Abstract:
The electrodeionization (EDI) module of the present invention comprises at least one ion-exchange membrane delimiting at least one desalting zone (11) and at least one concentrating zone (12) situated between electrodes (13, 14), each of which is provided with ion-exchange means, and is characterized in that the ion-exchange means present in a zone are comprised of either ion-exchange resin beads (17) or at least one non-woven or woven fabric (21, 22) made of ion-exchange fibers, the resin beads and the fabrics) being both present in the EDI module.
Abstract:
An electrodeionization (EDI) module is formed an anode spaced apart from a cathode, one or more waste channels formed between the electrodes and a product channel located inward of the waste channel(s). Ion permeable membranes form the boundary between the product channel and the waste channel(s). The product channel and waste channels are filled with a mixture of anionic and cationic ion exchange materials. At least the waste channel(s) and preferably the product channel as well, use either an anion bead having a relatively low affinity for the selected anion specie(s) to be retained (e.g. Type II) or it is a blend with Type I materials. Preferably, the membranes contain an ion exchange material to speed the transfer of ions across them. More preferably, the anionic membrane contains anion materials that have a relatively low affinity for the selected specie or species for retention.
Abstract:
PROBLEM TO BE SOLVED: To provide a module for purifying a fluid, specially water. SOLUTION: This module is composed of an integrated structural vessel 30, a pretreatment means 49 known in this industry and a selectively permeable membrane-treatment cartridge known in this industry that are put in an outer cylindrical space 36 and an inner cylindrical space 35 of the vessel, respectively and are connected to each other through one or more pathways 37 nearby one axial directional edge of the vessel 30. The outer cylindrical space 36 is connected to a first connector orifice 32 1 at the same edge as an opposite axial-directional edge to feed the fluid to be purified to the above means 49 and the inner cylindrical space 35 is connected to a second connector orifice 32 2 to exhaust a flow of a permeated water(a purified fluid) from the module 15 and is connected to a third connector orifice 32 3 to exhaust the flow of a retentive liquid(a residual fluid) from the module 15, at the same edge as the above axial-directional edge, separately. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an electric deionizing method which prevents production of scales and does not require complicated pipings, valves, pump system or controlling system. SOLUTION: In an electric deionizing device, a water-based liquid which is not pure is made to pass through an ion emitting room which is divided by anion and cation permeating membranes and houses ion exchange resin beads so that the water accepts ion seeds. Then the water is made to pass through an ion concentrating room divided by anion and cation permeating membranes, while voltage is applied between the cathode room and the anode room on both sides to remove ion seeds. In this refining method of a liquid, the cathode room contains electron conductive particles (such as carbon and metal particles). The cathode room 10 consists of a cathode plate member 12, a connecting part 14 to a power supply, an ion permeating membrane 16 and a conductive material 18. The conductive material provides an increased effective cathode surface area and decreases local hydroxide density on the cathode surface.
Abstract:
An electrodeionization apparatus has a cathode compartment (32) and an anode compartment (34) for removing ions from a liquid (26) under the influence of an applied voltage, and the cathode compartment (32) includes electrically conductive particles such as metal particles and/or carbon particles.
Abstract:
The electrodeionization (EDI) module of the present invention comprises at least one ion-exchange membrane delimiting at least one desalting zone (11) and at least one concentrating zone (12) situated between electrodes (13, 14 ), each of which is provided with ion-exchange means, and is characterized in that the ion-exchange means present in a zone are comprised of either ion- exchange resin beads (17) or at least one non-woven or woven fabric (21, 22) made of ion-exchange fibers, the resin beads and the fabrics) being both present in the EDI module.
Abstract:
A system comprising a fluid treatment assembly, means for feeding the assembly with fluid to be treated and receiving treated fluid, and a structure (12) on which the assembly is adapted to be removably mounted, to interengage complementary connectors thereof with each other, is characterized in that it includes cooperating functional surfaces (25) formed on the assembly and the structure (12) so that they can enter into mutual contact to immobilize the assembly against movement in translation and keep the connectors interengaged with each other when the assembly is mounted on the structure (12) and to allow the assembly to be released in order to remove it from the structure (12) by exerting on the assembly an action limited to tilting it relative to the structure (12) and guided by the connectors interengaged with each other.
Abstract:
The module, comprising a cylindrical container (30) with fluid inlets and outlets at its first end and inner pre-treatment (49) and purification (51) elements, is made in one piece so as to be disposable. Inside it is divided by separators (38, 40) into outer (36) and inner (35) spaces, connected by at least one passage (37) near its second end. The pre-treatment and purification elements are standard, with the latter having at least one selective permeable membrane (54) separating the purified and residual fluids, and they are located in the outer and inner spaces. The outer cylindrical space is connected at the first end of the container with the fluid inlet, and the inner one is connected at the same end, with outlets for the purified fluid and residual fluid. The purification element can be in the form of a cartridge operating by reverse osmosis, nanofiltration or ultrafiltration, and comprising an outer cylinder (52) and central tube (53) with the selective membrane between them. The pre-treatment element can contain active carbon, polyphosphates and frontal filters.