● Engineering Overview:
High-nickel ternary cathode material is a new type of cathode material that is promising to replace lithium cobaltate in electronic products and to be mixed with lithium manganese in power applications due to its good tolerance to high voltage, as well as its high gram capacity, and low cobalt content, among other advantages. At the same time, the compaction density of ternary material has been the bottleneck of limiting its energy density to exceed that of lithium cobaltate, but purely by increasing the nickel content will make the stability of the material problematic, and the increase of water absorption also leads to further increase in the difficulty of material processing. At the same time, high nickel content limits the development trend of high voltage of ternary materials. Therefore, how to improve the compaction density and voltage tolerance on the basis of ensuring the stability of the material is a realistic and significant issue. To be able to successfully prepare ternary materials with energy density close to or exceeding that of medium and high-end lithium cobaltate is again what the market is looking forward to.
-Project description:
The single cone screw belt vacuum dryer production line for high nickel ternary cathode materials is designed by Changzhou Jinwang Drying for the production process of materials and drying characteristics of products in the lithium industry, taking into account the practicability, stability and economy, and special design in terms of energy-saving and high-efficiency of the equipment, so as to bring the performance of the whole set of equipment to the excellent level in the industry.
●Description of equipment:
High-nickel ternary cathode material single cone screw belt vacuum dryer production line is mainly composed of rotary joint, reducer, trap, condensate collection well, frame, thermometer, vacuum sampling valve, discharge valve and other parts.
When the equipment is running, it is motor-driven with a unique design, where the screw driven by the motor operation is used to lift the material without the energy consumption used separately for discharging the material. Especially worth explaining is that in the mixing and drying process, the traditional mixing and drying equipment is provided with a belt-type stirring paddle.
Its working principle is: stirring movement, the movement of the material as a whole, a large number of energy consumption is used for the overall material for circular movement, so the drying efficiency provided by this mixing is low. The LDG series of spiral vacuum drying provides a cone-type spiral stirring, the whole stirring paddle around the axis of the conical bin for circular motion, to ensure that different parts of the container can be stirred, with the spiral stirring, gradually lift the material at the bottom of the bin to the upper part of the container, and then by its natural descent, and so on.
This mixing mode makes the materials in the container get fully mixed evenly, eliminates the possibility of material caking in the drying process, and greatly improves the mixing and drying efficiency of the materials. And it has the advantages of wider range of processing capacity and low energy consumption per unit mass.
● Equipment structure features and functions:
1. The equipment adopts internal heating of jacket and screw belt, which increases the overall heating area of the equipment by about 30%.
2. The single screw belt stirrer adopted by the equipment can realize the effect of bottom-up circulation stirring, and can get efficient forced heat transfer performance. The material loading rate of 40%~80%, can get 100% heating utilization, suitable for mixing and drying of delicate materials.
3. Fully sealed system, no foreign matter pollution, high cleanliness, especially suitable for mixing and drying of pharmaceutical intermediates and APIs, and also suitable for mixing and drying of aseptic APIs.
4. Small gap between single screw belt stirrer and vessel wall, which can effectively prevent the material from sticking on the surface of vessel wall.
5. Adopting small angle conical cylinder structure, which makes the discharging speed fast, clean and no accumulation of materials.
6. Configured with a backwash device: in the material drying process due to material drying and dust adsorption on the vacuum trap, blocking the vacuum channel, the gas channel is not smooth directly leads to the drying time is extended. The lower the temperature of the material in the drying process, the shorter the drying time, the quality of the material by.
● Advantages of the equipment:
1, the working process of the equipment for intermittent batch operation, wet materials into the silo, through the cylinder wall jacket and the propeller internal heat to the heat, so that the heat area to the entire container area of 130%, the material for warming and drying. And select the corresponding cone dryer mixer model (working volume) to achieve the ideal drying effect. Adopting upward-driven structure of the mixing dryer with high efficiency drying, mixing capacity at the same time, with ample space, more convenient for the user to carry out maintenance characteristics of overhaul.
2、Smooth operation and protection of crystal form. In the drying and mixing process without the use of any auxiliary tools, only the use of cone-type stirring spiral rotation, which makes the material in addition to the lifting from the stirring spiral and constantly get shear and dispersion, to ensure that all the materials in the silo can get the full movement, and can make the material in addition to the lifting from the spiral slurry, not subject to any other external extrusion, avoiding the powder and the equipment and the powder Avoid the ineffective friction between powder and equipment as well as powder grains.
3、Top drive, eliminating the possibility of contamination brought by the shaft seal to the product. Using the top drive, relative to the bottom drive, the device can avoid the following drawbacks: the mixing paddle must be used to dismantle the equipment for cleaning, maintenance of the mixing paddle shaft sealing is difficult to do really seal pollution-free, lack of quality assurance.
4, low operating energy costs, high mixing efficiency.
5、Simple operation and easy maintenance. Equipment structure is simple and effective, easy to understand the operator, button control makes the operation process very simple. Some maintenance work can be done smoothly and quickly even in the absence of specialized personnel, and the manhole set up can easily adjust and maintain the motion screw, which can be completed without complicated disassembly.
6, the equipment has very few wearing parts, bearing box and other drive units are set on the top of the silo, users can easily dismantle the whole unit during maintenance, and the drive unit on the top of the location of the space is also more plentiful.
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