JP2000304205A - Steam temperature control device - Google Patents
Steam temperature control deviceInfo
- Publication number
- JP2000304205A JP2000304205A JP11112857A JP11285799A JP2000304205A JP 2000304205 A JP2000304205 A JP 2000304205A JP 11112857 A JP11112857 A JP 11112857A JP 11285799 A JP11285799 A JP 11285799A JP 2000304205 A JP2000304205 A JP 2000304205A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- water
- injection
- systems
- temperature reduced
- 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.)
- Granted
Links
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はボイラ等の蒸気温度
制御装置に係り、特にボイラ等で生成された蒸気ライン
中に、ノズルより減温水を霧化して注水するために、注
入ノズル、調節弁、及び遮断弁を含む減温水配管系統を
設けてなる蒸気温度制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam temperature control device for a boiler or the like, and more particularly, to an injection nozzle and a control valve for atomizing and cooling water from a nozzle into a steam line generated by the boiler or the like. And a steam temperature control device provided with a desuperheated water piping system including a shutoff valve.
【０００２】[0002]
【従来の技術】ボイラの蒸気温度特性は、ボイラ負荷、
使用燃料、空気過剰率やＧＲ量などの運転条件により変
化する。特に、高カロリー燃料と低カロリー燃料を使用
するようなボイラ、あるいはガスタービン排ガスを熱回
収する排ガスボイラ等については、蒸気温度特性が著し
く変化し、蒸気温度を制御するため蒸気ラインに注入さ
れる減温水の量は大幅に変化する。2. Description of the Related Art Steam temperature characteristics of a boiler include a boiler load,
It varies depending on operating conditions such as the fuel used, the excess air ratio and the GR amount. Particularly, for a boiler using high calorie fuel and low calorie fuel, or an exhaust gas boiler for heat recovery of gas turbine exhaust gas, the steam temperature characteristics change remarkably, and the steam is injected into a steam line to control the steam temperature. The amount of desuperheated water varies greatly.
【０００３】図２は、従来技術に係る蒸気等に注入され
る減温水制御機構を含むボイラの蒸気温度制御装置を示
し、公知のように復水器よりのボイラ水は給水ポンプ１
により圧送され、節炭器１２により加熱した後、蒸気ド
ラムと火炉からなるドラム型ボイラで加熱し、湿り蒸気
を生成した後、蒸気配管３２経路に配した過熱器１３及
び１４で過熱し、該過熱蒸気をタービンに供給する。か
かる装置において蒸気配管３２経路に注入する減温水の
制御機構は、同図に示すように通常、給水ポンプ１出口
から分岐管３１を介して減温水が抜き出される減温水配
管７は、蒸気配管３２の注入点迄１系統配置され、該減
温水配管７の系統上に遮断弁２、注水量を調整する調節
弁３、止め弁４及び蒸気配管３２の注入点位置に注入ノ
ズル５を設け、前記各種弁により減温水の注水量を制御
している。FIG. 2 shows a conventional steam temperature control device for a boiler including a desuperheated water control mechanism for injecting steam or the like into a steam or the like.
After heating by the economizer 12 and heating by a drum type boiler including a steam drum and a furnace, and generating wet steam, the steam is heated by superheaters 13 and 14 arranged in a steam pipe 32 path. Supply superheated steam to the turbine. In such a device, the control mechanism of the desuperheated water to be injected into the steam pipe 32 path is, as shown in the figure, usually the desuperheated water pipe 7 from which the desuperheated water is extracted from the outlet of the feedwater pump 1 via the branch pipe 31. A shutoff valve 2, a control valve 3 for adjusting the amount of injected water, a stop valve 4, and an injection nozzle 5 at the injection point of the steam pipe 32 are provided on the system of the desuperheated water pipe 7. The injection amount of the desuperheated water is controlled by the various valves.
【０００４】[0004]
【発明が解決しようとする課題】従って、前記従来技術
においては図３(Ｂ)に示すように、最終段の過熱器１４
出口の温度計６で検知した温度を制御装置に入力して調
節弁の開閉制御により減温水の注水量を制御している
が、減温水配管７の系統が一系統の為に、大幅に変化す
る負荷に対応する減温水の変動に対しては、調節弁３で
の制御範囲でカバーできなくなったり、又、注入ノズル
５については霧化特性の観点から十分な霧化ができなく
なる場合もある。Accordingly, in the above prior art, as shown in FIG.
The temperature detected by the thermometer 6 at the outlet is input to the control device to control the injection amount of desuperheated water by controlling the opening and closing of the control valve. However, since the system of the desuperheated water pipe 7 is one system, it greatly changes. There is a case where the fluctuation of the desuperheated water corresponding to the load to be applied cannot be covered by the control range of the control valve 3 or the injection nozzle 5 cannot be sufficiently atomized from the viewpoint of the atomization characteristics. .
【０００５】本発明はかかる課題に鑑み、蒸気温度特性
に応じ減温水注水の霧化特性が最適となるように減温水
注水系統を自動で幅広く制御できるボイラの蒸気温度制
御装置を提供することを目的とする。The present invention has been made in view of the above problems, and provides a steam temperature control device for a boiler capable of automatically and widely controlling a desuperheated water injection system so that atomization characteristics of desuperheated water injection are optimized according to steam temperature characteristics. Aim.
【０００６】[0006]
【課題を解決するための手段】本発明はかかる技術的課
題を解決するために、請求項１記載の発明において、ボ
イラ等で生成された蒸気ライン中に、ノズルより減温水
を霧化して注水するために、注入ノズル、調節弁、及び
遮断弁を含む減温水配管系統を設けてなる蒸気温度制御
装置において、夫々独立して減温水を蒸気ライン中に注
水する前記減温水配管系統を複数設けると共に、前記蒸
気ライン中の蒸気状態（負荷や蒸気温度等）に応じて前
記複数の減温水配管系統の入切制御と減温水の注入流量
制御を組合せて制御することを特徴とする。なお、前記
夫々の系統ラインの先頭に付ける注入ノズルはノズル単
体若しくは単体ノズルを複数個まとめたノズル群の場合
のいずれの場合も含む。According to the present invention, in order to solve the above-mentioned technical problem, in the invention according to the first aspect, water is injected by atomizing desuperheated water from a nozzle into a steam line generated by a boiler or the like. In order to do so, in a steam temperature control device provided with a cooling water piping system including an injection nozzle, a control valve, and a shutoff valve, a plurality of the cooling water piping systems for independently injecting cooling water into a steam line are provided. At the same time, according to a steam state (load, steam temperature, etc.) in the steam line, control is performed by combining on / off control of the plurality of desuperheated water piping systems and injection flow control of desuperheated water. The injection nozzle attached to the head of each of the system lines includes a single nozzle or a nozzle group including a plurality of single nozzles.
【０００７】即ちより具体的には、請求項２に記載のよ
うに、注入ノズルから蒸気中に投入される注水の霧化特
性が最適となるような蒸気温度特性を予め入力された制
御装置により、前記各減温水配管系統の遮断弁の開閉制
御を行なうことを特徴とする。そして好ましくは、請求
項３に記載のように、前記夫々の系統の注水ノズルを、
蒸気流れ断面で平行配列としたことを特徴とする。More specifically, as described in the second aspect, the control device is provided with a steam temperature characteristic previously input so that the atomization characteristic of the water injected into the steam from the injection nozzle is optimized. And controlling the opening and closing of the shut-off valve of each of the low-temperature water piping systems. And preferably, as described in claim 3, the water injection nozzle of each system,
It is characterized by being arranged in parallel in the steam flow section.
【０００８】[0008]
【作用】ボイラ等で生成された蒸気ライン中に、ノズル
より減温水を霧化して注水するために、注入ノズル、調
節弁、及び遮断弁を含む減温水配管系統を設けてなる蒸
気温度制御装置においては、注入圧力、注入量などによ
り、注入ノズルのノズル穴径、個数が選定されている。
しかしながら調節弁の制御により注入量が減少してくる
と霧化特性が低下してくる。The steam temperature control device is provided with a cooling water piping system including an injection nozzle, a control valve, and a shut-off valve in order to atomize the cooling water from the nozzle into the steam line generated by the boiler or the like. In, the nozzle hole diameter and the number of the injection nozzles are selected according to the injection pressure, the injection amount, and the like.
However, when the injection amount is reduced by controlling the control valve, the atomization characteristics are reduced.
【０００９】そして大幅に注入量が変化するようなボイ
ラでは当然、必要とされる霧化特性が保持できない状態
もあり、霧化されない注水はノズルから蒸気配管中にた
れ、蒸気配管を局所的に過冷却し、悪くすれば熱疲労の
原因ともなり得る。このような状態を避けるため、本発
明においては減温水配管系統を複数設け、減温水注入量
に応じて使用する減温水配管系統を段階的に増減させ
て、注入量に応じたノズル個数を使用するものである。[0009] In a boiler in which the injection amount is largely changed, the required atomization characteristics cannot be maintained in some cases, and the water that is not atomized is dripped from the nozzle into the steam pipe, and the steam pipe is locally discharged. Undercooling and worsening can cause thermal fatigue. In order to avoid such a situation, in the present invention, a plurality of desuperheated water piping systems are provided, and the number of nozzles according to the injection amount is increased by gradually increasing or decreasing the desuperheated water piping system used in accordance with the desuperheated water injection amount. Is what you do.
【００１０】更に夫々の減温水配管系統においても注入
量を制御する調節弁の流量制御も合わせ行なうことによ
り、一層緻密な注入量制御が可能となる。この場合、減
温水配管系統の遮断弁の入切については、あらかじめ蒸
気温度特性を制御装置に入力しておき、該制御装置より
の信号に基づいて遮断弁を自動で入切し、調節弁、ノズ
ルが最適な使用範囲となるようにするのがよい。これに
より、大幅に変化する減温水量に対し、複数の注入制御
ラインとして系統上の調節弁の制御範囲内で、ノズルの
霧化特性が良好な範囲内で使用できる。又請求項３に記
載のように、前記夫々の系統の注水ノズルを、蒸気流れ
断面で平行配列とすることでその蒸気ライン部分に集中
して減温水を供給出来るために、効果的な温度制御が可
能となる。Further, in each of the low-temperature water piping systems, the flow rate of the control valve for controlling the injection amount is also controlled, so that the injection amount can be controlled more precisely. In this case, regarding the on / off of the shut-off valve of the cooling water piping system, the steam temperature characteristic is input to the control device in advance, and the shut-off valve is automatically turned on / off based on a signal from the control device, and the control valve, It is preferable that the nozzle has an optimum use range. Thus, for a drastically changing amount of desuperheated water, a plurality of injection control lines can be used within the control range of the control valve on the system and within the range in which the atomization characteristics of the nozzle are good. Further, since the water injection nozzles of the respective systems are arranged in parallel in the steam flow cross section, the temperature-reducing water can be supplied to the steam line portion in a concentrated manner. Becomes possible.
【００１１】[0011]
【発明の実施の形態】以下、本発明を図に示した実施例
を用いて詳細に説明する。但し、この実施例に記載され
る構成部品の寸法、形状、その相対配置などは特に特定
的な記載がない限り、この発明の範囲をそれのみに限定
する趣旨ではなく単なる説明例に過ぎない。図１に本発
明の実施例に係るボイラの蒸気温度制御装置を示す。本
装置において、復水器よりのボイラ水が、給水ポンプ１
により圧送され、節炭器１２により加熱した後、蒸気ド
ラムと火炉からなるドラム型ボイラで加熱し、湿り蒸気
を生成した後、蒸気配管３２経路に配した過熱器１３及
び１４で過熱し、該過熱蒸気をタービンに供給する点は
前記従来技術と同様である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, unless otherwise specified, dimensions, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the invention, but are merely illustrative examples. FIG. 1 shows a steam temperature control device for a boiler according to an embodiment of the present invention. In this apparatus, the boiler water from the condenser is supplied to the feed pump 1
And heated by a drum-type boiler comprising a steam drum and a furnace, to generate wet steam, and then superheated by superheaters 13 and 14 arranged in a steam pipe 32 path. The point of supplying the superheated steam to the turbine is the same as that of the above-mentioned conventional technology.
【００１２】そして前記給水ポンプ１出口より抜き出さ
れた分岐管３１の下流側に設けた減温水配管７、７’は
本実施形態の場合は、完全な２系統とし、該夫々の系統
７、７’上に系統上流から遮断弁２、２’注水量を調整
する調節弁３、３’止め弁４、４’及び蒸気配管３２の
注入点位置に注入ノズル５、５’を夫々設ける。又前記
注入ノズル５、５’蒸気配管３２に平行に対面配置し、
蒸気流れ断面で平行配列とする。調節弁３は最終段の過
熱器１４出口の温度計６よりの検知温度や負荷等を加味
して制御装置８で調節される。In the case of the present embodiment, the temperature-reduced water pipes 7 and 7 'provided on the downstream side of the branch pipe 31 extracted from the outlet of the water supply pump 1 are completely two systems. On the 7 ', shut-off valves 2, 2' from the upstream of the system, control valves 3 for adjusting the water injection amount, 3 'stop valves 4, 4', and injection nozzles 5, 5 'are provided at injection point positions of the steam pipe 32, respectively. In addition, the injection nozzles 5 and 5 'are disposed facing each other in parallel to the steam pipe 32,
The steam flow cross-section is parallel. The control valve 3 is adjusted by the control device 8 in consideration of the temperature, load, and the like detected by the thermometer 6 at the outlet of the superheater 14 at the last stage.
【００１３】遮断弁２は、あらかじめ制御装置８に入力
された蒸気温度特性から制御され自動的に入切され注入
量に見合う系統数、即ち、注入ノズル５、５’の霧化範
囲、調節弁３の調節範囲内に入る系統数を選択出来るよ
うにしたものである。The shut-off valve 2 is controlled based on the steam temperature characteristic input to the controller 8 in advance, and is automatically turned on and off to match the injection amount, that is, the atomizing range of the injection nozzles 5 and 5 ', the control valve. The number of systems falling within the adjustment range of 3 can be selected.
【００１４】図３(Ａ)に蒸気温度制御を簡素化して表現
している本実施形態の作用系統図を示す。本実施形態に
於いて、完全に２系統化された注入制御配管７、７’ラ
イン上に調節弁３，３’と遮断弁２，２’が設けられて
いるが、過熱器１４出口の温度計６よりの蒸気温度と共
に、ボイラ負荷、その他蒸気温度制御量を検出し、あら
かじめ制御装置８内に入力された蒸気温度特性／選定系
統数８の関数から遮断弁２、２’の開閉を行ない、注入
ノズル５、５’の霧化範囲、調節弁３、３’の調整範囲
内に入るように系統数を選定するように制御する。FIG. 3A shows an operation system diagram of the present embodiment in which the steam temperature control is simplified and expressed. In the present embodiment, the control valves 3, 3 'and the shutoff valves 2, 2' are provided on the injection control pipes 7, 7 'which are completely divided into two lines. The boiler load and other steam temperature control amounts are detected together with the steam temperature from the total 6, and the shut-off valves 2, 2 'are opened and closed based on a function of the steam temperature characteristic / the number of selected systems 8 previously input into the controller 8. The number of systems is controlled so as to be within the atomization range of the injection nozzles 5 and 5 'and the adjustment range of the control valves 3 and 3'.
【００１５】即ち、例えば図１（Ｂ）に示すように、負
荷がａ％以下の場合は、一の遮断弁２のみ開き、一系統
により調節弁３を利用して出口温度が規定値となるよう
に最大ｂ1の減温水の注入量制御が行なわれる。そし
て、負荷がａ％以上に上昇した場合は、第二の遮断弁
２’をも開き、二系統により夫々の調節弁３、３’を利
用して出口温度が規定値となるように、最大（ｂ1＋
ｂ2）の減温水の注入量制御が行なわれる。That is, as shown in FIG. 1B, for example, when the load is a% or less, only one shutoff valve 2 is opened, and the outlet temperature reaches a specified value by using the control valve 3 by one system. injection amount control reduced hot water up to b 1 is performed as. When the load rises to a% or more, the second shut-off valve 2 'is also opened, and the maximum temperature is adjusted so that the outlet temperature becomes the specified value by using the respective control valves 3, 3' by two systems. (B 1 +
injection amount control reduced hot water b 2) is performed.
【００１６】[0016]
【発明の効果】以上記載のごとく、本発明によれば、複
数の系統を選択的に開閉制御しながら注入ノズルの霧化
範囲内で運用されるため、例えば霧化出来ず注入が蒸気
配管内に垂れ、これが原因で蒸気配管の熱疲労などのト
ラブルを防止できる。又請求項２記載の発明によれば、
蒸気温度特性に応じ自動的に注入系統数を選定できると
共に、負荷に応じて減温水量の適切な調整を自動的に行
なうことができる。又、請求項３に記載の発明によれ
ば、蒸気ライン部分に集中して減温水を供給出来るため
に、効果的な温度制御が可能となる。As described above, according to the present invention, since a plurality of systems are operated within the atomization range of the injection nozzle while selectively opening and closing the system, for example, atomization cannot be performed and injection is performed in the steam pipe. This can prevent troubles such as thermal fatigue of the steam pipe. According to the second aspect of the present invention,
The number of injection systems can be automatically selected according to the steam temperature characteristics, and the appropriate amount of desuperheated water can be automatically adjusted according to the load. Further, according to the third aspect of the present invention, since the temperature-reduced water can be supplied to the steam line portion in a concentrated manner, effective temperature control becomes possible.
【図１】 （Ａ）に本発明の実施例に係るボイラの蒸気
温度制御装置を、（Ｂ）にボイラ負荷（蒸気量）と減温
水注入量の関係をグラフ化した蒸気温度特性図を示す。FIG. 1A shows a steam temperature control device for a boiler according to an embodiment of the present invention, and FIG. 1B shows a steam temperature characteristic diagram in which the relationship between a boiler load (steam amount) and a cooling water injection amount is graphed. .
【図２】 従来技術に係る蒸気等に注入される減温水制
御機構を含むボイラの蒸気温度制御装置を示す。FIG. 2 shows a steam temperature control device of a boiler including a desuperheated water control mechanism for injecting steam or the like according to a conventional technique.
【図３】 (Ａ)に蒸気温度制御を簡素化して表現してい
る本実施形態の作用系統図を、（Ｂ）は図２の従来技術
の作用系統図を示す。3 (A) shows an operation system diagram of the present embodiment in which steam temperature control is simplified and shown, and FIG. 3 (B) shows an operation system diagram of the prior art of FIG.
１ 給水ポンプ ２、２’ 遮断弁 ３、３’ 調節弁 ４、４’ 止め弁 ５、５’ 注入ノズル ６ 蒸気温度検出計 ７、７’ 減温水配管ライン ８ 制御装置 DESCRIPTION OF SYMBOLS 1 Water supply pump 2, 2 'Shut-off valve 3, 3' Control valve 4, 4 'Stop valve 5, 5' Injection nozzle 6 Steam temperature detector 7, 7 'Reduced temperature water piping line 8 Control device
Claims (3)
ノズルより減温水を霧化して注水するために、注入ノズ
ル、調節弁、及び遮断弁を含む減温水配管系統を設けて
なる蒸気温度制御装置において、 夫々独立して減温水を蒸気ライン中に注水する前記減温
水配管系統を複数設けると共に、前記蒸気ライン中の負
荷や蒸気温度等の蒸気状態に応じて前記複数の減温水配
管系統の入切制御と減温水の注入流量制御を組合せて制
御することを特徴とする蒸気温度制御装置。1. In a steam line generated by a boiler or the like,
In order to atomize the desuperheated water from the nozzle and inject it, in the steam temperature control device which is equipped with a desuperheated water piping system including an injection nozzle, a control valve, and a shutoff valve, the dewatered water is independently injected into the steam line A plurality of said desuperheated water piping systems are provided, and a combination of on / off control of said plurality of desuperheated water piping systems and injection flow control of desuperheated water is controlled in accordance with a steam state such as a load in the steam line or a steam temperature. A steam temperature control device, characterized in that:
の霧化特性が最適となるような蒸気温度特性を予め入力
された制御装置により、前記各減温水配管系統の遮断弁
の開閉制御を行なうことを特徴とする請求項１記載の蒸
気温度制御装置。2. A control device in which a steam temperature characteristic is input in advance so that an atomization characteristic of water injected into the steam from an injection nozzle is optimized. The steam temperature control apparatus according to claim 1, wherein the control is performed.
れ断面で平行配列としたことを特徴とする請求項１記載
の蒸気温度制御装置。3. The steam temperature control device according to claim 1, wherein the water injection nozzles of the respective systems are arranged in parallel in a steam flow section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11285799A JP3746634B2 (en) | 1999-04-20 | 1999-04-20 | Steam temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11285799A JP3746634B2 (en) | 1999-04-20 | 1999-04-20 | Steam temperature control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000304205A true JP2000304205A (en) | 2000-11-02 |
| JP3746634B2 JP3746634B2 (en) | 2006-02-15 |
Family
ID=14597281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11285799A Expired - Fee Related JP3746634B2 (en) | 1999-04-20 | 1999-04-20 | Steam temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3746634B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432157A (en) * | 2020-11-18 | 2021-03-02 | 哈尔滨锅炉厂有限责任公司 | Method for monitoring vaporization degree of desuperheating water |
-
1999
- 1999-04-20 JP JP11285799A patent/JP3746634B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432157A (en) * | 2020-11-18 | 2021-03-02 | 哈尔滨锅炉厂有限责任公司 | Method for monitoring vaporization degree of desuperheating water |
| CN112432157B (en) * | 2020-11-18 | 2022-12-06 | 哈尔滨锅炉厂有限责任公司 | Method for monitoring vaporization degree of desuperheating water |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3746634B2 (en) | 2006-02-15 |
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