JP2006057929A - Auxiliary steam pressure control method for once-through boiler - Google Patents

Auxiliary steam pressure control method for once-through boiler Download PDF

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JP2006057929A
JP2006057929A JP2004240968A JP2004240968A JP2006057929A JP 2006057929 A JP2006057929 A JP 2006057929A JP 2004240968 A JP2004240968 A JP 2004240968A JP 2004240968 A JP2004240968 A JP 2004240968A JP 2006057929 A JP2006057929 A JP 2006057929A
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auxiliary steam
boiler
steam
pressure
once
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JP2006057929A5 (en
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Hideaki Tamai
秀明 玉井
Masaru Morio
勝 森尾
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Mitsubishi Power Ltd
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Babcock Hitachi KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary steam pressure control method and controller for a once-through boiler, capable of using steam of its own can as auxiliary steam even in time of a low load of the boiler without newly installing a boiler auxiliary steam system when remodeling a constant-pressure once-through boiler into a variable-pressure once-through boiler. <P>SOLUTION: In this auxiliary steam pressure control method for the once-through boiler, when controlling an auxiliary steam header pressure to be constant by opening adjustment of a superheater bypass valve, a flash tank auxiliary steam pressure regulating valve and a low temperature reheating auxiliary steam pressure regulating valve, the superheater bypass valve is opened to supply superheated steam to a flash tank, and the flash tank auxiliary steam pressure regulating valve is adjusted when a once-through boiler load is less than 50%, and superheater bypass valve is closed, and the low temperature reheating auxiliary steam pressure regulating valve is adjusted to control the auxiliary steam header pressure to be constant when the boiler load is 50% or above. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、貫流ボイラの補助蒸気圧制御方法に係り、特に起動時および停止時のみならず低負荷運転時においても自己ボイラ（自缶）での補助蒸気の供給が可能な貫流ボイラの補助蒸気圧制御方法に関する。   The present invention relates to an auxiliary steam pressure control method for a once-through boiler, and more particularly, an auxiliary steam for a once-through boiler capable of supplying auxiliary steam in a self-boiler (self-can) not only when starting and stopping but also during low-load operation. The present invention relates to a pressure control method.

貫流ボイラとしては、従来より定圧貫流ボイラ（ＵＰボイラ）や変圧貫流ボイラ（ベンソンボイラ）が知られており、これらの水蒸気系統に関し、特許文献１には、起動時に一次過熱器バイパス弁（圧力減少弁）を開き、蒸気をフラッシュタンクに送り、通常運転時には該バイパス弁を閉じて蒸気温度、圧力を一定に保つ貫流型ボイラ用始動システムが提案され、また特許文献２には、ボイラ起動時および停止時における補助蒸気取出管の調整弁に圧力調整機能を持たせることが記載されている。   As a once-through boiler, a constant-pressure once-through boiler (UP boiler) and a transformer once-through boiler (Benson boiler) are known. Valve is opened, steam is sent to the flash tank, and during normal operation, the bypass valve is closed to keep the steam temperature and pressure constant. Patent Document 2 discloses a startup system for boiler It is described that a pressure regulating function is provided to the regulating valve of the auxiliary steam take-out pipe at the time of stopping.

図３は、従来の定圧貫流ボイラの水蒸気系統の説明図である。図３において、定圧貫流ボイラは、貫流ボイラ１で発生した蒸気をさらに過熱する一次過熱器２および二次過熱器３と、該過熱蒸気を使用して発電する高圧タービン６と、該高圧タービン６で使用された低温蒸気を再加熱する再熱器７と、前記一次過熱器２の出口から取り出された過熱蒸気の一部が供給されるフラッシュタンク４と、該フラッシュタンク４に供給する前記過熱蒸気量を調整する過熱器バイパス弁１３と、前記フラッシュタンク４で発生した蒸気を補助蒸気ヘッダ５に供給するフラッシュタンク補助蒸気圧力調整弁１１と、前記再熱器７に供給される低温蒸気の一部を補助蒸気ヘッダ５に供給する低温再熱補助蒸気圧力調整弁１２と、他ボイラ（他缶）から蒸気を供給するための他缶連絡弁１４とを備える。   FIG. 3 is an explanatory diagram of a steam system of a conventional constant pressure once-through boiler. 3, the constant pressure once-through boiler includes a primary superheater 2 and a secondary superheater 3 that further superheat the steam generated in the once-through boiler 1, a high-pressure turbine 6 that generates electric power using the superheated steam, and the high-pressure turbine 6 A reheater 7 for reheating the low temperature steam used in the above, a flash tank 4 to which a part of the superheated steam taken out from the outlet of the primary superheater 2 is supplied, and the superheat supplied to the flash tank 4 A superheater bypass valve 13 for adjusting the amount of steam, a flash tank auxiliary steam pressure adjusting valve 11 for supplying steam generated in the flash tank 4 to the auxiliary steam header 5, and a low-temperature steam supplied to the reheater 7 A low-temperature reheat auxiliary steam pressure regulating valve 12 for supplying a part to the auxiliary steam header 5 and an other can communication valve 14 for supplying steam from another boiler (other can) are provided.

上記構成において、補助蒸気ヘッダ５への補助蒸気供給は、過熱器バイパス弁１３およびフラッシュタンク補助蒸気圧力調整弁１１と、低温再熱補助蒸気圧力調整弁１２と、他缶連絡弁１４の開度調整により行われる。具体的には、フラッシュタンク４の圧力が規定値（約２０ｋｇ／ｃｍ2 ｇ）を超えている場合（起動時または停止時）には、過熱器バイパス弁１３およびフラッシュタンク補助蒸気圧力調整弁１１の開度調整により行われ、また、高圧タービン６で使用された低温蒸気の圧力が規定値を超えている場合（約５０％以上の高負荷時）には、低温再熱補助蒸気圧力調整弁１２の開度調整により補助蒸気ヘッダ５に蒸気が供給され、さらに、それ以外の場合には他缶連絡弁１５により他缶から蒸気が供給され、補助蒸気ヘッダ５の蒸気圧力が一定に維持される。 In the above configuration, the auxiliary steam supply to the auxiliary steam header 5 is performed by the superheater bypass valve 13, the flash tank auxiliary steam pressure adjustment valve 11, the low temperature reheat auxiliary steam pressure adjustment valve 12, and the opening of the other can communication valve 14. It is done by adjustment. Specifically, when the pressure of the flash tank 4 exceeds a specified value (about 20 kg / cm 2 g) (when starting or stopping), the superheater bypass valve 13 and the flash tank auxiliary steam pressure adjusting valve 11 are used. When the pressure of the low-temperature steam used in the high-pressure turbine 6 exceeds the specified value (at a high load of about 50% or more), the low-temperature reheat auxiliary steam pressure adjustment valve is used. The steam is supplied to the auxiliary steam header 5 by adjusting the opening degree of 12, and in other cases, the steam is supplied from the other can by the other can communication valve 15, and the steam pressure of the auxiliary steam header 5 is kept constant. The

図４は、従来の変圧貫流ボイラ（ベンソンボイラ）の水蒸気系統の説明図である。図４において、図３の定圧貫流ボイラと異なる点は、フラッシュタンク４を設けることなく、一次過熱器２の出口ヘッダから取り出した過熱蒸気を補助蒸気ヘッダ５に直接供給するボイラ補助蒸気圧力調節弁１０を設け、過熱器バイパス弁１３から取り出した過熱蒸気を図示しない復水器にバイパスさせるようにした点である。
このような構成において、補助蒸気ヘッダ５への補助蒸気の供給は、起動時および停止時、または低温再熱蒸気の圧力が規定値に満たない場合には、ボイラ補助蒸気圧力調整弁１０の開度調整により、また、低温再熱蒸気の圧力が規定値を超えている場合には、低温再熱補助蒸気圧力調整弁１２により補助蒸気ヘッダ５の蒸気圧力が一定に維持される。 FIG. 4 is an explanatory diagram of a steam system of a conventional transformer once-through boiler (Benson boiler). 4 is different from the constant pressure once-through boiler of FIG. 3 in that a boiler auxiliary steam pressure control valve that directly supplies superheated steam taken out from the outlet header of the primary superheater 2 to the auxiliary steam header 5 without providing the flash tank 4. 10 is provided, and the superheated steam taken out from the superheater bypass valve 13 is bypassed to a condenser (not shown).
In such a configuration, the auxiliary steam is supplied to the auxiliary steam header 5 at the time of starting and stopping, or when the pressure of the low-temperature reheat steam is less than the specified value. When the pressure of the low-temperature reheat steam exceeds the specified value by adjusting the degree, the low-pressure reheat auxiliary steam pressure adjustment valve 12 keeps the steam pressure of the auxiliary steam header 5 constant.

一方、１９８０年代後半からは、発電設備において、原子力設備が増加し、すでに稼働しているボイラの最低負荷の切下げ（１５％ＥＣＲ程度まで）や起動・停止の増加が要求されている。しかし、定圧貫流ボイラでの補助蒸気供給において、自缶の蒸気を使用する低温再熱補助蒸気の運用が、使用圧力の関係からボイラ負荷約５０％以上である場合に制限されるという問題があった。
このため、図１に示す定圧貫流ボイラを、最低負荷が切下げられ、かつ起動・停止が容易な図２に示す変圧貫流ボイラに改造する工事が進められているが、定圧貫流ボイラに、変圧貫流ボイラの水蒸気系統のように一次過熱器の出口ヘッダから取り出した蒸気を補助蒸気ヘッダに直接供給するボイラ補助蒸気系統を新たに設置すると、コスト高となるだけでなく、水蒸気系統が複雑になるという問題があった。
特公昭５８−１２９１４号公報 特開平７−１１９９０６号公報 On the other hand, since the latter half of the 1980s, nuclear power facilities have increased in power generation facilities, and it has been required to cut down the minimum load (up to about 15% ECR) and increase start / stop of boilers that are already in operation. However, in the supply of auxiliary steam in a constant pressure once-through boiler, there is a problem that the operation of the low-temperature reheat auxiliary steam using the steam of its own can be limited when the boiler load is about 50% or more due to the operating pressure. It was.
For this reason, the constant pressure once-through boiler shown in FIG. 1 is being remodeled into the transformer once-through boiler shown in FIG. 2 in which the minimum load is cut down and easy to start and stop. Installing a new boiler auxiliary steam system that directly supplies steam extracted from the outlet header of the primary superheater to the auxiliary steam header, such as the steam system of the boiler, increases the cost and also complicates the steam system. There was a problem.
Japanese Patent Publication No.58-12914 Japanese Patent Laid-Open No. 7-119906

本発明の課題は、上記従来技術の問題点を解決し、定圧貫流ボイラから変圧貫流ボイラに改造するにあたり、新たに１次過熱器出口ヘッダから蒸気を取り出すボイラ補助蒸気系統を設置することなく、ボイラ低負荷時においても補助蒸気として自缶の蒸気を使用することができる貫流ボイラの補助蒸気圧制御方法を提供することにある。   The problem of the present invention is to solve the above-mentioned problems of the prior art, and to remodel a constant pressure once-through boiler into a transformer once-through boiler without newly installing a boiler auxiliary steam system for taking out steam from the primary superheater outlet header, An object of the present invention is to provide an auxiliary steam pressure control method for a once-through boiler that can use the steam of its own can as auxiliary steam even when the boiler has a low load.

本発明者らは、上記課題について鋭意検討した結果、ボイラ起動時、停止時のバイパス運転用として設置する過熱器バイパス系統を、低温再熱蒸気系統が使用できない低負荷時（約５０％負荷以下）において補助蒸気ヘッダ圧力の一定圧力制御用に使用することにより上記課題を達成できることを見いだし、本発明に到達した。
すなわち、本願で特許請求される発明は以下の通りである。 As a result of intensive studies on the above problems, the present inventors have found that a superheater bypass system installed for bypass operation at the time of boiler start-up and stop is at a low load (about 50% load or less) in which a low-temperature reheat steam system cannot be used. ), It was found that the above-mentioned problems can be achieved by using the auxiliary steam header pressure for constant pressure control, and the present invention has been achieved.
That is, the invention claimed in the present application is as follows.

（１）貫流ボイラの上流に設けられた過熱器から蒸気の一部をフラッシュタンクに供給するための過熱器バイパス弁、該フラッシュタンクで発生した蒸気を補助蒸気ヘッダに供給するフラッシュタンク補助蒸気圧力調整弁、および低温再熱蒸気系統の蒸気の一部を前記補助蒸気ヘッダに供給する低温再熱補助蒸気圧力調整弁の開度を調整して前記補助蒸気ヘッダの蒸気圧力を一定に制御するにあたり、前記貫流ボイラ負荷が５０％未満のときには、前記過熱器バイパス弁を開き、過熱蒸気を前記フラッシュタンクに供給するとともに前記フラッシュタンク補助蒸気圧力調整弁を調整し、かつ前記ボイラ負荷が５０％以上のときには、前記過熱器バイパス弁を閉じ、前記低温再熱補助蒸気圧力調節弁を調整して前記補助蒸気ヘッダ圧力が一定になるように制御することを特徴とする貫流ボイラの補助蒸気圧制御方法。   (1) A superheater bypass valve for supplying a part of steam to a flash tank from a superheater provided upstream of the once-through boiler, and a flash tank auxiliary steam pressure for supplying steam generated in the flash tank to an auxiliary steam header In controlling the steam pressure of the auxiliary steam header to be constant by adjusting the opening of the regulating valve and the low temperature reheat auxiliary steam pressure regulating valve that supplies a part of the steam of the low temperature reheat steam system to the auxiliary steam header. When the once-through boiler load is less than 50%, the superheater bypass valve is opened, superheated steam is supplied to the flash tank, the flash tank auxiliary steam pressure adjusting valve is adjusted, and the boiler load is 50% or more. The superheater bypass valve is closed and the low temperature reheat auxiliary steam pressure adjustment valve is adjusted so that the auxiliary steam header pressure remains constant. Auxiliary steam pressure control method once-through boiler and controlling the so that.

本発明によれば、低温再熱蒸気系統が使用できない定圧貫流ボイラの低負荷時において、起動バイパス系統を補助蒸気制御に使用することにより、補助蒸気の自缶運用ができ、また新たにボイラ補助蒸気系統を追加する必要がないため、低コストでの変圧貫流ボイラへの改造が可能となる。   According to the present invention, when a constant pressure once-through boiler that cannot use a low-temperature reheat steam system is used at a low load, the start-up bypass system can be used for auxiliary steam control, so that auxiliary steam can be operated by itself, and a new boiler auxiliary system can be used. Since it is not necessary to add a steam system, it is possible to modify the transformer once-through boiler at low cost.

図１は、本発明の一例を示す貫流ボイラ水蒸気系統の説明図であり、図２は、本発明の一例を示す補助蒸気の制御系統図である。
図１において、図３と異なる点は、過熱器バイパス弁１３、フラッシュタンク補助蒸気圧力調整弁１１および低温再熱補助蒸気圧力調整弁１２の開度調整による補助蒸気ヘッダ５への補助蒸気の供給を、制御装置８により行うようにした点である。
図１において、ボイラ負荷５０％未満（低負荷時）の場合には、過熱器バイパス系統に設置されている過熱器バイパス弁１３を開にし、その蒸気をフラッシュタンク４に流入させ、フラッシュタンク発生蒸気系統からフラッシュタンク補助蒸気圧力調整弁１１の調整により補助蒸気ヘッダ５に蒸気が供給される。また、補助蒸気ヘッダ５の圧力を検知する信号を使用して補助蒸気ヘッダ圧力が一定になるようにフィードバック制御が行われる。この時の過熱器バイパス弁１３およびフラッシュタンク補助蒸気圧力調整弁１１の制御は図２の制御系統図に従って以下のように行われる。 FIG. 1 is an explanatory diagram of a once-through boiler steam system showing an example of the present invention, and FIG. 2 is a control system diagram of auxiliary steam showing an example of the present invention.
1 differs from FIG. 3 in that auxiliary steam is supplied to the auxiliary steam header 5 by adjusting the opening degree of the superheater bypass valve 13, the flash tank auxiliary steam pressure adjusting valve 11 and the low temperature reheat auxiliary steam pressure adjusting valve 12. Is performed by the control device 8.
In FIG. 1, when the boiler load is less than 50% (when the load is low), the superheater bypass valve 13 installed in the superheater bypass system is opened and the steam flows into the flash tank 4 to generate the flash tank. Steam is supplied to the auxiliary steam header 5 by adjusting the flash tank auxiliary steam pressure regulating valve 11 from the steam system. Further, feedback control is performed using a signal for detecting the pressure of the auxiliary steam header 5 so that the auxiliary steam header pressure becomes constant. Control of the superheater bypass valve 13 and the flash tank auxiliary steam pressure regulating valve 11 at this time is performed as follows according to the control system diagram of FIG.

過熱器バイパス弁１３は、従来の定圧貫流ボイラ起動バイパス制御としての信号、すなわち、主蒸気圧力指令に基づくプログラム指令による関数発生器（ＦＸ）２１と、主蒸気圧力（ＭＳＰ）および主蒸気圧力指令（ＭＰＤ）の偏差をとるための加算器（Σ）２２の各信号に基づいた比例積分器（ＰＩＤ）２３の出力指令信号ａ1 により作動するが、本発明においては、さらに補助蒸気ヘッダ圧力発振器（ＡＳＰ）２４からの信号と補助蒸気圧力の設定値２７に基づいて差分器（Δ）２５により圧力偏差を出力し、その圧力偏差に基づいて比例積分器（ＰＩＤ）２６により弁開度指令信号ａ2 を出力し、上記起動バイパス制御からの出力指令信号ａ1 との比較を高選択器（ＨＳ）２８により行い、高い方の信号を選択して過熱器バイパス弁１３の指令信号とする。
なお、上記補助蒸気圧力の設定値２７は、補助蒸気制御を行う負荷５０％未満では設定値２４．５ａｔｇとし、負荷５０％以上では０ａｔｇとして過熱器バイパス弁１３を全閉させるインターロックとする。 The superheater bypass valve 13 is a signal as a conventional constant pressure once-through boiler start-up bypass control, that is, a function generator (FX) 21 based on a program command based on a main steam pressure command, a main steam pressure (MSP), and a main steam pressure command. (MPD) is operated by the output command signal a 1 of the proportional integrator (PID) 23 based on each signal of the adder (Σ) 22 for taking the deviation. In the present invention, the auxiliary steam header pressure oscillator is further operated. Based on the signal from the (ASP) 24 and the set value 27 of the auxiliary steam pressure, the pressure difference is output by the differencer (Δ) 25, and the valve opening degree command signal is output by the proportional integrator (PID) 26 based on the pressure deviation. a 2 is output and compared with the output command signal a 1 from the start bypass control by the high selector (HS) 28, the higher signal is selected and the superheater bypass valve 13 Use command signal.
The set value 27 of the auxiliary steam pressure is set to 24.5 atg when the load for performing the auxiliary steam control is less than 50%, and is set to 0 atg when the load is 50% or more, and is an interlock that fully closes the superheater bypass valve 13.

また、フラッシュタンク補助蒸気圧力調整弁１１には、過熱器バイパス弁１３により補助蒸気制御を行っている時に全開とする必要があるため、高選択器（ＨＳ）２８により信号ａ2 が選択されている時に全開となるように切替器（Ｔ）３０により全開指令信号が出力される。
さらに、ボイラ負荷５０％以上の場合には、低温再熱系統からの補助蒸気を使用することから、フラッシュタンク補助蒸気圧力調節弁１１を全閉とするために切替器（Ｔ）２９により全閉指令信号が出力されると同時に低温再熱補助蒸気圧力調整弁１２を全開とする信号が出力される。
このように低温再熱蒸気系統が使用できない低負荷時において、起動バイパス系統を補助蒸気制御に使用することにより、新たにボイラ補助蒸気系統を追加することなく、補助蒸気の自缶運用が可能となる。 Further, since the flash tank auxiliary steam pressure adjusting valve 11 needs to be fully opened when the auxiliary steam control is performed by the superheater bypass valve 13, the signal a 2 is selected by the high selector (HS) 28. A full open command signal is output by the switch (T) 30 so that the full open state is established when the switch is open.
Further, when the boiler load is 50% or more, auxiliary steam from the low-temperature reheat system is used, so that the switch (T) 29 is fully closed to fully close the flash tank auxiliary steam pressure control valve 11. At the same time as the command signal is output, a signal for fully opening the low temperature reheat auxiliary steam pressure regulating valve 12 is output.
In this way, when the low temperature reheat steam system cannot be used, by using the startup bypass system for auxiliary steam control, it is possible to operate the auxiliary steam by itself without adding a boiler auxiliary steam system. Become.

本発明によれば、定圧貫流ボイラから変圧貫流ボイラへの改造を低コストで行うことができるため、発電設備の運用の多様化に容易に対応することができる。   According to the present invention, the constant pressure once-through boiler can be remodeled from the constant pressure once-through boiler at a low cost, so that it is possible to easily cope with the diversification of operation of the power generation equipment.

本発明の一例を示す貫流ボイラ水蒸気系統の説明図。Explanatory drawing of the once-through boiler steam system which shows an example of this invention. 本発明の一例を示す補助蒸気の制御系統図。The control system diagram of auxiliary steam showing an example of the present invention. 従来の定圧貫流ボイラ水蒸気系統の説明図。Explanatory drawing of the conventional constant pressure once-through boiler steam system. 従来の変圧貫流ボイラ水蒸気系統の説明図。Explanatory drawing of the conventional transformer once-through boiler steam system.

符号の説明Explanation of symbols

１…ボイラ、２…一次過熱器、３…二次過熱器、４…フラッシュタンク、５…補助蒸気ヘッダ、６…高圧タービン、７…再熱器、８…制御装置、１０…ボイラ補助蒸気圧力調整弁、１１…フラッシュタンク補助蒸気圧力調整弁、１２…低温再熱補助蒸気圧力調整弁、１３…過熱器バイパス弁、１４…他缶連絡弁、２１…関数発信器、２２…加算器、２３…比例積分器、２４…圧力発信器、２５…差分器、２６…比例積分器、２７…設定値、２８…高選択器、２９…切替器、３０…切替器。   DESCRIPTION OF SYMBOLS 1 ... Boiler, 2 ... Primary superheater, 3 ... Secondary superheater, 4 ... Flash tank, 5 ... Auxiliary steam header, 6 ... High pressure turbine, 7 ... Reheater, 8 ... Controller, 10 ... Boiler auxiliary steam pressure Adjustment valve, 11 ... Flash tank auxiliary steam pressure adjustment valve, 12 ... Low temperature reheat auxiliary steam pressure adjustment valve, 13 ... Superheater bypass valve, 14 ... Other can communication valve, 21 ... Function transmitter, 22 ... Adder, 23 ... proportional integrator, 24 ... pressure transmitter, 25 ... difference machine, 26 ... proportional integrator, 27 ... set value, 28 ... high selector, 29 ... switch, 30 ... switch.

Claims (1)

貫流ボイラの上流に設けられた過熱器から蒸気の一部をフラッシュタンクに供給するための過熱器バイパス弁、該フラッシュタンクで発生した蒸気を補助蒸気ヘッダに供給するフラッシュタンク補助蒸気圧力調整弁、および低温再熱蒸気系統の蒸気の一部を前記補助蒸気ヘッダに供給する低温再熱補助蒸気圧力調整弁の開度を調整して前記補助蒸気ヘッダの蒸気圧力を一定に制御するにあたり、前記貫流ボイラ負荷が５０％未満のときには、前記過熱器バイパス弁を開き、過熱蒸気を前記フラッシュタンクに供給するとともに前記フラッシュタンク補助蒸気圧力調整弁を調整し、かつ前記ボイラ負荷が５０％以上のときには、前記過熱器バイパス弁を閉じ、前記低温再熱補助蒸気圧力調節弁を調整して前記補助蒸気ヘッダ圧力が一定になるように制御することを特徴とする貫流ボイラの補助蒸気圧制御方法。
A superheater bypass valve for supplying a part of steam to a flash tank from a superheater provided upstream of the once-through boiler, a flash tank auxiliary steam pressure regulating valve for supplying steam generated in the flash tank to an auxiliary steam header, When the steam pressure of the auxiliary steam header is controlled to be constant by adjusting the opening of a low temperature reheat auxiliary steam pressure regulating valve that supplies a part of the steam of the low temperature reheat steam system to the auxiliary steam header, When the boiler load is less than 50%, the superheater bypass valve is opened, superheated steam is supplied to the flash tank and the flash tank auxiliary steam pressure regulating valve is adjusted, and when the boiler load is 50% or more, Close the superheater bypass valve and adjust the low temperature reheat auxiliary steam pressure control valve to keep the auxiliary steam header pressure constant. Auxiliary steam pressure control method once-through boiler and controlling the.
JP2004240968A 2004-08-20 2004-08-20 Auxiliary steam pressure control method for once-through boiler Pending JP2006057929A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103775132A (en) * 2012-10-25 2014-05-07 株式会社日立制作所 Subcritical pressure high-temperature steam power plant and subcritical pressure high-temperature variable pressure operation once-through boiler
CN104748097A (en) * 2015-04-10 2015-07-01 贵州电力试验研究院 Method for improving main steam temperature of super-critical once-through boiler
JP2017040201A (en) * 2015-08-19 2017-02-23 株式会社東芝 Power generation system and operation method for same
CN113431646A (en) * 2021-07-02 2021-09-24 华能巢湖发电有限责任公司 Auxiliary-steam-free isolated thermal state starting method for condensing type external heat supply unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103775132A (en) * 2012-10-25 2014-05-07 株式会社日立制作所 Subcritical pressure high-temperature steam power plant and subcritical pressure high-temperature variable pressure operation once-through boiler
US9784137B2 (en) 2012-10-25 2017-10-10 Mitsubishi Hitachi Power Systems, Ltd. Subcritical pressure high-temperature steam power plant and subcritical pressure high-temperature variable pressure operation once-through boiler
CN104748097A (en) * 2015-04-10 2015-07-01 贵州电力试验研究院 Method for improving main steam temperature of super-critical once-through boiler
CN104748097B (en) * 2015-04-10 2016-08-17 贵州电网有限责任公司电力科学研究院 A kind of method improving supercritical once-through boiler Stream temperature degree
JP2017040201A (en) * 2015-08-19 2017-02-23 株式会社東芝 Power generation system and operation method for same
US10876432B2 (en) 2015-08-19 2020-12-29 Kabushiki Kaisha Toshiba Combined cycle power system with an auxiliary steam header supplied by a flasher and a surplus steam leak
CN113431646A (en) * 2021-07-02 2021-09-24 华能巢湖发电有限责任公司 Auxiliary-steam-free isolated thermal state starting method for condensing type external heat supply unit

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