The invention relates to a method of determining a permeation property of hollow-fibre membranes wherein the permeation property of the hollow-fibre membrane is determined on a hollow-fibre membrane bundle which has been introduced into a housing and has terminally open hollow-fibre membranes at a first end of the hollow-fibre membrane bundle and terminally closed hollow-fibre membranes at a second end of the hollow-fibre membrane bundle. The invention more particularly relates to a method of determining the ultrafiltration rate and/or the ultrafiltration coefficient of hollow-fibre membranes.

A process for producing nitrogen-rich air by feeding high temperature air at 150 C. or more to an air separation membrane module is described. After being placed at 175 C. for two hours, the air separation module exhibits a shape-retention ratio of 95% or more in one embodiment. The nitrogen-rich air can be fed to a fuel tank for an aircraft, for example.

A spiral wound membrane module adapted for hyperfiltration and including at least one membrane envelope and feed spacer sheet wound about a central permeate tube to form an inlet and outlet scroll face and an outer periphery, wherein the feed spacer sheet includes: i) a feed entrance section extending along the permeate collection tube from the inlet scroll face toward the outlet scroll face, ii) a feed exit section extending along the outer periphery from the outlet scroll face toward the inlet scroll face, and iii) a central feed section located between the feed entrance section and the feed exit section; and wherein the feed entrance section has a median resistance to flow in a direction parallel to the permeate collection tube that is less than 25% of the median resistance to flow of the central feed section in a direction perpendicular to the permeate collection tube.

A process for producing nitrogen-rich air by feeding high temperature air at 150 C. or more to an air separation membrane module is described. After being placed at 175 C. for two hours, the air separation module exhibits a shape-retention ratio of 95% or more in one embodiment. The nitrogen-rich air can be fed to a fuel tank for an aircraft, for example.

A spiral wound membrane element and a method for cleaning a spiral wound membrane sheet are provided. The spiral wound membrane element comprising a perforated central tube; one or more membrane sleeves, each sleeve comprising two membrane sheets enclosed at two edges around a feed spacer sheet and wrapped around the central tube; a permeate carrier sheet attached to the central tube at a first edge opposite a second edge; and a seal on third and fourth edges of the permeate carrier sheet. The method comprises introducing two solution with different solute concentration to two sides of the spiral wound membrane sheet; establishing a concentration gradient between the first and second sides; communicating a first solvent from the first side to the second side to remove a foulant located on the second side of the membrane sheet; and collecting a waste stream that contains the foulant.

An end cap of a dialyzer and a fabricating method thereof, and a dialyzer are provided. The end cap includes a main body and a sealing element. The main body has a blood port. The sealing element is integrally connected on an inner wall of the main body.

A fluid conditioning unit is provided that includes a housing, a cap, a cartridge device, and a filter cartridge. The cap is threadably secured to and unsecured from the housing by rotation about an axis of the housing. The cap forms a removable seal with the housing when secured thereto. The cartridge device is secured to the cap in a manner that restricts movement of the cartridge device with respect to the cap along the axis but allows rotation of the cartridge device with respect to the cap about the axis. The filter cartridge is removably secured to the cartridge device and is disposed in the housing along the axis.

A ceramic membrane filtration assembly includes a housing and a membrane assembly. The membrane assembly includes at least one membrane with channels therein. A first inner end cap device is disposed within the housing and is coupled with the membrane assembly. The housing has a bypass near an outer perimeter of the first inner end cap device, the first inner end cap device has an inner port, the inner port fluidly coupled with the channels of the membrane, where the bypass includes a space between the housing and the first inner end cap device. A first outer end cap device is coupled with the first inner end cap device; the first outer end cap device has a first port and a second port, where the first port is fluidly separate from the second port, and the first port is fluidly coupled with the inner port.

A stack plate of a stack plate device of a humidifier includes inlay parts extending along two opposing front or longitudinal ends of the stack plate, a semipermeable layer disposed on and being stabilized by the inlay parts, and a frame disposed on multiple portions of the semipermeable layer that are disposed on the inlay parts, the frame circumferentially enclosing a through-opening in the stack plate. A remaining portion of the semipermeable layer completely covers the through-opening. An outer circumferential section of the semipermeable layer and the inlay parts are overmolded by the frame. Opposing front ends of the frame define inflow and outflow regions, respectively, on a first side of the frame for a second fluid, and opposing longitudinal ends of the frame define inflow and outflow regions, respectively, on a second side of the frame for a first fluid.

The present utility model discloses a water purifier filter cartridge of simple structure, comprising a filter cartridge cylinder, wherein a central tube coaxial with the filter cartridge cylinder is disposed in the filter cartridge cylinder; a first cavity is formed in the central tube; a filter cartridge body is disposed outside the central tube; the filter cartridge body comprises an RO membrane and a pre-filtering membrane; the RO membrane is wound around the central tube; several water holes communicating the first cavity with the RO membrane are formed in the side wall of the central tube; the pre-filtering membrane is wound outside the RO membrane; a second cavity is formed between the pre-filtering membrane and the filter cartridge cylinder; a first water gap, a second water gap and a third water gap are formed in the top of the filter cartridge cylinder; the first water gap communicates with the first cavity; and the second water gap communicates with the second cavity. According to the water purifier filter cartridge of simple structure of the present utility model, the filter cartridge structure is simplified, the cost is lowered, connection of a water path of the filter cartridge in a water purifier is more convenient, mounting errors and omissions are reduced, the assembling efficiency is improved, and the structure of the water purifier filter cartridge is further improved.