RINA-JET Turbo-Dryers

Western States - RINA-JET Turbo-DryerThe purpose of the RINA-JET Turbo-Dryer manufactured by Riera Nadeu, S. A. of Barcelona, Spain is to simultaneously dry and disintegrate agglomerations of particles to their original dimensions. The RINA-JET Turbo-Dryer can be used to dry solutions, suspensions and pastes, as well as moist cakes after decantation, filtration and centrifugation.

Features & Benefits

  • Instantaneous and Continuous Drying System
  • Preservation of Original Particle Size with Minimal Heat Exposure
  • Fully Automatic & Adaptable to Space Requirements
  • Low Maintenance & Low Operating Costs
  • Closed System for Efficient Solvent Recovery

Theoretical Description of the RINA-JET Turbo Dryer

In Zone 1, (see attached diagram), known as the spraying area, the particles are dispersed or atomized to their original size. The dispersion takes place by injecting heated low pressure air or inert gas known as the drying fluid into the lower drying chamber by a series of low pressure nozzles. The nozzles are positioned so that high velocity collisions between the particles occur immediately, thus breaking apart the agglomerations and creating increasing the particle’s surface area.

Products which have relatively low moisture content (wet solid cakes); the low pressure drying fluid is sufficient for dispersion. Products which have higher levels of moisture (solutions, suspensions and pastes) an additional drying fluid may be is required which is known as the atomizing fluid. The atomizing fluid is compressed air or inert gas which is injected by a special high pressure nozzle to facilitate the dispersion of the particles. Suspensions, solutions and pastes are introduced to the dryer’s spraying area with a dispersing nozzle. Wet solid cakes can be introduced to the spraying area by a rotary valve, feed auger or venturi system.

In Zone 2, (see attached diagram), known as the drying zone, heat transfer and mass transfer take place simultaneously between the dispersed product and the drying fluid. The particle’s surface moistureis transferred to the hot gas (mass transfer or evaporation) as the particles are heated through contact with the gas (heat transfer). Due to the small dimensions of the particles and the high degree of air turbulence, the heat and mass exchanges are extremely rapid, nearly instantaneous.

In Zone 3, (see attached diagram) the outer surface of the particle is dry but internal moisture still exists. The high rate of speed the particles are moving through the zone promotes the migration of the internal moisture to the outer surface to allow continuation of the evaporation process as described above.

In Zone 4, (see attached diagram), known as the classification area, the larger particles (high inertia) are directed to the outer walls of the dryer by the centrifugal forces generated by the recirculating drying fluid. The smaller particles (low inertia) remain in the hot moist drying fluid. The larger particles (high inertia) return to the drying zone for removal of the remaining internal moisture which has not had the time to migrate to the particle’s surface thus; the larger mass. The smaller particles (low inertia) lack the energy to move towards the drying zone there by escaping through the outlet with the drying fluid for separation by a vortex separation system.

RINA-JET Turbo-Dryer Diagram

Western States - RINA-JET Turbo-Dryer Diagram

Technical Specifications

Western States - RINA-JET Turbo-Dryer Technical Specifications