In several sections of a urea plant, pipelines can become easily blocked when temperatures become too low and during a shutdown of the plant blocking can occur if the right measures are not taken.
Prilling buckets are the oldest technology to form solid urea in a urea plant. This article looks at the design criteria for prilling buckets and reports on experiences with various designs.
The urea melt pump is a challenging application of a centrifugal type of pump. Urea polymer lumps falling in the melt pump suction line can cause cavitation of the pump and even damage the pump shaft.
The nozzles used in urea fluid bed granulation form the most essential part of a fluid bed granulation plant. This discussion looks at the problem of nozzle choking, the causes and solutions.
A discussion on the injection of sulphuric acid in the urea melt as a solution to reducing ammonia emissions from the urea prilling tower.
A discussion on some of the different solutions being used in the urea industry to reduce ammonia and urea dust emissions.
In the high pressure synthesis section of a urea plant there are several high pressure pipelines prone to higher vibration. Special precautions are needed to reduce and control the vibrations in these lines and to ensure safe and reliable operation.
A discussion about the relationship between urea plant load and biuret content in the final product.
A discussion about the possible causes of foaming in the purification and concentration section of a urea plant.