JP3354756B2 - Reducing agent injection device for denitration equipment - Google Patents
Reducing agent injection device for denitration equipmentInfo
- Publication number
- JP3354756B2 JP3354756B2 JP19848895A JP19848895A JP3354756B2 JP 3354756 B2 JP3354756 B2 JP 3354756B2 JP 19848895 A JP19848895 A JP 19848895A JP 19848895 A JP19848895 A JP 19848895A JP 3354756 B2 JP3354756 B2 JP 3354756B2
- Authority
- JP
- Japan
- Prior art keywords
- reducing agent
- boiler
- denitration
- injection device
- 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.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、還元剤としてアン
モニア水、もしくは尿素水を使用するボイラ発電プラン
トの触媒脱硝装置に適用され、還元剤水溶液の蒸発用熱
源として空気予熱器からの熱空気を使用するようにした
還元剤注入装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a catalytic denitration apparatus of a boiler power plant using ammonia water or urea water as a reducing agent, and uses hot air from an air preheater as a heat source for evaporating a reducing agent aqueous solution. The present invention relates to a reducing agent injection device to be used.
【０００２】[0002]
【従来の技術】触媒脱硝装置は、ボイラ等の煙源に含ま
れる窒素酸化物を触媒で除去低減するもので、当窒素酸
化物の還元作用にアンモニア系の物質を使用する。一般
的に、純粋アンモニアを使用する場合が多いが、ハンド
リングや安全上の理由でアンモニア水や尿素水などの水
溶液を使用することもある。これらの還元剤水溶液は、
窒素酸化物を含むボイラ排ガスと均等に混ぜるため、熱
ガスもしくは熱空気を加え気化希釈後、触媒前流で均一
に煙道内に噴射する。2. Description of the Related Art A catalytic denitration apparatus is a device for removing and reducing nitrogen oxides contained in a smoke source of a boiler or the like by a catalyst, and uses an ammonia-based substance for a reducing action of the nitrogen oxides. Generally, pure ammonia is often used, but an aqueous solution such as aqueous ammonia or urea may be used for handling and safety reasons. These reducing agent aqueous solutions
In order to uniformly mix with the boiler exhaust gas containing nitrogen oxides, hot gas or hot air is added to evaporate and dilute, and then uniformly injected into the flue in front of the catalyst.
【０００３】従来のこのような還元剤水溶液を蒸発させ
る熱源及び希釈媒体として、大きく分類して次の２通り
の方法があった。[0003] Conventionally, there are the following two methods as a heat source and a diluting medium for evaporating the aqueous solution of the reducing agent.
【０００４】（１）ボイラ排ガス系から抽出した排ガス
の熱を利用する方法。(1) A method utilizing heat of exhaust gas extracted from a boiler exhaust gas system.
【０００５】（２）電気加熱器で熱した大気を使用する
方法。(2) A method using the atmosphere heated by an electric heater.
【０００６】図２は上記（１）の方法を適用したボイラ
発電プラントにおける還元剤注入装置のシステム系統図
である。図において、１はボイラ、２は触媒脱硝装置、
３は空気予熱器、４は煙道、６は還元剤水溶液供給管、
７は蒸発器、８は還元剤分配管寄せ、９は誘引ファン、
１０は押込み通風機、１１は空気供給管、１２は還元剤
供給管、１４は排ガス抽出管である。FIG. 2 is a system diagram of a reducing agent injection device in a boiler power plant to which the method (1) is applied. In the figure, 1 is a boiler, 2 is a catalytic denitration device,
3 is an air preheater, 4 is a flue, 6 is a reducing agent aqueous solution supply pipe,
7 is an evaporator, 8 is a pipe for reducing agent distribution pipe, 9 is an induction fan,
Reference numeral 10 denotes a forced draft fan, 11 denotes an air supply pipe, 12 denotes a reducing agent supply pipe, and 14 denotes an exhaust gas extraction pipe.
【０００７】このような図２に示すシステムでは、押込
み通風機１０から空気が空気予熱器３で加熱され、空気
供給管１１よりボイラ１に供給され、ボイラ１からの排
ガスは脱硝装置２で窒素酸化物が除去され、煙道４から
空気予熱器３に入り、ここで空気と熱交換した後、煙突
より排出される。In such a system shown in FIG. 2, air is heated from an air blower 10 by an air preheater 3 and supplied to an air supply pipe 11 to a boiler 1. The oxides are removed and enter the air preheater 3 from the flue 4 where they exchange heat with air before being discharged from the chimney.
【０００８】ボイラ１からの３００度Ｃから４００度Ｃ
の熱排ガスは脱硝装置２上流側、もしくは下流側の煙道
４から抽出管１４を通って誘引ファン９で抽出され、蒸
発器７に導かれる。蒸発器７内では、還元剤水溶液供給
管６で導かれた水溶液還元剤を、脱硝に必要な量、霧状
にスプレイし、排ガスの熱量で還元剤水溶液は気化され
る。その後、気化された還元剤は、供給管１２を通り、
還元剤分配管寄せ８に送られ、排ガスに均一に混合させ
る。[0008] 300 to 400 degrees C from boiler 1
The hot exhaust gas is extracted from the flue 4 on the upstream side or the downstream side of the denitration device 2 through the extraction pipe 14 by the induction fan 9 and guided to the evaporator 7. In the evaporator 7, the aqueous solution reducing agent guided by the reducing agent aqueous solution supply pipe 6 is sprayed in an amount required for denitration in the form of mist, and the reducing agent aqueous solution is vaporized by the calorific value of the exhaust gas. Thereafter, the vaporized reducing agent passes through the supply pipe 12,
The reducing agent is sent to the pipe line 8 and uniformly mixed with the exhaust gas.
【０００９】このとき気化後の希釈還元剤温度は、プラ
ント燃料に硫黄分を含まない天然ガス等のボイラ燃焼排
ガスの抽出で、硝安を生成しない２００度Ｃの温度以上
になるよう、また、硫黄分を含む油等のボイラ燃焼排ガ
ス抽出で硫安を生成しない２５０度Ｃの温度以上になる
よう運用させる。これは、還元剤蒸発系統内にある流量
計エレメント、ダンパ、及び還元剤注入ノズル等に硝安
や硫安付着で作動不良を起こさないような温度である。At this time, the temperature of the diluted reducing agent after vaporization is set to a temperature of 200 ° C. or higher at which nitrate is not generated by extracting boiler combustion exhaust gas such as natural gas containing no sulfur in plant fuel. The operation is carried out at a temperature of 250 ° C. or higher at which ammonium sulfate is not generated by extracting boiler combustion exhaust gas such as oil containing oil. This is a temperature at which operation failure does not occur due to adhesion of ammonium nitrate or ammonium sulfate to the flow meter element, the damper, the reducing agent injection nozzle, etc. in the reducing agent evaporation system.
【００１０】さらに、本方式は、石炭焚きボイラ排ガス
など、高濃度の煤煙を含む排ガスを処理する脱硝装置に
適用するには、排ガス排出口にてダストを十分除去しな
い限り、ファン等の磨耗、ダストの蒸発器沈降があるた
め、実際的には適用不可能である。[0010] Further, in order to apply this method to a denitration apparatus for treating exhaust gas containing high-concentration soot, such as coal-fired boiler exhaust gas, unless the dust is sufficiently removed at an exhaust gas outlet, wear of a fan or the like may occur. Not practically applicable due to dust evaporator settling.
【００１１】図３は前述の（２）の方法を適用した還元
剤注入装置のシステム系統図である。このシステムで
は、符号１乃至４、６乃至８、１０乃至１２は前述の図
１と同じ構成であり、詳しい説明は省略するがこのよう
な脱硝装置において、大気を押し込みファン１０’で押
し込みし、電気加熱器１１で加熱し、配管１５を通して
蒸発器７へ供給する。蒸発器７では前述のように還元剤
が気化し、供給管１２により還元剤分配管寄せ８に供給
される。このとき、蒸発媒体が空気のため上述のような
還元剤と窒素酸化物の温度は１３０度Ｃ程度まで下げら
れる。しかしながら、電気加熱器１１で大気温度より、
還元剤蒸発器７入口温度３００度Ｃまで昇温する必要が
あるので、大きな電力を必要とし、プラント効率の低下
になっていた。FIG. 3 is a system diagram of a reducing agent injection device to which the above-mentioned method (2) is applied. In this system, reference numerals 1 to 4, 6 to 8, and 10 to 12 have the same configuration as that of FIG. 1 described above, and detailed description is omitted, but in such a denitration apparatus, the atmosphere is pushed in by a pushing fan 10 ′, The mixture is heated by the electric heater 11 and supplied to the evaporator 7 through the pipe 15. In the evaporator 7, the reducing agent is vaporized as described above, and supplied to the reducing agent distribution pipe shifter 8 through the supply pipe 12. At this time, since the evaporation medium is air, the temperature of the above-described reducing agent and nitrogen oxide is reduced to about 130 ° C. However, with the electric heater 11,
Since it is necessary to raise the temperature of the reducing agent evaporator 7 inlet to 300 ° C., a large amount of electric power is required and the plant efficiency is reduced.
【００１２】[0012]
【発明が解決しようとする課題】上述したような従来の
技術によるボイラプラントの触媒脱硝装置において還元
剤水溶液を蒸発し、注入する装置は、図２に示すボイラ
燃焼排ガス利用のシステムの場合、アンモニア化合物生
成防止のため必要抽出ガス量が大きくファン消費電力が
大きくなり、又、図３に示す大気加熱方式の場合、電気
加熱器電力消費が大きくなる問題があった。The apparatus for evaporating and injecting the aqueous solution of the reducing agent in the catalytic denitration apparatus of a boiler plant according to the prior art as described above is an ammonia-based system using boiler combustion exhaust gas as shown in FIG. In order to prevent the formation of compounds, the required amount of extracted gas is large and the power consumption of the fan is large. In the case of the air heating system shown in FIG. 3, there is a problem that the power consumption of the electric heater is large.
【００１３】[0013]
【課題を解決するための手段】本発明はこのような課題
を解決するために、ボイラ発電プラントに適用される脱
硝装置用還元剤注入装置において、脱硝用の還元剤とし
てアンモニア水を使用し、ボイラ発電プラントに設置の
空気予熱器出口の熱空気を還元剤水溶液蒸発に利用する
ものである。更に、還元剤として尿素水を使用する注入
装置も提供する。SUMMARY OF THE INVENTION In order to solve such problems, the present invention provides a reducing agent injection device for a denitration device applied to a boiler power plant, wherein ammonia water is used as a reducing agent for denitration. The hot air at the outlet of the air preheater installed in the boiler power plant is used for evaporating the reducing agent aqueous solution. Furthermore, an injection device using urea water as a reducing agent is provided.
【００１４】即ち、本発明は、（１）ボイラ排ガス煙道
に空気予熱器を設け、同ボイラに供給する空気を同排ガ
スで昇温するボイラ発電プラントに適用される脱硝装置
に脱硝用還元剤を注入する装置と、還元剤水溶液を加熱
源により蒸発させ、前記注入装置に供給する装置とより
なる脱硝装置用還元剤注入装置において、前記還元剤と
してアンモニア水を使用すると共に前記加熱源として前
記空気予熱器出口の熱空気を使用したことを特徴とする
脱硝装置用還元剤注入装置を提供する。That is, the present invention provides (1) an air preheater provided in a boiler exhaust gas flue, and a denitrifying device applied to a boiler power plant for raising the temperature of air supplied to the boiler by the exhaust gas. And a device for injecting a reducing agent aqueous solution by a heating source to evaporate a reducing agent aqueous solution by a heating source, and supplying the injection device with the reducing agent injection device, wherein ammonia water is used as the reducing agent and the heating source is Provided is a reducing agent injection device for a denitration device, wherein hot air at an outlet of an air preheater is used.
【００１５】（２）更に、前述の（１）の発明におい
て、前記還元剤として前記アンモニア水に代えて尿素水
を使用したことを特徴とする脱硝装置用還元剤注入装置
も提供する。(2) Further, in the invention of the above (1), there is also provided a reducing agent injection device for a denitration device, wherein urea water is used as the reducing agent instead of the ammonia water .
【００１６】本発明はこのような装置であるので、その
（１）の発明では、還元剤供給装置において還元剤水溶
液を加熱して蒸発させる。この加熱による蒸発はボイラ
発電プラントの空気予熱器出口からの熱空気を抽出、例
えば、２５０℃〜３００℃の熱空気を抽出し、蒸発器に
送り、この蒸発器に還元剤水溶液、即ち、アンモニア水
を導き、スプレイすることにより蒸発させて注入装置へ
送る。注入装置では、供給装置から気化したアンモニア
水を例えば、還元剤分配管寄せ、等により脱硝装置の入
口煙道内に注入し、排ガスと混合し、脱硝装置において
排ガス中から窒素酸化物を除去する。Since the present invention is such a device, in the invention of (1), the reducing agent aqueous solution is heated and evaporated in the reducing agent supply device. Evaporation by this heating extracts hot air from the air preheater outlet of the boiler power plant, for example, extracts hot air at 250 ° C. to 300 ° C. and sends it to the evaporator. The water is directed, evaporated by spraying and sent to the injection device. In the injection device, the ammonia water vaporized from the supply device is injected into the inlet flue of the denitration device by, for example, moving a reducing agent distribution pipe, etc., mixed with the exhaust gas, and the nitrogen oxide is removed from the exhaust gas in the denitration device.
【００１７】このような注入装置であれば、還元剤蒸発
媒体が空気のため、付着の原因になるアンモニア化合物
の生成が無く、また蒸発器出口希釈還元剤温度を例え
ば、１３０℃程度に低く設定できるため、従来の排ガス
を導入する方法、電気加熱による方法に較べ、通風機等
の動力が少くてすみ、少ない風量で効率的に還元剤水溶
液を蒸発できる。With such an injection device, since the reducing agent evaporating medium is air, there is no generation of an ammonia compound which causes adhesion, and the temperature of the diluent reducing agent at the evaporator outlet is set to, for example, as low as about 130 ° C. Therefore, as compared with the conventional method of introducing exhaust gas and the method of electric heating, the power of the ventilator and the like is small, and the reducing agent aqueous solution can be efficiently evaporated with a small air volume.
【００１８】（２）の発明では、還元剤として前記アン
モニア水に代えて従来用いていた尿素水を用いて、従来
よりも小さな動力で注入することができ、（１）と同様
の作用、効果を奏するものである。In the invention of (2), the above-mentioned amide is used as a reducing agent.
Using urea water, which has been used conventionally , instead of monia water, it can be injected with less power than before, and has the same action and effect as (1).
【００１９】[0019]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面に基づいて具体的に説明する。図１は本発明の実
施の一形態に係る脱硝装置用還元剤注入装置のシステム
系統図である。図において１はボイラ、２は脱硝装置、
３は空気予熱器、４は煙道、５は誘引通風器、６は還元
剤水溶液供給管、７は蒸発器、８は還元剤分配管寄せ、
９は還元剤タンクであり、アンモニア系の水溶液が入っ
ている。１０は押込み通風機、１１は空気供給管、１２
は還元剤供給管、１３は配管である。Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a system diagram of a reducing agent injection device for a denitration device according to an embodiment of the present invention. In the figure, 1 is a boiler, 2 is a denitration device,
3 is an air preheater, 4 is a flue, 5 is an induction ventilator, 6 is a reducing agent aqueous solution supply pipe, 7 is an evaporator, 8 is a reducing agent distribution pipe,
Reference numeral 9 denotes a reducing agent tank which contains an aqueous ammonia solution. 10 is a forced draft fan, 11 is an air supply pipe, 12
Is a reducing agent supply pipe, and 13 is a pipe.
【００２０】このような構成のシステムにおいて、脱硝
装置２は、ボイラ１からの排ガス中の窒素酸化物を取り
除く装置で、煙道４に組み込まれ、窒素酸化物を除去し
た後、空気予熱器３で熱交換し、煙突より排出される。
一方、ボイラ１へは押込み送風機１０からの空気が空気
予熱器３で排ガスの熱に昇温され、導入される。In the system having such a configuration, the denitration device 2 is a device for removing nitrogen oxides in the exhaust gas from the boiler 1 and is incorporated in the flue 4 to remove the nitrogen oxides. The heat is exchanged at the outlet and discharged from the chimney.
On the other hand, the air from the forced air blower 10 is heated to the heat of the exhaust gas by the air preheater 3 and introduced into the boiler 1.
【００２１】脱硝するための還元剤水溶液は、アンモニ
ア系の水溶液であり、アンモニア水や尿素水が用いら
れ、蒸発及び希釈するため空気予熱器３出口の誘因通風
機５で配管１３を通し、２５０℃〜３００℃の熱空気を
抽出し、蒸発器７に送る。一方、還元剤タンク９内の還
元剤水溶液は、還元剤水溶液供給管６を通じ蒸発器７内
でスプレイされる。ここで熱空気によって気化、希釈さ
れた還元剤は、還元剤供給管１２通り、約１３０℃とな
り還元剤分配管寄せ８を通じ煙道内に排ガスと均一に混
合させる。The aqueous solution of the reducing agent for denitration is an ammonia-based aqueous solution, and aqueous ammonia or urea water is used. Hot air at a temperature of from 300C to 300C is extracted and sent to the evaporator 7. On the other hand, the reducing agent aqueous solution in the reducing agent tank 9 is sprayed in the evaporator 7 through the reducing agent aqueous solution supply pipe 6. The reducing agent vaporized and diluted by the hot air reaches about 130 ° C. through the reducing agent supply pipe 12 and is uniformly mixed with the exhaust gas in the flue through the reducing agent distribution pipe shifter 8.
【００２２】このように本発明の実施の形態では、ボイ
ラ発電プラントから発生する窒素酸化物を低減する脱硝
装置の還元剤水溶液注入システムにおいて、ボイラプラ
ントの空気予熱器２出口空気をこの還元剤水溶液の蒸
発、かつ希釈媒体に使ったものである。As described above, in the embodiment of the present invention, in the reducing agent aqueous solution injection system of the denitration apparatus for reducing nitrogen oxides generated from the boiler power plant, the air at the outlet of the air preheater 2 of the boiler plant is supplied with the reducing agent aqueous solution. It was used for evaporation and dilution medium.
【００２３】前述のボイラプラントの脱硝装置用還元剤
注入装置によれば、例えば、１５０ＭＷ出力の油焚きボ
イラで、脱硝率９０％の脱硝装置に、濃度３０％のアン
モニア水を使用したと仮定する。図２に示すようにボイ
ラ排ガスを希釈媒体として使う場合、誘引ファン９が１
１５ＫＷの電力を必要とし、また、図３に示すように希
釈媒体として大気を使い電気加熱器１１を使用する場
合、押し込みファン１０’で５０ＫＷ、電気加熱器１１
で１，０５０ＫＷの電力が必要となる。一方、本実施の
形態を採用すると、誘引ファン５の８５ＫＷの電力消費
量のみですむ。According to the above-described reducing agent injection apparatus for a denitration apparatus of a boiler plant, it is assumed that, for example, in an oil-fired boiler having a 150 MW output, ammonia water having a concentration of 30% is used in a denitration apparatus having a denitration rate of 90%. . When the boiler exhaust gas is used as a diluting medium as shown in FIG.
When the electric heater 11 requires 15 KW of electric power and uses the air as the diluting medium as shown in FIG.
Requires 1,050 KW of power. On the other hand, when this embodiment is adopted, only the power consumption of the induction fan 5 of 85 KW is required.
【００２４】[0024]
【発明の効果】以上、具体的に説明したように、本発明
の脱硝装置用還元剤注入装置は要するに、ボイラ発電プ
ラントに適用される脱硝装置用還元剤注入装置におい
て、脱硝用の還元剤としてアンモニアを使用し、ボイラ
発電プラントに設置の空気予熱器出口の熱空気を還元剤
水溶液蒸発に利用することを特徴とし、更に、還元剤と
して尿素水を使用する注入装置も提供するので、従来よ
り用いられているアンモニア水や尿素水を使用して電気
加熱器を用いることなく、少ないファン消費電力ですむ
ものである。As described above in detail, the reducing agent injection device for a denitration device of the present invention is, in short, used as a reducing agent for denitration in a denitration device injection device applied to a boiler power plant. Using ammonia, hot air at the outlet of the air preheater installed in the boiler power plant is used for evaporating the reducing agent aqueous solution.Furthermore, an injection device using urea water as the reducing agent is also provided. A small fan power consumption can be achieved without using an electric heater by using the used ammonia water or urea water.
【図１】本発明の実施の一形態に係る脱硝装置用還元剤
注入装置のシステム系統図である。FIG. 1 is a system diagram of a reducing agent injection device for a denitration device according to an embodiment of the present invention.
【図２】従来の脱硝装置用還元剤注入装置のシステム系
統図で、ボイラ排ガスの熱を利用する例を示す。FIG. 2 is a system diagram of a conventional reducing agent injection device for a denitration device, showing an example in which heat of boiler exhaust gas is used.
【図３】従来の脱硝装置用還元剤注入装置のシステム系
統図で、電気加熱による例を示す。FIG. 3 is a system diagram of a conventional reducing agent injection device for a denitration device, showing an example of electric heating.
１ ボイラ ２ 脱硝装置 ３ 空気予熱器 ４ 煙道 ５ 誘引通風機 ６ 還元剤水溶液供給管 ７ 蒸発器 ８ 還元剤分配管寄せ ９ 還元剤タンク １０ 押込み送風機 １１ 空気供給管 １２ 還元剤供給管 １３ 配管 DESCRIPTION OF SYMBOLS 1 Boiler 2 Denitration apparatus 3 Air preheater 4 Flue 5 Induction ventilation 6 Reducing agent aqueous solution supply pipe 7 Evaporator 8 Reducing agent distribution piping 9 Reducing agent tank 10 Push-in blower 11 Air supply pipe 12 Reducing agent supply pipe 13 Pipe
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−154552（ＪＰ，Ａ) 特開 昭54−22010（ＪＰ，Ａ) 特開 平５−57146（ＪＰ，Ａ) 実開 平１−69627（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/86 B01D 53/56 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-154552 (JP, A) JP-A-54-22010 (JP, A) JP-A-5-57146 (JP, A) 69627 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) B01D 53/86 B01D 53/56
Claims (2)
同ボイラに供給する空気を同排ガスで昇温するボイラ発
電プラントに適用される脱硝装置に脱硝用還元剤を注入
する装置と、還元剤水溶液を加熱源により蒸発させ、前
記注入装置に供給する装置とよりなる脱硝装置用還元剤
注入装置において、前記還元剤としてアンモニア水を使
用すると共に前記加熱源として前記空気予熱器出口の熱
空気を使用したことを特徴とする脱硝装置用還元剤注入
装置。1. An air preheater is provided in a boiler exhaust gas flue,
A device that injects a denitration reducing agent into a denitration device applied to a boiler power plant that raises the temperature of air supplied to the boiler with the same exhaust gas, and a device that evaporates a reducing agent aqueous solution by a heating source and supplies it to the injection device Wherein the ammonia water is used as the reducing agent and hot air at the outlet of the air preheater is used as the heating source.
えて尿素水を使用したことを特徴とする請求項１記載の
脱硝装置用還元剤注入装置。2. The method according to claim 1, wherein said reducing agent is replaced by said ammonia water.
2. The reducing agent injection device for a denitration device according to claim 1, wherein urea water is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19848895A JP3354756B2 (en) | 1995-08-03 | 1995-08-03 | Reducing agent injection device for denitration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19848895A JP3354756B2 (en) | 1995-08-03 | 1995-08-03 | Reducing agent injection device for denitration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0938466A JPH0938466A (en) | 1997-02-10 |
| JP3354756B2 true JP3354756B2 (en) | 2002-12-09 |
Family
ID=16391957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19848895A Expired - Lifetime JP3354756B2 (en) | 1995-08-03 | 1995-08-03 | Reducing agent injection device for denitration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3354756B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001241603A (en) * | 2000-02-28 | 2001-09-07 | Miura Co Ltd | Denitration device for boiler |
| US7722844B2 (en) | 2004-12-10 | 2010-05-25 | Babcock-Hitachi Kabushiki Kaisha | Exhaust smoke denitrating apparatus and method of exhaust smoke denitration |
| JP2010249407A (en) * | 2009-04-15 | 2010-11-04 | Mitsubishi Heavy Ind Ltd | Coal burning boiler and plant equipped with the same |
| CN107158948A (en) * | 2017-06-12 | 2017-09-15 | 盐城诚达环保工程有限公司 | Denitrification reducing agent gas ammonia is produced and denitrating flue gas integrated apparatus |
| CN110170248A (en) * | 2019-02-02 | 2019-08-27 | 昆山市三维换热器有限公司 | Natural wind heats denitrating system |
| JP2022129105A (en) | 2021-02-24 | 2022-09-05 | 三菱重工業株式会社 | Heat exchange piping constitution for ammonia vaporization in denitrification apparatus |
-
1995
- 1995-08-03 JP JP19848895A patent/JP3354756B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0938466A (en) | 1997-02-10 |
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