JPH06159643A - Furnace pressure controller for municipal refuse incinerated ash melting furnace - Google Patents
Furnace pressure controller for municipal refuse incinerated ash melting furnaceInfo
- Publication number
- JPH06159643A JPH06159643A JP33564892A JP33564892A JPH06159643A JP H06159643 A JPH06159643 A JP H06159643A JP 33564892 A JP33564892 A JP 33564892A JP 33564892 A JP33564892 A JP 33564892A JP H06159643 A JPH06159643 A JP H06159643A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- exhaust gas
- atmosphere
- duct
- outlet
- 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
- 238000002844 melting Methods 0.000 title claims description 31
- 230000008018 melting Effects 0.000 title claims description 31
- 239000000428 dust Substances 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 79
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 239000002893 slag Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 6
- 238000004056 waste incineration Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 1
- 239000003546 flue gas Substances 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000010813 municipal solid waste Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000001294 propane Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Incineration Of Waste (AREA)
- Gasification And Melting Of Waste (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、都市ごみ焼却灰を溶
融するための密閉炉タイプの電気炉式焼却灰溶融炉の炉
内圧制御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 a furnace pressure control device for an electric furnace type incinerator ash melting furnace of a closed furnace type for melting municipal waste incinerator ash.
【０００２】[0002]
【従来の技術】都市ごみ焼却灰を溶融するための溶融炉
として、従来から、表面溶融炉、電気溶融炉（アーク
炉）、プラズマアーク炉、コークスベッド炉等数多くの
装置が開発されている。上記溶融炉については説明しな
いが、それぞれに種々の問題点を有している。2. Description of the Related Art As a melting furnace for melting municipal waste incineration ash, many apparatuses such as a surface melting furnace, an electric melting furnace (arc furnace), a plasma arc furnace, and a coke bed furnace have been developed. Although the melting furnace is not described, each has various problems.
【０００３】発明者等は、より効率のよい操業を実施す
ることができる都市ごみ焼却灰の溶融炉として、ジュー
ル熱を利用した電気溶融炉を開発した。図４はジュール
熱を利用した密閉炉タイプの電気炉式の都市ごみ焼却灰
溶融炉の１例を示す一部断面系統図である。図４に示す
ように、密閉炉タイプの電気炉式の都市ごみ焼却灰溶融
炉（以下、「灰溶融炉」という）１の炉本体２内に電極
３を上下動自在に設け、電極３を焼却灰層４および溶融
スラグ層５内に、特に電極３の先端を溶融スラグ層５内
に挿入し、ジュール熱によって焼却灰を溶融して溶融ス
ラグおよび溶融メタルに液化する。The inventors have developed an electric melting furnace using Joule heat as a melting furnace for municipal waste incineration ash that can be operated more efficiently. FIG. 4 is a partial cross-sectional system diagram showing an example of an electric furnace type municipal waste incinerator ash melting furnace of a closed furnace type using Joule heat. As shown in FIG. 4, an electrode 3 is provided in a furnace body 2 of a closed furnace type electric furnace type municipal solid waste incineration ash melting furnace (hereinafter referred to as “ash melting furnace”) 1 so as to be vertically movable, and the electrode 3 is installed. The incineration ash layer 4 and the molten slag layer 5, especially the tip of the electrode 3 is inserted into the molten slag layer 5, and the incinerator ash is melted by Joule heat and liquefied into molten slag and molten metal.
【０００４】図４に示す灰溶融炉によって都市ごみ焼却
灰を溶融処理すると、焼却処理の過程で残っていた未燃
分が分解し、可燃性ガスを発生する。この可燃性ガス中
のCOガス量は、酸素を供給しない状態では40％以上にも
達する。When the incineration ash of municipal solid waste is melted by the ash melting furnace shown in FIG. 4, the unburned components remaining in the process of incineration are decomposed to generate combustible gas. The amount of CO gas in this flammable gas reaches 40% or more when oxygen is not supplied.
【０００５】灰溶融炉には可燃性ガスを処理する方法に
よって２つのタイプがある。１つは、炉内に積極的に空
気を取り入れ、炉内で燃焼処理する開放炉タイプであ
る。もう１つは、炉内に極力空気が流入しない構造と
し、可燃性ガスを炉外で燃焼処理する密閉炉タイプであ
る。There are two types of ash melting furnaces, depending on the method of treating the flammable gas. One is an open furnace type in which air is positively introduced into the furnace to perform combustion processing in the furnace. The other is a closed furnace type, which has a structure in which air does not flow into the furnace as much as possible and burns combustible gas outside the furnace.
【０００６】電気炉は電極としてカーボンを使用するた
め、炉内に積極的に空気を取り入れる開放炉タイプの灰
溶融炉では、電極が酸化により消耗し、電極の消費量が
多くなる。この開放炉タイプの灰溶融炉において、電極
の消耗は原理的なものでありこれを解消することは困難
である。Since an electric furnace uses carbon as an electrode, in an open furnace type ash melting furnace in which air is positively introduced into the furnace, the electrode is consumed by oxidation and the consumption of the electrode increases. In this open furnace type ash melting furnace, the consumption of electrodes is a principle and it is difficult to eliminate this.
【０００７】これに対して、密閉炉タイプの灰溶融炉で
は、可燃性ガスを電極など発火源がある容器の中で取り
扱うため、炉内圧が変動し、炉内圧がマイナス（−）側
に大きく振れた場合は、空気が一時期に炉内に流入し、
CO爆発を起こす。また、溶融炉のシール性能以上にプラ
ス（＋）側に大きく振れた場合は、COガスが炉外にリー
クし（漏れ）、作業環境を悪化させる。従って、密閉炉
タイプの灰溶融炉においては、炉内圧を厳密にコントロ
ールすることが必要である。このように、密閉炉タイプ
の灰溶融炉の場合は炉内圧制御が課題であるが、これは
技術の問題として解決の可能性がある。On the other hand, in the closed furnace type ash melting furnace, since the combustible gas is handled in a container having an ignition source such as an electrode, the furnace pressure fluctuates, and the furnace pressure greatly increases to the minus (-) side. If it shakes, air will flow into the furnace for a period of time,
Causes a CO explosion. Also, if the positive swing (+) exceeds the sealing performance of the melting furnace, the CO gas leaks out of the furnace and deteriorates the working environment. Therefore, in the closed furnace type ash melting furnace, it is necessary to strictly control the furnace pressure. As described above, in the case of the closed furnace type ash melting furnace, controlling the furnace pressure is a problem, but this may be solved as a technical problem.
【０００８】発明者等は密閉炉タイプの灰溶融炉におい
て、単純な構成で、容易且つ確実に炉内圧制御が行える
装置について検討した。図４の密閉炉タイプの灰溶融炉
には、従来のフェロアウェイ用電気炉に使用されている
炉内圧制御装置と同一の構成とした炉内圧制御装置が示
されている。[0008] The inventors have examined an apparatus in a closed furnace type ash melting furnace which has a simple structure and can easily and surely control the furnace pressure. The closed furnace type ash melting furnace of FIG. 4 shows a furnace internal pressure control device having the same structure as the furnace internal pressure control device used in the conventional electric furnace for the follow-away.
【０００９】図４に示すように、灰溶融炉１の炉本体２
の排ガスダクト16の途中には、集塵機17および送風機18
が設けられている。送風機18の下流の排ガスダクト16の
途中から戻し導管16a が分岐し、集塵機17の上流の排ガ
スダクト16の途中に接続されている。戻し導管16a の途
中には風量制御のためのダンパ19が設けられている。As shown in FIG. 4, the furnace body 2 of the ash melting furnace 1
In the middle of the exhaust gas duct 16 of the dust collector 17 and the blower 18
Is provided. A return conduit 16a branches from the exhaust gas duct 16 downstream of the blower 18 and is connected to the exhaust gas duct 16 upstream of the dust collector 17. A damper 19 for controlling the air volume is provided in the middle of the return conduit 16a.
【００１０】上記装置においては、集塵機17を介して発
生ガスを送風機18によって吸引し、燃焼塔20によって排
ガス中の可燃性ガスを燃焼させて排出処理が行なわれ
る。21は炎を示す。炉内圧制御は、発生した排ガスの一
部を送風機18（集塵機17）の吸引側に戻すことにより行
なう。即ち、炉本体２内の炉内圧を測定し、炉内圧と発
生ガス量を連動し、ダンパ19の開度コントロールにより
吸引側に戻す量を制御して炉内圧を所定の数値にコント
ロールすること（PIC 制御）により実施している（以
下、「先行技術」という）。In the above apparatus, the generated gas is sucked by the blower 18 through the dust collector 17, and the combustible gas in the exhaust gas is burned by the combustion tower 20 to perform the discharge process. 21 indicates a flame. The furnace pressure control is performed by returning a part of the generated exhaust gas to the suction side of the blower 18 (dust collector 17). That is, the furnace pressure in the furnace body 2 is measured, the furnace pressure and the amount of generated gas are interlocked, and the amount of gas returned to the suction side is controlled by controlling the opening degree of the damper 19 to control the furnace pressure to a predetermined value ( PIC control) (hereinafter referred to as "prior art").
【００１１】[0011]
【発明が解決しようとする課題】しかしながら、先行技
術においては、炉内圧と連動された微妙なダンパコント
ロールが必要であり、炉内圧が（＋）側または（−）側
に振れる確率が高く、上記のように炉内圧不良によるCO
爆発、COガスの炉外へのリーク等が発生する可能性があ
る。また、先行技術においては、排ガス冷却を兼務する
湿式の集塵機および可燃性ガスを燃焼させるための燃焼
塔を備えるため設備投資費用が大である。However, in the prior art, a delicate damper control interlocked with the furnace pressure is required, and the furnace pressure has a high probability of swinging to the (+) side or the (-) side. CO due to defective pressure inside the furnace
There is a possibility of explosion and CO gas leakage outside the furnace. Further, in the prior art, since the wet dust collector also serving as the exhaust gas cooling and the combustion tower for burning the combustible gas are provided, the capital investment cost is large.
【００１２】従って、この発明の目的は、単純な構成
で、容易且つ確実に炉内圧を適正値に制御することがで
きる、密閉炉タイプの都市ごみ焼却灰溶融炉の炉内圧制
御装置を提供することにある。Accordingly, an object of the present invention is to provide a furnace pressure control device for a closed furnace type municipal solid waste incinerator ash melting furnace which has a simple structure and can easily and reliably control the furnace pressure to an appropriate value. Especially.
【００１３】[0013]
【課題を解決するための手段】発明者等は上述の課題を
解決するために鋭意研究を重ねた。その結果、排ガスを
一度大気に開放し、しかるのちに、大気とともに吸引し
排出処理すれば、炉内圧を大気圧と同様の値に安定して
保持できることを知見した。Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above problems. As a result, it was found that if the exhaust gas is once released to the atmosphere and then suctioned and discharged together with the atmosphere, the internal pressure of the furnace can be stably maintained at the same value as the atmospheric pressure.
【００１４】この発明は上述の知見に基づいてなされた
ものであり、炉内に電極を設け、前記電極を焼却灰層お
よび溶融スラグ層内に挿入し、ジュール熱によって焼却
灰を溶融して溶融スラグおよび溶融メタルに液化する密
閉炉タイプの電気炉式都市ごみ焼却灰溶融炉の炉内圧制
御装置であって、前記炉に取り付けられ出口が大気に開
放されている排ガスダクトと、前記排ガスダクトの出口
から放出される排ガス中の可燃性ガスを燃焼するための
燃焼機構と、前記排ガスダクトの出口付近に入口が設け
られた二次ダクトと、前記二次ダクトの途中に設けられ
た、集塵機および送風機と、前記二次ダクトの出口に設
けられた煙突とを備え、前記排ガスダクトの出口から排
ガスを大気に開放して前記炉の炉内圧をほぼ大気圧に制
御し、前記排ガス中の可燃性ガスを前記燃焼機構により
燃焼し、大気中に放出された前記排ガスを前記集塵機を
介して前記送風機によって大気とともに混合吸引するこ
とに特徴を有するものである。The present invention has been made on the basis of the above findings. An electrode is provided in a furnace, the electrode is inserted into an incineration ash layer and a molten slag layer, and the incineration ash is melted and melted by Joule heat. A furnace pressure control device for an electric furnace type municipal solid waste incinerator ash melting furnace that liquefies into slag and molten metal, the exhaust gas duct being attached to the furnace and having an outlet open to the atmosphere, and the exhaust gas duct A combustion mechanism for burning a combustible gas in the exhaust gas discharged from the outlet, a secondary duct provided with an inlet near the outlet of the exhaust gas duct, and a dust collector provided in the middle of the secondary duct, and A blower and a chimney provided at the outlet of the secondary duct are provided, the exhaust gas is released from the outlet of the exhaust gas duct to the atmosphere, and the furnace pressure of the furnace is controlled to about atmospheric pressure, and the exhaust gas is discharged. Burning of the combustible gas by the combustion mechanism, and it has the characteristics that the mixing suction with the atmosphere by the exhaust gas emitted into the atmosphere the blower through the dust collector.
【００１５】[0015]
【作用】排ガスダクトの出口から排ガスを大気に開放す
ることにより炉内圧がほぼ大気圧に保持される。排ガス
と大気との混合ガスを送風機により二次吸引する。排ガ
スダクトの出口から排ガスを大気中に放出しながら、排
ガス中の可燃性ガスを燃焼機構により燃焼することによ
り、発生ガスの可燃分が燃焼処理される。炉内発生ガス
の変化への対応は、炉から発生する排ガスをその２倍以
上の量の大気と混合吸引することにより行なう。送風機
とダンパとの不安定要素により炉内圧が変動することに
対しては、炉からの排ガスダクトを一度大気開放するこ
とによって対応する。[Function] By opening the exhaust gas to the atmosphere from the outlet of the exhaust gas duct, the internal pressure of the furnace is maintained at about atmospheric pressure. A mixed gas of exhaust gas and the atmosphere is secondarily sucked by a blower. The combustible gas in the exhaust gas is burned by the combustion mechanism while the exhaust gas is discharged into the atmosphere from the outlet of the exhaust gas duct, whereby the combustible content of the generated gas is burned. To cope with changes in the gas generated in the furnace, the exhaust gas generated from the furnace is mixed and sucked with the atmosphere in an amount twice or more that of the exhaust gas. The fluctuation of the furnace pressure due to the unstable elements of the blower and the damper is dealt with by once opening the exhaust gas duct from the furnace to the atmosphere.
【００１６】[0016]
【実施例】次に、この発明を図面を参照しながら説明す
る。図１はこの発明の炉内圧制御装置の１実施態様を示
す一部断面系統図、図２は排ガスダクトの出口付近を示
す一部断面概略説明図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional system diagram showing one embodiment of the reactor internal pressure control device of the present invention, and FIG. 2 is a partial cross-sectional schematic explanatory diagram showing the vicinity of the outlet of an exhaust gas duct.
【００１７】図１に示すように、密閉炉タイプの灰溶融
炉１の炉本体２内には上下動自在に電極３が設けられて
いる。電極３を焼却灰層４および溶融スラグ層５内に、
特に電極３の先端を溶融スラグ層５内に挿入し、ジュー
ル熱によって焼却灰を溶融して、溶融スラグおよび溶融
メタルに液化する。14は焼却灰を炉本体内に挿入するた
めのホッパー、６は溶融メタル層である。As shown in FIG. 1, an electrode 3 is provided in a furnace body 2 of a closed furnace type ash melting furnace 1 so as to be vertically movable. The electrode 3 is placed in the incineration ash layer 4 and the molten slag layer 5,
In particular, the tip of the electrode 3 is inserted into the molten slag layer 5, the incinerator ash is melted by Joule heat, and liquefied into molten slag and molten metal. 14 is a hopper for inserting incinerated ash into the furnace body, and 6 is a molten metal layer.
【００１８】炉本体２の上方には、排ガスダクト７が取
り付けられている。排ガスダクト７の出口7aは大気に開
放されている。図２に示すように、排ガスダクト７の途
中には、ダンパ13が設けられている。An exhaust gas duct 7 is attached above the furnace body 2. The outlet 7a of the exhaust gas duct 7 is open to the atmosphere. As shown in FIG. 2, a damper 13 is provided in the middle of the exhaust gas duct 7.
【００１９】出口7aのやや上方には、燃焼機構８として
のプロパンガスボンベ8aの点火バーナ8bが設けられてい
る。点火バーナ8bから噴出するプロパンガスの燃焼によ
って、出口7aから放出される排ガス中の可燃性ガスを燃
焼する。15は炎を示す。An ignition burner 8b of a propane gas cylinder 8a as a combustion mechanism 8 is provided slightly above the outlet 7a. Combustible gas in the exhaust gas discharged from the outlet 7a is burned by burning the propane gas ejected from the ignition burner 8b. 15 indicates a flame.
【００２０】点火バーナ8bのやや上方には、二次ダクト
９の入口9aが設けられている。入り口9aは出口7aから放
出された排ガスおよび大気（二次吸引空気）を吸引しや
すいように傘状に開いている。二次ダクト９の途中には
集塵機10が設けられている。大気により排ガスが冷却さ
れるため、集塵機10は乾式のものを使用できる。集塵機
10の下流の二次ダクト９の途中には送風機11が設けられ
ている。更に、二次ダクト９の出口には煙突12が設けら
れている。送風機11は二次ダクト９の入口9aから排ガス
および二次吸引空気を吸引し、煙突12から排出する。An inlet 9a of the secondary duct 9 is provided slightly above the ignition burner 8b. The inlet 9a is opened like an umbrella so that the exhaust gas and the atmosphere (secondary suction air) emitted from the outlet 7a can be easily sucked. A dust collector 10 is provided in the middle of the secondary duct 9. Since the exhaust gas is cooled by the atmosphere, the dust collector 10 can be a dry type. Dust collector
A blower 11 is provided in the middle of the secondary duct 9 downstream of 10. Furthermore, a chimney 12 is provided at the outlet of the secondary duct 9. The blower 11 sucks the exhaust gas and the secondary suction air from the inlet 9a of the secondary duct 9 and discharges it from the chimney 12.
【００２１】本実施例における、炉内圧制御を説明す
る。排ガスダクト７の出口7aから排ガスを大気中に放出
しながら、排ガス中の可燃性ガスを燃焼機構８により燃
焼する。次いで、大気中に放出された排ガスを集塵機10
を介して送風機11によってその２倍以上の量の大気とと
もに混合吸引し、煙突12から排出処理する。排ガスダク
ト７の出口7aからの排ガス放出量の調整は、焼却灰の投
入量等に応じて、ダンパ13の開度を数段階で固定制御す
ることにより行なうが、図４に示すPIC 制御のような厳
密な精度を必要としない。The furnace pressure control in this embodiment will be described. The combustible gas in the exhaust gas is burned by the combustion mechanism 8 while discharging the exhaust gas into the atmosphere from the outlet 7a of the exhaust gas duct 7. Then, the exhaust gas emitted into the atmosphere is collected by the dust collector 10
The air is mixed and sucked by the blower 11 together with the amount of air more than twice as much as that of the air, and is discharged from the chimney 12. The amount of exhaust gas discharged from the outlet 7a of the exhaust gas duct 7 is adjusted by fixedly controlling the opening degree of the damper 13 in several stages according to the amount of incinerated ash input, etc. Does not require strict precision.
【００２２】図３は本実施例により炉内圧制御を行なっ
た場合の炉内圧の変動を測定した結果を示すグラフであ
る。排ガスは排ガスダクト７の出口7aから一度大気に放
出された後、大気と排ガスとが送風機11によって混合吸
引され、図３に示すように、炉内圧は約20分間の実施の
間、 (＋)10mmAq 〜 (±) ０mmAqの範囲内を外れること
はなく、とりわけ (＋) １mmAq前後で安定している。ま
た、大気開放する密閉炉の構造上炉内圧が（−）側に振
れることはない。FIG. 3 is a graph showing the results of measuring fluctuations in the furnace pressure when controlling the furnace pressure according to this embodiment. After the exhaust gas is once discharged to the atmosphere from the outlet 7a of the exhaust gas duct 7, the atmosphere and the exhaust gas are mixed and sucked by the blower 11, and as shown in FIG. 3, the internal pressure of the furnace is (+) during about 20 minutes. It does not deviate from the range of 10mmAq to (±) 0mmAq, and is stable around (+) 1mmAq. Further, the internal pressure of the closed furnace, which is open to the atmosphere, does not swing toward the (-) side.
【００２３】[0023]
【発明の効果】以上説明したように、この発明によれ
ば、以下のような工業上有用な効果がもたらされる。 炉内圧を常に適正値に保持することができる。 炉近傍の環境集塵空気を、二次吸引空気と兼用でき
るため、設備容量を下げることができる。また、二次吸
引空気により排ガスを混合冷却できるため、冷却設備が
不要となる。 炉からの排ガスダクトを大気開放している部分で、
発生ガスを可燃分を燃焼処理できるため、燃焼設備（燃
焼塔）を省略できる。 炉内圧と連動させた微妙なダンパコントロールが不
要なので、精度の高いダンパ開度制御機構が不要であ
り、ダンパの機構が単純化できる。As described above, according to the present invention, the following industrially useful effects are brought about. The furnace pressure can always be maintained at an appropriate value. Since the environmental dust collection air near the furnace can also be used as the secondary suction air, the equipment capacity can be reduced. Moreover, since the exhaust gas can be mixed and cooled by the secondary suction air, no cooling equipment is required. In the part where the exhaust gas duct from the furnace is open to the atmosphere,
Since the generated gas can be combustible, the combustion equipment (combustion tower) can be omitted. Since a delicate damper control linked to the furnace pressure is not required, a highly accurate damper opening control mechanism is not required, and the damper mechanism can be simplified.
【図１】この発明の都市ごみ焼却灰溶融炉の炉内圧制御
装置の１実施態様を示す一部断面系統図FIG. 1 is a partial cross-sectional system diagram showing one embodiment of a furnace pressure control device for an incinerator ash melting furnace for municipal waste according to the present invention.
【図２】排ガスダクトの出口付近を示す一部断面概略説
明図FIG. 2 is a partial cross-sectional schematic explanatory view showing the vicinity of the outlet of the exhaust gas duct.
【図３】本実施例により炉内圧制御を行なった場合の炉
内圧の変動を測定した結果を示すグラフFIG. 3 is a graph showing the results of measuring fluctuations in the furnace pressure when controlling the furnace pressure according to the present embodiment.
【図４】従来の炉内圧制御装置の１例を示す一部断面系
統図。FIG. 4 is a partial cross-sectional system diagram showing an example of a conventional furnace pressure control device.
１ 密閉炉タイプの電気炉式の都市ごみ焼却灰溶融炉 ２ 炉本体 ３ 電極 ４ 焼却灰層 ５ 溶融スラグ層 ６ 溶融メタル層 ７ 排ガスダクト 7a 出口 ８ 燃焼機構 8a プロパンガスボンベ 8b 点火バーナ ９ 二次ダクト 9a 入口 10 集塵機 11 送風機 12 煙突 13 ダンパ 14 ホッパー 15 炎 16 排ガスダクト 16a 戻し導管 17 集塵機 18 送風機 19 ダンパ 20 燃焼塔 21 炎。 1 Electric furnace type municipal waste incineration ash melting furnace of closed furnace type 2 Furnace body 3 Electrode 4 Incineration ash layer 5 Molten slag layer 6 Molten metal layer 7 Exhaust gas duct 7a Exit 8 Combustion mechanism 8a Propane gas cylinder 8b Ignition burner 9 Secondary duct 9a Inlet 10 Dust collector 11 Blower 12 Chimney 13 Damper 14 Hopper 15 Flame 16 Exhaust duct 16a Return conduit 17 Dust collector 18 Blower 19 Damper 20 Combustion tower 21 Flame.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山岸 一雄 神奈川県横浜市緑区鴨居５−９−26 (72)発明者 西村 研一 新潟県糸魚川市一の宮５−７−12 (72)発明者 山下 恒男 新潟県糸魚川市上刈１−１−７ ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Yamagishi 5-9-26 Kamoi, Midori-ku, Yokohama, Kanagawa Prefecture (72) Kenichi Nishimura 5-7-12 Ichinomiya, Itoigawa City, Niigata Prefecture (72) Tsuneo Yamashita 1-1-7 Kamigari, Itoigawa City, Niigata Prefecture
Claims (1)
および溶融スラグ層内に挿入し、ジュール熱によって焼
却灰を溶融して溶融スラグおよび溶融メタルに液化する
密閉炉タイプの電気炉式都市ごみ焼却灰溶融炉の炉内圧
制御装置であって、 前記炉に取り付けられ出口が大気に開放されている排ガ
スダクトと、前記排ガスダクトの出口から放出される排
ガス中の可燃性ガスを燃焼するための燃焼機構と、前記
排ガスダクトの出口付近に入口が設けられた二次ダクト
と、前記二次ダクトの途中に設けられた、集塵機および
送風機と、前記二次ダクトの出口に設けられた煙突とを
備え、前記排ガスダクトの出口から排ガスを大気に開放
して前記炉の炉内圧をほぼ大気圧に制御し、前記排ガス
中の可燃性ガスを前記燃焼機構により燃焼し、大気中に
放出された前記排ガスを前記集塵機を介して前記送風機
によって大気とともに混合吸引することを特徴とする都
市ごみ焼却灰溶融炉の炉内圧制御装置。1. An electric furnace of a closed furnace type in which an electrode is provided in a furnace, the electrode is inserted into an incineration ash layer and a molten slag layer, and the incinerator ash is melted by Joule heat to be liquefied into molten slag and molten metal. A furnace pressure control device for a type municipal waste incinerator ash melting furnace, comprising: an exhaust gas duct attached to the furnace, the outlet of which is open to the atmosphere; and a combustible gas in the exhaust gas discharged from the outlet of the exhaust gas duct. A combustion mechanism for controlling, a secondary duct having an inlet provided near the outlet of the exhaust gas duct, a dust collector and a blower provided in the middle of the secondary duct, and an outlet of the secondary duct. A chimney is provided, the exhaust gas is released from the outlet of the exhaust gas duct to the atmosphere, the furnace pressure of the furnace is controlled to about atmospheric pressure, and the combustible gas in the exhaust gas is burned by the combustion mechanism, Furnace pressure control device for municipal waste incineration ash melting furnace, which comprises mixing aspirated with air to released the flue gas by the blower through the dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4335648A JP2774425B2 (en) | 1992-11-20 | 1992-11-20 | Furnace pressure control device of incineration ash melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4335648A JP2774425B2 (en) | 1992-11-20 | 1992-11-20 | Furnace pressure control device of incineration ash melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06159643A true JPH06159643A (en) | 1994-06-07 |
| JP2774425B2 JP2774425B2 (en) | 1998-07-09 |
Family
ID=18290954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4335648A Expired - Lifetime JP2774425B2 (en) | 1992-11-20 | 1992-11-20 | Furnace pressure control device of incineration ash melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2774425B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6274020A (en) * | 1985-09-27 | 1987-04-04 | Mitsubishi Heavy Ind Ltd | Device for controlling gas discharge rate of continuous steel making furnace |
-
1992
- 1992-11-20 JP JP4335648A patent/JP2774425B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6274020A (en) * | 1985-09-27 | 1987-04-04 | Mitsubishi Heavy Ind Ltd | Device for controlling gas discharge rate of continuous steel making furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2774425B2 (en) | 1998-07-09 |
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