Hollow fiber membrane, method for producing hollow fiber membrane, hollow fiber membrane module, membrane separation apparatus and membrane separation method

摘要

Hollow fiber membrane of hollow fiber typeThe shrinkage rate of the inner diameter of the hollow fiber membrane after 96 hours in a predetermined membrane separation method wasIt is less than 0.1% and 9% relative to the inner diameter at the start of useA predetermined membrane separation method isHollow fiber membraneFirst and second chambers partitioned with hollow fiber membranesWith a hollow fiber membrane module havingThe first liquid is fed to the first chamber at a first pressureThe second liquid is fed into the second chamber at a second pressure lower than the first pressure.The water contained in the first liquid in the first chamber is transferred to the second liquid in the second chamber through the hollow fiber membraneThe concentrated liquid, which is concentrated from the first chamber, is concentrated.The second diluent liquid diluted from the second chamber is discharged.The outer space of the hollow fiber membrane is the first chamber.The inner space of the hollow fiber membrane is the second chamber.The first pressure isThe second pressure is constant;The pressure difference between the first and second liquids is 0 MPaHollow fiber membrane.