摘要
有色冶炼企业采用膜分离技术实现废水“零排放”的同时产生一部分含盐量高、成分复杂的膜浓水,难以直接回用于生产和综合利用。采用蒸发结晶和电渗析资源化等方法处理时,由于钙离子浓度高,影响设备稳定运行。因此采用化学沉淀法和离子交换法进行了高盐膜浓水的深度除钙研究,结果表明,采用碳酸钠法除钙的效果有限,最低可处理至15 mg/L左右。采用树脂法离子交换法除钙效果较好,可降至1 mg/L以下,KY003特种除钙树脂对钙离子的离子交换量明显优于D001大孔型树脂,KY003特种除钙树脂对钙离子最大离子交换容量为135 mmol/L。树脂吸附除钙后可通过酸碱进行再生,采用“淋洗+浸泡”再生法再生效果较好,KY003特种除钙树脂再生率为92.5%。
Non-ferrous smelting enterprises adopt membrane separation technology to achieve"zero discharge"while producing a part of membrane water with high salt content and complex composition,which is difficult to be directly reused for production and comprehensive utilization.The stable operation of the equipment is affected by the high concentration of calcium ion in the process of evaporation crystallization and electrodialysis.In this paper,chemical precipitation method and ion exchange method were used to study the depth of calcium removal from concentrated water of high salt membrane.The study found that the effect of sodium carbonate method for calcium removal is limited,and the minimum treatment can be about 15 mg/L.The ion exchange capacity of KY003 special calcium removing resin for calcium ion is significantly better than that of D001 large hole resin.The maximum ion exchange capacity of KY003 special calcium removing resin for calcium ion is 135 mmol/L.The resin can be regenerated by acid and alkali after adsorption of calcium.The regeneration effect of"leaching+soaking"is better,and the regeneration rate of KY003 special calcium resin is 92.5%.
作者
陈国强
田森林
杨晓松
邵立南
于晨
CHEN Guoqiang;TIAN Senlin;YANG Xiaosong;SHAO Linan;YU Chen(BGRIMM Technology Group,Beijing 100160,China;Kunming University of Science and Technology,Kunming 650093,China;China University of Petroleum(East China),Qingdao 266580,China)
出处
《有色金属工程》
CAS
北大核心
2022年第8期198-202,共5页
Nonferrous Metals Engineering
基金
矿冶科技集团科研基金项目(02-2113)。
关键词
高盐膜浓水
深度除钙
化学沉淀法
离子交换除钙
再生
high salt film thick water
depth calcium removal
chemical precipitation
ion exchange calcium removal
regeneration
