Studies of Simulation Method Based on Concentration Polarization Theory for Reverse Osmosis Seawater Desalination Plant

• TANIGUCHI Masahide

  Toray Industries, Inc

• KIHARA Masahirio

  Toray Industries, Inc

• YAMAMURA Hiroyuki

  Toray Industries, Inc

• KURIHARA Masaru

  Toray Industries, Inc

Bibliographic Information

Other Title

• 濃度分極モデルに基づく逆浸透法海水淡水化プラントの性能シミュレーションに関する研究
• ノウド ブンキョク モデル ニ モトヅク ギャクシントウホウ カイスイ タンスイカ プラント ノ セイノウ シミュレーション ニ カンスル ケンキュウ

Abstract

Reverse osmosis membrane processes are effecient in terms of energy and widely used in the desalination field. Recently, a new scheme of reverse osmosis seawater desalination, which is called a brine conversion twostage process, was proposed by Toray Industries, Inc. In this process, a second stage is added to a conventional RO unit, and the concentrated brine from the unit is further desalinated at the second stage to increase the water recovery ratio over 40% to 60%. The recovered energy from the first stage brine is used to pump the feed to the second stage up to approximately 10 MPa. For this purpose, a new membrane, UTC-80BCM, has been developed besides the conventional UTC-80. A test plant based on this scheme (210m³/day) was built at Ehime factory, Toray, Inc. and was operated under a wide range of conditions.<BR>The purpose of this work is to establish the calculation method for RO process for seawater desalination. In this research, first, we measured the membrane properties and the mass transfer coefficients of each spiral-type element, SU-820 and SU-820BCM, which use UTC-80 and UTC-80BCM. Next, we developed a computer program based on the concentration polarization model. In this calculation, we consider the change of the membrane itself in terms of operating conditions, the temperature, and the pressure, whose corrections are determined from the laboratory experiments. Finally, the test plant data under the various operating conditions were taken and a calculation method was successfully verified.<BR>As a result, this method enables us to obtain membrane transport parameters from running plant data to find the causes of membrane fouling under various operationg conditions, and to predict the plant performance, which is necessary for us to design the process.

Journal

• Bulletin of the Society of Sea Water Science, Japan

  Bulletin of the Society of Sea Water Science, Japan 56 (3), 247-255, 2002

  The Society of Sea Water Science, Japan

Keywords

• concentration polarization
• reverse osmosis
• seawater desalination
• mass transfer coefficient salt rejection
• product flowrate

Details

• CRID: 1390282680429986304
• NII Article ID: 10008278256
• NII Book ID: AN0018645X
• DOI: 10.11457/swsj1965.56.247
• NDL BIB ID: 6171385
• ISSN: 03694550
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6171385
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed