JPH1119623A - Treatment of refuse incineration ash containing dioxin - Google Patents

Treatment of refuse incineration ash containing dioxin

Info

Publication number
JPH1119623A
JPH1119623A JP9193103A JP19310397A JPH1119623A JP H1119623 A JPH1119623 A JP H1119623A JP 9193103 A JP9193103 A JP 9193103A JP 19310397 A JP19310397 A JP 19310397A JP H1119623 A JPH1119623 A JP H1119623A
Authority
JP
Japan
Prior art keywords
dioxin
cement
incineration ash
kiln
refuse incineration
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.)
Withdrawn
Application number
JP9193103A
Other languages
Japanese (ja)
Inventor
Masayasu Yamazaki
正康 山▲崎▼
Koichi Hashimoto
光一 橋本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP9193103A priority Critical patent/JPH1119623A/en
Publication of JPH1119623A publication Critical patent/JPH1119623A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/24Cements from oil shales, residues or waste other than slag
    • C04B7/28Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

PROBLEM TO BE SOLVED: To surely and inexpensively make dioxin non-polluting by feeding refuse incineration ash contg. the dioxin into a cement kiln for firing cement clinker from cement raw materials and pyrolyzing the dioxin in the refuse incineration ash by the firing heat at firing the clinker. SOLUTION: The cement raw materials are calcined during the flow down in the respective cyclones 2a of a preheater 2 and are thereafter fed to the kiln tail section 4a of the cement kiln 4 where the cement clinker is fired by burner heating. At this time, the refuse incineration ash contg. the dioxin stored in a storage tank 9 is fed into the kiln tail section 4a by a truck 8 from a refuse incineration furnace 5 and a dust collector 6. Burner heating is executed at a temp. exceeding the pyrolysis temp. of the dioxin in the cement kiln 4 and is rotated at a low speed in a circumferential direction. As a result, the cement clinker is fired and simultaneously the dioxin included in the fed refuse incineration ash is well pyrolyzed and made non-polluting.

Description

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

【0001】[0001]

【発明の属する技術分野】この発明はダイオキシン含有
ごみ焼却灰の処理方法、詳しくはセメント製造工場に配
備されたセメントキルン内にごみ焼却灰を投入すること
で、このごみ焼却灰中に含まれるダイオキシンを熱分解
するダイオキシンを含有するごみ焼却灰の処理方法に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating incinerated ash containing dioxin, and more particularly, to injecting refuse incinerated ash into a cement kiln provided in a cement manufacturing plant, thereby obtaining dioxin contained in the incinerated ash. The present invention relates to a method for treating waste incineration ash containing dioxins, which thermally decomposes ash.

【0002】[0002]

【従来の技術】ダイオキシン(PCDDs)は、ポリ・
クロロ・ジベンゾ・パラ・ダイオキシン(Poly c
hloro dibenzo−p−dioxin)の略
称で、有機塩素化合物の一種である。このダイオキシン
に類似したものに、ポリ・クロロ・ジベンゾフラン(P
CDFs:Poly chloro dibenzo−
furan)がある。特に、PCDDs の四塩化物
(T4CDDs)であるテトラ・クロロ・ジベンゾ・パ
ラ・ダイオキシン(Tetra chloro dib
enzo−p−dioxin)に属して、2,3,7,
8の位置に塩素を持った2,3,7,8−T4CDDは
猛毒である。また、2,3,7,8−テトラクロロ体
は、トリクロロフェノール、2,4,5−トリクロロフ
ェノキシ酢酸製造時の副産物として得られ、そしてジベ
ンゾ−p−ジオキシンの塩素化により得られる。融点は
306〜307℃である。
2. Description of the Related Art Dioxins (PCDDs) are poly-
Chloro dibenzo para dioxin (Poly c
(Holo dibenzo-p-dioxin), which is a kind of organic chlorine compounds. Similar to this dioxin, polychlorodibenzofuran (P
CDFs: Poly chloro dibenzo-
furan). In particular, tetra chloro dibenzo para dioxin (Tetra chloro dib) which is a tetrachloride of PCDDs (T4CDDs).
eno-p-dioxin), 2,3,7,
2,3,7,8-T4CDD with chlorine at position 8 is highly toxic. The 2,3,7,8-tetrachloro compound is obtained as a by-product during the production of trichlorophenol and 2,4,5-trichlorophenoxyacetic acid, and is obtained by chlorination of dibenzo-p-dioxin. The melting point is 306-307 ° C.

【0003】人体への影響としては、例えばクロロアク
ネ(塩素座瘡)、皮膚の色素沈着、脱毛、多毛、肝機能
異常、流産、出産欠陥などを引き起こすといわれてい
る。
[0003] The effects on the human body are said to cause, for example, chloroacne (chloracne), pigmentation of the skin, hair loss, hirsutism, abnormal liver function, miscarriage, birth defects and the like.

【0004】ところで、ダイオキシンは都市ごみの焼却
施設でも発生することが知られている。以下、詳細に説
明する。ごみ燃焼の初期には大量の炭化水素(Cnm
が発生し、通常はこれが空気と接触してCO2と水に分
解する。しかしながら、両者の接触が悪ければ、ダイオ
キシンやその前駆体などが発生する。一方、焼却炉の排
ガス中にも、ダイオキシンの前駆体が存在する。酸化雰
囲気中でのダイオキシン類は、前駆体から飛灰中の塩化
銅、塩化鉄、炭素を触媒として生成する。特に300℃
付近で多くなる。この反応を、De−Novo Syn
thesis(新合成)という。電気集塵機内がちょう
どこの温度であり、その結果、この機内で多量のダイオ
キシンが発生していた。
[0004] Incidentally, it is known that dioxin is also generated in municipal waste incineration facilities. The details will be described below. A large amount of hydrocarbons in the initial waste combustion (C n H m)
Which usually breaks down into CO 2 and water on contact with air. However, if the contact between the two is poor, dioxin and its precursor are generated. On the other hand, a dioxin precursor is also present in the exhaust gas of an incinerator. Dioxins in an oxidizing atmosphere are generated from a precursor using copper chloride, iron chloride and carbon in fly ash as a catalyst. Especially 300 ° C
Increase near. This reaction is referred to as De-Novo Syn.
Thesis (new synthesis). The temperature inside the electrostatic precipitator was exactly this temperature, and as a result, a large amount of dioxin was generated inside the electric precipitator.

【0005】このようなダイオキシンは、ごみ焼却炉内
でごみを完全燃焼させれば、前駆体ともどもその発生を
抑制することができる。一般に、その条件は“3T”と
いわれている。すなわち、(1)Temperatur
e(温度):炉内温度をダイオキシンが熱分解する70
0℃以上に保つ。(2)Time(時間):十分な対流
時間でもってごみを焼却する。(3)Turbulen
ce(渦流):炉内で燃焼ガスを空気と十分に混合させ
る。排ガス中のO2濃度を高くすると炉内のCO濃度が
低下し、ダイオキシンの発生が抑制されるからである。
そこで、最新式のごみ焼却施設では、ごみを十分なO2
雰囲気で、ゆっくりと時間をかけ、完全燃焼させるよう
に改良されている。
[0005] If such dioxins are completely burned in a refuse incinerator, generation of both dioxins and precursors can be suppressed. Generally, the condition is called “3T”. That is, (1) Temperatur
e (temperature): 70 in which dioxin thermally decomposes in furnace temperature
Keep above 0 ° C. (2) Time (time): Incineration of garbage with sufficient convection time. (3) Turbulen
ce (vortex): The combustion gas is sufficiently mixed with air in the furnace. This is because if the O 2 concentration in the exhaust gas is increased, the CO concentration in the furnace is reduced, and the generation of dioxin is suppressed.
Therefore, a state-of-the-art refuse incineration facility has sufficient O 2
The atmosphere has been modified to slowly burn and burn completely.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、現在操
業しているごみ焼却施設でも、旧式の施設や、コスト的
に有利な簡易型の施設では、法定基準の値を上回るダイ
オキシンが排ガスとして大気開放されたり、ごみ焼却灰
として炉内に残る。通常、ダイオキシンを含むごみ焼却
灰は、有害物質が雨水で溶出しないように擁壁やえん堤
で周りを囲んだ管理型処分場や、コンクリートで蓋をす
る遮断型処分場などの最終処分場に投棄されることで、
最終処分されている。ところが、国土の狭い日本では、
この特殊なごみ処分場の増設がままならないという問題
点があった。
However, even in the refuse incineration facilities currently operating, dioxins exceeding the legal standard value are released to the atmosphere as exhaust gas in old-style facilities and simplified facilities that are advantageous in terms of cost. Or remains in the furnace as incineration ash. Normally, waste incineration ash containing dioxin is sent to final disposal sites such as controlled disposal sites surrounded by retaining walls and dikes to prevent harmful substances from being eluted by rainwater, and closed disposal sites covered with concrete. By being dumped,
Final disposal. However, in Japan where the land is narrow,
There was a problem that the expansion of this special waste disposal site could not be continued.

【0007】そこで、発明者らは、鋭意研究の結果、1
100℃以上という高温で長時間低速回転させてセメン
トクリンカを焼成するセメントキルンに着目した。すな
わち、クリンカ焼成時に、プレヒータで仮焼されたセメ
ント原料や燃料とともに、ダイオキシンを含むごみ焼却
灰を直接キルン内へ投入すれば、クリンカの焼成と同時
にダイオキシンを熱分解して無害化することができるこ
とを知見し、この発明を完成させるに至った。
Therefore, the present inventors have conducted intensive studies and found that
Attention was paid to a cement kiln that sinters a cement clinker by rotating at a high temperature of 100 ° C. or more at a low speed for a long time. That is, during the clinker firing, if the waste incineration ash containing dioxin is directly injected into the kiln together with the cement raw material and fuel calcined by the preheater, the dioxin can be thermally decomposed and made harmless simultaneously with the firing of the clinker. And completed the present invention.

【0008】[0008]

【発明の目的】この発明の目的は、確実かつ安価にダイ
オキシンを無害化することができるダイオキシンを含有
するごみ焼却灰の処理方法を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for treating incineration ash containing dioxin, which can reliably and inexpensively detoxify dioxin.

【0009】[0009]

【課題を解決するための手段】請求項1に記載の発明
は、セメント原料からセメントクリンカを焼成するセメ
ントキルン内に直接ダイオキシンを含むごみ焼却灰を投
入し、クリンカ焼成時の焼成熱によりこのごみ焼却灰中
のダイオキシンを熱分解するダイオキシンを含有するご
み焼却灰の処理方法である。セメントキルン内の焼成温
度は、通常、ダイオキシンの熱分解温度の700℃を上
回る1100〜1450℃である。よって、ダイオキシ
ンは、セメントクリンカをゆっくりと焼成する際に熱分
解されて無害化される。
According to the first aspect of the present invention, waste incineration ash containing dioxin is directly charged into a cement kiln for firing cement clinker from a cement raw material, and the waste is heated by firing heat during clinker firing. This is a method for treating waste incineration ash containing dioxin, which thermally decomposes dioxin in incineration ash. The firing temperature in the cement kiln is usually 1100 to 1450 ° C, which is higher than the pyrolysis temperature of dioxin 700 ° C. Therefore, dioxin is decomposed and detoxified when the cement clinker is slowly fired.

【0010】セメントキルンの回転速度は、例えば1〜
3rpmである。このときのセメントキルンの焼成時間
(原料滞留時間=ダイオキシンの熱分解時間)は、30
分〜1時間である。ダイオキシンは900℃で3秒間加
熱することで分解される。
[0010] The rotation speed of the cement kiln is, for example, 1 to
3 rpm. At this time, the cement kiln firing time (raw material retention time = dioxin thermal decomposition time) is 30.
Minutes to 1 hour. Dioxin is decomposed by heating at 900 ° C. for 3 seconds.

【0011】セメントキルンに投入されるダイオキシン
を含むごみ焼却灰の投入量は、例えばセメントクリンカ
生産量が100t/hrの乾式キルンでは5t/hr以
下とする。すなわち、製造されるセメントクリンカの重
量に対して1/20以下のごみ焼却灰を投入するのが好
ましい。セメント原料に対するごみ焼却灰の添加量が5
重量%を超えるとセメントキルンでの焼成反応が不充分
でセメントクリンカの品質に問題を生じるおそれがある
からである。
The amount of dioxin-containing waste incineration ash to be fed into the cement kiln is, for example, 5 t / hr or less in a dry kiln with a cement clinker production of 100 t / hr. That is, it is preferable to put incineration ash of 1/20 or less based on the weight of the manufactured cement clinker. The amount of waste incineration ash added to the cement raw material is 5
If the content is more than 10% by weight, the sintering reaction in the cement kiln may be insufficient, which may cause a problem in the quality of the cement clinker.

【0012】請求項2に記載の発明は、上記ごみ焼却灰
を、セメントキルン内の約1100℃以上の温度の領域
に投入する請求項1に記載のダイオキシンを含有するご
み焼却灰の処理方法である。
According to a second aspect of the present invention, there is provided the method for treating incineration ash containing dioxin according to the first aspect, wherein the incineration ash is introduced into a cement kiln at a temperature of about 1100 ° C. or higher. is there.

【0013】[0013]

【作用】請求項1、請求項2に記載の発明にあっては、
セメントキルン内に直接、仮焼されたセメント原料およ
び燃料と一緒にダイオキシンを含むごみ焼却灰を投入
し、その後、ダイオキシンの熱分解温度を上回る温度
(例えば1100℃〜1450)で、セメントキルンを
長時間にわたり低速回転し、セメントクリンカを焼成す
る。これにより、セメントクリンカが焼成される際に、
この投入されたごみ焼却灰に含有されたダイオキシンが
熱分解されて無害化される。
According to the first and second aspects of the present invention,
Waste incineration ash containing dioxin is directly injected into the cement kiln together with the calcined cement raw material and fuel, and then the cement kiln is maintained at a temperature higher than the thermal decomposition temperature of dioxin (for example, 1100 ° C. to 1450). Rotate slowly over time to fire the cement clinker. Thereby, when the cement clinker is fired,
The dioxin contained in the input refuse incineration ash is thermally decomposed and made harmless.

【0014】[0014]

【発明の実施の形態】以下、図面に基づいてこの発明を
詳細に説明する。図1はこの発明の一実施例に係るダイ
オキシンを含有するごみ焼却灰の処理方法が適用された
セメント焼成設備の一部断面図を含む正面図である。図
1において、1は実施例に係るダイオキシンを含有する
ごみ焼却灰の処理方法が適用されたセメント焼成設備で
ある。このセメント焼成設備1は、プレヒータ2内で仮
焼されたセメント原料を、乾式のセメントキルン4内で
焼成するものである。このセメントキルン4内には、ご
み処理施設3から輸送されたダイオキシンを含むごみ焼
却灰が直接添加される。ここでのセメントキルン4は、
100t/hでセメントクリンカを生産するものとす
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view including a partial cross-sectional view of a cement burning facility to which a method for treating incineration ash containing dioxin according to an embodiment of the present invention is applied. In FIG. 1, reference numeral 1 denotes a cement burning facility to which a method for treating incineration ash containing dioxin according to an embodiment is applied. The cement sintering facility 1 sinters a cement raw material calcined in a preheater 2 in a dry cement kiln 4. The waste incineration ash containing dioxin transported from the waste treatment facility 3 is directly added into the cement kiln 4. The cement kiln 4 here is
It is assumed that cement clinker is produced at 100 t / h.

【0015】プレヒータ2は、図外の原料ミルにより粉
砕されたセメント原料を、後工程のセメントキルン4に
より焼成しやすいように、所定温度まで予熱するもので
ある。プレヒータ2は、多数のサイクロン2aを、多数
階建ての鉄骨架台に搭載して設けられている。ごみ処理
施設3は、ごみ焼却炉5を本体としている。ごみ焼却炉
5の排気ガス路には集塵機6が途中連結されて、このガ
ス路の末端に排気ガスを大気開放する煙突7が設けられ
ている。ごみ焼却炉5で焼却された都市ごみは、そのダ
イオキシンを含む焼却灰が炉底部から外部排出される一
方、燃焼時に発生した排ガスは、集塵機6によってダイ
オキシンを含む飛灰が除去された後、煙突7から大気開
放される。
The preheater 2 preheats a cement raw material pulverized by a raw material mill (not shown) to a predetermined temperature so as to be easily fired by a cement kiln 4 in a later step. The preheater 2 is provided with a large number of cyclones 2a mounted on a multi-story steel frame. The refuse treatment facility 3 has a refuse incinerator 5 as a main body. A dust collector 6 is connected to the exhaust gas path of the refuse incinerator 5 in the middle, and a chimney 7 for releasing exhaust gas to the atmosphere is provided at an end of the gas path. The municipal waste incinerated in the refuse incinerator 5 has its incineration ash containing dioxin discharged outside from the bottom of the furnace, while the exhaust gas generated during combustion is removed by the dust collector 6 after the fly ash containing dioxin is removed from the chimney. 7 to the atmosphere.

【0016】ごみ焼却炉5の底部から直接排出される多
量のダイオキシンを含むごみ焼却灰と、集塵機6によっ
て排ガス中から除去されたダイオキシンを含む飛灰は、
密閉タンクを搭載したトラック8を用い、一旦、貯留タ
ンク9へ貯留された後、この貯留タンク9から窯尻部4
a内へと投入される。セメントキルン4は、若干下流側
へ下方傾斜した横向き円筒状のキルンシェル4bを有し
ている。キルンシェル4bの内周面には、耐火物4cが
張られている。キルンシェル4bは周方向へ所定回転速
度で回転される。また、キルンシェル4b内では、重油
や微粉石炭を燃料とするバーナ加熱により、プレヒータ
2からのセメント原料が焼成されて、セメントクリンカ
が中間製造される。
The waste incineration ash containing a large amount of dioxin discharged directly from the bottom of the waste incinerator 5 and the fly ash containing dioxin removed from the exhaust gas by the dust collector 6 are:
Once stored in a storage tank 9 using a truck 8 equipped with a closed tank, the storage tank 9 is used to store the kiln bottom 4
It is thrown into a. The cement kiln 4 has a sideways cylindrical kiln shell 4b inclined slightly downward. A refractory 4c is provided on the inner peripheral surface of the kiln shell 4b. The kiln shell 4b is rotated at a predetermined rotational speed in the circumferential direction. Further, in the kiln shell 4b, the cement raw material from the preheater 2 is fired by the burner heating using heavy oil or fine coal as fuel, and the cement clinker is intermediately manufactured.

【0017】次に、セメント焼成設備1を用いたダイオ
キシンを含有するごみ焼却灰の処理方法を説明する。セ
メント原料は、プレヒータ2の各サイクロン2aを流下
中に仮焼される。その後、セメント原料はセメントキル
ン4の窯尻部4aへ投入され、バーナ加熱の焼成によっ
てセメントクリンカが焼成される。この際、セメントキ
ルン4の窯尻部4a内には、ごみ焼却炉5や集塵機6か
らトラック8によって、一旦、貯留タンク9に貯留され
たダイオキシンを含むごみ焼却灰(飛灰を含む)が、5
t/hで投入される。
Next, a method of treating dioxin-containing waste incineration ash using the cement burning facility 1 will be described. The cement raw material is calcined while flowing down each cyclone 2a of the preheater 2. Thereafter, the cement raw material is introduced into the kiln bottom 4a of the cement kiln 4, and the cement clinker is fired by firing with a burner. At this time, refuse incineration ash (including fly ash) containing dioxin once stored in the storage tank 9 by the truck 8 from the refuse incinerator 5 or the dust collector 6 is placed in the kiln bottom 4 a of the cement kiln 4. 5
Feed at t / h.

【0018】その後、このごみ焼却灰が投入されたセメ
ントキルン4では、ダイオキシンの熱分解温度を上回る
1100〜1450℃でのバーナ加熱が行われるととも
に、例えば1〜3rpmの回転速度で周方向へ低速回転
される。また、ごみ焼却灰はこのセメントキルン4で3
0分以上加熱される。これにより、セメントクリンカが
焼成されると同時に、投入されたごみ焼却灰に含まれる
ダイオキシンが良好に熱分解されて無害化される。この
ように、この実施例では、クリンカ焼成熱を利用してご
み焼却灰中のダイオキシンを熱分解するようにしたの
で、例えば二次燃焼室を有するごみ焼却炉を配備した
り、集塵機6の下流にダイオキシン低温加熱分解装置を
配備したりして設備コストが高騰することなく、確実か
つ安価に、ごみ焼却灰中のダイオキシンを無害化するこ
とができる。
Thereafter, in the cement kiln 4 into which the refuse incineration ash has been introduced, the burner is heated at 1100 to 1450 ° C., which is higher than the thermal decomposition temperature of dioxin, and at a low speed in the circumferential direction at a rotation speed of, for example, 1 to 3 rpm. Rotated. The waste incineration ash is 3 in this cement kiln 4
Heat for 0 minutes or more. Thereby, at the same time as the cement clinker is fired, dioxin contained in the injected refuse incineration ash is satisfactorily thermally decomposed and rendered harmless. As described above, in this embodiment, dioxin in refuse incineration ash is thermally decomposed using clinker calcination heat, so that, for example, a refuse incinerator having a secondary combustion chamber is provided, or downstream of the dust collector 6. It is possible to reliably and inexpensively detoxify dioxin in refuse incineration without increasing the equipment cost by disposing a low-temperature pyrolysis device for dioxin.

【0019】[0019]

【発明の効果】この発明では、クリンカ焼成時にセメン
トキルン内へダイオキシンを含むごみ焼却灰を投入する
ようにしたので、セメントクリンカを焼成すると同時
に、発生する高温の焼成熱により、確実かつ安価に、ご
み焼却灰中のダイオキシンを熱分解して無害化すること
ができる。
According to the present invention, the waste incineration ash containing dioxin is introduced into the cement kiln at the time of baking the clinker. Therefore, at the same time as the baking of the cement clinker, the high-temperature baking heat is generated. Dioxin in refuse incineration ash can be decomposed by thermal decomposition.

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

【図1】この発明の一実施例に係るダイオキシンを含有
するごみ焼却灰の処理方法が適用されたセメント焼成設
備の一部断面図を含む正面図である。
FIG. 1 is a front view including a partial cross-sectional view of a cement burning facility to which a method for treating incineration ash containing dioxin according to an embodiment of the present invention is applied.

【符号の説明】[Explanation of symbols]

1 セメント焼成設備、4 セメントキルン。 1 Cement firing equipment, 4 cement kilns.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 セメント原料からセメントクリンカを焼
成するセメントキルン内に直接ダイオキシンを含むごみ
焼却灰を投入し、クリンカ焼成時の焼成熱によりこのご
み焼却灰中のダイオキシンを熱分解するダイオキシンを
含有するごみ焼却灰の処理方法。
1. A refuse incineration ash containing dioxin is directly injected into a cement kiln for firing cement clinker from a cement raw material, and contains dioxin for thermally decomposing dioxin in the refuse incineration ash by firing heat at the time of clinker firing. Waste incineration ash treatment method.
【請求項2】 上記ごみ焼却灰を、セメントキルン内の
約1100℃以上の温度の領域に投入する請求項1に記
載のダイオキシンを含有するごみ焼却灰の処理方法。
2. The method for treating incineration ash containing dioxin according to claim 1, wherein said incineration ash is introduced into a region of a cement kiln at a temperature of about 1100 ° C. or higher.
JP9193103A 1997-07-02 1997-07-02 Treatment of refuse incineration ash containing dioxin Withdrawn JPH1119623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9193103A JPH1119623A (en) 1997-07-02 1997-07-02 Treatment of refuse incineration ash containing dioxin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9193103A JPH1119623A (en) 1997-07-02 1997-07-02 Treatment of refuse incineration ash containing dioxin

Publications (1)

Publication Number Publication Date
JPH1119623A true JPH1119623A (en) 1999-01-26

Family

ID=16302298

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9193103A Withdrawn JPH1119623A (en) 1997-07-02 1997-07-02 Treatment of refuse incineration ash containing dioxin

Country Status (1)

Country Link
JP (1) JPH1119623A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7048784B2 (en) 2003-01-22 2006-05-23 Taiheiyo Cement Corporation Method and system for treating exhaust gas from cement manufacturing equipment
JP2007161523A (en) * 2005-12-13 2007-06-28 Taiheiyo Cement Corp Cement manufacturing method
CN107917427A (en) * 2017-11-03 2018-04-17 南京凯盛开能环保能源有限公司 A kind of system and method for cement kiln synergic processing house refuse

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7048784B2 (en) 2003-01-22 2006-05-23 Taiheiyo Cement Corporation Method and system for treating exhaust gas from cement manufacturing equipment
JP2008174446A (en) * 2003-01-22 2008-07-31 Taiheiyo Cement Corp Method for treating exhaust gas from cement manufacturing equipment
JP2007161523A (en) * 2005-12-13 2007-06-28 Taiheiyo Cement Corp Cement manufacturing method
CN107917427A (en) * 2017-11-03 2018-04-17 南京凯盛开能环保能源有限公司 A kind of system and method for cement kiln synergic processing house refuse

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