plate 14 connected to the concrete base is provided at the bottom end of the support column 11. This increases the contact area between the support column 11 and the concrete base, improves the overall stress area, and thus reduces the pressure of the entire high-efficiency energy-saving eccentric hydraulic pulverizer on the concrete base, preventing cracking of the concrete base. Specifically, the concrete base is provided with anchor bolts, and the base plate 14 is provided with mounting holes 53. During installation, simply align the mounting holes 53 with the anchor bolts and then tighten them with lock nuts to achieve the connection between the base plate 14 and the concrete base. The overall installation and disassembly are convenient and the connection is reliable. In this embodiment, the concrete base is set on the ground, so that the mounting plane of the base 5 is lower than the mounting plane of the base plate 14.

[0025] In addition to the preferred embodiments described above, there are other embodiments of the present invention. Those skilled in the art can make various changes and modifications based on the present invention, and all such changes and modifications should fall within the scope defined by the appended claims, as long as they do not depart from the spirit of the present invention.

Claims

1. A high-efficiency and energy-saving eccentric hydraulic pulper, comprising a tank support, a tank body, a rotor, and a drive motor, wherein the tank body is mounted on the tank support, characterized in that: It also includes a base, a slurry receiving chamber at the bottom of the tank, a sieve plate between the slurry receiving chamber and the tank, an eccentrically mounted rotor inside the tank, an impeller mounted on the rotor, and a gap between the impeller and the sieve plate, and a drive motor mounted on the base, the drive motor including a motor shaft, the motor shaft being connected to the rotor via a coupling.

2. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 1, characterized in that: The distance between the vertical axis of the rotor and the vertical axis of the slot is L, and L = 350~370mm.

3. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 1, characterized in that: The impeller is provided with a locking cap, the top of which is conical.

4. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 3, characterized in that: The impeller is provided with a mounting groove for mounting a lock cap. The bottom end of the lock cap is provided with a boss that matches the inner wall of the impeller, and the bottom end of the boss abuts against the top end of the rotor. A sealing ring is provided between the boss and the impeller.

5. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 1, characterized in that: The outer wall of the tank is provided with an interface for installing a level gauge, and the interface is set at an angle on the outer wall of the tank. The top of the tank is provided with a packer.

6. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 1, characterized in that: The bottom end of the tank is provided with a cleaning port, and a sealing plate is provided on the cleaning port, and the sealing plate is detachably installed on the tank.

7. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 1, characterized in that: The bottom of the tank is connected to a cooling water pipe and a flushing water pipe, and both the cooling water pipe and the flushing water pipe are equipped with control valves.

8. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 1, characterized in that: The base includes a lower mounting plate and an upper mounting plate disposed on the lower mounting plate. The drive motor is mounted on the upper mounting plate. The lower mounting plate is provided with mounting holes. The base is mounted on the ground through the mounting holes, and the base is an integral structure.

9. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 8, characterized in that: The drive motor is a permanent magnet motor.

10. The high-efficiency and energy-saving eccentric hydraulic pulper according to claim 8, characterized in that: The tank support includes a support column, a support plate, and an annular connecting plate. The bottom end of the support plate is fixedly installed on the top end of the annular connecting plate, and the top end of the support plate is connected to the tank body. The top end of the support column is fixedly installed on the bottom end of the annular connecting plate, and the bottom end of the support column is provided with a base plate connected to a concrete base.

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