Multiple Wet Scrubber units are designed to handle large quantity of dusty air from the prill tower. Each scrubber has two circulating/ spraying loops.
In one of them there is a circulation of urea solution (U) or urea/ammonium sulphate aqueous solution (UAS) or urea/ammonium nitrate aqueous solution (UAN) depending on the type of acid used to react with ammonia.
The second loop contains process water used to constant flushing of demisters and dilution of obtained product up to the required concentration.
To remove ammonia, in most cases, sulphuric or nitric acid is used depending on their availability as well as possibility of product distribution/utilization.
Advantages:
Emission Control with Product recovery
Trouble free operation.
Flexibility to install before or after ID Fan.
Inherent quality to reduce Low water or aqueous solution requirement.
Low pressure drop ( 60 mmwc ).
Capable to reduce .7μm particulate up to 90% with reduction in dust and ammonia up to approx. 25 mg/Nm3 .
