Centrifugal Two-Fluid Dual-Purpose Spray Dryer – 5 kg/h Evaporation for Pharmaceutical Applications

• Centrifugal atomizer-based atomization system: Material liquid is pumped into the atomizer, where high-speed airflow from the nozzle’s annular gap disperses it into fine droplets. Droplet particle size is easily adjustable by modifying the gas-liquid ratio.

• Drying tower assembly: Constructed with a tower body, cone bottom, volute, gas distributor, and temperature sensors, this component is engineered with tailored atomization radius, residence time, and air volume based on evaporation needs and material characteristics. Operated under slight negative pressure to prevent material splashing during recovery, the tower’s upper section houses a hot air inlet with a volute and distributor that ensures uniform hot air distribution. This enables efficient heat exchange with mist droplets, converting them into dry powder products. Temperature sensors monitor and record both inlet and outlet air temperatures in real time.

• Material recovery system: Featuring a cyclone separator and bag filter, this system efficiently captures dried powder products. Post-drying, dust-laden gas first enters the cyclone separator for gas-solid separation, with collected powder falling into a collection barrel and cleaned gas moving to the bag filter. The filter then recovers any remaining ultrafine powder particles using high-performance cloth bags, maximizing material yield.

• PLC-based control system: Centered around a programmable logic controller (PLC), this system manages all critical functional components and triggers fault alarms as needed. It supports both automatic and manual operation modes to accommodate diverse processing requirements.

• Feeding system: Composed of a peristaltic pump and matching peristaltic tubes, this system ensures steady, controlled delivery of material liquids to the atomizer.

• Heating system: Integrated with an air filter, blower, and explosion-proof electric heater, this component supplies clean, temperature-controlled hot air for the drying process.

• Piping system: Constructed with induced draft fans and corrosion-resistant stainless steel pipes, this network facilitates smooth, efficient airflow throughout the entire spray drying unit.