冷轧厂冷轧废水回用及零排放技术

Waste Water Reuse and Zero Drainage for Steel Cold Rolling Mill

文章介绍了几种冷轧废水的回用及零排放技术,并结合当今流行的零排放涵义分析冷轧废水的零排放前景。目前国内广泛使用的工业废水处理技术主要包括UF、RO(反渗透膜双膜法)和EDR技术,它们的主要材料是纳米级的反渗透膜,而这种技术的作用对象是离子(重金属离子)和分子量在几百以上的有机物。其工作原理是在一定压力条件下,H_2O可以通过RO渗透膜,而溶解在水中的无机物,重金属离子,大分子有机物,胶体,细菌和病毒则无法通过RO渗透膜,从而可以将渗透的纯水与含有高浓度有害物质的废水分离开来。

The paper introduces waste water reuse and zero drainage for cold rolling mill, and analyses the prospective about zero drainage. At present, the current used waste water drainage technique consists of UF, RO and EDR. Their operation principle is that the H2O can freely flow through the osmotic film under certain pressure, but other dissolved mater cannot pass through, so as to realize the zero drainage of waste water.