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Hyperfiltration system suitable for household use

一种超滤系统、接合点的技术，应用在超滤系统领域，能够解决积垢、长再循环时间、膜结垢等问题

Active Publication Date: 2016-05-11
DDP SPECIALTY ELECTRONICS MATERIALS US 8 LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantageously, such systems require long recirculation times in order to reduce salts and minerals to acceptably low levels
In some embodiments, recovered brine can actually contribute to membrane fouling and fouling

Method used

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  • Hyperfiltration system suitable for household use
  • Hyperfiltration system suitable for household use
  • Hyperfiltration system suitable for household use

Examples

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Effect test

Embodiment Construction

[0009] The present invention includes spiral wound modules ("elements") suitable for reverse osmosis (RO) and nanofiltration (NF). Such modules include one or more RO or NF envelopes and feed spacers wrapped around a permeate collection tube. The RO membranes used to form the envelope are relatively impermeable to almost all dissolved salts and typically block greater than about 95% of salts with monovalent ions, such as sodium chloride. RO membranes also typically block greater than about 95% of inorganic molecules as well as organic molecules with molecular weights greater than about 100 Daltons. NF membranes are more permeable than RO membranes and typically block less than about 95% of salts with monovalent ions, while blocking greater than about 50% (and often greater than 90%) of salts with divalent ions, depending on the divalent ion kind of. NF membranes also typically block particles in the nanometer range and organic molecules with molecular weights greater than ab...

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Abstract

A hyperfiltration system (10) and method for treating water including: a vessel (20) having a feed inlet (22), a permeate outlet (24), and a concentrate outlet (26); at least one spiral wound membrane element (28) located within the vessel (20); a pump (30) having a low pressure side (32) in fluid communication with a source of feed water (40) through a junction point (42) and a high pressure side (34) in fluid communication with the feed inlet (22); a permeate valve (50) connected to the permeate outlet (24) and adapted to selectively direct permeate flow between a treated water outlet (52) and the junction point (42); a flow path (60) between the concentrate outlet (26) and a discharge (62); and a flow restrictor (64) located along the flow path (60) and adapted to vary resistance to concentrate flow between a high and low value.

Description

technical field [0001] The present invention relates to ultrafiltration systems including those suitable for domestic use. Background technique [0002] Reverse osmosis (RO) membrane systems are used to treat liquids in a variety of industrial, urban and residential applications. An increasingly popular application is the treatment of feed water or "tap" water prior to consumption or use (eg in household appliances). In a typical domestic embodiment, pressurized feed water is passed through a vessel containing at least one spiral wound RO membrane element and a drinking water "permeate" and concentrate or "brine" is produced. Permeate can be collected in a permeate storage tank continuously or intermittently, making it available on demand. The concentrate is usually directed to a drain. [0003] When the system is not in use, salts and other impurities present in the feed water within the RO element slowly diffuse across the RO membrane. Therefore, when the system is res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D61/12B01D63/10B01D67/00C02F1/44
CPCB01D61/025B01D61/12B01D67/0097C02F1/441C02F1/442B01D2311/02B01D2311/06B01D2311/14B01D2311/16B01D2321/12B01D61/027B01D63/101B01D2311/2513B01D2311/04B01D2311/25C02F2307/10B01D2321/02
Inventor S·D·琼斯
Owner DDP SPECIALTY ELECTRONICS MATERIALS US 8 LLC
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