JPS6374918A - Recovery of uranium hexafluoride - Google Patents
Recovery of uranium hexafluorideInfo
- Publication number
- JPS6374918A JPS6374918A JP21895486A JP21895486A JPS6374918A JP S6374918 A JPS6374918 A JP S6374918A JP 21895486 A JP21895486 A JP 21895486A JP 21895486 A JP21895486 A JP 21895486A JP S6374918 A JPS6374918 A JP S6374918A
- Authority
- JP
- Japan
- Prior art keywords
- hydrolysis
- gas
- ice
- residual
- valve
- 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
- SANRKQGLYCLAFE-UHFFFAOYSA-H uranium hexafluoride Chemical compound F[U](F)(F)(F)(F)F SANRKQGLYCLAFE-UHFFFAOYSA-H 0.000 title claims description 7
- 238000011084 recovery Methods 0.000 title description 5
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 27
- 230000007062 hydrolysis Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract 1
- DCRGHMJXEBSRQG-UHFFFAOYSA-N 1-[1-(cyclooctylmethyl)-5-(hydroxymethyl)-3,6-dihydro-2H-pyridin-4-yl]-3-ethyl-2-benzimidazolone Chemical compound O=C1N(CC)C2=CC=CC=C2N1C(CC1)=C(CO)CN1CC1CCCCCCC1 DCRGHMJXEBSRQG-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業分野）
本発明はＵＦｅシリンダー内の残留ＵＦ＠を、ＵＰ・の
トラップと加水分解とを同時に行うことにより連続的に
回収する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field) The present invention relates to a method for continuously recovering residual UF@ in a UFe cylinder by simultaneously trapping and hydrolyzing UP.
（従来技術とその問題点）
従来のＵＦ’＠ シリンダー内の残留ＵＦｅの回収は第
２図で示すように、
（１）コールドトラップ１０１を一５０℃〜−３０℃に
冷却し、次に真空ポンプ１０２でコールドトラップ１０
２内を負圧にする。このとき、バルブ１０３は閉、バル
ブ１０４を開とする。(Prior art and its problems) The recovery of residual UFe in the conventional UF'@ cylinder is as shown in Figure 2: (1) Cool the cold trap 101 to -50°C to -30°C, and then vacuum Cold trap 10 with pump 102
Make negative pressure inside 2. At this time, valve 103 is closed and valve 104 is opened.
（２） バルブ１０４を閉とし、バルブ１０３を開と
し、ＵＦｓ シリンダー内の残留ＵＦ６を吸引、回収す
る。回収後バルブ１０３を閉とする。(2) Close the valve 104 and open the valve 103 to suction and collect the residual UF6 in the UFs cylinder. After recovery, valve 103 is closed.
（３） 次に、コールドトラップ１０１を８０℃〜１
００℃に加熱し、バルブ１０３を開とし、加水分解工程
に供給する。(3) Next, the cold trap 101 is heated to 80℃~1
The sample is heated to 00° C., the valve 103 is opened, and the sample is supplied to the hydrolysis step.
この方法では冷却と加熱を交互にく炒返えし、複雑な操
作を必要とし、回収と加水分解を別個に行う。This method involves alternating cooling and heating, requires complex operations, and separate recovery and hydrolysis.
（発明の目的）
本発明の目的は上記の従来技術の問題点を解決し、冷却
と加熱なくり返えすことなく、ＵＦ・シリンダー内の残
留ＵＦ４を連続的に吸引・回収するとともに加水分解を
同時に行うことのできる六７ツ化ウランの回収方法を提
供するにある。(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems of the prior art, and to continuously suction and recover residual UF4 in the UF cylinder without repeating cooling and heating, and to hydrolyze it. It is an object of the present invention to provide a method for recovering uranium hexatide which can be carried out simultaneously.
（発明の構成）
すなわち、本発明によれば、保冷した加水分解カラムの
内部空間を多孔板で二分し、上部空間には氷ホッパーと
連結した氷充填層を設け、下部空間にはノズルを設けて
ＵＦ・シリンダー内の残留ＵＰ＠を連続的に吸引・回収
するとともに回収されたＵＰ、ガスを氷充填層の氷と反
応して加水分解させＵＯｔＦｔ液とｔ（Ｆガスとを生成
し、ＵＯｔＰｌ液を加水分解カラムの底部よりＵＯｍＦ
ｍ貯槽に落下させ、ｆ（Ｆガスは加水分解カラムの頂部
より吸引さ汎てアルカリスクラバーを経て排気設備に送
られることを特徴とする六フッ化ウランの回収方法、が
得られろ。(Structure of the Invention) That is, according to the present invention, the internal space of a refrigerated hydrolysis column is divided into two by a perforated plate, an ice packed layer connected to an ice hopper is provided in the upper space, and a nozzle is provided in the lower space. The remaining UP@ in the UF cylinder is continuously sucked and collected, and the recovered UP and gas are reacted with ice in the ice packed bed and hydrolyzed to generate UOtFt liquid and t(F gas, and UOtPl The solution is pumped from the bottom of the hydrolysis column to UOmF.
A method for recovering uranium hexafluoride is obtained, characterized in that the uranium hexafluoride is dropped into a storage tank, and the uranium hexafluoride gas (f) is sucked from the top of a hydrolysis column and sent to an exhaust facility via an alkaline scrubber.
次に、本発明を図面によって説明する。Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一１１施例に使用される装置系統図で
ある。この装置系統図における動作について述べる。FIG. 1 is a system diagram of an apparatus used in one eleventh embodiment of the present invention. The operation in this device system diagram will be described.
（１）バルブ１． ２． ３． ６を閉、バルブ５を開
として真空ポンプ７を運転して加水分解カラム８を負圧
の状！！ＩＫ保つ。次に、バルブ５を閉としてバルブ２
を開とした状ｔｑにしてＵＦ４シリ“ンダー（図示せず
）内の残留ＵＦ＠を吸引して回収する。(1) Valve 1. 2. 3. 6 is closed, valve 5 is opened, and the vacuum pump 7 is operated to create a negative pressure in the hydrolysis column 8! ! Keep IK. Next, with valve 5 closed, valve 2
The remaining UF@ in the UF4 cylinder (not shown) is sucked and collected by opening the tq.
この時、ＵＦ・ガス配管２ｍは８０〜１００℃に保温さ
れ、ＵＦ”・ガスの固化を防止する。加水分解カラム８
内に吸引ノズル１０を介し吸引されたＵＦ・ガス９は多
孔板１２を通り、氷充填層１３の氷と反応し、ＵＯｍＦ
ｔ液９ａとＨＦガｘｓｂｃ加水分解される。ＵＰ、の加
水分解反応はＵＦ５１モルあたり約１００ ｋｃａｌの
発熱を伴うため、氷との反応時には氷の！５！蘭は融解
される。ＵＦ。At this time, the 2 m of UF gas piping is kept at a temperature of 80 to 100°C to prevent solidification of the UF gas. Hydrolysis column 8
The UF gas 9 sucked into the interior through the suction nozzle 10 passes through the perforated plate 12, reacts with the ice in the ice packed bed 13, and becomes UOmF.
T solution 9a and HF gas xsbc are hydrolyzed. The hydrolysis reaction of UP is accompanied by an exotherm of about 100 kcal per mole of UF, so when it reacts with ice, the ice! 5! The orchid is melted. U.F.
の加水分解で生成したＵＯ＊Ｆｇ水溶液９ａは多孔板１
２を通って加水分解カラム８の下部に溜る。The UO*Fg aqueous solution 9a generated by the hydrolysis of the porous plate 1
2 and accumulates at the bottom of the hydrolysis column 8.
加水分解カラム８の負圧がＵＦ、シリンダー内の圧力と
同圧になった段階でバルブ２が閉となり、次に、バルブ
６が開となって、加水分解カラム８とＵ Ｏ＊ Ｆ’
を液貯槽１１が均圧（同圧）になり、次いでバルブ３を
開にしてＵＯ＊Ｆｍ水溶液を下部の貯槽１１に落下せし
める。When the negative pressure in the hydrolysis column 8 becomes UF, the same pressure as the pressure inside the cylinder, the valve 2 is closed, and then the valve 6 is opened, and the hydrolysis column 8 and U O * F'
The pressure in the liquid storage tank 11 is equalized (the same pressure), and then the valve 3 is opened to allow the UO*Fm aqueous solution to fall into the storage tank 11 at the bottom.
（２） 加水分解カラム８は一５〜ｏ℃に保冷されて
おり、＋１）の操作を繰り返すことによって、ＵＦ’。(2) The hydrolysis column 8 is kept cool at -5°C to 0°C, and UF' is obtained by repeating the operation of +1).
シリンダー内の残留ＵＦ・を連続的に吸引・回収し、同
時に加水分解することができる。The residual UF in the cylinder can be continuously sucked and collected, and hydrolyzed at the same time.
（３）加水分解によって生匝したＵＯｔＦｚ水溶液９ａ
は５０〜３００，９Ｕ／Ｊ の水溶液となるが、凝固点
降下により前記の一５〜θ℃の範囲では凍結しない。(3) UOtFz aqueous solution 9a made raw by hydrolysis
becomes an aqueous solution of 50 to 300.9 U/J, but does not freeze in the above-mentioned range of 15 to θ°C due to the freezing point depression.
（４）また、加水分解によって発生したＨＦ’ガス９ｂ
は真空ポンプ７を経てアルカリスクラバー１６で除去・
回収され、残りのガスは排気設備１８に：放出される。(4) Also, HF' gas 9b generated by hydrolysis
is removed by the alkaline scrubber 16 via the vacuum pump 7.
The remaining gas is discharged to exhaust equipment 18.
（発明の効果）
本発明は上記の構成をとることによって、次の効果を奏
することができる。(Effects of the Invention) By adopting the above configuration, the present invention can achieve the following effects.
（１） 従来技術のよ５な冷却と加熱を交互ｒｃ繰り
返す複雑な操作を必要とすることなく、連続的にＵＦ、
シリンダー内の残留ＵＦ４を吸引、回収することができ
る。(1) Continuous UF,
The remaining UF4 inside the cylinder can be sucked and collected.
（２１ＵＰ＠の回収と同時に加水分解をすることができ
る。(Hydrolysis can be carried out at the same time as the recovery of 21UP@.
第１図は本発明の一実施例に使用される装置の一部断面
を含む正面図、第２図は従来技術の一例に使用される装
置の一部断面を含む正面図である。
図において、
１、２．３．４．５．６．−−−−バルブ７−−−−−
真空ポンプ
８−−−−一加水分屏カラム
８ｍ−−−一保冷層
９−−−−− ＩＪ Ｆ、ガス
９ａ−−−−Ｕ Ｏ２Ｐ １水溶液
９ｂ−−−−ＨＦ’ガス
１０−−−−−ノズル
１１−−−−− ＵＯ＊ Ｆ’ｓ液貯槽１２−−−−一
多孔板
１３−−−−一氷充＊層
１４−−−−一氷ホツバ−
１５−−−−一裂氷機
１５ｇ−−−一部 水
１６−−−−アルカリスクラバー
１７−−−−ボ ン プ
１８−−−一排気設備
１０１−−−−コールドトラップ
１０２−−−一真空ポンプ
１０３、１０４−−−バルブ
１０５−−＝ＵＦｓ ガス
１０６−−−−ケミカルトラツプ
１０７−−−−排気設備
１０８−−−一冷媒又は熱媒
１０９−−−一圧力計FIG. 1 is a partially sectional front view of a device used in an embodiment of the present invention, and FIG. 2 is a partially sectional front view of a device used in an example of the prior art. In the figure, 1, 2.3.4.5.6. -----Valve 7------
Vacuum pump 8-----1 Hydrolysis folding column 8m-----1 Cooling layer 9----- IJ F, gas 9a---U O2P 1 Aqueous solution 9b----HF' gas 10---- --- Nozzle 11 --- UO* F's liquid storage tank 12 ---- One perforated plate 13 --- One Ice-filled* layer 14 --- One Ice hoverer 15 ---- One Ice breaking machine 15g --- Part Water 16 --- Alkaline scrubber 17 --- Bump 18 --- Exhaust equipment 101 --- Cold trap 102 --- Vacuum pump 103, 104- --- Valve 105 ---=UFs Gas 106 --- Chemical trap 107 --- Exhaust equipment 108 --- Refrigerant or heating medium 109 --- Pressure gauge
Claims (1)
分し、上部空間には氷ホッパーと連結した氷充填層を設
け、下部空間にはノズルを設けてＵＦ＿６シリンダー内
の残留ＵＦ＿８を連続的に吸引・回収するとともに同時
に回収されたＵＦ＿４ガスを氷充填層の氷と反応して加
水分解させＵＯ＿２Ｆ＿２液とＨＦガスとを生成し、Ｕ
Ｏ＿２Ｆ＿２液を加水分解カラムの底部よりＵＯ＿２Ｆ
＿２貯槽に落下させ、ＨＦガスは加水分解カラムの頂部
より吸引されてアルカリスクラバーを経て排気設備に送
られることを特徴とする六フッ化ウランの回収方法。(1) The internal space of the refrigerated hydrolysis column is divided into two by a perforated plate, the upper space is equipped with an ice packed bed connected to an ice hopper, and the lower space is equipped with a nozzle to continuously remove the residual UF_8 in the UF_6 cylinder. At the same time, the UF_4 gas collected at the same time reacts with the ice in the ice packed bed and is hydrolyzed to produce UO_2F_2 liquid and HF gas.
O_2F_2 liquid is added to UO_2F from the bottom of the hydrolysis column.
_2 A method for recovering uranium hexafluoride, characterized by dropping the uranium hexafluoride into a storage tank, and HF gas is sucked from the top of a hydrolysis column and sent to exhaust equipment via an alkaline scrubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21895486A JPH085674B2 (en) | 1986-09-17 | 1986-09-17 | Uranium hexafluoride recovery and hydrolysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21895486A JPH085674B2 (en) | 1986-09-17 | 1986-09-17 | Uranium hexafluoride recovery and hydrolysis method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6374918A true JPS6374918A (en) | 1988-04-05 |
| JPH085674B2 JPH085674B2 (en) | 1996-01-24 |
Family
ID=16727939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21895486A Expired - Lifetime JPH085674B2 (en) | 1986-09-17 | 1986-09-17 | Uranium hexafluoride recovery and hydrolysis method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085674B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134520A (en) * | 1986-11-25 | 1988-06-07 | Mitsubishi Nuclear Fuel Co Ltd | Continuous hydrolysis of uranium hexafluoride |
| US5284605A (en) * | 1991-03-27 | 1994-02-08 | Comurhex Society Pour La Conversion | Method of treating gas based on electrolytic fluorine containing uranium compounds |
-
1986
- 1986-09-17 JP JP21895486A patent/JPH085674B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63134520A (en) * | 1986-11-25 | 1988-06-07 | Mitsubishi Nuclear Fuel Co Ltd | Continuous hydrolysis of uranium hexafluoride |
| US5284605A (en) * | 1991-03-27 | 1994-02-08 | Comurhex Society Pour La Conversion | Method of treating gas based on electrolytic fluorine containing uranium compounds |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH085674B2 (en) | 1996-01-24 |
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