Provided is a fuel cell membrane humidifier for which convenience of assembly may be improved because the fuel cell membrane humidifier may be directly mounted on a structure of a transportation means such as a vehicle, a ship, or an airplane or a generator system of a building without additional equipment and manufacturing convenience may be improved because mounting requirements of various clients may be met. The fuel cell membrane humidifier includes a humidification module configured to perform moisture exchange between a first fluid and a second fluid, and including a mid-case, a second fluid inlet through which the second fluid is introduced into the mid-case, a second fluid outlet through which the second fluid is discharged to outside, and at least one cartridge located in the mid-case, caps formed on both ends of the humidification module, and a position-variable mount formed to be position-variable on the humidification module and configured to mount the humidification module on a mount target structure.

A method for closing one side of a hollow fiber membrane including a lumen and a wall radially enveloping the lumen, wherein the wall includes an inner textile layer, wherein a portion of a low viscosity resin flows at least partially through a face of the hollow fiber membrane into an end portion of the hollow fiber membrane and closes the end portion with an outer free surface and is being cured by UV light. In order to reduce a propensity for blocking between the end portions of the hollow fiber membranes it is proposed that that the portion is fed in its entirety by positive pressure through the face into the end portion and cured after a time period of 5 seconds at the most, and that the portion is arranged exclusively within the hollow fiber membrane after curing.

The present invention relates to a method of operating a membrane filtration unit including plural hollow fiber membrane modules connected to each other in parallel, the method including: a filtration step; a collection step; and a recovery step, in which a relation of n.sub.1n.sub.2>n.sub.3 is satisfied, where n.sub.1 is the number of the hollow fiber membrane modules simultaneously used in executing the filtration step, n.sub.2 is the number of the hollow fiber membrane modules simultaneously used in executing the collection step, and n.sub.3 is the number of the hollow fiber membrane modules simultaneously used in executing the recovery step.

There is provided a chemical analyzer equipped with a hollow fiber degassing module that can maintain the original excellent degassing performance even after long periods of continuous use, and can also suppress the proliferation of bacteria and the like. More specifically, a hollow fiber degassing module 20A includes a housing 210 and a hollow fiber membrane 220 disposed in an internal space S1 of the housing. The housing 210 includes a liquid supply unit 216A for connecting an outside of the housing 210 and an internal space S2 of the hollow fiber membrane 220 to each other, and for supplying constant temperature water W1 from an outside of the housing 210 to an internal space S2 of the hollow fiber membrane 220, a liquid discharge unit 217A for connecting the internal space S2 of the hollow fiber membrane 220 and the outside of the housing 210 to each other, and for discharging constant temperature water W2 degassed from the internal space S2 of the hollow fiber membrane 220 to the outside of the housing 210, and a gas discharge unit 218A for connecting an internal space S1 of the housing 210 and the outside of the housing 210 to each other, and for depressurizing the internal space S1 of the housing 210. The gas discharge unit 218A is provided at a vertically lower end portion of the housing 210.

The inline liquid-degasser (degasser) includes a gassed tube and a degassed tube with openings formed through the respective walls. The degasser also includes a baffle between the gassed tube and the degassed tube that is configured to seal an interior of the gassed tube from an interior of the degassed tube. The degasser further includes a degassing chamber surrounding an exterior of the gassed tube, where the openings of the gassed tube communicate therewith. The degasser also includes a vacuum chamber disposed adjacent to the degassing chamber and a vacuum port disposed through a wall of the vacuum chamber. The degasser further includes a plurality of hollow fibers with open ends. The hollow fibers are formed into loop portions and crown portions, where the loop portions surround the gassed tube in the degassing chamber and the crown portions extend to the vacuum chamber.