What are the key design considerations for a spray dryer?

Key considerations include: Atomizer selection (rotary, pressure, or two-fluid nozzle) affecting droplet size and distribution; Air flow pattern (co-current, counter-current, or mixed) based on product heat sensitivity; Inlet/outlet temperatures - higher inlet improves efficiency but may damage product; Residence time - typically 5-30 seconds; Chamber geometry - height-to-diameter ratio affects particle trajectories; Product recovery system (cyclones, bag filters, scrubbers) for fine particles.