公开(公告)号：JPH11216469A

公开(公告)日：1999-08-10

申请号：JP3200698

申请日：1998-01-29

Applicant: TORAY INDUSTRIES

Inventor： IMAI KAZUO ,  SHIYAMA TAKUROU ,  ABE YOSHIHIRO

IPC: B01D61/04 ,  B01D27/02 ,  B01D63/10 ,  B01D69/12 ,  B01D71/16 ,  B01D71/52 ,  B01D71/56 ,  C02F1/44

Abstract: PROBLEM TO BE SOLVED: To facilitate the maintenance, to miniaturize a preservation space and to rapidly and simply generate a fresh water by forming a filter unit and a separation membrane unit to directly connect to each other through a common head. SOLUTION: A feed water from a feed water line 1 is supplied into the filter unit 20 from a head part 2 directly connected to the filter unit 20 and the separation membrane unit 30. The back flow is prevented by preferably providing a non-return corn constituted of a polypropylene-made-ball and a spring in an inlet of the filter unit 20. The filter unit 20 has a cartridge type filter element 3 and absorbs and remove fine particles, a dissolved gas or the like in the feed water to supply to a module vessel 7 of the separation membrane unit 30. The feed water is membrane-separated by a reverse osmosis membrane module 8 and each generated water flows out to a permeated water outlet 10 and a concentrated water outlet 11. By the structure, the maintenance is facilitated, the preservation space is decreased and the fresh water is rapidly generated.

公开(公告)号：JPH10277539A

公开(公告)日：1998-10-20

申请号：JP9209997

申请日：1997-04-10

Applicant: TORAY INDUSTRIES

Inventor： IMAI KAZUO ,  SHIYAMA TAKUROU

IPC: B01D63/02 ,  B01D65/02 ,  C02F1/28 ,  C02F1/44

Abstract: PROBLEM TO BE SOLVED: To improve the back washing efficiency and shorten the back washing time by connecting a plurality of water purifiers in parallel, each of which is provided with a cartridge filled with activated carbon mixture having two of more peaks in particle size distribution curve in the front stage and a cartridge filled with hollow fiber membranes in the rear stage. SOLUTION: This water purifying apparatus comprises two water purifiers 8, 9 arranged in parallel, a raw water supply line 10, a filtered water taking out line 20, and a back washing water discharging line 29 and the respective water purifiers 8, 9 are filled with filtration materials 8a, 8a'; 9a, 9a', respectively. As the filtration materials 8a, 9a, activated carbon having two or more peaks in a particle size distribution (the ratio of the particle sizes at two peaks are from (1:8) to (1:2)] is used and as the materials 8a', 9a', a large number of hollow fiber membranes made of a translucent film are used. Three-way valves 21, 22 as line switching means to switch the raw water supply line 10 and the back washing water discharging line 29 are installed in the respective water purifiers 8, 9 and the respective water purifiers 8, 9 are so operated as to reciprocally carry out purifying process and back washing process.

公开(公告)号：JPH10192668A

公开(公告)日：1998-07-28

申请号：JP28340597

申请日：1997-10-16

Applicant: TORAY INDUSTRIES

Inventor： IMAI KAZUO ,  SHIYAMA TAKUROU ,  TOYODA MASAO

IPC: B01D65/02 ,  C02F1/28 ,  C02F1/44

Abstract: PROBLEM TO BE SOLVED: To effectively wash a separation membrane and a water purifying element which are used in a water purifier, etc., by repeating a backwashing and non-backwashing cycle. SOLUTION: A filtration process and a backward washing process are repeated alternately. The filtration process and the backward washing process are changed over by three-way valves 21, 22 and a two-way valve 23. First, when two water purifiers 8, 9 are operated for filtration, the three way valves 21, 22 are opened to the (a) side, and the two-way valve 23 is opened. In this way, supplied raw water is filtered during the passage from raw water supply areas 8b, 9b to filter mediums 8a, 8a', 9a, 9b' of the water purifiers 8, 9 to be taken out from filtrate take-out areas 8c, 9c. Besides, in the backward washing of the water purifier 8, the three-way valve 22 is opened to the (a) side, the three-way valve 21 is opened to the (b) side, and the two-way valve 23 is closed and a purified water take-out line 20 closed by the valve 23 is used as a backward washing supply line. Therefore, raw water is supplied only to the water purifier 9, the filtrate obtained by the water purifier 9 is supplied to the area 8c as backward washing water.

公开(公告)号：JPH10151445A

公开(公告)日：1998-06-09

申请号：JP14382497

申请日：1997-06-02

Applicant: TORAY INDUSTRIES

Inventor： IMAI KAZUO ,  SHIYAMA TAKUROU ,  TOYODA MASAO

IPC: B01D65/02 ,  C02F1/28 ,  C02F1/44

Abstract: PROBLEM TO BE SOLVED: To eliminate compressed air and filtrate supply means by backwashing a water purifier in which a channel closing part is set freely attachably/ detachably so that in a connector in which openings for fluid are formed at both ends from a pair of connectors which connected cartridges in parallel, a joint between different kinds of cartridges is divided. SOLUTION: A cartridge 30 the front part of which is filled with active carbon and a cartridge 31 the rear part of which is loaded with hollow fiber membranes are connected parallely by a pair of connectors 32, 33. Openings 37, 38 for fluid are formed at both ends of the connector 32. A channel closing member 39 which closes a channel between different kinds of cartridges 30, 31 is set freely attachably/detachably in the connector 32. Although the cartridges 30, 31 are connected in parallel, they are connected in series by the member 39. Since active carbon is backwashed with washing water which was used for backwashing the membranes, defects which occur when compressed air and a pressure pump are used can be eliminated.