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FILTER AND METHOD OF FILTRATION 新技術説明会

外国特許コード F090002154
整理番号 QP070044-PC
掲載日 2010年1月15日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2008JP002286
国際公開番号 WO 2009/028163
国際出願日 平成20年8月25日(2008.8.25)
国際公開日 平成21年3月5日(2009.3.5)
優先権データ
  • 特願2007-224898 (2007.8.30) JP
発明の名称 (英語) FILTER AND METHOD OF FILTRATION 新技術説明会
発明の概要(英語) A filter with which a raw water can be treated at a high flow rate in a short time and bacteria can be removed from the raw water to a high level by a physical treatment only. Also provided is a method of filtration. The filter comprises a spring filter (2) and, disposed upstream therefrom, a first precoat layer (A) constituted of a layer of a filter aid (41) and a second precoat layer (B) constituted of a layer of a filter aid (42). A raw water is caused to flow from the side of the second precoat layer (B) and filtered. This filter is characterized in that the filter aid (41) has a particle size distribution mainly constituted of coarse particles which aggregate at the gaps between the spring loops due to flows in water passing and part of which form bridges covering the gaps, while the filter aid (42) has a particle size distribution mainly constituted of fine particles which are smaller than the filter aid (41) and which themselves cannot form bridges over the gaps. The filter is further characterized in that the size of the gaps between the loops of the spring filter (2) and the size of the particles of the second precoat layer (B) are governed by the first precoat layer (A), which is held by the spring filter (2) due to the bridge phenomenon.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • Kyushu University, National University Corporation
  • 発明者(英語)
  • Shinoda, Takeshi
  • Mononobe, Sakiyori
国際特許分類(IPC)
指定国 AE AG AL AM AO AT AU AZ BA BB BE BF BG BH BJ BR BW BY BZ CA CF CG CH CI CM CN CO CR CU CY CZ DE DK DM DO DZ EC EE EG ES FI FR GA GB GD GE GH GM GN GQ GR GT GW HN HR HU ID IE IL IN IS IT JP KE KG KM KN KP KR KZ LA LC LK LR LS LT LU LV LY MA MC MD ME MG MK ML MN MR MT MW MX MY MZ NA NE NG NI NL NO NZ OM PG PH PL PT RO RS RU SC SD SE SG SI SK SL SM SN ST SV SY SZ TD TG TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
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