高含盐水进行反渗透除盐的中试研究

Pilot Research on Reverse Osmosis Desalination of Salt-rich Water

目前膜法水处理技术已越来越多的应用于钢铁工业废水回用中,但一级反渗透产生的浓盐水却没有很好的处理办法,厂区内进行内耗仍然是主流趋势。随着钢铁行业节能减排的要求越来越严格及部分钢铁企业逐步向废水"零排放"目标迈进,积极寻求浓盐水的处理途径明显越来越迫切。文中对一级反渗透的浓盐水继续采用膜法进行脱盐的可行性进行论证,通过中试装置对浓水反渗透除盐进行研究,以判断反渗透的污染因素,确定反渗透的系统运行参数,并对中试过程中出现的问题进行分析,提出解决措施,为即将进行的设计提供依据。

Currently membrane water treatment technology has been increasingly used in the wastewater recovery of steel industry, but high-salt water produced by reverse osmosis did not have a good treatment method and internal consumption was still the mainstream. With ever stricter requirement on energy conservation and emission reduction of the steel industry and some steelmaking enterprises gradually moving toward the goal of ＂zero discharge＂, it was more and more urgent to actively search for methods for high salty water treatment. In this paper, the feasibility of high-salt water from primary reverse osmosis to be desalinated still by membrane method is discussed. Concentrated water being desalinated by reverse osmosis was investigated through a pilot plant, to judge the pollution factor and determine the operating parameters of reverse osmosis. Problems arising during the pilot process were analyzed and solutions were put forward, to provide a basis for the upcoming design work.