残余阻垢剂对高盐废水软化效果影响的研究  

Study on the Effect of Residual Scale Inhibitor on Softening Effect of High-Salt Wastewater

作　　者：刘晓平[1,2,3,4] 李占斌 李佳佳[3,4] 程圣东 苗滋耀[3,4] 李鹏 LIU Xiaoping;LI Zhanbin;LI Jiajia;CHENG Shengdong;MIAO Ziyao;LI Peng(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi′an University of Technology,Xi′an 710048,China;Key Laboratory of on Ecological Hydrology and Disaster Prevention in Arid Regions,National Forestry Administration,Xi′an University of Technology,Xi′an 710048,China;Yulin Coal Chemical Waste Resource Utilization and Low Carbon Environmental Protection Engineering Technology Research Center,Yulin 719000,China;Yulin High Tech Zone Yuheng First Industrial Sewage Treatment Co.,Ltd,Zero Discharge of Coal Chemical Wastewater and Solid Waste Resource Utilization"Scientists+Engineers"Team,Yulin 719000,China)

机构地区：[1]西安理工大学旱区生态水文与灾害防治国家林业局重点实验室,陕西西安710048 [2]西安理工大学省部共建西北旱区生态水利工程国家重点实验室,陕西西安710048 [3]榆林市煤化工废弃物资源利用与低碳环保工程技术研究中心,陕西榆林719000 [4]榆林高新区榆横第一工业污水处理有限公司,榆林煤化工废水零排放与固废资源化利用“科学家+工程师”队伍,陕西榆林719000

出　　处：《水处理技术》2023年第1期118-122,共5页Technology of Water Treatment

基　　金：国家自然科学基金(52179043,51779204);陕西省创新人才团队(2018TD-037);榆林高新区科技计划项目(ZD-2021-08);榆林高新区“科学家+工程师”人才团队(YGXKG-2022-107);榆林市科技计划项目(YF-2022-197)。

摘　　要：做好膜浓缩后高浓盐水的硬度软化是保障蒸发结晶系统稳定运行的关键。工程实践和实验结果表明,膜浓缩后残余阻垢剂的持续阻垢作用严重制约了化学法硬度软化的效果。其中,在相同阻垢剂投加量下,含磷阻垢剂对浓水软化的抑制作用高于无磷阻垢剂,进一步实验表明,有机类药剂(壬基酚聚氧乙烯醚)和无机药剂(石灰)两类不同化合物在消减膜浓水中残余阻垢剂的持续抑制软化作用明显,投加后高浓盐水的硬度去除率分别可提高7.04%和10.66%,硬度去除率最高可达到96.51%。在实际应用中石灰作为双碱法的辅助药剂的投加成本为0.04元/t,可进一步提高高密池硬度去除率约6.83%,保障了后续微滤膜分离系统的稳定运行,生产和经济效益明显。Softening the hardness of highly concentrated brine after film concentration is the key to ensuring the stable operation of the evaporation and crystallization system.Engineering practice and experimental results showed that the continuous scale inhibition of residual scale inhibitors after membrane concentration severely limits the effectiveness of chemical hardness softening.The inhibiting effect of phosphorus scale inhibitors on concentrated water softening is higher than that of phosphorus-free scale inhibitors under the same scale inhibitor dosage.The further experiment results showed that the organic reagents A and inorganic reagent B as two kinds of different compounds had an effect of suppression in water softening under the cutting membrane residual scale inhibitor concentration.The hardness of highly concentrated brine after the dosing removal rate can be increased by 7.04%and 10.66%,respectively.The maximum hardness removal rate can reach 96.51%.In practical application,the cost of adding agent B is 0.04 yuan/t,which ensures the stable operation of the subsequent membrane system and evaporation crystallization system,and it has obvious production and economic benefits.

关 键 词：阻垢剂 高浓盐水 硬度 残余 抑制 消减 

分 类 号：TQ085[化学工程]