The present invention relates to a spiral-wound filter module exhibiting almost no heavy metal leaching and a manufacturing method thereof, and specifically, to a spiral-wound filter module, which can be used as a filter for producing safe drinking water by substantially reducing the amount of a heavy metal leached when immersed in water, and a manufacturing method thereof.

According to the present invention, even when a high recovery ratio operation is performed, the influence of concentration of ingredients to be separated in the feed fluid can be reduced, the concentration polarization can be prevented by increasing the turbulence effect on the membrane surface, and the fluid permeation performance and the separation performance of the separation membrane element can be maintained.

Embodiments of the present invention provide elements that are beneficial for use in fluid filtration. Embodiments provide elements that have variable feed spacer height, variable permeate spacer height, or both. The variable height allows flow properties to be matched to fluid volume as the filtration occurs.

Disclosed is a central tube set. The central tube set includes: a permeate tube, a peripheral wall of the permeate tube being arranged with a pure water influx hole communicating with an internal channel of the permeate tube; and a plurality of wastewater tubes arranged at intervals. The wastewater tubes are arranged around the permeate tube, a peripheral wall of each wastewater tube is arranged with a wastewater influx hole communicating with an internal channel of each wastewater tube. The plurality of the wastewater tubes and the permeate tube are arranged at intervals, to form a receiving space between each wastewater tube and the permeate tube, for receiving a portion of the reverse osmosis membrane sheet set which is extending into the central tube set. The present application further provides a spiral wound reverse osmosis membrane component and a reverse osmosis water purifier.

Disclosed is a high-penetration two-component polyurethane adhesive for separation apparatus, such as thin film composite reverse osmosis filtration membranes. The polyisocyanate reactive side of the two-component adhesive comprises hydrogenated castor oil or derivative thereof to increase the viscosity and provide a thixotropic property. Surprisingly, these high-viscosity polyisocyanate reactive components provide a two-component polyurethane adhesive exhibiting excellent penetration of the membranes used in such separation apparatus. Also disclosed is a method of using these two component polyurethane adhesives to bond these membranes to one or more other components of a separation apparatus.

An apparatus utilizes a membrane unit to capture components from atmospheric air, including oxygen and carbon dioxide, resulting in a permeate stream having an enriched concentration of oxygen and carbon dioxide. Alternatively, the membrane unit may be utilized to form a permeate stream having a permeate of enriched fast gas components. The permeate stream is thereafter directed to a permeate processing facility which may include a second stage of permeate enrichment, a flue gas generator, or a carbon dioxide sequestration facility for processing of an enriched stream of carbon dioxide. Among other carbon dioxide sequestration facilities, the carbon dioxide may be biologically sequestered by a facility of photosynthetic organisms, such as trees in an orchard, crops, or the like. The membrane unit may be shell-less and utilize a vacuum or positive pressure to facilitate the flow of fast gas components through a selective barrier of the membrane.

Provided are a porous outflow pipe and an osmosis module comprising same. A porous outflow pipe for forward osmosis or pressure-retarded osmosis, according to one embodiment of the present invention, comprises: a hollow pipe provided with a plurality of first through-holes and second through-holes in the lengthwise direction through which a fluid flows in and out; a bypass pipe arranged concentrically inside the hollow pipe in the lengthwise direction; and a partitioning plate formed along the circumference of the bypass pipe, for preventing mixing of a fluid introduced through the front end side of the hollow pipe and a fluid introduced through the second through-holes.

A spiral-wound membrane structure includes a central pipe and a film roll. The central pipe comprises a filter body and end covers separately connected to two ends of the filter body. A passage is formed in the center of the filter body, and two ends of the filter body are embedded in the end covers to be bonded on and sealed by the end covers. The film roll includes a guide cloth, a membrane and a mesh. The film roll is wound on the central pipe. The central pipe is directly made of a filter material, can be used as a pre-filter or post-filter, and can be matched with the film roll in the spiral-wound membrane structure to form a highly-integrated two-in-one composite filter. The composite filter can be mounted on a water purifier.

The present invention relates to a gas separation membrane including: a supporting membrane; and a separation functional layer which is provided on the supporting membrane and includes a crosslinked polyamide obtained by polycondensation of a polyfunctional amine and a polyfunctional acid halide, in which, in the crosslinked polyamide, the number A of terminal amino groups, the number B of terminal carboxy groups, and the number C of amide groups satisfy (A+B)/C≤0.66.

Provided is a spiral membrane module which is suitable for being set up in the vertical direction since at one end of its pressure vessel, the supply of feed liquid and the discharge of concentrated liquid can be attained.