JPH0337090B2 - - Google Patents
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- Publication number
- JPH0337090B2 JPH0337090B2 JP62164831A JP16483187A JPH0337090B2 JP H0337090 B2 JPH0337090 B2 JP H0337090B2 JP 62164831 A JP62164831 A JP 62164831A JP 16483187 A JP16483187 A JP 16483187A JP H0337090 B2 JPH0337090 B2 JP H0337090B2
- Authority
- JP
- Japan
- Prior art keywords
- waste
- garbage
- combustion chamber
- temperature
- combustion
- 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 - Lifetime
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- 238000002485 combustion reaction Methods 0.000 claims description 89
- 239000002699 waste material Substances 0.000 claims description 75
- 239000010813 municipal solid waste Substances 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims 2
- 239000007789 gas Substances 0.000 description 11
- 150000002013 dioxins Chemical class 0.000 description 9
- 239000010410 layer Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 2
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000013502 plastic waste Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000010849 combustible waste Substances 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、都市ごみ等の焼却処理に利用される
ものであり、生活ごみ等の一般ごみとプラスチツ
ク系の高カロリーごみとを一緒に、ダイオキシン
等の有害物質の発生を抑制しつつ、連続的に高能
率で焼却できるようにしたごみ焼却方法と、これ
に使用するごみ焼却炉に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention is used for the incineration treatment of municipal waste, etc., in which general waste such as household waste and high-calorie plastic waste are combined together. The present invention relates to a garbage incineration method that enables continuous and highly efficient incineration while suppressing the generation of harmful substances such as dioxins, and a garbage incinerator used in the method.
（従前の技術）
都市ごみ等の焼却炉は、通常第５図に示す如
く、ごみ貯留ピツト１に貯えられたごみＡを、バ
ケツトクレーン２でホツパー３内へ投入し、ごみ
供給フイーダ４により定量づつ焼却炉Ｂ内へ送入
すると共に、乾燥ストーカ５、燃焼ストーカ６及
び後燃焼ストーカ７等より構成したストーカ燃焼
装置Ｓで完全に燃焼させたあと、灰押出装置８に
より燃焼灰Ｃを灰出コンベア９上へ排出するよう
構成されており、燃焼ガスＤは燃焼室１０、排ガ
スボイラ本体１１、エコノマイザー１２、電気集
塵装置１３及び有害ガス処理装置１４等を通して
大気中へ放出されて行く。(Previous technology) As shown in FIG. 5, in incinerators for municipal waste, etc., garbage A stored in a garbage storage pit 1 is normally charged into a hopper 3 by a bucket crane 2, and then transported by a garbage feeder 4. The combustion ash C is fed into the incinerator B in fixed quantities and completely combusted in the stoker combustion device S, which is composed of a drying stoker 5, a combustion stoker 6, an after-combustion stoker 7, etc., and then converted into ash by the ash extrusion device 8. The combustion gas D is discharged onto an output conveyor 9, and the combustion gas D is discharged into the atmosphere through a combustion chamber 10, an exhaust gas boiler main body 11, an economizer 12, an electrostatic precipitator 13, a harmful gas treatment device 14, etc. .
而して、最近のごみ焼却炉は、燃焼効率や排ガ
ス内の有害物質の除去率等では極めて優れた設備
になつており、例えばストーカ式焼却炉に於いて
は、灰内の未燃物量は約２％以下、排ガス内の煤
塵量は約0.02ｇｒ／Ｎm3以下にまで夫々引下げら
れており、又、NOx、HCl、SOx等の有害ガス
の発生量も極く微量で、極めて衛生的な焼却処理
が可能になつて来ている。 Recently, garbage incinerators have become extremely superior in terms of combustion efficiency and removal rate of harmful substances in exhaust gas. For example, in a stoker-type incinerator, the amount of unburned materials in the ash is The amount of soot and dust in the exhaust gas has been reduced to about 2% or less, and the amount of soot and dust in the exhaust gas has been reduced to about 0.02gr/ Nm3 or less, and the amount of harmful gases such as NOx, HCl, and SOx generated is extremely small, making it extremely hygienic. Incineration is becoming possible.
しかし乍ら、生活様式等の変化から、近年排出
されてくる都市ごみ等の性質も大きく変化し、そ
れに伴つて、ごみ焼却炉の燃焼排ガス内からも新
たな有害物質が次々に発見され、大きな問題を引
き起している。その中でも、ダイオキシンや水銀
等の排出が最大の問題となつており、特に、ダイ
オキシンは、分別回収されたプラスチツク系の高
カロリーごみや、破砕プラント等からの可燃性ご
み（プラスチツク成分の多い高カロリーごみ）等
を焼却した場合に発生し易く、これを抑制するこ
とが斯界の急務とされている。 However, due to changes in lifestyles, the nature of municipal waste discharged in recent years has changed significantly, and along with this, new harmful substances have been discovered one after another in the combustion exhaust gas of waste incinerators, causing a large is causing problems. Among these, the emissions of dioxins, mercury, etc. are the biggest problem.In particular, dioxins are caused by high-calorie plastic waste that has been separated and collected, as well as combustible waste (high-calorie waste with a large amount of plastic) from shredding plants, etc. This is likely to occur when incinerating garbage, etc., and it is an urgent task for the industry to suppress this.
ところで、一般にごみ焼却炉に於いては、ごみ
を余り高温で燃焼させると燃焼ストーカ上で所謂
クリンカーが発生し、焼却炉側壁へのクリンカー
の付着やクリンカーによるストーカの通気性悪化
等によつて、ごみの連続的な焼却が困難となる。
また、ごみの燃焼温度が約950℃を越えると、
NOxの発生量が著しく増加してくる。その結果、
従前のごみ焼却炉では、煙道から引いた再循環ガ
スを燃焼ストーカの下方より供給する燃焼用空気
内へ混合し、低O2による所謂ごみの抑制燃焼を
行なつたり、或いは、新鮮空気を炉内へ吹込んで
炉内燃焼温度を所定温度（約950℃）以下に保持
したりして、クリンカーの発生防止やNOx発生
量の低減を図つている。 By the way, in general, in garbage incinerators, if garbage is burned at too high a temperature, so-called clinker will be generated on the combustion stoker, and the clinker will adhere to the side wall of the incinerator and the ventilation of the stoker will deteriorate due to the clinker. Continuous incineration of waste becomes difficult.
In addition, when the combustion temperature of garbage exceeds approximately 950℃,
The amount of NOx generated increases significantly. the result,
In conventional garbage incinerators, the recirculated gas drawn from the flue is mixed with the combustion air supplied from below the combustion stoker to perform so-called suppressed combustion of garbage with low O2 , or to generate fresh air. It is blown into the furnace to maintain the combustion temperature within the furnace below a predetermined temperature (approximately 950 degrees Celsius) in order to prevent clinker generation and reduce the amount of NOx generated.
これに対して、プラスチツク系成分の高い高カ
ロリーごみを焼却した際に発生するダイオキシン
は、高カロリーごみを1000°〜1100℃程度の温度
下で高温燃焼させることにより、極めて有効に抑
制することが可能であるが、前述の如く、燃焼温
度の引下げを必要とする前記クリンカーの発生防
止策やNOxの低減策とは逆行するものであり、
この点に様々な問題が内存する。 On the other hand, dioxins generated when high-calorie waste with high plastic components are incinerated can be extremely effectively suppressed by burning the high-calorie waste at a high temperature of about 1000° to 1100°C. Although this is possible, as mentioned above, it is contrary to the measures to prevent clinker generation and reduce NOx, which require lowering the combustion temperature.
There are various problems in this respect.
（発明が解決しようとする問題点）
即ち、従前のごみ焼却炉に於いては、排ガスの
低NOx化やクリンカーの発生を防止する必要上、
焼却炉内のごみ燃焼温度を一定値以下に保持した
り、ごみを還元燃焼させるようにしているが、こ
れ等の場合には、何れもごみの燃焼温度が相対的
に低くくなり、ダイオキシンの発生を有効に防止
できないという難点がある。(Problems to be solved by the invention) In other words, in conventional garbage incinerators, due to the need to reduce NOx in exhaust gas and prevent the generation of clinker,
The garbage combustion temperature in the incinerator is kept below a certain value, or the garbage is reductively combusted, but in both cases, the combustion temperature of the garbage becomes relatively low, causing the formation of dioxins. The problem is that the occurrence cannot be effectively prevented.
本発明は、従前のごみ焼却炉に於ける上述の如
き問題を解決せんとするものであり、プラスチツ
ク成分の多い高カロリーごみと、生活ごみ等の有
機質の多い高カロリーの一般ごみとを、クリンカ
ーを生ずることなく、しかも、NOx等の有害ガ
スやダイオキシンの発生抑制を図りつつ、高効率
で連続焼却できるようにしたごみ焼却方法とごみ
焼却炉を提供するものである。 The present invention aims to solve the above-mentioned problems with conventional waste incinerators. The present invention provides a garbage incineration method and a garbage incinerator that can perform continuous incineration with high efficiency while suppressing the generation of harmful gases such as NOx and dioxins.
（問題点を解決するための手段）
本発明の焼却方法は、一般ごみA1は焼却炉の
ストーカ燃焼装置Ｓ上で燃焼させると共に、高カ
ロリーごみA2は焼却炉の二次燃焼室２０内へ吹
込み、その中の粗いものは前記一般ごみA1の表
層上で燃焼させ、また、細かいものは二次空気Ｅ
により撹拌しつつ浮遊燃焼させて二次燃焼室２０
内に所定温度Ｔの高温燃焼域Ｇを形成し、前記高
カロリーごみA2の吹込量を制御することにより、
前記温度Ｔを所定値に保持することを発明の基本
構成とするものである。(Means for Solving the Problems) In the incineration method of the present invention, the general waste A 1 is burned on the stoker combustion device S of the incinerator, and the high-calorie waste A 2 is burned in the secondary combustion chamber 20 of the incinerator. The coarse waste is combusted on the surface of the general waste A1 , and the fine waste is blown into the secondary air E.
The secondary combustion chamber 20 is created by floating combustion while stirring.
By forming a high-temperature combustion zone G at a predetermined temperature T within the combustion chamber and controlling the amount of high-calorie waste A2 blown into the combustion chamber,
The basic structure of the invention is to maintain the temperature T at a predetermined value.
又、この方法を実施するための本発明の焼却炉
は、一般ごみA1を主に燃焼させるストーカ燃焼
装置Ｓ；該ストーカ燃焼装置Ｓの上方に形成さ
れ、二次空気Ｅがタンゼンシヤル状に吹込まれる
二次燃焼室２０と；高カロリーごみA2を前記二
次燃焼室２０内へ吹込むごみ定量供給装置Ｆと；
前記二次燃焼室２０内の温度を検出する温度検出
器２３と；前記温度検出器２３からの信号により
前記高カロリーごみA2の吹込量を調整する制御
装置２９とを、発明の基本構成とするものであ
る。特に、前記ごみ定量供給装置Ｆは、ごみの安
息角θ以上の傾斜部２５ａを有する箱型のコンベ
アトラフ２５と；該コンベアトラフ２５内に回動
自在に巻回配設したフライトチエーンコンベア２
４と；前記コンベアトラフ傾斜部２５ａの上方に
配設したごみ排出用シユート２７と；ごみを焼却
炉内へ吹込む風力スプレツダー２８とを具備して
なる。 The incinerator of the present invention for carrying out this method includes a stoker combustion device S that mainly burns general waste A1 ; a stoker combustion device S is formed above the stoker combustion device S, and the secondary air E is blown in a tangential manner. a secondary combustion chamber 20 into which high-calorie waste A 2 is introduced; a waste constant supply device F that blows high-calorie waste A 2 into the secondary combustion chamber 20;
The basic configuration of the invention includes a temperature detector 23 that detects the temperature inside the secondary combustion chamber 20; and a control device 29 that adjusts the amount of high-calorie waste A 2 blown in based on a signal from the temperature detector 23. It is something to do. In particular, the waste quantitative supply device F includes a box-shaped conveyor trough 25 having an inclined portion 25a having an angle of repose θ or more of the waste; and a flight chain conveyor 2 rotatably wound inside the conveyor trough 25.
4; a trash discharge chute 27 disposed above the conveyor trough slope 25a; and a wind spreader 28 for blowing trash into the incinerator.
（作用）
比較的カロリーの低い一般ごみA1は、ストー
カ燃焼装置Ｓで燃焼され、燃焼灰Ｃは灰押出装置
８により炉外へ排出されて行く。(Operation) General garbage A 1 having a relatively low calorie content is burned in the stoker combustion device S, and the combustion ash C is discharged to the outside of the furnace by the ash extrusion device 8 .
プラスチツク成分等の多い高カロリーごみA2
は、ごみ定量供給装置Ｆによつて二次燃焼室２０
内へ吹込まれ、微細なものは浮遊燃焼され、また
粗いものは燃焼ストーカ上の一般ごみ層の上に落
ち、その表層部で燃焼する。尚、後者の粗い高カ
ロリーごみは、一般ごみA1の表層部に於いて燃
焼し、且つその量も比較的少ないものであるた
め、ストーカ上にクリンカーが生ずることは全く
ない。 High calorie garbage with a lot of plastic components etc. A 2
is supplied to the secondary combustion chamber 20 by the waste constant supply device F.
The fine particles are blown into the interior and burned in the air, while the coarse particles fall onto the general waste layer on the combustion stoker and are burned on the surface layer. Incidentally, the latter coarse high-calorie waste is burned on the surface layer of the general waste A1 and its amount is relatively small, so no clinker is formed on the stoker.
一方、浮遊状態の高カロリーごみA2は、二次
空気によつて撹拌されつつ空間燃焼をし、二次燃
焼室２０の上部には約1000°〜1100℃位いの高温
燃焼域Ｇが形成される。この高温燃焼域Ｇの存在
により、ごみの燃焼によるダイオキシンの発生が
有効に抑制されることになる。 On the other hand, the floating high-calorie waste A 2 burns in space while being stirred by the secondary air, and a high-temperature combustion zone G of about 1000° to 1100°C is formed in the upper part of the secondary combustion chamber 20. be done. The existence of this high-temperature combustion zone G effectively suppresses the generation of dioxins due to combustion of garbage.
（実施例）
以下、第１図乃至第４図に基づいて、本件各発
明の実施例を説明する。尚、第１図乃至第４図に
於いて、前記第５図（従来例）と共通する部位に
は、同一参照が付されている。(Embodiments) Hereinafter, embodiments of each of the present inventions will be described based on FIGS. 1 to 4. In FIGS. 1 to 4, the same reference numerals are given to parts common to those in FIG. 5 (conventional example).
第１図は、本件発明に係るごみ焼却炉の縦断面
概要図であり、第２図は第１図のイ−イ視断面概
要図である。 FIG. 1 is a schematic vertical cross-sectional view of a waste incinerator according to the present invention, and FIG. 2 is a schematic cross-sectional view taken along the line A--B in FIG.
また、第３図は第２図のロ−ロ視断面概要図、
第４図は第３図のハ−ハ視断面概要図である。 In addition, Fig. 3 is a schematic cross-sectional view of Fig. 2,
FIG. 4 is a schematic cross-sectional view taken along the line H--H in FIG. 3.
ごみ貯留ピツト１は、内部が二区画に区分され
ており、片側の貯留ピツト１ａへは家庭ごみ等の
比較的低カロリーの一般ごみA1が、また、他方
の貯留ピツト１ｂへは、大型ごみの破砕プラント
等から搬入されて来るプラスチツク成分の比較的
多い高カロリーごみA2が、夫々ごみ投入フロア
ー１６及び自動開閉扉１７ａ，１７ｂを通して搬
入され、貯留されている。 The inside of the garbage storage pit 1 is divided into two compartments, with relatively low-calorie general garbage A 1 such as household garbage going into one storage pit 1a, and large garbage into the other storage pit 1b. High-calorie waste A2 containing a relatively large amount of plastic components is carried in from a crushing plant, etc., and is carried in through the garbage input floor 16 and automatic opening/closing doors 17a and 17b, respectively, and stored therein.
ごみ焼却炉Ｂには、一般ごみA1の供給用ポツ
パー３ａと、高カロリーごみA2の供給用ホツパ
ー３ｂとが並設されており、一般ごみA1は、従
前のストーカ燃焼装置Ｓを設けたごみ焼却炉と同
様に、ごみ供給フイーダ４によつて所定量づつ乾
燥ストーカ５上へ送り出され、燃焼ストーカ６及
び後燃焼ストーカ７上で完全に燃焼されたあと、
燃焼灰Ｃは、灰押出装置８及び灰出しコンベア９
を通して外部へ搬出されて行く。 In the garbage incinerator B, a hopper 3a for supplying general garbage A 1 and a hopper 3b for supplying high calorie garbage A 2 are installed side by side. Similar to the waste incinerator, a predetermined amount of waste is fed by the waste feeder 4 onto the drying stoker 5, and after being completely burned on the combustion stoker 6 and post-combustion stoker 7,
The combustion ash C is transferred to an ash extrusion device 8 and an ash removal conveyor 9.
It is carried out to the outside through.
焼却炉本体１８内の前記燃焼ストーカ６の上方
には一次燃焼室１０が形成されており、更にその
上方には二次燃焼室２０が形成されている。この
二次燃焼室２０には、二次空気Ｅの吹込用ノズル
２１が２〜３段に亘つて四隅に対角状に配設され
ており、二次空気Ｅが二次燃焼室２０内へタンゼ
ンシヤル状に吹込まれる。又、二次燃焼室２０の
上部には温度検出器２３が設けられており、後述
する如く、温度検出器２３からの信号によつて高
カロリーごみA2の吹込量等を調整し、高カロリ
ーごみA2の高温燃焼域Ｇの温度が、ダイオキシ
ンを抑制し得る温度Ｔ（1000°〜1100℃）になるよ
う制御する。 A primary combustion chamber 10 is formed above the combustion stoker 6 in the incinerator main body 18, and a secondary combustion chamber 20 is further formed above it. In this secondary combustion chamber 20, nozzles 21 for blowing secondary air E are arranged diagonally at the four corners in two to three stages, and the secondary air E flows into the secondary combustion chamber 20. It is injected in a tangential manner. In addition, a temperature detector 23 is provided in the upper part of the secondary combustion chamber 20, and as described later, the amount of high-calorie waste A2 to be blown is adjusted based on the signal from the temperature detector 23, and the amount of high-calorie waste A2 is adjusted. The temperature of the high-temperature combustion zone G of garbage A2 is controlled to be a temperature T (1000° to 1100°C) that can suppress dioxins.
一方、ピツト１ｂ内の高カロリーごみA2は、
第３図及び第４図に示す如く、バケツトクレーン
２ｂでホツパー３ｂ内へ搬入され、ホツパー３ｂ
の下方に設けたごみ供給フイーダ２２によつて、
ごみ定量供給装置Ｆのフライトチエーンコンベア
２４上へ押出される。 On the other hand, high calorie waste A2 in pit 1b is
As shown in FIGS. 3 and 4, the bucket crane 2b transports the hopper 3b into the hopper 3b.
By the garbage supply feeder 22 installed below the
The waste is extruded onto the flight chain conveyor 24 of the waste quantitative supply device F.
前記ごみ定量供給装置Ｆは、第３図に示す如
く、ごみの安息角θ（約30〜70°）以上の傾斜部２
５ａを有するコンベアトラフ２５内に、フライト
チエーンコンベア２４を矢印方向へ回動自在に巻
回配設すると共に、前記傾斜部２５ａの上方部
に、竪向きのごみ排出用シユート２７を設け、更
に、シユート２７の下方に、ごみを吹き飛ばす風
力スプレツダー２８を配設して構成されており、
前記ごみ排出用シユート２７の下方は、焼却炉本
体１８の二次燃焼室２０の下方部へ連通されてお
り、風力スプレツダー２８によつて二次燃焼室２
０内へ高カロリーごみA2が吹込まれる。 As shown in FIG.
A flight chain conveyor 24 is disposed rotatably in the direction of the arrow in a conveyor trough 25 having a diameter of 5a, and a vertical garbage discharge chute 27 is provided above the inclined portion 25a. It is constructed by disposing a wind spreader 28 below the chute 27 to blow away the garbage.
The lower part of the garbage discharge chute 27 is connected to the lower part of the secondary combustion chamber 20 of the incinerator main body 18, and the secondary combustion chamber 20 is connected to the lower part of the secondary combustion chamber 20 by the wind spreader 28.
High calorie waste A 2 is blown into 0.
即ち、ごみ供給フイーダ２２よりコンベアトラ
フ２５内へ押出された高カロリーごみA2は、回
動するフライトチエーンコンベア２４によつて掬
い上げられ、傾斜部２５ａに於いて余分なごみが
底の方へ崩れ落ち、丁度フライトの高さだけの所
定量のごみが上方へ掻き上げられて行く。この様
にして、傾斜部２５ａの上方へ掻き上げられた高
カロリーごみA2は、前述の通りシユート２７及
び風力スプレツダー２８を介して二次燃焼室２０
内へ吹込まれる。 That is, the high-calorie waste A2 pushed out from the waste feeder 22 into the conveyor trough 25 is scooped up by the rotating flight chain conveyor 24, and the excess waste collapses to the bottom at the inclined portion 25a. , a predetermined amount of dirt, exactly the height of the flight, is raked upward. In this way, the high-calorie waste A 2 scraped up above the inclined portion 25a is transferred to the secondary combustion chamber 20 via the chute 27 and the wind spreader 28 as described above.
It is blown inside.
吹込まれた高カロリーごみA2は、その内の重
いもの（即ち形状の粗いもの）は燃焼ストーカ６
上へ落下し、一般ごみ層A1の表面に於いて燃焼
する。尚、落下した高カロリーごみA2の燃焼は、
一般ごみ層の表面のみに於ける燃焼であるため、
これによつてクリンカーが発生したり、ストーカ
を損傷したり、或いは一次空気の通気性が悪化す
るということは無い。 The injected high-calorie waste A 2 is heavy (i.e. coarse-shaped) and sent to the combustion stoker 6.
It falls upward and burns on the surface of the general garbage layer A1 . Incidentally, the combustion of fallen high-calorie waste A2 is as follows:
Since the combustion occurs only on the surface of the general waste layer,
This does not create clinker, damage the stoker, or impair the permeability of the primary air.
一方、吹込まれた高カロリーごみA2の大部分
（80〜90％）は、二次燃焼室２０内で浮遊燃焼を
し、二次燃焼室２０内へタンゼンシヤルに吹込ま
れた二次空気Ｅによつて、空間燃焼が促進され、
所謂高温燃焼域Ｇが二次燃焼室２０の上部に形成
されて行く。 On the other hand, most of the blown high-calorie waste A2 (80 to 90%) undergoes floating combustion within the secondary combustion chamber 20, and is transferred to the secondary air E tangentially blown into the secondary combustion chamber 20. Therefore, spatial combustion is promoted,
A so-called high temperature combustion zone G is formed in the upper part of the secondary combustion chamber 20.
即ち、燃焼ストーカ６上に於いては、一般ごみ
A1や粗い高カロリーは寧ろ抑制燃焼され、また、
二次燃焼室２０の最下部では還元燃焼が行なわれ
る。更に、二次燃焼室２０の中間部及び上方部で
は、最少の空気量で浮遊ごみの撹拌が行なわれ、
順次高温燃焼が達成される。 That is, on the combustion stoker 6, general garbage
A 1 and coarse high calories are rather suppressed and burned, and
Reductive combustion takes place at the lowest part of the secondary combustion chamber 20. Furthermore, in the middle and upper portions of the secondary combustion chamber 20, floating debris is stirred with a minimum amount of air,
Successively high temperature combustion is achieved.
尚、前記高温燃焼域Ｇの温度Ｔは、温度検出器
２３によつて測定されており、燃焼制御装置
（Ａ・Ｃ・Ｃ制御装置）２９へ前記検出器２３か
らの温度信号を入力することにより、フライトチ
エーンコンベア２４の駆動速度や二次空気供給量
が制御され、これによつて高カロリーごみA2の
燃焼温度が、ダイオキシンの発生を抑制するに適
した温度に制御される。 The temperature T of the high-temperature combustion zone G is measured by a temperature detector 23, and a temperature signal from the detector 23 is input to a combustion control device (A/C/C control device) 29. As a result, the drive speed and secondary air supply amount of the flight chain conveyor 24 are controlled, thereby controlling the combustion temperature of the high-calorie waste A 2 to a temperature suitable for suppressing the generation of dioxins.
又、NOxについては、一次空気量及び二次空
気量を制御することにより、別途にその抑制が図
られることは勿論である。 Furthermore, it goes without saying that NOx can be suppressed separately by controlling the amount of primary air and the amount of secondary air.
（発明の効果）
本発明の焼却方法によれば、一般ごみA1を燃
焼ストーカ６上で燃焼させると共に、高カロリー
ごみA2を二次燃焼室２０内へ吹込み、粗いもの
は一般ごみ層の表層部で、また、軽いものは少量
の二次空気によつて撹拌しつつ、所定の高温下で
空間燃焼させるようにしているため、従前のスト
ーカ式ごみ焼却炉の場合に比較して、ザイオキシ
ンの発生を大幅に抑制することが出来ると共に、
NOxの有効な抑制も併せて行なえる。例えば、
同質のごみを焼却する場合、焼却処理量等の他の
主要条件を同一とすると、本件発明では、ダイオ
キシンの発生濃度が、従前のストーカ式焼却炉の
場合の約５〜20％程度となり、ダイオキシンの発
生を大幅に抑制し得ると共に、NOx等の有害ガ
スを同じレベルに低減できることが確認されてい
る。(Effects of the Invention) According to the incineration method of the present invention, the general waste A 1 is burned on the combustion stoker 6, and the high-calorie waste A 2 is blown into the secondary combustion chamber 20, and coarse waste is stored in the general waste layer. Compared to conventional stoker-type waste incinerators, this method allows lighter items to be burned in space at a predetermined high temperature while being agitated with a small amount of secondary air. In addition to being able to significantly suppress the generation of zaoxin,
Effective suppression of NOx can also be carried out. for example,
When incinerating waste of the same quality, assuming that other main conditions such as the amount of incineration are the same, in the present invention, the concentration of dioxin generated is approximately 5 to 20% of that in the case of a conventional stoker-type incinerator, and the concentration of dioxin It has been confirmed that the generation of NOx and other harmful gases can be significantly reduced to the same level.
また、燃焼ストーカ６上へ落下した粗い高カロ
リーごみA2は、一般ごみ層の表層部のみで燃焼
するうえ、その量も比較的少ないため、燃焼スト
ーカ６上に於けるクリンカーの発生は全く起ら
ず、安定したごみの連続的な焼却運動を行ない得
る。また、本発明の焼却炉によれば、上記焼却方
法を好適に実施することができる。しかも、ごみ
定量供給装置Ｆを、コンベアトラフ２５にごみの
安息角θ以上の勾配を有する傾斜部２５ａを設
け、これに沿つてフライトチエーンコンベアを巻
回回動する構成としているため、フライトの高さ
に応じた所定量のごみを正確にシユート２７の上
方へ掻き上げることが出来る。 In addition, the coarse high-calorie waste A2 that has fallen onto the combustion stoker 6 burns only in the surface layer of the general waste layer, and the amount thereof is relatively small, so clinker generation on the combustion stoker 6 does not occur at all. It is possible to carry out a stable and continuous incineration movement of waste. Moreover, according to the incinerator of the present invention, the above-mentioned incineration method can be carried out suitably. In addition, since the waste quantitative supply device F is configured such that the conveyor trough 25 is provided with an inclined part 25a having a slope greater than the angle of repose θ of the waste, and the flight chain conveyor is wound and rotated along the inclined part 25a, the height of the flight is reduced. It is possible to accurately scrape up a predetermined amount of dirt above the chute 27 according to the amount of dirt.
さらに、ごみ定量供給装置Ｆにおいては、シユ
ート２７を通して自動落下せしめた高カロリーご
みを、その下方に設けたスプレツダー２８によつ
て焼却炉本体１８内へ吹込むようにしているた
め、高カロリーごみA2は、均一に分散された状
態で二次燃焼室２０内へ吹込まれ、ごみの空間燃
焼を行なう上で極めて好都合な吹込状態となる。 Furthermore, in the waste quantitative supply device F, the high-calorie waste that is automatically dropped through the chute 27 is blown into the incinerator main body 18 by the spreader 28 provided below, so that the high-calorie waste A 2 is The waste is blown into the secondary combustion chamber 20 in a uniformly dispersed state, resulting in an extremely convenient blowing state for spatial combustion of waste.
第１図は本発明に係るごみ焼却炉の縦断面概要
図であり、第２図は第１図のイ−イ視断面概要図
である。第３図は、第２図のロ−ロ視断面概要図
であり、第４図は第２図のハ−ハ視断面図であ
る。第５図は、従前のストーカ式ごみ焼却炉の縦
断面概要図である。
A1……一般ごみ、A2……高カロリーごみ、Ｓ
……ストーカ燃焼装置、Ｅ……二次空気、Ｇ……
高温燃焼域、Ｆ……ごみ定量供給装置、Ｔ……設
定温度、６……燃焼ストーカ、１８……焼却炉本
体、２０……二次燃焼室、２１……二次空気吹込
ノズル、２２……高カロリーごみの供給フイー
ダ、２３……温度検出器、２４……フライトチエ
ーンコンベア、２５……コンベアトラフ、２５ａ
……傾斜部、２８……スプレツダー、２９……制
御装置。
FIG. 1 is a schematic vertical cross-sectional view of a waste incinerator according to the present invention, and FIG. 2 is a schematic cross-sectional view taken along the line A--B in FIG. 1. FIG. 3 is a schematic sectional view taken along the line 2 in FIG. 2, and FIG. FIG. 5 is a schematic vertical cross-sectional view of a conventional stoker-type garbage incinerator. A 1 ... General garbage, A 2 ... High calorie garbage, S
...Stoker combustion device, E...Secondary air, G...
High temperature combustion area, F...Garbage constant supply device, T...Set temperature, 6...Combustion stoker, 18...Incinerator main body, 20...Secondary combustion chamber, 21...Secondary air blowing nozzle, 22... ...High calorie waste feeder, 23...Temperature detector, 24...Flight chain conveyor, 25...Conveyor trough, 25a
... Inclined section, 28 ... Spreader, 29 ... Control device.
Claims (1)
上で燃焼させると共に、高カロリーごみA2は焼
却炉の二次燃焼室２０内へ吹込み、その中の粗い
ものは前記一般ごみA1の表層上で燃焼させ、ま
た、細かいものは二次空気Ｅにより撹拌しつつ浮
遊燃焼させて二次燃焼室２０内に所定温度Ｔの高
温燃焼域Ｇを形成し、前記高カロリーごみA2の
吹込み量を制御することにより、前記温度Ｔを所
定値に保持することを特徴とするダイオキシンの
発生を抑制したごみ焼却方法。 ２ 一般ごみA1を主に燃焼させるストーカ燃焼
装置Ｓと；該ストーカ燃焼装置Ｓの上方に形成さ
れ、二次空気Ｅがタンゼンシヤル状に吹込まれる
二次燃焼室２０と；高カロリーごみA2を前記二
次燃焼室２０内へ吹込むごみ定量供給装置Ｆと；
前記二次燃焼室２０内の温度を検出する温度検出
器２３と；前記温度検出器２３からの信号により
前記高カロリーごみA2の吹込量を調整する制御
装置２９とより構成されており、前記ごみ定量供
給装置Ｆが、ごみの安息角（θ）以上の傾斜部２
５ａを有する箱型のコンベアトラフ２５と、該コ
ンベアトラフ２５内に回動自在に巻回配設したフ
ライトチエーンコンベア２４と、前記コンベアト
ラフ２５の傾斜部２５ａの上方に配設したごみ排
出用シユート２７と、ごみを焼却炉内へ吹込む風
力スプレツダー２８とを具備してなることを特徴
とするダイオキシンの発生を抑制したごみ焼却
炉。[Claims] 1 General garbage A 1 is a stoker combustion device S of an incinerator
At the same time, the high-calorie waste A2 is blown into the secondary combustion chamber 20 of the incinerator, the coarse waste is burned on the surface layer of the general waste A1 , and the fine waste is blown into the secondary combustion chamber 20. A high-temperature combustion zone G with a predetermined temperature T is formed in the secondary combustion chamber 20 by floating combustion while stirring with air E, and the temperature T is maintained at a predetermined value by controlling the amount of high-calorie waste A 2 blown into. A garbage incineration method that suppresses the generation of dioxin, which is characterized by maintaining the level of dioxin at a certain level. 2. A stoker combustion device S that mainly burns general waste A 1 ; a secondary combustion chamber 20 formed above the stoker combustion device S and into which secondary air E is blown in in a tangential manner; and a high-calorie waste A 2 a garbage quantitative supply device F that blows into the secondary combustion chamber 20;
It is composed of a temperature detector 23 that detects the temperature inside the secondary combustion chamber 20; and a control device 29 that adjusts the amount of high-calorie waste A 2 blown in based on a signal from the temperature detector 23. The garbage quantitative supply device F is installed at the inclined portion 2 where the angle of repose (θ) of the garbage is greater than or equal to the angle of repose (θ) of the garbage.
5a, a flight chain conveyor 24 rotatably wound around the conveyor trough 25, and a garbage discharge chute disposed above the inclined portion 25a of the conveyor trough 25. 27, and a wind spreader 28 for blowing waste into the incinerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16483187A JPS6410011A (en) | 1987-06-30 | 1987-06-30 | Refuse incinerating method, refuse incinerator and refuse feeder to prevent synthesis of dioxine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16483187A JPS6410011A (en) | 1987-06-30 | 1987-06-30 | Refuse incinerating method, refuse incinerator and refuse feeder to prevent synthesis of dioxine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6410011A JPS6410011A (en) | 1989-01-13 |
| JPH0337090B2 true JPH0337090B2 (en) | 1991-06-04 |
Family
ID=15800759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16483187A Granted JPS6410011A (en) | 1987-06-30 | 1987-06-30 | Refuse incinerating method, refuse incinerator and refuse feeder to prevent synthesis of dioxine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6410011A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03225106A (en) * | 1990-01-29 | 1991-10-04 | Hitachi Zosen Corp | Method of suppressing generation of dioxine in garbage incinerator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833932A (en) * | 1971-09-06 | 1973-05-15 | ||
| JPS52148973A (en) * | 1976-06-03 | 1977-12-10 | Martin Feuerungsbau | Method of burning secondary fuel with fundamental fuel in large furnace |
-
1987
- 1987-06-30 JP JP16483187A patent/JPS6410011A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833932A (en) * | 1971-09-06 | 1973-05-15 | ||
| JPS52148973A (en) * | 1976-06-03 | 1977-12-10 | Martin Feuerungsbau | Method of burning secondary fuel with fundamental fuel in large furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6410011A (en) | 1989-01-13 |
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