JPH07109295B2 - Steam temperature reduction device - Google Patents
Steam temperature reduction deviceInfo
- Publication number
- JPH07109295B2 JPH07109295B2 JP30957687A JP30957687A JPH07109295B2 JP H07109295 B2 JPH07109295 B2 JP H07109295B2 JP 30957687 A JP30957687 A JP 30957687A JP 30957687 A JP30957687 A JP 30957687A JP H07109295 B2 JPH07109295 B2 JP H07109295B2
- Authority
- JP
- Japan
- Prior art keywords
- spray water
- reheater
- boiler
- steam
- control 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 239000007921 spray Substances 0.000 claims description 56
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 description 18
- 230000008646 thermal stress Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は事業用、産業用ボイラの過熱低減器の延命を計
るようにした蒸気温度低減装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a steam temperature reduction device for extending the life of an overheat reducer of a commercial or industrial boiler.
第３図に、従来の技術の一例として、変圧貫流型ボイラ
と蒸気タービンとを組合わせた系統の概念図を示す。こ
の図により缶水−蒸気の系統を説明する。FIG. 3 shows a conceptual diagram of a system in which a once-through type boiler and a steam turbine are combined as an example of a conventional technique. The system of can water-steam will be described with reference to this figure.
復水器１において蒸気が復水されて温水となり、復水ポ
ンプ２により、復水処理装置３、低圧給水加熱器４に送
られて加熱され、脱気器５で脱気されて、さらにボイラ
給水ポンプ６で加圧され、高圧給水加熱器７およびアデ
ィショナルヒータ８を経て、ボイラの煙道部に設置され
ている節炭器９に送られ、さらに加熱される。次にボイ
ラ火炉壁10に送られて蒸気との混合気となり、気水分離
器11で蒸気のみが分離され、一次過熱器12へ送られ過熱
されて過熱蒸気となる。この過熱蒸気は、過熱器過熱低
減器13で一定の温度に調整され、最終過熱器14を経て、
高圧タービン15へ送られ、タービンを回転した後、再熱
器過熱低減器16で温度を調整し、再熱器17に送られて再
び過熱され、中圧タービン18さらには低圧タービン19を
径て、復水器１へと再び投入される。Steam is condensed in the condenser 1 to become warm water, which is sent to the condensate treatment device 3 and the low-pressure feed water heater 4 by the condensate pump 2 to be heated and deaerated by the deaerator 5, and further the boiler. It is pressurized by the water supply pump 6, is sent to the economizer 9 installed in the flue part of the boiler through the high-pressure water heater 7 and the additional heater 8, and is further heated. Next, it is sent to the boiler furnace wall 10 to form a mixture with steam, and only steam is separated by the steam separator 11, and it is sent to the primary superheater 12 to be superheated to become superheated steam. This superheated steam is adjusted to a constant temperature by the superheater / superheat reducer 13, passes through the final superheater 14,
After being sent to the high-pressure turbine 15 and rotating the turbine, the temperature is adjusted by the reheater overheat reducer 16 and sent to the reheater 17 to be superheated again, and the intermediate-pressure turbine 18 and the low-pressure turbine 19 are radiated. , Is re-injected into the condenser 1.
上述の再熱器過熱低減器16へは、ボイラ給水ポンプ６よ
り分岐した再熱器スプレ水管21を径て、高温水が投入さ
れるようになっており、その流量は再熱器スプレ水制御
弁22により調整されるようになっている。第４図は再熱
器過熱低減器16の断面図で、24は再熱器過熱低減器保護
筒、25は再熱器スプレ水管台、26は再熱器スプレ水ノズ
ルである。High-temperature water is introduced into the above-mentioned reheater overheat reducer 16 through a reheater spray water pipe 21 branched from the boiler water supply pump 6, and its flow rate is controlled by the reheater spray water control. It is adapted to be adjusted by the valve 22. FIG. 4 is a cross-sectional view of the reheater overheat reducer 16, where 24 is a reheater overheat reducer protective cylinder, 25 is a reheater spray water nozzle, and 26 is a reheater spray water nozzle.
再熱器スプレは間欠的に投入されるので、これが投入さ
れない時はスプレ水は再熱器スプレ水管21の中に滞留し
た状態にある。したがって高温のスプレ水は自然放熱に
より次第に冷却され、長時間再熱器スプレが投入されな
い場合には、大気温度近くまで冷却されることになる。
その後に再熱器スプレ水投入指令により再熱器スプレ水
制御弁22が開くと、この冷えたスプレ水が高温の再熱器
過熱低減器16に投入され、その内部の再熱器スプレ水管
台25および再熱器スプレ水ノズル26等に大きな温度差に
よる繰り返し熱応力が発生して、当該部の寿命低下や破
損の原因となっていた。Since the reheater spray is intermittently charged, the spray water remains in the reheater spray water pipe 21 when it is not charged. Therefore, the high-temperature spray water is gradually cooled by natural heat dissipation, and when the reheater spray is not input for a long time, it is cooled to near the atmospheric temperature.
After that, when the reheater spray water control valve 22 is opened by the reheater spray water input command, this cooled spray water is thrown into the high temperature reheater overheat reducer 16, and the reheater spray water nozzle inside it. 25, the reheater spray water nozzle 26, and the like repeatedly generate thermal stress due to a large temperature difference, which causes the life of the relevant part to be shortened and damage.
本発明は従来の技術における前記問題点を解決するため
に、蒸気温度をスプレ水により制御するボイラにおい
て、スプレ水制御弁の上流からボイラ給水ポンプの上流
側位置へスプレ水を循環させるスプレ水循環管を設けた
ことを特徴とする蒸気温度低減装置を提案するものであ
る。In order to solve the above problems in the prior art, the present invention is a boiler that controls the steam temperature by spray water, and a spray water circulation pipe that circulates the spray water from the upstream of the spray water control valve to the upstream position of the boiler feed pump. The present invention proposes a steam temperature reduction device characterized by being provided with.
本発明は上記手段を講じたことにより、スプレ水はスプ
レ水管の中に滞留することなく、常時スプレ水管からス
プレ水循環管、ボイラ給水ポンプへと循環するから、冷
却が防止される。According to the present invention, by taking the above-mentioned means, the spray water does not stay in the spray water pipe and constantly circulates from the spray water pipe to the spray water circulation pipe and the boiler feed pump, so that cooling is prevented.
以下本発明の一実施例を第１図により説明する。前記の
とおり、再熱器スプレ水管21は、ボイラ給水ポンプ６よ
り分岐して、再熱器過熱低減器16へ接続されており、再
熱器スプレ水制御弁22を介装している。この再熱器スプ
レ水制御弁22は、再熱器過熱低減器16に近い位置に設置
していることが望ましい。本実施例では、更にこの再熱
器スプレ水制御弁22の上流で、これに近い位置から分岐
して脱気器５に接続する再熱器スプレ水循環管23aが設
けられている。An embodiment of the present invention will be described below with reference to FIG. As described above, the reheater spray water pipe 21 is branched from the boiler feed water pump 6, is connected to the reheater overheat reducer 16, and is provided with the reheater spray water control valve 22. The reheater spray water control valve 22 is preferably installed at a position close to the reheater overheat reducer 16. In this embodiment, a reheater spray water circulation pipe 23a is provided upstream of the reheater spray water control valve 22 and branched from a position close to the reheater spray water control valve 22 and connected to the deaerator 5.
再熱器過熱低減器16へのスプレ水投入は間欠的に行なわ
れるが、スプレを停止している時、すなわち再熱器スプ
レ水制御弁22が閉じている時は、スプレ水は再熱器スプ
レ水管21から再熱器スプレ水循環管23aへと流れるか
ら、常時、高温のスプレ水が再熱器スプレ水管21内に流
れており、再熱器スプレ水制御弁22が開かれた時には高
温のスプレ水が投入される。したがって、再熱器過熱低
減器16の再熱器スプレ水管台25や再熱器スプレ水ノズル
26に生じる熱応力が緩和される。The spray water is supplied to the reheater overheat reducer 16 intermittently, but when the spray is stopped, that is, when the reheater spray water control valve 22 is closed, the spray water is reheated. Since it flows from the spray water pipe 21 to the reheater spray water circulation pipe 23a, high-temperature spray water is constantly flowing in the reheater spray water pipe 21, and when the reheater spray water control valve 22 is opened, the temperature of the high temperature spray water is high. Spray water is added. Therefore, the reheater spray water nozzle 25 of the reheater overheat reducer 16 and the reheater spray water nozzle
The thermal stress generated in 26 is relieved.
第２図は本発明の他の実施例を示す。この実施例では、
再熱器スプレ水循環管23bを、脱気器５にでなく給水ポ
ンプ６の入口に接続した点が、前記第１図図示の実施例
と異なるだけであるから、詳細な説明は省略する。FIG. 2 shows another embodiment of the present invention. In this example,
The point that the reheater spray water circulation pipe 23b is connected not to the deaerator 5 but to the inlet of the water supply pump 6 is different from the embodiment shown in FIG.
なお上記実施例はいずれも再熱器スプレ水を常時循環さ
せて再熱器過熱低減器16を保護するものであるが、本発
明は過熱器スプレ水を常時循環させて過熱器過熱低減器
13の保護にも適用できる。Incidentally, in all the above examples, the reheater spray water is constantly circulated to protect the reheater overheat reducer 16, but the present invention is to constantly circulate the superheater spray water to superheater overheat reducer.
It can also be applied to the protection of 13.
本発明はまた、変圧貫流型ボイラに限定されるものでは
なく、定圧貫流型、強制循環型、自然循環型等、その他
のボイラにも当然適用できる。The present invention is not limited to the once-through type boiler, but can be naturally applied to other boilers such as a constant pressure once-through type, a forced circulation type, and a natural circulation type.
本発明によれば、過熱低減スプレが間欠的に投入される
場合でも、スプレ水が滞留して過度に冷却されることが
なくなる。したがって、過熱低減器に発生する熱応力が
緩和され、その寿命を延ばすことができる。According to the present invention, even when the superheat reducing spray is intermittently charged, the spray water is prevented from accumulating and being excessively cooled. Therefore, the thermal stress generated in the overheat reducer is relieved, and the life thereof can be extended.
第１図および第２図はいずれも本発明の実施例を示す
図、第３図は従来のボイラ・タービン系統の一例を示す
図、第４図は再熱器過熱低減器を示す断面図である。 １……復水器;2……復水ポンプ;3……復水処理装置;4…
…低圧給水加熱器;5……脱気器;6……ボイラ給水ポン
プ;7……高圧給水加熱器;8……アディショナルヒータ;9
……節炭器;10……ボイラ火炉壁;11……気水分離器;12
……一次過熱器;13……過熱器過熱低減器;14……最終過
熱器;15……高圧タービン;16……再熱器過熱低減器;17
……再熱器;18……中圧タービン;19……低圧タービン;2
0……過熱器スプレ水制御弁;21……再熱器スプレ水管;2
2……再熱器スプレ水制御弁;23a,23b……再熱器スプレ
水循環管;24……再熱器過熱低減器保護筒;25……再熱器
スプレ水管台;26……再熱器スプレ水ノズル；1 and 2 are views showing an embodiment of the present invention, FIG. 3 is a view showing an example of a conventional boiler / turbine system, and FIG. 4 is a sectional view showing a reheater overheat reducer. is there. 1 ... Condenser; 2 ... Condensate pump; 3 ... Condensate treatment device; 4 ...
… Low-pressure feedwater heater; 5 …… Deaerator; 6 …… Boiler feedwater pump; 7 …… High-pressure feedwater heater; 8 …… Additional heater; 9
...... Coal saver; 10 ...... Boiler furnace wall; 11 ...... Steam / water separator; 12
...... Primary superheater; 13 ...... Superheater Superheat reducer; 14 …… Final superheater; 15 …… High pressure turbine; 16 …… Reheater Superheat reducer; 17
...... Reheater; 18 …… Medium pressure turbine; 19 …… Low pressure turbine; 2
0 …… Superheater spray water control valve; 21 …… Reheater spray water pipe; 2
2 …… Reheater spray water control valve; 23a, 23b …… Reheater spray water circulation pipe; 24 …… Reheater overheat reducer protective cylinder; 25 …… Reheater spray water nozzle; 26 …… Reheat Water spray nozzle;
Claims (1)
において、スプレ水制御弁の上流からボイラ給水ポンプ
の上流側位置へスプレ水を循環させるスプレ水循環管を
設けたことを特徴とする蒸気温度低減装置。1. A boiler for controlling steam temperature by means of spray water, wherein a spray water circulation pipe for circulating the spray water from an upstream of a spray water control valve to a position upstream of a boiler feed water pump is provided. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30957687A JPH07109295B2 (en) | 1987-12-09 | 1987-12-09 | Steam temperature reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30957687A JPH07109295B2 (en) | 1987-12-09 | 1987-12-09 | Steam temperature reduction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150704A JPH01150704A (en) | 1989-06-13 |
| JPH07109295B2 true JPH07109295B2 (en) | 1995-11-22 |
Family
ID=17994692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30957687A Expired - Lifetime JPH07109295B2 (en) | 1987-12-09 | 1987-12-09 | Steam temperature reduction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07109295B2 (en) |
-
1987
- 1987-12-09 JP JP30957687A patent/JPH07109295B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01150704A (en) | 1989-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 13 Free format text: PAYMENT UNTIL: 20081122 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081122 Year of fee payment: 13 |