A spray drying tower is a continuous industrial drying equipment that converts liquid feed(solution,suspension,emulsion,or paste)into dry powder/granules in one step.It atomizes liquid into fine droplets,which contact hot air for instant moisture evaporation,making it ideal for heat-sensitive materials and large-scale production.

Working Principle

Atomization:Liquid is pumped to the top atomizer(pressure nozzle/centrifugal disc)and dispersed into 20–100μm droplets.

Heat&Mass Transfer:Hot air(180–350°C)enters via a distributor,contacting droplets in co-current/counter-current flow.

Instant Drying:Moisture evaporates in 1–10 seconds;dry particles settle to the tower bottom.

Collection:Powders are collected by cyclone separators/bag filters;exhaust gas is purified and discharged.

Key Components

Atomizer:Core part;centrifugal(high yield)or pressure(uniform particles)types.

Drying Tower:Vertical cylinder(stainless steel/cast iron)with insulation;ensures sufficient residence time.

Hot Air System:Filter→heater→distributor;provides clean,stable hot air.

Material Collection:Cyclone+bag filter;recovery rate≥90%.

Control System:PLC-based;regulates temperature,feed rate,and airflow automatically.

Core Features

Instant Drying:Preserves activity of heat-sensitive materials(e.g.,food,pharmaceuticals).

High Efficiency:Continuous operation;evaporation capacity 50–5000 kg/h.

Uniform Quality:Controlled particle size(20–200μm),good flowability and solubility.

GMP Compliance:Sanitary design,easy cleaning,no dead corners.

Wide Adaptability:Handles various liquids;optional inert gas(nitrogen)for flammable materials.