JPS5980318A - Reduction of nitrogen oxide in exhaust gas of urban garbage incinerator - Google Patents
Reduction of nitrogen oxide in exhaust gas of urban garbage incineratorInfo
- Publication number
- JPS5980318A JPS5980318A JP57189762A JP18976282A JPS5980318A JP S5980318 A JPS5980318 A JP S5980318A JP 57189762 A JP57189762 A JP 57189762A JP 18976282 A JP18976282 A JP 18976282A JP S5980318 A JPS5980318 A JP S5980318A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite particles
- exhaust gas
- iron
- added
- combustion chamber
- 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
- Incineration Of Waste (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
＋発明はｆｒ＋’、市ゴミ、産業廃棄物などの塵芥焼却
炉かＬ’） ｖ月１１ガス中に含まれる窒素ず１幇化物
を低減除去する方法の改良（こ関する。[Detailed description of the invention] +The invention is an improvement in the method for reducing and removing nitrogen and chlorides contained in fr+', municipal waste, industrial waste, etc. related.
！１１５市ゴミまたは廃プラスチックス、廃油などの用
添・１４４を含む１４／＜業廃棄物を焼却処理する場合
、そのム゛６却炉から排出される排ガス中には、硫黄酸
化物、窒素ｒ１電化物、１盆化水素など種々の有害ガス
が含まれＣいる。この種の排ガスはｊｌＪｊ常水あるい
はアルカリ水溶液で洗浄されＣから人気中に排出されて
いるが、これらのうち窒素酸化物は１１１１記洗浄液の
みによっ−〔は吸収され峠＜、また一方ではこの窒素酸
化物が光化学スモッグの発生原因物質の一つであるため
その徹底した１崎去が望まれ〔いる。! 115 When incinerating industrial waste containing 115 city garbage, waste plastics, waste oil, etc., sulfur oxides and nitrogen r1 are emitted from the incinerator. It contains various harmful gases such as electrified substances and hydrogen. This kind of exhaust gas is washed with ordinary water or an alkaline aqueous solution and discharged from C, but of these, nitrogen oxides are absorbed only by the cleaning solution mentioned in 1111, and on the other hand, this Since nitrogen oxides are one of the substances that cause photochemical smog, it is desirable to completely eliminate them.
窒素酸化物を含む混合ガスから窒素酸化物を除去する方
法は従来より数多く提案されＣおり、乾式の方法として
は、燃焼炉で廃棄物を燃焼させた後の排ガスにアンモニ
アを添加し′Ｃ窒素酸化物を還元す、る方法があるが、
この方法では窒素酸化物の除去率が高々ｌＯ〜２０％程
度である。また別の方法として燃焼後の排ガスを、触媒
を充填した固定床に通し・Ｃ窒素酸化物をｊＷ元する方
法も提案されているが、都市ゴミ焼却炉排ガス中には塩
化水素ガスが含まれており、このガスによる触媒の汚染
がひどく、短期間の使用で活性が低トするので有利な方
法とはいえない。Many methods have been proposed in the past for removing nitrogen oxides from mixed gases containing nitrogen oxides, and a dry method involves adding ammonia to the exhaust gas after burning waste in a combustion furnace. There is a method to reduce oxides, but
In this method, the removal rate of nitrogen oxides is about 10 to 20% at most. Another method has been proposed in which the exhaust gas after combustion is passed through a fixed bed packed with a catalyst to convert nitrogen oxides into nitrogen oxides, but the exhaust gas from municipal waste incinerators contains hydrogen chloride gas. This is not an advantageous method because the catalyst is severely contaminated by this gas and its activity decreases after short-term use.
本発明者は上述の欠点を排除し、比較的高い酸素含有量
を有する都市ゴミ焼）４１炉の排ガスに適用イトネ１”
ｒｆを送入するか又はさらに燃焼室にアンモニアを添ｖ
ＩＩ ｆれば効率よく窒素酸化物を低減できることを’
ＬＩＩり本発明に到達した。The inventor has eliminated the above-mentioned drawbacks and applied it to the exhaust gas of municipal garbage incineration) 41 furnaces with a relatively high oxygen content.
rf or even add ammonia to the combustion chamber.
II f can efficiently reduce nitrogen oxides.
LII arrived at the present invention.
すなわち本発明の要旨は、都市ゴミ焼却炉の燃焼室にフ
ェライト粒子を送入することを特徴とするものであり、
さらに燃焼室にアンモニアを添加することを特徴とする
都市ゴミ焼却炉排ガス中の窒素１竣化物の低減方法であ
る。That is, the gist of the present invention is characterized by feeding ferrite particles into the combustion chamber of a municipal waste incinerator.
This method further comprises adding ammonia to the combustion chamber for reducing nitrogen 1 products in exhaust gas from a municipal waste incinerator.
本発明で使用するフェライト粒子は例えばＦｅ５ｏＩで
示される亜鉄酸塩であり、ｌΦ３０４のＦｅの一部が粒
径は数十ミリミクロン−赦百ミリミクロンのものが好適
（５使用できる。添加垣はゴミ１０００ｋｇ当り（）、
１〜１ｋｇの１改が虐しくおり、これ以１：の喰では窒
素酸化物１１（減の効果がなく、これ以上添加しＣも除
去’Ｊ果Ｇこ変りがないので不経済である。The ferrite particles used in the present invention are, for example, ferrite represented by Fe5oI, and it is preferable that a part of Fe of lΦ304 has a particle size of several tens of millimicrons to hundreds of millimicrons (5 can be used. is per 1000 kg of garbage (),
1 to 1 kg of 1st grade is atrocious, and eating 1:1 after this has no effect on reducing nitrogen oxides 11 (11), and adding any more is uneconomical since there is no change in the amount of C removed.
添加する形状は特に限定されることはないが、粉状体の
まま添１ｍあるいはスラリー状で噴霧添加するなどの方
法を適宜採用１ればよい。また添加方法としてゴミに所
定喰のフェライト粒子を直接混合し゛〔燃焼室に送入し
°〔も本発明の効果を奏する。There are no particular limitations on the form in which it is added, but a method such as adding it as a powder for 1 m or adding it in a slurry form by spraying may be adopted as appropriate. Furthermore, the effects of the present invention can also be achieved by directly mixing a predetermined amount of ferrite particles with dust and feeding it into the combustion chamber.
アンモニアの添加はガス状、液状のいづれでも添加する
ことができる。Ammonia can be added in either gaseous or liquid form.
本発明でフェライト粒子を燃焼室に送入して窒素酸化物
を低減１゛ることができる＋４１％４１′ｔは十分詳ら
かではないが、燃焼室における９００℃〜ｔｏｏｎ”ｃ
の高温条件下、フェライト粒子すなわち、鉄が部分的に
酸化された化合物の残還元力が排ガス中の窒素酸化物を
還元”Ｖるのに好適１′ｌ：を発揮するものと思われる
。Although it is not fully clear that nitrogen oxides can be reduced by +41%41't by introducing ferrite particles into the combustion chamber in the present invention,
It is believed that the residual reducing power of the ferrite particles, that is, the compound in which iron is partially oxidized, exhibits a suitable level of reduction of nitrogen oxides in the exhaust gas under high temperature conditions.
次に本発明を実施例により説明する。Next, the present invention will be explained by examples.
実施例１
都市ゴミ１５０Ｔ／ｌ）を処理する都市ゴミ焼却炉かう
５００００ Ｎｒｒｌ／Ｈの燃焼ガスが排出され、その
中に窒素酸化物が１５０ ｐｐｍ含まれ°〔いる。Example 1 A municipal waste incinerator that processes municipal waste (150 T/l) emits combustion gas of 50,000 Nrrl/H, which contains 150 ppm of nitrogen oxides.
この焼却炉の燃焼室に時＋１ｆｌ当りｔＬ８ｋｇのフェ
８８ ｐｐｎｔに減少した。In the combustion chamber of this incinerator, 8 kg of tL/fl per hour was reduced to 88 ppnt.
実施例
実施１；・；ｊ目こおい°Ｃ１時間当りのフェライト粉
末（Ｆｅ３す４９０％、 ＭｎＱ、５ Ｚｎ□、５ Ｆ
ｅ＋０４１０％）を４ＪｋｇとＬｌさらに燃焼室に時間
当り３ｋｇのアンモニアカスを添加したところ窒素酸化
物の含有量が４９ｐｐｍ ＆こ減少した。Example Example 1 Ferrite powder (Fe3 490%, MnQ, 5 Zn□, 5 F
When 4Jkg and Ll of (e+0410%) and 3kg of ammonia scum per hour were added to the combustion chamber, the nitrogen oxide content decreased by 49ppm.
出願人 製鉄化学、ｒ： 、＠株式会社代表者 佐々木
浩
手続補正書（方式す
１１１（和５８年ｊ月１０（１
１、事件の表示 昭和５７年特許願第１８９７６２号
３、補正をする者
事件との関係 特許出願人
郵便１１１号 ６７５−Ｏｆ
５、補正の対象 願書及び明細ｌＦApplicant: Iron and Steel Chemical Co., Ltd., R: , @ Co., Ltd. Representative: Hiroshi Sasaki Procedural Amendment (Formula 111) (January 10, 1982 (1 1) Case Description 1989 Patent Application No. 189762 3, Person Making the Amendment Relationship to the case Patent Applicant Mail No. 111 675-Of 5, Subject of amendment Application and specification 1F
Claims (1)
送入することを特徴とする都市ゴミ焼却炉排ガス中の窒
素酸化物の低減方法。 （２） フェライト粒子がＦｅ ３０４である特許請求
の＋１ｉｉ）囲（１）記載の方法。 （３） フェライト粒子の主成分がＦｅ５ｓ４であり、
・ｔの他の少１１起成分が一般式ＡＢ ２０４で表示さ
れ、ＡがＦｅ ２４でル】すＢが鉄以外の１【位属であ
る待訂賄求の範囲（１）記載の方法。 がＦｅ３＋であり、Ａが鉄以外の１に金属である特許請
求の範囲（１）記載の方法。 （５） フェライト粒子の主成分がＦｅａｒ４であり
、＝←）池の少噴成分が一般式ＡＢ２０４ Ａされ、Ａ
の一部がＦｅ２＋でかっＢの一部がＦｅ３＋であり、Ａ
およびＢの他の部分が鉄以外の爪金ｋＡである特＾′「
請求の範ｌＪ旧１）記載の方法。 （６） フェライト粒子を粉末状で添加する特許請求
の範囲（１）記載の方法。 （７） フェライト粒子をスラリー状で添加する１、
Ｙ訂Ｗｌｌ？求の範囲（１）記載の方法。 （８） 都市ゴミ焼却炉の燃焼室（こフェライト粒子
を送入するとともに燃焼室にアンモニアも添加すること
を特徴とする都市ゴミ焼却炉排ガス中の窒素酸化物の低
減方法。 （９） フェライト粒子がＦｅ ３０４である特許請
求の範囲（８）記載の方法。 （１０）フェライト粒子の主成分がＦｅ３Ｏ４であり、
その他の少）３に成分が一般式ＡＢ２０４で表示され、
ＡがＦｅ２＋でありＢが鉄以外の重金属である特許請求
の範囲（８）記載の方法。 がＦｅ３＋であり、Ａが鉄以外の１【金属である特許請
求の範囲（８）記載の方法。 ｉｌｌがｌｉ’ ｅ ”十でかつＢの一部がＦｅ３”テ
；ｈ ’）、ＡｇよびＢの他の部分が鉄以外の重金属で
ある特許請求の範囲（８）記載の方法。 （１８）フェライト粒子を粉末状で添加する４’Ｖ許請
求の範囲（８）記載の方法。 （１４，） フェライト粒子をスラリー状で添加する
特許請求の範囲（８） ｇＬ！桟の方法。[Claims] (1) A method for reducing nitrogen oxides in exhaust gas from a municipal waste incinerator, which comprises feeding ferrite particles into the incineration chamber of the municipal waste incinerator. (2) The method according to claim +1ii) (1), wherein the ferrite particles are Fe 304. (3) The main component of the ferrite particles is Fe5s4,
- The method according to (1), in which the other minor element of t is represented by the general formula AB 204, A is Fe 24, and B is 1 other than iron. The method according to claim (1), wherein is Fe3+ and A is a metal other than iron. (5) The main component of the ferrite particles is Fear4, =←) The small jet component of the pond is expressed by the general formula AB204 A, and A
Part of B is Fe2+, part of B is Fe3+, and A
And the other part of B is a nail metal kA other than iron.
The method described in Claims 1J Old 1). (6) The method according to claim (1), wherein ferrite particles are added in powder form. (7) Adding ferrite particles in slurry form 1.
Y-editedWll? The method described in scope of request (1). (8) A method for reducing nitrogen oxides in exhaust gas from a municipal waste incinerator, characterized by feeding ferrite particles into the combustion chamber of the municipal waste incinerator and also adding ammonia to the combustion chamber. (9) Ferrite particles is Fe 304. (10) The main component of the ferrite particles is Fe3O4,
Other components in 3 are represented by the general formula AB204,
The method according to claim (8), wherein A is Fe2+ and B is a heavy metal other than iron. The method according to claim (8), wherein is Fe3+ and A is a metal other than iron. 8. The method according to claim 8, wherein ill is li' e '', a portion of B is Fe3''), and the other portions of Ag and B are heavy metals other than iron. (18) The method according to claim (8), wherein ferrite particles are added in powder form. (14,) Claim (8) gL! in which ferrite particles are added in a slurry form. Crosspiece method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57189762A JPS5980318A (en) | 1982-10-27 | 1982-10-27 | Reduction of nitrogen oxide in exhaust gas of urban garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57189762A JPS5980318A (en) | 1982-10-27 | 1982-10-27 | Reduction of nitrogen oxide in exhaust gas of urban garbage incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5980318A true JPS5980318A (en) | 1984-05-09 |
Family
ID=16246749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57189762A Pending JPS5980318A (en) | 1982-10-27 | 1982-10-27 | Reduction of nitrogen oxide in exhaust gas of urban garbage incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5980318A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323647A1 (en) * | 1993-07-15 | 1995-01-19 | Schramberg Magnetfab | Apparatus and granular material for purifying process exhaust gases in the dry method |
| EP3017859A1 (en) * | 2014-11-10 | 2016-05-11 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purifying catalyst for selective reduction of nox and exhaust gas purifying method |
| JP2019128040A (en) * | 2018-01-19 | 2019-08-01 | 川崎重工業株式会社 | Waste incinerator |
-
1982
- 1982-10-27 JP JP57189762A patent/JPS5980318A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323647A1 (en) * | 1993-07-15 | 1995-01-19 | Schramberg Magnetfab | Apparatus and granular material for purifying process exhaust gases in the dry method |
| EP3017859A1 (en) * | 2014-11-10 | 2016-05-11 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purifying catalyst for selective reduction of nox and exhaust gas purifying method |
| CN105582955A (en) * | 2014-11-10 | 2016-05-18 | 丰田自动车株式会社 | Exhaust Gas Purifying Catalyst For Selective Reduction Of Nox And Exhaust Gas Purifying Method |
| JP2016087587A (en) * | 2014-11-10 | 2016-05-23 | トヨタ自動車株式会社 | EXHAUST GAS PURIFYING CATALYST FOR NOx SELECTIVE REDUCTION AND EXHAUST GAS PURIFYING METHOD |
| JP2019128040A (en) * | 2018-01-19 | 2019-08-01 | 川崎重工業株式会社 | Waste incinerator |
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