电渗析法处理污染三甘醇工艺优化研究

Optimization for Treatment of Contaminated Triethylene Glycol by Electrodialysis Process

摘要:

摘要：以长庆靖边气田被污染的三甘醇溶液为实验对象，采用四室电渗析反应器对其进行净化处理，研究了操作电压、运行时间、淡室进液流量、进液总溶解性固体（TDS）浓度等因素对处理后溶液品质的影响。在单因素实验的基础上采用响应面分析法对电渗析工艺进行了优化。优化的工艺条件为：操作电压48.92 V，运行时间128.09 min，淡室进液流量12.00 L/h，当被污染的三甘醇溶液TDS质量浓度为1968 mg/L时，在此工艺条件下处理后TDS浓度可降至（38.3±1.2）mg/L。实验中对电渗析过程的极限电流进行了测定，在淡室进液流量为12.00 L/h时，测得极限电流为0.189 A，对应的极限电压为66 V，说明装置在优化条件下运行不会出现浓差极化等不正常现象。

Abstract:

Abstract: A four chamber electrodialysis was used for purifying the contaminated triethylene glycol solution of Changqing Jingbian Gasfield. The run characteristics such as voltage, running time, flow rate in dilute compartment and inflow concentration of TDS were studied. The optimized process conditions were obtained by using response surface methodology on the based of single-factor tests. Under the optimized conditions of voltage of 48.92 V, running time of 128.09 min, flow rate in dilute compartment of 12.00 L/h, the TDS concentration after treatment could reduce from 1968 mg/L to (38.3±1.2)mg/L. Meanwhile, limited current of electrodialysis processing was determined. When flow rate in dilute compartment reached to 12.00 L/h, the limited current was 0.189 A, and the corresponding limited voltage was nearly 66 V. It was proved that some abnormal phenomena such as concentration polarization were not appeared during the triethylene glycol desalination process.