摘要
在船舶供水方面,一级反渗透海水淡化装置能将溶解性总固体(Total Dissolved Solids, TDS) 35,000 mg/L左右的海水转化为TDS在200~700 mg/L的淡化水,但长时间运行后其产水TDS会超过舰船淡化水水质要求。并且一级反渗透海水淡化装置对脱硼的效果不佳,仅采用一级反渗透海水淡化装置供水存在一定的健康风险,因此需要对一级产水进行二级反渗透深度处理。试验研究了操作压力和浓水回流对二级反渗透产水流量和产水TDS的影响,以及一级反渗透、二级反渗透的脱硼效果。结果表明:当操作压力在0.89~1.05 MPa时,二级反渗透的产水TDS在6~10.5 mg/L之间,满足舰船饮用水要求。浓水回流量对产水流量和TDS影响很小。当进水温度在15℃~25℃时,一级反渗透出水的硼含量为0.6~0.9 mg/L,达不到《生活饮用水卫生标准》(GB 5749-2006)规定的0.5 mg/L的限值;二级反渗透出水的硼含量在0.2~0.4 mg/L,满足饮用要求。
In the aspect of ship water supply, the primary reverse osmosis device can convert the seawater with total dissolved solids (TDS) of about 35,000 mg/L to the desalinated water with TDS of 200 - 700 mg/L. After a long-term operation, the TDS of the produced water will exceed the TDS limita-tion of ship water quality. Moreover, the primary reverse osmosis device has the problem of poor boron removal effect, causing a certain health risk in using desalinated water supplied by the primary reverse osmosis device. Therefore, it is necessary to carry out the secondary advanced treatment. The effects of operating pressure and concentrated water reflux on volume and TDS of the water produced by secondary reverse osmosis were experimentally studied, as well as the boron removal effect of the primary/secondary reverse osmosis process. The results show that the value of TDS of the produced water ranges from 6 - 10.5 mg/L when the operating pressure ranges from 0.89 - 1.05 MPa, which meets the requirement of drinking water quality for warships. The volume of concentrated water reflux has little influence on the volume and TDS of the produced water. When the inlet water temperature ranges from 15?C - 25?C, the boron content of the primary reverse osmosis outlet ranges from 0.6 - 0.9 mg/L, which cannot satisfy the upper limit of 0.5 mg/L stipulated in the Standards for Drinking Water Quality (GB 5749-2006);the boron content of the secondary reverse osmosis outlet ranges from 0.2 - 0.4 mg/L, which meets the requirement.
出处
《环境保护前沿》
2019年第1期26-33,共8页
Advances in Environmental Protection
