Washing device for porous hollow fiber membranes, and porous hollow fiber membrane production method

A technology of cleaning device and manufacturing method, applied in fiber processing, chemical instruments and methods, rayon cleaning/drying, etc., can solve the problem of concentration drop, etc., to prevent re-adhesion, reduce the concentration of residual substances, and restrain the usage amount. Effect
CN103459004AActive Publication Date: 2013-12-18MITSUBISHI CHEM CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MITSUBISHI CHEM CORP
Publication Date
2013-12-18

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Abstract

The invention relates to a device for washing porous hollow fiber membranes. The device comprises: n washing tanks (provided that n is an integer of 2 or more) holding a washing solution through which the porous hollow fiber membrane passes sequentially; and one or more pressure-applying units that pressurize or de-pressurize the washing solution on the outer side of the porous hollow fiber membrane immersed in the washing solution to force the washing solution to pass through the membrane part of the porous hollow fiber membrane. The pressure-applying unit is accommodated in any one or more of the washing tanks subsequent to the first tank and up through the (n-1) tank. The invention provides: a method for producing porous hollow fiber membranes, which can reduce the concentration of residual substances in the water retained by the membrane and prevent the re-adhesion of hydrophilic polymer while limiting the amount of washing solution used; and the washing device for porous hollow fiber membranes, which is suitably used in the production method.
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Description

technical field

[0001] The present invention relates to a cleaning device for a porous hollow fiber membrane and a method for manufacturing the porous hollow fiber membrane.

[0002] This application claims priority based on Japanese Patent Application No. 2011-24028 for which it applied in Japan on February 7, 2011, and uses the content here. Background technique

[0003] For the concentration, recovery, removal or distillation of useful components in the food industry, medical or electronic industries, etc., precision filtration membranes, superfiltration membranes, or reverse osmosis filtration membranes are often made of acetate cellulose, polyester A porous hollow fiber membrane having a hollow porous layer made of acrylonitrile, polysulfone, or fluorine-based resin, for example, produced by wet or dry-wet spinning.

[0004] When producing a porous hollow fiber membrane by wet or dry-wet spinning, first, a membrane-forming stock solution in which a hydrophobic polymer ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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