消除阻垢剂对碳酸钙结垢影响试验研究
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摘要
为了提高高盐废水反渗透脱盐过程中的浓水回收率,降低反渗透成本,可以先去除浓缩液中高浓度成垢离子,再将处理后的浓缩液进行循环利用。通过电导率法研究了阻垢剂作用下碳酸钙结垢规律,并进一步研究了消除阻垢剂影响的方法。结果表明,10mg/L MDC220阻垢剂对碳酸钙沉淀具有明显的阻垢效果。通气条件下,在"阻垢剂-CaCl_2-Na_2CO_3"体系中投加双十二烷基二甲基溴化铵(DDAB)或者MgO,可以显著消除阻垢剂对碳酸钙的结垢影响,且相同投加量下DDAB对阻垢剂的消除作用优于MgO。试验条件下,最优阻垢剂消除药剂为20mg/L DDAB,最优通气时间为30min,最优空气流量为0.2m~3/h。
In order to increase the recovery rate of concentrated water and reduce the cost in the process of reverse osmosis desalting of high-salt wastewater, the high concentration scaling ions in the concentrated liquid could be removed first, and then the treated concentrated liquid could be recycled. In this paper the scaling regularity of calcium carbonate under the action of scale inhibitor was studied by conductivity method, and the approaches to eliminate the effect of scale inhibitor were further explored. Results showed that 10 mg/L MDC220 had obvious scale inhibition effect on calcium carbonate precipitation. In the scale inhibitor-CaCl_2-Na_2CO_3 system, adding DDAB or MgO under aeration condition could obviously eliminate the effect of scale inhibitor on calcium carbonate scale. The effect of DDAB on eliminating scale inhibitor was better than that of MgO under the same dosage. In this experiment, the optimum scale inhibitor eliminating agent was 20 mg/L DDAB, the optimal ventilation time was 30 min, and the optimum air flow rate was 0.2 m~3/h.
In order to increase the recovery rate of concentrated water and reduce the cost in the process of reverse osmosis desalting of high-salt wastewater, the high concentration scaling ions in the concentrated liquid could be removed first, and then the treated concentrated liquid could be recycled. In this paper the scaling regularity of calcium carbonate under the action of scale inhibitor was studied by conductivity method, and the approaches to eliminate the effect of scale inhibitor were further explored. Results showed that 10 mg/L MDC220 had obvious scale inhibition effect on calcium carbonate precipitation. In the scale inhibitor-CaCl_2-Na_2CO_3 system, adding DDAB or MgO under aeration condition could obviously eliminate the effect of scale inhibitor on calcium carbonate scale. The effect of DDAB on eliminating scale inhibitor was better than that of MgO under the same dosage. In this experiment, the optimum scale inhibitor eliminating agent was 20 mg/L DDAB, the optimal ventilation time was 30 min, and the optimum air flow rate was 0.2 m~3/h.
引文
[1] 陈明燕,蓝大蔚,刘宇程.高含盐废水脱盐处理技术研究进展[J].化工环保,2018,38(1):19-24.
[2] LI H,LIU W,QI X.Evaluation of a novel CaSO4 scale inhibitor for a reverse osmosis system[J].Desalination,2007,214(1-3):193-199.
[3] 宋跃飞,高学理,苏保卫,等.高回收率反渗透海水淡化工艺的应用研究进展[J].水处理技术,2013,39(3):6-12.
[4] 李辉,吴雅萍,李卫星,等.RO膜用于高浓度含盐废水处理的结垢控制[C]//全国膜分离技术在冶金工业中应用研讨会,2014.
[5] 马红鹏,齐永红,武思拓,等.煤化工废水零排放的工程运行及结垢离子脱除的分析研究[J].能源化工,2017,38(4):78-81.
[6] 吴雅琴,杨波,申屠勋玉,等.膜集成技术在高含盐废水资源化中的应用[J].水处理技术,2016(7):118-120.
[7] 郦和生,谢文州.反渗透膜阻垢剂评价方法的研究进展[J].工业水处理,2010,30(3):1-3.
[8] 张子潇.工业用再生水生产过程中的药剂使用与成本分析[J].给水排水,2016,42(5):26-31.
[9] XU J,RUAN G,ZOU L,et al.Effect of chlorine and acid injection on hollow fiber RO for SWRO[J].Desalination,2010,262(1-3):115-120.
[10] 王翠彦.高级氧化法提高反渗透浓缩液可生化降解性的研究[D].北京:中国石油大学,2010.
[11] 宋跃飞.集成膜法海水淡化过程中纳滤——反渗透膜面结垢趋势预测及防垢研究[D].青岛:中国海洋大学,2013.
[12] 陈家驰,李虎,罗漫,等.不同阻垢剂的阻垢性能及对CaCO3晶型影响的研究[J].水处理技术,2017(5):81-84.
[13] 朱水平,曹丽亚,殷甜甜,等.利用电导率法研究聚环氧琥珀酸的阻垢性能[J].上海大学学报(自然科学版),2016,22(2):211-217.
[14] 杨庆峰.Scaling salts removal in RO concentrates by inorganic induced method[J].化工学报,2005,56(10):1 912-1 914.
[15] YANG Q,LIU Y,DAVID H,et al.Scaling Salt Removal by Addition of Inorganic Particles[J].Journal of chemical engineering of japan,2008,41(1):6-12.
[2] LI H,LIU W,QI X.Evaluation of a novel CaSO4 scale inhibitor for a reverse osmosis system[J].Desalination,2007,214(1-3):193-199.
[3] 宋跃飞,高学理,苏保卫,等.高回收率反渗透海水淡化工艺的应用研究进展[J].水处理技术,2013,39(3):6-12.
[4] 李辉,吴雅萍,李卫星,等.RO膜用于高浓度含盐废水处理的结垢控制[C]//全国膜分离技术在冶金工业中应用研讨会,2014.
[5] 马红鹏,齐永红,武思拓,等.煤化工废水零排放的工程运行及结垢离子脱除的分析研究[J].能源化工,2017,38(4):78-81.
[6] 吴雅琴,杨波,申屠勋玉,等.膜集成技术在高含盐废水资源化中的应用[J].水处理技术,2016(7):118-120.
[7] 郦和生,谢文州.反渗透膜阻垢剂评价方法的研究进展[J].工业水处理,2010,30(3):1-3.
[8] 张子潇.工业用再生水生产过程中的药剂使用与成本分析[J].给水排水,2016,42(5):26-31.
[9] XU J,RUAN G,ZOU L,et al.Effect of chlorine and acid injection on hollow fiber RO for SWRO[J].Desalination,2010,262(1-3):115-120.
[10] 王翠彦.高级氧化法提高反渗透浓缩液可生化降解性的研究[D].北京:中国石油大学,2010.
[11] 宋跃飞.集成膜法海水淡化过程中纳滤——反渗透膜面结垢趋势预测及防垢研究[D].青岛:中国海洋大学,2013.
[12] 陈家驰,李虎,罗漫,等.不同阻垢剂的阻垢性能及对CaCO3晶型影响的研究[J].水处理技术,2017(5):81-84.
[13] 朱水平,曹丽亚,殷甜甜,等.利用电导率法研究聚环氧琥珀酸的阻垢性能[J].上海大学学报(自然科学版),2016,22(2):211-217.
[14] 杨庆峰.Scaling salts removal in RO concentrates by inorganic induced method[J].化工学报,2005,56(10):1 912-1 914.
[15] YANG Q,LIU Y,DAVID H,et al.Scaling Salt Removal by Addition of Inorganic Particles[J].Journal of chemical engineering of japan,2008,41(1):6-12.
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