自增压式能量回收装置的开发与效能分析

发布时间：2018-01-07 22:07

本文关键词：自增压式能量回收装置的开发与效能分析　出处：《天津大学学报(自然科学与工程技术版)》2016年08期 　论文类型：期刊论文

【摘要】：针对中小型海水/苦咸水淡化系统简化工艺、降低能耗的要求,在海水淡化阀控式能量回收装置的基础上,设计开发了一种自增压式能量回收装置.该装置利用差压式水压缸替代阀控式装置中原有的等径压力交换缸,实现能量回收功能和压力提升功能的有机结合.将自增压式能量回收装置与纳滤脱盐系统耦合,在进水水质为苦咸水(1.06%)、操作压力为2.0 MPa条件下研究分析了自增压式能量回收装置与纳滤脱盐系统的耦合运行特性及对系统节能降耗的贡献.结果表明,自增压式能量回收装置现场运行稳定性良好,能量回收效率为95.55%,与未配备自增压式能量回收装置的系统相比,节能降耗贡献率达27.61%,与配备阀控式能量回收装置的系统相比,不仅简化了工艺,而且降低了系统投资和产水能耗.
[Abstract]:In order to simplify the process and reduce the energy consumption of seawater / brackish water desalination system, it is based on the valve-controlled energy recovery device for seawater desalination. A self-pressurized energy recovery device is designed and developed in which the differential pressure hydraulic cylinder is used to replace the original equal-diameter pressure exchange cylinder in the valve-controlled device. The self-pressurized energy recovery device is coupled with the nanofiltration desalination system, and the water quality of the influent is bitter salt water (1.06%). Under the operating pressure of 2.0 MPa, the coupling operation characteristics of the self-pressurized energy recovery unit and the nanofiltration desalting system and its contribution to the energy saving and consumption reduction of the system are studied and analyzed. The energy recovery efficiency is 95.555.Compared with the system without the self-pressurized energy recovery device, the contribution rate of energy saving and consumption reduction is 27.61%. Compared with the system equipped with valve-controlled energy recovery device, it not only simplifies the process, but also reduces the system investment and energy consumption of water production.
【作者单位】：天津大学化工学院;天津市膜科学与海水淡化技术重点实验室;天津化学化工协同创新中心;
【基金】：天津市科技兴海计划资助项目(KJXH2012-03) 天津市海洋经济创新发展区域示范项目(CXSF2014-10)
【分类号】：P747
【正文快照】： 膜法海水/苦咸水淡化系统中,脱盐膜组件会产生一定比例(20%~60%)的高压浓水[1-3],这部分高压浓水如果直接排放会造成较大的能量浪费.采用能量回收装置高效回收利用高压浓水的压力能,是目前国内外普遍采用的节能降耗手段和有效方法[4-5].现有的能量回收装置主要采用等压式工作

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