Product characteristics

Urea granules produced in the fluid bed are a well rounded shape and very hard. They resist particularly well to crushing and abrasion and hence are dust free, non-caking and completely free flowing, even after long storage and numerous handling and shipment operations.

Specification (Typical)

  Standard Size Large Size
Total Nitrogen 46.3 % wt 46.3 % wt
Biuret 0.7 – 0.8 % wt 0.7 – 0.8 % wt
Moisture 0.2 % wt 0.3 % wt
Crushing Strength 3.5 kg (Ø: 3 mm) 10.0 kg (Ø: 7 mm)
Average Diameter 3.2 mm 6.3 mm
Size Distribution 95 % wt (2 - 4 mm) 95 % wt (4 - 8 mm)
Formaldehyde 0.45 % wt 0.45 % wt

Consumption figures

The consumption figures largely depend on the site climatic data, the local environmental requirements, the end product storage temperature as well as the overall plant energy management system.
The specific consumption figures tabled here are typical for a plant located under tropical climate, with stringent environmental regulations and with strong emphasis on product quality optimization.

Specific Consumption

Electric Energy 21 to 35 kWh / mt
LP stream 35 kg/ mt
Process water 0.2 m³ / mt
Cooling water none

Emissions

The incorporation of efficient wet scrubbing equipment makes it possible to guarantee the lowest urea dust emission figures from the granulation plant.
The urea dust is recovered as a 45% solution, and recycled.
All free ammonia in the urea solution will be released in the process and can, if required, be removed from the exhaust air efficiently with an acidic scrubbing system. The recovered ammonia in form of an ammonium salt should only be removed in case of producing technical grade urea

Urea dust 20 mg/ Nm³ air
Ammonia in off-gas 15 mg/Nm³air