Field Tests on Silica Removal from Geothermal Brines in Sumikawa and Onuma Geothermal Areas.

• Sugita Hajime

  Geo-Energy Division, Geotechnology Department, National Institute for Resources and Environment

• Kato Koichi

  Central Institute of Mitsubishi Materials Corporation

• Ueda Akira

  Central Institute of Mitsubishi Materials Corporation

• Matsunaga Isao

  Geo-Energy Division, Geotechnology Department, National Institute for Resources and Environment

• Sakurai Yukio

  Department of Chemical Engineering, Nagoya University

• Yasuda Keiji

  Department of Chemical Engineering, Nagoya University

• Bando Yoshiyuki

  Department of Chemical Engineering, Nagoya University

• Nakamura Masaaki

  Department of Chemical Engineering, Nagoya University

抄録

In a study on prevention of silica scale formation in geothermal applications, two silica removal methods were examined using actual geothermal brine in the Sumikawa and Onuma geothermal areas: one was the addition of silica gel seeds. The other was the addition of aluminum ions.<BR>The results for silica gel seed show that the material precipitates on the seeds withdrawn from Sumikawa and model geothermal brine is only silica. On the other hand, the seeds withdrawn from Onuma brine contain not only silica but a small amount of aluminum. In the case of aluminum ion addition, the deposits withdrawn from Sumikawa geothermal brine contain not only silicon and aluminum, but also sodium, potassium and calcium. The composition of the deposits is similar to that of common silica scale. Also, the distribution ratios of these elements between the deposits and the brine are consistent with their common distribution ratios between silica scale and brine. In each case of silica gel seed and aluminum ion addition, the silica removal performance in the actual geothermal brines is found to agree with that in the model ones. Therefore results obtained in model geothermal brine can be applied to actual geothermal brine.

収録刊行物

• JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 32 (5), 696-700, 1999

  公益社団法人 化学工学会

キーワード

• Silica Removal
• Seeding Method
• Silica Gel Seed
• Aluminum Ion
• Precipitation

詳細情報

• CRID: 1390001204565225856
• NII論文ID: 10006962124
• NII書誌ID: AA00709658
• DOI: 10.1252/jcej.32.696
• COI: 1:CAS:528:DyaK1MXntVSks7o%3D
• ISSN: 18811299
• ISSN: 00219592
• NDL書誌ID: 4886920
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4886920
• Web Site: http://www.jstage.jst.go.jp/article/jcej/32/5/32_5_696/_pdf
• 本文言語コード: en
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可