JPH06174223A - Apparatus for decomposition of ash by heating - Google Patents
Apparatus for decomposition of ash by heatingInfo
- Publication number
- JPH06174223A JPH06174223A JP4325854A JP32585492A JPH06174223A JP H06174223 A JPH06174223 A JP H06174223A JP 4325854 A JP4325854 A JP 4325854A JP 32585492 A JP32585492 A JP 32585492A JP H06174223 A JPH06174223 A JP H06174223A
- Authority
- JP
- Japan
- Prior art keywords
- ash
- gas
- heating
- heavy metal
- heavy metals
- 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
Landscapes
- Gasification And Melting Of Waste (AREA)
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、都市ごみや産業廃棄物
などを焼却処理する際に発生する焼却灰に含まれるダイ
オキシン類などの有害な物質を取り除く灰加熱分解装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ash heat decomposition apparatus for removing harmful substances such as dioxins contained in incinerated ash generated when incinerating municipal waste or industrial waste.
【０００２】[0002]
【従来の技術】図４は従来の灰加熱分解装置の概略構成
図である。図４において、ダイオキシン類などの有害物
質を含有する飛灰を捕集する灰ホッパ１の取出口は供給
管２を介してバルブ３に連結され、バルブ３は供給管４
を介して灰加熱装置５の投入口に連結されている。この
灰加熱装置５内部の長手方向には、投入された飛灰を排
出口に送るスクリューコンベア（図示せず）が設けら
れ、また、灰加熱装置５の長手方向外部には駆動モータ
６が設置されており、この駆動モータ６はスクリューコ
ンベアの回動軸７に連結されている。また、灰加熱装置
５の排出口は移送管８を介して灰冷却装置９の投入口に
接続されている。この灰冷却装置９内部の長手方向に
は、加熱処理された飛灰を排出口に送るスクリューコン
ベア（図示せず）が設けられ、また、灰冷却装置９の長
手方向外部には駆動モータ10が設置されており、この駆
動モータ10はスクリューコンベアの回動軸11に連結され
ている。この灰冷却装置９の排出口は、飛灰を蓄える灰
バンカ12の開口部に開口する供給管13に連結されてお
り、この供給管13にはバルブ14が設けられている。2. Description of the Related Art FIG. 4 is a schematic configuration diagram of a conventional ash heat decomposition apparatus. In FIG. 4, the outlet of an ash hopper 1 for collecting fly ash containing harmful substances such as dioxins is connected to a valve 3 via a supply pipe 2, and the valve 3 is connected to the supply pipe 4.
It is connected to the charging port of the ash heating device 5 via. A screw conveyor (not shown) that feeds the fly ash that has been input to the discharge port is provided in the longitudinal direction inside the ash heating device 5, and a drive motor 6 is provided outside the ash heating device 5 in the longitudinal direction. The drive motor 6 is connected to the rotating shaft 7 of the screw conveyor. The discharge port of the ash heating device 5 is connected to the input port of the ash cooling device 9 via the transfer pipe 8. A screw conveyor (not shown) for sending the heat-treated fly ash to the discharge port is provided in the longitudinal direction inside the ash cooling device 9, and a drive motor 10 is provided outside the ash cooling device 9 in the longitudinal direction. It is installed and this drive motor 10 is connected to the rotating shaft 11 of the screw conveyor. The outlet of the ash cooling device 9 is connected to a supply pipe 13 that opens at an opening of an ash bunker 12 that stores fly ash, and the supply pipe 13 is provided with a valve 14.
【０００３】上記構成により、まず、灰ホッパ１で捕集
された、ダイオキシン類などの有害物質を含有する飛灰
は、バルブ３で調整されながら灰加熱装置５の投入口に
送られる。そして、灰加熱装置５で飛灰は酸素不足下で
300 ℃以上の高温状態を30分以上保持され、これによ
り、飛灰に化学的、物理的に吸着した水分や、ダイオキ
シン類などの有害物質を熱ガスとして気相中に蒸発、揮
散させ、熱分解処理される。このようにして熱分解処理
されながら、灰加熱装置５内をスクリューコンベアで排
出口に送られた飛灰は、熱ガスとともに灰冷却装置９で
冷却された後、灰冷却装置９の排出口から排出されて灰
バンカ12内に蓄えられる。With the above construction, first, fly ash containing harmful substances such as dioxins collected by the ash hopper 1 is sent to the charging port of the ash heating device 5 while being adjusted by the valve 3. And in the ash heating device 5, the fly ash is under oxygen deficiency
It is kept at a high temperature of 300 ° C or higher for 30 minutes or more, which allows the moisture, chemically and physically adsorbed by fly ash, and harmful substances such as dioxins to evaporate and volatilize into the gas phase as hot gas, It is disassembled. The fly ash sent to the discharge port by the screw conveyor in the ash heating device 5 while being pyrolyzed in this way is cooled by the ash cooling device 9 together with the hot gas, and then discharged from the discharge port of the ash cooling device 9. It is discharged and stored in the ash bunker 12.
【０００４】このように、ごみ焼却プラントの飛灰捕集
装置で捕集されたダイオキシン類などの有害物質を含有
する飛灰を、酸素不足下で300 ℃以上の高温状態を30分
以上の長時間保持することにより、ダイオキシン類など
の有害物質を熱分解処理して飛灰から除去し飛灰を無害
化していた。As described above, the fly ash containing harmful substances such as dioxins collected by the fly ash collector of the refuse incineration plant is kept at a high temperature of 300 ° C. or higher for 30 minutes or more under oxygen deficiency. By holding for a period of time, harmful substances such as dioxins were thermally decomposed and removed from the fly ash to render the fly ash harmless.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記従来の構
成では、灰ホッパ１から飛灰と随伴したガスと灰加熱装
置５で蒸発、揮散したガスとが熱ガスとなって灰冷却装
置９を通過する際、灰加熱装置５で蒸発した低融点の凝
縮性物質、特に重金属の固着、凝縮による固着トラブ
ル、すなわち、被処理物である飛灰の連続移送ができな
くなるという問題を有していた。また、灰加熱装置５で
蒸発、揮散したダイオキシン類などの有害物質を含む熱
ガスの一部も少量とはいえ未分解のまま灰冷却装置９を
通過して大気中に出るという問題を有していた。However, in the above-mentioned conventional configuration, the gas accompanying fly ash from the ash hopper 1 and the gas evaporated and volatilized by the ash heating device 5 become hot gas and the ash cooling device 9 is used. When passing through, there was a problem that the low melting point condensable substance evaporated in the ash heating device 5, especially heavy metal, was fixed or fixed due to condensation, that is, the fly ash as the object to be processed could not be continuously transferred. . Also, there is a problem that a part of the hot gas containing harmful substances such as dioxins evaporated and volatilized by the ash heating device 5 passes through the ash cooling device 9 into the atmosphere without being decomposed even though it is a small amount. Was there.
【０００６】本発明は上記従来の問題を解決するもの
で、灰冷却装置における重金属の凝縮による固着トラブ
ルを防ぐとともに、ダイオキシン類などの有害物質を含
むガスの大気中への放出を防止することができる灰加熱
分解装置を提供することを目的とするものである。The present invention solves the above-mentioned conventional problems, and prevents the adhesion trouble due to the condensation of heavy metals in an ash cooling device, and prevents the release of gases containing harmful substances such as dioxins into the atmosphere. An object of the present invention is to provide an ash heat decomposition apparatus that can be used.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に本発明の灰加熱分解装置は、有害物質を含有する灰を
加熱処理する加熱手段と、前記加熱手段で加熱処理した
灰を冷却する冷却手段とを有する灰加熱分解装置におい
て、前記加熱手段の加熱処理で蒸発させた有害物質を含
むガスを沈澱処理して有害物質を取り除く沈澱手段と、
前記加熱手段の加熱処理で蒸発させた有害物質を含むガ
スを吸引して前記沈澱手段に導く吸引手段とを備え、前
記加熱手段の加熱処理で蒸発させた有害物質を含むガス
を前記沈澱手段と加熱手段の間を循環させる構成とした
ものである。In order to solve the above problems, the ash heat decomposition apparatus of the present invention comprises a heating means for heat-treating ash containing a harmful substance, and cooling the ash heat-treated by said heating means. In an ash heating decomposition apparatus having a cooling means, a precipitation means for removing a harmful substance by subjecting a gas containing the harmful substance evaporated in the heat treatment of the heating means to a precipitation treatment,
A suction means for sucking the gas containing the harmful substance vaporized by the heating treatment of the heating means and guiding it to the precipitation means, and the gas containing the harmful substance vaporized by the heating treatment of the heating means for the precipitation means. It is configured to circulate between heating means.
【０００８】[0008]
【作用】上記構成により、有害物質を含有する灰は加熱
手段で加熱処理され、この加熱手段で蒸発した有害物質
を含むガスを吸引手段で吸引し、沈澱手段で有害物質を
含むガスから有害物質を取り除くので、加熱処理された
灰を冷却手段で冷却するに際して、従来のような低融点
重金属の固着、凝縮による固着トラブルは防止され、ま
た、加熱手段の加熱処理で蒸発させた有害物質を含むガ
スを沈澱手段と加熱手段の間を循環させるので、一部未
分解の熱ガスも何れ熱分解されて、従来のように冷却後
に未分解のまま大気中に放出されるようなことはなくな
る。With the above construction, the ash containing the harmful substance is heat-treated by the heating means, the gas containing the harmful substance vaporized by the heating means is sucked by the suction means, and the harmful substance is removed from the gas containing the harmful substance by the precipitation means. Therefore, when the heat-treated ash is cooled by the cooling means, the conventional fixing trouble of the low melting point heavy metal and the sticking trouble due to condensation are prevented, and the ash containing the harmful substance evaporated by the heat treatment of the heating means is included. Since the gas is circulated between the precipitation means and the heating means, a part of the undecomposed hot gas will not be thermally decomposed and will not be released into the atmosphere in the undecomposed state after cooling as in the conventional case.
【０００９】[0009]
【実施例】以下、本発明の実施例について図面を参照し
ながら説明する。なお、従来例と同一の作用効果を奏す
るものには同一の符号を付してその説明を省略する。Embodiments of the present invention will be described below with reference to the drawings. It should be noted that components having the same effects as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.
【００１０】図１は本発明の第１の実施例における灰加
熱分解装置の概略構成図である。図１において、灰加熱
装置５の排出口の上方に設けられた取出口は吸気管21を
介してフィルタ22の流入側に連結され、このフィルタ22
の流出側は吸気管23を介してガス冷却器24の流入側に連
結され、このガス冷却器24の流出側は吸気管25を介して
ガス循環ポンプ26の流入側に連結され、このガス循環ポ
ンプ26の流出側は吸気管27の一端に連結され、その他端
は重金属沈澱槽28の沈澱液中に開口している。この重金
属沈澱槽28の沈澱液にはキレート液が加えられ、水銀な
どの低融点重金属などの有害物質を沈澱させる。FIG. 1 is a schematic configuration diagram of an ash heating decomposition apparatus according to a first embodiment of the present invention. In FIG. 1, the outlet provided above the outlet of the ash heating device 5 is connected to the inflow side of the filter 22 via the intake pipe 21.
The outflow side of the gas cooler 24 is connected to the inflow side of the gas cooler 24 via the intake pipe 23, and the outflow side of the gas cooler 24 is connected to the inflow side of the gas circulation pump 26 via the intake pipe 25. The outflow side of the pump 26 is connected to one end of the intake pipe 27, and the other end is opened into the precipitation liquid of the heavy metal precipitation tank 28. A chelating solution is added to the precipitation liquid in the heavy metal precipitation tank 28 to precipitate harmful substances such as low melting point heavy metals such as mercury.
【００１１】また、一端が重金属沈澱槽28の沈澱液面上
に開口するフィードバック用の配管29は、供給管４と供
給管13に連結されるとともに、圧力逃がし弁であるコン
トロール弁30を介して外部に開口している。このコント
ロール弁30とフィードバック用配管29の間には圧力検出
器30ａが介装されている。A feedback pipe 29, one end of which opens on the surface of the precipitation liquid of the heavy metal precipitation tank 28, is connected to the supply pipe 4 and the supply pipe 13 and via a control valve 30 which is a pressure relief valve. It is open to the outside. A pressure detector 30a is interposed between the control valve 30 and the feedback pipe 29.
【００１２】上記構成により、飛灰は灰加熱装置５で酸
素不足下で400 ℃以上の高温状態を30分以上保持され、
これで、飛灰に化学的、物理的に吸着した水分や、水銀
などの低融点重金属、さらにはダイオキシン類などの有
害物質が熱ガスとして気相中に蒸発、揮散し、熱分解処
理される。そして、飛灰は灰冷却装置９において140℃
以下の温度で冷却される。With the above construction, the fly ash is kept in the ash heating device 5 at a high temperature of 400 ° C. or higher for 30 minutes or more under oxygen deficiency,
Moisture chemically and physically adsorbed by fly ash, low-melting heavy metals such as mercury, and harmful substances such as dioxins evaporate and volatilize into the gas phase as hot gas, and are pyrolyzed. . And the fly ash is 140 ° C. in the ash cooler 9.
It is cooled at the following temperature.
【００１３】ここで、灰加熱装置５で蒸発、揮散した水
銀などの低融点重金属やダイオキシン類などの有害物質
を含む熱ガスの大半は、ガス循環ポンプ26で灰加熱装置
５の取出口から吸引され、まず、フィルタ22で塵などが
取り除かれ、そして、ガス冷却器24を通過して冷却さ
れ、さらに、重金属沈澱槽28に導かれて沈澱処理され水
分および重金属が除去される。このように、ガス循環ポ
ンプ26で吸引することにより、灰冷却装置９への熱ガス
の移行が抑制され、重金属の固着、凝縮による灰冷却装
置９の固着トラブルは防止される。また、ダイオキシン
類などの有害物質を含むガスは常時、重金属沈澱槽28か
らフィードバック用配管29さらに灰加熱装置５を通して
循環しており、ごく一部が未分解のまま残っていても何
れ熱分解され、従来のように一部が未分解のまま灰冷却
装置９を通過して大気中に放出されるようなことはな
い。さらに、フィードバック用配管29は供給管13にも連
結されており、重金属沈澱槽28からフィードバックされ
るガスが灰冷却装置９を介して灰加熱装置５に循環する
ようにしているので、飛灰と随伴して灰冷却装置９に至
った重金属やダイオキシン類などの有害物質は灰加熱装
置５に戻されてガス処理を確実なものとしている。Here, most of the hot gases containing low melting point heavy metals such as mercury and harmful substances such as dioxins evaporated and volatilized by the ash heating device 5 are sucked from the outlet of the ash heating device 5 by the gas circulation pump 26. First, the filter 22 removes dust and the like, and then passes through the gas cooler 24 to be cooled, and is further guided to the heavy metal precipitation tank 28 for precipitation treatment to remove water and heavy metals. In this way, by sucking with the gas circulation pump 26, transfer of hot gas to the ash cooling device 9 is suppressed, and sticking troubles of the ash cooling device 9 due to sticking and condensation of heavy metals are prevented. In addition, the gas containing harmful substances such as dioxins is constantly circulated from the heavy metal precipitation tank 28 through the feedback pipe 29 and the ash heating device 5, and even if only a small portion remains undecomposed, it is thermally decomposed eventually. However, unlike the conventional case, it is not released into the atmosphere by passing through the ash cooling device 9 in a partially undecomposed state. Further, the feedback pipe 29 is also connected to the supply pipe 13 so that the gas fed back from the heavy metal precipitation tank 28 circulates to the ash heating device 5 via the ash cooling device 9, so that fly ash is generated. Hazardous substances such as heavy metals and dioxins that have accompanied the ash cooling device 9 are returned to the ash heating device 5 to ensure gas treatment.
【００１４】また、重金属沈澱槽28の液面上の圧力が異
常上昇した場合、重金属沈澱槽28の圧力を圧力検出器30
ａで検出してコントロール弁30を作動させて外部に逃が
し、重金属沈澱槽28内の圧力の異常上昇を防止する。When the pressure on the liquid surface of the heavy metal precipitation tank 28 rises abnormally, the pressure of the heavy metal precipitation tank 28 is detected by the pressure detector 30.
It is detected by a and the control valve 30 is operated to release it to the outside to prevent an abnormal rise in the pressure in the heavy metal precipitation tank 28.
【００１５】図２は本発明の第２の実施例における灰加
熱分解装置の構成図であり、第１の実施例と同一の作用
効果を奏するものには同一の符号を付してその説明を省
略する。図２において、灰加熱装置５の排出口と灰冷却
装置９の投入口を連結している移送管31にはガスシール
用のロータリバルブ32が設けられている。このロータリ
バルブ32の流入側の移送管31には吸気管33を介してフィ
ルタ34の流入側が連結され、このフィルタ34の流出側は
吸気管35を介してガス冷却器36の流入側に連結され、さ
らに、ガス冷却器36の流出側は吸気管37を介してガス循
環ポンプ26の流入側に連結されている。また、ロータリ
バルブ32の流出側の移送管31には吸気管38を介してフィ
ルタ39の流入側が連結され、このフィルタ39の流出側は
吸気管40を介してガス冷却器41の流入側が連結され、さ
らに、ガス冷却器41の流出側は吸気管42を介して吸気管
37に連結され、この吸気管37を介してガス循環ポンプ26
の流入側に連結されている。FIG. 2 is a block diagram of an ash heating decomposition apparatus according to a second embodiment of the present invention, in which the components having the same effects as those of the first embodiment are designated by the same reference numerals and their description is omitted. Omit it. In FIG. 2, the transfer pipe 31 connecting the outlet of the ash heating device 5 and the inlet of the ash cooling device 9 is provided with a rotary valve 32 for gas sealing. The inflow side of the rotary valve 32 is connected to the inflow side of the filter 34 via the intake pipe 33, and the outflow side of the filter 34 is connected to the inflow side of the gas cooler 36 via the intake pipe 35. Further, the outflow side of the gas cooler 36 is connected to the inflow side of the gas circulation pump 26 via an intake pipe 37. The transfer pipe 31 on the outflow side of the rotary valve 32 is connected to an inflow side of a filter 39 via an intake pipe 38, and the outflow side of the filter 39 is connected to an inflow side of a gas cooler 41 via an intake pipe 40. Furthermore, the outflow side of the gas cooler 41 is connected to the intake pipe via the intake pipe 42.
A gas circulation pump 26 connected to the gas intake pipe 37 via this intake pipe 37.
Is connected to the inflow side of.
【００１６】上記構成により、ロータリバルブ32を閉じ
れば、灰加熱装置５で蒸発、揮散した水銀などの低融点
重金属やダイオキシン類などの有害物質を含む熱ガスは
全て、ガス循環ポンプ26で灰加熱装置５の排出口から吸
引され、まず、フィルタ34で塵などが取り除かれた後、
ガス冷却器36を通過して冷却され、さらに、重金属沈澱
槽28に導かれる。これと同時に、灰冷却装置９内のガス
も灰冷却装置９の投入口から吸引され、まず、フィルタ
39で塵などが取り除かれた後、ガス冷却器41を通過して
冷却され、さらに、重金属沈澱槽28に導かれる。これに
より、熱ガス処理が確実性を高め、熱ガスによるトラブ
ルの可能性がさらに減少する。With the above construction, when the rotary valve 32 is closed, all the hot gases containing low-melting heavy metals such as mercury vaporized and volatilized by the ash heating device 5 and harmful substances such as dioxins are heated by the gas circulation pump 26. After being sucked from the outlet of the device 5 and first of all dusts are removed by the filter 34,
It is cooled by passing through the gas cooler 36, and is further guided to the heavy metal precipitation tank 28. At the same time, the gas in the ash cooling device 9 is also sucked from the charging port of the ash cooling device 9, and first, the filter
After dust and the like are removed at 39, the gas is passed through the gas cooler 41 to be cooled, and further guided to the heavy metal precipitation tank 28. This increases the reliability of the hot gas treatment and further reduces the possibility of trouble with the hot gas.
【００１７】図３は本発明の第３の実施例における灰加
熱分解装置の構成図であり、第１の実施例と同一の作用
効果を奏するものには同一の符号を付してその説明を省
略する。図３において、灰加熱装置５の取出口とフィル
タ22の間に、圧力異常防止用のコントロール弁51が介装
され、また、このコントロール弁51と灰加熱装置５の間
に圧力検出器51ａが介装されている。また、一端が重金
属沈澱槽28の沈澱液面上に開口するフィードバック用配
管52は、焼却炉からの排ガスを移送する移送管53に連結
され、この移送管53はバグフィルタ54の流入側に連結さ
れ、また、バグフィルタ54の流出側に一端が連結される
排ガス移送管55の他端は煙突に連結されている。さら
に、このバグフィルタ54の流入側は灰ホッパ１に連通し
ている。FIG. 3 is a block diagram of an ash heating decomposition apparatus according to a third embodiment of the present invention. Components having the same effects as those of the first embodiment are designated by the same reference numerals and their description will be given. Omit it. In FIG. 3, a control valve 51 for preventing abnormal pressure is provided between the outlet of the ash heating device 5 and the filter 22, and a pressure detector 51a is provided between the control valve 51 and the ash heating device 5. It is installed. Further, a feedback pipe 52 having one end opened above the precipitation liquid surface of the heavy metal precipitation tank 28 is connected to a transfer pipe 53 for transferring the exhaust gas from the incinerator, and the transfer pipe 53 is connected to the inflow side of the bag filter 54. Further, the other end of the exhaust gas transfer pipe 55 whose one end is connected to the outflow side of the bag filter 54 is connected to the chimney. Further, the inflow side of the bag filter 54 communicates with the ash hopper 1.
【００１８】上記構成により、灰加熱装置５で蒸発、揮
散した水銀などの低融点重金属やダイオキシン類などの
有害物質を含む熱ガスの大半は、ガス循環ポンプ26によ
り重金属沈澱槽28に導かれて、水銀などの低融点重金属
などの有害物質を含む熱ガスは沈澱液で水分および重金
属が除去されるが、ごく一部が未分解のダイオキシン類
などの有害物質を含む熱ガスは常時、重金属沈澱槽28か
らフィードバック用配管52、移送管53、バグフィルタ5
4、灰ホッパ１さらに灰加熱装置５を通して一部が循環
しており、何れ熱分解される。With the above structure, most of the hot gas containing low melting point heavy metals such as mercury and harmful substances such as dioxins evaporated and volatilized by the ash heating device 5 is introduced into the heavy metal precipitation tank 28 by the gas circulation pump 26. Water and heavy metals containing harmful substances such as mercury and low melting point heavy metals are removed by the precipitation liquid, but hot gases containing harmful substances such as dioxins, which are not partially decomposed, are always precipitated by heavy metal precipitation. Feedback pipe 52 from tank 28, transfer pipe 53, bag filter 5
4. The ash hopper 1 and a part of it are circulated through the ash heating device 5, and are thermally decomposed eventually.
【００１９】また、灰加熱装置５の急激な加熱または飛
灰とともに持ち込まれたガスによるガス圧力の異常上昇
を圧力検出器51ａで検出してコントロール弁51をさらに
開くことにより、灰加熱装置５内の圧力異常上昇トラブ
ルが回避される。また、ガス循環ポンプ26の吸引により
灰加熱装置５内が真空度が高くなった場合にも、灰加熱
装置５内の圧力を圧力検出器51ａで検出してコントロー
ル弁51を閉じることにより、灰加熱装置５内の異常減圧
トラブルも回避される。Further, the pressure detector 51a detects an abnormal increase in the gas pressure due to the gas brought in together with the rapid heating of the ash heating device 5 or the fly ash, and the control valve 51 is further opened. The abnormal pressure rise trouble can be avoided. Further, even when the vacuum degree inside the ash heating device 5 becomes high due to the suction of the gas circulation pump 26, the pressure inside the ash heating device 5 is detected by the pressure detector 51a and the control valve 51 is closed, Abnormal decompression troubles in the heating device 5 are also avoided.
【００２０】したがって、以上の第１〜第３の実施例に
よれば、灰加熱装置５内の熱ガスをガス循環ポンプ26に
より吸引して重金属沈澱槽28に導き、重金属沈澱槽28で
水分および重金属を除去するため、凝縮水などによる固
結、重金属類の固着などによる灰冷却装置９の閉塞が抑
制されて、灰冷却装置９において飛灰の安定した連続移
送が可能となり、灰加熱分解装置における連続運転の向
上を図ることができる。また、揮散したダイオキシン類
を含むガスは常時、重金属沈澱槽28からフィードバック
用配管29またはフィードバック用配管52を介して灰加熱
装置５に循環しており、未分解のまま残っている分も何
れ熱分解され、従来のように灰冷却装置９を経て一部が
未分解のまま大気中へ排出されるようなことはなくな
る。さらに、ガス循環系にコントロール弁30，51を設け
ることにより、急激なガス圧力の異常トラブルを避ける
ことができる。Therefore, according to the above-described first to third embodiments, the hot gas in the ash heating device 5 is sucked by the gas circulation pump 26 and guided to the heavy metal precipitation tank 28, and the heavy metal precipitation tank 28 contains water and moisture. Since the heavy metals are removed, the ash cooling device 9 is prevented from being clogged due to solidification due to condensed water or the like, and the adhesion of heavy metals, and the ash cooling device 9 enables stable and continuous transfer of fly ash. It is possible to improve continuous operation in. Further, the gas containing the volatilized dioxins is constantly circulated from the heavy metal precipitation tank 28 to the ash heating device 5 via the feedback pipe 29 or the feedback pipe 52, and any amount of the remaining undecomposed remains a heat. It will not be decomposed and partially discharged into the atmosphere through the ash cooling device 9 as it is in the past, without being decomposed. Further, by providing the control valves 30 and 51 in the gas circulation system, it is possible to avoid sudden troubles of abnormal gas pressure.
【００２１】[0021]
【発明の効果】以上のように本発明によれば、加熱処理
で蒸発した有害物質を含むガスを吸引手段で吸引して沈
澱手段で有害物質を取り除くため、従来のように、水分
や重金属の固着、凝縮による冷却手段の固着トラブルを
防止することができるものである。また、有害物質を含
む熱ガスは常時、加熱手段を通して循環させるため、従
来のように冷却後に未分解のまま大気中に放出されるの
を防止することができるものである。As described above, according to the present invention, the gas containing the harmful substance evaporated in the heat treatment is sucked by the suction means and the harmful substance is removed by the precipitation means. It is possible to prevent the trouble of sticking of the cooling means due to sticking and condensation. Further, since the hot gas containing the harmful substance is constantly circulated through the heating means, it is possible to prevent the gas from being released into the atmosphere in an undecomposed state after cooling as in the conventional case.
【図１】本発明の第１の実施例における灰加熱分解装置
の概略構成図である。FIG. 1 is a schematic configuration diagram of an ash heat decomposition apparatus according to a first embodiment of the present invention.
【図２】本発明の第２の実施例における灰加熱分解装置
の概略構成図である。FIG. 2 is a schematic configuration diagram of an ash heat decomposition apparatus according to a second embodiment of the present invention.
【図３】本発明の第３の実施例における灰加熱分解装置
の概略構成図である。FIG. 3 is a schematic configuration diagram of an ash heat decomposition apparatus according to a third embodiment of the present invention.
【図４】従来の灰加熱分解装置の概略構成図である。FIG. 4 is a schematic configuration diagram of a conventional ash heat decomposition apparatus.
５ 灰加熱装置 ９ 灰冷却装置 21，23，25，27，33，35，37，38，40，42 吸気管 26 ガス循環ポンプ 28 重金属沈澱槽 29，52 フィードバック用配管 5 Ash heating device 9 Ash cooling device 21, 23, 25, 27, 33, 35, 37, 38, 40, 42 Intake pipe 26 Gas circulation pump 28 Heavy metal precipitation tank 29, 52 Feedback pipe
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長井 健一 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 古寺 雅晴 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 安田 俊彦 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 東條 千明 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 井上 司朗 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Nagai 5-3 28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Inventor Masaharu Kodera, Nishikujo 5-chome, Konohana-ku, Osaka City, Osaka Prefecture 3-28 Hitachi Shipbuilding Co., Ltd. (72) Inventor Toshihiko Yasuda 5-3-8 Nishikujo, Konohana-ku, Osaka-shi, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Chiaki Tojo Nishikujo, Konohana-ku, Osaka-shi, Osaka Prefecture 5-328 Hitachi Shipbuilding Co., Ltd. (72) Inventor Shiro Inoue 5-3-28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd.
Claims (1)
手段と、前記加熱手段で加熱処理した灰を冷却する冷却
手段とを有する灰加熱分解装置において、前記加熱手段
の加熱処理で蒸発させた有害物質を含むガスを沈澱処理
して有害物質を取り除く沈澱手段と、前記加熱手段の加
熱処理で蒸発させた有害物質を含むガスを吸引して前記
沈澱手段に導く吸引手段とを備え、前記加熱手段の加熱
処理で蒸発させた有害物質を含むガスを前記沈澱手段と
加熱手段の間を循環させる構成とした灰加熱分解装置。1. An ash thermal decomposition apparatus comprising: a heating means for heat-treating ash containing a harmful substance; and a cooling means for cooling the ash heat-treated by the heating means. A precipitation means for removing a harmful substance by precipitating a gas containing the harmful substance; and a suction means for sucking the gas containing the harmful substance evaporated by the heating treatment of the heating means and guiding the gas to the precipitation means, An ash heating decomposition apparatus configured to circulate a gas containing a harmful substance evaporated by the heating process of the heating means between the precipitation means and the heating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4325854A JP2953889B2 (en) | 1992-12-07 | 1992-12-07 | Ash pyrolysis equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4325854A JP2953889B2 (en) | 1992-12-07 | 1992-12-07 | Ash pyrolysis equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06174223A true JPH06174223A (en) | 1994-06-24 |
| JP2953889B2 JP2953889B2 (en) | 1999-09-27 |
Family
ID=18181365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4325854A Expired - Lifetime JP2953889B2 (en) | 1992-12-07 | 1992-12-07 | Ash pyrolysis equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2953889B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07108249A (en) * | 1993-10-12 | 1995-04-25 | Kawasaki Heavy Ind Ltd | Process and device for treating ash containing dioxin and mercury |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6179907A (en) * | 1984-09-25 | 1986-04-23 | Daido Steel Co Ltd | Waste material processing method |
| JPH03196887A (en) * | 1989-12-26 | 1991-08-28 | Takuma Co Ltd | Ash treating device in refuse incinerator |
| JPH03267186A (en) * | 1990-03-14 | 1991-11-28 | Takuma Co Ltd | Electric heating type ash treatment apparatus |
| JPH04350407A (en) * | 1991-05-28 | 1992-12-04 | Hitachi Zosen Corp | Method of dioxin generation restriction in dust incineration |
-
1992
- 1992-12-07 JP JP4325854A patent/JP2953889B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6179907A (en) * | 1984-09-25 | 1986-04-23 | Daido Steel Co Ltd | Waste material processing method |
| JPH03196887A (en) * | 1989-12-26 | 1991-08-28 | Takuma Co Ltd | Ash treating device in refuse incinerator |
| JPH03267186A (en) * | 1990-03-14 | 1991-11-28 | Takuma Co Ltd | Electric heating type ash treatment apparatus |
| JPH04350407A (en) * | 1991-05-28 | 1992-12-04 | Hitachi Zosen Corp | Method of dioxin generation restriction in dust incineration |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07108249A (en) * | 1993-10-12 | 1995-04-25 | Kawasaki Heavy Ind Ltd | Process and device for treating ash containing dioxin and mercury |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2953889B2 (en) | 1999-09-27 |
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