JPH07103437A - Combustion air supply method for agitating incinerator and device thereof - Google Patents
Combustion air supply method for agitating incinerator and device thereofInfo
- Publication number
- JPH07103437A JPH07103437A JP27789293A JP27789293A JPH07103437A JP H07103437 A JPH07103437 A JP H07103437A JP 27789293 A JP27789293 A JP 27789293A JP 27789293 A JP27789293 A JP 27789293A JP H07103437 A JPH07103437 A JP H07103437A
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- Japan
- Prior art keywords
- combustion
- combustion air
- incinerator
- stirring
- furnace
- 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.)
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Links
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は炉床上を掻きならして被
焼却物の表面を更新し、均一な燃焼ができるようにした
攪拌焼却炉に関し、特に炉床に溜まる焼却灰を掻きなら
す攪拌棒から噴出される燃焼空気の供給方法並びにその
装置に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirring incinerator in which the surface of an incineration object is renewed by scratching the surface of the hearth to enable uniform combustion, and in particular, the incineration ash accumulated in the hearth is stirred and agitated. The present invention relates to a method and apparatus for supplying combustion air ejected from a rod.
【０００２】[0002]
【発明の背景】空気を吹き出しつつ水平回転する攪拌機
構を炉床内に有する攪拌焼却炉は、し尿処理汚泥、下水
処理汚泥等を焼却するために広く利用されている。この
攪拌焼却炉では、炉壁から投入された被焼却物は攪拌機
構で攪拌されながら焼却されながら炉床中央部に移動
し、生じる焼却灰は炉床中央部に設けられた燃焼灰排出
シュートに落下し、スクリューコンベヤ等で外部に引き
抜かれている。また焼却炉内は焼却ガスの外部へのリー
クを防止するため、通常は負圧で運転されている。BACKGROUND OF THE INVENTION Stirring incinerators having a stirring mechanism for horizontally rotating while blowing air are widely used to incinerate human waste sludge, sewage sludge and the like. In this agitation incinerator, the incinerator that is put in from the furnace wall moves to the central part of the hearth while being incinerated while being agitated by the agitation mechanism, and the incinerated ash that is generated is in the combustion ash discharge chute provided in the central part of the hearth. It has dropped and is pulled out by a screw conveyor. The inside of the incinerator is usually operated at a negative pressure in order to prevent the incineration gas from leaking to the outside.
【０００３】このような攪拌焼却炉における被焼却物は
投入口から炉床中央部に移動する過程において、まず被
焼却物が加熱され比較的低温で水分などが蒸発した後、
更に高温で熱分解ガスを発生する。これらの可燃性ガス
は、攪拌棒に付設した吹出孔から吹き出される燃焼空気
の供給を受けて燃焼する。一方、ガスを放出したあとの
炭素を主体とした固形物は赤熱灰（約５００〜９００
℃）と攪拌混合されながら攪拌棒に付設された吹出孔か
らの燃焼空気と接触し燠燃焼して、炉中心の開口部付近
では焼却が完了された灰となる。しかし図４、９（ａ）
に示すように、炉中の温度分布及び炎の状態は、炉床３
の外周部付近で燃焼が主に行われるため、各攪拌棒から
均一に燃焼空気を供給する従来の方法では、外周部付近
においては燃焼空気不足による黒煙発生がみられ、一
方、炉中心においては燃焼空気過多による吹き消え等が
起こり、ダスティングや燃費の悪化を引き起こしてい
た。In the process of moving the material to be incinerated in such a stirring incinerator from the charging port to the central part of the hearth, first, the material to be incinerated is heated to evaporate water and the like at a relatively low temperature.
Pyrolysis gas is generated at higher temperature. These combustible gases are burned by receiving the supply of combustion air blown from the blowout holes attached to the stirring rod. On the other hand, carbon-based solids after releasing gas are red hot ash (about 500 to 900
℃) while being stirred and mixed, it comes into contact with the combustion air from the blowout holes attached to the stirring rod and burns to form ash that has been completely incinerated near the opening in the center of the furnace. However, Fig. 4 and 9 (a)
As shown in Fig. 3, the temperature distribution and flame condition in the furnace are
Since combustion is mainly performed near the outer peripheral part of the furnace, black smoke is generated due to lack of combustion air near the outer peripheral part in the conventional method of uniformly supplying combustion air from each stirring rod, while at the center of the furnace. Was blown off due to excessive combustion air, causing dusting and deterioration of fuel efficiency.
【０００４】これらを解消するため、炉２ａの周壁部
に、一定の旋回流が形成されるように偏向させた多数の
旋回ガス吹出孔１３を設け、ここから外部空気を供給す
ることで外周部付近の燃焼空気不足を解消させることが
試みられているが、全体としては外周部付近を基準に燃
焼空気の調整を行うので燃焼空気過多になる傾向にあ
り、特に有効床面積２０ｍ2 程度の大型機では顕著に現
れていた。In order to solve these problems, a large number of swirling gas blowout holes 13 deflected so that a constant swirling flow is formed are provided in the peripheral wall of the furnace 2a, and external air is supplied from here to supply the outer air to the outer peripheral part. Although attempts have been made to eliminate the combustion air shortage around, they tend to be in the combustion air excess since the adjustment of combustion air based on the vicinity of the outer peripheral portion as a whole, particularly effective floor area 20 m 2 about large It was noticeable on the machine.
【０００５】[0005]
【開発を試みた技術的事項】本発明はこのような背景を
考慮してなされたものであって、焼却炉の燃焼状態が改
善され、ダスティングの発生や燃費の悪化を低減させる
ような攪拌焼却炉の燃焼空気供給方法並びにその装置の
開発を試みたものである。[Technical Items Attempted to Develop] The present invention has been made in view of such a background, and the stirring state is such that the combustion state of the incinerator is improved and the occurrence of dusting and the deterioration of fuel efficiency are reduced. This is an attempt to develop a combustion air supply method for an incinerator and its equipment.
【０００６】[0006]
【目的達成の手段】すなわち本出願に係る第一の発明た
る攪拌焼却炉の燃焼空気供給方法は、電動機の動力によ
り回転する回転軸と、この回転軸に対し設けられる複数
本のアームと、このアームから炉床に臨むように取り付
けられる攪拌棒とから成る攪拌機構を炉体内部に具え、
炉体底部には焼却灰排出機構を具えて成る焼却炉の運転
にあたり、炉中心に向かって進行する燃焼過程に対応す
るそれぞれの燃焼ゾーンに応じて、供給する燃焼空気の
量を異ならせたことを特徴として成る。[Means for Achieving the Object] That is, a combustion air supply method for a stirring incinerator according to a first invention of the present application, a rotating shaft rotated by power of an electric motor, a plurality of arms provided for the rotating shaft, A stirring mechanism including a stirring rod attached so as to face the hearth from the arm is provided inside the furnace body,
When operating an incinerator that has an incinerator ash discharge mechanism at the bottom of the furnace body, the amount of combustion air supplied was changed according to each combustion zone corresponding to the combustion process progressing toward the center of the furnace. Features.
【０００７】また本出願に係る第二の発明たる攪拌焼却
炉の燃焼空気供給方法は、前記要件に加えて、前記燃焼
過程に対応する燃焼ゾーンのうち、主燃焼ゾーンに向け
て燃焼空気を最大に供給するようにしたことを特徴とし
て成る。In addition to the above requirements, the combustion air supply method for a stirred incinerator according to the second invention of the present application provides maximum combustion air to the main combustion zone among the combustion zones corresponding to the combustion process. It is characterized by being supplied to.
【０００８】更にまた本出願に係る第三の発明たる攪拌
焼却炉の燃焼空気供給方法は、前記要件に加えて、前記
燃焼空気の供給量を、攪拌棒の回転軸からの距離に応じ
て増加させるこを特徴として成る。Furthermore, in addition to the above requirements, the third aspect of the present invention, the method for supplying combustion air to a stirring incinerator, increases the amount of combustion air supplied according to the distance from the rotating shaft of the stirring rod. It is characterized by sako.
【０００９】更にまた本出願に係る第四の発明たる攪拌
焼却炉の燃焼空気供給装置は、電動機の動力により回転
する回転軸と、この回転軸に対し設けられる複数本のア
ームと、このアームから炉床に臨むように取り付けられ
る攪拌棒とから成る攪拌機構を炉体内部に具え、炉体底
部には焼却灰排出機構を具えて成る焼却炉において、前
記攪拌棒は燃焼空気の吹出孔を具え、この吹出孔は炉中
心に向かって進行する燃焼過程に対応するそれぞれの燃
焼ゾーンに応じて、供給する燃焼空気の量を異ならせる
ように設定されていることを特徴として成る。Furthermore, a combustion air supply apparatus for a stirring incinerator according to a fourth invention of the present application is a rotary shaft which is rotated by the power of an electric motor, a plurality of arms provided for the rotary shaft, and the arm. In an incinerator having a stirring mechanism consisting of a stirring rod attached so as to face the hearth and an incinerator ash discharging mechanism at the bottom of the furnace body, the stirring rod has a blowout hole for combustion air. The blow-out holes are set so that the amount of combustion air supplied varies depending on each combustion zone corresponding to the combustion process proceeding toward the center of the furnace.
【００１０】更にまた本出願に係る第五の発明たる攪拌
焼却炉の燃焼空気供給装置は、前記請求項４記載の要件
に加えて、前記燃焼過程に対応する燃焼ゾーンのうち、
主燃焼ゾーンに向けて燃焼空気を最大に供給するように
したことを特徴として成る。Further, in addition to the requirements of claim 4, the fifth aspect of the invention is a combustion air supply device for a stirring incinerator, in which the combustion zone corresponding to the combustion process is:
It is characterized in that combustion air is supplied to the main combustion zone to the maximum extent.
【００１１】更にまた本出願に係る第六の発明たる攪拌
焼却炉の燃焼空気供給装置は、前記請求項４、５記載の
要件に加えて、前記吹出孔は、攪拌棒の回転軸からの距
離に応じて燃焼空気の供給量を増加させるように設定さ
れていることを特徴として成る。Furthermore, in the combustion air supply apparatus for a stirring incinerator according to the sixth invention of the present application, in addition to the requirements of the above-mentioned Claims 4 and 5, the blow-out hole has a distance from the rotating shaft of the stirring rod. Is set so as to increase the supply amount of combustion air in accordance with the above.
【００１２】更にまた本出願に係る第七の発明たる攪拌
焼却炉の燃焼空気供給装置は、前記請求項５、６記載の
要件に加えて、前記攪拌棒に具える燃焼空気の吹出孔
は、開孔面積比を異ならせることで、炉中心に向かって
進行する燃焼過程に対応するそれぞれの燃焼ゾーンに応
じて、供給する燃焼空気の量を異ならせていることを特
徴として成る。これら発明によって前記目的を達成しよ
うとするものである。Furthermore, in the combustion air supply apparatus for a stirring incinerator according to the seventh invention of the present application, in addition to the requirements of the fifth and sixth aspects, the combustion air blowout holes provided in the stirring rod are: By making the opening area ratio different, the amount of combustion air supplied is made different according to each combustion zone corresponding to the combustion process proceeding toward the furnace center. These inventions are intended to achieve the above object.
【００１３】[0013]
【発明の作用】本発明では、攪拌焼却炉内において炉中
心に向かって進行する燃焼過程に対応するそれぞれの燃
焼ゾーンに応じて、あるいは攪拌棒の回転軸からの距離
に応じて、炉床上を掻きならす攪拌棒に付設した吹出孔
から燃焼空気の量を異ならせて供給する。According to the present invention, in the stirring incinerator, the furnace floor is moved according to each combustion zone corresponding to the combustion process progressing toward the furnace center or according to the distance from the rotating shaft of the stirring rod. Combustion air is supplied with different amounts from the blow-out holes attached to the stirring rod for scraping.
【００１４】[0014]
【実施例】以下本発明を図示の実施例に基づいて説明す
る。なお本発明の説明にあたり、まず本発明の適用され
る円形攪拌焼却炉の構造を概略説明し、次いで本発明の
特徴を説明する。まず符号１は本発明の適用された円形
攪拌焼却炉であって、このものは耐火物で構成された炉
体２の内部に炉２ａ及び炉床３を形成するとともに、炉
床３には回転軸４を有する攪拌機構５を設け、また回転
軸４の近傍から炉２ａの外部へかけて焼却灰排出機構６
を形成して成る。なお本例においては炉床３の半径が
２．５ｍ（有効床面積約２０ｍ2 ）のものを用いる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiments. In describing the present invention, first, the structure of a circular stirring incinerator to which the present invention is applied will be briefly described, and then the features of the present invention will be described. First, reference numeral 1 is a circular stirring incinerator to which the present invention is applied, which forms a furnace 2a and a hearth 3 inside a furnace body 2 made of refractory, and a rotary hearth 3 rotates. A stirring mechanism 5 having a shaft 4 is provided, and an incineration ash discharging mechanism 6 is provided from the vicinity of the rotating shaft 4 to the outside of the furnace 2a.
Is formed. In this example, the radius of the hearth 3 is 2.5 m (effective floor area is about 20 m 2 ).
【００１５】炉体２の上部には排気ガスの排気口７が形
成され、また中程には助燃バーナ７ａが設けられ、更に
炉体２の内壁中程には被焼却物供給口８が形成される。
この被焼却物供給口８には、炉体２の外部に設けた被焼
却物供給ホッパ１０が接続し、スクリューコンベヤ１１
により被焼却物Ａを炉２ａ内に供給するようになってい
る。An exhaust port 7 for exhaust gas is formed in the upper part of the furnace body 2, an auxiliary combustion burner 7a is provided in the middle thereof, and an incinerator supply port 8 is formed in the middle of the inner wall of the furnace body 2. To be done.
An incineration object supply hopper 10 provided outside the furnace body 2 is connected to the incineration object supply port 8, and a screw conveyor 11 is provided.
Thus, the incineration target A is supplied into the furnace 2a.
【００１６】また炉体２の外周壁底部には旋回ガス案内
路１２が形成され、一方炉体２の内周壁底部には旋回ガ
ス案内路１２と通ずる複数の旋回ガス吹出孔１３が一定
の間隔で形成される。因みにこの旋回ガス吹出孔１３は
炉周壁に対して接線方向に旋回ガスを吹き出して、炉２
ａ内の燃焼炎に旋回流を形成させるためのものであり、
この旋回ガスが旋回ガス案内路１２に形成される旋回ガ
ス吹込口１４から供給されるようになっている。A swirl gas guide passage 12 is formed at the bottom of the outer peripheral wall of the furnace body 2, while a plurality of swirl gas blowout holes 13 communicating with the swirl gas guide passage 12 are formed at a constant interval at the bottom of the inner peripheral wall of the furnace body 2. Is formed by. By the way, the swirl gas blowout holes 13 blow out swirl gas in a tangential direction to the furnace peripheral wall, and
for forming a swirl flow in the combustion flame in a,
The swirl gas is supplied from a swirl gas inlet 14 formed in the swirl gas guide passage 12.
【００１７】次に攪拌機構５は、回転軸４に複数のアー
ム１５が放射状に張り出すように取り付けられ、各アー
ム１５にはそれぞれに複数の吹出孔１６を有する複数の
攪拌棒１７が炉床３に臨むように下向きに取り付けられ
る。因みに本実施例においては図１、２、３、４に示す
ものはアーム１５が四本、攪拌棒１７が三本であり、図
５、６、９に示すものはアーム１５が六本、攪拌棒１７
が六本である。また回転軸４、アーム１５及び攪拌棒１
７はそれぞれ内部が中空になっていて、これらが連通状
態に形成されることで空気案内路１８が形成され、この
空気案内路１８を介して、炉体２の外部に設けた燃焼ブ
ロワ１９から取り入れた燃焼空気が吹出孔１６より吹き
出す構造になっている。ところでこの吹出孔１６は、本
発明の特徴的部分であり、後述するように炉２ａ内の、
燃焼状態がそれぞれ異なっている燃焼ゾーンの状況ある
いは攪拌棒１７の回転軸４からの距離に応じて、供給す
る燃焼空気量を異ならせるものであるから、そのために
次のような特徴的構成を採る。つまり、図１、２、５、
９（ｃ）に示すように、炉２ａ内の燃焼状態がそれぞれ
異なっている燃焼ゾーンに位置する個々の攪拌棒１７に
具える吹出孔１６の開孔面積比を異ならせるのである。
この開孔面積比の設定は吹出孔１６の数、あるいは個々
の吹出孔１６の開孔面積を適宜選択することで行われ
る。Next, the stirring mechanism 5 is attached to the rotary shaft 4 so that a plurality of arms 15 are radially projected, and each arm 15 has a plurality of stirring rods 17 having a plurality of blowout holes 16 therein. It is attached downward so as to face 3. Incidentally, in this embodiment, the one shown in FIGS. 1, 2, 3, and 4 has four arms 15 and three stirring rods 17, and the one shown in FIGS. 5, 6, and 9 has six arms 15 and stirring. Stick 17
Is six. Further, the rotating shaft 4, the arm 15 and the stirring rod 1
Each of 7 has a hollow inside, and an air guide path 18 is formed by forming these in a communicating state, and a combustion blower 19 provided outside the furnace body 2 is provided via this air guide path 18. The combustion air taken in is blown out from the blowout holes 16. By the way, this blowout hole 16 is a characteristic part of the present invention, and as will be described later, in the furnace 2a,
Since the amount of combustion air to be supplied differs depending on the state of the combustion zone where the combustion states are different or the distance from the rotating shaft 4 of the stirring rod 17, the following characteristic configuration is adopted for that purpose. . In other words,
As shown in FIG. 9 (c), the opening area ratios of the blow holes 16 provided in the individual stirring rods 17 located in the combustion zones in which the combustion states in the furnace 2a are different are made different.
The opening area ratio is set by appropriately selecting the number of the blowing holes 16 or the opening area of each of the blowing holes 16.
【００１８】そして回転軸４の下端にはスプロケット２
０が設けられ、このスプロケット２０と近傍に設けた電
動機２１の出力軸に設けられるスプロケット２２との間
にチェーン２３が巻回されることで、電動機２１の動力
が攪拌機構５側に伝わるようになっている。The sprocket 2 is attached to the lower end of the rotary shaft 4.
0 is provided, and the chain 23 is wound between the sprocket 20 and the sprocket 22 provided on the output shaft of the electric motor 21 provided in the vicinity so that the power of the electric motor 21 is transmitted to the stirring mechanism 5 side. Has become.
【００１９】次に焼却灰排出機構６は、図３に示すよう
に回転軸４の近傍にその開口部３０を形成し、そこから
斜め下方に焼却灰排出シュート２９が延び、その他端側
に焼却灰排出コンベヤ３１が接続される。この焼却灰排
出コンベヤ３１は、モータＭの駆動により、スクリュー
３２を回転させることにより、焼却灰Ｂを移送するもの
である。Next, as shown in FIG. 3, the incineration ash discharging mechanism 6 has an opening 30 formed in the vicinity of the rotary shaft 4, from which an incineration ash discharging chute 29 extends obliquely downward, and the other end is incinerated. An ash discharge conveyor 31 is connected. The incineration ash discharge conveyor 31 is for transferring the incineration ash B by driving the motor M to rotate the screw 32.
【００２０】円形攪拌焼却炉１は、以上のような構造を
有するものであって、以下このものの作動状態について
説明しながら、本発明の特徴について説明する。まず被
焼却物供給口８から被焼却物Ａが炉２ａ中に投入され、
これに着火されると、被焼却物Ａの品温が上昇するにつ
れて被焼却物Ａから気化ガスや熱分解ガスが発生し、こ
れらは攪拌棒１７に具えた吹出孔１６から吹き出される
燃焼空気により燃焼する。The circular stirring incinerator 1 has the above-mentioned structure, and the features of the present invention will be described below while explaining the operating state of this. First, the incinerator A is put into the furnace 2a from the incinerator supply port 8,
When ignited, vaporized gas and pyrolysis gas are generated from the incinerated material A as the product temperature of the incinerated material A rises, and these are the combustion air blown out from the blowout holes 16 provided in the stirring rod 17. To burn.
【００２１】また投入された被焼却物Ａは、攪拌機構５
によって炉床３上で万遍なく掻きならされるため常に表
面が更新され、可燃性ガスが炉床３上で平均して発生す
る。更に旋回ガス吹出孔１３から炉２ａ内の燃焼炎に旋
回流を形成させるように旋回ガスが吹き込まれ、上部の
炉２ａ内で完全燃焼する。Further, the incinerated substance A that has been thrown in is stirred by the stirring mechanism 5.
Since it is evenly scratched on the hearth 3, the surface is constantly renewed, and flammable gas is generated on average on the hearth 3. Further, the swirl gas is blown from the swirl gas outlet 13 so as to form a swirl flow in the combustion flame in the furnace 2a, and complete combustion is performed in the upper furnace 2a.
【００２２】ガスを放出したあとの炭素を主体とした固
形物は、赤熱灰と攪拌混合しながら燃焼空気と接触し、
いわゆる燠燃焼して徐々に炉２ａ中心へ移動する。炉２
ａ中心の焼却灰排出シュート２９の開口部３０付近で
は、焼却を完了した灰が攪拌棒１７に具えた吹出孔１６
から吹き出した燃焼空気により冷却される。The solid material mainly composed of carbon after the gas is released comes into contact with the combustion air while stirring and mixing with the red hot ash,
So-called burning is carried out and gradually moved to the center of the furnace 2a. Furnace 2
In the vicinity of the opening 30 of the incineration ash discharge chute 29 at the center of a, the ash that has been completely incinerated is blown out on the agitating rod 17 through the blowout hole 16
It is cooled by the combustion air blown from.
【００２３】ここで炉２ａ内における燃焼状態を模式図
的に説明すると、図４に示すように被焼却物供給口８付
近は主に水分が蒸発する乾燥ゾーンＺ１となっており、
そこから旋回ガスの流れる上流の外側には主燃焼ゾーン
Ｚ２が形成される。また主燃焼ゾーンＺ２の内側には、
赤熱した炭化物燃焼ゾーンＺ３が形成され、その内側に
は焼却灰ゾーンＺ４が形成されている。Here, when the combustion state in the furnace 2a is schematically explained, as shown in FIG. 4, the vicinity of the incinerator supply port 8 is a drying zone Z1 in which water mainly evaporates,
A main combustion zone Z2 is formed outside of the upstream side where the swirling gas flows. Also, inside the main combustion zone Z2,
A red-hot carbide combustion zone Z3 is formed, and an incineration ash zone Z4 is formed inside the zone.
【００２４】このような燃焼形態における本発明の燃焼
空気の供給方法の説明をする。炉２ａ内の典型的な燃焼
の様子を図９（ａ）に示す。このグラフは横軸に炉２ａ
の中心からの距離を示し、縦軸に燃焼の強さを示すもの
であり、投入直後の燃焼はさほど強くなく、炉２ａ中心
から２ｍ〜１ｍの範囲で強燃焼が行われる様子を示して
いる。このような燃焼形態では、主たる燃焼空気要求ゾ
ーンもやはり強燃焼が行われる炉２ａ中心から２ｍ〜１
ｍの範囲となる、従って図９（ｂ）に示すような配分で
燃焼空気を供給することが望ましいのである。このため
炉２ａ中心から放射状に取り付けられるアーム１５に対
して複数本の攪拌棒１７を設け、それぞれの攪拌棒１７
に具える吹出孔１６の数または面積を異ならせること
で、前記乾燥ゾーンＺ１、主燃焼ゾーンＺ２、炭化物燃
焼ゾーンＺ３の各燃焼段階それぞれに供給する燃焼空気
の分配を行う。本例における吹出孔１６の数または開孔
面積の比は一例として、炉２ａ中心側から１：１：２：
３：４：２としている（図９（ｃ）参照）。またこの燃
焼状況は、ほぼ炉中心から炉壁に向かって強くなるの
で、吹出孔１６の開孔面積比を攪拌棒１７の回転軸４か
らの距離に応じて増加させてもよい。A method of supplying combustion air according to the present invention in such a combustion mode will be described. A typical combustion state in the furnace 2a is shown in FIG. 9 (a). This graph shows the furnace 2a on the horizontal axis
The distance from the center of the furnace is shown, and the vertical axis shows the strength of combustion. Combustion immediately after charging is not so strong, and shows that strong combustion is performed within a range of 2 m to 1 m from the center of the furnace 2a. . In such a combustion mode, the main combustion air requirement zone is also 2m to 1m from the center of the furnace 2a where strong combustion is also performed.
Therefore, it is desirable to supply the combustion air in a distribution as shown in FIG. 9 (b). For this reason, a plurality of stirring rods 17 are provided on the arm 15 radially attached from the center of the furnace 2a.
Combustion air supplied to each of the combustion stages of the drying zone Z1, the main combustion zone Z2, and the carbide combustion zone Z3 is distributed by varying the number or area of the blowout holes 16 provided in the above. As an example, the number of the blow holes 16 or the ratio of the open areas in the present example is 1: 1: 2: from the center side of the furnace 2a.
It is set to 3: 4: 2 (see FIG. 9C). Further, since this combustion condition becomes stronger from the center of the furnace toward the furnace wall, the opening area ratio of the blowout holes 16 may be increased according to the distance from the rotating shaft 4 of the stirring rod 17.
【００２５】また、図９（ｃ）に示すアーム１５′は、
回転軸４に取り付けられるアーム１５とは別の位置に取
り付けられる他のアームを図示するものであり、図９
（ｃ）ではこれらのアーム１５、１５′に設けられる攪
拌棒１７の配置位置を比較するため便宜上これらアーム
１５、１５′を上下に配置している。すなわち図９
（ｃ）に示すアーム１５′は、攪拌棒１７の長手方向の
配置位置がアーム１５と異ならせてあるため炉床３上の
被焼却物Ａを万遍なく掻きならすことができるととも
に、燃焼空気をも万遍なく供給することができる。Further, the arm 15 'shown in FIG. 9 (c) is
9 shows another arm attached to a position different from the arm 15 attached to the rotary shaft 4, and FIG.
In (c), the arms 15 and 15 'are arranged vertically for convenience in order to compare the arrangement positions of the stirring bars 17 provided on these arms 15 and 15'. That is, FIG.
In the arm 15 ′ shown in (c), the position of the stirring rod 17 in the longitudinal direction is different from that of the arm 15, so that the incinerated material A on the hearth 3 can be evenly scraped and the combustion air Can be evenly supplied.
【００２６】[0026]
【他の実施例】先に述べた実施例においては燃焼空気の
供給量の調整を行う開孔比の選択は、吹出孔１６の数ま
たは開孔面積によって行ったが、請求項５に定義したよ
うに各燃焼ゾーンに供給する燃焼空気の配分が行えれば
よいので、図７（ａ）に示すように中空状のアーム１５
と攪拌棒１７との接続部分の開口面積を異ならせること
で燃焼空気の配分を行うこともできる。また、吹出孔１
６の形状は先に述べた実施例においては丸穴形状を採っ
たが、図７（ｂ）（ｃ）に示すように、角穴形状、スリ
ット形状等を採ることも可能である。また、図８（ａ）
に示すように円筒状の攪拌棒１７に付設する吹出孔１６
の位置を円周上に分散させることで燃焼空気の吹き出し
に方向性を持たせ、各燃焼段階それぞれに供給する燃焼
空気の分配を更に細かく行うことも可能である。また図
８（ｃ）に示すように燃焼空気の吹き出し部をアーム１
５にノズルとして設け、炉床３上の被焼却物Ａの上方か
ら燃焼空気を供給するような構造を採ることも可能であ
る。更にまた攪拌棒１７は先に述べた実施例においては
円筒状のものを用いたが、角柱状等の形状でもよい。Other Embodiments In the above-described embodiment, the selection of the opening ratio for adjusting the supply amount of the combustion air was made by the number of the blow-out holes 16 or the opening area, which is defined in claim 5. Since it is only necessary to distribute the combustion air supplied to each combustion zone as described above, the hollow arm 15 as shown in FIG.
It is also possible to distribute the combustion air by changing the opening area of the connecting portion between the and stirring rod 17. In addition, the blowout hole 1
Although the shape of 6 has a round hole shape in the above-described embodiment, it may have a square hole shape, a slit shape, or the like as shown in FIGS. 7B and 7C. In addition, FIG.
As shown in FIG. 3, a blowout hole 16 attached to a cylindrical stirring bar 17
It is also possible to distribute the positions of the above positions on the circumference to give directionality to the blowing of the combustion air and to further finely distribute the combustion air supplied to each combustion stage. Further, as shown in FIG.
It is also possible to adopt a structure in which combustion air is supplied from above the incinerator A on the hearth 3 by providing it as a nozzle in No. 5. Furthermore, although the stirring rod 17 has a cylindrical shape in the above-described embodiment, it may have a prismatic shape or the like.
【００２７】[0027]
【発明の効果】本発明では、円形攪拌焼却炉１内におい
て炉２ａ中心に向かって進行する燃焼過程に対応するそ
れぞれの燃焼ゾーンに、炉床３上を掻きならす攪拌棒１
７に付設した吹出孔１６から、異なった量の燃焼空気を
供給することができる。このため外周部付近における燃
焼空気不足による黒煙発生並びに炉２ａ中心における燃
焼空気過多による吹き消え等が起こらなくなりダスティ
ングや燃費の悪化を解消することができる。また炉床３
の温度分布が均一化の方向に向かうので、局部的な高温
により発生するクリンカを防止することができる。ま
た、旋回ガスにより外周部付近の燃焼空気不足を解消さ
せる必要がなくなるので、イニシャルコストが低減され
る。また、従来は燃焼空気を過多状態で運転していた
が、本発明により最適の供給量で運転できるためこれに
伴い排気風量が低減され脱臭等の処理量が減り、コスト
が低減される。According to the present invention, in the circular stirring incinerator 1, the stirring rod 1 for scraping the hearth 3 on each combustion zone corresponding to the combustion process progressing toward the center of the furnace 2a.
Different amounts of combustion air can be supplied from the blow-out holes 16 attached to 7. Therefore, generation of black smoke due to shortage of combustion air near the outer peripheral portion and blowout due to excessive combustion air in the center of the furnace 2a do not occur, and dusting and deterioration of fuel efficiency can be eliminated. Also hearth 3
Since the temperature distribution in the direction of (1) tends to be uniform, it is possible to prevent a clinker generated due to a local high temperature. Further, since it is not necessary to eliminate the shortage of the combustion air in the vicinity of the outer peripheral portion by the swirling gas, the initial cost is reduced. Further, conventionally, the combustion air was operated in an excessive amount, but according to the present invention, the operation can be performed with an optimum supply amount, so that the exhaust air amount is reduced, the processing amount such as deodorization is reduced, and the cost is reduced.
【図１】本発明を適用した円形攪拌焼却炉を一部破断ま
たは拡大して示す斜視図である。FIG. 1 is a partially cutaway or enlarged perspective view of a circular stirring incinerator to which the present invention is applied.
【図２】同上縦断側面図並びにその一部（一点鎖線円で
示す）を拡大して示す側面図である。FIG. 2 is a vertical sectional side view of the same as above and a side view showing a part thereof (shown by a chain line) in an enlarged manner.
【図３】同上炉床付近を拡大して示す縦断側面図であ
る。FIG. 3 is a vertical cross-sectional side view showing an enlarged vicinity of the hearth.
【図４】炉内の燃焼状態を示す模式図である。FIG. 4 is a schematic diagram showing a combustion state in a furnace.
【図５】アームの本数及び攪拌棒の本数を異ならせた攪
拌機構の他の実施例を示す側面図である。FIG. 5 is a side view showing another embodiment of the stirring mechanism in which the number of arms and the number of stirring rods are different.
【図６】同上平面図である。FIG. 6 is a plan view of the same.
【図７】アームと攪拌棒との接続部分の開口面積を異な
らせた実施例を示す縦断側面図並びに吹出孔の形状を異
ならせた二種の実施例を示す側面図である。FIG. 7 is a vertical cross-sectional side view showing an embodiment in which an opening area of a connecting portion between an arm and a stirring rod is different, and a side view showing two kinds of embodiments in which a shape of a blowout hole is different.
【図８】吹出孔の刻設位置を円周方向に分散させた実施
例を示す横断底面図並びに燃焼空気の吹き出し部をアー
ムにノズルとして設けた実施例を示す縦断側面図であ
る。FIG. 8 is a cross-sectional bottom view showing an embodiment in which the engraved positions of the blowout holes are dispersed in the circumferential direction, and a vertical cross-sectional side view showing the embodiment in which a blowout portion of the combustion air is provided on the arm as a nozzle.
【図９】炉内の燃焼の様子及び供給する燃焼空気量を示
すグラフ並びに攪拌棒の燃焼空気供給配分を示す概略図
である。FIG. 9 is a schematic diagram showing a state of combustion in a furnace and a graph showing a combustion air amount to be supplied, and a combustion air supply distribution of a stirring rod.
１ 円形攪拌焼却炉 ２ 炉体 ２ａ 炉 ３ 炉床 ４ 回転軸 ５ 攪拌機構 ６ 焼却灰排出機構 ７ 排気口 ７ａ 助燃バーナ ８ 被焼却物供給口 １０ 被焼却物供給ホッパ １１ スクリューコンベヤ １２ 旋回ガス案内路 １３ 旋回ガス吹出孔 １４ 旋回ガス吹込口 １５ アーム １５′ アーム １６ 吹出孔 １７ 攪拌棒 １８ 空気案内路 １９ 燃焼ブロワ ２０ スプロケット ２１ 電動機 ２１ａ 配線 ２２ スプロケット ２３ チェーン ２９ 焼却灰排出シュート ３０ 開口部 ３１ 焼却灰排出コンベヤ ３２ スクリュー Ａ 被焼却物 Ｂ 焼却灰 Ｍ モータ Ｚ１ 乾燥ゾーン Ｚ２ 主燃焼ゾーン Ｚ３ 炭化物燃焼ゾーン Ｚ４ 焼却灰ゾーン 1 circular stirring incinerator 2 furnace body 2a furnace 3 hearth 4 rotating shaft 5 stirring mechanism 6 incineration ash discharging mechanism 7 exhaust port 7a auxiliary combustion burner 8 incinerated material supply port 10 incinerated material supply hopper 11 screw conveyor 12 swirling gas guide path 13 Swirling Gas Blow-out Hole 14 Swirling Gas Blow-in 15 Arm 15 'Arm 16 Blow-out Hole 17 Stirring Bar 18 Air Guideway 19 Combustion Blower 20 Sprocket 21 Electric Motor 21a Wiring 22 Sprocket 23 Chain 29 Burned Ash Discharge Chute 30 Opening 31 Burned Ash Discharge Conveyor 32 Screw A Incinerator B Incineration ash M Motor Z1 Drying zone Z2 Main combustion zone Z3 Carbide combustion zone Z4 Incineration ash zone
Claims (7)
この回転軸に対し設けられる複数本のアームと、このア
ームから炉床に臨むように取り付けられる攪拌棒とから
成る攪拌機構を炉体内部に具え、炉体底部には焼却灰排
出機構を具えて成る焼却炉の運転にあたり、炉中心に向
かって進行する燃焼過程に対応するそれぞれの燃焼ゾー
ンに応じて、供給する燃焼空気の量を異ならせたことを
特徴とする攪拌焼却炉の燃焼空気供給方法。1. A rotating shaft which is rotated by the power of an electric motor,
A stirring mechanism consisting of a plurality of arms provided for this rotating shaft and a stirring rod attached so as to face the hearth from the arms is provided inside the furnace body, and an incinerator ash discharge mechanism is provided at the bottom of the furnace body. Combustion air supply method for a stirring incinerator, characterized in that the amount of combustion air to be supplied is changed according to each combustion zone corresponding to the combustion process progressing toward the center of the incinerator. .
ち、主燃焼ゾーンに向けて燃焼空気を最大に供給するよ
うにしたことを特徴とする請求項１記載の攪拌焼却炉の
燃焼空気供給方法。2. The method for supplying combustion air to a stirred incinerator according to claim 1, wherein combustion air is supplied to a main combustion zone to a maximum among combustion zones corresponding to the combustion process. .
軸からの距離に応じて増加させるこを特徴とする請求項
１または２記載の攪拌焼却炉の燃焼空気供給方法。3. The combustion air supply method for a stirred incinerator according to claim 1, wherein the supply amount of the combustion air is increased according to the distance from the rotation axis of the stirring rod.
この回転軸に対し設けられる複数本のアームと、このア
ームから炉床に臨むように取り付けられる攪拌棒とから
成る攪拌機構を炉体内部に具え、炉体底部には焼却灰排
出機構を具えて成る焼却炉において、前記攪拌棒は燃焼
空気の吹出孔を具え、この吹出孔は炉中心に向かって進
行する燃焼過程に対応するそれぞれの燃焼ゾーンに応じ
て、供給する燃焼空気の量を異ならせるように設定され
ていることを特徴とする、攪拌焼却炉の燃焼空気供給装
置。4. A rotating shaft which is rotated by the power of an electric motor,
A stirring mechanism consisting of a plurality of arms provided for this rotating shaft and a stirring rod attached so as to face the hearth from the arms is provided inside the furnace body, and an incinerator ash discharge mechanism is provided at the bottom of the furnace body. In the incinerator, the stirring rod has a blowout hole for combustion air, and the blowout hole varies the amount of combustion air to be supplied according to each combustion zone corresponding to the combustion process progressing toward the center of the furnace. A combustion air supply device for a stirring incinerator, which is characterized in that:
ち、主燃焼ゾーンに向けて燃焼空気を最大に供給するよ
うにしたことを特徴とする、請求項４記載の攪拌焼却炉
の燃焼空気供給装置。5. The combustion air supply for an agitation incinerator according to claim 4, wherein the combustion air is supplied to the main combustion zone to the maximum among the combustion zones corresponding to the combustion process. apparatus.
離に応じて燃焼空気の供給量を増加させるように設定さ
れていることを特徴とする請求項４または５記載の攪拌
焼却炉の燃焼空気供給装置。6. The agitation incinerator according to claim 4, wherein the blowout holes are set so as to increase the supply amount of the combustion air according to the distance from the rotation axis of the agitation rod. Combustion air supply device.
は、開孔面積比を異ならせることで、炉中心に向かって
進行する燃焼過程に対応するそれぞれの燃焼ゾーンに応
じて、供給する燃焼空気の量を異ならせていることを特
徴とする請求項５または６記載の攪拌焼却炉の燃焼空気
供給装置。7. The blowout holes of the combustion air provided in the stirring rod are supplied in accordance with the respective combustion zones corresponding to the combustion process progressing toward the center of the furnace by changing the opening area ratio. 7. The combustion air supply device for a stirred incinerator according to claim 5, wherein the amount of combustion air is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27789293A JP3395119B2 (en) | 1993-10-08 | 1993-10-08 | Method and apparatus for supplying combustion air to stirred incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27789293A JP3395119B2 (en) | 1993-10-08 | 1993-10-08 | Method and apparatus for supplying combustion air to stirred incinerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07103437A true JPH07103437A (en) | 1995-04-18 |
| JP3395119B2 JP3395119B2 (en) | 2003-04-07 |
Family
ID=17589746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27789293A Expired - Lifetime JP3395119B2 (en) | 1993-10-08 | 1993-10-08 | Method and apparatus for supplying combustion air to stirred incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3395119B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100668464B1 (en) * | 2005-09-29 | 2007-01-12 | 서상철 | A feeding apparatus for a fixed quantity a solid fuel |
| KR100849930B1 (en) * | 2008-04-07 | 2008-08-04 | (주) 위넥스뷰 | Combustion apparatus for recycling flammable waste |
| KR101502567B1 (en) * | 2014-11-05 | 2015-03-16 | 동원엔지니어링(주) | Solid fuel combustion apparatus for clean hot wind generation and hot wind providing equipment using the same |
| JP2016217636A (en) * | 2015-05-21 | 2016-12-22 | 伊藤 鋼一 | Biomass fuel incineration furnace |
| JP2022027531A (en) * | 2020-07-30 | 2022-02-10 | 武夫 河原井 | Combustion apparatus for biomass fuel |
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| CN102588950B (en) * | 2012-03-02 | 2014-05-14 | 浙江大学 | Novel high-efficiency vaporizing combustion compound furnace grate device with slag disintegrating function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100668464B1 (en) * | 2005-09-29 | 2007-01-12 | 서상철 | A feeding apparatus for a fixed quantity a solid fuel |
| KR100849930B1 (en) * | 2008-04-07 | 2008-08-04 | (주) 위넥스뷰 | Combustion apparatus for recycling flammable waste |
| KR101502567B1 (en) * | 2014-11-05 | 2015-03-16 | 동원엔지니어링(주) | Solid fuel combustion apparatus for clean hot wind generation and hot wind providing equipment using the same |
| JP2016217636A (en) * | 2015-05-21 | 2016-12-22 | 伊藤 鋼一 | Biomass fuel incineration furnace |
| JP2022027531A (en) * | 2020-07-30 | 2022-02-10 | 武夫 河原井 | Combustion apparatus for biomass fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3395119B2 (en) | 2003-04-07 |
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