JPS6146225A - Operating method of denitration apparatus in period of light load for furnace - Google Patents
Operating method of denitration apparatus in period of light load for furnaceInfo
- Publication number
- JPS6146225A JPS6146225A JP59167419A JP16741984A JPS6146225A JP S6146225 A JPS6146225 A JP S6146225A JP 59167419 A JP59167419 A JP 59167419A JP 16741984 A JP16741984 A JP 16741984A JP S6146225 A JPS6146225 A JP S6146225A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- waste gas
- furnace
- denitrification device
- light load
- 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
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、火炉低負荷、時における脱硝装置の運転方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of operating a denitrification device when a furnace is under low load.
［従来の技術１
第２図はボイラ火炉からの排ガスの脱硝を行う従来方式
の一例を示すもので、押込通ｆｆ１ｉｌからの燃焼用空
気２が熱交換ｆｓ３によって予熱されてボイラ火炉４に
供給され、他方ボイラ火炉４からの排ガス５が脱硝装置
６及び前記熱交換器３を介して煙突に導かれるようにな
っており、且つｔｉＪ記脱硝装−９８に導入される前の
排ガスＳの一部が配′１１１及び排ガス混合ファン８を
介９て前記燃焼用空気２に混合されるようになっている
。[Prior art 1] Fig. 2 shows an example of a conventional method for denitrifying exhaust gas from a boiler furnace, in which combustion air 2 from the forced passage ff1il is preheated by heat exchange fs3 and supplied to the boiler furnace 4. On the other hand, the exhaust gas 5 from the boiler furnace 4 is guided to the chimney via the denitrification device 6 and the heat exchanger 3, and a part of the exhaust gas S before being introduced into the denitrification device-98. is mixed into the combustion air 2 via the exhaust gas mixing fan 8 and the exhaust gas mixing fan 8.
上記において、ボイラ火炉４の低負荷時、脱４１１装Ｍ
６部での、ガス流速がある値よ°り低くなると、触媒部
ト煤塵等＆、＋る詰りを生じるために、この値、を考−
慮し工低負荷時における脱硝装置６の排ガス６の流速声
決定するようにしていた。In the above, when the boiler furnace 4 is under low load, the 411 M
If the gas flow rate in Part 6 is lower than a certain value, the catalyst part will be clogged with soot and dust, so consider this value.
In consideration of this, the flow rate of the exhaust gas 6 of the denitrification device 6 was determined when the equipment was under low load.
従って従来・、脱硝装−６の健全性からはボイラ火炉４
の負荷を成る限度以下とすることはできず、また敢えて
ボイラ火炉４の負荷を低下せざるを得ない場合には脱硝
装置６の健全性を無視しなければならない問題を有して
いた。Therefore, from the soundness of conventional denitrification equipment-6, boiler furnace 4
The load on the boiler furnace 4 cannot be lowered below the specified limit, and if the load on the boiler furnace 4 has to be lowered, the integrity of the denitrification device 6 must be ignored.
［発明が解決しようとする問題点］
本発明は、火炉低負荷時における脱硝装置内の排ガス流
速を所定ｍａ上に保持させて脱硝装置の健全性を図ろう
とするものである。[Problems to be Solved by the Invention] The present invention aims to improve the integrity of the denitrification device by maintaining the exhaust gas flow rate within the denitrification device above a predetermined ma during low furnace load.
［問題点を解決するための手段］
本発明は火炉低負荷時、脱硝装置の出側排ガスの一部を
排ガス混合ファンを利用して脱硝装置の入側に循環させ
ることにより脱硝装置内の排ガス流速を所定値以上に保
持して、脱硝装置の健全性を確保するようにした火炉低
負荷時の脱硝装置運転方法、に係るものである。[Means for Solving the Problems] The present invention improves the exhaust gas inside the denitrification device by circulating a part of the exhaust gas on the outlet side of the denitrification device to the inlet side of the denitrification device using an exhaust gas mixing fan when the furnace load is low. The present invention relates to a method for operating a denitrification device during low furnace load, in which the flow rate is maintained at a predetermined value or higher to ensure the integrity of the denitrification device.
［実 施 例］ 以下本発明の実施例を図面を参照しつつ説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の一例を示すもので、前記第２図に示し
たものと同様に、押込通風Ｉ１１からの燃焼用空隼２が
熱交換器３を介してボイラ火炉４に供給され、他方ボイ
ラ火炉４からの排ガス５が脱硝装［６及び前記熱交換器
３を介して煙突に導かれ、更に脱硝装置６上流側の排ガ
ス５の一部が配管７及び排ガス混合ファン８を介して前
記燃焼用空気２に混合されるようにした構成を有してい
る。FIG. 1 shows an example of the present invention, in which, like the one shown in FIG. On the other hand, the exhaust gas 5 from the boiler furnace 4 is guided to the chimney via the denitrification device [6] and the heat exchanger 3, and a part of the exhaust gas 5 on the upstream side of the denitrification device 6 is further passed through the pipe 7 and the exhaust gas mixing fan 8. It has a configuration in which it is mixed with the combustion air 2.
上記構成において、脱硝装置１６の排ガス５の出側と前
記排ガス混合ファン８の誘引側との間を循環ガス取出管
９・にて接続すると共に、前記排ガス混合）１ン８の吐
出側と前記脱硝装置６の排ガス５の入側との間を循環ガ
ス供給ｇ１１０にて接続することにより、排ガス混合フ
ァン８を利用した排ガス循環流路を構成する。図中、１
１゜１２．１３，１４．１５はダンパを示す。In the above configuration, the output side of the exhaust gas 5 of the denitrification device 16 and the induction side of the exhaust gas mixing fan 8 are connected by the circulating gas take-off pipe 9, and the discharge side of the exhaust gas mixing fan 8 is connected to the induction side of the exhaust gas mixing fan 8. By connecting the inlet side of the exhaust gas 5 of the denitrification device 6 with the circulating gas supply g110, an exhaust gas circulation flow path using the exhaust gas mixing fan 8 is configured. In the figure, 1
1°12.13 and 14.15 indicate dampers.
ボイラ火炉４の通常の運転状態のときには、ダンパ１２
，１３．１５のみが開けられて所要派の排ガス５が配管
１及び排ガス混合ファン８を介して燃焼用空気２に供給
されている。When the boiler furnace 4 is in a normal operating state, the damper 12
, 13 and 15 are opened, and the required amount of exhaust gas 5 is supplied to the combustion air 2 via the piping 1 and the exhaust gas mixing fan 8.
上記状態からボイラ火炉４の燃焼が低負荷運転となると
、排ガス５の流量が減少して流速が低下するために排ガ
ス中の煤塵が脱硝装置６の触媒に付着堆積して詰りを生
じることになる。When the combustion of the boiler furnace 4 is operated under low load from the above state, the flow rate of the exhaust gas 5 decreases and the flow velocity decreases, so the soot and dust in the exhaust gas adheres to and accumulates on the catalyst of the denitrification device 6, causing clogging. .
このため、ダンパ１１，１４を開けて脱硝装置６の出側
の排ガス５の一部を、循環ガス取出管９、排ガス混合フ
ァン８及び循環ガス供給管１０を介して脱硝装置６の入
側に循環供給させるようにする。これにより脱硝装置６
を流れる排ガスの １流速を所定値より高めて
脱硝装置６の健全性を確保することができる。尚この際
、燃焼用空気２への排ガスの混合が不要な場合にはダン
パ１２゜１５は閉じておき、また必要なときには排ガス
の混合必要量に応じてダンパ’１２ 、１５を開くよう
偶整する。Therefore, by opening the dampers 11 and 14, a part of the exhaust gas 5 on the outlet side of the denitrification device 6 is transferred to the inlet side of the denitrification device 6 via the circulating gas take-off pipe 9, the exhaust gas mixing fan 8, and the circulating gas supply pipe 10. Make sure to circulate the supply. As a result, the denitrification device 6
The integrity of the denitrification device 6 can be ensured by increasing the flow rate of the exhaust gas flowing through the denitrification device 6 above a predetermined value. At this time, the dampers 12 and 15 are kept closed when it is not necessary to mix the exhaust gas into the combustion air 2, and when it is necessary, the dampers 12 and 15 are adjusted to open according to the required amount of exhaust gas to be mixed. do.
上記によれば、排ガス混合ファン８は、排ガスの混合と
、脱硝装置６における排ガスの流速確保のための排ガス
循環の両刃を兼用して行うことができる。また、上記′
において排ガス混合ファン８の誘引側を循環ガス取出管
９のみとして配管７を省略することも考え−られるが、
この場合には脱硝装置［６における触ｌ５ｆｆｉの増大
を招くことになって好ましくない。According to the above, the exhaust gas mixing fan 8 can serve both of the functions of mixing the exhaust gas and circulating the exhaust gas to ensure the flow rate of the exhaust gas in the denitrification device 6. Also, the above
It is also conceivable to omit the piping 7 by using only the circulating gas extraction pipe 9 on the induction side of the exhaust gas mixing fan 8.
In this case, it is not preferable because it will lead to an increase in the amount of 15ffi in the denitrification device [6].
尚、本発明は上記実施例にのみ限定されるものではなく
、本発明の要旨を逸脱しない範囲内・において種々変更
を加え得るものである。It should be noted that the present invention is not limited only to the above-mentioned embodiments, and various changes may be made within the scope and spirit of the present invention.
［発明の効果］
上記したように、本発明の火炉低負荷時の脱硝装置運転
方法によれば、脱硝装置出側の排ガスの一部を排ガス混
合ファンを利用して入側に循環させることにより、火炉
低負荷時に脱硝装置内を流れる排ガスの速度を所定値よ
り大きくするようにしたので、脱硝装置内に煤塵が付着
堆積して触媒の粘りを生じるような問題を排除すること
ができ、しかも排ガスの混合と循環を同一の排ガス混合
ファンによって兼用させているので別！１７ ｙン設諺
に比して所内動力の低減も図れる等の優れた効果を奏し
得る。[Effects of the Invention] As described above, according to the method of operating the denitrification equipment at low load in the furnace of the present invention, a part of the exhaust gas on the outlet side of the denitrification equipment is circulated to the inlet side using the exhaust gas mixing fan. Since the speed of the exhaust gas flowing through the denitrification device is set higher than a predetermined value when the furnace is under low load, it is possible to eliminate problems such as soot and dust adhering and accumulating in the denitrification device and causing stickiness of the catalyst. This is different because the same exhaust gas mixing fan is used to mix and circulate the exhaust gas! Compared to the 17 yen construction, it is possible to achieve superior effects such as reducing the power consumption within the station.
第１図は本発明の方法を実施する装置の一例を示す説明
図、第２図は従来装置の一例を示す説明図である。
１は押込通風機、４はボイラ火炉、６は脱硝Ｍｉｌｌ、
７は配管、８は排ガス混合ファン、９は循環ガス取出管
、１１は循環ガス供給管を示す。FIG. 1 is an explanatory diagram showing an example of an apparatus for carrying out the method of the present invention, and FIG. 2 is an explanatory diagram showing an example of a conventional apparatus. 1 is a forced draft fan, 4 is a boiler furnace, 6 is a denitrification mill,
7 is a pipe, 8 is an exhaust gas mixing fan, 9 is a circulating gas take-off pipe, and 11 is a circulating gas supply pipe.
Claims (1)
ガス混合ファンを利用して脱硝装置の入側に循環させる
ことにより脱硝装置内の排ガス流速を所定値以上に保持
することを特徴とする火炉低負荷時の脱硝装置運転方法
。1) When the load of the furnace is low, a part of the exhaust gas on the outlet side of the denitrification device is circulated to the inlet side of the denitrification device using an exhaust gas mixing fan to maintain the flow rate of the exhaust gas in the denitrification device above a predetermined value. Features: How to operate the denitrification equipment during low furnace load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59167419A JPS6146225A (en) | 1984-08-10 | 1984-08-10 | Operating method of denitration apparatus in period of light load for furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59167419A JPS6146225A (en) | 1984-08-10 | 1984-08-10 | Operating method of denitration apparatus in period of light load for furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6146225A true JPS6146225A (en) | 1986-03-06 |
Family
ID=15849346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59167419A Pending JPS6146225A (en) | 1984-08-10 | 1984-08-10 | Operating method of denitration apparatus in period of light load for furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6146225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108826333A (en) * | 2018-06-06 | 2018-11-16 | 华电电力科学研究院有限公司 | A kind of neighbour's furnace intersects the system and its operation method of the wide load denitration of carbonated drink realization |
-
1984
- 1984-08-10 JP JP59167419A patent/JPS6146225A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108826333A (en) * | 2018-06-06 | 2018-11-16 | 华电电力科学研究院有限公司 | A kind of neighbour's furnace intersects the system and its operation method of the wide load denitration of carbonated drink realization |
| CN108826333B (en) * | 2018-06-06 | 2023-06-23 | 华电电力科学研究院有限公司 | System for realizing wide-load denitration by adjacent furnace cross steam-water and operation method thereof |
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