基于低温蒸馏-喷雾蒸发集成工艺的海水淡化  

Seawater desalination based on low temperature distillation and spray evaporation

作　　者：侯经纬[1] 成怀刚[1] 伍联营[1] 高从堦[1] 

机构地区：[1]中国海洋大学化学化工学院

出　　处：《化学工程》2010年第8期94-97,共4页Chemical Engineering(China)

基　　金：国家“十一五”科技支撑计划项目(2006BAB03A04);山东省科技攻关项目(2007GG10005001)

摘　　要：考察了利用低温蒸馏-喷雾蒸发集成工艺进行海水深度淡化的可行性,使用喷雾蒸发技术深度浓缩蒸馏淡化过程排出的浓盐水,并将余热用于驱动蒸馏过程。考察了蒸馏柱进液量、浓盐水喷雾量、加热空气温度及流速对淡水产量的影响。结果表明,较高的加热空气温度有利于淡水产量的提高,而为获得较高的淡水产量,加热空气流速、浓盐水喷雾量以及蒸馏柱进液量则应控制在一定的范围之内,即10—15 m3/h,0.4—0.6 kg/h和0.8—1 kg/h。对于该集成装置,蒸馏柱淡水产量、总淡水产量及淡水产量与输入淡化系统的蒸汽当量之比（造水比）分别可达5 kg/（h.m^2）,1 kg/h及1.2,回收率可以达到70%以上。The feasibility of seawater deep desalination by the integrated process of low temperature distillation and spray evaporation was examined.In the process the distillation brine was further concentrated by using spray evaporation and the waste heat was used to drive the distillation.The effects of feed rate of distillate column,brine spray rate,temperature and flow rate of heating air on the fresh water yield were examined.The result shows that higher heating air temperature is good for raising fresh water yield.To obtain higher fresh water yield,higher heating air temperature and suitable operating ranges for flow rate of heating air,brine spray rate and feed rate of distillate column are required as 10-15 m3/h,0.4-0.6 kg/h and 0.8-1 kg/h,respectively.For the whole process,column fresh water productivity,gross fresh water production,gained output ratio（GOR） which is the ratio of gross fresh water productivity to steam equivalence entering desalination system,and recovery rate can reach 5 kg/（h· m^2）,1 kg/h,1.2 and 70% respectively.

关 键 词：海水淡化 喷雾蒸发 回收率 热效率 

分 类 号：P747.1[天文地球—海洋科学]