Development and Application of Heat Resistant Spiral Type RO Membrane in Nitto Denko Co., Ltd.

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  • 日東電工（株）における耐熱性スパイラル型 膜エレメントの開発と用途展開
  • ヒ トウデンコウ(カブ)ニ オケル タイネツセイ スパイラルガタマク エレメント ノ カイハツ ト ヨウト テンカイ

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Abstract

In recent years, RO membranes have further expanded the results of activities at large plants in the field of seawater desalination and wastewater reuse. In these plants, the raw water is usually treated as it is at normal temperature (probably 5 ℃ to 40 ℃). However, when the raw water exceeds 45 ℃, it is necessary to cool the raw water once for membrane treatment because the heat resistance of the RO membrane element is not high. In the case where the raw water is at a high temperature and the treated water is also used at a high temperature again, an operation of cooling the raw water, followed by membrane treatment and then reheating the treated water, is required, and the loss of thermal energy is large and uneconomical. In this paper, we introduce the application development of heat resistant RO membrane in Nitto Denko and the case of its merit.

Journal

  • MEMBRANE

    MEMBRANE 44 (4), 169-173, 2019

    THE MEMBRANE SOCIETY OF JAPAN

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