DTB Type Crystallizer

Working Principle

1. Structural Components

• Draft Tube: Centralized circulation driven by a low-speed propeller pump (≤25–50% solids content).

• Annular Baffle: Separates fines (d < dcritical) into an external loop for dissolution via heating/dilution.

• Heat Exchanger: Supplies thermal energy for evaporation while minimizing encrustation.

2. Operational Process

• Slurry circulates upward in the draft tube and descends through the baffle zone.

• Clarified solution in the external loop is superheated to dissolve fines, promoting growth of remaining crystals.

• Vacuum cooling or moderate evaporation controls supersaturation.

Core Advantages

1. Crystal Quality

• Large Crystals: D50=0.8–3mm with minimal attrition.

• Fines Destruction: Internal/external loops dissolve small particles for uniform growth.

2. Efficiency & Stability

• Low Energy Input: Reduced pressure drop and slow-speed agitation cut energy use.

• Longevity: Anti-scaling design ensures 3,000+ hours of continuous operation.

3. Flexibility

• Process Modes: Vacuum cooling (no external loop) or evaporative crystallization.

• Suspension Control: Adjustable slurry density (25–50%) for diverse viscosities.

Technical Parameters

Application Fields

• Chemicals: Ammonium sulfate, potassium chloride, sodium carbonate decahydrate.

• Pharmaceuticals: Antibiotics, amino acids.

• Food: Monosodium glutamate (MSG), citric acid.

• Fertilizers: Monoammonium phosphate (MAP).

Design Features

• PLC Control: Precise temperature and circulation management.

• Demister System: Internal/external for vapor-liquid separation.

• Compact Layout: Space-efficient modular construction.

Service Support

• Customization: CFD flow simulation and tailored process layouts.

• Turnkey Solutions: Installation, commissioning, and operator training.

• 24/7 Maintenance: Spare parts and technical support for continuous operation.

Specifications adapt to material properties and process needs. Contact us for detailed configurations.