JPS58120004A - Two-staged combustion - Google Patents
Two-staged combustionInfo
- Publication number
- JPS58120004A JPS58120004A JP177082A JP177082A JPS58120004A JP S58120004 A JPS58120004 A JP S58120004A JP 177082 A JP177082 A JP 177082A JP 177082 A JP177082 A JP 177082A JP S58120004 A JPS58120004 A JP S58120004A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- gas
- air
- nox
- furnace
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は二段燃焼方法に関し、さらに詳しくは、燃焼用
空気を二段またはそれ以上に分割して供給する窒素酸化
物(NO,)低減を目指した二段燃焼方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-stage combustion method, and more specifically, a two-stage combustion method aiming at reducing nitrogen oxides (NO,) in which combustion air is divided into two or more stages and supplied. Regarding.
燃焼排ガス中のNO,@[を低減させる方法は数多く提
案および実施されているが、そのうち、炉内で低減させ
る方法の主なものは次のとおりである。Many methods have been proposed and implemented to reduce NO,@[ in the combustion exhaust gas, among which the main methods for reducing NO in the furnace are as follows.
(1)燃焼用空気を分割した二段燃焼法、(2)燃焼用
空気に燃焼排ガスを混ぜた排ガス循環法、(3)高温燃
焼ガスK NE(sを注入する無触媒還元法、(4)超
高温燃焼ガスに燃料の一部を注入する燃料注入法。(1) Two-stage combustion method in which combustion air is divided, (2) Exhaust gas circulation method in which combustion air is mixed with combustion exhaust gas, (3) Non-catalytic reduction method in which high-temperature combustion gas KNE(s) is injected, (4) ) A fuel injection method in which a portion of the fuel is injected into the ultra-high temperature combustion gas.
これらの方法は、廃棄物焼却炉、加熱炉、lイラ等にお
い【単独、または組合わせて採用されている。しかし一
般に流動層焼却炉などの流動炉においては、超高温部(
1100℃以上]がないため、燃料注入法は適用するこ
とができない、またバーナ燃焼でないため、排ガス循環
法の効果は非常に少ない、無触媒還元法はSOO〜95
0℃の燃焼ガスに微量のNHsガスを注入する方法であ
るが、燃焼ガスとNEIsガスの混合が重畳であるため
、−特別の注入ノズル等を設けて工夫をこらす必要があ
る。従って、流動層燃焼炉に対しては簡便な二段燃焼法
が現在主流となっている。These methods are employed singly or in combination in waste incinerators, heating furnaces, lira, etc. However, in general, in fluidized bed incinerators and other fluidized bed incinerators, the ultra-high temperature section (
1100℃ or higher], so the fuel injection method cannot be applied.Also, since it is not burner combustion, the effect of the exhaust gas circulation method is very small.The non-catalytic reduction method is SOO ~ 95
This method involves injecting a small amount of NHs gas into the combustion gas at 0°C, but since the combustion gas and NEIs gas are mixed in a superimposed manner, it is necessary to use a special injection nozzle or the like. Therefore, the simple two-stage combustion method is currently the mainstream for fluidized bed combustion furnaces.
本発明者は先に、このような、二段燃焼法において、酸
素11度の低い、または酸素がはとんとない一次燃焼部
でNOxが充分還元されるように一次燃焼部のガス滞留
時間を充分長くとった後に二次空気を供給し、残りの未
燃分を完全燃焼させる低NO。The present inventor previously discovered that in such a two-stage combustion method, the gas residence time in the primary combustion section should be sufficient so that NOx is sufficiently reduced in the primary combustion section where the oxygen temperature is low at 11 degrees Celsius or oxygen is completely absent. Low NO that supplies secondary air after a long period of time and completely burns the remaining unburned matter.
二段燃焼法を提案したが(轡願1852−141918
号)、NO,低減効果については必らずしも充分ではな
かった。I proposed a two-stage combustion method (Request No. 1852-141918)
(No.), NO, the reduction effect was not necessarily sufficient.
本発明の目的は、前記二段燃焼法を改善し、さらKNO
,を抑制することができる方法を提供するととKある。The purpose of the present invention is to improve the two-stage combustion method and further improve the KNO
, K provides a method that can suppress .
本発明は、燃倫炉Km鉤用空気を二段またはそれ以上に
分割供給して燃焼ガス中のNo、を低減させる二段燃焼
方法において、二段目またはそれ以降に供給する空気中
にアンモニアを供給することを特徴とする。The present invention provides ammonia in the air supplied to the second stage or later in a two-stage combustion method in which air for the combustion furnace Km is dividedly supplied to two or more stages to reduce NO in the combustion gas. It is characterized by supplying.
以下、本発明を図面によって詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to the drawings.
第1図は、本発明の代表的な実施例を説明するための流
動炉の概略図である。図において、燃焼用空気は2段に
分けられ、それぞれ1次空気供給ライン5および2次空
気供給ライン7から流動炉1内に供給される。すなわち
、供給燃料量の理論空気量近辺の量(1次空気比=0.
8〜14)K和尚する空気は、1次空気供給ライン5が
ら空気箱2を介してペッドssに供給され、燃料供給ラ
イン6から供給された燃料はペッドs3で北壁的酸素不
足の条件下で1次燃焼される0次にペッド部3から上昇
する燃焼ガスは、還元部4ムで所定の滞留時間を与えら
れた後、フリーボード部4内で2次空気供給ライン7か
ら2次空気の供給を5ける。ついで酸化54 Bにおい
て燃焼ガス中和残存す−る未燃分が完全燃焼される。こ
の場合、還元部4ムで与える所定のガス滞留時間は、ペ
ッド部3から上昇する燃焼ガス中のNOxが共に含有し
ている未燃分により充分還元されてN!になるのに必要
な時間であり、LO〜3.0秒が適当である。FIG. 1 is a schematic diagram of a fluidized bed furnace for explaining a typical embodiment of the present invention. In the figure, combustion air is divided into two stages and supplied into the fluidized bed furnace 1 from a primary air supply line 5 and a secondary air supply line 7, respectively. In other words, the amount of supplied fuel is close to the theoretical air amount (primary air ratio = 0.
8 to 14) Air for cooling is supplied from the primary air supply line 5 to the ped ss via the air box 2, and fuel supplied from the fuel supply line 6 is supplied to the ped s3 under oxygen-deficient conditions on the north wall. After being given a predetermined residence time in the reducing part 4, the combustion gas rising from the zero-order ped part 3, which is primarily combusted in Multiply the supply by 5. Then, in oxidation step 54B, the combustion gas is neutralized and the remaining unburnt components are completely combusted. In this case, the predetermined gas residence time given by the reducing section 4 is such that NOx in the combustion gas rising from the ped section 3 is sufficiently reduced by the unburned components contained together with N! This is the time required for the LO to 3.0 seconds.
本発明(おいては、上記二段燃焼における2次空気供給
ライン7の途中でライン8から所定量のアンモニア(N
Hs )ガスを注入する。 NHsガスの注入量は多い
椙効釆が大きいが、燃料および1次空気比などKよって
異なる酸化部48に流入する燃焼ガス中のNO,濃度、
NOx抑制目標および経済性等を考慮し【決定される。In the present invention, a predetermined amount of ammonia (N
Hs) Inject gas. The amount of NHs gas injected is large, but the concentration of NO in the combustion gas flowing into the oxidizing section 48 varies depending on the fuel and primary air ratio.
[Determined] taking into account NOx suppression goals and economic efficiency.
通常、全燃焼ガス量基準でs o oppt以下、すな
わち全燃焼ガス量の2000分の1より少ない注入量で
十分である。2000分の1以上注入してもその増量効
果は余りない。このアンモニアガスの注入により、還元
部4ムで還元されなかった残存NO,が酸化部4Bで還
元され、ライン9から排出される排ガス中の黒濃度かさ
らに低減される。Usually, an injection amount of less than so optt based on the total amount of combustion gas, that is, less than 1/2000 of the total amount of combustion gas, is sufficient. Even if 1/2000 or more is injected, the effect of increasing the amount will not be significant. By injecting this ammonia gas, residual NO, which has not been reduced in the reducing part 4m, is reduced in the oxidizing part 4B, and the black concentration in the exhaust gas discharged from the line 9 is further reduced.
なお、第1図の破I11?イン7ム、8ムで示す橡に、
2次空気を2分割(又は3分割)して供給する方法を本
発明者が先に提案したが(特願昭52−141915号
)、この方法においてNH,ガスを2次空気に注入する
と、ライン9から排出される排ガス中のNO8#11度
は、前記の2次空気を分割しない方法に比してさらに低
減する。この場合、NHsガスを分割した2次空気の上
段、下段いづれに注入しても効果が岡薯度であることが
実験的に確絃された。In addition, break I11 in Figure 1? In the square indicated by in 7m and 8m,
The present inventor previously proposed a method of supplying secondary air by dividing it into two parts (or three parts) (Japanese Patent Application No. 141915/1982), but in this method, when NH and gas are injected into the secondary air, The NO8 concentration in the exhaust gas discharged from the line 9 is further reduced compared to the method described above in which the secondary air is not divided. In this case, it has been experimentally determined that the effect is the same even if the NHs gas is injected into either the upper or lower stage of the divided secondary air.
上記のように2次空気中KN)1mガスを注入すること
は、燃焼ガスとの混合が嵐いために残存No8と注入N
H,との反応が早く、また次式に示すNO。As mentioned above, injecting 1 m of KN) gas in the secondary air is difficult to mix with the combustion gas, so the residual No. 8 and the injected N
The reaction with H, is fast, and NO shown in the following formula.
とNHsの反応に必要な酸素も充分与えられるので効果
が大きい。The effect is great because sufficient oxygen is provided for the reaction between and NHs.
ガスの他に、NH,ガス成分を含む廃ガスでもよく、ま
たNHmガスの代りKHCNガスを用いることも可能で
ある。In addition to gas, waste gas containing NH and gas components may be used, and KHCN gas may be used instead of NHm gas.
次に第2図は、第1図に示す流動炉を用い、総括空気比
を1.23(すなわち空気過剰率23嘔)と一定にした
条件下で1次空気供給量(すなわち1次空気比)を減少
させて燃料(石庚)の二段燃焼を行なった場合の洲、ガ
ス注入結果を示したものである。横軸の1次空気比は2
段燃焼の度合を示し、縦軸のNO,濃度は燃焼ガス中の
値である。Next, Fig. 2 shows the primary air supply amount (i.e., the primary air ratio ) shows the results of gas injection when two-stage combustion of fuel (sekigen) is performed. The primary air ratio on the horizontal axis is 2
It shows the degree of staged combustion, and the NO concentration on the vertical axis is the value in the combustion gas.
図中、−纏ムは、二段燃焼単独の場合、−−Bは二段燃
焼で2次空気中に洲、を110WIp注入した場合、S
aCは同様にNHsを460簿注入した場合をそれぞれ
示す。二段燃焼を行なわない場合(1次および総括空気
比が共K 1.2 B )は270−のNO!濃度であ
ったものが、二段燃焼を行ない、1次空気比を下げるこ
とによってNO,は110jP近くまで低下することが
分る(曲線ム)、これに対して一1i1B%Cの場合は
、例えば1次空気比を0.9とした二段燃焼単独条件下
で130pであったNo、ls1度が、金燃焼ガス量に
対して110−ないしく6Gwes@轟のNEl、ガス
を2次空気に注入することによって約80〜6o−まで
低下することが分る。In the figure, -M is the case of two-stage combustion alone, -B is the case of two-stage combustion and S is injected into the secondary air at 110 WIp, S
Similarly, aC shows the case where 460 NHs were injected. If two-stage combustion is not performed (primary and overall air ratios are both K 1.2 B), 270-NO! It can be seen that the NO concentration decreases to nearly 110jP by performing two-stage combustion and lowering the primary air ratio (curve m).On the other hand, in the case of -1i1B%C, For example, No.ls 1 degree, which was 130p under two-stage combustion alone with the primary air ratio of 0.9, is 110-6Gwes@Todoroki's NEL for the amount of gold combustion gas, and the gas is transferred to the secondary air. It can be seen that the temperature decreases to about 80 to 6 o- by injecting it to .
なお、NHsガスの注入位置として、2次空気以外に、
第1図で示す還元部4ムやベッド部3に損hガスを注入
してみたが、効果はあまりなかった。In addition to secondary air, the injection position of NHs gas is
I tried injecting loss gas into the reducing section 4m and bed section 3 shown in Figure 1, but it did not have much effect.
%にベッド部3に注入した場合は全く効果がない。%, it has no effect at all when injected into the bed portion 3.
本発明は、misに示した燃焼炉以外に、第3図に示す
ようなバーナ13を用いたガス燃料、油、微粉炭、廃棄
物の燃焼炉にも適用することができる。この燃焼炉11
は、1次燃焼室11Aおよび2次燃焼1!IIBとに区
分され、燃料15が供給されるバーナ13が貫通する空
気箱14にはツイン16から1次空気が供給される。ま
た2次燃焼室11BKはライン17から2次空気が供給
され、該ライン17にはライン18からNHsガスが注
入される。この場合、例えばライン16から供給する1
次空気量を、ライン15から供給する燃料量の理論空気
量近辺とし、1次燃焼1111ム内で比較的酸素不足の
状態で1次燃焼させ、2次燃焼室11B内に供給する2
次空気に所定量の洲、ガスを注入することにより、2段
燃焼単独の効果以上に排ガス19中のNOx磯度濃度減
させることができる。The present invention can be applied to a combustion furnace for gas fuel, oil, pulverized coal, or waste using a burner 13 as shown in FIG. 3, in addition to the combustion furnace shown in FIG. This combustion furnace 11
are the primary combustion chamber 11A and the secondary combustion 1! Primary air is supplied from the twin 16 to the air box 14, which is divided into IIB and IIB and is penetrated by the burner 13 to which fuel 15 is supplied. Further, secondary air is supplied to the secondary combustion chamber 11BK from a line 17, and NHs gas is injected into the line 17 from a line 18. In this case, for example, the 1
The amount of secondary air is set to be close to the theoretical amount of air of the amount of fuel supplied from the line 15, primary combustion is performed in a relatively oxygen-deficient state within the primary combustion chamber 1111, and the amount of fuel is supplied into the secondary combustion chamber 11B.
By injecting a predetermined amount of air into the secondary air, the NOx concentration in the exhaust gas 19 can be reduced more than the effect of two-stage combustion alone.
さらに第4図は、バーナ回りから供給する燃焼用空気を
分割した通常の二段燃焼法に本発明を適用した例を示す
。炉壁IK挿入されたバーナ130回り忙は1次空気箱
14Aと2次空気箱14Bが設けられ、ライン16およ
び17からそれぞれ1次空気および2次空気が供給され
、2次空気にはライン18から所定量のN1(sガスが
供給される。Furthermore, FIG. 4 shows an example in which the present invention is applied to a normal two-stage combustion method in which combustion air supplied from around the burner is divided. A primary air box 14A and a secondary air box 14B are provided around the burner 130 inserted into the furnace wall, and primary air and secondary air are supplied from lines 16 and 17, respectively, and the secondary air is supplied from line 18. A predetermined amount of N1(s gas is supplied from
なお、図中、20は火炎、21は’NHsガスを含む2
次空気を示す、上記のような炉構成においても、2次空
気にライン18から麗、ガスを注入することにより、単
なる二段燃焼以上に排ガス中のNO。In addition, in the figure, 20 is a flame, and 21 is 2 containing 'NHs gas.
Even in the above-mentioned furnace configuration in which the secondary air is injected into the secondary air from the line 18, NO in the exhaust gas can be reduced more than just two-stage combustion.
濃度を低減させることができる。concentration can be reduced.
本発明の効果を列挙すれば下肥のようである。If the effects of the present invention are enumerated, they are similar to manure.
(1)2段燃焼の度合をやわらげることができる。すな
わち、2段燃焼I)度合を強める(1次空気比を下げる
)K従つcNo、a度は低下するが、わずかな量の洲、
ガスを2次空気に注入するととによって、緩慢な二段燃
焼条件下(例えば、1次空気比= 1.15 ) K、
おいても、度合の強い二段燃焼条件下(例えば1次空気
比=0.*)と同稠度のNO8濃i!を達成することが
できる。(1) The degree of second-stage combustion can be reduced. In other words, the two-stage combustion I) increases the degree (lowers the primary air ratio), so the cNo, a degree decreases, but only by a small amount,
By injecting the gas into the secondary air under slow two-stage combustion conditions (e.g. primary air ratio = 1.15) K,
Even if the NO8 concentration is the same as under strong two-stage combustion conditions (for example, primary air ratio = 0.*)! can be achieved.
(2)上記α)Kより高い燃焼効率を得ることができる
。(2) Higher combustion efficiency than α)K above can be obtained.
一般に1次空気比の低下に伴なって炉外に排出する未燃
分が増加するので、1次空気比を高くできることは高燃
焼効率につながる。Generally, as the primary air ratio decreases, the amount of unburned matter discharged outside the furnace increases, so being able to increase the primary air ratio leads to high combustion efficiency.
(3)上記(1)により1次空気比が高くなると、ベッ
ド部で燃える割合が増加し、フリーボード部で燃える後
燃焼の割合が減少するため、炉容積を小さくすることが
できる。これは流動層焼却炉や流動層ボイラ勢の大型炉
において有利である。また流動層ボイラの場合、1次空
気比が高くなると、伝熱係数の大きいベッド部での燃焼
割合が増加するので伝熱面積を減少させることかできる
。また流動(倫
層焼却の場合には、ベッド部での燃焼割合が増加するの
で、補助燃料を削減することができる。(3) When the primary air ratio increases due to (1) above, the proportion of combustion in the bed section increases and the proportion of post-combustion burning in the freeboard section decreases, so the furnace volume can be reduced. This is advantageous in large-scale furnaces such as fluidized bed incinerators and fluidized bed boilers. Furthermore, in the case of a fluidized bed boiler, when the primary air ratio increases, the combustion rate in the bed portion where the heat transfer coefficient is large increases, so the heat transfer area can be reduced. In addition, in the case of fluidized bed incineration, the combustion rate in the bed increases, so the amount of auxiliary fuel can be reduced.
(4)上記(1) Kより、流動層ボイ2の場合、炉内
で高度のNO,抑制と石灰石による脱硫を同時に達成す
ることができる。1次空気比を低くすると炉内脱硫率が
悪くなるので、炉内脱硫率の高い1次空気比の高い条件
下(緩慢な2段燃焼条件)で運転し、1次空気比の増加
に伴なうNO□抑制効果の低下を、2次空気への洲、ガ
ス注入で補なうことができるので、高度のNoX抑制と
高度の炉内脱硫を同時に達成することができ、また脱硫
剤を節約することができる。(4) From (1) K above, in the case of fluidized bed boiler 2, a high degree of NO suppression and desulfurization using limestone can be simultaneously achieved in the furnace. If the primary air ratio is lowered, the in-furnace desulfurization rate will deteriorate, so operate under conditions with a high primary air ratio (slow two-stage combustion conditions) where the in-furnace desulfurization rate is high, and as the primary air ratio increases, Since the decrease in the NO□ suppression effect can be compensated for by injecting gas into the secondary air, it is possible to achieve a high degree of NoX suppression and a high degree of in-furnace desulfurization at the same time. You can save money.
(5)非常に簡便な方法である。すなわち、2次空気が
炉内に入る前にNHsガスを注入するだけで喪く、また
2次空気と共に炉内に注入するので、燃焼ガスとの混合
性が非常に良く、無触還元法のように特別な注入ノズル
等を設ける必要がない。(5) It is a very simple method. In other words, the NHs gas is simply injected into the furnace before the secondary air enters the furnace, and since it is injected into the furnace together with the secondary air, it mixes very well with the combustion gas, making it ideal for non-catalytic reduction. There is no need to provide a special injection nozzle or the like.
第1図は、本発明が適用されると燃焼炉の概略を示す断
面図、第2図は、本発明の燃焼方法の効(1G)
果を説明する図、第31aおよび第4図は、本発明が適
用される他の燃焼炉のアンモニア注入方法を示す図であ
る。
1・・・炉、3−ベッド部、4・−・クリ−ボード部、
4A・・・還元部、4B・・・酸化部、7・・・2次空
気供給ライン、8・・・損0ガス注入ライン。
代理人 弁理士 川 北 武 長
筒1図
第2図
第3図
手続補正書
昭和i7年4月7日
特許庁長官 島田春樹殿
1、事件の表示
昭和s7年 轡許願第17フO号
2、発明の1称 二段燃情方法
3 補正をする者
事件との関係 善許出原人
4 代 理 人 〒lHI
3″′ (マ5is)弁理士 用北武長5、 補正命令
の日付 自発6、 補正により増加する発
明の数
7、補正の対象
に改める。
(乃@綱書嬉5頁第13行の「上段、下段」を「上段(
7ム)、下段(η」に改める。
(3)図面第2図および第4図をそれぞれ別紙のよ5に
改める。
以上FIG. 1 is a sectional view schematically showing a combustion furnace to which the present invention is applied, FIG. 2 is a diagram illustrating the effect (1G) of the combustion method of the present invention, and FIGS. 31a and 4 are It is a figure which shows the ammonia injection method of another combustion furnace to which this invention is applied. 1...furnace, 3-bed section, 4--creeboard section,
4A... Reduction section, 4B... Oxidation section, 7... Secondary air supply line, 8... Zero loss gas injection line. Attorney Takeshi Kawakita Nagatsutsu 1 Figure 2 Figure 3 Procedural amendments April 7, 1937 Commissioner of the Japan Patent Office Haruki Shimada 1, Indication of the case 1939, Request for Permission No. 17, No. 2, First name of the invention Two-step passion method 3 Relationship with the case of the person making the amendment 4 Proxy attorney 〒lHI 3″' (Ma5 is) Patent attorney Yokita Takecho 5 Date of amendment order Voluntary 6 , The number of inventions will increase by the amendment to 7, and the subject of the amendment will be changed.
(3) Figures 2 and 4 of the drawings are respectively revised to Attachment 5.
Claims (1)
供給して燃焼ガス中のNO,を低減させる二段燃焼方法
において、二段目またはそれ以降に供給する空気中にア
ンモニアを供給することを特徴とする二段燃焼方法。(1) In a two-stage combustion method in which combustion air is dividedly supplied to a combustion furnace in two or more stages to reduce NO in the combustion gas, ammonia is supplied to the air supplied in the second stage or later. A two-stage combustion method characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP177082A JPS58120004A (en) | 1982-01-11 | 1982-01-11 | Two-staged combustion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP177082A JPS58120004A (en) | 1982-01-11 | 1982-01-11 | Two-staged combustion |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58120004A true JPS58120004A (en) | 1983-07-16 |
Family
ID=11510806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP177082A Pending JPS58120004A (en) | 1982-01-11 | 1982-01-11 | Two-staged combustion |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58120004A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131335A (en) * | 1989-12-27 | 1992-07-21 | Saarbergwerke Aktiengesellschaft | Process for reducing nitric oxide emission during the combustion of solid fuels |
EP0512156A1 (en) * | 1991-05-07 | 1992-11-11 | Ente Nazionale Per L'energia Elettrica - (Enel) | A process for reducing nitric oxides in a flue gas |
EP0581850A1 (en) * | 1991-03-22 | 1994-02-09 | Energy & Environ Res Corp | ADVANCED REBURNING FOR REDUCTION OF NO x? EMISSIONS IN COMBUSTION SYSTEMS. |
-
1982
- 1982-01-11 JP JP177082A patent/JPS58120004A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131335A (en) * | 1989-12-27 | 1992-07-21 | Saarbergwerke Aktiengesellschaft | Process for reducing nitric oxide emission during the combustion of solid fuels |
EP0581850A1 (en) * | 1991-03-22 | 1994-02-09 | Energy & Environ Res Corp | ADVANCED REBURNING FOR REDUCTION OF NO x? EMISSIONS IN COMBUSTION SYSTEMS. |
EP0581850A4 (en) * | 1991-03-22 | 1994-05-18 | Energy And Environmental Research Corporation | Advanced reburning for reduction of no x? emissions in combustion systems |
EP0512156A1 (en) * | 1991-05-07 | 1992-11-11 | Ente Nazionale Per L'energia Elettrica - (Enel) | A process for reducing nitric oxides in a flue gas |
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