JPS6118160B2 - - Google Patents
Info
- Publication number
- JPS6118160B2 JPS6118160B2 JP12983579A JP12983579A JPS6118160B2 JP S6118160 B2 JPS6118160 B2 JP S6118160B2 JP 12983579 A JP12983579 A JP 12983579A JP 12983579 A JP12983579 A JP 12983579A JP S6118160 B2 JPS6118160 B2 JP S6118160B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- dryer
- hardness
- scraping
- thin film
- 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
- 238000007790 scraping Methods 0.000 claims description 20
- 239000010409 thin film Substances 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 11
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 8
- 239000000843 powder Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000010808 liquid waste Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Description
【発明の詳細な説明】
この発明は原子力施設から排出される放射性廃
棄物を乾燥処理する薄膜掻取り乾燥機に係り、特
にその攬拌用ブレードの改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thin film scraping dryer for drying radioactive waste discharged from nuclear facilities, and particularly to improvements in its stirring blade.
近時一般化学用のものを改造した薄膜掻取り乾
燥機は、構造が気密で洩れがなく。内部の掃除が
容易であるなどの利点を有するため、放射性液体
廃棄物の乾燥処理に広く使用されている。 The thin film scraping dryer, which was recently modified from one used for general chemistry, has an airtight structure and no leaks. Because it has advantages such as easy internal cleaning, it is widely used for drying radioactive liquid waste.
薄膜掻取り乾燥機は一般に立て型であつてその
構造は第１図に示すように頂部に設けたモータ１
により駆動されるロータ２は周辺に特殊設計のブ
レード３が多数取付けられ、ロータ２と同心の内
壁４内を回転する。 Thin film scraping dryers are generally vertical type, and their structure is as shown in Figure 1, with a motor 1 installed at the top.
A rotor 2 driven by a rotor 2 has a large number of specially designed blades 3 attached around its periphery, and rotates within an inner wall 4 concentric with the rotor 2.
内壁４と同心の乾燥機胴部５との間は蒸気ジヤ
ケツト６を形成し、加熱蒸気が上方の蒸気入口７
からジヤケツト６に入り下方の蒸気出口８から出
るようになつている。 A steam jacket 6 is formed between the inner wall 4 and the concentric dryer body 5, and heated steam is passed through the upper steam inlet 7.
The steam enters the jacket 6 from above and exits from the lower steam outlet 8.
液体廃棄物は乾燥機上部の入口９から給液分配
部１１に入り乾燥機胴部１２内で順次、加熱、蒸
気および乾燥の過程をへて下方へ流れ、内壁４と
ブレード３が形成する狭に隙間１３を通る間にブ
レード３の遠心力により廃液は内壁４の伝熱面に
薄膜状に展開しながら加熱されて、乾燥された粉
体はスカート部１４からホツパー１５へ下降し、
廃液中の水分は蒸気となり出口１０へ上昇し取出
される。 The liquid waste enters the liquid supply distribution section 11 from the inlet 9 at the top of the dryer, passes through heating, steam and drying processes in the dryer body 12, and flows downward, passing through the narrow space formed by the inner wall 4 and the blades 3. While passing through the gap 13, the waste liquid is heated by the centrifugal force of the blade 3 while being spread into a thin film on the heat transfer surface of the inner wall 4, and the dried powder descends from the skirt portion 14 to the hopper 15.
Moisture in the waste liquid becomes steam and rises to the outlet 10 to be taken out.
原子力発電所で発生する廃液は種々の化合物を
含むが、その中のたとえばα―Fe2O3はビツカー
ス硬度が約500Hvの大きい値を示し、またCaCO3
はビツカース硬度が約140Hvであるのに対して従
来の薄膜掻取り乾燥機のブレード３はSUS316L
ステンレス鋼でそのビツカース硬度は約150Hvで
あるため、耐食性は十分で前記粉体に対して耐摩
耗性が十分ではない。 The waste fluid generated at nuclear power plants contains various compounds, among which α-Fe 2 O 3 has a large Vickers hardness of about 500 Hv, and CaCO 3
has a Bitkers hardness of approximately 140Hv, whereas the blade 3 of the conventional thin film scraping dryer is SUS316L.
Since it is stainless steel and has a Vickers hardness of about 150 Hv, it has sufficient corrosion resistance but does not have sufficient wear resistance against the powder.
また従来ブレード３の前縁部分にニツケルクロ
ーム系自溶性合金（コルモノイ）を溶着して刃先
の硬度を多少高めたものもあるが、コルモノイの
ブレード（Hv）は約600程度で前記粉体の硬度と
大差がなく、この場合も粉体に対して耐摩耗性は
十分でない。 In addition, some conventional blades 3 have a self-fusing alloy (Kolmonoy) welded to the leading edge of the blade to increase the hardness of the cutting edge to some extent, but the Kolmonoy blade (Hv) is about 600, which is the hardness of the powder. There is not much difference between the two, and in this case as well, the abrasion resistance against powder is not sufficient.
薄膜掻取り乾燥機の内壁４に析出した廃液中の
前記化合物とブレード３の刃先は相対速度約12
m/secの高速でこすり合うためブレードの刃は粉
体により摩耗し乾燥処理能力は低下するほか、ブ
レードの交換を頻繁に行なう必要がある。 The relative velocity between the compound in the waste liquid deposited on the inner wall 4 of the thin film scraping dryer and the cutting edge of the blade 3 is approximately 12
As the blades rub against each other at high speeds of m/sec, the blades are worn away by the powder, reducing drying performance and requiring frequent blade replacement.
しかし、乾燥機内部は廃液の放射能によつて汚
染されているためその交換修理は容易ではない。 However, since the inside of the dryer is contaminated by radioactivity from the waste liquid, it is not easy to replace or repair it.
本発明の目的は薄膜掻取り乾燥機のブレード刃
の摩耗を低減してその耐用時間を延長し乾燥機の
処理容量の低下を防止する掻取り用ブレードを提
供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a scraping blade that reduces the wear of the blade blade of a thin film scraping dryer, extends its service life, and prevents a decrease in the throughput capacity of the dryer.
すなわち、この発明の要旨は薄膜掻取り乾燥機
の掻取り用ブレードにおいて、刃先を構成する前
縁部分にタングステンカーバイト系超硬合金（ビ
ツカース硬度Hv1500〜2000）等の被処理体の２
倍以上のビツカース硬度を有する合金をねじ止め
によつて取付けて、刃先の硬度を高め耐摩耗性を
向上させることによつてブレードの耐用時間を延
長させることである。 That is, the gist of the present invention is to provide a scraping blade for a thin film scraping dryer, in which the front edge portion constituting the cutting edge is made of a material to be treated, such as tungsten carbide cemented carbide (Vitkers hardness Hv1500-2000).
The purpose is to extend the service life of the blade by attaching an alloy with a Vickers hardness that is twice as hard as the Vickers hardness by screwing, increasing the hardness of the cutting edge and improving wear resistance.
以下、第２図および第３図の従来例と対比しな
がら第４図から第５図を参照して本発明に係る実
施例を説明する。 Hereinafter, an embodiment according to the present invention will be described with reference to FIGS. 4 and 5 while comparing it with the conventional example shown in FIGS. 2 and 3.
第２図と第３図はそれぞれ従来使用されている
掻取り用ブレード３の正面図と平面図である。図
においてブレード３の本体１６の前縁１７は刃先
を形成し、後縁にはこのブレード３をローター２
（第１図）に取付け、結合するためのピンを入れ
るピン孔１８を有する取付具１９が形成されてい
る。 2 and 3 are a front view and a plan view, respectively, of a conventionally used scraping blade 3. FIG. In the figure, the leading edge 17 of the main body 16 of the blade 3 forms a cutting edge, and the trailing edge connects this blade 3 to the rotor 2.
A fitting 19 is formed having a pin hole 18 into which a pin is inserted for attachment and connection (FIG. 1).
ブレード３の材質はSUS316Lステンレス鋼で
ある。 The material of the blade 3 is SUS316L stainless steel.
第４図に示すようにブレード３の前縁部分１７
にタングステンカーバイト超硬合金のチツプ２１
を抑え金具２２およびねじ２３によつて取付けて
所要の刃を形成する。 The leading edge portion 17 of the blade 3 as shown in FIG.
Tungsten carbide cemented carbide chip 21
is attached by holding the metal fittings 22 and screws 23 to form the required blade.
ここで、掻取り用ブレードの刃先材料としてタ
ングステンカーバイト系超硬合金を採用したのは
次の理由による。 Here, the reason why tungsten carbide cemented carbide was adopted as the cutting edge material of the scraping blade is as follows.
一般に材料の硬さと粉体の硬さの比が摩耗量に
およぼす影響は第５図に示すようになり、粉体よ
り材料が多少硬くても材料は容易に摩耗してしま
う。従つてニツケルクローム系自溶性合金（コル
モノイ）程度の硬さのものを刃先に溶着しても前
記粉体に対しては容易に摩耗する。 In general, the effect that the ratio of the hardness of the material to the hardness of the powder has on the amount of wear is shown in FIG. 5, and even if the material is somewhat harder than the powder, the material will wear easily. Therefore, even if something as hard as a nickel-chromium self-fusing alloy (Colmonoy) is welded to the cutting edge, it will easily wear against the powder.
さらに第６図より材料の硬さが粉体の硬さより
２〜３倍硬くなると摩耗量は急激に減少すること
がわかる。そこで粉体（α―Fe2O3）の硬度
Hv500に対して、タングステンカーバイト系超硬
合金の硬度はHv1500〜2000であり、粉体より３
〜４倍硬いため、ブレード３の刃先材料（チツプ
２０またはチツブ２１）としてタングステンカー
バイト系超硬合金を用いれば極端に摩耗量を減少
させることが出来る。 Furthermore, it can be seen from FIG. 6 that when the hardness of the material becomes 2 to 3 times harder than the hardness of the powder, the amount of wear decreases rapidly. Therefore, the hardness of the powder (α-Fe 2 O 3 )
Compared to Hv500, the hardness of tungsten carbide cemented carbide is Hv1500-2000, which is 3 times higher than that of powder.
Since it is ~4 times harder, if tungsten carbide cemented carbide is used as the cutting edge material (chip 20 or chip 21) of the blade 3, the amount of wear can be extremely reduced.
また本願においては耐摩耗性合金を刃先にねじ
止めて取付けているので溶接とか溶射にて取付け
る場合のように加熱されることが無い。従つて応
力腐食割れ等の原因をなくすることができると言
う優れた効果を奏する。また刃先が偏つて摩耗し
たり、あるいは異物のかみ込み等によつて１部が
破損したりした場合には破損部分だけをブレード
本体を取りはずしたりすることなく容易に交換す
ることができる。 Further, in the present application, since the wear-resistant alloy is attached to the cutting edge by screwing, it is not heated unlike when it is attached by welding or thermal spraying. Therefore, it has an excellent effect of eliminating causes of stress corrosion cracking and the like. Furthermore, in the event that the cutting edge wears unevenly or a portion of the blade is damaged due to foreign matter getting caught in it, only the damaged portion can be easily replaced without removing the blade body.
タングステンカーバイト系超硬合金は多少靭性
が乏しい欠点はあるが、ブレード３は乾燥機の内
壁４に析出した粉体を擦りながら掻取つているの
で、ブレード３に作用する衝撃はなく、タングス
テンカーバイト系超硬合金のチツプ２０または２
１は衝撃により割れることはない。 Although tungsten carbide cemented carbide has the disadvantage of somewhat poor toughness, the blade 3 scrapes off the powder deposited on the inner wall 4 of the dryer, so there is no impact acting on the blade 3, and the tungsten carbide Bit type cemented carbide chip 20 or 2
1 will not break due to impact.
以上説明したように本発明による掻取りブレー
ドを使用した薄膜掻取り乾燥機は耐摩耗性が優れ
ているため、寿命が長くかつ処理容量の低下がな
い優れた効果を奏する。 As explained above, the thin film scraping dryer using the scraping blade according to the present invention has excellent abrasion resistance, so it has a long life and has excellent effects without a decrease in processing capacity.
第１図は薄膜掻取り乾燥機の断面図、第２図お
よび第３図は従来の掻取り用ブレードをそれぞれ
示す正面図および側面図、第４図は本発明に係る
掻取り用ブレードの一実施例を示す側面図、第５
図は材料の硬さと粉体の硬さの比が摩耗量におよ
ぼす影響を示すグラフである。
１…モータ、２…ロータ、３…ブレード、４…
内壁、５…胴部、６…ジヤケツト、７…加熱用蒸
気入口、８…加熱用蒸気出口、９…給液入口、１
０…蒸気出口、１１…給液分配部、１２…乾燥胴
部、１３…隙間、１４…スカート部、１５…ホツ
パー、１６…本体、１７…前縁、１８…ピン孔、
１９…取付具、２０…チツプ、２１…チツプ、２
２…抑え金具、２３…ねじ。
FIG. 1 is a cross-sectional view of a thin film scraping dryer, FIGS. 2 and 3 are front and side views respectively showing a conventional scraping blade, and FIG. 4 is an illustration of a scraping blade according to the present invention. Side view showing the embodiment, No. 5
The figure is a graph showing the influence of the ratio of material hardness to powder hardness on the amount of wear. 1...Motor, 2...Rotor, 3...Blade, 4...
Inner wall, 5... Body, 6... Jacket, 7... Steam inlet for heating, 8... Steam outlet for heating, 9... Liquid supply inlet, 1
0... Steam outlet, 11... Liquid supply distribution part, 12... Drying body, 13... Gap, 14... Skirt part, 15... Hopper, 16... Main body, 17... Front edge, 18... Pin hole,
19... Mounting tool, 20... Chip, 21... Chip, 2
2... Holder, 23... Screw.
Claims (1)
付けられた薄膜掻取り乾燥機の掻取り用ブレード
において、刃先を構成する前縁部分にタングステ
ンカーバイト系超硬合金をねじにより取付けて刃
先としてなることを特徴とする薄膜掻取り乾燥機
の掻取り用ブレード。1. In the scraping blade of a thin film scraping dryer that is rotatably attached to the periphery of the rotor that is driven to rotate, a tungsten carbide-based cemented carbide is attached with a screw to the leading edge that forms the cutting edge. A scraping blade for a thin film scraping dryer characterized by:
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12983579A JPS5654397A (en) | 1979-10-11 | 1979-10-11 | Blade for film scratchinggoff dryer |
| FR8021430A FR2467469B1 (en) | 1979-10-11 | 1980-10-07 | SCRAPING BLADE, FOR USE IN THIN LAYER DRYERS |
| DE3037875A DE3037875C2 (en) | 1979-10-11 | 1980-10-07 | Scraper sheet for a thin film dryer |
| SE8007099A SE8007099L (en) | 1979-10-11 | 1980-10-10 | SCRAP SHEET IN A THIN MOVIE TYPE DRY |
| US06/396,398 US4447293A (en) | 1979-10-11 | 1982-07-08 | Scraping blades for use in thin film dryers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12983579A JPS5654397A (en) | 1979-10-11 | 1979-10-11 | Blade for film scratchinggoff dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5654397A JPS5654397A (en) | 1981-05-14 |
| JPS6118160B2 true JPS6118160B2 (en) | 1986-05-10 |
Family
ID=15019398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12983579A Granted JPS5654397A (en) | 1979-10-11 | 1979-10-11 | Blade for film scratchinggoff dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5654397A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0217149U (en) * | 1988-07-20 | 1990-02-05 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109745771A (en) * | 2017-11-07 | 2019-05-14 | 丹阳市日晟工业设备有限公司 | A kind of high-efficiency heating centrifugal dehumidifier |
| CN109713273A (en) * | 2018-12-27 | 2019-05-03 | 洛阳月星新能源科技有限公司 | A kind of fast charging type porous block graphite cathode material and preparation method thereof |
-
1979
- 1979-10-11 JP JP12983579A patent/JPS5654397A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0217149U (en) * | 1988-07-20 | 1990-02-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5654397A (en) | 1981-05-14 |
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