Water content in urea products
Thread Content
The high moisture content in the air during summer has increased the vacuum level in the evaporation system, and the air vents in the granulation tower have also been kept tightly closed. Why is the moisture content in urea still high? How can this problem be solved?
This post was last edited by htcfkq on 2010-8-16 at 17:41. The high air humidity in summer causes moisture in the air to transfer into the molten urea during the granulation process; as a result, the moisture content in the urea particles often exceeds normal levels. There are no effective technical solutions; if the particle temperature permits, it is possible to reduce the air flow rate in the granulation tower slightly in order to decrease moisture absorption. Another approach is to increase the vacuum level during the second stage of evaporation as much as possible; the evaporation temperature can be raised appropriately, but care must be taken to ensure that the content of biuret does not exceed the allowable limits.