JPH025247Y2 - - Google Patents
Info
- Publication number
- JPH025247Y2 JPH025247Y2 JP1984007563U JP756384U JPH025247Y2 JP H025247 Y2 JPH025247 Y2 JP H025247Y2 JP 1984007563 U JP1984007563 U JP 1984007563U JP 756384 U JP756384 U JP 756384U JP H025247 Y2 JPH025247 Y2 JP H025247Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- exhaust gas
- combustibility
- air system
- combustion
- 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
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- Regulation And Control Of Combustion (AREA)
Description
【考案の詳細な説明】
本考案は、燃料混焼ボイラの燃焼空気供給装置
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion air supply device for a fuel mixed combustion boiler.
一般に、ボイラの窒素酸化物（NOX）低減の
ために、燃焼用空気ダクト内に燃焼排ガスを混入
する排ガス混合方式が広く採用されているが、ボ
イラに使用する燃料には、重油・天然ガス等比較
的燃焼性の良いものと、製鉄所から供給される高
炉ガスあるいは石油コークス等揮発分が少なく燃
焼性に劣るものとがあり、これら燃料の混焼ボイ
ラでは、燃焼性の良い燃料の燃焼空気系統には
NOX低減のために排ガス混合装置を設置する場
合があつても、燃焼性の劣る燃料の燃焼空気系統
には、燃焼性を確保するために排ガス混合装置を
設置しないか、あるいは別の排ガス混合装置を設
置して燃焼性を損わない程度に排ガスを混合させ
るようにしている。 Generally, in order to reduce nitrogen oxides ( NO There are fuels with relatively good combustibility, such as blast furnace gas or petroleum coke supplied from steel plants, which have low volatile content and are inferior in combustibility. In the lineage
Even if an exhaust gas mixing device is installed to reduce NO A device is installed to mix exhaust gas to the extent that combustibility is not impaired.
第１図は、燃焼性の良い燃料の空気系統にのみ
排ガス混合装置を設置した場合の従来例を示す。 FIG. 1 shows a conventional example in which an exhaust gas mixing device is installed only in the air system for fuel with good combustibility.
第１図において、１はボイラ燃焼室を示し、燃
焼用空気２はダクト３の途中に設けられた空気量
監視のためのベンチユリ４を通り、その後燃焼性
の良い燃料の空気系統５と燃焼性の劣る燃料の空
気系統６とに分岐されている。 In Fig. 1, reference numeral 1 indicates a boiler combustion chamber, and combustion air 2 passes through a bench lily 4 for monitoring the amount of air installed in the middle of a duct 3, and then connects to an air system 5 for fuel with good combustibility. It is branched into an air system 6 with inferior fuel.
燃焼性の良い燃料の空気系統５には排ガス混合
装置７が設置され、ここで燃焼性の良い燃料のた
めの燃焼空気２ａは排ガス送風フアン８より導か
れた燃焼排ガス９と混合され、この混合体が空気
系統５を経てそのバーナ空気コンパートメント１
０よりボイラ燃焼室１へ燃焼性の良い燃料と共に
投入される。 An exhaust gas mixing device 7 is installed in the air system 5 for the fuel with good combustibility, in which the combustion air 2a for the fuel with good combustibility is mixed with the combustion exhaust gas 9 guided from the exhaust gas blowing fan 8, and this mixture The body passes through the air system 5 to its burner air compartment 1
0 into the boiler combustion chamber 1 along with fuel with good combustibility.
一方、燃焼性の劣る燃料のための燃焼空気２ｂ
は排ガス混合装置７を通過することなしに空気系
統６を経てそのバーナ空気コンパートメント１１
よりボイラ燃焼室１へ燃焼性の劣る燃料の共に投
入される。 On the other hand, combustion air 2b for fuel with poor combustibility
passes through the air system 6 to its burner air compartment 11 without passing through the exhaust gas mixing device 7.
Therefore, fuel with inferior combustibility is also injected into the boiler combustion chamber 1.
第２図は、燃焼性の劣る燃料の空気系統にも排
ガス混合装置を設けて、燃焼性を損わない程度に
排ガスを混入させ、より積極的にNOX低減をは
かるようにした従来例を示す。 Figure 2 shows a conventional example in which an exhaust gas mixing device is also installed in the air system for fuel with poor combustibility, and exhaust gas is mixed in to an extent that does not impair combustibility, in order to more actively reduce NOx . show.
第２図において、第１図に示したものと同一の
要素には同一の参照符号を付してその詳細な説明
は省略するが、燃焼性の劣る燃料の空気系統６の
途中にも排ガス混合装置１２が設置されている。 In FIG. 2, elements that are the same as those shown in FIG. 1 are given the same reference numerals and their detailed explanations are omitted. A device 12 is installed.
しかして、排ガス混合フアン８から導かれた燃
焼排ガス９がダンパ１３及び１４を経てそれぞれ
燃焼性の良い燃料のため燃焼空気２ａ及び燃焼性
の劣る燃料のための燃焼空気２ｂと混合せられ
る。ダンパ１３及び１４は、燃焼性を確保しなが
ら、排ガス注入量を調整するものである。 Thus, the combustion exhaust gas 9 led from the exhaust gas mixing fan 8 passes through the dampers 13 and 14 and is mixed with combustion air 2a for fuel with good combustibility and combustion air 2b for fuel with poor combustibility, respectively. The dampers 13 and 14 adjust the amount of exhaust gas injected while ensuring combustibility.
しかしながら、このような第２図に示した従来
例は、燃焼性の良い燃料及び燃焼性の劣る燃料の
両空気系統５及び６にそれぞれ排ガス混合装置７
及び１２を設置しているため、その排ガス供給系
統の構成が複雑でかつ高価となつている。 However, in the conventional example shown in FIG.
and 12, the structure of the exhaust gas supply system is complicated and expensive.
本考案は、このような従来の問題を解消するた
めになされたもので、燃料混焼ボイラの燃焼空気
供給装置における排ガス供給系統の構成をシンプ
ルにし、かつ簡単な操作で運用上の機能を満足さ
せるようにしたものである。 The present invention was developed to solve these conventional problems, and it simplifies the configuration of the exhaust gas supply system in the combustion air supply system of a fuel co-combustion boiler and satisfies operational functions with simple operation. This is how it was done.
すなわち、本考案によれば、燃焼性の良い燃料
の空気系統にのみ排ガス混合装置を設置し、この
排ガス混合装置の後流側でこの燃焼性の良い燃料
の空気系統を燃焼性の劣る燃料の空気系統に連絡
するとともに、この連絡部に調整ダンパを設ける
ことにより、排ガス供給系統の構成をシンプルに
し、かつ簡単な操作で運用上の機能を満足させる
ようにしたものである。 That is, according to the present invention, an exhaust gas mixing device is installed only in the air system for fuel with good combustibility, and on the downstream side of this exhaust gas mixing device, the air system for fuel with good combustibility is connected to the air system for fuel with poor combustibility. By communicating with the air system and providing an adjustment damper in this communication section, the configuration of the exhaust gas supply system is simplified and the operational functions are satisfied with simple operation.
以下図面を参照して本考案の好適な一実施例に
ついて詳述する。 A preferred embodiment of the present invention will be described in detail below with reference to the drawings.
第３図において、第１図に示したものと同一の
要素には同一の参照符号を付してその詳細な説明
は省略するが、この第３図に示す燃焼空気系統は
第１図に示した従来例における燃焼性の良い燃料
の空気系統５と燃焼性の劣る燃料の空気系統６と
を空気系統５に設置している排ガス混合装置７の
後流側で連絡するとともに、この連絡部に調整ダ
ンパ１５を設置し、この調整ダンパの開度を変え
ることにより、燃焼性の劣る燃料の空気系統６の
排ガス混合比率を、０から燃焼性の良い燃料の空
気系統５の排ガス混合率と同じ値までの範囲で、
調整することが出来るようにしている。 In FIG. 3, elements that are the same as those shown in FIG. 1 are given the same reference numerals and detailed explanations thereof are omitted. In the conventional example, the air system 5 for fuel with good combustibility and the air system 6 for fuel with poor combustibility are connected on the downstream side of the exhaust gas mixing device 7 installed in the air system 5, and this communication part is connected. By installing the adjustment damper 15 and changing the opening degree of this adjustment damper, the exhaust gas mixture ratio of the air system 6 for fuel with poor combustibility can be changed from 0 to the same as the exhaust gas mixture ratio of the air system 5 for fuel with good combustibility. In the range up to the value
This allows for adjustments to be made.
したがつて、このような構成によれば、第２図
で示した従来例の如く燃焼性の良い燃料及び燃焼
性の劣る燃料のそれぞれの空気系統５及び６に排
ガス混合装置を設置せずに、排ガス混合装置７は
燃焼性の良い燃料の燃焼空気系統５側にのみ設置
しているので、排ガス供給系統の構成をシンプル
にすることができる。また、調整ダンパ１５を燃
料の運用状況に応じて操作し、燃焼性の劣る燃料
側の空気系統６の燃焼性を損わない程度に排ガス
を混入させることにより、NOXの上昇を抑える
ことができる。 Therefore, with such a configuration, it is not necessary to install an exhaust gas mixing device in the air systems 5 and 6 for the fuel with good combustibility and the fuel with poor combustibility, as in the conventional example shown in FIG. Since the exhaust gas mixing device 7 is installed only on the side of the combustion air system 5 for fuel with good combustibility, the configuration of the exhaust gas supply system can be simplified. In addition, by operating the adjustment damper 15 according to the fuel operating conditions and mixing the exhaust gas to an extent that does not impair the combustibility of the air system 6 on the fuel side, which has poor combustibility, it is possible to suppress the increase in NOx . can.
第４図は、第３図に示した調整ダンパ１５の部
分の具体的構成の一例を示す。 FIG. 4 shows an example of a specific configuration of the adjustment damper 15 shown in FIG.
第４図において、燃焼性の良い燃料の空気系統
５と燃焼性の劣る燃料の空気系統６とは仕切板１
６で分割されたダクト３により形成され、この仕
切板１６に調整ダンパ１５が設けられている。 In FIG. 4, the air system 5 for fuel with good combustibility and the air system 6 for fuel with poor combustibility are separated by the partition plate 1.
It is formed by a duct 3 divided into 6, and an adjustment damper 15 is provided on this partition plate 16.
この調整ダンパ１５は第４図に示す状態では完
全に閉じられており、したがつて排ガス混合装置
７により注入された燃焼排ガス９と燃焼性の良い
燃料のための燃焼空気２ａとの混合体１７は空気
系統５のみを流れ、燃焼性の劣る燃料のための燃
焼空気２ｂは排ガス９と混合することなく空気系
統６を流れる。 This adjusting damper 15 is completely closed in the state shown in FIG. 4, so that a mixture 17 of combustion exhaust gas 9 injected by the exhaust gas mixing device 7 and combustion air 2a for a highly combustible fuel is formed. flows only through the air system 5, and combustion air 2b for fuel with poor combustibility flows through the air system 6 without mixing with the exhaust gas 9.
第５図は調整ダンパ１５が中間開度に設定され
ている状態を示し、したがつて空気系統５を流れ
る燃焼空気２ａと排ガス９との混合体１７の一部
１７ａが燃焼性の劣る燃料のための燃焼空気２ｂ
に混合するので、空気系統５を流れる混合体１７
ｂよりも排ガス混合比率の低い燃焼空気（混合
体）１７ｃが空気系統６を流れる。 FIG. 5 shows a state in which the adjustment damper 15 is set to an intermediate opening degree, so that a portion 17a of the mixture 17 of combustion air 2a and exhaust gas 9 flowing through the air system 5 is filled with fuel with poor combustibility. combustion air 2b for
The mixture 17 flowing through the air system 5
Combustion air (mixture) 17c having a lower exhaust gas mixture ratio than b flows through the air system 6.
第６図は調整ダンパ１５が完全に開いている状
態を示し、したがつて燃焼性の劣る燃料のための
燃焼空気２ｂは遮断され、燃焼性の良い燃料のた
めの燃焼空気と排ガスとの混合体１７の一部１７
ａが空気系統６に流入するので、同じ排ガス混合
比率の燃焼空気（混合体）１７ａ及び１７ｂがそ
れぞれ空気系統５及び６を流れる。 FIG. 6 shows a state in which the adjustment damper 15 is completely opened, so that the combustion air 2b for the fuel with poor combustibility is cut off, and the combustion air 2b for the fuel with good combustibility is mixed with the exhaust gas. Part 17 of body 17
a flows into the air system 6, combustion air (mixture) 17a and 17b having the same exhaust gas mixture ratio flow through the air systems 5 and 6, respectively.
第７図は他の変形例を示し、前述した調整ダン
パ１５に加え、燃焼性の劣る燃料の空気系統６の
調整ダンパ１５上流側に他の調整ダンパ１８を設
置し、調整ダンパ１５の中間開度の状態で、排ガ
スと燃焼空気との混合体１７の一部１７ａが燃焼
性の劣る燃料の空気系統６に流入しにくい場合
に、この調整ダンパ１８を絞り込むことによつ
て、混合体１７ａが流入しやすくしたものであ
る。 FIG. 7 shows another modification example in which, in addition to the above-mentioned adjustment damper 15, another adjustment damper 18 is installed upstream of the adjustment damper 15 in the air system 6 for fuel with poor combustibility, and an intermediate adjustment damper 18 is installed. When a part 17a of the mixture 17 of exhaust gas and combustion air is difficult to flow into the air system 6 of fuel with poor combustibility under the condition of This made it easier for people to enter the country.
第１図及び第２図は従来の燃料混焼ボイラの燃
焼空気供給装置の二例を示す図、第３図は本考案
による燃料混焼ボイラの燃焼空気供給装置の一例
を示す図、第４図は第３図に示した調整ダンパ部
分の具体的構成の一例を示す図、第５図及び第６
図はこの調整ダンパの作用を説明するための図、
第７図は調整ダンパ部分の他の構成例を示す図で
ある。
１……ボイラ燃焼室、２，２ａ，２ｂ……燃焼
空気、５……燃焼性の良い燃料の空気系統、６…
…燃焼性の劣る燃料の空気系統、７……排ガス混
合装置、９……燃焼排ガス、１５……調整ダン
パ、１７，１７ａ，１７ｂ，１７ｃ……燃焼空気
と排ガスとの混合体。
1 and 2 are diagrams showing two examples of conventional combustion air supply devices for a fuel mixed combustion boiler, FIG. 3 is a diagram showing an example of a combustion air supply device for a fuel mixed combustion boiler according to the present invention, and FIG. 4 is a diagram showing an example of a combustion air supply device for a fuel mixed combustion boiler according to the present invention. A diagram showing an example of a specific configuration of the adjustment damper portion shown in FIG. 3, FIGS. 5 and 6.
The figure is a diagram to explain the action of this adjustment damper.
FIG. 7 is a diagram showing another example of the configuration of the adjustment damper portion. 1... Boiler combustion chamber, 2, 2a, 2b... Combustion air, 5... Air system for fuel with good combustibility, 6...
... Air system for fuel with poor combustibility, 7... Exhaust gas mixing device, 9... Combustion exhaust gas, 15... Adjustment damper, 17, 17a, 17b, 17c... Mixture of combustion air and exhaust gas.
Claims (1)
系統が燃焼性の良い燃料の空気系統と燃焼性の劣
る燃料の空気系統とに分けられている燃料混焼ボ
イラの燃焼空気供給装置において、燃焼性の良い
燃料の空気系統に排ガス混合装置を設置し、この
排ガス混合装置の後流側でこの燃焼性の良い空気
系統を燃焼性の劣る空気系統に連絡するととも
に、この連絡部に調整ダンパを設置したことを特
徴とする燃料混焼ボイラの燃焼空気供給装置。 In the combustion air supply system of a fuel mixed combustion boiler, where the combustion air system is divided into an air system for fuel with good combustibility and an air system for fuel with poor combustibility in order to co-combust two or more types of fuel, An exhaust gas mixing device was installed in the air system with good fuel, and the air system with good combustibility was connected to the air system with poor combustibility on the downstream side of this exhaust gas mixing device, and an adjustment damper was installed at this connection point. A combustion air supply device for a fuel mixed combustion boiler, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP756384U JPS60122647U (en) | 1984-01-25 | 1984-01-25 | Combustion air supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP756384U JPS60122647U (en) | 1984-01-25 | 1984-01-25 | Combustion air supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60122647U JPS60122647U (en) | 1985-08-19 |
| JPH025247Y2 true JPH025247Y2 (en) | 1990-02-08 |
Family
ID=30486026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP756384U Granted JPS60122647U (en) | 1984-01-25 | 1984-01-25 | Combustion air supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60122647U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6135377B2 (en) * | 2013-08-05 | 2017-05-31 | 三浦工業株式会社 | Exhaust gas recirculation burner and boiler equipped with the exhaust gas recirculation burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52122930A (en) * | 1976-04-08 | 1977-10-15 | Ishikawajima Harima Heavy Ind Co Ltd | Combustion furnace |
-
1984
- 1984-01-25 JP JP756384U patent/JPS60122647U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60122647U (en) | 1985-08-19 |
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