Thermal processes: MSF, MED.
Fouling of heat transfer surfaces in vapour compression systems, MSF's (Multiple Stage Flash Evaporators) or MED's (Multiple Effect Distillation) is a major problem in desalination. Scales reduces heat transfer efficiency and decreases water output. Dosing sulfuric acid in the feed water to reduce carbonate scale formation, combined with the inherent high temperatures of such systems, it leads to the formation of calcium sulphate thin deposit. SEQUION® phosphonates, new polymers HYDRODIS® -organophosphonates, being highly effective threshold scale inhibitors combined with excellent thermal stability, are the best choice to control calcium sulphate scale in MSF's, MED's desalination systems.