JPH08121724A - Incinerating device - Google Patents
Incinerating deviceInfo
- Publication number
- JPH08121724A JPH08121724A JP6257893A JP25789394A JPH08121724A JP H08121724 A JPH08121724 A JP H08121724A JP 6257893 A JP6257893 A JP 6257893A JP 25789394 A JP25789394 A JP 25789394A JP H08121724 A JPH08121724 A JP H08121724A
- Authority
- JP
- Japan
- Prior art keywords
- secondary combustion
- combustion gas
- combustion
- flue
- gas supply
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Landscapes
- Incineration Of Waste (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ゴミを焼却するストー
カ式の焼却処理帯を備えた一次燃焼領域の上方空間に煙
道を形成して二次燃焼領域とし、前記煙道の下流側に排
ガスから熱回収する廃熱ボイラを備えたゴミ焼却炉と、
前記廃熱ボイラからの発生蒸気を過熱する燃焼式過熱器
と、前記燃焼式過熱器による過熱蒸気で発電する蒸気タ
ービンを備えた発電装置とからなり、前記燃焼式過熱器
からの燃焼排ガスを、酸素濃度を低くした状態で前記二
次燃焼領域に導く二次燃焼ガス供給路を設けてあるゴミ
焼却装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary combustion area formed by forming a flue in an upper space of a primary combustion area provided with a stoker-type incineration treatment zone for incinerating dust, and the flue is provided downstream of the flue. A waste incinerator equipped with a waste heat boiler that recovers heat from exhaust gas,
Combustion type superheater that superheats the generated steam from the waste heat boiler, and a power generation device that includes a steam turbine that generates power with superheated steam by the combustion type superheater, and combustion exhaust gas from the combustion type superheater, The present invention relates to a dust incinerator provided with a secondary combustion gas supply passage that guides the secondary combustion region to the secondary combustion region with a low oxygen concentration.
【０００２】[0002]
【従来の技術】この種のゴミ焼却炉は、図４に示すよう
に、二次燃焼領域におけるガス温度の低下を防止して完
全燃焼を促進し、一酸化炭素や一酸化炭素の発生量と正
の相関があるダイオキシンの発生を抑制すべく、煙道４
の上流側で、且つ、焼却処理帯３の上流側に、二次燃焼
ガスを噴射する二次燃焼ガス供給機構１５を設けて、燃
焼式過熱器８からの高温の燃焼排ガスを、酸素濃度を低
くした状態で二次燃焼領域に導くべく、前記二次燃焼ガ
ス供給機構１５に供給する前記二次燃焼ガス供給路１４
を設けていた。2. Description of the Related Art This type of refuse incinerator, as shown in FIG. 4, prevents a decrease in the gas temperature in the secondary combustion region and promotes complete combustion, thereby reducing the amount of carbon monoxide and carbon monoxide generated. Flue 4 to suppress the generation of dioxins that have a positive correlation
The secondary combustion gas supply mechanism 15 for injecting the secondary combustion gas is provided on the upstream side of the combustion incineration zone 3 and the high temperature combustion exhaust gas from the combustion type superheater 8 is supplied with oxygen concentration. The secondary combustion gas supply passage 14 that supplies the secondary combustion gas supply mechanism 15 to guide the secondary combustion region in the lowered state.
Was provided.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上述した従来
のゴミ焼却炉では、二次燃焼ガス供給機構１５を、煙道
４の上流側で、且つ、焼却処理帯３の上流側に設けてい
たために、そのような位置から噴入された燃焼用のガス
では、焼却処理帯３の上流側を構成する乾燥帯Ａにおい
て発生した可燃性ガスを有効に燃焼させ得るものではな
いという欠点があった。However, in the above-mentioned conventional refuse incinerator, the secondary combustion gas supply mechanism 15 is provided upstream of the flue 4 and upstream of the incineration zone 3. In addition, the combustion gas injected from such a position has a drawback in that the combustible gas generated in the dry zone A constituting the upstream side of the incineration zone 3 cannot be effectively burned. .
【０００４】つまり、水流による流れの可視化実験によ
れば、乾燥帯Ａで発生した可燃性ガスはそのまま上昇し
て上方の壁面４ｂに沿って層をなして煙道４へ流れ、焼
却処理帯３の下流側を構成する燃焼帯Ｂでの燃焼ガス流
と均一に混合されることなく層をなして煙道４に導かれ
ることが判明したため、従来の二次燃焼ガス供給機構１
５により高速で噴入される燃焼用ガスでは、その様な可
燃性ガス流を突き抜けて燃焼帯Ｂの上方空間に到ること
となり燃焼に有効に寄与するものではなかったという問
題点があった。That is, according to the flow visualization experiment by the water flow, the combustible gas generated in the dry zone A rises as it is, flows into the flue 4 in layers along the upper wall surface 4b, and the incineration zone 3 It was found that the gas was introduced into the flue 4 in layers without being uniformly mixed with the combustion gas flow in the combustion zone B constituting the downstream side of the conventional secondary combustion gas supply mechanism 1
However, the combustion gas injected at a high speed due to No. 5 penetrates through such a flammable gas flow and reaches the space above the combustion zone B, which does not contribute effectively to combustion. .
【０００５】また、煙道４の入口断面における酸素濃度
分布を求めると、図２（イ）に示すように、乾燥帯Ａ側
では約８％、燃焼帯Ｂ側では約１５％という大きな濃度
勾配があり、このような濃度勾配を維持したままで煙道
へ流れると、煙道４の乾燥帯Ａ側では酸素不足による不
完全燃焼を起こし、逆に煙道４の燃焼帯Ｂ側では窒素酸
化物が発生するおそれがあり、そのような問題を回避す
るためには、高価な排ガス処理装置等をさらに設ける必
要があり、結局、設備費が嵩むという問題点があった。When the oxygen concentration distribution in the inlet cross section of the flue 4 is obtained, as shown in FIG. 2A, a large concentration gradient of about 8% on the dry zone A side and about 15% on the combustion zone B side is obtained. When flowing into the flue while maintaining such a concentration gradient, incomplete combustion due to lack of oxygen occurs on the dry zone A side of the flue 4, and conversely nitrogen oxidation on the combustion zone B side of the flue 4. There is a possibility that a product may be generated, and in order to avoid such a problem, it is necessary to further provide an expensive exhaust gas treatment device and the like, and there is a problem that the equipment cost eventually increases.
【０００６】一方、従来の二次燃焼ガス供給機構１５か
らの供給ガス圧を低下すれば、可燃性ガス流を突き抜け
るという不都合は解消されるものの、乾燥帯側を流れる
可燃性ガスの流速に応じた適切な二次空気量が常に供給
できるものではなく、煙道４の燃焼帯Ｂ側での窒素酸化
物の発生を低減させるということができない。On the other hand, if the supply gas pressure from the conventional secondary combustion gas supply mechanism 15 is reduced, the inconvenience of penetrating the combustible gas flow is solved, but it depends on the flow rate of the combustible gas flowing through the dry zone side. Moreover, an appropriate amount of secondary air cannot always be supplied, and the generation of nitrogen oxides on the combustion zone B side of the flue 4 cannot be reduced.
【０００７】本発明の目的は、上述の問題点に鑑みて、
二次燃焼領域において、温度低下を引き起こすことのな
い状態で燃焼ガスを均一拡散して、完全燃焼を促進しな
がら同時に窒素酸化物の発生を低減させることが可能な
ゴミ焼却装置を提供する点にある。The object of the present invention is to solve the above problems.
In the secondary combustion region, to provide a refuse incinerator capable of uniformly diffusing combustion gas in a state that does not cause a temperature drop and promoting complete combustion while simultaneously reducing the generation of nitrogen oxides. is there.
【０００８】[0008]
【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、煙道の上流側
で、且つ、焼却処理帯の下流側に、前記焼却処理帯の下
流側から上流側に向けて二次燃焼ガスを噴射する二次燃
焼ガス供給機構を設けて、二次燃焼ガス供給路を前記二
次燃焼ガス供給機構に接続してある点にある。In order to achieve this object, the characteristic structure of the refuse incinerator according to the present invention is that the upstream side of the flue and the downstream side of the incineration zone, the downstream side of the incineration zone. The secondary combustion gas supply mechanism for injecting the secondary combustion gas from the upstream side to the upstream side is provided, and the secondary combustion gas supply path is connected to the secondary combustion gas supply mechanism.
【０００９】上述の構成において、ゴミ焼却炉の排ガス
中に含まれる酸素濃度を検出するガスセンサを設けて、
前記ガスセンサによる検出酸素濃度が所定の目標値に維
持されるように、前記二次燃焼ガス供給機構からの二次
燃焼ガスの噴射量を調節する二次燃焼ガス供給量調節機
構を設けてあることが好ましい。In the above structure, a gas sensor for detecting the oxygen concentration contained in the exhaust gas of the refuse incinerator is provided,
A secondary combustion gas supply amount adjustment mechanism for adjusting the injection amount of the secondary combustion gas from the secondary combustion gas supply mechanism is provided so that the oxygen concentration detected by the gas sensor is maintained at a predetermined target value. Is preferred.
【００１０】上述の構成において、ゴミ焼却炉の排ガス
温度を検出する温度センサを設けて、前記温度センサに
よる検出排ガス温度が所定の目標値に維持されるよう
に、前記二次燃焼ガス供給機構からの二次燃焼ガスの噴
射量を調節する二次燃焼ガス供給量調節機構を設けてあ
ることが好ましい。In the above structure, a temperature sensor for detecting the exhaust gas temperature of the refuse incinerator is provided, and the exhaust gas temperature detected by the temperature sensor is maintained at a predetermined target value from the secondary combustion gas supply mechanism. It is preferable to provide a secondary combustion gas supply amount adjusting mechanism for adjusting the injection amount of the secondary combustion gas.
【００１１】[0011]
【作用】二次燃焼ガス供給機構を、煙道の上流側で、且
つ、焼却処理帯の下流側に、前記焼却処理帯の下流側か
ら上流側に向けて二次燃焼ガスを噴射するように設けて
あるので、そのような二次燃焼ガス供給機構から噴射さ
れた二次燃焼ガスは、煙道の燃焼帯側（焼却処理帯の下
流側）に流入する酸素濃度の高い燃焼ガスを巻き込みな
がら、煙道の乾燥帯側（焼却処理帯の上流側）に流入す
る酸素濃度の低い未燃ガスに向かって流れる結果、煙道
での燃焼ガスの均一拡散が促進されるのである。このと
き、一次燃焼領域で生じた燃焼ガスには二次燃焼に必要
とされる量の酸素が既に含まれており、二次燃焼領域で
二次燃焼ガスとして通常の空気を供給する場合には、酸
素過多となり却って窒素酸化物の発生量が上昇するおそ
れがあるので、燃焼式過熱器からの高温の燃焼排ガスを
酸素濃度を低くした状態で供給することで過剰酸素供給
による窒素酸化物の発生を防止するとともに、二次燃焼
領域での燃焼温度を高温に維持して二次燃焼を促進する
のである。In the secondary combustion gas supply mechanism, the secondary combustion gas is injected upstream of the flue and downstream of the incineration zone from the downstream side to the upstream side of the incineration zone. Since it is provided, the secondary combustion gas injected from such a secondary combustion gas supply mechanism entrains the combustion gas with a high oxygen concentration that flows into the combustion zone side of the flue (downstream side of the incineration zone). As a result of flowing toward the unburned gas having a low oxygen concentration which flows into the dry zone side (upstream side of the incineration treatment zone) of the flue, uniform diffusion of the combustion gas in the flue is promoted. At this time, the amount of oxygen required for secondary combustion has already been included in the combustion gas generated in the primary combustion region, and when normal air is supplied as secondary combustion gas in the secondary combustion region, However, there is a risk that the amount of nitrogen oxides generated will rise due to excess oxygen. Therefore, supplying high-temperature combustion exhaust gas from the combustion type superheater with a low oxygen concentration will generate nitrogen oxides due to excess oxygen supply. In addition to preventing the above, the combustion temperature in the secondary combustion region is maintained at a high temperature to promote the secondary combustion.
【００１２】一般に一酸化炭素の完全燃焼化のために
は、十分な酸素量、燃焼時間、燃焼温度が必要とされる
が、この中で酸素量に着目すると、焼却炉においては、
最終的に排ガス中の残留酸素濃度が約８％確保されてお
れば十分であることが知られている。そこで、ゴミ焼却
炉の排ガス中に含まれる酸素濃度を検出するガスセンサ
を設けて、二次燃焼ガス供給量調節機構により、前記ガ
スセンサによる検出酸素濃度が所定の目標値、例えば８
％に維持されるように、前記二次燃焼ガス供給機構から
の二次燃焼ガスの噴射量を調節することにより、二次燃
焼領域での燃焼条件を良好に保つのである。Generally, in order to completely burn carbon monoxide, a sufficient amount of oxygen, a burning time, and a burning temperature are required, and focusing attention on the amount of oxygen, in an incinerator,
It is known that it is sufficient if finally the residual oxygen concentration in the exhaust gas is secured at about 8%. Therefore, a gas sensor for detecting the oxygen concentration contained in the exhaust gas of the refuse incinerator is provided, and the oxygen concentration detected by the gas sensor is adjusted to a predetermined target value, for example, 8 by the secondary combustion gas supply amount adjusting mechanism.
By adjusting the injection amount of the secondary combustion gas from the secondary combustion gas supply mechanism so as to be maintained at%, the combustion condition in the secondary combustion region is kept good.
【００１３】さらに、燃焼温度に着目すると、二次燃焼
領域で一酸化炭素の完全燃焼化を促進するためには、該
領域を少なくとも一酸化炭素の燃焼温度である約６５０
℃よりも高温に維持する必要がある。そこで、ゴミ焼却
炉の排ガス温度を検出する温度センサを設けて、二次燃
焼ガス供給量調節機構により、前記温度センサによる検
出排ガス温度が所定の目標値、例えば８５０℃以上に維
持されるように、前記二次燃焼ガス供給機構からの二次
燃焼ガスの噴射量を調節することにより二次燃焼領域で
の燃焼条件を良好に保つのである。Further, paying attention to the combustion temperature, in order to promote the complete combustion of carbon monoxide in the secondary combustion region, the combustion temperature of at least carbon monoxide in the region is about 650.
It should be maintained above ℃. Therefore, a temperature sensor for detecting the exhaust gas temperature of the refuse incinerator is provided, and the exhaust gas temperature detected by the temperature sensor is maintained at a predetermined target value, for example, 850 ° C. or higher by the secondary combustion gas supply amount adjustment mechanism. By adjusting the injection amount of the secondary combustion gas from the secondary combustion gas supply mechanism, the combustion condition in the secondary combustion region is kept good.
【００１４】[0014]
【発明の効果】本発明によれば、二次燃焼領域におい
て、温度低下を引き起こすことのない状態で燃焼ガスを
均一拡散して、完全燃焼を促進しながら同時に窒素酸化
物の発生を低減させることが可能なゴミ焼却装置を提供
することができるようになった。EFFECTS OF THE INVENTION According to the present invention, in the secondary combustion region, the combustion gas is uniformly diffused in a state where the temperature does not drop, and the complete combustion is promoted while at the same time reducing the generation of nitrogen oxides. It is now possible to provide a garbage incinerator capable of
【００１５】[0015]
【実施例】以下に実施例を説明する。図１に示すよう
に、ゴミ焼却装置は、ゴミを焼却するストーカ式の焼却
処理帯３を備えた一次燃焼領域Ｒ１の上方空間に煙道４
を形成して二次燃焼領域Ｒ２とし、前記煙道４の下流側
に排ガスから熱回収する廃熱ボイラ７を備えたゴミ焼却
炉１と、前記廃熱ボイラ７からの発生蒸気を過熱する燃
焼式過熱器８と、前記燃焼式過熱器８による過熱蒸気で
発電する蒸気タービン９ａを備えた発電装置９とからな
る。EXAMPLES Examples will be described below. As shown in FIG. 1, the refuse incinerator has a flue 4 in a space above a primary combustion region R1 including a stoker type incineration zone 3 for incinerating refuse.
To form a secondary combustion region R2, and a waste incinerator 1 having a waste heat boiler 7 for recovering heat from exhaust gas downstream of the flue 4, and combustion for superheating steam generated from the waste heat boiler 7. The superheater 8 and a power generator 9 having a steam turbine 9a for generating electric power with superheated steam by the combustion type superheater 8.
【００１６】前記ゴミ焼却炉１について詳述すると、ホ
ッパ２に投入されたゴミが油圧駆動式のプッシャ２ａに
より炉内に投入され、前記焼却処理帯３で一次燃焼され
る。前記焼却処理帯３は、火格子３ａの往復運動により
ゴミを搬送処理するストーカ機構を備え、上流側から順
にゴミを乾燥処理する乾燥帯Ａと、乾燥されたゴミを燃
焼する燃焼帯Ｂと、燃焼したゴミを完全に灰化する後燃
焼帯Ｃを階段状に縦続設置して構成してあり、各処理帯
の下方に風箱６ｃ，６ｄ，６ｅを設けて、送風機６ａ、
送風路６ｂを介して一次燃焼用の空気を供給する一次燃
焼空気供給機構６を設けてある。前記煙道４は、前記乾
燥帯Ａから燃焼帯Ｂの上方空間に断面が方形に形成して
あり、乾燥帯Ａで生じる可燃性ガス（還元性ガス）と燃
焼帯Ｂで生じるＮＯｘを含む燃焼ガスを混合してＮＯｘ
を還元するとともに、一酸化炭素を完全燃焼させる二次
燃焼領域Ｒ２となる。Explaining the dust incinerator 1 in detail, the dust introduced into the hopper 2 is introduced into the oven by the hydraulically driven pusher 2a, and is primarily burned in the incineration treatment zone 3. The incineration processing zone 3 includes a stoker mechanism that conveys and treats dust by the reciprocating motion of the grate 3a, and a drying zone A for drying the dust in order from the upstream side, and a combustion zone B for burning the dried dust. After the burned dust is completely ashed, the combustion zone C is cascaded in a stepwise manner, and the wind boxes 6c, 6d, 6e are provided below each treatment zone, and the blower 6a,
A primary combustion air supply mechanism 6 for supplying air for primary combustion via the air passage 6b is provided. The flue 4 has a rectangular cross section in the space above the dry zone A to the combustion zone B, and combusts with a combustible gas (reducing gas) produced in the dry zone A and NOx produced in the combustion zone B. NOx mixed with gas
Becomes a secondary combustion region R2 in which carbon monoxide is completely combusted.
【００１７】廃熱ボイラ７で熱交換された排ガスは、バ
グフィルターや洗煙装置等の排ガス処理装置１０により
有害物質やばいじんが除去された後に煙突１１から排気
される。The exhaust gas heat-exchanged in the waste heat boiler 7 is exhausted from the chimney 11 after removing harmful substances and dust by the exhaust gas processing device 10 such as a bag filter and a smoke washing device.
【００１８】前記発電装置９は、蒸気タービン９ａとこ
れによって駆動される発電機９ｂとでなり、前記廃熱ボ
イラ７で発生した約３１０℃の蒸気を、蒸気供給路１２
を介して前記燃焼式過熱器８に供給し、過熱用バーナー
８ａによる燃焼熱で約５００℃に昇温した後に、蒸気供
給路１３を介して前記蒸気タービン９ａに供給する。つ
まり、前記焼却炉１での排ガスには塩化水素等の腐食性
ガスが発生するために、高温腐食防止の観点から約３１
０℃以上に過熱できないために、外部に過熱器を設けて
過熱し、発電効率を高めるものである。The power generator 9 comprises a steam turbine 9a and a power generator 9b driven by the steam turbine 9a. The steam at a temperature of about 310 ° C. generated in the waste heat boiler 7 is supplied to the steam supply line 12
Is supplied to the combustion type superheater 8 via the steam generator, heated to about 500 ° C. by the heat of combustion by the overheating burner 8a, and then supplied to the steam turbine 9a via the steam supply passage 13. That is, since corrosive gas such as hydrogen chloride is generated in the exhaust gas in the incinerator 1, about 31% from the viewpoint of high temperature corrosion prevention.
Since it cannot be overheated to 0 ° C. or more, an external superheater is provided to overheat, thereby improving power generation efficiency.
【００１９】前記過熱用バーナー８ａへの供給空気量を
必要空気量より増した状態で燃焼し、含有酸素濃度が約
３．５％、約４００℃の高温の燃焼排ガスを、二次燃焼
ガス供給路１４を介して前記二次燃焼領域Ｒ２に導くよ
うに構成してある。The combustion gas with the amount of air supplied to the superheating burner 8a being higher than the required amount of air is burned, and the high temperature combustion exhaust gas having an oxygen concentration of about 3.5% and about 400 ° C. is supplied to the secondary combustion gas. It is configured so as to be guided to the secondary combustion region R2 via the passage 14.
【００２０】詳述すると、前記煙道４の上流側で、且
つ、前記焼却処理帯３の下流側の壁面４ａに、前記焼却
処理帯３の下流側（燃焼帯Ｂ側）から上流側（乾燥帯Ａ
側）に向けて、さらに詳しくは、乾燥帯Ａと燃焼帯Ｂと
のなす段差部に向けて、二次燃焼ガスを噴射する複数の
ノズル１５ａでなる二次燃焼ガス供給機構１５を設け
て、前記二次燃焼ガス供給路１４を前記二次燃焼ガス供
給機構１５にダンパ機構１６ａを介して接続してある。More specifically, on the wall surface 4a on the upstream side of the flue 4 and on the downstream side of the incineration processing zone 3, from the downstream side (combustion zone B side) of the incineration processing zone 3 to the upstream side (drying). Obi A
Side), more specifically, the secondary combustion gas supply mechanism 15 including a plurality of nozzles 15a for injecting the secondary combustion gas is provided toward the step formed by the dry zone A and the combustion zone B, The secondary combustion gas supply passage 14 is connected to the secondary combustion gas supply mechanism 15 via a damper mechanism 16a.
【００２１】前記排ガス処理装置１０の下流側には、前
記ゴミ焼却炉１の排ガス中に含まれる酸素濃度を検出す
るガスセンサＳ１を設けて、前記ガスセンサＳ１による
検出酸素濃度が目標値である約８％以上に維持されるよ
うに、前記二次燃焼ガス供給機構１５からの二次燃焼ガ
スの噴射量を調節する二次燃焼ガス供給量調節機構１６
を設けてある。A gas sensor S1 for detecting the oxygen concentration contained in the exhaust gas of the refuse incinerator 1 is provided on the downstream side of the exhaust gas treatment apparatus 10, and the oxygen concentration detected by the gas sensor S1 is about 8 which is a target value. %, The secondary combustion gas supply amount adjusting mechanism 16 for adjusting the injection amount of the secondary combustion gas from the secondary combustion gas supplying mechanism 15
Is provided.
【００２２】即ち、前記二次燃焼ガス供給量調節機構１
６は、前記ダンパ機構１６ａと、前記ガスセンサＳ１か
らの信号を入力し、前記ダンパ機構１６ａの開度を調節
する制御装置１６ｂとで構成される。That is, the secondary combustion gas supply amount adjusting mechanism 1
Reference numeral 6 is composed of the damper mechanism 16a and a control device 16b which receives a signal from the gas sensor S1 and adjusts the opening degree of the damper mechanism 16a.
【００２３】以下に別実施例を説明する。図３に示すよ
うに、前記二次燃焼領域Ｒ２に、排ガス温度を検出する
温度センサＳ２を設けて前記温度センサＳ２による検出
排ガス温度が所定の目標値、例えば８００℃から９５０
℃に維持されるように、前記二次燃焼ガス供給機構１５
からの二次燃焼ガスの噴射量お調節する二次燃焼ガス供
給量調節機構１６を設けてもよい。即ち、前記二次燃焼
ガス供給量調節機構１６は前記ダンパ機構１６ａと、前
記温度センサＳ２からの信号を入力し、前記ダンパ機構
１６ａの開度を調節する制御装置１６ｃとで構成され、
検出排ガス温度が目標値より低い場合には前記ダンパ機
構１６ａの開度を小に調節して過剰供給による冷却で温
度が低下することを防止し、目標値より高い場合には、
前記ダンパ機構１６ａの開度を大に調節して二次燃焼を
促進するのである。尚、目標値は例示であり、この値に
限定するものではない。Another embodiment will be described below. As shown in FIG. 3, a temperature sensor S2 for detecting the exhaust gas temperature is provided in the secondary combustion region R2 so that the exhaust gas temperature detected by the temperature sensor S2 has a predetermined target value, for example, 800 ° C. to 950 ° C.
So that the secondary combustion gas supply mechanism 15 is maintained at
A secondary combustion gas supply amount adjusting mechanism 16 for adjusting the injection amount of the secondary combustion gas from the above may be provided. That is, the secondary combustion gas supply amount adjusting mechanism 16 includes the damper mechanism 16a and a control device 16c that receives a signal from the temperature sensor S2 and adjusts the opening degree of the damper mechanism 16a.
When the detected exhaust gas temperature is lower than the target value, the opening degree of the damper mechanism 16a is adjusted to a small value to prevent the temperature from being lowered by cooling due to excessive supply, and when the detected exhaust gas temperature is higher than the target value,
The opening degree of the damper mechanism 16a is adjusted to a large degree to promote secondary combustion. The target value is an example, and the value is not limited to this value.
【００２４】さらに、二次燃焼ガス供給量調節機構１６
としては、上述のガスセンサＳ１と温度センサＳ２を備
え、双方のセンサによる検出入力により前記ダンパ機構
１６ａの開度を調節するものであってもよい。Further, the secondary combustion gas supply amount adjusting mechanism 16
Alternatively, the gas sensor S1 and the temperature sensor S2 described above may be provided, and the opening degree of the damper mechanism 16a may be adjusted by the detection inputs of both sensors.
【００２５】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、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 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】本発明による都市ゴミ焼却装置の実施例を示す
説明図FIG. 1 is an explanatory view showing an embodiment of an incinerator of municipal waste according to the present invention.
【図２】実験結果の説明図FIG. 2 Explanatory diagram of experimental results
【図３】別実施例を示す都市ゴミ焼却装置の説明図FIG. 3 is an explanatory view of the municipal waste incinerator showing another embodiment.
【図４】従来例を示す都市ゴミ焼却装置の説明図FIG. 4 is an explanatory view of a conventional municipal waste incinerator showing an example.
１ 焼却炉 ３ 焼却処理帯 ４ 煙道 ７ 廃熱ボイラ ８ 燃焼式過熱器 ９ 発電装置 ９ａ 蒸気タービン １４ 二次燃焼ガス供給路 １５ 二次燃焼ガス供給機構 1 incinerator 3 incineration zone 4 flue 7 waste heat boiler 8 combustion type superheater 9 power generator 9a steam turbine 14 secondary combustion gas supply path 15 secondary combustion gas supply mechanism
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 Ｆ２３Ｇ 5/44 ＺＡＢ Ｆ 5/50 ＺＡＢ Ｈ Ｎ (72)発明者 黒石 智 兵庫県尼崎市浜１丁目１番１号 株式会社 クボタ技術開発研究所内Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical indication location F23G 5/44 ZAB F 5/50 ZAB H N (72) Inventor Satoshi Kuroishi 1-1-1 Hama, Amagasaki City, Hyogo Prefecture KUBOTA Technology Development Laboratory Co., Ltd.
Claims (3)
（３）を備えた一次燃焼領域の上方空間に煙道（４）を
形成して二次燃焼領域とし、前記煙道（４）の下流側に
排ガスから熱回収する廃熱ボイラ（７）を備えたゴミ焼
却炉（１）と、前記廃熱ボイラ（７）からの発生蒸気を
過熱する燃焼式過熱器（８）と、前記燃焼式過熱器
（８）による過熱蒸気で発電する蒸気タービン（９ａ）
を備えた発電装置（９）とからなり、 前記燃焼式過熱器（８）からの燃焼排ガスを、酸素濃度
を低くした状態で前記二次燃焼領域に導く二次燃焼ガス
供給路（１４）を設けてあるゴミ焼却装置であって、 前記煙道（４）の上流側で、且つ、前記焼却処理帯
（３）の下流側に、前記焼却処理帯（３）の下流側から
上流側に向けて二次燃焼ガスを噴射する二次燃焼ガス供
給機構（１５）を設けて、前記二次燃焼ガス供給路（１
４）を前記二次燃焼ガス供給機構（１５）に接続してあ
るゴミ焼却装置。1. A flue (4) is formed in a space above a primary combustion zone provided with a stoker-type incineration treatment zone (3) for incinerating dust to form a secondary combustion zone, and the flue (4) A waste incinerator (1) equipped with a waste heat boiler (7) for recovering heat from exhaust gas on the downstream side, a combustion type superheater (8) for superheating steam generated from the waste heat boiler (7), and the combustion Steam turbine (9a) that generates electric power with superheated steam by a superheater (8)
A secondary combustion gas supply path (14) for guiding the combustion exhaust gas from the combustion type superheater (8) to the secondary combustion region with a low oxygen concentration. A provided refuse incinerator, which is located upstream of the flue (4) and downstream of the incineration zone (3), from the downstream side to the upstream side of the incineration zone (3). A secondary combustion gas supply mechanism (15) for injecting secondary combustion gas is provided, and the secondary combustion gas supply path (1
4) A refuse incinerator in which 4) is connected to the secondary combustion gas supply mechanism (15).
れる酸素濃度を検出するガスセンサ（Ｓ１）を設けて、
前記ガスセンサ（Ｓ１）による検出酸素濃度が所定の目
標値に維持されるように、前記二次燃焼ガス供給機構
（１５）からの二次燃焼ガスの噴射量を調節する二次燃
焼ガス供給量調節機構（１６）を設けてある請求項１記
載のゴミ焼却装置。2. A gas sensor (S1) for detecting the concentration of oxygen contained in the exhaust gas of the refuse incinerator (1) is provided,
Secondary combustion gas supply amount adjustment for adjusting the injection amount of the secondary combustion gas from the secondary combustion gas supply mechanism (15) so that the oxygen concentration detected by the gas sensor (S1) is maintained at a predetermined target value. The refuse incinerator according to claim 1, further comprising a mechanism (16).
出する温度センサ（Ｓ２）を設けて、前記温度センサ
（Ｓ２）による検出排ガス温度が所定の目標値に維持さ
れるように、前記二次燃焼ガス供給機構（１５）からの
二次燃焼ガスの噴射量を調節する二次燃焼ガス供給量調
節機構（１６）を設けてある請求項１又は２記載のゴミ
焼却装置。3. A temperature sensor (S2) for detecting the exhaust gas temperature of the refuse incinerator (1) is provided, and the exhaust gas temperature detected by the temperature sensor (S2) is maintained at a predetermined target value. The waste incinerator according to claim 1 or 2, further comprising a secondary combustion gas supply amount adjusting mechanism (16) for adjusting an injection amount of the secondary combustion gas from the secondary combustion gas supplying mechanism (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6257893A JP2733201B2 (en) | 1994-10-24 | 1994-10-24 | Garbage incineration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6257893A JP2733201B2 (en) | 1994-10-24 | 1994-10-24 | Garbage incineration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08121724A true JPH08121724A (en) | 1996-05-17 |
| JP2733201B2 JP2733201B2 (en) | 1998-03-30 |
Family
ID=17312657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6257893A Expired - Lifetime JP2733201B2 (en) | 1994-10-24 | 1994-10-24 | Garbage incineration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2733201B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2151793A1 (en) * | 1997-11-12 | 2001-01-01 | Holter Heinz Professor Dr Sc D | Procedure for burning fossil fuels and waste |
| JP2016121820A (en) * | 2014-12-24 | 2016-07-07 | 川崎重工業株式会社 | Incineration plant |
-
1994
- 1994-10-24 JP JP6257893A patent/JP2733201B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2151793A1 (en) * | 1997-11-12 | 2001-01-01 | Holter Heinz Professor Dr Sc D | Procedure for burning fossil fuels and waste |
| JP2016121820A (en) * | 2014-12-24 | 2016-07-07 | 川崎重工業株式会社 | Incineration plant |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2733201B2 (en) | 1998-03-30 |
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