JPH0761612B2 - Cleaning method of turbine for power generation of boiling water nuclear power plant - Google Patents
Cleaning method of turbine for power generation of boiling water nuclear power plantInfo
- Publication number
- JPH0761612B2 JPH0761612B2 JP63293474A JP29347488A JPH0761612B2 JP H0761612 B2 JPH0761612 B2 JP H0761612B2 JP 63293474 A JP63293474 A JP 63293474A JP 29347488 A JP29347488 A JP 29347488A JP H0761612 B2 JPH0761612 B2 JP H0761612B2
- Authority
- JP
- Japan
- Prior art keywords
- turbine
- powder
- power generation
- boiling water
- water nuclear
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/002—Cleaning of turbomachines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ブラスト法により沸騰水型原子力発電設備の
発電用タービンを清浄にする方法に関する。TECHNICAL FIELD The present invention relates to a method for cleaning a power generation turbine of a boiling water nuclear power plant by a blast method.
従来の技術 原子力発電所においては、核分裂によって発生した熱エ
ネルギーは一次冷却水によって炉心から取出され蒸気プ
ラントにおいて電気エネルギーに変換される。沸騰水型
原子力発電設備では、一次冷却水は炉心を上昇する間に
燃料から受ける熱によって沸騰し、炉心上部に設置され
た気水分離器によって蒸気と水に分離された後、蒸気は
直接発電用タービンに蒸気パイプを通じて送られる。こ
の結果、発電用タービンに汚れが付着するために、ター
ビンを１〜２年に１回洗浄し付着物質を除去する必要が
ある。従来、この洗浄は焼結アルミナを研磨材として使
用し研磨材を空気流でタービンの表面に吹き付ける乾式
ブラスト法によりなされている。１回のタービン洗浄に
使用される研磨材は３乃至６トンにも及ぶ。2. Description of the Related Art In a nuclear power plant, thermal energy generated by nuclear fission is extracted from the core by primary cooling water and converted into electric energy in a steam plant. In boiling water nuclear power generation equipment, the primary cooling water is boiled by the heat received from the fuel while rising in the core, and is separated into steam and water by a steam separator installed above the core, and then steam is directly generated. Sent to steam turbines through steam pipes. As a result, dirt adheres to the turbine for power generation, and therefore it is necessary to wash the turbine once every one to two years to remove adhered substances. Conventionally, this cleaning is performed by a dry blast method in which sintered alumina is used as an abrasive and the abrasive is blown onto the surface of the turbine with an air flow. Abrasives used in a single turbine wash can amount to 3 to 6 tonnes.
発明が解決しようとする問題点 研磨材として焼結アルミナを使用した場合、タービン表
面が摩耗されやすいという問題がある。また、洗浄に使
用した後の研磨材は管理区域から搬出することができ
ず、コンクリート詰めにして保管しなければならないた
め、広い保管場所を必要とするといった問題もある。Problems to be Solved by the Invention When using sintered alumina as an abrasive, there is a problem that the turbine surface is easily worn. In addition, since the abrasive after being used for cleaning cannot be carried out from the controlled area and must be packed in concrete for storage, a large storage space is required.
本発明は、従来使用されてきたブラスト法の有する上記
の問題点を解決する新規なタービン表面上の付着物質を
除去する方法を提供することを目的とする。It is an object of the present invention to provide a novel method for removing deposits on the surface of a turbine, which solves the above-mentioned problems of the blasting method used in the past.
本発明は、沸騰水型原子力発電設備の発電用タービンの
表面を摩耗することなくタービンから付着物質を除去す
る方法を提供することを目的とする。It is an object of the present invention to provide a method for removing deposits from a turbine for power generation of a boiling water nuclear power plant without abrading the surface of the turbine.
本発明の他の目的は、付着物質の除去に使用された後に
後処理が可能な粉体を使用して、付着物質の除去を行う
方法を提供することである。Another object of the present invention is to provide a method for removing adhered substances using a powder that can be post-treated after being used for removing adhered substances.
問題点を解決するための手段 本発明は上記の問題点を解決するブラスト法であって、
メラミン樹脂からなる粉体を沸騰水型原子力発電設備の
発電用タービンの表面に気体流と共に吹き付け、該ター
ビンの表面から付着物質を除去する方法である。Means for Solving the Problems The present invention is a blasting method for solving the above problems,
This is a method of spraying powder made of melamine resin onto the surface of a power generation turbine of a boiling water nuclear power generation facility together with a gas flow to remove adhered substances from the surface of the turbine.
メラミン樹脂からなる粉体の粒度は特に限定するもので
はないが、JIS R-6001-1973にて規定される、20乃至120
メッシュであることが好ましい。粉体の粒子形状はいか
なる形状であってもよい。粉体の粒子の硬度は特に限定
するものではないが、モース硬度で３乃至４であること
が好ましい。粉体は硬化したメラミン樹脂の塊、ペレッ
ト等を粉砕機にて粉砕することによって得ることができ
る。The particle size of the melamine resin powder is not particularly limited, but is specified in JIS R-6001-1973, 20 to 120.
It is preferably a mesh. The particle shape of the powder may be any shape. The hardness of the powder particles is not particularly limited, but is preferably 3 to 4 in Mohs hardness. The powder can be obtained by crushing a lump, pellet or the like of the cured melamine resin with a crusher.
粉体を気体流と共に吹き付ける方法は、各種ブラスト法
を用いることができるが、乾式ブラスト法が最適であ
る。乾式ブラスト法には、 （イ）粉体をノズルより高い位置にあるタンクに投入
し、重力によってタンク底部に設けられた排出口に落下
した粉体を圧縮気体と共にノズルから噴射させる重力式
ブラスト法、 （ロ）粉体圧送タンク内に粉体を封入してタンクに圧縮
気体を送り込み、タンク底部に設けられた排出口から排
出した粉体を圧縮気体と共にノズルから噴射させる直圧
式ブラスト法、 （ハ）粉体をノズルより低い位置にあるタンクに投入
し、圧縮気体のサクションによってタンク底部に設けら
れた排出口から排出された粉体を圧縮気体と共にノズル
から噴射させるサイフォン式ブラスト法、 が挙げられるが、これらのブラスト法のいずれも使用す
ることができる。Various blasting methods can be used as the method of spraying the powder with the gas flow, but the dry blasting method is most suitable. The dry blast method is: (a) Gravity blast method in which the powder is put into a tank located higher than the nozzle and the powder is dropped by gravity from the discharge port provided at the bottom of the tank together with the compressed gas from the nozzle. (B) A direct pressure blast method in which powder is enclosed in a powder pressure feed tank, compressed gas is sent to the tank, and the powder discharged from an outlet provided at the bottom of the tank is jetted together with the compressed gas from a nozzle. C) A siphon blast method in which powder is put into a tank lower than the nozzle, and the powder discharged from the outlet provided at the bottom of the tank by the suction of compressed gas is jetted from the nozzle together with the compressed gas. However, any of these blasting methods can be used.
圧縮気体として通常圧縮空気を使用する。通常、その圧
力はゲージ圧３乃至10kg/cm2であり、ノズルからの圧縮
気体の噴射速度は50乃至240m/秒である。また、洗浄に
使用される粉体量、圧縮気体の圧力、噴射速度は、使用
される粉体の特性、付着物質のタービンへの付着状態に
よって、適宜選択することができる。Compressed air is usually used as the compressed gas. Usually, the pressure is 3 to 10 kg / cm 2 and the jet speed of the compressed gas from the nozzle is 50 to 240 m / sec. Further, the amount of powder used for cleaning, the pressure of the compressed gas, and the injection speed can be appropriately selected depending on the characteristics of the powder used and the state of adhesion of adhered substances to the turbine.
付着物質の除去に使用された後の粉体中には付着物質が
存在しており、粉体と付着物質とは不均一な混合物とな
っている。この混合物を燃焼炉で焼却すると、メラミン
樹脂の燃焼後の残滓と付着物質が焼却残として残る。燃
焼炉から排出される排気ガスはフィルター等の適切な排
気ガス処理設備を通して大気中に放出される。メラミン
樹脂粉体の燃焼後の残滓は、燃焼前の樹脂粉体量の高々
数％である。燃焼炉は種々の形式のものを使用できる
が、電気炉が好ましい。付着物質を含む焼却残は、コン
クリート詰め等の適切な処理方法によって処理すること
ができる。The adhering substance is present in the powder after it has been used for removing the adhering substance, and the powder and the adhering substance are a non-uniform mixture. When this mixture is incinerated in a combustion furnace, the residue after burning the melamine resin and adhering substances remain as incineration residue. Exhaust gas discharged from the combustion furnace is discharged into the atmosphere through an appropriate exhaust gas treatment facility such as a filter. The residue after combustion of the melamine resin powder is at most several% of the amount of resin powder before combustion. Although various types of combustion furnaces can be used, an electric furnace is preferable. The incineration residue containing the adhered substance can be treated by an appropriate treatment method such as concrete filling.
熱可塑性樹脂からなる粉体を使用した場合、洗浄に使用
した後の粉体を燃焼炉で焼却すると熱可塑性樹脂が燃焼
炉内で溶解し燃焼炉の底部に固着してしまい、焼却残滓
の燃焼後の処理が極めて困難となる。従って、メラミン
樹脂からなる粉体を使用することが不可欠である。When powder made of thermoplastic resin is used, if the powder after cleaning is incinerated in a combustion furnace, the thermoplastic resin melts in the combustion furnace and sticks to the bottom of the combustion furnace, burning the incineration residue. Subsequent processing becomes extremely difficult. Therefore, it is essential to use a powder made of melamine resin.
以下図面を参照して本発明を実施例により具体的に説明
する。Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.
メラミン樹脂からなる42乃至90メッシュの粒度の粉体を
用いて、沸騰水型原子力発電設備の発電用タービンの表
面に折出し付着した付着物質の除去を行った。除去に
は、直圧式ブラスト装置20を使用した。粉体10をタンク
22中に投入し、圧縮空気源からタンク22および搬送パイ
プ26に圧縮空気を送り込んだ。圧縮空気源からの圧縮空
気の送り量を1Nm3／分、圧力をゲージ圧5kg/cm2とし
た。粉体の使用量を300kg/時とした。タンク22の底部に
設けられた排出口から排出された粉体は、圧縮空気によ
って搬送パイプ中を搬送されノズル24を通つて噴射され
る。ノズル内径を5mmとし、ノズルからの圧縮空気の噴
射速度を150m/秒とし、ノズルからタービンの表面まで
の距離を200乃至800mmに保った。ノズルから噴射された
粉体をタービンの表面に吹き付け、タービン表面上に付
着した付着物質を除去した。タービン表面１m2当たりの
粉体の吹き付け量を40乃至60kgとした。付着物質除去後
のタービン表面には摩耗が認められなかった。またター
ビン表面上の付着物質の残存、粉体のタービン表面への
付着は認められなかった。By using a powder of melamine resin with a particle size of 42 to 90 mesh, the adhered substances sticking out to the surface of the power generation turbine of the boiling water nuclear power generation facility were removed. A direct pressure type blasting device 20 was used for the removal. Tank of powder 10
Then, the compressed air was fed into the tank 22 and the compressed air was sent from the compressed air source to the tank 22 and the transfer pipe 26. The feed rate of compressed air from the compressed air source was 1 Nm 3 / min, and the pressure was a gauge pressure of 5 kg / cm 2 . The amount of powder used was 300 kg / hour. The powder discharged from the discharge port provided at the bottom of the tank 22 is carried in the carrier pipe by compressed air and jetted through the nozzle 24. The inner diameter of the nozzle was 5 mm, the injection speed of compressed air from the nozzle was 150 m / sec, and the distance from the nozzle to the surface of the turbine was kept at 200 to 800 mm. The powder sprayed from the nozzle was sprayed on the surface of the turbine to remove the adhered substances adhering to the surface of the turbine. The amount of powder sprayed per 1 m 2 of turbine surface was 40 to 60 kg. No wear was observed on the surface of the turbine after removing the adhered substances. In addition, no adhered substances remained on the turbine surface and no powder adhered to the turbine surface.
除去に使用した後の粉体の燃焼残滓は、燃焼前の粉体の
約２重量％に過ぎなかった。The combustion residue of the powder after it was used for removal was only about 2% by weight of the powder before combustion.
比較のために、80乃至150メッシュの焼結アルミナを使
用して、上記と同様の条件にてタービン表面の付着物質
の除去を行ったところ、タービン表面には焼結アルミナ
による摩耗が認められた。For comparison, when 80 to 150 mesh sintered alumina was used to remove adhered substances on the turbine surface under the same conditions as above, wear due to sintered alumina was observed on the turbine surface. .
効果 沸騰水型原子力発電設備の発電用タービンの表面の洗浄
を本発明の付着物質除去方法にて行うことによって、タ
ービンの表面から付着物質が充分除去され旦つタービン
表面には摩耗が認めらなかった。また、メラミン樹脂か
らなる粉体を使用するので、使用後の粉体を燃焼でき、
付着物質を含む焼却残滓の保管量を従来の焼結アルミナ
を使用したブラスト法に比較して激減させることができ
た。Effect By cleaning the surface of the power generation turbine of the boiling water nuclear power generation facility by the method of removing the adhered substances of the present invention, the adhered substances are sufficiently removed from the surface of the turbine, and no wear is observed on the surface of the turbine. It was Also, since powder made of melamine resin is used, the powder after use can be burned,
The storage amount of the incineration residue containing the attached substances could be drastically reduced compared to the conventional blasting method using sintered alumina.
図は、本発明を実施するのに適したブラスト装置の模式
図である。 図中、10……粉体、20……ブラスト装置、22……タン
ク、24……ノズル、26……搬送パイプ、である。The figure is a schematic diagram of a blasting device suitable for practicing the present invention. In the figure, 10 ... powder, 20 ... blasting device, 22 ... tank, 24 ... nozzle, 26 ... conveying pipe.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−237400（ＪＰ，Ａ) 特開 昭63−256363（ＪＰ，Ａ) 特開 昭62−34779（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-237400 (JP, A) JP-A-63-256363 (JP, A) JP-A-62-34779 (JP, A)
Claims (2)
力発電設備の発電用タービンの表面に気体流と共に吹き
付け、該タービンの表面から付着物質を除去することを
特徴とする方法。1. A method for spraying powder made of melamine resin onto a surface of a power generation turbine of a boiling water nuclear power generation facility together with a gas flow to remove adhered substances from the surface of the turbine.
る特許請求の範囲第１項記載の方法。2. The method according to claim 1, wherein the particle size of the powder is 20 to 120 mesh.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63293474A JPH0761612B2 (en) | 1988-11-22 | 1988-11-22 | Cleaning method of turbine for power generation of boiling water nuclear power plant |
| DE1989605907 DE68905907T2 (en) | 1988-11-22 | 1989-11-21 | Method of cleaning a turbine in a nuclear power plant. |
| EP89312068A EP0370762B1 (en) | 1988-11-22 | 1989-11-21 | Method of cleaning power generation turbine of nuclear power generation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63293474A JPH0761612B2 (en) | 1988-11-22 | 1988-11-22 | Cleaning method of turbine for power generation of boiling water nuclear power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02145259A JPH02145259A (en) | 1990-06-04 |
| JPH0761612B2 true JPH0761612B2 (en) | 1995-07-05 |
Family
ID=17795213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63293474A Expired - Fee Related JPH0761612B2 (en) | 1988-11-22 | 1988-11-22 | Cleaning method of turbine for power generation of boiling water nuclear power plant |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0370762B1 (en) |
| JP (1) | JPH0761612B2 (en) |
| DE (1) | DE68905907T2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007309831A (en) * | 2006-05-19 | 2007-11-29 | Ihi Corp | Treating method of waste blast material |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0451383A1 (en) * | 1990-04-10 | 1991-10-16 | Sanyo Trading Co., Ltd. | Method for cleansing molds |
| JP5723942B2 (en) * | 2013-09-18 | 2015-05-27 | 株式会社不二機販 | Surface treatment method for powdered metal materials |
| DE102015209994A1 (en) * | 2015-05-29 | 2016-12-15 | Lufthansa Technik Ag | Method and device for cleaning a jet engine |
| CN106194282B (en) * | 2016-08-30 | 2017-10-13 | 安徽金禾实业股份有限公司 | A kind of melamine aminuria washes tower Steam Recovery electricity-generating method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1173263A (en) * | 1968-04-30 | 1969-12-03 | Chrysler Corp | Method of Cleaning a Gas Turbine Engine |
| DE2107479C3 (en) * | 1971-02-17 | 1974-01-03 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Process for the decontamination of the surfaces of nuclear reactor components |
| GB1571239A (en) * | 1977-08-18 | 1980-07-09 | Nojimagumi Co Ltd | Abrasive materials and a method of producing such materials |
| JPS57198916A (en) * | 1981-06-01 | 1982-12-06 | Nippon Atom Ind Group Co Ltd | Incinerating and volume decreasing equipment for waste sludge |
| JPS60237400A (en) * | 1983-12-24 | 1985-11-26 | 大同特殊鋼株式会社 | Decontamination method |
-
1988
- 1988-11-22 JP JP63293474A patent/JPH0761612B2/en not_active Expired - Fee Related
-
1989
- 1989-11-21 DE DE1989605907 patent/DE68905907T2/en not_active Expired - Fee Related
- 1989-11-21 EP EP89312068A patent/EP0370762B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007309831A (en) * | 2006-05-19 | 2007-11-29 | Ihi Corp | Treating method of waste blast material |
Also Published As
| Publication number | Publication date |
|---|---|
| DE68905907T2 (en) | 1993-11-11 |
| EP0370762B1 (en) | 1993-04-07 |
| JPH02145259A (en) | 1990-06-04 |
| DE68905907D1 (en) | 1993-05-13 |
| EP0370762A1 (en) | 1990-05-30 |
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