多相流蒸发法高浓缩率海水淡化系统的热力学性能分析  

THERMODYNAMIC ANALYSIS OF MULTIPHASE FLOW EVAPORATION SEAWATER DESALINATION SYSTEM WITH HIGH CONCENTRATION RATE

作　　者：郑飞飞[1] 杜亚威[1] 刘燕[1] 张少峰[1] 

机构地区：[1]河北工业大学化工学院,海水资源高效利用化工技术教育部工程研究中心,天津300130

出　　处：《水处理技术》2014年第11期52-56,60,共6页Technology of Water Treatment

基　　金：河北省科学技术研究与发展计划项目(12276711D)

摘　　要：建立了顺流进料的多相流蒸发法高浓缩率海水淡化系统的数学模型,考虑了热力损失、压力损失、盐水含量变化引起的温差损失;计算分析了相同淡水产量下固体颗粒体积分数、预热量、首效加热蒸汽温度对系统的影响。结果表明,固体颗粒体积分数和首效加热蒸汽温度对各效蒸发器传热面积影响较大;预热量对生蒸汽耗量影响较大;固体颗粒的加入能够强化传热,减小各效蒸发器的传热面积;在无预热情况下,固体颗粒体积分数为13%时,蒸发器总传热系数比固体颗粒体积分数为3%时可增大6.71%,各效蒸发器传热面积减少4.97%,淡水成本减少1.22%。The mathematic model of forward feed multiphase flow evaporation seawater desalination system with high concentration rate is established,and the temperature losses caused by the heat loss, the pressure loss, and the variation of brine concentration are taken into consideration. The effects of solid particle volume fraction, the amount of pre-heating heat, and the first effect heating steam temperature are analyzed under the same water production requirement. The results show that, the solid particle volume fraction and the first effect heating steam temperature have significantly influence on the heat transfer area of each effect. The amount of pre-heating heat could obviously influence the dawdling steam consumption. The introduced of the solid particles can strengthen heat transfer, as a result, the heat transfer area of each effect decreased. When the solid particle volume fraction is 13% and without pre-heating, the evaporator heat transfer coefficient can be increased by 6.71%, the evaporator heat transfer area of each effect can be reduced by 4.97%,and the unit product cost can be reduced by 1.22%, compared with the system when the solid particle volume fraction is 3%.

关 键 词：多相流 蒸发 脱盐 热力学 模型 

分 类 号：P747.13[天文地球—海洋科学]