| This paper has investigated the method on groundwater of high concentration of hardness, salt content and sulfate in certain power plants. And the feasible method of removal of calcium and sulfate concent is reseaerched through experiment, indicating the applicability and localization of methods of lime and calcium chloride. The paper also suggest that calcium sulfate crystal is separated out when the iron product is above 10Kspby discussing the mechanism of calcium sulfate and deposit formation and also disussing the effect of salt concent for deposit formation. The general method of removal of sulfate is not very effective. So a method(intenerate by calcareousness and sodium carbonate-nanofiltrati) is developed through synthetical analysis and economical compare of technique. The technologic flow is designed by technogic calculate as well. The method may bring considerable economic and environment benefit.
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