JPH0643292A - Radioactive waste liquid disposal device - Google Patents
Radioactive waste liquid disposal deviceInfo
- Publication number
- JPH0643292A JPH0643292A JP19965692A JP19965692A JPH0643292A JP H0643292 A JPH0643292 A JP H0643292A JP 19965692 A JP19965692 A JP 19965692A JP 19965692 A JP19965692 A JP 19965692A JP H0643292 A JPH0643292 A JP H0643292A
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- activated carbon
- rotary filter
- tank
- powder activated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は原子力発電所で発生する
放射性廃液として洗濯廃液またはシャワードレンを処理
する放射性廃液処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radioactive liquid waste treatment apparatus for treating laundry liquid waste or shower drain as radioactive liquid waste generated in a nuclear power plant.
【０００２】[0002]
【従来の技術】一般に、原子力発電所で発生する洗濯廃
液またはシャワードレンは、適切な処理を施し、洗剤成
分および洗濯などにより洗濯物から廃液に移行した汚れ
成分を除去した後、その処理水をプラント内で再使用す
るか、あるいはプラント外へ放出したりする。2. Description of the Related Art Generally, laundry waste liquid or shower drain generated in a nuclear power plant is subjected to an appropriate treatment to remove detergent components and dirt components transferred from the laundry to the waste liquid by washing and then treating the treated water. It can be reused in the plant or discharged outside the plant.
【０００３】洗濯廃液またはシャワードレンの処理は、
処理水の放射性物質濃度、あるいは環境影響調査書記載
水質（ＳＳ（懸濁固形物）濃度、ＣＯＤ（化学的酸素要
求量）濃度、ｎ−ヘキサン抽出物濃度、ＰＨ）が各発電
所で定める管理値以下になるように実施される。The treatment of laundry waste liquid or shower drain is
Management of the radioactive substance concentration of treated water or the water quality (SS (suspended solids) concentration, COD (chemical oxygen demand) concentration, n-hexane extract concentration, PH) specified by the environmental impact survey at each power plant It is implemented so that it is less than or equal to the value.
【０００４】洗濯廃液またはシャワードレンの処理シス
テムの一つとして、粉末活性炭の添加および凝集沈殿を
行う装置があり、以下にこの装置の一例を図３に基づい
て説明する。As one of the treatment systems for washing waste liquid or shower drain, there is an apparatus for adding powdered activated carbon and coagulating sedimentation. An example of this apparatus will be described below with reference to FIG.
【０００５】図３に示すように、洗濯廃液またはシャワ
ードレン（図３では洗濯廃液）は収集タンク１に収集さ
れ、バッチ毎に凝集沈殿槽２に移送される。この凝集沈
殿槽２には濃度１０００ｐｐｍ程度に相当する粉末活性
炭を添加し、上記洗濯廃液中のＣＯＤ成分、ｎ−ヘキサ
ン抽出物成分を吸着する。As shown in FIG. 3, the laundry waste liquid or shower drain (laundry waste liquid in FIG. 3) is collected in a collecting tank 1 and transferred to a coagulating sedimentation tank 2 for each batch. Powdered activated carbon having a concentration of about 1000 ppm is added to the coagulating sedimentation tank 2 to adsorb the COD component and the n-hexane extract component in the laundry waste liquid.
【０００６】次いで、凝集沈殿槽２に濃度３００ｐｐｍ
程度に相当する凝集剤（硫酸バン土）を添加し、ＣＯＤ
成分、ｎ−ヘキサン抽出物成分を吸着した粉末活性炭
と、ＳＳ（懸濁固形物）成分を凝集沈殿する。ここで、
洗濯廃液に含まれる放射性物質はその大部分がＳＳ成分
であり、本処理により放射性物質も大部分が沈殿物とな
る。Next, the coagulation sedimentation tank 2 has a concentration of 300 ppm.
Add a coagulant (van sulphate soil) corresponding to the degree of COD
The powdered activated carbon adsorbing the component and the n-hexane extract component and the SS (suspended solid matter) component are aggregated and precipitated. here,
Most of the radioactive substances contained in the laundry waste liquid are SS components, and most of the radioactive substances also become precipitates by this treatment.
【０００７】さらに、凝集沈殿槽２の上澄水を回収し、
プラント内で再使用したり、あるいはプラント外へ放出
したりする。凝集沈殿槽２の沈殿物は沈降分離槽３にド
レン貯蔵した後、遠心脱水機４により濃縮・脱水を行
い、ドラム缶５に充填する。なお、沈降分離槽３のデカ
ント水および遠心脱水処理での回収水は収集タンク１に
回収される。Further, the supernatant water of the coagulating sedimentation tank 2 is collected,
It can be reused in the plant or released to the outside of the plant. The sediment in the coagulation sedimentation tank 2 is drain-stored in the sedimentation separation tank 3 and then concentrated and dehydrated by a centrifugal dehydrator 4 and filled in a drum can 5. The decant water in the sedimentation tank 3 and the water collected by the centrifugal dehydration treatment are collected in the collection tank 1.
【０００８】[0008]
【発明が解決しようとする課題】ところで、上記洗濯廃
液の処理装置は凝集沈殿槽２において４〜５時間の凝集
沈殿時間が必要であり、この時間が待ち時間となり、設
備全体としての平均的な処理容量が低下する問題があ
る。By the way, the above-mentioned apparatus for treating laundry waste liquid requires a coagulation sedimentation time of 4 to 5 hours in the coagulation sedimentation tank 2, and this time becomes a waiting time, which is an average of the entire equipment. There is a problem that the processing capacity decreases.
【０００９】また、粉末活性炭およびＳＳ成分の除去
は、凝集沈殿を利用した浮遊分離法により行っており、
廃液性状により沈降特性が異なるなど精密濾過法に比べ
て回収水質が不安定である。Further, the removal of the powdered activated carbon and the SS component is carried out by a floating separation method utilizing coagulation sedimentation,
Compared with the microfiltration method, the quality of recovered water is unstable, such as the sedimentation characteristics differing depending on the properties of the waste liquid.
【００１０】さらに、凝集沈殿した沈殿物をドラム缶詰
めするには、沈降分離槽３、遠心脱水機４および配管、
ポンプ類が必要であり、設備が大掛かりになるなどの問
題がある。Further, in order to drum the coagulated sediment, a sedimentation / separation tank 3, a centrifugal dehydrator 4 and piping,
There is a problem that pumps are required and the equipment becomes large.
【００１１】本発明は上述した事情を考慮してなされた
もので、設備処理効率が良く、安定した回収水質が得ら
れ、コンパクトな設備規模の放射性廃液処理装置を提供
することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a radioactive waste liquid treatment apparatus having a good equipment treatment efficiency, a stable recovered water quality, and a compact equipment scale.
【００１２】[0012]
【課題を解決するための手段】本発明に係る放射性廃液
処理装置は、上述した課題を解決するために、原子力発
電所で発生した放射性廃液に粉末活性炭を混合する混合
手段と、この混合手段により混合された混合スラリを濾
過処理するロータリーフィルタとを備えたものである。In order to solve the above-mentioned problems, a radioactive liquid waste treatment apparatus according to the present invention comprises a mixing means for mixing powdered activated carbon with a radioactive liquid waste generated in a nuclear power plant, and And a rotary filter for filtering the mixed slurry mixed.
【００１３】[0013]
【作用】上記の構成を有する本発明においては、粉末活
性炭を添加した放射性廃液を直接濾過することにより、
凝集沈殿時間が不要になる。また、ロータリーフィルタ
を用いた精密濾過を行うことにより、安定した回収水質
が得られる。さらに、凝集沈殿槽、沈降分離槽、遠心脱
水機および配管、ポンプ類が不要になる。In the present invention having the above-mentioned constitution, by directly filtering the radioactive waste liquid to which the powdered activated carbon is added,
Coagulation-sedimentation time is unnecessary. In addition, stable filtration water quality can be obtained by performing microfiltration using a rotary filter. Furthermore, a flocculation-sedimentation tank, a sedimentation-separation tank, a centrifugal dehydrator, piping, and pumps are unnecessary.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１は本発明に係る放射性廃液処理装置の
一実施例を示す。この放射性廃液処理装置は混合手段と
しての洗濯廃液収集タンク１１を有し、この洗濯廃液収
集タンク１１内には洗濯廃液が収集されるとともに、粉
末活性炭が添加される。そして、粉末活性炭添加時およ
び廃液処理時におけるタンク内廃液はポンプ１２により
混合される。FIG. 1 shows an embodiment of the radioactive liquid waste treatment apparatus according to the present invention. This radioactive waste liquid treatment device has a laundry waste liquid collection tank 11 as a mixing means, and the laundry waste liquid is collected in the laundry waste liquid collection tank 11 and powdered activated carbon is added thereto. Then, the waste liquid in the tank at the time of adding the powdered activated carbon and at the time of treating the waste liquid is mixed by the pump 12.
【００１６】この混合された粉末活性炭およびＳＳ成分
スラリは開閉弁１３を介してロータリーフィルタ１４に
通液された後、処理水と、ケーク排出弁１５を経て濃縮
・脱水物（ケーク）とに分離される。この濃縮・脱水物
はドラム缶１６に充填される。The mixed powdered activated carbon and the slurry of SS component are passed through a rotary filter 14 through an opening / closing valve 13 and then separated into treated water and a concentrated / dehydrated product (cake) through a cake discharge valve 15. To be done. The concentrated / dehydrated product is filled in the drum 16.
【００１７】ここで、ロータリーフィルタ１４は、図２
に示すように耐圧構造の濾過室２０内に濾過板２１と撹
拌板２２とが狭い間隙で交互に配列され、撹拌板２２は
濾過時に一定の速度で回転する。濾過板２１は濾液排出
機構２３を有し、板の両面に濾布が張ってある。Here, the rotary filter 14 is shown in FIG.
As shown in FIG. 5, the filter plates 21 and the stirring plates 22 are alternately arranged in the pressure-resistant filter chamber 20 with a narrow gap, and the stirring plates 22 rotate at a constant speed during filtration. The filter plate 21 has a filtrate discharge mechanism 23, and filter cloth is stretched on both sides of the plate.
【００１８】そして、原料スラリは濾過室２０の一方か
ら加圧供給され、濾過板２１の間隙を縫って移動する間
に濾過・脱水される。ケークは濾過室２０の他方に配設
したケーク排出弁１５から固いペースト状になって排出
され、濾液は濾過板２１の濾液排出機構２３を経て外部
に排出される。なお、撹拌板２２はトルク制御装置２４
によりトルクが制御される。The raw material slurry is supplied under pressure from one of the filtration chambers 20 and is filtered and dehydrated while moving through the gap between the filtration plates 21. The cake is discharged in the form of a hard paste from the cake discharge valve 15 arranged on the other side of the filtration chamber 20, and the filtrate is discharged to the outside through the filtrate discharge mechanism 23 of the filter plate 21. The stirring plate 22 is a torque control device 24.
The torque is controlled by.
【００１９】すなわち、ロータリーフィルタ１４は濾膜
上に生成されるケーク層を撹拌板２２によって撹拌し、
一定の厚さ以上（固定ケーク層以上）のケークに流動性
を与える濾過器であり、濃縮・脱水したケークは濾過処
理を中断することなく、濾過器外に排出される。That is, the rotary filter 14 agitates the cake layer formed on the filter membrane by the agitating plate 22,
A filter that imparts fluidity to a cake having a certain thickness or more (more than a fixed cake layer), and the cake that has been concentrated and dehydrated is discharged outside the filter without interrupting the filtration process.
【００２０】そして、ロータリーフィルタ１４は本実施
例で処理する粉末活性炭スラリーのように、その濃縮・
脱水物がチキソトロピックな性状を有するスラリーの精
密濾過処理に適している。The rotary filter 14, like the powdered activated carbon slurry treated in this embodiment, is concentrated and
The dehydrated product is suitable for microfiltration treatment of a slurry having a thixotropic property.
【００２１】なお、他に採用可能な一般的な濾過器とし
てフィルタプレスがあるが、このフィルタプレスは静的
なケーク層を利用した濾過器であり、次の理由により上
記ロータリーフィルタの方が単位濾過面積、単位時間当
りの処理容積が大となり、本発明に適している。There is a filter press as another general filter that can be adopted. This filter press uses a static cake layer, and the rotary filter is a unit because of the following reasons. The filtration area and the processing volume per unit time are large, which is suitable for the present invention.
【００２２】すなわち、ロータリーフィルタでは一定厚
さ以上（固定層以上）のケークが流動状態にあることか
ら、通液量が固定ケーク層通液時と同等の液量が維持さ
れるものの、上記フィルタプレスではケーク層の成長に
伴い適宜濾膜からのケークの除去工程が必要であること
による。That is, in the rotary filter, since the cake having a certain thickness or more (fixed bed or more) is in a fluidized state, the liquid flow rate is the same as when the fixed cake bed is passed, but the above filter is used. This is because the press requires a step of removing cake from the filter membrane as the cake layer grows.
【００２３】次に、本実施例の作用について説明する。Next, the operation of this embodiment will be described.
【００２４】図１に示すように、洗濯廃液は洗濯廃液収
集タンク１１内に収集され、この洗濯廃液収集タンク１
１のバッチ処理毎に濃度１０００ｐｐｍ程度に相当する
粉末活性炭を添加し、これにＣＯＤ成分、ｎ−ヘキサン
抽出物成分を吸着させる。As shown in FIG. 1, the laundry waste liquid is collected in the laundry waste liquid collection tank 11, and the laundry waste liquid collection tank 1
Powdered activated carbon having a concentration of about 1000 ppm is added for each batch treatment of 1, and the COD component and the n-hexane extract component are adsorbed to this.
【００２５】次いで、ポンプ１２の循環流により粉末活
性炭添加時および廃液処理時のタンク１１内の廃液は混
合される。また、ポンプ１２によりこの混合された粉末
活性炭およびＳＳ成分スラリは開閉弁１３を介してロー
タリーフィルタ１４に通液される。Next, the waste liquid in the tank 11 at the time of adding the powdered activated carbon and the waste liquid treatment is mixed by the circulating flow of the pump 12. The mixed powdered activated carbon and the SS component slurry are passed through the on-off valve 13 to the rotary filter 14 by the pump 12.
【００２６】すると、このロータリーフィルタ１４によ
り上記廃液は、処理水と、ケーク排出弁１５を経て濃縮
・脱水物（ケーク）とに分離され、この濃縮・脱水物は
ドラム缶１６に充填される。Then, the rotary filter 14 separates the waste liquid into treated water and a concentrated / dehydrated product (cake) through a cake discharge valve 15, and the concentrated / dehydrated product is filled in a drum 16.
【００２７】このように本実施例によれば、粉末活性炭
を添加した廃液を直接濾過することにより、凝集沈殿時
間が不要になる。また、ロータリーフィルタを用いた精
密濾過を行うことにより、安定した回収水質が得られ
る。さらに、本実施例では凝集沈殿槽、沈降分離槽、遠
心脱水機および配管、ポンプ類が不要である。As described above, according to the present embodiment, the coagulation-sedimentation time becomes unnecessary by directly filtering the waste liquid containing the powdered activated carbon. In addition, stable filtration water quality can be obtained by performing microfiltration using a rotary filter. Further, in this embodiment, the coagulation sedimentation tank, the sedimentation separation tank, the centrifugal dehydrator, the piping, and the pumps are unnecessary.
【００２８】なお、上記実施例では、放射性廃液として
洗濯廃液について説明したが、これに限定することな
く、シャワードレンでも適用することができる。In the above embodiment, the laundry waste liquid has been described as the radioactive waste liquid, but the present invention is not limited to this, and a shower drain can also be applied.
【００２９】[0029]
【発明の効果】以上説明したように、本発明に係る放射
性廃液処理装置によれば、粉末活性炭を添加した廃液を
直接濾過することにより、従来必要であった凝集沈殿時
間が不要になり、処理時間を大幅に短縮することができ
る。As described above, according to the radioactive waste liquid treatment apparatus of the present invention, by directly filtering the waste liquid to which the powdered activated carbon is added, the coagulation-sedimentation time which was conventionally required becomes unnecessary, and the treatment The time can be greatly reduced.
【００３０】また、ロータリーフィルタを用いた精密濾
過を行うことにより、従来の凝集沈殿（浮遊分離）方法
に比べ、安定した回収水質が得られる。Further, by performing precision filtration using a rotary filter, a stable quality of recovered water can be obtained as compared with the conventional flocculation-precipitation (floating separation) method.
【００３１】さらに、ロータリーフィルタから回収され
る粉末活性炭およびＳＳ成分の濃縮・脱水物は、従来の
システムの遠心脱水機での回収物と同等であり、凝集沈
殿槽、沈降分離槽、遠心脱水機および配管、ポンプ類が
不要になる。その結果、設備の簡素化が図れる。Further, the concentrated / dehydrated powdered activated carbon and SS component recovered from the rotary filter are equivalent to those recovered by the centrifugal dehydrator of the conventional system, and they are a coagulating sedimentation tank, a sedimentation tank, and a centrifugal dehydrator. Also, piping and pumps are not required. As a result, the equipment can be simplified.
【図１】本発明に係る放射性廃液処理装置の一実施例を
示す概略系統図。FIG. 1 is a schematic system diagram showing an embodiment of a radioactive liquid waste treatment apparatus according to the present invention.
【図２】図１におけるロータリーフィルタの内部構造を
示す概略図。FIG. 2 is a schematic diagram showing the internal structure of the rotary filter in FIG.
【図３】従来の洗濯廃液処理装置の一例を示す概略系統
図。FIG. 3 is a schematic system diagram showing an example of a conventional laundry waste liquid treatment device.
１１ 洗濯廃液収集タンク（混合手段） １２ ポンプ １３ 開閉弁 １４ ロータリーフィルタ １５ ケーク排出弁 １６ ドラム缶 11 Washing Waste Liquid Collection Tank (Mixing Means) 12 Pump 13 Open / Close Valve 14 Rotary Filter 15 Cake Discharge Valve 16 Drum Can
Claims (1)
末活性炭を混合する混合手段と、この混合手段により混
合された混合スラリを濾過処理するロータリーフィルタ
とを備えたことを特徴とする放射性廃液処理装置。1. A radioactive waste liquid treatment, comprising: a mixing means for mixing powdered activated carbon with a radioactive waste liquid generated in a nuclear power plant; and a rotary filter for filtering the mixed slurry mixed by the mixing means. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4199656A JP2989964B2 (en) | 1992-07-27 | 1992-07-27 | Radioactive waste liquid treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4199656A JP2989964B2 (en) | 1992-07-27 | 1992-07-27 | Radioactive waste liquid treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0643292A true JPH0643292A (en) | 1994-02-18 |
| JP2989964B2 JP2989964B2 (en) | 1999-12-13 |
Family
ID=16411462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4199656A Expired - Lifetime JP2989964B2 (en) | 1992-07-27 | 1992-07-27 | Radioactive waste liquid treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2989964B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005003439A (en) * | 2003-06-10 | 2005-01-06 | Chiyoda Technol Corp | Method and device for treating waste liquid including radioactive organic waste liquid |
| JP2012233766A (en) * | 2011-04-28 | 2012-11-29 | Ohbayashi Corp | Method for removing radioactive substance in radioactive effluent and system for removing radioactive substance in radioactive effluent |
| JP2013088278A (en) * | 2011-10-18 | 2013-05-13 | Noatech Corp | Radiation contamination wastewater treatment method, treatment system and mobile processor |
| JP2013127402A (en) * | 2011-12-19 | 2013-06-27 | Toshiba Corp | Laundry waste liquid processing device and laundry waste liquid processing method |
| US8871674B2 (en) | 2011-10-31 | 2014-10-28 | Seibu Newspaper Company | Radioactive-substance-absorbent, radioactive-substance-absorbent production device, and bag unit |
| JP2016024078A (en) * | 2014-07-22 | 2016-02-08 | 株式会社東芝 | Waste liquid treatment device, waste liquid treatment method, and waste liquid treatment program |
| JP2018146590A (en) * | 2018-05-01 | 2018-09-20 | 株式会社東芝 | Waste liquid treatment device, waste liquid treatment method, and waste liquid treatment program |
-
1992
- 1992-07-27 JP JP4199656A patent/JP2989964B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005003439A (en) * | 2003-06-10 | 2005-01-06 | Chiyoda Technol Corp | Method and device for treating waste liquid including radioactive organic waste liquid |
| JP2012233766A (en) * | 2011-04-28 | 2012-11-29 | Ohbayashi Corp | Method for removing radioactive substance in radioactive effluent and system for removing radioactive substance in radioactive effluent |
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| JP2016024078A (en) * | 2014-07-22 | 2016-02-08 | 株式会社東芝 | Waste liquid treatment device, waste liquid treatment method, and waste liquid treatment program |
| JP2018146590A (en) * | 2018-05-01 | 2018-09-20 | 株式会社東芝 | Waste liquid treatment device, waste liquid treatment method, and waste liquid treatment program |
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