共查询到20条相似文献,搜索用时 171 毫秒
1.
针对目前舰船上广泛使用的真空式海水淡化装置进行热力分析,建立起海水淡化装置的数学模型,以50t/d真空式海水淡化装置为例,通过对不同蒸发温度和不同工作蒸汽压力进行模拟计算,得到海水淡化装置的产水量、工作蒸汽耗量及冷却水流量随蒸发温度和工作蒸汽压力的变化规律,所得结论与装置的实验及实际运行情况有很好的一致性,证明所建立的数学模型是合适的,所得结论可以指导装置的使用管理及海水淡化装置的设计。 相似文献
2.
3.
4.
5.
6.
7.
为了缓解我国淡水缺乏的现状,将海水进行淡化成了一个主要的研究方向。针对传统海水淡化方法属高耗能产业,并且使用常规能源,对环境易造成二次污染的缺陷,介绍了一种基于非并网多能源协同供电的海水淡化系统。该系统基于非并网风电原理,利用风、光、潮汐等绿色能源对海水淡化系统供电,提高了能源的利用效率,实现二氧化碳的零排放,具有很好的社会经济效益。本文设计并研发了一套单台风机日产万吨海水淡化系统,该系统利用1台2.5 MW风机对海水淡化系统供电,基于非并网风电理论,做到了风电高效、低成本、全部利用。 相似文献
8.
通过对热力蒸汽压缩式海水淡化装置的分析,建立起其数学模型,模拟计算结果表明,与一般蒸汽直接加热式真空海水淡化系统比较,采用热力蒸汽压缩式海水淡化系统,其能耗明显降低.此外,对不同的蒸发温度下的工作蒸汽耗量进行了模拟计算,所得结论对热力蒸汽压缩式海水淡化系统的设计与使用管理有指导意义。 相似文献
9.
在热法蒸馏技术类型的海水淡化项目中,钛焊管是作为海水淡化设备装置蒸发器和冷凝器的导热管(换热管)及其他需要经常与海水接触的管道的首选材料。本文即主要介绍钛焊管在海水淡化领域中的应用优势,同时也客观阐述目前钛焊管还没有在海水淡化中广泛使用的原因。 相似文献
10.
11.
12.
This study looks into the possibilities of hydrogen production in the north coast and red-sea Zone, Egypt, to conver renewable energy to hydrogen (power to gas). The main purpose is to estimate the power needed for each kg of hydrogen production from seawater using renewable energy and then the quantity of desalinated seawater needed to cover this cost. We will discuss different scenarios; the main two scenarios are photovoltaic (PV) solar with reverse osmosis (RO) desalination and concentrating solar power (CSP) with multi-effect desalination (MED). 相似文献
13.
14.
15.
Ali Altaee Graeme J. Millar Guillermo Zaragoza Adel Sharif 《Clean Technologies and Environmental Policy》2017,19(1):77-91
Forward osmosis (FO) has been proposed as an alternative method for seawater desalination, wherein reverse osmosis (RO) membrane technology is used for regeneration of the draw solution. Previous studies have indicated that a standalone RO unit is more energy efficient than an FO–RO system, and as such it was recommended that an FO–RO system is best employed only for the desalination of high-salinity seawaters. This study examined FO–RO applicability in more detail by examining the impact of seawater salinity, impact of an energy recovery device (ERD), and the effect of membrane fouling. For comparison purposes, the performance of the FO process was improved to minimize the impact of concentration polarization and optimize the concentration of draw solution. Model calculations revealed that FO–RO is more energy efficient than RO when no ERD was employed. However, results showed that there was no significant difference in the power consumption between the FO–RO system and the RO unit at high seawater salinities particularly when a high-efficiency ERD was installed. Moreover, the FO–RO system required more membrane area than a conventional RO unit which may further compromise the FO–RO desalination cost. 相似文献
16.
17.
Water desalination is an important approach to provide fresh water around the world, although its high energy consumption, and thus high cost, call for new, efficient technology. Here, we demonstrate the novel concept of a "desalination battery", which operates by performing cycles in reverse on our previously reported mixing entropy battery. Rather than generating electricity from salinity differences, as in mixing entropy batteries, desalination batteries use an electrical energy input to extract sodium and chloride ions from seawater and to generate fresh water. The desalination battery is comprised by a Na(2-x)Mn(5)O(10) nanorod positive electrode and Ag/AgCl negative electrode. Here, we demonstrate an energy consumption of 0.29 Wh l(-1) for the removal of 25% salt using this novel desalination battery, which is promising when compared to reverse osmosis (~ 0.2 Wh l(-1)), the most efficient technique presently available. 相似文献
18.
19.
本文对聚丙烯中空纤维膜在海水淡化中的老化现象进行了研究,采用差热扫描、傅立叶变换红外分析、扫描电镜等方法对聚丙烯中空纤维膜在海水中应用前后的结构变化进行了表征,通过多组比对浸泡实验,分析了聚丙烯中空纤维膜海水浸泡后强度降低的原因,并对如何防止聚丙烯中空纤维膜在海水中快速老化,提高其使用寿命进行了讨论。 相似文献
20.
反渗透膜分离技术的创新性进展 总被引:1,自引:0,他引:1
水是地球上不可替代的宝贵的自然资源,是人类赖以生存和生产的不可缺少的基本物质.当前缺水已成为世界性问题,成为制约社会进步和经济发展的瓶颈,解决水资源的供需矛盾,对我国的可持续发展是非常迫切的和重要的.用海水淡化技术向大海要淡水,是自古以来人们所梦寐以求的,现在已变为现实,其中反渗透法海水淡化发展最为迅速,不仅技术上完全可行,而且在许多情况下是最经济的选择.简述了自上世纪50年代以来反渗透法海水淡化(SWRO)的提出和发展概况;重点介绍了反渗透不对称膜和复合膜的发展,特别是复合膜品种的不断增多与性能的不断改进和提高;中空纤维和卷式反渗透膜组器技术的创新,特别是卷式反渗透膜组器的设计和制备技术的改进及组器的性能提高和大型化;效率不断提高的高压泵和能量回收装置,特别是能量回收装置结构形式的不断改进和能量回收效率的不断提高;实用于不同要求的各种SWRO工艺,如二级海水淡化工艺、一级海水淡化工艺、高压一级海水淡化工艺、高效两段海水淡化工艺、SWRO与纳滤(NF)、与多级闪蒸(MSF)或多效(MED)集成的海水淡化工艺以及微滤(MF)或超滤(UF)作为预处理等,另外,简述了大型反渗透法海水淡化厂对环境的影响,如与能耗相关的CO2的排放、浓海水排海、占地、噪音和景观等;最后对反渗透技术的延伸进行了简介. 相似文献