JP3552308B2 - Method and apparatus for indirect melting of incinerated ash - Google Patents

Method and apparatus for indirect melting of incinerated ash Download PDF

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Publication number
JP3552308B2
JP3552308B2 JP27788994A JP27788994A JP3552308B2 JP 3552308 B2 JP3552308 B2 JP 3552308B2 JP 27788994 A JP27788994 A JP 27788994A JP 27788994 A JP27788994 A JP 27788994A JP 3552308 B2 JP3552308 B2 JP 3552308B2
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JP
Japan
Prior art keywords
ash
melting chamber
indirect
melting
heat storage
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.)
Expired - Fee Related
Application number
JP27788994A
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Japanese (ja)
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JPH08135936A (en
Inventor
一郎 仲町
一史 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
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 Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP27788994A priority Critical patent/JP3552308B2/en
Publication of JPH08135936A publication Critical patent/JPH08135936A/en
Application granted granted Critical
Publication of JP3552308B2 publication Critical patent/JP3552308B2/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Description

【0001】
【産業上の利用分野】
本発明は、焼却灰の間接溶融方法及び装置に関するものである。
【0002】
【従来の技術】
焼却灰等の成分中には揮発成分が含まれており、これは高温で発泡するため、ガス抜きをする必要がある。従来は、バーナにより焼却灰の表面から順次溶融して行く方法であり、この方法を実行するための装置として、傾斜反射炉、旋回溶融炉、電気溶融炉等の種々のものがある。
【0003】
【発明が解決しようとする課題】
前記した傾斜反射炉、旋回溶融炉等では、ダストが排気等により外部へ飛散することが多く、また、未溶融のまま燃焼ガスに搬送されてしまう課題がある。更に溶融を輻射伝熱に依存している場合には、灰表面の面積等の必要性かに設備が大型化せざるを得なかった。更に、熱交換器で排熱回収する場合には、揮発性物質が付着して性能が劣化する上、集じん機の能力が大きなものを必要としていた。また、前記電気炉では、ダストの飛散は抑えられるものの溶融エネルギコストが非常に高く、且つ電極の消耗が激しいため、操業コストの面で大きな課題があ
る。
【0004】
【課題を解決するための手段】
本発明は、前記課題を解決するために、蓄熱材を具えた給排気部と保炎部を具えた燃料供給部とを輻射管の両端部に有するリジェネレイティブバーナを、傾斜灰溶融室の上部壁に、傾斜溶融室の長手方向に対して直角に複数本並列させて設置し、各リジェネレイティブバーナに於いて交番燃焼させながら、前記傾斜灰溶融室内の灰を間接加熱により溶融して排出することを特徴とする焼却灰間接溶融装置を提供するものである。
【0005】
また、本発明は、前記課題を解決するために、リジェネレイティブバーナのうち、全部又は一部のバーナから燃焼ガスの一部を灰溶融室の溶出口の出口方向に導き溶融灰の流出を促進することを特徴とする焼却灰間接溶融方法を提供するものである。
【0006】
また、本発明は、前記課題を解決するために、蓄熱材を具えた給排気部と保炎部を具えた燃料供給部とを両端部に有するリジェネレイティブバーナを、傾斜灰溶融室の上部壁に複数本を設置したことを特徴とする焼却灰間接溶融装置を提供するものである。
【0007】
また、本発明は、前記課題を解決するために、傾斜灰溶融室のベッドを自然崩落線状に傾斜させたことを特徴とする焼却灰間接溶融装置を提供するものいである

【0008】
【作用】
先ず、A側に於いて、給排気部から導入された燃焼用空気は蓄熱材で予熱されて輻射管内に入る。一方、燃料供給管から導入された燃料は、保炎部に於いて前記した予熱空気と混合して燃焼を開始する。しかして、輻射管内で燃焼しながら灰溶融室内の灰を間接的に加熱して溶融する。排気ガスは、他方の即ち、B側の蓄熱材を予熱して排出される。かかる交番燃焼を、各リジェネレイティブバ−ナのA側及びB側に於いて、数10秒から数分間隔で各バーナ毎に交互に実行しながら、傾斜灰溶融室6内の灰を間接加熱により溶融する。かかる際、給排気部からの排気ガスの全部又は一部を溶出口に導き灰溶融物の排出を促進させる。
【0009】
【実施例】
符号1はリジェネレイティブバーナであって、2は、そのバーナ1の輻射管であり、その輻射管2の両端部には、蓄熱材3と燃料供給管4を設けた構成である。5は燃料供給管4の先端部に設けた保炎部である。かかる構成のリジェネレイティブバーナ1を傾斜灰溶融室6の上部壁に、傾斜灰溶融室6の長手方向に対して直角に、複数本設置する。7は灰導入部であって、8は溶出口、9は押出し装置である。10は溶融灰コンベア、11は、リジェネレイティブバーナ1の給排気部13からの燃焼排気ガス全部又は一部を導入して溶融灰の排出を促進する溶融灰排出促進部である。前記灰溶融室6のベッド12は自然崩落線状に傾斜させると溶融灰のコンベア10上への落下がスムーズに行なえる。
【0010】
先ずA側に於いて、給排気部13から導入された燃焼用空気は蓄熱材3で予熱されて輻射管2内に入る。一方、燃料供給管4から導入された燃料は、保炎部5に於いて前記した予熱空気と混合して燃焼を開始する。しかして、輻射管2内で燃焼しながら灰溶融室6内の灰14を間接的に加熱して溶融する。排気ガスは他方の即ち、B側の蓄熱材3を予熱して排出される。この際、排気ガスの一部を溶融灰排出促進部11に導いて溶融灰の排出に用いる。かかる燃焼を、各リジェネレイティブバーナ1のA側及びB側に於いて、数10秒から数分間隔で交互に実行しながら、傾斜灰溶融室6内の灰14を間接加熱により溶融する。以上の燃焼は複数の各バーナ毎に行なわれる。かかる際、前記リジェネレイティブバーナ1の全部又は一部のリジェネレイティブバーナ1の給排気部13から、排気ガスを溶出口8に導き灰溶融物の排出を促進させる。
また、灰溶融室6のベッド12を自然崩落線状に傾斜構成すると、溶融灰のコンベア10上への落下がスムーズに行える。
【0011】
【発明の効果】
本発明は以上の通りであるので、次の諸効果がある。▲1▼排気ガスが灰に汚染
されないので、性能が劣化せず、高い廃熱回収率が維持できる。▲2▼灰の舞上が
りのない燃焼排気により未溶融の灰が搬送されず、環境汚染がない。▲3▼装置が
簡単化し、設備コストをダウンすることができる。
【図面の簡単な説明】
【図1】図1は本発明の縦断面説明図である。
【図2】図2は本発明に使用するリジェネレイティブバーナの断面的説明図である。
【符号の説明】
1 リジェネレイティブバーナ
2 輻射管
3 蓄熱材
4 燃料供給管
5 保炎部
6 灰溶融室
7 灰導入部
8 溶出口
9 押し出し装置
10 溶融コンベア
11 溶融灰排出促進部
12 ベッド
13 給排気部
14 灰
[0001]
[Industrial applications]
The present invention relates to a method and an apparatus for indirectly melting incinerated ash.
[0002]
[Prior art]
Components such as incineration ash contain volatile components, which foam at high temperatures and need to be degassed. Conventionally, it is a method in which the incineration ash is sequentially melted from the surface by a burner, and there are various apparatuses such as an inclined reflection furnace, a swirling melting furnace, and an electric melting furnace for executing this method.
[0003]
[Problems to be solved by the invention]
In the above-mentioned inclined reverberatory furnace, swirling melting furnace, etc., there is a problem that dust often scatters to the outside due to exhaust gas or the like, and is transported unburned to the combustion gas. Furthermore, when melting depends on radiant heat transfer, the equipment must be enlarged due to the necessity of the area of the ash surface and the like. Further, in the case of recovering exhaust heat with a heat exchanger, the performance is deteriorated due to the attachment of volatile substances, and a dust collector having a large capacity is required. Further, in the electric furnace, scattering of dust is suppressed, but melting energy cost is extremely high, and electrode consumption is severe. Therefore, there is a large problem in operation cost.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a regenerative burner having a supply / exhaust unit provided with a heat storage material and a fuel supply unit provided with a flame holding unit at both ends of a radiant tube. On the upper wall, a plurality of the ash in the inclined ash melting chamber are melted by indirect heating while being arranged in parallel at a right angle to the longitudinal direction of the inclined melting chamber, and alternately burning in each regenerative burner. It is intended to provide an indirect incineration ash melting device characterized by discharging.
[0005]
Further, in order to solve the above-mentioned problems, the present invention guides a part of the combustion gas from all or a part of the regenerative burners to an exit direction of an elution port of an ash melting chamber to flow out the molten ash. It is intended to provide an indirect incineration ash melting method characterized by promoting.
[0006]
Further, in order to solve the above-mentioned problems, the present invention provides a regenerative burner having a supply / exhaust unit provided with a heat storage material and a fuel supply unit provided with a flame holding unit at both ends thereof, at the upper part of the inclined ash melting chamber. It is intended to provide an indirect incineration ash melting apparatus characterized by installing a plurality of incineration ash on a wall.
[0007]
The present invention also provides an incinerated ash indirect melting apparatus characterized in that the bed of the inclined ash melting chamber is inclined in the shape of a naturally falling line in order to solve the above problems.
[0008]
[Action]
First, on the A side, the combustion air introduced from the supply / exhaust section is preheated by the heat storage material and enters the radiation tube. On the other hand, the fuel introduced from the fuel supply pipe mixes with the preheated air in the flame holding section and starts burning. Thus, the ash in the ash melting chamber is indirectly heated and melted while burning in the radiation tube. The exhaust gas is discharged by preheating the other, that is, the heat storage material on the B side. The alternating combustion is performed indirectly on the A side and the B side of each regenerative burner at intervals of several tens of seconds to several minutes for each burner, and the ash in the inclined ash melting chamber 6 is indirectly heated. Melts. At this time, all or a part of the exhaust gas from the air supply / exhaust section is led to the elution port to promote discharge of the ash melt.
[0009]
【Example】
Reference numeral 1 denotes a regenerative burner, 2 denotes a radiation tube of the burner 1, and a heat storage material 3 and a fuel supply tube 4 are provided at both ends of the radiation tube 2. Reference numeral 5 denotes a flame holding section provided at the tip of the fuel supply pipe 4. A plurality of regenerative burners 1 having such a configuration are installed on the upper wall of the inclined ash melting chamber 6 at right angles to the longitudinal direction of the inclined ash melting chamber 6. 7 is an ash introduction part, 8 is an elution port, and 9 is an extruder. Reference numeral 10 denotes a molten ash conveyor, and reference numeral 11 denotes a molten ash discharge promoting unit that introduces all or a part of the combustion exhaust gas from the supply / exhaust unit 13 of the regenerative burner 1 to promote the discharge of the molten ash. When the bed 12 of the ash melting chamber 6 is inclined in a naturally collapsed line shape, the molten ash can be smoothly dropped onto the conveyor 10.
[0010]
First, on the A side, the combustion air introduced from the supply / exhaust section 13 is preheated by the heat storage material 3 and enters the radiation tube 2. On the other hand, the fuel introduced from the fuel supply pipe 4 mixes with the preheated air in the flame holding section 5 and starts combustion. Thus, the ash 14 in the ash melting chamber 6 is indirectly heated and melted while burning in the radiation tube 2. The exhaust gas is discharged by preheating the other, that is, the heat storage material 3 on the B side. At this time, a part of the exhaust gas is guided to the molten ash discharge promoting unit 11 and used for discharging the molten ash. The ash 14 in the inclined ash melting chamber 6 is melted by indirect heating while such combustion is alternately performed on the A side and the B side of each regenerative burner 1 at intervals of several tens of seconds to several minutes. The above combustion is performed for each of the plurality of burners. At this time, the exhaust gas is guided from the supply / exhaust portion 13 of all or part of the regenerative burner 1 to the elution port 8 to promote the discharge of the ash melt.
Further, when the bed 12 of the ash melting chamber 6 is configured to be inclined in the shape of a naturally falling line, the molten ash can be smoothly dropped onto the conveyor 10.
[0011]
【The invention's effect】
As described above, the present invention has the following effects. {Circle around (1)} Since the exhaust gas is not polluted by ash, the performance is not degraded and a high waste heat recovery rate can be maintained. (2) Unmelted ash is not transported by the combustion exhaust gas without ashes so that there is no environmental pollution. {Circle around (3)} The apparatus can be simplified and equipment costs can be reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory longitudinal sectional view of the present invention.
FIG. 2 is a sectional explanatory view of a regenerative burner used in the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 regenerative burner 2 radiant tube 3 heat storage material 4 fuel supply tube 5 flame holding unit 6 ash melting chamber 7 ash introduction unit 8 elution port 9 extrusion device 10 melting conveyor 11 molten ash discharge promoting unit 12 bed 13 supply / exhaust unit 14 ash

Claims (4)

蓄熱材を具えた給排気部と保炎部を具えた燃料供給部とを輻射管の両端部に有するリジェネレイティブバーナを、傾斜灰溶融室の上部壁に、傾斜溶融室の長手方向に対して直角に複数本並列させて設置し、各リジェネレイティブバーナに於いて交番燃焼させながら、前記傾斜灰溶融室内の灰を間接加熱により溶融して排出することを特徴とする焼却灰間接溶融装置A regenerative burner having a supply / exhaust section provided with a heat storage material and a fuel supply section provided with a flame holding section at both ends of the radiation tube is provided on the upper wall of the inclined ash melting chamber, in the longitudinal direction of the inclined melting chamber. Indirect incineration ash melting apparatus characterized in that ash in the inclined ash melting chamber is melted and discharged by indirect heating while alternately burning in each regenerative burner while arranging a plurality of ashes in parallel at right angles. リジェネレイティブバーナのうち、全部又は一部のバーナから燃焼ガスの一部を灰溶融室の溶出口の出口方向に導き溶融灰の流出を促進することを特徴とする請求項1記載の焼却灰間接溶融方法2. The incinerated ash according to claim 1, wherein a part of the combustion gas from all or a part of the regenerative burners is directed toward an outlet of an elution port of the ash melting chamber to promote outflow of the molten ash. Indirect melting method 蓄熱材を具えた給排気部と保炎部を具えた燃料供給部とを両端部に有するリジェネレイティブバーナを、傾斜灰溶融室の上部壁に複数本を設置したことを特徴とする焼却灰間接溶融装置Incineration ash characterized in that a plurality of regenerative burners having at each end a supply / exhaust section provided with a heat storage material and a fuel supply section provided with a flame holding section are provided on the upper wall of the inclined ash melting chamber. Indirect melting equipment 傾斜灰溶融室のベッドを自然崩落線状に傾斜させたことを特徴とする請求項3記載の焼却灰間接溶融装置4. The incinerated ash indirect melting apparatus according to claim 3, wherein the bed of the inclined ash melting chamber is inclined in a naturally collapsed line shape.
JP27788994A 1994-11-11 1994-11-11 Method and apparatus for indirect melting of incinerated ash Expired - Fee Related JP3552308B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27788994A JP3552308B2 (en) 1994-11-11 1994-11-11 Method and apparatus for indirect melting of incinerated ash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27788994A JP3552308B2 (en) 1994-11-11 1994-11-11 Method and apparatus for indirect melting of incinerated ash

Publications (2)

Publication Number Publication Date
JPH08135936A JPH08135936A (en) 1996-05-31
JP3552308B2 true JP3552308B2 (en) 2004-08-11

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* Cited by examiner, † Cited by third party
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KR102483231B1 (en) * 2021-10-12 2022-12-30 박진희 A Regenerative thermal oxidizer that treats odor gas with improved incineration characteristics according to double heat storage and flame size

Also Published As

Publication number Publication date
JPH08135936A (en) 1996-05-31

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