SCOTTISH WATER LOSES ITS 'RAG'

摘要

At a time when water companies are under increasing pressure to improve services, against a background of increasing operating costs and rising energy bills, extreme weather events and rising ecological expectations, optimisation of asset performance has become critical. One costly and disruptive problem - 'ragging' - has been identified as a particular area in need of such a review. A frequently occurring problem, with almost all types of impellers, is that fibres and other particles tend to build up on the impeller vanes. Generally, this build-up of rags (ragging) causes a decrease in the pump's hydraulic efficiency, increasing power consumption. Ragging can cause a total pump blockage if no interim remedial action is taken.