JPH11287432A - Ash melting furnace - Google Patents
Ash melting furnaceInfo
- Publication number
- JPH11287432A JPH11287432A JP10561098A JP10561098A JPH11287432A JP H11287432 A JPH11287432 A JP H11287432A JP 10561098 A JP10561098 A JP 10561098A JP 10561098 A JP10561098 A JP 10561098A JP H11287432 A JPH11287432 A JP H11287432A
- Authority
- JP
- Japan
- Prior art keywords
- slag
- ash
- oxygen
- molten slag
- furnace
- 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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Links
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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、都市ごみや産業廃
棄物の焼却炉より排出される焼却灰や飛灰並びに石炭焚
事業用ボイラ等から排出される灰等の被溶融部材である
灰の表面をバーナにより加熱溶融して、溶融灰を溶融ス
ラグとして出滓部より排出する灰溶融炉において、溶融
スラグの安定出滓用の加熱部よりなる出滓部加熱手段を
備えた灰溶融炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing ash which is a member to be melted such as incinerated ash and fly ash discharged from an incinerator for municipal solid waste and industrial waste and ash discharged from a boiler for a coal-fired business. The present invention relates to an ash-melting furnace which heats and melts a surface by a burner and discharges molten ash from a slag portion as a molten slag. .
【０００２】[0002]
【従来の技術】従来の一般に使用されているバーナ式灰
溶融炉においては、灰を主バーナで溶融した溶融スラグ
を安定的に排出させるため、溶融スラグの出滓部の対応
部位に補助バーナを設け、常時燃焼させることにより、
温度低下を防止して溶融スラグの安定出滓を図ってい
る。2. Description of the Related Art In a conventional burner type ash melting furnace generally used, an auxiliary burner is provided at a portion corresponding to a slag discharge portion of a molten slag in order to stably discharge molten slag in which ash is melted by a main burner. By providing and burning constantly,
The temperature is prevented from dropping to achieve stable slag removal of the molten slag.
【０００３】即ち、図６に示すように、従来の灰溶融炉
は、炉本体の一端側に設けた灰供給部５３と、他端側に
設けた排出口５７と、前記灰供給部５３と排出口５７と
の間に設けた傾斜状炉底５５と、該炉底５５上に前記灰
供給部５３より排出口５７へ向け形成された灰供給層５
９の表面を加熱して溶融灰２５を形成する炉天井５６に
設けた主バーナ５２とより構成されている。That is, as shown in FIG. 6, a conventional ash melting furnace has an ash supply section 53 provided at one end of a furnace body, a discharge port 57 provided at the other end side, and an ash supply section 53. An inclined furnace bottom 55 provided between the furnace bottom 55 and the discharge port 57, and an ash supply layer 5 formed on the furnace bottom 55 from the ash supply unit 53 toward the discharge port 57;
9 comprises a main burner 52 provided on a furnace ceiling 56 for forming the molten ash 25 by heating the surface.
【０００４】そして、上記主バーナ５２は、灰溶融炉の
炉天井５６の中央軸線上に設けられ、該バーナ内に圧送
された液体燃料を高圧空気ないし排熱ボイラの蒸気によ
り微粒子化して噴射し、それとともに供給される高温の
燃焼空気と混合させて前記微粒化された燃料を燃焼さ
せ、その火炎輻射熱が灰供給層５９の表面を加熱溶融す
るようにしてある。また、前記排出口５７側の炉底末端
近くが前記バーナ５２の火炎輻射領域に入るよう配設
し、前記排出口５７に向け移動を続ける灰供給層５９の
外表面を加熱溶融し、溶融灰２５を形成して溶融スラグ
２５ａとして排出口５７に設けた出滓部６４より滴下さ
せ、不図示の下部の水封コンベアを介して外部へ排出し
ている。The main burner 52 is provided on the central axis of the furnace ceiling 56 of the ash melting furnace, and the liquid fuel pumped into the burner is atomized by high-pressure air or steam from a waste heat boiler and injected. The finely divided fuel is burned by mixing with the high-temperature combustion air supplied therewith, and the flame radiant heat heats and melts the surface of the ash supply layer 59. Further, the outer surface of the ash supply layer 59 which continues to move toward the discharge port 57 is heated and melted by disposing the vicinity of the bottom end of the furnace on the discharge port 57 side near the flame radiating region of the burner 52. The molten slag 25 is formed and dropped as a molten slag 25a from a slag portion 64 provided at the discharge port 57, and is discharged to the outside via a lower water sealing conveyor (not shown).
【０００５】上記溶融スラグ２５ａとして溶融灰２５を
滴下させる際、溶融スラグ２５ａの安定出滓を維持すべ
く補助バーナ６６を備え、常時燃焼させて溶融スラグ２
５ａの滴下する出滓部６４の温度低下を防止している。When the molten ash 25 is dropped as the molten slag 25a, an auxiliary burner 66 is provided to maintain a stable slag of the molten slag 25a.
This prevents a drop in the temperature of the slag portion 64 into which the droplet 5a is dropped.
【０００６】[0006]
【発明が解決しようとする課題】ところで、上記補助バ
ーナによる溶融スラグが滴下する出滓部の温度低下の防
止には、設備費や運転経費、排ガス処理の問題が伴い、 １）設備費としては、主バーナ同様の構成部品を必要と
するとともに、補助バーナ用高温燃焼空気加熱のための
空気予熱手段を必要とし、更に、補助バーナ燃焼排ガス
が常時発生するため、排ガス処理設備の大型化等の設備
費増大の問題がある。 ２）排ガス処理の点では、一般に溶融炉から排出される
燃焼ガスは高温のため、燃焼空気中の窒素の一部が酸化
されてサーマルＮＯｘに転化する。このため、炉内に供
給する燃焼空気を２段または多段に制御してＮＯｘの発
生抑制を図っている。By the way, prevention of the temperature drop in the slag portion where the molten slag is dropped by the auxiliary burner involves problems of equipment cost, operation cost, and exhaust gas treatment. In addition to requiring the same components as the main burner, it also requires air preheating means for heating the high-temperature combustion air for the auxiliary burner. There is a problem of increased equipment costs. 2) In terms of exhaust gas treatment, since the combustion gas discharged from the melting furnace is generally high in temperature, a part of nitrogen in the combustion air is oxidized and converted into thermal NOx. For this reason, the combustion air supplied into the furnace is controlled in two or more stages to achieve the suppression of NOx generation.
【０００７】ところで、上記サーマルＮＯｘの発生のも
とになる窒素は灰分中にも、また燃料中にも含まれてい
ないため、ひとえに燃焼空気中に含まれる窒素に基因す
るものと考えられ燃焼気体には窒素含有分の少ない純酸
素を使用する傾向にある。この点からも、上記窒素を含
んだ高温燃焼空気を使用する補助バーナの設置は、排ガ
ス処理費の増大に繋がる問題である。 ３）運転経費の点では、燃費過大に繋がる問題がある。[0007] Since nitrogen, which is a source of the thermal NOx, is not contained in the ash nor in the fuel, it is considered that the nitrogen is contained solely in the nitrogen contained in the combustion air. Tend to use pure oxygen with low nitrogen content. From this point as well, the installation of the auxiliary burner using the high-temperature combustion air containing nitrogen is a problem that leads to an increase in the exhaust gas treatment cost. 3) In terms of driving costs, there is a problem that leads to excessive fuel consumption.
【０００８】本発明は、上記問題点の解決のためになさ
れたもので、溶融スラグの出滓部における安価で効果的
な加熱を可能とする、出滓部加熱手段を備えた灰溶融炉
の提供を目的とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an ash melting furnace provided with a slag heating means, which enables inexpensive and effective heating of the slag slag. It is intended to be provided.
【０００９】[0009]
【課題を解決するための手段】そこで、本発明の灰溶融
炉は、炉本体の一端側に灰供給口を設け、他端側に溶融
スラグの排出口を形成し、前記灰供給口から供給された
灰を傾斜した炉底に沿って前記排出口側へ移動させなが
らバーナにより加熱溶融する灰溶融炉において、前記排
出口への溶融スラグ出滓部に対面させてコントローラに
より制御された酸素ガス若しくは酸素富化空気の吹き出
し手段を設けた出滓部間欠加熱手段を備えたことを特徴
とするものである。Accordingly, in the ash melting furnace of the present invention, an ash supply port is provided at one end of the furnace main body, and a discharge port for molten slag is formed at the other end, and the ash supply port is supplied from the ash supply port. In an ash melting furnace in which the ash is heated and melted by a burner while moving the ash along the inclined furnace bottom to the discharge port side, an oxygen gas controlled by a controller so as to face a molten slag discharge portion to the discharge port Alternatively, an intermittent heating means for a slag part provided with a means for blowing oxygen-enriched air is provided.
【００１０】上記出滓部間欠加熱手段は、コントローラ
により制御された酸素ガス（若しくは酸素富化空気）と
ＬＰＧなどの気体燃料の供給手段と、吹き出し使用時の
み加熱部へ挿入可能の吹き出し手段とより構成しても良
い。[0010] The intermittent heating means for the slag part is a means for supplying oxygen gas (or oxygen-enriched air) controlled by a controller and a gaseous fuel such as LPG, and a blowing means which can be inserted into the heating part only when the blowing is used. It may be constituted by more.
【００１１】また、炉本体の一端側に灰供給口を設け、
他端側に溶融スラグの排出口を形成し、前記灰供給口か
ら供給された灰を傾斜した炉底に沿って前記排出口側へ
移動させながらバーナにより加熱溶融する灰溶融炉にお
いて、前記排出口への溶融スラグ出滓部に対面してコン
トローラにより制御されて酸素ガス（若しくは酸素富化
空気）とＬＰＧなどの気体燃料の間欠吹き出し手段を持
つ出滓部間欠加熱手段を備え、スラグ出滓部から出滓さ
れる溶融スラグの出滓状況を監視し、同出滓状況に対応
して前記コントローラを制御して、出滓部間欠加熱手段
を介して出滓部を加熱する出滓部監視制御手段を備え、
前記溶融スラグを安定的に出滓することを特徴とする。An ash supply port is provided at one end of the furnace body,
A discharge port for molten slag is formed on the other end side, and the ash supplied from the ash supply port is moved to the discharge port side along the inclined furnace bottom while being heated and melted by a burner. A slag slag intermittent heating means having an intermittent blowing means for an oxygen gas (or oxygen-enriched air) and a gaseous fuel such as LPG controlled by a controller facing the molten slag slag to the outlet; Monitoring of the slag discharge state of the molten slag discharged from the slag section, controlling the controller in accordance with the slag discharge state, and heating the slag section via the slag section intermittent heating means; Control means,
The molten slag is stably discharged.
【００１２】[0012]
【作用】本発明の第１発明である請求項１記載の発明
は、炉本体の他端側に設けた溶融スラグの出滓部におい
て、前記出滓部に対面させてコントローラにより制御さ
れた酸素ガス若しくは酸素富化ガスを吹き出す吹き出し
手段（以下酸素ランスという）を設けたため、該酸素ラ
ンスの先端より吹き出す酸素ないし酸素富化空気によ
り、前記出滓部で未燃ガスが燃焼し、溶融スラグ及び出
滓部を加熱することになり、出滓部の温度低下を防止で
き、安定した溶融スラグの出滓を可能にすることができ
る。上記酸素ランスは好ましくはパイプ状若しくはノズ
ル状のもので、センサ信号を受けて自動的に炉壁より炉
内に挿入され、出滓部を加熱し、加熱終了後は炉壁近傍
まで引き戻され待機する仕組みになっている。According to a first aspect of the present invention, there is provided an oxygen controlled by a controller in a slag discharge portion of a molten slag provided on the other end side of the furnace main body, the slag facing the slag portion. Since a blowing means (hereinafter referred to as an oxygen lance) for blowing a gas or an oxygen-enriched gas is provided, unburned gas is burned in the slag portion by oxygen or oxygen-enriched air blown from the tip of the oxygen lance, and molten slag and Since the slag portion is heated, the temperature of the slag portion can be prevented from lowering, and the slag of the molten slag can be stably discharged. The oxygen lance is preferably a pipe-shaped or nozzle-shaped one, and is automatically inserted into the furnace from the furnace wall upon receiving a sensor signal, and heats the slag portion. It is a mechanism to do.
【００１３】上記請求項１記載の発明において、出滓部
加熱手段を酸素ガス（若しくは酸素富化空気）とＬＰＧ
などの気体燃料の供給手段と、使用時のみ加熱部へ挿入
して酸素ガス（若しくは酸素富化空気）とＬＰＧなどの
気体燃料を吹き出す前記酸素ランスよりなる吹き出し手
段とより構成すれば、使用時には前記気体燃料と酸素ガ
スは燃焼し、加熱部を強制的に加熱できる。[0013] In the first aspect of the present invention, the heating means for the slag portion is provided with oxygen gas (or oxygen-enriched air) and LPG.
A gas fuel supply means such as the above, and a blowing means comprising the above-mentioned oxygen lance which is inserted into the heating section only at the time of use and blows out gaseous fuel such as oxygen gas (or oxygen-enriched air) and LPG. The gaseous fuel and the oxygen gas burn, and the heating unit can be forcibly heated.
【００１４】また、本発明の第２発明である請求項２記
載の発明は、出滓部間欠加熱手段とそれを出滓状況に応
じて制御する出滓部監視制御手段を備える構成としたも
ので、炉本体の他端側に設けた溶融スラグの出滓部にお
いて、溶融スラグ出滓部に対面させて出滓部監視制御手
段のコントローラにより制御されて、酸素ガス（若しく
は酸素富化空気）とＬＰＧなどの気体燃料の間欠吹き出
し手段（以下酸素ランスという）を設けるとともに、ス
ラグ出滓部から出滓される溶融スラグの出滓状況を監視
し、出滓状況に応じて前記出滓部間欠加熱手段を制御す
る出滓部監視制御手段を設けたため、出滓部の監視結果
に対応して、酸素ランスを加熱部まで前進させ、その先
端より酸素（ないし酸素富化空気）とＬＰＧなどの気体
燃料を吹き出させ燃焼させ、その燃焼ガスにより溶融ス
ラグ出滓部を加熱し、出滓部の温度低下を防止でき、安
定した溶融スラグの出滓を可能にすることができる。上
記酸素ランスは好ましくはパイプ状若しくはノズル状の
もので、コントローラの制御信号を受けて自動的に炉壁
より炉内に挿入され、出滓部を加熱し、加熱終了後は自
動的に炉壁近傍まで引き戻され、待機する仕組みになっ
ている。According to a second aspect of the present invention, there is provided an apparatus for intermittently heating a slag portion and a slag portion monitoring control means for controlling the intermittent slag portion according to the slag circumstance. In the molten slag discharge section provided on the other end side of the furnace main body, the molten slag discharge section is opposed to the molten slag discharge section, and is controlled by a controller of the lagging section monitoring control means, so that oxygen gas (or oxygen-enriched air) is obtained. And an intermittent blowing means (hereinafter referred to as an oxygen lance) for gaseous fuel such as LPG, and monitors the slag discharge state of the molten slag discharged from the slag discharge section. Since the slag part monitoring control means for controlling the heating means is provided, the oxygen lance is advanced to the heating part according to the monitoring result of the slag part, and oxygen (or oxygen-enriched air) and LPG etc. Blow out gaseous fuel Is burnt to heat the molten slag tapping unit by its combustion gas, it can prevent a temperature drop of tapping portion can allow the tapping of stable molten slag. The oxygen lance is preferably a pipe or a nozzle, and is automatically inserted into the furnace from the furnace wall upon receiving a control signal from the controller, heats the slag portion, and is automatically heated after the heating is completed. It is pulled back to the vicinity and waits.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施例の形態を、
図示例と共に説明する。ただし、この実施例に記載され
ている構成部品の寸法、形状、その相対的位置等は特に
特定的な記載がないかぎりは、この発明の範囲をそれに
限定する趣旨ではなく、単なる説明例にすぎない。なお
従来例を示す図面と同一機能部材については同一符号を
使用する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described.
This will be described together with the illustrated example. However, unless otherwise specified, the dimensions, shapes, relative positions, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent. Note that the same reference numerals are used for the same functional members as in the drawings showing the conventional example.
【００１６】図１は本発明の第１発明である出滓部加熱
手段を備えた灰溶融炉の概略の構成を示す模式図で、本
発明の灰溶融炉１０は、炉本体の一端側に設けた灰供給
部５３と、該灰供給部５３の灰貯留部６０より灰５０を
灰供給層５９を形成しながら炉本体の他端側に設けた排
出口５７に向け送り出す傾斜下降状の炉底５５と、前記
排出口５７と、炉本体の炉天井５６に設けた主バーナ５
２とよりなり、上記主バーナ５２は、前記排出口５７に
向け移動する灰供給層５９の表面上に火炎輻射領域を形
成して該領域を含む近傍の加熱領域の灰を加熱溶融さ
せ、溶融灰２５を形成して前記排出口５７へ溶融スラグ
出滓部６４を介して下部に向け溶融スラグ２５ａを滴下
させ、下部に設けた水封コンベア６９を介して外部へ排
出させる構成とし、一方主バーナ５２の燃焼ガスは、矢
印に示すように排ガスとなり、前記排出口５７を経て排
ガス流路６７を介し、不図示の２次燃焼室に導入される
ようにしてある。FIG. 1 is a schematic view showing a schematic configuration of an ash melting furnace provided with a slag-portion heating means according to a first invention of the present invention. An ash melting furnace 10 of the present invention is provided at one end of a furnace body. The ash supply part 53 provided, and the inclined down furnace for sending out the ash 50 from the ash storage part 60 of the ash supply part 53 toward the discharge port 57 provided on the other end side of the furnace body while forming the ash supply layer 59 A bottom 55, the discharge port 57, and a main burner 5 provided on a furnace ceiling 56 of the furnace body.
2, the main burner 52 forms a flame radiation area on the surface of the ash supply layer 59 moving toward the discharge port 57, and heats and melts ash in a heating area in the vicinity including the area. The ash 25 is formed, the molten slag 25a is dropped toward the lower portion through the molten slag discharge portion 64 to the discharge port 57, and the ash 25 is discharged to the outside through a water sealing conveyor 69 provided at the lower portion. The combustion gas of the burner 52 becomes exhaust gas as shown by an arrow, and is introduced into the secondary combustion chamber (not shown) through the exhaust port 57 and the exhaust gas passage 67.
【００１７】上記構成よりなる灰溶融炉１０において、
上記出滓部６４の滴下する溶融スラグ２５ａの対面部位
に酸素ランス１１を設け、前記排ガス流路６７へ誘導さ
れる排ガスの流れを介して酸素ランス１１は酸素発生装
置１３より供給される酸素を加熱部１７の溶融スラグ２
５ａに吹き出すように構成し、吹き出された酸素は排ガ
ス中の未燃分を燃焼させ、溶融スラグ２５ａの出滓部６
４を加熱し、安定した溶融スラグ２５ａの出滓を可能に
してある。なお、上記酸素ランス１１は、好ましくはパ
イプ状若しくはノズル状のもので、センサ１４により出
滓部６４の温度を検出し、該検出信号によりコントロー
ラ１２の指令によって自動的に可動機構１６を介して炉
内に挿入され、前記出滓部６４を加熱し、加熱終了後は
炉壁近傍まで引き戻され待機する仕組みになつている。
なお、上記酸素は酸素濃度略３０％程度の酸素富化空気
を使用しても良い。In the ash melting furnace 10 having the above structure,
An oxygen lance 11 is provided at a position opposite to the molten slag 25 a where the slag part 64 is dropped, and the oxygen lance 11 supplies oxygen supplied from the oxygen generator 13 through a flow of exhaust gas guided to the exhaust gas channel 67. Molten slag 2 of heating part 17
5a, and the blown oxygen burns the unburned portion of the exhaust gas to form a slag portion 6 of the molten slag 25a.
4 is heated to enable stable slag removal of the molten slag 25a. The oxygen lance 11 is preferably in the form of a pipe or a nozzle. The temperature of the slag portion 64 is detected by the sensor 14, and the detection signal is automatically transmitted through the movable mechanism 16 by a command from the controller 12. It is inserted into the furnace, heats the slag portion 64, and after heating is pulled back to the vicinity of the furnace wall to be on standby.
The oxygen may be oxygen-enriched air having an oxygen concentration of about 30%.
【００１８】図２には、図１に示す灰溶融炉において別
の実施形態よりなる出滓部加熱手段を備えた灰溶融炉の
概略の構成を示してある。図に見るように、出滓部加熱
手段を、酸素ガス（若しくは酸素富化空気）とＬＰＧな
どの気体燃料の供給手段と、使用時のみ加熱部へ挿入可
能の酸素ランスよりなる吹き出し手段により構成したも
のである。FIG. 2 shows a schematic configuration of an ash melting furnace shown in FIG. 1 and provided with a slag heating means according to another embodiment of the present invention. As shown in the figure, the slag part heating means is constituted by a supply means of oxygen gas (or oxygen-enriched air) and a gaseous fuel such as LPG, and a blowing means comprising an oxygen lance which can be inserted into the heating part only when used. It was done.
【００１９】即ち、センサ１４の検出信号により作動す
るコントローラ１２と、燃料吹き出し用酸素ランス１１
と、該酸素ランス１１を使用時のみ前記コントローラ１
２の指令により加熱部１７に挿入する可動機構１６と、
酸素ランス１１へコンントローラ１２の指令により酸素
ガス若しくは酸素富化空気を供給する酸素発生装置１３
と、同じくＬＰＧなどの気体燃料を供給する燃料タンク
１８とより構成してある。That is, the controller 12 which operates according to the detection signal of the sensor 14 and the oxygen lance 11
And the controller 1 only when the oxygen lance 11 is used.
A movable mechanism 16 inserted into the heating unit 17 in accordance with the command of 2;
Oxygen generator 13 that supplies oxygen gas or oxygen-enriched air to oxygen lance 11 according to a command from controller 12
And a fuel tank 18 for supplying a gaseous fuel such as LPG.
【００２０】上記構成により、センサ１４の検出信号に
対応して酸素ランス１１を加熱部１７の近傍へ挿入させ
るとともに、適当に混合された酸素ガス（若しくは酸素
富化空気）とＬＰＧなどの気体燃料とを吹き出し燃焼さ
せ、出滓部６４を強制的に適宜加熱させることができ、
溶融スラグ２５ａの安定出滓を可能とする。With the above configuration, the oxygen lance 11 is inserted into the vicinity of the heating unit 17 in response to the detection signal of the sensor 14, and an appropriately mixed oxygen gas (or oxygen-enriched air) and a gaseous fuel such as LPG And the slag portion 64 can be forcibly heated appropriately,
It enables stable slag removal of the molten slag 25a.
【００２１】図３は本発明の第２発明の概略の構成を示
す模式図で、出滓部間欠加熱手段とそれを出滓状況に応
じて制御する出滓部監視制御手段を備える構成としたも
ので、下記構成よりなる。本発明の灰溶融炉２０は、炉
本体の一端側に設けた灰供給部５３と、該灰供給部５３
の灰貯留部６０より灰５０を灰供給層５９を形成しなが
ら炉本体の他端側に設けた排出口５７に向け送り出す傾
斜下降状の炉底５５と、前記排出口と５７と、炉本体の
炉天井５６に設けた主バーナ５２とよりなり、上記主バ
ーナ５２は、前記排出口５７に向け移動する灰供給層５
９の表面上に火炎輻射領域を形成して該領域を含む近傍
の加熱領域の灰５０を加熱溶融させ、溶融灰２５を形成
して前記排出口５７への溶融スラグ２５ａの出滓部６４
を介して下部に向け溶融スラグ２５ａを滴下させ、下部
に設けた水封コンベア６９を介して外部へ排出させる構
成とし、一方主バーナ５２の燃焼ガスは、矢印に示すよ
うに排ガスとなり、前記排出口５７を経て排ガス流路６
７を介し不図示の２次燃焼室に導入されるようにしてあ
る。FIG. 3 is a schematic view showing a schematic structure of the second invention of the present invention, which is provided with intermittent heating means for the slag part and a means for monitoring and controlling the slag part according to the state of the slag. And has the following configuration. The ash melting furnace 20 of the present invention includes an ash supply unit 53 provided at one end side of the furnace body,
A sloping downward furnace bottom 55 for feeding ash 50 from an ash storage section 60 to an outlet 57 provided at the other end of the furnace body while forming an ash supply layer 59; The main burner 52 is provided on a furnace ceiling 56 of the ash supply layer 5.
9, the ash 50 in the vicinity of the heating region including the region is heated and melted to form the molten ash 25, and the slag portion 64 of the molten slag 25 a to the discharge port 57 is formed.
The molten slag 25a is dripped toward the lower part through the pipe and discharged to the outside through a water sealing conveyor 69 provided at the lower part. On the other hand, the combustion gas of the main burner 52 becomes exhaust gas as shown by an arrow, Exhaust gas channel 6 via outlet 57
7, and is introduced into a secondary combustion chamber (not shown).
【００２２】上記構成よりなる灰溶融炉２０において、
上記出滓部６４の滴下する溶融スラグ２５ａの対面部位
に酸素ランス２１を可動機構２２を介して前進後退可能
に設け、コントローラ２９の可動指令により加熱部２３
近傍まで前進させ、または挿入位置より炉壁近傍まで後
退させる構造にしてある。In the ash melting furnace 20 having the above configuration,
An oxygen lance 21 is provided at a position facing the molten slag 25 a where the slag part 64 is dropped so as to be able to move forward and backward through the movable mechanism 22.
It is structured to be advanced to the vicinity or to be retracted from the insertion position to the vicinity of the furnace wall.
【００２３】上記酸素ランス２１は、高圧空気供給源
（空気ブロア）３２ａより流量指示制御弁ＦＩＣ−３２
を介して供給された高圧空気に酸素供給源（酸素発生装
置ＰＳＡまたは酸素ボンベ）３３ａより流量指示制御弁
ＦＩＣ−３３を介して酸素を添加して所用濃度（２５〜
４０％）とした酸素富化空気ないし、高圧空気の供給を
零にして酸素のみの単独供給を受けるとともに、気体燃
料供給源３１ａより流量指示制御弁ＦＩＣ−３１を介し
てＬＰＧなどの気体燃料の供給を前記コントローラ２９
の指令を介して受け、出滓部６４の近傍に接近したノズ
ルより間欠噴射し燃焼させ、併せて未燃ガスも燃焼さ
せ、加熱部２３を強制的に加熱するようにしてある。The oxygen lance 21 is supplied from a high pressure air supply source (air blower) 32a to a flow rate control valve FIC-32.
Oxygen is added from the oxygen supply source (oxygen generator PSA or oxygen cylinder) 33a to the high-pressure air supplied via the flow rate control valve FIC-33 to achieve the required concentration (25 to
40%), the supply of oxygen-enriched air or high-pressure air is reduced to zero and oxygen alone is supplied, and gaseous fuel such as LPG is supplied from a gaseous fuel supply source 31a via a flow rate control valve FIC-31. Supply the controller 29
, And intermittently injects and burns from a nozzle approaching the vicinity of the slag portion 64, and also burns unburned gas, thereby forcibly heating the heating portion 23.
【００２４】また、炉本体の他端側の前記出滓部６４の
対面部位にあたる端面に、赤外線カメラ等の工業用ＣＣ
Ｄカメラ２４を設け、該カメラ２４により前記出滓部６
４より落下する溶融スラグ２５ａの出滓状況を監視撮像
し、その状況に対応して前記酸素ランス２１への燃料で
ある酸素ないし酸素富化空気またはＬＰＧなどの気体燃
料を適量供給の間欠制御をするとともに、前記酸素ラン
ス２１の可動機構２２の制御を可能とする出滓部監視制
御装置３０を設ける構成とする。Further, an industrial CC such as an infrared camera is attached to an end face of the furnace body opposite to the slag part 64 at the other end.
A D camera 24 is provided.
4 to monitor and image the slag status of the molten slag 25a that falls from there, and perform intermittent control for supplying an appropriate amount of gaseous fuel such as oxygen or oxygen-enriched air or LPG to the oxygen lance 21 in accordance with the status. At the same time, a configuration is provided in which a slag portion monitoring and control device 30 that enables control of the movable mechanism 22 of the oxygen lance 21 is provided.
【００２５】上記出滓部監視制御装置３０は、赤外線Ｃ
ＣＤカメラ２４と該ＣＣＤカメラ２４により得られた画
像に所用の加工、除去、合成、照合等の処理をする画像
処理部２７と、該処理部２７より得られたデータより所
用の演算をする演算部２８と、演算結果より所用の制御
指令を出力するコントローラ２９とより構成し、前記コ
ントローラ２９からの制御指令により前記流量指示制御
弁ＦＩＣ−３１、ＦＩＣ−３２、ＦＩＣ−３３、可動機
構２２がそれぞれ個別に作動するようにし、前記酸素ラ
ンス２１に酸素ないし酸素富化空気と気体燃料が供給さ
れるときは可動機構２２を介して加熱部２３の近傍まで
前進し、前記供給が終了したときは同じく可動機構２２
を介して炉壁近くまで後退するようにしてある。The slag monitoring and control device 30 is provided with an infrared C
An image processing unit 27 that performs necessary processing, such as processing, removal, synthesis, and collation, on the images obtained by the CD camera 24 and the CCD camera 24, and an operation that performs the required operation based on the data obtained by the processing unit 27 The flow rate control valves FIC-31, FIC-32, FIC-33, and the movable mechanism 22 are configured by a control unit 29 that outputs a required control command based on a calculation result. When the oxygen lance 21 is supplied with oxygen or oxygen-enriched air and gaseous fuel, it advances through the movable mechanism 22 to the vicinity of the heating unit 23, and when the supply is completed, Movable mechanism 22
It retreats to near the furnace wall via.
【００２６】上記出滓部６４の溶融スラグ２５ａの出滓
状況の監視に当たっては、まず、赤外線ＣＣＤカメラ２
４により、図４に示す堰６３に設けた出滓部６４のスラ
グ出滓口２６より落下する溶融スラグ２５ａの出口の幅
Ｙに対する、出口より所定距離だけ離れた位置における
幅ｙの基準値を設定して関連データを演算するととも
に、色信号による溶融スラグ２５ａの温度検出をする。In monitoring the state of the molten slag 25a of the slag part 64, first, the infrared CCD camera 2
4, the reference value of the width y of the molten slag 25a falling from the slag slag port 26 of the slag port 64 provided on the weir 63 shown in FIG. The associated data is calculated by setting, and the temperature of the molten slag 25a is detected by the color signal.
【００２７】以下に制御のための手順を図５により説明
する。図５（１）に示すように、赤外線ＣＣＤカメラ２
４から溶融スラグ２５ａの温度を求め、これをセット値
と比較して一定値以上変化したことが検知されたときは
酸素ランス２１の酸素ないし酸素富化空気の量または気
体燃料の間欠供給量を加減してスラグ温度を設定値に戻
す。The procedure for the control will be described below with reference to FIG. As shown in FIG. 5A, the infrared CCD camera 2
4. The temperature of the molten slag 25a is obtained from 4 and compared with the set value, and when it is detected that the temperature has changed by a certain value or more, the amount of oxygen or oxygen-enriched air in the oxygen lance 21 or the intermittent supply amount of gaseous fuel is determined. Add or subtract to return the slag temperature to the set value.
【００２８】また、同図（２）に示すように、積分処理
により溶融スラグ２５ａの面積を求め、その経時的変化
により流出スラグ量を検出しセット値面積と比較し、ス
ラグ温度に変化があったときは上記（１）の制御を行な
い、スラグ温度を調節する。このようにしてスラグ流出
量を所定値に維持する。As shown in FIG. 2B, the area of the molten slag 25a is obtained by the integration process, the amount of the slag flowing out is detected based on the change over time, and the slag temperature is compared with the set area. Then, the control of the above (1) is performed to adjust the slag temperature. In this way, the slag outflow is maintained at a predetermined value.
【００２９】さらに、同図（３）に示すように、スラグ
流れの変位Ｌをスキャンタイムｔを置いて検知し、これ
によりスラグ流出速度を求め、セット値と比較してスラ
グ流出速度が一定値以上変化したことが検出されたとき
は、上記（１）（２）により酸素ないし酸素富化空気の
供給量または気体燃料の供給量の調節によりスラグ流出
速度を一定値に維持する。Further, as shown in FIG. 3 (3), the displacement L of the slag flow is detected at a scan time t, and the slag outflow speed is obtained. When the change is detected, the slag outflow speed is maintained at a constant value by adjusting the supply amount of oxygen or oxygen-enriched air or the supply amount of gaseous fuel according to the above (1) and (2).
【００３０】[0030]
【発明の効果】上記記載のように、本発明の第１発明に
よれば、前記炉本体の他端側に溶融スラグの出滓部を備
えた灰溶融炉において、溶融スラグ出滓部の温度検出値
に対応して純酸素ないし酸素富化空気を吹き出すノズル
を持つ酸素ランスを設けてあるため、前記出滓部の温度
により随時酸素ランスを作動させ排ガス中の未燃分を燃
焼させ、出滓部を加熱して安定した溶融スラグの排出を
可能にすることができる。また、設備費としては、高温
燃焼空気用予熱装置の必要もなく、また酸素は主バーナ
用の酸素発生装置を兼用すればよく、温度検出制御部と
ノズル状の酸素吹き出し用酸素ランスだけの設備で済
み、安価に抑えることができる。また、サーマルＮＯｘ
の問題も純酸素または酸素富化空気の使用により低く抑
えることができる。As described above, according to the first aspect of the present invention, in an ash melting furnace having a molten slag slag portion on the other end side of the furnace main body, the temperature of the molten slag slag portion is increased. Since an oxygen lance having a nozzle for blowing out pure oxygen or oxygen-enriched air is provided in accordance with the detected value, the oxygen lance is operated at any time according to the temperature of the slag portion to burn unburned components in the exhaust gas and discharge the gas. The slag portion can be heated to enable stable discharge of the molten slag. In addition, the equipment cost does not require a preheating device for high-temperature combustion air, and oxygen only needs to be used as an oxygen generator for the main burner, and only a temperature detection control unit and a nozzle-shaped oxygen lance for blowing oxygen. And can be kept inexpensive. Also, thermal NOx
Can also be reduced by using pure oxygen or oxygen-enriched air.
【００３１】また、請求項２記載の第２発明により、出
滓部間欠加熱手段とそれを出滓状況に応じて制御する出
滓部監視制御手段を備える構成としたもので、炉本体の
他端側に溶融スラグの出滓部を備えた灰溶融炉におい
て、前記出滓部の溶融スラグの出滓状況を監視しその状
況に応じて、燃料吹き出し用酸素ランスを加熱部近傍に
前進させ、純酸素ないし酸素富化空気と気体燃料の間欠
吹き出し燃焼させ、併せて未燃ガスも燃焼させて、出滓
状況に的確に対応して出滓部を加熱するようにしたた
め、効率的、且つ安定した溶融スラグの出滓を可能にす
ることができる。According to a second aspect of the present invention, there is provided a structure including intermittent heating means for the slag part and means for monitoring and controlling the slag part in accordance with the state of the slag. In an ash melting furnace provided with a molten slag slag part on the end side, the state of the molten slag slag in the slag part is monitored and, depending on the situation, an oxygen lance for fuel blowing is advanced to the vicinity of the heating part, Efficient and stable because the intermittent blow-out combustion of pure oxygen or oxygen-enriched air and gaseous fuel and the unburned gas are also burned, and the slag part is heated appropriately in response to the slag condition. It is possible to make the molten slag slag removed.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の第１発明である出滓部加熱手段を備え
た灰溶融炉の概略の構成を示す模式図である。FIG. 1 is a schematic diagram showing a schematic configuration of an ash melting furnace provided with a slag heating unit according to a first invention of the present invention.
【図２】図１に示す灰溶融炉において別の実施形態より
なる出滓部加熱手段を備えた灰溶融炉の概略の構成を示
す模式図である。FIG. 2 is a schematic diagram showing a schematic configuration of an ash melting furnace provided with a slag heating unit according to another embodiment in the ash melting furnace shown in FIG. 1;
【図３】本発明の第２発明である、出滓部間欠加熱手段
とそれを制御する出滓部監視制御手段を備えた灰溶融炉
の概略の構成を示す模式図である。FIG. 3 is a schematic view showing a schematic configuration of an ash melting furnace according to a second invention of the present invention, which is provided with an intermittent slag heating means and a slag monitoring control means for controlling the ash melting section.
【図４】図２のスラグ出滓口における溶融スラグの出滓
状況を示す図である。FIG. 4 is a view showing a slag discharge state of a molten slag at a slag discharge port of FIG. 2;
【図５】図２の出滓部監視制御装置の制御の手順を示す
図である。FIG. 5 is a diagram showing a control procedure of the slag monitoring and control device of FIG. 2;
【図６】従来の灰溶融炉における出滓部加熱手段を示す
模式図である。FIG. 6 is a schematic view showing a slag heating means in a conventional ash melting furnace.
１０、２０ 灰溶融炉 １１、２１ 酸素ランス １２、２９ コントローラ １３ 酸素発生装置 １４ 温度センサ １５ 出滓部 １７、２３ 加熱部 １６、２２ 可動機構 ２４ 赤外線カメラ ２５ 溶融灰 ２５ａ 溶融スラグ ２６ 溶融スラグ出滓口 ２７ 画像処理部 ２８ 演算部 ２９ コントローラ ３０ 出滓部監視制御装置 ３１ａ 気体燃料供給源 ３２ａ 高圧空気供給源 ３３ａ 酸素供給源 10, 20 Ash melting furnace 11, 21 Oxygen lance 12, 29 Controller 13 Oxygen generator 14 Temperature sensor 15 Drainage section 17, 23 Heating section 16, 22 Movable mechanism 24 Infrared camera 25 Molten ash 25a Molten slag 26 Molten slag slag Mouth 27 Image processing unit 28 Operation unit 29 Controller 30 Slag monitoring and control device 31a Gas fuel supply source 32a High pressure air supply source 33a Oxygen supply source
フロントページの続き (72)発明者 佐藤 鉄雄 横浜市中区錦町12番地 三菱重工業株式会 社横浜製作所内 (72)発明者 小瀬 公利 横浜市中区錦町12番地 三菱重工業株式会 社横浜製作所内Continued on the front page (72) Inventor Tetsuo Sato 12 Nishikicho, Naka-ku, Yokohama-shi Inside Mitsubishi Heavy Industries, Ltd.Yokohama Mfg. Co., Ltd.
Claims (2)
側に溶融スラグの排出口を形成し、前記灰供給口から供
給された灰を傾斜した炉底に沿って前記排出口側へ移動
させながらバーナにより加熱溶融する灰溶融炉におい
て、 前記排出口への溶融スラグ出滓部に対面してコントロー
ラにより制御された酸素ガス若しくは酸素富化空気の吹
き出し手段を設けた出滓部間欠加熱手段を備えたことを
特徴とする灰溶融炉。1. An ash supply port is provided at one end of a furnace body, and a discharge port of molten slag is formed at the other end side. The ash supplied from the ash supply port is discharged along an inclined furnace bottom. In a ash melting furnace which heats and melts by a burner while moving to the side, a slag part provided with an oxygen gas or oxygen-enriched air blowing means controlled by a controller facing a molten slag slag part to the discharge port An ash melting furnace comprising intermittent heating means.
側に溶融スラグの排出口を形成し、前記灰供給口から供
給された灰を傾斜した炉底に沿って前記排出口側へ移動
させながらバーナにより加熱溶融する灰溶融炉におい
て、 前記排出口への溶融スラグ出滓部に対面してコントロー
ラにより制御されて酸素ガス（若しくは酸素富化空気）
とＬＰＧなどの気体燃料の間欠吹き出し手段を持つ出滓
部間欠加熱手段を備え、スラグ出滓部から出滓される溶
融スラグの出滓状況を監視し、同出滓状況に対応して、
前記コントローラを制御して出滓部間欠加熱手段を介し
て出滓部を加熱する出滓部監視制御手段を備え、前記溶
融スラグを安定的に出滓することを特徴とする灰溶融
炉。2. An ash supply port is provided at one end of the furnace main body, and a discharge port for molten slag is formed at the other end side, and the ash supplied from the ash supply port is discharged along the inclined furnace bottom. In the ash melting furnace, which is heated and melted by the burner while moving to the side, the oxygen gas (or oxygen-enriched air) is controlled by the controller facing the molten slag slag part to the discharge port.
And intermittent heating means of the slag part having intermittent blowing means of gaseous fuel such as LPG, and monitor the slag discharge state of the molten slag discharged from the slag discharge part,
An ash melting furnace, comprising: a slag part monitoring control means for controlling the controller to heat the slag part via an intermittent slag part heating means; and stably discharging the molten slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10561098A JP3999343B2 (en) | 1998-04-01 | 1998-04-01 | Ash melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10561098A JP3999343B2 (en) | 1998-04-01 | 1998-04-01 | Ash melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11287432A true JPH11287432A (en) | 1999-10-19 |
| JP3999343B2 JP3999343B2 (en) | 2007-10-31 |
Family
ID=14412282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10561098A Expired - Lifetime JP3999343B2 (en) | 1998-04-01 | 1998-04-01 | Ash melting furnace |
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| Country | Link |
|---|---|
| JP (1) | JP3999343B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015094478A (en) * | 2013-11-08 | 2015-05-18 | 三菱日立パワーシステムズ株式会社 | Solidified-material melt burner device, coal gasification furnace, and burner ignition method |
-
1998
- 1998-04-01 JP JP10561098A patent/JP3999343B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015094478A (en) * | 2013-11-08 | 2015-05-18 | 三菱日立パワーシステムズ株式会社 | Solidified-material melt burner device, coal gasification furnace, and burner ignition method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3999343B2 (en) | 2007-10-31 |
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