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首页> 外文会议>Annual Semiconductor Pure Water and Chemicals Conference(SPWCC): UPW Track; 20050215-16; Santa Clara,CA(US) >Spiral Wound Electrodeionization: An Emerging Energy-Efficient Deionization Process In High Purity Water Systems
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Spiral Wound Electrodeionization: An Emerging Energy-Efficient Deionization Process In High Purity Water Systems

机译：螺旋伤口电去离子：高纯水系统中新兴的节能高效去离子工艺

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Unlike mixed bed deionization systems, electrodeionization (EDI) does not require replacing or regenerating resin beds, eliminating downtown and reducing the usage of hazardous chemicals. One potential benefit of this technology is the elimination of secondary hazardous waste associated with the chemical regeneration of ion exchange resins. Power and semiconductor manufacturers are expanding their management systems beyond the quality focus of ISO 9000 to include environmental performance by becoming ISO 14000 certified. One of the major programs of the ISO 14000 system in the manufacturing facility is the modification of the production process to reduce usage of hazardous chemicals. The cost of complying with environmental regulation is an important driver in the decision to invest in this technology. While the majorities of these systems employ first generation plate and frame designs, the spiral wound version has turn out to be the fastest growing technology in the EDI field. The ready acquiescence of Omexell spiral wound EDI modules in the high purity water generation application is substantiated by more than 40,000 gallons per minute (gpm) of successful installations capacity systems have now been in operation at several micro-electronics and power plants for about three years. The system was developed, patented, and commercialized as the first spiral wound Electrodeionization (SWEDI) system with cathode at the center that employs cross-flow configuration more than three years back. This system represents a breakthrough in desalination of RO permeate water as compared to plate and frame configuration. Associated benefits include a reduction in power consumption, leak-free operation up to 100 psig feed pressure because of the ease of sealing cylindrical pressure vessels, higher feed water hardness tolerance due to unique cross flow operation, ion exchange resins and/ or membranes replacement, excellent electrical insulation due to the use of FRP housing, light module weight, and simple system integration. The main consumable in EDI operating cost is electricity. Electricity is a unique energy source, with significant emissions and a large infrastructure supporting its generation and delivery. Many industries, including electric utilities, will find it important to focus on technologies that save electricity. The development and use of cleaner, more energy-efficient technologies play a significant role in limiting the environmental impacts associated with many industries while enhancing productivity and reducing manufacturing costs. The structural design of the spiral wound EDI devices lower the distance between anode and cathode resulting in less energy needed to remove ionic impurities. The subjects of the present study is the effect of feed water quality, desired product water quality, temperature, and concentrate loop conductivity on the power consumption of the spiral wound EDI modules. The aim of the mathematical modeling developed based on the experimental data in this paper is to obtain a performance equation to estimate the role of each of these factors in the resulting power consumption of the spiral wound EDI modules. The combined effects of escalating chemicals prices and the offsetting lower energy requirements of low pressure RO membranes and spiral wound EDI modules have created a dramatic shift in the economics of high purity water generation.
机译：与混合床去离子系统不同，电去离子（EDI）不需要更换或再生树脂床，从而消除了繁琐的工作并减少了有害化学物质的使用。该技术的一个潜在好处是消除了与离子交换树脂化学再生有关的二次危险废物。电源和半导体制造商正在通过ISO 14000认证，将其管理系统扩展到ISO 9000以外的质量重点，以包括环境绩效。制造工厂中ISO 14000系统的主要计划之一是修改生产过程以减少有害化学物质的使用。遵守环境法规的成本是决定对该技术进行投资的重要驱动力。尽管这些系统的大多数采用第一代板框设计，但螺旋缠绕版本已成为EDI领域中发展最快的技术。 Omexell螺旋缠绕EDI模块在高纯水发电应用中的现成默认值是成功安装的每分钟40,000加仑/分钟（gpm）以上的容量系统已经得到证实，容量系统现已在多个微电子和电厂运行了大约三年。该系统已开发，获得专利并商业化，成为首个以阴极为中心的螺旋卷绕电去离子（SWEDI）系统，该系统采用三年前的错流配置。与板框结构相比，该系统代表了RO渗透水脱盐方面的突破。相关的好处包括降低功耗，由于易于密封圆柱形压力容器而使进料压力达到100 psig时​​无泄漏运行，由于独特的错流操作，离子交换树脂和/或膜片更换而具有更高的进水硬度耐受性，由于使用FRP外壳，轻巧的模块重量和简单的系统集成，因此具有出色的电气绝缘性。 EDI运营成本中的主要消耗品是电。电力是一种独特的能源，其排放量巨大，并且拥有庞大的基础设施来支持其发电和运输。许多行业，包括电力公司，都将重点放在节电技术上变得很重要。更清洁，更节能的技术的开发和使用在限制与许多行业相关的环境影响的同时，还可以提高生产率和降低制造成本。螺旋卷绕EDI装置的结构设计可缩短阳极和阴极之间的距离，从而减少去除离子杂质所需的能量。本研究的主题是给水水质，所需产品水质，温度和浓缩回路电导率对螺旋缠绕EDI模块功耗的影响。本文基于实验数据开发的数学模型的目的是获得一个性能方程，以估计这些因素在螺旋绕制EDI模块产生的功耗中的作用。化学品价格上涨以及低压反渗透膜和螺旋缠绕EDI模块抵消的较低能源需求的综合影响，已经使高纯水生产的经济发生了巨大变化。

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