不同能量回收组合工艺下海水淡化系统比能耗分析  

Specific energy consumption analysis of reverse osmosis desalination system with energy recovery combination processes

作　　者：宋结民 汪程鹏 王生辉 刘军[1] 寇佳文 杨一帆 田修贵 SONG Jiemin;WANG Chengpeng;WANG Shenghui;LIU Jun;KOU Jiawen;YANG Yifan;TIAN Xiugui(Mechanical&Electrical Engineering College,Hainan University,Haikou 570228,China;The Institute of Seawater Desalination and Multipurpose Utilization,MNR,Tianjin 300192,China;Tianjin Blue Cross Membrane Technology Co.,Ltd.,Tianjin 300192,China)

机构地区：[1]海南大学机电工程学院,海南海口570228 [2]自然资源部天津海水淡化与综合利用研究所,天津300192 [3]天津市蓝十字膜技术有限公司,天津300192

出　　处：《工业水处理》2024年第5期212-217,共6页Industrial Water Treatment

基　　金：海南省省重点研发计划项目(ZDYF2021SHFZ057)。

摘　　要：能量回收装置能够降低反渗透海水淡化系统的比能耗与运营成本,是重要的核心节能装备。预设进水流量与回收率均相同的反渗透海水淡化系统,提出无透平单级、单透平单级、双透平双段、单透平段间增压这4种组合工艺,对反渗透系统进行工艺路线设计和设备选型研究。为验证组合工艺的性能,选取两种计算方式对系统比能耗进行分析。结果表明,能量回收技术能够降低系统比能耗,通过对透平式能量回收装置进行优化组合,特别是双透平双段式和单透平段间增压式的组合工艺能够大幅降低系统比能耗和综合成本。Energy recovery devices can reduce the specific energy consumption and operation cost of reverse osmosis desalination systems,which is an important core energy-saving equipment.In this paper,four combined processes were proposed,including turbine-free single-stage,single-turbine single-stage,dual-turbine two-stage,and single-turbine interstage pressurization for reverse osmosis seawater desalination systems,whilst ensuring the same influent flow rate and recovery rate.The whole process routes and equipment selection were also studied.To evaluate the performance of the combined process,the specific energy consumption ratios were analyzed with two different energy consumption ratio analysis methods.The results showed that energy recovery technology can reduce system-specific energy consumption.Optimizing the combination of turbine energy recovery devices,especially the combination process of dual-turbine doublestage desalination system and single-turbine inter-stage pressurized desalination system can significantly reduce the specific energy consumption and overall cost of the system.

关 键 词：海水淡化 反渗透 比能耗 能量回收装置 

分 类 号：X703[环境科学与工程—环境工程]