JPH1057764A - Ammonia diffusion accelerating device in waste gas denitrification system - Google Patents
Ammonia diffusion accelerating device in waste gas denitrification systemInfo
- Publication number
- JPH1057764A JPH1057764A JP8217234A JP21723496A JPH1057764A JP H1057764 A JPH1057764 A JP H1057764A JP 8217234 A JP8217234 A JP 8217234A JP 21723496 A JP21723496 A JP 21723496A JP H1057764 A JPH1057764 A JP H1057764A
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- injection
- waste gas
- ammonia injection
- exhaust gas
- 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
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ガスタービンや
ボイラ、加熱炉、コージネーションプラント、都市ごみ
焼却炉等の排ガスに含まれる窒素酸化物（ＮＯｘ）を選
択的接触還元によって除去する排ガス脱硝システムにお
いて、還元剤としてのアンモニアを排ガスダクト内に注
入するための装置に関し、より詳しくは排ガスダクト内
に注入されたアンモニアガスの拡散を促進させる装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas denitration system for selectively removing nitrogen oxides (NOx) contained in exhaust gas from gas turbines, boilers, heating furnaces, coordination plants, municipal waste incinerators and the like. The present invention relates to a device for injecting ammonia as a reducing agent into an exhaust gas duct, and more particularly to a device for promoting diffusion of ammonia gas injected into an exhaust gas duct.
【０００２】[0002]
【従来の技術】排ガス脱硝システムにおいて、アンモニ
ア注入装置は、図２に示すように、ガスタービンやボイ
ラ、加熱炉、コージネーションプラント、都市ごみ焼却
炉等のＮＯｘ含有排ガス発生源と反応器との間に配設さ
れた排ガスダクト内において、排ガス温度が適切となる
所定位置に配置されて、アンモニア発生装置から供給さ
れた還元剤としての気化アンモニアガスをダクト内に供
給するものである。2. Description of the Related Art In an exhaust gas denitration system, as shown in FIG. 2, an ammonia injection device is provided between a NOx-containing exhaust gas generation source such as a gas turbine, a boiler, a heating furnace, a coagulation plant, a municipal waste incinerator and a reactor. In the exhaust gas duct disposed therebetween, the exhaust gas duct is disposed at a predetermined position where the exhaust gas temperature is appropriate, and supplies vaporized ammonia gas as a reducing agent supplied from the ammonia generator into the duct.
【０００３】従来のアンモニア注入装置では、図３に示
すように、隣り合うアンモニア注入管(21)の対向側面に
設けられた注入ノズル(22)同士が互いに向き合うように
設けられていた。In a conventional ammonia injection apparatus, as shown in FIG. 3, injection nozzles (22) provided on opposite side surfaces of adjacent ammonia injection pipes (21) are provided so as to face each other.
【０００４】しかし、上記のような対向配列ではノズル
から遠く離れた部分、すなわち対向する一対のノズルと
これらに隣合うもう一対の対向ノズルとの中央にあっ
て、２本のアンモニア注入管の中央にある部分には、ア
ンモニアが排ガス中に均等に拡散しにくく、そのため脱
硝効率が低下する恨みがあった。However, in the above-described facing arrangement, the center of the two ammonia injection pipes is located far from the nozzle, that is, at the center between a pair of facing nozzles and another pair of opposed nozzles adjacent thereto. There was a grudge that ammonia was difficult to diffuse evenly in the exhaust gas, thereby reducing the denitration efficiency.
【０００５】[0005]
【発明が解決しようとする課題】この発明は、上記の点
に鑑み、アンモニアガスを排ガス中に均等に拡散させ
て、排ガスの脱硝効率を高めることができる手段を提供
することを目的とする。SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a means capable of uniformly diffusing ammonia gas into exhaust gas to improve the denitration efficiency of the exhaust gas.
【０００６】[0006]
【課題を解決するための手段】この発明は、多数の注入
ノズルを有する複数本の平行状アンモニア注入管からな
つグリッドが排ガスダクト内に配置されてなるアンモニ
ア注入装置において、隣合うアンモニア注入管の対向側
面に設けられた注入ノズル同士が互いに千鳥配置になさ
れている、排ガス脱硝システムにおけるアンモニア拡散
促進装置である。SUMMARY OF THE INVENTION The present invention is directed to an ammonia injection apparatus in which a grid composed of a plurality of parallel ammonia injection pipes having a large number of injection nozzles is arranged in an exhaust gas duct. This is an ammonia diffusion promoting device in an exhaust gas denitration system in which injection nozzles provided on opposing side surfaces are arranged in a staggered manner.
【０００７】[0007]
【発明の実施の形態】図１において、アンモニア注入装
置は排ガスダクト内にアンモニア注入グリッドが配置さ
れてなる。同グリッドは多数の注入ノズルを有する複数
本の平行状アンモニア注入管からなる。隣合う上下アン
モニア注入管(1)(11) の対向側面には、多数の注入ノズ
ル(2)(12) が互いに千鳥配置になるように設けられてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, an ammonia injection device has an ammonia injection grid arranged in an exhaust gas duct. The grid consists of a plurality of parallel ammonia injection tubes with multiple injection nozzles. A large number of injection nozzles (2) and (12) are provided on the opposing side surfaces of the adjacent upper and lower ammonia injection pipes (1) and (11) so as to be staggered.
【０００８】このような千鳥配置では、図３に示す対向
配置に比べ、隣合うアンモニア注入管の間のどの位置か
らもノズルまでの距離が近くなり、排ガス中へのアンモ
ニアガスの均等拡散が可能となる。In such a staggered arrangement, as compared with the opposed arrangement shown in FIG. 3, the distance from any position between the adjacent ammonia injection pipes to the nozzle is shorter, and the ammonia gas can be uniformly diffused into the exhaust gas. Becomes
【０００９】たとえば、図１において、上下２本の隣接
するアンモニア注入管(1)(11) の間の中央に位置し、か
つ上側注入ノズル(2) の真下に位置する点(A) では、こ
の点と下側アンモニア注入管(11) の注入ノズル(12)と
の距離は変らないが、この点と上側アンモニウム注入管
(1) の注入ノズル(2) との距離は短くなり、また、下側
アンモニア注入管(11) の注入ノズル(12)の斜め方向の
吹き出し(13)と、上側アンモニウム注入管(1) の注入ノ
ズル(2) の斜め方向の吹き出し(3) との距離も短くなっ
た。For example, in FIG. 1, at a point (A) located at the center between two upper and lower adjacent ammonia injection pipes (1) and (11) and directly below the upper injection nozzle (2), The distance between this point and the injection nozzle (12) of the lower ammonia injection pipe (11) does not change.
The distance from the injection nozzle (2) of (1) becomes shorter, and the oblique blowing (13) of the injection nozzle (12) of the lower ammonia injection pipe (11) and the upper ammonium injection pipe (1) are reduced. The distance between the injection nozzle (2) and the blowout (3) in the oblique direction has also become shorter.
【００１０】その結果、アンモニアガスは排ガス中に均
等に拡散され、排ガスの脱硝効率の向上が達成される。[0010] As a result, the ammonia gas is evenly diffused in the exhaust gas, and the denitration efficiency of the exhaust gas is improved.
【００１１】[0011]
【発明の効果】この発明によれば、注入ノズルが千鳥配
置になされているので、アンモニアガスを排ガス中に均
等に拡散させることができる。特に、従来のアンモニア
注入装置では各アンモニウム注入ノズルが受け持つ領域
が及ばないデッドゾーンが生じることが避けられなかっ
たが、この発明によるアンモニア注入装置ではこのよう
なゾーンにおけるアンモニア拡散が改善され、これによ
って排ガスの脱硝効率を向上させることができる。ま
た、従来と同じ脱硝性能でよい場合には、アンモニア注
入装置から反応器までのダクト距離を短縮することがで
きる。According to the present invention, since the injection nozzles are arranged in a staggered arrangement, the ammonia gas can be evenly diffused in the exhaust gas. In particular, in the conventional ammonia injection device, it is inevitable that a dead zone that does not extend to the area covered by each ammonium injection nozzle occurs, but the ammonia injection device according to the present invention improves ammonia diffusion in such a zone, The efficiency of denitration of exhaust gas can be improved. Further, if the same denitration performance as in the past is sufficient, the duct distance from the ammonia injection device to the reactor can be reduced.
【図１】この発明の実施例のアンモニア注入装置を示す
断面図である。FIG. 1 is a sectional view showing an ammonia injection device according to an embodiment of the present invention.
【図２】排ガス脱硝システムを示すフローシートであ
る。FIG. 2 is a flow sheet showing an exhaust gas denitration system.
【図３】従来のアンモニア注入装置を示す断面図であ
る。FIG. 3 is a sectional view showing a conventional ammonia injection device.
(1)(11) ：アンモニア注入管 (2)(12) …注入ノズル (1) (11) ： Ammonia injection tube (2) (12)… Injection nozzle
Claims (1)
状アンモニア注入管からなるグリッドが排ガスダクト内
に配置されてなるアンモニア注入装置において、隣合う
アンモニア注入管の対向側面に設けられた注入ノズル同
士が互いに千鳥配置になされている、排ガス脱硝システ
ムにおけるアンモニア拡散促進装置。1. An ammonia injection device comprising a grid of a plurality of parallel ammonia injection tubes having a large number of injection nozzles arranged in an exhaust gas duct, wherein injection nozzles are provided on opposite sides of adjacent ammonia injection tubes. An ammonia diffusion promoting device in an exhaust gas denitration system, wherein the devices are arranged in a staggered manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8217234A JPH1057764A (en) | 1996-08-19 | 1996-08-19 | Ammonia diffusion accelerating device in waste gas denitrification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8217234A JPH1057764A (en) | 1996-08-19 | 1996-08-19 | Ammonia diffusion accelerating device in waste gas denitrification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1057764A true JPH1057764A (en) | 1998-03-03 |
Family
ID=16700960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8217234A Pending JPH1057764A (en) | 1996-08-19 | 1996-08-19 | Ammonia diffusion accelerating device in waste gas denitrification system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1057764A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101351943B1 (en) * | 2012-11-27 | 2014-01-22 | 주식회사 포스코 | Dust collecting apparatus and iron treatment apparatus using the same |
| JP2014061514A (en) * | 2013-09-11 | 2014-04-10 | Mitsubishi Heavy Ind Ltd | Exhaust gas treatment device and exhaust gas treatment system |
| JP2015507163A (en) * | 2011-12-15 | 2015-03-05 | ゼネラル・エレクトリック・カンパニイ | Method and apparatus for injecting reagents into an SNCR / SCR exhaust system for a boiler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119326A (en) * | 1982-01-11 | 1983-07-15 | Mitsubishi Heavy Ind Ltd | Ammonia injection in denitrification of flue gas |
| JPS58107133U (en) * | 1982-01-11 | 1983-07-21 | 三菱重工業株式会社 | Ammonia injection device |
| JPH0386030U (en) * | 1989-12-20 | 1991-08-30 | ||
| JPH0889754A (en) * | 1994-09-19 | 1996-04-09 | Mitsubishi Heavy Ind Ltd | Device for injecting gaseous ammonia |
-
1996
- 1996-08-19 JP JP8217234A patent/JPH1057764A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58119326A (en) * | 1982-01-11 | 1983-07-15 | Mitsubishi Heavy Ind Ltd | Ammonia injection in denitrification of flue gas |
| JPS58107133U (en) * | 1982-01-11 | 1983-07-21 | 三菱重工業株式会社 | Ammonia injection device |
| JPH0386030U (en) * | 1989-12-20 | 1991-08-30 | ||
| JPH0889754A (en) * | 1994-09-19 | 1996-04-09 | Mitsubishi Heavy Ind Ltd | Device for injecting gaseous ammonia |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015507163A (en) * | 2011-12-15 | 2015-03-05 | ゼネラル・エレクトリック・カンパニイ | Method and apparatus for injecting reagents into an SNCR / SCR exhaust system for a boiler |
| KR101351943B1 (en) * | 2012-11-27 | 2014-01-22 | 주식회사 포스코 | Dust collecting apparatus and iron treatment apparatus using the same |
| JP2014061514A (en) * | 2013-09-11 | 2014-04-10 | Mitsubishi Heavy Ind Ltd | Exhaust gas treatment device and exhaust gas treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107152328B (en) | System and method for mixing tempered air with flue gas for thermal SCR catalyst | |
| JP5752367B2 (en) | System and method for injecting cooling air into an exhaust gas stream | |
| US5555718A (en) | Method and apparatus for injecting reactant for catalytic reduction in a gas turbine combined cycle system | |
| JP3175943B2 (en) | Apparatus and method for injecting NOx reducing agents | |
| US5988115A (en) | SCR reactant injection grid | |
| KR100629645B1 (en) | Method for treating emissions | |
| JPH01163426A (en) | Multi-venturi pipe fuel injector for catalyst utilizing combustion apparatus | |
| JPH1057764A (en) | Ammonia diffusion accelerating device in waste gas denitrification system | |
| US7056478B1 (en) | Emission treatment system | |
| CA2163842C (en) | Low nox integrated boiler-burner apparatus | |
| KR101730545B1 (en) | Low NOx burner | |
| JP3858132B2 (en) | Ammonia injection system for exhaust gas denitration system | |
| KR100477433B1 (en) | Ammonia Mixing Device in Exhaust Gas Duct | |
| EP3853527B1 (en) | Nox abatement system for a stationary burning system | |
| JP3002452B1 (en) | High efficiency flue gas denitration system | |
| EP4299163A1 (en) | Heat exchange piping configuration for vaporizing ammonia in denitrification device | |
| JPH1128337A (en) | Method for supplying ammonia in denitration device | |
| JPH0229368Y2 (en) | ||
| JPS5924106A (en) | Burner | |
| KR101822997B1 (en) | Low NOx burner | |
| WO2001000303A1 (en) | Selective catalytic reduction system for a fossil fuel-fired furnace operation | |
| KR200308776Y1 (en) | Dual nozzle type over fire air port | |
| KR200310700Y1 (en) | Double Injection Nozzle for a Ammonia Supply | |
| JPH1057768A (en) | Ammonia feeder in denitrater | |
| KR20230033127A (en) | Integrated reduction apparatus for pollutants and white smoke in flue gas and combustion system comprising the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040406 |