JPS6160322B2 - - Google Patents
Info
- Publication number
- JPS6160322B2 JPS6160322B2 JP11773478A JP11773478A JPS6160322B2 JP S6160322 B2 JPS6160322 B2 JP S6160322B2 JP 11773478 A JP11773478 A JP 11773478A JP 11773478 A JP11773478 A JP 11773478A JP S6160322 B2 JPS6160322 B2 JP S6160322B2
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- flue
- air
- furnace
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 28
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 24
- 239000000567 combustion gas Substances 0.000 description 10
- 239000000446 fuel Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 241000766026 Coregonus nasus Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/005—Fluidised bed combustion apparatus comprising two or more beds
-
- 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
- F23C6/02—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in parallel arrangement
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Incineration Of Waste (AREA)
Description
【発明の詳細な説明】
本発明は、流動床燃焼装置に関する。従来の流
動床燃焼装置を第１図、第２図に基づいて説明す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluidized bed combustion apparatus. A conventional fluidized bed combustion apparatus will be explained based on FIGS. 1 and 2.
上下の仕切り８と炉壁６と分割壁２０とにより
囲まれて12個の流動床燃焼炉が形成され、流動床
燃焼炉は空気分配板３で空気箱４と流動床１とに
分けられ、流動床１の上部にはフリーボード２が
設けられている。フリーボード２は共通煙道１０
と炉の巾にわたつて分割壁２０に設けられた連絡
孔７と結ばれていて、共通煙道１０は煙道底９、
天井１１、煙道壁１２から形成されている。炉壁
６には空気管１４と連通した二次空気ノズル１３
が配置されている。 Twelve fluidized bed combustion furnaces are formed by being surrounded by upper and lower partitions 8, furnace walls 6, and dividing walls 20, and the fluidized bed combustion furnaces are divided into an air box 4 and a fluidized bed 1 by an air distribution plate 3. A freeboard 2 is provided above the fluidized bed 1. Free board 2 is common flue 10
and a communication hole 7 provided in the dividing wall 20 across the width of the furnace, and the common flue 10 has a flue bottom 9,
It is formed from a ceiling 11 and a flue wall 12. A secondary air nozzle 13 communicating with an air pipe 14 is provided on the furnace wall 6.
is located.
流動床１内に供給される燃料は空気箱４、分配
板３より供給される量論量以上の空気で燃焼し、
燃焼ガスはフリーボード２、連絡孔７を経て共通
煙道１０に排出される。 The fuel supplied into the fluidized bed 1 is combusted with more than the stoichiometric amount of air supplied from the air box 4 and the distribution plate 3,
The combustion gas is discharged into the common flue 10 through the freeboard 2 and the communication hole 7.
通常燃料中には１〜２％の窒素が含まれてお
り、空気と撹拌燃焼される流動床内ではかなりの
NOx（窒素酸化物）が発生する。 Normally, fuel contains 1 to 2% nitrogen, and in a fluidized bed where it is stirred and burned with air, a considerable amount of nitrogen is contained.
NOx (nitrogen oxides) is generated.
NOxの抑制のため分配板３からの空気量を減
らし、フリーボード２に微粉燃料粒子を含む空気
を吹き込む方法が行われているが、この方法の欠
点は燃焼ガスとノズル１３からの空気が速かに均
一に混合しにくく、ノズル１３からの空気による
NOxの発生が少なくない事、及びフリーボード
２を高くする必要がある事である。従つてフリー
ボード２に空気を吹き込む手法は第１図に示すよ
うな大型の縦型装置には適用し難い。 In order to suppress NOx, a method has been used to reduce the amount of air from the distribution plate 3 and blow air containing pulverized fuel particles into the freeboard 2. However, the disadvantage of this method is that the combustion gas and air from the nozzle 13 are It is difficult to mix uniformly, and the air from the nozzle 13
There is a considerable amount of NOx generated and it is necessary to make the freeboard 2 higher. Therefore, the method of blowing air into the freeboard 2 is difficult to apply to a large vertical device as shown in FIG.
更に、２次空気の流れが流動床１の表面にも達
する可能性がありNOxの異常な発生の危惧もあ
る。 Furthermore, there is a possibility that the flow of secondary air may reach the surface of the fluidized bed 1, and there is a risk of abnormal generation of NOx.
そこで本発明は、NOxの発生を抑制した流動
床燃焼装置を提供することを目的としてなされた
ものである。 Therefore, the present invention has been made with the object of providing a fluidized bed combustion apparatus that suppresses the generation of NOx.
次に本発明を第３図ないし第５図に示す第１の
実施例に基づいて具体的に説明する。 Next, the present invention will be specifically explained based on a first embodiment shown in FIGS. 3 to 5.
上下の仕切り８と炉壁６と分割壁とに囲まれて
上下６段と横２列の12個の流動床燃焼炉が形成さ
れ、流動床燃焼炉は、空気分配板３で空気箱４と
流動床１とに分けられ、流動床１の上部にフリー
ボード２が設けられている。流動床燃焼炉に隣接
して煙道底９、天井１１、分割壁２０及び煙道壁
１２で形成された共通煙道１０が配置されてい
る。共通煙道１０の上部は、流動床燃焼炉より高
くなつていて空間１６が形成されている。共通煙
道１０との境界となつている分割壁２０には、共
通煙道１０内のほぼ中央部に仮想円１７を想定し
その仮想内１７に接するようにすなわち共通煙道
１０内にうず流を形成するようにフリーボード２
内の燃焼ガスを吹き込むよう分割壁２０の炉壁６
近傍から共通煙道１０のほぼ中心方向に向つて開
口した吹出し孔としての連絡孔１８を設け、炉壁
６には連絡孔１８内に二次空気を吹き込むように
空気ノズル１９が、又、煙道壁１２にも、仮想円
１７に接するように二次空気を吹き込む空気ノズ
ル１９が設けられている。 Surrounded by the upper and lower partitions 8, the furnace wall 6, and the dividing wall, 12 fluidized bed combustion furnaces are formed in 6 upper and lower stages and 2 horizontal rows. A freeboard 2 is provided above the fluidized bed 1. A common flue 10 formed by a flue bottom 9, a ceiling 11, a dividing wall 20 and a flue wall 12 is arranged adjacent to the fluidized bed combustion furnace. The upper part of the common flue 10 is higher than the fluidized bed combustion furnace to form a space 16. In the dividing wall 20 that is the boundary with the common flue 10, an imaginary circle 17 is assumed at approximately the center of the common flue 10, and a swirling flow is formed in the common flue 10 so as to be in contact with the imaginary circle 17. Free board 2 to form
Furnace wall 6 of dividing wall 20 so as to blow combustion gas inside
A communication hole 18 is provided as a blow-off hole that opens from the vicinity toward the center of the common flue 10, and an air nozzle 19 is provided in the furnace wall 6 to blow secondary air into the communication hole 18. The road wall 12 is also provided with an air nozzle 19 that blows secondary air so as to be in contact with the virtual circle 17.
各流動床炉は窒素酸化物抑制の為、投入燃料量
に見合う量論量よりやや少ない空気を空気箱４か
ら空気分配板３を介して流動床１に供給して燃焼
させる。発生する燃焼ガスは可燃分を含んでお
り、これを連絡孔１８を経て、共通煙道１０に導
かれる。 In order to suppress nitrogen oxides, each fluidized bed furnace supplies air slightly less than the stoichiometric amount corresponding to the amount of input fuel from the air box 4 to the fluidized bed 1 via the air distribution plate 3 for combustion. The generated combustion gas contains combustible matter, and is led to the common flue 10 through the communication hole 18.
炉内に設けた空気ノズル１９からの流れと炉燃
焼ガスは連絡孔１８中で混合しながら仮想内１７
に向けて吹出される。 The flow from the air nozzle 19 provided in the furnace and the furnace combustion gas are mixed in the communication hole 18 while flowing into the virtual interior 17.
It is blown out towards.
共通煙道１０に設ける空気ノズル１９の空気も
仮想円１７に向けられており、共通煙道１０に吹
き込まれるガス空気が急速に混合し、可燃分を焼
却する。 The air of the air nozzles 19 provided in the common flue 10 is also directed towards the virtual circle 17, so that the gaseous air blown into the common flue 10 mixes rapidly and burns out the combustibles.
流動床炉より発生する可燃分と空気をうず流を
作つて急速混合燃焼させることにより、この部分
の燃焼により発生するNOxを低く抑え、（かんま
ん混合燃焼ではNOxは多発する）煙道内に吹き
込む空気に混入した石炭・チヤー、CaOを含む流
動材等の微粉をも燃焼ガスに均一に急速に混合で
き、それらのNOx、SOx抑制効果を有効に発揮さ
せうる等の効果が得られる。 By creating a swirling flow of combustible matter and air generated by a fluidized bed furnace and causing rapid mixing and combustion, NOx generated by combustion in this part is kept low (nox is generated frequently in simple mixed combustion) and is blown into the flue. Fine particles such as coal, chir, and fluid materials containing CaO mixed in the air can be uniformly and rapidly mixed into the combustion gas, and effects such as being able to effectively exert their NOx and SOx suppressing effects can be obtained.
次に本発明を第６図及び第７図に示す第２の実
施例に基づいて説明する。 Next, the present invention will be explained based on a second embodiment shown in FIGS. 6 and 7.
第２の実施例は第１の実施例の装置において煙
道壁１２の空気ノズル１９を除き、その煙道壁１
２の部分にさらに流動床燃焼炉を配置した、すな
わち、共通煙道１０をはさんで両側に流動床燃焼
炉を配置したものであり、その他例えば、空気ノ
ズル１９、連絡孔１８の配置は第１の実施例のそ
れと同じように、共通煙道１２内の仮想円１７に
接するように二次空気、燃焼ガスを吹き込むよう
に配置されたものである。作用効果については、
第２の実施例も第１の実施例と同じであり、ここ
ではその説明は省略する。 The second embodiment is the same as that of the first embodiment except that the air nozzle 19 of the flue wall 12 is removed.
A fluidized bed combustion furnace is further arranged in the section 2, that is, a fluidized bed combustion furnace is arranged on both sides of the common flue 10, and the arrangement of the air nozzle 19 and communication hole 18 is As in the first embodiment, the secondary air and combustion gas are arranged so as to be in contact with the virtual circle 17 within the common flue 12. Regarding the effects,
The second embodiment is also the same as the first embodiment, and its explanation will be omitted here.
以上本発明を実施例に基づいて具体的に説明し
たが本発明はこれらの実施例だけに限定されるも
のではなく、本発明は流動床燃焼炉の側部に流動
床燃焼炉のフリーボード部と連通して設けられ、
上部方向に延る煙道をもつ流動床燃焼装置におい
て、燃焼炉と煙道とを区画する分割壁に燃焼炉と
煙道とを連通する吹出し孔を開口させると共に吹
出し孔を煙道の中心へ仮想した円の接線方向に向
け、燃焼炉の壁部に取り付けた二次空気流入用の
空気ノズルを吹出し孔に向けて配置したことを特
徴とする流動床燃焼装置を提供するものである。 Although the present invention has been specifically described above based on Examples, the present invention is not limited to these Examples. established in communication with
In a fluidized bed combustion device having a flue extending upward, an air outlet is opened in a dividing wall that separates the combustion furnace and the flue, and the air outlet is moved to the center of the flue. The present invention provides a fluidized bed combustion apparatus characterized in that an air nozzle for inflowing secondary air attached to a wall of a combustion furnace is arranged to face a blowout hole in the tangential direction of an imaginary circle.
本発明の装置によれば、流動床で空気量を少な
くして燃焼させ、未燃分を含む燃焼ガスをフリー
ボードから煙道に導き、煙道内で燃料、流動材の
微粉をもつ二次空気とともにうず流を作るように
旋回させ急速に燃焼ガスと空気との混合を行い燃
焼させるので、二次燃焼によるNOx発生を抑
え、かつ、微粉によりNOx、SOxの抑制をさらに
高めることを可能にしたものである。 According to the device of the present invention, combustion is carried out in a fluidized bed with a reduced amount of air, combustion gas containing unburned components is guided from the freeboard to the flue, and in the flue, secondary air containing fine powder of fuel and fluidized material is The combustion gas is rapidly mixed with air and combusted by swirling the combustion gas to create an eddy flow, thereby suppressing the generation of NOx due to secondary combustion, and further increasing the suppression of NOx and SOx due to the use of fine powder. It is something.
第１図は従来の流動床燃焼装置の正面断面図、
第２図は第１図中−矢視図、第３図は本発明
の第１の実施例の正面断面図、第４図は第３図中
の−矢視図、第５図は第３図中の−矢視
図、第６図は第２の実施例の正面断面図、第７図
は第６図中の−矢視図である。
１……流動床、２……フリーボード、３……空
気分配板、４……空気箱、６……炉壁、７……連
絡孔、８……仕切り、９……煙道底、１０……共
通煙道、１１……天井、１２……煙道壁、１３…
…空気ノズル、１４……空気管、１６……空間、
１７……仮想円、１８……連絡孔、２０……分割
壁。
Figure 1 is a front sectional view of a conventional fluidized bed combustion apparatus.
2 is a view in the direction of the arrow in FIG. 1, FIG. 3 is a front sectional view of the first embodiment of the present invention, FIG. 4 is a view in the direction of the arrow in FIG. FIG. 6 is a front sectional view of the second embodiment, and FIG. 7 is a view taken along the - arrow in FIG. 6. 1... Fluidized bed, 2... Free board, 3... Air distribution plate, 4... Air box, 6... Furnace wall, 7... Communication hole, 8... Partition, 9... Flue bottom, 10 ... Common flue, 11 ... Ceiling, 12 ... Flue wall, 13 ...
...Air nozzle, 14...Air pipe, 16...Space,
17...virtual circle, 18...communication hole, 20...dividing wall.
Claims (1)
リーボード部と連通して設けられ、上部方向に延
る煙道を持つ流動床燃焼装置において、前記燃焼
炉と煙道とを区画する分割壁に該燃焼炉と煙道と
を連通する吹出し孔を開口させると共に該吹出し
孔を煙道の中心へ仮想した円の接線方向に向け、
前記燃焼炉の壁部に取り付けた二次空気流入用の
空気ノズルを前記吹出し孔に向けて配置したこと
を特徴とする流動床燃焼装置。1. In a fluidized bed combustion apparatus having a flue that is provided on the side of the fluidized bed combustion furnace in communication with the freeboard part of the fluidized bed combustion furnace and extends upward, the combustion furnace and the flue are separated. Opening a blow-off hole communicating the combustion furnace and the flue in the dividing wall, and directing the blow-off hole toward the center of the flue in a tangential direction of an imaginary circle;
A fluidized bed combustion apparatus characterized in that an air nozzle for inflowing secondary air attached to a wall of the combustion furnace is disposed toward the blowout hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11773478A JPS5543373A (en) | 1978-09-25 | 1978-09-25 | Fluidized-bed combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11773478A JPS5543373A (en) | 1978-09-25 | 1978-09-25 | Fluidized-bed combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5543373A JPS5543373A (en) | 1980-03-27 |
| JPS6160322B2 true JPS6160322B2 (en) | 1986-12-20 |
Family
ID=14718957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11773478A Granted JPS5543373A (en) | 1978-09-25 | 1978-09-25 | Fluidized-bed combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5543373A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006292318A (en) * | 2005-04-14 | 2006-10-26 | Hitachi Zosen Corp | Garbage incinerator |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710605U (en) * | 1980-06-17 | 1982-01-20 | ||
| DE3043254A1 (en) * | 1980-11-15 | 1982-07-08 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD FOR CLEANING NEUTRALIZED INDUSTRIAL WASTEWATER AND DEVICE FOR IMPLEMENTING THE METHOD |
| US5036343A (en) * | 1987-05-29 | 1991-07-30 | Asahi Kogaku Kogyo K.K. | Camera with side-mounted balancer |
| JP3513253B2 (en) * | 1995-04-11 | 2004-03-31 | 富士写真光機株式会社 | Wide-angle lens system |
-
1978
- 1978-09-25 JP JP11773478A patent/JPS5543373A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006292318A (en) * | 2005-04-14 | 2006-10-26 | Hitachi Zosen Corp | Garbage incinerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5543373A (en) | 1980-03-27 |
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