成果報告書詳細
管理番号20120000001049
タイトル*平成23年度中間年報 最先端PG(Mega-ton Water System) 100万m3/日規模大型プラント構成最適化~海水淡水化プラントシミュレーター
公開日2012/9/28
報告書年度2011 - 2011
委託先名株式会社東芝
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
メガトン規模の海水淡水化プラントの造水コスト評価を行えるシミュレータ開発を目的として、今年度はプラントを構成する機器・配管、水質反応などの(1)モデル作成と、GUIを含む(2)プロトタイプシミュレータの構築と評価を行った。以降では、(1)、(2)の内容と成果を説明する。
英文要約This research programme aims to develop the Sea-water Desalination Plant Simulator (SDPS) for a prior evaluation of process design of general Sea-Water Reverse Osmosis (SWRO) process. The SDPS covers the estimation of long-term operational cost containing pumping power consumption, chemical cleaning and membrane replacement cost. The essential challenge of SDPS is that overall performance of SWRO is always affected by the permeability of Reverse Osmosis (RO) membrane and the variety of sea-water conditions such as sea-water temperature, salinity, and turbidity. Especially, severe fouling may require intense chemical cleaning or membrane replacement, which results in the increase of the long-term operational cost in SWRO process.  Thus the goals of this programme are: (1) To evaluate unit desalination cost containing capital cost and long-term operational cost, (2) To optimize major design parameters such as RO recovery rate and the number of RO membrane under the variety of sea-water condition and the RO membrane permeability. (1)Modelling for evaluation of unit desalination cost We have evaluated existing mathematical models on process components of general SWRO process, which includes piping system models, pre-treatment process models, RO membrane models and sea-water chemical and biological reaction models. In order to evaluate a long-term operational cost, we have confirmed that the modeling of ion concentration polarization phenomenon, included in the RO membrane models, will be crucial. (2) Development of SDPS for prior evaluation to design an appropriate process configuration We have constructed a prototype simulator of SDPS based on the above models. The prototype can calculate RO membrane inlet pressure, RO recovery rate and acid / alkali quality of the water. The prototype has graphical user interface (GUI) which consists of the selection interface of SWRO process, the input interface of operational conditions and sea-water conditions, and the output interface of operational cost. Then we have evaluated the accuracy of the simulation by comparing the output of the developed simulator and that of the real data acquired by the bench-scale pilot plant. The test data of RO membrane inlet pressure show the average of simulation error is 2.7% with acceptable accuracy. For further study, we are expanding the prototype into SDPS for evaluating unit desalination cost with recent large scale desalination installations.
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