公开(公告)号：US07081194B2

公开(公告)日：2006-07-25

申请号：US10783488

申请日：2004-02-19

申请人： Kimio Sakai ,  Seigo Ichikawa ,  Akihisa Kikuya

发明人： Kimio Sakai ,  Seigo Ichikawa ,  Akihisa Kikuya

IPC分类号： C02F1/461

CPC分类号： G21F9/10 ,  C02F1/001 ,  C02F1/4672 ,  C02F1/66 ,  C02F9/00 ,  C02F2001/46138 ,  C02F2101/30 ,  C02F2201/4617 ,  C02F2209/08 ,  G21F9/06

摘要： ETA-containing wastewater discarded from a regenerator of a nuclear power plant with a pressurized water reactor is neutralized with sodium hydroxide to adjust the pH value, metals are precipitated and separated, the wastewater is thereafter supplied to a filtration apparatus and filtered, and then supplied to an electrolyzer to conduct electrolysis and reduce the COD value induced by ETA to below the environmental discharge limit standard value.

摘要翻译： 用氢氧化钠中和具有加压水反应器的核动力装置再生器废弃的含有ETA的废水以调节pH值，金属沉淀分离，然后将废水供给到过滤装置并过滤，然后供给 到电解槽进行电解，并将由ETA引起的COD值降低到环境排放极限标准值以下。

公开(公告)号：US5832393A

公开(公告)日：1998-11-03

申请号：US766025

申请日：1996-12-13

申请人： Kazuo Omata ,  Katsumi Shibata ,  Yukio Shirai ,  Seigo Ichikawa

发明人： Kazuo Omata ,  Katsumi Shibata ,  Yukio Shirai ,  Seigo Ichikawa

IPC分类号： G21F9/00 ,  G21F9/06

CPC分类号： G21F9/06 ,  G21F9/002

摘要： Although a chelating agent solution having radioactive contaminants is solidified by mixing with cement and then stored, a vast storage place is required for storing an enormous amount of chelating agent solution. When such a chelating agent solution is treated with an ion-exchange resin, a large amount of ion-exchange resin is required, and a large amount of ion-exchange resin having radioactive contaminants is produced. The present invention thus provides a method of treating a chelating agent solution having radioactive contaminants, which can significantly decrease the amount of the chelating agent solution having radioactive contaminants, and which, when an ion-exchange resin is used, can significantly decrease the load on the ion-exchange resin without producing a large amount of ion-exchange resin having radioactive contaminants. In this method, a chelating agent solution having radioactive contaminants is electrolyzed by a direct current to produce various gases and eliminate the chelating property, a holding agent such as a coagulant-precipitant or a metal scavenger, which holds metal ions to form a water-insoluble substance, is then added to the chelating agent solution to form an insoluble substance which is then filtered off, and the filtrate is treated with an ion-exchange resin. The produced purified water may be collected, or a chelating agent may be added to the purified water to form a chelating agent solution used for decontaminating a radioactive contaminated substance.

摘要翻译： 虽然具有放射性污染物的螯合剂溶液通过与水泥混合而固化然后储存，但是需要大量的储存空间来储存大量的螯合剂溶液。 当用离子交换树脂处理这种螯合剂溶液时，需要大量的离子交换树脂，并且产生大量具有放射性污染物的离子交换树脂。 因此，本发明提供了一种处理具有放射性污染物的螯合剂溶液的方法，其可以显着减少具有放射性污染物的螯合剂溶液的量，并且当使用离子交换树脂时，可以显着降低负载 该离子交换树脂不产生大量具有放射性污染物的离子交换树脂。 在该方法中，具有放射性污染物的螯合剂溶液通过直流电解以产生各种气体并消除螯合性质，保持金属离子形成水溶性沉淀剂或金属清除剂的保持剂，例如凝结剂沉淀剂或金属清除剂， 然后将其加入到螯合剂溶液中以形成不溶物质，然后将其滤出，滤液用离子交换树脂处理。 可以收集生成的纯化水，或者可以将纯化水中加入螯合剂，形成用于对放射性污染物质进行净化的螯合剂溶液。

公开(公告)号：US5666984A

公开(公告)日：1997-09-16

申请号：US635683

申请日：1996-04-22

申请人： Kenji Horikawa ,  Hiroshi Obinata ,  Kazuo Omata ,  Toshihiko Sato ,  Yoshihiko Nakajima ,  Seigo Ichikawa

发明人： Kenji Horikawa ,  Hiroshi Obinata ,  Kazuo Omata ,  Toshihiko Sato ,  Yoshihiko Nakajima ,  Seigo Ichikawa

IPC分类号： G21F9/28 ,  G21F9/00 ,  B08B3/06

CPC分类号： G21F9/001

摘要： A method and apparatus for decontaminating a substance contaminated with radioactivity, in particular, shot blasting grit contaminating with radioactivity. The method comprises: contaminated substance washing the substance to be decontaminated with chelate liquid; draining the chelate liquid; raising the temperature of the substance to a level not lower than the boiling point of a solvent by means of hot air; supplying the solvent to the substance and rapid by vaporizing the solvent; removing the remaining chelate fluid liquid by the force of the vaporization and draining and drying the substance. The apparatus comprises: a decontamination vessel rotatable in a main vessel which has a spray device, the decontamination vessel having a multitude of pores in its outer periphery; a solvent supply device communicating with the spray device and a solvent filtering device communicating with the main vessel, provided in a way to allow circulation of liquid; a purifying device for obtaining a rinse solvent; a chelate liquid supply device in communication with the spray device; a chelate liquid filtering device connected with the main vessel and communicating with the chelate supply device; an electrolytic processing device for regenerating the chelate liquid and communicating with the chelate liquid supply device; and a hot air supply device communicating with the main vessel.

摘要翻译： 用于对被放射性污染的物质进行净化的方法和装置，特别是用放射性污染的喷丸。 该方法包括：用螯合液清洗要去污的物质的污染物; 排出螯合液; 通过热风将物质的温度提高到不低于溶剂沸点的水平; 将溶剂供给到物质中并通过汽化汽化而快速; 通过蒸发的作用除去剩余的螯合液体，排出和干燥物质。 该装置包括：在主容器中可旋转的具有喷射装置的净化容器，该净化容器在其外周具有多个孔; 与喷雾装置连通的溶剂供给装置和与主容器连通的溶剂过滤装置，以允许液体循环的方式设置; 用于获得漂洗溶剂的净化装置; 与喷雾装置连通的螯合液体供给装置; 与主容器连接并与螯合供给装置连通的螯合液体过滤装置; 用于再生螯合液体并与螯合液体供应装置连通的电解处理装置; 以及与主容器连通的热空气供给装置。

公开(公告)号：US5570468A

公开(公告)日：1996-10-29

申请号：US412310

申请日：1995-03-29

申请人： Kenji Morikawa ,  Hiroshi Obinata ,  Kazuo Omata ,  Toshihiko Sato ,  Yoshihiko Nakajima ,  Seigo Ichikawa

发明人： Kenji Morikawa ,  Hiroshi Obinata ,  Kazuo Omata ,  Toshihiko Sato ,  Yoshihiko Nakajima ,  Seigo Ichikawa

IPC分类号： G21F9/28 ,  G21F9/00

CPC分类号： G21F9/001

摘要： A method of effectively decontaminating a substance contaminated with radioactivity, in particular, shot blasting grit contaminated with radioactivity, and a decontaminating apparatus which makes it possible for a single apparatus to perform all of the decontamination processes without moving the contaminated substance from one apparatus to another for each process, thereby realizing reduction in the installation space and achieving an improvement in operational efficiency. The method comprises: decontaminating a contaminated substance by washing it with achelate liquid; draining the chelate liquid; raising the temperature of the substance to a level not lower than the boiling point of a solvent by means of hot air; supplying the solvent to the substance to result in rapid vaporization thereof; removing the remaining chelate fluid liquid by the force of this vaporization and draining the same;and drying the substance.

摘要翻译： 一种有效地净化放射性污染物质，特别是被放射性污染的喷砂砂粒的方法，以及一种净化设备，使单个设备能够执行所有的净化过程，而不会将污染物质从一个设备移动到另一个设备 对于每个处理，从而实现安装空间的减小并且实现操作效率的提高。 该方法包括：用achelate液体清洗污染物质; 排出螯合液; 通过热风将物质的温度提高到不低于溶剂沸点的水平; 将溶剂供给到物质以导致其迅速蒸发; 通过该蒸发的作用除去剩余的螯合液体液体并将其排出;并干燥该物质。

公开(公告)号：US20060118429A1

公开(公告)日：2006-06-08

申请号：US10783488

申请日：2004-02-19

申请人： Kimio Sakai ,  Seigo Ichikawa ,  Akihisa Kikuya

发明人： Kimio Sakai ,  Seigo Ichikawa ,  Akihisa Kikuya

IPC分类号： C02F1/461

CPC分类号： G21F9/10 ,  C02F1/001 ,  C02F1/4672 ,  C02F1/66 ,  C02F9/00 ,  C02F2001/46138 ,  C02F2101/30 ,  C02F2201/4617 ,  C02F2209/08 ,  G21F9/06

摘要： ETA-containing wastewater discarded from a regenerator of a nuclear power plant with a pressurized water reactor is neutralized with sodium hydroxide to adjust the pH value, metals are precipitated and separated, the wastewater is thereafter supplied to a filtration apparatus and filtered, and then supplied to an electrolyzer to conduct electrolysis and reduce the COD value induced by ETA to below the environmental discharge limit standard value.

摘要翻译： 用氢氧化钠中和具有加压水反应器的核动力装置再生器废弃的含有ETA的废水以调节pH值，金属沉淀分离，然后将废水供给到过滤装置并过滤，然后供给 到电解槽进行电解，并将由ETA引起的COD值降低到环境排放极限标准值以下。

公开(公告)号：US5613239A

公开(公告)日：1997-03-18

申请号：US575045

申请日：1995-12-19

申请人： Hiroshi Obinata ,  Seigo Ichikawa ,  Akihisa Kikuya

发明人： Hiroshi Obinata ,  Seigo Ichikawa ,  Akihisa Kikuya

IPC分类号： B01D61/02 ,  B01D61/04 ,  C02F1/32 ,  C02F1/42 ,  C02F1/44 ,  C02F1/46 ,  C02F1/461 ,  C02F9/00 ,  G21F9/06 ,  G21F9/00

CPC分类号： C02F1/441 ,  B01D61/025 ,  B01D61/04 ,  G21F9/06 ,  B01D2311/04 ,  C02F2101/006

摘要： A solution composed of a chelating solution and/or an organic acid is applied to radioactive metals to form a radioactive metal solution. The metal solution is increased in its electrical conductivity by addition of an alkaline agent, followed by electrolysis by an electrolyzer to thereby convert metal ions in the metal solution to hydroxides of low solubility and to separate the hydroxides as a filter cake by subsequent filtration. The filtrate is irradiated with ultraviolet rays for further decomposition of remaining organic matter and then filtered by a device using reverse osmosis. The resultant filtrate is recycled as clean water for use for a chelating solution and electrolytic solution, or is discharged. The metal ions precipitated by treatment with the alkaline agent prior to electrolysis as matter of low solubility is separated from the filtrate which is thereafter electrolyzed.

摘要翻译： 将由螯合溶液和/或有机酸组成的溶液施加到放射性金属上以形成放射性金属溶液。 金属溶液的电导率通​​过添加碱性试剂而增加，随后通过电解槽进行电解，从而将金属溶液中的金属离子转化为低溶解度的氢氧化物，并通过随后的过滤将氢氧化物分离成滤饼。 用紫外线照射滤液，进一步分解剩余的有机物，然后用反渗透装置过滤。 所得滤液作为清水再循环，用于螯合溶液和电解液，或排出。 在电解之前用碱性试剂处理沉淀出的金属离子作为低溶解度的问题与滤液分离，随后进行电解。