絮凝剂溶液制备与投加系统的改进设计

摘要

There appears agglomeration and bad flocculation effect in flocculants solution made up by flocculants preparation and dosage unit, when the water pressure increased from 0.6Mpa to 0.8Mpa. Based on study of the flocculants property, a computational fluid dynamics model has been applied to the water-gas mixing in pre-dissolving device. According to the result of numerical simulation, water may flow backward if the water seam is smaller, as the water pressure does not change. And flocculants do not dissolve sufficient if the water seam is bigger, as the water pressure does not change. The higher or lower water pressure also has effect on pre-dissolving if the water seam does not change. Based on the result of numerical simulation, an optimization designing about pre-dissolving device has been done. The new pre-dissolving device for flocculant has been applied in Second Flocculants Preparation and Dosage Unit in Jiangxi Dexing Copper ore.%针对絮凝剂溶液制备与投加系统在供水压力由0.6MPa变为0.8MPa时，制得的絮凝剂溶液出现结团、絮凝效果差等现象，研发人员利用数值模拟技术对预溶器中的水、气混合过程进行数值模拟研究。对模拟结果分析后得出，当预溶器入水压力一定时，水缝开度过小会产生倒灌现象，开度过大会产生预溶不充分；当水缝一定时，压力过大或过小同样会影响絮凝剂粉料预溶效果。根据研究结果对现有预溶器进行优化设计，并将新版预溶器用于江西德兴铜矿水处理站二期絮凝剂溶液制备与投加设备。