摘要
以热法海水淡化浓盐水及原海水作为原料水,采用中空纤维反渗透膜进行了将近2个月的实验研究。实验结果表明,砂过滤器过滤速度及反冲洗、絮凝剂投加量对砂过滤器出水SDI值有较大影响。砂过滤器对浊度具有较好去除效果,但不能有效去除影响RO膜性能的热法海水淡化消泡剂(聚丙二醇)等物质。在整个实验期间,RO膜产水电导率为100~250μS/cm,RO膜脱盐率>99.55%;浓盐水实验阶段RO膜进水压力明显高于混合水实验阶段,分别为5.8~6.1 MPa、5.0~5.3MPa。并对热膜耦合海水淡化实际工程实施中应注意的问题提出建议。
A pilot-scale experiment of hollow fiber reverse osmosis membrane had beencarried out for nearly 2 months, using MED brine and raw seawater as raw water. The re原sults showed that the filtration line speed, backwashing of the sand filter and the dosage offlocculant had great effect on the effluent SDI value of the sand filter. Sand filter had agood removal effect on turbidity, but could not effectively remove the defoaming agents （polypropylene glycol） and other substances affecting the performance of RO film. RO permeateconductivity in the experiment was between 100-250 μS/cm and desalination rate was morethan 99.55%; the inlet pressure of RO membrane was 5.8-6.1 MPa at the brine experimentalstage, apparently higher than 5-5.3MPa at the mixed water experimental stage. Suggestionswere provided on attention points in application of thermal-membrane coupling seawater desalination.
出处
《冶金动力》
2018年第1期52-56,共5页
Metallurgical Power
基金
国家科技支撑计划课题(2015BAB10B01)
关键词
热膜耦合
海水淡化
实验研究
脱盐率
thermal-membrane coupling
seawater desalination
experimental study
desalination rate
