Accurate raw material mixing device for lithium carboxymethyl cellulose preparation
The lithium carboxymethyl cellulose preparation device, which features precise ingredient batching, high-speed mixing, and constant temperature control, solves the problems of insufficient ingredient accuracy, uneven mixing, and poor temperature control, thereby improving the consistency and chemical stability of the product.
Patent Information
- Application Number
- CN202520435574.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-13
AI Technical Summary
In existing lithium carboxymethyl cellulose preparation processes, insufficient ingredient precision, uneven mixing, and poor temperature control affect product consistency and chemical stability.
Precise ingredient dispensing is achieved by using a screw feeder combined with a weighing sensor, efficient mixing is achieved by using a stirring motor and an ultrasonic vibrator, and constant temperature control is achieved by using a temperature control jacket and a heating rod.
It achieves precise proportioning of powder and liquid, efficient dispersion and uniform mixing of slurry, and improves the solubility and chemical stability of lithium carboxymethyl cellulose.
Smart Images
Figure CN223931105U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium carboxymethyl cellulose preparation technology, and in particular to a precise mixing device for raw materials in the preparation of lithium carboxymethyl cellulose. Background Technology
[0002] Lithium carboxymethyl cellulose (CMC-Li) is a key binder in lithium-ion batteries, and its preparation process requires extremely high precision in raw material mixing, temperature control, and proportioning. Existing mixing devices suffer from the following problems:
[0003] First, the accuracy of ingredient mixing is insufficient: traditional feeding mechanisms rely on manual or simple mechanical control, which can easily lead to deviations in the ratio of powder to liquid, affecting product consistency.
[0004] Secondly, uneven mixing: the simple stirring mechanism makes it difficult to disperse the agglomerated particles in the high-viscosity slurry, resulting in uneven concentration in some areas.
[0005] In addition, the temperature control is poor: the temperature fluctuates greatly during the reaction, which affects the solubility and chemical stability of CMC-Li. Utility Model Content
[0006] To address the shortcomings of existing technologies, this invention provides a precise mixing device for the preparation of lithium carboxymethyl cellulose raw materials, which overcomes the deficiencies of existing technologies and effectively solves the problems of insufficient batching accuracy, uneven mixing, and poor temperature control.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A precision mixing device for preparing lithium carboxymethyl cellulose raw materials includes a mixing tank, a powder tank is provided on one outer wall of the mixing tank, and a precision dispensing mechanism is provided on the outer walls of the powder tank and the mixing tank. The precision dispensing mechanism includes a screw feeder installed at the bottom of one outer wall of the powder tank, a weighing box provided at the top of the mixing tank, a first solenoid valve installed on the bottom outer wall of the weighing box, and a weighing sensor fixedly connected to one outer wall of the weighing box.
[0009] The mixing tank is equipped with a temperature control jacket, and symmetrically distributed ultrasonic vibrators are installed on the outer wall of the temperature control jacket. One end of the ultrasonic vibrator is located inside the mixing tank. A stirring motor is fixedly connected to the center of the outer wall of the top of the mixing tank by screws, and the output shaft of the stirring motor is fixedly connected to a stirring rod by a coupling. Stirring blades and a dispersing disc are respectively provided on the outer wall of the stirring rod.
[0010] Preferably, the weighing sensor is fixedly connected to the top outer wall of the mixing tank by screws.
[0011] Preferably, a liquid supply pipe is fixedly connected to the outer wall of the top of the mixing tank, and a second solenoid valve and a flow meter are installed on the outer wall of the liquid supply pipe.
[0012] Preferably, a discharge pipe and a valve are installed on the outer wall of the bottom of the mixing tank.
[0013] Preferably, a heating rod is installed on the inner wall of the temperature control jacket, and a heating rod is installed on the outer wall of the temperature controller. The heating rod and the temperature controller are connected by a signal line.
[0014] Preferably, a column is fixedly connected to the bottom outer wall of the powder tank.
[0015] The beneficial effects of this utility model are as follows:
[0016] 1. The precise mixing device for preparing lithium carboxymethyl cellulose raw materials designed in this paper uses a screw feeder to control the powder conveying rate and combines a weighing sensor to monitor the powder weight in real time, ensuring that the powder and liquid are added in a preset ratio. After the weighing box receives the powder, the first solenoid valve opens and closes precisely according to the weighing sensor signal to avoid overfeeding, thus having the characteristics of precise batching.
[0017] 2. The precision mixing device for preparing lithium carboxymethyl cellulose raw materials designed in this paper uses a stirring motor to drive the stirring blades to shear the slurry and a high-speed rotating dispersion disc to break up particle agglomeration. Furthermore, the high-frequency vibration of the ultrasonic vibrator generates micro-jet flow to further refine the particles and accelerate dissolution, thus featuring a highly efficient mixing and dispersion system.
[0018] 3. The precise mixing device for preparing lithium carboxymethyl cellulose raw materials designed in this invention uses a heating rod in the temperature control jacket and a temperature controller to adjust the temperature in real time, maintaining a constant temperature in the reaction system. The temperature controller automatically starts and stops heating according to preset parameters, reducing the error range and improving the solubility and chemical stability of CMC-Li. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of a precision mixing device for preparing lithium carboxymethyl cellulose raw materials proposed in this utility model;
[0020] Figure 2 This is a schematic diagram of the precision batching mechanism of a precision mixing device for preparing lithium carboxymethyl cellulose raw materials proposed in this utility model;
[0021] Figure 3 This is a schematic diagram of the internal structure of the mixing tank of a precision mixing device for preparing lithium carboxymethyl cellulose raw materials proposed in this utility model.
[0022] In the diagram: 1. Mixing tank; 2. Powder tank; 3. Precision batching mechanism; 31. Screw feeder; 32. Weighing box; 33. First solenoid valve; 34. Weighing sensor; 4. Temperature control jacket; 5. Ultrasonic vibrator; 6. Stirring motor; 7. Stirring rod; 8. Stirring blade; 9. Dispersion disc; 10. Liquid supply pipe; 11. Second solenoid valve; 12. Flow meter; 13. Discharge pipe; 14. Valve; 15. Heating rod; 16. Temperature controller; 17. Column. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0024] Example 1, refer to Figure 2 A precision mixing device for preparing lithium carboxymethyl cellulose raw materials includes a mixing tank 1, a powder tank 2 disposed on one side of the outer wall of the mixing tank 1, and a precision dispensing mechanism 3 disposed on the outer walls of the powder tank 2 and the mixing tank 1. The precision dispensing mechanism 3 includes a screw feeder 31 installed at the bottom of one side of the outer wall of the powder tank 2, a weighing box 32 disposed at the top of the mixing tank 1, a first solenoid valve 33 installed on the bottom outer wall of the weighing box 32, and a weighing sensor 34 fixedly connected to one side of the outer wall of the weighing box 32.
[0025] In this embodiment, the screw feeder 31 can control the powder conveying rate, and the weighing sensor 34 monitors the powder weight in real time to ensure that the powder and liquid are added in a preset ratio. After the weighing box 32 receives the powder, the first solenoid valve 33 opens and closes precisely according to the signal of the weighing sensor 34 to avoid overfeeding, thus having the characteristic of precise feeding.
[0026] Example 2, refer to Figure 3 A precise mixing device for preparing lithium carboxymethyl cellulose raw materials is provided. The mixing tank 1 is provided with a temperature control jacket 4, and ultrasonic vibrators 5 are symmetrically distributed on the outer wall of the temperature control jacket 4. One end of the ultrasonic vibrator 5 is located inside the mixing tank 1. A stirring motor 6 is fixedly connected to the center of the top outer wall of the mixing tank 1 by screws, and the output shaft of the stirring motor 6 is fixedly connected to a stirring rod 7 by a coupling. Stirring blades 8 and a dispersing disc 9 are respectively provided on the outer wall of the stirring rod 7.
[0027] In this embodiment, the stirring motor 6 drives the stirring blades 8 to shear the slurry and the high-speed rotation of the dispersion disk 9 breaks up particle agglomeration. The high-frequency vibration of the ultrasonic vibrator 5 generates micro-jet, which further refines the particles and accelerates dissolution. It has the characteristics of a highly efficient mixing and dispersing system. The heating rod 15 in the temperature control jacket 4 works with the temperature controller 16 to adjust the temperature in real time and maintain the constant temperature of the reaction system. The temperature controller 16 automatically starts and stops heating according to preset parameters, reducing the error range and improving the solubility and chemical stability of CMC-Li.
[0028] Reference Figure 2 The weighing sensor 34 is fixedly connected to the top outer wall of the mixing tank 1 by screws.
[0029] Reference Figure 3 A liquid supply pipe 10 is fixedly connected to the outer wall of the top of the mixing tank 1, and a second solenoid valve 11 and a flow meter 12 are installed on the outer wall of the liquid supply pipe 10.
[0030] Reference Figure 3 The bottom outer wall of the mixing tank 1 is equipped with a discharge pipe 13 and a valve 14.
[0031] Reference Figure 1 A heating rod 15 is installed on the inner wall of the temperature control jacket 4, and a heating rod 15 is installed on the outer wall of the temperature controller 16. The heating rod 15 and the temperature controller 16 are connected by a signal line.
[0032] Reference Figure 1 A column 17 is fixedly connected to the bottom outer wall of the powder tank 2.
[0033] Working principle: The CMC raw material in the powder tank 2 is conveyed to the weighing box 32 by the screw feeder 31. The weighing sensor 34 monitors the weight in real time. After the preset value is reached, the first solenoid valve 33 is opened. At the same time, the liquid supply pipe 10 opens the second solenoid valve 11. The solvent is quantitatively injected into the mixing tank 1 through the flow meter 12. Then the stirring motor 6 is started. The stirring rod 7 drives the stirring blade 8 and the dispersing disk 9 to rotate, initially shearing the slurry. At the same time, the ultrasonic vibrator 5 is turned on to eliminate small agglomerates. On this basis, the heating rod 15 maintains the temperature of the mixing tank at 60±1℃ through the temperature controller 16. Stirring is continued for 30 minutes until CMC-Li is completely dissolved. Finally, the valve 14 is opened and the finished slurry is discharged through the discharge pipe 13.
[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A precision mixing device for preparing lithium carboxymethyl cellulose raw materials, comprising a mixing tank (1), characterized in that, A powder tank (2) is provided on one side of the mixing tank (1), and a precision batching mechanism (3) is provided on the outer walls of the powder tank (2) and the mixing tank (1). The precision batching mechanism (3) includes a screw feeder (31) installed at the bottom of one side of the outer wall of the powder tank (2), a weighing box (32) installed at the top of the mixing tank (1), a first solenoid valve (33) installed on the bottom outer wall of the weighing box (32), and a weighing sensor (34) fixedly connected to one side of the outer wall of the weighing box (32). The mixing tank (1) is provided with a temperature control jacket (4) on the outside, and ultrasonic vibrators (5) are symmetrically distributed on the outer wall of the temperature control jacket (4). One end of the ultrasonic vibrator (5) is located inside the mixing tank (1). A stirring motor (6) is fixedly connected to the center of the top outer wall of the mixing tank (1) by screws. The output shaft of the stirring motor (6) is fixedly connected to a stirring rod (7) by a coupling. Stirring blades (8) and a dispersing disc (9) are respectively provided on the outer wall of the stirring rod (7).
2. The precise mixing device for preparing lithium carboxymethyl cellulose raw materials according to claim 1, characterized in that, The weighing sensor (34) is fixedly connected to the top outer wall of the mixing tank (1) by screws.
3. The precise mixing device for preparing lithium carboxymethyl cellulose raw materials according to claim 1, characterized in that, The mixing tank (1) is fixedly connected to the top outer wall of the liquid supply pipe (10), and a second solenoid valve (11) and a flow meter (12) are installed on the outer wall of the liquid supply pipe (10).
4. The precise mixing device for preparing lithium carboxymethyl cellulose raw materials according to claim 1, characterized in that, The mixing tank (1) is equipped with a discharge pipe (13) and a valve (14) on the bottom outer wall.
5. The precise mixing device for preparing lithium carboxymethyl cellulose raw materials according to claim 1, characterized in that, A heating rod (15) is installed on the inner wall of the temperature control jacket (4), and a heating rod (15) is installed on the outer wall of the temperature controller (16). The heating rod (15) and the temperature controller (16) are connected by a signal line.
6. The precise mixing device for preparing lithium carboxymethyl cellulose raw materials according to claim 1, characterized in that, A column (17) is fixedly connected to the bottom outer wall of the powder tank (2).