Water purification cartridge, water purifier and method for cleaning water purifier
First Claim
1. A water purification cartridge comprising:
- a hollow fiber membrane element comprising a plurality of hollow fiber membranes bent in a U-shape and a potting material for binding both ends of the hollow fiber membranes so as to maintain the open states of the hollow fiber membranes; and
a cylindrical hollow fiber membrane case for covering the hollow fiber membranes, wherein the hollow fiber membrane element is detachably installed in the hollow fiber membrane case so that a fluid-tight state is maintained between the primary side and the secondary side of the hollow fiber membranes.
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Abstract
An object of the present invention is to provide a water purification cartridge in which the decreased function of the hollow fiber membranes is restored by cleaning and of which the operating cost of a purification treatment of raw water decreases. The present invention provides a water purification cartridge comprising a hollow fiber membrane element comprising a plurality of hollow fiber membranes bent in a U-shape and a potting material for binding both ends of the hollow fiber membranes so as to maintain the open states of the hollow fiber membranes and a cylindrical hollow fiber membrane case for covering the hollow fiber membranes, wherein the hollow fiber membrane element is detachably installed in the hollow fiber membrane case so that a fluid-tight state is maintained between the primary side and the secondary side of the hollow fiber membranes.
63 Citations
27 Claims
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1. A water purification cartridge comprising:
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a hollow fiber membrane element comprising a plurality of hollow fiber membranes bent in a U-shape and a potting material for binding both ends of the hollow fiber membranes so as to maintain the open states of the hollow fiber membranes; and
a cylindrical hollow fiber membrane case for covering the hollow fiber membranes, wherein the hollow fiber membrane element is detachably installed in the hollow fiber membrane case so that a fluid-tight state is maintained between the primary side and the secondary side of the hollow fiber membranes. - View Dependent Claims (2, 3, 4, 5)
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6. A water purifier comprising:
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a hollow fiber membrane module in which the ends of the hollow fiber membranes are fixed to one end of a cylindrical vessel while the ends of the hollow fiber membranes are maintained in open states, wherein the hollow fiber membrane module has a hollow fiber membrane filling percentage in a range from 20 to 60%, and wherein the cylindrical vessel comprises a cleaning solvent inlet and a cleaning solvent outlet for cleaning the exterior surface of the hollow fiber membranes. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A water purifier comprising a cleaning solvent flow device for making a cleaning solvent flow on at least a part of the exterior surface of hollow fiber membranes of a hollow fiber membrane module installed in a cylindrical vessel, in a circumferential direction with respect to the axis of the cylindrical vessel.
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18. A method for cleaning a water purifier which comprises a hollow fiber membrane module in which the ends of hollow fiber membranes are fixed to one end of a cylindrical vessel while the ends of the hollow fiber membranes are maintained in open states, the hollow fiber membrane module has a hollow fiber membrane filling percentage in a range from 20 to 60%, and the cylindrical vessel comprises a cleaning solvent inlet and a cleaning solvent outlet for cleaning the exterior surface of the hollow fiber membranes, the method comprising the steps of:
- supplying raw water from the cleaning solvent inlet, and after the raw water passes through the hollow fiber membranes, discharging the raw water from the cleaning solvent outlet.
- View Dependent Claims (19, 20, 24, 25, 26, 27)
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21. A method for cleaning a water purifier which comprises a hollow fiber membrane module in which the ends of hollow fiber membranes are fixed to one end of a cylindrical vessel while the ends of the hollow fiber membranes are maintained in open states, the hollow fiber membrane module has a hollow fiber membrane filling percentage in a range from 20 to 60%, and the cylindrical vessel comprises a cleaning solvent inlet and a cleaning solvent outlet for cleaning the exterior surface of the hollow fiber membranes, the method comprising the steps of:
- supplying chemical from the cleaning solvent inlet;
maintaining the conditions for a fixed time; and
discharging the chemical from the cleaning solvent outlet. - View Dependent Claims (22, 23)
- supplying chemical from the cleaning solvent inlet;
Specification