JP2002191935A - Method for treating flue gas of boiler using oil of high sulfur concentration - Google Patents
Method for treating flue gas of boiler using oil of high sulfur concentrationInfo
- Publication number
- JP2002191935A JP2002191935A JP2000394756A JP2000394756A JP2002191935A JP 2002191935 A JP2002191935 A JP 2002191935A JP 2000394756 A JP2000394756 A JP 2000394756A JP 2000394756 A JP2000394756 A JP 2000394756A JP 2002191935 A JP2002191935 A JP 2002191935A
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- Prior art keywords
- exhaust gas
- ammonia
- oil
- injected
- concentration
- 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.)
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- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
- Electrostatic Separation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高イオウ油焚きボ
イラの排煙処理方法に係わり、特に、イオウ分の含有率
の高い高イオウ燃料（以下「高Ｓ油燃料」と称す）を燃
料とする高イオウ油焚きボイラ（以下「高Ｓ油焚きボイ
ラ」と称す）の排煙処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating flue gas of a high-sulfur oil-fired boiler, and more particularly to a high-sulfur fuel having a high sulfur content (hereinafter referred to as "high-S oil fuel"). The present invention relates to a method for treating smoke from a high-sulfur oil-fired boiler (hereinafter referred to as a “high-S oil-fired boiler”).
【０００２】[0002]
【従来の技術】従来、油炊きボイラ用の電気集塵器で
は、取り扱う排ガス及び排ガス中のダストに含有する水
分や三酸化イオウ（ＳＯ3 ）のために排ガスの露点が高
く、機器腐食や灰詰まりを起こしたり、酸性の強いスマ
ットを生成するという問題があった。さらに、排ガス中
のダストが非常に細かく、電気固有抵抗率が低いため、
電気集塵器の電極板に捕集したダストが再飛散し易いと
いう問題もあった。2. Description of the Related Art Conventionally, in an electric dust collector for an oil-fired boiler, the dew point of the exhaust gas is high due to the moisture and sulfur trioxide (SO 3 ) contained in the exhaust gas to be handled and the dust in the exhaust gas, and equipment corrosion and ash have occurred. There have been problems of clogging and formation of a strongly acidic smut. Furthermore, the dust in the exhaust gas is very fine and the electrical resistivity is low,
There is also a problem that the dust collected on the electrode plate of the electrostatic precipitator is easily scattered again.
【０００３】そこで、電気集塵器の入口側にアンモニア
ガスを注入してＳＯ3 を中和することによって上記問題
点の解決を図ってきた。前記アンモニアの注入量は、ボ
イラでのＳＯ3 の生成量に応じて行われることが好まし
いが、ＳＯ3 の生成量を求めるのに必要な排ガス中のＳ
Ｏ3 濃度は、連続して測定することができない。そこ
で、アンモニア注入量は、手動又は試運転時等の排ガス
中のＳＯ3 濃度の測定結果に基づき、燃料消費量に比例
した比例注入制御を行なっていた。また、ＳＯ3濃度の
変化に対しては、燃料に含まれるイオウ分の大小によっ
て注入比率を設定変更することによって対応していた。Therefore, the above problem has been solved by injecting ammonia gas into the inlet side of the electrostatic precipitator to neutralize SO 3 . The injection amount of ammonia is preferably determined according to the amount of SO 3 generated in the boiler. However, the amount of S 3 in the exhaust gas required to determine the amount of SO 3 generated
O 3 concentration cannot be measured continuously. Therefore, the injection amount of ammonia is controlled proportionally to the fuel consumption based on the measurement result of the SO 3 concentration in the exhaust gas during manual operation or during test operation. Also, the change in the SO 3 concentration has been dealt with by changing the setting of the injection ratio depending on the amount of sulfur contained in the fuel.
【０００４】ところで、最近のボイラ設備では、運転コ
ストの低減のために高Ｓ油燃料、例えばオイルコークス
や残渣油と呼ばれる超重質油（燃料中のイオウ分が通常
３％程度以上）を使用することが多くなってきている。In recent boiler facilities, high S oil fuels, for example, ultra-heavy oils such as oil coke and residual oil (sulfur content in the fuel is usually about 3% or more) are used to reduce operating costs. Things are increasing.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、高Ｓ油
焚きボイラからの排ガスの場合には、排ガス中のＳＯ3
発生濃度の変化は、ボイラ負荷（ボイラ出力）とは必ず
しも一致せず不安定になり易い。この結果、電気集塵器
に取り込まれる排ガスに従来の制御方法でアンモニアガ
スを注入すると、注入量が過不足するという問題が発生
する。例えば、ＳＯ3 濃度が高くなった場合には、アン
モニア注入量が不足し、未反応のＳＯ3 によって電気集
塵器内に酸性イオウが発生し、電気集塵器内での機器腐
食や灰詰まりが生じやすいという欠点がある。However, in the case of exhaust gas from a high-S oil-fired boiler, SO 3 in the exhaust gas
The change in the generated concentration does not always coincide with the boiler load (boiler output) and tends to be unstable. As a result, when ammonia gas is injected into the exhaust gas taken into the electric precipitator by the conventional control method, a problem arises in that the injection amount is excessive or insufficient. For example, when the SO 3 concentration becomes high, the amount of injected ammonia becomes insufficient, and unreacted SO 3 generates acid sulfur in the electrostatic precipitator, causing equipment corrosion and ash clogging in the electric precipitator. There is a drawback that is easy to occur.
【０００６】この結果、電気集塵器を停止せざるを得な
いような問題が生じる。これを防ぐには、アンモニアを
予め過剰に注入すればよいが、何の目安もなくアンモニ
アの注入量を増加すれば、アンモニアの注入量が過剰と
なり、経済的に不利益となるだけでなく、電気集塵器か
ら未反応のアンモニアが多量に排出されて新たな公害原
因となる。As a result, there arises a problem that the electric precipitator must be stopped. In order to prevent this, it is only necessary to inject ammonia excessively in advance, but if the injection amount of ammonia is increased without any guide, the injection amount of ammonia becomes excessive, not only disadvantageous economically, A large amount of unreacted ammonia is discharged from the electrostatic precipitator, causing new pollution.
【０００７】本発明はこのような事情に鑑みて成された
もので、排ガスへ適切な量のアンモニアを注入すること
のできる高イオウ油焚きボイラの排煙処理方法を提供す
ることを目的とする。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for treating flue gas of a high-sulfur oil-fired boiler capable of injecting an appropriate amount of ammonia into exhaust gas. .
【０００８】[0008]
【課題を解決するための手段】本発明の請求項１は前記
目的を達成するために、イオウ分の高い高イオウ油を燃
料とする高イオウ油焚きボイラから排出された排ガスに
アンモニアを注入してから電気集塵器に送気して前記排
ガス中のダストを除去する高イオウ油焚きボイラの排煙
処理方法において、前記アンモニアが注入される排ガス
中の燃焼酸素濃度の変化に応じて該アンモニアの注入量
を調整することを特徴とする。According to a first aspect of the present invention, in order to achieve the above object, ammonia is injected into exhaust gas discharged from a high sulfur oil-fired boiler using high sulfur oil having a high sulfur content as fuel. A high-sulfur oil-fired boiler that removes dust from the exhaust gas by sending air to an electrostatic precipitator, wherein the ammonia is injected according to a change in the concentration of combustion oxygen in the exhaust gas into which the ammonia is injected. It is characterized in that the injection amount of is adjusted.
【０００９】本発明は、アンモニアが注入される排ガス
中の燃焼酸素濃度の変化が、排ガス中のＳＯ3 濃度に影
響することに着目して成されたもので、排ガス中の燃焼
酸素濃度の変化に応じてアンモニアの注入量を調整する
ようにしたので、排ガスへのアンモニア注入量が過不足
することがない。これにより、電気集塵器内での機器腐
食や灰詰まりが生じにくくできる。The present invention has been made by paying attention to the fact that the change in the concentration of combustion oxygen in the exhaust gas into which ammonia is injected affects the concentration of SO 3 in the exhaust gas. The amount of ammonia injected is adjusted in accordance with the condition (1), so that the amount of ammonia injected into the exhaust gas does not become excessive or insufficient. As a result, corrosion of equipment and ash clogging in the electric precipitator can be suppressed.
【００１０】本発明の請求項２は、請求項１における排
ガス中の燃焼酸素濃度の変化に応じてアンモニアの注入
量を調整する仕方を、排ガス中の燃焼酸素濃度の変化に
対応した注入比率を求め、該注入比率を前記高イオウ油
燃料の燃料消費量に比例した比例アンモニア注入量に乗
算するようにしたものである。A second aspect of the present invention relates to a method for adjusting the injection amount of ammonia according to the change in the concentration of combustion oxygen in the exhaust gas according to the first aspect. Then, the injection ratio is multiplied by a proportional ammonia injection amount proportional to the fuel consumption of the high sulfur oil fuel.
【００１１】また、本発明の請求項３は、請求項２にお
いて、注入比率の設定を、燃焼酸素濃度が定格値のとき
を１としたときの該定格値に対する比率で行うようにし
たものである。ここで、燃焼酸素濃度が定格値とは、ボ
イラが定常運転での燃焼酸素濃度の値をいう。According to a third aspect of the present invention, in the second aspect, the injection ratio is set based on a ratio of the combustion oxygen concentration to the rated value when the rated value is set to 1. is there. Here, the rated value of the combustion oxygen concentration refers to the value of the combustion oxygen concentration when the boiler is in a steady operation.
【００１２】[0012]
【発明の実施の形態】以下添付図面に従って、本発明に
係る高イオウ油焚きボイラの排煙処理方法の好ましい実
施の形態について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method for treating smoke from a high-sulfur oil-fired boiler according to the present invention will be described below with reference to the accompanying drawings.
【００１３】図１は、本発明の高イオウ油焚きボイラの
排煙処理方法を適用する排煙処理システム１０の概略構
造を示す構成図である。FIG. 1 is a block diagram showing a schematic structure of a flue gas treatment system 10 to which the method for treating flue gas of a high sulfur oil fired boiler of the present invention is applied.
【００１４】同図に示すように、排煙処理システム１０
は主として、高Ｓ油焚きボイラ１２、空気予熱器１４、
電気集塵器１６、煙突１８から構成され、高Ｓ油焚きボ
イラ１２から排出された排ガスが、空気予熱器１４を経
た後、電気集塵器１６で脱塵され、煙突１８から大気に
放出されるようになっている。As shown in FIG.
Are mainly high S oil fired boiler 12, air preheater 14,
Exhaust gas that is composed of an electric dust collector 16 and a chimney 18 and is discharged from the high-S oil-fired boiler 12 passes through an air preheater 14, is then dedusted by the electric dust collector 16, and is discharged from the chimney 18 to the atmosphere. It has become so.
【００１５】電気集塵器１６の入口側には、アンモニア
の注入手段２２が設けられ、この注入手段２２によって
ガス状のアンモニアが排ガス中に注入される。これによ
り、排ガスに含まれるＳＯ3 は、アンモニアによって中
和されて硫酸アンモニウムを生成し、この硫酸アンモニ
ウムが電気集塵器１６によって捕集される。At the inlet side of the electrostatic precipitator 16, an ammonia injection means 22 is provided, and gaseous ammonia is injected into exhaust gas by the injection means 22. Thus, SO 3 contained in the exhaust gas is neutralized by ammonia to produce ammonium sulfate, and the ammonium sulfate is collected by the electric dust collector 16.
【００１６】注入手段２２から排ガスに注入するアンモ
ニアの注入量は制御装置２６によって制御される。制御
装置２６には、高Ｓ油焚きボイラ１２からの信号とし
て、高Ｓ油燃料消費量信号１００、燃焼酸素濃度信号１
０１がそれぞれ入力される。The amount of ammonia injected into the exhaust gas from the injection means 22 is controlled by a control device 26. The controller 26 includes a high-S oil fuel consumption signal 100 and a combustion oxygen concentration signal 1 as signals from the high-S oil-fired boiler 12.
01 is input.
【００１７】ここで、燃焼酸素濃度とは、高Ｓ油焚きボ
イラ１２から排出される排ガス中の酸素濃度であって、
アンモニアが注入される前の酸素濃度をいう。Here, the combustion oxygen concentration is the oxygen concentration in the exhaust gas discharged from the high-S oil-fired boiler 12, and
It refers to the oxygen concentration before ammonia is injected.
【００１８】そして、制御装置２６は、これらの入力さ
れた信号１００、１０１からの情報に基づいて演算され
たアンモニア注入量を注入量指令信号３６として注入手
段２２に出力する。The control device 26 outputs the ammonia injection amount calculated based on the information from the input signals 100 and 101 to the injection means 22 as an injection amount command signal 36.
【００１９】ところで、発明者は、高Ｓ油焚きボイラ１
２の負荷上昇時又は下降時にＳＯ3濃度の変化が特に大
きいことに着目し、その原因を検討したところ、負荷変
化時には排ガス中の燃焼酸素濃度の変化が大きく、この
燃焼酸素濃度の変化が排ガス中のＳＯ3 濃度の変化に大
きく影響しているという知見を得た。Incidentally, the inventor of the present invention has proposed a high-S oil-fired boiler 1.
Attention was paid to the fact that the change in SO 3 concentration was particularly large when the load was increased or decreased, and the cause was examined. When the load was changed, the change in the combustion oxygen concentration in the exhaust gas was large. It has been found that the change greatly affects the change in the SO 3 concentration.
【００２０】本発明は、上記知見に基づいて成されたも
ので、イオウ分の高い高イオウ油を燃料とする高イオウ
油焚きボイラから排出された排ガスにアンモニアを注入
してから電気集塵器１６に送気して排ガス中のダストを
除去する高イオウ油焚きボイラの排煙処理方法におい
て、アンモニアが注入される排ガス中の燃焼酸素濃度の
変化に応じて該アンモニアの注入量を調整するようにし
たものである。The present invention has been made on the basis of the above findings, and is characterized in that ammonia is injected into exhaust gas discharged from a high-sulfur oil-fired boiler using high-sulfur oil having a high sulfur content as a fuel, and then the electric precipitator is used. In a high-sulfur oil-fired boiler flue gas treatment method for removing dust in exhaust gas by sending air to the exhaust gas, the amount of ammonia to be injected is adjusted according to a change in the concentration of combustion oxygen in the exhaust gas into which ammonia is injected. It was made.
【００２１】図２は、本発明を行うための制御装置２６
の制御系統図である。FIG. 2 shows a control unit 26 for carrying out the present invention.
FIG.
【００２２】制御装置２６には、高Ｓ油焚きボイラ１２
からの燃料消費量信号１００による燃料消費量に対して
どの程度のアンモニア注入量を排ガス中に注入すればよ
いかの演算式ＦＸ１が設けられている。即ち、演算式Ｆ
Ｘ１によって排ガス中のＳＯ 3 を中和するのに最低限必
要な基本のアンモニア注入量が求められ、求められた基
本アンモニア注入量が演算器３７に出力される。The control device 26 includes a high-S oil-fired boiler 12
The fuel consumption by the fuel consumption signal 100 from
What amount of ammonia should be injected into exhaust gas
An arithmetic expression FX1 is provided. That is, the arithmetic expression F
SO1 in exhaust gas by X1 Three Minimum to neutralize
The required basic ammonia injection amount is determined, and the determined base
The main ammonia injection amount is output to the calculator 37.
【００２３】図３は、ＦＸ１演算式を図で表したもの
で、高Ｓ油燃料における燃料消費量に対する基本アンモ
ニア注入量を、ＦＸ１の特性に基づいた比例注入制御を
示したものである。比例注入制御は、燃料消費量が一定
以上、即ち排ガス中のＳＯ3 濃度が高Ｓ油焚きボイラ１
２の負荷（ボイラ出力）に比例し易い安定状態での注入
制御で、燃料消費量に比例した注入制御を行う。FIG. 3 is a diagram showing the FX1 arithmetic expression, and shows the proportional injection control of the basic ammonia injection amount with respect to the fuel consumption of the high S oil fuel based on the characteristics of FX1. In the proportional injection control, the fuel consumption is equal to or more than a certain value, that is, the SO 3 concentration in the exhaust gas is high S oil-fired boiler 1
In the injection control in the stable state, which is easily proportional to the load (boiler output), the injection control is performed in proportion to the fuel consumption.
【００２４】一般にアンモニアとＳＯ3 との反応は、Ｓ
Ｏ3 ＋２ＮＨ3 ＋Ｈ2 Ｏ→（ＮＨ4）2 ＳＯ4 で表され
る。従って、排ガス中のＳＯ3 を中和するために最低限
必要な基本アンモニア注入量は、次式（１）で求めら
れ、図３のＦＸ１特性線は、この（１）式に基づいて構
成したものである。In general, the reaction between ammonia and SO 3 is S
O 3 + 2NH 3 + H 2 O → (NH 4 ) 2 SO 4 Accordingly, the basic ammonia injection amount necessary for neutralizing SO 3 in the exhaust gas is obtained by the following equation (1), and the FX1 characteristic line of FIG. 3 is configured based on the equation (1). Things.
【００２５】[0025]
【数１】 また、制御装置２６には、図２に示すように、高Ｓ油焚
きボイラ１２からの燃焼酸素濃度信号１０１による燃焼
酸素濃度の変化に応じて基本アンモニア注入量をどの程
度調整すればよいかの演算式ＦＸ２が設けられている。
即ち、演算式ＦＸ２によって、排ガス中の燃焼酸素濃度
の変化に対応した注入比率が求められて演算器３７に出
力される。そして、演算器３７では、演算式ＦＸ１から
求められた基本アンモニア注入量に、演算式ＦＸ２から
求められた注入比率が乗算演算されて求められた乗算ア
ンモニア注入量がコントローラ４４に出力される。コン
トローラ４４では、この乗算アンモニア注入量を排ガス
に注入する注入量指令信号３６としてポジショナ４６を
介して注入弁３１に出力する。また、注入管３３を流れ
るアンモニア流量は、検出器３２で検出されてカスケー
ド制御信号３５として制御装置２６のコントローラ４４
に出力される。(Equation 1) Further, as shown in FIG. 2, the control device 26 determines how much the basic ammonia injection amount should be adjusted according to the change in the combustion oxygen concentration based on the combustion oxygen concentration signal 101 from the high-S oil-fired boiler 12. An arithmetic expression FX2 is provided.
That is, the injection ratio corresponding to the change in the concentration of combustion oxygen in the exhaust gas is obtained by the arithmetic expression FX2 and output to the arithmetic unit 37. The calculator 37 multiplies the basic ammonia injection amount obtained from the operation expression FX1 by the injection ratio obtained from the operation expression FX2, and outputs the multiplied ammonia injection amount obtained to the controller 44. The controller 44 outputs the multiplied ammonia injection amount to the injection valve 31 via the positioner 46 as an injection amount command signal 36 for injecting into the exhaust gas. In addition, the flow rate of ammonia flowing through the injection pipe 33 is detected by the detector 32 and is used as a cascade control signal 35 by the controller 44 of the control device 26.
Is output to
【００２６】図４は、ＦＸ２演算式の好ましい一例を図
で示したもので、排ガス中の燃焼酸素濃度の変化に対す
る注入比率を、燃焼酸素濃度が定格値（ＯT ）の場合を
１としたときに該定格値に対する比率として設定したも
のである。例えば、排ガス中の燃焼酸素濃度が定格値の
場合には注入比率は１となり、排ガスに注入する乗算ア
ンモニア注入量は基本アンモニア注入量に１を乗算した
注入量となる。また、排ガス中の燃焼酸素濃度が定格値
の２倍の場合には注入比率は２となり、排ガスに注入す
る乗算アンモニア注入量は基本アンモニア注入量に２を
乗算した注入量となる。[0026] FIG. 4 shows in figure preferred example of FX2 arithmetic expression, an injection ratio of change in the combustion oxygen concentration in the exhaust gas, the combustion oxygen concentration of 1 in the case of rated value (O T) It is sometimes set as a ratio to the rated value. For example, when the concentration of combustion oxygen in the exhaust gas is the rated value, the injection ratio is 1, and the multiplied ammonia injection amount to be injected into the exhaust gas is the injection amount obtained by multiplying the basic ammonia injection amount by 1. When the concentration of combustion oxygen in the exhaust gas is twice the rated value, the injection ratio is 2, and the multiplied ammonia injection amount to be injected into the exhaust gas is the injection amount obtained by multiplying the basic ammonia injection amount by 2.
【００２７】このように、本発明では、排ガス中の燃焼
酸素濃度の変化に対応した注入比率を求め、該注入比率
を燃料消費量に比例した基本アンモニア注入量に乗算し
た値である乗算アンモニア注入量を排ガスに注入するよ
うにしたので、高Ｓ油燃料を使用した油焚きボイラ１２
からの排ガスの場合にも排ガスへのアンモニア注入量が
不足することがない。これにより、電気集塵器１６内で
の機器腐食や灰詰まりが生じにくくできる。As described above, according to the present invention, the injection ratio corresponding to the change in the concentration of combustion oxygen in the exhaust gas is obtained, and the injection ratio is multiplied by the basic ammonia injection amount proportional to the fuel consumption. Since the amount was injected into the exhaust gas, the oil-fired boiler 12 using high S oil fuel was used.
Also in the case of exhaust gas from, there is no shortage of the amount of ammonia injected into the exhaust gas. As a result, corrosion of equipment and ash clogging in the electrostatic precipitator 16 can be suppressed.
【００２８】[0028]
【発明の効果】以上説明したように、本発明の高イオウ
油焚きボイラの排煙処理方法によれば、高イオウ油を燃
料とする排ガスの場合にも、適切な量のアンモニアを注
入することができる。特に、高Ｓ油焚きボイラの負荷変
化時、特に高Ｓ油焚きボイラの燃焼酸素変化時における
排ガスへのアンモニア注入量を適切に制御できる。これ
により、電気集塵器内での機器腐食や灰詰まりを生じに
くくできる。As described above, according to the method for treating flue gas of a high-sulfur oil-fired boiler of the present invention, an appropriate amount of ammonia is injected even in the case of exhaust gas using high-sulfur oil as fuel. Can be. In particular, it is possible to appropriately control the amount of ammonia injected into the exhaust gas when the load of the high-S oil-fired boiler changes, especially when the combustion oxygen of the high-S oil-fired boiler changes. As a result, it is possible to reduce the possibility of device corrosion and ash clogging in the electric precipitator.
【図１】本発明の高イオウ油焚きボイラの排煙処理方法
を適用する排煙処理システムの構成図FIG. 1 is a configuration diagram of a flue gas treatment system to which a method for treating flue gas of a high sulfur oil fired boiler of the present invention is applied.
【図２】制御装置の制御系統を説明する説明図FIG. 2 is an explanatory diagram illustrating a control system of a control device.
【図３】アンモニア注入量の比例制御を説明する説明図FIG. 3 is an explanatory diagram for explaining proportional control of an ammonia injection amount;
【図４】燃焼酸素濃度と注入比率との関係を説明する説
明図FIG. 4 is an explanatory diagram illustrating a relationship between a combustion oxygen concentration and an injection ratio.
１０…排煙処理システム、１２…高Ｓ油焚きボイラ、１
４…空気予熱器、１６…電気集塵器、１８…煙突、２２
…注入手段、２６…制御装置、３１…注入弁、３２…検
出器、３３…注入管、３５…カスケード制御信号、３６
…注入量指令信号、３７…演算器、４４…コントロー
ラ、１００…高Ｓ油燃料消費量信号、１０１…燃焼酸素
濃度信号10: flue gas treatment system, 12: high S oil-fired boiler, 1
4 ... air preheater, 16 ... electric precipitator, 18 ... chimney, 22
... injection means, 26 ... control device, 31 ... injection valve, 32 ... detector, 33 ... injection pipe, 35 ... cascade control signal, 36
... Injection amount command signal, 37 ... Calculator, 44 ... Controller, 100 ... High S oil fuel consumption signal, 101 ... Combustion oxygen concentration signal
Claims (3)
イオウ油焚きボイラから排出された排ガスにアンモニア
を注入してから電気集塵器に送気して前記排ガス中のダ
ストを除去する高イオウ油焚きボイラの排煙処理方法に
おいて、 前記アンモニアが注入される排ガス中の燃焼酸素濃度の
変化に応じて該アンモニアの注入量を調整することを特
徴とする高イオウ油焚きボイラの排煙処理方法。An exhaust gas discharged from a high-sulfur oil-fired boiler using high-sulfur oil having a high sulfur content is injected with ammonia, and then sent to an electric dust collector to remove dust in the exhaust gas. A method for treating smoke from a high-sulfur oil-fired boiler, comprising: adjusting the amount of ammonia to be injected according to a change in the concentration of combustion oxygen in exhaust gas into which the ammonia is injected. Processing method.
た注入比率を求め、該注入比率を前記高イオウ油燃料の
燃料消費量に比例した基本アンモニア注入量に乗算する
ことにより、前記排ガス中に注入するアンモニアの注入
量を調整することを特徴とする請求項１に記載の高イオ
ウ油焚きボイラの排煙処理方法。2. An injection ratio corresponding to a change in the concentration of combustion oxygen in the exhaust gas is obtained, and the injection ratio is multiplied by a basic ammonia injection amount proportional to the fuel consumption of the high sulfur oil fuel, thereby obtaining the exhaust gas. 2. The method of claim 1, wherein the amount of ammonia injected into the boiler is adjusted.
値の場合を１としたときの該定格値に対する比率である
ことを特徴とする請求項２に記載の高イオウ油焚きボイ
ラの排煙処理方法。3. The high sulfur oil fired boiler according to claim 2, wherein the injection ratio is a ratio with respect to the rated value when the combustion oxygen concentration is a rated value. Smoke treatment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000394756A JP3731471B2 (en) | 2000-12-26 | 2000-12-26 | Smoke treatment method for high sulfur oil fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000394756A JP3731471B2 (en) | 2000-12-26 | 2000-12-26 | Smoke treatment method for high sulfur oil fired boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002191935A true JP2002191935A (en) | 2002-07-10 |
| JP3731471B2 JP3731471B2 (en) | 2006-01-05 |
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ID=18860334
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101010727B1 (en) * | 2008-12-19 | 2011-01-24 | 재단법인 포항산업과학연구원 | System and method for removing sulfur oxides from combustion gas |
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- 2000-12-26 JP JP2000394756A patent/JP3731471B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101010727B1 (en) * | 2008-12-19 | 2011-01-24 | 재단법인 포항산업과학연구원 | System and method for removing sulfur oxides from combustion gas |
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| Publication number | Publication date |
|---|---|
| JP3731471B2 (en) | 2006-01-05 |
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