NORAM Engineering & Constructors Ltd (Vancouver) and ECO-TEC Inc. provided the first industrial installation of a chloride removal system, which selectively removes chlorides from the black liquor cycle of a pulp mill.
High chloride concentrations cause recovery boiler plugging and corrosion, reduce steam generation, drive up energy costs, and result in expensive shutdowns. The novel system employs a special amphoteric sorption resin in a modified ion exchange column, capable of removing both anions and cations simultaneously from solution. Chloride removal rates exceeding 90%, and CO3 and SO4 make-up losses of less than 4% have been achieved at the mill.
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