火电厂石灰石-石膏湿法脱硫废水分离处理

发布时间：2018-02-10 13:18

本文关键词： 脱硫废水纳滤膜分离浓缩废水处理盐平衡水平衡资源化利用　出处：《热力发电》2016年09期 　论文类型：期刊论文

【摘要】：脱硫废水由于具有水量不稳定、水质复杂、含盐量高等特点,成为电厂废水处理的难题。现行脱硫废水处理技术普遍存在高投资、高能耗和高药耗问题,难以实现脱硫废水减量化和资源化回收。对此,本文通过分析脱硫废水水质,提出了一种无需加药预处理的新型脱硫废水处理技术,即采用纳滤膜分离浓缩工艺将脱硫废水中的盐分进行分离回收,实现脱硫废水的资源化利用。在华能玉环电厂的中试试验验证结果表明:采用纳滤膜进行脱硫废水盐分的分离浓缩,可有效分离废水中一价离子和二价离子,分离后形成的NaCl溶液可进一步处理生成次氯酸钠等化学药剂在电厂生产过程中使用;该工艺路线在电厂盐平衡的基础上实现了脱硫系统的水平衡,打破了传统废水处理工艺误区,真正实现了脱硫废水的资源化回收。
[Abstract]:Desulfurization wastewater has the characteristics of unstable water quantity, complex water quality, high salt content and so on, which has become a difficult problem in power plant wastewater treatment. The current desulfurization wastewater treatment technology generally has the problems of high investment, high energy consumption and high drug consumption. It is difficult to realize the reduction of desulphurization wastewater and the recovery of desulfurization wastewater. In this paper, through analyzing the water quality of desulfurization wastewater, a new treatment technology of desulfurization wastewater without pretreatment is put forward. That is, using nanofiltration membrane separation and concentration process to separate and recover the salt from desulfurization wastewater. The results of pilot test at Huaneng Yuhuan Power Plant show that the separation and concentration of salt in desulfurization wastewater by nanofiltration membrane can effectively separate monovalent ions and bivalent ions from the wastewater. The NaCl solution formed after separation can be further treated to produce sodium hypochlorite and used in the process of power plant production, and the water balance of the desulfurization system is realized on the basis of the salt balance in the power plant. It breaks the misunderstanding of traditional wastewater treatment technology and realizes the recycling of desulphurization wastewater.
【作者单位】：华能国际电力股份有限公司玉环电厂;华能国际电力股份有限公司;西安热工研究院有限公司;
【分类号】：X773

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