Title:
巻形逆浸透膜要素
Document Type and Number:
Japanese Patent JP2013509285
Kind Code:
A
Abstract:
The present invention relates to a spiral wound reverse osmosis membrane element which is formed by winding at least one set of water purification membrane module around a central treated water pipe, and each set of the water purification membrane module is formed by laminating a mesh-like treated water flow guiding member, a reverse osmosis membrane and a mesh-like feed water flow guiding member; the reverse osmosis membrane is folded at a folded side to form a feed water flow channel therein along its inner surface; a treated water flow channel is formed between outer surfaces of adjacent reverse osmosis membranes; the mesh-like feed water flow guiding member is disposed inside the feed water flow channel; the mesh-like treated water flow guiding channel is disposed inside the treated water flow channel; the treated water flow channel is opened only at a treated water outlet which opens towards the central treated water tube, and the treated water flow channel is closed and sealed at remaining three sides; the feed water flow channel is closed and sealed at areas remote from the central treated water tube at two sides adjacent to the folded side, so that the feed water flow channel forms small sections of raw water inlets respectively at areas closer to the central treated water tube at the two sides, and a concentrate outlet is formed at the feed water flow channel at a side opposite to the folded side. The improved reverse osmosis membrane element of the present invention increases the water flow velocity along the membrane surface and therefore reduces concentration polarization and slows down the speed of contamination of the spiral wound type membrane element, and thereby enhancing the durability of the membrane element.
Inventors:
How easy
Application Number:
JP2012535593A
Publication Date:
March 14, 2013
Filing Date:
May 13, 2010
Export Citation:
Assignee:
A.O.Smith (Shanghai) Water Treatment Products Company Limited
International Classes:
B01D63/10; B01D63/00; C02F1/44
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Yuriko Kudo
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Yuriko Kudo