JP2013226530A - Impurity adsorption method and adsorption apparatus - Google Patents

Impurity adsorption method and adsorption apparatus Download PDF

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JP2013226530A
JP2013226530A JP2012102083A JP2012102083A JP2013226530A JP 2013226530 A JP2013226530 A JP 2013226530A JP 2012102083 A JP2012102083 A JP 2012102083A JP 2012102083 A JP2012102083 A JP 2012102083A JP 2013226530 A JP2013226530 A JP 2013226530A
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adsorbent
adsorption
adsorption tower
treated liquid
case
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Tsuneo Omura
恒雄 大村
Hiroshi Okabe
寛史 岡部
Motoshige Yagyu
基茂 柳生
Akira Ikeda
昭 池田
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Toshiba Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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Abstract

PROBLEM TO BE SOLVED: To provide an impurity adsorption method capable of effectively using an adsorbent, and an adsorption apparatus.SOLUTION: An adsorbent case 7 in which an adsorbent 6 is filled is loaded in an adsorption column 1 in a multistage manner, then a to-be-treated liquid 9 is introduced to execute an adsorption treatment from a to-be-treated liquid supply port 2 provided at one end of the adsorption column 1. When the water quality of treated liquid 10 exhausted from a treated liquid outlet 3 provided at the other end of the adsorption column 1 reaches a given reference value, the adsorbent case 7 on the to-be-treated supply port 2 side is taken out of the adsorption column 1 and a new adsorbent case 7 is loaded in the adsorption column 1 from the treated liquid outlet 3 side.

Description

本発明は、下水道や食品加工工場等の一般産業における廃液処理又は原子力発電プラントや火力発電プラントにおける浄化処理に用いられる不純物吸着方法及び吸着装置に関する。   The present invention relates to an impurity adsorption method and adsorption apparatus used for waste liquid treatment in general industries such as sewers and food processing factories or purification treatment in nuclear power plants and thermal power plants.

従来、一般産業の廃液中や、原子力発電プラント又は火力発電プラントの循環水中に不純物として存在するイオンの分離回収技術として、イオン交換樹脂を用いた不純物除去方法が知られている。   2. Description of the Related Art Conventionally, an impurity removal method using an ion exchange resin is known as a technique for separating and recovering ions present as impurities in waste liquids of general industries or in circulating water of nuclear power plants or thermal power plants.

また、廃液中の特定イオンを選択的に回収する方法として、吸着剤を充填した吸着装置も知られている。このような吸着装置は、吸着剤を充填した吸着塔を直列に並べ、廃液を順番に通液し、廃液を処理するのが一般的である。その際、吸着塔を並列に並べ、片方の吸着塔のみに廃液を通液し、その吸着塔の吸着性能が劣化したら、切り替え弁等によりもう一方の吸着塔のみに廃液を通液し、その間に劣化した吸着塔を新品に交換する処理方法も知られている。   Further, as a method for selectively recovering specific ions in the waste liquid, an adsorption device filled with an adsorbent is also known. In such an adsorption device, it is common to arrange adsorption towers filled with an adsorbent in series, and sequentially pass the waste liquid to treat the waste liquid. At that time, the adsorption towers are arranged in parallel, and the waste liquid is passed through only one of the adsorption towers.If the adsorption performance of the adsorption tower deteriorates, the waste liquid is passed through only the other adsorption tower using a switching valve, etc. There is also known a processing method for replacing a deteriorated adsorption tower with a new one.

上述した従来の不純物除去装置を図７により説明する。この不純物除去装置は、第１処理槽２０と第２処理槽２５を備え、第１処理槽２０は無機層状化合物に由来する粉末状のリン吸着剤の固定床２１を形成するための第１の支持体２２を有し、この固定床２１により、被処理水３０からリン及び固形物を分離し、リン吸着剤に吸着したままの状態で利用可能なリンを回収する。第２処理槽２５は、必要に応じて未使用の新鮮なリン吸着剤が供給タンク３５から供給され、無機層状化合物に由来する粉末状のリン吸着剤の流動床又は固定床２６を形成するための第２の支持体２７を有し、第１処理槽２０で処理された処理水３１からリンを分離し、リン吸着剤に吸着したままの状態で利用可能な形態でリンを回収する。リンが回収された被処理水は第２処理槽２５の下部の排出ライン３２を通って系外に排出される。また、第２処理槽２５内でリンを吸着させたリン吸着剤は三方弁３４からリン吸着剤移送経路３３を経由して第２処理槽から前記第１処理槽へ移送される。   The conventional impurity removal apparatus described above will be described with reference to FIG. This impurity removing apparatus includes a first treatment tank 20 and a second treatment tank 25, and the first treatment tank 20 forms a first fixed bed 21 for powdered phosphorus adsorbent derived from an inorganic layered compound. The support 22 is provided, and the fixed bed 21 separates phosphorus and solids from the water to be treated 30 and collects phosphorus that can be used while adsorbed on the phosphorus adsorbent. In the second treatment tank 25, unused fresh phosphorus adsorbent is supplied from a supply tank 35 as necessary to form a fluidized bed or fixed bed 26 of powdered phosphorus adsorbent derived from an inorganic layered compound. The second support 27 is provided, phosphorus is separated from the treated water 31 treated in the first treatment tank 20, and phosphorus is recovered in a form that can be used while adsorbed to the phosphorus adsorbent. The treated water from which the phosphorus has been collected is discharged out of the system through the discharge line 32 at the bottom of the second treatment tank 25. The phosphorus adsorbent that has adsorbed phosphorus in the second treatment tank 25 is transferred from the second treatment tank to the first treatment tank through the phosphorus adsorbent transfer path 33 from the three-way valve 34.

また、第１処理槽２０及び第２処理槽２５はそれぞれ並列に２つ以上設置してもよく、第１処理槽２０又は第２処理槽２５の性能が劣化したら、劣化した処理槽と並列に設置されている別の処理槽へ通水されるようにバルブ等で流路を切り換えて運転する。これにより吸着剤は有効に使用され、被処理水中の不純物を効率的に除去することができる（特許文献１）。   Moreover, you may install two or more 1st processing tanks 20 and 2nd processing tanks 25 in parallel, respectively, and if the performance of the 1st processing tank 20 or the 2nd processing tank 25 deteriorates, it will be parallel to the deteriorated processing tank. The operation is performed by switching the flow path with a valve or the like so that the water is passed to another installed processing tank. As a result, the adsorbent is effectively used, and impurities in the water to be treated can be efficiently removed (Patent Document 1).

特許第４７０３７３７号公報Japanese Patent No. 4703737

上述した従来の不純物除去装置において、処理槽が固定床である場合は、吸着剤への不純物の吸着は吸着帯で行われる。この吸着帯の長さは処理槽の吸着剤充填高さよりも短く、吸着帯での吸着が飽和に達すると吸着帯は徐々に処理槽の出口側へ移動する。吸着帯の出口側が処理槽の出口に到達すると（いわゆる破過点）、処理槽の出口側から出てくる処理済水中の除去対象物濃度が急激に上昇し、吸着剤を新品と交換することなり、使用していた吸着剤は廃棄物となる。   In the conventional impurity removal apparatus described above, when the treatment tank is a fixed bed, the adsorption of impurities to the adsorbent is performed in the adsorption zone. The length of the adsorption zone is shorter than the adsorbent filling height of the treatment tank, and when the adsorption in the adsorption zone reaches saturation, the adsorption zone gradually moves to the outlet side of the treatment tank. When the outlet side of the adsorption zone reaches the outlet of the treatment tank (so-called breakthrough point), the concentration of the object to be removed in the treated water coming out from the outlet side of the treatment tank rises rapidly, and the adsorbent is replaced with a new one. Therefore, the adsorbent used has become waste.

しかしながら、吸着剤を交換する時点で処理槽の出口側にある吸着剤は未だ吸着能力を有しており、このような有効活用できる吸着剤も廃棄することは資源の有効利用の観点から好ましくない。   However, the adsorbent on the outlet side of the treatment tank at the time of exchanging the adsorbent still has an adsorption capacity, and it is not preferable from the viewpoint of effective use of resources to discard such an adsorbent that can be used effectively. .

本発明は、上述課題を解決するためになされたもので、吸着剤を有効に活用できる不純物吸着方法及び吸着装置を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an impurity adsorption method and an adsorption device that can effectively use an adsorbent.

上記課題を解決するために、本発明に係る不純物吸着方法は、吸着剤が充填された吸着剤ケースを吸着塔に多段に装填し、次に前記吸着塔の一方の端部に設けられた被処理液供給口から被処理液を導入して吸着処理を実施し、次に前記吸着塔の他方の端部に設けられた処理済液排出口から排出される処理済液の水質が所定の基準値に達した場合、前記被処理液供給口側の吸着剤ケースを前記吸着塔から取り出すとともに前記処理済液排出口側から新しい吸着剤ケースを前記吸着塔に装填することを特徴とする。   In order to solve the above-mentioned problems, the impurity adsorption method according to the present invention is a method in which an adsorbent case filled with an adsorbent is loaded into an adsorption tower in multiple stages, and then an object provided at one end of the adsorption tower. The liquid to be treated is introduced from the treatment liquid supply port to perform the adsorption treatment, and then the quality of the treated liquid discharged from the treated liquid discharge port provided at the other end of the adsorption tower is a predetermined standard. When the value is reached, the adsorbent case on the treated liquid supply port side is taken out from the adsorption tower and a new adsorbent case is loaded on the adsorption tower from the treated liquid discharge port side.

また、本発明に係る不純物吸着装置は、吸着剤が充填された吸着剤ケースを多段に装填した吸着塔と、前記吸着塔の両端部にそれぞれ接続された被処理液供給口と処理済液排出口と、前記被処理液供給口側の吸着塔の端部に設けられた吸着剤ケース排出用蓋と、前記処理済液排出口側の吸着塔の端部に設けられた吸着剤ケース導入用蓋と、を備えることを特徴とする。   Further, the impurity adsorption apparatus according to the present invention includes an adsorption tower in which adsorbent cases filled with an adsorbent are loaded in multiple stages, a liquid supply port to be treated connected to both ends of the adsorption tower, and a treated liquid drain. An outlet, an adsorbent case discharge lid provided at an end of the adsorption tower on the treated liquid supply port side, and an adsorbent case introduction provided at an end of the adsorption tower on the treated liquid discharge port side And a lid.

本発明によれば、破過していない吸着剤を廃棄物として排出することがないので、吸着剤を有効に活用することができる。   According to the present invention, since the adsorbent that has not passed through is not discharged as waste, the adsorbent can be used effectively.

（ａ）は吸着剤ケースが未充填の第１の実施形態に係る吸着装置の模式的断面図、（ｂ）は吸着塔を上方から見た図、（ｃ）は吸着塔を下方から見た図。(A) is a schematic cross-sectional view of the adsorption apparatus according to the first embodiment in which the adsorbent case is not filled, (b) is a view of the adsorption tower as viewed from above, and (c) is a view of the adsorption tower from below. Figure. （ａ）は第１の実施形態に係る吸着剤ケースの平面図、（ｂ）はその側面図。(A) is a top view of the adsorbent case which concerns on 1st Embodiment, (b) is the side view. 吸着剤ケースが装填された第１の実施形態に係る吸着装置の模式的断面図。The typical sectional view of the adsorption device concerning a 1st embodiment with which the adsorption agent case was loaded. （ａ）は第１の実施形態に係る吸着剤ケースの交換作業時の吸着装置の模式的断面図、（ｂ）は吸着剤ケース導入用蓋の開状態を示す図、（ｃ）は吸着剤ケース排出用蓋の開状態を示す図。(A) is typical sectional drawing of the adsorption | suction apparatus at the time of replacement | exchange operation | work of the adsorbent case based on 1st Embodiment, (b) is a figure which shows the open state of the lid | cover for adsorbent case introduction, (c) is adsorbent. The figure which shows the open state of the case discharge lid | cover. （ａ）は吸着剤ケースが未充填の第２の実施形態に係る吸着装置の模式的断面図、（ｂ）は吸着塔を上方から見た図、（ｃ）は吸着塔を下方から見た図。(A) is a schematic cross-sectional view of the adsorption device according to the second embodiment in which the adsorbent case is not filled, (b) is a view of the adsorption tower as viewed from above, and (c) is a view of the adsorption tower from below. Figure. （ａ）は第２の実施形態に係る吸着剤ケースの交換作業時の吸着装置の模式的断面図、（ｂ）は吸着剤ケース導入用蓋の開状態を示す図、（ｃ）は吸着剤ケース排出用蓋の開状態を示す図。(A) is typical sectional drawing of the adsorption | suction apparatus at the time of replacement | exchange operation | work of the adsorbent case which concerns on 2nd Embodiment, (b) is a figure which shows the open state of the lid | cover for adsorbent case introduction, (c) is adsorbent. The figure which shows the open state of the case discharge lid | cover. 従来の吸着装置の概要図。The schematic diagram of the conventional adsorption | suction apparatus.

以下、本発明に係る不純物吸着方法及び吸着装置の実施形態について図面を参照して説明する。
［第１の実施形態］
第１の実施形態に係る不純物吸着方法及び吸着装置を、図１乃至図４を参照して説明する。 Hereinafter, embodiments of an impurity adsorption method and an adsorption apparatus according to the present invention will be described with reference to the drawings.
[First Embodiment]
The impurity adsorption method and adsorption apparatus according to the first embodiment will be described with reference to FIGS.

（全体構成）
第１の実施形態に係る不純物吸着装置は、図１（ａ）〜（ｃ）に示すように、吸着塔１と、吸着塔１の一方の端面に設けられた被処理液供給口２と、他方の端面に設けられた処理済液排出口３と、被処理液供給口２側の吸着塔１の端部側面に設けられた吸着剤ケース排出用蓋４ａと、処理済液排出口３側の吸着塔１の端部側面に設けられた吸着剤ケース導入用蓋５ａと、から構成される。 (overall structure)
As shown in FIGS. 1A to 1C, the impurity adsorption apparatus according to the first embodiment includes an adsorption tower 1, a liquid supply port 2 to be treated provided on one end face of the adsorption tower 1, The treated liquid discharge port 3 provided on the other end surface, the adsorbent case discharge lid 4a provided on the side surface of the adsorption tower 1 on the treated liquid supply port 2 side, and the treated liquid discharge port 3 side And an adsorbent case introduction lid 5 a provided on the side surface of the end of the adsorption tower 1.

また、吸着塔１の周囲には吸着塔１の内部を適切な温度に制御するために加熱装置１１が設置されているが、この加熱装置１１は省略することも可能である。
なお、吸着塔１の設置方向に特に制限はなく、吸着塔１の長手方向が吸着塔１の接地面に対して垂直でも平行でもよい。 Further, a heating device 11 is installed around the adsorption tower 1 in order to control the inside of the adsorption tower 1 to an appropriate temperature, but this heating device 11 can be omitted.
In addition, there is no restriction | limiting in particular in the installation direction of the adsorption tower 1, The longitudinal direction of the adsorption tower 1 may be perpendicular | vertical or parallel with respect to the ground plane of the adsorption tower 1. FIG.

（吸着塔）
吸着塔１は、その内部に空洞８を有し、図２に示すように吸着剤６を充填した吸着剤ケース７が複数多段で装填される。吸着剤ケース導入用蓋５ａは、図１（ｂ）、（ｃ）及び図４（ａ）〜（ｃ）に示すように、高さが吸着剤ケース７の高さ略等しい半円筒状で、一端部が蝶番等で吸着塔１の端部側面に回動可能に取り付けられている。同様に、吸着剤ケース排出用蓋４ａも、高さが吸着剤ケース７の高さ略等しい半円筒状で、一端部が蝶番等で吸着塔１の端部側面に回動可能に取り付けられている。 (Adsorption tower)
The adsorption tower 1 has a cavity 8 therein, and a plurality of adsorbent cases 7 filled with the adsorbent 6 are loaded in multiple stages as shown in FIG. As shown in FIGS. 1B and 1C and FIGS. 4A to 4C, the adsorbent case introduction lid 5a has a semi-cylindrical shape whose height is substantially equal to the height of the adsorbent case 7. One end is pivotally attached to the side surface of the end of the adsorption tower 1 with a hinge or the like. Similarly, the adsorbent case discharge lid 4a has a semi-cylindrical shape whose height is substantially equal to the height of the adsorbent case 7, and one end of the adsorbent case discharge lid 4a is pivotally attached to the side surface of the end of the adsorption tower 1 with a hinge. Yes.

（吸着剤ケース）
吸着剤ケース７は、その内部に被処理液９を通水でき、かつ吸着剤６を充填した際に吸着剤６が流出しないように、例えば、吸着剤６の粒子径ｄよりも小さい網目状からなるケースが用いられる。 (Adsorbent case)
For example, the adsorbent case 7 has a mesh shape smaller than the particle diameter d of the adsorbent 6 so that the liquid 9 can be passed through the adsorbent case 7 and the adsorbent 6 does not flow out when the adsorbent 6 is filled. The case consisting of

なお、図１乃至図４に示す吸着塔１、吸着剤ケース排出用蓋４、吸着剤ケース導入用蓋５及び吸着剤ケース７は、断面形状が円形又は半円形状であるが、吸着塔１の空洞８に吸着剤ケース７を配置可能なものであればどんな形状でもよく、例えば楕円形又は多角形状であってもよい。
また、図３に示す例では、吸着剤ケース７は吸着塔１内で６段に積まれているが、これに限定されず、段数は適宜増減することができる。 The adsorption tower 1, the adsorbent case discharge lid 4, the adsorbent case introduction lid 5 and the adsorbent case 7 shown in FIGS. 1 to 4 are circular or semicircular in cross section. Any shape may be used as long as the adsorbent case 7 can be arranged in the cavity 8, for example, an oval shape or a polygonal shape.
In the example shown in FIG. 3, the adsorbent cases 7 are stacked in six stages in the adsorption tower 1, but the present invention is not limited to this, and the number of stages can be increased or decreased as appropriate.

（吸着剤）
吸着剤ケース７に充填される吸着剤６は、天然ゼオライトや合成ゼオライトが用いられるが、その他の吸着剤、例えば、チタンケイ酸塩造粒体などを使用してもよく、プロセス条件の温度において固体であれば何でも使用できる。 (Adsorbent)
As the adsorbent 6 filled in the adsorbent case 7, natural zeolite or synthetic zeolite is used, but other adsorbents such as titanium silicate granule may be used and are solid at the temperature of the process conditions. Anything can be used.

また、ハンドリングの利便性や吸着塔１内での吸着反応の制御の容易性を考慮すると、吸着剤６を形や大きさを揃えた成型体とすることが好ましい。成型体の形状としては、例えば、略球状等が挙げられる。   In consideration of the convenience of handling and the ease of control of the adsorption reaction in the adsorption tower 1, it is preferable that the adsorbent 6 is a molded body having a uniform shape and size. Examples of the shape of the molded body include a substantially spherical shape.

また、吸着剤６が略球状の成型体であれば、表面に角がなく表面の反応性が均一であることから、ハンドリングや吸着塔１内での吸着反応の制御をより容易に実施することができるとともに、ある程度の流動性も有することから損傷する可能性も低くなるのでさらに好適である。   Further, if the adsorbent 6 is a substantially spherical molded body, the surface has no corners and the surface reactivity is uniform, so that the handling and control of the adsorption reaction in the adsorption tower 1 can be performed more easily. In addition, since it has a certain degree of fluidity, the possibility of damage is reduced.

（被処理液）
本実施形態において、被処理液９は除去対象となる不純物としてのイオンを含む水溶液、有機溶媒、又はこれらの混合溶液である。また、有機溶媒としては、例えば、エタノールが挙げられる。 (Processed liquid)
In the present embodiment, the liquid 9 to be treated is an aqueous solution containing ions as impurities to be removed, an organic solvent, or a mixed solution thereof. Moreover, as an organic solvent, ethanol is mentioned, for example.

被処理液９がイオンを含む水溶液である場合は、除去対象となるイオンは、例えばＨ＋、ＯＨ−以外のイオンとなる。また、被処理液９がイオンを含む有機溶媒である場合は、除去対象となるイオンは、例えば全てのイオンとなる。 When the liquid 9 to be treated is an aqueous solution containing ions, ions to be removed are ions other than H + and OH − , for example. Moreover, when the to-be-processed liquid 9 is an organic solvent containing ion, the ion used as removal object will be all the ions, for example.

なお、被処理液９がイオンを含む水溶液である場合は、特定のイオンのみ、例えば、Ｃｓ＋、Ｓｒ２＋、Ｃｏ２＋のみを除去するようにしてもよい。 In the case the liquid to be treated 9 is an aqueous solution containing ions, only specific ions, for example, Cs +, Sr 2+, may be removed only Co 2+.

（作用）
このように構成された不純物除去装置において、装置稼働前に吸着塔１の内部に吸着剤６を充填した吸着剤ケース７を複数多段に充填しておく。 (Function)
In the impurity removing apparatus configured as described above, a plurality of adsorbent cases 7 filled with the adsorbent 6 are filled in a plurality of stages before the apparatus is operated.

この状態で、被処理液供給口２から吸着塔１内に導入された被処理液９は、被処理液９中の不純物が吸着剤ケース７内の吸着剤６に吸着されるとともに、吸着剤６から不純物が溶出されることもないため、清浄な処理済液１０が所定の滞留時間を経た後、処理済液排出口３から排出される。   In this state, the liquid 9 to be processed introduced into the adsorption tower 1 from the liquid supply port 2 to be processed has the impurities in the liquid 9 to be adsorbed by the adsorbent 6 in the adsorbent case 7 and the adsorbent. Since no impurities are eluted from 6, the clean processed liquid 10 is discharged from the processed liquid discharge port 3 after a predetermined residence time.

被処理液９の吸着槽１内での反応時間は、被処理液９の滞留時間に略一致する。このため、所定の滞留時間を満たすように被処理液９の導入量を適宜調整することが望ましい。   The reaction time of the liquid 9 to be processed in the adsorption tank 1 substantially matches the residence time of the liquid 9 to be processed. For this reason, it is desirable to appropriately adjust the introduction amount of the liquid 9 to be treated so as to satisfy a predetermined residence time.

また、必要により加熱装置１１を稼働させて吸着塔１の内部温度を調整する。吸着剤６は温度によって吸着容量が変化するため、吸着塔１内の被処理液９の温度を最適に制御することにより、吸着容量を向上させ吸着剤ケース７の交換頻度を減らすことが可能になる。   Further, if necessary, the heating device 11 is operated to adjust the internal temperature of the adsorption tower 1. Since the adsorption capacity of the adsorbent 6 varies depending on the temperature, it is possible to improve the adsorption capacity and reduce the replacement frequency of the adsorbent case 7 by optimally controlling the temperature of the liquid 9 to be treated in the adsorption tower 1. Become.

そして、処理済液排出口３から排出される処理済液１０の水質をセンサ（図示せず）で監視し、処理済液１０の水質、例えば除去対象のイオンの成分濃度が所定の基準値に達した場合、吸着剤ケース７の交換を行う。なお、センサによる監視対象としては、特定のイオンの成分濃度に限らず、処理済液１０の導電率、又は被処理液９が放射性物質を含む場合は、排出される処理済液１０中の放射能濃度もしくは吸着塔１表面での放射線線量を用いてもよく、それぞれ吸着剤ケース７を交換する際の基準値が設定される。   Then, the water quality of the processed liquid 10 discharged from the processed liquid discharge port 3 is monitored by a sensor (not shown), and the water quality of the processed liquid 10, for example, the component concentration of ions to be removed becomes a predetermined reference value. When it reaches, the adsorbent case 7 is replaced. The monitoring target by the sensor is not limited to the specific ion component concentration, but the conductivity of the treated liquid 10 or the radiation in the treated liquid 10 that is discharged when the liquid 9 to be treated contains a radioactive substance. The active concentration or the radiation dose on the surface of the adsorption tower 1 may be used, and a reference value for replacing the adsorbent case 7 is set.

吸着剤ケース７を交換する際は、図４（ａ）〜（ｃ）に示すように、吸着剤ケース排出用蓋４ａと吸着剤ケース導入用蓋５ａを開放し、吸着剤ケース排出口１２ａから１段分の使用済みの吸着剤ケース７を取り出し、吸着剤ケース導入口１３ａから１段分の新品の吸着剤ケース７を導入した後、吸着剤ケース排出用蓋４ａと吸着剤ケース導入用蓋５ａを閉じて完了する。   When exchanging the adsorbent case 7, as shown in FIGS. 4A to 4C, the adsorbent case discharge lid 4a and the adsorbent case introduction lid 5a are opened and the adsorbent case discharge port 12a is opened. After taking out the used adsorbent case 7 for one stage and introducing a new adsorbent case 7 for one stage from the adsorbent case inlet 13a, the adsorbent case discharge lid 4a and the adsorbent case introduction lid Close 5a to complete.

（効果）
本実施形態によれば、吸着剤ケース７を吸着塔１内に多段に装填し、各吸着剤ケース７において被処理液９中の不純物を吸着反応により吸着剤６の表面に吸着除去するとともに、吸着剤ケースを１段毎に交換することで吸着剤６を有効に活用することができる。
また、吸着塔１の両端に蓋４ａ、５ａを設けたことで吸着剤ケース７を簡便に交換することができる。 (effect)
According to this embodiment, the adsorbent cases 7 are loaded into the adsorption tower 1 in multiple stages, and the impurities in the liquid 9 to be treated are adsorbed and removed on the surface of the adsorbent 6 in each adsorbent case 7 by an adsorption reaction. The adsorbent 6 can be effectively used by exchanging the adsorbent case for each stage.
Further, the adsorbent case 7 can be easily replaced by providing the lids 4a and 5a at both ends of the adsorption tower 1.

［第２の実施形態］
第２の実施形態に係る不純物吸着装置及び吸着方法を、図５及び図６参照して説明する。なお、第１の実施形態と同一又は類似の構成には同一の符号を付し、重複説明を省略する。 [Second Embodiment]
The impurity adsorption apparatus and adsorption method according to the second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same or similar structure as 1st Embodiment, and duplication description is abbreviate | omitted.

第２の実施形態では、被処理液供給口２と処理済液排出口３が吸着塔１の両端部の側面に設けられ、吸着剤ケース排出用蓋４ｂは被処理液供給口２側の吸着塔１の一方の端面を覆うように設けられ、吸着剤ケース導入用蓋５ｂは処理済液排出口３側の吸着塔１の他方の端面を覆うように設けられている。この吸着剤ケース排出用蓋４ｂ及び吸着剤ケース導入用蓋５ｂは吸着塔１のそれぞれの端面に、例えばスライド自在に又は蝶番等によって回動自在に取り付けられる。
なお、本実施形態では、図６（ａ）に示すように、吸着塔１に３段の吸着剤ケース７を装填した例を説明しているが、これに限定されず、段数は適宜変更可能である。 In the second embodiment, the processing liquid supply port 2 and the processed liquid discharge port 3 are provided on the side surfaces of both ends of the adsorption tower 1, and the adsorbent case discharge lid 4b is adsorbed on the processing liquid supply port 2 side. An adsorbent case introduction lid 5b is provided so as to cover one end face of the tower 1, and is provided so as to cover the other end face of the adsorption tower 1 on the treated liquid discharge port 3 side. The adsorbent case discharge lid 4b and the adsorbent case introduction lid 5b are attached to respective end surfaces of the adsorption tower 1 so as to be slidable or rotatable by a hinge or the like.
In the present embodiment, as shown in FIG. 6A, an example in which the adsorption tower 1 is loaded with the three-stage adsorbent case 7 is described. However, the present invention is not limited to this, and the number of stages can be changed as appropriate. It is.

吸着剤ケース７を交換する際には、図６（ａ）〜（ｃ）に示すように、吸着剤ケース排出用蓋４ｂと吸着剤ケース導入用蓋５ｂを開放し、吸着剤ケース排出口１２ｂから使用済みの吸着剤ケース７を取り出し、吸着剤ケース導入口１３ｂから新品の吸着剤ケース７を導入した後、吸着剤ケース排出用蓋４ｂと吸着剤ケース導入用蓋５ｂを閉じて完了する。   When the adsorbent case 7 is exchanged, as shown in FIGS. 6A to 6C, the adsorbent case discharge lid 4b and the adsorbent case introduction lid 5b are opened, and the adsorbent case discharge port 12b. After the used adsorbent case 7 is taken out from the adsorbent case and a new adsorbent case 7 is introduced from the adsorbent case introduction port 13b, the adsorbent case discharge lid 4b and the adsorbent case introduction lid 5b are closed.

本実施形態によれば、上記第１の実施形態の効果に加え、吸着剤導入口１３ｂから吸着剤排出口１２ｂの方向へ吸着剤ケース７を押圧することにより、又は自重により使用済みの吸着剤ケース７を吸着剤排出口１２ｂから排出することが可能となる。これにより、吸着剤ケース７の交換をさらに簡便に実施することができる。   According to the present embodiment, in addition to the effects of the first embodiment, the used adsorbent is pressed by pressing the adsorbent case 7 from the adsorbent introduction port 13b toward the adsorbent discharge port 12b or by its own weight. The case 7 can be discharged from the adsorbent discharge port 12b. Thereby, replacement | exchange of adsorption agent case 7 can be implemented still more simply.

［性能確認試験］
以下に、上記第１又は第２の実施形態の不純物吸着装置を用い性能確認試験結果を説明する。 [Performance confirmation test]
The performance confirmation test results will be described below using the impurity adsorption device of the first or second embodiment.

（従来の不純物吸着装置による性能確認試験）
吸着剤としてゼオライト系チャバサイト（ＩＥ−９６）を２７０ｇ充填した吸着塔１（容積３６０ｃｍ３）に、Ｃｓ＋（セシウムイオン）を１０００ｐｐｂとなるように海水に溶かした溶液を１１０ｍｌ／分で供給し、被処理液が吸着塔１に供給され始めた時点を０として吸着塔出口で回収した処理済液１０中のセシウムイオン濃度の経時変化を測定した。 (Performance confirmation test using conventional impurity adsorption equipment)
A solution in which Cs + (cesium ion) is dissolved in seawater so as to be 1000 ppb is supplied at 110 ml / min to an adsorption tower 1 (volume 360 cm 3) packed with 270 g of zeolite chabasite (IE-96) as an adsorbent, The time change of the cesium ion concentration in the treated liquid 10 collected at the outlet of the adsorption tower was measured by setting the time when the liquid to be treated began to be supplied to the adsorption tower 1 to 0.

測定結果を表１に示す。Ｎ．Ｄは検出下限値以下の値のことである。

Figure 2013226530
The measurement results are shown in Table 1. N. D is a value below the detection lower limit value.
Figure 2013226530

表１に示すように、経過時間３ｈまでは処理済液１０中にセシウムイオンは検出されず、ほぼ全量が除去された。例えば除去率９８％以上を要求する場合、１５ｈ経過時において処理済液１０中セシウムイオン濃度が２０ｐｐｂとなり、入口濃度１０００ｐｐｂの２％となる。即ちこの時点で吸着剤を交換する必要がある。   As shown in Table 1, cesium ions were not detected in the treated liquid 10 until the elapsed time of 3 h, and almost the entire amount was removed. For example, when a removal rate of 98% or more is required, the cesium ion concentration in the treated liquid 10 is 20 ppb after 15 hours, and the inlet concentration is 1000%. That is, it is necessary to replace the adsorbent at this point.

（本実施形態の不純物吸着装置による性能確認試験）
吸着塔１に上記と同様の成分からなる吸着剤を充填した３段の吸着剤ケース７を装填し、処理済液１０中のセシウムイオン濃度が２０ｐｐｂになった時に入口側の吸着剤ケース７を排出し、出口側に新品の吸着剤ケース７を導入した。 (Performance confirmation test by the impurity adsorption apparatus of this embodiment)
The adsorption tower 1 is loaded with a three-stage adsorbent case 7 filled with an adsorbent composed of the same components as described above. When the cesium ion concentration in the treated liquid 10 reaches 20 ppb, the adsorbent case 7 on the inlet side is Then, a new adsorbent case 7 was introduced on the outlet side.

本実施形態による１００００ＢＶの処理量を達成するまでに要した吸着剤使用量を従来の装置によるものと比較すると表２のようになる。なお、ＢＶとはベッドボリューム（吸着剤充填容積と等しい処理量）を示す。

Figure 2013226530
Table 2 shows the amount of adsorbent used required to achieve a throughput of 10,000 BV according to the present embodiment compared to that of the conventional apparatus. BV represents bed volume (a processing amount equal to the adsorbent filling volume).
Figure 2013226530

表２から本実施形態の吸着装置を用いると不純物の除去に用いる吸着剤の使用量を大幅に低減することができることがわかる。
このように、吸着剤ケースを吸着塔に多段に装填し、処理済液の水質等に応じて吸着剤ケースを１段毎に交換することで、不純物の除去効率を高く維持したまま吸着剤の使用量を低減することができる。 It can be seen from Table 2 that the amount of adsorbent used for removing impurities can be greatly reduced when the adsorption apparatus of this embodiment is used.
In this way, the adsorbent cases are loaded into the adsorption tower in multiple stages, and the adsorbent cases are exchanged for each stage according to the water quality of the treated liquid, so that the removal efficiency of the adsorbent can be maintained while maintaining high impurity removal efficiency. The amount used can be reduced.

また、吸着塔の両端に蓋を設けることにより、他の配管、機器等に影響を与えることなく吸着剤ケースを簡便に交換することができる。   Further, by providing lids at both ends of the adsorption tower, the adsorbent case can be easily exchanged without affecting other piping, equipment and the like.

以上、本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。   As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

１…吸着塔、２…被処理液供給口、３…処理済液排出口、４ａ，４ｂ…吸着剤ケース排出用蓋、５ａ，５ｂ…吸着剤ケース導入用蓋、６…吸着剤、７…吸着剤ケース、８…空洞、９…被処理液、１０…処理済液、１１…加熱装置、１２ａ，１２ｂ…吸着剤ケース排出口、１３ａ，１３ｂ…吸着剤ケース導入口。   DESCRIPTION OF SYMBOLS 1 ... Adsorption tower, 2 ... To-be-processed liquid supply port, 3 ... Treated liquid discharge port, 4a, 4b ... Adsorbent case discharge lid, 5a, 5b ... Adsorbent case introduction lid, 6 ... Adsorbent, 7 ... Adsorbent case, 8 ... cavity, 9 ... liquid to be treated, 10 ... treated liquid, 11 ... heating device, 12a, 12b ... adsorbent case outlet, 13a, 13b ... adsorbent case inlet.

Claims (5)

吸着剤が充填された吸着剤ケースを吸着塔に多段に装填し、次に前記吸着塔の一方の端部に設けられた被処理液供給口から被処理液を導入して吸着処理を実施し、次に前記吸着塔の他方の端部に設けられた処理済液排出口から排出される処理済液の水質が所定の基準値に達した場合、前記被処理液供給口側の吸着剤ケースを前記吸着塔から取り出すとともに前記処理済液排出口側から新しい吸着剤ケースを前記吸着塔に装填することを特徴とする不純物吸着方法。   The adsorbent cases filled with the adsorbent are loaded into the adsorption tower in multiple stages, and then the liquid to be treated is introduced from the liquid feed port provided at one end of the adsorption tower to perform the adsorption treatment. Next, when the water quality of the treated liquid discharged from the treated liquid discharge port provided at the other end of the adsorption tower reaches a predetermined reference value, the adsorbent case on the treated liquid supply port side And a new adsorbent case is loaded into the adsorption tower from the treated liquid discharge port side. 前記基準値は特定のイオンの成分濃度、処理済液の導電率、放射能濃度又は放射線線量に関する基準値であることを特徴とする請求項１記載不純物吸着方法。   2. The impurity adsorption method according to claim 1, wherein the reference value is a reference value relating to a component concentration of a specific ion, a conductivity of a treated liquid, a radioactivity concentration, or a radiation dose. 前記新しい吸着剤ケースを前記吸着塔の上部から装填することで、前記吸着塔の下部から前記被処理液供給口側の吸着剤ケースを取り出すことを特徴とする請求項１又は２記載の不純物吸着方法。   3. The impurity adsorption according to claim 1, wherein the new adsorbent case is loaded from the upper part of the adsorption tower, and the adsorbent case on the treated liquid supply port side is taken out from the lower part of the adsorption tower. Method. 吸着剤が充填された吸着剤ケースを多段に装填した吸着塔と、前記吸着塔の両端部にそれぞれ接続された被処理液供給口と処理済液排出口と、前記被処理液供給口側の吸着塔の端部に設けられた吸着剤ケース排出用蓋と、前記処理済液排出口側の吸着塔の端部に設けられた吸着剤ケース導入用蓋と、を備えることを特徴とする不純物吸着装置。   An adsorption tower in which adsorbent cases filled with an adsorbent are loaded in multiple stages, a treated liquid supply port and a treated liquid discharge port respectively connected to both ends of the adsorption tower, and a treated liquid supply port side An impurity comprising: an adsorbent case discharge lid provided at an end of the adsorption tower; and an adsorbent case introduction lid provided at an end of the adsorption tower on the treated liquid discharge port side. Adsorption device. 前記吸着塔の周囲に加熱装置を配置したことを特徴とする請求項４記載の不純物吸着装置。   The impurity adsorption apparatus according to claim 4, wherein a heating apparatus is arranged around the adsorption tower.
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