JPH0238170Y2 - - Google Patents
Info
- Publication number
- JPH0238170Y2 JPH0238170Y2 JP7903585U JP7903585U JPH0238170Y2 JP H0238170 Y2 JPH0238170 Y2 JP H0238170Y2 JP 7903585 U JP7903585 U JP 7903585U JP 7903585 U JP7903585 U JP 7903585U JP H0238170 Y2 JPH0238170 Y2 JP H0238170Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- fluidized bed
- fuel
- nozzle
- distribution plate
- 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
- 239000000446 fuel Substances 0.000 claims description 39
- 238000002485 combustion reaction Methods 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000003009 desulfurizing effect Effects 0.000 claims description 4
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052815 sulfur oxide Inorganic materials 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 description 8
- 230000023556 desulfurization Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000004449 solid propellant Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- -1 coalstone Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は流動層燃焼装置に関し、特に流動層内
に脱硫剤を存在させて、燃料（被焼却物）の燃焼
に伴い発生する硫黄酸化物を除去する流動層燃焼
装置に関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to a fluidized bed combustion apparatus, and in particular, the present invention relates to a fluidized bed combustion apparatus, in which a desulfurizing agent is present in the fluidized bed, and sulfur oxides generated as a result of combustion of fuel (material to be incinerated) are removed. The present invention relates to a fluidized bed combustion apparatus that removes .
（従来の技術と問題点）
第２図は従来の流動層燃焼炉の側断面図であ
る。流動層燃焼炉１の下部にはウインドボツクス
３が設けられ、該ウインドボツクス３には空気ダ
クト４から流動層の流動と燃料の燃焼に必要な空
気（燃焼排ガスを混合することがある）が供給さ
れる。ウインドボツクス３の上部には空気供給ノ
ズル８を備えた空気分散板７が設けられ、流動層
２に空気が供給される。流動層は砂のような耐熱
材の粒子で構成され、被燃焼物の燃焼によつて発
生する燃焼ガス中の硫黄酸化物を除する場合は、
石炭石のようなCa化合物を含む脱硫剤粒子が砂
のような耐火材粒子とともに使用され、流動層の
構成物の一部をなしている。(Prior Art and Problems) FIG. 2 is a side sectional view of a conventional fluidized bed combustion furnace. A wind box 3 is provided at the bottom of the fluidized bed combustion furnace 1, and air (which may be mixed with combustion exhaust gas) necessary for fluidizing the fluidized bed and burning the fuel is supplied to the wind box 3 from an air duct 4. be done. An air distribution plate 7 equipped with an air supply nozzle 8 is provided above the wind box 3, and air is supplied to the fluidized bed 2. The fluidized bed is composed of particles of heat-resistant material such as sand, and is used to remove sulfur oxides from the combustion gas generated by the combustion of materials to be combusted.
Desulphurizing agent particles containing Ca compounds, such as coalstone, are used along with refractory particles, such as sand, and form part of the fluidized bed composition.
石炭粒子のような燃料は、燃料供給管５から燃
料供給ノズル６を経て流動層中に供給される。石
炭粒子を燃料とする場合は、石炭は搬送用ガス体
に搬送されて流動層中にノズル６から噴出され
る。 Fuel such as coal particles is supplied into the fluidized bed from a fuel supply pipe 5 through a fuel supply nozzle 6. When coal particles are used as fuel, the coal is conveyed by a conveying gas body and ejected from the nozzle 6 into the fluidized bed.
第２図のような流動層燃焼装置の空気分散板を
上からみた図（すなわち、Ａ−Ａ視図）を第３図
に示す、空気分散板７にはほぼ均一に空気ノズル
８が分布するように配置されている。燃料ノズル
６は空気ノズル８に比して数が少ない。 FIG. 3 shows a top view (i.e., A-A view) of the air distribution plate of the fluidized bed combustion apparatus shown in FIG. 2. Air nozzles 8 are distributed almost uniformly on the air distribution plate 7. It is arranged like this. The number of fuel nozzles 6 is smaller than that of air nozzles 8.
流動層燃焼装置の燃料供給を気流搬送方式とす
る場合（例えば固形炭素分を空気によつて燃料配
管によつて搬送する場合）、流動層内へ吹込む燃
料供給ノズルの本数は、燃焼性能および系統の簡
略化を考えて、例えば流動層の平面積1.2m2当た
り１本配置される。 When supplying fuel to a fluidized bed combustion apparatus using an air flow conveyance method (for example, when solid carbon is conveyed by air through fuel piping), the number of fuel supply nozzles injected into the fluidized bed depends on combustion performance and In order to simplify the system, for example, one tube is placed per 1.2 m 2 of flat area of the fluidized bed.
固体燃料を気流搬送する場合、固気化（固体燃
料重量／搬送気体重量）を高くとつて高濃度輸送
方式を採用すると、燃料供給管の管直径も小さく
なり、多数を空気分散板に配置する立場からみれ
ば、配管事がしやすく、価格も安くできる。しか
し、第３図に示したように、空気分散板に空気ノ
ズルを均一に取付けて、流動層の平面あたり均一
に空気を供給する方式においては、燃料ノズル取
付部付近において、燃料過多、すなわち、燃料の
燃焼に必要とされる空気量より過少の空気しか供
給されず、燃焼性能が低下するだけでなく、流動
層燃焼炉内の炉内脱硫率が下がる。 When solid fuel is transported by air flow, if a high concentration transport method is adopted by increasing the solidification (solid fuel weight/carried gas weight), the diameter of the fuel supply pipe will also become smaller, making it difficult to arrange a large number of fuel pipes on the air distribution plate. From this point of view, plumbing is easier and cheaper. However, as shown in FIG. 3, in a method in which air nozzles are uniformly attached to an air distribution plate and air is supplied uniformly to the plane of the fluidized bed, there is an excess of fuel in the vicinity of the fuel nozzle attachment part. Less air is supplied than the amount of air required for fuel combustion, which not only reduces combustion performance but also reduces the in-furnace desulfurization rate in the fluidized bed combustion furnace.
流動媒体内にCaCO3ないしCaOを混在させて、
燃料の燃焼にともなつて出てくるSO2を除去する
炉内脱硫方式では次式のような反応が行なわれ
る。 By mixing CaCO 3 or CaO in the fluid medium,
In the in-furnace desulfurization method, which removes SO 2 released as fuel is burned, the following reaction takes place.
CaO＋SO2＋１／2O2→CaSO4
すなわち、流動層内へ燃料を吹込む燃料ノズル
付近で、燃焼用空気が不足することは、燃料の燃
焼により発生するSO2ガスをCaOなる脱硫剤で除
去する脱硫反応が十分に行なえないことになる。 CaO + SO 2 + 1/2O 2 →CaSO 4 In other words, the lack of combustion air near the fuel nozzle that injects fuel into the fluidized bed means that the SO 2 gas generated by fuel combustion is removed by a desulfurizing agent called CaO. This means that the desulfurization reaction cannot be carried out sufficiently.
特に、燃料と脱硫剤を一緒に混ぜて同一配管で
気流搬送すれば、多数の配管が取付けられる空気
分散板の構造が簡略になるので注目されている
が、若しこの方法を採用し、燃料ノズルから燃料
と脱硫剤を一緒に流動層内に噴射した場合、燃料
ノズル付近での空気不足により、脱硫が十分に行
なえない場合を生じる。 In particular, if fuel and desulfurization agent are mixed together and transported by air through the same pipe, it is attracting attention because the structure of the air distribution plate to which many pipes are attached can be simplified. When fuel and desulfurization agent are injected together into a fluidized bed from a nozzle, desulfurization may not be carried out sufficiently due to lack of air near the fuel nozzle.
本考案の目的は、上記従来技術の欠点をなく
し、脱硫を充分に行なえるように燃料ノズル付近
の空気量を多く供給することができる流動層燃焼
装置を提供することにある。 It is an object of the present invention to provide a fluidized bed combustion apparatus that eliminates the drawbacks of the prior art described above and can supply a large amount of air near the fuel nozzle so as to perform sufficient desulfurization.
（問題点を解決するための手段）
本考案は、空気分散板における燃料ノズル取付
位置付近での空気ノズルからの空気吹出量を増加
するようにしたものである。すなわち、本考案
は、ウインドボツクス上部に空気分散板を設け、
該分散板上方には流動媒体と脱硫剤よりなる流動
層を形成し、流動層で燃料を燃焼させるととも
に、燃焼ガス中の硫黄酸化物を除去する如くなし
た流動層燃焼装置において、上部分散板上には空
気ノズルと燃料ノズルを設けるとともに、燃料ノ
ズルを設けた領域の空気ノズルの開口面積を、そ
の領域以外の空気ノズルの開口面積より大きくし
たことを特徴とする。(Means for Solving the Problems) The present invention is designed to increase the amount of air blown from the air nozzles near the fuel nozzle mounting position on the air distribution plate. That is, the present invention provides an air distribution plate at the top of the wind box,
In a fluidized bed combustion apparatus in which a fluidized bed made of a fluidized medium and a desulfurizing agent is formed above the dispersion plate, the fuel is combusted in the fluidized bed, and sulfur oxides in the combustion gas are removed. An air nozzle and a fuel nozzle are provided on the top, and the opening area of the air nozzle in the area where the fuel nozzle is provided is larger than the opening area of the air nozzle in other areas.
（考案の実施例）
第１図に本考案の一実施例を示す。空気分散板
７を貫通して取付けられた燃料ノズル６付近の点
線で囲んだ領域内に配置された空気ノズル８ｂ
は、第１ｂ図に示すように空気噴射口を２段に設
けているが、点線で囲んだ以外の領域の空気ノズ
ルは第１ａ図のように空気ノズルの噴射孔が一段
に設けられている。上記実施例では噴射孔の数を
増した空気ノズルを燃料ノズル付近に取付ける例
を示したが、この外に噴射孔の直径を大きくした
り、または空気ノズルの分散板への取付密度を増
すなどしたり、また、それらを組合わせるなどの
方法があるが、いずれも本考案に含まれる。(Embodiment of the invention) FIG. 1 shows an embodiment of the invention. Air nozzle 8b arranged in the area surrounded by the dotted line near the fuel nozzle 6 installed through the air distribution plate 7
The air nozzle is provided in two stages as shown in Figure 1b, but the air nozzles in the area other than the area surrounded by the dotted line are provided in one stage as shown in Figure 1a. . The above example shows an example in which an air nozzle with an increased number of injection holes is installed near the fuel nozzle, but it is also possible to increase the diameter of the injection hole or increase the density of air nozzles attached to the distribution plate. There are methods to do this, or to combine them, but both are included in the present invention.
（考案の効果）
本考案によれば、燃料ノズル付近の空気不足を
生じることがないので、流動層燃焼装置内におけ
る炉内脱硫性能を上げることができ、かつ、燃料
の燃焼性能も向上させることができる。本考案
は、特に、固体燃料の高濃度気流搬送方式による
流動層内への燃料吹込みを行なう場合に有効であ
る。(Effects of the invention) According to the invention, since there is no air shortage near the fuel nozzle, the in-furnace desulfurization performance in the fluidized bed combustion apparatus can be improved, and the fuel combustion performance can also be improved. Can be done. The present invention is particularly effective when injecting solid fuel into a fluidized bed using a high-concentration airflow conveyance system.
第１図は本考案の一実施例を示す図、第１ａ図
は燃料ノズルから離れた領域の空気分散板に取付
ける空気ノズルを示す図、第１ｂ図は燃料ノズル
取付近傍の領域の空気分散板に取付ける空気ノズ
ルを示す図、第２図は従来の流動層燃焼炉の側断
面図である。
１……流動層燃焼炉、６……燃料ノズル、７…
…空気分散板、８……空気ノズル、８ａ……燃料
ノズルから離れた領域の空気ノズル、８ｂ……燃
料ノズル取付位置付近の空気ノズル。
Fig. 1 shows an embodiment of the present invention, Fig. 1a shows an air nozzle attached to an air distribution plate in an area away from the fuel nozzle, and Fig. 1b shows an air distribution plate in an area near the fuel nozzle. Figure 2 is a side sectional view of a conventional fluidized bed combustion furnace. 1... Fluidized bed combustion furnace, 6... Fuel nozzle, 7...
...Air distribution plate, 8...Air nozzle, 8a...Air nozzle in an area away from the fuel nozzle, 8b...Air nozzle near the fuel nozzle mounting position.
Claims (1)
分散板上方には流動媒体と脱硫剤よりなる流動層
を形成し、流動層で燃料を燃焼させるとともに、
燃焼ガス中の硫黄酸化物を除去する如くなした流
動層燃焼装置において、上部分散板上には空気ノ
ズルと燃料ノズルを設けるとともに、燃料ノズル
を設けた領域の空気ノズルの開口面積を、その領
域以外の空気ノズルの開口面積より大きくしたこ
とを特徴とする流動層燃焼装置。 An air dispersion plate is provided above the wind box, a fluidized bed made of a fluidized medium and a desulfurizing agent is formed above the dispersion plate, and the fuel is combusted in the fluidized bed.
In a fluidized bed combustion apparatus designed to remove sulfur oxides from combustion gas, an air nozzle and a fuel nozzle are provided on the upper distribution plate, and the opening area of the air nozzle in the area where the fuel nozzle is provided is A fluidized bed combustion apparatus characterized in that the opening area of the air nozzle is larger than that of other air nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7903585U JPH0238170Y2 (en) | 1985-05-27 | 1985-05-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7903585U JPH0238170Y2 (en) | 1985-05-27 | 1985-05-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61198810U JPS61198810U (en) | 1986-12-12 |
| JPH0238170Y2 true JPH0238170Y2 (en) | 1990-10-16 |
Family
ID=30623569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7903585U Expired JPH0238170Y2 (en) | 1985-05-27 | 1985-05-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0238170Y2 (en) |
-
1985
- 1985-05-27 JP JP7903585U patent/JPH0238170Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61198810U (en) | 1986-12-12 |
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