Spray Dryer

A: Wall adhesion is controlled through three integrated engineering designs:

Wall Cooling Air Sweeps: Introducing secondary ambient or chilled air jackets around the cylindrical and conical sections to keep interior wall temperatures below the feed's glass transition or softening threshold (Tg).

CFD-Optimized Air Dispersers: Creating precise radial and axial swirl patterns that prevent high-velocity wet droplets from impacting hot metal surfaces before surface moisture evaporation occurs.

Pneumatic Knockers: Automated, interval-timed impactors positioned on critical cone transition areas to dislodge transient powder accumulation.

A: Rotary atomizers are selected when handling high-viscosity, abrasive, or high-solid-content slurries that risk clogging standard nozzles. They allow real-time particle size adjustment simply by modulating wheel RPM via VFD. Nozzle atomizers (pressure or two-fluid) are selected when strict, narrow particle size distributions (D50) or specific coarse/micro-fine granule dimensions are required by the process specification.

A: Solvent-based feeds require a Closed-Loop Inert Gas System using pure nitrogen as the drying medium instead of air. Exhaust gases pass through a surface condenser to recover solvent liquids, followed by a chilled dehumidification loop before being reheated and recirculated. Dual redundant oxygen sensors continuously monitor the atmosphere and automatically isolate the system if oxygen concentrations exceed pre-set safety limits.

A: Yes. Scale-up is calculated using established similitude criteria based on constant droplet residence time, inlet/outlet enthalpy balance, and gas-to-feed mass ratios. Client-supplied feed samples (>= 20 L) can be processed through pilot testing facilities to generate empirical baseline data (D50, bulk density, moisture content) prior to final industrial equipment design.

A: A comprehensive engineering documentation package is provided, including EN 10204 3.1 material certificates, welding logs, NDT inspection reports, instrument calibration records, electrical schematics, operating manuals, and international code declarations of conformity (CE / ASME compliant design criteria).

A: Standard utility requirements depend on scale, but typically include:

Electrical Supply: 3-phase, 380V to 480V, 50/60Hz sized for heavy-duty blower motors and heater banks.

Thermal Utilities: Natural gas line (minimum operating pressure 20 to 50 kPa), clean saturated steam (>= 0.8 MPa), or high-capacity electrical power.

Compressed Air: Clean, dry, oil-free instrument air (0.6 to 0.8 MPa) for pneumatics and control valves. Environmental/Ventilation: Ducting connection to plant scrubber or atmospheric exhaust that complies with local air quality emission limits.