Lg Chem, Ltd

Agency for Defense Development

Taehyeong Kim

Phill Lee

Taeyoung Park

Chong Kyu Shin

Dae Hun Kim

Kyunghoon Min

Joong Jin Han

Youngju Lee

Yoonjae Kim

Byoungsoo Lee

Hyungjoon Jeon

Hyejin Kwon

Seungpyo Jeong

Bong Ju Kwak

Se Jeong Hwang

Hyelim Kang

Kiho Kim

Changwon Shul

Jaechang Ha

Huizi Shen

Gahyeon Lee

Provided is a feed spacer for reducing differential pressure of a reverse osmosis element, the feed spacer forming the reverse osmosis element, the feed spacer comprising a plurality of strands disposed in a mesh shape having predetermined intersection points, and wherein a vertical cross section of each of the strands has a rhombic shape such that a pressure loss in the feed spacer is minimized by an effective flow of raw water at an interface of a reverse osmosis membrane, and a nozzle for forming the feed spacer.

Feed spacer for reducing differential pressure of reverse osmosis element, and formation nozzle

Provided is a feed side spacer comprising a network structure, wherein the network structure includes a hexagonal eye, the hexagonal eye includes a pair of parallel portions parallel to a flow direction of a supply liquid, and an inclined portion disposed in a diagonal direction with respect to the flow direction of the supply liquid; the parallel portion has a length of 1 mm to 5 mm; the inclined portion has a length of 5.1 mm to 10 mm; and an angle formed by sides in contact with each other of the inclined portion is from 50° to 80°, and a separation membrane element comprising same.

Feed side spacer and separation membrane element

Provided is a feed spacer having a three-layered structure, and a reverse osmosis membrane filter module including the same, where the feed spacer includes a first set of a plurality of strands that are positioned in parallel; a second set of a plurality of parallel strands provided to cross the first set; and a third set of a plurality of parallel strands positioned in parallel with a raw water flow direction, where at least one of the first set and the second set consists of strands having a smaller thickness than that of the strands constituting the third set.

Feed spacer having three-layered structure and reverse osmosis membrane filter module comprising same

The present specification provides a method for manufacturing a water-treatment separation membrane, the method comprising: preparing a porous support; forming a polyamide active layer on the porous support by using an interfacial polymerization of an aqueous solution comprising an amine compound and an organic solution comprising an acyl halide compound; and coating a coating solution comprising a random copolymer comprising the monomers represented by Chemical Formulae 1 to 3 onto the polyamide active layer, in which a content of the random copolymer is 0.5 wt % to 2 wt % based on a total weight of the coating solution, a water-treatment separation membrane manufactured by using the same, and a water treatment module comprising the water-treatment separation membrane.

Method for manufacturing water treatment separator, water treatment separator manufactured using same, and water treatment module comprising water treatment separator

The present invention relates to a water treatment membrane including a support; and a polymer layer including a copolymer containing a hydrophobic repeating unit and a hydrophilic repeating unit including an ion exchange functional group on the support, wherein the polymer layer has ion exchange capacity (IEC) of 0.02 meq/g to 2.4 meq/g, and to a water treatment module, which have excellent salt rejection and permeate flow properties.

Water-treatment separation membrane comprising ionic exchangeable polymer layer and method for forming same

Disclosed herein is a three-stage hydraulic actuator. The three-stage hydraulic actuator includes a pressurizing chamber, a distribution chamber and an acceleration chamber. The pressurizing chamber has therein separated spaces respectively charged with compressed gas and compressed oil. The distribution chamber is provided to communicate with the pressurizing chamber and is charged with oil pressurized by the compressed oil charged into the pressurizing chamber. The acceleration chamber communicates with the distribution chamber through a distributing orifice. An acceleration piston is installed in the acceleration chamber and is moved forward when the pressurized oil is supplied from the distribution chamber to the acceleration chamber.

Three-stage hydraulic actuator and method of operating the same

Growing community of inventors

Daejeon, South Korea

Taehyeong Kim