The wet Air / Gas stream is split at the air dryer inlet through a differential distributor valve. Part of this air / gas stream is passed through an external heater and heated to a regeneration temperature of 160-180°C, then it is fed to the Adsorber desiccant tower A containing Silica gel or activated Alumina / Molecular Sieves under regeneration thus removing out the moisture from the desiccant bed.
A water cooled / air cooled aftercooler condenses the desorbed moisture which is discharged regularly through the automatic drain trap . after condensation This Air/ Gas stream joins the main incoming air stream and goes for drying to the other tower B under drying.
Normally a Cycle time of 8+8 hrs is utilized to complete one cycle of operation. After each operation the changeover is effected automatically.
This type of dryer provides an outlet Dew Point of -40 deg C. The Air dryer can be supplied with standard accessarie like simplex / duplex Prefilters / Afterfilters, Flowmeters, dew point meters etc. The system is fully automatic / semi automatic , with Timer / PLC controls with feedbeck to/ from main DCS.
APPLICATIONS —
– Instrument air dryers for power plants Refineries & Petrochemicals , chemical & fertilizer plantsetc.
– CNG Compressed Natural Gas Drying & conditioning plants , Gas Drayers.
– Hydrogen Gas Drier for generator Cooling Application.