Experiences with large scale revamping

This presentation is about a revamp on a large scale in which the capacity of a traditional conventional total recycle plant comprising two identical units is raised by about 60 % by converting these units into a single line CO2 stripping plant. 

The revamped urea melt plant is a spider in a web in the Azomures site. Urea solution is used as a feedstock for the existing UAN production facility, to serve the a newly installed granulation plant and urea solution is used as a feedstock for the existing melamine production facility. In addition the urea melt plant is able to process the returned carbamate vapor from the existing melamine facility. Since all operational conditions needed to be accomplished in the design, the revamp project was one of the greatest challenges in the Stamicarbon revamping history.