化工进展2017，Vol.36Issue(6)：2051-2056,6.DOI:10.16085/j.issn.1000-6613.2017.06.012
碳酸氢铵为汲取液正渗透海水淡化研究
Study on seawater desalination by ammonium bicarbonate forward osmosis process
摘要
Abstract
Forward osmosis(FO)is becoming one of the hot spots in the field of membrane technology due to low fouling,low energy consumption and high water recovery.In the present work,forward osmosis for seawater desalination was carried out by using ammonium bicarbonate(NH4HCO3) solution as draw solution and 0.6mol/L sodium chloride(NaCl)solution as simulated seawater, followed by NH4HCO3 recovery through partial desorption/absorption. A series of experiments were conducted to investigate the effect of operating conditions on water flux,ammonia absorption rate, ammonia desorption rate and specific energy consumption. The results indicated that the water flux of FO system increased with increasing draw solution concentration,flowrate of draw solution or feed solution. Ammonia absorption rate of the absorption column increased with the increase of draw solution flowrate. The operating conditions had little influence on the ammonia desorption rate in the desorption column. In addition,the energy consumption of FO desalination system was mainly utilized in the draw solution desorption process. Thus,decreasing the inlet draw solution concentration of desorption column could reduce the specific energy consumption. Under optimal experimental conditions,the total specific energy consumption was about 195kW·h/m3 of product water. The water flux of FO system was around 13.6L/(m2·h),and NH4HCO3 reclamation rate was 99% with total dissolved solids(TDS)of product water below 1000mg/L. These results provide guidance for further industrial applications of forward osmosis process.关键词
正渗透/脱盐/碳酸氢铵/解吸/吸收Key words
forward osmosis/desalination/ammonium bicarbonate/desorption/absorption分类
海洋科学引用本文复制引用
高婷婷,解利昕,徐世昌,冯丽媛,杜亚威,周晓凯..碳酸氢铵为汲取液正渗透海水淡化研究[J].化工进展,2017,36(6):2051-2056,6.基金项目
国家科技支撑计划(2015BAB10B01,2014BAB04B01)、国家重点研发计划( 2016YFC0401200 )及国家自然科学基金(21606067)项目. （2015BAB10B01,2014BAB04B01）
