Urea Granulation
Summary
TOYO improved design of the granulator by applying the Spout-Fluid Beds for the granulator, which is a combination of the spouted beds and fluidizing beds and reduces energy requirements and improves the quality of the product granules.
Features
TOYO’s Spout Fluid Bed Granulation Process has following features.
1. High Energy Efficiency (Low Power Consumption)
- No requirement of compressed atomizing air for granulator
- Seed circulation at moderately high temperature minimizes cooling air requirement and heat removal in the
process
- Optimal bed depth minimizes pressure loss in the granulator
- Uniquely designed low pressure drop dust scrubber
2. High Product Quality
- Rapid cooling of granules in the granulator with minimum residence time reduces biuret formation to
negligibly small
- Efficient drying in the granulator reduces granule moisture low enough to increase product hardness
- Optimal combination of spouted bed and fluidized bed produces round and uniform granules
3. Low Emission
- Optimal spouted bed air velocity minimizes dust formation in the granulator
- Uniquely designed (Packed Bed type) low pressure-loss dust scrubber reduces urea dust to less than
30 mg/Nm³
Process Flow Diagram of Granulation
