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Title:
METHOD AND DEVICE FOR CLEANING FILTER CLOTHS OF FILTER PRESS DEWATERER
Document Type and Number:
WIPO Patent Application WO/2010/004955
Kind Code:
A1
Abstract:
Provided is a method and a device for cleaning filter cloths of a filter press dewaterer that do not use acid, which requires wastewater treatment, and that allow regeneration of filter cloths by effectively cleaning the filter cloths while controlling the amount of water used for cleaning. The method is for cleaning filter cloths of a filter press dewaterer, which dewaters slurries containing calcium components by means of water, steam or a mixture thereof. The filter cloths are cleaned by spraying water of 100‑140°C temperature and 50‑200 kg/cm2 pressure, steam of 100‑140°C temperature, or a mixture thereof, on said filter cloth, whereon tension of 10‑2000 N/5 cm has been applied.

Inventors:
KATAKURA, Masahiko (6-4, Tsukiji 5-chome, Chuo-k, Tokyo 39, 〒1048439, JP)
片倉 正彦 (〒39 東京都中央区築地5丁目6番4号 三井造船株式会社内 Tokyo, 〒1048439, JP)
SUZUKI, Takao (6-4, Tsukiji 5-chome, Chuo-k, Tokyo 39, 〒1048439, JP)
鈴木 隆男 (〒39 東京都中央区築地5丁目6番4号 三井造船株式会社内 Tokyo, 〒1048439, JP)
Application Number:
JP2009/062286
Publication Date:
January 14, 2010
Filing Date:
July 06, 2009
Export Citation:
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Assignee:
MITSUI ENGINEERING & SHIPBUILDING CO., LTD. (6-4 Tsukiji 5-chome, Chuo-ku Tokyo, 39, 〒1048439, JP)
三井造船株式会社 (〒39 東京都中央区築地5丁目6番4号 Tokyo, 〒1048439, JP)
TAIHEIYO CEMENT CORPORATION (Daibagardencitybuilding, 3-5 Daiba 2-chome, Minato-k, Tokyo 78, 〒1358578, JP)
太平洋セメント株式会社 (〒78 東京都港区台場2丁目3番5号 台場ガーデンシティビルディング Tokyo, 〒1358578, JP)
KATAKURA, Masahiko (6-4, Tsukiji 5-chome, Chuo-k, Tokyo 39, 〒1048439, JP)
片倉 正彦 (〒39 東京都中央区築地5丁目6番4号 三井造船株式会社内 Tokyo, 〒1048439, JP)
International Classes:
B01D25/12; B01D33/04; B01D41/04; C02F11/12
Attorney, Agent or Firm:
OGAWA, Shin-ichi et al. (Seiryu International Patent Office, 37 Kowa Building4-5, Tsukiji 1-chome, Chuo-ku, Tokyo 45, 〒1040045, JP)
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