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Savings in investment costs due to the reduction in size and – for the pool reactor concept – also the number of high pressure items
more stable level / pressure control
less sensitivity to changes in the load or the N/C ratio
fast capacity change of the plant due to self-regulating heat transfer characteristics
Reduced construction height, resulting in reduced construction costs
Improved heat transfer leading to reduced heat exchanger area
The high pressure section of recently-built urea plants are made of Safurex, a duplex steel specially developed for the Stamicarbon urea process by Sandvik, Sweden. This steel offers excellent corrosion resistance and high toughness and permits a reduction in the amount of added passivation air.
For plants with state-of-the-art capacities Uhde applies Flowserve centrifugal pumps in ammonia and carbamate high pressure service. These pumps were newly introduced for this application and lived up to expectations in the Qafco 4 fertilizer plant. They proved to be highly reliable and require minimum maintenance.
Low energy consumption
High process efficiency leading to low raw material consumption figures
High on-stream times (reliability)
Low corrosion rates
High safety standards