公开(公告)号：AU2011233096B2

公开(公告)日：2014-01-16

申请号：AU2011233096

申请日：2011-03-10

Applicant: TORAY INDUSTRIES

Inventor： ONISHI TAKASHI ,  IKEDA KEIICHI ,  OKUBO KENICHI

IPC: B01D65/02 ,  C02F1/28 ,  C02F1/44 ,  C02F1/52

Abstract: Disclosed is a method—for cleaning a separation membrane module after raw water containing particles that have a higher hardness than the separation membrane are percolated using the separation membrane—wherein, with the aims of efficiently decreasing abrasion of the outer membrane surface resulting from the high-hardness particles during air washing, suppressing cake filtration resistance deriving from high-hardness particles on the membrane surface when the membrane continues to be used in a percolation step, and enabling stable operation at a low membrane percolation pressure differential, after ending percolation, after water on the primary side of the membrane within the separation membrane module is discharged out of the system, back-pressure cleaning is conducted, during which the back-pressure cleaning wastewater within the separation membrane module is discharged, and then one of the belowmentioned steps is conducted, after which the water on the primary side of the membrane in the separation membrane module is discharged out of the system: (a) a step wherein the primary side of the membrane in the separation membrane module is filled with water and air washing is performed; (b) a step wherein air washing is performed while supplying water to the primary side of the membrane within the separation membrane module.

公开(公告)号：CA2840475A1

公开(公告)日：2013-01-03

申请号：CA2840475

申请日：2012-05-09

Applicant: TORAY INDUSTRIES

Inventor： IKEDA KEIICHI

IPC: B01D65/06 ,  B01D65/02 ,  C02F1/44 ,  C02F1/52

Abstract: A washing method for a separation membrane module which filters raw water containing particles having higher hardness than a separation membrane through the separation membrane after mixing and stirring the raw water with an inorganic flocculant, wherein in order to efficiently reduce abrasion of the surface of the membrane due to the high-hardness particles during air washing and suppress cake filtration resistance resulting from a flocculated flock containing the high-hardness particles on the surface of the membrane when the separation film module continued to be subjected to a filtration step to thereby enable a safe operation at low membrane filtration differential pressure over a long period, (a) water on the first primary side of the membrane within the separation membrane module is discharged out of a system after the completion of filtration, (b) the primary side of the membrane within the separation membrane module is filled with water containing a chelating agent for a given time, (c) the water containing the chelating agent on the primary side of the membrane within the separation module is discharged out of the system, and (d) back-pressure washing wastewater within the separation membrane module is discharged while back-pressure washing in which back-pressure washing water is sent from the secondary side of the membrane to the primary side of the membrane within the separation membrane module is being performed.

公开(公告)号：CA2815972A1

公开(公告)日：2012-05-03

申请号：CA2815972

申请日：2011-09-05

Applicant: TORAY INDUSTRIES

Inventor： MORIKAWA HIROFUMI ,  IKEDA KEIICHI ,  OKUBO KENISHI

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

Abstract: In order to prevent a pressure increase during back-pressure washing of a hollow fiber membrane while suppressing a filtration resistance increase in the membrane by a simple method in a membrane filtration method by means of the hollow fiber membrane, provided is a hollow fiber membrane filtration device provided with a hollow fiber membrane module (4) which has a plurality of side surface nozzles provided with a water supply/drainage function on the side surface, and has an upper end surface nozzle provided with the water supply/drainage function on the upper end surface, and in which a hollow fiber membrane bundle consisting of a plurality of hollow fiber membranes is inserted into a cylindrical case having a lower end surface nozzle provided with the water supply/drainage function on the lower end surface, and in which the end section at least on one side of the hollow fiber membrane bundle is adhered and affixed to the cylindrical case by resin at a higher position than any of the plurality of side surface nozzles, wherein at least two of the plurality of side surface nozzles are communicated with each other through piping.

公开(公告)号：SG184107A1

公开(公告)日：2012-10-30

申请号：SG2012068797

申请日：2011-03-10

Applicant: TORAY INDUSTRIES

Inventor： ONISHI TAKASHI ,  IKEDA KEIICHI ,  OKUBO KENICHI

Abstract: The present invention has an object to provide a method for washing a separation membrane module after filtering raw water containing particles having a hardness higher than that of a separation membrane, wherein abrasion of the membrane outer surface by high hardness particles at the time of air scrubbing is efficiently reduced, and a cake layer resistance originating in high hardness particles on the membrane surface is suppressed when the membrane is successively used in a filtration step to allow stable operations at a low transmembrane pressure for a long time period. Thus, after completion of filtration, water at the primary side in a separation membrane module is drained to outside the system, backwash waste water in the separation membrane module is then drained while carrying out backwash, and any of the steps of:filling the primary side in the separation membrane module with water and carrying out air scrubbing; andcarrying out air scrubbing while feeding water to the primary side in the separation membrane moduleis then carried out, followed by draining water at the primary side in the separation membrane module to outside the system.

公开(公告)号：AU2011233096A1

公开(公告)日：2012-06-14

申请号：AU2011233096

申请日：2011-03-10

Applicant: TORAY INDUSTRIES

Inventor： ONISHI TAKASHI ,  IKEDA KEIICHI ,  OKUBO KENICHI

IPC: B01D65/02 ,  C02F1/28 ,  C02F1/44 ,  C02F1/52

Abstract: Disclosed is a method—for cleaning a separation membrane module after raw water containing particles that have a higher hardness than the separation membrane are percolated using the separation membrane—wherein, with the aims of efficiently decreasing abrasion of the outer membrane surface resulting from the high-hardness particles during air washing, suppressing cake filtration resistance deriving from high-hardness particles on the membrane surface when the membrane continues to be used in a percolation step, and enabling stable operation at a low membrane percolation pressure differential, after ending percolation, after water on the primary side of the membrane within the separation membrane module is discharged out of the system, back-pressure cleaning is conducted, during which the back-pressure cleaning wastewater within the separation membrane module is discharged, and then one of the belowmentioned steps is conducted, after which the water on the primary side of the membrane in the separation membrane module is discharged out of the system: (a) a step wherein the primary side of the membrane in the separation membrane module is filled with water and air washing is performed; (b) a step wherein air washing is performed while supplying water to the primary side of the membrane within the separation membrane module.

公开(公告)号：CA2783545A1

公开(公告)日：2011-10-06

申请号：CA2783545

申请日：2011-03-10

Applicant: TORAY INDUSTRIES

Inventor： ONISHI TAKASHI ,  IKEDA KEIICHI ,  OKUBO KENICHI

IPC: B01D65/02 ,  C02F1/28 ,  C02F1/44 ,  C02F1/52

Abstract: Disclosed is a methodfor cleaning a separation membrane module after raw water containing particles that have a higher hardness than the separation membrane are percolated using the separation membranewherein, with the aims of efficiently decreasing abrasion of the outer membrane surface resulting from the high-hardness particles during air washing, suppressing cake filtration resistance deriving from high-hardness particles on the membrane surface when the membrane continues to be used in a percolation step, and enabling stable operation at a low membrane percolation pressure differential, after ending percolation, after water on the primary side of the membrane within the separation membrane module is discharged out of the system, back-pressure cleaning is conducted, during which the back-pressure cleaning wastewater within the separation membrane module is discharged, and then one of the belowmentioned steps is conducted, after which the water on the primary side of the membrane in the separation membrane module is discharged out of the system: (a) a step wherein the primary side of the membrane in the separation membrane module is filled with water and air washing is performed; (b) a step wherein air washing is performed while supplying water to the primary side of the membrane within the separation membrane module.

公开(公告)号：BR112012013540A2

公开(公告)日：2016-06-07

申请号：BR112012013540

申请日：2011-03-10

Applicant: TORAY INDUSTRIES

Inventor： IKEDA KEIICHI ,  OKUBO KENICHI ,  ONISHI TAKASHI

IPC: B01D65/02 ,  C02F1/28 ,  C02F1/44 ,  C02F1/52

公开(公告)号：AU2011321846A1

公开(公告)日：2013-05-02

申请号：AU2011321846

申请日：2011-09-05

Applicant: TORAY INDUSTRIES

Inventor： MORIKAWA HIROFUMI ,  IKEDA KEIICHI ,  OKUBO KENICHI

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

Abstract: In order to prevent a pressure increase during back-pressure washing of a hollow fiber membrane while suppressing a filtration resistance increase in the membrane by a simple method in a membrane filtration method by means of the hollow fiber membrane, provided is a hollow fiber membrane filtration device provided with a hollow fiber membrane module (4) which has a plurality of side surface nozzles provided with a water supply/drainage function on the side surface, and has an upper end surface nozzle provided with the water supply/drainage function on the upper end surface, and in which a hollow fiber membrane bundle consisting of a plurality of hollow fiber membranes is inserted into a cylindrical case having a lower end surface nozzle provided with the water supply/drainage function on the lower end surface, and in which the end section at least on one side of the hollow fiber membrane bundle is adhered and affixed to the cylindrical case by resin at a higher position than any of the plurality of side surface nozzles, wherein at least two of the plurality of side surface nozzles are communicated with each other through piping.

公开(公告)号：EP2727645A4

公开(公告)日：2015-04-08

申请号：EP12804088

申请日：2012-05-09

Applicant: TORAY INDUSTRIES

Inventor： IKEDA KEIICHI

IPC: B01D65/06 ,  B01D65/02 ,  C02F1/44 ,  C02F1/52

CPC classification number: B01D65/02 ,  B01D2321/04 ,  B01D2321/168 ,  B01D2321/185 ,  C02F1/444 ,  C02F2303/16

公开(公告)号：EP2633898A4

公开(公告)日：2014-10-01

申请号：EP11835953

申请日：2011-09-05

Applicant: TORAY INDUSTRIES

Inventor： MORIKAWA HIROFUMI ,  IKEDA KEIICHI ,  OKUBO KENICHI

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

CPC classification number: B01D65/02 ,  B01D63/024 ,  B01D2313/12 ,  B01D2321/04 ,  B01D2321/12 ,  B01D2321/168 ,  B01D2321/18 ,  C02F1/441 ,  C02F2103/08