The purpose of the present invention is to provide a highly reliable membrane module for removing hazardous components without the risk of a feed-source fluid and a concentrated fluid intermixing inside a hollow tube. The spiral wound separation membrane module is characterized in that: a spiral wound separation membrane element accommodated in a cylindrical container, the spiral wound separation membrane element having a structure in which a laminated body having a separation membrane, a feed-side spacer and a permeation-side spacer is wound around a porous hollow tube in a spiral shape, the feed-side spacer is positioned on a feed side of the separation membrane, the permeation-side spacer is positioned on a permeation side of the separation membrane, and a feed-side flow path and a permeation-side flow path are sealed so as not to communicate directly with each other.

The present invention provides a separation membrane element packed with a rugged sheet object, the separation membrane element being effective in attaining both stabilization of steps for producing the separation membrane element and an increase in fresh-water production rate. The present invention relates to a separation membrane element including: a separation membrane; and a permeate-side channel material disposed on a permeate side of the separation membrane, in which the permeate-side channel material is a porous sheet object having a recess and a protrusion on at least one face thereof, the recess being a coarsely porous region and the protrusion being a densely porous region.

A separation membrane element of the present invention includes: a separation membranes each having a feed-side face and a permeate-side face and forming a separation membrane pair by being arranged so that the permeate-side faces face each other; and a permeate-side channel material provided between the permeate-side faces of the separation membranes, the permeate-side channel material includes a sheet and a plurality of projections formed on the sheet, the sheet is a porous sheet having pores on a surface thereof, and has densely fused parts, coarsely fused parts and non-fused parts on the surface, and the projections contain a resin, and a part of the resin is impregnated into the pores of the sheet.

A filter assembly adapted for insertion into an inner chamber of a pressure vessel, wherein the assembly includes: a spiral wound membrane module (2) comprising at least one membrane envelope (4) and feed spacer sheet (6) concentrically wound about a central permeate tube (8) extending along an axis (X) forming an inlet scroll face (30) and outlet scroll face (32) and a cylindrical outer peripheral surface (38), an end cap (33) having a surface (72) covering a portion of the inlet scroll face (30) and at least one opening (76) in the end cap surface (72) near the permeate tube for permitting fluid to flow through the inlet scroll face (30) and into the feed spacer sheet (6) of the module (2), and a brine seal (65) having a radially extending flexible lip (70) defining a maximum outer diameter adapted to engage the inner chamber of the pressure vessel; wherein the brine seal is sealed to the end cap (33).

A reverse osmosis membrane filtering device includes: a water-collecting member including at least one water collecting pipe, and having a plurality of sections each of which has a plurality of water collecting apertures; at least one filter assembly disposed around the plurality of sections, the at least one filter assembly including a filter member including a reverse osmosis membrane; at least one insertion tube disposed inside the water-collecting member and defining a plurality of permeate-water channels corresponding to the plurality of sections inside the water-collecting member in cooperation with at least one seal member; and a pressure adjusting device configured to increase a pressure of at least one of the plurality of permeate-water channels to a pressure higher than that of another one of the plurality of permeate-water channels.

The present invention provides a separation membrane and a separation membrane element capable of exhibiting a good water production performance even at a high temperature and also excellent handleability and quality. The separation membrane of the present invention includes a separation membrane main body having a feed-side face and a permeate-side face; and a permeate-side channel member fixed onto the permeate-side face of the separation membrane main body, and the permeate-side channel member includes polypropylene as a main component and satisfies the following requirements (a) to (c): (a) a softening point temperature is 60? C. or higher; (b) a tensile elongation in a standard state is 10% or more; and (c) a yield point stress under a wet condition at 50? C. is 2 MPa or more.

An object of the present invention is to provide a channel material which, when introduced as a liquid separation membrane module, is capable of retaining the salt removal rate of a separation membrane even when a high pressure acts from the supply side through a reverse osmosis separation membrane, and which has a small thickness.

The channel material is a channel material for a liquid separation membrane module which includes a tricot fabric formed by knitting synthetic fibers. The tricot fabric has a convex portion formed by a double loop, and the long side length of an opening formed inside the double loop is 50 to 260 ?m. In addition, in the liquid separation membrane module, at least the reverse osmosis separation membrane and the channel material are wound around a central tube.

Embodiments of the present invention provide replacement of conventional separate feed spacer mesh with features placed, deposited or integrated on or into either the porous permeate carrier, the inactive side of the membrane sheet, or select portions of the membrane surface.

A filter assembly adapted for insertion into an inner chamber of a pressure vessel, wherein the assembly includes: a spiral wound membrane module including at least one membrane envelope and feed spacer sheet concentrically wound about a central permeate tube extending along an axis (X) forming an inlet scroll face and outlet scroll face and a cylindrical outer peripheral surface, and a brine seal disposed concentrically about a portion of the outer peripheral surface; characterized by the brine seal including: i) a radially extending flexible lip defining a maximum outer diameter adapted to engage the inner chamber of the pressure vessel, ii) an end cap surface covering a portion of the first scroll face, and iii) at least one opening in the end cap surface for permitting fluid to flow through the inlet scroll face and into the feed spacer sheet of the module.

Provided are a central tube for a filter cartridge and a filter device having same. The central tube (100) comprises a first half tube (1), a second half tube (2) and a membrane element (3), wherein the first half tube (1) has a first mating surface, and the first mating surface is grooved to form a first flow channel (111); the second half tube (2) has a second mating surface, the second mating surface is grooved to form a second flow channel (21), and the first half tube (1) and the second half tube (2) are butt-jointed to form a hollow, straight tube shape; and the membrane element (3) is arranged between the first half tube (1) and the second half tube (2) and seals the first flow channel (111) and the second flow channel (21), respectively.