JPH05272733A - Incinerator - Google Patents
IncineratorInfo
- Publication number
- JPH05272733A JPH05272733A JP7049492A JP7049492A JPH05272733A JP H05272733 A JPH05272733 A JP H05272733A JP 7049492 A JP7049492 A JP 7049492A JP 7049492 A JP7049492 A JP 7049492A JP H05272733 A JPH05272733 A JP H05272733A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- secondary combustion
- region
- detecting means
- temperature detecting
- 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、投入された被燃焼物を
攪拌搬送しながら燃焼させる一次燃焼領域と、その一次
燃焼領域で発生した燃焼ガスに二次燃焼ガスを供給して
完全燃焼させる二次燃焼領域とを備えた還元二段燃焼方
式の焼却炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary combustion region in which an input burned material is burned while being agitated and conveyed, and a secondary combustion gas is supplied to the combustion gas generated in the primary combustion region for complete combustion. The present invention relates to a reduction two-stage combustion type incinerator having a secondary combustion region.
【０００２】[0002]
【従来の技術】還元二段燃焼方式の焼却炉は、ＮＯｘの
発生を低減する目的で構成されたものであり、一次燃焼
領域での高温（約１０００℃近傍）燃焼により発生する
ＮＯｘを還元しながら、一次燃焼領域より低温（約８０
０℃近傍）の二次燃焼領域でその還元反応等で発生した
未燃ガスをＮＯｘが発生しないように酸化する焼却炉で
ある。しかし、近年、ダイオキシン発生量と正の相関関
係があるといわれる一酸化炭素の発生量を低減する必要
があるために、比較的低温度でガスセンサ設置可能な煙
突の前段領域に排ガスの一酸化炭素含有量を計測する一
酸化炭素濃度計を設けて、その値により二次燃焼ガスの
供給量を調節することが考えられている。2. Description of the Related Art A reducing two-stage combustion type incinerator is designed to reduce the generation of NOx and reduces NOx generated by high temperature (about 1000 ° C.) combustion in the primary combustion region. However, the temperature is lower than the primary combustion region (about 80
It is an incinerator that oxidizes unburned gas generated by the reduction reaction in the secondary combustion region (near 0 ° C.) so that NOx is not generated. However, in recent years, since it is necessary to reduce the amount of carbon monoxide generated, which is said to have a positive correlation with the amount of dioxin generated, it is necessary to reduce the amount of carbon monoxide in the exhaust gas in the preceding region of the stack where the gas sensor can be installed at a relatively low temperature. It is considered that a carbon monoxide concentration meter for measuring the content is provided and the supply amount of the secondary combustion gas is adjusted depending on the value.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上述した焼却
炉では、一般に被焼却物の質（ゴミ質）により一酸化炭
素濃度が頻繁に増減することがあり、一酸化炭素濃度計
の値により二次燃焼ガスの供給量を調節する場合には、
その距離的原因で応答の遅れが発生して、一酸化炭素濃
度が高くなる初期には燃焼ガスが不足してダイオキシン
発生量が多くなったり、一酸化炭素濃度が低くなる初期
には逆にＮＯｘが発生するというおそれがあった。本発
明の目的は、上述した従来欠点を解消する点にある。However, in the above-mentioned incinerator, the carbon monoxide concentration may generally increase and decrease depending on the quality (dust quality) of the material to be incinerated. When adjusting the supply amount of secondary combustion gas,
Due to the distance, a delay in response occurs, and in the early stage when the carbon monoxide concentration is high, the combustion gas is insufficient and the amount of dioxin is increased, or in the early stage when the carbon monoxide concentration is low, conversely NOx. Could occur. An object of the present invention is to eliminate the above-mentioned conventional drawbacks.
【０００４】[0004]
【課題を解決するための手段】この目的を達成するため
本発明による焼却炉の特徴構成は、二次燃焼領域の上流
側と下流側にそれぞれ温度検出手段を設けて、下流側の
温度検出手段による検出温度が上流側の温度検出手段に
よる検出温度より高い場合に二次燃焼ガスの供給量を増
加する供給量調節手段を設けてある点にある。In order to achieve this object, the incinerator according to the present invention is characterized in that the temperature detecting means is provided on the upstream side and the downstream side of the secondary combustion region, and the temperature detecting means on the downstream side is provided. There is provided a supply amount adjusting means for increasing the supply amount of the secondary combustion gas when the temperature detected by the above is higher than the temperature detected by the temperature detecting means on the upstream side.
【０００５】[0005]
【作用】二次燃焼領域の上流側と下流側にそれぞれ設け
た温度検出手段による検出温度に基づき燃焼ガス中の一
酸化炭素濃度を間接的に検出して、供給量調節手段によ
り間接的に検出された一酸化炭素濃度に基づき二次燃焼
ガスの供給量を加減調節するのである。例えば、燃焼ガ
ス中の一酸化炭素等の未燃ガス濃度が高くなると、二次
燃焼領域において頻繁に酸化反応が行われ下流側の温度
が上流側の温度より高くなることに着目して、この場合
に供給量調節手段により二次燃焼ガスの供給量を増加調
節して酸化反応を促進して完全燃焼させるのである。[Function] The concentration of carbon monoxide in the combustion gas is indirectly detected based on the temperature detected by the temperature detecting means provided on the upstream side and the downstream side of the secondary combustion region, and indirectly detected by the supply amount adjusting means. The amount of secondary combustion gas supplied is adjusted based on the concentration of carbon monoxide thus obtained. For example, when the concentration of unburned gas such as carbon monoxide in the combustion gas becomes high, the oxidation reaction is frequently performed in the secondary combustion region and the temperature on the downstream side becomes higher than the temperature on the upstream side. In this case, the supply amount adjusting means increases and controls the supply amount of the secondary combustion gas to promote the oxidation reaction and complete combustion.
【０００６】[0006]
【発明の効果】本発明の焼却炉によれば、特殊で効果な
ガスセンサを用いることなく熱電対等の汎用の温度セン
サを用いることで容易に、且つ、応答遅れなく二次燃焼
ガスの供給量調節を行いうる焼却炉を提供できるように
なった。According to the incinerator of the present invention, the supply amount of the secondary combustion gas can be adjusted easily by using a general-purpose temperature sensor such as a thermocouple without using a special and effective gas sensor. It is now possible to provide an incinerator that can perform
【０００７】[0007]
【実施例】以下に実施例を説明する。都市ゴミ用の焼却
炉は、図１に示すように、投入されたゴミを焼却する燃
焼室１と、その燃焼室１への投入ゴミを一時的に溜める
ホッパ３と、ホッパ３の下部に設けられゴミを前記燃焼
室１へ少量づつ投入するプッシャ２と、燃焼室１で焼却
された灰を集める灰ピット４等を備えて構成してある。EXAMPLES Examples will be described below. As shown in FIG. 1, the incinerator for municipal waste is provided with a combustion chamber 1 for incinerating the input dust, a hopper 3 for temporarily storing the input dust in the combustion chamber 1, and a lower portion of the hopper 3. It comprises a pusher 2 for throwing the refuse into the combustion chamber 1 little by little, an ash pit 4 for collecting the ash burned in the combustion chamber 1, and the like.
【０００８】燃焼室１は、投入されたゴミを攪拌搬送し
ながら乾燥させる乾燥帯Ａ、燃焼させる燃焼帯Ｂ、灰化
する後燃焼帯Ｃへと順次搬送しながら被焼却物を灰ピッ
ト４へ落下させる搬送手段５を設け、その左右側壁６の
下部に搬送手段５の中央に向かい送風することで火炎を
前記側壁６から遠ざけて側壁６を冷却する送風手段７
と、搬送手段５の下方から燃焼用の空気を供給する燃焼
空気供給手段８を設けてある。詳述すると、前記搬送手
段５は、固定火格子に対して移動火格子を油圧シリンダ
（図示せず）で斜め上下方向に摺動することで、燃焼空
気供給手段８からの燃焼用空気とゴミを攪拌しながら灰
ピット４方向へ搬送する。[0008] In the combustion chamber 1, the incinerated matter is conveyed to the ash pit 4 while sequentially conveying the thrown dust to a drying zone A for drying while stirring and transporting it, a combustion zone B for burning, and a post combustion zone C for ashing. Blower 7 for cooling the side wall 6 by providing a conveying means 5 for dropping and blowing air toward the center of the conveyer 5 under the left and right side walls 6 to keep the flame away from the side wall 6 and cool the side wall 6.
A combustion air supply means 8 for supplying combustion air from below the conveying means 5 is provided. More specifically, the conveying means 5 slidably moves the moving grate relative to the fixed grate in a vertical direction with a hydraulic cylinder (not shown), so that the combustion air and dust from the combustion air supply means 8 are removed. Is transported to the ash pit 4 while stirring.
【０００９】燃焼帯Ｂの近傍空間が被焼却物を８００℃
から１０００℃で燃焼する一次燃焼領域Ｒ１となり、そ
の一次燃焼領域Ｒ１の上方空間が、乾燥帯Ａで発生する
還元性ガスと燃焼帯Ｂでの燃焼ガスとを混合して燃焼ガ
ス中に含まれるＮＯｘを還元する還元領域Ｒ３となり、
さらにその上方空間で幅狭の煙道を形成する領域が、一
酸化炭素等の未燃ガスを前記一次燃焼領域Ｒ１よりも低
温の８００℃近傍で燃焼させる二次燃焼領域Ｒ２とな
る。二次燃焼領域Ｒ２を構成する前記煙道の側壁の上流
側と下流側にそれぞれ熱電対でなる燃焼ガス温度検出手
段Ｔ１，Ｔ２を設けるとともに、二次燃焼ガスとしての
空気を外部から吸引するブロアファンＦと二次燃焼ガス
の供給量を調節するダンパ機構Ｄと煙道側壁の複数箇所
に設けたノズルＮとでなる二次燃焼ガス供給手段を設け
てある。前記二次燃焼ガス供給手段には、前記燃焼ガス
温度検出手段Ｔ１，Ｔ２の検出温度に基づいてダンパ機
構Ｄの開度調節を行う供給量調節手段を設けてある。詳
述すると、二次燃焼による発生熱量を考慮しても常温外
気を供給するために、上流側の温度検出手段Ｔ１による
検出温度に対して下流側の温度検出手段Ｔ２による検出
温度は通常数十度低い。しかし、ゴミ質の変動等により
二次燃焼領域Ｒ２における一酸化炭素濃度が大である場
合には燃焼反応が異常に促進され、上流側の温度検出手
段Ｔ１による検出温度に対して下流側の温度検出手段Ｔ
２による検出温度の方が高くなる場合があり、この場合
には、供給量調節手段はダンパ機構Ｄの開度を大にして
空気供給量を増加する。逆に、二次燃焼領域Ｒ２におけ
る一酸化炭素濃度が小である場合には燃焼反応が低減
し、上流側の温度検出手段Ｔ１による検出温度に対して
下流側の温度検出手段Ｔ２による検出温度の方が異常に
低くなる場合があり、この場合には、低温による燃焼反
応の停滞を防止すべく供給量調節手段はダンパ機構Ｄの
開度を小にして空気供給量を減少する。通常、二次燃焼
空気の供給量は、燃焼に必要な空気量の約１．７倍を標
準設定とし、１．５から２．０の範囲で増減制御する。The space near the combustion zone B stores the incineration object at 800 ° C.
Becomes the primary combustion region R1 that burns at 1000 ° C. to 1000 ° C., and the space above the primary combustion region R1 contains the reducing gas generated in the dry zone A and the combustion gas in the combustion zone B in the combustion gas. It becomes a reduction region R3 that reduces NOx,
Further, the region where a narrow flue is formed in the space above it becomes the secondary combustion region R2 in which unburned gas such as carbon monoxide is burned at a temperature near 800 ° C. which is lower than the primary combustion region R1. Blowers for sucking air as secondary combustion gas from the outside while providing combustion gas temperature detecting means T1 and T2 composed of thermocouples on the upstream side and the downstream side of the side wall of the flue which constitutes the secondary combustion region R2, respectively. A secondary combustion gas supply means including a fan F, a damper mechanism D for adjusting the supply amount of the secondary combustion gas, and nozzles N provided at a plurality of positions on the side wall of the flue is provided. The secondary combustion gas supply means is provided with supply amount adjusting means for adjusting the opening degree of the damper mechanism D based on the temperatures detected by the combustion gas temperature detecting means T1, T2. More specifically, in order to supply the ambient temperature outside air even if the amount of heat generated by the secondary combustion is taken into consideration, the temperature detected by the temperature detecting means T1 on the upstream side is usually several tens of degrees as compared with the temperature detected by the temperature detecting means T1 on the upstream side. Low degree. However, when the concentration of carbon monoxide in the secondary combustion region R2 is high due to fluctuations in the quality of dust, the combustion reaction is abnormally promoted, and the temperature on the downstream side with respect to the temperature detected by the temperature detecting means T1 on the upstream side is increased. Detection means T
The temperature detected by 2 may become higher, and in this case, the supply amount adjusting means increases the opening amount of the damper mechanism D to increase the air supply amount. On the contrary, when the carbon monoxide concentration in the secondary combustion region R2 is small, the combustion reaction is reduced, and the temperature detected by the temperature detecting means T2 on the downstream side is lower than the temperature detected by the temperature detecting means T1 on the upstream side. In some cases, the supply amount adjusting means decreases the opening amount of the damper mechanism D to reduce the air supply amount in order to prevent the combustion reaction from stagnating due to low temperature. Normally, the supply amount of the secondary combustion air is set to about 1.7 times the amount of air required for combustion as a standard setting, and the increase / decrease is controlled in the range of 1.5 to 2.0.
【００１０】前記煙道の下流には廃熱ボイラ１２を設け
てあり、燃焼室１で発生した燃焼熱エネルギィが蒸気の
形で取り出され発電機１３のエネルギィに供される。さ
らに、排ガスは電気集塵機等からなる排ガス処理設備１
４によりばいじんや有害ガスが除去されて煙突１５から
排気される。A waste heat boiler 12 is provided downstream of the flue, and combustion heat energy generated in the combustion chamber 1 is taken out in the form of steam and used for energy of a power generator 13. Further, the exhaust gas is an exhaust gas treatment facility 1 including an electric dust collector, etc.
Dust and harmful gas are removed by 4 and exhausted from the chimney 15.
【００１１】以下に別実施例を説明する。先の実施例で
は、二次燃焼ガスとして空気を用いた場合を説明した
が、二次燃焼ガスとしては、空気以外に、例えば酸素冨
化ガスや燃料ガスであってもよい。Another embodiment will be described below. In the above embodiment, the case where air is used as the secondary combustion gas has been described, but the secondary combustion gas may be, for example, oxygen enriched gas or fuel gas other than air.
【００１２】尚、特許請求の範囲の項に図面との対照を
便利にする為に符号を記すが、該記入により本発明は添
付図面の構成に限定するものではない。It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図１】焼却炉の概略構成図FIG. 1 Schematic diagram of incinerator
Ｒ１ 一次燃焼領域 Ｒ２ 二次燃焼領域 Ｔ１，Ｔ２ 温度検出手段 R1 primary combustion region R2 secondary combustion region T1, T2 temperature detection means
Claims (1)
燃焼させる一次燃焼領域（Ｒ１）と、その一次燃焼領域
（Ｒ１）で発生した燃焼ガスに二次燃焼ガスを供給して
完全燃焼させる二次燃焼領域（Ｒ２）とを備えた還元二
段燃焼方式の焼却炉であって、 前記二次燃焼領域（Ｒ２）の上流側と下流側にそれぞれ
温度検出手段（Ｔ１),（Ｔ２）を設けて、下流側の温度
検出手段（Ｔ２）による検出温度が上流側の温度検出手
段（Ｔ１）による検出温度より高い場合に二次燃焼ガス
の供給量を増加する供給量調節手段を設けてある焼却
炉。1. A primary combustion region (R1) in which an input burned material is burned while being stirred and conveyed, and a secondary combustion gas is supplied to the combustion gas generated in the primary combustion region (R1) to complete combustion. A reducing two-stage combustion type incinerator having a secondary combustion region (R2), wherein temperature detecting means (T1), (T2) are provided on the upstream side and the downstream side of the secondary combustion region (R2), respectively. Provided is a supply amount adjusting means for increasing the supply amount of the secondary combustion gas when the temperature detected by the temperature detecting means (T2) on the downstream side is higher than the temperature detected by the temperature detecting means (T1) on the upstream side. Incinerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7049492A JPH05272733A (en) | 1992-03-27 | 1992-03-27 | Incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7049492A JPH05272733A (en) | 1992-03-27 | 1992-03-27 | Incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05272733A true JPH05272733A (en) | 1993-10-19 |
Family
ID=13433134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7049492A Pending JPH05272733A (en) | 1992-03-27 | 1992-03-27 | Incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05272733A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147729A (en) * | 1999-11-01 | 2002-05-22 | Nkk Corp | Refuse incinerator |
| CN109798528A (en) * | 2018-12-06 | 2019-05-24 | 上海金山环境再生能源有限公司 | Feed device for waste incinerator |
-
1992
- 1992-03-27 JP JP7049492A patent/JPH05272733A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147729A (en) * | 1999-11-01 | 2002-05-22 | Nkk Corp | Refuse incinerator |
| CN109798528A (en) * | 2018-12-06 | 2019-05-24 | 上海金山环境再生能源有限公司 | Feed device for waste incinerator |
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