Process Flow of Spray Pyrolysis Granulation
The spray pyrolysis granulation process primarily includes the following steps:
Raw Material Preparation:
– Raw Material Selection: Based on the product’s needs and performance requirements, appropriate metal salts, oxides, organic compounds, and other starting materials are selected. For example, when preparing battery materials, a corresponding metal salt solution may be used.
– Solution Preparation: Dissolve the selected raw materials in a solvent according to a specific ratio to form a uniform solution. The solvent selection should consider factors such as volatility, solubility, and compatibility with the raw materials. Water, ethanol, and acetone are commonly used solvents.
Spray Atomization:
– Atomizer Selection: Select an appropriate atomizer based on the production scale and product requirements. Common atomizers include pressure atomizers, centrifugal atomizers, and ultrasonic atomizers.
– Atomization: The prepared solution is converted into fine droplets through the atomizer. Pressure atomizers use high-pressure gas or liquid to squeeze out a solution and break it into droplets. Centrifugal atomizers use a high-speed rotating disc to throw the solution out to form droplets. Ultrasonic atomizers use ultrasonic vibrations to break the solution into droplets. The size of the atomized droplets generally ranges from a few microns to tens of microns.
Pyrolysis Reaction:
– Pyrolysis Equipment Selection: Tubular furnaces and fluidized bed reactors can be used as pyrolysis equipment. Tubular furnaces have a simple structure and easy temperature control, making them suitable for small-scale production and laboratory research. Fluidized bed reactors offer excellent heat and mass transfer performance and are suitable for large-scale production.
– Pyrolysis Process: Atomized droplets are introduced into the pyrolysis equipment, where the pyrolysis reaction occurs under high temperature. Pyrolysis temperature, time, and atmosphere are adjusted according to the properties of the feedstock and product requirements. During the pyrolysis process, the solvent evaporates rapidly, and the feedstock undergoes chemical reactions such as decomposition, oxidation, and reduction, forming solid particles.
Particle Collection:
– Collection Device: A particle collection device, such as a cyclone separator, bag filter, or electrostatic precipitator, can be installed at the outlet of the pyrolysis equipment to collect the particles generated by pyrolysis.
– Cooling: The collected particles are typically hot and require cooling. Natural cooling, air cooling, or water cooling can be used to reduce the temperature of the particles to room temperature or the desired temperature.
Post-Processing:
– Screening and Classification: The collected particles are screened and classified to remove oversized and undersized particles, resulting in a product with a uniform particle size distribution.
– Surface Treatment: Based on product requirements, the particles are treated with surface treatments such as coating and modification to enhance their performance and application range.
About Cheersonic
Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.
Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.
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