JPS5921525A - Denitrating apparatus - Google Patents

Denitrating apparatus

Info

Publication number
JPS5921525A
JPS5921525A JP57128971A JP12897182A JPS5921525A JP S5921525 A JPS5921525 A JP S5921525A JP 57128971 A JP57128971 A JP 57128971A JP 12897182 A JP12897182 A JP 12897182A JP S5921525 A JPS5921525 A JP S5921525A
Authority
JP
Japan
Prior art keywords
container
denitrification
cake
resin film
sheet
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.)
Pending
Application number
JP57128971A
Other languages
Japanese (ja)
Inventor
Yutaka Nakamori
中森 裕
Takeshi Kubota
雄 久保田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Engineering and Shipbuilding Co Ltd
Mitsui Zosen KK
Original Assignee
Mitsui Engineering and Shipbuilding Co Ltd
Mitsui Zosen KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Engineering and Shipbuilding Co Ltd, Mitsui Zosen KK filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Priority to JP57128971A priority Critical patent/JPS5921525A/en
Publication of JPS5921525A publication Critical patent/JPS5921525A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/12Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
    • B01J19/122Incoherent waves
    • B01J19/126Microwaves

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

PURPOSE:To improve the recovering rate of a denitrated product and to enable the disposal of a container for holding an aqueous soln. of uranium nitrate or plutonium nitrate when the aqueous soln. is denitrated by heating with irradiated microwaves, by using a heat resistant resin film or the like as the material of the container. CONSTITUTION:When a soln. of uranium nitrate or plutonium nitrate is denitrated by heating with microwaves to obtain dried uranium oxide or plutonium oxide, a container for holding the soln, is made of a disposable material such as a heat resistant resin film or fireproof paper. For example, a box-shaped container 14' is made of a polyimide resin film sheet 14 proof against 300-350 deg.C or higher and having superior releasability, and an aqueous soln. C to be treated is charged into the container 14' and heated with microwaves to form a cake D of a denitrated product. After the reaction the container 14' is easily stripped from the cake D and can be spread out to a sheet 14'', so the cake D is scarcely stuck to the sheet 14'', and the sheet 14'' can be easily disposed.

Description

【発明の詳細な説明】 本発明は、脱硝装置に係り、より詳しくは使用ずみ核燃
料再処理工場などで硝酸ウラニル溶液又は硝酸プルトニ
ウム溶液或いはこれらの混合物を脱硝して酸化ウランや
酸化プルトニウムに転換するのに用いるマイクロ波加熱
ウラン脱硝装置において、従来の不銹鋼の金属製受皿容
器に代えて、耐熱性合成樹脂フイルム、難燃性耐水紙等
からなる廃棄可能な使いすて容器を用い、脱硝操作によ
り生成した脱硝生成物を該容器から塊状まま、もしくは
破砕して分離、回収すると共に、該容器の減容、廃棄を
容易にした脱硝装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a denitrification device, more specifically, a denitrification device for denitrifying a uranyl nitrate solution, a plutonium nitrate solution, or a mixture thereof in a spent nuclear fuel reprocessing plant or the like to convert it into uranium oxide or plutonium oxide. In microwave heating uranium denitrification equipment used for The present invention relates to a denitrification device that separates and recovers the generated denitrification product from the container either in lump form or by crushing it, and also facilitates volume reduction and disposal of the container.

従来の脱硝装置では、第1図に示されるように、原料溶
液Aを不銹鋼の金属製受皿容器1に所定量注入し、充填
した後、照射オーブン2内でマイクロ波発生器3からの
マイクロ波を照射して直接加熱し、溶液を蒸発・乾固し
、分解、脱硝して酸化ウランおよび/又は酸化プルトニ
ウムの脱硝ケークを生成する。なお、受皿容器1は、モ
ータMによつて駆動されるターンテーブルaを介して回
転する。第1図中、lは排気ラインである。つぎに、受
皿容器1を取り出して、第2図に示されるように剣山状
に多数の刃を先端に設けたケークかきとり刃4でカルメ
ラ焼状に発泡した形態の脱硝ケークBを突き崩すか又は
第3図に示されるようにナイフ状の刃を先端に設けたケ
ークかきとり刃5で脱硝ケークBを突き崩すことなどに
より、脱硝ケークBを機械的に切断、破砕し、流動性を
有する粉末状又は細薄片状にして、空気輸送もしくはホ
ツパー充填等が可能な形態にして回収している。
In the conventional denitrification equipment, as shown in FIG. is irradiated and directly heated to evaporate and dry the solution, decompose and denitrify it to produce a denitrified cake of uranium oxide and/or plutonium oxide. Note that the saucer container 1 is rotated via a turntable a driven by a motor M. In FIG. 1, l is an exhaust line. Next, the saucer container 1 is taken out, and as shown in FIG. As shown in FIG. 3, the denitrification cake B is mechanically cut and crushed by crushing the denitrification cake B with a cake scraping blade 5 having a knife-like blade at the tip, and the denitrification cake B is mechanically cut and crushed into a fluid powder. Alternatively, it is recovered in a form that can be made into thin pieces and transported by air or filled in a hopper.

しかしながら、このような従来の装置においては、受皿
容器1が金属製であるために、(1)受皿容器1の下部
からのマイクロ波透過がなく、マイクロ波の吸収加熱は
受皿容器1の上部からの一方向のみとなり、(2)受皿
容器1の伝熱が良いために受皿からの放熱量が大となり
、かつ、また金属表面の電場打消し作用により受皿容器
1の近傍の脱硝物の温度が上がりにくく、(3)受皿容
器1の熱変形等が生じ易く、容器底部の平坦度が維持し
にくいので、原料溶液の不均一な液探に因る脱硝むらが
生じ、(4)受皿容器の冷却時間が必要なため操作時間
の短縮や工程の簡素化が難しいなどの欠点がある。
However, in such a conventional device, since the saucer container 1 is made of metal, (1) there is no microwave transmission from the lower part of the saucer container 1, and the absorption heating of microwaves occurs from the upper part of the saucer container 1; (2) Due to the good heat transfer of the saucer container 1, the amount of heat dissipated from the saucer is large, and the temperature of the denitrified material near the saucer container 1 increases due to the electric field canceling effect of the metal surface. (3) thermal deformation of the saucer container 1 is likely to occur, and it is difficult to maintain the flatness of the bottom of the container, resulting in uneven denitrification due to uneven liquid detection of the raw material solution; There are drawbacks such as the need for cooling time, which makes it difficult to shorten operation time and simplify the process.

また前記脱硝むらの結果、未脱硝部(硝酸ウラニル又は
硝酸プルトニウム結晶乾固物)が受皿容器1に固着しや
すく、従来の上述したようなかきとり機構ではその未脱
硝部のかきとりは困難であり、このため残留物として回
収できない部分が生じるという問題がある。また、脱硝
反応過程および発泡条件が一定ではないために、脱硝ケ
ークの表面状態および嵩密度或いは破砕強度は一様でな
い場合が多く、このため、種々のかきとり刃によるかき
とり装置が提案され、実用化されているが、これらの装
置を自動化する場合には各様の脱硝ケークを効率よく、
かつ遠隔・自動操作により容易に破砕して粉末化するこ
とは困難であり、また、装置機構も複雑で大がかりなも
のが必要となる。さらに、受皿容器1を第1図に示され
るような装置に適用して連続処理化をはかる場合には、
受皿容器1が金属製であることに起因する上記と同様な
問題が生じ、特にかきとり装置の連続処理化が問題とな
る。
Furthermore, as a result of the uneven denitrification, the undenitrated portion (uranyl nitrate or plutonium nitrate crystals) tends to stick to the saucer container 1, and it is difficult to scrape off the undenitrated portion with the conventional scraping mechanism as described above. For this reason, there is a problem that there is a portion that cannot be recovered as a residue. In addition, because the denitrification reaction process and foaming conditions are not constant, the surface condition, bulk density, or crushing strength of the denitrification cake is often not uniform. Therefore, scraping devices using various scraping blades have been proposed and put into practical use. However, when automating these devices, various denitrification cakes can be efficiently processed.
Moreover, it is difficult to easily crush and powderize by remote/automatic operation, and a complicated and large-scale device mechanism is required. Furthermore, when applying the saucer container 1 to an apparatus as shown in FIG. 1 for continuous processing,
Problems similar to those described above arise due to the fact that the saucer container 1 is made of metal, and in particular, continuous processing of the scraping device becomes a problem.

なお、第4図に示される装置について説明すると、6は
底部に開口を有する加熱室(オーブン)Eを構成する壁
で、上壁6′には複数個のマイクロ波発生器7と図示し
ないブロワーにより加熱室E内の蒸気もしくは分解ガス
を吸引排出するための排出ライン8が設けられると共に
、側壁6″の下端周囲には漏止め部材(チヨーク部)9
が設けられている。10は無端鎖チエーン11が巻廻さ
れたチエーンホイールで、モータの如き駆動機構12に
よりベルト13を介して駆動される。したがつて、これ
により複数個の受皿容器1、1′、1″・・・が連続的
に加熱室E内を移動するので連続処理が可能となる。
In addition, to explain the apparatus shown in FIG. 4, 6 is a wall constituting a heating chamber (oven) E having an opening at the bottom, and a plurality of microwave generators 7 and a blower (not shown) are installed on the upper wall 6'. A discharge line 8 for suctioning and discharging steam or decomposed gas in the heating chamber E is provided, and a leakage prevention member (chitch portion) 9 is provided around the lower end of the side wall 6''.
is provided. Reference numeral 10 denotes a chain wheel around which an endless chain 11 is wound, and is driven via a belt 13 by a drive mechanism 12 such as a motor. Therefore, since the plurality of saucer containers 1, 1', 1'', etc. move continuously within the heating chamber E, continuous processing becomes possible.

本発明は、上述した事情にかんがみてなされたもので、
上記の諸問題点を伴うことのない脱硝装置を提供するこ
とを目的とし、このため硝酸ウラニル溶液および/又は
硝酸プルトニウム溶液を上部を開口した容器に入れ、該
容器の周囲からマイクロ波を照射して加熱し、脱硝を行
なうようにした装置であつて、前記容器を耐熱樹脂フイ
ルム、耐水紙等の廃棄可能な素材で構成し、脱硝操作後
、該容器を脱硝生成物ケークから分離して廃棄するよう
にしたこと、および前記脱硝生成物ケークを粉砕して回
収する粉砕回収手段を設けたことを特徴とするものであ
る。
The present invention was made in view of the above-mentioned circumstances, and
The purpose is to provide a denitrification device that does not have the above problems, and for this purpose, a uranyl nitrate solution and/or a plutonium nitrate solution is placed in a container with an open top, and microwaves are irradiated from around the container. The device is designed to perform denitrification by heating the container, and the container is made of a disposable material such as a heat-resistant resin film or waterproof paper, and after the denitrification operation, the container is separated from the denitrification product cake and disposed of. The present invention is characterized in that a pulverization and recovery means is provided for pulverizing and recovering the denitrification product cake.

以下、図面を参照して本発明の実施例について詳しく説
明する。
Embodiments of the present invention will be described in detail below with reference to the drawings.

第5図は、廃棄可能な使いすて容器の使用例を工程順に
示す斜視図で、耐熱樹脂フイルムを使用した場合の例を
示すものである。図中14は耐熱樹脂フイルムであり、
該樹脂フイルムとしでは、ウラン/プルトニウムの硝酸
塩の脱硝反応操作温度300〜350℃以上の耐熱性を
有し、離型性の優れるポリイミド樹脂フイルム等が好ま
しい。
FIG. 5 is a perspective view showing an example of how a disposable disposable container is used in the order of steps, and shows an example in which a heat-resistant resin film is used. 14 in the figure is a heat-resistant resin film,
As the resin film, it is preferable to use a polyimide resin film or the like which has a heat resistance of 300 to 350° C. or more at a denitrification reaction temperature of uranium/plutonium nitrate and has excellent mold releasability.

該耐熱樹脂フイルム14は、図(a)に示すごときシー
ト状のフイルムを、図(b)のように四隅を折り重ねる
ことにより容易に方形の箱型容器14′を形成すること
ができる。該箱型容器14′は、図(c)のように内部
にウラン溶液Cを充填して、従来のウラン脱硝装置にお
ける受皿容器として用いウラン/プルトニウム硝酸塩を
マイクロ波加熱し、脱硝生成物ケークDが生成される。
The heat-resistant resin film 14 can be easily formed into a rectangular box-shaped container 14' by folding the four corners of a sheet-like film as shown in Figure (a) overlapping each other as shown in Figure (b). The box-shaped container 14' is filled with a uranium solution C as shown in FIG. is generated.

脱硝操作後においても、耐熱樹脂フイルムの劣化は軽微
であり離型性に優れ十分な堅牢性を有するので、使いす
て容器は図(c)の折り重ね部を開くことにより図(d
)に示すもとのシート状14″に容易に解体することが
できる。
Even after the denitrification operation, the heat-resistant resin film shows only slight deterioration and has excellent mold releasability and sufficient robustness.
) can be easily disassembled into the original sheet shape 14''.

第6図乃至第8図は、シート状フイルム14を、上記の
ごとく箱型容器14′に組み立てて保持する方法の好ま
しい例を示すものである。
6 to 8 show a preferred method for assembling and holding the sheet-like film 14 in the box-shaped container 14' as described above.

即ち、シート状のフイルムを箱型容器に組み立て保持す
る方法としは、第6図に示すように窒化硅素等耐熱セラ
ミック材よりなる枠材15により、箱型容器14′の四
隅の折り重ね部を保持し、側面を支持する方法が好まし
い。
That is, as shown in FIG. 6, the method of assembling and holding the sheet-like film in a box-shaped container is to fold the folded portions of the four corners of the box-shaped container 14' using a frame material 15 made of a heat-resistant ceramic material such as silicon nitride. A method of holding and supporting the sides is preferred.

前記枠材15の着脱方式としては、第7図(a)(b)
に示すように、枠組15を、箱型容器14′の側面に当
接した状態(図a)から、これを転倒(図b)して離脱
させる転倒方式、或いは第8図(a)〜(c)に示すよ
うに枠材15を箱型容器14′に向けてスライド(図a
)させて、該箱型容器14′の側面に当接(図b)させ
、脱硝操作後再び外方にスライド(図c)させて離脱さ
せるスライド方式等が可能であり、シート状フイルムの
装荷→箱型容器形成→溶液充液→マイクロ波照射、加熱
・脱硝→脱硝ケークの粉砕等により回収→廃容器の減容
・廃棄の一連の操作を遠隔・自動化するシステムに好適
な方式を随意選択することが可能である。
The method of attaching and detaching the frame material 15 is shown in FIGS. 7(a) and 7(b).
As shown in Fig. 8, the frame 15 is brought into contact with the side surface of the box-shaped container 14' (Fig. 8a), and then the frame 15 is overturned (Fig. 8b) to be removed. Slide the frame material 15 toward the box-shaped container 14' as shown in c) (Fig. a).
), the box-shaped container 14' is brought into contact with the side surface (Fig. b), and after the denitrification operation, it is slid outward again (Fig. c) to be removed. → Formation of a box-shaped container → Filling with solution → Microwave irradiation, heating and denitrification → Recovery by crushing the denitrification cake, etc. → Select a method suitable for a system that remotely and automates the series of operations such as volume reduction and disposal of waste containers. It is possible to do so.

第9図は、前記使いすて容器を使用した本発明の連続処
理マイクロ波加熱脱硝装置の一例を示す断面説明図であ
り、前述した第4図と同一記号は同一部品を示すもので
ある。
FIG. 9 is an explanatory cross-sectional view showing an example of the continuous processing microwave heating denitration apparatus of the present invention using the disposable container, and the same symbols as in FIG. 4 described above indicate the same parts.

耐熱セラミツク等より成る枠材15は、無端鎖チエーン
等のコンベヤ11に設置され、前記第7図もしくは第8
図に示される着脱機能を有する駆動装置で固定される。
A frame material 15 made of heat-resistant ceramic or the like is installed on a conveyor 11 such as an endless chain, and is
It is fixed by a drive device with the detachable function shown in the figure.

また、枠材15と同材質の底板16も、該枠材15と組
み合わせてコンベヤ11に設置され、コンベヤ駆動装置
12およびベルト13により、図中矢印の方向に移動循
環する。コンベヤ11上のマイクロ波照射オーブンEよ
り手前の位置において、枠材15、耐熱樹脂フイルムシ
ート14を装荷し、箱型容器形成装置により第5図(b
)の如き箱型容器を形成し、次いで枠材15を、第7図
の如き転倒方式または第8図の如きスライド方式で駆動
することにより固定して、箱型容器を固定した後、溶液
供給ライン20より該容器中に溶液を充液する。コンベ
ヤ11の移動に伴い、使いすて受皿容器21はマイクロ
波漏洩を防止するチヨーク部9を通じてマイクロ波照射
オーブンE、E′、E″内を順次通過してマイクロ波加
熱される。8は、加熱、脱硝に伴い発生する蒸気および
分解ガスを吸引排出するための排出ラインである。脱硝
生成物ケークDは、マイクロ波照射オーブンE″の他端
から排出された後、該オーブンE″直後の解体部におい
て枠材15が解体されることにより露出され、把み装置
等により、容易にコンベヤ11上から移送コンベヤ22
上に搬送して回収することができる。一方、コンベヤ1
1上の枠組15、底板16は、コンベヤ11と共に移動
して循環し再使用される。移送コンベヤ22上の脱硝生
成物ケークDは、移送されて、例えばローラー粉砕機2
3等によつて使いすて容器21′と共に押しつぶす等し
て粗粉砕し、該ケーク破砕物のみを回収してローラー粉
砕機23の下部に設置した粉砕機24により更に細かく
破砕した後、粉末回収容器25に収納される。一方、解
体した使いすて容器21′は、シート状に戻した後、廃
容器シート収容器26に折り重ねるなどして十分減容し
、収納して廃棄する。
Further, a bottom plate 16 made of the same material as the frame material 15 is also installed on the conveyor 11 in combination with the frame material 15, and is moved and circulated in the direction of the arrow in the figure by the conveyor drive device 12 and the belt 13. At a position before the microwave irradiation oven E on the conveyor 11, the frame material 15 and the heat-resistant resin film sheet 14 are loaded, and the box-shaped container forming device
) is formed, and then the frame material 15 is fixed by driving it in an overturning manner as shown in FIG. 7 or a sliding method as shown in FIG. 8. After fixing the box-shaped container, the solution is supplied. The solution is filled into the container through line 20. As the conveyor 11 moves, the disposable saucer container 21 passes through the microwave irradiation ovens E, E', and E'' sequentially through the cheese yoke part 9 that prevents microwave leakage, and is heated by microwaves. This is a discharge line for suctioning and discharging steam and cracked gas generated during heating and denitrification.After the denitrification product cake D is discharged from the other end of the microwave irradiation oven E'', it is placed immediately after the oven E''. The frame material 15 is dismantled in the dismantling section, exposed, and easily removed from the top of the conveyor 11 to the transfer conveyor 22 using a gripping device or the like.
It can be transported to the top and collected. On the other hand, conveyor 1
The framework 15 and bottom plate 16 on the conveyor 11 move together with the conveyor 11, circulate, and are reused. The denitrification product cake D on the transfer conveyor 22 is transferred to, for example, a roller crusher 2.
The crushed cake is crushed by crushing it together with the disposable container 21' using a roller crusher 23, etc., and the crushed cake is crushed further by the crusher 24 installed at the bottom of the roller crusher 23, and then the powder is recovered. It is stored in a container 25. On the other hand, the disassembled single-use container 21' is returned to a sheet shape, and then folded into the waste container sheet storage container 26 to sufficiently reduce its volume, and then stored and disposed of.

第10図は、コンベヤ移動方向にマイクロ波照射オーブ
ンEをみた背面図であり、コンベヤ11に設置された枠
材15、底板16は、照射オーブンEのチヨーク9を設
けた開口部より搬入、搬出される。
FIG. 10 is a rear view of the microwave irradiation oven E seen in the direction of conveyor movement, and the frame material 15 and bottom plate 16 installed on the conveyor 11 are carried in and out of the irradiation oven E through the opening provided with the cheese yoke 9. be done.

なお、前記実施例では、耐熱性樹脂フイルムから成る使
いすて容器を用い、脱硝操作後、該容器を解体すること
により脱硝生成物ケークから分離した後、十分減容して
廃棄しているが、該容器はこれを焼却処理して減容化す
ることも可能である。
In the above example, a disposable container made of a heat-resistant resin film was used, and after the denitrification operation, the container was dismantled to separate it from the denitrification product cake, and the container was then sufficiently reduced in volume and disposed of. It is also possible to reduce the volume of the container by incinerating it.

即ち、使いすて容器の素材として耐水紙を使用し、更に
好ましくは耐水コーテイング材(通常はポリエチレン等
の合成樹脂)もしくは含浸材に熱分解の容易な物質を選
択すれば、該容器及びウラン脱硝生成物をマイクロ波加
熱するうちに、脱硝生成物が300〜350℃を超えて
加熱昇温されるに伴い、耐水紙のセルロースは乾燥の後
、自然発火するに到る。更に、原料溶液中の硝酸の作用
により、セルロース等の一部が硝化されるために発火性
を呈し、発火、燃焼が生じやすくなる。また、難燃性の
耐水紙を用いる場合には、脱硝処理後脱硝生成物ケーク
回収後に、残存する容器を焼却炉等中において焼却する
ことができる。
That is, if waterproof paper is used as the material for the disposable container, and more preferably, a material that is easily thermally decomposed is selected as the waterproof coating material (usually a synthetic resin such as polyethylene) or the impregnating material, then the container and uranium denitrification During microwave heating of the product, the temperature of the denitrified product exceeds 300 to 350° C., and the cellulose of the waterproof paper spontaneously ignites after drying. Furthermore, due to the action of nitric acid in the raw material solution, part of the cellulose etc. is nitrified, making it flammable, making it more likely to cause ignition and combustion. Furthermore, when flame-retardant and water-resistant paper is used, the remaining container can be incinerated in an incinerator or the like after the denitrification product cake is recovered after the denitrification treatment.

上述したように、本発明はマイクロ波加熱ウラン脱硝装
置において、従来の不銹鋼の金属性受皿容器に代えて、
耐熱性樹脂フイルムもしくは耐水紙等からなる廃棄可能
な使いすて容器を用い、脱硝操作により生成した脱硝生
成物を該容器から塊状のまま、もしくは破砕して分離、
回収すると共に、該容器を減容、廃棄するようにしたも
のであり、本発明は下記の利点を有する。
As mentioned above, the present invention provides a microwave heating uranium denitrification device that replaces the conventional metal saucer container made of stainless steel.
Using a disposable, disposable container made of heat-resistant resin film or water-resistant paper, etc., the denitrification product produced during the denitrification operation is separated from the container as a lump or by crushing it.
In addition to collecting the container, the volume of the container is reduced and the container is disposed of.The present invention has the following advantages.

(1)使いすて容器は、リサイクル使用が不要であり、
該容器から粗略な機械的かきとり操作を行ない、必要に
応じて更に後処理として該容器から残留脱硝生成物の回
収処理(機械的操作および溶解等の化学処理或いはこれ
らの組み合わせ)を行なうことにより、該容器からの脱
硝生成物かきとり操作を簡素化し、操作時間を大幅に短
縮することができる。
(1) Single-use containers do not need to be recycled;
By carrying out a rough mechanical scraping operation from the container, and if necessary, performing further post-treatment to recover the residual denitrification product from the container (mechanical operation and chemical treatment such as dissolution, or a combination thereof), The operation of scraping the denitrification product from the container can be simplified and the operation time can be significantly shortened.

(2)使いすて容器の素材として、脱硝生成物の離型性
に優れるポリイミド樹脂フイルム或いはそのコーテイン
グもしくはパラフイン、エチレン等の耐水性コーテイン
グを施した耐水紙を使用すれば、脱硝生成物ケークの該
容器からの離型、剥離回収は容易かつ完全になり、脱硝
生成物の回収率が向上する。
(2) If the material for the disposable container is polyimide resin film or its coating, which has excellent release properties for denitrification products, or water-resistant paper coated with water-resistant coatings such as paraffin or ethylene, the denitrification product cake can be easily removed. The mold release and peeling recovery from the container becomes easy and complete, and the recovery rate of the denitrified product is improved.

(3)使いすて容器のリサイクル使用は不要であり、受
皿容器としての該容器の冷却も不要となるので、工程の
簡素化および操作時間の短縮が可能である。
(3) There is no need to recycle a disposable container, and there is no need to cool the container as a saucer container, so the process can be simplified and the operation time can be shortened.

(4)受皿容器の溶液保持能は、樹脂フイルムもしくは
耐水紙等からなる容器が有するので、強度部材として、
必要に応じて底部および側面を支持する枠材を設けるの
みでよく、かつこれらは水密性が不要であるので、分割
構造にすることが可能である。
(4) Since the solution holding capacity of the saucer container is a container made of resin film or waterproof paper, it can be used as a strength member.
It is only necessary to provide frame members to support the bottom and side surfaces as necessary, and since these do not require watertightness, it is possible to have a split structure.

(5)スケールアップに際しては、従来法の如き大型の
不銹鋼製容器(鍛鋼品をくり抜き加工にて制作)或いは
セラミツク容器の制作の場合に問題となる品質管理の困
難性およびコスト増が回避でき、かつ成型性の困難な窒
化硅素等のマイクロ波透過性耐熱セラミツクの使用が可
能である。
(5) When scaling up, it is possible to avoid the difficulty of quality control and increase in cost that are problems when producing large stainless steel containers (manufactured by hollowing out forged steel products) or ceramic containers as in the case of conventional methods. Moreover, it is possible to use a microwave-transparent heat-resistant ceramic such as silicon nitride, which is difficult to mold.

また、使いすて容器の場合には、該容器が核燃料物質汚
染廃棄物となるが、本発明では下記のようにしてこの問
題点を改良できる。
Further, in the case of a single-use container, the container becomes nuclear fuel contaminated waste, but this problem can be improved in the present invention as described below.

(イ)使いすて容器は、離型性が良好であり、更に後処
理を行なうことにより、該容器中に残留するウラン、プ
ルトニウムを極微量に低減化できる。
(a) The disposable container has good mold releasability, and by further post-processing, the amount of uranium and plutonium remaining in the container can be reduced to a very small amount.

(ロ)使いすて容器は、脱硝生成物ケークを回収後、容
易にシート状もしくは平板状に解体可能であるので、廃
棄物の廃棄に際しては、減容効果が大となり、そのまま
廃棄物缶に収納して保管することが可能である。
(b) After collecting the denitrification product cake, the disposable container can be easily disassembled into a sheet or flat plate, so when disposing of the waste, the volume reduction effect is large and it can be directly transferred to the waste can. It can be stored and stored.

(ハ)更に、前述したように、加熱脱硝時もしくは脱硝
生成物ケーク回収後に、使いすて容器を焼却処理して減
容化することも可能である。
(c) Furthermore, as described above, it is also possible to reduce the volume by incinerating the disposable container during thermal denitrification or after recovering the denitrification product cake.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図乃至第4図は従来の脱硝装置を示すもので、第1
図は主要部の縦断側面図、第2図、第3図は受皿容器部
分の縦断側面図、第4図は全体図、第5図乃至第10図
は本発明の脱硝装置の実施例を示すもので、第5図は使
いすて容器の使用例を工程順に示す図、第6図乃至第8
図は使いすて容器を保持する枠材の着脱状態を示す図、
第9図は装置全体図、第10図はその背面図である。 1、21・・・容器、7・・・マイクロ波発生器、14
・・・耐熱樹脂フイルム、23、24・・・粉砕機、2
5・・・粉末回収容器、26・・・廃容器シート収容器
、D・・・脱硝生成物ケーク。
Figures 1 to 4 show conventional denitrification equipment.
The figure shows a vertical side view of the main part, Figures 2 and 3 are vertical side views of the saucer container part, Figure 4 is an overall view, and Figures 5 to 10 show embodiments of the denitrification device of the present invention. Figure 5 is a diagram showing examples of how disposable containers are used in the order of processes, and Figures 6 to 8 are
The figure shows the attachment and detachment of the frame material that holds the disposable container.
FIG. 9 is an overall view of the device, and FIG. 10 is a rear view thereof. 1, 21... Container, 7... Microwave generator, 14
...Heat-resistant resin film, 23, 24...Crusher, 2
5... Powder collection container, 26... Waste container sheet container, D... Denitrification product cake.

Claims (1)

【特許請求の範囲】 1、硝酸ウラニル溶液および/又は硝酸プルトニウム溶
液を上部を開口した容器に入れ、該容器の周囲からマイ
クロ波を照射して加熱し、脱硝を行なうようにした装置
であって、前記容器を耐熱樹脂フイルム、耐水紙等の廃
棄可能な素材で構成し、脱硝操作後、該容器を脱硝生成
物ケークから分離して廃棄するようにしたことを特徴と
する脱硝装置。 2、硝酸ウラニル溶液および/又は硝酸プルトニウム溶
液を上部を開口した容器に入れ、該容器の周囲からマイ
クロ波を照射して加熱し、脱硝を行なうようにした装置
であって、前記容器を耐熱樹脂フイルム、耐水紙等の廃
棄可能な素材で溝成し、脱硝操作後、該容器を脱硝生成
物ケークから分離して廃棄すると共に、前記脱硝生成物
ケークを粉砕して回収する粉砕回収手段を設けたことを
特徴とする脱硝装置。
[Claims] 1. An apparatus in which a uranyl nitrate solution and/or a plutonium nitrate solution is placed in a container with an open top, and heated by irradiating microwaves from around the container to perform denitrification. . A denitrification device, characterized in that the container is made of a disposable material such as a heat-resistant resin film or waterproof paper, and after the denitrification operation, the container is separated from the denitrification product cake and disposed of. 2. A device in which a uranyl nitrate solution and/or a plutonium nitrate solution is placed in a container with an open top, and the container is heated by irradiating microwaves from around the container to perform denitrification, and the container is made of heat-resistant resin. A groove is formed with a disposable material such as a film or waterproof paper, and after the denitrification operation, the container is separated from the denitrification product cake and disposed of, and a crushing recovery means is provided for crushing and recovering the denitrification product cake. A denitrification device characterized by:
JP57128971A 1982-07-26 1982-07-26 Denitrating apparatus Pending JPS5921525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57128971A JPS5921525A (en) 1982-07-26 1982-07-26 Denitrating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57128971A JPS5921525A (en) 1982-07-26 1982-07-26 Denitrating apparatus

Publications (1)

Publication Number Publication Date
JPS5921525A true JPS5921525A (en) 1984-02-03

Family

ID=14997929

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57128971A Pending JPS5921525A (en) 1982-07-26 1982-07-26 Denitrating apparatus

Country Status (1)

Country Link
JP (1) JPS5921525A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149311U (en) * 1984-09-03 1986-04-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149311U (en) * 1984-09-03 1986-04-02

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