Pulping system

Abstract

The present application discloses a pulping system, including a powder supply component, a liquid supply component, a first pulping component, a second pulping component and a circulation component. The first pulping component includes a powder inlet, a liquid inlet and a first outlet arranged at intervals along the pulp conveying direction; the powder supply component is connected to the powder inlet, and the liquid supply component is connected to the liquid inlet; the second pulping component includes an input end and an output end; the input end is connected to the first outlet; and the circulation component is connected to the output end and the input end respectively. The present application utilizes a powder supply component to pre-mix the powder, and the first pulping component and the second pulping component pulp independently in sequence, which is convenient for flexible position control and can improve pulping efficiency; the circulation component cooperates with the second pulping component to circulate and disperse the pulp, further improving the dispersion strength and quality of the pulp. The components of the present application work together and are flexibly controlled to effectively improve work efficiency and compatibility.

Description

Technical Field

[0001] The present application belongs to the technical field of battery production, and specifically relates to a pulping system. Background Art

[0002] The pulping process is the first step in preparing lithium batteries. The performance of the slurry determines the relevant performance of the battery to a large extent. However, the pulping systems commonly used at present often have the problem of poor dispersion effect and low dispersion efficiency of the slurry produced. Utility Model Content

[0003] Purpose of the utility model: The embodiment of the present application provides a pulping system, which aims to solve the problem of poor dispersion effect and low dispersion efficiency of existing slurry.

[0004] Technical solution: A pulping system described in an embodiment of the present application includes:

[0005] Powder supply assembly;

[0006] Liquid supply components;

[0007] The first pulping assembly comprises a powder material inlet, a liquid material inlet and a first material outlet which are arranged at intervals along the pulp conveying direction; the powder material supply assembly is connected to the powder material inlet, and the liquid material supply assembly is connected to the liquid material inlet;

[0008] A second pulping component, comprising an input end and an output end; the input end is connected to the first discharge port;

[0009] A circulation component is connected to the output end and the input end respectively.

[0010] In some embodiments, the first pulping component is a twin-screw kneader and the second pulping component is a disperser.

[0011] In some embodiments, the loop component includes:

[0012] A first pipeline connected to the output end;

[0013] A second pipeline connected to the input end;

[0014] The circulation tank comprises an inlet and an outlet; the inlet is connected to an end of the first pipeline away from the output end, and the outlet is connected to an end of the second pipeline away from the input end.

[0015] In some embodiments, the circulation component further includes a circulation pump connected between the outlet and the second pipeline.

[0016] In some embodiments, the powder supply assembly includes:

[0017] A mixing bin, comprising a feed inlet and a second discharge outlet, wherein the feed inlet is used to inject powder, and the second discharge outlet is connected to the powder inlet;

[0018] The stirring part is arranged in the mixing bin and is used for stirring the mixed powder.

[0019] In some embodiments, the powder supply assembly further comprises a multi-flap rotary valve, an input side of the multi-flap rotary valve is connected to the second discharge port, and an output side of the multi-flap rotary valve is connected to the powder inlet.

[0020] In some embodiments,

[0021] The liquid material supply assembly includes a liquid material tank and a first liquid infusion pipeline, wherein the first liquid infusion pipeline includes a main pipe and a plurality of branch pipes, the main pipe is connected to the liquid material tank, and the plurality of branch pipes are connected in parallel to an end of the main pipe away from the liquid material tank;

[0022] The first pulping component is provided with a plurality of liquid material inlets spaced apart along the pulp conveying direction, and each of the branch pipes is connected to one of the liquid material inlets.

[0023] In some embodiments, the first infusion pipeline also includes a flow meter and a plurality of first valves; the flow meter is arranged at one end of the main pipe close to the liquid material tank, for measuring the flow of the main pipe; the plurality of first valves are respectively arranged on the plurality of branch pipes in a one-to-one correspondence, for respectively controlling the on and off of each branch pipe.

[0024] In some embodiments, the pulping system includes a plurality of the liquid supply components, which are spaced apart along the pulp conveying direction and are respectively connected to the first pulping component.

[0025] In some embodiments, the liquid supply component includes a second infusion pipeline, which is connected between the circulation component and the main pipe, and the second infusion pipeline is arranged downstream of the flow meter and upstream of the plurality of branch pipes.

[0026] In some embodiments,

[0027] The second infusion pipeline includes a third pipeline and a second valve, the third pipeline is connected to the main pipeline and the circulation component respectively, and the second valve is arranged on the third pipeline to control the opening and closing of the third pipeline;

[0028] The first infusion pipeline further includes a third valve, which is disposed on the main pipe, and the third valve is disposed downstream of the connection between the third pipe and the main pipe, and upstream of the plurality of branch pipes.

[0029] Beneficial effects: Compared with the prior art, a pulping system according to an embodiment of the present application includes a powder supply component, a liquid supply component, a first pulping component, a second pulping component and a circulation component. The first pulping component includes a powder inlet, a liquid inlet and a first outlet arranged at intervals along the slurry conveying direction; the powder supply component is connected to the powder inlet, and the liquid supply component is connected to the liquid inlet; the second pulping component includes an input end and an output end; the input end is connected to the first outlet; and the circulation component is connected to the output end and the input end respectively. The present application realizes powder premixing by setting a powder supply component, reduces the mixing difficulty of the first pulping component, and realizes direct slurry production by the first pulping component; at the same time, the first pulping component and the second pulping component are used to make slurry in sequence, which is convenient for flexible position control and can gradually improve the dispersion strength of the slurry; the circulation component and the second pulping component are used to cooperate to circulate and disperse the slurry, further improving the dispersion strength and quality of the slurry. The present application combines a pulping system with multiple components, and each component can work together and can be flexibly controlled according to production needs, effectively improving work efficiency and compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a schematic diagram of the overall structure of a pulping system according to an embodiment of the present application;

[0032] Figure 2 is a partial cross-sectional view of a pulping system according to an embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the overall structure of the first pulping assembly of the present application;

[0034] Figure 4 is a schematic diagram of the overall structure of the powder supply assembly of an embodiment of the present application;

[0035] Figure 5 It is a schematic diagram of the overall structure of the liquid supply assembly of an embodiment of the present application.

[0036] 1. Powder supply assembly; 11. Mixing bin; 111. Feed inlet; 112. Second discharge outlet; 12. Stirring section; 13. Multi-flap rotary valve; 2. Liquid supply assembly; 21. Liquid bin; 22. First infusion pipeline; 221. Main pipe; 222. Branch pipe; 223. Flow meter; 224. First valve; 225. Third valve; 23. Second infusion pipeline; 231. Third pipeline; 232. Second valve; 3. First pulping assembly; 31. Powder inlet; 32. Liquid inlet; 33. First discharge outlet; 4. Second pulping assembly; 41. Input end; 42. Output end; 5. Circulation assembly; 51. First pipeline; 52. Second pipeline; 53. Circulation tank; 531. Inlet; 532. Outlet; 54. Circulation pump. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined. In the description of this application, "vertical" means completely vertical at 90° or almost completely vertical, for example, an angle within the range of 80° to 100° is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel, for example, an angle within 10° of completely parallel is considered parallel.

[0039] The pulping process is the first step in preparing lithium batteries. The performance of the slurry largely determines the relevant performance of the battery. The lithium battery industry often uses a double planetary mixer or a twin-screw pulping system for pulping. Among them, although the double planetary mixer is the most widely used pulping equipment, its pulping efficiency is low, the equipment is repeated many times, and the energy consumption is also high; the twin-screw pulping system has complex overall equipment and high equipment cost, and the dispersion strength of the slurry is insufficient. The screw length is too long and it is easy to bend and produce metal friction, resulting in abnormal slurry quality.

[0040] In view of this, an embodiment of the present application provides a pulping system, aiming to solve at least one of the above problems.

[0041] Please refer to Figure 1-Figure 5 The embodiment of the present application provides a pulping system, including a powder supply component 1, a liquid supply component 2, a first pulping component 3, a second pulping component 4 and a circulation component 5. The first pulping component 3 includes a powder inlet 31, a liquid inlet 32 ​​and a first outlet 33 arranged at intervals along the pulp conveying direction; the powder supply component 1 is connected to the powder inlet 31, and the liquid supply component 2 is connected to the liquid inlet 32; the second pulping component 4 includes an input end 41 and an output end 42; the input end 41 is connected to the first outlet 33; the circulation component 5 is respectively connected to the output end 42 and the input end 41.

[0042] The present application realizes pre-mixing of powder by setting a powder supply component 1, reduces the mixing difficulty of the first pulping component 3, and realizes the first pulping component 3 to directly make pulp; at the same time, the first pulping component 3 and the second pulping component 4 are used to make pulp in sequence, which is convenient for flexible position regulation and can gradually improve the dispersion strength of pulp; the circulation component 5 cooperates with the second pulping component 4 to circulate and disperse the pulp, further improving the dispersion strength and quality of the pulp. The present application combines a pulping system with multiple components, each component can work together, and can be flexibly regulated according to production needs, effectively improving work efficiency and compatibility.

[0043] In the embodiment of the present application, all the powders required for making the slurry can be uniformly put into the powder supply component 1 according to a certain proportion, and the powders can be pre-mixed by the powder supply component 1, and the pre-mixed powders are input into the first slurry component 3, and then a certain proportion of liquid is injected into the first slurry component 3 by the liquid supply component 2. At this time, the first slurry component 3 can knead and slurry the powders, effectively reducing the mixing difficulty of the first slurry component 3 and improving the slurrying efficiency of the first slurry component 3. Among them, the powders can include main powders and auxiliary powders, and the main powders and auxiliary powders are first mixed evenly by the powder supply component 1, and then injected into the first slurry component 3 for kneading and slurrying. In the first pulping component 3, the mixed powder and the injected liquid are mixed and squeezed and kneaded by the first pulping component 3, and are continuously transported to the outlet 532 and transported to the second pulping component 4. The second pulping component 4 continues to mix and disperse the pre-made pulp output by the first pulping component 3. At the same time, the pulp further mixed by the second pulping component 4 is input into the circulation component 5 for further dispersion. At the same time, the circulation component 5 is circulated and then output to the second pulping component 4. After several cycles, a dispersed pulp with qualified quality is obtained.

[0044] The present application performs the first mixing of the powder by premixing the powder through the powder supply component 1; performs the second mixing of the powder and the liquid by mixing, extruding and kneading through the first pulping component 3; further mixes and disperses the prefabricated pulp output by the first pulping component 3 through the second pulping component 4 to perform the third mixing; further disperses the pulp in the circulation component 5 to perform the fourth mixing; and simultaneously, a circulation conveying is formed between the circulation component 5 and the second pulping component 4 to perform the mixing of the pulp several times, thereby achieving the expected pulp dispersion strength and quality.

[0045] It should be noted that a certain amount of liquid material configured for producing qualified slurry can be pre-stored in the circulation component 5 or injected externally, which can be mixed into the slurry during circulation dispersion with the second slurry making component 4, thereby adjusting the solid content and viscosity of the slurry.

[0046] In some embodiments, the first pulping component 3 may be a twin-screw kneader, and the second pulping component 4 may be a disperser.

[0047] In the embodiment of the present application, the first pulping component 3 can be a twin-screw kneading machine. The twin-screw kneading machine of the present application is short in length and occupies a small space. It can realize the extrusion and kneading of the slurry, and does not need to continuously extrude, knead and disperse the slurry. Therefore, the two screws therein are relatively short, which effectively avoids the possibility of screw bending, thereby effectively reducing metal friction and ensuring the quality of the slurry. The driving power requirement of the corresponding screw drive motor is not high, so the equipment cost can also be effectively reduced. Of course, the length, position and form of the screw can also be adjusted according to the needs. Of course, the first pulping component 3 can also be other slurry kneading equipment that can realize slurry kneading.

[0048] In the embodiment of the present application, the second pulping component 4 can be a disperser, preferably a high-speed disperser. A high-speed dispersing impeller is arranged inside the second pulping component 4, which can further mix and effectively disperse the prefabricated pulp kneaded by the first pulping component 3. At the same time, part of the liquid material circulated from the circulation component 5 into the second pulping component 4 is mixed and dispersed with the prefabricated pulp, and after being dispersed and sheared by the internal high-speed dispersing impeller, it is dispersed in the circulation component 5. At the same time, it circulates back and forth between the high-speed disperser and the circulation component 5, and finally obtains a qualified finished pulp.

[0049] The present application changes the slurry production process by configuring the first slurry making component 3 as a twin-screw kneading machine and configuring the second slurry making component 4 as a disperser, first kneading and then dispersing, thereby quickly obtaining the expected qualified slurry.

[0050] Specifically, the twin-screw kneading machine uses two screws with opposite directions to rotate and extrude in opposite directions, and the powder mixed with the liquid material is squeezed and mixed. With the push of the twin screws, the prefabricated slurry is finally kneaded and formed. Then it is transferred to the disperser, and the prefabricated slurry is mixed with the liquid material by the disperser, and the prefabricated slurry is sheared and crushed by a high-speed dispersion impeller, and the liquid material is mixed, so that the slurry and the liquid material are further mixed and dispersed, and the liquid material is evenly dispersed in the slurry, which improves the dispersion of the slurry, and then circulates with the circulation component 5 to finally obtain the finished slurry. Compared with the slurry output by continuous kneading and extrusion, this method effectively improves the efficiency, and the slurry dispersion strength can be effectively controlled, and the equipment cost is effectively reduced, and there is no risk of metal friction. In addition, the first pulping component 3 and the second pulping component 4 can be flexibly set according to the site conditions, which can reduce the restrictions on the production site.

[0051] like Figure 1As shown, in some embodiments, the circulation component 5 includes a first pipe 51, a second pipe 52 and a circulation tank 53, the first pipe 51 is connected to the output end 42, the second pipe 52 is connected to the input end 41, and the circulation tank 53 includes an inlet 531 and an outlet 532, the inlet 531 is connected to an end of the first pipe 51 away from the output end 42, and the outlet 532 is connected to an end of the second pipe 52 away from the input end 41.

[0052] In the embodiment of the present application, the first pipeline 51 and the second pipeline 52 are respectively connected between the circulation tank 53 and the second pulping component 4, so that the second pulping component 4 and the circulation tank 53 are connected, thereby realizing a closed loop between the circulation tank 53 and the second pulping component 4.

[0053] In specific implementation, the prefabricated slurry enters the second pulping component 4 from the input end 41 of the second pulping component 4, and at the same time, part of the liquid in the circulation tank 53 also flows to the input end 41 through the second pipe 52 and is finally injected into the second pulping component 4, the prefabricated slurry and the liquid are mixed and dispersed in the second pulping component 4, and after being dispersed and sheared in the second pulping component 4, they are discharged to the first pipe 51 through the outlet 532, and return to the circulation tank 53 through the first pipe 51 for dispersion, and the above-mentioned action is repeated several times to realize the production of slurry.

[0054] It should be noted that the circulation tank 53 is also provided with stirring blades, which can further stir the slurry entering therein, thereby preventing the slurry from settling in the circulation tank 53 and ensuring the dispersion strength of the slurry.

[0055] like Figure 1 As shown, in some embodiments, the circulation component 5 further includes a circulation pump 54 , and the circulation pump 54 is connected between the outlet 532 and the second pipeline 52 .

[0056] In the embodiment of the present application, a circulation pump 54 is provided to provide a pressure environment for the circulation line between the circulation tank 53 and the second pulping assembly 4, thereby improving the circulation efficiency of the circulation tank 53 and the second pulping assembly 4.

[0057] Please refer to Figure 1 and Figure 4 In some embodiments, the powder supply assembly 1 includes a mixing bin 11 and a stirring portion 12; the mixing bin 11 includes a feed port 111 and a second discharge port 112, the feed port 111 is used to inject powder, and the second discharge port 112 is connected to the powder inlet 31; the stirring portion 12 is arranged in the mixing bin 11, and is used to stir the mixed powder.

[0058] In the embodiment of the present application, the mixing bin 11 is used to accommodate powders, and the feed port 111 is used to input powders into the bin. There can be more than one feed port 111, so that multiple powders can be injected at the same time, and the powder flying caused by the feed port 111 being too large can be avoided. The stirring part 12 is used to stir and mix the multiple powders injected into the bin, so as to achieve premixing of the powders. Among them, the stirring part 12 can be a stirring structure such as a stirring blade, which can be driven manually or by a motor to achieve mixing of the powders. The second discharge port 112 is used to input the mixed powder into the first pulping component 3.

[0059] It should be noted that the present application effectively reduces the workload of the first pulping component 3 by providing a powder supply component 1 to pre-mix the powder, so that the first pulping component 3 is only used for kneading pulping, which also effectively reduces the volume or length of the first pulping component 3.

[0060] like Figure 1 and Figure 4 As shown, in some embodiments, the powder supply assembly 1 further includes a multi-flap rotary valve 13 , the input side of the multi-flap rotary valve 13 is connected to the second discharge port 112 , and the output side of the multi-flap rotary valve 13 is connected to the powder inlet 31 .

[0061] In the embodiment of the present application, the powder supply assembly 1 can continue to mix the premixed powder at the output end 42 of the mixing bin 11 by providing the multi-flap rotary valve 13, thereby further improving the uniformity of the powder mixing. At the same time, the multi-flap rotary valve 13 can also be used to control the input of the powder and interrupt the powder supply.

[0062] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, the liquid supply component 2 includes a liquid tank 21 and a first infusion pipeline 22, the first infusion pipeline 22 includes a main pipe 221 and multiple branch pipes 222, the main pipe 221 is connected to the liquid tank 21, and multiple branch pipes 222 are connected in parallel to the main pipe 221 at one end away from the liquid tank 21; the first pulping component 3 is provided with a plurality of liquid inlets 32 arranged at intervals along the slurry conveying direction, and each branch pipe 222 is connected to one liquid inlet 32.

[0063] In the embodiment of the present application, the liquid material bin 21 may be a liquid storage tank for storing liquid material, and the first liquid infusion pipeline 22 is used to transport the liquid material in the liquid material bin 21 to the first pulping component 3. Among them, the main pipe 221 is used to connect with the liquid material bin 21, and the plurality of branch pipes 222 are used to respectively connect to the plurality of liquid material inlets 32 arranged at intervals along the pulp conveying direction of the first pulping component 3, so as to realize the injection of liquid material into different positions in the first pulping component 3 through the plurality of branch pipes 222, thereby facilitating the mixing of the powder material and the liquid material, ensuring a more uniform mixing of the powder material and the liquid material, and making it more convenient to manufacture the pulp.

[0064] like Figure 5 As shown, in some embodiments, the first infusion pipeline 22 also includes a flow meter 223 and a plurality of first valves 224; the flow meter 223 is arranged at one end of the main pipe 221 close to the liquid material tank 21, and is used to measure the flow of the main pipe 221; the plurality of first valves 224 are respectively arranged on the plurality of branch pipes 222 in a one-to-one correspondence, and are used to respectively control the on and off of each branch pipe 222.

[0065] In the embodiment of the present application, the multiple first valves 224 are respectively used to control the on-off of each branch pipe 222, thereby controlling whether each liquid material inlet 32 ​​is injected with liquid material, and realizing flexible adjustment of the injection position. By setting a flow meter 223 on the main pipe 221, the flow rate of the injected liquid material can be measured, thereby realizing accurate control of the liquid material injection amount.

[0066] like Figure 1 As shown, in some embodiments, the pulping system includes a plurality of the liquid supply components 2, and the plurality of the liquid supply components 2 are arranged at intervals along the pulp conveying direction and are respectively connected to the first pulping components 3.

[0067] In the embodiment of the present application, by setting up multiple liquid material supply components 2, different liquid materials (such as various solvents and solutions) can be injected into the multiple liquid material components respectively to realize the configuration of liquid material solution and solvent during the production process.

[0068] Of course, when there is only one liquid supply assembly 2, the liquid tank 21 stores pre-configured liquid, which already contains a solution and a solvent.

[0069] like Figure 1 and Figure 5 As shown, in some embodiments, the liquid supply component 2 includes a second infusion pipeline 23, which is connected between the circulation component 5 and the main pipe 221, and the second infusion pipeline 23 is arranged downstream of the flow meter 223 and upstream of the multiple branches 222.

[0070] In the embodiment of the present application, the second infusion pipeline 23 is used to inject liquid into the circulation tank 53 of the circulation component 5 through the liquid supply component 2, so as to facilitate the continuous addition of liquid during the circulation pulping of the circulation component 5 and the second pulping component 4 to improve the solid content and annuality of the pulp.

[0071] It should be noted that the second infusion pipeline 23 needs to be set between the flow meter 223 and the branch pipe 222. At this time, the flow meter 223 can accurately control the total amount of liquid input during pulping to ensure the qualification and quality of the pulp, while also simplifying the structure of the pulping system.

[0072] like Figure 5 As shown, in some embodiments, the second infusion pipeline 23 includes a third pipeline 231 and a second valve 232, the third pipeline 231 is respectively connected to the main pipeline 221 and the circulation component 5, and the second valve 232 is arranged on the third pipeline 231 to control the on-off of the third pipeline 231; the first infusion pipeline 22 also includes a third valve 225, the third valve 225 is arranged on the main pipeline 221, and the third valve 225 is arranged downstream of the connection between the third pipeline 231 and the main pipeline 221, and is located upstream of the plurality of branch pipes 222.

[0073] In the embodiment of the present application, the third pipeline 231 is used to transport the liquid material in the main pipe 221 to the circulation component 5, the second valve 232 is used to control the on-off of the third pipeline 231, the second valve 232 is used to control the on-off of the main pipe 221, and the third valve 225 can be used in conjunction with the second valve 232. For example: the third valve 225 is opened, the second valve 232 is closed, at this time the main pipe 221 can transport liquid material to the branch pipe 222; the third valve 225 is closed, the second valve 232 is opened, at this time the main pipe 221 cannot transport liquid material like the branch pipe 222, and the third pipeline 231 transports liquid material to the circulation component 5; the third valve 225 is opened, the second valve 232 is opened, and liquid material is transported to the branch pipe 222 and the circulation component 5 at the same time; the third valve 225 is closed, the second valve 232 is closed, and the transport of liquid material is completely stopped.

[0074] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0075] The pulping system provided in the embodiment of the present application is introduced in detail above, and the principle and implementation mode of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pulping system, characterized in that: include: Powder supply assembly (1); Liquid material supply component (2); The first pulping component (3) comprises a powder material inlet (31), a liquid material inlet (32) and a first material outlet (33) arranged at intervals along the pulp conveying direction; the powder material supply component (1) is connected to the powder material inlet (31), and the liquid material supply component (2) is connected to the liquid material inlet (32); A second pulping assembly (4), comprising an input end (41) and an output end (42); the input end (41) is connected to the first discharge port (33); The circulation component (5) is respectively connected to the output end (42) and the input end (41).

2. The pulping system according to claim 1, characterized in that: The first pulping component (3) is a twin-screw kneader, and the second pulping component (4) is a disperser.

3. The pulping system according to claim 2, characterized in that: The circulation component (5) comprises: A first pipeline (51) connected to the output end (42); A second pipe (52) connected to the input end (41); The circulation tank (53) comprises an inlet (531) and an outlet (532); the inlet (531) is connected to an end of the first pipe (51) away from the output end (42), and the outlet (532) is connected to an end of the second pipe (52) away from the input end (41).

4. The pulping system according to claim 3, characterized in that: The circulation component (5) further comprises a circulation pump (54), wherein the circulation pump (54) is connected between the outlet (532) and the second pipeline (52).

5. The pulping system according to claim 1, characterized in that: The powder supply assembly (1) comprises: A mixing bin (11) comprising a feed port (111) and a second discharge port (112), wherein the feed port (111) is used to inject powder, and the second discharge port (112) is connected to the powder inlet (31); The stirring part (12) is arranged in the mixing bin (11) and is used for stirring the mixed powder.

6. The pulping system according to claim 5, characterized in that: The powder supply assembly (1) further comprises a multi-flap rotary valve (13), the input side of the multi-flap rotary valve (13) being connected to the second discharge port (112), and the output side of the multi-flap rotary valve (13) being connected to the powder inlet (31).

7. The pulping system according to claim 1, characterized in that: The liquid material supply assembly (2) comprises a liquid material bin (21) and a first liquid infusion pipeline (22), wherein the first liquid infusion pipeline (22) comprises a main pipe (221) and a plurality of branch pipes (222), wherein the main pipe (221) is in communication with the liquid material bin (21), and the plurality of branch pipes (222) are connected in parallel to an end of the main pipe (221) away from the liquid material bin (21); The first pulping component (3) is provided with a plurality of liquid material inlets (32) arranged at intervals along the pulp conveying direction, and each of the branch pipes (222) is connected to one of the liquid material inlets (32).

8. The pulping system according to claim 7, characterized in that: The first infusion pipeline (22) further comprises a flow meter (223) and a plurality of first valves (224); the flow meter (223) is connected to the main pipe (221) and is used to measure the flow of the main pipe (221); the plurality of first valves (224) are respectively arranged on the plurality of branch pipes (222) in a one-to-one correspondence and are used to respectively control the on-off of each branch pipe (222).

9. The pulping system according to claim 7 or 8, characterized in that: The pulping system comprises a plurality of the liquid material supply components (2), wherein the plurality of the liquid material supply components (2) are arranged at intervals along the pulp conveying direction and are respectively connected to the first pulping component (3).

10. The pulping system according to claim 8, characterized in that: The liquid material supply component (2) comprises a second liquid infusion pipeline (23), the second liquid infusion pipeline (23) being connected between the circulation component (5) and the main pipe (221), and the second liquid infusion pipeline (23) being arranged downstream of the flow meter (223) and upstream of the plurality of branch pipes (222).

11. The pulping system according to claim 10, characterized in that: The second infusion pipeline (23) comprises a third pipeline (231) and a second valve (232); the third pipeline (231) is connected to the main pipeline (221) and the circulation component (5) respectively; the second valve (232) is arranged on the third pipeline (231) and is used to control the opening and closing of the third pipeline (231); The first infusion pipeline (22) further comprises a third valve (225), wherein the third valve (225) is arranged on the main pipe (221), and the third valve (225) is arranged downstream of the connection between the third pipeline (231) and the main pipe (221), and is located upstream of the plurality of branch pipes (222).

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