JPS6231249B2 - - Google Patents
Info
- Publication number
- JPS6231249B2 JPS6231249B2 JP57072142A JP7214282A JPS6231249B2 JP S6231249 B2 JPS6231249 B2 JP S6231249B2 JP 57072142 A JP57072142 A JP 57072142A JP 7214282 A JP7214282 A JP 7214282A JP S6231249 B2 JPS6231249 B2 JP S6231249B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- combustion
- nozzle
- primary
- emulsified
- 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
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
- F23C6/047—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 with fuel supply in stages
-
- 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
- F23C2201/00—Staged combustion
- F23C2201/10—Furnace staging
- F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
【発明の詳細な説明】 本発明はNOx抑制三段燃焼法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-stage combustion method for NOx suppression.
従来の三段燃焼法においては、第１図及び第２
図に示すように、一次燃料ノズル１と一次空気ノ
ズル２とを有する一次バーナ３、二次燃料ノズル
４及び二次空気ノズル５が順次燃焼後流側に配置
されて、その二次燃焼域を還元雰囲気とすること
により、それまで発生したNOxをN2に還元するこ
とによつてNOxの低減化が図られている。なお、
第１図は燃焼室６が竪型の場合を示し、第２図は
燃焼室６が横型の場合を示し、また図中、７は燃
料供給管、８は燃焼室６内壁に配置された伝熱
管、Ａは一次燃焼域、Ｂは二次燃焼域、Ｃは三次
燃焼域を示す。 In the conventional three-stage combustion method, Fig. 1 and Fig. 2
As shown in the figure, a primary burner 3 having a primary fuel nozzle 1 and a primary air nozzle 2, a secondary fuel nozzle 4, and a secondary air nozzle 5 are sequentially arranged on the downstream side of combustion to control the secondary combustion area. By creating a reducing atmosphere, NO x generated up to that point is reduced to N 2 , thereby reducing NO x . In addition,
Fig. 1 shows a case where the combustion chamber 6 is vertical, and Fig. 2 shows a case where the combustion chamber 6 is horizontal. In the heat tube, A indicates the primary combustion zone, B indicates the secondary combustion zone, and C indicates the tertiary combustion zone.
ところで、上記のような三段燃焼方法による
と、負荷の高い炉、若しくは小型の炉にあつて
は、燃焼ガスの炉内滞留時間が短かく煤塵量が増
加する傾向があり、特に重質燃料を用いた場合、
その傾向が著しいという欠点があつた。 By the way, according to the three-stage combustion method as described above, in the case of a high-load furnace or a small-sized furnace, the residence time of combustion gas in the furnace is short and the amount of soot and dust tends to increase. When using
The drawback was that this tendency was remarkable.
そこで、本発明は上記欠点を解消し得るNOx抑
制三段燃焼法を提供することを目的とする。 Therefore, an object of the present invention is to provide a NO x suppression three-stage combustion method that can eliminate the above-mentioned drawbacks.
即ち、本発明は一次バーナ、二次燃料ノズル及
び二次空気ノズルが順次燃焼後流側に配置されて
三段燃焼を行なう際に、上記二次燃料ノズルに供
給する燃料として乳化燃料を使用することを特徴
とするNOx抑制三段燃焼法である。 That is, the present invention uses emulsified fuel as the fuel supplied to the secondary fuel nozzle when the primary burner, secondary fuel nozzle, and secondary air nozzle are sequentially arranged on the downstream side of combustion to perform three-stage combustion. This is a three-stage NO x suppression combustion method characterized by the following.
かかる方法によると、二次燃料として乳化燃料
を使用するので、例えば全部の燃料を乳化した場
合に比べて、水混入による熱損失の増加を抑える
ことができると共に、煤塵発生量を大幅に抑える
ことができる。 According to this method, since emulsified fuel is used as the secondary fuel, it is possible to suppress an increase in heat loss due to water contamination, and to significantly suppress the amount of soot and dust generated, compared to, for example, when all the fuel is emulsified. I can do it.
以下、本発明の一実施例を第３図に基づき説明
する。なお、第３図は竪型の燃焼室１１の場合を
示す。燃焼室１１には、順次、一次バーナ１２、
二次燃料ノズル１３、及び二次空気ノズル１４が
燃焼後流側に（即ち、下から上に向つて）配置さ
れ、また一次バーナ１２にはオイルポンプ１５と
オイルヒーター１６を有する主燃料供給管１７が
接続され、二次燃料ノズル１３には主燃料供給管
１７のオイルヒーター１６下流側から分枝された
副燃料供給管１８が接続され、二次空気ノズル１
４には空気が供給されて、三段燃焼が成される。
そして、この三段燃焼時において、二次燃料ノズ
ル１３に供給される燃料中に、熱水を混入、撹拌
させて、二次燃料を乳化即ちエマルジヨン燃料と
して燃焼室１１に供給する。従つて、上記副燃料
供給管１８途中には、水ポンプ１９とヒータ２０
を有する熱水供給管２１が接続され、また副燃料
供給管１８の熱水供給管２１接続部下流側には、
燃料と熱水とを混合撹拌させるミキサー２２が設
けられている。 An embodiment of the present invention will be described below with reference to FIG. Note that FIG. 3 shows the case of a vertical combustion chamber 11. In the combustion chamber 11, a primary burner 12,
A secondary fuel nozzle 13 and a secondary air nozzle 14 are arranged on the combustion wake side (that is, from the bottom to the top), and the primary burner 12 has a main fuel supply pipe having an oil pump 15 and an oil heater 16. 17 is connected to the secondary fuel nozzle 13, and an auxiliary fuel supply pipe 18 branched from the downstream side of the oil heater 16 of the main fuel supply pipe 17 is connected to the secondary fuel nozzle 13.
Air is supplied to No. 4 to perform three-stage combustion.
During this three-stage combustion, hot water is mixed into the fuel supplied to the secondary fuel nozzle 13 and stirred, and the secondary fuel is supplied to the combustion chamber 11 as emulsified fuel. Therefore, a water pump 19 and a heater 20 are installed in the middle of the auxiliary fuel supply pipe 18.
A hot water supply pipe 21 with a
A mixer 22 is provided to mix and stir fuel and hot water.
このように、二次燃料として乳化燃料を使用す
るので、例えば全部の燃料を乳化した場合に比べ
て、水混入による熱損失の増加を抑えることがで
きると共に、煤塵発生量を大幅に抑えることがで
きる。ところで、一次燃料として乳化燃料を使用
することも考えられるが、その必要がない。即
ち、三段燃焼法においては、一次燃焼域の空気比
は1.1前後であり、この部分での燃焼は最も燃焼
効率が高く未然分の発生が少ないため、すすの対
策の必要がない。またNOxについては、一次燃焼
域でかなり発生するが二次燃焼域で還元されるた
め、一次燃焼域でのNOx低減対策は必要としな
い。 In this way, since emulsified fuel is used as the secondary fuel, it is possible to suppress the increase in heat loss due to water contamination, and to significantly reduce the amount of soot and dust generated, compared to, for example, when all the fuel is emulsified. can. By the way, although it is conceivable to use emulsified fuel as the primary fuel, it is not necessary. That is, in the three-stage combustion method, the air ratio in the primary combustion area is around 1.1, and combustion in this area has the highest combustion efficiency and generates the least amount of green matter, so there is no need to take measures against soot. Regarding NO x , a considerable amount is generated in the primary combustion area, but it is reduced in the secondary combustion area, so NO x reduction measures are not required in the primary combustion area.
なお、実際の燃焼運転時における二次燃料のエ
マルジヨン率と発生煤塵量との関係を示すと第４
図に示すグラフのようになる。 In addition, the relationship between the emulsion rate of secondary fuel and the amount of dust generated during actual combustion operation is shown in the fourth table.
The graph will look like the one shown in the figure.
第１図及び第２図は従来例を示す概略構成図、
第３図は本発明の一実施例の概略構成図、第４図
は二次燃料として乳化燃料を使用した場合におけ
るO2濃度と発生煤塵量との関係を示すグラフで
ある。
１１……燃焼室、１２……一次バーナ、１３…
…二次燃料ノズル、１４……二次空気ノズル、１
５……オイルポンプ、１６……オイルヒーター、
１７……主燃料供給管、１８……副燃料供給管、
１９……水ポンプ、２０……ヒーター、２１……
熱水供給管、２２……ミキサー。
1 and 2 are schematic configuration diagrams showing a conventional example,
FIG. 3 is a schematic configuration diagram of an embodiment of the present invention, and FIG. 4 is a graph showing the relationship between the O 2 concentration and the amount of generated soot and dust when emulsified fuel is used as the secondary fuel. 11... Combustion chamber, 12... Primary burner, 13...
...Secondary fuel nozzle, 14...Secondary air nozzle, 1
5...Oil pump, 16...Oil heater,
17...Main fuel supply pipe, 18...Sub fuel supply pipe,
19...Water pump, 20...Heater, 21...
Hot water supply pipe, 22... mixer.
Claims (1)
ズルが順次燃焼後流側に配置されて三段燃焼を行
なう際に、上記二次燃料ノズルに供給する燃料と
して乳化燃料を使用することを特徴とするNOx抑
制三段燃焼法。1. A primary burner, a secondary fuel nozzle, and a secondary air nozzle are sequentially arranged on the downstream side of combustion to perform three-stage combustion, and emulsified fuel is used as the fuel supplied to the secondary fuel nozzle. Three-stage combustion method for NO x suppression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7214282A JPS58187712A (en) | 1982-04-27 | 1982-04-27 | Nox suppression three-step burning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7214282A JPS58187712A (en) | 1982-04-27 | 1982-04-27 | Nox suppression three-step burning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58187712A JPS58187712A (en) | 1983-11-02 |
| JPS6231249B2 true JPS6231249B2 (en) | 1987-07-07 |
Family
ID=13480727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7214282A Granted JPS58187712A (en) | 1982-04-27 | 1982-04-27 | Nox suppression three-step burning method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58187712A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6287707A (en) * | 1985-10-14 | 1987-04-22 | Hitachi Zosen Corp | NOx suppression combustion method |
| FR2825448B1 (en) * | 2001-05-30 | 2003-09-12 | Inst Francais Du Petrole | THERMAL GENERATOR FOR LIMITING EMISSIONS OF NITROGEN OXIDES BY RECOMBUSTION OF FUMES AND METHOD FOR IMPLEMENTING SUCH A GENERATOR |
| US7168947B2 (en) * | 2004-07-06 | 2007-01-30 | General Electric Company | Methods and systems for operating combustion systems |
| JP2009276044A (en) * | 2008-04-14 | 2009-11-26 | Toshiharu Fukai | Combustion apparatus for emulsified fuel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322689B2 (en) * | 1972-10-09 | 1978-07-10 | ||
| JPS5270434A (en) * | 1975-12-09 | 1977-06-11 | Hitachi Zosen Corp | Method of three-stage burning for suppressing generation of nitrogen |
| US4257763A (en) * | 1978-06-19 | 1981-03-24 | John Zink Company | Low NOx burner |
-
1982
- 1982-04-27 JP JP7214282A patent/JPS58187712A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58187712A (en) | 1983-11-02 |
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