The research of new induced crystallization nuclear in water softening

Based on the determined metastable region by static beaker tests, this paper studied cation exchange resin in the treatment of recycling cooling water softening, compared to macroporous porous polymer materials resin white balls, cation exchange resins could be obtained as efficient induced crystallization of nuclear, and effluent achieved the circulating cooling water recharge water quality standard. The best experimental conditions for ion-exchange resin was: pH value for 9.24, the amount of Na₂CO₃ (concentration 0.05 mol/L)for 5.0 ml/L, the amount of resin for 40 g/L, mixing time for 20 min, and mixing intensity for 200 r/min. Ca²⁺ removal rate reached 94.8% and 94.8%, and effluent´s calcium concentration were 0.52 mmol/L. And average moisture content of crystalline product was 20.17%, the calcium ions in the carrier´s average crystallization of 27.58 mg/g.