Among the three urea production methods—full aqueous solution circulation, CO2 stripping, and ammonia stripping—which is more suitable for production in the northern regions?
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Among the three urea production methods—full aqueous solution circulation, CO2 stripping, and ammonia stripping—which is more suitable for production in the northern regions?
The situation is a bit different, right? In the old factories in the north, aqueous solutions are used for the most part, while in the new factories, CO2 stripping is more common
For older units, full circulation of the aqueous solution is more common, while newer units mostly use CO2 stripping and ammonia stripping
In my opinion, the ammonia condenser used in ammonia stripping and the low-pressure ammonium methanate condenser require a relatively low temperature of the circulating cooling water, so they should perform better in northern regions.
The circulating cooling water temperature in the aqueous solution full-circulation ammonia condenser is relatively low, so it should perform better in the north. The process is lengthy, and higher insulation requirements are needed for the pipelines ；
The systems used in the 1970s and 1980s were mostly based on the aqueous solution full-circulation method, while those used nowadays are primarily based on the carbon dioxide stripping method.
Now it’s all done by air lift; the aqueous solution poses limitations, so it’s not cost-effective