Overview of the Spin Flash Drying Process

Patented Technology and Global Reach

Widely acclaimed by customers across a variety of industries worldwide, this patented process offers a faster and more energy-efficient alternative to spray drying. With more than 350 spin flash dryer installations worldwide, SPX FLOW combines experience with cutting-edge technology to deliver value-added solutions for our customers.

Key Components of the System

Feed System

The feed system consists of a feed vat, where a discontinuous flow of product is buffered and fragmented by an agitator prior to continuous drying. A variable-speed feed screw (or a pump, in the case of fluid feed) forwards the product to the drying chamber.

Drying Chamber

The rotor at the conical base of the drying chamber fluidizes product particles in a drying-efficient hot airflow pattern, in which any wet lumps are rapidly disintegrated. Hot air is supplied by a temperature-controlled air heater and a speed-controlled fan, entering the drying chamber at a tangent to establish a turbulent, whirling airflow.

Airborne fine particles pass through a classifier at the top of the drying chamber, while larger particles remain in the airflow for further drying and powdering.

The drying chamber is rigidly designed to withstand pressure shocks in the event of explosive combustion of flammable particles. All bearings are effectively protected against dust and heat.

Bag Filter

Powder from the drying chamber is collected in the bag filter, while the outlet air exits the system at the top via a suction fan.

Special Features and Innovations

Our patented spin flash plant features an inverted cone for high-velocity air inlet at the base of the drying chamber, preventing the risk of product build-up. This unique technique has proven to be the customer-preferred method for drying paste in the industrial sector.

State-of-the-art automation systems are available for spin flash drying plants, enabling fully automatic control, process optimization, data logging, traceability and maintenance scheduling.

Capacity Profile

• 1 kg/h to 40 tons/h

Advantages

• High drying efficiency, resulting in low energy costs
• Continuous processing with short processing times
• Low operator overheads and minimal maintenance costs
• Controlled residence time, enabling high-temperature drying
• Controlled particle size
• Very fine powder production, eliminating the need for milling
• Minimal space requirements
• High-pressure, shock-resistant chamber for safe drying of flammable products
• Available in FDA- and cGMP-compliant configurations

Key Applications

• Agrochemicals
• Ceramics
• Food and feed products
• Inorganic chemicals
• Organic chemicals
• Pharmaceuticals
• Pigments and dyestuffs
• Waste products