JPS6168129A - Method for denitrating waste gas from cement kiln - Google Patents
Method for denitrating waste gas from cement kilnInfo
- Publication number
- JPS6168129A JPS6168129A JP59189316A JP18931684A JPS6168129A JP S6168129 A JPS6168129 A JP S6168129A JP 59189316 A JP59189316 A JP 59189316A JP 18931684 A JP18931684 A JP 18931684A JP S6168129 A JPS6168129 A JP S6168129A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- denitrification
- denitration
- calcining
- raw material
- 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.)
- Granted
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、仮焼炉付サスペンションプレヒータ、焼成炉
、クリンカー冷却機などによりセメント原料粉末を焼成
する装置において、焼成炉で発生したＮＯｘ （窒素酸
化物）含有焼成炉排ガスを脱硝する方法の改良に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an apparatus for firing cement raw material powder using a suspension preheater with a calcining furnace, a calcining furnace, a clinker cooler, etc. This invention relates to an improvement in the method of denitrifying nitrification.
従来のこの種技術は焼成炉と仮焼炉の間に脱硝炉を配置
し焼成炉からの排ガスを脱硝炉内に導くと共に、脱硝炉
に設けたバーナーにより脱硝炉内に燃料を供給して該炉
内に還元性ガス雰囲気を形成し、−力板焼炉に接続する
分離サイクロンより一段上のサイクロンからの予熱原料
粉末を脱燐炉内に導入し、これを触媒として焼成炉排ガ
スの脱硝を行なおうとするものである。尚、上記還元性
ガス雰囲気は、脱硝炉内の燃料燃焼域に部分的に形成さ
れる場合と、脱硝炉内のほぼ全域に形成する場合とがあ
る。This type of conventional technology places a denitrification furnace between the firing furnace and the calcining furnace, guides the exhaust gas from the firing furnace into the denitrification furnace, and supplies fuel into the denitrification furnace with a burner installed in the denitration furnace. A reducing gas atmosphere is formed in the furnace, and the preheated raw material powder from the cyclone one stage higher than the separation cyclone connected to the power plate furnace is introduced into the dephosphorization furnace, and this is used as a catalyst to denitrify the furnace exhaust gas. That's what I'm trying to do. Note that the above-mentioned reducing gas atmosphere may be formed partially in the fuel combustion area within the denitrification furnace, or may be formed over almost the entire area within the denitration furnace.
しかしこれら従来技術において、分離サイクロンより一
段上のサイクロンから触媒として脱硝炉に導入する予熱
原料粉末は、ＣａＣＯ３を主成分とする未だ仮焼前の原
料であって触媒活性が比較的低く、シかも処理すべき焼
成炉排ガスに比べて触媒としての予熱原料粉末が量的に
僅少であるため、触媒効果が少なく従って充分な脱硝効
果が得られていない。本発明はこれら実情に鑑み、触媒
活性のより高いＣａＯを主成分とする分離サイクロンか
らの仮焼原料粉末を、しかも充分な濃度となるよう脱硝
炉内の排ガス中に導入することにより触媒効果を、Ｗｌ
め、亮元性ガス雰囲気のドで焼成炉排カスを高度に脱硝
する技術を提供するものであって、その特徴とするとこ
ろは、焼成炉と仮焼炉との間に脱硝炉を配置して焼成炉
からの排ガスを脱硝炉に導入し、又仮焼炉から排出され
る仮焼原お粉末の少なくとも一部を脱硝炉に循環供給す
ると共に、脱硝炉に燃料を供給して酬元性ガス雰囲気を
形成し、当該脱硝炉内において、前記仮焼原料粉末を触
媒として焼成炉からの排ガス中に含まれる窒素酸化物の
二元を行わしめるところにある。以下実施例を示す図面
に基ついて本発明の構成及び作用効果を具体的に説明す
るが、ｒ記は単に代表例を基にして述べるに過ぎないか
ら、前・後記の趣旨に沿って変更実施することはいずれ
も本発明の技術的範囲に属する。However, in these conventional technologies, the preheated raw material powder that is introduced into the denitrification furnace as a catalyst from the cyclone one step above the separation cyclone is a raw material whose main component is CaCO3 and which has not yet been calcined, so the catalytic activity is relatively low, and there is a risk of Since the preheated raw material powder serving as a catalyst is small in quantity compared to the firing furnace exhaust gas to be treated, the catalytic effect is small and therefore a sufficient denitrification effect cannot be obtained. In view of these circumstances, the present invention improves the catalytic effect by introducing the calcining raw material powder from the separation cyclone, which mainly contains CaO, which has higher catalytic activity, into the exhaust gas in the denitrification furnace at a sufficient concentration. ,Wl
This technology provides a technology for highly denitrifying the firing furnace waste in a highly oxidizing gas atmosphere. The exhaust gas from the calcining furnace is introduced into the denitrification furnace, and at least a part of the calcined raw powder discharged from the calciner is circulated and supplied to the denitrification furnace, and fuel is supplied to the denitrification furnace to improve the fuel efficiency. A gas atmosphere is formed, and in the denitrification furnace, nitrogen oxides contained in the exhaust gas from the calcining furnace are converted into two by using the calcining raw material powder as a catalyst. The configuration and effects of the present invention will be specifically explained below based on the drawings showing the embodiments, but since the description is merely based on representative examples, modifications may be made in accordance with the spirit of the preceding and following. Anything that is done falls within the technical scope of the present invention.
図面は本発明による脱硝方法を実施するためのセメント
焼成装置全体のフローシートであり、図中の実線矢印は
ガスの流れ、破線矢印は原料の流れを示す。装置の概要
はサスペンションプレヒータｌ、仮焼炉２．脱硝炉３、
ロータリキルン等の焼成炉４、及びクリンカー冷却機５
からなり、原料投入シュート６から装入されたセメント
原料粉末はサスペンションプレヒータ１の第１段サイク
ロンＣ１，第２段サイクロンＣ２，第３段サイクロンＣ
３を通過し、この間所望の温度まで予熱される。他方こ
の予熱のために上昇する排ガスは分離サイクロンＣ４か
ら順次第３段、第２段及び第１段の各サイクロンを原料
粉末と逆方向に経由して通過し、最後に排ガス誘引通風
機７により吸引排出される。予熱原料粉末は第３段サイ
クロンＣ３からシュートを通して仮焼炉２へ導入され。The drawing is a flow sheet of the entire cement firing apparatus for carrying out the denitrification method according to the present invention, in which solid arrows indicate the flow of gas and dashed arrows indicate the flow of raw materials. The outline of the equipment is a suspension preheater 1, a calcining furnace 2. Denitrification furnace 3,
A firing furnace 4 such as a rotary kiln, and a clinker cooler 5
The cement raw material powder charged from the raw material input chute 6 is passed through the first stage cyclone C1, the second stage cyclone C2, and the third stage cyclone C of the suspension preheater 1.
3, during which it is preheated to the desired temperature. On the other hand, the exhaust gas rising for this preheating passes from the separation cyclone C4 through the 3rd stage, 2nd stage, and 1st stage cyclones in the opposite direction to the raw material powder, and is finally passed through the exhaust gas induced draft fan 7. It is sucked out. The preheated raw material powder is introduced into the calciner 2 from the third stage cyclone C3 through the chute.
クリンカー冷却機５より抽気ダクト８を通して誘引され
る高温空気を燃焼用空気として、仮焼炉２に付属のバー
ナ９より供給される燃料及び脱硝炉３より誘引される燃
焼ガスにより仮焼炉２内で仮焼された原料粉末は仮焼炉
２に接続する分離サイクロンＣ４に導入される。脱硝炉
３は仮焼炉２と焼成炉４との間に位置し、その下部は焼
成炉４の原料入口端に、また−Ｅ部は仮焼炉２にそれぞ
れ開口・接続し、側壁にバーナ１０を備えている。High-temperature air drawn from the clinker cooler 5 through the bleed air duct 8 is used as combustion air, and fuel supplied from the burner 9 attached to the calciner 2 and combustion gas induced from the denitrification furnace 3 are used inside the calciner 2. The raw material powder calcined in is introduced into a separation cyclone C4 connected to the calcining furnace 2. The denitration furnace 3 is located between the calcining furnace 2 and the calcining furnace 4, its lower part is opened and connected to the raw material inlet end of the calcining furnace 4, and the -E part is opened and connected to the calcining furnace 2, and a burner is installed on the side wall. It is equipped with 10.
焼成炉４の原料出口端に設置したバーナ１１により生成
された燃焼ガスは焼成炉４内を流過し。Combustion gas generated by the burner 11 installed at the raw material outlet end of the firing furnace 4 flows through the inside of the firing furnace 4 .
原料入口端より脱硝炉３に誘引されるがこの焼成炉排ガ
ス中には焼成炉４内での燃焼時に発生する多量のＮＯｘ
か含有される。A large amount of NOx generated during combustion in the firing furnace 4 is attracted into the denitrification furnace 3 from the raw material inlet end, but the exhaust gas from this firing furnace contains a large amount of NOx, which is generated during combustion in the firing furnace 4.
Contains.
脱硝炉３内には焼成炉排ガスとバーナｌＯから供給され
る燃料により還元性ガス雰囲気が形成され、加えて分離
サクロンＣ４からシュー）１２を通して供給される仮焼
原料粉末は有効な脱硝触媒として作用するため、焼成炉
４の排ガスに含有されるＮＯｘは脱硝炉３内で効果的に
還元される。A reducing gas atmosphere is formed in the denitrification furnace 3 by the firing furnace exhaust gas and the fuel supplied from the burner IO, and in addition, the calcining raw material powder supplied from the separation cyclone C4 through the shoe 12 acts as an effective denitrification catalyst. Therefore, NOx contained in the exhaust gas of the firing furnace 4 is effectively reduced within the denitrification furnace 3.
この際、分離サイクロンＣ４から脱硝炉３に供給する原
料粉末は既に大部分が仮焼されていてＣａＯが主成分で
あるためＣａＣＯ３を主成分とする予熱原料に較べて脱
硝時の触媒活性が遥かに高い。又、分離サイクロンＣ４
からシュート１２を通して脱硝炉３に供給した原よ′１
粉末は排カスと共に仮焼炉２を通して分離サイクロンＣ
ｔに循環士不ため 分難サイクロンＣ，１カ）らシ、−
ト１２を通して脱硝炉３に排出する原料粉末とシュート
１３を通して焼成炉４に排出する原料粉末との量的比率
を制御することにより、脱硝炉３内の原料粉末濃度を広
範囲に調節することができ、焼成炉排ガスの脱硝に適し
た触媒濃度を維持することができる。At this time, most of the raw material powder supplied from the separation cyclone C4 to the denitrification furnace 3 has already been calcined and contains CaO as the main component, so the catalytic activity during denitrification is far greater than that of the preheated raw material whose main component is CaCO3. expensive. Also, separation cyclone C4
The raw material supplied to the denitrification furnace 3 through the chute 12'1
The powder passes through the calcining furnace 2 together with the waste waste into the separation cyclone C.
Cyclone C, 1) Rashi, -
By controlling the quantitative ratio of the raw material powder discharged into the denitrification furnace 3 through the chute 12 and the raw material powder discharged into the firing furnace 4 through the chute 13, the raw material powder concentration in the denitrification furnace 3 can be adjusted over a wide range. , it is possible to maintain a catalyst concentration suitable for denitrification of firing furnace exhaust gas.
尚、分離サイクロンＣ４からシュート１３を通して焼成
炉４に排出された仮焼原料粉末は焼成炉４内で常法に従
って焼成され、タリン力−となってクリンカー冷却機５
で冷却された後次工程へ移送される。Incidentally, the calcining raw material powder discharged from the separation cyclone C4 through the chute 13 to the kiln 4 is fired in the kiln 4 according to a conventional method, and becomes a talin force to be fed to the clinker cooler 5.
After being cooled, it is transferred to the next process.
以上の如く、焼成炉４内で発生したＮＯｘは脱硝炉３内
で効果的に且つ高度に還元され、又仮焼゛ 炉２におい
ては周知の如く低温燃焼であるためＮＯｘを殆んど発生
しないので、本発明の脱硝手段を組み込んだセメント焼
成装置から排出されるＮＯｘは著しく低減される。−ヒ
記は実施の一例に渦きす、サスペンションプレヒータの
サイクロン段数を増減させたり、焼成炉として流動焙焼
炉を使用することは勿論のこと、仮焼炉、脱硝炉及び焼
成炉の構造、及び仮焼原料の循環−Ｆ段を適宜変更゛実
施することも本発明の実施範囲に含まれる。As described above, NOx generated in the calcining furnace 4 is effectively and highly reduced in the denitrification furnace 3, and in the calcining furnace 2, almost no NOx is generated due to low-temperature combustion as is well known. Therefore, NOx discharged from a cement firing apparatus incorporating the denitrification means of the present invention is significantly reduced. - This note is an example of the implementation of a whirlpool, increasing or decreasing the number of cyclone stages of a suspension preheater, using a fluidized roasting furnace as a firing furnace, as well as the structure of a calcining furnace, denitrification furnace, and firing furnace, and It is also within the scope of the present invention to appropriately change the circulation-F stage of the calcined raw material.
例えば仮焼炉と脱硝炉とを連接一本化した構造、第３段
サイクロンＣ３からの予熱原料粉末を仮焼炉２に供給す
る替りに、その一部又は全量を脱硝炉３に供給すること
により、更に脱硝効果の改善を計るとＩ′ｉ７Ｉ詩に脱
硝炉内でも仮焼反応を促進させるシュート配置、分離サ
イクロンＣ７Ｌを２基で構成し、一方のサイクロンシュ
ートを脱硝炉３に接続し、他方のサイクロンシュートを
焼成炉４の人目端に接続する構造、分離サイクロンＣ４
からの仮焼原料粉末を全量脱硝炉３に供給して、脱硝炉
３を向流型熱交換器として利用し、焼成炉４へは焼成炉
排ガスに抗して脱硝炉３の下部より原料を落石供給する
構造、脱硝炉３にアンモニア等の還元ガス吹込設備を設
けること等は本発明の変更実施例として挙げることがで
きる。本発明は以上の様に構成されており、付帯的効果
を含めてその効果を要約すると下記の通りである。For example, a structure in which a calcination furnace and a denitrification furnace are connected and integrated, and instead of supplying the preheated raw material powder from the third stage cyclone C3 to the calcination furnace 2, a part or all of it may be supplied to the denitrification furnace 3. Therefore, in order to further improve the denitrification effect, I'i7I installed a chute to promote the calcining reaction even within the denitrification furnace, and configured two separation cyclones C7L, one of which was connected to the denitrification furnace 3. A structure in which the other cyclone chute is connected to the end of the firing furnace 4, a separation cyclone C4
The entire amount of calcined raw material powder is supplied to the denitrification furnace 3, and the denitrification furnace 3 is used as a countercurrent heat exchanger, and the raw material is fed into the firing furnace 4 from the lower part of the denitration furnace 3 against the firing furnace exhaust gas A structure for supplying falling rocks, provision of equipment for blowing reducing gas such as ammonia into the denitrification furnace 3, etc. can be cited as modified embodiments of the present invention. The present invention is constructed as described above, and its effects including additional effects are summarized as follows.
（１）焼成炉排ガス中のＮｏｘｔ−ｉ元性ガス雰囲気の
下で、かつ触媒活性の高い仮焼原料粉末の存在下で、高
度に脱硝・除去できる。(1) Denitrification and removal can be achieved to a high degree under the Noxt-i elemental gas atmosphere in the firing furnace exhaust gas and in the presence of the calcining raw material powder with high catalytic activity.
（２）、脱硝炉への仮焼原料粉末供給量をＡ整すること
により、常に最適の脱硝状況を維持できる。(2) By adjusting the amount of calcining raw material powder supplied to the denitrification furnace at A, the optimal denitrification situation can be maintained at all times.
（３）脱硝炉で生成する還元性ガスはそのまま仮焼炉へ
導入しても完全燃焼させることができる。(3) The reducing gas generated in the denitrification furnace can be completely combusted even if it is directly introduced into the calciner.
（４）Ｂ７８粉末が仮焼城で高温カスに曝されている時
間が長くなり、原料の仮焼を促進できる。(4) The time during which the B78 powder is exposed to the high-temperature scum in the calcination castle becomes longer, and the calcination of the raw material can be accelerated.
（５）仮焼炉内の原料粉末濃度が高くなり、仮焼炉への
供給燃料の燃焼性が向上する。(5) The raw material powder concentration in the calciner increases, and the combustibility of the fuel supplied to the calciner improves.
図面は本発明による脱硝方法を実施するためのセメント
焼成装置全体のフローシートである。
■・・・サスペンションブレヒータ
２・・・仮焼炉 ３・・・脱硝炉４・・・焼成
炉 ５・・・タリンカー冷却機８・・・抽気ダ
クト ９・・・仮焼炉バーナ１０・・・脱硝炉バー
ナ １１・・・焼成炉へ−す昭ｆｌｌ 、、Ｃ１年
′１月３川」
１ｖ語庁１１官 宇 １′７ 屯 部 殿 、
′：１゛ｌｆｌ牛（ハ、ＩＸ 承
昭ｆｏ５・Ｄ年特許顎第１１３つ３ｌｌ５号゛ ５←明
の名（：【
七ヌノト焼成炉１非カスの月見前方イ去−補正をずろ音
Ｉｃ １′＋どの関係 特許出願人
や代叩人
ｉ′Ｉｒｉ正の文、１（
特許請求の範囲
焼成炉と仮焼炉の間に脱硝−炉を配置して焼成炉からの
排ガスを脱硝炉に導入し、又仮焼炉から排出される仮焼
原料粉末の少なくとも一部を脱硝炉に供給すると共に、
脱硝炉に燃料を供給して還元性ガス雰囲気を形成し、当
該脱硝炉内にて前記仮焼原料粉末を触奴として焼成炉か
らの排ガス中に含まれる窒素酸化物の還元を行わしめる
ことを特徴とする焼成炉排ガスの脱硝方法。
正 誤 表The drawing is a flow sheet of the entire cement firing apparatus for carrying out the denitrification method according to the present invention. ■...Suspension bre-heater 2...Calcination furnace 3...Denitration furnace 4...Calcination furnace 5...Talinker cooler 8...Bleed air duct 9...Calcination furnace burner 10...・Denitrification furnace burner 11... To the firing furnace Showa full,, C1 year
'January 3 Rivers' 1v Language Agency 11 Official U 1'7 Tonbe-dono,
′: 1゛lfl cow (Ha, IX Chensho fo 5/D year patent jaw No. 113 3ll5 No. 5゛ 5 ← Ming's name (: [ Seven Nunoto firing furnace 1 non-scum moon view forward I-correction zuro sound Ic 1' + Which relationship Patent applicant and representative applicant i' Iri positive sentence, 1 (Claims: A denitrification furnace is arranged between the calcining furnace and the calcining furnace, and the exhaust gas from the calcining furnace is transferred to the denitrification furnace. and supplying at least a part of the calcining raw material powder discharged from the calcining furnace to the denitrification furnace,
A reducing gas atmosphere is formed by supplying fuel to a denitrification furnace, and the nitrogen oxides contained in the exhaust gas from the calcining furnace are reduced in the denitrification furnace using the calcined raw material powder as a probe. Characteristic denitrification method for firing furnace exhaust gas. errata
Claims (1)
ガスを脱硝炉に導入し、又仮焼炉から排出される仮焼原
料粉末の少なくとも一部を脱硝炉に循環供給すると共に
、脱硝炉に燃料を供給して還元性ガス雰囲気を形成し、
当該脱硝炉内にて前記仮焼原料粉末を触媒として焼成炉
からの排ガス中に含まれる窒素酸化物の還元を行わしめ
ることを特徴とするセメント焼成炉排ガスの脱硝方法。A denitrification furnace is arranged between the firing furnace and the calcination furnace, the exhaust gas from the calcination furnace is introduced into the denitrification furnace, and at least a part of the calcining raw material powder discharged from the calcination furnace is circulated and supplied to the denitrification furnace. At the same time, fuel is supplied to the denitrification furnace to form a reducing gas atmosphere,
A method for denitration of exhaust gas from a cement kiln, characterized in that nitrogen oxides contained in the exhaust gas from the kiln are reduced in the denitrification furnace using the calcined raw material powder as a catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59189316A JPS6168129A (en) | 1984-09-10 | 1984-09-10 | Method for denitrating waste gas from cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59189316A JPS6168129A (en) | 1984-09-10 | 1984-09-10 | Method for denitrating waste gas from cement kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168129A true JPS6168129A (en) | 1986-04-08 |
| JPS6314649B2 JPS6314649B2 (en) | 1988-03-31 |
Family
ID=16239316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59189316A Granted JPS6168129A (en) | 1984-09-10 | 1984-09-10 | Method for denitrating waste gas from cement kiln |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168129A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6210154B1 (en) | 1997-04-22 | 2001-04-03 | Blue Circle Industries, Inc. | Treatment of exhaust gases from kilns |
| JP2013169495A (en) * | 2012-02-20 | 2013-09-02 | Taiheiyo Cement Corp | Cement kiln exhaust gas treatment apparatus and treatment method |
| WO2015133161A1 (en) * | 2014-03-06 | 2015-09-11 | 太平洋エンジニアリング株式会社 | Cement burning apparatus, and method for denitrating exhaust gas from cement kiln |
| JP2016522133A (en) * | 2013-04-11 | 2016-07-28 | カーハーデー フンボルト ヴェダーク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Operation method of cement production plant |
| JPWO2021019753A1 (en) * | 2019-08-01 | 2021-02-04 | ||
| CN112973415A (en) * | 2021-02-19 | 2021-06-18 | 清华大学 | Cement kiln device and SNCR denitration method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5227423A (en) * | 1975-08-26 | 1977-03-01 | Ishikawajima Harima Heavy Ind | Method of removing nitrogen oxides in apparatus for baking raw materials for cement with calcinning furnace |
-
1984
- 1984-09-10 JP JP59189316A patent/JPS6168129A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5227423A (en) * | 1975-08-26 | 1977-03-01 | Ishikawajima Harima Heavy Ind | Method of removing nitrogen oxides in apparatus for baking raw materials for cement with calcinning furnace |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6210154B1 (en) | 1997-04-22 | 2001-04-03 | Blue Circle Industries, Inc. | Treatment of exhaust gases from kilns |
| JP2013169495A (en) * | 2012-02-20 | 2013-09-02 | Taiheiyo Cement Corp | Cement kiln exhaust gas treatment apparatus and treatment method |
| JP2016522133A (en) * | 2013-04-11 | 2016-07-28 | カーハーデー フンボルト ヴェダーク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Operation method of cement production plant |
| WO2015133161A1 (en) * | 2014-03-06 | 2015-09-11 | 太平洋エンジニアリング株式会社 | Cement burning apparatus, and method for denitrating exhaust gas from cement kiln |
| JPWO2015133161A1 (en) * | 2014-03-06 | 2017-04-06 | 太平洋エンジニアリング株式会社 | Cement firing device and denitration method for cement kiln exhaust gas |
| JPWO2021019753A1 (en) * | 2019-08-01 | 2021-02-04 | ||
| WO2021019753A1 (en) * | 2019-08-01 | 2021-02-04 | 太平洋エンジニアリング株式会社 | Cement firing device and cement kiln exhaust gas denitrification method |
| CN112973415A (en) * | 2021-02-19 | 2021-06-18 | 清华大学 | Cement kiln device and SNCR denitration method |
| CN112973415B (en) * | 2021-02-19 | 2022-04-22 | 清华大学 | Cement kiln device and SNCR denitration method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6314649B2 (en) | 1988-03-31 |
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