Double-screw pulping system

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By setting up a main discharge pipe, connecting pipe group and multiple independently controlled dispersers in the twin-screw pulping system, the problems of excessive metal particles and limited pulping line speed caused by excessive screw length are solved, and the problem of excessive metal particles and limited pulping line speed is achieved. High-efficiency pulping and slurry quality improvement.

CN222510868UActive Publication Date: 2025-02-21WUXI RICH INTELLIGENT EQUIP CO LTD

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Patent Information

Application Number: CN202421199103.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-29
Publication Date: 2025-02-21
Estimated Expiration: 2034-05-29

AI Technical Summary

Technical Problem

In the existing twin-screw pulping system, the long screw length causes excessive metal particles to be produced, affecting the quality of the slurry, and the pulping line speed is limited, making it impossible to effectively disperse the slurry.

Method used

A twin-screw pulping system is designed to shorten the screw length and efficient pulping by setting up a main discharge pipe, a connecting pipe group and multiple independently controlled dispersers. Specific measures include: the length-to-diameter ratio of the screws inside the twin-screw kneading equipment is ≤32, the driving motor is used to drive the twin-screw kneading machine, and the precise amount of feeding is achieved through the feeding unit and the liquid supply system.

Benefits of technology

It effectively reduces the generation of metal particles, improves the quality of slurry, and realizes efficient pulping and continuous stirring, shearing and dispersion, improving pulping efficiency.

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Abstract

The utility model relates to a double-screw pulping system which comprises a double-screw kneading device, the feeding end of the double-screw kneading device is connected with a feeding unit, the discharging end of the double-screw kneading device is connected with a discharging main pipeline, and at least two connecting pipe sets are installed on the discharging main pipeline at intervals. One end of the single-group connecting pipe group is matched with the discharging main pipeline through a three-way valve, meanwhile, the other end of the single-group connecting pipe group is connected with the feeding end of the dispersion machine, and the plurality of dispersion machines are mutually independent; the feeding unit is used for feeding a powder material and a liquid material into the double-screw kneading equipment, the double-screw kneading equipment is used for stirring the powder material and the liquid material, so that a first mixed material is obtained, and the first mixed material flows into the corresponding dispersion machine through the discharging main pipeline and the connecting pipe group to be dispersed, so that a second mixed material is obtained. The length of the screws in the double-screw kneading machine can be effectively shortened, so that metal particles generated in the double-screw kneading machine are reduced, and the quality of slurry is improved; the efficient pulping can be realized, and the continuous stirring, shearing and dispersing of the slurry can be realized.

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Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery slurry, in particular to a twin-screw slurry making system. Background Art

[0002] Lithium battery slurry is used to prepare electrode sheets of lithium batteries, which is prepared by a slurry making system.

[0003] The pulping system in the prior art mostly uses a twin-screw kneader as the core equipment. In order to obtain a better pulping effect, the screw length in the kneader is usually longer. However, the twin-screw kneader with a longer screw length will produce a large amount of metal particles during pulping, affecting the pulp quality; at the same time, the pulping line speed of the twin-screw equipment is limited by the screw diameter and speed, and the pulp cannot be effectively dispersed. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a twin-screw pulping system, which can effectively shorten the length of the screw in the twin-screw kneading machine, thereby reducing the generation of metal particles in the twin-screw kneading machine and improving the quality of the pulp; it can achieve efficient pulping and realize continuous stirring, shearing and dispersion of the pulp.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A twin-screw pulping system comprises a twin-screw kneading device, wherein the feeding end of the twin-screw kneading device is connected to a feeding unit, and the discharging end of the twin-screw kneading device is connected to a discharging main pipeline, and at least two groups of connecting pipes are installed on the discharging main pipeline at intervals, and one end of a single group of connecting pipes is installed in cooperation with the discharging main pipeline through a three-way valve, and the other end is connected to the feeding end of a disperser, and multiple dispersers are independent of each other;

[0007] The feeding unit feeds the powder and the liquid into the twin-screw kneading device, and the twin-screw kneading device stirs the powder and the liquid to obtain a first mixed material. The first mixed material flows into the corresponding disperser through the discharge main pipeline and the connecting pipe group to obtain a second mixed material.

[0008] As a further improvement of the above technical solution:

[0009] The length-to-diameter ratio of the screw inside the twin-screw kneading device is ≤32.

[0010] The twin-screw kneading device comprises a driving motor, and an output end of the driving motor is connected to the twin-screw kneading machine.

[0011] The barrel of the twin-screw kneader is respectively provided with a first kneading inlet, a plurality of second kneading inlets and a kneading outlet;

[0012] The first kneading feed inlet and the second kneading feed inlet correspond to the feeding end of the twin-screw kneader;

[0013] The kneading discharge port corresponds to the discharge end of the twin-screw kneader.

[0014] The first kneading feed port is matched with an inverted cone-shaped collecting bin.

[0015] The feeding unit comprises a powder feeding tank and a liquid supply system. The powder feeding tank feeds powder into the twin-screw kneading device, and the liquid supply system feeds liquid into the twin-screw kneading device.

[0016] The powder feeding tank adopts a loss-in-weight scale.

[0017] A delivery pump is installed on the main discharge pipeline.

[0018] The disperser is provided with a dispersion inlet and a dispersion outlet;

[0019] The dispersion feed port corresponds to the feed end of the disperser.

[0020] The disperser is a double-shaft disperser.

[0021] The beneficial effects of the utility model are as follows:

[0022] The utility model has a compact and reasonable structure and is easy to operate. By arranging a main discharge pipe, a connecting pipe group and multiple dispersers, the multiple dispersers are independently controlled, so that the multiple dispersers can be switched alternately during pulping, thereby continuously pulping, and the pulping efficiency can be improved. The twin-screw kneading machine does not need to use a long screw, thereby effectively reducing the metal particles generated during pulping and improving the pulp quality.

[0023] The utility model also has the following advantages:

[0024] (1) The length-to-diameter ratio of the inner screw of the twin-screw kneader of the present invention is ≤32. Within this length range, the problem of excessive metal grinding chips inside the twin-screw kneader during operation can be avoided, thereby improving the pulping quality.

[0025] (2) The utility model can be provided with a plurality of independently controlled and independently working dispersers, and the plurality of dispersers are alternately fed and operated, thereby improving the pulping efficiency, realizing continuous pulping, compacting the production rhythm, and improving the production efficiency.

[0026] (3) The utility model adopts a loss-in-weight scale to weigh the powder to be put in, thereby achieving accurate quantitative feeding.

[0027] (4) The utility model provides an inverted cone-shaped collecting bin, which can prevent powder leakage and improve powder feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0029] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0030] Figure 3 It is a schematic diagram of the utility model in working state.

[0031] Among them: 1. driving motor; 2. twin-screw kneading machine; 3. first kneading inlet; 4. second kneading inlet; 5. kneading outlet; 6. collecting bin; 7. powder feeding tank; 8. conveying pump; 9. three-way valve; 10. main outlet pipeline; 11. connecting pipe group; 12. disperser. DETAILED DESCRIPTION

[0032] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0033] The structure and functions of the utility model are as follows:

[0034] like Figure 1-Figure 3 As shown, a twin-screw pulping system includes a twin-screw kneading device, wherein the feeding end of the twin-screw kneading device is connected to a feeding unit, and the discharging end of the twin-screw kneading device is connected to a discharging main pipeline 10, and at least two groups of connecting pipe groups 11 are installed at intervals on the discharging main pipeline 10, one end of a single group of connecting pipe groups 11 is installed in cooperation with the discharging main pipeline 10 through a three-way valve 9, and at the same time, the other end is connected to the feeding end of a disperser 12, and the multiple dispersers 12 are independent of each other; the feeding unit feeds powder and liquid into the twin-screw kneading device, and the twin-screw kneading device stirs the powder and liquid to obtain a first mixed material, and the first mixed material flows into the corresponding disperser 12 through the discharging main pipeline 10 and the connecting pipe group 11 to obtain a second mixed material. The twin-screw pulping system of the utility model includes a twin-screw kneading device, a three-way valve 9, a main discharge pipeline 10, a connecting pipe group 11, and a disperser 12, which can enable the pulping system to achieve efficient pulping. By setting the disperser 12, the length of the screw inside the twin-screw kneading device can be shortened, and the friction between the screw length that is too long and the inner wall of the barrel of the twin-screw kneading device can be avoided, which leads to excessive metal grinding chips inside the twin-screw kneading device when it is working, thereby improving the pulping quality.

[0035] In the utility model, the length-to-diameter ratio of the screw inside the twin-screw kneading equipment is ≤32.

[0036] The twin-screw kneading device comprises a driving motor 1, the output end of the driving motor 1 is connected to a twin-screw kneading machine 2;

[0037] In the utility model, a first kneading inlet 3, several second kneading inlets 4 and a kneading outlet 5 are respectively arranged on the barrel of the twin-screw kneading machine 2;

[0038] The first kneading feed port 3 is matched with an inverted cone-shaped collecting bin 6, and the first kneading feed port 3 and the second kneading feed port 4 correspond to the feed end of the twin-screw kneader 2; the kneading discharge port 5 corresponds to the discharge end of the twin-screw kneader 2;

[0039] The feeding unit includes a powder feeding tank 7 and a liquid supply system. The powder feeding tank 7 feeds the powder into the twin-screw kneading machine 2, and the liquid supply system feeds the liquid into the twin-screw kneading machine 2.

[0040] The first kneading feed port 3 is opened at the head end of the barrel of the twin-screw kneader 2;

[0041] The powder feeding tank 7 adopts a loss-in-weight scale to achieve accurate feeding. The discharge port of the powder feeding tank 7 is connected to the first kneading feed port 3 through the collecting bin 6, so that the powder is fed into the interior of the twin-screw kneader 2. The inverted cone-shaped collecting bin 6 can prevent powder leakage and improve the powder feeding efficiency.

[0042] The discharge end of the liquid supply system is connected to the second kneading feed port 4, which is arranged on the barrel wall of the twin-screw kneader 2 and along its length, so that a variety of liquid materials can be fed and supplemented;

[0043] The kneading outlet 5 can be opened at the tail end of the barrel of the twin-screw kneading machine 2 , and can be opened at the top or bottom of the barrel of the twin-screw kneading machine 2 .

[0044] A delivery pump 8 is installed on the discharge main pipeline 10 , and the delivery pump 8 provides delivery power and can deliver the material in the discharge main pipeline 10 to the disperser 12 .

[0045] The disperser 12 is provided with a disperser inlet and a disperser outlet; the disperser inlet corresponds to the feed end of the disperser 12, and the disperser outlet corresponds to the discharge end of the disperser 2. The disperser outlet can be connected to an external storage tank to store the prepared slurry.

[0046] In the present utility model, the disperser 12 adopts a double-shaft disperser, and the disperser 12 includes a first internal motor, a second internal motor, a planetary transmission box, a dispersion shaft, a dispersion disk and a dispersion container;

[0047] The output end of the first internal motor is connected to the planetary transmission box, and can drive the planetary transmission box to rotate. The second internal motor is installed inside the planetary transmission box. The output end of the second internal motor is connected to the dispersion shaft. The dispersion shaft is located outside the planetary transmission box. At least one dispersion disk is installed on the outer circumferential surface of the dispersion shaft. The second internal motor drives the dispersion shaft to rotate;

[0048] The planetary transmission box is driven to rotate by the first internal motor, thereby driving the dispersion disk to revolve through the dispersion shaft, and the transmission shaft is driven to rotate by the second internal motor, thereby driving the dispersion disk to rotate. The dispersion disk has the functions of rotation and revolution, which can greatly improve the dispersion efficiency.

[0049] like Figure 1-Figure 3 As shown, in the utility model, a plurality of dispersers 12 can be provided according to actual use requirements. The plurality of dispersers 12 are independently controlled and work independently. In order to improve the pulping efficiency and realize continuous pulping, the plurality of dispersers 12 can work alternately, thereby compacting the production rhythm and improving the production efficiency.

[0050] The three-way valve 9 is used to switch the flow direction of the first mixed material.

[0051] The working process of the utility model is as follows:

[0052] like Figure 3 As shown, Figure 3 In the figure, the arrows indicate the direction of material flow;

[0053] The powder feeding tank 7 accurately weighs various powder materials and quantitatively feeds them into the twin-screw kneading machine 2 through the first kneading feed port 3;

[0054] The liquid supply system feeds various liquid materials into the twin-screw kneader 2 through the second kneading feed port 4;

[0055] The driving motor 1 is started, and the driving motor 1 drives the screw in the twin-screw kneading machine 2 to rotate, so as to stir and mix the powder liquid and the liquid material in the twin-screw kneading machine 2 to obtain a first mixed material;

[0056] The first mixed material flows into the main discharge pipe 10 through the kneading discharge port 5;

[0057] Then, if Figure 3 As shown, Figure 3 The three-way valve 9 at the lower middle position is opened, and the other three-way valves 9 are closed. Under the action of the delivery pump 8, the first mixed material in the discharge main pipeline 10 flows into the connecting pipe group 11 corresponding to the lower three-way valve 9, and then flows into the disperser 12 (i.e. Figure 3 In the disperser 12 at the lower middle part, after the dispersing machine 12 is finished feeding, the corresponding three-way valve 9 is closed, and the dispersing machine 12 shears and disperses the first mixed material inside it, thereby obtaining a second mixed material, and the second mixed material flows out of the dispersing machine 12 through the dispersing outlet on the dispersing machine 12 and enters the subsequent equipment;

[0058] Figure 3When the dispersing machine 12 in the middle and lower part is finished feeding, the corresponding three-way valve 9 is closed, and the other three-way valve 9 is opened, and the first mixed material in the discharge main pipeline 10 flows into the connecting pipe group 11 corresponding to the other three-way valve 9, and then flows into the dispersing machine 12 connected to the connecting pipe group 11, and the dispersing machine 12 is fed. During the feeding process of the dispersing machine 12, the other dispersing machine 12 (i.e. Figure 3 The disperser 12 in the middle and lower part performs high-speed shearing and dispersion of the first mixed material inside thereof;

[0059] When more than two dispersers are provided in the twin-screw pulping system, it is ensured that only one three-way valve 9 on the discharge main line 10 is opened at the same time, and the other three-way valves 9 are closed, so that the dispersers 12 in the twin-screw pulping system are fed alternately to achieve continuous and efficient pulping.

[0060] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A twin-screw pulping system, comprising a twin-screw kneading device, characterized in that: The feeding end of the twin-screw kneading device is connected to a feeding unit, and the discharging end of the twin-screw kneading device is connected to a discharging main pipeline (10). At least two groups of connecting pipes (11) are installed on the discharging main pipeline (10) at intervals. One end of a single group of connecting pipes (11) is installed in coordination with the discharging main pipeline (10) through a three-way valve (9), and the other end is connected to the feeding end of a disperser (12). The multiple dispersers (12) are independent of each other. The feeding unit feeds the powder and the liquid into a twin-screw kneading device, and the twin-screw kneading device stirs the powder and the liquid to obtain a first mixed material. The first mixed material flows into a corresponding disperser (12) through a discharge main pipeline (10) and a connecting pipe group (11) to be dispersed to obtain a second mixed material.

2. A twin-screw pulping system according to claim 1, characterized in that: The length-to-diameter ratio of the screw inside the twin-screw kneading device is ≤32.

3. A twin-screw pulping system according to claim 1, characterized in that: The twin-screw kneading device comprises a driving motor (1), and the output end of the driving motor (1) is connected to a twin-screw kneading machine (2).

4. A twin-screw pulping system as claimed in claim 3, characterized in that: The barrel of the twin-screw kneader (2) is respectively provided with a first kneading inlet (3), a plurality of second kneading inlets (4) and a kneading outlet (5); The first kneading feed opening (3) and the second kneading feed opening (4) correspond to the feed ends of the twin-screw kneader (2); The kneading discharge port (5) corresponds to the discharge end of the twin-screw kneader (2).

5. A twin-screw pulping system as claimed in claim 4, characterized in that: The first kneading feed port (3) is matched with an inverted cone-shaped material collection bin (6).

6. A twin-screw pulping system according to claim 1, characterized in that: The feeding unit comprises a powder feeding tank (7) and a liquid supply system. The powder feeding tank (7) feeds powder into the twin-screw kneading device, and the liquid supply system feeds liquid into the twin-screw kneading device.

7. A twin-screw pulping system according to claim 6, characterized in that: The powder feeding tank (7) adopts a loss-in-weight scale.

8. A twin-screw pulping system according to claim 1, characterized in that: A delivery pump (8) is installed on the main discharge pipeline (10).

9. A twin-screw pulping system according to claim 1, characterized in that: The disperser (12) is provided with a dispersion inlet and a dispersion outlet; The dispersion feed port corresponds to the feed end of the disperser (12).

10. A twin-screw pulping system according to claim 1, characterized in that: The disperser (12) is a double-shaft disperser.