JP2003161414A - Stoker type waste gasification incineration equipment and incineration method - Google Patents

Stoker type waste gasification incineration equipment and incineration method

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Publication number
JP2003161414A
JP2003161414A JP2001361250A JP2001361250A JP2003161414A JP 2003161414 A JP2003161414 A JP 2003161414A JP 2001361250 A JP2001361250 A JP 2001361250A JP 2001361250 A JP2001361250 A JP 2001361250A JP 2003161414 A JP2003161414 A JP 2003161414A
Authority
JP
Japan
Prior art keywords
stoker
furnace
solid component
component
type waste
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.)
Withdrawn
Application number
JP2001361250A
Other languages
Japanese (ja)
Inventor
Tadayuki Motai
匡之 馬渡
Kimitoshi Ose
公利 小瀬
Yonosuke Hoshi
要之介 星
Hiroki Honda
裕姫 本多
Junji Sugai
淳史 菅井
Original Assignee
Mitsubishi Heavy Ind Ltd
三菱重工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Ind Ltd, 三菱重工業株式会社 filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP2001361250A priority Critical patent/JP2003161414A/en
Publication of JP2003161414A publication Critical patent/JP2003161414A/en
Withdrawn legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide waste incineration equipment and a method for restraining a toxic substance discharged outside a system on the downstream side by proper treatment of the separated unburnt content such as capturing and separating the solid unburnt content including dioxin and the like or its precursor in pyrolytic gas, in the stoker type waste incineration equipment and the method. <P>SOLUTION: This stoker type waste gasification incineration equipment is characterized by having a stoker furnace for burning waste under insufficiency of oxygen together with primary air by supplying the waste on a fire grate, a secondary combustion furnace for burning a substantial combustible gas component in the pyrolytic gas generated from the stoker furnace together with secondary air, and a solid component separating means for separating a solid component accompanied by the pyrolytic gas generated from the stoker furnace between the stoker furnace and the secondary combustion furnace. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【発明の属する技術の分野】本発明は、熱分解ガス中の
ダイオキシン類もしくはその前駆体を含む固体未燃分な
どを補足分離し、前記分離した固体未燃分の適切な処理
により、下流側で系外に排出する前記有害物を抑制する
ストーカ式廃棄物ガス化焼却装置及び焼却方法に関す
る。
TECHNICAL FIELD The present invention relates to a method in which a solid unburned component containing dioxins or a precursor thereof in a pyrolysis gas is supplemented and separated, and the separated solid unburned component is appropriately treated to obtain a downstream side. The present invention relates to a stoker-type waste gasification incinerator and an incineration method for suppressing the harmful substances discharged to the outside of the system.
【0002】[0002]
【従来の技術】ストーカ式廃棄物焼却炉では、図2に示
すように、ホッパ9へ廃棄物1を投入し、プッシャ10
により供給量を加減しつつ、火格子7上に供給し、一次
空気2と共に燃焼し、熱分解ガスを発生する。1次燃焼
域11で燃焼しきれない熱分解ガスは二次空気3と共に
2次燃焼域12で完全に燃焼される。燃焼残渣(灰)は
受槽6に落下し、灰溶融炉13などで無害化される。
2. Description of the Related Art In a stoker-type waste incinerator, as shown in FIG. 2, a waste 1 is put into a hopper 9 and a pusher 10 is inserted.
The amount of supply is adjusted by the above, and is supplied onto the grate 7 and burned together with the primary air 2 to generate a pyrolysis gas. The pyrolysis gas that cannot be completely burned in the primary combustion zone 11 is completely burned in the secondary combustion zone 12 together with the secondary air 3. The combustion residue (ash) falls into the receiving tank 6 and is rendered harmless in the ash melting furnace 13 or the like.
【0003】この際、供給空気中不活性ガス(N2)、
燃焼ガス(CO、CO2)や分解ガス(炭化水素類、炭
化水素類部分酸化物、塩素含有低分子化合物、etc)
などの発生ガス(気体成分)の気流に同伴されて焼却灰
や未燃分固体粒子(固体成分)がフリーボード部8へ巻
き上げられ、炉からのガス側排出物は気体成分4と固体
成分5の混合物となっている。
At this time, inert gas (N2) in the supply air,
Combustion gas (CO, CO2) and decomposition gas (hydrocarbons, partial oxides of hydrocarbons, low molecular compounds containing chlorine, etc)
Incinerator ash and unburned solid particles (solid component) are entrained in the air flow of the generated gas (gas component) such as, and are wound up on the freeboard section 8, and the gas side emission from the furnace is the gas component 4 and the solid component 5 It is a mixture of.
【0004】固体成分5中の未燃分固体粒子は気体成分
中の分解ガスにくらべて反応速度は遅く、炉内で完全燃
焼せず、これら未燃分の一部がダイオキシン類やその前
駆体となる。また、焼却灰は重金属類を含んでいるので
ダイオキシン類の合成触媒として働き、ダイオキシン類
を再合成させる。また、排気ガスラインに何らかの固体
成分(粒子)補足手段がないと、固体成分はそのまま系
外に排出される。さらに該固体成分は、例え補足したと
しても、前記したように、ダイオキシン類若しくはその
前駆体の濃度が高く、重金属類の溶出度が高い。
The unburned solid particles in the solid component 5 have a slower reaction rate than the decomposed gas in the gas component and do not completely burn in the furnace. Some of these unburned components are dioxins and their precursors. Becomes Further, since the incineration ash contains heavy metals, it acts as a synthesis catalyst for dioxins and re-synthesizes dioxins. Further, if there is no solid component (particle) supplementing means in the exhaust gas line, the solid component will be discharged out of the system as it is. Further, even if supplemented, the solid component has a high concentration of dioxins or their precursors and a high elution rate of heavy metals, as described above.
【0005】[0005]
【発明が解決しようとする課題】本発明はかかる従来の
問題点に鑑みてなされたもので、ストーカ式廃棄物焼却
装置および方法において、熱分解ガス中のダイオキシン
類もしくはその前駆体を含む固体未燃分などを補足分離
し、前記分離した固体未燃分の適切な処理により、下流
側で系外に排出する前記有害物を抑制する廃棄物の焼却
装置および方法の提供を目的とする。
SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and in a stoker-type waste incinerator and method, a solid substance containing dioxins or a precursor thereof in a pyrolysis gas is not formed. It is an object of the present invention to provide a waste incineration device and method for supplementally separating fuel and the like and suppressing the harmful substances discharged to the outside of the system by appropriate treatment of the separated solid unburned component.
【0006】[0006]
【課題を解決するための手段】本発明のストーカ式廃棄
物ガス化焼却装置は、火格子上に廃棄物を供給して、一
次空気と共に酸素不足下に燃焼させる一次燃焼室を有す
るストーカ炉と該ストーカ炉から発生する熱分解ガス中
の実質的可燃性気体成分を二次空気と共に燃焼させる二
次燃焼炉とを分離して設け、前記ストーカ炉と二次燃焼
炉との間に、ストーカ炉から発生する熱分解ガスに同伴
する固体成分を分離する固体成分分離手段とを備えてい
る。
A stoker-type waste gasification incinerator according to the present invention is a stoker furnace having a primary combustion chamber for supplying waste on a grate and burning it together with primary air in a lack of oxygen. A secondary combustion furnace that burns substantially combustible gas components in the pyrolysis gas generated from the stoker furnace with secondary air is provided separately, and a stoker furnace is provided between the stoker furnace and the secondary combustion furnace. And a solid component separation means for separating solid components that accompany the pyrolysis gas generated from the gas.
【0007】前記固体成分分離手段は、例えば、ストー
カ炉のフリーボード上部ガス側排出口と管路などでその
入口に接続したサイクロン、サイクロンの固体成分出口
を管路などで固体成分受槽の入口に接続し、サイクロン
の気体成分出口を管路などで二次燃焼炉原料供給口に接
続して構成する。サイクロンに替えて、発生する熱分解
ガスの高温に十分耐えられる材質・構造であり、閉塞な
どの懸念がなければ、分離手段に使用することができる
ので、サイクロンに限定する必要はない。
The solid component separating means may be, for example, a cyclone connected to the freeboard upper gas side discharge port of a stoker furnace and its inlet through a pipe or the like, and a solid component outlet of the cyclone may be connected through a pipe or the like to the inlet of the solid component receiving tank. The cyclone gas component outlet is connected to the secondary combustion furnace raw material supply port by a pipe or the like. In place of the cyclone, the material / structure can sufficiently withstand the high temperature of the generated pyrolysis gas, and it can be used as the separating means if there is no concern about clogging, so it is not necessary to limit to the cyclone.
【0008】二次燃焼炉は前記熱分解ガスから固体成分
を除去した気体成分を供給する供給口、二次空気を供給
する二次空気供給口、該気体成分が二次空気とともに燃
焼して排出する、高温の排ガスの排出口を少なくとも備
えた炉体であって、気体成分供給口は前記サイクロン気
体成分出口に、排ガス排出口は排ガス処理設備など次段
の工程へ、二次空気供給口は二次空気供給源にそれぞれ
接続されている。炉体の形体は、例えば反応塔状の円筒
炉でよいが、特に制限されない。また、本二次燃焼炉は
熱分解ガスを改質する改質炉として使用しても良い。
The secondary combustion furnace has a supply port for supplying a gas component obtained by removing a solid component from the pyrolysis gas, a secondary air supply port for supplying secondary air, and the gas component is burned and discharged together with the secondary air. , A furnace body having at least a high-temperature exhaust gas discharge port, the gas component supply port to the cyclone gas component outlet, the exhaust gas discharge port to the next step such as exhaust gas treatment equipment, the secondary air supply port Each is connected to a secondary air supply source. The shape of the furnace body may be, for example, a reaction tower-shaped cylindrical furnace, but is not particularly limited. Further, the secondary combustion furnace may be used as a reforming furnace for reforming the pyrolysis gas.
【0009】なお、ストーカ炉のフリーボードは、本発
明の思想において、積極的に燃焼させる必要のないこと
から、フリーボード部の高さは通常のストーカ炉より低
いものであってもよい。
Since the freeboard of the stoker furnace does not need to be actively burned in the concept of the present invention, the height of the freeboard portion may be lower than that of a normal stoker furnace.
【0010】本発明のストーカ式廃棄物ガス化焼却装置
は、更に前記固体成分分離手段により分離した固体成分
を、受け入れて無害化処理する溶融炉もしくは焙焼炉を
備えたことを特徴とする。
The stoker-type waste gasification and incinerator of the present invention is characterized by further comprising a melting furnace or a roasting furnace for receiving and detoxifying the solid components separated by the solid component separating means.
【0011】前記溶融炉は未燃固体成分を分解揮発させ
灰分とし、固体成分中の灰分とともに溶融粒状化もしく
は溶融塊状化する機能が必要である。そして、未燃固体
成分を分解揮発したり灰分を溶融するための熱源を備え
ていることが必要である。
The melting furnace is required to have a function of decomposing and evaporating unburned solid components into ash, and melting and granulating with the ash in the solid components. Further, it is necessary to provide a heat source for decomposing and volatilizing unburned solid components and melting ash.
【0012】また、焙焼炉は溶融炉のように溶融までに
至らせる必要はないが、未燃固体成分を分解揮発させ灰
分とし、固体成分中の灰分中に含まれる有害有機物質な
どを揮発させる機能が必要である。そして、未燃固体成
分を分解揮発させたり、有害物を揮発させるための熱源
を備えていることが必要である。そして、前記固体成分
分離手段から固体成分を受け入れるため、固体成分受槽
と接続された受け入れ口を少なくとも備えている。
Unlike a melting furnace, it is not necessary for the roasting furnace to reach melting, but unburned solid components are decomposed and volatilized to form ash, and harmful organic substances contained in the ash contained in the solid components are volatilized. It is necessary to have a function. Further, it is necessary to provide a heat source for decomposing and volatilizing unburned solid components and volatilizing harmful substances. Further, at least a receiving port connected to the solid component receiving tank is provided for receiving the solid component from the solid component separating means.
【0013】更に本発明のストーカ式廃棄物ガス化焼却
装置は、前記固体成分分離手段により分離した固体成分
を、該分離手段固体成分受器からストーカ炉の一次燃焼
室に戻し、固体成分の灼熱減量の低減をはかるための戻
入手段を備えたことを特徴とする。
Further, in the stoker type waste gasification and incinerator of the present invention, the solid component separated by the solid component separating means is returned from the solid means receiver of the separating means to the primary combustion chamber of the stoker furnace to burn the solid component. It is characterized in that a return means is provided for reducing the weight reduction.
【0014】前記戻入手段は前記固体成分受槽よりスト
ーカ炉内に固体成分を移送するように、一方をストーカ
炉の一次燃焼室へ、他方を該固体成分受槽に接続した管
路その他の移送手段によって構成する。
In order to transfer the solid component from the solid component receiving tank into the stoker furnace, the return means is connected to the primary combustion chamber of the stoker furnace by one side and the other by means of a pipe line or other transfer means connected to the solid component receiving tank. Constitute.
【0015】更に本発明のストーカ式廃棄物ガス化焼却
装置は、前記ストーカ炉から発生する熱分解ガスから固
体成分を分離した実質的可燃性気体成分を二次空気と共
に燃焼させる二次燃焼炉に酸素富化手段を備え、高温完
全燃焼可能としたことを特徴とする。
Further, the stoker-type waste gasification and incinerator of the present invention is a secondary combustion furnace for burning a substantially combustible gas component obtained by separating a solid component from the pyrolysis gas generated from the stoker furnace together with secondary air. It is characterized in that it is equipped with oxygen enrichment means and is capable of high temperature complete combustion.
【0016】前記酸素富化手段は空気分離器、酸素ボン
ベなどのような酸素供給源に接続された供給配管と、該
供給配管をそれに接続することにより二次空気供給路に
該酸素を混合可能な分岐接続端によって構成することが
できる。前記酸素供給管路には適宜流量調節する手段を
設けて酸素富化率を調製する。
The oxygen enriching means is capable of mixing the supply pipe connected to an oxygen supply source such as an air separator or an oxygen cylinder, and the oxygen in the secondary air supply passage by connecting the supply pipe to the supply pipe. It can be configured by a simple branch connection end. The oxygen supply line is provided with means for adjusting the flow rate appropriately to adjust the oxygen enrichment rate.
【0017】更に本発明のストーカ式廃棄物ガス化焼却
装置は、ストーカ炉の火格子の下流段域に酸素および/
もしくは水蒸気を供給する手段を備え、前記戻入した固
体成分のチャー分のガス化を促し、熱灼減量の低減を可
能としたことを特徴とする。
Further, the stoker-type waste gasification and incinerator of the present invention has oxygen and / or oxygen in the downstream stage area of the grate of the stoker furnace.
Alternatively, it is characterized in that it is provided with a means for supplying water vapor to promote gasification of the char component of the returned solid component, thereby making it possible to reduce the amount of heat ablation.
【0018】前記酸素および/もしくは水蒸気を供給す
る手段は酸素発生手段もしくは水蒸気発生手段とストー
カ炉の火格子の下流段域に供給するよう接続した配管に
より構成することができる。
The means for supplying the oxygen and / or steam may be constituted by oxygen generating means or steam generating means and a pipe connected so as to supply the oxygen and / or steam generating means to the downstream region of the grate of the stoker furnace.
【0019】そして、本発明のストーカ式廃棄物ガス化
焼却方法は、ストーカ炉の火格子上に廃棄物を供給し
て、一次空気と共に酸素不足下に燃焼させることにより
発生する熱分解ガスから、固体成分を分離した後の実質
的可燃性気体成分を二次空気と共に燃焼させることを特
徴とする。
The stoker-type waste gasification and incineration method according to the present invention uses a pyrolysis gas generated by supplying waste onto the grate of a stoker furnace and burning it together with primary air under oxygen deficiency, It is characterized in that the substantially combustible gas component after separating the solid component is combusted with secondary air.
【0020】これにより、ダイオキシン類もしくはその
前駆体を含有し、かつダイオキシン類再合成の触媒作用
をする重金属類が濃縮されている固体成分を、燃焼系か
ら除外し、下流側で系外に排出されるダイオキシン類を
抑制する。
As a result, solid components containing dioxins or their precursors and enriched with heavy metals that act as a catalyst for the resynthesis of dioxins are excluded from the combustion system and discharged outside the system on the downstream side. It suppresses dioxins that are generated.
【0021】更に、本発明のストーカ式廃棄物ガス化焼
却方法は、前記分離した固体成分を、溶融もしくは焙焼
して無害化処理することを特徴とする。
Further, the stoker-type waste gasification and incineration method of the present invention is characterized in that the separated solid component is subjected to detoxification treatment by melting or roasting.
【0022】これにより、分離除外した固体成分はその
ままでは、有害物であるため、これが含有しているダイ
オキシン類もしくはその前駆体を未だ含有している可燃
成分とともに揮発させて、好ましくは分解して除去し、
および/もしくは固体成分を溶融して、重金属類を塊状
もしくは粒状溶融物中に封鎖してその溶出重金属類を低
減させる。なお、ここで発生するダイオキシン類もしく
はその前駆体と可燃成分を含んだガスは高温の二次燃焼
炉中に供給して、燃焼させるとともに、ダイオキシン類
もしくはその前駆体を分解することが好ましい。
As a result, since the solid component separated and removed is a harmful substance as it is, the dioxin or its precursor contained therein is volatilized together with the combustible component still contained, and preferably decomposed. Removed,
And / or the solid components are melted and the heavy metals are sequestered in a bulk or granular melt to reduce the eluted heavy metals. It is preferable that the gas containing the dioxin or the precursor thereof and the combustible component generated here is supplied to a high temperature secondary combustion furnace to be burned and the dioxin or the precursor thereof is decomposed.
【0023】更に、本発明のストーカ式廃棄物ガス化焼
却方法は、前記分離した固体成分を、ストーカ炉に戻入
し、固体成分の灼熱減量の低減をはかることを特徴とす
る。
Furthermore, the stoker-type waste gasification and incineration method of the present invention is characterized in that the separated solid component is returned to the stoker furnace to reduce the ignition loss of the solid component.
【0024】この戻入方法は単独で固体成分の処理とす
ることも、前記固体成分の別途処理と併用することも可
能である。
This return method can be applied to the treatment of the solid component alone, or can be used in combination with the separate treatment of the solid component.
【0025】更に、本発明のストーカ式廃棄物ガス化焼
却方法は、前記一次空気の空気比を1以下とすることに
より酸素不足下に燃焼させて熱分解ガスを発生させると
ともに、固体成分の同伴を抑制し、該発生熱分解ガスか
ら固体成分を分離した実質的可燃性気体成分を酸素富化
した二次空気と共に燃焼させて、高温完全燃焼すること
を特徴とする。
Further, in the stoker-type waste gasification and incineration method of the present invention, when the air ratio of the primary air is set to 1 or less, combustion is performed under oxygen deficiency to generate a pyrolysis gas, and at the same time entrainment of solid components Is suppressed, and the substantially combustible gas component obtained by separating the solid component from the generated pyrolysis gas is combusted with secondary air enriched with oxygen to complete high temperature combustion.
【0026】これにより、ストーカ炉側からの気体成分
に含まれるダイオキシン類もしくはその前駆体も、固体
成分から揮発したダイオキシン類もしくはその前駆体も
ともに分解して無害化される。
As a result, both the dioxins or their precursors contained in the gas component from the stoker furnace side and the dioxins or their precursors volatilized from the solid component are decomposed and rendered harmless.
【0027】更に、本発明のストーカ式廃棄物ガス化焼
却方法は、ストーカ炉の火格子の下流S段域に酸素およ
び/もしくは水蒸気を供給し、前記戻入した固体成分の
チャー分のガス化を促し、熱灼減量を低減することを特
徴とする。
Further, in the stoker-type waste gasification and incineration method of the present invention, oxygen and / or steam are supplied to the downstream S stage region of the grate of the stoker furnace to gasify the char component of the returned solid component. It is characterized by urging and reducing the ablation loss.
【0028】前記ガス化とは、酸素によって酸化されて
炭酸ガスとなる反応の他に、炭素分が水蒸気と反応す
る、いわゆる水性ガス化反応でCO+H2を発生する反
応も含む。
The gasification includes not only the reaction of being oxidized by oxygen to carbon dioxide gas, but also the reaction of carbon content with water vapor, that is, the reaction of generating CO + H 2 by a so-called water gasification reaction.
【0029】[0029]
【発明の実施の形態】以下に本発明の実施の形態につい
て図面を参照して詳しく説明する。但し本実施の形態に
記載される製品の寸法、形状、材質、その相対配置等は
特に特定的な記載が無い限りは本発明の範囲をそれのみ
に限定する趣旨ではなく、単なる説明例に過ぎない。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. However, the dimensions, shapes, materials, relative positions, etc. of the products described in the present embodiment are not intended to limit the scope of the present invention thereto unless specified otherwise, and are merely illustrative examples. Absent.
【0030】図1は本発明のストーカ式廃棄物ガス化焼
却装置の一例のフロー図である。図において、ストーカ
炉14は火格子7、廃棄物投入ホッパ9、プッシャ10
を備え、火格子下面の風箱より、各燃焼域に一次空気2
が送入可能となっている。更に、ストーカ炉後端の灰排
出口には灰受槽6が接続されており、焼却後の灰が落下
蓄積する。本ストーカ式廃棄物ガス化焼却装置には、固
体成分分離手段として、サイクロン16を備え、その入
り口とストーカ炉14の一次燃焼室頂部とが接続されて
いる。更に灰の受槽6は次段の焙焼炉17に接続されて
いる。
FIG. 1 is a flow chart of an example of the stoker type waste gasification and incineration apparatus of the present invention. In the figure, a stoker furnace 14 includes a grate 7, a waste input hopper 9, and a pusher 10.
Equipped with the primary air 2 in each combustion area from the wind box under the grate.
Can be sent. Furthermore, an ash receiving tank 6 is connected to the ash discharge port at the rear end of the stoker furnace, and the ash after incineration falls and accumulates. The stoker-type waste gasification and incinerator is provided with a cyclone 16 as a solid component separating means, and its inlet is connected to the top of the primary combustion chamber of the stoker furnace 14. Further, the ash receiving tank 6 is connected to the roasting furnace 17 in the next stage.
【0031】本例では、廃棄物1をホッパから投入し、
プッシャ10で調節しながら、火格子7上に供給し、一
次空気を酸素不足になるように、送入して燃焼させ、熱
分解ガスを発生させる。該熱分解ガス101は実質的可
燃性気体成分に未燃廃棄物、飛灰などの固体成分を同伴
している。
In this example, the waste 1 is charged from the hopper,
While being adjusted by the pusher 10, the gas is supplied onto the grate 7 and the primary air is fed and burned so as to be oxygen-deficient to generate a pyrolysis gas. The pyrolysis gas 101 is a substantially combustible gas component accompanied by solid components such as unburned waste and fly ash.
【0032】ストーカ炉14のおき燃焼域20には水蒸
気と酸素19を送入し、灰に残存する炭素分を分解し、
灰の改質をはかる。排出する灰106は受槽6で一旦受
けた後焙焼炉17に移送する。
Steam and oxygen 19 are fed into the alternate combustion zone 20 of the stoker furnace 14 to decompose the carbon content remaining in the ash,
Measure the ash. The discharged ash 106 is once received in the receiving tank 6 and then transferred to the roasting furnace 17.
【0033】本ストーカ式廃棄物ガス化焼却装置は更に
塔型の二次燃焼炉15とスクリュー型の攪拌機を有する
焙焼炉17と、固体成分受器を備えている。焙焼炉17
には不図示の熱源を具えている。サイクロン16の気体
成分出口は前記二次燃焼炉15に接続され、サイクロン
16の固体成分出口は固体成分受器102に接続されて
いる。固体成分受器102の一方の出口はストーカ炉の
一次燃焼室21に接続され、もう一方の出口は焙焼炉1
7に接続されている。
The stoker type waste gasification incinerator further comprises a tower type secondary combustion furnace 15, a roasting furnace 17 having a screw type agitator, and a solid component receiver. Roasting furnace 17
Has a heat source (not shown). The gas component outlet of the cyclone 16 is connected to the secondary combustion furnace 15, and the solid component outlet of the cyclone 16 is connected to the solid component receiver 102. One outlet of the solid component receiver 102 is connected to the primary combustion chamber 21 of the stoker furnace, and the other outlet is of the roasting furnace 1
Connected to 7.
【0034】二次燃焼炉15は、二次空気もしくは酸素
富化二次空気105を導入する二次空気供給口を有し、
二次空気源及び酸素源に接続されている。焙焼炉17の
排出ガス出口は、二次燃焼炉15に接続されている。更
に二次燃焼炉15は排出ガス排出口を有し、次段の排ガ
ス処理設備18に接続されている。
The secondary combustion furnace 15 has a secondary air supply port for introducing secondary air or oxygen-enriched secondary air 105,
It is connected to a secondary air source and an oxygen source. The exhaust gas outlet of the roasting furnace 17 is connected to the secondary combustion furnace 15. Further, the secondary combustion furnace 15 has an exhaust gas outlet and is connected to the exhaust gas treatment facility 18 in the next stage.
【0035】ストーカ炉14で発生した熱分解ガス10
1はサイクロン16で固体成分5と気体成分4に分離
し、気体成分4は二次燃焼炉15へ導入され、固体成分
5は固体成分受器102で一旦受けとられる。固体成分
の一部は固体成分受器102から、戻入手段である管路
によって、ストーカ炉の一次燃焼室21へ戻入される。
更に固体成分5の一部は焙焼炉17へ移送する。
Pyrolysis gas 10 generated in the stoker furnace 14
Cyclone 16 separates solid component 5 and gas component 4, gas component 4 is introduced into secondary combustion furnace 15, and solid component 5 is once received by solid component receiver 102. A part of the solid component is returned from the solid component receiver 102 to the primary combustion chamber 21 of the stoker furnace by a pipe line which is a return means.
Further, a part of the solid component 5 is transferred to the roasting furnace 17.
【0036】二次燃焼炉15へ導入した気体成分47は
酸素富化空気105とともに高温燃焼し、可燃分は完全
に燃焼させ、残存するダイオキシンもしくはダイオキシ
ン前駆体は該高温条件下で分解させる。燃焼後の焙焼排
ガス103は管路により排ガス処理設備18へ導く。
The gas component 47 introduced into the secondary combustion furnace 15 burns at a high temperature together with the oxygen-enriched air 105, the combustible components are completely burned, and the remaining dioxin or dioxin precursor is decomposed under the high temperature conditions. The roasting exhaust gas 103 after combustion is led to the exhaust gas treatment facility 18 through a pipe line.
【0037】ストーカ炉14の一次燃焼室に戻入した固
体成分は再び、ストーカ炉14の温度条件下に曝されな
がら、最終的に火格子7上のおき燃焼段21で酸素富化
空気と水蒸気105により燃焼と水性ガス化して、無機
質化する。
The solid components returned to the primary combustion chamber of the stoker furnace 14 are again exposed to the temperature conditions of the stoker furnace 14, and finally, the oxygen-enriched air and the steam 105 in the alternate combustion stage 21 on the grate 7. Is combusted and converted into water gas to become inorganic.
【0038】焙焼炉17へ受け入れた固体成分5は、不
図示の熱源で加熱攪拌し、固体成分5が包含している残
存ダイオキシン類もしくはダイオキシン類前駆体を含む
揮発分を揮発させ、灰の改質を行う。揮発したガス10
4は二次燃焼炉15へ導かれ高温条件下で燃焼分解す
る。
The solid component 5 received in the roasting furnace 17 is heated and stirred by a heat source (not shown) to volatilize the volatile components including the residual dioxins or the dioxin precursor contained in the solid component 5 to form ash. Perform modification. Volatilized gas 10
4 is guided to the secondary combustion furnace 15 and decomposed by combustion under high temperature conditions.
【0039】[0039]
【発明の効果】以上説明したように、本発明によりスト
ーカ式廃棄物焼却装置および方法において、熱分解ガス
中のダイオキシン類もしくはその前駆体を多量に含む固
体未燃分などを補足分離すること、前記分離した固体未
燃分の適切な処理により、下流側で系外に排出する前記
有害物を抑制する廃棄物の焼却装置および方法の提供を
可能とした。
As described above, in the stoker-type waste incinerator and method according to the present invention, supplementary separation of solid unburned components containing a large amount of dioxins or their precursors in pyrolysis gas, By appropriately treating the separated solid unburned component, it is possible to provide a waste incineration device and method for suppressing the harmful substances discharged outside the system on the downstream side.
【図面の簡単な説明】[Brief description of drawings]
【図1】 本発明のストーカ式廃棄物ガス化焼却装置の
一例のフロー図
FIG. 1 is a flow chart of an example of a stoker-type waste gasification and incinerator of the present invention.
【図2】 従来のストーカ式廃棄物焼却炉の概念図[Figure 2] Conceptual diagram of a conventional stoker-type waste incinerator
【符号の説明】[Explanation of symbols]
1 廃棄物 2 一次空気 3 二次空気 4 気体成分 5 固体成分 6 受槽 7 火格子 8 フリーボード部 9 ホッパ 10 プッシャ 11 1次燃焼域 12 2次燃焼域 13 灰溶融炉 14 ストーカ炉 15 二次燃焼炉 16 サイクロン 17 焙焼炉 18 排ガス処理設備 19 酸素および/もしくは水蒸気 20 おき燃焼域 21 ストーカ炉の一次燃焼室 101 熱分解ガス 102 固体成分受器 103 焙焼排ガス 104 ガス 105 二次空気もしくは酸素富化二次空気 106 灰 1 waste 2 primary air 3 Secondary air 4 gas components 5 solid components 6 receiving tank 7 grate 8 Free board section 9 hoppers 10 pushers 11 Primary combustion zone 12 Secondary combustion zone 13 Ash melting furnace 14 stoker furnace 15 Secondary combustion furnace 16 cyclone 17 Roasting furnace 18 Exhaust gas treatment equipment 19 Oxygen and / or water vapor Burning area every 20 21 Primary combustion chamber of stoker furnace 101 pyrolysis gas 102 Solid component receiver 103 Roasting exhaust gas 104 gas 105 Secondary air or oxygen-enriched secondary air 106 ash
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) F23J 15/00 F23J 15/00 Z (72)発明者 星 要之介 横浜市金沢区幸浦一丁目8番地1 三菱重 工業株式会社横浜研究所内 (72)発明者 本多 裕姫 横浜市金沢区幸浦一丁目8番地1 三菱重 工業株式会社横浜研究所内 (72)発明者 菅井 淳史 横浜市金沢区幸浦一丁目8番地1 三菱重 工業株式会社横浜研究所内 Fターム(参考) 3K061 AA02 AB02 AB03 BA04 DA15 DA17 DB04 DB17 FA02 FA11 FA21 FA25 FA26 GA04 HA03 HA17 HA21 HA23 3K070 DA05 DA06 DA29 DA52 3K078 AA04 BA03 CA02 CA11 CA25 4D004 AA46 AB07 AC05 CA22 CA27 CA29 CB04 CB05 CB34 CC02 DA03 DA20 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI theme code (reference) F23J 15/00 F23J 15/00 Z (72) Inventor Yonosuke Hoshi 1-8, Yukiura, Kanazawa-ku, Yokohama-shi 1 Mitsubishi Heavy Industries, Ltd. Yokohama Research Laboratory (72) Inventor Yuuki Honda 1-8-chome, Koura, Kanazawa-ku, Yokohama City 1 Mitsubishi Heavy Industries Ltd. Yokohama Research Laboratory (72) Inventor Atsushi Sugai, 1-chome, Sachiura, Kanazawa-ku, Yokohama Address 8 Mitsubishi Heavy Industries, Ltd. Yokohama Research Laboratory F-term (reference) 3K061 AA02 AB02 AB03 BA04 DA15 DA17 DB04 DB17 FA02 FA11 FA21 FA25 FA26 GA04 HA03 HA17 HA21 HA23 3K070 DA05 DA06 DA29 DA52 3K078 AA04 BA03 CA02 CA11 CA25 4D004 AA46 AB07 AC05 CA22 CA27 CA29 CB04 CB05 CB34 CC02 DA03 DA20

Claims (10)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 火格子上に廃棄物を供給して、一次空気
    と共に酸素不足下に燃焼させる一次燃焼室を有するスト
    ーカ炉と該ストーカ炉から発生する熱分解ガス中の実質
    的可燃性気体成分を二次空気と共に燃焼させる二次燃焼
    炉とを分離して設け、前記ストーカ炉と二次燃焼炉との
    間に、ストーカ炉から発生する熱分解ガスに同伴する固
    体成分を分離する固体成分分離手段とを備えてなるスト
    ーカ式廃棄物ガス化焼却装置。
    1. A stoker furnace having a primary combustion chamber in which waste is supplied on a grate and burned together with primary air under oxygen deficiency, and a substantially combustible gas component in a pyrolysis gas generated from the stoker furnace. Is provided separately from a secondary combustion furnace that burns with secondary air, and a solid component separation that separates solid components that accompany the pyrolysis gas generated from the stoker furnace between the stoker furnace and the secondary combustion furnace. And a stoker-type waste gasification and incineration device.
  2. 【請求項2】 前記固体成分分離手段により分離した固
    体成分を、受け入れて無害化処理する溶融炉もしくは焙
    焼炉を備えたことを特徴とする請求項1記載のストーカ
    式廃棄物ガス化焼却装置。
    2. The stoker-type waste gasification and incinerator according to claim 1, further comprising a melting furnace or a roasting furnace for receiving and detoxifying the solid components separated by the solid component separating means. .
  3. 【請求項3】 前記固体成分分離手段により分離した固
    体成分を、該分離手段固体成分受器からストーカ炉の一
    次燃焼室に戻し、固体成分の灼熱減量の低減をはかるた
    めの戻入手段を備えたことを特徴とする請求項1記載の
    ストーカ式廃棄物ガス化焼却装置。
    3. A returning means for returning the solid component separated by the solid component separating means from the separating means solid component receiver to the primary combustion chamber of the stoker furnace to reduce the ignition loss of the solid component. The stoker-type waste gasification and incinerator according to claim 1, wherein
  4. 【請求項4】 前記ストーカ炉から発生する熱分解ガス
    から固体成分を分離した実質的可燃性気体成分を二次空
    気と共に燃焼させる二次燃焼炉に酸素富化手段を備え、
    高温完全燃焼可能としたことを特徴とする請求項1記載
    のストーカ式廃棄物ガス化焼却装置。
    4. A secondary combustion furnace for burning a substantially combustible gas component obtained by separating a solid component from a pyrolysis gas generated from the stoker furnace together with secondary air, is equipped with an oxygen enrichment means,
    The stoker-type waste gasification incinerator according to claim 1, which is capable of high temperature complete combustion.
  5. 【請求項5】 ストーカ炉の火格子の下流段域に酸素お
    よび/もしくは水蒸気を供給する手段を備え、前記戻入
    した固体成分のチャー分のガス化を促し、熱灼減量の低
    減を可能としたことを特徴とする請求項3記載のストー
    カ式廃棄物ガス化焼却装置。
    5. A means for supplying oxygen and / or steam to a downstream stage area of the grate of the stoker furnace is provided, which promotes gasification of the char component of the returned solid component, thereby enabling reduction of heat ablation. The stoker-type waste gasification and incinerator according to claim 3, characterized in that.
  6. 【請求項6】 ストーカ炉の火格子上に廃棄物を供給し
    て、一次空気と共に酸素不足下に燃焼させることにより
    発生する熱分解ガスから、固体成分を分離した後の実質
    的可燃性気体成分を二次空気と共に燃焼させることを特
    徴とするストーカ式廃棄物ガス化焼却方法。
    6. A substantially combustible gas component after separating a solid component from a pyrolysis gas generated by supplying waste on a grate of a stoker furnace and burning it together with primary air in a lack of oxygen. A stoker-type waste gasification and incineration method, characterized in that a stoker is combusted with secondary air.
  7. 【請求項7】 前記分離した固体成分を、溶融もしくは
    焙焼して無害化処理することを特徴とする請求項6記載
    のストーカ式廃棄物ガス化焼却方法。
    7. The stoker-type waste gasification and incineration method according to claim 6, wherein the separated solid component is subjected to detoxification treatment by melting or roasting.
  8. 【請求項8】 前記分離した固体成分を、ストーカ炉に
    戻入し、固体成分の熱灼減量の低減をはかることを特徴
    とする請求項6記載のストーカ式廃棄物ガス化焼却方
    法。
    8. The stoker-type waste gasification and incineration method according to claim 6, wherein the separated solid component is returned to the stoker furnace to reduce the amount of solid component heat ablation.
  9. 【請求項9】 前記一次空気の空気比を1以下とするこ
    とにより酸素不足下に燃焼させて熱分解ガスを発生させ
    るとともに、固体成分の同伴を抑制し、該発生熱分解ガ
    スから固体成分を分離した実質的可燃性気体成分を酸素
    富化した二次空気と共に燃焼させて、高温完全燃焼する
    ことを特徴とする請求項6記載のストーカ式廃棄物ガス
    化焼却方法。
    9. The primary air having an air ratio of 1 or less is combusted under oxygen deficiency to generate a pyrolysis gas, and entrainment of a solid component is suppressed, and a solid component is generated from the generated pyrolysis gas. The stoker-type waste gasification and incineration method according to claim 6, wherein the separated substantially combustible gas component is burned together with the oxygen-enriched secondary air to complete high temperature combustion.
  10. 【請求項10】 ストーカ炉の火格子の下流段域に酸素
    および/もしくは水蒸気を供給し、前記戻入した固体成
    分のチャー分のガス化を促し、熱灼減量を低減すること
    を特徴とする請求項8記載のストーカ式廃棄物ガス化焼
    却方法。
    10. An oxygen and / or water vapor is supplied to a downstream stage region of a grate of a stoker furnace to promote gasification of the char component of the returned solid component to reduce the amount of heat ablation. Item 8. A stoker-type waste gasification and incineration method according to Item 8.
JP2001361250A 2001-11-27 2001-11-27 Stoker type waste gasification incineration equipment and incineration method Withdrawn JP2003161414A (en)

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JP2006043605A (en) * 2004-08-05 2006-02-16 Kobelco Eco-Solutions Co Ltd Method and apparatus for treating landfill
JP2010216733A (en) * 2009-03-17 2010-09-30 Kubota Corp Waste treatment facility and waste treatment method
JP2011064411A (en) * 2009-09-17 2011-03-31 Nippon Steel Engineering Co Ltd Waste treatment method and waste treatment facility
CN102297433A (en) * 2011-05-31 2011-12-28 福建省丰泉环保控股有限公司 Method for removing dioxin from fume of garbage incinerator
JP2014514416A (en) * 2011-04-06 2014-06-19 イネオス バイオ ソシエテ アノニム Apparatus and method for gasification of carbonaceous material to produce syngas
CN106678830A (en) * 2016-12-30 2017-05-17 安徽海螺川崎工程有限公司 Waste incineration flue gas and air system and incineration control method
JP2019007699A (en) * 2017-06-27 2019-01-17 川崎重工業株式会社 Primary combustion gas supply control method, evaporation amount stabilization method, power generation amount stabilization method and fire grate type waste incinerator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006043605A (en) * 2004-08-05 2006-02-16 Kobelco Eco-Solutions Co Ltd Method and apparatus for treating landfill
JP2010216733A (en) * 2009-03-17 2010-09-30 Kubota Corp Waste treatment facility and waste treatment method
JP2011064411A (en) * 2009-09-17 2011-03-31 Nippon Steel Engineering Co Ltd Waste treatment method and waste treatment facility
JP2014514416A (en) * 2011-04-06 2014-06-19 イネオス バイオ ソシエテ アノニム Apparatus and method for gasification of carbonaceous material to produce syngas
CN102297433A (en) * 2011-05-31 2011-12-28 福建省丰泉环保控股有限公司 Method for removing dioxin from fume of garbage incinerator
CN106678830A (en) * 2016-12-30 2017-05-17 安徽海螺川崎工程有限公司 Waste incineration flue gas and air system and incineration control method
JP2019007699A (en) * 2017-06-27 2019-01-17 川崎重工業株式会社 Primary combustion gas supply control method, evaporation amount stabilization method, power generation amount stabilization method and fire grate type waste incinerator

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