JPS6125659B2 - - Google Patents
Info
- Publication number
- JPS6125659B2 JPS6125659B2 JP4779780A JP4779780A JPS6125659B2 JP S6125659 B2 JPS6125659 B2 JP S6125659B2 JP 4779780 A JP4779780 A JP 4779780A JP 4779780 A JP4779780 A JP 4779780A JP S6125659 B2 JPS6125659 B2 JP S6125659B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- denitrification
- transfer screw
- uranium
- solution
- 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.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 claims description 37
- 150000001639 boron compounds Chemical class 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- -1 uranium-plutonium nitrate Chemical compound 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 description 26
- ZQPKENGPMDNVKK-UHFFFAOYSA-N nitric acid;plutonium Chemical compound [Pu].O[N+]([O-])=O ZQPKENGPMDNVKK-UHFFFAOYSA-N 0.000 description 14
- 229910052770 Uranium Inorganic materials 0.000 description 11
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 11
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 229910002007 uranyl nitrate Inorganic materials 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910052778 Plutonium Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/14—Methods for preparing oxides or hydroxides in general
- C01B13/18—Methods for preparing oxides or hydroxides in general by thermal decomposition of compounds, e.g. of salts or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/126—Microwaves
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
【発明の詳細な説明】
本発明は硝酸ウラニル、硝酸プルトニウム等の
ウラン・プルトニウム硝酸塩を加熱脱硝する装置
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for heating and denitrating uranium/plutonium nitrates such as uranyl nitrate and plutonium nitrate.
従来、たとえば使用済核燃料を再処理して得ら
れる硝酸ウラニル溶液、硝酸プルトニウム溶液あ
るいはこれらの混合溶液を加熱脱硝して酸化物を
生成するには、第１図に示す如く皿状の容器Ａ内
にこれら溶液Ｂを収容し、この容器Ａをマイクロ
波加熱器Ｃ内に収容し、マイクロ波発振器Ｄより
マイクロ波を照射して溶液Ｂを加熱脱硝して酸化
物を生成し、こののち容器Ａを取出して酸化物を
回収するいわゆるバツチ式の処理装置が用いられ
ていた。しかし、このようなものは臨界管理上１
回の処理量が制限され、大量のウラン・プルトニ
ウム硝酸塩を処理することができない等の不具合
があつた。 Conventionally, in order to generate oxides by heating and denitrifying a uranyl nitrate solution, a plutonium nitrate solution, or a mixed solution thereof obtained by reprocessing spent nuclear fuel, a solution is placed in a dish-shaped container A as shown in Fig. 1. This container A is placed in a microwave heater C, and microwave oscillator D irradiates the solution B to heat and denitrify the solution B to generate oxides. A so-called batch-type processing device was used to extract the oxides and recover the oxides. However, in terms of criticality management, this kind of thing
There were problems, such as the limited amount of processing per cycle and the inability to process large amounts of uranium and plutonium nitrate.
本発明は以上の事情にもとずいてなされたもの
で、その目的とするところは大量のウラン・プル
トニウム硝酸塩を効率よく加熱脱硝することので
きるウラン・プルトニウム酸塩加熱脱硝装置を得
ることにある。 The present invention has been made based on the above circumstances, and its purpose is to provide a uranium/plutonate thermal denitrification device that can efficiently thermally denitrify a large amount of uranium/plutonium nitrate. .
以下本発明を実施例にしたがつて説明する。第
２図は本発明の第１実施例を示す。 The present invention will be explained below using examples. FIG. 2 shows a first embodiment of the invention.
図中１は加熱脱硝筒であつて、円筒状をなし、
略水平に設けられている。そして、この加熱脱硝
筒１の一端部には溶液供給管２が接続され、この
溶液供給管２は溶液供給機構３に接続されてい
る。また、この加熱脱硝筒１の他端部には排出口
４が設けられ、この排出口４の下方には排出コン
ベア５が設けられている。そして、この加熱脱硝
筒１内には移送スクリユ６が設けられている。こ
の移送スクリユ６は螺旋状の羽根７を有し、この
羽根７の外周縁は加熱脱硝筒１の内面に摺接して
いる。そして、この移送スクリユ６は加熱脱硝筒
１に軸受８，８によつて気密をもつて軸支されて
いる。そして、この移送スクリユ６は歯車９，９
を介して回転駆動機構１０に連結され、所定の速
度で回転されるように構成されている。そして、
上記溶液供給機構３から溶液供給管２を介して加
熱脱硝筒１の一端部内に供給された硝酸ウラニル
溶液、硝酸プルトニウム溶液あるいはこれらの混
合溶液は上記移送スクリユ６の回転によつて排出
口４側に送られるように構成されている。なお、
上記加熱脱硝筒１、移送スクリユ６等はマイクロ
波透過性でかつ中性子吸収性を有するボロン化合
物材料から形成されている。また、１１は加熱機
構である。１２はそのケーシングであつて、上記
加熱脱硝筒１を囲続して設けられている。そし
て、このケーシング１２の外面には断面材１３が
設けられている。また、１４……はマイクロ波発
振器であつて、導波管１５……を介してケーシン
グ１２内に接続されている。そして、これらマイ
クロ波発振器１４……から導波管１５……を介し
て上記加熱脱硝筒１にマイクロ波が照射され、こ
の加熱脱硝筒１内を送られるウラン・プルトニウ
ム硝酸塩溶液を加熱して脱硝し、粉末状あるいは
粒状の酸化物を生成するように構成されている。
また、上記移送スクリユ６の軸部は中空に形成さ
れ、電気ヒータ、蒸気ヒータ等の補助ヒータ１６
が挿入され、加熱脱硝筒１内の溶液を加熱するよ
うに構成されている。また、この加熱脱硝筒１の
上部には排気管１７が接続され、この排気管１７
は排気処理機構１８に接続されている。そして、
上記加熱脱硝の際に生じた水蒸気、硝酸蒸気、窒
素酸化物等は上記排気処理機構１８のブロア１９
により吸引され、凝縮器２０で水分を除去される
とともに冷却され、またミストセパレータ２１で
ミストが捕獲され、さらにスクラバー２２によつ
て窒素酸化物が吸収除去され、またフイルタ２３
によつて異物が除去され外部に放出されるように
構成されている。 In the figure, 1 is a heating denitrification cylinder, which has a cylindrical shape.
It is installed almost horizontally. A solution supply pipe 2 is connected to one end of this heating denitration cylinder 1, and this solution supply pipe 2 is connected to a solution supply mechanism 3. Further, a discharge port 4 is provided at the other end of the heating denitrification cylinder 1, and a discharge conveyor 5 is provided below the discharge port 4. A transfer screw 6 is provided within the heating denitrification cylinder 1. The transfer screw 6 has a spiral blade 7, and the outer peripheral edge of the blade 7 is in sliding contact with the inner surface of the heating denitrification tube 1. The transfer screw 6 is airtightly supported on the heating denitrification cylinder 1 by bearings 8, 8. This transfer screw 6 is connected to gears 9, 9.
It is connected to the rotary drive mechanism 10 via the rotary drive mechanism 10, and is configured to be rotated at a predetermined speed. and,
The uranyl nitrate solution, plutonium nitrate solution, or a mixed solution thereof supplied from the solution supply mechanism 3 into one end of the heating denitrification cylinder 1 through the solution supply pipe 2 is transferred to the discharge port 4 side by the rotation of the transfer screw 6. is configured to be sent to. In addition,
The heating denitrification tube 1, transfer screw 6, etc. are made of a boron compound material that is microwave transparent and has neutron absorbing properties. Further, 11 is a heating mechanism. Reference numeral 12 denotes a casing thereof, which is provided so as to surround the heating denitration cylinder 1. A cross-sectional member 13 is provided on the outer surface of the casing 12. Further, 14... is a microwave oscillator, which is connected to the inside of the casing 12 via a waveguide 15.... Then, microwaves are irradiated from these microwave oscillators 14 through waveguides 15 to the heating denitrification tube 1, and the uranium-plutonium nitrate solution sent through the heating denitrification tube 1 is heated and denitrified. However, it is configured to produce powdered or granular oxides.
Further, the shaft portion of the transfer screw 6 is formed hollow, and an auxiliary heater 16 such as an electric heater or a steam heater can be used.
is inserted to heat the solution in the heating denitrification cylinder 1. Further, an exhaust pipe 17 is connected to the upper part of this heating denitrification cylinder 1, and this exhaust pipe 17
is connected to the exhaust treatment mechanism 18. and,
Water vapor, nitric acid vapor, nitrogen oxides, etc. generated during the heating denitrification are removed by the blower 19 of the exhaust treatment mechanism 18.
The water is removed and cooled by the condenser 20, the mist is captured by the mist separator 21, nitrogen oxides are absorbed and removed by the scrubber 22, and the filter 23
The structure is such that foreign matter is removed and discharged to the outside.
以上の如く構成された本発明の第１実施例は、
溶液供給機構３より硝酸ウラニル溶液、硝酸プル
トニウム溶液あるいはこれらの混合溶液が加熱脱
硝筒１内に供給され、この供給された溶液は移送
スクリユ６の回転によつて加熱脱硝筒１内は排出
口４側に移送される。そして、これとともにマイ
クロ波発振器１４……からマイクロ波が照射さ
れ、溶液が加熱脱硝され粉末状あるいは粒状の酸
化物が生成される。そして、この酸化物は移送ス
クリユ６の回転によつて送られ、排出口４より排
出され、排出コンベア５によつて送り出される。
したがつてウラン・プルトニウム硝酸塩溶液は連
続的に加熱脱硝処理がなされるので、処理能率が
きわめて大であり大量のウラン・プルトニウム硝
酸塩を処理できるものである。また、この加熱脱
硝の際に生じたガスは排気処理機構１８によつて
処理されるので、周囲の環境を汚染することはな
い。また、この第１実施例のものはマイクロ波に
よつて加熱脱硝をなすので、その高率が高い。さ
らに、移送スクリユ６内に補助ヒータ１６を設
け、この補助ヒータ１６によつても溶液を加熱で
きるようにしたので、効率が一層向上する。ま
た、このものは加熱脱硝筒１および移送スクリユ
６はボロン化合物材料より形成されており、この
ボロン化合物材料はマイクロ波透過性であるとと
もに中性子吸収性を有しているので溶液や酸化物
等から放射される中性子を遮蔽することができる
ものである。 The first embodiment of the present invention configured as described above is as follows:
A uranyl nitrate solution, a plutonium nitrate solution, or a mixed solution thereof is supplied from the solution supply mechanism 3 into the heating denitrification cylinder 1, and the supplied solution is transferred to the exhaust port 4 in the heating denitrification cylinder 1 by rotation of the transfer screw 6. transferred to the side. At the same time, microwaves are irradiated from the microwave oscillator 14, and the solution is heated to be denitrified and powdered or granular oxides are generated. Then, this oxide is sent by the rotation of the transfer screw 6, discharged from the discharge port 4, and sent out by the discharge conveyor 5.
Therefore, since the uranium/plutonium nitrate solution is subjected to continuous heating denitrification treatment, the processing efficiency is extremely high and a large amount of uranium/plutonium nitrate can be treated. Moreover, since the gas generated during this thermal denitrification is treated by the exhaust treatment mechanism 18, it does not pollute the surrounding environment. Further, in the first embodiment, heating denitrification is performed using microwaves, so the denitrification rate is high. Furthermore, since the auxiliary heater 16 is provided in the transfer screw 6 and the solution can also be heated by this auxiliary heater 16, efficiency is further improved. In addition, the heating denitrification tube 1 and the transfer screw 6 are made of a boron compound material, and this boron compound material is microwave permeable and has neutron absorbing properties, so it is protected from solutions, oxides, etc. It can shield emitted neutrons.
なお、本発明は上記の第１実施例には限定され
ない。 Note that the present invention is not limited to the first embodiment described above.
たとえば第３図および第４図には本発明の第２
実施例を示す。この第２実施例は加熱機構１１′
のケーシング１２′内に数の加熱脱硝筒１……を
設けたものである。そして、この第２実施例によ
れば処理能率がさらに増大し、より大量のウラ
ン・プルトニウム硝酸塩を処理できるものであ
る。なお、この第２実施例は上記の点以外の構成
は前記第１実施例と同様の構成で、第３図および
第４図中第１実施例と対応する部分には同符号を
附してその説明を省略する。 For example, FIGS. 3 and 4 show the second embodiment of the present invention.
An example is shown. This second embodiment has a heating mechanism 11'
A number of heating denitrification cylinders 1 are provided inside the casing 12'. According to this second embodiment, the processing efficiency is further increased and a larger amount of uranium/plutonium nitrate can be processed. This second embodiment has the same structure as the first embodiment except for the above-mentioned points, and the same reference numerals are given to the parts corresponding to those of the first embodiment in FIGS. 3 and 4. The explanation will be omitted.
以上詳述したように本発明によるウラン・プル
トニウム硝酸塩加熱脱硝装置によると、ウラン・
プルトニウム硝酸塩溶液を連続的に加熱脱硝する
ことが可能となり、処理能率を大幅に向上させ、
大量のウラン・プルトニウム硝酸塩溶液を加熱脱
硝することができる。又加熱脱硝筒および移送ス
クリユはマイクロ波透過性のみならず中性子吸収
性をも備えたボロン化合物材料により構成されて
いるので、ウラン・プルトニウム硝酸塩溶液およ
び酸化化合物等より放射される中性子を効果的に
遮蔽することができる。さらに本発明の場合には
マイクロ波加熱機構以外に移送スクリユ内に補助
加熱機構を備えているので、効率良く加熱脱硝す
ることができる。 As detailed above, according to the uranium/plutonium nitrate thermal denitrification apparatus according to the present invention, uranium/plutonium nitrate
It has become possible to continuously heat denitrify plutonium nitrate solution, greatly improving processing efficiency,
A large amount of uranium/plutonium nitrate solution can be denitrified by heating. In addition, the heating denitrification tube and transfer screw are made of boron compound material that has not only microwave permeability but also neutron absorption properties, so they can effectively absorb neutrons emitted from uranium/plutonium nitrate solutions and oxidized compounds. Can be shielded. Further, in the case of the present invention, since an auxiliary heating mechanism is provided in the transfer screw in addition to the microwave heating mechanism, efficient thermal denitration can be performed.
第１図は従来例の概略構成図、第２図は本発明
の第１実施例の要部の縦断面図、第３図および第
４図は本発明の第２実施例を示し、第３図は平面
図、第４図は正面図である。
１…加熱脱硝筒、３…溶液供給機構、４…排出
口、６…移送スクリユ、１０…回転駆動機構、１
１…加熱機構、１４…マイクロ波発振器、１６…
補助ヒータ（補助加熱機構）、１８…排気処理機
構。
FIG. 1 is a schematic configuration diagram of a conventional example, FIG. 2 is a vertical cross-sectional view of the main part of a first embodiment of the present invention, FIGS. 3 and 4 show a second embodiment of the present invention, and FIG. The figure is a plan view, and FIG. 4 is a front view. DESCRIPTION OF SYMBOLS 1... Heating denitration cylinder, 3... Solution supply mechanism, 4... Discharge port, 6... Transfer screw, 10... Rotation drive mechanism, 1
1... Heating mechanism, 14... Microwave oscillator, 16...
Auxiliary heater (auxiliary heating mechanism), 18...exhaust treatment mechanism.
Claims (1)
と、この加熱脱硝筒内に回転自在に挿通されボロ
ン化合物材料にて形成された移送スクリユと、こ
の移送スクリユを回転する回転駆動機構と、上記
加熱脱硝筒の一端部内にウラン・プルトニウム硝
酸塩溶液を供給する溶液供給機構と、上記移送ス
クリユの回転によつて上記加熱脱硝筒内に移送さ
れる上記ウラン・プルトニウム硝酸塩溶液にマイ
クロ波を照身してこれを加熱するマイクロ波加熱
機構と、前記移送スクリユ内に設置された補助加
熱機構とを具備したことを特徴とするウラン・プ
ルトニウム硝酸塩加熱脱硝装置。1. A heating denitrification tube made of a boron compound material, a transfer screw rotatably inserted into the heating denitrification tube and made of a boron compound material, a rotational drive mechanism for rotating the transfer screw, and a rotation drive mechanism for rotating the transfer screw; a solution supply mechanism for supplying a uranium-plutonium nitrate solution into one end of the denitrification cylinder, and a microwave irradiating the uranium-plutonium nitrate solution transferred into the heating denitrification cylinder by rotation of the transfer screw; A uranium-plutonium nitrate thermal denitrification device, comprising a microwave heating mechanism for heating the uranium-plutonium nitrate, and an auxiliary heating mechanism installed in the transfer screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4779780A JPS56145105A (en) | 1980-04-11 | 1980-04-11 | Apparatus for thermal denitration of metal nitrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4779780A JPS56145105A (en) | 1980-04-11 | 1980-04-11 | Apparatus for thermal denitration of metal nitrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56145105A JPS56145105A (en) | 1981-11-11 |
| JPS6125659B2 true JPS6125659B2 (en) | 1986-06-17 |
Family
ID=12785353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4779780A Granted JPS56145105A (en) | 1980-04-11 | 1980-04-11 | Apparatus for thermal denitration of metal nitrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56145105A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH076837U (en) * | 1993-06-25 | 1995-01-31 | 日本電気精器株式会社 | Bar code reader reading window |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930652B2 (en) * | 1981-04-16 | 1984-07-28 | 株式会社東芝 | Microwave heating denitrification equipment |
| JPH0141441Y2 (en) * | 1985-04-22 | 1989-12-07 | ||
| JP2798856B2 (en) * | 1992-09-16 | 1998-09-17 | 動力炉・核燃料開発事業団 | Continuous denitration equipment |
| TW536416B (en) * | 2001-03-30 | 2003-06-11 | Temjin Eco System Co Ltd | Filter-press type dewatering system, dewatering method, degassing device, check valve, and switch valve |
| JP4729344B2 (en) * | 2005-06-24 | 2011-07-20 | 原子燃料工業株式会社 | Continuous production method and continuous production apparatus for ammonium heavy uranate particles |
| KR101092889B1 (en) * | 2009-09-30 | 2011-12-12 | 주식회사 엠투 | Continuous firing furnace |
| JP5531341B2 (en) * | 2009-10-20 | 2014-06-25 | 独立行政法人日本原子力研究開発機構 | Method for producing metal oxide particles by hybrid heating method |
-
1980
- 1980-04-11 JP JP4779780A patent/JPS56145105A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH076837U (en) * | 1993-06-25 | 1995-01-31 | 日本電気精器株式会社 | Bar code reader reading window |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56145105A (en) | 1981-11-11 |
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