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WATER CHEMISTRY ASPECTS FOR SUPERCRITICAL UNIT V Chandrasekharan Sr. Manager NTPC SIPAT Slide 2 DETAILS WATER TREATMENT OT INTRODUCTION BOILER ACID CLEANING BOILER WATER PARAMETERS LP & OXYGEN DOSING SYSTEM ON LINE MONITORING CHANGE OVER FROM ALKALINE TREATMENT TO OT Slide 3 WATER TREATMENT - EXTERNAL Depending on the source of water 1. Clarification 2. Filtration 3. Demineralization 4. DM With RO Make up water quality at DM Outlet Conductivity of > 0. 1 s/cm Silica -