BLOWDOWN BOILERS CONDENSATE CORROSION DEIONIZE COPPER

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Abstract

Many power plants with designs of condensate polishers that date to the 1960s and early 1970s were originally provided with a pre-filtration stage. In many cases these pre-filters are no longer used because of the effort required to keep them working (1). Thus, the use of the pre-filters ahead of these early polishing plants at fossil units has largely ceased. Advances in the filtration technology in recent years have made the deployment of filtration in condensate systems very effective both in terms of performance and cost. The use of disposable filter cartridges to control the transport of solids, especially during the start-up phase when the suspended solids content is at its highest, has proven to be a very effective upgrade with a quick payback for power plants. These filtration systems using cartridges engineered for optimum solids holding capacity, high flowrate, low-pressure loss, and compact size are highly efficient and cost effective. This article discusses several case studies on the use of the disposable filter cartridges, made using a pleat design that gives the filter cartridge a high flow capacity and contamination-holding capacity, while providing 99.98% particulate removal efficiency at the rated micron size.

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