JP2001215001A - Boiler feed water controlling method and boiler feed water mechanism - Google Patents
Boiler feed water controlling method and boiler feed water mechanismInfo
- Publication number
- JP2001215001A JP2001215001A JP2000024896A JP2000024896A JP2001215001A JP 2001215001 A JP2001215001 A JP 2001215001A JP 2000024896 A JP2000024896 A JP 2000024896A JP 2000024896 A JP2000024896 A JP 2000024896A JP 2001215001 A JP2001215001 A JP 2001215001A
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- temperature
- boiler
- water supply
- amount
- 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
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、ボイラ給水制御方
法及びボイラ給水機構に関し、詳しくは、燃焼炉で生成
する燃焼ガスの保有熱を回収する伝熱管を、前記燃焼ガ
スを導く煙道に配置してあるボイラに、ボイラ給水を、
前記煙道の下流側に配置した前記伝熱管で構成される節
炭器を経て供給するボイラ給水機構におけるボイラ給水
制御方法、及び燃焼炉で生成する燃焼ガスを導く煙道に
伝熱管を配置して、前記燃焼ガスの保有熱を回収するボ
イラに、ボイラ給水を、前記伝熱管のうちで前記煙道の
下流側に配置した伝熱管で構成される節炭器を経て供給
する給水路を備えるボイラ給水機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler feedwater control method and a boiler feedwater mechanism, and more particularly, to a heat transfer tube for recovering retained heat of a combustion gas generated in a combustion furnace, in a flue for guiding the combustion gas. Boiler water supply to the boiler
A boiler water supply control method in a boiler water supply mechanism that supplies the fuel gas through a economizer composed of the heat transfer tubes disposed downstream of the flue, and a heat transfer tube disposed in a flue that guides combustion gas generated in a combustion furnace. A boiler for recovering the heat retained by the combustion gas, the boiler being provided with a water supply passage for supplying boiler water through a economizer composed of heat transfer tubes arranged downstream of the flue among the heat transfer tubes. It relates to a boiler water supply mechanism.
【０００２】[0002]
【従来の技術】従来、燃焼炉においては、ゴミ焼却炉を
例に挙げて説明すると、図５に示すように、投入された
被処理物を搬送しながら焼却処理するストーカ式火床２
を備える火炉で生成する燃焼ガスを導く煙道３に伝熱管
７を配置して、前記煙道３の下流側に向けて、前記燃焼
ガスを下方に案内する第１パスに配置され、前記燃焼ガ
スの保有熱を回収するボイラ４と、前記第１パスからの
燃焼ガスを上方に案内する第２パスに配置され、前記ボ
イラ４で生成した蒸気を過熱する過熱器５と、前記第２
パスからの排ガスを下方に案内する第３パスに配置さ
れ、前記ボイラ４への給水を予熱する節炭器６とを順に
形成してある。そして、前記過熱器５からの過熱蒸気に
より駆動される蒸気タービン８Ｂに結合した発電機８Ａ
を備える発電設備８を備えている。前記蒸気タービン８
Ｂを駆動した後の蒸気は復水器８Ｃに導かれ、その復水
器８Ｃで凝縮し、ボイラ４に還流するための凝縮水とし
て復水タンク９に一時貯留される。さらに、その復水タ
ンク９に貯留された凝縮蒸気をボイラ給水として前記節
炭器６を経て供給する給水路１８にボイラ給水ポンプ１
９を備えるボイラ給水機構１０を設けてある。前記ボイ
ラ給水機構１０には、前記復水タンク９からの凝縮水を
供給する給水ポンプ１２を備える凝縮水供給路１１を設
けて、前記凝縮水を蒸気加熱して脱気する脱気器１３に
接続してあり、前記凝縮水は、脱気した後、前記脱気器
１３から前記給水路１８に設けた前記ボイラ給水ポンプ
１９により前記ボイラ給水として前記節炭器６経由で前
記ボイラ４に供給される。2. Description of the Related Art Conventionally, a stoker type grate 2 for performing incineration while transporting an object to be treated as shown in FIG.
A heat transfer tube 7 is arranged in a flue 3 for guiding a combustion gas generated in a furnace provided with a furnace, and is disposed in a first path for guiding the combustion gas downward toward the downstream side of the flue 3, A boiler 4 for recovering the retained heat of the gas, a superheater 5 disposed in a second pass for guiding the combustion gas from the first pass upward, and superheating steam generated in the boiler 4;
A third economizer is disposed in a third pass for guiding the exhaust gas from the pass downward, and is sequentially formed with a economizer 6 for preheating the water supply to the boiler 4. A generator 8A coupled to a steam turbine 8B driven by superheated steam from the superheater 5
The power generation equipment 8 is provided with: The steam turbine 8
The steam after driving B is guided to the condenser 8C, condensed in the condenser 8C, and temporarily stored in the condenser tank 9 as condensed water for returning to the boiler 4. Further, the boiler feed pump 1 is connected to a water supply passage 18 for supplying the condensed steam stored in the condensate tank 9 as boiler feed water through the economizer 6.
9 is provided with a boiler water supply mechanism 10. The boiler water supply mechanism 10 is provided with a condensed water supply path 11 having a water supply pump 12 for supplying condensed water from the condensate tank 9 to a deaerator 13 that heats and degass the condensed water by steam. After being degassed, the condensed water is supplied from the deaerator 13 to the boiler 4 as the boiler water via the economizer 6 by the boiler water pump 19 provided in the water supply passage 18. Is done.
【０００３】[0003]
【発明が解決しようとする課題】上記従来のボイラ給水
機構１０においては、脱気後のボイラ給水温度を安定し
て維持するために、前記脱気器１３の脱気室１４に加熱
蒸気を供給して前記凝縮水を加熱するように構成してあ
る。しかしながら、前記節炭器６の入口温度を一定に維
持してある場合に、前記燃焼ガス中の灰分や未燃分が前
記伝熱管７の伝熱面に付着したりして前記伝熱面に汚れ
が生ずると、前記伝熱管７における熱伝達係数が低下す
る結果、前記燃焼ガスの保有熱が十分に回収できなくな
り、前記ボイラ４からの蒸気発生量に変動を引き起こし
て、ゴミ発電プラントの発電量を安定して維持できなく
なるという問題を有している。そこで、本発明のボイラ
給水制御方法及びボイラ給水機構は、上記の問題点を解
決し、伝熱管の伝熱面に汚れが生じても蒸気発生量の変
動を抑制できる手段を提供することを目的とする。In the conventional boiler water supply mechanism 10 described above, heated steam is supplied to the deaeration chamber 14 of the deaerator 13 in order to stably maintain the boiler supply water temperature after deaeration. Then, the condensed water is heated. However, when the inlet temperature of the economizer 6 is kept constant, ash and unburned components in the combustion gas adhere to the heat transfer surface of the heat transfer tube 7 and When the contamination occurs, the heat transfer coefficient in the heat transfer tube 7 decreases, so that the heat retained in the combustion gas cannot be sufficiently recovered, and the amount of steam generated from the boiler 4 fluctuates. There is a problem that the amount cannot be maintained stably. Therefore, a boiler water supply control method and a boiler water supply mechanism of the present invention solve the above-mentioned problems, and an object thereof is to provide a means capable of suppressing a change in the amount of steam generated even if the heat transfer surface of the heat transfer tube becomes contaminated. And
【０００４】[0004]
【０００５】〔本発明の特徴手段〕本発明に係るボイラ
給水制御方法は、燃焼炉で生成する燃焼ガスの保有熱を
回収する伝熱管を、前記燃焼ガスを導く煙道に配置して
あるボイラに、ボイラ給水を、前記煙道の下流側に配置
した前記伝熱管で構成される節炭器を経て供給するボイ
ラ給水機構において、前記伝熱管における伝熱面の汚れ
を検出して、前記汚れに起因する熱伝達量の変化を抑制
して前記伝熱管の汚れを補完する点に特徴を有するもの
であり、夫々に以下のような特徴を備えるものである。[0005] The boiler feedwater control method according to the present invention provides a boiler in which a heat transfer tube for recovering retained heat of a combustion gas generated in a combustion furnace is disposed in a flue for guiding the combustion gas. In a boiler water supply mechanism for supplying boiler water through a economizer made up of the heat transfer tubes disposed downstream of the flue, detecting dirt on the heat transfer surface of the heat transfer tubes, The characteristic feature is that a change in the amount of heat transfer caused by the above is suppressed to complement the contamination of the heat transfer tube, and each has the following features.
【０００６】上記の目的のための本発明のボイラ給水制
御方法の第１特徴手段は、請求項１に記載の如く、伝熱
管における熱伝達量の変化を検出して、前記熱伝達量が
変化したと判断した場合に、その熱伝達量の変化に応じ
て、節炭器の入口給水温度を変化させる点にある。The first characteristic means of the boiler water supply control method of the present invention for the above object detects the change of the heat transfer amount in the heat transfer tube and changes the heat transfer amount. If it is determined that the heat transfer amount has changed, the inlet feedwater temperature of the economizer is changed according to the change in the heat transfer amount.
【０００７】上記の目的のための本発明のボイラ給水制
御方法の第２特徴手段は、請求項２に記載の如く、前記
第１特徴手段における熱伝達量の変化を検出するのに、
煙道で、節炭器の出口における節炭器出口排ガス温度を
検出し、前記予熱器出口排ガス温度が予め設定された標
準出口温度範囲から上方に逸脱した場合に、前記節炭器
の入口給水温度を、予め設定された標準給水温度よりも
低くする点にある。According to a second aspect of the boiler feedwater control method of the present invention for the above object, as set forth in the second aspect, the method for detecting a change in the amount of heat transfer in the first aspect means comprises:
In the stack, the temperature of the exhaust gas at the outlet of the economizer is detected at the outlet of the economizer, and when the exhaust gas temperature of the preheater deviates upward from a preset standard outlet temperature range, the water supply at the inlet of the economizer is performed. The point is that the temperature is lower than a preset standard supply water temperature.
【０００８】上記の目的のための本発明のボイラ給水制
御方法の第３特徴手段は、請求項３に記載の如く、前記
第１特徴手段における熱伝達量の変化を検出するのに、
ボイラにおける蒸気発生量を検出し、前記蒸気発生量が
予め設定された標準蒸気発生量の範囲から下方に逸脱し
た場合に、節炭器の入口給水温度を、予め設定された標
準給水温度よりも低くする点にある。According to a third aspect of the boiler feedwater control method of the present invention for the above-mentioned object, as set forth in the third aspect, the method for detecting a change in the amount of heat transfer in the first aspect means comprises:
Detecting the steam generation amount in the boiler, and when the steam generation amount deviates downward from the range of the preset standard steam generation amount, sets the inlet feedwater temperature of the economizer to be lower than the preset standard feedwater temperature. The point is to lower it.
【０００９】〔本発明の特徴構成〕本発明に係るボイラ
給水機構は、燃焼炉で生成する燃焼ガスを導く煙道に伝
熱管を配置して、前記燃焼ガスの保有熱を回収するボイ
ラに、ボイラ給水を、前記伝熱管のうちで前記煙道の下
流側に配置した伝熱管で構成される節炭器を経て供給す
る給水路を備えるボイラ給水機構において、前記伝熱管
における熱伝達量の変化を検出する熱伝達量変化検出手
段を設けて、その検出した熱伝達量の変化方向に応じて
入口給水温度を変化させる点に特徴を有するものであ
り、夫々に以下のような特徴を備えるものである。[0009] The boiler water supply mechanism according to the present invention includes a heat transfer pipe disposed in a flue for introducing combustion gas generated in a combustion furnace, and a boiler for recovering heat retained in the combustion gas. In a boiler water supply mechanism provided with a water supply passage that supplies boiler water through a heat saver formed of a heat transfer tube disposed downstream of the flue among the heat transfer tubes, a change in heat transfer amount in the heat transfer tubes Is provided with a heat transfer amount change detecting means for detecting the temperature of the inlet water supply in accordance with the change direction of the detected heat transfer amount, each having the following characteristics. It is.
【００１０】上記の目的のための本発明のボイラ給水機
構の第１特徴構成は、請求項４に記載の如く、伝熱管に
おける熱伝達量の変化を検出する熱伝達量変化検出手段
と、節炭器の入口における入口給水温度を設定自在な給
水温度設定手段と、前記給水温度設定手段において設定
された入口給水温度を調節する設定温度調節手段とを設
けて、前記設定温度調節手段を、前記熱伝達量変化検出
手段からの熱伝達量変化信号の入力を受けて、前記熱伝
達量の変化方向に応じて、前記入口給水温度を予め設定
された標準給水温度よりも高く又は低く調節するように
構成してある点にある。A first characteristic configuration of the boiler water supply mechanism of the present invention for the above object is a heat transfer amount change detecting means for detecting a change in a heat transfer amount in a heat transfer tube, as described in claim 4. A feedwater temperature setting means capable of setting an inlet feedwater temperature at an inlet of a charcoal device, and a set temperature adjusting means for adjusting an inlet feedwater temperature set in the feedwater temperature setting means are provided. Upon receiving an input of the heat transfer amount change signal from the heat transfer amount change detecting means, the inlet feedwater temperature is adjusted to be higher or lower than a preset standard feedwater temperature in accordance with the change direction of the heat transfer amount. The point is that it is configured.
【００１１】上記の目的のための本発明のボイラ給水機
構の第２特徴構成は、請求項５に記載の如く、前記第１
特徴構成において、煙道における節炭器の出口部に、節
炭器出口排ガス温度を検出する排ガス温度検出手段を配
置して、熱伝達量変化検出手段を、前記節炭器出口排ガ
ス温度が予め設定された標準出口温度範囲から上方に逸
脱した場合に熱伝達量低下信号を発信するように構成し
て、設定温度調節手段により、前記入口給水温度を予め
設定された標準給水温度よりも低く調節するように構成
してある点にある。[0011] A second characteristic configuration of the boiler water supply mechanism of the present invention for the above object is as described in claim 5.
In the characteristic configuration, at the outlet of the economizer in the flue, exhaust gas temperature detecting means for detecting an economizer outlet exhaust gas temperature is arranged, and a heat transfer amount change detecting means is provided. A heat transfer amount lowering signal is transmitted when the temperature deviates upward from the set standard outlet temperature range, and the inlet water temperature is adjusted to be lower than a preset standard water temperature by a set temperature adjusting means. The point is that it is configured.
【００１２】上記の目的のための本発明のボイラ給水機
構の第３特徴構成は、請求項６に記載の如く、前記第１
特徴構成において、ボイラの出口における蒸気流量を検
出する発生蒸気量検出手段を設けて、熱伝達量変化検出
手段を、前記発生蒸気量検出手段で検出した蒸気流量が
予め設定された標準蒸気発生量の範囲から下方に逸脱し
た場合に熱伝達量低下信号を発信するように構成して、
設定温度調節手段により、前記入口給水温度を予め設定
された標準給水温度よりも低く調節するように構成して
ある点にある。[0012] A third characteristic configuration of the boiler water supply mechanism of the present invention for the above object is as described in claim 6.
In the characteristic configuration, a generated steam amount detecting means for detecting a steam flow rate at an outlet of the boiler is provided, and a heat transfer amount change detecting means is provided as a standard steam generation amount in which the steam flow rate detected by the generated steam amount detecting means is set in advance. Is configured to transmit a heat transfer amount reduction signal when deviating downward from the range of
The present invention is characterized in that the set temperature adjusting means is configured to adjust the inlet water temperature to be lower than a preset standard water temperature.
【００１３】〔特徴手段の作用及び効果〕上記本発明に
係るボイラ給水制御方法によれば、節炭器、ボイラ、蒸
気過熱器それぞれを構成する伝熱管の汚れを検出すると
ともに、その汚れに起因する熱伝達量の変化を抑制する
ように、熱流束を調節するものであって、夫々に、以下
のような独特の作用効果を奏する。According to the boiler water supply control method of the present invention, the dirt on the heat transfer tubes constituting each of the economizer, the boiler, and the steam superheater is detected, and the dirt caused by the dirt is detected. The heat flux is adjusted so as to suppress the change in the amount of heat transfer, which has the following unique effects.
【００１４】上記本発明に係るボイラ給水制御方法の第
１特徴手段によれば、熱伝達量が変化したと判断した場
合には、その変化を相殺する方向に伝熱管における熱流
束を調整するべく前記伝熱管における高温側と低温側と
の間の対数平均温度差を調節するのである。その結果、
伝熱面における熱流束が調節されて、所定の熱伝達量に
維持できるようになるのである。According to the first characteristic means of the boiler water supply control method according to the present invention, when it is determined that the heat transfer amount has changed, the heat flux in the heat transfer tube is adjusted so as to cancel the change. The logarithmic average temperature difference between the high temperature side and the low temperature side of the heat transfer tube is adjusted. as a result,
The heat flux at the heat transfer surface is adjusted so that a predetermined heat transfer amount can be maintained.
【００１５】上記本発明に係るボイラ給水制御方法の第
２特徴手段によれば、上記第１特徴手段における作用効
果を奏する中で、炉内温度が定常状態にあるとすれば、
節炭器出口排ガス温度が標準出口温度範囲よりも上方に
逸脱する場合には、伝熱管の平均的な熱流束が減少して
いると判断できるから、ボイラ出口のガス温度を検出す
るまでもなく前記ボイラにおける熱伝達量の減少が検知
でき、この熱流束を増大させるために、節炭器入口への
入口給水温度を低下させるのである。その結果、伝熱管
における伝熱面に対する高温側と低温側との間の対数平
均温度差が増大して、熱流束を増大できるのである。According to the second characteristic means of the boiler water supply control method according to the present invention, if the furnace temperature is in a steady state while the effects of the first characteristic means are exhibited,
When the exhaust gas temperature at the outlet of the economizer deviates above the standard outlet temperature range, it can be determined that the average heat flux of the heat transfer tube has decreased, so it is not necessary to detect the gas temperature at the boiler outlet. A decrease in the amount of heat transfer in the boiler can be detected, and in order to increase this heat flux, the inlet feedwater temperature to the economizer inlet is lowered. As a result, the logarithmic average temperature difference between the high temperature side and the low temperature side with respect to the heat transfer surface of the heat transfer tube increases, and the heat flux can be increased.
【００１６】上記本発明に係るボイラ給水制御方法の第
３特徴手段によれば、上記第１特徴手段における作用効
果を奏する中で、炉内温度が定常状態にあるとすれば、
ボイラにおける蒸気発生量の低下は少なくともボイラ伝
熱管における熱流束の減少を示しており、この熱流束を
増大させるために、節炭器入口への入口給水温度を低下
させるのである。その結果、伝熱管における伝熱面に対
する高温側と低温側との間の対数平均温度差が増大し
て、熱流束を増大できるのである。According to the third aspect of the boiler feedwater control method according to the present invention, if the furnace temperature is in a steady state while the operation and effect of the first aspect are exhibited,
A decrease in the amount of steam generated in the boiler indicates at least a decrease in the heat flux in the boiler heat transfer tubes, and in order to increase the heat flux, the inlet feedwater temperature to the economizer inlet is reduced. As a result, the logarithmic average temperature difference between the high temperature side and the low temperature side with respect to the heat transfer surface of the heat transfer tube increases, and the heat flux can be increased.
【００１７】〔特徴構成の作用及び効果〕上記本発明に
係るボイラ給水機構によれば、熱伝達量変化検出手段の
より検出した伝熱管における熱伝達量の変化に対応して
節炭器に供給する入口給水温度を変化させることで、前
記伝熱管における熱流束を変化させて伝熱量の変化を相
殺するもので、夫々に、以下のような独特の作用効果を
奏する。According to the boiler water supply mechanism of the present invention, the water is supplied to the economizer in accordance with the change in the heat transfer amount in the heat transfer tube detected by the heat transfer amount change detecting means. By changing the inlet feedwater temperature, the heat flux in the heat transfer tube is changed to offset the change in the amount of heat transfer, and each has the following unique operation and effect.
【００１８】上記本発明に係るボイラ給水機構の第１特
徴構成によれば、熱伝達量変化検出手段により伝熱管に
おける熱伝達量の変化を検出し、その変化に応じて、そ
の変化を相殺するように入口給水温度を調節して、前記
伝熱管における伝熱面に対する高温側と低温側との間の
対数平均温度差を調節し、前記伝熱管における熱流束を
変化させるのである。その結果、例えば前記伝熱管の伝
熱面に汚れが生じて熱貫流係数が低下したとしても、前
記伝熱面の両側の温度差を高くすることにより、熱流束
を増大できて、ボイラの蒸気発生量を安定して維持でき
るのである。According to the first characteristic configuration of the boiler water supply mechanism according to the present invention, the change in the heat transfer amount in the heat transfer tube is detected by the heat transfer amount change detecting means, and the change is canceled according to the change. By adjusting the inlet feedwater temperature in this way, the logarithmic average temperature difference between the high temperature side and the low temperature side with respect to the heat transfer surface in the heat transfer tube is adjusted, and the heat flux in the heat transfer tube is changed. As a result, for example, even if the heat transfer surface of the heat transfer tube becomes contaminated and the heat transmission coefficient decreases, the heat flux can be increased by increasing the temperature difference on both sides of the heat transfer surface, and the steam of the boiler can be increased. The amount generated can be maintained stably.
【００１９】上記本発明に係るボイラ給水機構の第２特
徴構成によれば、上記第１特徴構成の作用効果を奏する
中で、節炭器出口排ガス温度が上昇すれば、伝熱管の平
均熱流束が減少していると判断でき、ボイラ出口におけ
るガス温度を検出するまでもなく、前記ボイラにおける
熱流束の減少が検知でき、熱伝達量変化検出手段から熱
伝達量低下信号を発するのである。これを受信して設定
温度調節手段で入口給水温度を標準給水温度よりも低く
調節すれば、伝熱管における熱流束を増加できて、ボイ
ラにおける蒸気発生量の減少を防止できるのである。According to the second characteristic configuration of the boiler water supply mechanism according to the present invention, if the temperature of the exhaust gas at the outlet of the economizer rises while the operation and effect of the first characteristic configuration are exhibited, the average heat flux of the heat transfer tube is increased. Can be determined to be reduced, and the heat flux in the boiler can be detected without detecting the gas temperature at the boiler outlet, and a heat transfer amount reduction signal is issued from the heat transfer amount change detecting means. If this is received and the inlet feedwater temperature is adjusted to be lower than the standard feedwater temperature by the set temperature adjusting means, the heat flux in the heat transfer tube can be increased, and a decrease in the amount of steam generated in the boiler can be prevented.
【００２０】上記本発明に係るボイラ給水機構の第３特
徴構成によれば、上記第１特徴構成の作用効果を奏する
中で、発生蒸気量検出手段により検出した蒸気流量が標
準蒸気発生量の範囲から下方に逸脱する場合には、ボイ
ラの伝熱管における熱流束が減少していることが検知で
きるから、熱伝達量変化検出手段から熱伝達量低下信号
を発するのである。これを受信して設定温度調節手段で
入口給水温度を標準給水温度よりも低く調節すれば、伝
熱管における熱流束を増加できて、ボイラにおける蒸気
発生量の減少を防止できるのである。According to the third feature configuration of the boiler water supply mechanism according to the present invention, in the operation and effect of the first feature configuration, the steam flow rate detected by the generated steam amount detection means is within the range of the standard steam generation amount. In the case of deviating downward from the above, since it can be detected that the heat flux in the heat transfer tube of the boiler has decreased, a heat transfer amount decrease signal is issued from the heat transfer amount change detecting means. If this is received and the inlet feedwater temperature is adjusted to be lower than the standard feedwater temperature by the set temperature adjusting means, the heat flux in the heat transfer tube can be increased, and a decrease in the amount of steam generated in the boiler can be prevented.
【００２１】[0021]
【発明の実施の形態】上記本発明の実施の形態の一例に
ついて、以下に、燃焼炉としてゴミ焼却炉を例に挙げ
て、図面を参照しながら説明する。尚、先の図５に示し
て説明した要素と同一又は同様の機能を有する要素につ
いては、同一の符号を付して説明の一部を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, taking a garbage incinerator as an example of a combustion furnace. Elements having the same or similar functions as / to those described with reference to FIG. 5 are denoted by the same reference numerals, and a part of the description will be omitted.
【００２２】本発明に係る燃焼炉は、図１に示すよう
に、燃焼炉１の一例であるゴミ焼却炉１Ａで生成する燃
焼ガスを導く煙道３に、前記燃焼ガスの保有熱を回収す
るボイラ４と、そのボイラ４で生成した蒸気を過熱する
過熱器５と、前記ボイラ４に供給されるボイラ給水を予
熱する節炭器６とを、夫々の伝熱管７であるボイラ伝熱
管７Ａと、過熱器伝熱管７Ｂと、節炭器伝熱管７Ｃと
を、前記煙道３に、下流側に向けて順に配置し、配管接
続して設けてある。つまり、前記ボイラ給水は、前記節
炭器伝熱管７Ｃを介して予め所定温度に予熱されて前記
ボイラ４に供給されるのである。In the combustion furnace according to the present invention, as shown in FIG. 1, the heat retained in the combustion gas is recovered in a flue 3 for guiding the combustion gas generated in a refuse incinerator 1A, which is an example of the combustion furnace 1. A boiler 4, a superheater 5 for superheating steam generated by the boiler 4, and a economizer 6 for preheating boiler feedwater supplied to the boiler 4 are each provided with a boiler heat transfer tube 7A as a heat transfer tube 7. The superheater heat transfer pipe 7B and the economizer heat transfer pipe 7C are arranged in the flue 3 in order toward the downstream side, and are connected by piping. In other words, the boiler feedwater is preheated to a predetermined temperature through the economizer heat transfer tube 7C and supplied to the boiler 4.
【００２３】また、前記過熱器５からの過熱蒸気により
駆動される発電設備８に備える蒸気タービン８Ｂからの
復水を一時貯留する復水タンク９からの凝縮水供給路１
１と前記節炭器６への給水路１８との間に設けられた脱
気器１３には、その脱気室１４に加熱蒸気を供給して前
記復水タンク９からの凝縮水を飽和蒸気温度まで加熱し
て脱気する蒸気を供給する蒸気供給路１５を接続してあ
る。前記脱気室１４には脱気圧力検出手段２４を設けて
あり、前記蒸気供給路１５には、前記脱気圧力検出手段
２４で検出する前記脱気室１４の脱気圧力を所定の圧力
に維持するように、供給蒸気圧調節弁１６を設けてあ
る。前記脱気室１４内で脱気された凝縮水は、予め設定
された標準給水温度に維持されて下方の脱気器タンク１
７に流下し、ボイラ給水として、ボイラ給水ポンプ１９
により前記給水路１８から前記節炭器６に送り込まれ
る。こうした構成で、前記節炭器６には、前記加熱蒸気
のより加熱され、脱気されたボイラ給水が供給され、前
記節炭器伝熱管７Ｃを通過する際に前記煙道３の排ガス
の熱により予熱された後、前記ボイラ４に供給されるの
である。A condensed water supply passage 1 from a condensate tank 9 for temporarily storing condensed water from a steam turbine 8B provided in a power generation facility 8 driven by superheated steam from the superheater 5
Heating steam is supplied to a degassing chamber 14 of a deaerator 13 provided between the fuel cell 1 and a water supply path 18 to the economizer 6 so that condensed water from the condensate tank 9 is saturated with steam. A steam supply path 15 for supplying steam which is heated to a temperature and degassed is connected. The degassing chamber 14 is provided with degassing pressure detecting means 24, and the steam supply path 15 is configured to reduce the degassing pressure of the degassing chamber 14 detected by the degassing pressure detecting means 24 to a predetermined pressure. A supply steam pressure regulating valve 16 is provided to maintain the pressure. The condensed water deaerated in the deaeration chamber 14 is maintained at a preset standard water supply temperature, and the lower deaerator tank 1
7 and as boiler feed water, boiler feed pump 19
Thus, the water is sent from the water supply passage 18 to the economizer 6. With such a configuration, the boiler feed water heated and degassed by the heating steam is supplied to the economizer 6, and the heat of the exhaust gas of the flue 3 when passing through the economizer heat transfer pipe 7 </ b> C is supplied. After being preheated by the boiler 4, it is supplied to the boiler 4.
【００２４】さらに、本発明に独特の構成として、前記
伝熱管７における熱伝達量の変化を検出する熱伝達量変
化検出手段２０と、前記節炭器６の入口における入口給
水温度を設定自在な給水温度設定手段２２と、その給水
温度設定手段２２において設定された入口給水温度を調
節する設定温度調節手段２３とを設ける。前記熱伝達量
の変化を検出するために、前記煙道３における前記節炭
器６の出口部に、その節炭器６を通過した排ガスの節炭
器出口排ガス温度を検出する排ガス温度検出手段２１を
配置して、前記節炭器出口排ガス温度が予め設定された
標準出口温度範囲から逸脱した場合に前記設定温度調節
手段２３に向けて熱伝達量変化信号を発信するように前
記熱伝達量変化検出手段２０を構成する。そして、前記
設定温度調節手段２３を、前記熱伝達量変化信号の入力
を受けて、前記熱伝達量の変化方向に対応して、前記熱
伝達量が上昇した場合には、前記入口給水温度を前記標
準給水温度よりも高く、また、前記熱伝達量が低下した
場合には、前記入口給水温度を前記標準給水温度よりも
低く調節するように構成する。このようにして、前記節
炭器出口排ガス温度を一定に維持するのである。Further, as a configuration unique to the present invention, a heat transfer amount change detecting means 20 for detecting a change in heat transfer amount in the heat transfer tube 7 and an inlet water supply temperature at an inlet of the economizer 6 can be set freely. A feedwater temperature setting means 22 and a set temperature adjusting means 23 for adjusting the inlet feedwater temperature set by the feedwater temperature setting means 22 are provided. Exhaust gas temperature detecting means for detecting the change in the heat transfer amount at the outlet of the economizer 6 in the flue 3 to detect the temperature of the economizer outlet exhaust gas of the exhaust gas passing through the economizer 6 21 is disposed, and when the exhaust gas temperature at the economizer outlet deviates from a preset standard outlet temperature range, the heat transfer amount change signal is transmitted to the set temperature adjusting means 23. The change detecting means 20 is constituted. Then, the set temperature adjusting means 23 receives the input of the heat transfer amount change signal and, when the heat transfer amount increases in accordance with the change direction of the heat transfer amount, adjusts the inlet water supply temperature. When the heat transfer amount is higher than the standard water supply temperature and the heat transfer amount is reduced, the inlet water supply temperature is adjusted to be lower than the standard water supply temperature. In this way, the temperature of the exhaust gas at the outlet of the economizer is kept constant.
【００２５】以上のように構成して、例えば、燃焼炉１
で生成する燃焼ガスの保有熱を回収する伝熱管７である
ボイラ伝熱管７Ａ、過熱器伝熱管７Ｂ、節炭器伝熱管７
Ｃの少なくとも何れかに汚れが生じた場合に、その汚れ
に起因する前記伝熱管７における熱伝達量の低下を、煙
道３において、節炭器６の出口部に配置した排ガス温度
検出手段２１により節炭器出口排ガス温度を検出し、熱
伝達量変化検出手段２０で、前記節炭器出口排ガス温度
が予め設定された標準出口温度範囲から上方に逸脱した
場合として検出して熱伝達量低下信号を発信し、この熱
伝達量低下信号を給水温度設定手段２２が受信すれば、
設定温度調節手段２３で供給蒸気圧調節弁１６の設定圧
力を低く補正することで、前記節炭器６の入口給水温度
を、予め設定された標準給水温度よりも低くするのであ
る。こうして、前記入口給水温度を低下させることによ
り、前記伝熱管７内外の対数平均温度差を拡大すること
で、前記伝熱管７における熱伝達係数の低下を補って、
伝熱面の汚れに起因する前記伝熱管７における前記熱伝
達係数の低下に伴う前記ボイラ４における蒸気発生量の
減少を防止できるのである。さらに、ゴミ焼却炉におい
ては、焼却される被処理物の含有塩素分によるボイラ４
のボイラ伝熱管７Ａにおける伝熱面の腐食を防止するた
めに、その伝熱面温度を約３００℃以下に抑えている現
状から、上述のように、前記汚れに伴って前記ボイラ伝
熱管７Ａの伝熱面温度が上昇した場合にボイラ給水温度
を低くすることになるから、上記伝熱面の腐食防止にも
有効である。With the above configuration, for example, the combustion furnace 1
Boiler heat transfer tube 7A, superheater heat transfer tube 7B, and economizer heat transfer tube 7 which are heat transfer tubes 7 for recovering the retained heat of the combustion gas generated in
If at least one of the C is contaminated, the decrease in the amount of heat transfer in the heat transfer tube 7 due to the contamination is detected by the exhaust gas temperature detecting means 21 disposed at the outlet of the economizer 6 in the flue 3. And the heat transfer amount change detecting means 20 detects a case where the temperature of the economizer outlet exhaust gas deviates upward from a preset standard outlet temperature range, and decreases the heat transfer amount. When the feed water temperature setting means 22 receives this heat transfer amount reduction signal,
By correcting the set pressure of the supply steam pressure control valve 16 to be low by the set temperature control means 23, the inlet feed water temperature of the economizer 6 is made lower than a preset standard feed water temperature. In this way, by reducing the inlet water supply temperature, the logarithmic average temperature difference between the inside and outside of the heat transfer tube 7 is expanded, thereby compensating for the decrease in the heat transfer coefficient in the heat transfer tube 7,
It is possible to prevent a decrease in the amount of steam generated in the boiler 4 due to a decrease in the heat transfer coefficient in the heat transfer tube 7 due to contamination of the heat transfer surface. Furthermore, in a refuse incinerator, the boiler 4 is not used due to the chlorine content of the incineration target.
In order to prevent the heat transfer surface of the boiler heat transfer tube 7A from being corroded, the temperature of the heat transfer surface is kept at about 300 ° C. or less. When the temperature of the heat transfer surface rises, the temperature of the boiler feedwater is lowered, which is also effective in preventing corrosion of the heat transfer surface.
【００２６】上記構成のボイラ給水機構１０の制御手順
について説明すると、例えば図２に示すように、排ガス
温度検出手段２１により節炭器出口排ガス温度を検出す
る。熱伝達量変化検出手段２０では、検出結果を標準出
口排ガス温度と比較する。その比較の結果、前記節炭器
出口排ガス温度が前記標準出口排ガス温度の範囲内であ
れば給水温度設定手段２２の設定脱気圧力は変更しな
い。前記節炭器出口排ガス温度が前記標準出口排ガス温
度の範囲内から下方に逸脱しておれば、設定温度調節手
段２３に正の補正値を設定し、給水温度設定手段２２の
設定脱気圧力を高く補正する。また、前記節炭器出口排
ガス温度が前記標準出口排ガス温度の範囲内から上方に
逸脱しておれば、設定温度調節手段２３に負の補正値を
設定し、給水温度設定手段２２の設定脱気圧力を低く補
正する。伝熱管７に汚れが生じた場合の具体例を挙げて
説明すれば、常用時には、前記給水温度設定手段２２に
おける標準給水温度は１６４℃であり、脱気器１３にお
ける脱気室１４の圧力は、これに対応して設定圧力は約
５８８ｍＰa （６atg ）に維持しているのであるが、前
記熱伝達量低下信号を受けると、前記給水温度設定手段
２２における設定温度を１４３℃に変更し、設定温度調
節手段２３では脱気圧力を約２９４ｍＰa （３atg ）に
補正するのである。The control procedure of the boiler water supply mechanism 10 having the above-described structure will be described. For example, as shown in FIG. The heat transfer amount change detecting means 20 compares the detection result with the standard outlet exhaust gas temperature. As a result of the comparison, if the exhaust gas temperature at the economizer outlet is within the range of the standard exhaust gas temperature, the set deaeration pressure of the feedwater temperature setting means 22 is not changed. If the economizer outlet exhaust gas temperature deviates downward from the range of the standard outlet exhaust gas temperature, a positive correction value is set in the set temperature adjusting means 23, and the set deaeration pressure of the feedwater temperature setting means 22 is reduced. Correct higher. Also, if the economizer outlet exhaust gas temperature deviates upward from the range of the standard outlet exhaust gas temperature, a negative correction value is set in the set temperature adjusting means 23 and the set deaeration of the feedwater temperature setting means 22 is set. Compensate for lower pressure. Explaining with a specific example in the case where the heat transfer tube 7 is contaminated, in normal use, the standard water supply temperature in the water supply temperature setting means 22 is 164 ° C., and the pressure of the deaeration chamber 14 in the deaerator 13 is Correspondingly, the set pressure is maintained at about 588 mPa (6 atg). When the heat transfer amount decrease signal is received, the set temperature in the feedwater temperature setting means 22 is changed to 143 ° C. The temperature control means 23 corrects the deaeration pressure to about 294 mPa (3 atg).
【００２７】〔別実施形態〕上記実施の形態において示
さなかった本発明に係るボイラ給水制御方法及びボイラ
給水機構の実施の形態について以下に説明する。[Another Embodiment] An embodiment of a boiler water supply control method and a boiler water supply mechanism according to the present invention not shown in the above embodiment will be described below.
【００２８】〈１〉上記実施の形態に於いては、節炭器
６の出口部に配置した排ガス温度検出手段２１により節
炭器出口排ガス温度を検出し、熱伝達量変化検出手段２
０で、前記節炭器出口排ガス温度が予め設定された標準
出口温度範囲から上方に逸脱した場合として伝熱管７の
汚れを検出する例について説明したが、本発明に係るボ
イラ給水制御方法及びボイラ給水機構は、前記伝熱管７
の汚れに対処するのみならず、炉内温度が低下して、ボ
イラ４における蒸気発生量が低下する場合には、前記炉
内温度の低下に伴って前記節炭器出口排ガス温度が低下
するから、これを前記排ガス温度検出手段２１で検出し
た節炭器出口排ガス温度から熱伝達量変化検出手段２０
でその温度低下を検知して、給水温度設定手段２２によ
り設定温度調節手段２３で供給蒸気圧調節弁１６の設定
圧力を高く補正することで、前記ボイラ４における蒸気
温度を高めて、前記ボイラ４における発生蒸気量の低下
も抑制できるのである。<1> In the above embodiment, the exhaust gas temperature detecting means 21 disposed at the outlet of the economizer 6 detects the exhaust gas temperature at the economizer outlet, and the heat transfer amount change detecting means 2
0, the dirt on the heat transfer tube 7 is detected as the case where the temperature of the exhaust gas from the economizer deviates upward from a preset standard outlet temperature range. However, the boiler feedwater control method and the boiler according to the present invention are described. The water supply mechanism is provided by the heat transfer tube 7.
In addition to dealing with dirt, when the furnace temperature decreases and the amount of steam generated in the boiler 4 decreases, the exhaust gas temperature at the economizer outlet decreases as the furnace temperature decreases. The heat transfer amount change detecting means 20 is calculated from the exhaust gas temperature at the outlet of the economizer detected by the exhaust gas temperature detecting means 21.
Then, the temperature drop is detected, and the feedwater temperature setting means 22 corrects the set pressure of the supply steam pressure control valve 16 by the set temperature control means 23 to increase the steam temperature in the boiler 4, thereby increasing the steam temperature in the boiler 4. Therefore, it is possible to suppress a decrease in the amount of generated steam.
【００２９】〈２〉上記実施の形態に於いては、給水温
度設定手段２２が熱伝達量変化信号を受信すれば、設定
温度調節手段２３で供給蒸気圧調節弁１６の設定圧力を
変化させるように補正して、節炭器６の入口給水温度を
変化させる例について説明したが、前記入口給水温度を
変化させる手段は上記に限るものではなく、他の手段も
採用できる。例えば、脱気器１３の下流側に接続された
給水路１８に補給水又は蒸気を供給して温度調節するよ
うに構成してあっても良い。<2> In the above embodiment, when the feed water temperature setting means 22 receives the heat transfer amount change signal, the set temperature adjusting means 23 changes the set pressure of the supply steam pressure adjusting valve 16. The example in which the inlet feedwater temperature of the economizer 6 is changed has been described, but the means for changing the inlet feedwater temperature is not limited to the above, and other means can be adopted. For example, the temperature may be adjusted by supplying make-up water or steam to the water supply passage 18 connected to the downstream side of the deaerator 13.
【００３０】〈３〉上記実施の形態に於いては、節炭器
６の入口における入口給水温度を設定自在な給水温度設
定手段２２と、前記給水温度設定手段２２において設定
された入口給水温度を調節する設定温度調節手段２３と
を設ける例について説明したが、これら両手段２２，２
３を単一の手段で構成してあってもよく、また、これら
両手段２２，２３の機能を熱伝達量変化検出手段２０に
備えさせてあってもよい。<3> In the above embodiment, the feed water temperature setting means 22 capable of setting the inlet feed water temperature at the inlet of the economizer 6 and the inlet feed water temperature set by the feed water temperature setting means 22 The example in which the set temperature adjusting means 23 for adjusting the temperature is provided has been described.
3 may be constituted by a single means, or the functions of these two means 22, 23 may be provided in the heat transfer amount change detecting means 20.
【００３１】〈４〉上記実施の形態に於いては、熱伝達
量の変化を検出するために、前記煙道３における前記節
炭器６の出口部に、その節炭器６を通過した排ガスの節
炭器出口排ガス温度を検出する排ガス温度検出手段２１
を配置して、前記節炭器出口排ガス温度が予め設定され
た標準出口温度範囲から逸脱した場合に設定温度調節手
段２３に向けて熱伝達量変化信号を発信する例について
説明したが、例えば図３に示すように、前記熱伝達量の
変化を検出するのに、ボイラ４の出口における蒸気流量
から前記ボイラ４における蒸気発生量を検出する発生蒸
気量検出手段２５を設けて、前記発生蒸気量検出手段２
５で検出した蒸気流量が予め設定された標準蒸気発生量
の範囲から逸脱した場合に熱伝達量変化信号を発信する
ように構成して、前記設定温度調節手段２３により、入
口給水温度を予め設定された標準給水温度に対して変化
させるようにボイラ給水機構１０を構成してあってもよ
い。この場合においては、前記発生蒸気量検出手段２５
で検出した蒸気流量が予め設定された標準蒸気発生量の
範囲から逸脱した場合に、熱伝達量変化信号を発信する
ように前記熱伝達量変化検出手段２０を構成して、前記
設定温度調節手段２３により、前記入口給水温度を前記
標準給水温度よりも高く又は低く調節するように構成す
ればよい。前記伝熱管７に汚れが生じた場合について説
明すれば、例えば図４に示すように、前記発生蒸気量検
出手段２５で検出した蒸気流量が予め設定された標準蒸
気発生量の範囲から下方に逸脱した場合に、前記伝熱管
７の汚れを検出するものとし、熱伝達量低下信号を発信
するように前記熱伝達量変化検出手段２０を構成して、
前記設定温度調節手段２３により、前記入口給水温度を
前記標準給水温度よりも低く調節するのである。<4> In the above embodiment, in order to detect a change in the amount of heat transfer, the exhaust gas passing through the economizer 6 is provided at the outlet of the economizer 6 in the flue 3. Temperature detection means 21 for detecting the temperature of the exhaust gas at the outlet of the economizer
The example in which the heat transfer amount change signal is transmitted to the set temperature adjusting means 23 when the temperature of the exhaust gas from the economizer deviates from a preset standard outlet temperature range has been described. As shown in FIG. 3, in order to detect a change in the heat transfer amount, a generated steam amount detecting means 25 for detecting the amount of steam generated in the boiler 4 from the steam flow rate at the outlet of the boiler 4 is provided. Detecting means 2
When the steam flow rate detected in step 5 deviates from a preset range of the standard steam generation amount, a heat transfer amount change signal is transmitted, and the set feed water temperature is set in advance by the set temperature adjusting means 23. The boiler water supply mechanism 10 may be configured to change with respect to the set standard water supply temperature. In this case, the generated steam amount detecting means 25
The heat transfer amount change detecting means 20 is configured to transmit a heat transfer amount change signal when the steam flow rate detected in the step deviates from a predetermined range of the standard steam generation amount, and the set temperature adjusting means 23, the inlet feedwater temperature may be adjusted to be higher or lower than the standard feedwater temperature. The case where the heat transfer tube 7 is contaminated will be described. For example, as shown in FIG. 4, the steam flow rate detected by the generated steam amount detecting means 25 deviates downward from a preset standard steam generation amount range. In this case, it is assumed that the heat transfer tube 7 is contaminated, and the heat transfer amount change detecting means 20 is configured to transmit a heat transfer amount reduction signal.
The inlet temperature is adjusted to be lower than the standard temperature by the set temperature adjusting means 23.
【００３２】〈５〉燃焼炉１がゴミ焼却炉１Ａである場
合に、上記〈４〉における標準蒸気発生量を定めるの
に、前記ゴミ焼却炉１Ａ内に投入するゴミのゴミ質によ
り炉内で燃焼するゴミの低位発熱量が異なることに対応
するために、前記標準蒸気発生量を前記ゴミ質により異
ならせて設定し、投入されるゴミのゴミ質に応じて、そ
のゴミ質に対応する標準蒸気発生量を用いて、発生蒸気
量検出手段２５で検出した蒸気流量を、選択した標準蒸
気発生量と比較するようにしてもよい。このように構成
すれば、前記蒸気流量により前記伝熱管７の汚れを検出
する場合に、ゴミ質の変化に伴う蒸気流量の変化を誤っ
て前記伝熱管７の汚れと判断することを防止できなが
ら、同時に前記ゴミ質の変化による蒸気流量の変化を抑
制できるようになる。<5> In the case where the combustion furnace 1 is the refuse incinerator 1A, the standard steam generation amount in the above <4> is determined based on the refuse quality of the refuse introduced into the refuse incinerator 1A. In order to cope with the difference in the lower heating value of the garbage to be burned, the standard steam generation amount is set to be different depending on the garbage quality, and the standard corresponding to the garbage quality of the garbage input is set. Using the generated steam amount, the steam flow rate detected by the generated steam amount detection means 25 may be compared with the selected standard steam generation amount. With this configuration, when detecting the contamination of the heat transfer tube 7 based on the steam flow rate, it is possible to prevent a change in the steam flow rate caused by a change in the dust quality from being erroneously determined as the contamination of the heat transfer tube 7. At the same time, a change in the steam flow rate due to the change in the dust quality can be suppressed.
【００３３】〈６〉上記実施の形態に於いては、本発明
に係るボイラ給水制御方法及びボイラ給水機構をゴミ焼
却炉１Ａに適用した例について説明したが、その適用対
象は上記に限らず、ボイラ４は、通常のボイラであって
もよく、他の燃焼設備に敷設された廃熱ボイラであって
もよい。<6> In the above embodiment, an example in which the boiler water supply control method and the boiler water supply mechanism according to the present invention are applied to the refuse incinerator 1A has been described. The boiler 4 may be a normal boiler, or may be a waste heat boiler installed in another combustion facility.
【００３４】[0034]
【発明の効果】以上説明したように、本発明によって、
伝熱管の伝熱面に汚れが生じても蒸気発生量の変動を抑
制でき、また、前記伝熱面の温度を容易に調節できる手
段を提供できた。As described above, according to the present invention,
Even if the heat transfer surface of the heat transfer tube becomes contaminated, it is possible to suppress the variation in the amount of generated steam and to provide a means for easily adjusting the temperature of the heat transfer surface.
【００３５】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.
【図１】本発明に係るゴミ焼却炉の一例を示す構成説明
図FIG. 1 is a configuration explanatory view showing an example of a refuse incinerator according to the present invention.
【図２】本発明に係るボイラ給水制御の手順の一例を示
す流れ図FIG. 2 is a flowchart showing an example of a boiler water supply control procedure according to the present invention.
【図３】本発明に係るゴミ焼却炉の他の例を示す構成説
明図FIG. 3 is a configuration explanatory view showing another example of the refuse incinerator according to the present invention.
【図４】本発明に係るボイラ給水制御の他の例を示す流
れ図FIG. 4 is a flowchart showing another example of boiler water supply control according to the present invention.
【図５】従来のゴミ焼却炉の一例を示す構成説明図FIG. 5 is a configuration explanatory view showing an example of a conventional refuse incinerator.
１ 燃焼炉 ３ 煙道 ４ ボイラ ６ 節炭器 ７ 伝熱管 １０ ボイラ給水機構 ２０ 熱伝達量変化検出手段 ２１ 排ガス温度検出手段 ２２ 給水温度設定手段 ２３ 設定温度調節手段 ２５ 発生蒸気量検出手段 DESCRIPTION OF SYMBOLS 1 Combustion furnace 3 Flue 4 Boiler 6 Energy saving device 7 Heat transfer tube 10 Boiler water supply mechanism 20 Heat transfer amount change detecting means 21 Exhaust gas temperature detecting means 22 Feedwater temperature setting means 23 Set temperature adjusting means 25 Generated steam amount detecting means
Claims (6)
熱を回収する伝熱管（７）を、前記燃焼ガスを導く煙道
（３）に配置してあるボイラ（４）に、ボイラ給水を、
前記煙道（３）の下流側に配置した前記伝熱管（７）で
構成される節炭器（６）を経て供給するボイラ給水機構
（１０）におけるボイラ給水制御方法であって、 前記伝熱管（７）における熱伝達量の変化を検出して、
前記熱伝達量が変化したと判断した場合に、その熱伝達
量の変化に応じて、前記節炭器（６）の入口給水温度を
変化させるボイラ給水制御方法。1. A boiler (4) arranged in a flue (3) for introducing said combustion gas into a boiler (4), wherein a heat transfer tube (7) for recovering retained heat of the combustion gas generated in the combustion furnace (1) is provided. Water supply,
A method for controlling boiler water supply in a boiler water supply mechanism (10) that supplies a heat through a economizer (6) including the heat transfer tubes (7) disposed downstream of the flue (3), wherein the heat transfer tubes Detecting the change in the heat transfer amount in (7),
A boiler feedwater control method for changing the inlet feedwater temperature of the economizer (6) according to the change in the heat transfer amount when it is determined that the heat transfer amount has changed.
煙道（３）で、前記節炭器（６）の出口における節炭器
出口排ガス温度を検出し、前記節炭器出口排ガス温度が
予め設定された標準出口温度範囲から上方に逸脱した場
合に、前記節炭器（６）の入口給水温度を、予め設定さ
れた標準給水温度よりも低くする請求項１記載のボイラ
給水制御方法。2. A method for detecting a change in the amount of heat transfer, the method comprising: detecting, in the flue (3), an exhaust gas temperature at an outlet of the economizer (6); The boiler feedwater control according to claim 1, wherein when the temperature deviates upward from a preset standard outlet temperature range, the inlet feedwater temperature of the economizer (6) is lower than the preset standard feedwater temperature. Method.
ボイラ（４）における蒸気発生量を検出し、前記蒸気発
生量が予め設定された標準蒸気発生量の範囲から下方に
逸脱した場合に、前記節炭器（６）の入口給水温度を、
予め設定された標準給水温度よりも低くする請求項１記
載のボイラ給水制御方法。3. A method for detecting a change in the amount of heat transfer, wherein the amount of generated steam in the boiler (4) is detected, and the amount of generated steam deviates downward from a predetermined range of standard steam generation. And the inlet water temperature of the economizer (6)
2. The boiler feedwater control method according to claim 1, wherein the temperature is lower than a preset standard feedwater temperature.
煙道（３）に伝熱管（７）を配置して、前記燃焼ガスの
保有熱を回収するボイラ（４）に、ボイラ給水を、前記
伝熱管（７）のうちで前記煙道（３）の下流側に配置し
た伝熱管（７）で構成される節炭器（６）を経て供給す
る給水路（１８）を備えるボイラ給水機構であって、 前記伝熱管（７）における熱伝達量の変化を検出する熱
伝達量変化検出手段（２０）と、前記節炭器（６）の入
口における入口給水温度を設定自在な給水温度設定手段
（２２）と、前記給水温度設定手段（２２）において設
定された入口給水温度を調節する設定温度調節手段（２
３）とを設けて、前記設定温度調節手段（２３）を、前
記熱伝達量変化検出手段（２０）からの熱伝達量変化信
号の入力を受けて、前記熱伝達量の変化方向に応じて、
前記入口給水温度を予め設定された標準給水温度よりも
高く又は低く調節するように構成してあるボイラ給水機
構。4. A heat transfer pipe (7) is arranged in a flue (3) for guiding combustion gas generated in a combustion furnace (1), and a boiler feed water is supplied to a boiler (4) for recovering heat retained in the combustion gas. Boiler provided with a water supply channel (18) for supplying the heat-transfer pipe through a heat-saving tube (6) composed of a heat-transfer tube (7) disposed downstream of the flue (3) in the heat-transfer tube (7). A water supply mechanism, comprising: a heat transfer amount change detecting means (20) for detecting a change in heat transfer amount in the heat transfer tube (7); and a water supply capable of setting an inlet water supply temperature at an inlet of the economizer (6). A temperature setting means (22); and a set temperature adjusting means (2) for adjusting the inlet water temperature set by the water temperature setting means (22).
3), the set temperature adjusting means (23) receives an input of the heat transfer amount change signal from the heat transfer amount change detecting means (20), and responds to the change direction of the heat transfer amount. ,
A boiler water supply mechanism configured to adjust the inlet water temperature higher or lower than a preset standard water temperature.
（６）の出口部に、節炭器出口排ガス温度を検出する排
ガス温度検出手段（２１）を配置して、 前記熱伝達量変化検出手段（２０）を、前記節炭器出口
排ガス温度が予め設定された標準出口温度範囲から上方
に逸脱した場合に熱伝達量低下信号を発信するように構
成して、前記設定温度調節手段（２３）により、前記入
口給水温度を予め設定された標準給水温度よりも低く調
節するように構成してある請求項４記載のボイラ給水機
構。5. An exhaust gas temperature detecting means (21) for detecting an exhaust gas temperature at an outlet of the economizer at the outlet of the economizer (6) in the flue (3), The detecting means (20) is configured to transmit a heat transfer amount decrease signal when the temperature of the exhaust gas from the economizer deviates upward from a preset standard outlet temperature range. The boiler water supply mechanism according to claim 4, wherein the inlet water supply temperature is adjusted to be lower than a preset standard water supply temperature according to (23).
量を検出する発生蒸気量検出手段（２５）を設けて、 前記熱伝達量変化検出手段（２０）を、前記発生蒸気量
検出手段（２５）で検出した蒸気流量が予め設定された
標準蒸気発生量の範囲から下方に逸脱した場合に熱伝達
量低下信号を発信するように構成して、前記設定温度調
節手段（２３）により、前記入口給水温度を予め設定さ
れた標準給水温度よりも低く調節するように構成してあ
る請求項４記載のボイラ給水機構。6. A generated steam amount detecting means (25) for detecting a steam flow rate at an outlet of the boiler (4), wherein the heat transfer amount change detecting means (20) is provided with the generated steam amount detecting means (25). ) Is configured to transmit a heat transfer amount reduction signal when the steam flow rate detected in step (d) deviates from a predetermined range of the standard steam generation amount. The boiler water supply mechanism according to claim 4, wherein the water supply temperature is adjusted to be lower than a preset standard water supply temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000024896A JP2001215001A (en) | 2000-02-02 | 2000-02-02 | Boiler feed water controlling method and boiler feed water mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000024896A JP2001215001A (en) | 2000-02-02 | 2000-02-02 | Boiler feed water controlling method and boiler feed water mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001215001A true JP2001215001A (en) | 2001-08-10 |
Family
ID=18550828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000024896A Pending JP2001215001A (en) | 2000-02-02 | 2000-02-02 | Boiler feed water controlling method and boiler feed water mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001215001A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923349A (en) * | 2021-02-26 | 2021-06-08 | 华能洛阳热电有限责任公司 | Dynamic dirt monitoring method and system for low-temperature economizer of coal-fired boiler |
-
2000
- 2000-02-02 JP JP2000024896A patent/JP2001215001A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923349A (en) * | 2021-02-26 | 2021-06-08 | 华能洛阳热电有限责任公司 | Dynamic dirt monitoring method and system for low-temperature economizer of coal-fired boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5630084B2 (en) | Boiler water supply system | |
| JP2008032367A (en) | Control method for once-through waste heat recovery boiler | |
| JP2014105612A (en) | Waste heat recovery facility, waste heat recovery method and waste treatment furnace | |
| JP2007248018A (en) | Control system for supply water preheater of reheat boiler | |
| JP2001215001A (en) | Boiler feed water controlling method and boiler feed water mechanism | |
| JP2007187352A (en) | Starting method of boiler | |
| JP2012189297A (en) | Boiler equipment and control method for outlet gas temperature therefor | |
| JP2021021554A (en) | Boiler control device, boiler system, power generation plant, and boiler control method | |
| JP4117733B2 (en) | Method and apparatus for boiler reheat steam temperature control | |
| JP2009156553A (en) | Reheat steam temperature control method | |
| JP5766527B2 (en) | Method and apparatus for controlling once-through boiler | |
| JPH11264535A (en) | Method and device for controlling air temperature of steam air heater | |
| JP2008292119A (en) | Power generator | |
| JP2008002739A (en) | Concentration blow control method for boiler | |
| JP2005201506A (en) | Combustion control method for boiler | |
| JPH0783005A (en) | Compound refuse power generation plant | |
| JP2002106804A (en) | Feedwater flow-rate controller of variable once- through boiler | |
| JP2002005402A (en) | Waste heat recovery system for refuse disposal plant | |
| JP2000161606A (en) | Steaming prevention control method nd apparatus for coal saving apparatus | |
| JP2971597B2 (en) | Waste heat recovery boiler | |
| JP2002081613A (en) | Condensate recovering mechanism | |
| JP6707058B2 (en) | Waste heat boiler, waste heat recovery system, and waste heat recovery method | |
| JPS62162808A (en) | Fuel-economizer steaming preventive device for thermal powerboiler system | |
| JP2005241043A (en) | Heat utilization system | |
| JP2002267154A (en) | Boiler device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040430 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20061002 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20061108 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20070306 |