JP3358862B2 - Ammonia water vaporizer - Google Patents
Ammonia water vaporizerInfo
- Publication number
- JP3358862B2 JP3358862B2 JP06043194A JP6043194A JP3358862B2 JP 3358862 B2 JP3358862 B2 JP 3358862B2 JP 06043194 A JP06043194 A JP 06043194A JP 6043194 A JP6043194 A JP 6043194A JP 3358862 B2 JP3358862 B2 JP 3358862B2
- Authority
- JP
- Japan
- Prior art keywords
- ammonia water
- ammonia
- exhaust gas
- tube
- vaporizer
- 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 - Lifetime
Links
Landscapes
- Treating Waste Gases (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は排ガスの脱硝用のアンモ
ニア水気化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ammonia water vaporizer for denitration of exhaust gas.
【０００２】[0002]
【従来の技術】従来の排ガス脱硝用アンモニア水気化装
置を図５によって説明する。アンモニア水を気化させる
ために、別置きアンモニア水気化器６を設置し、アンモ
ニア水のアトマイズ用媒体とアンモニア水とを混合して
該アンモニア水気化器６内にアトマイズ用ノズル８より
噴霧した後、脱硝反応器１に導かれる排ガスから分岐し
た一部の排ガス中で気化させてアンモニア注入ノズル５
から注入しているため、排ガスファン７、別置きアンモ
ニア水気化器６等が必要ある。なお、図５中、９はアン
モニア水タンク、１０はアンモニア水ポンプを示す。2. Description of the Related Art A conventional ammonia water vaporizer for denitration of exhaust gas will be described with reference to FIG. In order to vaporize the ammonia water, a separate ammonia water vaporizer 6 is installed, and the ammonia water atomizing medium and the ammonia water are mixed and sprayed into the ammonia water vaporizer 6 from the atomizing nozzle 8. Ammonia injection nozzle 5 is vaporized in a part of exhaust gas branched from exhaust gas led to denitration reactor 1.
Therefore, an exhaust gas fan 7, a separate ammonia water vaporizer 6, and the like are required. In FIG. 5, 9 denotes an ammonia water tank, and 10 denotes an ammonia water pump.
【０００３】[0003]
【発明が解決しようとする課題】上述したように、従来
法においては、アンモニア水を気化させるためには、気
化しやすいようにまずアトマイズ用媒体と混合して小さ
いアンモニア水滴として噴霧し、その噴霧されたアンモ
ニア水滴に熱を加えて気化させている。その場合、熱源
として、排ガス系より排ガスを抽出する排ガスファンの
設置並びにアトマイズ用ノズルを備えた別置きアンモニ
ア水気化器の設置が必要となり、系統が複雑であるとい
う問題がある。本発明は上記技術水準に鑑み、従来技術
の問題点を解決できる脱硝用アンモニア水の気化装置を
提供しようとするものである。As described above, in the conventional method, in order to vaporize the ammonia water, the ammonia water is first mixed with an atomizing medium so as to be easily vaporized and sprayed as small ammonia water droplets. The heated ammonia water droplets are vaporized by applying heat. In this case, as a heat source, an exhaust gas fan for extracting exhaust gas from an exhaust gas system and a separately installed ammonia water vaporizer equipped with an atomizing nozzle are required, resulting in a problem that the system is complicated. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned state of the art, and has as its object to provide an ammonia water vaporizer for denitration which can solve the problems of the prior art.
【０００４】[0004]
【課題を解決するための手段】本発明は脱硝反応器の上
流側に位置する排熱回収ボイラ内部又は排ガスダクト内
部又はボイラ後部伝熱部煙道内に、アンモニア水気化用
チューブ内で気化したアンモニアガスと水蒸気を排ガス
中に噴出させるアンモニア注入ノズルを設けたアンモニ
ア水気化用チューブを設置してなることを特徴とする排
ガス脱硝装置用アンモニア水気化装置である。SUMMARY OF THE INVENTION The present invention relates to a method for vaporizing ammonia water inside an exhaust heat recovery boiler or an exhaust gas duct located upstream of a denitration reactor or inside a heat transfer section flue at the rear of a boiler .
Ammonia gas and water vapor vaporized in the tube are exhausted
An ammonia water vaporization device for an exhaust gas denitration device, comprising an ammonia water vaporization tube provided with an ammonia injection nozzle to be jetted into the tube.
【０００５】[0005]
【作用】本発明の作用を図４によって説明する。図４に
示すようにアンモニア水気化用チューブ４内を流れるア
ンモニア水は該チューブ４の外側を流れる排ガスと熱交
換して、徐々に加熱され、温度上昇して気化してアンモ
ニアガスと水蒸気となり、アンモニア注入ノズル５より
噴出し排ガスと混合し脱硝反応器１（図示省略）に導か
れる。The operation of the present invention will be described with reference to FIG. As shown in FIG. 4, the ammonia water flowing in the ammonia water vaporizing tube 4 exchanges heat with the exhaust gas flowing outside the tube 4, is gradually heated, and the temperature rises to vaporize to form ammonia gas and steam, The ammonia gas is mixed with the exhaust gas discharged from the ammonia injection nozzle 5 and guided to the denitration reactor 1 (not shown).
【０００６】[0006]
【実施例】以下、本発明の具体例をあげ、本発明の効果
を明らかにする。 （実施例１）本発明の第１実施例を図１によって説明す
る。この実施例はガスタービン、ディ−ゼルエンジン等
（図示省略）の排ガスを使用した排熱回収ボイラ１２に
適用したものであって、排熱回収ボイラ１２内には多数
の熱交換器（伝熱管）１１が配置され、この間に触媒を
用いた脱硝反応器１が設けられていて、排ガス中の窒素
酸化物をアンモニアガスを注入することによって、無害
な窒素と水に還元する態様のものである。前記熱交換器
１１及び脱硝反応器１の上流に、蛇行したアンモニア水
気化用チューブ４を備え最終端部に多数のアンモニア注
入ノズル５を設けてある。この気化用チューブ４へはア
ンモニア水（又は、尿素水）を常温にて貯蔵したアンモ
ニア水タンク９より、アンモニア水ポンプ１０で昇圧
し、流量を調整弁１３にて調整しつつ、導入管１４を介
して導入する。アンモニア水は常温のアンモニア水タン
ク９から、アンモニア水ポンプ１０により昇圧され又、
流量調整弁１３にて流量を調整しつつ排熱回収ボイラ１
２内に設置したアンモニア水気化用チューブ４へ流れ、
気化した後アンモニア注入ノズル５を通じて注入され
る。EXAMPLES The effects of the present invention will be clarified below with reference to specific examples of the present invention. (Embodiment 1) A first embodiment of the present invention will be described with reference to FIG. This embodiment is applied to an exhaust heat recovery boiler 12 using exhaust gas of a gas turbine, a diesel engine or the like (not shown). In the exhaust heat recovery boiler 12, a large number of heat exchangers (heat transfer tubes) are provided. 11) is arranged, and a denitration reactor 1 using a catalyst is provided between them, in which nitrogen oxides in the exhaust gas are reduced to harmless nitrogen and water by injecting ammonia gas. . A meandering ammonia water vaporization tube 4 is provided upstream of the heat exchanger 11 and the denitration reactor 1, and a large number of ammonia injection nozzles 5 are provided at the final end. Ammonia water (or urea water) is stored into the vaporization tube 4 at normal temperature from an ammonia water tank 9 at an ordinary temperature. Introduce through. Ammonia water is pressurized by an ammonia water pump 10 from an ammonia water tank 9 at room temperature.
Exhaust heat recovery boiler 1 while adjusting the flow rate with flow rate control valve 13
Flows to the ammonia water vaporization tube 4 installed in 2,
After vaporization, it is injected through the ammonia injection nozzle 5.
【０００７】（実施例２）本発明の第２実施例を図２
（ａ），（ｂ）によって説明する。この実施例はボイラ
の排ガスダクト２に設けたもの（図２（ａ））やガスタ
ービンの排ガスダクト２内に設けた（図２（ｂ））もの
であって、排ガスダクト２の系統には触媒を用いた脱硝
反応器１が設けられていて、排ガス中の窒素酸化物をア
ンモニアガスを注入することによって無害な窒素と水に
還元する態様のものである。前記、脱硝反応器１の上流
に蛇行したアンモニア水気化用チューブ４を備え最終端
部に排ガスダクト内全面にアンモニアガスを噴出する多
数のアンモニア注入ノズル５を設けたものである。な
お、アンモニア水の導入系統については前記実施例１と
同じであるので説明は省略する。(Embodiment 2) FIG. 2 shows a second embodiment of the present invention.
This will be described with reference to (a) and (b). This embodiment is provided in a flue gas duct 2 of a boiler (FIG. 2A) or provided in a flue gas duct 2 of a gas turbine (FIG. 2B). A denitration reactor 1 using a catalyst is provided, in which nitrogen oxides in exhaust gas are reduced to harmless nitrogen and water by injecting ammonia gas. A meandering ammonia water vaporizing tube 4 is provided upstream of the denitration reactor 1, and a large number of ammonia injection nozzles 5 for ejecting ammonia gas to the entire exhaust gas duct are provided at the final end. The system for introducing ammonia water is the same as in the first embodiment, and a description thereof will be omitted.
【０００８】（実施例３）次に本発明の第３実施例を図
３によって説明する。この実施例はボイラの後部煙道３
内にアンモニア水気化用チューブ４を設置したものであ
る。ボイラの後部煙道３内には伝熱管１１が多数備えら
れているので、アンモニア水気化用チューブ４は伝熱管
１１の中間部に設けたものであって、これに接続する排
ガスダクト２には脱硝反応器１が備えられている。な
お、アンモニア水の導入系統については前記実施例１と
同じであるので説明は省略する。(Embodiment 3) Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the rear flue 3 of the boiler is used.
A tube 4 for vaporizing ammonia water is installed in the inside. Since a large number of heat transfer tubes 11 are provided in the rear flue 3 of the boiler, the ammonia water vaporizing tube 4 is provided at an intermediate portion of the heat transfer tube 11, and the exhaust gas duct 2 connected to the tube 4 A denitration reactor 1 is provided. The system for introducing ammonia water is the same as in the first embodiment, and a description thereof will be omitted.
【０００９】[0009]
【発明の効果】本発明によれば、アンモニア水気化用チ
ューブは脱硝反応器に導かれる排ガスが流れる排熱回収
ボイラ内、もしくは排ガスダクト内もしくはボイラ後部
伝熱部煙道内に容易に設置可能であり、系統は単純とな
り、排ガスファンや別置きアンモニア水気化器が不要と
なり、従来法におけるような装置の複雑性が改善され
る。According to the present invention, the ammonia water vaporizing tube can be easily installed in the exhaust heat recovery boiler through which the exhaust gas guided to the denitration reactor flows, in the exhaust gas duct, or in the heat transfer section flue at the rear of the boiler. Yes, the system is simpler, no exhaust gas fan or separate ammonia water vaporizer is required, and the complexity of the device as in the conventional method is improved.
【図１】本発明の排熱回収ボイラへの適用例の説明図。FIG. 1 is an explanatory diagram of an application example of the present invention to an exhaust heat recovery boiler.
【図２】本発明のガスダクトへの適用例の説明図。FIG. 2 is an explanatory view of an application example of the present invention to a gas duct.
【図３】本発明のボイラへの適用例の説明図。FIG. 3 is an explanatory diagram of an application example of the present invention to a boiler.
【図４】本発明のアンモニア水気化装置の作用の説明
図。FIG. 4 is a diagram illustrating the operation of the ammonia water vaporizer of the present invention.
【図５】従来のアンモニア水気化装置の一態様の説明
図。FIG. 5 is an explanatory view of one embodiment of a conventional ammonia water vaporizer.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−313324（ＪＰ，Ａ) 特開 平６−154552（ＪＰ，Ａ) 実開 昭57−187625（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/34 - 53/96 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-313324 (JP, A) JP-A-6-154552 (JP, A) Japanese Utility Model Showa 57-187625 (JP, U) (58) Field (Int.Cl. 7 , DB name) B01D 53/34-53/96
Claims (1)
ボイラ内部又は排ガスダクト内部又はボイラ後部伝熱部
煙道内に、アンモニア水気化用チューブ内で気化したア
ンモニアガスと水蒸気を排ガス中に噴出させるアンモニ
ア注入ノズルを設けたアンモニア水気化用チューブを設
置してなることを特徴とする排ガス脱硝装置用アンモニ
ア水気化装置。1. An air vaporized in an ammonia water vaporization tube is disposed inside an exhaust heat recovery boiler, an exhaust gas duct, or a flue at the rear of a boiler located upstream of a denitration reactor.
Ammonia that emits ammonia gas and water vapor into exhaust gas
(1) An ammonia water vaporizer for an exhaust gas denitration device, comprising an ammonia water vaporizer tube provided with an injection nozzle .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06043194A JP3358862B2 (en) | 1994-03-30 | 1994-03-30 | Ammonia water vaporizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06043194A JP3358862B2 (en) | 1994-03-30 | 1994-03-30 | Ammonia water vaporizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07265660A JPH07265660A (en) | 1995-10-17 |
| JP3358862B2 true JP3358862B2 (en) | 2002-12-24 |
Family
ID=13142056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06043194A Expired - Lifetime JP3358862B2 (en) | 1994-03-30 | 1994-03-30 | Ammonia water vaporizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3358862B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4969149B2 (en) * | 2006-05-18 | 2012-07-04 | バブコック日立株式会社 | Ammonia injection device and method for exhaust heat recovery boiler |
| KR100884657B1 (en) * | 2007-06-20 | 2009-02-23 | 주식회사 파나시아 | Exhaust Gas of High Temperature Denitrifing System and Denitrifing Method using the System |
-
1994
- 1994-03-30 JP JP06043194A patent/JP3358862B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07265660A (en) | 1995-10-17 |
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