JPH09273724A - Structure of exhaust heat recovery part for waste treating device - Google Patents
Structure of exhaust heat recovery part for waste treating deviceInfo
- Publication number
- JPH09273724A JPH09273724A JP7910596A JP7910596A JPH09273724A JP H09273724 A JPH09273724 A JP H09273724A JP 7910596 A JP7910596 A JP 7910596A JP 7910596 A JP7910596 A JP 7910596A JP H09273724 A JPH09273724 A JP H09273724A
- Authority
- JP
- Japan
- Prior art keywords
- flue
- waste
- wall
- air heater
- heat boiler
- 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- Withdrawn
Links
Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、廃棄物の処理装置
における排熱回収部構造、より詳しくは廃棄物を大気圧
以下の低酸素雰囲気で加熱して熱分解し、乾留ガスと熱
分解残留物とを生成し、この乾留ガスと熱分解残留物か
ら分離された燃焼性成分とを燃焼器に供給して燃焼処理
し、この燃焼器からの排熱を回収するようにした廃棄物
処理装置における排熱回収部構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an exhaust heat recovery unit in a waste treatment apparatus, and more specifically, it heats a waste material in a low oxygen atmosphere below atmospheric pressure to thermally decompose it, and produces a dry distillation gas and a thermal decomposition residue. Waste treatment device for producing waste materials, supplying the dry distillation gas and the combustible components separated from the pyrolysis residue to a combustor for combustion treatment, and recovering exhaust heat from the combustor. The exhaust heat recovery part structure.
【0002】[0002]
【従来の技術】都市ごみなどの一般廃棄物や廃プラスチ
ックなどの可燃物を含む産業廃棄物処理装置の一つとし
て廃棄物を熱分解反応器に入れて大気圧以下の低酸素雰
囲気ないしは非酸化雰囲気において加熱して熱分解し、
乾留ガスと主として不揮発性成分よりなる熱分解残留物
とを生成し、さらに熱分解残留物を冷却した後、分離装
置に供給してカーボンを主体とする燃焼性成分と、例え
ば金属や陶器、砂利、コンクリート片等のガレキよりな
る不燃焼性成分とに分離し、燃焼性成分を粉砕し、この
粉砕された燃焼性成分と前記した乾留ガスとを燃焼器で
ある溶融炉に導き、この溶融炉で燃焼処理し、生じた燃
焼灰と燃焼ガスの内燃焼灰は溶融スラグとして排出して
冷却固化し、一方、燃焼ガスは空気加熱器を経て廃熱ボ
イラに供給して熱回収されるようにした廃棄物処理装置
が知られている(例えば特開昭64−49816号)。2. Description of the Related Art Waste is put into a thermal decomposition reactor as one of industrial waste treatment devices containing general waste such as municipal waste and combustibles such as waste plastic, and a low oxygen atmosphere below atmospheric pressure or non-oxidizing. It is heated in the atmosphere and pyrolyzed,
It produces dry distillation gas and a pyrolysis residue mainly consisting of non-volatile components, and after cooling the pyrolysis residue, it supplies it to a separation device and combustible components mainly composed of carbon, such as metal, pottery, and gravel. , Separated into non-combustible components made of rubble such as concrete pieces, pulverizing the combustible components, introducing the pulverized combustible components and the above-mentioned carbonization gas into a melting furnace which is a combustor, and the melting furnace The combustion ash and the combustion ash in the combustion gas generated are discharged as molten slag and cooled and solidified, while the combustion gas is supplied to the waste heat boiler via the air heater so that heat is recovered. A known waste treatment device is known (for example, JP-A-64-49816).
【0003】[0003]
【発明が解決しようとする課題】ところで前記したよう
な従来の廃棄物処理装置においては、燃焼器である溶融
炉から排出される燃焼ガスは空気加熱器において熱回収
された後、排気管を経て廃熱ボイラに供給されて再度熱
回収されるようになっているため特別の排気管を設ける
必要があるばかりでなく、広い据付場所を必要とした。In the conventional waste treatment apparatus as described above, the combustion gas discharged from the melting furnace, which is a combustor, is recovered in the air heater and then passed through the exhaust pipe. Since it was supplied to the waste heat boiler and heat was recovered again, not only was it necessary to install a special exhaust pipe, but it also required a large installation space.
【0004】[0004]
【課題を解決するための手段】本発明は、前記したよう
な従来の装置の持つ問題点を解決するためになされたも
のであって、廃棄物を内部が大気圧以下に保持される、
低酸素雰囲気の熱分解反応器に投入し、この廃棄物を加
熱して熱分解し、乾留ガスと主として不揮発性成分より
なる熱分解残留物とよりなる熱分解生成物を生成し、熱
分解残留物から分離された燃焼性成分と前記乾留ガスと
を燃焼器で燃焼処理させるとともに、該燃焼器で発生す
る燃焼ガスを空気加熱器及び廃熱ボイラに供給して排熱
回収するようにした廃棄物処理装置において、前記空気
加熱器を前記燃焼器に連なりかつ水冷壁より構成される
第1の煙道内に配置し、該第1の煙道を水冷壁よりなる
第2の煙道を介して前記廃熱ボイラに連通させるととも
に、前記第1の煙道を構成する後壁が前記第2の煙道を
構成する前壁となるよう構成した廃棄物処理装置におけ
る排熱回収部構造を提供せんとするものである。そして
第1の煙道を構成する水冷壁内には耐火材が張設され
る。SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the above-mentioned conventional apparatus, in which waste is kept under atmospheric pressure.
It is put into a pyrolysis reactor in a low oxygen atmosphere, and this waste is heated and pyrolyzed to produce a pyrolysis product composed of a dry distillation gas and a pyrolysis residue mainly composed of non-volatile components, and the pyrolysis residue. Combustible components separated from the product and the dry distillation gas are burned in a combustor, and the combustion gas generated in the combustor is supplied to an air heater and a waste heat boiler to recover exhaust heat. In the object processing apparatus, the air heater is arranged in a first flue which is connected to the combustor and is composed of a water cooling wall, and the first flue is connected through a second flue composed of a water cooling wall. An exhaust heat recovery unit structure in a waste treatment device is provided, which communicates with the waste heat boiler and is configured such that a rear wall forming the first flue becomes a front wall forming the second flue. It is what A refractory material is stretched in the water cooling wall that constitutes the first flue.
【0005】かゝる廃棄物処理装置における排熱回収部
構造において燃焼器から排出される高温の燃焼ガスは、
例えば900℃〜950℃で第1の煙道に供給され、こ
こで熱回収され、800℃程度の燃焼ガスとなって第2
の煙道に流入する。そしてここの水冷壁により冷却され
600℃〜650℃となって廃熱ボイラ内に供給され、
再び熱回収され200〜280℃となって後流に配置さ
れる集塵装置及び洗浄装置に供給される。The hot combustion gas discharged from the combustor in the structure of the exhaust heat recovery section of such a waste treatment device is
For example, it is supplied to the first flue at 900 ° C to 950 ° C, where heat is recovered and becomes combustion gas at about 800 ° C, which is the second.
Flows into the flue of. And it is cooled by the water-cooled wall here, and it is 600 ℃ -650 ℃, and it is supplied into the waste heat boiler.
The heat is recovered again to reach 200 to 280 ° C., and the dust is supplied to the dust collector and the cleaning device arranged in the downstream.
【0006】このとき第1の煙道を構成する後壁がこの
第1の煙道に連なる第2の煙道の前壁として構成されて
いるため、特別の排気管を設ける必要もなくそのため装
置がコンパクト化され広い据付場所を必要としないので
ある。At this time, since the rear wall forming the first flue is formed as the front wall of the second flue connected to the first flue, it is not necessary to provide a special exhaust pipe, and therefore the device is not provided. Is compact and does not require a large installation space.
【0007】[0007]
【発明の実施の形態】以下図1乃至図2に基づき本発明
による廃棄物処理装置における排熱回収部構造の実施形
態を説明する。図1は本発明による排熱回収部構造を有
する廃棄物処理装置の系統図である。1は熱分解反応器
であって、好ましくは横型回転式ドラムで構成され、こ
の熱分解反応器1は図示しないシール機構によって投入
口等とシール状態で連結され、誘引送風機2により内部
は大気圧以下の低酸素雰囲気に保持されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an exhaust heat recovery part structure in a waste treatment apparatus according to the present invention will be described below with reference to FIGS. FIG. 1 is a system diagram of a waste treatment device having an exhaust heat recovery unit structure according to the present invention. Reference numeral 1 denotes a thermal decomposition reactor, which is preferably composed of a horizontal rotary drum, and this thermal decomposition reactor 1 is connected in a sealed state with an inlet or the like by a sealing mechanism (not shown), and an internal air pressure is induced by an induced blower 2 The following low oxygen atmosphere is maintained.
【0008】そしてこの熱分解反応器1内には図示しな
い破砕機により破砕された廃棄物aが投入口3から供給
される。そしてこの廃棄物aは熱分解反応器1の後段に
配置されている第1の煙道4内に配置された空気加熱器
5からラインL1 を経て供給される加熱空気bにより3
00℃〜600℃に、通常は450℃程度に加熱されて
熱分解して乾留ガスG1 と主として不揮発性成分よりな
る熱分解残留物cとを生成する。Then, a waste a crushed by a crusher (not shown) is supplied into the thermal decomposition reactor 1 through an input port 3. Then, this waste a is separated by heating air b supplied from the air heater 5 arranged in the first flue 4 arranged in the latter stage of the thermal decomposition reactor 1 through the line L 1 into the waste a.
It is heated to 00 ° C. to 600 ° C., usually about 450 ° C., and thermally decomposed to produce a dry distillation gas G 1 and a thermal decomposition residue c mainly composed of a non-volatile component.
【0009】この乾留ガスG1 と熱分解残留物cとは熱
分解反応器1の出口側に配置されている排出装置6で分
離され、乾留ガスG1 はラインL2 を経て燃焼器である
溶融炉7のバーナ8に供給される。一方、排出装置6で
分離された熱分解残留物cは冷却装置9で発火しない温
度、例えば80℃程度まで冷却された後、分離装置10
でカーボン等の燃焼性成分dと、金属やガレキ等の不燃
焼性成分eとに分離され、不燃焼性成分eはコンテナ1
1に回収される。そして燃焼性成分dは粉砕機12で例
えば1mm以下に粉砕される。The dry distillation gas G 1 and the pyrolysis residue c are separated by the discharge device 6 arranged on the outlet side of the pyrolysis reactor 1, and the dry distillation gas G 1 is a combustor via a line L 2. It is supplied to the burner 8 of the melting furnace 7. On the other hand, the thermal decomposition residue c separated by the discharging device 6 is cooled by the cooling device 9 to a temperature at which it does not ignite, for example, about 80 ° C.
Is separated into a combustible component d such as carbon and a non-combustible component e such as metal or rubble, and the non-combustible component e is contained in the container 1
Collected in 1. Then, the combustible component d is pulverized by the pulverizer 12 to, for example, 1 mm or less.
【0010】そしてこの粉砕された燃焼性成分d′はラ
インL3 を経てバーナ8に供給されてラインL2 から供
給された乾留ガスG1 と、押込送風機13によりライン
L4を経て供給される燃焼用空気fとにより溶融炉7内
で約1,300℃程度の高温域で燃焼処理される。この
燃焼処理により溶融炉7内で発生した燃焼灰は溶融さ
れ、溶融スラグgとなって水槽14内に流下し、冷却固
化されるとともに燃焼ガスG2 は第1の煙道4を経て廃
熱ボイラ15内に導かれ熱回収される。The pulverized combustible component d'is supplied to the burner 8 via the line L 3 and the dry distillation gas G 1 supplied from the line L 2 and the line B 4 by the forced blower 13. Combustion processing is performed in the melting furnace 7 in the high temperature region of about 1,300 ° C. with the combustion air f. The combustion ash generated in the melting furnace 7 is melted by this combustion process, becomes molten slag g, flows down into the water tank 14, is cooled and solidified, and the combustion gas G 2 passes through the first flue 4 to generate waste heat. It is introduced into the boiler 15 and heat is recovered.
【0011】詳述すれば、図2に示されるように第1の
煙道4は、水冷壁よりなる前壁4aと後壁4bと、図示
しない両側壁とより断面方形状に構成され、この第1の
煙道4内はそれぞれ耐火材16が貼られている。そして
この第1の煙道4内には空気加熱器5が配置されてい
る。この第1の煙道4の後流(図示例では上端)には第
2の煙道17が燃焼ガスがジグザグに方向転換する形で
直結されている。この第2の煙道17は水冷壁よりなる
中間壁17aと後壁17bと図示されない側壁とで構成
され、そして前壁は第1の煙道4を構成している後壁4
bが兼用している。更にこの第2の煙道17の後流に廃
熱ボイラ15,15が配置されている。More specifically, as shown in FIG. 2, the first flue 4 is constituted by a front wall 4a and a rear wall 4b, which are water-cooling walls, and both side walls (not shown). A refractory material 16 is attached inside each of the first flues 4. An air heater 5 is arranged in the first flue 4. A second flue 17 is directly connected to the wake (upper end in the illustrated example) of the first flue 4 in such a manner that the combustion gas turns in a zigzag direction. The second flue 17 is composed of an intermediate wall 17a made of a water cooling wall, a rear wall 17b and a side wall (not shown), and the front wall is the rear wall 4 which constitutes the first flue 4.
b is also used. Further, waste heat boilers 15 and 15 are arranged downstream of the second flue 17.
【0012】溶融炉7で発生した燃焼ガスG2 は第1の
煙道4の入口(下部)で900℃〜950℃で流入し、
空気加熱器5で熱交換され、800℃程度となって第2
の煙道17に流入して煙道の周囲の水冷壁で熱吸収さ
れ、600℃〜650℃に温度が低下した燃焼ガスG2
となり、第2の煙道17に直結されている廃熱ボイラ1
5に流入し、ここで更に熱回収される。The combustion gas G 2 generated in the melting furnace 7 flows at 900 ° C. to 950 ° C. at the inlet (lower part) of the first flue 4,
The heat is exchanged in the air heater 5 and the temperature rises to about 800 ° C.
Combustion gas G 2 which has flowed into the flue 17 of the flue gas and has been absorbed by the water-cooling wall around the flue gas to lower the temperature to 600 ° C to 650 ° C
And the waste heat boiler 1 directly connected to the second flue 17
5 into which additional heat is recovered.
【0013】第1の煙道4及び第2の煙道17の各水冷
壁に用いられる冷却水はボイラ水が用いられ、各水冷壁
と廃熱ボイラ15の蒸気ドラム15aとは給水管18に
より連結されて燃焼ガスG2 の持つ熱を効率的に回収す
るようになっている。そしてこのようにして第1の煙道
4内に設置されている空気加熱器5及び、前記第1の煙
道4と第2の煙道17を介して接続されている廃熱ボイ
ラ15により熱回収された燃焼ガスG2 は、比較的低温
となって集塵装置19で除塵され、更に洗浄装置20で
洗浄されて低温のクリーンな排ガスG3 となって煙突2
1から大気に放出されるのである。一方、前記廃熱ボイ
ラ15で得られた蒸気Sは蒸気タービンと発電機からな
る発電設備23で発電され、電力として回収される。Boiler water is used as the cooling water used for each water cooling wall of the first flue 4 and the second flue 17, and each water cooling wall and the steam drum 15a of the waste heat boiler 15 are connected by a water supply pipe 18. The heat of the combustion gas G 2 is connected and is efficiently recovered. In this way, heat is generated by the air heater 5 installed in the first flue 4 and the waste heat boiler 15 connected through the first flue 4 and the second flue 17. The recovered combustion gas G 2 has a relatively low temperature, is dust-removed by the dust collector 19, and is further cleaned by the cleaning device 20 to become a low-temperature clean exhaust gas G 3 and the stack 2
1 is released into the atmosphere. On the other hand, the steam S obtained in the waste heat boiler 15 is generated by a power generation facility 23 including a steam turbine and a generator and is recovered as electric power.
【0014】[0014]
【発明の効果】以上の説明から明らかなように本発明に
よる廃棄物処理装置における排熱回収部構造によれば、
溶融炉から排出される燃焼ガスを、空気加熱器及び廃熱
ボイラで熱回収する場合において、空気加熱器を配置し
た第1の煙道と後流側に廃熱ボイラを有する第2の煙道
とを、煙道で直結したため、特別の排気管を必要としな
くなり、空気加熱器と廃熱ボイラとを接近して配置でき
るために装置全体がコンパクトになった。そのため装置
の据付面積を抑制することができる。As is clear from the above description, according to the exhaust heat recovery part structure in the waste treatment apparatus of the present invention,
In the case of recovering the heat of the combustion gas discharged from the melting furnace by the air heater and the waste heat boiler, the first flue having the air heater and the second flue having the waste heat boiler on the downstream side. Since it was directly connected with the flue, no special exhaust pipe was required, and the air heater and the waste heat boiler can be arranged close to each other, so that the entire apparatus was made compact. Therefore, the installation area of the device can be suppressed.
【図1】本発明による排熱回収部構造を用いた廃棄物処
理装置の系統図である。FIG. 1 is a system diagram of a waste treatment device using an exhaust heat recovery unit structure according to the present invention.
【図2】図1のA部拡大図である。FIG. 2 is an enlarged view of a portion A in FIG.
1 熱分解反応器 2 誘引送風機 3 投入口 4 第1の煙道 5 空気加熱器 6 排出装置 7 溶融炉 8 バーナ 9 冷却装置 10 分離装置 11 コンテナ 12 粉砕機 13 押込送風機 14 水槽 15 廃熱ボイラ 16 耐火材 17 第2の煙道 18 給水管 19 集塵装置 20 洗浄装置 21 煙突 23 発電設備 1 Pyrolysis Reactor 2 Induction Blower 3 Input Port 4 First Flue 5 Air Heater 6 Ejector 7 Melting Furnace 8 Burner 9 Cooling Device 10 Separator 11 Container 12 Crusher 13 Forced Blower 14 Water Tank 15 Waste Heat Boiler 16 Refractory material 17 Second flue 18 Water supply pipe 19 Dust collector 20 Cleaning device 21 Chimney 23 Power generation facility
Claims (2)
器に投入し、該廃棄物を加熱して熱分解し、乾留ガスと
主として不揮発性成分よりなる熱分解残留物とよりなる
熱分解生成物を生成し、熱分解残留物から分離された燃
焼性成分と前記乾留ガスとを燃焼器で燃焼処理させると
ともに、該燃焼器で発生する燃焼ガスを空気加熱器及び
廃熱ボイラに供給して排熱回収するようにした廃棄物処
理装置において、 前記空気加熱器を、前記燃焼器に連なり、かつ水冷壁よ
り構成される第1の煙道内に配置し、該第1の煙道を水
冷壁よりなる第2の煙道を介して前記廃熱ボイラに連通
させるとともに、前記第1の煙道を構成する後壁が前記
第2の煙道を構成する前壁となるよう構成したことを特
徴とする廃棄物処理装置における排熱回収部構造。1. A heat treatment method in which a waste is put into a pyrolysis reactor whose internal pressure is lower than atmospheric pressure, the waste is heated to be pyrolyzed, and which is composed of a dry distillation gas and a pyrolysis residue mainly composed of non-volatile components. A decomposition product is generated, the combustible component separated from the thermal decomposition residue and the dry distillation gas are burnt in a combustor, and the combustion gas generated in the combustor is supplied to an air heater and a waste heat boiler. In the waste treatment device configured to recover the exhaust heat, the air heater is arranged in a first flue that is connected to the combustor and includes a water cooling wall, and the first flue is connected to the first flue. The waste heat boiler is connected to the waste heat boiler via a second flue that is a water-cooling wall, and the rear wall that constitutes the first flue is a front wall that constitutes the second flue. An exhaust heat recovery unit structure in a waste treatment device.
1記載の第1の煙道。2. The first flue according to claim 1, wherein a refractory material is stretched in the water cooling wall.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7910596A JPH09273724A (en) | 1996-04-01 | 1996-04-01 | Structure of exhaust heat recovery part for waste treating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7910596A JPH09273724A (en) | 1996-04-01 | 1996-04-01 | Structure of exhaust heat recovery part for waste treating device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09273724A true JPH09273724A (en) | 1997-10-21 |
Family
ID=13680623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7910596A Withdrawn JPH09273724A (en) | 1996-04-01 | 1996-04-01 | Structure of exhaust heat recovery part for waste treating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09273724A (en) |
-
1996
- 1996-04-01 JP JP7910596A patent/JPH09273724A/en not_active Withdrawn
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