JP3312922B2 - Dust ash treatment method - Google Patents
Dust ash treatment methodInfo
- Publication number
- JP3312922B2 JP3312922B2 JP34349791A JP34349791A JP3312922B2 JP 3312922 B2 JP3312922 B2 JP 3312922B2 JP 34349791 A JP34349791 A JP 34349791A JP 34349791 A JP34349791 A JP 34349791A JP 3312922 B2 JP3312922 B2 JP 3312922B2
- Authority
- JP
- Japan
- Prior art keywords
- ash
- dust
- internal gas
- dechlorination
- dust collection
- 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
Links
- 239000000428 dust Substances 0.000 title claims description 47
- 238000000034 method Methods 0.000 title claims description 10
- 239000002956 ash Substances 0.000 claims description 37
- 238000006298 dechlorination reaction Methods 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 12
- 150000004045 organic chlorine compounds Chemical class 0.000 claims description 10
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 5
- 239000003463 adsorbent Substances 0.000 claims description 4
- 239000012716 precipitator Substances 0.000 claims description 4
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000004056 waste incineration Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052785 arsenic Inorganic materials 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 6
- 238000011109 contamination Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- OGBQILNBLMPPDP-UHFFFAOYSA-N 2,3,4,7,8-Pentachlorodibenzofuran Chemical compound O1C2=C(Cl)C(Cl)=C(Cl)C=C2C2=C1C=C(Cl)C(Cl)=C2 OGBQILNBLMPPDP-UHFFFAOYSA-N 0.000 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 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- -1 PCDF (polychlorinated dibenzofuran Chemical class 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NFBOHOGPQUYFRF-UHFFFAOYSA-N oxanthrene Chemical class C1=CC=C2OC3=CC=CC=C3OC2=C1 NFBOHOGPQUYFRF-UHFFFAOYSA-N 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 102220115768 rs886039839 Human genes 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Gasification And Melting Of Waste (AREA)
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
- Fire-Extinguishing Compositions (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、集じん灰の処理方法に
係り、特に、都市ごみ、産業廃棄物等の廃棄物を焼却し
た時の集じん灰に含まれる、例えばダイオキシン等の有
害有機塩素化合物を分解する集じん灰の処理方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating dust ash, and more particularly, to harmful organic substances such as dioxins contained in dust ash when incinerating waste such as municipal waste and industrial waste. The present invention relates to a method for treating dust ash that decomposes chlorine compounds.
【０００２】[0002]
【従来の技術】図４は、集じん灰の処理方法に使用され
る、本発明者らの提案による未公知の加熱脱塩素化装置
の説明図である。この装置は、装置本体３１と、その内
部に配置された複数の回転軸３２と、前記装置本体の外
表面に設けられたバンドヒータ３３と、前記回転軸３２
内部に埋設された棒状ヒータとから主として構成されて
おり、軸方向の一端上部に処理すべき焼却灰の投入口３
４が、また他方端下部には処理済み焼却灰の排出口３６
が設けられている。2. Description of the Related Art FIG . 4 is an explanatory view of an unknown heat dechlorination apparatus proposed by the present inventors and used in a method for treating dust ash. The apparatus comprises an apparatus main body 31, a plurality of rotating shafts 32 disposed therein, a band heater 33 provided on an outer surface of the apparatus main body,
And a rod-shaped heater buried therein, and is provided at an upper end of one end in the axial direction of an incineration ash inlet 3 to be treated.
4 and a discharge port 36 for treated incinerated ash
Is provided.
【０００３】バグフィルタ、電気集塵機等で捕集され
る、有機塩素化合物を含んだ集じん灰は、投入口３４か
ら脱塩素化装置３１に投入され、所定回転数で回転する
多軸回転軸３２の導入部Ａのスクリュー３６によって装
置本体３１内を充満しつつ攪拌部Ｂに向かって搬送され
る。攪拌部Ｂに搬送された集じん灰はバンドヒータ３３
および回転軸３２内の棒状ヒータによって約３５０℃ま
で加熱されるとともに、攪拌羽根によって攪拌混合さ
れ、これによって前記集じん灰に含まれるＰＣＤＤ（ポ
リ塩素化ジベンゾダイオキシン）、ＰＣＤＦ（ポリ塩素
化ジベンゾフラン）等、有害有機塩素化合物の約９０〜
９８％が分解処理される。[0003] Dust ash containing an organic chlorine compound, which is collected by a bag filter, an electric dust collector, or the like, is introduced into a dechlorination apparatus 31 through an introduction port 34, and is rotated by a predetermined number of rotations. The apparatus 36 is conveyed toward the stirring section B while filling the inside of the apparatus body 31 by the screw 36 of the introduction section A. The collected ash conveyed to the stirring section B is supplied to the band heater 33.
The mixture is heated to about 350 ° C. by a rod-shaped heater in the rotating shaft 32 and is stirred and mixed by a stirring blade, whereby PCDD (polychlorinated dibenzodioxin) and PCDF (polychlorinated dibenzofuran) contained in the collected ash are collected. About 90 ~ of harmful organic chlorine compounds
98% is decomposed.
【０００４】しかしながら本発明者の実験によれば、上
記ごみ焼却処理施設から排出される集じん灰に含まれ
る、例えばＰＣＤＤ、ＰＣＤＦのうち０．５〜１．０％
が分解されることなく蒸発し、装置の内部ガスに包含さ
れることが明らかとなり、またこの内部ガスが加熱脱塩
素化装置からリークすることによって、前記ＰＣＤＤ、
ＰＣＤＦをはじめ水銀（Ｈｇ）、砒素（Ａｓ）等の有害
金属の飛散による作業環境の汚染が進んでいることが明
らかとなっった。However, according to the experiments of the present inventor, 0.5 to 1.0% of, for example, PCDD and PCDF contained in the dust collected from the refuse incineration plant is included.
Is vaporized without being decomposed, and is found to be contained in the internal gas of the apparatus. Further, when the internal gas leaks from the heat dechlorination apparatus, the PCDD,
It has been clarified that the pollution of the working environment due to scattering of harmful metals such as PCDF, mercury (Hg) and arsenic (As) has been advanced.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、上記
従来技術の問題点を解決し、ごみ焼却灰の再処理装置で
発生する有害有機塩素化合物をはじめ、Ｈｇ、Ａｓ等の
有害成分を含む内部ガスの漏洩を防止するとともに、こ
れを効果的に処理し、内部ガスが漏洩することによる作
業環境の汚染を防止することができる集じん灰の処理方
法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to remove harmful components such as harmful organic chlorine compounds and Hg and As generated in a reprocessing device for refuse incineration ash. It is an object of the present invention to provide a method for treating dust ash, which prevents leakage of internal gas including the internal gas and effectively treats the internal gas to prevent contamination of a working environment due to leakage of the internal gas.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、集じん装置を有する排ガス処理装置が付
設されたごみ焼却施設から排出される集じん灰を加熱、
攪拌して集じん灰に含まれる有機塩素化合物を分解する
集じん灰の処理方法であって、前記集じん灰を内部ガス
がリークしない密閉構造の加熱脱塩素化装置に導入して
加熱処理し、該密閉構造の加熱脱塩素化装置内がわずか
に負圧となるように内部ガスを抜き出して吸着剤が充填
された吸着設備で吸着処理することを特徴とする集じん
灰の処理方法に関する。In order to achieve the above-mentioned object, the present invention provides a method for heating dust ash discharged from a refuse incineration plant provided with an exhaust gas treatment device having a dust collecting device.
Stirring method for processing an organic chlorine compound decomposing precipitators ash contained in the dust collection ashes, heat treatment by introducing the precipitator ash heating dechlorination unit of the sealed structure inside gas does not leak , The inside of the heat dechlorination equipment of the closed structure is small
The present invention relates to a method for treating dust ash, wherein an internal gas is extracted so as to have a negative pressure and is subjected to an adsorption treatment in an adsorption facility filled with an adsorbent.
【０００７】[0007]
【０００８】[0008]
【０００９】[0009]
【作用】密閉構造の加熱脱塩素化装置を使用するととも
に、内部ガスを抜き出すようにしたことにより、該加熱
脱塩素化装置内がわずかに負圧となり、有害成分を含ん
だ内部ガスの漏洩が防止される。抜き出した内部ガスを
排ガス処理装置の集じん装置、例えばバグフィルタのサ
クション側に導入するようにしたことにより、特別の吸
引装置を要することなく内部ガスを効率よく抜き出すこ
とができるようになる。[Function] By using a heat dechlorination device with a closed structure and extracting internal gas, the inside of the heat dechlorination device becomes slightly negative pressure, and leakage of internal gas containing harmful components is reduced. Is prevented. By introducing the extracted internal gas to the dust collection device of the exhaust gas treatment device, for example, the suction side of the bag filter, the internal gas can be efficiently extracted without requiring a special suction device.
【００１０】本発明において、加熱脱塩素化装置から抜
き出した内部ガスをごみ焼却施設の焼却炉内に導入する
ことが好ましい。これによって前記内部ガスに含まれる
有害有機塩素化合物を前記焼却炉内で分解することがで
きる。また本発明において、加熱脱塩素化装置から抜き
出した内部ガスを一旦活性炭等が充填された吸着剤層に
導入し、前記内部ガスに含まれる有害成分を除いたの
ち、前記集じん装置のサクション側に導入することが好
ましい。これによって、内部ガスに含まれる、例えばダ
イオキシン、Ｈｇ、Ａｓ等の有害成分を系外へ漏洩させ
ることなく、事前に分離、回収することができるように
なる。In the present invention, it is preferable that the internal gas extracted from the thermal dechlorination apparatus is introduced into an incinerator of a refuse incineration facility. Thereby, the harmful organic chlorine compound contained in the internal gas can be decomposed in the incinerator. Further, in the present invention, the internal gas extracted from the heat dechlorination apparatus is once introduced into the adsorbent layer filled with activated carbon or the like, and after removing harmful components contained in the internal gas, the suction side of the dust collecting apparatus is removed. Is preferably introduced. As a result, harmful components such as dioxin, Hg, and As contained in the internal gas can be separated and recovered in advance without leaking out of the system.
【００１１】本発明においては、加熱脱塩素化装置の内
部ガスを、該内部ガスがリークしない程度に抜き出せば
よく、その抜き出し量は、処理対象となる焼却灰１ｋｇ
に対して１．０Ｎｍ3 以下とすることが好ましい。抜き
出し量が焼却灰１ｋｇに対して１．０Ｎｍ3 よりも多く
なると、脱塩素化効率が低下したり、または処理された
灰が再度飛散するという問題が生じることがある。In the present invention, the internal gas of the heat dechlorination apparatus may be extracted to such an extent that the internal gas does not leak, and the amount of the extracted gas is 1 kg of incinerated ash to be treated.
To 1.0 Nm 3 or less. If the withdrawal amount exceeds 1.0 Nm 3 per 1 kg of incinerated ash, there may be a problem that the dechlorination efficiency is reduced or the treated ash is scattered again.
【００１２】本発明において、集じん装置としては、例
えばバグフィルタ、電気集じん機等が使用され、また加
熱脱塩素化装置から抜き出した内部ガスを吸着する吸着
設備に充填される吸着剤としては、例えば活性炭が使用
される。In the present invention, for example, a bag filter, an electric dust collector, or the like is used as a dust collecting device, and an adsorbent filled in an adsorbing device for adsorbing internal gas extracted from a heat dechlorination device is used. For example, activated carbon is used.
【００１３】[0013]
【実施例】次に本発明を実施例によりさらに詳細に説明
する。図１は、本発明の一実施例を示す装置系統図であ
る。この装置は、ごみ焼却施設の排ガス煙道１に設けら
れた集じん装置２と、該集じん装置２で集じんされた集
じん灰を加熱脱塩素化装置に導入する集じん灰抜き出し
管３と、該集じん灰抜き出し管３を経て導入された集じ
ん灰を加熱処理する加熱脱塩素化装置４と、該加熱脱塩
素化装置４から抜き出した内部ガスを前記集じん装置２
のサクション側に導入する内部ガス抜き出し管５と、前
記ごみ焼却設備の排ガス煙道の集じん装置２の後流に設
けられた誘引送風機６および煙突７とから主として構成
されている。Next, the present invention will be described in more detail with reference to examples. FIG. 1 is an apparatus system diagram showing one embodiment of the present invention. This apparatus includes a dust collecting device 2 provided in an exhaust gas flue 1 of a refuse incineration plant, and a dust ash extraction pipe 3 for introducing dust ash collected by the dust collecting device 2 into a heat dechlorination device. A heat dechlorination device 4 for heat-treating the dust ash introduced through the dust collection ash extraction pipe 3, and an internal gas extracted from the heat dechlorination device 4 to the dust collection device 2.
It mainly comprises an internal gas extraction pipe 5 introduced on the suction side, and an induction blower 6 and a chimney 7 provided downstream of the dust collecting device 2 of the exhaust gas flue of the refuse incinerator.
【００１４】このような構成において、前記ごみ焼却施
設の集じん装置２で集じんされた集じん灰は、集じん灰
抜き出し管３を経て加熱脱塩素化装置４に導入され、こ
こで約３５０℃で加熱処理され、大部分の有害有機塩素
化合物が分解される。このとき分解されずに残った一部
の有機塩素化合物を含む加熱脱塩素化装置の内部ガス
は、内部ガス抜き出し管５を経て抜出されて前記集じん
装置２のサクション側の排ガス煙道に導入され、集じん
装置で再び処理される。In such a configuration, the dust ash collected in the dust collecting device 2 of the refuse incineration facility is introduced into the heating dechlorination device 4 through the dust ash extraction pipe 3 and is subjected to approximately 350 Heat treatment at ℃ decomposes most harmful organic chlorine compounds. At this time, the internal gas of the thermal dechlorination apparatus containing a part of the organic chlorine compound remaining without being decomposed is extracted through the internal gas extraction pipe 5, and is discharged to the exhaust gas flue on the suction side of the dust collection apparatus 2. It is introduced and processed again in a dust collector.
【００１５】本実施例によれば、加熱脱塩素化装置の内
部ガスを所定の割合で抜き出すことにより、前記加熱脱
塩素化装置からの有害有機塩素化合物やＨｇ、Ａｓ等の
有害金属を含む内部ガスの漏洩が防止されるので、作業
環境の汚染を回避することができる。図２は、本発明の
他の実施例を示す装置系統図である。この装置は、ごみ
焼却施設の排ガス煙道１に設けられた集じん装置２と、
該集じん装置２で集じんされた集じん灰を加熱脱塩素化
装置４に導入する集じん灰抜き出し管３と、該集じん灰
抜き出し管３を経て導入された集じん灰を加熱処理する
加熱脱塩素化装置４と、該加熱脱塩素化装置４から抜き
出した内部ガスを前記ごみ焼却施設の焼却炉８に導入す
る内部ガス抜き出し管５と、前記ごみ焼却設備の排ガス
煙道の集じん装置２の後流に設けられた誘引送風機６お
よび煙突７とから主として構成されている。According to this embodiment, the internal gas containing harmful organic chlorine compounds and harmful metals such as Hg and As from the thermal dechlorination apparatus is extracted by extracting the internal gas of the thermal dechlorination apparatus at a predetermined rate. Since leakage of gas is prevented, contamination of the working environment can be avoided. FIG. 2 is an apparatus system diagram showing another embodiment of the present invention. This device includes a dust collection device 2 provided in an exhaust gas flue 1 of a refuse incineration facility,
A dust ash extraction pipe 3 for introducing the dust ash collected by the dust collection device 2 into a heat dechlorination device 4 and a dust ash introduced through the dust ash extraction tube 3 are subjected to heat treatment. A heating dechlorination apparatus 4, an internal gas extraction pipe 5 for introducing an internal gas extracted from the heating dechlorination apparatus 4 into an incinerator 8 of the refuse incineration facility, and dust collection of an exhaust gas flue of the refuse incineration equipment. It mainly comprises an induction blower 6 and a chimney 7 provided downstream of the device 2.
【００１６】このような構成において、加熱脱塩素化装
置４から抜き出された内部ガスは焼却炉８に導入され、
該焼却炉８内で分解される。本実施例によれば、メイン
ストリームにバグフィルタ等の集じん装置を有する設備
における集じん灰を加熱処理する加熱脱塩素化装置の内
部ガスに含まれる有害有機塩素化合物やＨｇ、Ａｓ等の
有害金属を外部に漏洩することがないので、作業環境の
汚染を回避することができる。In such a configuration, the internal gas extracted from the thermal dechlorination unit 4 is introduced into the incinerator 8,
It is decomposed in the incinerator 8. According to this embodiment, harmful organic chlorine compounds and harmful substances such as Hg and As contained in the internal gas of the heat dechlorination apparatus for heat-treating the dust ash in equipment having a dust collection apparatus such as a bag filter in the main stream. Since the metal does not leak outside, contamination of the working environment can be avoided.
【００１７】図３は、本発明の別の実施例を示す装置系
統図である。本実施例が第１図と異なる点は、加熱脱塩
素化装置４から抜き出した内部ガスを、例えば活性炭が
充填された吸着塔９を経て前記集じん装置２の前流の排
ガス煙道１に導入するようにした点である。本実施例に
よれば、加熱脱塩素化装置４から抜き出された内部ガス
に含まれる、例えばダイオキシン、Ｈｇ、Ａｓ等の有害
成分は吸着塔９で吸着されるので、こら有害成分の漏洩
が防止され、作業環境汚染が回避される。FIG. 3 is an apparatus system diagram showing another embodiment of the present invention. This embodiment is different from FIG. 1 in that the internal gas extracted from the thermal dechlorination unit 4 is passed through an adsorption tower 9 filled with activated carbon, for example, to an exhaust gas flue 1 upstream of the dust collection unit 2. The point is to introduce it. According to the present embodiment, harmful components such as dioxin, Hg, As and the like contained in the internal gas extracted from the thermal dechlorination apparatus 4 are adsorbed by the adsorption tower 9, so that leakage of these harmful components is prevented. Is prevented and working environment pollution is avoided.
【００１８】[0018]
【発明の効果】本発明によれば、密閉構造の加熱脱塩素
化装置を用いるとともに、該加熱脱塩素化装置の内部ガ
スを抜き出して吸着設備で処理することにより、前記加
熱脱塩素化装置の内部ガスの漏洩による作業環境汚染を
防止しつつ、かつ排ガス処理装置の負荷を上昇させるこ
となく集じん灰を処理することができる。 According to the present invention , a heat dechlorination apparatus having a closed structure is used, and the internal gas of the heat dechlorination apparatus is extracted and treated by an adsorption facility, whereby the heat treatment is performed.
Work environment pollution due to leakage of gas inside the thermal dechlorination unit
While increasing the load on the exhaust gas treatment equipment.
Dust collected ash can be processed without delay.
【００１９】[0019]
【図１】図１は、本発明の一実施例を示す装置系統図で
ある。FIG. 1 is a system diagram showing an embodiment of the present invention.
【図２】図２は、本発明の他の実施例を示す装置系統図
である。FIG. 2 is an apparatus system diagram showing another embodiment of the present invention.
【図３】図３は、本発明の別の実施例を示す装置系統図
である。FIG. 3 is an apparatus system diagram showing another embodiment of the present invention.
【図４】図４は、従来技術を示す説明図である。FIG. 4 is an explanatory diagram showing a conventional technique.
１…排ガス煙道、２…集じん装置、３…集じん灰抜き出
し管、４…加熱脱塩素化装置、５…内部ガス抜き出し
管、６…誘引送風機、７…煙突、８…焼却炉、９…吸着
塔。DESCRIPTION OF SYMBOLS 1 ... Exhaust gas flue, 2 ... Dust collection device, 3 ... Dust collection ash extraction pipe, 4 ... Heat dechlorination equipment, 5 ... Internal gas extraction pipe, 6 ... Induction blower, 7 ... Chimney, 8 ... Incinerator, 9 ... adsorption tower.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−78479（ＪＰ，Ａ) 特開 平３−232579（ＪＰ，Ａ) 特開 昭63−69524（ＪＰ，Ａ) 特開 平５−31475（ＪＰ，Ａ) 実開 昭57−36420（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B09B 3/00 A62D 3/00 F23J 1/00 F23J 15/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-78479 (JP, A) JP-A-3-232579 (JP, A) JP-A-63-69524 (JP, A) JP-A-5-78 31475 (JP, A) Fully open 1979-36420 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B09B 3/00 A62D 3/00 F23J 1/00 F23J 15/00
Claims (1)
設されたごみ焼却施設から排出される集じん灰を加熱、
攪拌して集じん灰に含まれる有機塩素化合物を分解する
集じん灰の処理方法であって、前記集じん灰を内部ガス
がリークしない密閉構造の加熱脱塩素化装置に導入して
加熱処理し、該密閉構造の加熱脱塩素化装置内がわずか
に負圧となるように内部ガスを抜き出して吸着剤が充填
された吸着設備で吸着処理することを特徴とする集じん
灰の処理方法。 (1) heating dust ash discharged from a waste incineration plant provided with an exhaust gas treatment device having a dust collection device;
Stirring method for processing an organic chlorine compound decomposing precipitators ash contained in the dust collection ashes, heat treatment by introducing the precipitator ash heating dechlorination unit of the sealed structure inside gas does not leak , The inside of the heat dechlorination equipment of the closed structure is small
A method for treating dust collection ash, comprising extracting an internal gas so as to have a negative pressure and performing an adsorption treatment in an adsorption facility filled with an adsorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34349791A JP3312922B2 (en) | 1991-12-25 | 1991-12-25 | Dust ash treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34349791A JP3312922B2 (en) | 1991-12-25 | 1991-12-25 | Dust ash treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05168728A JPH05168728A (en) | 1993-07-02 |
| JP3312922B2 true JP3312922B2 (en) | 2002-08-12 |
Family
ID=18361974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34349791A Expired - Lifetime JP3312922B2 (en) | 1991-12-25 | 1991-12-25 | Dust ash treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3312922B2 (en) |
-
1991
- 1991-12-25 JP JP34349791A patent/JP3312922B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05168728A (en) | 1993-07-02 |
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