method and device for adjusting the karbonathaerte and the salinity of waessern

摘要

The carbonate hardness of water can be adjusted by passing the raw water over acid cation exchangers and a side stream over basic anion exchangers to absorb the free acid. Free CO2 is removed completely in a scrubber by a blast of air. Lime water of a certain constant concentration is mixed with a CO2-contg. side stream. The resulting carbonate soln. is added to the water leaving the scrubber, in the desired amount.