Revamping scheme for large capacity increase of CO2 Stripping plants
- Proven design
- Suitable for production up to 6000 t/d in combination with Split Flow™ & Full Condenser™ technologies
The Medium-Pressure Split Flow is a powerful tool to debottleneck existing CO2 Stripping plants when large production increases are required, such as 50% or more above the nameplate capacity.
In such cases the existing HP Stripper is usually the bottleneck due to flooding issues. To overcome this hydraulic limitation, Casale proposes to install a new MP plant section in parallel with the existing HP stripper, working at 18 bar, where the urea reactor outflow exceeding the allowable load of the stripper is sent. The MP section is equipped with a decomposer and a condenser. The unreacted carbamate is partially decomposed and the developed vapours are condensed with the aid of carbonate solution from the downstream LP section. The resulting carbamate solution is recycled to the HP scrubber, while the urea solution is sent to the LP decomposer along with the solution from the HP stripper.
With the implementation of Split Flow™ & Full Condenser™ equipped with MP Split Technology it is possible to produce about 6'000 MTD in a single train plant.