高回收率反渗透-纳滤海水淡化成本

采用文献[8]提出的代表性费用概念，在相同淡水产量(8．95m^3／d)条件下，讨论了反渗透一纳滤海水淡化工艺产水成本，并与传统一级反渗透海水淡化工艺的产水成本进行了比较，结果表明：新工艺(回收率60％)的总设备直接投资费分别比回收率为20％和40％时的传统工艺下降20．06％和6．27％．其中，预处理设备投资费分别下降43．41％和19％；操作费用中的能源费分别下降13．33％和7．14％．

A COST STUDY OF THE SEAWATER DESALINATION BY REVERSE OSMOSIS-NANOFILTRATION PROCESS

In this paper,using mean standard cost in reference.a comparison between the relative economics of seawater desalination by reverse osmsis-nanofiltration process and single-stage one pass reverse osmosis process for small capacity plants was done.The results showed that,the total direct plant cost for a new integrated membranes desalination(IMD)process lowered by 20.06%and 6.27%respectively in comparison with traditional reverse osmosis process which the recovery rate were 20%and 40%;the pretreatment plant cost was reduced by 43.41%and 19%respecively,the energy cost was reduced by 13.33%and 7.14% respectively.