JPS5814980Y2 - Ammonia injection device for exhaust gas denitrification - Google Patents
Ammonia injection device for exhaust gas denitrificationInfo
- Publication number
- JPS5814980Y2 JPS5814980Y2 JP1978022797U JP2279778U JPS5814980Y2 JP S5814980 Y2 JPS5814980 Y2 JP S5814980Y2 JP 1978022797 U JP1978022797 U JP 1978022797U JP 2279778 U JP2279778 U JP 2279778U JP S5814980 Y2 JPS5814980 Y2 JP S5814980Y2
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- gas
- exhaust gas
- supply pipe
- aqueous solution
- 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.)
- Expired
Links
Landscapes
- Nozzles (AREA)
- Treating Waste Gases (AREA)
Description
【考案の詳細な説明】
本考案は排ガス煙道に付設する排ガス脱硝用アンモニア
注入装置に関する。[Detailed Description of the Invention] The present invention relates to an ammonia injection device for exhaust gas denitrification attached to an exhaust gas flue.
従来焼却炉その他の燃焼ガスなる排ガス中のＮＯｘを除
去する脱硝法として、十分なる酸素の存在下にアンモニ
アを供給し、７００℃乃至９５０℃なる高温条件範囲に
釦いて該アンモニアと排ガス中のＮＯｘを反応せしめ不
活性の窒素Ｎ２となし外気に放出する脱硝法がある。Conventionally, as a denitrification method for removing NOx from the flue gas, which is the combustion gas of incinerators and other sources, ammonia is supplied in the presence of sufficient oxygen, and the ammonia and NOx from the flue gas are removed by supplying ammonia in the high temperature range of 700°C to 950°C. There is a denitrification method in which nitrogen is reacted with nitrogen to form inert nitrogen N2 and released into the outside air.
而して焼却炉に連結する排ガス煙道に多数の吹出孔を具
備するアンモニア供給管を複数本挿入してなるアンモニ
ア注入装置が付設され、アンモニアガスを該アンモニア
供給管の吹出孔より煙道内に送入して排ガスにアンモニ
アが供給される。An ammonia injection device is installed in which a plurality of ammonia supply pipes each having a large number of blow-off holes are inserted into the exhaust gas flue connected to the incinerator, and ammonia gas is introduced into the flue through the blow-off holes of the ammonia supply pipes. Ammonia is supplied to the exhaust gas.
前記の如キアンモニア注入装置は構造が簡単であるが、
アンモニア供給管は排ガスの高温なる環境に露出される
ため腐蝕が激しく従って又吹出孔の目詰りも発生し易く
てアンモニアの供給が不均一となり、さらには腐蝕によ
るアンモニア供給管の交換周期が短かくて保守頻度が高
く、且つ保守時のアンモニア供給管取替には煙道の一部
を取外してアンモニア供給管を取出すので入手を要する
などの欠点を有する。Although the ammonia injection device described above has a simple structure,
Since the ammonia supply pipe is exposed to the high-temperature environment of the exhaust gas, it is subject to severe corrosion, and the blow-off holes are easily clogged, resulting in uneven supply of ammonia.Furthermore, due to corrosion, the replacement cycle of the ammonia supply pipe is shortened. This method requires frequent maintenance, and when replacing the ammonia supply pipe during maintenance, a part of the flue must be removed to take out the ammonia supply pipe.
本考案の排ガス脱硝用アンモニア注入装置はこれらの欠
点を解決するものであり、排ガス煙道の内壁面より陥没
する位置に二流体注入ノズルの先端部ヲ設け、該二流体
注入ノズルに、アンモニアガス及び不活性ガス供給管を
付設するガス供給管とアンモニア源水溶液供給管とを連
結してなる排ガス脱硝用アンモニア注入装置であって、
二流体注入ノズルによりアンモニア源水溶液を注入する
と共にアンモニアガスを混入できるようにして、且つ脱
硝用アンモニアを少なくとも何れか一方からでも供給し
うるようになし、又アンモニアを排ガスに供給しないと
きは不活性ガスを流出して二流体注入ノズルを高温排ガ
スより保護し１なる排ガス脱硝用アンモニア注入装置を
提供することを目的とする。The ammonia injection device for exhaust gas denitration of the present invention solves these drawbacks.The tip of the two-fluid injection nozzle is provided at a position sunken from the inner wall surface of the exhaust gas flue, and the ammonia gas is injected into the two-fluid injection nozzle. and an ammonia injection device for exhaust gas denitrification, which connects a gas supply pipe with an inert gas supply pipe and an ammonia source aqueous solution supply pipe,
The ammonia source aqueous solution is injected using a two-fluid injection nozzle, and ammonia gas can also be mixed in. Also, ammonia for denitrification can be supplied from at least one of the two, and when ammonia is not supplied to the exhaust gas, it is inert. It is an object of the present invention to provide an ammonia injection device for exhaust gas denitration, which allows gas to flow out and protects a two-fluid injection nozzle from high-temperature exhaust gas.
な卦、アンモニア源とは、後述の尿素のごとくアンモニ
アを発生し得るもの、アンモニアを含有する（そのもの
である）アンモニアガス、アンモニア水などをいう。Note that an ammonia source refers to something that can generate ammonia, such as urea described below, ammonia gas containing (or itself) ammonia, ammonia water, and the like.
本考案の一実施例を図面に基づいて説明する。An embodiment of the present invention will be described based on the drawings.
１は排ガス煙道、２は排ガス煙道１上部に付設せる二流
体注入ノズルであって、該二流体注入ノズル２の先端は
排ガス煙道の内壁面に陥没して位置せしめられる。1 is an exhaust gas flue, and 2 is a two-fluid injection nozzle attached to the upper part of the exhaust gas flue 1, and the tip of the two-fluid injection nozzle 2 is recessed into the inner wall surface of the exhaust gas flue.
二流体注入ノズル２の中央供給側には不活性ガスを供給
するガス供給管３が連結され、又該ガス供給管３にはア
ンモニアガスを注入するアンモニアガス供給管４を付設
する。A gas supply pipe 3 for supplying an inert gas is connected to the central supply side of the two-fluid injection nozzle 2, and an ammonia gas supply pipe 4 for supplying ammonia gas is attached to the gas supply pipe 3.
尚ガス供給管３及びアンモニアガス供給管４には夫々調
整弁を具備してなり流量の調整が行なわれる。The gas supply pipe 3 and the ammonia gas supply pipe 4 are each equipped with a regulating valve to adjust the flow rate.
又二流体注入ノズル２の外周供給側にはアンモニア源水
溶液供給装置５よりのアンモニア源水溶液供給管６が連
結してなり、アンモニア源水溶液供給管６より二流体注
入ノズル２に供給されるアンモニア源水溶液は二流体注
入ノズル２に供給されるガスと混合されて排ガス煙道１
内に噴霧状に注入する様になす。Further, an ammonia source aqueous solution supply pipe 6 from an ammonia source aqueous solution supply device 5 is connected to the outer peripheral supply side of the two-fluid injection nozzle 2, and an ammonia source supplied from the ammonia source aqueous solution supply pipe 6 to the two-fluid injection nozzle 2. The aqueous solution is mixed with the gas supplied to the two-fluid injection nozzle 2 and the flue gas flue 1
Make sure to inject it into the inside of your body in the form of a spray.
アンモニア源水溶液供給装置５はアンモニア源水溶液貯
留槽７と、該アンモニア源水溶液貯留槽７に連結する送
液ポンプ８と、流量調整用の調整弁を具備するアンモニ
ア源水溶液供給管６よりなる。The ammonia source aqueous solution supply device 5 includes an ammonia source aqueous solution storage tank 7, a liquid feed pump 8 connected to the ammonia source aqueous solution storage tank 7, and an ammonia source aqueous solution supply pipe 6 equipped with a regulating valve for flow rate adjustment.
尚９はガス供給管４の供給側に連結する不活性ガス供給
管である。Note that 9 is an inert gas supply pipe connected to the supply side of the gas supply pipe 4.
排ガス煙道１に脱硝用のアンモニアを注入するには、先
ず高圧空気、水蒸気等を不活性ガス供給管９からガス供
給管３にて二流体注入ノズル２に供給する。In order to inject ammonia for denitration into the exhaust gas flue 1, first, high pressure air, water vapor, etc. are supplied from the inert gas supply pipe 9 to the two-fluid injection nozzle 2 through the gas supply pipe 3.
ガス供給管３にはアンモニアガス供給管４が付設されて
なり、アンモニアガスなるアンモニア源がアンモニアガ
ス供給管４よりガス供給管３に調整弁にて流量を調整し
て供給され、アンモニア源が不活性ガスに混合されてガ
ス供給管３より二流注入ノズル２を経て排ガス煙道１内
の排ガスに供給される。An ammonia gas supply pipe 4 is attached to the gas supply pipe 3, and an ammonia source, which is ammonia gas, is supplied from the ammonia gas supply pipe 4 to the gas supply pipe 3 by adjusting the flow rate with a regulating valve, and when the ammonia source is exhausted. It is mixed with the active gas and supplied to the exhaust gas in the exhaust gas flue 1 from the gas supply pipe 3 via the two-flow injection nozzle 2 .
又アンモニア源水溶液貯留槽Ｉにはアンモニア源水溶液
なるアンモニア水、尿素水等が貯留されてなり、調整弁
にて流量を調整しつつ送液ポンプ８によりアンモニア源
水溶液が送液され二流体注入ノズル２の外周供給側に至
る。In addition, the ammonia source aqueous solution storage tank I stores ammonia source aqueous solution, urea water, etc., and the ammonia source aqueous solution is fed by a liquid feed pump 8 while adjusting the flow rate with a regulating valve to a two-fluid injection nozzle. 2 to the outer peripheral supply side.
而して二流体注入ノズル２の中央供給側にアンモニアガ
スの混合された不活性ガスが供給されてなるため、該ガ
スと共にアンモニア源水溶液が排ガス煙道１内に注入さ
れることとなる。Since the inert gas mixed with ammonia gas is supplied to the central supply side of the two-fluid injection nozzle 2, the ammonia source aqueous solution is injected into the exhaust gas flue 1 together with the gas.
斯くして排ガス煙道１の排ガス中には不活性ガスに混合
されたアンモニアガスのアンモニアとアンモニア源水溶
液貯留槽７よりのアンモニア源水溶液から発生するアン
モニアとが脱硝用のアンモニアとして供給されることと
なる。In this way, ammonia from the ammonia gas mixed with the inert gas and ammonia generated from the ammonia source aqueous solution from the ammonia source aqueous solution storage tank 7 are supplied to the exhaust gas in the exhaust gas flue 1 as ammonia for denitrification. becomes.
尚、塵芥供給量の減少や含水率の増大により、炉内温度
が所定値以下になれば脱硝反応は停止されることはいう
までもない。It goes without saying that the denitrification reaction will be stopped if the temperature inside the furnace falls below a predetermined value due to a decrease in the amount of dust supplied or an increase in the water content.
な釦、注入の際、アンモニアの注入量は排ガス中のＮＯ
ｘ量に対応させるため、アンモニアガスのみのものに比
べ不活性ガスの量だけ噴出量が多くなることとなり、ノ
ズル２が陥没していても十分に煙道内にアンモニアガス
、アンモニア水溶液が種数して脱硝作用が円滑に行なわ
れる。When injecting, the amount of ammonia injected is determined by the amount of NO in the exhaust gas.
In order to correspond to the amount The denitrification effect is carried out smoothly.
本考案の排ガス脱硝用アンモニア注入装置はアンモニア
ガス及び不活性ガスを混合して二流体注入−ノズルより
排ガス煙道内に供給すると共に、アンモニア源水溶液も
二流体流入ノズルを経て前記アンモニアガス混合の不活
性ガスと混合されて排ガス煙道内に供給するのであって
、必要なるアンモニアが確実に供給されるので所期の排
ガス脱硝が行なわれ、又アンモニアガスボンベの切替時
、アンモニア源水溶液使羽終了時その他のためアンモニ
アガス或いはアンモニア源水溶液の何れか一方が供給出
来ない場合でも他方のアンモニア源が供給されるので排
ガスの脱硝が支障な〈実施でき、さらには排ガス煙道内
の排ガスの温度が低下してアンモニアを供給しても排ガ
スの脱硝が行ない得ない場合にはガス供給管へのアンモ
ニアガスの注入を中止し又アンモニア源水溶液を供給す
る送液ポンプを停止してアンモニアの供給を停止すれば
アンモニア源の無駄が無く、シかも二流体注入ノズルに
は不活性ガスが供給され流出しているので二流体注入ノ
ズルを取外さなくても排ガスの高温になる劣化が起らな
いなどの効果を有する。The ammonia injection device for exhaust gas denitration of the present invention mixes ammonia gas and an inert gas and supplies the mixture into the exhaust gas flue through a two-fluid injection nozzle, and also supplies the ammonia source aqueous solution through the two-fluid inflow nozzle to the ammonia gas mixture. It is mixed with active gas and supplied into the exhaust gas flue, and the necessary ammonia is reliably supplied, so the expected exhaust gas denitration is carried out, and it is also used when changing the ammonia gas cylinder, when the ammonia source aqueous solution is used, etc. Therefore, even if either ammonia gas or ammonia source aqueous solution cannot be supplied, the other ammonia source is supplied, so denitration of the exhaust gas can be carried out without any problems, and furthermore, the temperature of the exhaust gas in the exhaust gas flue is reduced. If the exhaust gas cannot be denitrated even after ammonia is supplied, stop the injection of ammonia gas into the gas supply pipe, stop the liquid feed pump that supplies the ammonia source aqueous solution, and stop the ammonia supply. There is no wastage of resources, and since the inert gas is supplied to the two-fluid injection nozzle and flows out, there is no need to remove the two-fluid injection nozzle, which prevents deterioration due to the high temperature of the exhaust gas. .
さらに、注入ノズルの先端を煙道内壁面に陥没して位置
させたので、排ガス煙道中を流れる高温の排ガスにアン
モニア注入ノズル全体が直接露出するのでなく、腐蝕が
激しくなく又目詰りの発生も少なくなりアンモニア注入
ノズルの耐用期間を延長せ□□□うると共に、保修時の
アンモニア注入ノズルの交換が容易である効果もある。Furthermore, since the tip of the injection nozzle is recessed into the inner wall of the flue, the entire ammonia injection nozzle is not directly exposed to the high-temperature exhaust gas flowing in the flue, so corrosion is not severe and clogging is less likely to occur. This not only extends the service life of the ammonia injection nozzle, but also makes it easier to replace the ammonia injection nozzle during maintenance.
図面は本考案の一実施例の説明図である。
１・・・排ガス煙道、２・・・二流体注入ノズル、３・
・・ガス供給管、、 ４・・−アンモニアガス注入管
、５・・・アンモニア源水溶液供給装置、６・・・アン
モーア源水溶液供給管、Ｉ・・・アンモニア源水溶液貯
留槽、・・・送液ポン７．９・・・不活性ガス注入管。The drawing is an explanatory diagram of an embodiment of the present invention. 1... Exhaust gas flue, 2... Two-fluid injection nozzle, 3...
...Gas supply pipe, 4...-Ammonia gas injection pipe, 5...Ammonia source aqueous solution supply device, 6...Ammonia source aqueous solution supply pipe, I...Ammonia source aqueous solution storage tank,...Sending Liquid pump 7.9...Inert gas injection pipe.
Claims (1)
流体注入ノズルを排ガス煙道の内壁面に付設するととも
に、そのノズルの先端を前記内壁面に陥没して位置せし
め、前記ノズルに、アンモニアガスと不活性ガスとの混
合ガス供給管を連通ずるとともにアンモニア源水溶液を
連通して成る排ガス脱硝用アンモニア注入装置。A two-fluid injection nozzle that supplies gas and liquid separately and mixes and injects the two is attached to the inner wall surface of the exhaust gas flue, and the tip of the nozzle is recessed into the inner wall surface, and the nozzle includes: An ammonia injection device for exhaust gas denitration, which is formed by communicating a mixed gas supply pipe of ammonia gas and inert gas and communicating an ammonia source aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978022797U JPS5814980Y2 (en) | 1978-02-22 | 1978-02-22 | Ammonia injection device for exhaust gas denitrification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978022797U JPS5814980Y2 (en) | 1978-02-22 | 1978-02-22 | Ammonia injection device for exhaust gas denitrification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54139043U JPS54139043U (en) | 1979-09-27 |
| JPS5814980Y2 true JPS5814980Y2 (en) | 1983-03-25 |
Family
ID=28858216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978022797U Expired JPS5814980Y2 (en) | 1978-02-22 | 1978-02-22 | Ammonia injection device for exhaust gas denitrification |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814980Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014170711A1 (en) * | 2013-04-17 | 2014-10-23 | Renault Trucks | System for injecting reactants in an exhaust line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525670A (en) * | 1975-07-03 | 1977-01-17 | Niigata Eng Co Ltd | Method of adding chemical gas in exhaust gas treatment apparatus |
| JPS5216470A (en) * | 1975-07-30 | 1977-02-07 | Babcock Hitachi Kk | Nox reducing agent feeding apparatus |
| JPS52135871A (en) * | 1976-05-10 | 1977-11-14 | Hitachi Ltd | Method and apparatus for decreasing nox in combustion exhaust gas |
-
1978
- 1978-02-22 JP JP1978022797U patent/JPS5814980Y2/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525670A (en) * | 1975-07-03 | 1977-01-17 | Niigata Eng Co Ltd | Method of adding chemical gas in exhaust gas treatment apparatus |
| JPS5216470A (en) * | 1975-07-30 | 1977-02-07 | Babcock Hitachi Kk | Nox reducing agent feeding apparatus |
| JPS52135871A (en) * | 1976-05-10 | 1977-11-14 | Hitachi Ltd | Method and apparatus for decreasing nox in combustion exhaust gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54139043U (en) | 1979-09-27 |
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