JP2621404B2 - Aeration tube structure of fluidized bed incinerator - Google Patents
Aeration tube structure of fluidized bed incineratorInfo
- Publication number
- JP2621404B2 JP2621404B2 JP20738288A JP20738288A JP2621404B2 JP 2621404 B2 JP2621404 B2 JP 2621404B2 JP 20738288 A JP20738288 A JP 20738288A JP 20738288 A JP20738288 A JP 20738288A JP 2621404 B2 JP2621404 B2 JP 2621404B2
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- air
- fluidized
- diffuser
- incinerator
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 [産業上の利用分野] 本発明は、流動層式焼却炉の散気管構造に関するもの
である。Description: TECHNICAL FIELD The present invention relates to a diffuser tube structure for a fluidized bed incinerator.
[従来の技術] 散気管から吹き込んだ流動化空気により、ごみや汚泥
ケーキ等の被焼却物と流動媒体とで流動層を形成させな
がら被焼却物を燃焼させる流動層式焼却炉が知られてい
る。[Prior Art] A fluidized bed incinerator is known which burns an incineration object while forming a fluidized bed with an incineration object such as refuse or sludge cake and a fluidized medium by fluidizing air blown from an air diffuser. I have.
流動層式焼却炉を第6図に基づいて説明する。 The fluidized bed incinerator will be described with reference to FIG.
第6図において、1は流動層式焼却炉、2は互いに間
隔を隔てて焼却炉1内にこれを横断して掛け渡された複
数本の散気管、3は散気管2の上方に形成される焼却炉
1内の流動層、4は散気管2の下方に形成される焼却炉
1内の充填層である。散気管2の両側方壁には長手方向
に沿って複数個の散気口2aが1段ずつ形成されている。In FIG. 6, reference numeral 1 denotes a fluidized bed incinerator, 2 denotes a plurality of diffuser tubes traversed across the incinerator 1 at a distance from each other, and 3 denotes a diffuser tube formed above the diffuser tube 2. The fluidized bed 4 in the incinerator 1 is a packed bed formed in the incinerator 1 below the diffuser 2. A plurality of air diffusers 2a are formed on both side walls of the air diffuser 2 along the longitudinal direction one by one.
ごみや汚泥ケース等の被焼却物は破砕後、給塵装置5
によって焼却炉1内に側壁上方から供給され、焼却炉1
内において散気管2の噴出口2aから吹き込まれた流動化
空気により、砂からなる流動媒体と共に流動層3を形成
する。そして被焼却物は流動層3を形成しながら一次燃
焼したのち、流動層3上方の焼却炉1内フリーボード空
間6において二次燃焼し、焼却が完了する。After crushing the incinerated materials such as garbage and sludge case,
Is supplied from above the side wall into the incinerator 1 by the incinerator 1
The fluidized bed blown from the jet port 2a of the diffuser 2 forms a fluidized bed 3 together with a fluidized medium made of sand. Then, the incineration material is subjected to primary combustion while forming the fluidized bed 3 and then secondary-combustion in the freeboard space 6 in the incinerator 1 above the fluidized bed 3 to complete incineration.
充填層4は散気管2下方の焼却炉1内下部に充填され
た流動媒体の層からなっている。被焼却物中の不燃物を
焼却炉1内から除去するために、焼却炉1の下部に設け
られた排出装置7によって、充填層4から流動媒体が排
出される。これによって被焼却物中の不燃物は、散気管
2同士の間隙を通って充填層4内に降下し、次いで充填
層4を通って流動媒体と共に焼却炉1の下部から排出さ
れる。排出された不燃物と流動媒体とは分別され、流動
媒体は焼却炉1内に側壁上方から再び補給され、不燃物
は別途処理される。The packed bed 4 is composed of a bed of a fluid medium filled in the lower part of the incinerator 1 below the diffuser 2. The fluidized medium is discharged from the packed bed 4 by the discharge device 7 provided at the lower part of the incinerator 1 in order to remove the incombustibles in the incinerator from the incinerator 1. As a result, the incombustibles in the incineration material fall into the packed bed 4 through the gap between the diffuser tubes 2 and are then discharged from the lower part of the incinerator 1 through the packed bed 4 together with the fluidized medium. The discharged incombustibles are separated from the fluid medium, the fluid medium is resupplied into the incinerator 1 from above the side wall, and the incombustibles are separately treated.
[発明が解決しようとする課題] 上述したように、焼却炉1内の流動媒体は焼却炉1の
下部から排出され、そして焼却炉1内に上方から再び補
給されるが、焼却炉1内には被焼却物に伴って砂や小石
の持ち込みがあり、流動媒体と同程度の大きさの砂の持
ち込み量の多少によって、流動層3を形成する流動媒体
の量が増減し、変動する。[Problems to be Solved by the Invention] As described above, the fluid medium in the incinerator 1 is discharged from the lower part of the incinerator 1 and is replenished into the incinerator 1 from above. There is sand and pebbles brought in with the incineration material, and the amount of the fluid medium forming the fluidized bed 3 increases and decreases depending on the amount of the sand brought in as large as the fluid medium.
この流動層3を形成する流動媒体の量は、散気管2か
ら流動層3内に吹き込まれる流動化空気と共に、流動層
3の流動状態に決定するために、その流動媒体の量が変
動すると流動層3の流動状態が左右され、流動層3内に
おける被焼却物の燃焼状態が良好に保たれない。The amount of the fluid medium forming the fluidized bed 3 is determined together with the fluidized air blown into the fluidized bed 3 from the air diffuser 2 to determine the fluidized state of the fluidized bed 3. The fluidized state of the bed 3 is affected, and the combustion state of the incinerated material in the fluidized bed 3 cannot be maintained well.
すなわち、流動層3を形成する流動媒体の量が増加す
ると、流動層3の層厚が増加するので、流動化空気の量
が一定の場合、流動層3内で流動化空気を気泡径が成長
して、流動層3が激しい流動状態を呈する。このとき被
焼却物の攪拌、混合効果は高くなるために、一般に燃焼
は激しく行われるが、流動層3の横断面方向上では燃焼
が不均一になる。一方、流動層3を形成する流動媒体の
量が減少すると流動化空気の量が一定の場合、流動層3
の層厚が薄くなるので、流動層3に流動化空気の吹き抜
け現象が生じて、流動層3を良好に流動化することがで
きない。このために被焼却物の燃焼が追いつかず、焼却
炉1内に被焼却物が溜まって来てしまう。That is, when the amount of the fluid medium forming the fluidized bed 3 increases, the thickness of the fluidized bed 3 increases. Therefore, when the amount of fluidized air is constant, the bubble diameter of the fluidized air grows in the fluidized bed 3. As a result, the fluidized bed 3 exhibits an intense fluidized state. At this time, since the effect of stirring and mixing of the incinerated material is enhanced, the combustion is generally performed violently, but the combustion becomes uneven in the cross-sectional direction of the fluidized bed 3. On the other hand, when the amount of fluidized air forming the fluidized bed 3 decreases and the amount of fluidized air is constant,
Is thin, fluidized air blows through the fluidized bed 3 and the fluidized bed 3 cannot be fluidized satisfactorily. For this reason, the burning of the incinerated material cannot catch up, and the incinerated material accumulates in the incinerator 1.
このようなことから、従来は焼却炉1での流動媒体の
排出、補給を頻繁に行って、流動層3を形成する流動媒
体の量の変動を解消し、流動層3の流動状態を適切に維
持していた。For this reason, conventionally, the fluid medium in the incinerator 1 is frequently discharged and replenished to eliminate fluctuations in the amount of the fluid medium forming the fluidized bed 3 and to appropriately adjust the fluidized state of the fluidized bed 3. Had been maintained.
本発明の目的は、上述の現状に鑑み、流動層の層厚が
変化しても、その変化に応じて流動化空気(一次燃焼空
気)を適切に供給し得、流動状態を適切に維持すること
を可能とした流動層式焼却炉の散気管構造を提供するこ
とにある。SUMMARY OF THE INVENTION In view of the above situation, it is an object of the present invention to appropriately supply fluidized air (primary combustion air) in accordance with a change in the thickness of a fluidized bed and maintain a fluid state appropriately. It is an object of the present invention to provide a diffuser tube structure of a fluidized bed incinerator which enables the above.
[課題を解決するための手段] 本発明は、その上方に形成される流動媒体と被焼却物
との流動層に流動化空気を吹き込むため、炉内にこれを
横断すべく掛け渡された流動式焼却炉の散気管構造にお
いて、該散気管にその高さ方向に多段の空気噴出口を形
成すると共に、これら高さ方向に多段に形成された空気
噴出口に選択的に開閉するための開閉弁を設けたことを
特徴とする。Means for Solving the Problems According to the present invention, fluidized air is blown into a furnace in order to blow fluidized air into a fluidized bed of a fluidized medium and an object to be incinerated. In the diffuser tube structure of the incinerator, a multistage air outlet is formed in the diffuser tube in the height direction, and an opening and closing for selectively opening and closing the air outlets formed in the multistage in the height direction is performed. A valve is provided.
[作用] 散気管にその高さ方向に多段に空気噴出口を形成する
と共に、これら高さ方向に多段に形成された空気噴出口
に選択的に開閉するための開閉弁を設けたので、開閉弁
を操作することにより、散気管に形成した任意の空気噴
出口を選択的に開いて、流動化空気を噴出させることが
できる。従って、流動化空気を噴出させる空気噴出口を
その高さ方向に沿って変えることにより、散気管上方に
形成される流動層の層厚が変化しても、一定の流動層の
層厚として流動化空気を噴出させることができ、流動媒
体を排出、補給して流動層のレベル乃至層厚を調節する
ことなく、流動層の流動状態を適切に維持することがで
きる。[Operation] The air diffuser is formed with air outlets in multiple stages in the height direction, and the air outlets formed in multiple stages in the height direction are provided with on-off valves for selectively opening and closing. By operating the valve, it is possible to selectively open an arbitrary air outlet formed in the diffuser tube to eject fluidized air. Therefore, even if the thickness of the fluidized bed formed above the diffuser tube changes by changing the air ejection port for ejecting the fluidized air along the height direction, the fluidized bed can be maintained as a constant fluidized bed thickness. The fluidized bed can be ejected, and the fluidized medium can be discharged and replenished to adjust the level or thickness of the fluidized bed and maintain the fluidized state of the fluidized bed appropriately.
[実施例] 以下本発明の実施例について詳述する。EXAMPLES Examples of the present invention will be described in detail below.
第1図は本発明を適用した散気管の第1実施例を示す
斜視図である。第1図に示すように、本発明の第1実施
例の散気管8は、円形断面の管の両側方壁に長手方向に
沿って複数個の空気噴出口8aを、上下に2段ずつ形成し
てなっており、そして、散気管8内に、これら上下2段
の空気噴出口8aを選択的に開閉するめの開閉弁9を設け
ている。開閉弁9は散気管8の内径とほぼ等しい外径を
有する円筒を略半割りにした両端開放の筒体からなって
おり、開閉弁9の回転中心には開閉弁9を回転するため
の回転軸9aが設けられている。開閉弁9は回転軸9aに係
合したモータ等の駆動手段(図示せず)によって回転さ
れる。開閉弁9を回転して散気管8内の上半部に位置さ
せると散気管8の下の段の空気噴出口8aが開いて、下の
段の空気噴出口8aから選択的に流動化空気が噴出する。
開閉弁9を回転して散気管8内の下半部に位置させる
と、散気管8の上の段の空気噴出口8aが開いて、上の段
の空気噴出口8aから選択的に流動化空気が噴出する。FIG. 1 is a perspective view showing a first embodiment of an air diffuser to which the present invention is applied. As shown in FIG. 1, a diffuser tube 8 according to a first embodiment of the present invention has a plurality of air outlets 8a formed on both side walls of a tube having a circular cross section along a longitudinal direction, two steps vertically. An opening / closing valve 9 for selectively opening and closing these upper and lower two-stage air outlets 8a is provided in the air diffuser 8. The on-off valve 9 is formed of a cylinder having an outer diameter substantially equal to the inner diameter of the air diffuser tube 8 and opened at both ends, and the rotation center of the on-off valve 9 is used to rotate the on-off valve 9. A shaft 9a is provided. The on-off valve 9 is rotated by driving means (not shown) such as a motor engaged with the rotating shaft 9a. When the on-off valve 9 is rotated and positioned in the upper half of the diffuser 8, the air outlet 8 a in the lower stage of the diffuser 8 is opened, and fluidized air is selectively supplied from the air outlet 8 a in the lower stage. Squirts.
When the on-off valve 9 is rotated and positioned in the lower half of the air diffuser 8, the upper air outlet 8 a of the upper air diffuser 8 is opened and fluidized selectively from the upper air outlet 8 a. Air blows out.
従って、第2図に示すように、流動層式焼却炉1内の
流動層3を形成する流動媒体の量が増加したときには、
複数本のすべての散気管8の上の段の空気噴出口8aを開
いて、そこから流動化空気を噴出させれば、流動層3を
形成する流動媒体の量を、流動媒体を排出することなく
適正な量に減少することができる。逆に、流動層3を形
成する流動媒体の量が減少したときには、複数本のすべ
ての散気管8の下の段の空気噴出口8aを開いて、そこか
ら流動化空気を噴出されば、流動層3を形成する流動媒
体の量を、流動媒体を補給することなく適正な量に増加
することができる。その結果、いずれの場合にも、流動
層3の流動状態を適切に維持することができる。Therefore, as shown in FIG. 2, when the amount of the fluid medium forming the fluidized bed 3 in the fluidized bed incinerator 1 increases,
By opening the air outlets 8a at the upper stage of all the plurality of diffuser tubes 8 and ejecting fluidized air therefrom, the amount of the fluid medium forming the fluidized bed 3 can be reduced by discharging the fluid medium. And can be reduced to an appropriate amount. Conversely, when the amount of the fluid medium forming the fluidized bed 3 decreases, the air outlets 8a at the lower stages of all of the plurality of diffuser tubes 8 are opened, and when the fluidized air is ejected therefrom, the fluidized fluid flows. The amount of flowing medium forming the layer 3 can be increased to an appropriate amount without replenishing the flowing medium. As a result, in any case, the fluidized state of the fluidized bed 3 can be appropriately maintained.
また、第3図に示すように、流動層3を形成する流動
媒体の量の変動がないときでも、複数本の散気管8の上
下の段の空気噴出口8aを種々に選択して開けることによ
り、流動層3の流動状態を種々に制御することができ
る。従って、被焼却物の質に応じた燃焼を適切に行わせ
ること等が可能となる。Also, as shown in FIG. 3, even when the amount of the fluid medium forming the fluidized bed 3 does not fluctuate, the upper and lower air outlets 8a of the plurality of diffuser tubes 8 can be selected and opened in various ways. Thereby, the flow state of the fluidized bed 3 can be variously controlled. Therefore, it is possible to appropriately perform combustion according to the quality of the incineration material.
第4図は本発明を適用した第2実施例の散気管を示す
斜視図である。第4図に示すように、第2実施例の散気
管10においては、流動化空気の噴出位置を上下方向で大
きく変化できるようにするために、長円形断面の管の両
側壁に上下2段の空気噴出口10aを上下方向に大きく離
して形成しており、そして、こらら上の段および下の段
の空気噴出口10aをそれぞれ選択的に開閉させるため
に、第1図に示したと同様な開閉弁9を、散気管10内上
部および下部に設けている。第4図に示した状態では、
散気管10の下の段の空気噴出口10aが開いているが、上
下の開閉弁9をそれぞれ半回転すると、散気管10の上の
段の空気噴出口10aが開き、下の段の空気噴出口10aが閉
じて、流動化空気の噴出位置を上下方向に大きく変化さ
せることができる。FIG. 4 is a perspective view showing a diffuser according to a second embodiment of the present invention. As shown in FIG. 4, in the diffuser tube 10 of the second embodiment, in order to be able to largely change the jetting position of the fluidizing air in the vertical direction, two vertical steps are provided on both side walls of the tube having an oval cross section. The air outlets 10a are formed so as to be largely apart in the vertical direction, and the upper and lower air outlets 10a are selectively opened and closed, respectively, as shown in FIG. A simple on-off valve 9 is provided in the upper part and lower part in the air diffuser 10. In the state shown in FIG.
The air outlet 10a at the lower stage of the diffuser tube 10 is open, but when the upper and lower on-off valves 9 are respectively rotated half a turn, the air outlet 10a at the upper stage of the diffuser tube 10 is opened, and the air jet at the lower stage is opened. The outlet 10a is closed, so that the jetting position of the fluidizing air can be largely changed in the vertical direction.
以上の実施例では、散気管の両側壁に空気噴出口を上
下2段に形成した場合を示したが、第5図に示す第3実
施例の散気管11のように、両側壁に空気噴出口11aを上
下3段以上形成することもでき、また、開閉弁も図に示
す断面H型の開閉弁12のように、散気管11内を上下に移
動するタイプのものにしてもよい。第3実施例の散気管
11によれば、流動化空気の噴出位置を、上下方向に選択
しつつ決定し、流動層の層厚乃至レベルの変化に応じて
細かく制御することが可能となる。In the above embodiment, the case where the air outlets are formed in both upper and lower sides on both side walls of the air diffuser is shown. However, as in the case of the air diffuser 11 of the third embodiment shown in FIG. The outlet 11a may be formed in three or more stages, and the on-off valve may be of a type that moves up and down in the air diffuser 11 like an on-off valve 12 having an H-shaped cross section shown in the figure. A diffuser tube of the third embodiment
According to 11, it is possible to determine the jetting position of the fluidizing air while selecting the jetting position in the vertical direction, and to finely control the jetting position in accordance with the change in the thickness or level of the fluidized bed.
[発明の効果] 本発明によれば、流動層を形成する流動媒体の量に変
動が生じて流動層の層厚あるいはレベルが変化しても流
動媒体の排出、補給を行うことなく、一定の流動化空気
を供給することにより、流動層の流動状態を適切に維持
することが可能となる。[Effects of the Invention] According to the present invention, even if the amount of the fluid medium forming the fluidized bed changes and the layer thickness or the level of the fluidized bed changes, the fluid medium is not discharged or replenished without a constant amount. By supplying the fluidizing air, the fluidized state of the fluidized bed can be appropriately maintained.
第1図は本発明を適用した散気管の第1実施例を示す斜
視図、第2図は第1図の散気管による流動化空気の噴出
のさせ方の例を示す説明図、第3図は同じく流動化空気
の噴出のさせ方の別の例を示す説明図、第4図は本発明
を適用した散気管の第2実施例を示す斜視図、第5図は
同じく第3実施例を示す斜視図、第6図は流動層式焼却
炉を示す概略側面図である。 図中、1は流動層式焼却炉、3は流動層、8,10,11は散
気管、8a,10a,11aは空気噴出口、9,12は開閉弁である。FIG. 1 is a perspective view showing a first embodiment of an air diffuser to which the present invention is applied, FIG. 2 is an explanatory view showing an example of how fluidized air is ejected by the air diffuser of FIG. 1, and FIG. Is an explanatory view showing another example of how fluidized air is jetted out, FIG. 4 is a perspective view showing a second embodiment of an air diffuser to which the present invention is applied, and FIG. FIG. 6 is a schematic side view showing a fluidized bed incinerator. In the figure, 1 is a fluidized bed incinerator, 3 is a fluidized bed, 8, 10 and 11 are diffuser tubes, 8a, 10a and 11a are air jet ports, and 9 and 12 are on-off valves.
Claims (1)
との流動層に流動化空気を吹き込むため、炉内にこれを
横断すべく掛け渡された流動層式焼却炉の散気管構造に
おいて、該散気管にその高さ方向に多段の空気噴出口を
形成すると共に、これら高さ方向に多段に形成された空
気噴出口に選択的に開閉するための開閉弁を設けたこと
を特徴とする流動層式焼却炉の散気管構造。1. A diffuser tube structure of a fluidized bed incinerator which is stretched across a furnace in order to blow fluidized air into a fluidized bed of a fluid medium and an incineration object formed above the fluidized bed. Wherein the air diffuser is formed with multi-stage air jets in the height direction thereof, and provided with an on-off valve for selectively opening and closing the air jets formed in the multi-stages in the height direction. A diffuser tube structure for a fluidized bed incinerator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20738288A JP2621404B2 (en) | 1988-08-23 | 1988-08-23 | Aeration tube structure of fluidized bed incinerator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20738288A JP2621404B2 (en) | 1988-08-23 | 1988-08-23 | Aeration tube structure of fluidized bed incinerator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0257812A JPH0257812A (en) | 1990-02-27 |
JP2621404B2 true JP2621404B2 (en) | 1997-06-18 |
Family
ID=16538805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20738288A Expired - Lifetime JP2621404B2 (en) | 1988-08-23 | 1988-08-23 | Aeration tube structure of fluidized bed incinerator |
Country Status (1)
Country | Link |
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JP (1) | JP2621404B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2572946B2 (en) * | 1994-06-30 | 1997-01-16 | 関電興業株式会社 | Screw hole cleaning machine |
JP5218097B2 (en) | 2009-01-27 | 2013-06-26 | 千住金属工業株式会社 | Automatic soldering device and transfer device |
-
1988
- 1988-08-23 JP JP20738288A patent/JP2621404B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0257812A (en) | 1990-02-27 |
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