JP3096623B2 - Melting furnace - Google Patents

Melting furnace

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Publication number
JP3096623B2
JP3096623B2 JP07234896A JP23489695A JP3096623B2 JP 3096623 B2 JP3096623 B2 JP 3096623B2 JP 07234896 A JP07234896 A JP 07234896A JP 23489695 A JP23489695 A JP 23489695A JP 3096623 B2 JP3096623 B2 JP 3096623B2
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JP
Japan
Prior art keywords
tuyere
furnace
combustion
melting
gas
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
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JP07234896A
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Japanese (ja)
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JPH0979532A (en
Inventor
昌継 山縣
Original Assignee
株式会社クボタ
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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、廃棄物溶融処理炉、溶
鉱炉等の竪型の溶融炉に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical melting furnace such as a waste melting furnace and a blast furnace.

【0002】[0002]

【従来の技術】従来、上方から投入された廃棄物を底部
で燃焼溶融する炉本体を下窄まりに形成してロート部を
形成するとともに、前記ロート部の下方に、溶融部に向
けて燃焼用ガスを吹き込む羽口を備えた竪型の溶融炉が
用いられていた。
2. Description of the Related Art Conventionally, a furnace body for burning and melting waste injected from above at the bottom is formed in a lower constriction to form a funnel, and a furnace is provided below the funnel toward a melting part. A vertical melting furnace having a tuyere for blowing a working gas has been used.

【0003】[0003]

【発明が解決しようとする課題】従来、溶融炉において
は、廃棄物がロート部の炉壁に引っ掛かり、所謂棚吊り
を起こした場合には、棚吊りが解消するまで、下部羽口
からの補助燃料を増加させ、下部溶融部の温度を維持し
ていた。廃棄物による棚は下部から高温の排ガスが上昇
してくるため、次第に燃焼等の反応を受け、棚は上部廃
棄物を支えきれずに自然にくずれることにより解消され
る。しかし、このような方法で棚を崩壊させるには、量
的に多くの補助燃料を必要とし、かつ、その間は廃棄物
の処理能力が低下する。そこで、本発明の目的は、上記
の問題点を解決し、溶融炉の安定運転および補助燃料使
用量低減を可能にしながらも、棚吊りの発生を防止でき
る竪型の溶融炉を提供するところにある。
Conventionally, in a melting furnace, when wastes are caught on a furnace wall of a funnel and a so-called hanging of a shelf is caused, a support from a lower tuyere is used until the hanging of the shelf is canceled. The fuel was increased and the temperature of the lower melt was maintained. Since high-temperature exhaust gas rises from the lower part of the shelf made of waste, it gradually undergoes a reaction such as combustion, and the shelf is disintegrated naturally without being able to support the upper waste. However, collapsing the shelves in such a way requires a large amount of auxiliary fuel, and during that time the capacity of the waste is reduced. Therefore, an object of the present invention is to provide a vertical melting furnace capable of solving the above-mentioned problems and enabling the stable operation of the melting furnace and reducing the amount of auxiliary fuel used, while preventing the occurrence of hanging on a shelf. is there.

【0004】[0004]

【課題を解決するための手段】上記の目的のための本発
明の特徴構成は、羽口の上方のロート部の上端部、炉
壁近傍の補助燃焼領域に燃焼用ガスを供給し、前記炉壁
近傍の装入物を燃焼させて、前記ロート部(S)の部位
において生成しようとする棚の支持を失わせる第2の羽
口を備えた点にある(請求項1に対応)。尚、前記第2
の羽口を、前記ロート部の内壁に沿って前記流体を吹き
込むように、同一方向に偏向させて形成してもよい(請
求項2に対応)。
SUMMARY OF THE INVENTION A feature of the present invention for the above purpose is to provide a furnace at the upper end of a funnel above a tuyere.
Supplying combustion gas to an auxiliary combustion zone near the wall,
Burning the nearby charge, the site of the funnel (S)
(2 ) A second tuyere for losing the support of the shelf to be generated in (1) (corresponding to claim 1). In addition, the second
The tuyere, blow the fluid along the inner wall of the funnel portion
It may be formed so as to be deflected in the same direction so as to fit (corresponding to claim 2).

【0005】[0005]

【作用】従って、本発明の溶融炉の特徴構成によれば、
装入物の水分、性状及び形状等により棚吊りの起こしや
すさは異なるが、炉の形状が、炉の下方程狭くなるた
め、狭まる部位で棚吊りを起こしやすい。棚吊りは廃棄
物がロート部で耐火物表面の摩擦力を受けて、下方に落
ちないために生ずるのであるから、この耐火物表面
擦力を不安定にすると良い。そのため、棚吊りを起こし
かけている部位の装入物に近いロート部の上端部に設け
第2の羽口から酸素含有ガスが、炉壁近傍の補助燃焼
領域に吹き込まれると、第2の羽口に近接する炉壁近傍
の補助燃焼領域にある装入物が燃焼し、生成しようとす
る棚が支持を失うようになり、前記装入物は再び炉内を
下降するようになる(請求項1に対応)。尚、前記第2
の羽口から吹き込まれる前記燃焼用ガスが前記内壁の内
側に沿って吹き込まれれば、前記ロート部に近接する部
分の装入物は前記炉壁近傍の補助燃焼領域で前記内壁に
沿う部分が燃焼し、前記補助燃焼領域の装入物が圧密か
ら開放され、下降に対する摩擦力を除かれ、棚吊りを有
効に防止できる(請求項2に対応)。
Therefore, according to the characteristic structure of the melting furnace of the present invention,
The ease of hanging the shelves varies depending on the moisture, properties, shape, etc. of the charge, but the shape of the furnace becomes narrower below the furnace, so that the hanging of the shelves is likely to occur at the narrowed portion. Bridging receives the frictional force of the refractory surface waste funnel section, since it is the resulting to not fall down, may destabilize the frictional <br/> friction force of the refractory surface. Therefore, it is provided at the upper end of the funnel near the charge of the part where the shelves are hanging.
And the second oxygen-containing gas from the tuyere, the furnace wall near the auxiliary combustion
Near the furnace wall near the second tuyere when blown into the area
In the auxiliary combustion zone, the charge is burned, the shelf to be produced loses its support, and the charge descends again in the furnace (corresponding to claim 1). In addition, the second
The combustion gas blown from the tuyere of the inside of the inner wall
Lever is blown along the side, charge of the portion proximate to the funnel portion to the inner wall of the auxiliary combustion zone of the furnace wall near
Portion along burns, charge in the auxiliary combustion zone is released from the compacted, removed the frictional force against falling, have a hanging shelf
Can be effectively prevented (corresponding to claim 2).

【0006】[0006]

【発明の効果】以上の結果、本発明の請求項1記載の構
成の溶融炉によって、棚吊りを予防できるので、溶融炉
として安定した操炉と補助燃料の少ない技術を提供でき
るようになった。さらに、請求項2に記載の構成を加え
ることにより、棚吊り予防の操作のしやすい溶融炉を提
供できるようになる。
As a result of the above, with the melting furnace having the structure according to the first aspect of the present invention, the hanging of shelves can be prevented, so that it is possible to provide a stable furnace operation and a technique with less auxiliary fuel as a melting furnace. . Further, by adding the configuration according to the second aspect, it becomes possible to provide a melting furnace that is easy to operate for preventing hanging from a shelf.

【0007】[0007]

【実施例】以下に、一例として、本発明の溶融炉を廃棄
物溶融処理装置に適用した実施例を図面に基づいて説明
する。廃棄物溶融処理装置は、図1に示すように、夫々
空気或いは酸素富化ガス等の燃焼用ガスを吹き込みを2
箇所に設けた夫々複数の羽口3を備えた廃棄物溶融炉F
と、前記廃棄物溶融炉Fにおける発生ガスを燃焼使用す
るボイラ12と、前記ボイラ12に前記発生ガスを供給
する煙道11と、前記ボイラ12により生成された蒸気
により発電する発電装置16と、前記ボイラ12から排
出される廃ガスを処理する廃ガス処理装置13等を設け
て構成してある。前記廃棄物溶融炉Fは、上方から投入
された装入物を底部で燃焼溶融する前記炉本体1を下窄
まりに形成して、前記廃棄物溶融炉Fの内壁が上方に向
かって開いた形状のロート部としてのテーパー部Sを形
成するとともに、前記溶融部2の下方に湯溜り6を形成
して構成した竪型炉で、該炉内に、乾燥帯Z1、熱分解
帯Z2、及び燃焼溶融帯Z3という三つの処理帯を順次
上方から下方に配設してある。前記溶融部2の形成され
る領域と前記湯溜り6とで前記燃焼溶融帯Z3を形成す
る。各羽口3は、夫々前記燃焼用ガスとして予熱された
酸素富化空気の供給を受け、各羽口3にこれを分配する
環状管からなる風箱4を備え、前記風箱4から各羽口3
夫々に酸素富化空気を吹き込む羽口管5が接続されてお
り、前記溶融部2に前記燃焼用ガスを供給するべく前記
テーパ部Sの下方に第1の羽口3aを配置し、前記テー
パー部Sの上端部に、その供給する前記燃焼用ガスによ
り炉壁に沿って形成される補助燃焼領域Aに前記燃焼用
ガスを供給するべく第2の羽口3bを配置してある。前
記第1の羽口3aは、前記湯溜り6の上面付近に位置し
て前記溶融部2に向けて前記燃焼用ガスを吹き込むよう
に、前記テーパー部Sの内方に、且つ、やや下方に向け
て、周方向に複数箇所前記テーパー部Sを貫通して設け
られている。さらに、前記第1の羽口3aに酸素富化空
気を供給する前記羽口管5には、夫々プロパン等のガス
燃料を供給可能な補助燃料供給管が接続されており、前
記燃焼溶融帯Z3における可燃分が不足する場合に補助
燃料として添加供給できるようにしてある。前記第2の
羽口3bは、図2に示すように、吹き込む流体が前記テ
ーパー部Sの内壁に沿って旋回して吹き込まれるよう
に、前記テーパー部Sの内方に向けて水平面内の斜め方
向に、周方向に複数箇所前記テーパー部Sを貫通して設
けられている。このように形成してあるので、前記第2
の羽口3bから吹き込まれる酸素富化空気は炉壁に沿う
前記補助燃焼領域Aの部分に効果的に供給される。この
第2の羽口3bに酸素富化空気を供給する前記羽口管5
にも、夫々上記補助燃料供給管が接続されており、第2
の羽口3b近傍の前記補助燃焼領域Aの燃焼が不十分な
場合には補助燃料を添加供給できるようにしてある。
尚、前記補助燃焼領域Aに於ける燃焼温度は、前記溶融
部2に比して低く保って部分燃焼だけを行ない棚吊りの
防止の効果を発揮し、かつ、炉壁の損傷を防止できる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a melting furnace according to the present invention is applied to a waste melting apparatus will be described below with reference to the drawings. As shown in FIG. 1, the waste melting treatment apparatus blows a combustion gas such as air or an oxygen-enriched gas for 2 minutes.
Waste melting furnace F provided with a plurality of tuyeres 3
A boiler 12 that burns and uses generated gas in the waste melting furnace F, a flue 11 that supplies the generated gas to the boiler 12, and a power generator 16 that generates power using steam generated by the boiler 12; A waste gas treatment device 13 for treating waste gas discharged from the boiler 12 is provided. In the waste melting furnace F, the furnace main body 1 that burns and melts a charge introduced from above at the bottom is formed in a lower constriction, and the inner wall of the waste melting furnace F is opened upward. A vertical furnace formed by forming a tapered part S as a funnel part having a shape and forming a pool 6 below the melting part 2, wherein a drying zone Z 1, a pyrolysis zone Z 2, Three treatment zones, a combustion melting zone Z3, are sequentially arranged from the upper side to the lower side. The region where the melting portion 2 is formed and the pool 6 form the combustion melting zone Z3. Each tuyere 3 is provided with a wind box 4 composed of an annular tube for receiving the supply of oxygen-enriched air preheated as the combustion gas and distributing it to each tuyere 3. Mouth 3
A tuyere tube 5 for blowing oxygen-enriched air is connected to each of them. A first tuyere 3a is disposed below the tapered portion S so as to supply the combustion gas to the melting portion 2; At the upper end of the section S, a second tuyere 3b is arranged to supply the combustion gas to an auxiliary combustion area A formed along the furnace wall by the supplied combustion gas. The first tuyere 3a is located near the upper surface of the pool 6 so as to blow the combustion gas toward the melting portion 2 so as to be inward of the tapered portion S and slightly below. The taper portion S is provided at a plurality of locations in the circumferential direction. Further, an auxiliary fuel supply pipe capable of supplying gaseous fuel such as propane is connected to the tuyere pipe 5 for supplying oxygen-enriched air to the first tuyere 3a. In the case where the combustible component is insufficient, it can be added and supplied as auxiliary fuel. As shown in FIG. 2, the second tuyere 3b is inclined in a horizontal plane toward the inside of the tapered portion S so that the fluid to be blown is swirled and blown along the inner wall of the tapered portion S. The taper portion S is provided at a plurality of locations in the circumferential direction. Since it is formed in this manner, the second
The oxygen-enriched air blown from the tuyere 3b is effectively supplied to the portion of the auxiliary combustion zone A along the furnace wall. The tuyere tube 5 for supplying oxygen-enriched air to the second tuyere 3b
Are connected to the auxiliary fuel supply pipes respectively.
If the combustion in the auxiliary combustion area A near the tuyere 3b is insufficient, auxiliary fuel can be added and supplied.
In addition, the combustion temperature in the auxiliary combustion area A is kept lower than that of the melting portion 2 to perform only partial combustion, thereby exhibiting the effect of preventing shelving and preventing damage to the furnace wall.

【0008】ゴミ収集車により収集された廃棄物は、前
記廃棄物溶融炉Fの上方に設けたホッパ9に投入され、
前記ホッパ9の下部に備えた上部ダンパ10a、下部ダ
ンパ10bからなる二重ダンパ機構10を交互に開閉操
作することにより、前記廃棄物溶融炉Fにおける発生ガ
スが前記ホッパ9に吹き上げるのを防止しながら、前記
廃棄物溶融炉Fに投入される。前記廃棄物溶融炉Fに投
入された廃棄物は、約300℃から500℃に維持され
る乾燥帯Z1で乾燥され、さらに下降して約500℃か
ら800℃に維持される熱分解帯Z2で廃棄物に含まれ
る揮発性有機物が大部分メタン、水素、一酸化炭素等の
可燃性ガス及び二酸化炭素に熱分解された発生ガスとし
て熱分解帯Z2から乾燥帯Z1を経て上昇流出し、ガス
化後の残渣は約1500℃に維持される燃焼溶融帯Z3
の溶融部2で前記残渣中の可燃分が燃焼し、溶融処理さ
れるものである。廃棄物に含まれる塩化ビニル等が前記
熱分解帯Z2で分解される過程で発生する塩化水素等の
腐食性ガスは、ボイラ12を通った後、煙道を兼ねた反
応室でそこに供給された石灰粉末等アルカリ剤と中和反
応して塩化カルシウム等の塩類として固定された後、前
記反応室に続くバグフィルタで捕捉除去される。前記燃
焼溶融帯Z3では、主としてその燃焼部2で、前記廃棄
物溶融炉Fの上方から投入され、乾燥・熱分解を受けた
廃棄物の熱分解残渣の可燃分が前記燃焼溶融帯Z3の側
壁部に形成された第1の羽口3aから湯溜り6の上面に
向けて供給される前記燃焼用ガスに接して燃焼反応し、
高温高熱を発し、同時に湯溜り6中に残存する可燃分も
液中燃焼する。この熱により灰分や無機物等の前記熱分
解残渣中の不燃分が溶融処理され、溶融したスラグが流
下して前記湯溜り6に溜まると同時に、前記湯溜り6も
保温される。前記溶融スラグは、前記湯溜り6の側方に
設けられたスラグ排出部7の溢出口7aからオーバーフ
ローしてスラグ回収装置8内に排出される。同時に前記
燃焼部2で発生する熱が、燃焼排ガスの上昇に伴って、
前記熱分解帯Z2での熱分解処理、前記乾燥帯Z1での
乾燥処理に供される。前記燃焼反応による発熱量が、前
記熱分解処理及び前記乾燥処理にとって不足である場合
には、前記燃焼用ガスにさらにメタンガス等のガス燃
料、或いは、炭素粉等の微粉燃料が補助燃料として羽口
管5に補助燃料供給管から供給添加されて第1の羽口3
aから前記溶融部2に供給される。さらに、前記第2の
羽口3bが、前記テーパー部Sの上端部に設けられてお
り、前記燃焼用ガスをこの部位の前記熱分解帯Z2で熱
分解した後の前記熱分解残渣中の前記テーパー部Sの炉
壁の部位に供給し、この前記燃焼用ガスに接した前記補
助燃焼領域A内の前記熱分解残渣中の可燃分が燃焼し、
そこの廃棄物がくずれるので装入廃棄物の棚吊りを阻止
する。つまり、前記第2の羽口3bは上方から下方へ移
動する廃棄物が下窄まりになる炉壁部で圧密され、棚吊
りを惹起するのを防ぐ為に、その圧密部付近の前記補助
燃焼領域Aに前記燃焼用ガスを供給して、燃焼反応によ
って、棚吊りの原因となる前記圧密される部分を圧密か
ら開放しようとするものである。上述のように、前記第
2の羽口3bを設けることにより棚吊りを防止するの
で、炉内の廃棄物の下方への移動がスムーズとなり、即
ち、高温燃焼部へガス化残渣のカーボンがスムーズに供
給される。そこに酸素もしくは酸素富化ガスが供給され
るので、この結果本発明の溶融炉は補助燃料なしか、必
要としてもごく少量で高温燃焼ができるようになった。
[0008] The waste collected by the garbage truck is put into a hopper 9 provided above the waste melting furnace F,
By alternately opening and closing the double damper mechanism 10 including the upper damper 10a and the lower damper 10b provided in the lower part of the hopper 9, the generated gas in the waste melting furnace F is prevented from blowing up to the hopper 9. While being fed into the waste melting furnace F. The waste put into the waste melting furnace F is dried in a drying zone Z1 maintained at about 300 ° C. to 500 ° C., and further descends in a pyrolysis zone Z2 maintained at about 500 ° C. to 800 ° C. Most of the volatile organic matter contained in the wastes rises and flows out of the pyrolysis zone Z2 through the drying zone Z1 as a combustible gas such as methane, hydrogen, carbon monoxide and the like as a generated gas thermally decomposed into carbon dioxide, and is gasified. The remaining residue is a combustion melting zone Z3 maintained at about 1500 ° C.
The combustibles in the residue are burned in the melting section 2 of the above, and are melted. Corrosive gas such as hydrogen chloride generated in the process of decomposing vinyl chloride and the like contained in the waste in the thermal decomposition zone Z2 passes through the boiler 12 and is supplied thereto in a reaction chamber also serving as a flue. After being neutralized with an alkali agent such as lime powder and fixed as salts such as calcium chloride, it is captured and removed by a bag filter following the reaction chamber. In the combustion / melting zone Z3, the combustible components of the pyrolysis residue of the waste which has been thrown in from the upper part of the waste melting furnace F and which has been dried and thermally decomposed are mainly injected into the combustion section 2 at the side of the combustion / melting zone Z3. The first tuyere 3a formed in the portion contacts the combustion gas supplied toward the upper surface of the pool 6 and performs a combustion reaction,
A high temperature and a high heat are generated, and at the same time, the combustibles remaining in the basin 6 also burn in the liquid. The heat causes non-combustible components in the pyrolysis residue, such as ash and inorganic substances, to be melted, and the molten slag flows down and accumulates in the pool 6, and at the same time, the pool 6 is kept warm. The molten slag overflows from an overflow port 7 a of a slag discharge section 7 provided on a side of the pool 6 and is discharged into a slag recovery device 8. At the same time, the heat generated in the combustion unit 2 is
It is subjected to a thermal decomposition process in the thermal decomposition zone Z2 and a drying process in the drying zone Z1. When the calorific value due to the combustion reaction is insufficient for the pyrolysis treatment and the drying treatment, a gas fuel such as methane gas or a fine powder fuel such as carbon powder is further added to the combustion gas as a tuyere. The first tuyere 3 is supplied and added to the pipe 5 from the auxiliary fuel supply pipe.
a to the melting portion 2. Further, the second tuyere 3b is provided at an upper end portion of the tapered portion S, and the combustion gas is thermally decomposed in the pyrolysis zone Z2 at this portion, and the second gas is contained in the pyrolysis residue. The combustible component in the pyrolysis residue in the auxiliary combustion region A in contact with the combustion gas is supplied to the portion of the furnace wall of the tapered portion S,
Since the waste there is destroyed, the hanging of the loaded waste is prevented. That is, the second tuyere 3b is compacted at the furnace wall where the waste moving from the upper part to the lower part is constricted, and the auxiliary combustion in the vicinity of the compacted part is prevented in order to prevent the shelf from hanging. The combustion gas is supplied to the region A, and the portion to be compacted, which causes the hanging of the shelf, is released from the compaction by the combustion reaction. As described above, since the shelves are prevented by providing the second tuyere 3b, the downward movement of the waste in the furnace becomes smooth, that is, the carbon of the gasification residue smoothly flows into the high temperature combustion section. Supplied to Oxygen or an oxygen-enriched gas is supplied thereto, and as a result, the melting furnace of the present invention can perform high-temperature combustion with little or no need of auxiliary fuel.

【0009】前記湯溜り6の側方にはスラグ排出部7が
設けられ、前記溶融スラグが溢出口7aからオーバーフ
ローして、前記スラグ排出部7から冷却水を蓄えた水冷
槽8bの中に滴下し、急冷されて水砕スラグとなる。前
記水冷槽8bの底部には水砕スラグを搬出すべくスラグ
搬送装置が設けられており、このスラグ搬送装置によっ
て水砕スラグが随時取り出される。前記スラグ排出部7
の溢出口7a底部の先端部は、その直下の前記スラグ回
収装置8の側壁部8aから張り出して形成してあり、溶
融スラグが前記溢出口7aから前記直下の側壁部8aに
連続して流下、付着することを防止してある。
A slag discharge section 7 is provided on the side of the pool 6 and the molten slag overflows from an overflow port 7a and drops into a water cooling tank 8b storing cooling water from the slag discharge section 7. It is quenched and becomes granulated slag. A slag conveying device is provided at the bottom of the water cooling tank 8b to carry out the granulated slag, and the granulated slag is taken out by the slag conveying device at any time. The slag discharge section 7
The tip of the bottom of the overflow 7a is formed so as to protrude from the side wall 8a of the slag recovery device 8 immediately below the overflow slag, and the molten slag flows down from the overflow 7a continuously to the side wall 8a immediately below. Adhesion is prevented.

【0010】前記ボイラ12は、燃焼器12aを備えた
燃焼室12bに水管12cを配して構成してあり、前記
廃棄物溶融炉Fにおいて発生した約300℃〜500℃
の可燃性ガスが、前記廃棄物溶融炉Fと前記燃焼器12
aの間に形成された煙道11を介して供給され、前記燃
焼器12aで発生した高温の燃焼ガスは、熱交換された
後に誘引送風機14により誘引されてエコノマイザ12
dやバグフィルタ等の排ガス処理装置13を介して煙突
15から排気される。前記煙道11には、発生ガスを前
記煙道11内部で部分燃焼させる燃焼用の制御できる酸
素又は酸素含有気体供給口11aを、流入空気が前記煙
道11の下流側に流れるように角度を持たせた筒状のガ
イド部材を設けて構成してあり、前記供給口11aから
例えば空気が供給されると、その空気により前記煙道1
1を通過する発生ガスの一部が燃焼し、その際に発生す
る燃焼熱により発生ガスの温度低下を回避し、以て、気
化したタールが前記煙道11内で凝縮して内壁に付着す
ることを防止する。前記ボイラ12で生成された蒸気
は、発電機16bを駆動する蒸気タービン16aを備え
た発電装置16に安定的に供給され、前記発電装置16
で発電された電力が廃棄物溶融処理装置の稼働用の電力
として使用され、余剰電力は外部に供給される。
The boiler 12 has a water chamber 12c disposed in a combustion chamber 12b provided with a combustor 12a, and has a temperature of about 300 ° C. to 500 ° C. generated in the waste melting furnace F.
The combustible gas of the waste melting furnace F and the combustor 12
The high-temperature combustion gas which is supplied through the flue 11 formed between the a.
The exhaust gas is exhausted from the chimney 15 through an exhaust gas treatment device 13 such as d and a bag filter. The flue 11 is provided with a controllable oxygen or oxygen-containing gas supply port 11a for combustion for partially burning the generated gas inside the flue 11 so that the inflow air flows downstream of the flue 11. For example, when air is supplied from the supply port 11a, the flue 1
Part of the generated gas passing through 1 burns, and the temperature of the generated gas is avoided by the combustion heat generated at that time, so that the vaporized tar condenses in the flue 11 and adheres to the inner wall. To prevent that. The steam generated by the boiler 12 is stably supplied to a power generator 16 having a steam turbine 16a for driving a generator 16b.
The electric power generated in the above is used as electric power for operating the waste melting treatment apparatus, and surplus electric power is supplied to the outside.

【0011】〔別実施例〕以下、別実施例について説明
する。前記第1の羽口3aは、直接前記湯溜り6の中に
吹き込むような位置に設けてもよく、また、前記溶融部
2と前記湯溜り6との間に生ずる空間内に吹き込むよう
な位置に設けてもよく、前記第1の羽口3aを前記溶融
部2の下端部より上の前記溶融部2に直接吹き込むよう
な位置に設けてもよい。第1の位置に設ける場合には、
前記湯溜り6中の可燃分を液中燃焼させることが可能で
あり、第2の位置に設ける場合には、前記湯溜り6の表
面に前記燃焼用ガスを吹き付けて、前記湯溜り6を攪拌
するとともに、さらに溶融スラグの保温維持を促進する
ことが可能であり、第3の位置に設ける場合には、廃棄
物が高カロリーの場合であり、前記溶融部2をより大き
な領域に拡大できる。また、前記第1の羽口3aは、水
平方向に設けられてあってもよく、炉の中心に向くよう
にしてもよい。前記第2の羽口3bは、上記実施例で
は、水平面内に設けたが、やや下向きに設けてもよい。
さらに、これらを、吹き込む燃焼用ガスを旋回させるこ
となく、炉心に向けて吹き込むように設けてもよい。つ
まり、第2の羽口3bから吹き込まれる燃焼用ガスに接
する熱分解残渣の補助燃焼領域Aが前記溶融領域2と不
連続で、且つ、炉壁に近接する部分に形成されるように
なればよい。なお、この第2の羽口3bを水平面内或い
はやや下向きに、且つ、前記テーパー部Sの内方に向け
て配置し、テーパー部に接する廃棄物を燃焼し、空隙を
つくればよい。棚吊りを予防することができるので、前
記圧密を解消させるために前記補助燃焼領域Aを炉壁に
沿って形成させるのである。尚、前記第2の羽口3b
は、前記熱分解帯Z2と前記燃焼溶融帯Z3との境界付
近の前記テーパー部Sの部位に、吹き込む前記酸素富化
空気が前記テーパー部Sの内壁に沿って旋回して吹き込
まれるように、前記テーパー部Sの内方に向けて斜め下
方向に設けてもよい。また、これらを、吹き込む前記酸
素富化空気が前記テーパー部Sの内壁の内側で旋回して
吹き込まれるように、前記テーパー部Sの内方に向けて
水平面内に設けてもよく、斜め下方向に設けてもよい。
さらに、前記第2の羽口3bは、前記熱分解帯Z2と前
記燃焼溶融帯Z3との境界付近の前記テーパー部Sの部
位に、吹き込む前記酸素富化空気もしくは空気が前記テ
ーパー部Sの中心に向けて吹き込まれるように、前記テ
ーパー部Sの内方に向けて水平面内或いはやや下向きに
設けてもよい。この場合には、前記酸素富化空気もしく
は空気の吹き込みを、炉壁に沿って前記補助燃焼領域A
を最小限部分的にでも形成させるように調整すれば本発
明の目的は達成できる。前記実施例では、前記第1の羽
口3aから吹き込まれる燃焼用ガスにガスもしくはオイ
ル等補助燃料を添加するようにしたが、これに代えて投
入材にコークスを添加するようにしてもよく、さらに、
燃焼用ガスとして、酸素富化ガスに代えて空気を吹き込
むようにしてあってもよい。また、前記第2の羽口3b
から吹き込む燃焼用ガスも予熱するようにしたが、これ
も予熱しないで吹き込むことも可能で、さらに、補助燃
料を添加して吹き込むようにしてもよい。このように補
助燃料を添加して第2の羽口3bから吹き込めば、廃棄
物のカロリーが低い場合等の異常に温度が低下して棚吊
りが起ころうとする場合にも充分に対処できる。
[Another embodiment] Hereinafter, another embodiment will be described. The first tuyere 3a may be provided at a position where the first tuyere 3a blows directly into the well 6 or a position where the first tuyere 3a blows into a space formed between the melting portion 2 and the well 6. The first tuyere 3a may be provided at a position where the first tuyere 3a is directly blown into the melting part 2 above the lower end of the melting part 2. When providing at the first position,
The combustibles in the basin 6 can be burned in liquid, and when provided in the second position, the combustion gas is sprayed on the surface of the basin 6 to stir the basin 6. In addition, it is possible to further promote the maintenance of the temperature of the molten slag. If the molten slag is provided at the third position, the waste is high in calories, and the molten portion 2 can be expanded to a larger area. Further, the first tuyere 3a may be provided in a horizontal direction, and may be directed to the center of the furnace. Although the second tuyere 3b is provided in the horizontal plane in the above embodiment, it may be provided slightly downward.
Further, these may be provided so as to be blown toward the reactor core without swirling the combustion gas to be blown. That is, if the auxiliary combustion region A of the pyrolysis residue in contact with the combustion gas blown from the second tuyere 3b is formed discontinuously with the melting region 2 and at a portion close to the furnace wall. Good. Note that the second tuyere 3b may be arranged in a horizontal plane or slightly downward and inward of the tapered portion S to burn wastes in contact with the tapered portion S to form a gap. Since the hanging on the shelf can be prevented, the auxiliary combustion area A is formed along the furnace wall to eliminate the consolidation. The second tuyere 3b
Is such that the oxygen-enriched air to be blown is swirled and blown along the inner wall of the tapered portion S at a portion of the tapered portion S near a boundary between the thermal decomposition zone Z2 and the combustion and melting zone Z3. It may be provided obliquely downward toward the inside of the tapered portion S. Further, these may be provided in a horizontal plane toward the inside of the tapered portion S so that the oxygen-enriched air to be blown is swirled and blown inside the inner wall of the tapered portion S. May be provided.
Further, the second tuyere 3b is configured such that the oxygen-enriched air or air blown to the portion of the tapered portion S near the boundary between the thermal decomposition zone Z2 and the combustion / melting zone Z3 is formed at the center of the tapered portion S. May be provided in a horizontal plane or slightly downward toward the inside of the tapered portion S so as to be blown toward. In this case, the blowing of the oxygen-enriched air or air is performed along the furnace wall along the auxiliary combustion zone A.
The object of the present invention can be achieved by adjusting so that is formed at least partially. In the embodiment, auxiliary fuel such as gas or oil is added to the combustion gas blown from the first tuyere 3a. Alternatively, coke may be added to the input material. further,
As the combustion gas, air may be blown instead of the oxygen-enriched gas. In addition, the second tuyere 3b
Although the combustion gas blown from above is also preheated, it is also possible to blow it without preheating, and it is also possible to add auxiliary fuel and blow it in. When the auxiliary fuel is added and blown from the second tuyere 3b in this way, it is possible to sufficiently cope with a case where the temperature is abnormally lowered and the shelf is about to be suspended, such as when the calories of the waste are low.

【0012】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。
In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

【図面の簡単な説明】[Brief description of the drawings]

【図1】廃棄物溶融処理装置のブロック構成図FIG. 1 is a block diagram of a waste melting apparatus.

【図2】第2の羽口の別実施例を示す横断面図FIG. 2 is a cross-sectional view showing another embodiment of the second tuyere.

【符号の説明】[Explanation of symbols]

1 溶融炉の炉本体 2 溶融炉の溶融部 3a 羽口 3b 第2の羽口 S 溶融炉のテーパー部 Reference Signs List 1 Furnace main body of melting furnace 2 Melting part of melting furnace 3a Tuyere 3b Second tuyere S Taper part of melting furnace

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F23G 5/24 F23G 5/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F23G 5/24 F23G 5/00

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 上方から投入された装入物を底部で燃焼
溶融する炉本体(1)を下窄まりに形成してロート部
(S)を形成するとともに、前記ロート部(S)の下方
に、溶融部(2)に向けて燃焼用ガスを吹き込む羽口
(3a)を備えた竪型の溶融炉であって、 前記羽口(3a)の上方の前記ロート部(S)の上端部
、炉壁近傍の補助燃焼領域(A)に燃焼用ガスを供給
し、前記炉壁近傍の装入物を燃焼させて、前記ロート部
(S)の部位において生成しようとする棚の支持を失わ
せる第2の羽口(3b)を備えた溶融炉。
1. A furnace body (1), which burns and melts a charge charged from above at a bottom portion, is formed in a lower constriction to form a funnel portion (S) and a portion below the funnel portion (S). A vertical melting furnace provided with a tuyere (3a) for blowing a combustion gas toward a melting part (2), wherein an upper end of the funnel (S) above the tuyere (3a). The combustion gas is supplied to the auxiliary combustion area (A) near the furnace wall.
Then, the charge near the furnace wall is burned, and the funnel
Loses support of shelf to be created in part (S)
Melting furnace with the second tuyere to (3b) to.
【請求項2】 前記第2の羽口(3b)を、前記ロート
部(S)の内壁の内側に沿って前記流体を吹き込むよう
に、同一方向に偏向させて形成してある請求項1記載の
溶融炉。
Wherein the second tuyere (3b), so as to blow the fluid along the inside of the inner wall of the funnel portion (S)
2. The melting furnace according to claim 1, wherein the melting furnace is formed so as to be deflected in the same direction.
JP07234896A 1995-09-13 1995-09-13 Melting furnace Expired - Fee Related JP3096623B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07234896A JP3096623B2 (en) 1995-09-13 1995-09-13 Melting furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07234896A JP3096623B2 (en) 1995-09-13 1995-09-13 Melting furnace

Publications (2)

Publication Number Publication Date
JPH0979532A JPH0979532A (en) 1997-03-28
JP3096623B2 true JP3096623B2 (en) 2000-10-10

Family

ID=16978008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP07234896A Expired - Fee Related JP3096623B2 (en) 1995-09-13 1995-09-13 Melting furnace

Country Status (1)

Country Link
JP (1) JP3096623B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3558504B2 (en) * 1997-09-10 2004-08-25 株式会社クボタ Combustion material supply method for incinerator
JP5783078B2 (en) * 2012-02-10 2015-09-24 Jfeエンジニアリング株式会社 Waste gasification melting furnace clinker destruction and suppression device

Also Published As

Publication number Publication date
JPH0979532A (en) 1997-03-28

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