Problem No. 10: High CO₂ content in liquid outlet of a high pressure CO₂ stripper in urea synthesis
Possible causes and solutions to the problem of high CO2 content in the liquid outlet of a high pressure SO2 stripper in a urea plant are discussed.
Tag: Urea
Problem No. 9: Unblocking pipelines after a urea plant shutdown
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.
Problem No. 8: Urea prilling buckets
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.
Problem No. 7: Urea melt pump damage
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.
Problem No. 6: Choking of urea fluid bed granulator nozzles
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.
Problem No. 5: H₂SO₄ injection in urea melt
A discussion on the injection of sulphuric acid in the urea melt as a solution to reducing ammonia emissions from the urea prilling tower.
Problem No. 4: Gaseous ammonia and dust emissions in urea plants
A discussion on some of the different solutions being used in the urea industry to reduce ammonia and urea dust emissions.
Problem No. 3: Higher vibration in high pressure pipelines
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.
Problem No. 2: High biuret level at low plant loads
A discussion about the relationship between urea plant load and biuret content in the final product.
Problem No. 1: Foaming in purification and concentration section
A discussion about the possible causes of foaming in the purification and concentration section of a urea plant.