JP2000111025A - Secondary combustion furnace - Google Patents
Secondary combustion furnaceInfo
- Publication number
- JP2000111025A JP2000111025A JP10278484A JP27848498A JP2000111025A JP 2000111025 A JP2000111025 A JP 2000111025A JP 10278484 A JP10278484 A JP 10278484A JP 27848498 A JP27848498 A JP 27848498A JP 2000111025 A JP2000111025 A JP 2000111025A
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- exhaust gas
- gas
- primary combustion
- secondary 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.)
- Pending
Links
Landscapes
- Incineration Of Waste (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一次燃焼炉からの
排ガスを二次燃焼させる二次燃焼炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary combustion furnace for secondary combustion of exhaust gas from a primary combustion furnace.
【０００２】[0002]
【従来の技術】上記従来の二次燃焼炉は、例えば図６に
示すように、一次燃焼炉１からの一次燃焼排ガスを単純
に拡散燃焼させる二次燃焼炉２に導入し、二次空気を前
記一次燃焼排ガス中に吹き込んで二次燃焼させるもので
あった。図示の二次燃焼炉２は、第一室２１と第二室２
６とで構成してある。前記第一室２１は、下部に一次燃
焼ガス導入部２２を備えて一次燃焼炉１からの一次燃焼
排ガスを導入し、上端部に形成してあるガス排出部２３
に向けてガスを流通する上昇流路に形成してあり、二次
空気供給部２４を備えて、前記一次燃焼排ガスを二次燃
焼させるように構成してある。前記第二室２６は、前記
第一室２１のガス排出部２３に連続し、前記第一室２１
からの排ガスを導入する排ガス導入部２７を上端部に備
え、下部に下流側の煙道９に接続される燃焼排ガス排出
部２８を備えて、前記第一室２１からの排ガスの下降流
路を形成し、前記二次燃焼を完結させるように構成され
ている。そして、前記第一室２１及び前記第二室２６の
下端部は、ガス流から沈降する固形分を回収する固形分
回収部２９に形成してある。2. Description of the Related Art In the conventional secondary combustion furnace, as shown in FIG. 6, for example, primary combustion exhaust gas from a primary combustion furnace 1 is introduced into a secondary combustion furnace 2 for simply diffusing and burning, and secondary air is discharged. The secondary combustion is performed by blowing into the primary combustion exhaust gas. The illustrated secondary combustion furnace 2 includes a first chamber 21 and a second chamber 2.
6. The first chamber 21 is provided with a primary combustion gas introduction part 22 at a lower part to introduce primary combustion exhaust gas from the primary combustion furnace 1 and a gas discharge part 23 formed at an upper end part.
And a secondary air supply section 24 for secondary combustion of the primary combustion exhaust gas. The second chamber 26 is connected to the gas discharge part 23 of the first chamber 21 and is connected to the first chamber 21.
An exhaust gas introduction unit 27 for introducing exhaust gas from the upper end is provided, and a combustion exhaust gas discharge unit 28 connected to the flue 9 on the downstream side is provided at a lower portion. And is configured to complete the secondary combustion. The lower ends of the first chamber 21 and the second chamber 26 are formed in a solid content recovery section 29 for recovering solid content settling from the gas flow.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の二次燃焼炉
２の構成においては、一次燃焼排ガスに二次空気を供給
して二次燃焼させる第一室２１が単純に上昇流路に形成
してあり、前記二次燃焼に伴って、二次燃焼するガスの
流速は加速されるから、一次燃焼排ガス中に同伴する固
形分を積極的に分離する能力はない。従って、前記固形
分回収部２９に回収されるのは、前記第一室２１から前
記第二室２６に流入するガスが偏流されるのに伴って沈
降する固形分である。このため、煙道９下流側に設けて
ある除塵装置６にかかる負荷を軽減できないという問題
が有る。しかも、下流側の煙道９には前記固形分の失速
に伴って、次第に前記固形分が沈積するようになる。殊
に、図示のように前記二次燃焼炉２の下流側に熱回収装
置３を設けてある場合には、その熱回収装置３の伝熱管
３７への固形分の付着は、熱交換効率の低下を招くと同
時に、その伝熱管３７の腐食を促進するという問題も有
している。また、煙道９及び伝熱管３７に沈積した固形
分が触媒となり、ダイオキシンが生成される（デノボ生
成といわれる）。In the configuration of the conventional secondary combustion furnace 2 described above, the first chamber 21 for supplying the secondary air to the primary combustion exhaust gas and performing the secondary combustion is simply formed in the ascending flow path. Since the flow rate of the secondary combustion gas is accelerated with the secondary combustion, there is no ability to positively separate solids entrained in the primary combustion exhaust gas. Therefore, what is collected by the solid content collection unit 29 is the solid content that settles as the gas flowing from the first chamber 21 into the second chamber 26 is deflected. For this reason, there is a problem that the load on the dust removal device 6 provided on the downstream side of the flue 9 cannot be reduced. In addition, the solids gradually accumulate in the flue 9 on the downstream side as the solids stall. In particular, when the heat recovery device 3 is provided on the downstream side of the secondary combustion furnace 2 as shown in the figure, the adhesion of the solid to the heat transfer tube 37 of the heat recovery device 3 reduces the heat exchange efficiency. At the same time, there is a problem that the heat transfer tube 37 is accelerated to be corroded. Further, solids deposited on the flue 9 and the heat transfer tube 37 serve as a catalyst to generate dioxin (referred to as de novo generation).
【０００４】そこで、一次燃焼排ガスの二次燃焼を効率
的に行わしめると同時に、前記一次燃焼排ガス中に同伴
する固形分を二次燃焼排ガスから分離除去可能な二次燃
焼炉を提供する点にある。In view of the above, it is an object of the present invention to provide a secondary combustion furnace capable of efficiently performing secondary combustion of the primary combustion exhaust gas and separating and removing solids accompanying the primary combustion exhaust gas from the secondary combustion exhaust gas. is there.
【０００５】[0005]
【課題を解決するための手段】〔本発明の特徴構成〕請
求項１に係わる本発明の二次燃焼炉の第１特徴構成は、
図１及び図２に示した例に沿って説明すれば、一次燃焼
炉１からの一次燃焼排ガスを導入する一次燃焼ガス導入
部２２を上下何れか一方に備え、他方にガス排出部２３
を備えて、上下方向に流路を形成してある第一室２１
と、前記第一室２１のガス排出部２３側の位置に前記一
次室２１からの排出ガスを導入するガス導入部２７を備
え、前記一次燃焼ガス導入部２２側の位置に前記導入し
たガスを二次燃焼させた後の二次燃焼排ガスを煙道９に
向けて排出する燃焼排ガス排出部２８を備えて、上下方
向に流路を形成してある第二室２６とを設けてあり、前
記一次燃焼ガス導入部２２を、前記第一室２１の内壁２
１ａに沿って前記一次燃焼排ガスを旋回流入させるよう
に横に偏向させて配置すると共に、前記導入した一次燃
焼排ガスを二次燃焼させるための二次空気供給部２４を
横に偏向させて設けて、前記第一室２１内で前記一次燃
焼排ガスを旋回しつつ燃焼させるように構成し、前記ガ
ス導入部２７を、前記第二室２６の内壁２６ａに沿って
前記第一室２１からの排出ガスを旋回流入させるように
横に偏向させて配置して、前記排出ガスが前記第二室２
６内を旋回流通するように構成し、前記第一室２１及び
前記第二室２６の下方に、前記両室２１，２６を通過す
るガスから分離される固形分を回収する固形分回収部２
９を設けてある点にある。Means for Solving the Problems [Characteristic structure of the present invention] The first characteristic structure of the secondary combustion furnace of the present invention according to claim 1 is as follows.
According to the example shown in FIGS. 1 and 2, a primary combustion gas introduction unit 22 for introducing primary combustion exhaust gas from the primary combustion furnace 1 is provided at one of upper and lower sides, and a gas discharge unit 23 is provided at the other.
The first chamber 21 having a vertical flow path
A gas introduction part 27 for introducing exhaust gas from the primary chamber 21 at a position on the gas discharge part 23 side of the first chamber 21, and disposing the introduced gas at a position on the primary combustion gas introduction part 22 side. A second chamber 26 having a flue gas discharge part 28 for discharging the secondary combustion exhaust gas after the secondary combustion toward the flue 9 and forming a flow path in a vertical direction; The primary combustion gas inlet 22 is connected to the inner wall 2 of the first chamber 21.
1a, the primary combustion exhaust gas is laterally deflected so as to swirl and flow therein, and a secondary air supply unit 24 for secondary combustion of the introduced primary combustion exhaust gas is laterally deflected and provided. The primary combustion exhaust gas is configured to be swirled and burned in the first chamber 21, and the gas introduction unit 27 is configured to reduce the exhaust gas from the first chamber 21 along the inner wall 26 a of the second chamber 26. Are arranged to be deflected sideways so as to swirl and flow, so that the exhaust gas is
6, a solid content recovery section 2 configured to recover the solid content separated from the gas passing through the two chambers 21 and 26 below the first chamber 21 and the second chamber 26.
9 is provided.
【０００６】請求項２に係わる本発明の二次燃焼炉の第
２特徴構成は、図１に示した例に沿って説明すれば、上
記第１特徴構成における第一室２１に、導入した一次燃
焼排ガスを加熱するためのバーナ２５を設けてある点に
ある。The second characteristic configuration of the secondary combustion furnace according to the present invention according to claim 2 will be described with reference to the example shown in FIG. 1. The point is that a burner 25 for heating the combustion exhaust gas is provided.
【０００７】請求項３に係わる本発明の二次燃焼炉の第
３特徴構成は、図１及び図２に示した例に沿って説明す
れば、上記第１特徴構成又は第２特徴構成における一次
燃焼ガス導入部２２を、第一室２１の上方に配置して、
一次燃焼排ガスが旋回しながら下降しつつ二次燃焼する
ように構成する共に、燃焼排ガス排出部２８を、第二室
２６の上方に配置して、前記第一室２１からの排出ガス
が旋回しながら上昇するように構成してある点にある。The third characteristic structure of the secondary combustion furnace according to the present invention according to claim 3 will be described with reference to the examples shown in FIGS. 1 and 2. The combustion gas introduction part 22 is arranged above the first chamber 21,
The primary combustion exhaust gas is configured to perform secondary combustion while descending while rotating, and the combustion exhaust gas discharge unit 28 is disposed above the second chamber 26 so that the exhaust gas from the first chamber 21 rotates. The point is that it is configured to rise.
【０００８】請求項４に係わる本発明の二次燃焼炉の第
４特徴構成は、図３に示した例に沿って説明すれば、上
記第３特徴構成における第一室２１における一次燃焼排
ガスの旋回方向と、第二室２６における排出ガスの旋回
方向とを互いに逆方向にしてある点にある。The fourth characteristic configuration of the secondary combustion furnace according to the present invention according to claim 4 will be described with reference to the example shown in FIG. 3, in which the primary combustion exhaust gas in the first chamber 21 in the third characteristic configuration is described. The point is that the turning direction and the turning direction of the exhaust gas in the second chamber 26 are opposite to each other.
【０００９】〔特徴構成の作用及び効果〕上記本発明に
係わる二次燃焼炉の第１特徴構成によれば、一次燃焼排
ガスの二次燃焼に際して、前記一次燃焼排ガス中に同伴
する固形分を分離除去できるようになる。つまり、一次
燃焼排ガスが主として二次燃焼する第一室内で、導入さ
れた前記一次燃焼排ガスが旋回するから、前記一次燃焼
排ガス中の一酸化炭素が二次燃焼すると同時に、その二
次燃焼の際の旋回に伴って、前記一次燃焼排ガスに同伴
した固形分は前記第一室の内壁に向けて分離され、さら
に、排ガスが旋回する第二室で残余の固形分が除去さた
二次燃焼排ガスが煙道に向けて排出されるようになる。
そして、分離された固形分は固形分回収部から二次燃焼
炉外に排出できるから、分離された固形分が再度排ガス
中に戻ることがない。しかも、前記固形分を除去した状
態で、即ち、一酸化炭素及び塩素分の減少した状態で、
前記一次燃焼排ガス中の一酸化炭素が二次燃焼するか
ら、前記第一室内のガスにおける新たなダイオキシンの
生成は抑制され、そこに含有されるダイオキシンも熱分
解できるようになる。従って、排出ガス中のダイオキシ
ン濃度を低減することも可能になる。According to the first aspect of the secondary combustion furnace according to the present invention, at the time of the secondary combustion of the primary combustion exhaust gas, the solid components entrained in the primary combustion exhaust gas are separated. Can be removed. That is, since the introduced primary combustion exhaust gas is swirled in the first chamber where the primary combustion exhaust gas is mainly subjected to secondary combustion, carbon monoxide in the primary combustion exhaust gas undergoes secondary combustion, and at the same time, during the secondary combustion. With the swirling, the solids entrained in the primary combustion exhaust gas are separated toward the inner wall of the first chamber, and the secondary combustion exhaust gas from which the remaining solids are removed in the second chamber in which the exhaust gas swirls. Will be discharged into the flue.
Since the separated solid can be discharged from the solid recovery section to the outside of the secondary combustion furnace, the separated solid does not return to the exhaust gas again. Moreover, in a state where the solid content is removed, that is, in a state where carbon monoxide and chlorine content are reduced,
Since carbon monoxide in the primary combustion exhaust gas undergoes secondary combustion, the generation of new dioxin in the gas in the first chamber is suppressed, and the dioxin contained therein can also be thermally decomposed. Therefore, the dioxin concentration in the exhaust gas can be reduced.
【００１０】上記本発明に係わる二次燃焼炉の第２特徴
構成によれば、上記第１特徴構成の作用効果を助長でき
る。つまり、仮に、一次燃焼排ガスの温度が低下して、
二次燃焼炉内での二次燃焼の維持が困難になる場合で
も、バーナを用いて炉内ガスを加熱することで、二次燃
焼を維持できるようになり、また、必要に応じて再燃さ
せることも可能となる。ところで、ダイオキシンの生成
を抑制するには十分な酸素状態で燃焼させることが好ま
しいが、常温の空気を導入すれば必然的に燃焼温度が低
下し、ダイオキシンの分解が困難になる。そこで、適度
な酸素雰囲気状態で燃焼させるように空気を供給しつ
つ、バーナを用いて燃焼ガスの温度低下を抑制すること
で、ダイオキシンの生成を抑制することも可能になる。According to the second aspect of the secondary combustion furnace according to the present invention, the operation and effect of the first aspect can be promoted. In other words, if the temperature of the primary combustion exhaust gas decreases,
Even if it becomes difficult to maintain the secondary combustion in the secondary combustion furnace, it is possible to maintain the secondary combustion by heating the gas in the furnace using a burner, and re-burn if necessary. It is also possible. By the way, it is preferable to burn in a sufficient oxygen state to suppress the generation of dioxin. However, if air at normal temperature is introduced, the combustion temperature necessarily decreases, and it becomes difficult to decompose dioxin. Therefore, by supplying air so as to burn in an appropriate oxygen atmosphere state and using a burner to suppress a decrease in the temperature of the combustion gas, it is also possible to suppress the generation of dioxin.
【００１１】上記本発明に係わる二次燃焼炉の第３特徴
構成によれば、上記第１特徴構成又は第２特徴構成にお
いて、より効果的に炉内ガスからの固形分の分離を促進
できるようになる。つまり、第一室に導入された一次燃
焼排ガスが旋回下降するから、前記一次燃焼排ガスから
分離される固形分は、下方に向けての慣性を有し、固形
分回収部への分離回収が一層容易になる。According to the third aspect of the secondary combustion furnace according to the present invention, in the first aspect or the second aspect, the separation of solids from the furnace gas can be more effectively promoted. become. That is, since the primary combustion exhaust gas introduced into the first chamber swirls down, the solid content separated from the primary combustion exhaust gas has inertia downward, and the separation and recovery in the solid content recovery unit is further improved. It will be easier.
【００１２】上記本発明に係わる二次燃焼炉の第４特徴
構成によれば、上記第３特徴構成において、第二室にお
ける二次燃焼の完結及び第一室からの排出ガス中の固形
分の分離回収がさらに容易になる。つまり、前記第一室
のガス排出部から排出される排出ガスが、前記第二室の
ガス導入部の下流側で旋回方向を逆転される結果、前記
第二室内でのガスの拡散が良好に行われ、完全燃焼を促
進できるようになる。また、固形分に関しては、旋回に
伴う遠心力の作用方向が逆になるから、排ガス中で沈降
しやすくなる。従って、一酸化炭素と固形分との隔離を
早期に図ることが可能になる。According to a fourth aspect of the secondary combustion furnace according to the present invention, in the third aspect, the secondary combustion is completed in the second chamber and the solid content in the exhaust gas from the first chamber is reduced. Separation and recovery are further facilitated. That is, as a result of the exhaust gas discharged from the gas discharge part of the first chamber being reversed in the turning direction on the downstream side of the gas introduction part of the second chamber, the gas diffusion in the second chamber is favorably performed. And complete combustion can be promoted. Further, regarding the solid content, the action direction of the centrifugal force associated with the swirling is reversed, so that the solid content tends to settle in the exhaust gas. Therefore, it is possible to separate carbon monoxide from the solid content at an early stage.
【００１３】[0013]
【発明の実施の形態】以下、本発明に係わる二次燃焼炉
の実施形態の一例について図面を参照しながら説明す
る。図１は廃棄物燃焼処理装置に本発明に係る二次燃焼
炉を備える廃棄物焼却設備の一例を示す説明図であり、
図２は本発明に係る二次燃焼炉の一例である二次燃焼室
の縦断面図であり、図３は図１における二次燃焼室のＸ
−Ｘ断面図である。尚、上記従来の技術に用いた図６に
おける要素と同一の要素乃至同様の機能を果たす要素に
ついては、先の図６に付した符号と同一の、或いは関連
する符号を付し、詳細の説明の一部を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a secondary combustion furnace according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing an example of a waste incineration facility including a secondary combustion furnace according to the present invention in a waste combustion treatment apparatus,
FIG. 2 is a longitudinal sectional view of a secondary combustion chamber which is an example of the secondary combustion furnace according to the present invention, and FIG.
It is -X sectional drawing. Note that the same elements as those in FIG. 6 used in the above-described conventional technique or elements that perform similar functions are denoted by the same or related reference numerals as those in FIG. 6 and described in detail. Is partially omitted.
【００１４】本発明に係る二次燃焼炉を備える廃棄物燃
焼処理装置を設けた廃棄物焼却設備は、図１に示すよう
に、一次燃焼炉１と、二次燃焼炉２とからなる廃棄物燃
焼処理装置と、熱回収装置３と、排ガス冷却装置４と、
除塵装置６と、活性炭吸着塔７とを、順に設けて煙道９
で接続し、前記一次燃焼炉１からの燃焼排ガスを無害化
した後、誘引送風機８により煙突から大気中に排出する
ように構成してある。As shown in FIG. 1, a waste incineration facility provided with a waste combustion treatment apparatus having a secondary combustion furnace according to the present invention comprises a primary combustion furnace 1 and a secondary combustion furnace 2. A combustion processing device, a heat recovery device 3, an exhaust gas cooling device 4,
A dust removing device 6 and an activated carbon adsorption tower 7 are provided in order and a flue 9
After detoxifying the combustion exhaust gas from the primary combustion furnace 1, the exhaust gas is discharged from a chimney into the atmosphere by an induction blower 8.
【００１５】図には、一次燃焼炉１の一例として小型の
ゴミ焼却炉１０を設けた例を示してある。前記ゴミ焼却
炉１０は、ホッパ１１に投入されたゴミをスクリュ−フ
ィーダ１３Ａで構成してあるゴミ投入機構１３により、
火床１４上に投入するように構成してあり、前記ホッパ
１１には、前記スクリュ−フィーダ１３Ａへのゴミ供給
を調節する受入ダンパ機構１２を備えている。この受入
ダンパ機構１２は、二重ダンパ機構を採用したダブルゲ
ートダンパを備えており、ホッパ１１内に投入されたゴ
ミをスクリュ−フィーダ１３Ａに向けて落とし込む際
に、外気を炉内に吸入することを防止してある。さら
に、スクリュ−フィーダ１３Ａの入口には、解砕機構１
３ａとして、ロータリーフィーダとしても機能するロー
タリーカッタを設けてある。また、炉内の火床１４の下
方には約２００℃に予熱された一次空気を供給する風箱
を備えていると同時に、下方に灰を回収する灰回収機構
１６を備えている。前記火床１４上で焼却されるゴミが
発生する可燃ガスを燃焼させる一次燃焼空間１７を火床
１４上方に形成してあり、その一次燃焼空間１７内に攪
拌ガスを吹き込んで、前記一次空気と前記可燃ガスとの
混合を促進する攪拌ガス供給手段１８を前記一次燃焼空
間１７の側方に設けてある。この一次燃焼空間１７で燃
焼した一次燃焼排ガスの温度は、前記攪拌ガスによる冷
却も利用して、炉出口１９で約９００℃に維持される。FIG. 1 shows an example in which a small refuse incinerator 10 is provided as an example of the primary combustion furnace 1. The refuse incinerator 10 is provided with a refuse input mechanism 13 comprising a screw feeder 13A for transferring the refuse input to the hopper 11 by a refuse input mechanism 13.
The hopper 11 is provided with a receiving damper mechanism 12 for adjusting the supply of dust to the screw feeder 13A. The receiving damper mechanism 12 is provided with a double gate damper employing a double damper mechanism, and sucks outside air into the furnace when dust introduced into the hopper 11 is dropped toward the screw feeder 13A. Has been prevented. Further, a crushing mechanism 1 is provided at the entrance of the screw feeder 13A.
As 3a, a rotary cutter that also functions as a rotary feeder is provided. Further, a wind box for supplying primary air preheated to about 200 ° C. is provided below the grate 14 in the furnace, and an ash collecting mechanism 16 for collecting ash is provided below the furnace. A primary combustion space 17 for burning combustible gas that generates refuse incinerated on the grate 14 is formed above the grate 14, and a stirring gas is blown into the primary combustion space 17 to mix the primary air and the primary air. Stirring gas supply means 18 for promoting mixing with the combustible gas is provided on the side of the primary combustion space 17. The temperature of the primary combustion exhaust gas burned in the primary combustion space 17 is maintained at about 900 ° C. at the furnace outlet 19 by utilizing the cooling by the stirring gas.
【００１６】図１に廃棄物燃焼処理装置を構成するゴミ
焼却炉１０に付設したものとして示した二次燃焼室２０
は、本発明に係る二次燃焼炉２の一例であり、図２に縦
断面を示すように、ゴミ焼却炉１０の一次燃焼空間１７
で一次燃焼した、即ち一次燃焼炉１から排出される約９
００℃の一次燃焼排ガスを導入して、旋回下降しながら
二次燃焼させる第一室２１と、第一室２１からの排出ガ
スを上昇旋回させながら燃焼完結させる第二室２６とに
分割して構成してある。前記第一室２１と前記第二室２
６とは共に円筒状に形成してあり、二次燃焼処理するガ
スから分離される固形分を回収するホッパ形状の固形分
回収部２９を両室２１，２６夫々の下方に備えている。FIG. 1 shows a secondary combustion chamber 20 attached to a refuse incinerator 10 constituting a waste combustion treatment apparatus.
Is an example of the secondary combustion furnace 2 according to the present invention, and as shown in FIG.
Primary combustion, ie, about 9 discharged from the primary combustion furnace 1
A first chamber 21 for introducing the primary combustion exhaust gas at 00 ° C. and performing secondary combustion while swirling and lowering, and a second chamber 26 for completing the combustion while raising and swirling the exhaust gas from the first chamber 21 are divided. It is composed. The first chamber 21 and the second chamber 2
6 are both formed in a cylindrical shape, and are provided with a hopper-shaped solid content recovery section 29 for recovering the solid content separated from the gas to be subjected to the secondary combustion treatment, below each of the two chambers 21 and 26.
【００１７】前記第一室２１の上端部には、前記ゴミ焼
却炉１０からの一次燃焼排ガスを導入する一次燃焼ガス
導入部２２と、前記一次燃焼排ガスを二次燃焼させるた
めの、二次空気供給機構からの約２００℃に予熱された
二次空気を供給する二次空気供給部２４とを設けてあ
る。そして、図３（図１におけるＸ−Ｘ断面）に示すよ
うに、前記一次燃焼ガス導入部２２は、上流側の煙道９
に連続して形成してあり、導入した一次燃焼排ガスを炉
内で旋回させるために、導入するガス流が第一室２１の
内壁２１ａに沿って流れるように、前記内壁２１ａの接
線方向に向けて、横に偏向させて配置してある。そし
て、この一次燃焼ガス導入部２２のやや下の位置に、同
様に、供給する二次空気を炉内で旋回させるために、導
入するガス流が第一室２１の内壁２１ａに沿って流れる
ように、前記内壁２１ａの接線方向に向けて、前記一次
燃焼ガス導入部２２の一次燃焼排ガスを吹き込む方向と
ほぼ平行する方向に向けて、前記二次空気を吹き込むよ
うに構成してある。さらに、前記第一室２１の下部に
は、前記固形分回収部２９との境界位置の円筒部に、下
降旋回しながら二次燃焼した排出ガスを前記第二室２６
に送り込むガス排出部２３を備えている。このガス排出
部２３には、前記旋回する排出ガスを排出方向に案内す
る排出案内機構２３ｂを備えている。この排出案内機構
２３ｂは、例えば、図３に示すように構成できる。ま
た、この第一室２１内での二次燃焼を維持するために、
炉内を加熱するバーナ２５を設けてある。このバーナ２
５は、二次燃焼室２０内に導入する一次燃焼排ガスの温
度が低下して二次燃焼を維持しにくくなった場合に、炉
内温度を上昇させるためのもので、前記第一室２１の内
壁２１ａに沿って火炎を形成するように配置してある。
このバーナ２５により加熱することで、前記一次燃焼排
ガスの二次燃焼が安定し、また、必要に応じて再燃させ
ることも可能となる。At the upper end of the first chamber 21, a primary combustion gas introduction section 22 for introducing primary combustion exhaust gas from the refuse incinerator 10 and a secondary air for secondary combustion of the primary combustion exhaust gas are provided. A secondary air supply unit 24 for supplying secondary air preheated to about 200 ° C. from a supply mechanism is provided. Then, as shown in FIG. 3 (cross section XX in FIG. 1), the primary combustion gas introduction unit 22 is connected to the flue 9 on the upstream side.
In order to swirl the introduced primary combustion exhaust gas in the furnace, the introduced gas flow is directed in the tangential direction of the inner wall 21a so that the introduced gas flow flows along the inner wall 21a of the first chamber 21. And are arranged to be deflected sideways. In order to swirl the supplied secondary air in the furnace at a position slightly below the primary combustion gas introduction unit 22, the gas flow to be introduced flows along the inner wall 21 a of the first chamber 21. Further, the secondary air is blown in a direction substantially parallel to a direction in which the primary combustion exhaust gas is blown toward the tangential direction of the inner wall 21a. Further, in the lower part of the first chamber 21, the exhaust gas that has undergone secondary combustion while rotating downward is transferred to the second chamber 26 at a cylindrical portion at a boundary position with the solid content recovery unit 29.
And a gas discharge unit 23 for feeding the gas to the air. The gas discharge section 23 is provided with a discharge guide mechanism 23b for guiding the swirling discharge gas in the discharge direction. The discharge guide mechanism 23b can be configured, for example, as shown in FIG. Further, in order to maintain the secondary combustion in the first chamber 21,
A burner 25 for heating the inside of the furnace is provided. This burner 2
5 is for raising the temperature in the furnace when the temperature of the primary combustion exhaust gas introduced into the secondary combustion chamber 20 decreases and it becomes difficult to maintain the secondary combustion. It is arranged so as to form a flame along the inner wall 21a.
By heating with this burner 25, the secondary combustion of the primary combustion exhaust gas is stabilized, and it is possible to re-burn if necessary.
【００１８】前記第二室２６の下部に位置して、前記固
形分回収部２９との境界位置の円筒部に、前記第一室２
１のガス排出部２３からの排出ガスを導入して二次燃焼
を完結させるべく、ガス導入部２７を設けてある。この
ガス導入部２７には、排出ガスを導入して、上昇旋回さ
せるべく、導入するガス流が第二室２６の内壁２６ａに
沿って流れるように、導入する排出ガスを前記内壁２６
ａの接線方向に向けて案内する導入案内機構２７ｂを備
えている。この導入案内機構２７ｂも、例えば、図３に
示すような導入案内板で構成できる。前記導入案内機構
２７ｂは、前記排出案内機構２３ｂとは逆方向にガスを
偏向させるようにし、前記第二室２６内でのガスの旋回
方向を、前記第一室２１内のガスの旋回方向とは逆にし
てある。そして、前記第二室２６の上端部には、炉内で
二次燃焼を完結した約８００℃の二次燃焼排ガスを煙道
９に向けて排出する燃焼排ガス排出部２８を設けて、下
流側の煙道９に接続してある。At the lower part of the second chamber 26, the first chamber 2
A gas inlet 27 is provided to introduce the exhaust gas from the first gas outlet 23 to complete the secondary combustion. The exhaust gas is introduced into the gas inlet 27 so that the introduced gas flows along the inner wall 26a of the second chamber 26 in order to introduce the exhaust gas and rotate upward.
An introduction guide mechanism 27b that guides the tangential direction of a is provided. The introduction guide mechanism 27b can also be constituted by, for example, an introduction guide plate as shown in FIG. The introduction guide mechanism 27b deflects the gas in a direction opposite to that of the discharge guide mechanism 23b, so that the turning direction of the gas in the second chamber 26 corresponds to the turning direction of the gas in the first chamber 21. Is reversed. At the upper end of the second chamber 26, there is provided a flue gas discharge part 28 for discharging the secondary flue gas of about 800 ° C., which has completed the secondary combustion in the furnace, toward the flue 9, and is provided on the downstream side. Connected to the flue 9.
【００１９】前記排出案内機構２３ｂ及び前記導入案内
機構２７ｂは、例えば図３に示すように構成できる。前
記排出案内機構２３ｂは、前記第二室２６の内壁２６ａ
に開口してガス導入部２７を構成する連通口２７ａに位
置を合わせて開口する前記第一室２１の円筒状の内壁２
１ａに開口してガス排出部２３を構成する連通口２３ａ
を、前記内壁２１ａに沿って流れる炉内の旋回ガス流が
前記連通口２３ａに近接する位置から捕捉して、前記連
通口２３ａに向けて偏向するように設けて半ダクト状に
形成した排出案内板で構成できる。前記導入案内機構２
７ｂは、前記排出案内機構２３ｂによって前記連通口２
３ａに向けて偏流された排出ガスのガス流を、再び偏向
して、前記第二室２６の内壁２６ａに沿うように偏流さ
せる、同様に半ダクト状に形成された導入案内板で構成
できる。このように構成して、前記第一室２１の下部
で、一次燃焼排ガスが下降旋回しながら燃焼した排出ガ
スを、前記第一室２１の内壁２１ａに沿う排ガス流とし
て捕捉し、前記第二室２６の内壁２６ａに沿う向きに偏
流して、前記第二室２６の内壁２６ａに沿って上昇旋回
させつつ、前記一次燃焼排ガスの二次燃焼を完結させ
る。The discharge guide mechanism 23b and the introduction guide mechanism 27b can be configured, for example, as shown in FIG. The discharge guide mechanism 23b is provided on the inner wall 26a of the second chamber 26.
The cylindrical inner wall 2 of the first chamber 21 which is opened at a position aligned with the communication port 27a constituting the gas introduction portion 27
1a, a communication port 23a forming a gas discharge portion 23
Is provided in such a manner that the swirling gas flow in the furnace flowing along the inner wall 21a is captured from a position close to the communication port 23a and is deflected toward the communication port 23a to form a discharge guide formed in a half duct shape. It can be composed of a plate. The introduction guide mechanism 2
7b is connected to the communication port 2 by the discharge guide mechanism 23b.
The gas flow of the exhaust gas deflected toward 3a may be deflected again to be deflected along the inner wall 26a of the second chamber 26, and may be constituted by an introduction guide plate similarly formed in a half duct shape. With this configuration, in the lower part of the first chamber 21, the exhaust gas that the primary combustion exhaust gas burns while descending and turning is captured as an exhaust gas flow along the inner wall 21 a of the first chamber 21, and the second chamber 21 is captured. The secondary combustion of the primary combustion exhaust gas is completed while being swirled in the direction along the inner wall 26a of the second chamber 26 and swirling upward along the inner wall 26a of the second chamber 26.
【００２０】以上のように構成した結果、二次燃焼炉２
において、一次燃焼炉１からの一次燃焼排ガス中の一酸
化炭素を二次燃焼させつつ、固形分を分離するから、そ
の下流側の煙道９内で排ガス中の固形分が沈降すること
を防止し、熱回収装置３の伝熱管３７への固形分の付着
も防止でき、さらに、除塵装置６の除塵負荷も軽減でき
るから、系内の清掃作業の間隔を大きくできると同時
に、メンテナンスを容易にできる。さらに、固形分を除
去しながら一次燃焼排ガスを二次燃焼させるから、ダイ
オキシンの生成を抑制できる上に、適度な酸素雰囲気で
の燃焼を行わせることで、ダイオキシンの生成を一層抑
制できる。また、空気導入により二次燃焼温度が低下し
ても、前記バーナ２５から熱ガスを供給して、前記第一
室２１内の二次燃焼ガスの温度を高めて、導入された一
次燃焼排ガス中のダイオキシンを熱分解させることがで
き、前記バーナ２５による二次燃焼ガスの加熱後の二次
燃焼温度を低くすることで、二次燃焼炉２内での窒素酸
化物の生成も抑制できる。As a result of the above construction, the secondary combustion furnace 2
In the above, since the solid content is separated while carbon monoxide in the primary combustion exhaust gas from the primary combustion furnace 1 is secondarily burned, the solid content in the exhaust gas is prevented from settling in the flue 9 on the downstream side thereof. In addition, since solids can be prevented from adhering to the heat transfer tube 37 of the heat recovery device 3 and the dust removal load of the dust removal device 6 can be reduced, the interval between cleaning operations in the system can be increased and maintenance can be easily performed. it can. Furthermore, since the primary combustion exhaust gas is subjected to secondary combustion while removing solid components, the generation of dioxin can be suppressed, and the generation of dioxin can be further suppressed by performing combustion in an appropriate oxygen atmosphere. Also, even if the secondary combustion temperature is reduced by the introduction of air, the hot gas is supplied from the burner 25 to increase the temperature of the secondary combustion gas in the first chamber 21 so that the introduced primary combustion exhaust gas Can be thermally decomposed, and by lowering the secondary combustion temperature after heating the secondary combustion gas by the burner 25, the generation of nitrogen oxides in the secondary combustion furnace 2 can also be suppressed.
【００２１】前記熱回収装置３は、一例として空気加熱
器３０に構成してある。この空気加熱器３０は、図１に
示すように、上端部に排ガス導入部３３を備えて、上流
側の煙道９に接続された下降流路部３４と、同じく上端
部に排出部３６を備えて、下流側の煙道９に接続してあ
る上昇流路部３５とで構成してあり、前記下降流路部３
４の下端部と前記上昇流路部３５の下端部とを連通接続
して、Ｕ字型の熱交換部３１に形成してある。さらに、
前記両流路部３４，３５の下端部の合流部下方を、器内
を流通する排ガスから分離される固形物を回収する固形
物捕集部３２に形成してある。The heat recovery device 3 is constituted by an air heater 30 as an example. As shown in FIG. 1, the air heater 30 includes an exhaust gas introduction section 33 at an upper end, and a descending flow path section 34 connected to the flue 9 on the upstream side, and a discharge section 36 at the upper end. And an ascending flow path section 35 connected to the flue 9 on the downstream side.
4 and the lower end of the ascending flow path 35 are connected to each other to form a U-shaped heat exchange section 31. further,
The lower portion of the lower end of the two flow paths 34 and 35 is formed below a confluent portion in a solid collecting portion 32 for collecting solids separated from exhaust gas flowing in the vessel.
【００２２】以上のように構成して、前記排ガス導入部
３３から導入された約８００℃の排ガスは、前記熱交換
部３１内を前記伝熱管３７の長さ方向に沿って流通し、
前記伝熱管３７内を対向する方向に流通する空気を加熱
した後、約６００℃に冷却されて前記排出部３６から排
出される。一方、前記伝熱管３７に供給される常温の空
気は、約２００℃に加熱されて前記一次空気及び前記二
次空気として送り出される。この空気加熱器３０は、前
記一次空気供給機構１５及び前記二次空気供給機構２４
を構成している。With the above configuration, the exhaust gas of about 800 ° C. introduced from the exhaust gas introduction unit 33 flows through the heat exchange unit 31 along the length direction of the heat transfer tube 37.
After heating the air flowing in the opposite direction in the heat transfer tube 37, the air is cooled to about 600 ° C. and discharged from the discharge unit 36. On the other hand, the normal temperature air supplied to the heat transfer tube 37 is heated to about 200 ° C. and sent out as the primary air and the secondary air. The air heater 30 includes the primary air supply mechanism 15 and the secondary air supply mechanism 24.
Is composed.
【００２３】前記排ガス冷却装置４は、図１に示したよ
うに、水冷構造の冷却塔４０に形成してあり、円筒状の
本体部４１の下部に上流側からの排ガスを塔内に導入す
る排ガス導入部４２を設け、その上方に、塔内で排ガス
中に冷却水を噴射する水噴射ノズル４５を設けてある。
前記本体部４１の上端部を、下流側の煙道９に接続する
ガス排出部４４に形成し、前記本体部４１の下部を、下
方に向けて次第に小径にした、排ガスから分離される固
形物をさらに回収する固形物捕集部４６に形成してあ
る。この固形物捕集部４６からは、塔内と外部との気密
を維持しながら、前記排ガス導入部４２から塔内に流入
した排ガス中に含まれる固形物が連続的に排出される。As shown in FIG. 1, the exhaust gas cooling device 4 is formed in a cooling tower 40 having a water cooling structure, and introduces exhaust gas from an upstream side into a lower portion of a cylindrical main body portion 41 into the tower. An exhaust gas introduction section 42 is provided, and a water injection nozzle 45 for injecting cooling water into the exhaust gas in the tower is provided above the exhaust gas introduction section 42.
The upper end of the main body 41 is formed in a gas discharge section 44 connected to the flue 9 on the downstream side, and the lower part of the main body 41 is gradually reduced in diameter downward. Is formed in a solid collecting portion 46 for further collecting the solid. The solids contained in the exhaust gas flowing into the tower from the exhaust gas introduction part 42 are continuously discharged from the solids collecting part 46 while maintaining the airtightness between the inside and the outside of the tower.
【００２４】このような構成により、前記冷却水と前記
排ガスとの接触時間を長くし、効果的に排ガスを冷却
し、１５０〜１６０℃に冷却した排ガスを前記ガス排出
部４４から排出するようにしてある。このようにして、
２００〜５００℃の温度域を急速に冷却することで、冷
却過程でのダイオキシンの生成を抑制してある。With such a configuration, the contact time between the cooling water and the exhaust gas is extended, the exhaust gas is cooled effectively, and the exhaust gas cooled to 150 to 160 ° C. is discharged from the gas discharge section 44. It is. In this way,
By rapidly cooling the temperature range of 200 to 500 ° C., generation of dioxin in the cooling process is suppressed.
【００２５】前記排ガス冷却装置４は、排ガス中の塩
酸、ダイオキシン等を除去するガス処理部５の機能も備
えており、前記本体部４１の前記ガス排出部４４のやや
下方にガス処理剤供給部５０を設けてある。このガス処
理剤供給部５０は、図１に示したように、排ガス中に含
まれる塩酸を中和除去する消石灰粉末と、前記排ガス中
のダイオキシンを吸着除去する活性炭粉末とを塔内に供
給する粉体供給機構５１を備えて、前記両粉末を気送す
る気流搬送管として形成してある粉体供給管５２の先端
部をラバル管状の粉体ノズル５３に形成して塔内に開口
させて、混合供給される消石灰粉末と、活性炭粉末と
を、搬送流体である空気と共に塔内に供給するものであ
る。前記粉体ノズル５３から搬送流体である空気が散流
するのに伴い、前記両粉末も塔内に分散し、塔内を緩や
かに上昇する排ガス流に抗して沈降しながら排ガスと接
触して、前記消石灰粉末は前記排ガス中の塩酸を中和除
去し、前記活性炭粉末は前記排ガス中のダイオキシンを
吸着除去しながら、再び排出部４４に向かって流れる。The exhaust gas cooling device 4 also has a function of a gas processing unit 5 for removing hydrochloric acid, dioxin and the like in the exhaust gas, and a gas processing agent supply unit is provided slightly below the gas discharge unit 44 of the main body 41. 50 are provided. As shown in FIG. 1, the gas treating agent supply unit 50 supplies slaked lime powder for neutralizing and removing hydrochloric acid contained in exhaust gas and activated carbon powder for adsorbing and removing dioxin in the exhaust gas into the tower. A powder supply mechanism 51 is provided, and a tip of a powder supply pipe 52 formed as an air flow transport pipe for pneumatically feeding the two powders is formed in a Laval tubular powder nozzle 53 and opened into the tower. The mixed slaked lime powder and the activated carbon powder are supplied into the tower together with air as a carrier fluid. As the air serving as the carrier fluid is scattered from the powder nozzle 53, the two powders are also dispersed in the tower, and come into contact with the exhaust gas while settling against the exhaust gas flow that gradually rises in the tower. The slaked lime powder neutralizes and removes hydrochloric acid in the exhaust gas, and the activated carbon powder flows toward the discharge portion 44 again while adsorbing and removing dioxin in the exhaust gas.
【００２６】前記除塵装置６としては、バグフィルタ装
置６０を配置してある。前記粉塵回収部６５には、回収
塵排出機構６６を備えており、連続的に回収塵を排出で
きるようにしてある。前記回収塵排出機構６６は、落下
する粉塵を粉塵排出口６７に向けて掻き出すスクリュー
コンベア６６ａを設けてあり、前記粉塵排出口６７に
は、外気と遮断した状態で回収塵を連続して排出できる
ように、ロータリバルブ６７ａを備えている。前記バグ
フィルタ６４で除塵した後の排ガスは、ガス排出口６８
から煙道９に放出される。As the dust removing device 6, a bag filter device 60 is disposed. The dust collecting section 65 is provided with a collected dust discharging mechanism 66 so that the collected dust can be continuously discharged. The collecting dust discharging mechanism 66 is provided with a screw conveyor 66a for scraping the falling dust toward the dust discharging port 67, and the dust discharging port 67 can continuously discharge the collected dust in a state where it is shut off from the outside air. Thus, a rotary valve 67a is provided. The exhaust gas after dust removal by the bag filter 64 is supplied to the gas outlet 68.
From the flue 9.
【００２７】前記活性炭吸着塔７は、複数段の活性炭充
填層７１を備える多段接触塔に構成してあり、排ガス入
口７０からの排ガス中に残存する水銀蒸気と残留ダイオ
キシンとを吸着して排ガスを無害化し、排ガス出口７２
から煙道９に送り出すように構成してある。The activated carbon adsorption tower 7 is configured as a multi-stage contact tower having a plurality of activated carbon packed beds 71. The activated carbon adsorption tower 7 adsorbs mercury vapor remaining in the exhaust gas from the exhaust gas inlet 70 and residual dioxin and removes the exhaust gas. Detoxification, exhaust gas outlet 72
From the stack 9 to the flue 9.
【００２８】〔別実施形態〕 〈１〉二次燃焼室２０の第二室２６の導入案内機構２７
ｂを、第一室２１の排出案内機構２３ｂからの排出ガス
を、前記第一室２１内のガスの旋回方向とは逆に旋回さ
せるように構成した例について説明したが、例えば図４
に示すように、前記排出案内機構２３ｂからの排出ガス
を、前記導入案内機構２７ｂで反転流通させるようにし
て、前記第二室２６内のガスの旋回方向を、前記第一室
２１内のガスの旋回方向と同じにしてあってもよい。こ
のように構成すれば、ガス導入部２７で導入される排出
ガスが減速され、固形分の分離が容易になると同時に、
ガス排出部２３から前記ガス導入部２７の間で、ガスが
偏向されて、一時的に排出ガスに作用する遠心力が逆方
向になるから、排出ガスの攪拌が行われ、二次燃焼の完
結が促進される。従って、上記実施の形態で説明した構
成と同様の結果が得られる。また、図５（イ）及び
（ロ）に示すように、前記排出案内機構２３ｂと前記導
入案内機構２７ｂとを連通管Ｐで形成し、両周壁２１
ａ，２６ａの共通接線方向に沿ってこの連通管Ｐを配置
してもよい。同図（イ）は両室２１，２６におけるガス
の旋回方向を逆方向にした例であり、同図（ロ）は両室
２１，２６におけるガスの旋回方向を同方向にした例で
ある。尚、以上は、第一室２１、第二室２６共に円筒状
に形成してある例について説明したが、前記両室２１、
２６は、角筒状のものであってもよい。また、何れか一
室が円筒状で、他室が角筒状であってもよい。 〈２〉上記実施の形態においては、第一室２１にバーナ
２５を設けた例について説明したが、前記バーナ２５を
第二室２６に設けてあってもよい。前記第二室２６では
二次燃焼が完結するから、二次空気を過剰にして比較的
低温で二次燃焼させ、前記バーナ２５を用いて二次燃焼
の完結した後の二次燃焼排ガスを加熱すれば、窒素酸化
物の生成を低減できると同時に、一酸化炭素及び塩素分
の除去された状態で二次燃焼排ガスを十分な酸素雰囲気
で加熱するから、一次燃焼排ガス中のダイオキシンの生
成を抑制し、且つ効果的に分解できる。 〈３〉上記実施の形態においては、除塵装置６の後に活
性炭吸着塔７を設けた例について説明したが、前記活性
炭吸着塔７の活性炭充填層７１に例えば脱硝触媒等の触
媒を共に充填してあってもよい。さらに、前記活性炭吸
着塔７の後又は前に触媒塔を配置し、或いは前記活性炭
吸着塔７に代えて、触媒塔を配置してもよく、上記触媒
としては、Ｔｉ系金属間化合物等を充填すれば脱硝効果
を発揮するから効果的である。 〈４〉前記一次燃焼炉１は、上記実施の形態に示したゴ
ミ焼却炉１０に限られるものではなく、熱ガスを発生す
る炉であれば何れの炉にも本発明は適用可能であり、飛
灰等の排ガス同伴物を多く排ガス中に含有する炉であれ
ば殊に効果的である。従って、廃棄物燃焼処理装置とし
て、廃棄物溶融処理炉、廃棄物熱分解炉、廃棄物燃焼溶
融炉等に本発明に係る二次燃焼炉を備えさせることは殊
に有効である。また、その他の熱ガスを発生する炉とし
ては、例えば製鉄用電気炉、製糸業での黒液ボイラや汚
泥焼却ボイラ、セメントキルン、鉄鋼用の焼結炉、銅・
亜鉛・鉛用精錬炉、アルミニウム溶解炉等の加熱炉があ
り、これらの加熱炉にも適用できる。[Another embodiment] <1> Introduction guide mechanism 27 of second chamber 26 of secondary combustion chamber 20
b, the exhaust gas from the discharge guide mechanism 23b of the first chamber 21 is swirled in a direction opposite to the swirling direction of the gas in the first chamber 21. For example, FIG.
As shown in FIG. 7, the exhaust gas from the discharge guide mechanism 23b is reversed and circulated by the introduction guide mechanism 27b, so that the turning direction of the gas in the second chamber 26 is changed to the gas in the first chamber 21. May be the same as the turning direction. With this configuration, the exhaust gas introduced by the gas introduction unit 27 is decelerated, and the separation of the solid content is facilitated.
Since the gas is deflected between the gas discharge part 23 and the gas introduction part 27 and the centrifugal force acting on the discharge gas is temporarily reversed, the exhaust gas is stirred and the secondary combustion is completed. Is promoted. Therefore, the same result as the configuration described in the above embodiment can be obtained. Further, as shown in FIGS. 5A and 5B, the discharge guide mechanism 23b and the introduction guide mechanism 27b are formed by a communication pipe P,
This communication pipe P may be arranged along the common tangent direction of the communication pipes a and 26a. FIG. 2A shows an example in which the gas swirling directions in both chambers 21 and 26 are reversed, and FIG. 2B shows an example in which the gas swirling directions in both chambers 21 and 26 are the same. In the above, the example in which both the first chamber 21 and the second chamber 26 are formed in a cylindrical shape has been described.
26 may be a rectangular tube. Further, one of the chambers may have a cylindrical shape, and the other chamber may have a rectangular tube shape. <2> In the above embodiment, the example in which the burner 25 is provided in the first chamber 21 has been described. However, the burner 25 may be provided in the second chamber 26. Since the secondary combustion is completed in the second chamber 26, the secondary air is excessively added, and secondary combustion is performed at a relatively low temperature, and the secondary combustion exhaust gas after the completion of the secondary combustion is heated using the burner 25. In this way, the generation of nitrogen oxides can be reduced, and at the same time, the secondary combustion exhaust gas is heated in a sufficient oxygen atmosphere with the carbon monoxide and chlorine removed, so the generation of dioxin in the primary combustion exhaust gas is suppressed. And can be effectively decomposed. <3> In the above embodiment, the example in which the activated carbon adsorption tower 7 is provided after the dust removing device 6 has been described. However, the activated carbon packed bed 71 of the activated carbon adsorption tower 7 is filled with a catalyst such as a denitration catalyst together. There may be. Further, a catalyst tower may be disposed before or after the activated carbon adsorption tower 7, or a catalyst tower may be disposed in place of the activated carbon adsorption tower 7. The catalyst may be filled with a Ti-based intermetallic compound or the like. This is effective because it exhibits a denitration effect. <4> The primary combustion furnace 1 is not limited to the refuse incinerator 10 described in the above embodiment, and the present invention is applicable to any furnace that generates hot gas. It is particularly effective if the furnace contains a large amount of exhaust gas accompanying substances such as fly ash in the exhaust gas. Therefore, it is particularly effective to equip a waste melting treatment furnace, a waste pyrolysis furnace, a waste combustion melting furnace and the like with the secondary combustion furnace according to the present invention as a waste combustion treatment apparatus. Other furnaces that generate hot gas include, for example, electric furnaces for steelmaking, black liquor boilers and sludge incineration boilers in the silk industry, cement kilns, sintering furnaces for steel, copper and
There are heating furnaces such as a refining furnace for zinc and lead and an aluminum melting furnace, and the present invention can also be applied to these heating furnaces.
【図１】本発明に係る二次燃焼炉を適用した廃棄物焼却
設備の一例を示す説明図FIG. 1 is an explanatory diagram showing an example of a waste incineration facility to which a secondary combustion furnace according to the present invention is applied.
【図２】本発明に係る二次燃焼炉の一例を示す縦断面図FIG. 2 is a longitudinal sectional view showing an example of a secondary combustion furnace according to the present invention.
【図３】本発明に係る二次燃焼炉の一例を示す平断面図FIG. 3 is a plan sectional view showing an example of a secondary combustion furnace according to the present invention.
【図４】本発明に係る二次燃焼炉の他の例を示す平断面
図FIG. 4 is a cross-sectional plan view showing another example of the secondary combustion furnace according to the present invention.
【図５】本発明に係る二次燃焼炉の他の例を示す平断面
図FIG. 5 is a cross-sectional plan view showing another example of the secondary combustion furnace according to the present invention.
【図６】従来の二次燃焼炉を適用した廃棄物焼却設備の
一例を示す説明図FIG. 6 is an explanatory diagram showing an example of a waste incineration facility to which a conventional secondary combustion furnace is applied.
１ 一次燃焼炉 ９ 煙道 ２１ 第一室 ２１ａ 内壁 ２２ 一次燃焼ガス導入部 ２３ ガス排出部 ２４ 二次空気供給部 ２５ バーナ ２６ 第二室 ２６ａ 内壁 ２７ ガス導入部 ２８ 燃焼排ガス排出部 ２９ 固形分回収部 DESCRIPTION OF SYMBOLS 1 Primary combustion furnace 9 Flue 21 First chamber 21a Inner wall 22 Primary combustion gas introduction part 23 Gas discharge part 24 Secondary air supply part 25 Burner 26 Second chamber 26a Inner wall 27 Gas introduction part 28 Combustion exhaust gas discharge part 29 Solids recovery Department
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3K078 BA01 BA26 CA02 CA09 CA17 3K091 AA03 AA20 BB01 BB21 FB03 FB35 FB48 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K078 BA01 BA26 CA02 CA09 CA17 3K091 AA03 AA20 BB01 BB21 FB03 FB35 FB48
Claims (4)
る二次燃焼炉であって、 前記一次燃焼炉からの一次燃焼排ガスを導入する一次燃
焼ガス導入部を上下何れか一方に備え、他方にガス排出
部を備えて、上下方向に流路を形成してある第一室と、
前記第一室のガス排出部側の位置に前記一次室からの排
出ガスを導入するガス導入部を備え、前記一次燃焼ガス
導入部側の位置に前記導入したガスを二次燃焼させた後
の二次燃焼排ガスを煙道に向けて排出する燃焼排ガス排
出部を備えて、上下方向に流路を形成してある第二室と
を設けてあり、 前記一次燃焼ガス導入部を、前記第一室の内壁に沿って
前記一次燃焼排ガスを旋回流入させるように横に偏向さ
せて配置すると共に、前記導入した一次燃焼排ガスを二
次燃焼させるための二次空気供給部を横に偏向させて設
けて、前記第一室内で前記一次燃焼排ガスを旋回しつつ
燃焼させるように構成し、 前記ガス導入部を、前記第二室の内壁に沿って前記第一
室からの排出ガスを旋回流入させるように横に偏向させ
て配置して、前記排出ガスが前記第二室内を旋回流通す
るように構成し、 前記第一室及び前記第二室の下方に、前記両室を通過す
るガスから分離される固形分を回収する固形分回収部を
設けてある二次燃焼炉。1. A secondary combustion furnace for secondary combustion of exhaust gas from a primary combustion furnace, wherein a primary combustion gas introduction section for introducing primary combustion exhaust gas from the primary combustion furnace is provided at one of upper and lower sides, and A first chamber having a gas discharge part, and forming a flow path in the vertical direction,
A gas introduction unit for introducing exhaust gas from the primary chamber at a position on the gas discharge unit side of the first chamber, and after the introduced gas is subjected to secondary combustion at a position on the primary combustion gas introduction unit side A second chamber having a flue gas discharge section for discharging the secondary combustion exhaust gas toward the flue; and a second chamber having a flow path formed in the up-down direction. The primary combustion exhaust gas is laterally deflected along the inner wall of the chamber so as to swirl and flow therein, and a secondary air supply unit for secondary combustion of the introduced primary combustion exhaust gas is laterally deflected. The primary combustion exhaust gas is configured to be swirled and burned in the first chamber, and the gas introduction unit is configured to swirl inflow exhaust gas from the first chamber along an inner wall of the second chamber. Deflect sideways so that the exhaust gas The second chamber is configured to circulate and circulate, and below the first chamber and the second chamber, a solid content recovery unit that recovers a solid content separated from the gas passing through the two chambers is provided. Secondary combustion furnace.
ガスを加熱するためのバーナを設けてある請求項１記載
の二次燃焼炉。2. The secondary combustion furnace according to claim 1, wherein a burner for heating the introduced primary combustion exhaust gas is provided in the first chamber.
の上方に配置して、前記一次燃焼排ガスが旋回しながら
下降しつつ二次燃焼するように構成する共に、前記燃焼
排ガス排出部を、前記第二室の上方に配置して、前記第
一室からの排出ガスが旋回しながら上昇するように構成
してある請求項１又は２に記載の二次燃焼炉。3. The primary combustion gas introduction section is arranged above the first chamber so that the primary combustion exhaust gas performs secondary combustion while rotating and descending, and the combustion exhaust gas discharge section. 3. The secondary combustion furnace according to claim 1, wherein the second combustion chamber is disposed above the second chamber so that exhaust gas from the first chamber rises while turning. 4.
回方向と、前記第二室における排出ガスの旋回方向とを
互いに逆方向にしてある請求項３記載の二次燃焼炉。4. The secondary combustion furnace according to claim 3, wherein the swirling direction of the primary combustion exhaust gas in the first chamber and the swirling direction of the exhaust gas in the second chamber are opposite to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10278484A JP2000111025A (en) | 1998-09-30 | 1998-09-30 | Secondary combustion furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10278484A JP2000111025A (en) | 1998-09-30 | 1998-09-30 | Secondary combustion furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000111025A true JP2000111025A (en) | 2000-04-18 |
Family
ID=17597979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10278484A Pending JP2000111025A (en) | 1998-09-30 | 1998-09-30 | Secondary combustion furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000111025A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101005745B1 (en) | 2008-12-31 | 2011-01-07 | 한국항공우주연구원 | Low NOx combustor |
| JP2016133286A (en) * | 2015-01-21 | 2016-07-25 | 大陽日酸株式会社 | Exhaust gas treatment method and exhaust gas treatment device |
| KR20160144085A (en) * | 2015-06-08 | 2016-12-16 | 조성훈 | Apparatus for re-combustion and apparatus for manufacturing mineral fiber comprising the same |
| CN109925834A (en) * | 2019-04-16 | 2019-06-25 | 韩继鹏 | A kind of Chemical Manufacture vent gas treatment environmental protection equipment |
| US10549496B2 (en) | 2015-06-08 | 2020-02-04 | Billion Sung Hoon ZORH | Apparatus for manufacturing mineral fiber |
-
1998
- 1998-09-30 JP JP10278484A patent/JP2000111025A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101005745B1 (en) | 2008-12-31 | 2011-01-07 | 한국항공우주연구원 | Low NOx combustor |
| JP2016133286A (en) * | 2015-01-21 | 2016-07-25 | 大陽日酸株式会社 | Exhaust gas treatment method and exhaust gas treatment device |
| US10502417B2 (en) | 2015-01-21 | 2019-12-10 | Taiyo Nippon Sanso Corporation | Exhaust gas treatment method and exhaust gas treatment device |
| KR20160144085A (en) * | 2015-06-08 | 2016-12-16 | 조성훈 | Apparatus for re-combustion and apparatus for manufacturing mineral fiber comprising the same |
| KR101690417B1 (en) * | 2015-06-08 | 2016-12-27 | 조성훈 | Apparatus for re-combustion and apparatus for manufacturing mineral fiber comprising the same |
| US10549496B2 (en) | 2015-06-08 | 2020-02-04 | Billion Sung Hoon ZORH | Apparatus for manufacturing mineral fiber |
| CN109925834A (en) * | 2019-04-16 | 2019-06-25 | 韩继鹏 | A kind of Chemical Manufacture vent gas treatment environmental protection equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1759941B (en) | New type heating and fusing method and equipment for dealing with flying ash generated by burning garbage | |
| JPH01500251A (en) | How to reduce NOx in flue gas | |
| CZ2195A3 (en) | Improved process for producing cement in long cement kilns | |
| EP0467923A1 (en) | Sludge incineration in single-stage combustor with gas scrubbing followed by afterburning and heat recovery. | |
| CN113310056A (en) | Hazardous waste incineration treatment system and method | |
| JP2006266537A (en) | Waste treatment facility for treating refuse and sludge together | |
| JP6286517B1 (en) | Incinerator | |
| JP2000111025A (en) | Secondary combustion furnace | |
| JP2007127355A (en) | Rubbish incinerating/melting method and device therefor | |
| KR100654478B1 (en) | A method and apparatus for reducing a feed material in a rotary hearth furnace | |
| JP2013164226A (en) | Waste material incinerator and waste material incinerating method | |
| JP3423265B2 (en) | Chemical injection and treatment method in pre-coated bag filter device | |
| JP6541039B2 (en) | Incineration ash processing apparatus and incineration ash processing method | |
| JP2007187338A (en) | Waste gas treatment method and apparatus for ash melting furnace | |
| JP2000199620A (en) | Incinerating heat treating furnace for refuse | |
| WO2000022348A1 (en) | Waste disposal device | |
| JP3343328B2 (en) | Apparatus and method for melting wet ash | |
| KR100484616B1 (en) | Apparatus for combustion having heating storage type combustion mat for reducing dioxin for controlling the same | |
| JP2000111020A (en) | Heat recovery device | |
| JP2793451B2 (en) | How to reduce dioxins in waste incinerators | |
| JP2014211243A (en) | Combustion control system for refuse incinerator | |
| TWI391610B (en) | A circulating fluidized bed, an operating system having the circulating fluidized bed, and a driving method of the circulating fluidized bed | |
| JP3628732B2 (en) | Combustion gas cooling equipment | |
| JPH04302909A (en) | Method and apparatus for treating waste | |
| JP3374020B2 (en) | Waste pyrolysis melting system |