Abstract: An electric deionized water production apparatus in which a direct current field is applied to a deionizing chamber packed with an ion-exchange material such that ions to be discharged are allowed to migrate in the direction identical or opposite to the direction of the water flow in the ion-exchange material, whereby ionic impurities adsorbed in the ion-exchange material are discharged from the system, the ion-exchange material being a mixture of a monolith-shaped organic porous ion-exchange material and ion-exchange resin particles. The electric deionized water production apparatus has a simple structure that can reduce material cost, process cost, and assembly cost, capable of accelerating migration of the adsorbed ionic impurities to facilitate discharge of the adsorbed ions and free from a deflected flow due to swelling or shrinkage accompanying an ion-exchanging reaction, and from poor contact with an ion-exchange membrane.

Abstract: The present invention provides an electric device for producing deionized water comprising: desalting chamber (4) defined by at least two ion-exchange membranes (1, 2) and filled with an ion exchanger; first concentration chamber (5a) positioned adjacent to one side of the desalting chamber with one of the ion-exchange membranes therebetween; second concentration chamber (5b) positioned adjacent to the other side of the desalting chamber with another of the ion-exchange membranes therebetween; and a pair of electrode chambers (6a, 6b) with one electrode chamber being disposed at the outer side of first concentration chamber (5a) and the other electrode chamber being disposed at the outer side of second concentration chamber (5b), wherein the electric device for producing deionized water is provided with: main body part (20) formed to include desalting chamber (4), concentration chambers (5a, 5b), and electrode chambers (6a, 6b); a pair of fixing plates (9a, 9b) disposed in such a way that main body part (20)

Abstract: An electrodeionization apparatus for producing deionized water comprises a deionization treatment unit including deionization chamber D and a pair of concentration chambers C1 and C2 placed adjacent to deionization chamber D on opposite sides thereof and those concentration chambers are filled with anion exchangers. The deionization chamber D is partitioned by an ion exchange membrane into first small deionization chamber D-1 adjacent to concentration chamber C1 and second small deionization chamber D-2 adjacent to concentration chamber C2. First small deionization chamber D-1 is filled with an anion exchanger. Second small deionization chamber D-2 is filled with an anion exchanger and a cation exchanger in a sequence such that the ion exchanger, through which water that is to be treated finally passes, is the anion exchanger.

Abstract: A condensate filtering device of the present invention comprises a simulation unit which is able to simulate operating conditions being the same as operating conditions of a main body of an actual condensate filtering device and sample a hollow fiber membrane easily. The condensate filtering device comprises a unit evaluating properties of a hollow fiber membrane provided with a main body of the condensate filtering device containing a first hollow fiber membrane module in which filtration of condensate and air scrubbing washing are repeated, and equipped with a column containing a second hollow fiber membrane module having a hollow fiber membrane which is the same kind as the hollow fiber membrane of the first hollow fiber membrane module; and a line introducing the condensate for unit which is a branched line from a line introducing the condensate directing to the main body of the condensate filtering device and introduces the condensate into the unit evaluating the properties of the hollow fiber membrane.

Abstract: A monolithic organic porous body includes a continuous macropore structure that includes cellular macropores that overlap to form openings having an average diameter of 20 to 200 ?m, the monolithic organic porous body having a thickness of 1 mm or more and a total pore volume of 0.5 to 5 ml/g, an area of a skeleton observed within an SEM image of a section of the continuous macropore structure (in a dry state) being 25 to 50%. A monolithic ion exchanger is produced by introducing an ion-exchange group into the monolithic organic porous body. The monolithic organic porous body and the monolithic ion exchanger are chemically stable, have high mechanical strength, and ensure a low pressure loss when fluid passes through. The monolithic organic porous body and the monolithic ion exchanger may be used as an adsorbent having a large adsorption capacity or an ion exchanger having a large ion-exchange capacity.

Abstract: A filtration and demineralization apparatus that is capable of reducing the cost of the apparatus and building cost by using an apparatus whose height is limited, and that is also capable of ensuring sufficient treatment capacity, as well as good operability, is provided. A filtration and demineralization apparatus 10 comprises a vessel 20 in a form of a body of revolution; a hollow columnar body 40 that is located in an internal space of the vessel 20, one end 40a of the columnar body being connected to an inner surface of the vessel 20 along an entire circumference of the end, and the other end 40b of the columnar body forming an opening; and a partition plate 44 that is connected to the other end 40b of the hollow columnar body along an entire circumference of the other end 40b, the partition plate being configured to separate an inside space or an outside space of the hollow columnar body 40 as an independent space in the vessel.

Abstract: An electrodeionization deionized water producing apparatus includes, between an anode chamber having an anode and a cathode chamber having a cathode, a desalination chamber in which a side near the anode is demarcated by an anion exchange membrane and a side near the cathode is demarcated by a cation exchange membrane, and a concentrating chamber in which a side near the anode is demarcated by a cation exchange membrane and a side near the cathode is demarcated by an anion exchange membrane, and the anode side of the anion exchange membrane is filled with an anion exchanger. In the electrodeionization deionized water producing apparatus, water containing free carbon dioxide is supplied to the concentrating chamber and formation of scales in the concentrating chamber during a continuous operation of a long period is inhibited.

Abstract: A method and apparatus for treating an effluent containing radioactive materials: wherein an oxidizing agent is added to an effluent containing radioactive materials, and the effluent including the oxidizing agent is filtered with a filtration film to obtain filtrated water; and the filtrated water is filtered through activated carbon; and the filtered water filtered by the activated carbon is filtered through at least one of an ion-exchanger and reverse osmosis membrane.

Abstract: By using a boric acid-resistant anion exchange resin as the anion exchange resin used in a demineralizer that purifies the primary cooling water in a pressurized-water reactor power plant, even when a boric acid-containing primary cooling water is brought into contact with the anion exchange resin disposed in the demineralizer, the generation of breaking or cracking in the anion exchange resin can be prevented.

Abstract: A unit for separating an exhaust gas containing PFC gases including CF4 and C2F6 generated in a production process, wherein the exhaust gas is concentrated in a concentration device, and then separated chromatographically in a chromatographic separation device using nitrogen as a carrier gas. The chromatographic separation device is packed with molecular sieve 13X or F-9 or the like. The unit is capable of effectively separating CF4 and C2F6.

Abstract: An apparatus and a method for separating a specified gas from a gas to be treated containing the specified gas comprising at least one ingredient, which comprises allowing the gas to be treated to flow through a column without the use of another gas for transferring the gas to be treated, while keeping the inside of the column packed with a packing material at a reduced pressure. The above apparatus and method can be suitably used for separating a specified gas having a high purity at a low cost.

Abstract: There is provided a gas separation apparatus for separating a specified gas from a gas to be treated containing a plurality of gases. The gas separation apparatus includes a plurality of serially-connected separation units that separate the specified gas from other gases by using a column, and a suction unit that controls an inside of the column to a reduced pressure. At least two of the plurality of separation units differ from each other in at least one separation condition.

Abstract: A chromatographic separator characterized in that two pumps are employed for controlling chromatographic separation that combines a first process for supplying at least one of feed solution and eluent into a circulation system and extracting the same quantity as that of liquid supplied into the circulation system from one position of a packed column where some component is enriched in the circulation system, and a second process for circulating liquid in the system without supplying the feed solution and eluent and extracting the separated component at all. Easy-to-control chromatographic separator, in which a total number of pumps to be used is decreased and high separation performance is attained through a simple structure, can thereby be provided.

Abstract: An electric deionized water production apparatus in which a direct current field is applied to a deionizing chamber packed with an ion-exchange material such that ions to be discharged are allowed to migrate in the direction identical or opposite to the direction of the water flow in the ion-exchange material, whereby ionic impurities adsorbed in the ion-exchange material are discharged from the system, the ion-exchange material being a mixture of a monolith-shaped organic porous ion-exchange material and ion-exchange resin particles. The electric deionized water production apparatus has a simple structure that can reduce material cost, process cost, and assembly cost, capable of accelerating migration of the adsorbed ionic impurities to facilitate discharge of the adsorbed ions and free from a deflected flow due to swelling or shrinkage accompanying an ion-exchanging reaction, and from poor contact with an ion-exchange membrane.

Abstract: A condensate filtering device of the present invention comprises a simulation unit which is able to simulate operating conditions being the same as operating conditions of a main body of an actual condensate filtering device and sample a hollow fiber membrane easily. The condensate filtering device comprises a unit evaluating properties of a hollow fiber membrane provided with a main body of the condensate filtering device containing a first hollow fiber membrane module in which filtration of condensate and air scrubbing washing are repeated, and equipped with a column containing a second hollow fiber membrane module having a hollow fiber membrane which is the same kind as the hollow fiber membrane of the first hollow fiber membrane module; and a line introducing the condensate for unit which is a branched line from a line introducing the condensate directing to the main body of the condensate filtering device and introduces the condensate into the unit evaluating the properties of the hollow fiber membrane.

Abstract: A porous ion exchanger includes an open cell structure including interconnected macropores and mesopores whose average diameter is in a range of 1 to 1000 ?m existing on walls of the macropores. Moreover, a total pore volume is in a range of 1 to 50 ml/g, ion exchange groups are uniformly distributed, and an ion exchange capacity is not less than 0.5 mg equivalent/g of dry porous ion exchanger. The porous ion exchanger can be used as an ion exchanger filled into a deionization module of an electrodeionization water purification device, solid acid catalyst, adsorbent, and filler for chromatography.

Abstract: A method and apparatus for treating an effluent containing radioactive materials: wherein an oxidizing agent is added to an effluent containing radioactive materials, and the effluent including the oxidizing agent is filtered with a filtration film to obtain filtrated water; and the filtrated water is filtered through activated carbon; and the filtered water filtered by the activated carbon is filtered through at least one of an ion-exchanger and reverse osmosis membrane.

Abstract: A porous ion exchanger includes an open cell structure including interconnected macropores and mesopores whose average diameter is in a range of 1 to 1000 ?m existing on walls of the macropores. Moreover, a total pore volume is in a range of 1 to 50 ml/g, ion exchange groups are uniformly distributed, and an ion exchange capacity is not less than 0.5 mg equivalent/g of dry porous ion exchanger. The porous ion exchanger can be used as an ion exchanger filled into a deionization module of an electrodeionization water purification device, solid acid catalyst, adsorbent, and filler for chromatography.

Abstract: A method for a cation-exchange resin wherein a strongly acidic cation-exchange resin is contacted with an aqueous eluting solution and the polystyrenesulfonic acid being eluted from this resin is measured, which comprises setting a plurality of molecular weight ranges in the molecular weight distribution of the polystyrenesulfonic acid eluted, and evaluating the performance capability of the cation-exchange resin based on the correspondence relationship of each molecular weight range with the amount eluted in said each molecular weight range. The evaluation method allows on-target and precise evaluation of the performance capability of a cation-exchange resin being independent of the structure of a base resin and the circumstance under which it is used, which leads to the determination of the optimum time for the exchange of a resin in a water treatment system using a cation-exchange resin, and thus to the extension of exchange of a resin and the reduction of an operation cost for the system.

Abstract: The wet treatment liquid feed nozzle of the invention comprises an introducing path having an introducing port, a discharging path having a discharging port, a crossing section formed by causing the introducing path and the discharging path to cross at the other ends thereof, a nozzle assembly having an opening section opening to an object to be treated, provided at the crossing section, and pressure control means, for controlling the difference between the pressure of the wet treatment liquid in contact with the object to be treated and the atmospheric pressure provided at least on the discharging path side so that the wet treatment liquid having been in contact with the object to be treated via the opening section does not flow to outside the discharging path.