[특허]Method of back-washing submerged-type ceramic membrane separation apparatus

Method of back-washing submerged-type ceramic membrane separation apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-062/02
출원번호	US-0349014 (1994-12-02)
우선권정보	JP-0115783 (1994-05-30)
발명자 / 주소	Kawanishi Toshio (Osaka JPX) Yokoyama Shigeki (Osaka JPX) Ishihara Katsuro (Osaka JPX) Narukami Yoshihisa (Osaka JPX) Shioyama Masahiko (Osaka JPX) Tokushima Mikiharu (Osaka JPX) Ozaki Toshiya (Osaka
출원인 / 주소	Kubota Corporation (JPX 03)
인용정보	피인용 횟수 : 96 인용 특허 : 0

초록 ▼

A method for back-washing a submerged-type ceramic membrane separation apparatus is provided in which filtrate once removed from the apparatus and a chemical agent are forcibly supplied to filtrate passages in ceramic membrane filters to wash the ceramic membrane filters with the filtrate and with the chemical agent, wherein the water washing and chemical washing are carried out at a predetermined frequency ratio and for a predetermined time period, or wherein the frequency and time period of the chemical washing are determined on the basis of a transmembrane pressure difference, suction pressure or filtrate flux observed during a filtering operation performed by the membrane separation apparatus. This method makes it possible to avoid an excessive chemical washing, and to reduce the amounts of water and chemical agent and the time required for the chemical washing.

대표청구항 ▼

A method for back-washing a ceramic membrane separation apparatus adapted to be submerged in treatment water contained in a water treatment vessel, said method comprising the step of: forcibly supplying filtrate from the apparatus and a chemical agent, separately, to filtrate passages in ceramic membrane filters to wash the ceramic membrane filters with the filtrate during a water washing and to wash the ceramic membrane filters with the chemical agent during a chemical washing, wherein the water washing and the chemical washing are carried out on the basis of a predetermined frequency ratio and a predetermined time period, said time period of the water washing being between approximately 0.5 seconds and 60 seconds, in order to forcibly supply the filtrate to the filtrate passages to provide an applied pressure acting on the ceramic membrane filters, and said time period of the chemical washing being between approximately 10 seconds and 300 seconds, in order for the chemical agent to be forcibly supplied to the filtrate passages to thoroughly permeate the ceramic membrane filters.

이 특허를 인용한 특허 (96)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method of back-washing submerged-type ceramic membrane separation apparatus 원문보기

초록 ▼

대표청구항 ▼

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Method of back-washing submerged-type ceramic membrane separation apparatus 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (96)

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