JPS6196111U - - Google Patents
Info
- Publication number
- JPS6196111U JPS6196111U JP17974384U JP17974384U JPS6196111U JP S6196111 U JPS6196111 U JP S6196111U JP 17974384 U JP17974384 U JP 17974384U JP 17974384 U JP17974384 U JP 17974384U JP S6196111 U JPS6196111 U JP S6196111U
- Authority
- JP
- Japan
- Prior art keywords
- reheater
- oxide film
- steam
- boiler device
- diagram showing
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Description
第１図Ａは、この考案の実施例に係る再熱器管
の部分拡大側断面図、第１図Ｂは、第１図ＡのＩ
部の拡大図、第２図は、この考案の実施例に係る
再熱器管を得るに好適な再熱器管の組立て前加熱
処理装置例の系統図、第３図は、蒸気雰囲気下加
熱処理を再熱器管に施した場合に得られる酸化皮
膜の厚みを文献値のそれとともにラルソン―ミラ
ーのパラメータＰに沿つて示す関係図、第４図は
、大気雰囲気下加熱処理を再熱器管に施した場合
に得られる酸化皮膜の厚みを加熱温度別に加熱時
間に沿つて示す関係図、第５図は、蒸気雰囲気下
加熱処理を再熱器管に施した場合の効果を説明す
る酸化皮膜厚みと孔食深さの関係図、第６図は、
この考案に係る蒸気雰囲気下および／または大気
雰囲気下加熱処理を再熱器管に施した場合の防食
効果を比較例とともに示す図、第７図は、従来の
中・小型発電用ボイラプラントの系統図、第８図
は、第７図に適用される再熱器例の側面図、第９
図は、再熱器内面が凝縮水により腐食される過程
を模式的に示す図である。
１…ボイラ本体、２…一次加熱器、３…二次加
熱器、４…再熱器、６…高圧タービン、７…低圧
タービン、１２…再熱器（構成電熱）管、１３…
再熱器入口側、１４…ボイラ燃焼ガス、１５…再
熱器管内壁母材、１６，１６Ａ…防食性酸化皮膜
、１７…凝縮水、１８…錆こぶ、１９…α−Ｆｅ
２Ｏ３、２０…蒸気、２１…孔食、２２…加熱炉
、２４…鈍水タンク、２６…熱交換器、２７…蒸
発器、２８…予熱器。
FIG. 1A is a partially enlarged side sectional view of a reheater tube according to an embodiment of this invention, and FIG. 1B is an I of FIG. 1A.
FIG. 2 is a system diagram of an example of a pre-assembly heat treatment apparatus for reheater tubes suitable for obtaining a reheater tube according to an embodiment of the present invention, and FIG. 3 is a diagram showing heating in a steam atmosphere. Figure 4 is a relationship diagram showing the thickness of the oxide film obtained when the treatment is applied to the reheater tube along with the literature value and the Larson-Miller parameter P. A relationship diagram showing the thickness of the oxide film obtained when applying the oxide film to the pipe according to the heating temperature and the heating time. The relationship between film thickness and pitting depth, Figure 6, is as follows:
Figure 7 is a diagram showing the corrosion prevention effect when heat treatment is applied to reheater tubes in a steam atmosphere and/or in an air atmosphere according to this invention, along with a comparative example. FIG. 8 is a side view of the reheater example applied to FIG. 7, and FIG.
The figure is a diagram schematically showing a process in which the inner surface of the reheater is corroded by condensed water. DESCRIPTION OF SYMBOLS 1... Boiler main body, 2... Primary heater, 3... Secondary heater, 4... Reheater, 6... High pressure turbine, 7... Low pressure turbine, 12... Reheater (constituent electric heating) pipe, 13...
Reheater inlet side, 14... Boiler combustion gas, 15... Reheater tube inner wall base material, 16, 16A... Corrosion-proof oxide film, 17... Condensed water, 18... Rust lumps, 19... α-Fe
2 O 3 , 20... Steam, 21... Pitting, 22... Heating furnace, 24... Blunt water tank, 26... Heat exchanger, 27... Evaporator, 28... Preheater.
Claims (1)
器の構成管を装置組立て前に水蒸気および／また
は大気雰囲気下で４５０〜５５０°Ｃ、１０〜１
，０００時間加熱処理し、管内面に１０〜１００
μｍ厚の防食性酸化皮膜を予め形成させたものと
することを特徴とするボイラ装置。 In a boiler device having a reheater, the tubes constituting the reheater are heated at 450 to 550°C in a steam and/or atmospheric atmosphere for 10 to 1
,000 hours of heat treatment, 10 to 100
A boiler device characterized in that a micrometer-thick anticorrosive oxide film is formed in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17974384U JPS6196111U (en) | 1984-11-27 | 1984-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17974384U JPS6196111U (en) | 1984-11-27 | 1984-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6196111U true JPS6196111U (en) | 1986-06-20 |
Family
ID=30737309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17974384U Pending JPS6196111U (en) | 1984-11-27 | 1984-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6196111U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50140703A (en) * | 1974-04-30 | 1975-11-12 | ||
| JPS59142302A (en) * | 1983-02-04 | 1984-08-15 | バブコツク日立株式会社 | Spacer structure of heat transfer pipe of reheater for boiler |
-
1984
- 1984-11-27 JP JP17974384U patent/JPS6196111U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50140703A (en) * | 1974-04-30 | 1975-11-12 | ||
| JPS59142302A (en) * | 1983-02-04 | 1984-08-15 | バブコツク日立株式会社 | Spacer structure of heat transfer pipe of reheater for boiler |
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