Ammonia Form Operation of Condensate Polishing Plant for Long Periods in High pH Systems at Moneypoint Power Station

摘要

This paper details ammonium form operation experience of the condensate polishing system at Money-point Power Station,a 3 x 300 MW coal fired station operated by the Electricity Supply Board (ESB) of Ireland.Ammonium form operation is part of the normal operation of the condensate system since June 1988.Regeneration procedures using a conventional two vessel regeneration system have been developed using both two bed and three bed resin systems to achieve very low levels of cross contamination of resins necessary to allow ammonium form operation whilst still maintaining a very high level of polished condensate quality.Sodium levels of about 0.3 ug o kg~(-1) are being achieved without the aid of high efficiency separation/regeneration plant by the adoption of optimum resin particle sizes and densities and the use of a double resin movement technique.Bed run lengths of up to 200 days are being obtained at pHs as high as 9.6.