JPH0254122B2 - - Google Patents
Info
- Publication number
- JPH0254122B2 JPH0254122B2 JP59133550A JP13355084A JPH0254122B2 JP H0254122 B2 JPH0254122 B2 JP H0254122B2 JP 59133550 A JP59133550 A JP 59133550A JP 13355084 A JP13355084 A JP 13355084A JP H0254122 B2 JPH0254122 B2 JP H0254122B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- heating device
- spherical
- spherical bodies
- type dryer
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- 239000011344 liquid material Substances 0.000 description 8
- 239000002901 radioactive waste Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000010857 liquid radioactive waste Substances 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/14—Processing by incineration; by calcination, e.g. desiccation
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Drying Of Solid Materials (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は液体、スラリーなどの液状物を加熱
乾燥させて粉体化するボール型乾燥機に関し、特
に原子力発電所等の放射性物質取扱施設から発生
する液状の放射性廃棄物を粉体化するのに最適な
ボール型乾燥機に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a ball-type dryer that heats and dries liquids such as liquids and slurries to turn them into powder. This invention relates to a ball-type dryer that is ideal for pulverizing liquid radioactive waste that is generated.
（従来の技術）
原子力発電所等の放射性物質取扱施設において
発生する放射性廃液、廃樹脂、廃スラツジなどの
液体あるいはスラリー状の放射性廃棄物は、濃縮
あるいは脱水後セメントと混合してドラム缶内で
固化させて施設内に貯蔵するのが一般的であり、
さらに外熱式の遠心薄膜乾燥機により粉体化後プ
ラスチツクス等と混合固化させる試みもなされて
いる。しかし前者の方法は減溶性が劣り、後者の
方法は高速回転する乾燥機の故障が多いうえ間接
加熱であるため処理容量が小さい等の欠点があつ
た。そこで出願人はこれらの欠点を解消するもの
として容器状の本体の内部に多数の孔を有する支
持板を設け、この支持板上に堆積させた球状体を
撹拌翼により転動させ、この球状体に沿つて下降
する液状物を加熱乾燥して粉体化する方法および
装置（ボール型乾燥機）を、特願昭58−159388号
および特願昭59−44724号により提案している。(Prior technology) Liquid or slurry radioactive waste, such as radioactive liquid waste, waste resin, and waste sludge, generated in nuclear power plants and other facilities that handle radioactive materials is concentrated or dehydrated, then mixed with cement and solidified in drums. It is common to store them inside the facility.
Furthermore, attempts have been made to mix and solidify the powder with plastics and the like using an externally heated centrifugal thin film dryer. However, the former method has poor solubility reduction properties, and the latter method has drawbacks such as frequent failures of the dryer, which rotates at high speed, and a small processing capacity due to indirect heating. Therefore, in order to solve these drawbacks, the applicant provided a support plate with a large number of holes inside the container-shaped main body, and rolled the spherical bodies deposited on this support plate with stirring blades. Japanese Patent Application No. 58-159388 and No. 59-44724 propose a method and apparatus (ball type dryer) for heating and drying a liquid material descending along the direction of the ball to powder it.
（発明が解決しようとする問題点）
ところが上記ボール型乾燥機においては、液状
物の加熱乾燥を熱風発生装置の発生する熱風また
は単一の誘導加熱コイルを用いた高周波誘導加熱
によりおこなつているため、球状体の堆積層の温
度を上下方向にわたつて所望の温度分布とするこ
とができない。このため乾燥機の稼動開始時には
球状体の堆積層が全体に高温度に予熱されている
ため、球状体がセラミツク質から成る場合は液状
物との温度差の大きい上部の球状体に割れが発生
する。また稼動中においても、液状物の処理量、
粉体化成分含有量、温度等に応じて上部〜下部の
球状体の温度を液状物粉体化に最適の温度に調節
できず、過熱状態となり投入加熱エネルギの浪費
を招いたり、乾燥不充分で水分の多い粉体が生成
されて支持プレートの目詰り事故を生じるという
問題がある。(Problems to be Solved by the Invention) However, in the above-mentioned ball-type dryer, the liquid material is heated and dried using hot air generated by a hot air generator or high-frequency induction heating using a single induction heating coil. Therefore, the temperature of the deposited layer of spherical bodies cannot be made to have a desired temperature distribution in the vertical direction. For this reason, when the dryer starts operating, the entire deposited layer of spherical bodies is preheated to a high temperature, so if the spherical bodies are made of ceramic, cracks occur in the upper spherical bodies where there is a large temperature difference from the liquid material. do. Also, even during operation, the amount of liquid processed,
Depending on the content of powdered ingredients, temperature, etc., the temperature of the upper to lower spherical bodies cannot be adjusted to the optimum temperature for powdering the liquid, resulting in overheating, resulting in wasted input heating energy, and insufficient drying. There is a problem in that powder with a high moisture content is generated and the support plate becomes clogged.
この発明は上記従来の問題点を解決するもの
で、球状体の急冷による割れを防止でき、適正な
投入電力により含有水分の少ない粉体を得ること
ができ、支持プレートの目詰りが防止されるボー
ル型乾燥機を提供しようとするものである。 This invention solves the above-mentioned conventional problems, and can prevent cracking of spherical bodies due to rapid cooling, can obtain powder with low moisture content by applying appropriate power, and can prevent clogging of support plates. The purpose is to provide a ball-type dryer.
（問題点を解決するための手段）
この発明のボール型乾燥機は、上部に液状物供
給口を、下部に粉体取出口をそなえた容器状の本
体の内部に粉体が通過可能な支持プレートを設
け、上記支持プレート上に多数個の球状体を堆積
させ、上記球状体を転動させる撹拌翼を有する撹
拌装置をそなえたボール型乾燥機であつて、上記
本体の胴部に沿つて上記球状体を加熱する加熱装
置を設けるとともに、上記加熱装置を上下に複数
ゾーンに分割し、上記各ゾーンごとに上記球状体
の加熱量を調節できるようにしたことを特徴とす
るボール型乾燥機である。(Means for Solving the Problems) The ball dryer of the present invention has a container-like main body having a liquid supply port at the top and a powder outlet at the bottom, and a support that allows powder to pass through. A ball-type dryer comprising a plate, a plurality of spherical bodies deposited on the support plate, and a stirring device having stirring blades for rolling the spherical bodies, the ball dryer having a stirring device having a stirring blade for rolling the spherical bodies, the ball dryer having a stirring device having a stirring blade for rolling the spherical bodies, the ball dryer having a stirring device having a stirring blade for rolling the spherical bodies. A ball dryer characterized in that a heating device for heating the spherical body is provided, the heating device is divided into a plurality of zones vertically, and the amount of heating of the spherical body can be adjusted for each zone. It is.
（作用）
この発明のボール型乾燥機においては、上下に
複数ゾーンに分割された加熱装置により、上記各
ゾーンに対応する球状体をそれぞれ所望の加熱温
度に加熱することができる。(Function) In the ball type dryer of the present invention, the spherical bodies corresponding to each zone can be heated to a desired heating temperature by the heating device which is divided into a plurality of upper and lower zones.
（実施例）
以下第１図によりこの発明の一実施例を説明す
る。(Embodiment) An embodiment of the present invention will be described below with reference to FIG.
図において１はボール型乾燥機で、ステンレス
等から成る容器状の本体２の内部にはステンレス
等から成る支持プレート３が固定されている。こ
の支持プレート３は粉体が通過可能な多数の穴あ
るいはスリツトをそなえた穴あき板やロストル等
から成る。支持プレート３上には望ましくはセラ
ミツク質から成る球状体４が多数個堆積させてあ
り、この球状体４は回転駆動機構５により駆動さ
れる鉛直な回転軸６に撹拌翼７を固着して成る撹
拌装置８により連続撹拌される機構となつてい
る。球状体４の堆積層の上方には、ノズルをそな
えた液状物供給口９が本体２に取付けられてい
る。一方本体２の胴部２ａの外周部には抵抗加熱
装置１０が設けてあり、この抵抗加熱装置１０は
上部から第１ゾーン１１、第２ゾーン１２、第３
ゾーン１３の３個のゾーンに分割され、各ゾーン
はそれぞれ別個の電流または電圧調節装置（図示
しない）を経て電源に接続されている。１４は本
体２の下部に設けた粉体取出口、１５は支持プレ
ート３の下方の本体２に設けた吸気口、１６は本
体２の上部に設けた排気口で、この排気口１６に
は復水器１７、除塵機１８および排風機１９が接
続されている。また液状物供給口９にはタンク２
０内の液状物２１を送給するポンプ２２が接続さ
れている。 In the figure, reference numeral 1 denotes a ball-type dryer, in which a support plate 3 made of stainless steel or the like is fixed inside a container-shaped main body 2 made of stainless steel or the like. The support plate 3 is made of a perforated plate, a rotor, etc., provided with a large number of holes or slits through which the powder can pass. A large number of spherical bodies 4, preferably made of ceramic, are deposited on the support plate 3, and the spherical bodies 4 are formed by fixing stirring blades 7 to a vertical rotating shaft 6 driven by a rotational drive mechanism 5. It has a mechanism in which it is continuously stirred by a stirring device 8. Above the deposited layer of spherical bodies 4, a liquid supply port 9 equipped with a nozzle is attached to the main body 2. On the other hand, a resistance heating device 10 is provided on the outer periphery of the body portion 2a of the main body 2, and this resistance heating device 10 is arranged in a first zone 11, a second zone 12, a third zone from the top.
It is divided into three zones, zone 13, each connected to a power supply via a separate current or voltage regulator (not shown). 14 is a powder outlet provided at the bottom of the main body 2, 15 is an intake port provided in the main body 2 below the support plate 3, and 16 is an exhaust port provided at the top of the main body 2. A water dispenser 17, a dust remover 18, and an exhaust fan 19 are connected. In addition, the liquid supply port 9 has a tank 2.
A pump 22 is connected to supply the liquid material 21 inside the container.
上記構成の装置においては、放射性廃液、濃縮
廃液、廃スラツジのスラリー等の放射性廃棄物か
ら成る液状物２１は、液状物供給口９から球状体
４の堆積層上に供給され、抵抗加熱装置１０によ
り加熱された球状体４の表面に沿つて流れ落ち、
加熱乾燥されて粉体２３となつて支持プレート３
を通過して下方へ落下する。このとき抵抗加熱装
置１０には、第１ゾーン１１〜第３ゾーン１３の
各ゾーンに異なる電流または電圧を与え、ボール
型乾燥機１の稼動開始時および稼動中において
も、各ゾーンに対応する上部、中部、下部の球状
体４が異なる加熱温度に維持されるようにする。
この加熱温度は、装置のテストラン等により液状
物２１の処理量、粉体化成分含有量、温度等に応
じて、粉体２３の含有水分が少なくかつ投入電力
が少ない加熱条件を見出して設定するものである
が、発明者の実験例によると上部の球状体４を
100〜200℃の低温、中部の球状体４を200〜300℃
の中温、下部の球状体４を300〜400℃の高温とす
ると一般に好結果が得られた。この場合上部の球
状体４は液状物２１との温度差が少ないのでセラ
ミツク質のものであつても割れを生じにくいし、
下部の球状体４は高温であるため粉体２３の乾燥
が充分におこなわれ、また400℃以下であれば放
射性物質の処理実績のある耐熱性材料が比較的多
く、各部構成材料の選定が容易である。 In the apparatus configured as described above, the liquid material 21 consisting of radioactive waste such as radioactive waste liquid, concentrated waste liquid, slurry of waste sludge, etc. is supplied from the liquid material supply port 9 onto the deposited layer of the spherical bodies 4, and the resistance heating device 10 flows down along the surface of the spherical body 4 heated by
The support plate 3 is heated and dried to become a powder 23.
It passes through and falls downward. At this time, a different current or voltage is applied to each of the first zone 11 to third zone 13 in the resistance heating device 10, and even when the ball dryer 1 starts operating and is in operation, the upper part corresponding to each zone is , middle, and lower spherical bodies 4 are maintained at different heating temperatures.
This heating temperature is set by finding heating conditions in which the powder 23 contains less moisture and requires less power input, depending on the processing amount of the liquid material 21, the content of powdered components, the temperature, etc., through a test run of the device, etc. However, according to the inventor's experimental example, the upper spherical body 4 is
Low temperature of 100 to 200℃, middle spherical body 4 to 200 to 300℃
Good results were generally obtained when the lower spherical body 4 was heated to a high temperature of 300 to 400°C. In this case, the temperature difference between the upper spherical body 4 and the liquid substance 21 is small, so even if it is made of ceramic, it is difficult to crack.
Since the temperature of the lower spherical body 4 is high, the powder 23 is sufficiently dried, and if the temperature is below 400°C, there are relatively many heat-resistant materials that have a proven track record of treating radioactive substances, making it easy to select materials for each part. It is.
なお液状物２１の乾燥により蒸発した水分は本
体２の吸気口１５から吸入された除湿用空気とと
もに排気口１６から流出し、水分は復水器１７に
より凝縮されて回収され、脱湿された空気は除塵
機１８により除塵後排風機１９により大気中へ放
出される。 The moisture evaporated due to drying of the liquid material 21 flows out from the exhaust port 16 together with the dehumidifying air taken in from the intake port 15 of the main body 2, and the moisture is condensed and collected by the condenser 17, and the dehumidified air is is removed by the dust remover 18 and then discharged into the atmosphere by the exhaust fan 19.
この発明は上記実施例に限定されるものではな
く、たとえば球状体４の加熱装置としては高周波
誘導加熱装置を用いてもよく、この場合は球状体
４をステンレス球などの球状導電体、本体２の胴
部２ａを非導電体で構成するのが望ましい。また
球状体４の加熱装置は上下に２ゾーンあるいは４
ゾーン以上の複数ゾーンに分割してもよい。 The present invention is not limited to the above embodiments, and for example, a high frequency induction heating device may be used as the heating device for the spherical body 4. In this case, the spherical body 4 may be a spherical conductor such as a stainless steel sphere, and the main body 2 may be heated by a high frequency induction heating device. It is preferable that the body portion 2a is made of a non-conductive material. In addition, the heating device for the spherical body 4 has two zones or four zones above and below.
It may be divided into multiple zones or more.
（発明の効果）
以上説明したようにこの発明によれば、支持プ
レートに堆積された球状体は加熱装置の各ゾーン
に対応して上下方向に所望の温度分布となるよう
加熱することができ、球状体の急冷による割れを
防止できるとともに、適正な投入電力により含有
水分の少ない乾燥粉体を得ることができ、これに
よつて支持プレートの目詰りも防止され、特に放
射性放棄物の処理装置として用いれば長時間の連
続運転に耐え保守の手間がかからないため被曝の
低減化を達成できる有用なボール型乾燥機が提供
される。(Effects of the Invention) As explained above, according to the present invention, the spherical bodies deposited on the support plate can be heated to a desired temperature distribution in the vertical direction corresponding to each zone of the heating device, It is possible to prevent the spherical bodies from cracking due to rapid cooling, and it is also possible to obtain dry powder with low moisture content by applying appropriate power, which also prevents clogging of the support plate, making it particularly useful as a treatment device for radioactive waste. If used, a useful ball-type dryer can be provided that can withstand long-term continuous operation and requires no maintenance, thereby reducing radiation exposure.
第１図はこの発明の一実施例を示すボール型乾
燥機の縦断面図である。
１……ボール型乾燥機、２……本体、２ａ……
胴部、３……支持プレート、４……球状体、７…
…撹拌翼、８……撹拌装置、９……液状物供給
口、１０……抵抗加熱装置、１１……第１ゾー
ン、１２……第２ゾーン、１３……第３ゾーン、
１４……粉体取出口。
FIG. 1 is a longitudinal cross-sectional view of a ball-type dryer showing an embodiment of the present invention. 1...Ball type dryer, 2...Main body, 2a...
Body, 3... Support plate, 4... Spherical body, 7...
... Stirring blade, 8 ... Stirring device, 9 ... Liquid supply port, 10 ... Resistance heating device, 11 ... First zone, 12 ... Second zone, 13 ... Third zone,
14...Powder outlet.
Claims (1)
そなえた容器状の本体の内部に粉体が通過可能な
支持プレートを設け、上記支持プレート上に多数
個の球状体を堆積させ、上記球状体を転動させる
撹拌翼を有する撹拌装置をそなえたボール型乾燥
機であつて、上記本体の胴部に沿つて上記球状体
を加熱する加熱装置を設けるとともに、上記加熱
装置を上下に複数ゾーンに分割し、上記各ゾーン
ごとに上記球状体の加熱量を調節できるようにし
たことを特徴とするボール型乾燥機。 ２ 球状体がセラミツク質から成り、加熱装置が
抵抗加熱装置である特許請求の範囲第１項記載の
ボール型乾燥機。 ３ 球状体が球状導電体から成り、加熱装置が高
周波誘導加熱装置である特許請求の範囲第１項記
載のボール型乾燥機。[Scope of Claims] 1. A support plate through which powder can pass is provided inside a container-shaped main body having a liquid supply port at the top and a powder outlet at the bottom, and a large number of powders are placed on the support plate. A ball type dryer equipped with a stirring device having stirring blades for depositing spherical bodies and rolling the spherical bodies, the ball dryer having a heating device for heating the spherical bodies along the trunk of the main body, A ball-type dryer characterized in that the heating device is divided into a plurality of zones vertically, and the amount of heating of the spherical body can be adjusted for each zone. 2. The ball-type dryer according to claim 1, wherein the spherical bodies are made of ceramic and the heating device is a resistance heating device. 3. The ball-type dryer according to claim 1, wherein the spherical body is made of a spherical conductor and the heating device is a high frequency induction heating device.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59133550A JPS6111103A (en) | 1984-06-27 | 1984-06-27 | Ball type dryer |
| US06/707,678 US4609430A (en) | 1984-03-07 | 1985-03-04 | Liquid material drying apparatus |
| KR1019850001431A KR900006012B1 (en) | 1984-06-27 | 1985-03-06 | Liquid material drying apparatus |
| EP85301584A EP0156562B1 (en) | 1984-03-07 | 1985-03-07 | Liquid material drying method and apparatus |
| DE8585301584T DE3579606D1 (en) | 1984-03-07 | 1985-03-07 | METHOD AND DEVICE FOR DRYING A LIQUID MATERIAL. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59133550A JPS6111103A (en) | 1984-06-27 | 1984-06-27 | Ball type dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6111103A JPS6111103A (en) | 1986-01-18 |
| JPH0254122B2 true JPH0254122B2 (en) | 1990-11-20 |
Family
ID=15107432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59133550A Granted JPS6111103A (en) | 1984-03-07 | 1984-06-27 | Ball type dryer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6111103A (en) |
| KR (1) | KR900006012B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0775702B2 (en) * | 1989-11-24 | 1995-08-16 | 株式会社彦間製作所 | Human waste drying equipment |
| JP5172123B2 (en) * | 2006-09-27 | 2013-03-27 | パナソニック株式会社 | Battery can manufacturing method |
-
1984
- 1984-06-27 JP JP59133550A patent/JPS6111103A/en active Granted
-
1985
- 1985-03-06 KR KR1019850001431A patent/KR900006012B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR860000664A (en) | 1986-01-30 |
| JPS6111103A (en) | 1986-01-18 |
| KR900006012B1 (en) | 1990-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |