Stamicarbon is experienced in the design and engineering of high pressure equipment and piping systems for urea plants. Equipment
The quality of prills is strongly influenced by the bucket
design. Stamicarbon developed a prilling bucket design
suitable for larger plant capacities. This new design
incorporated internals to avoid slipping between the melt and
the bucket wall. These internals will restore the vortex
again, which is a result of gravity and rotation forces.
Ideally the liquid height (pressure drop) above every hole is
similar assuring a very sharp size distribution.
Another advantage of this design is a more laminar flow through the prilling bucket holes leading to less dust formation. Less dust will also be the result of a lower melt temperature (less breakage of prills at the bottom of the prilling tower).
Many previous debottlenecking projects prove the potential benefits of this new design. Stamicarbon's prilling bucket provides a granulometry of 97.5 wt% between 1 and 2.4 mm.
Mechanical strength is especially important when the product
needs to be stored after being subjected to a variety of
handling operations. Poor mechanical strength leads to
disintegration and dust formation and increased caking
Improvement of the impact strength is important if the prills are handled several times. Stamicarbon developed a unique technology to improve the impact strength of the prills.
Key in the Stamicarbon granulation technology is the spraying
nozzle principles, which leads to specific process
characteristics and several advantages.
Granulation by means of low pressure film spraying results in much less dust generation in the granulator.
Summarizing the advantages of low-pressure film spraying are:
Stamicarbon and Sandvik Process Systems developed a new
finishing technology for urea: the so called Pastillation
Process. The design and supply of urea Pastillation Systems
is a growth area with the Rotoformâ process proving an ideal
solution for the solidification of molten urea.
Specific advantages are:
Very low NH3 and dust emissions;
The Avancore® urea synthesis brings together innovations. read more »
The Urea 2000plus™ pool reactor read more »
The Urea 2000plus™ pool condenser read more »
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