无机高盐废水电渗析规律的研究

摘要

考察了自制一级一段式电渗析装置在焦化厂的高盐、高硬度废水中的脱盐效果和规律。为了防止结垢对膜组件的影响，首先对高盐、高硬度废水进行了软化处理，随后确定了该软化废水的分解电压，最后详细考察了运行时间、电压、中间室废水流量及阴、阳极室废水流量对电渗析脱盐效率的影响规律。结果表明，电渗析脱盐效率随运行时间的延长而逐步下降，随着电压的升高而增大，随中间室流量的减小而增加，随阴、阳极室流量的增大而升高。当操作电压为2.8 V，中间室流量为78 mL·h^-1，阴、阳极室流量为42 mL·h^-1，连续运行30和60 min时的平均脱盐效率分别为6.7%和6.4%。

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	辛世纪
	刘勇
	曹文彬
	尹胜奎
	尹秋响
	郝红勋

关键词：膜废水脱盐

Abstract：

In this work, the desalting efficiency and rules of high-salinity, high-hardness wastewater from coking plant by home-made electrodialysis device was investigated. Firstly, the high-salinity, high-hardness wastewater was softened to prevent membrane module from fouling. Secondly, the breakdown voltage of the softened wastewater was determined. Finally, the influences of running time, voltage, flow rate of wastewater in the dilute compartment and the cathode and anode compartments on desalting efficiency were studied in detail. The results showed that desalting efficiency was decreased with time, improved with the increase of voltage, enhanced with the decrease of the flow rate of wastewater in the dilute compartment and with the increase of the flow rate of sewage in the cathode and anode compartments. When the voltage was set at 2.8 V, flow rate of wastewater in the middle chamber and the cathode and anode compartments were set at 78 mL·h^-1 and 42 mL·h^-1 respectively, the desalting efficiency were 6.7% for 30 min running time and 6.4% for 60 min running time, respectively.

Keywords： membranes； waste water； desalination

Received 2015-07-15;

Fund:

国家自然科学基金项目（51478308）。

Corresponding Authors: 刘勇,E-mail:lytju@tju.edu.cn。 Email: lytju@tju.edu.cn

About author: 辛世纪(1990-),女,硕士研究生,研究方向为水处理。

引用本文:

辛世纪, 刘勇, 曹文彬, 尹胜奎, 尹秋响, 郝红勋.无机高盐废水电渗析规律的研究[J]. 化学工业与工程, 2017,34(6): 38-42

Xin Shiji, Liu Yong, Cao Wenbin, Yin Shengkui, Yin Qiuxiang, Hao Hongxun.Study on the Electrodialysis Rules of Inorganic High-Salinity Wastewater[J]. Chemcial Industry and Engineering, 2017,34(6): 38-42

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