JPH11141834A - Device for thermal decomposing and gasifying waste material - Google Patents
Device for thermal decomposing and gasifying waste materialInfo
- Publication number
- JPH11141834A JPH11141834A JP32719297A JP32719297A JPH11141834A JP H11141834 A JPH11141834 A JP H11141834A JP 32719297 A JP32719297 A JP 32719297A JP 32719297 A JP32719297 A JP 32719297A JP H11141834 A JPH11141834 A JP H11141834A
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- Japan
- Prior art keywords
- gas
- external heat
- furnace
- waste
- pyrolysis
- 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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- Gasification And Melting Of Waste (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は都市ごみなどの廃棄
物を熱分解ガス化すると共に熱分解残渣を溶融させるよ
うにした廃棄物熱分解ガス化溶融装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste pyrolysis gasification and melting apparatus for pyrolyzing waste such as municipal waste and melting a pyrolysis residue.
【０００２】[0002]
【従来の技術】現在の廃棄物の処理方式としては、焼却
炉にて廃棄物を燃焼するようにした燃焼方式が採用され
ている。2. Description of the Related Art As a current waste disposal system, a combustion system in which waste is burned in an incinerator is employed.
【０００３】しかしながら、上記燃焼方式の場合には、
燃焼排ガス中に含まれるダイオキシン発生の問題があ
ること、ガス量が多く熱エネルギーの利用効率が悪い
こと、灰が多量に出るのでその処理が大変であるこ
と、埋立地の容量が限界に近付いてきていること、等
の問題が提起されている。[0003] However, in the case of the above-mentioned combustion system,
There is a problem of dioxin generation in the flue gas, the amount of gas is large, the efficiency of using heat energy is inefficient, the ash is generated in large quantities, the treatment is difficult, and the capacity of landfills is approaching its limit. Issues have been raised.
【０００４】そのため、次世代の廃棄物処理方式とし
て、廃棄物を不活性雰囲気下で加熱して熱分解し、発生
した熱分解ガスと熱分解残渣（チャー）を溶融炉で空気
比１．３程度の少ない空気量で高温にして燃焼させ、廃
棄物中の灰分を溶融スラグとして取り出すようにしたガ
ス化・溶融方式が開発され、一部で実証運転が行われて
いる。かかる方式では、廃棄物を熱分解ガス化するため
に、外熱キルン方式を採用し、外部からの熱で廃棄物を
間接的に加熱、乾燥させて熱分解させるようにしてい
る。Therefore, as a next-generation waste treatment method, waste is heated and pyrolyzed in an inert atmosphere, and the generated pyrolysis gas and pyrolysis residue (char) are melted at an air ratio of 1.3 in a melting furnace. A gasification and melting system has been developed in which ash in waste is taken out as molten slag by burning at a high temperature with a small amount of air, and demonstration operation has been performed in some of them. In such a method, an external heat kiln is used to thermally decompose the waste into gas, and the waste is indirectly heated and dried by heat from the outside to be thermally decomposed.
【０００５】廃棄物を熱分解ガス化・溶融するために用
いられている熱分解ガス化溶融装置は、図２にその一例
の概要を示す如く、一端の入口２側よりも他端の出口３
側を約３度低くなるように傾斜させて横向きに配置した
ロータリー型の外熱キルン炉１の長手方向一端の入口２
に、給じん機４を設けて投入ホッパ５から廃棄物６を投
入するようにすると共に、上記外熱キルン炉１の長手方
向他端の出口３に、熱分解ガス６ａと熱分解残渣６ｂと
を分離する分離室７を設け、外熱キルン炉１を低速で回
転させた状態において、投入ホッパ５内から投入された
廃棄物６を給じん機４によって外熱キルン炉１内に徐々
に供給しつつ、外側の加熱流路８内に、熱回収空気１３
や補助燃料１２を用いて熱風発生炉９で発生させた高温
ガス（熱風）１０を、高温ガス送給ライン１１を通し出
口３側から入口２側へ向けて流通させることにより、外
熱キルン炉１内の廃棄物６を加熱、乾燥させて熱分解
し、発生した熱分解ガス６ａを、出口３部の分離室７の
上部に接続した熱分解ガス取出ライン１４を通して下流
の溶融炉１５に送るようにし、一方、不燃物を含む熱分
解残渣６ｂを、金属類６ｄを回収してから熱分解残渣ラ
イン１６により上記溶融炉１５へ送り、更に燃焼させて
溶融スラグ６ｃとして取り出すようにしてある。As shown in FIG. 2, a pyrolysis gasification / melting apparatus used for pyrolysis gasification and melting of wastes has an outlet 3 at one end rather than an inlet 2 at one end.
Inlet 2 at one end in the longitudinal direction of a rotary type external heat kiln furnace 1 arranged sideways with its side inclined at about 3 degrees lower
In addition, a dust feeder 4 is provided so that waste 6 is charged from a charging hopper 5, and a pyrolysis gas 6 a and a pyrolysis residue 6 b are provided to an outlet 3 at the other end in the longitudinal direction of the external heat kiln 1. A separation chamber 7 for separating the wastewater is provided, and in a state where the external heat kiln furnace 1 is rotated at a low speed, the waste 6 charged from the charging hopper 5 is gradually supplied into the external heat kiln furnace 1 by the duster 4. While the heat recovery air 13
A high-temperature gas (hot air) 10 generated in a hot-air generating furnace 9 by using a fuel gas and an auxiliary fuel 12 is passed through a high-temperature gas supply line 11 from an outlet 3 side to an inlet 2 side. The waste 6 in 1 is heated, dried and thermally decomposed, and the generated pyrolysis gas 6a is sent to a downstream melting furnace 15 through a pyrolysis gas extraction line 14 connected to the upper part of the separation chamber 7 at the three outlets. On the other hand, the pyrolysis residue 6b containing incombustibles is sent to the melting furnace 15 through the pyrolysis residue line 16 after recovering the metal 6d, and is further burned to be taken out as a molten slag 6c.
【０００６】なお、１７は外熱キルン炉１で用いた高温
ガス１０の燃焼排ガス１０ａを排出するための燃焼排ガ
スラインを示す。又、２８は燃焼排ガスライン１７に組
み付けたファンであり、燃焼排ガス１０ａを熱風発生炉
９へ循環させたり、余剰ガスを溶融炉１５の排ガス出口
部２０へ送るようにしてある。更に、２６は高温ガス送
給ライン１１に設けた温度制御器２７からの指令で開閉
制御される開閉制御弁を示す。Reference numeral 17 denotes a flue gas line for discharging the flue gas 10a of the high-temperature gas 10 used in the external heat kiln furnace 1. Reference numeral 28 denotes a fan assembled to the flue gas line 17, which circulates the flue gas 10 a to the hot-air generating furnace 9 and sends excess gas to the flue gas outlet 20 of the melting furnace 15. Reference numeral 26 denotes an open / close control valve that is opened / closed by a command from a temperature controller 27 provided in the high-temperature gas supply line 11.
【０００７】上記熱分解ガス化溶融装置では、外熱キル
ン炉１での熱分解により生成された熱分解残渣６ｂは、
分離室７の下部より一旦取り出して、アルミニウムや鉄
等の金属類６ｄを資源化物として回収する必要がある
が、そのために、外熱キルン炉１の加熱流路８に導入す
る高温ガス１０の温度としては、アルミニウムの融点以
下となるように、たとえば、５５０℃程度としてあり、
廃棄物６の熱分解及び乾燥に供した後、３５０℃程度の
燃焼排ガス１０ａとして排出され、一方、熱分解ガス６
ａは４５０℃程度として後工程へ送られるものである。In the above-mentioned pyrolysis gasification melting apparatus, the pyrolysis residue 6b generated by the pyrolysis in the external heat kiln 1 is
It is necessary to take out once from the lower part of the separation chamber 7 and recover metals 6d such as aluminum and iron as resources, and for that purpose, the temperature of the hot gas 10 introduced into the heating flow path 8 of the external heat kiln furnace 1 Is set to, for example, about 550 ° C. so as to be lower than the melting point of aluminum,
After subjecting the waste 6 to thermal decomposition and drying, it is discharged as a combustion exhaust gas 10a at about 350 ° C.
a is to be sent to a subsequent process at about 450 ° C.
【０００８】[0008]
【発明が解決しようとする課題】ところが、上記熱分解
ガス化溶融装置の場合、外熱キルン炉１は高温ガス１０
のみによる間接加熱方式であって伝熱効率が悪いので、
廃棄物６が保有する水分量が多い（低質ごみでは水分６
０％にも達する）ときには、熱分解反応が起る前提の乾
燥処理に多くの熱量と時間が必要となることから、外熱
キルン炉１のかなりの領域が乾燥領域として必要とな
り、外熱キルン炉１が長大化する問題がある。又、熱分
解ガス６ａ中には多くの水分が含まれていて熱分解ガス
の高カロリー化が図れず再利用が難しかった。However, in the case of the above-mentioned pyrolysis gasification and melting apparatus, the external heat kiln furnace 1 uses a high-temperature gas 10
Only indirect heating method and poor heat transfer efficiency,
Waste 6 has a large amount of water (for low-quality waste, water 6
0%), a large amount of heat and time are required for the drying process on the premise that the thermal decomposition reaction occurs. Therefore, a considerable area of the external heat kiln 1 is required as a drying area, and the external heat kiln is required. There is a problem that the furnace 1 becomes longer. In addition, the pyrolysis gas 6a contains a large amount of water, and the calorific value of the pyrolysis gas cannot be increased, so that it is difficult to reuse the pyrolysis gas.
【０００９】そこで、本発明は、外部燃料を使用せず、
余剰空気の投入や排ガス発生量を最小限に保ったまま
で、廃棄物の乾燥処理を短時間で行うことができるよう
にして、外熱キルン炉の小型化を図ると共に、より低カ
ロリーごみに対応でき、更に熱分解ガスの高カロリー化
を可能とすることができるようにしようとするものであ
る。Therefore, the present invention does not use an external fuel,
Waste drying process can be performed in a short time while keeping the amount of surplus air and the amount of exhaust gas kept to a minimum, reducing the size of the external heat kiln furnace and responding to lower calorie waste. It is intended to make it possible to increase the calories of the pyrolysis gas.
【００１０】[0010]
【課題を解決するための手段】本発明は、上記課題を解
決するために、外熱キルン炉内の廃棄物を、熱風発生炉
で発生させた高温ガスを熱源として乾燥、熱分解し、熱
分解ガス及び熱分解残渣を下流の溶融炉へ送って処理す
るようにしてある廃棄物熱分解ガス化溶融装置におい
て、上記外熱キルン炉の上流側に、該外熱キルン炉に供
給する前の廃棄物を乾燥させるために効率の高い直接接
触方式の通気乾燥機を設置し、且つ該通気乾燥機に、上
記外熱キルン炉の排気側の燃焼排ガスラインを接続し
て、該外熱キルン炉の加熱に使用した後の燃焼排ガスを
通気乾燥機の熱源として使用できるようにし、更に、上
記外熱キルン炉内での熱分解により生成された熱分解ガ
スの回収ラインを、上記熱風発生炉に導設して、熱分解
ガスの燃焼ガスを外熱キルン炉の熱源に使用するように
した構成とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to dry and thermally decompose waste in an external heat kiln furnace using a high-temperature gas generated in a hot-air generating furnace as a heat source. In a waste pyrolysis gasification and melting apparatus configured to send cracked gas and pyrolysis residue to a downstream melting furnace for processing, upstream of the external heat kiln furnace, before being supplied to the external heat kiln furnace Installing a highly efficient direct contact type through-air dryer to dry the waste, and connecting the flue gas line on the exhaust side of the above-mentioned externally-heated kiln furnace to the through-air dryer; The flue gas after being used for heating can be used as a heat source of a through-air dryer, and a recovery line for pyrolysis gas generated by pyrolysis in the external heat kiln furnace is connected to the hot air generation furnace. Install and heat the pyrolysis gas combustion gas A configuration which is adapted for use as a heat source for Lun furnace.
【００１１】廃棄物は、外熱キルン炉の燃焼排ガスを熱
源とする効率の高い通気乾燥機で乾燥させられてから、
外熱キルン炉に供給されて熱分解されるため、外熱キル
ン炉では、乾燥に要する領域を小さくすることができる
ことにより、小型化を図ることができる。又、熱分解ガ
ス中の水分が少なくなることから、高カロリーのガスを
取り出すことができる。しかも、外部燃料を使用せず、
系全体として空気量や排ガス量が増加しないシステムと
なる。[0011] The waste is dried by a high-efficiency through-air drier using the exhaust gas from the external heat kiln furnace as a heat source.
Since it is supplied to the external heat kiln furnace and thermally decomposed, in the external heat kiln furnace, the area required for drying can be reduced, so that downsizing can be achieved. Further, since the moisture in the pyrolysis gas is reduced, high calorie gas can be taken out. And without using external fuel,
The system as a whole does not increase the amount of air or exhaust gas.
【００１２】一方、通気乾燥機の排気ラインを、溶融炉
の排ガス出口部に導設した構成とすることにより、通気
乾燥機から排出された多量の水分を含んだガスが溶融炉
の排ガス出口部へ導かれて、１３００℃以上の溶融排ガ
スに混合することで８００℃以上に保持され臭気成分が
分解される。また、従来のように全排ガスを溶融温度
（１３００℃以上）に昇温する必要がないため、より低
カロリーごみでの運転が可能となる。On the other hand, by providing the exhaust line of the through-flow dryer at the exhaust gas outlet of the melting furnace, the gas containing a large amount of water discharged from the through-dryer can be discharged. And mixed with the molten exhaust gas at 1300 ° C. or more, the temperature is maintained at 800 ° C. or more, and the odor component is decomposed. Further, since it is not necessary to raise the entire exhaust gas to the melting temperature (1300 ° C. or higher) unlike the conventional case, the operation with lower calorie waste becomes possible.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１は本発明の実施の一形態を示すもの
で、図２に示したと同様な構成において、外熱キルン炉
１の上流側に、該外熱キルン炉１に供給する前の廃棄物
６を乾燥させるための直接接触方式の通気乾燥機１８を
前処理装置として設置し、且つ該通気乾燥機１８に、外
熱キルン炉１の燃焼排ガスライン１７を接続して、外熱
キルン炉１での廃棄物６の熱分解に供した後の燃焼排ガ
ス１０ａを通気乾燥機１８の乾燥熱源として導けるよう
にし、更に、上記通気乾燥機１８の排気ライン１９を熱
風発生炉９へ導いて乾燥排ガス１０ｂを循環させるよう
にし、且つ排気ライン１９から分岐させた排気ライン２
９を溶融炉１５の排ガス出口部２０に導設して、乾燥排
ガス１０ｂの余剰分を溶融炉１５の排ガス２１に混入し
て高温処理させられるようにする。FIG. 1 shows an embodiment of the present invention. In a configuration similar to that shown in FIG. 2, a waste before being supplied to the external heat kiln 1 is disposed upstream of the external heat kiln 1. A direct contact type air dryer 18 for drying the object 6 is installed as a pretreatment device, and the exhaust gas line 17 of the external heat kiln furnace 1 is connected to the air dryer 18 so that the external heat kiln furnace The combustion exhaust gas 10a after being subjected to the thermal decomposition of the waste 6 in Step 1 can be led as a drying heat source for the through-air dryer 18, and the exhaust line 19 of the through-air dryer 18 is guided to the hot-air generating furnace 9 for drying. Exhaust line 2 that circulates exhaust gas 10b and branches off from exhaust line 19
9 is guided to the exhaust gas outlet 20 of the melting furnace 15 so that the excess of the dried exhaust gas 10b is mixed into the exhaust gas 21 of the melting furnace 15 to be subjected to high-temperature treatment.
【００１５】又、上記外熱キルン炉１の分離室７と下流
側の溶融炉１５との間に接続された熱分解ガス取出ライ
ン１４の途中に、集じん器２２を介在設置し、該集じん
器２２の下流側に位置する熱分解ガス取出ライン１４の
途中から回収ライン２３を分岐させて、該回収ライン２
３を熱風発生炉９に導設し、集じん器２２を通過した後
の熱分解ガス６ａを熱風発生炉９に供給できるように
し、更に、上記集じん器２２と熱分解残渣ライン１６と
の間に、集じん器２２で捕集した熱分解残渣６ｂを熱分
解残渣ライン１６に戻すための戻しライン２４を設け
る。A dust collector 22 is provided in the middle of a pyrolysis gas extraction line 14 connected between the separation chamber 7 of the external heat kiln furnace 1 and the downstream melting furnace 15. The recovery line 23 is branched from the middle of the pyrolysis gas extraction line 14 located on the downstream side of the
3 is introduced into the hot-air generating furnace 9 so that the pyrolysis gas 6 a after passing through the dust collector 22 can be supplied to the hot-air generating furnace 9. In between, a return line 24 for returning the pyrolysis residue 6b collected by the dust collector 22 to the pyrolysis residue line 16 is provided.
【００１６】なお、２５は通気乾燥機１８の給じん機、
２６は高温ガス送給ライン１１に設けた温度制御器２７
からの指令で開閉制御されるように回収ライン２３中に
設けた開閉制御弁を示す。In addition, 25 is a duster of the through-air dryer 18,
Reference numeral 26 denotes a temperature controller 27 provided in the high-temperature gas supply line 11.
2 shows an opening / closing control valve provided in the recovery line 23 so as to be opened / closed in accordance with a command from the apparatus.
【００１７】上記構成としてある本発明の廃棄物熱分解
ガス化溶融装置では、外熱キルン炉１で廃棄物６を加
熱、乾燥して熱分解させる前に、通気乾燥機１８で廃棄
物６を乾燥させて５０％以上の水分を除去し、乾燥後の
廃棄物６を外熱キルン炉１に供給するようにさせる。In the waste pyrolysis gasification / melting apparatus of the present invention having the above-described structure, the waste 6 is heated and dried in the external heat kiln 1 to be thermally decomposed before the waste 6 is dried by the through-air dryer 18. After drying, 50% or more of water is removed, and the waste 6 after drying is supplied to the external heat kiln 1.
【００１８】上記の場合、熱風発生炉９で発生させた５
５０℃の高温ガス１０を、高温ガス送給ライン１１を通
し外熱キルン炉１の加熱流路８に流通させるようにして
運転を行うと、運転中は、外熱キルン炉１での廃棄物６
の熱分解に供した後の燃焼排ガス１０ａが３５０℃程度
として排出されるため、この３５０℃程度の温度を保有
する燃焼排ガス１０ａが通気乾燥機１８の熱源として燃
焼排ガスライン１７を通り通気乾燥機１８に供給され
る。In the above case, the 5 generated by the hot-air generating furnace 9
When the operation is performed in such a manner that the high-temperature gas 10 of 50 ° C. is passed through the high-temperature gas supply line 11 to the heating flow path 8 of the external heat kiln furnace 1, the waste in the external heat kiln furnace 1 is operated during the operation. 6
Since the flue gas 10a after being subjected to the thermal decomposition of the exhaust gas is discharged at about 350 ° C., the flue gas 10a having a temperature of about 350 ° C. 18.
【００１９】上記通気乾燥機１８では、供給された燃焼
排ガス１０ａによって直接接触加熱により廃棄物６が乾
燥させられることになる。この際、乾燥に供した３５０
℃の燃焼排ガス１０ａは約１５０℃の乾燥排ガス１０ｂ
として排気ライン１９より排気される。続いて、通気乾
燥機１８で乾燥させられた廃棄物６が外熱キルン炉１に
供給されることになるため、外熱キルン炉１では、短時
間で廃棄物６を熱分解することができる。したがって、
外熱キルン炉１の乾燥領域をこれまでよりも短くするこ
とができるので、外熱キルン炉１を全体的に小型化する
ことができる。又、多くの水分が除去された廃棄物６を
熱分解するので、熱分解ガス６ａ中の水分量も少なくな
り、高カロリーのガスを取り出すことができるようにな
る。更に、この高カロリー化された熱分解ガス６ａが熱
分解ガス取出ライン１４から回収ライン２３を経て熱風
発生炉９に供給されるため、熱分解ガス６ａを外熱キル
ン炉１の熱源として有効に使用することが可能となる。In the through-air dryer 18, the waste 6 is dried by direct contact heating with the supplied combustion exhaust gas 10a. At this time, 350
Combustion exhaust gas 10a of about 150 ° C is dried exhaust gas 10b of about 150 ° C
Is exhausted from the exhaust line 19. Subsequently, the waste 6 dried by the through-air dryer 18 is supplied to the external heat kiln furnace 1, so that the waste 6 can be thermally decomposed in a short time in the external heat kiln furnace 1. . Therefore,
Since the drying area of the external heat kiln 1 can be made shorter than before, the external heat kiln 1 can be downsized as a whole. Further, since the waste 6 from which a large amount of water has been removed is thermally decomposed, the amount of water in the pyrolysis gas 6a is also reduced, and a high-calorie gas can be taken out. Further, since the high-calorie pyrolysis gas 6a is supplied from the pyrolysis gas extraction line 14 to the hot air generator 9 through the recovery line 23, the pyrolysis gas 6a is effectively used as a heat source of the external heat kiln furnace 1. It can be used.
【００２０】一方、上記通気乾燥機１８で廃棄物６の乾
燥に供した後の乾燥排ガス１０ｂは水分の他に臭気成分
を含んでいるが、排気ライン１９，２９を通り溶融炉１
５の排ガス出口部２０に導かれるため、ここで、１３０
０℃前後の溶融排ガス２１に混入されることにより、高
温分解させられて８００℃以上のガスとして排出され
る。On the other hand, the dried exhaust gas 10b which has been subjected to the drying of the waste 6 by the through-air dryer 18 contains odor components in addition to moisture, but passes through the exhaust lines 19 and 29 and the melting furnace 1
5 to the exhaust gas outlet 20 of FIG.
When mixed into the molten exhaust gas 21 at around 0 ° C., it is decomposed at a high temperature and discharged as a gas at 800 ° C. or higher.
【００２１】上述したように、本発明では、廃棄物６
を、外熱キルン炉１で熱分解する前処理として通気乾燥
機１８で乾燥させるようにするので、水分の多い低質の
廃棄物６でも効率よくガス化することができる。又、通
気乾燥機１８の熱源としては外熱キルン炉１の燃焼排ガ
ス１０ａを利用し、外熱キルン炉１の熱源としては熱分
解ガス６ａを利用しているので、乾燥のために別の熱源
を必要としない点においても有利である。更に、全燃焼
ガスを１３００℃以上の高温にする必要がないため従来
に比べるとより低カロリーごみに対応できるようにな
る。As described above, according to the present invention, waste 6
Is dried by the through-air dryer 18 as a pretreatment for thermal decomposition in the external heat kiln furnace 1, so that even low-quality waste 6 having a large amount of water can be efficiently gasified. Further, since the combustion exhaust gas 10a of the external heat kiln furnace 1 is used as the heat source of the through-air dryer 18 and the pyrolysis gas 6a is used as the heat source of the external heat kiln furnace 1, another heat source is used for drying. This is also advantageous in that it is not required. Further, since it is not necessary to raise the total combustion gas temperature to 1300 ° C. or higher, it is possible to cope with low-calorie refuse as compared with the related art.
【００２２】[0022]
【発明の効果】以上述べた如く、本発明によれば、外熱
キルン炉内の廃棄物を、熱風発生炉で発生させた高温ガ
スを熱源として乾燥、熱分解し、熱分解ガス及び熱分解
残渣を下流の溶融炉へ送って処理するようにしてある廃
棄物熱分解ガス化溶融装置において、上記外熱キルン炉
の上流側に、該外熱キルン炉に供給する前の廃棄物を乾
燥させるための通気乾燥機を設置し、且つ該通気乾燥機
に、上記外熱キルン炉の燃焼排ガスラインを接続して、
該外熱キルン炉からの燃焼排ガスを通気乾燥機の熱源と
して使用できるようにし、更に、上記外熱キルン炉内で
の熱分解により生成された熱分解ガスの回収ラインを、
上記熱風発生炉に導設して、熱分解ガスの燃焼ガスを外
熱キルン炉の熱源に使用するようにした構成としてある
ので、次の如き優れた効果を発揮する。 (1) 外熱キルン炉での廃棄物の熱分解ガス化の前処理と
して、廃棄物を通気乾燥機で乾燥させることができるの
で、水分の多い廃棄物であっても対処でき、外熱キルン
炉で廃棄物を短時間で熱分解ガス化することができるこ
とにより、外熱キルン炉の小型化を図ることができる。 (2) 水分の少ない状態の廃棄物を熱分解ガス化するの
で、熱分解ガスの高カロリー化が可能となり、これによ
り、熱分解ガスを外熱キルン炉の熱源として使用するこ
とができる。 (3) 通気乾燥機の熱源に、外熱キルン炉加熱用の燃焼排
ガスを使用することから、前処理としての乾燥のために
別途熱源が不要であり、全体として空気比１．３以下の
運転が保持できるためエネルギーの効率利用の面でも有
利である。 (4) 通気乾燥機の排気ラインを、溶融炉の排ガス出口部
に導設した構成とすることにより、通気乾燥機の乾燥排
ガスを溶融炉の高温排ガスに混入することができ、乾燥
排ガス中に含まれる臭気成分を分解することができる。 (5) 燃焼ガス全体を１３００℃以上に上げずに運転でき
ることになるため、より低カロリーごみへの対応が可能
となる。As described above, according to the present invention, the waste in the external heat kiln is dried and thermally decomposed using the high-temperature gas generated in the hot-air generating furnace as a heat source, and the pyrolysis gas and the pyrolysis are obtained. In a waste pyrolysis gasification / melting apparatus in which the residue is sent to a downstream melting furnace for processing, the waste before being supplied to the external heat kiln furnace is dried on the upstream side of the external heat kiln furnace. Install a through-air dryer for, and connect the flue gas line of the external heat kiln furnace to the through-air dryer,
The flue gas from the external heat kiln furnace can be used as a heat source of a through-air dryer, and furthermore, a recovery line for pyrolysis gas generated by thermal decomposition in the external heat kiln furnace,
Since the configuration is such that the combustion gas of the pyrolysis gas is used as a heat source of the external heat kiln furnace by being introduced into the hot air generation furnace, the following excellent effects are exhibited. (1) As a pretreatment for pyrolysis gasification of waste in an external heat kiln furnace, waste can be dried with a through-air dryer, so even waste with high moisture content can be dealt with. Since the waste can be pyrolyzed and gasified in a short time in the furnace, the external heat kiln furnace can be reduced in size. (2) Pyrolysis gasification of waste with a low moisture content makes it possible to increase the calorie of the pyrolysis gas, thereby making it possible to use the pyrolysis gas as a heat source of an external heat kiln furnace. (3) Since the combustion exhaust gas for heating the external heat kiln furnace is used as the heat source for the through-air dryer, no separate heat source is required for drying as a pre-treatment, and the overall operation is at an air ratio of 1.3 or less. Can be maintained, which is advantageous in terms of efficient use of energy. (4) By adopting a configuration in which the exhaust line of the through-air dryer is led to the exhaust gas outlet of the melting furnace, the drying exhaust gas of the through-air dryer can be mixed with the high-temperature exhaust gas of the melting furnace. The contained odor components can be decomposed. (5) Since operation can be performed without raising the entire combustion gas to 1300 ° C. or higher, it is possible to deal with lower calorie waste.
【図１】本発明の廃棄物熱分解ガス化溶融装置の実施の
一形態を示す概要図である。FIG. 1 is a schematic diagram showing one embodiment of a waste pyrolysis gasification and melting apparatus of the present invention.
【図２】廃棄物熱分解ガス化溶融装置の一例を示す概要
図である。FIG. 2 is a schematic diagram illustrating an example of a waste pyrolysis gasification and melting apparatus.
１ 外熱キルン炉 ６ 廃棄物 ６ａ 熱分解ガス ６ｂ 熱分解残渣 ６ｃ 溶融スラグ ８ 加熱流路 ９ 熱風発生炉 １０ 高温ガス １０ａ 燃焼排ガス １７ 燃焼排ガスライン １８ 通気乾燥機 １９ 排気ライン ２０ 排ガス出口部 ２９ 排気ライン DESCRIPTION OF SYMBOLS 1 External heat kiln furnace 6 Waste 6a Pyrolysis gas 6b Pyrolysis residue 6c Molten slag 8 Heating channel 9 Hot air generator 10 High temperature gas 10a Combustion exhaust gas 17 Combustion exhaust gas line 18 Ventilation dryer 19 Exhaust line 20 Exhaust gas outlet 29 Exhaust gas line
フロントページの続き (72)発明者 萩谷 宗高 東京都江東区豊洲三丁目１番15号 石川島 播磨重工業株式会社東二テクニカルセンタ ー内Continued on the front page (72) Inventor Munetaka Hagiya Inside 1-1-2 Toyosu 3-chome, Koto-ku, Tokyo Ishikawajima-Harima Heavy Industries Co., Ltd.
Claims (2)
で発生させた高温ガスを熱源として乾燥、熱分解し、熱
分解ガス及び熱分解残渣を下流の溶融炉へ送って処理す
るようにしてある廃棄物熱分解ガス化溶融装置におい
て、上記外熱キルン炉の上流側に、該外熱キルン炉に供
給する前の廃棄物を乾燥させるための通気乾燥機を設置
し、且つ該通気乾燥機に、上記外熱キルン炉の加熱に使
用した後の燃焼排ガスラインを接続して、該外熱キルン
炉からの燃焼排ガスを通気乾燥機の熱源として使用でき
るようにし、更に、上記外熱キルン炉内での熱分解によ
り生成された熱分解ガスの回収ラインを、上記熱風発生
炉に導設して、熱分解ガスの燃焼ガスを外熱キルン炉の
熱源に使用するようにした構成を有することを特徴とす
る廃棄物熱分解ガス化溶融装置。1. The waste in an external heat kiln furnace is dried and thermally decomposed using a high-temperature gas generated in a hot air generation furnace as a heat source, and the pyrolysis gas and pyrolysis residue are sent to a downstream melting furnace for processing. In the waste pyrolysis gasification and melting apparatus as described above, a ventilation dryer for drying waste before being supplied to the external heat kiln furnace is installed on the upstream side of the external heat kiln furnace; and The flue gas line used for heating the external heat kiln furnace is connected to the through-air dryer, so that the flue gas from the external heat kiln furnace can be used as a heat source of the through-air dryer. A configuration in which a recovery line for a pyrolysis gas generated by pyrolysis in a thermal kiln is guided to the hot blast generating furnace so that a combustion gas of the pyrolysis gas is used as a heat source of the external heat kiln. Waste pyrolysis gasification characterized by having Melting equipment.
ガス出口部に導設した請求項１記載の廃棄物熱分解ガス
化溶融装置。2. The waste pyrolysis gasification and melting apparatus according to claim 1, wherein an exhaust line of the through-air dryer is introduced to an exhaust gas outlet of the melting furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32719297A JP4155365B2 (en) | 1997-11-13 | 1997-11-13 | Waste pyrolysis gasification melting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32719297A JP4155365B2 (en) | 1997-11-13 | 1997-11-13 | Waste pyrolysis gasification melting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11141834A true JPH11141834A (en) | 1999-05-28 |
| JP4155365B2 JP4155365B2 (en) | 2008-09-24 |
Family
ID=18196348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32719297A Expired - Lifetime JP4155365B2 (en) | 1997-11-13 | 1997-11-13 | Waste pyrolysis gasification melting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4155365B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001023806A1 (en) * | 1999-09-29 | 2001-04-05 | World Oasis Australia Pty Ltd | Process and system for recovering energy from carbon-containing materials |
| JP2007314625A (en) * | 2006-05-24 | 2007-12-06 | Ihi Corp | Manufacturing method of mixed fuel of sludge with carbonized product of waste, and apparatus |
| JP2007314624A (en) * | 2006-05-24 | 2007-12-06 | Ihi Corp | Manufacturing method of mixed fuel of dried sludge with carbonized product of waste, and apparatus |
| JP2008249212A (en) * | 2007-03-29 | 2008-10-16 | Ihi Corp | Waste thermal decomposition gasification method and device |
| JP2011067800A (en) * | 2009-09-28 | 2011-04-07 | Ihi Corp | Method and apparatus for pyrolyzing waste |
| CN102840587A (en) * | 2012-09-03 | 2012-12-26 | 林秀梅 | Compound method and system for directly recovering heat inside and outside rotary kiln |
| WO2014032305A1 (en) * | 2012-09-03 | 2014-03-06 | Lin Xiumei | Inner and outer heat compound system and method for directly recovering heat of rotary kiln |
-
1997
- 1997-11-13 JP JP32719297A patent/JP4155365B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001023806A1 (en) * | 1999-09-29 | 2001-04-05 | World Oasis Australia Pty Ltd | Process and system for recovering energy from carbon-containing materials |
| US6863004B1 (en) | 1999-09-29 | 2005-03-08 | World Oasis Australia Pty Ltd. | Process and system for recovering energy from carbon-containing materials |
| JP2007314625A (en) * | 2006-05-24 | 2007-12-06 | Ihi Corp | Manufacturing method of mixed fuel of sludge with carbonized product of waste, and apparatus |
| JP2007314624A (en) * | 2006-05-24 | 2007-12-06 | Ihi Corp | Manufacturing method of mixed fuel of dried sludge with carbonized product of waste, and apparatus |
| JP2008249212A (en) * | 2007-03-29 | 2008-10-16 | Ihi Corp | Waste thermal decomposition gasification method and device |
| JP2011067800A (en) * | 2009-09-28 | 2011-04-07 | Ihi Corp | Method and apparatus for pyrolyzing waste |
| CN102840587A (en) * | 2012-09-03 | 2012-12-26 | 林秀梅 | Compound method and system for directly recovering heat inside and outside rotary kiln |
| WO2014032305A1 (en) * | 2012-09-03 | 2014-03-06 | Lin Xiumei | Inner and outer heat compound system and method for directly recovering heat of rotary kiln |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4155365B2 (en) | 2008-09-24 |
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