JPH07332642A - Garbage incinerator - Google Patents
Garbage incineratorInfo
- Publication number
- JPH07332642A JPH07332642A JP6122193A JP12219394A JPH07332642A JP H07332642 A JPH07332642 A JP H07332642A JP 6122193 A JP6122193 A JP 6122193A JP 12219394 A JP12219394 A JP 12219394A JP H07332642 A JPH07332642 A JP H07332642A
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- Prior art keywords
- temperature
- combustion
- oxygen gas
- zone
- air
- 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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- Incineration Of Waste (AREA)
- Air Supply (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、投入されたゴミを搬送
しながら乾燥処理する乾燥帯と、乾燥されたゴミを搬送
しながら燃焼処理する燃焼帯とを備えたストーカ式の焼
却処理帯と、炉出口部に前記焼却処理帯で発生した燃焼
ガスを完全燃焼させる二次燃焼用空気供給機構を設けて
あるゴミ焼却炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stoker type incineration treatment zone provided with a drying zone for carrying out a drying process while transporting thrown-in dust and a burning zone for carrying out a burning process while transporting the dried dust. The present invention relates to a refuse incinerator having a secondary combustion air supply mechanism for completely combusting the combustion gas generated in the incineration treatment zone at the furnace outlet.
【０００２】[0002]
【従来の技術】この種の焼却炉は、図７に示すように、
投入されたゴミを搬送しながら乾燥処理する乾燥帯Ａ
と、乾燥されたゴミを搬送しながら燃焼処理する燃焼帯
Ｂとを備えたストーカ式の焼却処理帯と、炉出口部２に
前記焼却処理帯で発生した燃焼ガスを完全燃焼させる二
次燃焼用空気供給機構１３と、炉出口温度、即ち、前記
炉出口部２における燃焼ガスの温度を検出する温度検出
機構１５を設けて、検出温度が一酸化炭素の燃焼に必要
とされる温度（一般には約８００℃以上といわれてい
る）を確保できるように、二次燃焼用空気供給機構１３
からの空気供給量を調節する制御手段Ｄを設けていた。
即ち、制御手段Ｄは、炉出口温度が目標温度よりも低下
すると、冷却効果によりさらなる低温化を回避すべく二
次燃焼用空気量を制限するように構成していた。2. Description of the Related Art This type of incinerator, as shown in FIG.
Drying zone A for drying while throwing in the introduced dust
And a stoker-type incineration treatment zone having a combustion zone B for carrying out combustion treatment while transporting dried dust, and for secondary combustion for completely burning combustion gas generated in the incineration treatment zone at the furnace outlet 2 An air supply mechanism 13 and a temperature detection mechanism 15 for detecting the furnace outlet temperature, that is, the temperature of the combustion gas in the furnace outlet section 2 are provided so that the detected temperature is the temperature required for combustion of carbon monoxide (generally, It is said that the temperature is said to be about 800 ° C or higher), so that the secondary combustion air supply mechanism 13 can be secured.
The control means D for adjusting the amount of air supplied from
That is, when the furnace outlet temperature becomes lower than the target temperature, the control means D is configured to limit the secondary combustion air amount in order to avoid further lowering of the temperature due to the cooling effect.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上述した従来
の二次燃焼用空気の供給量制御では、二次燃焼用空気の
供給量が不足すると不完全燃焼が生じ、二次燃焼用空気
の供給量が過多になると冷却効果により燃焼ガス温度が
低下して、やはり不完全燃焼を生じることになるので、
ダイオキシンの発生量と相関がある一酸化炭素の発生量
の低減には限界があった。本発明の目的は、上述の問題
点を解決して、完全燃焼をより促進できるゴミ焼却炉を
提供する点にある。However, in the above-described conventional supply amount control of secondary combustion air, incomplete combustion occurs when the supply amount of secondary combustion air is insufficient, and the supply of secondary combustion air is caused. If the amount is too large, the combustion gas temperature will drop due to the cooling effect, which will also cause incomplete combustion.
There was a limit to the reduction of carbon monoxide generation, which is correlated with the amount of dioxins generated. An object of the present invention is to solve the above-mentioned problems and to provide a refuse incinerator capable of further promoting complete combustion.
【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
本発明によるゴミ焼却炉の特徴構成は、炉出口部の温度
を検出する温度検出機構を設けるとともに、前記炉出口
部を通過した排ガス中に含まれる酸素ガス濃度を検出す
る酸素ガス濃度検出機構を設けて、前記温度検出機構に
よる検出温度が目標温度となり、且つ、前記酸素ガス濃
度検出機構による検出酸素ガス濃度が目標酸素ガス濃度
となるように、前記二次燃焼用空気供給機構による空気
供給量を調節する送風量制御手段を設けてある点にあ
る。In order to achieve this object, the characteristic constitution of the refuse incinerator according to the present invention is that a temperature detecting mechanism for detecting the temperature of the furnace outlet is provided and that the exhaust gas passing through the furnace outlet is Is provided with an oxygen gas concentration detection mechanism for detecting the oxygen gas concentration, and the temperature detected by the temperature detection mechanism becomes a target temperature, and the oxygen gas concentration detected by the oxygen gas concentration detection mechanism becomes a target oxygen gas concentration. Thus, there is provided an air flow rate control means for adjusting the air supply amount by the secondary combustion air supply mechanism.
【０００５】[0005]
【作用】送風量制御手段は、二次燃焼用空気供給機構に
よる空気供給量を調節するに際して、先ず、炉出口部の
温度を検出する温度検出機構により検出された温度が、
一酸化炭素の燃焼に必要な所定の目標温度に維持される
ように送風量を調節して、二次燃焼空気の過剰供給によ
る冷却効果を防止して完全燃焼を促進するのであるが、
炉出口部の温度が目標値に維持されていても酸素ガス濃
度が低ければ完全燃焼を達成できないために、その調節
状態に対して、さらに、酸素ガス濃度検出機構により検
出された排ガス中に含まれる酸素ガス濃度を、炉出口部
での燃焼に必要な酸素濃度の評価値として採用し、一酸
化炭素の燃焼に十分に適した所定の目標酸素ガス濃度に
維持されるように送風量を調節して、燃焼状態を良好に
調節するのである。When adjusting the amount of air supplied by the secondary combustion air supply mechanism, the air flow rate control means first detects the temperature detected by the temperature detection mechanism for detecting the temperature at the furnace outlet.
The amount of air blown is adjusted so as to be maintained at a predetermined target temperature necessary for the combustion of carbon monoxide, and the cooling effect due to the excessive supply of secondary combustion air is prevented to promote complete combustion.
Even if the temperature at the furnace outlet is maintained at the target value, complete combustion cannot be achieved if the oxygen gas concentration is low.Therefore, it is included in the exhaust gas detected by the oxygen gas concentration detection mechanism for the adjusted state. The oxygen gas concentration that is used is adopted as the evaluation value of the oxygen concentration required for combustion at the furnace outlet, and the air flow rate is adjusted so that it is maintained at a predetermined target oxygen gas concentration that is well suited for carbon monoxide combustion. Then, the combustion state is satisfactorily adjusted.
【０００６】[0006]
【発明の効果】本発明によれば、炉出口部で確保すべき
燃焼温度及び酸素ガス濃度に基づいて二次燃焼用空気の
供給量を調節できるので、燃焼ガスの完全燃焼化が促進
できるゴミ焼却炉を提供することができるようになっ
た。According to the present invention, since the supply amount of the secondary combustion air can be adjusted based on the combustion temperature and the oxygen gas concentration to be secured at the outlet of the furnace, it is possible to promote the complete combustion of the combustion gas. It is now possible to provide an incinerator.
【０００７】[0007]
【実施例】以下に実施例を説明する。ゴミ焼却炉は、図
１に示すように、被焼却物であるゴミを焼却する燃焼室
１と、発生した排ガスの熱を利用して発電する発電装置
８と、排ガスを浄化する排ガス処理装置９等で構成して
ある。EXAMPLES Examples will be described below. As shown in FIG. 1, the refuse incinerator includes a combustion chamber 1 for incinerating refuse, which is an object to be incinerated, a power generator 8 for generating power by using heat of exhaust gas generated, and an exhaust gas treatment device 9 for purifying exhaust gas. Etc.
【０００８】燃焼室１には、ゴミが集積されたホッパ３
の下端部に設けたプッシャ３ｂにより投入されたゴミを
乾燥させ着火点近傍まで加熱する乾燥帯Ａと、乾燥され
たゴミを燃焼させる燃焼帯Ｂと、燃焼帯Ｂで燃焼したゴ
ミをほぼ完全に灰化する後燃焼帯Ｃとからなる焼却処理
帯５を上方から下方に階段状に配置して構成してある。In the combustion chamber 1, a hopper 3 in which dust is accumulated
Of the dust injected by the pusher 3b provided at the lower end of the dry zone A for heating the dust to the vicinity of the ignition point, the combustion zone B for burning the dried dust, and the dust burned in the combustion zone B is almost completely ashed. The incineration zone 5 including the post-combustion zone C which becomes solid is arranged in a stepwise manner from the upper side to the lower side.
【０００９】各焼却処理帯５は、固定の火格子と可動の
火格子とを搬送方向に沿って交互に配置して、油圧シリ
ンダ（図示せず）により可動の火格子を斜め上下方向に
往復摺動させてゴミを搬送処理するものである。後燃焼
帯Ｃで灰化したゴミは灰押し出し装置１１に落下し、灰
出しコンベア１２により灰ピット４に搬送集積される。In each incineration zone 5, fixed grate and movable grate are alternately arranged along the conveying direction, and the movable grate is reciprocated diagonally up and down by a hydraulic cylinder (not shown). Sliding is performed to convey and treat dust. The dust ashed in the post-combustion zone C falls on the ash extrusion device 11 and is conveyed and accumulated in the ash pit 4 by the ash extraction conveyor 12.
【００１０】乾燥帯Ａ、燃焼帯Ｂ、及び、後燃焼帯Ｃの
下部には、それぞれ風箱６ａ，６ｂ，６ｃを設けて、送
風機６ｅにより供給路６ｄを介して燃焼用の空気を供給
する一次燃焼用空気供給機構６を設けてあり、供給路６
ｄの一部に空気予熱器６ｆを設けて乾燥帯Ａには加熱さ
れた空気を乾燥の空気として供給するように構成してあ
る。ここに、空気予熱器６ｆは、後述の廃熱ボイラ７で
発生し発電装置８から回収した蒸気を利用して熱交換す
るものであり、後述の温度制御手段１６により供給蒸気
量を調節することにより燃焼用空気を常温から約１６０
℃までの間で可変に調節できるように構成してある。Below the drying zone A, the combustion zone B, and the post-combustion zone C, air boxes 6a, 6b, 6c are provided, respectively, and air for combustion is supplied by a blower 6e through a supply path 6d. The primary combustion air supply mechanism 6 is provided, and the supply path 6
An air preheater 6f is provided in a part of d so that heated air is supplied to the drying zone A as dry air. Here, the air preheater 6f is for exchanging heat using the steam generated in the waste heat boiler 7 described later and recovered from the power generation device 8, and the amount of supplied steam is adjusted by the temperature control means 16 described later. Combustion air from room temperature to about 160
It is configured so that it can be variably adjusted up to ℃.
【００１１】炉出口部２の上流側には、焼却処理帯５で
発生した燃焼ガスを完全燃焼させるべく、ブロアファン
とダンパと空気ノズルとでなる二次燃焼用空気供給機構
１３を設けてあり、炉出口部２で燃焼した後の排ガス
は、廃熱ボイラ７によって発電装置８のエネルギーとし
て利用すべく熱エネルギーが蒸気の形で取り出され、電
気集塵機や洗煙装置等の排ガス処理装置９を介して煙突
１０から排気される。On the upstream side of the furnace outlet 2, a secondary combustion air supply mechanism 13 including a blower fan, a damper and an air nozzle is provided in order to completely burn the combustion gas generated in the incineration zone 5. The exhaust gas after combustion at the furnace outlet 2 is taken out in the form of steam as thermal energy for use as energy of the power generator 8 by the waste heat boiler 7, and the exhaust gas treatment device 9 such as an electric dust collector or a smoke washing device is used. It is exhausted from the chimney 10 via the.
【００１２】乾燥帯Ａの上壁面に乾燥帯Ａの上方空間の
温度を検出する熱電対利用の温度検出機構１４、炉出口
部２の側壁面に炉出口部２を通過するガスの温度を検出
する熱電対利用の温度検出機構１５をそれぞれ設けると
ともに、排ガス処理装置９の出口に酸素ガス濃度検出機
構１９を設けて、乾燥帯Ａに配置された温度検出機構１
４による検出温度を目標温度に調節し、さらに、炉出口
部２に配置された温度検出機構１５による検出温度を目
標温度に調節するとともに酸素ガス濃度検出機構１９に
よる検出酸素ガス濃度を目標値に調節するコンピュータ
利用の制御手段Ｄを備えてある。A temperature detecting mechanism 14 using a thermocouple for detecting the temperature of the space above the drying zone A on the upper wall surface of the drying zone A, and the temperature of the gas passing through the furnace outlet 2 on the side wall surface of the furnace outlet 2. A temperature detection mechanism 15 using a thermocouple is provided, and an oxygen gas concentration detection mechanism 19 is provided at the outlet of the exhaust gas treatment device 9 so that the temperature detection mechanism 1 arranged in the drying zone A is provided.
The temperature detected by 4 is adjusted to the target temperature, the temperature detected by the temperature detecting mechanism 15 arranged at the furnace outlet 2 is adjusted to the target temperature, and the oxygen gas concentration detected by the oxygen gas concentration detecting mechanism 19 is set to the target value. A computer-based control means D for adjusting is provided.
【００１３】制御手段Ｄは、乾燥帯Ａに設置された温度
検出機構１４による検出温度が目標温度となるように、
一次燃焼用空気供給機構６による乾燥帯Ａへの供給空気
温度を調節する温度制御手段１６と、同じく温度検出機
構１４による検出温度が目標温度となるように、乾燥帯
Ａと燃焼帯Ｂによるゴミの搬送速度比を調節する速度制
御手段１７と、炉出口部２に設置された温度検出機構１
５による検出温度が目標温度となり、酸素ガス濃度検出
機構１９による検出酸素ガス濃度が目標値となるよう
に、二次燃焼用空気供給機構１３による炉出口部２への
供給空気量を調節する送風量制御手段１８とで構成して
ある。The control means D controls the temperature detected by the temperature detection mechanism 14 installed in the drying zone A to reach the target temperature.
The temperature control means 16 for adjusting the temperature of the air supplied to the drying zone A by the primary combustion air supply mechanism 6, and the dust by the drying zone A and the combustion zone B so that the temperature detected by the temperature detecting mechanism 14 also becomes the target temperature. Speed control means 17 for adjusting the conveyance speed ratio of the sheet and the temperature detection mechanism 1 installed at the furnace outlet 2.
5 is a target temperature, and the oxygen gas concentration detection mechanism 19 detects the oxygen gas concentration to be a target value. The secondary combustion air supply mechanism 13 adjusts the amount of air supplied to the furnace outlet 2. It is composed of the air volume control means 18.
【００１４】図２に示すように、乾燥帯Ａの上方空間に
おける温度と、炉出口部２の下流側に配置された集塵機
等の排ガス処理装置９の出口における一酸化炭素濃度と
の間には非常に強い相関関係があり、温度制御手段１６
は、乾燥帯Ａの上方空間の温度、つまり温度検出機構１
４による検出温度が、排ガス処理装置９の出口における
一酸化炭素濃度を十分低減させうる目標温度を確保でき
るように、その目標温度を下回ると、一次燃焼用空気供
給機構６における空気予熱器６ｆでの熱交換量を増して
乾燥帯Ａへの供給空気温度を上昇させることにより、乾
燥帯Ａにおけるゴミの乾燥を促進して燃焼状態を良好に
調節するのである。ここに、供給空気量を増加させると
ＮＯｘの発生量が増加するので、供給空気量はほぼ一定
に維持される。As shown in FIG. 2, between the temperature in the space above the drying zone A and the carbon monoxide concentration at the outlet of the exhaust gas treatment device 9 such as a dust collector arranged downstream of the furnace outlet 2. There is a very strong correlation, and the temperature control means 16
Is the temperature of the space above the dry zone A, that is, the temperature detection mechanism 1
When the temperature detected by No. 4 becomes lower than the target temperature so that the carbon monoxide concentration at the outlet of the exhaust gas treatment device 9 can be sufficiently reduced, the air preheater 6f in the primary combustion air supply mechanism 6 can operate. The amount of heat exchange is increased to raise the temperature of the air supplied to the drying zone A, whereby the drying of dust in the drying zone A is promoted and the combustion state is satisfactorily adjusted. Here, when the supply air amount is increased, the amount of NOx generated increases, so that the supply air amount is maintained substantially constant.
【００１５】さらに、速度制御手段１７は、乾燥帯Ａの
上方空間の温度が目標温度を下回ると、乾燥帯Ｂのゴミ
質が悪いと判断して燃焼帯Ｂに対する乾燥帯Ａのゴミの
搬送速度比を小さくして、水分を多く含んだ質の悪いゴ
ミを乾燥帯で十分に乾燥させるとともに、燃焼帯Ｂでの
燃焼状態の悪化を回避するのである。Further, when the temperature of the space above the drying zone A falls below the target temperature, the speed control means 17 determines that the quality of dust in the drying zone B is poor, and the speed at which the dust in the drying zone A is conveyed to the combustion zone B. The ratio is set to be small so that the poor quality dust containing a large amount of water is sufficiently dried in the dry zone, and the deterioration of the combustion state in the combustion zone B is avoided.
【００１６】つまり、乾燥帯Ａの上方空間の温度は、燃
焼帯Ｂにおけるガス燃焼の輻射熱に依存するので、ゴミ
の燃え始めの位置が上流側に来ればそれだけ乾燥帯Ａの
上方空間の温度は上昇し、反対にゴミの燃え始めの位置
が下流側に来ればそれだけ乾燥帯Ａの上方空間の温度は
低下する。そこで、一次燃焼用の空気温度を上昇させる
ことにより乾燥速度を早め、或いは、燃焼帯Ｂに対する
乾燥帯Ａの搬送速度比率を落として乾燥時間を稼ぐこと
によりゴミの燃え始めの位置を上流側に調節するのであ
る。That is, since the temperature of the upper space of the dry zone A depends on the radiant heat of gas combustion in the combustion zone B, the temperature of the upper space of the dry zone A is as much as the dust start position is upstream. The temperature of the space above the drying zone A decreases as the dust starts to burn on the downstream side. Therefore, the drying temperature is increased by increasing the temperature of the air for primary combustion, or the conveyance speed ratio of the drying zone A to the combustion zone B is reduced to increase the drying time, so that the position where dust starts burning is moved to the upstream side. Adjust it.
【００１７】送風量制御手段１８は、予め定められた炉
内への供給空気量（例えば、一次燃焼用空気：二次燃焼
用空気＝２５０００Ｎｍ3：５０００Ｎｍ3）に対して、
酸素ガス濃度検出機構１９による検出酸素ガス濃度に基
づいて二次燃焼用空気の供給量を調節する第一送風量制
御手段１８ａと、炉出口部２に設置された温度検出機構
１５による検出温度に基づいて、第一送風量制御手段１
８ａにより調節された二次燃焼用空気の供給量を、さら
に調節する第二送風量制御手段１８ｂとからなる。The air flow rate control means 18 is provided with respect to a predetermined air supply amount into the furnace (for example, primary combustion air: secondary combustion air = 25000 Nm 3 : 5000 Nm 3 ).
The first blown air amount control means 18a for adjusting the supply amount of the secondary combustion air based on the oxygen gas concentration detected by the oxygen gas concentration detection mechanism 19 and the temperature detected by the temperature detection mechanism 15 installed at the furnace outlet 2 are set. Based on the first air flow rate control means 1
And a second air flow rate control means 18b for further adjusting the supply amount of the secondary combustion air adjusted by 8a.
【００１８】第一送風量制御手段１８ａは、図６（イ）
に示すように、酸素ガス濃度検出機構１９による検出酸
素ガス濃度が、目標値である約８．５％に対して±１％
以内であればそのままの値を維持し、１％から２％の範
囲で高ければ供給空気量を線型的に５０％まで減少さ
せ、それ以上高ければ５０％の減少状態を維持する一
方、１％から２％の範囲で低ければ供給空気量を線型的
に１５０％まで増加させ、それ以上低ければ１５０％の
増加状態を維持する。つまり、酸素ガス濃度が約８．５
％前後から上方に逸脱すれば、供給空気が燃焼に生かさ
れずに却って冷却されると判断して制限し、逆に酸素ガ
ス濃度が約８．５％前後から下方に逸脱すれば、供給空
気が不足すると判断して増加させることにより、一酸化
炭素の燃焼状態を良好に調節する。The first air flow rate control means 18a is shown in FIG.
As shown in, the oxygen gas concentration detected by the oxygen gas concentration detection mechanism 19 is ± 1% with respect to the target value of about 8.5%.
If it is within the range, the value is maintained as it is, if it is high in the range of 1% to 2%, the supply air amount is linearly reduced to 50%, and if it is higher than that, the reduction state of 50% is maintained, while 1% If it is low in the range from 1 to 2%, the supply air amount is linearly increased to 150%, and if it is lower than that, the increase state of 150% is maintained. That is, the oxygen gas concentration is about 8.5.
%, The supply air is judged to be cooled rather than being used for combustion if deviated upward from around%, and conversely, if the oxygen gas concentration deviates downward from around 8.5%, the supply air is reduced. The combustion state of carbon monoxide is satisfactorily adjusted by determining that it is insufficient and increasing it.
【００１９】第二送風量制御手段１８ｂは、図６（ロ）
に示すように、炉出口部２に設置された温度検出機構１
５による検出温度が、目標値である約９００℃に対して
１０００℃までの範囲では温度が上昇するにつれて供給
空気量を線型的に２００％まで増加させ、それ以上高け
れば２００％の増加状態を維持する一方、８００℃まで
の範囲で低ければ供給空気量を線型的に５０％まで減少
させ、それ以上低ければ５０％の減少状態を維持する。
つまり、図３に示すように、炉出口部２に設置された温
度検出機構１５による検出温度、つまり、炉出口温度が
約９００℃であれば、炉出口部２の下流側に配置された
集塵機等の排ガス処理装置９の出口における一酸化炭素
濃度を低く抑えることができる点から、目標温度を９０
０℃に設定するものであり、炉出口温度が９００℃より
も高温になれば空気供給量を増すことによる冷却効果を
利用して、炉出口部２の下流側が異常な高温になること
を防止し、逆に９００℃よりも低温になれば空気供給量
を減らして冷却効果による温度低下を防止して燃焼ガス
の完全燃焼化を促進する。The second air flow rate control means 18b is shown in FIG.
As shown in FIG. 1, the temperature detection mechanism 1 installed at the furnace outlet 2
The temperature detected by 5 linearly increases the amount of supply air to 200% as the temperature rises in the range up to 1000 ° C from the target value of 900 ° C. On the other hand, if the temperature is low up to 800 ° C., the supply air amount is linearly reduced to 50%, and if it is lower than that, the reduction state of 50% is maintained.
That is, as shown in FIG. 3, if the temperature detected by the temperature detection mechanism 15 installed in the furnace outlet section 2, that is, the furnace outlet temperature is about 900 ° C., the dust collector arranged downstream of the furnace outlet section 2 will be described. The target temperature is set to 90% from the viewpoint that the carbon monoxide concentration at the outlet of the exhaust gas treatment device 9 such as
The temperature is set to 0 ° C, and when the furnace outlet temperature becomes higher than 900 ° C, the cooling effect by increasing the air supply amount is used to prevent the downstream side of the furnace outlet portion 2 from becoming an abnormally high temperature. On the contrary, when the temperature becomes lower than 900 ° C., the air supply amount is reduced to prevent the temperature from lowering due to the cooling effect and promote the complete combustion of the combustion gas.
【００２０】水分を多く含んだ質の悪いゴミを焼却処理
する場合に、図５に示すように、乾燥帯Ａの上方空間の
温度が約８００℃を下回ると一酸化炭素濃度が５０ｐｐ
ｍ以上発生する傾向があるが、上述の制御により乾燥帯
Ａの上方空間の温度を約８００℃以上に調節すると一酸
化炭素濃度を３０ｐｐｍ以下に抑制することができるの
である。さらに、炉出口部２での二次燃焼用空気供給量
を調節することにより一酸化炭素濃度を２０ｐｐｍ以下
に抑制することができるのである。In the case of incineration of poor quality dust containing a large amount of water, as shown in FIG. 5, when the temperature of the space above the drying zone A falls below about 800 ° C., the carbon monoxide concentration becomes 50 pp.
However, if the temperature in the upper space of the drying zone A is adjusted to about 800 ° C. or higher by the above control, the carbon monoxide concentration can be suppressed to 30 ppm or lower. Further, the carbon monoxide concentration can be suppressed to 20 ppm or less by adjusting the secondary combustion air supply amount at the furnace outlet 2.
【００２１】以下に別実施例を説明する。先の実施例で
は、温度制御手段１６による一次燃焼用の空気温度の調
節範囲を常温から１６０℃としたが、これに限定するも
のではなく、炉の規模や焼却処理帯の材質等に応じて適
宜設定できる。Another embodiment will be described below. In the above-described embodiment, the temperature range for adjusting the temperature of the primary combustion air by the temperature control means 16 is from room temperature to 160 ° C. However, the range is not limited to this, and may be changed depending on the scale of the furnace and the material of the incineration zone. It can be set appropriately.
【００２２】先の実施例では、乾燥帯Ａの上方空間の目
標温度を８００℃以上として、その上限温度については
特に限定していないが、余り高温になると電気集塵機等
の排ガス処理装置の耐熱限界を超えることになるので、
ある程度の値に制限する必要がある。そこで、例えば約
８５０℃を上限として、その値を超える場合には、温度
制御手段１６により乾燥帯Ａに供給する乾燥用空気温度
を低下させ、或いは、速度制御手段１７により乾燥帯Ａ
と燃焼帯Ｂによるゴミの搬送速度比を調節することによ
り、ゴミの燃え始め位置を下流側に移動させるか燃焼状
態を制限するように調節する必要がある。In the above embodiment, the target temperature of the upper space of the drying zone A is set to 800 ° C. or higher, and the upper limit temperature is not particularly limited, but if it becomes too high, the heat resistance limit of the exhaust gas treating device such as the electrostatic precipitator is increased. Because it will exceed
It is necessary to limit it to a certain value. Therefore, for example, when the upper limit is about 850 ° C. and the value exceeds the upper limit, the temperature of the drying air supplied to the drying zone A is lowered by the temperature control means 16, or the drying zone A is controlled by the speed control means 17.
It is necessary to adjust the dust transfer speed ratio by the combustion zone B to move the burning start position of the dust to the downstream side or to limit the combustion state.
【００２３】先の実施例では、乾燥帯Ａの上方空間の目
標温度を８００℃以上としたが、この温度に限定するも
のではなく、炉の規模等に応じて得られる乾燥帯Ａの上
方空間における温度と一酸化炭素濃度との間の相関関係
に基づいて、効果的に一酸化炭素濃度を低減できる温度
であればその値は問わない。In the above embodiment, the target temperature of the upper space of the drying zone A is set to 800 ° C. or higher, but the target temperature is not limited to this temperature, and the upper space of the drying zone A obtained according to the scale of the furnace or the like. The value is not limited as long as it is a temperature at which the carbon monoxide concentration can be effectively reduced based on the correlation between the temperature and the carbon monoxide concentration.
【００２４】先の実施例では、温度制御手段１６、及
び、速度制御手段１７の双方により乾燥帯Ａの上方空間
の温度を調節するものを説明したが、乾燥帯Ａの上方空
間の温度を調節するためには、それらのいずれか一方の
みであっても構わない。In the above embodiment, the temperature control means 16 and the speed control means 17 both adjust the temperature of the space above the drying zone A, but the temperature of the space above the drying zone A is adjusted. In order to do so, only one of them may be used.
【００２５】先の実施例では、乾燥帯Ａの上壁面に、乾
燥帯Ａの上方空間の温度を検出する熱電対利用の温度検
出機構１４を設けた例を説明したが、この取り付け位置
は、乾燥帯Ａの上方空間で炉出口部２の上流側であれば
いずれであってもよいし、その数を限定するものではな
く複数取り付けるものであってもよい。In the previous embodiment, an example in which the temperature detecting mechanism 14 using a thermocouple for detecting the temperature of the space above the drying zone A is provided on the upper wall surface of the drying zone A has been described. Any number may be used as long as it is upstream of the furnace outlet 2 in the space above the drying zone A, and the number is not limited, and a plurality may be attached.
【００２６】先の実施例では、乾燥帯Ａの上空の温度を
調節し、且つ、二次燃焼用空気量を調節する制御手段Ｄ
について説明したが、そのいずれか一方のみを制御する
ものであってもよい。In the above embodiment, the control means D for adjusting the temperature of the air above the drying zone A and for adjusting the amount of secondary combustion air.
However, only one of them may be controlled.
【００２７】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されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.
【図１】ゴミ焼却炉の全体構成図[Fig. 1] Overall structure of the garbage incinerator
【図２】実験結果の説明図FIG. 2 Explanatory diagram of experimental results
【図３】実験結果の説明図FIG. 3 is an explanatory diagram of experimental results.
【図４】実験結果の説明図FIG. 4 is an explanatory diagram of experimental results.
【図５】実験結果の説明図FIG. 5 is an explanatory diagram of experimental results.
【図６】制御特性説明図FIG. 6 is an explanatory diagram of control characteristics.
【図７】従来例を示す焼却炉の概略構成図FIG. 7 is a schematic configuration diagram of an incinerator showing a conventional example.
２ 炉出口部 １３ 二次燃焼用空気供給機構 １５ 温度検出手段 １８ 送風量制御手段 １９ 酸素ガス濃度検出機構 Ａ 乾燥帯 Ｂ 燃焼帯 2 Furnace outlet 13 Secondary combustion air supply mechanism 15 Temperature detection means 18 Air flow rate control means 19 Oxygen gas concentration detection mechanism A Dry zone B Combustion zone
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２３Ｌ 9/00 ＺＡＢ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location F23L 9/00 ZAB
Claims (1)
する乾燥帯（Ａ）と、乾燥されたゴミを搬送しながら燃
焼処理する燃焼帯（Ｂ）とを備えたストーカ式の焼却処
理帯と、炉出口部（２）に前記焼却処理帯で発生した燃
焼ガスを完全燃焼させる二次燃焼用空気供給機構（１
３）を設けてあるゴミ焼却炉であって、 前記炉出口部（２）の温度を検出する温度検出機構（１
５）を設けるとともに、前記炉出口部（２）を通過した
排ガス中に含まれる酸素ガス濃度を検出する酸素ガス濃
度検出機構（１９）を設けて、前記温度検出機構（１
５）による検出温度が目標温度となり、且つ、前記酸素
ガス濃度検出機構（１９）による検出酸素ガス濃度が目
標酸素ガス濃度となるように、前記二次燃焼用空気供給
機構（１３）による空気供給量を調節する送風量制御手
段（１８）を設けてあるゴミ焼却炉。1. A stoker-type incineration treatment zone comprising a drying zone (A) for carrying out a drying process while transporting thrown-in dust and a combustion zone (B) for carrying out a burning process while transporting the dried dust. The secondary combustion air supply mechanism (1) for completely combusting the combustion gas generated in the incineration treatment zone at the furnace outlet (2)
3) A refuse incinerator provided with a temperature detecting mechanism (1) for detecting the temperature of the furnace outlet (2).
5) and an oxygen gas concentration detection mechanism (19) for detecting the concentration of oxygen gas contained in the exhaust gas that has passed through the furnace outlet section (2), and the temperature detection mechanism (1
Air supply by the secondary combustion air supply mechanism (13) so that the temperature detected by 5) becomes the target temperature and the oxygen gas concentration detected by the oxygen gas concentration detection mechanism (19) becomes the target oxygen gas concentration. A refuse incinerator provided with a blower amount control means (18) for adjusting the amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6122193A JPH07332642A (en) | 1994-06-03 | 1994-06-03 | Garbage incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6122193A JPH07332642A (en) | 1994-06-03 | 1994-06-03 | Garbage incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07332642A true JPH07332642A (en) | 1995-12-22 |
Family
ID=14829877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6122193A Pending JPH07332642A (en) | 1994-06-03 | 1994-06-03 | Garbage incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07332642A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025078A1 (en) * | 1996-12-06 | 1998-06-11 | Nkk Corporation | Burning apparatus and method for restricting the occurrence of dioxins |
| WO1998043018A1 (en) | 1997-03-26 | 1998-10-01 | Nkk Corporation | Combustion control method and apparatus for waste incinerators |
| JP2007271226A (en) * | 2006-03-31 | 2007-10-18 | Dowa Holdings Co Ltd | Combustion control method and combustion device |
| CN103115362A (en) * | 2013-01-17 | 2013-05-22 | 向家莹 | Oxygen-enriched combustion method ensuring dioxin emission in garbage incinerator reaching standard |
| CN111735059A (en) * | 2020-05-15 | 2020-10-02 | 安徽建筑大学 | Waste incineration chain furnace with front dehumidification system for improving air supply temperature |
-
1994
- 1994-06-03 JP JP6122193A patent/JPH07332642A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025078A1 (en) * | 1996-12-06 | 1998-06-11 | Nkk Corporation | Burning apparatus and method for restricting the occurrence of dioxins |
| US6189461B1 (en) | 1996-12-06 | 2001-02-20 | Nkk Corporation | Burning apparatus and method for restricting the occurrence of dioxins |
| US6435113B1 (en) | 1996-12-06 | 2002-08-20 | Nkk Corporation | Incineration apparatus and method which suppress generation of dioxins |
| WO1998043018A1 (en) | 1997-03-26 | 1998-10-01 | Nkk Corporation | Combustion control method and apparatus for waste incinerators |
| EP1382906A2 (en) * | 1997-03-26 | 2004-01-21 | Nkk Corporation | Combustion control method and apparatus for waste incinerators |
| EP1382906A3 (en) * | 1997-03-26 | 2004-01-28 | Nkk Corporation | Combustion control method and apparatus for waste incinerators |
| JP2007271226A (en) * | 2006-03-31 | 2007-10-18 | Dowa Holdings Co Ltd | Combustion control method and combustion device |
| CN103115362A (en) * | 2013-01-17 | 2013-05-22 | 向家莹 | Oxygen-enriched combustion method ensuring dioxin emission in garbage incinerator reaching standard |
| CN111735059A (en) * | 2020-05-15 | 2020-10-02 | 安徽建筑大学 | Waste incineration chain furnace with front dehumidification system for improving air supply temperature |
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