成果報告書詳細
管理番号20120000001037
タイトル*平成23年度中間年報 最先端PG(Mega-ton Water System) 高効率・大型分離膜エレメント・モジュール 高効率・大型RO膜中空糸型モジュール
公開日2012/9/28
報告書年度2011 - 2011
委託先名東洋紡績株式会社
プロジェクト番号P09025
部署名環境部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果等
(1)市場情報・技術情報収集
a.大型モジュール動向およびコストメリットの調査と市場動向・技術調査
海外および、国内の学会・シンポジウムへの参加、聴講等を通じて情報入手を行なった。膜モジュールの大型・大口径化の主流は、16 インチ径×1 m 長サイズの膜エレメントとなっており、国内外問わず、膜メーカー各社( 主としてスパイラル型)が製品化を
進めている。
英文要約1) Market Information and Technical Information Analysis: Attending international and national symposia from the pervious year, we gathered information of current situation and cost benefit of large-scale module. The major dimension of large-scale module at present is 16 inch in diameter, and large-scale plants with more than 100,000m3/day capacity are working on commercializing these types of module. The largest module which diameter is 18 inch as minority has been under a field test in South America. A study shows that, in case of spiral-wound type module, the cost benefit decreases as the size of module gets larger than 16 inch in diameter. Also a large-scale plant has been verifying the arrangement (vertical arrangement) and long-term performance stability of large-scale module. Reflecting what the results have shown, improvements in the structure and parts of large-scale module are under consideration. Any reports on large-scale hollow fiber module of 16 inch in diameter have not been officially released. 2) Large-Scale Element for Reverse Osmosis Membrane Module: a) Study of Basic Module Arrangement: a)-1 Analysis of Stress to Constituent Parts of RO Module: Due to applying large scale modules, constituent parts of RO module require higher strength. Therefore, we started analyzing the stress to distribution feed pipe from the previous year. This year, a mechanical strength test was conducted on perforated distribution feed pipes which were made from fiber-reinforced composite. Using 1/2 solid component with anisotropic property considered symmetry; we analyzed the material property of fiber-reinforced distribution feed pipe using conventional analysis software, Abaqus 6.11-1. We compared the strength of perforated distribution feed pipes to that of non-perforated distribution feed pipes and confirmed that the biggest difference in estimated load between perforated and non-perforated was about 10%, and we will reflect this result on the design of large-scale element. b) Estimation of Basic Performance and Simulation of Large-Scale RO Performance: b)-1 RO Module Performance Estimation: We estimated the large-scale module performance to stimulate the mass transfer phenomenon in RO module using the factors of bore side pressure and packing density of hollow fiber membrane. To improve hollow fiber performance, we estimated the effects of fiber arrangement. For next year, we will continue to consider and design pressure vessels and module parts for manufacture. b)-2 Flow Characterization Analysis in RO Module: Basing on the widely used Computational Fluid Dynamics (CFD) software, ANSYS Fluent, we built a structural model to observe the flow in RO module. With this model, we are planning to estimate the effects caused by sizing up the diameter on changes in flow and such. Also for the pressure loss in module, Ergun equation is used. For next year, we will keep working on the flow, and reflect its results on best suited design for large-scale module. 3) Manufacturing Technology of Large-Scale RO Module: a) Study of Basic Manufacturing Technology: Based on our estimation for large-scale RO module performance, we manufactured a special equipment to make crossly-arranged hollow fiber elements for large scale module last year. To make the crossly-arranged hollow fibers into a membrane element, we designed and built (1)hollow fiber bonding equipment and (2)membrane element cutting equipment. Using the said equipment, we will work on manufacturing technology of large-scale element, and establish a basic technology for manufacturing large-scale hollow fiber elements.
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