PSA (Pressure Swing Adsorption) Based Nitrogen Plant is to produce Nitrogen gas form Atmospheric compressed air. Air passes through Carbon Molecular Sieves (CMS) at a certain pressure, the moisture, Oxygen and CO2 are selectively adsorbed, and balance nitrogen comes out and collects in the receiver.
Compressed air first collects in air receiver at 7.0 kg/cm2 pressure and then goes to PSA module through air filter module. The air receiver has been providing to avoid air pressure fluctuation so that a constant flow & pressure will available during plant operation. One high efficient air filter has been provided at the outlet of air receiver to arrest dust particles from nitrogen gas before enter in PSA module.
This is a specially designed composite bed type PSA module having two towers filled with special grade of Activated Alumina and second generation of high efficient Carbon Molecular Sieves (CMS) to produce 99.5% pure Nitrogen. As compressed air passed through PSA module, moisture from compressed air is adsorbed in Alumina Bed and oxygen & carbon dioxide are selectively adsorbed in CMS bed, balance Nitrogen collected in surge vessel at the outlet of PSA Module.
Surge Vessel is a vertical, cylindrical type vertical pressure vessel. Surge vessel has been provided to collect outlet nitrogen before send to storage tank / user point.
One Oxygen analyzer connected with this vessel to measure oxygen impurity in the product nitrogen. Nitrogen from surge vessel now goes to user point through flow meter and backpressure control valve at required flow and pressure. To avoid impure high oxygen content in nitrogen on 3-way vent valve has been provided with an interlock of oxygen analyzer. In case oxygen content high as purity limit nitrogen will vent out in the atmosphere till purity comes with in desired limit.
QUALIFICATION
- Design Qualification
- Installation Qualification
- Operational Qualification
- Performance Qualification Protocol
- Performance Qualification Report
STANDARD OPERATING PROCEDURE
