摘要
在循环冷却排污水回用系统中,采用连续微滤(CMF)作为反渗透的预处理,经现场中试试验检验连续微滤的可行性,并取得其运行的参数和条件及变化规律。连续微滤产水稳定,水质符合反渗透系统的进水水质指标。建议使用该工艺时应根据循环水水质筛选理想混凝剂,采用石灰-纯碱工艺去除循环水中Ca2+、Mg2+、Ba2+、Sr2+、活性硅等易在反渗透膜上结垢成分,有助于提高反渗透的回收率。
The continuous microfiltration (CMF) is applied as a pretreatment process of the reverse osmosis which serves as predesalination in the recirculating cooling water effluent reuse system. The feasibility study of CMF was conducted in the pilot-scale experiment on the spot, with the parameters, conditions and variation law of operation obtained. The result showed that the water output of CMF was stable and the quality of water met the standard of inlet water of reverse osmosis system. It is suggested that according to the water quality in different thermal power plant. contrast experiment should be conducted to choose the desirable coagulant before CMF is put into operation. Lime and sodium carbonate are suggested to be used to remove the contamination, such as Ca2+?Mg2+?Ba2+?Sr2+ and active silicon,easily leading to scaling on the reverse osmosis membrane which can help boost the water recovery.
