镀镍废水膜法浓缩回用工艺

Membrane Process for Concentrating and Reusing Nickel Plating Effluent

研究了采用膜分离技术一次性连续浓缩回用镀镍漂洗水的可行性。结果表明：使用BW反渗透膜可以获得79．5％的淡水，透盐率为2．75％；所产浓水再次加压后利用SW反渗透膜继续浓缩约8．3倍。整个系统能耗率为0．9—1．1kW·h／m^3，系统将镀镍漂洗水浓缩40倍后，镍的质量浓度达12～16g／L，透过液和浓水经处理后回用。

The feasibility of continuously concentrating and recycling nickle plating rinse water by membrane separation technique in one process has been demonstrated in experiments. The results show that by using BW RO membrane （BWRO）, the freshwater recovery rate and ion pass rate is 79.5% and 2.75% respectively. On this basis, the concentrated rinse water thus obtained was further concentrated about 8. 3 times by SW RO membrane. The energy consumption of the whole system is about 0,9 ～ 1.1 kW·h/m^3. The mass concentration of nickle ions can be up to 12 ～ 16 g/L when nickle plating rinse water is concentrated about 40 times, and the permeation and concentrated water can be reused after treatment.