Pulping device

Abstract

The utility model discloses a slurrying device, relates to slurrying equipment technical field, the slurrying device includes circulation tank, rotor pump, slurrying machine and stirring mechanism, circulation tank is provided with stirring chamber, stirring chamber is used for holding slurry, circulation tank is also provided with first feed port and first discharge port that are communicated with stirring chamber, and the first feed port and the first discharge port are communicated with stirring chamber. A second feeding hole is formed in the upper part of the rotor pump, a second discharging hole is formed in the lower part of the rotor pump, and the pulping machine is provided with a third feeding hole and a third discharging hole. According to the technical scheme, the first discharging port of the circulating tank is directly connected with the second feeding port of the rotor pump, so that the overall pipeline length and the number of elbows of the pulping device are reduced, the flowing characteristic of pulp is improved, the possibility of pulp deposition and blockage is reduced, the energy consumption required by the rotor pump for conveying the pulp is reduced, and the production cost is reduced. The rotor pump can suck slurry with high solid content and high viscosity more conveniently, the slurry making efficiency is improved, and the slurry making device is more simplified in structure and easier to install, check and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of pulping equipment, in particular to a pulping device. Background Art

[0002] With the development of lithium battery technology, in order to save energy and improve production efficiency, lithium battery slurry is developing towards solvent-free or low-solvent direction. The solid content of the slurry is getting higher and higher, resulting in higher and higher viscosity. The existing circulating pulping system cannot adapt to ultra-high viscosity conditions, which restricts the function of the equipment and limits the application of this type of equipment in the field of lithium battery pulping.

[0003] In particular, the graphite slurry for the negative electrode of lithium batteries needs to be stirred under high viscosity conditions to fully wet the deionized water and graphite. The existing circulating pulping system can only adapt to pulping under a viscosity condition of 100,000cp, while the viscosity of the negative electrode pulping is 500,000cp~1,000,000cp. The existing circulating pulping system cannot meet the needs of negative electrode pulping, which seriously restricts the use of this equipment in negative electrode pulping.

[0004] Therefore, how to design a circulating pulping system for high solid content and high viscosity working conditions is a problem that needs to be solved urgently. Utility Model Content

[0005] The main purpose of the utility model is to provide a pulping device, aiming to solve the problem of how to design a circulating pulping system for high solid content and high viscosity working conditions.

[0006] To achieve the above-mentioned purpose, the utility model proposes a pulping device, which includes a circulation tank, a rotor pump, a pulping machine and a stirring mechanism. The circulation tank is provided with a stirring chamber, which is used to accommodate slurry. The circulation tank is also provided with a first feed port and a first discharge port connected to the stirring chamber. The first feed port is located at the upper part or side of the circulation tank, the upper part of the rotor pump is provided with a second feed port, and the lower part is provided with a second discharge port, the first discharge port is directly connected to the second feed port, the pulping machine has a third feed port and a third discharge port, the second discharge port is connected to the third feed port, and the third discharge port is connected to the first feed port; the stirring mechanism can rotate relative to the circulation tank to press the slurry in the upper part of the stirring chamber down to the bottom of the stirring chamber.

[0007] In one embodiment, the stirring mechanism includes a low-speed stirring assembly, which includes a low-speed driving member and a first stirring member connected by a transmission, at least part of the body of the first stirring member is located in the stirring chamber, and the low-speed driving member can drive the first stirring member to rotate relative to the circulation tank to press the slurry in the upper part of the stirring chamber down to the bottom of the stirring chamber; the bottom of the stirring chamber is a planar structure, and the low-speed stirring assembly also includes a scraper component, and the end of the first stirring member away from the low-speed driving member is connected to the scraper component, and the scraper component is inclined relative to the bottom wall of the stirring chamber, and the low-speed driving member can drive the scraper component to rotate relative to the bottom of the stirring chamber through the first stirring member to push the slurry to move to the first discharge port.

[0008] In one embodiment, the scraper component includes a sleeve, a first scraper and a second scraper, the sleeve is sleeved on the outer wall of the first stirring member at one end away from the low-speed drive member, the first scraper and the second scraper are spaced apart along the outer periphery of the sleeve, the first scraper and the second scraper are both inclined relative to the bottom wall of the stirring chamber, and the inclination directions of the first scraper and the second scraper are opposite, the first stirring member can drive the first scraper and the second scraper to rotate relative to the bottom wall of the stirring chamber to push the slurry to move to the first discharge port.

[0009] In one embodiment, the stirring mechanism also includes a high-speed stirring assembly, which includes a high-speed driving member and a second stirring member connected by a transmission, at least part of the body of the second stirring member extends into the stirring chamber, and the high-speed driving member can drive the second stirring member to rotate relative to the circulation tank so that the slurry can move to the first discharge port.

[0010] In one embodiment, the second stirring member includes a stirring shaft and a stirring paddle, the stirring paddle includes a connecting sleeve and a blade, the stirring shaft is rotatably mounted on the circulation tank, and part of the body of the stirring shaft extends into the stirring chamber, the connecting sleeve is sleeved on the outer wall of the stirring shaft, the blade is obliquely arranged on the outer wall of the connecting sleeve, and the end of the stirring shaft away from the stirring paddle is connected to the high-speed drive member, and the high-speed drive member can drive the blade to rotate relative to the circulation tank through the stirring shaft and the connecting sleeve, so that the slurry can move to the first discharge port.

[0011] In one embodiment, the pulping machine is arranged at an angle, the third feed port is located at the lower part of the pulping machine, and the third discharge port is located at the upper part of the pulping machine. The pulping device also includes a first pipe and a second pipe, the second discharge port is connected to the third feed port through the first pipe, and the third discharge port is connected to the first feed port through the second pipe.

[0012] In one embodiment, the third discharge port is flush with the first feed port, and the height of the third discharge port is higher than the height of the liquid level in the circulation tank.

[0013] In one embodiment, the inner radial direction of the first discharge port is gradually expanded in a direction away from the second feed port.

[0014] In one embodiment, the first discharge port is located at the bottom of the stirring chamber; or, the first discharge port is located on the side wall of the stirring chamber, and the first discharge port is arranged close to the bottom of the circulation tank.

[0015] In one embodiment, the rotor pump includes a pump body and a screw pushing mechanism, the screw pushing mechanism is located between the circulation tank and the pump body, the screw pushing mechanism has the second feed port and the outlet, the pump body has an inlet and the second discharge port, the outlet is directly connected to the inlet, and the screw pushing mechanism can transport the slurry from the circulation tank to the pump body.

[0016] In an embodiment of the present invention, the circulation tank is provided with a stirring chamber for accommodating and storing slurry. The first feed port of the circulation tank is located at the upper part or side of the circulation tank, which is more convenient for adding new slurry into the stirring chamber. The stirring mechanism can rotate relative to the circulation tank, so that the slurry located at the upper part of the stirring chamber can be pressed down to the bottom of the stirring chamber under the action of its own gravity and the stirring mechanism, which is convenient for the slurry to flow out from the first discharge port and is also convenient for the slurry to be effectively stirred, ensuring the uniform mixing and processing of the slurry and improving the quality of the final product. The rotor pump is used to transport the slurry in the circulation tank to the pulper, and the pulper is used to further process the slurry and transport the slurry to the circulation tank, thereby forming a slurry circulation path. Among them, the rotor pump is provided with a second feed port at the upper part and a second discharge port at the lower part. The second feed port of the rotor pump is located below the first discharge port of the circulation tank and is directly connected to the first discharge port of the circulation tank. Compared with the existing pulping system, the rotor pump and the circulation tank do not need to be connected through a pipeline, which reduces the overall pipeline length and the number of elbows of the pulping device, can significantly reduce the fluid resistance in the pulping device, reduce the possibility of slurry deposition and blockage, thereby reducing the energy consumption required for the rotor pump to transport the slurry, and make it easier for the rotor pump to absorb slurry with high solid content and high viscosity. It can also reduce the flow distance of slurry with high solid content and high viscosity in the pipeline, speed up the circulation speed of the slurry, and improve the pulping efficiency. Reducing the pipeline connection can also reduce production costs, save installation space, make the entire pulping device more compact, and can be used in working environments with limited space, thereby improving the scope of application of the pulping device. The technical solution of the present invention reduces the overall pipeline length and the number of elbows of the pulping device by directly connecting the first discharge port of the circulation tank with the second feed port of the rotor pump, improves the flow characteristics of the slurry, reduces the possibility of slurry deposition and clogging, reduces the energy consumption required for the rotor pump to transport the slurry, makes it easier for the rotor pump to suck slurry with high solid content and high viscosity, improves the pulping efficiency, and simplifies the structure of the pulping device, making it easier to install, inspect and maintain; by adopting a stirring mechanism, the slurry located in the upper part of the stirring chamber can be pressed down to the bottom of the stirring chamber under the action of its own gravity and the stirring mechanism, which not only facilitates the slurry to flow out from the first discharge port, but also facilitates the effective stirring of the slurry, ensures the uniform mixing and processing of the slurry, and improves the quality of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1This is a structural diagram of an embodiment of a pulping device of the present utility model;

[0019] Figure 2 This is a structural schematic diagram of an embodiment of a low-speed stirring assembly of a pulping device of the present utility model;

[0020] Figure 3 This is a structural schematic diagram of another perspective of an embodiment of a low-speed stirring assembly of a pulping device of the present invention;

[0021] Figure 4 This is a structural schematic diagram of an embodiment of a stirring paddle of a pulping device of the present invention.

[0022] Description of Figure Numbers:

[0023] 100. Pulping device; 1. Circulation tank; 11. Stirring chamber; 12. First feed port; 13. First discharge port; 14. Liquid level; 15. Solvent inlet; 2. Rotor pump; 21. Pump body; 211. Second feed port; 212. Second discharge port; 3. Pulping machine; 31. Third feed port; 32. Third discharge port; 33. Powder inlet; 4. Stirring mechanism; 41. Low-speed stirring assembly; 411. Low-speed drive member; 412. First stirring member; 413. Scraper member; 4131. Bushing; 4132. First scraper; 4133. Second scraper; 42. High-speed stirring assembly; 421. High-speed drive member; 422. Second stirring member; 4221. Stirring shaft; 4222. Stirring paddle; 42221. Connecting sleeve; 42222. Paddle; 5. First pipeline; 6. Second pipeline.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, and back), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] With the development of lithium battery technology, in order to save energy and improve production efficiency, lithium battery slurry is developing towards solvent-free or low-solvent direction. The solid content of the slurry is getting higher and higher, resulting in higher and higher viscosity. The existing circulating pulping system cannot adapt to ultra-high viscosity conditions, which restricts the function of the equipment and limits the application of this type of equipment in the field of lithium battery pulping.

[0029] In particular, the graphite slurry for the negative electrode of lithium batteries needs to be stirred under high viscosity conditions to fully wet the deionized water and graphite. The existing circulating pulping system can only adapt to pulping under a viscosity condition of 100,000cp, while the viscosity of the negative electrode pulping is 500,000cp~1,000,000cp. The existing circulating pulping system cannot meet the needs of negative electrode pulping, which seriously restricts the use of this equipment in negative electrode pulping.

[0030] After careful research, the applicant found that there are two main reasons why the existing circulating pulping system cannot handle high-solid content, high-viscosity slurry. On the one hand, the fluidity of high-solid content, high-viscosity slurry is poor, and the rotor pump as the next process equipment is prone to air suction risk. On the other hand, the circulation pipeline of the circulating pulping system is too long, resulting in large pipeline resistance, and the rotor pump is unable to transport high-solid content slurry.

[0031] The main purpose of the utility model is to propose a pulping device to solve the problem of how to design a circulating pulping system for high solid content and high viscosity working conditions.

[0032] See also Figure 1In one embodiment of the present invention, the pulping device 100 includes a circulation tank 1, a rotor pump 2, a pulping machine 3 and a stirring mechanism 4. The circulation tank 1 is provided with a stirring chamber 11, which is used to accommodate slurry. The circulation tank 1 is also provided with a first feed port 12 and a first discharge port 13 connected to the stirring chamber 11. The first feed port 12 is located at the upper part or side of the circulation tank 1. The upper part of the rotor pump 2 is provided with a second feed port 211 and the lower part is provided with a second discharge port 212. The first discharge port 13 is directly connected to the second feed port 211. The pulping machine 3 has a third feed port 31 and a third discharge port 32. The second discharge port 212 is connected to the third feed port 31, and the third discharge port 32 is connected to the first feed port 12. The stirring mechanism 4 can rotate relative to the circulation tank 1 to press the slurry in the upper part of the stirring chamber 11 down to the bottom of the stirring chamber 11.

[0033] In an embodiment of the present invention, the circulation tank 1 is provided with a stirring chamber 11 for accommodating and storing slurry. The first feed port 12 of the circulation tank 1 is located at the upper part or side of the circulation tank 1, which is more convenient for adding new slurry into the stirring chamber 11. The stirring mechanism 4 can rotate relative to the circulation tank 1, so that the slurry located at the upper part of the stirring chamber 11 can be pressed down to the bottom of the stirring chamber 11 under the action of its own gravity and the stirring mechanism 4, which is convenient for the slurry to flow out from the first discharge port 13 and is also convenient for the slurry to be effectively stirred, thereby ensuring the uniform mixing and processing of the slurry and improving the quality of the final product. The rotor pump 2 is used to transport the slurry in the circulation tank 1 to the pulper 3, and the pulper 3 is used to further process the slurry and transport the slurry to the circulation tank 1, thereby forming a slurry circulation path. Among them, the upper part of the rotor pump 2 is provided with a second feed port 211 and the lower part is provided with a second discharge port 212. The second feed port 211 of the rotor pump 2 is located below the first discharge port 13 of the circulation tank 1 and is directly connected to the first discharge port 13 of the circulation tank 1. Compared with the existing pulping system, the rotor pump 2 and the circulation tank 1 do not need to be connected through a pipeline, which reduces the overall pipeline length and the number of elbows of the pulping device 100, can significantly reduce the fluid resistance in the pulping device 100, reduce the possibility of slurry deposition and blockage, thereby reducing the energy consumption required for the rotor pump 2 to transport the slurry, and make it easier for the rotor pump 2 to absorb slurry with high solid content and high viscosity. It can also reduce the flow distance of slurry with high solid content and high viscosity in the pipeline, speed up the circulation speed of the slurry, and improve the pulping efficiency. Reducing the pipeline connection can also reduce production costs and save installation space, making the entire pulping device 100 more compact and applicable to working environments with limited space, thereby improving the scope of application of the pulping device 100.

[0034] The technical solution of the present invention reduces the overall pipeline length and the number of elbows of the pulping device 100 by directly connecting the first discharge port 13 of the circulation tank 1 with the second feed port 211 of the rotor pump 2, improves the flow characteristics of the slurry, reduces the possibility of slurry deposition and clogging, reduces the energy consumption required for the rotor pump 2 to transport the slurry, makes it easier for the rotor pump 2 to suck slurry with high solid content and high viscosity, improves the pulping efficiency, and simplifies the structure of the pulping device 100, making it easier to install, inspect and maintain; by adopting the stirring mechanism 4, the slurry located in the upper part of the stirring chamber 11 can be pressed down to the bottom of the stirring chamber 11 under the action of its own gravity and the stirring mechanism 4, which not only facilitates the slurry to flow out from the first discharge port 13, but also facilitates the effective stirring of the slurry, ensures the uniform mixing and processing of the slurry, and improves the quality of the final product.

[0035] In this embodiment, the low-speed drive element 411 can adopt a low-speed motor or motor, and the first stirring element 412 can adopt a screw-belt stirrer. The slurry in the stirring chamber 11 is stirred by the screw-belt blades on the screw-belt stirrer, so that the slurry located at the upper part of the stirring chamber 11 can be pressed down to the bottom of the stirring chamber 11.

[0036] See also Figures 1 to 3 In one embodiment, the stirring mechanism 4 includes a low-speed stirring assembly 41, and the low-speed stirring assembly 41 includes a low-speed driving member 411 and a first stirring member 412 that are transmission-connected. At least part of the body of the first stirring member 412 is located in the stirring chamber 11, and the low-speed driving member 411 can drive the first stirring member 412 to rotate relative to the circulation tank 1 to press the slurry at the upper part of the stirring chamber 11 to the bottom of the stirring chamber 11; the bottom of the stirring chamber 11 is a planar structure, and the low-speed stirring assembly 41 also includes a scraper component 413, and one end of the first stirring member 412 away from the low-speed driving member 411 is connected to the scraper component 413, and the scraper component 413 is inclined relative to the bottom wall of the stirring chamber 11, and the low-speed driving member 411 can drive the scraper component 413 relative to the bottom of the stirring chamber 11 through the first stirring member 412 Rotate to push the slurry to move to the first discharge port 13; specifically, the low-speed drive member 411 drives the first stirring member 412 to rotate, so that the slurry located at the upper part of the stirring chamber 11 can be pressed down to the bottom of the stirring chamber 11 under its own gravity and the action of the first stirring member 412, and the scraper member 413 set at an angle helps to push the slurry at the bottom of the stirring chamber 11 to the first discharge port 13, which is convenient for the continuous discharge of slurry with high solid content and high viscosity, ensuring the continuity of the pulping process and the fluidity of the slurry, reducing the pulping time and improving the pulping efficiency, and the scraper member 413 is inclined relative to the bottom wall of the stirring chamber 11, which can also reduce the dead angle in the stirring chamber 11, ensuring that all slurries can be fully stirred, avoiding local slurry deposition or unevenness, and improving the pulping quality.

[0037] In one embodiment, the scraper component 413 includes a sleeve 4131, a first scraper 4132 and a second scraper 4133. The sleeve 4131 is sleeved on the outer wall of the end of the first stirring member 412 away from the low-speed driving member 411. The first scraper 4132 and the second scraper 4133 are spaced apart along the outer periphery of the sleeve 4131. The first scraper 4132 and the second scraper 4133 are both inclined relative to the bottom wall of the stirring chamber 11, and the inclination directions of the first scraper 4132 and the second scraper 4133 are opposite. The first stirring member 412 can drive the first scraper 4132 and the second scraper 4133 to rotate relative to the bottom wall of the stirring chamber 11 to promote the movement of the slurry. To the first discharge port 13; specifically, the sleeve 4131 is sleeved on the outer wall of the first stirring member 412 to provide stable support for the first scraper 4132 and the second scraper 4133. The first scraper 4132 and the second scraper 4133 are spaced apart along the outer periphery of the sleeve 4131, and the inclination direction of the first scraper 4132 relative to the bottom wall of the stirring chamber 11 is opposite to the inclination direction of the second scraper 4133 relative to the bottom wall of the stirring chamber 11, so that the first scraper 4132 and the second scraper 4133 can push the slurry in the stirring chamber 11 toward the first discharge port 13 when rotating, thereby accelerating the circulation speed of the slurry and improving the pulping efficiency.

[0038] In this embodiment, a first angle is formed between the first scraper 4132 and the bottom wall of the stirring chamber 11, and a second angle is formed between the second scraper 4133 and the bottom of the stirring chamber 11. The first angle and the second angle are complementary in size, and the first angle is 30° to 60°. By setting the range of the first angle to 30° to 60°, it helps to optimize the flow path of the slurry so that the slurry can flow accurately to the first discharge port 13, and the appropriate first angle also helps to reduce the deposition of the slurry at the bottom of the stirring chamber 11, preventing uneven slurry or agglomeration due to deposition.

[0039] In one embodiment, the stirring mechanism 4 also includes a high-speed stirring component 42, which includes a high-speed driving member 421 and a second stirring member 422 that are transmission-connected. At least part of the body of the second stirring member 422 extends into the stirring chamber 11, and the high-speed driving member 421 can drive the second stirring member 422 to rotate relative to the circulation tank 1 so that the slurry can move to the first discharge port 13; specifically, the high-speed driving member 421 drives the second stirring member 422 to rotate, which helps to better disperse the solid particles in the slurry and ensure the uniformity of the slurry, and the second stirring member 422 can achieve rapid mixing of the slurry in a short time, and can further push the slurry to the first discharge port 13, thereby improving the slurrying efficiency.

[0040] See also Figure 1 and Figure 4In one embodiment, the second stirring member 422 includes a stirring shaft 4221 and a stirring paddle 4222, the stirring paddle 4222 includes a connecting sleeve 42221 and a blade 42222, the stirring shaft 4221 is rotatably installed on the circulation tank 1, and part of the body of the stirring shaft 4221 extends into the stirring chamber 11, the connecting sleeve 42221 is sleeved on the outer wall of the stirring shaft 4221, and the blade 42222 is obliquely arranged on the outer wall of the connecting sleeve 42221, and the end of the stirring shaft 4221 away from the stirring paddle 4222 is connected to the high-speed driving member 421, and the high-speed driving member 421 can be driven by the stirring shaft 4221 and the connecting sleeve. 42221 drives the paddles 42222 to rotate relative to the circulation tank 1 so that the slurry can move to the first discharge port 13. Specifically, the connecting sleeve 42221 is sleeved on the outer wall of the stirring shaft 4221 to provide stable support for the paddles 42222. The combination of the driving power of the paddles 42222 and the high-speed drive member 421 can improve the stirring efficiency and ensure that the slurry is evenly mixed in the stirring chamber 11. The inclined setting of the paddles 42222 helps to generate axial flow, which can further push the slurry from the top to the bottom of the stirring chamber 11 and ultimately move to the first discharge port 13, thereby improving the pulping efficiency. In addition, in this embodiment, the number of paddles 42222 is at least two, and at least two paddles 42222 are spaced apart along the outer wall of the connecting sleeve 42221.

[0041] In this embodiment, the high-speed driving member 421 can be a high-speed motor, and the second stirring member 422 can be an axial turbine, which rotates relative to the circulation tank 1 so that the slurry can move to the first discharge port 13.

[0042] In one embodiment, the pulping machine 3 is tilted, the third feed port 31 is located at the lower part of the pulping machine 3, and the third discharge port 32 is located at the upper part of the pulping machine 3. The pulping device 100 further includes a first pipe 5 and a second pipe 6. The second discharge port 212 is communicated with the third feed port 31 through the first pipe 5, and the third discharge port 32 is communicated with the first feed port 12 through the second pipe 6. Specifically, the tilted pulping machine 3 can make the third feed port 31 located at the lower part of the pulping machine 3. In this embodiment, the third feed port 31 is located at the lowest point of the pulping machine 3, which can shorten the distance between the second discharge port 212 and the third discharge port 31. The length of the first pipe 5 between the feed port 31 is shortened and has fewer elbows through reasonable pipe layout, thereby reducing the flow distance of the slurry in the pipe, reducing the fluid resistance in the pulping device 100, and reducing the energy consumption required for the rotor pump 2 to transport the slurry, making it easier for the rotor pump 2 to absorb slurry with high solid content and high viscosity, thereby accelerating the circulation speed of the slurry and improving the pulping efficiency; by setting a second pipe 6 to connect the third discharge port 32 and the first feed port 12, the slurry in the pulping machine 3 can be transported to the stirring chamber 11, thereby facilitating the realization of the slurry circulation path.

[0043] In addition, in this embodiment, a valve can be set on the second pipeline. By setting the valve, the flow rate of the slurry and powder in the second pipeline can be controlled to ensure that the slurry and powder flow at a predetermined rate, thereby accurately controlling the slurrying process.

[0044] In one embodiment, the third discharge port 32 is flush with the first feed port 12, and the height of the third discharge port 32 is higher than the height of the liquid level 14 in the circulation tank 1; specifically, since the first feed port 12 of the circulation tank 1 is located at the upper part or the side of the circulation tank 1, the pulping machine 3 can be tilted and arranged at the upper part or the side of the circulation tank 1, thereby greatly shortening the length of the second pipeline 6; in this embodiment, the third discharge port 32 is flush with the first feed port 12, so that the second pipeline 6 can be a straight pipe structure, reducing the number of elbows in the pipeline. , which helps to maintain the continuity and uniformity of the slurry flow, reduces the pressure loss caused by height difference, can reduce the energy consumption required by the rotor pump 2 to transport slurry with high solid content and high viscosity, is more convenient for the circulation of slurry, and improves the pulping efficiency; the height of the third discharge port 32 is higher than the height of the liquid level 14 in the circulation tank 1, which can ensure that the slurry flows out smoothly from the pulping machine 3 and avoid the difficulty of discharging due to the pressure of the liquid level 14, and also helps to prevent the liquid in the circulation tank 1 from flowing back in the pipeline, thereby improving the safety of the pulping device 100.

[0045] In one embodiment, the inner diameter of the first discharge port 13 is gradually expanded in a direction away from the second feed port 211; specifically, the first discharge port 13 is gradually expanded from bottom to top, which helps to reduce the flow resistance of the slurry at the first discharge port 13, improve the flow characteristics of the slurry, and enable the slurry to flow smoothly and orderly into the second feed port 211, thereby increasing the flow speed of the slurry.

[0046] In one embodiment, the first discharge port 13 is located at the bottom of the stirring chamber 11; or, the first discharge port 13 is located on the side wall of the stirring chamber 11 and is positioned near the bottom of the circulation tank 1. Specifically, when the first discharge port 13 is located at the bottom of the stirring chamber 11, it helps reduce slurry sedimentation, allowing the slurry to be more thoroughly discharged from the first discharge port 13 by its own gravity. When the first discharge port 13 is located on the side wall of the stirring chamber 11 and is positioned near the bottom of the circulation tank 1, it helps optimize the flow path of the slurry and reduce dead angles during the flow process. In this embodiment, the specific location of the first discharge port 13 is not limited.

[0047] In one embodiment, the rotor pump 2 includes a pump body 21 and a screw pushing mechanism (not shown in the figure), the screw pushing mechanism is located between the circulation tank 1 and the pump body 21, the screw pushing mechanism has a second feed port 211 and an outlet (not shown in the figure), the pump body 21 has an inlet (not shown in the figure) and a second discharge port 212, the outlet is directly connected to the inlet, and the screw pushing mechanism can transport the slurry from the circulation tank 1 to the pump body 21; specifically, the screw pushing mechanism can provide additional power during the flow of the slurry, which helps the slurry to overcome the resistance in the pulping device 100. The screw pushing mechanism can effectively push the slurry from the circulation tank 1 to the pump body 21 through its rotational action, thereby improving the transportation efficiency, and the screw pushing mechanism can also control the flow rate of the slurry by adjusting the rotation speed, thereby achieving precise control of the pulping process.

[0048] In addition, in this embodiment, the circulation tank 1 is further provided with a solvent inlet 15 connected to the stirring chamber 11, and the pulping machine 3 is further provided with a powder inlet 33 connected to the third feed port 31 and the third discharge port 32. The solvent can be added to the stirring chamber 11 through the solvent inlet 15, and the powder can be added to the pulping machine 3 through the powder inlet 33, and flow into the stirring chamber 11 through the second pipe 6, so that the solvent and powder can be stirred in the stirring chamber 11.

[0049] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pulping device, characterized in that: The pulping device includes a circulation tank, a rotor pump, a pulping machine and a stirring mechanism. The circulation tank is provided with a stirring chamber, which is used to accommodate slurry. The circulation tank is also provided with a first feed port and a first discharge port connected to the stirring chamber. The first feed port is located at the upper part or side of the circulation tank. The upper part of the rotor pump is provided with a second feed port and the lower part is provided with a second discharge port. The first discharge port is directly connected to the second feed port. The pulping machine has a third feed port and a third discharge port. The second discharge port is connected to the third feed port, and the third discharge port is connected to the first feed port. The stirring mechanism can rotate relative to the circulation tank to press the slurry in the upper part of the stirring chamber down to the bottom of the stirring chamber.

2. The pulping device according to claim 1, characterized in that: The stirring mechanism includes a low-speed stirring assembly, which includes a low-speed driving member and a first stirring member connected by a transmission, at least part of the body of the first stirring member is located in the stirring chamber, and the low-speed driving member can drive the first stirring member to rotate relative to the circulation tank to press the slurry in the upper part of the stirring chamber down to the bottom of the stirring chamber; the bottom of the stirring chamber is a planar structure, and the low-speed stirring assembly also includes a scraper member, and the end of the first stirring member away from the low-speed driving member is connected to the scraper member, and the scraper member is inclined relative to the bottom wall of the stirring chamber, and the low-speed driving member can drive the scraper member to rotate relative to the bottom of the stirring chamber through the first stirring member to push the slurry to move to the first discharge port.

3. The pulping device according to claim 2, characterized in that: The scraper component includes a sleeve, a first scraper and a second scraper. The sleeve is sleeved on the outer wall of the first stirring member at one end away from the low-speed drive member. The first scraper and the second scraper are spaced apart along the outer periphery of the sleeve. The first scraper and the second scraper are both inclined relative to the bottom wall of the stirring chamber, and the inclination directions of the first scraper and the second scraper are opposite. The first stirring member can drive the first scraper and the second scraper to rotate relative to the bottom wall of the stirring chamber to push the slurry to move to the first discharge port.

4. The pulping device according to claim 2, characterized in that: The stirring mechanism also includes a high-speed stirring assembly, which includes a high-speed driving member and a second stirring member connected by a transmission, at least part of the body of the second stirring member extends into the stirring chamber, and the high-speed driving member can drive the second stirring member to rotate relative to the circulation tank so that the slurry can move to the first discharge port.

5. The pulping device according to claim 4, characterized in that: The second stirring member includes a stirring shaft and a stirring paddle, and the stirring paddle includes a connecting sleeve and a blade. The stirring shaft is rotatably installed on the circulation tank, and part of the body of the stirring shaft extends into the stirring chamber. The connecting sleeve is sleeved on the outer wall of the stirring shaft, and the blade is obliquely arranged on the outer wall of the connecting sleeve. The end of the stirring shaft away from the stirring paddle is connected to the high-speed driving member, and the high-speed driving member can drive the blade to rotate relative to the circulation tank through the stirring shaft and the connecting sleeve, so that the slurry can move to the first discharge port.

6. The pulping device according to claim 1, characterized in that: The pulping machine is arranged at an angle, the third feed port is located at the lower part of the pulping machine, and the third discharge port is located at the upper part of the pulping machine. The pulping device also includes a first pipe and a second pipe. The second discharge port is connected to the third feed port through the first pipe, and the third discharge port is connected to the first feed port through the second pipe.

7. The pulping device according to claim 6, characterized in that: The third discharge port is flush with the first feed port, and the third discharge port is higher than the liquid level in the circulation tank.

8. The pulping device according to any one of claims 1 to 7, characterized in that: The inner radial direction of the first discharge port is gradually expanded in a direction away from the second feed port.

9. The pulping device according to any one of claims 1 to 7, characterized in that: The first discharge port is located at the bottom of the stirring chamber; or, the first discharge port is located on the side wall of the stirring chamber, and the first discharge port is arranged close to the bottom of the circulation tank.

10. The pulping device according to any one of claims 1 to 7, characterized in that: The rotor pump includes a pump body and a screw pushing mechanism, the screw pushing mechanism is located between the circulation tank and the pump body, the screw pushing mechanism has the second feed port and the outlet, the pump body has an inlet and the second discharge port, the outlet is directly connected to the inlet, and the screw pushing mechanism can transport the slurry from the circulation tank to the pump body.

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