The Effects of Fouled Anion Resin on Condensate Polishing Plant Performance at Dungeness B Power Station

摘要

The return to power,after an outage,at Dungeness B Power Station was delayed because of problems in achieving an in-specification feedwater acid conductivity.Dungeness B has a full flow cation/mixed bed condensate polishing plant(CPP).Investigations showed that the acid conductivity was produced by carbon dioxide and organic impurities both by-passing the CPP and slipping through it.Resin analysis showed that the anion resin had severely impaired sulfate removal kinetics.The paper covers the work done to try and identify the nature and source of the organics and their effect on the anion resin.One significant finding was that the carbonate removal kinetics were as impaired as those for sulfate removal;this had not been previously experienced in the CPP at any British Energy plant.