JP2005131615A - Calcining detoxication method of a plurality of mixed pollutants and apparatus therefor - Google Patents
Calcining detoxication method of a plurality of mixed pollutants and apparatus therefor Download PDFInfo
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- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 32
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001354 calcination Methods 0.000 title abstract description 9
- 239000002956 ash Substances 0.000 claims abstract description 33
- 239000010881 fly ash Substances 0.000 claims abstract description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 239000000446 fuel Substances 0.000 claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 17
- 150000002013 dioxins Chemical class 0.000 claims abstract description 12
- 150000004045 organic chlorine compounds Chemical class 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000010304 firing Methods 0.000 claims description 27
- 238000001784 detoxification Methods 0.000 claims description 17
- 239000000356 contaminant Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000002916 wood waste Substances 0.000 claims description 4
- 150000003071 polychlorinated biphenyls Chemical class 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 24
- 239000000463 material Substances 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 4
- -1 dioxins and PCB Chemical class 0.000 abstract description 3
- 230000004927 fusion Effects 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 6
- 239000000295 fuel oil Substances 0.000 description 6
- 239000013049 sediment Substances 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 235000011116 calcium hydroxide Nutrition 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000006148 magnetic separator Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000001603 reducing effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 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
- 239000002253 acid Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/78—Recycling of wood or furniture waste
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- Processing Of Solid Wastes (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
本発明は、ダイオキシン類、ＰＣＢ等の有機塩素化合物、並びに有害な重金属類を含んだ焼却灰及び焼却飛灰並びに土壌等を焼成法により無害化し、さらに建築・土木用資材に加工する処理方法、及び処理システム（処理装置）に関する。 The present invention is a treatment method for detoxifying incinerated ash and incinerated fly ash containing soil and organic chlorine compounds such as dioxins, PCBs, and harmful heavy metals, and further processing into materials for construction and civil engineering, And a processing system (processing device).
近年、環境問題に対する社会の関心が高まる中で、リサイクル関連、廃棄物関連、土壌汚染関連の諸法律の整備が進み、焼却施設から発生する焼却灰、焼却飛灰や工場の跡地の汚染土壌、産業廃棄物などにおいて有害物質を無害化し、且つ、資源としてリサイクル出来る技術開発が求められている。 In recent years, as social concerns about environmental issues have increased, laws related to recycling, waste, and soil contamination have been improved, and incineration ash generated from incineration facilities, incineration fly ash and contaminated soil in factory sites, There is a need for the development of technology that can detoxify harmful substances in industrial waste and can be recycled as resources.
各々の汚染源に対しての無害化技術、各々の無害化物の再資源化技術は単独では既に開発されている。
しかし、ダイオキシン類に汚染され、且つ有害な重金属類を含むなどの複合状態にあるものも多く存在し、また、焼却灰といっても大きくは主灰・飛灰に分けられるものの、その含有汚染物質の種類は雑多である。
Detoxification technology for each pollution source and recycling technology for each detoxification product have already been developed alone.
However, there are many compounds that are contaminated by dioxins and contain toxic heavy metals, and incineration ash can be roughly divided into main ash and fly ash, but it contains contamination. There are various kinds of substances.
複合汚染物質に対して、準じ相当する無害化技術を使い汚染物を無害化することは可能であるが、各々でエネルギーを消費し、また、専用の無害化薬品を消費するため、その処理経費は増大する。
また、運搬等のハンドリングコストがかさむばかりでなく、運搬時の二次汚染も懸念される。
It is possible to detoxify pollutants using equivalent detoxification technology for complex pollutants, but each consumes energy and exclusive detoxification chemicals. Will increase.
In addition, handling costs such as transportation are increased, and there is a concern about secondary contamination during transportation.
本発明では、上述のような問題に鑑み、複合汚染された焼却灰・焼却飛灰・汚染土壌と多種にわたる汚染物を特別な薬品を使用せずに同時に無害化処理でき、且つ、建築、土木資材の原料まで加工することを目的とする。 In the present invention, in view of the above problems, incinerated ash, incinerated fly ash, contaminated soil and a variety of contaminated materials can be detoxified at the same time without using special chemicals. The purpose is to process even raw materials.
また、無害化、再資源化に係る処理に供するエネルギーを最小とし、移動等にかかわる処理経費の削減・二次汚染の防止も目的とする。 In addition, the purpose is to minimize the energy used for the processing related to detoxification and recycling, to reduce processing costs related to movement, etc., and to prevent secondary contamination.
上記目的を達成するために、本発明は、焼却主灰・焼却飛灰・土壌等の複数の種類の汚染物質を造粒する工程と、この造粒された汚染物質を低酸素雰囲気下で焼成する工程とが含まれることを特徴とする。
また、複数・複合汚染物質に含まれている、ダイオキシン類やＰＣＢなどの有機塩素化合物と有害な重金属類とを、同時に無害化できる。
この場合に、汚染物質の焼成により発生した排ガスを燃焼用空気と混合し、燃料を燃焼させることにより低酸素雰囲気下にし、焼成炉内温度を焼成物の溶融温度以下に維持することを特徴とする。
さらには、木くず燃料又はＲＰＦ燃料あるいはその両方を、造粒された汚染物質に混合することで焼成時に重金属を還元し、焼成用燃料の低減を図ったことを特徴とする。
処理装置としては、汚染物質の造粒手段と、この造粒された汚染物質を焼成する焼成炉と、焼成炉内を低酸素雰囲気に調整する手段とを備えたことを特徴とする。
より具体的には、焼却灰・焼却飛灰・汚染土壌を櫛機で粒径毎に分別し、造粒し原料化する工程と、前記原料に破砕した木くず燃料又はＲＰＦ燃料又はその両方を混合し、定量供給装置で焼成キルンへ投入する工程と、排ガスを減温器により急速減温し、バグフィルターにてダストを集塵し排出する工程と焼成キルン内の酸素濃度を調整するための燃焼空気導入装置からなる。
ＲＰＦ燃料はＲＤＦあるいは廃プラスチックであっても良い。
また、焼却飛灰はバグフィルターから排出される消石灰を多く含んだアルカリ飛灰であっても良い。
In order to achieve the above object, the present invention comprises a step of granulating a plurality of types of pollutants such as incinerated main ash, incinerated fly ash, and soil, and firing the granulated pollutants in a low oxygen atmosphere. And a step of performing.
In addition, organic chlorine compounds such as dioxins and PCBs and harmful heavy metals contained in plural / complex contaminants can be rendered harmless at the same time.
In this case, the exhaust gas generated by burning the pollutants is mixed with combustion air, and the fuel is burned to make it in a low oxygen atmosphere, and the temperature in the firing furnace is maintained below the melting temperature of the fired product. To do.
Further, the present invention is characterized in that heavy metal is reduced at the time of firing by mixing wood waste fuel and / or RPF fuel with granulated pollutants, thereby reducing the fuel for firing.
The processing apparatus includes a pollutant granulating means, a firing furnace for firing the granulated contaminant, and a means for adjusting the inside of the firing furnace to a low oxygen atmosphere.
More specifically, incineration ash / incineration fly ash / contaminated soil is separated by particle size with a comb machine, granulated and used as raw material, and crushed wood waste fuel or RPF fuel or both are mixed into the raw material The process of charging the calcining kiln with a quantitative supply device, the process of rapidly reducing the temperature of exhaust gas with a desuperheater, collecting and discharging dust with a bag filter, and the combustion for adjusting the oxygen concentration in the calcining kiln It consists of an air introduction device.
The RPF fuel may be RDF or waste plastic.
The incinerated fly ash may be alkaline fly ash containing a large amount of slaked lime discharged from the bag filter.
この焼却灰・焼却飛灰・汚染土壌の無害化処理によれば、多様な汚染物質を同時に安全に無害化出来る。
また、造粒物を一時的に貯留する原料貯蔵ピットを備えると入荷量の変化に対応が可能で効率の良い無害化・再資源化が可能である。
According to the detoxification treatment of incineration ash, incineration fly ash, and contaminated soil, various pollutants can be made safe and harmless at the same time.
In addition, if a raw material storage pit for temporarily storing the granulated material is provided, it is possible to cope with changes in the amount of incoming goods, and it is possible to make harmless and recycle efficiently.
破砕木くずやＲＰＦ燃料はそれが含有する固定炭素により、焼成時に必要なバーナー熱源のエネルギーの節約に供し、また保有する固定炭素は焼成キルン内で重金属に対して還元作用を持ち、特に有害な六価クロムの発生を抑制し、重金属揮発を促進する。 Crushed wood scraps and RPF fuel are used to save energy of the burner heat source necessary for firing due to the fixed carbon contained in them, and the fixed carbon possessed has a reducing action on heavy metals in the firing kiln and is particularly harmful. Suppresses generation of valent chromium and promotes heavy metal volatilization.
振動篩機並びに磁選機にて一定の粒径にされた焼却灰と焼却飛灰を混合し、造粒すると焼成製品の粒径を一定化し再資源化しやすくなる。
また、近年の焼却設備に多用されているバグフィルターから排出される消石灰を含んだアルカリ飛灰は単独で焼成すると固着することが知られている。
しかし、混合造粒を行うことにより固着を防止することができる。
When incinerated ash and incinerated fly ash having a constant particle size are mixed by granulation and a magnetic separator, and granulated, the particle size of the baked product is fixed and it is easy to recycle.
Further, it is known that alkaline fly ash containing slaked lime discharged from bag filters that are frequently used in recent incineration facilities is fixed when fired alone.
However, sticking can be prevented by performing mixed granulation.
焼成時に供給する焼成用空気は外気及び最終の排気ガスを混合し、そのバランス調整により、焼成キルン内の酸素濃度及び温度調整を行う。
また、その調整量は煙突に付加された酸素濃度測定装置からのフィードバック信号を利用しても、手動でも構わない。
酸素濃度を低下させると燃焼温度は上昇することは公知の事実である。
重金属を揮発させるためには低酸素運転が好ましいため、酸素濃度を低下させると焼成炉内温度が上がり過ぎ、溶融を起こす。
本発明においては、外気よりも酸素濃度が低い排ガスを導入することにより炉内を低酸素状態に保ちつつ、低酸素溶融温度まで炉内温度を上昇させない手法を用いた。
なお、低酸素状態とは概ね７容量％以下をいう。
The firing air supplied during firing mixes the outside air and the final exhaust gas, and adjusts the oxygen concentration and temperature in the firing kiln by adjusting the balance.
The amount of adjustment may be manual or manual using a feedback signal from an oxygen concentration measuring device added to the chimney.
It is a known fact that the combustion temperature increases when the oxygen concentration is lowered.
In order to volatilize heavy metals, low oxygen operation is preferable. Therefore, when the oxygen concentration is lowered, the temperature in the firing furnace rises too much, causing melting.
In the present invention, a method is used in which the temperature inside the furnace is not increased to the low oxygen melting temperature while the inside of the furnace is kept in a low oxygen state by introducing exhaust gas having a lower oxygen concentration than the outside air.
The low oxygen state generally means 7% by volume or less.
燃焼バーナー用燃料は重油・灯油・再生油のいずれの燃料を使用しても良い。 The fuel for the combustion burner may be any of heavy oil, kerosene, and recycled oil.
燃焼バーナー用燃料はランニングコスト及びキルン内酸素濃度の調整を行う場合には再生油を使用することが好ましい。 The fuel for the combustion burner is preferably regenerated oil when adjusting the running cost and the oxygen concentration in the kiln.
設備からの処理物及び製品の飛散を防止するために、密閉構造を折り込み、外部飛散が極力起きない構造にするのが好ましい。 In order to prevent scattering of processed products and products from the facility, it is preferable to fold the sealed structure so that external scattering does not occur as much as possible.
本発明によれば、ダイオキシン類をはじめとする有害有機塩素化合物や重金属に汚染された焼却灰・焼却飛灰・土壌等を破砕した木くず、ＲＰＦ、若しくはＲＤＦ、若しくは廃プラスチック類を一定の割合で添加して焼成処理することにより、同時に無害化することができる。
特に、有害有機塩素化合物や重金属による汚染を同時に処理できるという優れた効果があると同時に廃棄物を燃料とし製造された固形化燃料及び廃棄物である廃プラスチックを熱エネルギーとして利用することができるという廃棄物を利用した廃棄物処理が出来る特徴を持つ。
また、処理物は各種原料に再利用することが出来るという循環型社会に貢献するという優れた特徴を持つ。
According to the present invention, wood scrap, RPF, RDF, or waste plastics crushed from incinerated ash, incinerated fly ash, soil, etc. contaminated with harmful organic chlorine compounds and heavy metals including dioxins, at a certain ratio By adding and baking, it can be rendered harmless at the same time.
In particular, it has the excellent effect of being able to treat pollution caused by toxic organochlorine compounds and heavy metals at the same time, and at the same time, it is possible to use solid fuel produced from waste as fuel and waste plastic as waste as thermal energy. It has the feature of being able to treat waste using waste.
In addition, the processed product has an excellent feature that it contributes to a recycling society in which it can be reused as various raw materials.
以下、本発明の実施の形態による焼却灰・焼却飛灰・汚染土壌の同時無害化処理方法を図１を参照して説明する。
図１は本実施の形態による焼却・焼却飛灰・汚染土壌の同時無害化処理方法における全体のフローを概略的に示す図である。
図２・３は図１の焼却灰・焼却飛灰・汚染土壌の同時無害化処理方法により無害化した製品の実施例試験結果である。
Hereinafter, a method for simultaneously detoxifying incineration ash, incineration fly ash, and contaminated soil according to an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a diagram schematically showing an overall flow in the simultaneous detoxification method for incineration, incineration fly ash and contaminated soil according to the present embodiment.
FIGS. 2 and 3 show the test results of the examples of the products detoxified by the simultaneous detoxification method for incineration ash, incineration fly ash and contaminated soil in FIG.
図１の焼却灰・焼却飛灰・汚染土壌の同時無害化処理方法は、処理対象の振動櫛機３、磁選機４、破砕機５、金属保管施設６、造粒機７、原料貯蔵ピット８、投入クレーン９・１０、原料ホッパ１１、定量供給装置１２、焼成炉１３、二次燃焼バーナ１４、燃焼バーナ１５、冷却コンベア１６、重油タンク１８、燃焼ファン１９、駆動モーター２０、減温器２１、減温水タンク２１ａ、飛灰回収保管ボックス２１ｂ、バグフィルター２２、消石灰供給フィーダー２２ａ、飛灰回収保管ボックス２１ｂ、２２ｂ、コンプレッサー２２ｃ、送風機２３、煙突２４、酸素濃度計２５を含む。
The simultaneous detoxification method for incineration ash, incineration fly ash, and contaminated soil in FIG. 1 is the
図１の焼却灰・焼却飛灰・汚染土壌の同時無害化処理方法における汚染物の処理工程を図１により説明する。 The process for treating contaminants in the method of simultaneous detoxification of incinerated ash, incinerated fly ash, and contaminated soil in FIG. 1 will be described with reference to FIG.
図１を参照し、処理対象となる汚染物は、焼却主灰、焼却飛灰、土壌、底質、粉砕物、沈殿物等のダイオキシン類、ＰＣＢ等の有機塩素化合物を含んだ汚染物質であり、原料保管場所１、２に保管される。
Referring to FIG. 1, the pollutants to be treated are pollutants containing incinerated main ash, incinerated fly ash, dioxins such as soil, bottom sediment, pulverized material and sediment, and organic chlorine compounds such as PCB. The raw materials are stored in the
ここで、焼却灰等の比較的大きいものは原料保管場所１から投入クレーン９により振動櫛機３に投入される。
粒径１０ｍｍ以上のものはベルトコンベアにより磁選機４を通過し、破砕機５へ入る。
破砕された焼却灰は原料保管場所１に戻される。
なお、原料保管場所１の焼却灰は汚染された土壌、底質、粉砕物、沈殿物等であっても構わない。
磁選機４で選別された金属類は金属屑保管施設６に保管され、再生業者へ回付され、再生利用される。
Here, relatively large items such as incineration ash are put into the vibrating
Those having a particle size of 10 mm or more pass through the magnetic separator 4 by the belt conveyor and enter the
The crushed incineration ash is returned to the raw
Note that the incineration ash in the raw
Metals selected by the magnetic separator 4 are stored in the metal
選別された焼却灰は造粒機７ベルトコンベアで搬送される。
粒度が小さい燃焼飛灰等は原料保管場所２から直接、投入クレーン９により、造粒機７へ搬送される。
The sorted incineration ash is conveyed by a granulator 7 belt conveyor.
Combustion fly ash having a small particle size is conveyed directly from the raw
造粒機７で混合物は造粒され、概ね１〜１０ｍｍの造粒物に加工され、原料貯蔵ピット８に保管される。
造粒の際には適度な加湿を行うので飛散量は非常に少ない。
The mixture is granulated by the granulator 7, processed into a granulated product of approximately 1 to 10 mm, and stored in the raw material storage pit 8.
The amount of scattering is very small because of appropriate humidification during granulation.
原料貯蔵ピット８に保管された造粒物は投入クレーン１０により、原料ホッパ１１に搬送される。
その際に加熱用燃料の削減及び重金属類の還元に供するために、粉砕木くず燃料、ＲＰＦ燃料と混合される。
原料に固定炭素分が多い場合には、適時補助燃料混合割合を調整する。
The granulated material stored in the raw material storage pit 8 is conveyed to the
At that time, in order to reduce the heating fuel and reduce heavy metals, it is mixed with crushed wood waste fuel and RPF fuel.
If the raw material contains a large amount of fixed carbon, adjust the auxiliary fuel mixing ratio in a timely manner.
原料ホッパ１１に投入された焼成原料は定量供給装置１２により、一定量ずつ回転円筒形の焼成炉１３に投入される。
定量供給装置１２には上シャッター１２ｃ、下シャッター１２ｄが具備し二重扉方式を採用しており、外気と焼成炉内を分離している。
定量供給装置は供給口の周囲を水冷（１２ｅ）していて、投入プッシャー１２ｂで定量ずつ焼成炉１３の加熱部位まで供給される。
The calcined raw material charged into the
The fixed
The fixed amount supply device is water-cooled (12e) around the supply port, and is supplied to the heating portion of the
回転円筒は、駆動モーター２０で回転制御され（伝動部の図示省略）、この回転円筒には１°〜２°程度の傾斜角がつけられており、回転によるすべりにより、汚染物は焼成炉１３内を一定時間移動し、排出される。
回転円筒内には汚染物をかきあげるリフター、あるいはパドル羽根が装着されていても良い。
The rotating cylinder is rotationally controlled by the drive motor 20 (the transmission portion is not shown), and the rotating cylinder has an inclination angle of about 1 ° to 2 °. It moves inside for a certain time and is discharged.
A lifter or paddle blade for scrubbing contaminants may be mounted in the rotating cylinder.
燃焼バーナ１５の燃料は重油・灯油・再生油のどれでも良い。
バーナから発生した炎は熱風発生炉１５ａ内で高温熱風に変換され、焼成熱源として作用する。
熱風温度は６００℃以上必要であるが、８００℃以上が好ましい。
また、焼成炉内は低酸素状態に保つことが好ましい。
低酸素状態とは酸素濃度７容量％以下をいう。
The fuel of the
The flame generated from the burner is converted into high temperature hot air in the hot
The hot air temperature needs to be 600 ° C or higher, but is preferably 800 ° C or higher.
Further, it is preferable to keep the inside of the firing furnace in a low oxygen state.
The low oxygen state means an oxygen concentration of 7% by volume or less.
低酸素状態を保つためには燃焼空気送風ファン１９からの送風空気量を減少させることで達成できる。
しかし、送風空気量を減少させると熱風発生炉からのガス温度は上昇し、１２００℃を超えるとほとんどの種類の焼成物は溶融してしまう。
回転円筒型焼成炉は溶融すると、焼成物の搬送に障害を与える。
In order to maintain a low oxygen state, it can be achieved by reducing the amount of air blown from the combustion
However, when the amount of blown air is reduced, the gas temperature from the hot air generating furnace rises, and when it exceeds 1200 ° C., most types of fired products are melted.
When the rotating cylindrical firing furnace melts, it impedes the conveyance of the fired product.
そこで、煙突２４から排気ガスを流入し、酸素濃度の低い燃焼空気を通常の外気と適当な割合で供給することにより、低酸素状態を維持し、熱風発生炉のガス温度の上昇を防止する。
連続酸素濃度分析計２５からのフィードバック信号により自動制御も可能である。
Therefore, exhaust gas is introduced from the
Automatic control is also possible by a feedback signal from the continuous
複合汚染物質は焼成炉１３を通過する間に、ダイオキシン類及びＰＣＢ等の有機塩素化合物は熱分解する。
気化温度の低い重金属類は主に塩化揮発をおこし、汚染物質から分離された排ガスとともに排ガス処理装置へ流入する。
While the composite pollutant passes through the firing
Heavy metals having a low vaporization temperature mainly cause volatilization of chloride and flow into the exhaust gas treatment device together with the exhaust gas separated from the pollutants.
複合汚染物質を分離された焼成処理物は回転円筒から概ね８００℃の品温で排出され、冷却コンベア１６に搬送される。
冷却コンベア搬送中に焼成処理物は１００℃以下に冷却され、焼成品保管場所１７に搬送される。
以上のようにして、ダイオキシン類、ＰＣＢ等の有機塩素化合物、重金属類を含んだ汚染物質を無害化してその残渣を外部に搬出することができる。
また、相乗作用として有機分が燃焼して分離するため、建築・土木資材として利用しやすい形態となる。
The fired product from which the composite contaminants have been separated is discharged from the rotating cylinder at a product temperature of approximately 800 ° C. and is conveyed to the cooling
During the conveyance of the cooling conveyor, the fired product is cooled to 100 ° C. or lower and is transported to the fired
As described above, pollutants containing dioxins, organic chlorine compounds such as PCB, and heavy metals can be rendered harmless and the residue can be carried out to the outside.
In addition, since organic components are burned and separated as a synergistic effect, it is easy to use as a construction / civil engineering material.
排出ガスは二次燃焼室で二次燃焼バーナと二次燃焼ファン１４ａにより制御されながら、高温に例えば８００℃程度まで加熱されることで、その熱風に含まれた有機塩素化合物が完全に燃焼し分解される。
While the exhaust gas is controlled by the secondary combustion burner and the
有機塩素化合物が完全に分解された排出ガスは、その再合成を防ぐために減温器２１で急速減温される。
排ガスは減温水タンク２１ａから流入される減温水をスプレー噴霧することで概ね２００℃以下まで減温される。
The exhaust gas in which the organic chlorine compound has been completely decomposed is rapidly reduced in temperature by the
The exhaust gas is reduced in temperature to approximately 200 ° C. or less by spraying the low temperature water flowing from the low
主に塩化揮発した重金属は排ガスとともに、重油・再生油等の燃料から放出される酸性ガスを中和するために消石灰供給装置２２ａにより中和薬剤をガスと混合し、バグフィルター２２等の高度な集塵機で集塵する。
なお、２２ｃはコンプレッサーを示す。
集塵されたダスト２２ｂは高濃度の重金属が含有されているため、製錬手法や山元還元等の手法にて金属回収を行う原料として利用される。
集塵機を通過したクリーンな排ガスは、送風機２３を用いて煙突２４から大気に放出される。
In order to neutralize the acid gas released from fuels such as heavy oil and regenerated oil, mainly heavy metals that have been volatilized and chlorinated are mixed with neutralizing chemicals by the slaked
Since the collected
Clean exhaust gas that has passed through the dust collector is discharged from the
次に本発明による実施例として、図１の同時無害化システムを小規模（処理能力１０ｋｇ／時間）に構成し、約１００ｋｇの重金属含有焼却主灰と２０ｋｇの焼却飛灰を混合した試料について無害化処理を実施し、焼成品を得た。
Next, as an embodiment according to the present invention, the simultaneous detoxification system of FIG. 1 is configured on a small scale (
原灰と、本発明に係る無害化処理により得られた焼成品の重金属類溶出試験及び含有試験結果を図２に示し、図３に原灰のダイオキシン類分析結果を示し、図４に焼成品（処理後の焼成灰）のダイオキシン類分析結果を示す。
図２から分かるように、汚染された焼却灰・焼却飛灰は本発明による無害化処理により土壌環境基準以下まで有害重金属濃度は低下している。
また、図３と図４の表を比較すると明らかにダイオキシン類が著しく低下している。
Fig. 2 shows the results of elution tests and content tests of raw ash and fired products obtained by detoxification treatment according to the present invention, Fig. 3 shows the results of dioxins analysis of raw ash, and Fig. 4 shows the baked products. The dioxin analysis result of (calcined ash after a process) is shown.
As can be seen from FIG. 2, the contaminated incineration ash / incineration fly ash has a toxic heavy metal concentration lowered to the soil environment standard or less by the detoxification treatment according to the present invention.
Moreover, when the table | surface of FIG. 3 and FIG. 4 is compared, dioxins are falling remarkably clearly.
１ 焼却灰等の原料保管場所（汚染された土壌、底質、粉砕物、沈殿物等含む）
２ 燃焼飛灰等の原料保管場所
３ 振動櫛機
４ 磁選機
５ 破砕機
６ 金属屑保管施設
７ 造粒機
８ 原料貯蔵ピット
９、１０ 投入クレーン
１１ 原料ホッパ
１２ 定量供給装置
１２ａ 油圧ユニット
１２ｂ 投入プッシャー
１２ｃ 上シャッター
１２ｄ 下シャッター
１２ｅ 水冷装置
１３ 焼成炉
１４ 二次燃焼バーナ
１４ａ 二次燃焼ファン
１５ 燃焼バーナ
１６ 冷却コンベア
１７ 焼成品（建築、土木資材の原料）
１８ 重油タンク
１９ 燃焼ファン
２０ 駆動モーター
２１ 減温器
２１ａ 減温水タンク
２１ｂ 飛灰回収保管ボックス
２２ バグフィルター
２２ａ 消石灰供給フィーダー
２２ｂ 飛灰回収保管ボックス（ダスト）
２２ｃ コンプレッサー
２３ 送風機
２４ 煙突
２５ 酸素濃度計
1 Raw material storage place for incineration ash (including contaminated soil, sediment, crushed material, sediment, etc.)
2 Raw material storage place such as
18
Claims (5)
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| JP2003373700A JP4350485B2 (en) | 2003-10-31 | 2003-10-31 | Method and apparatus for firing and detoxifying multiple / mixed contaminants |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003373700A JP4350485B2 (en) | 2003-10-31 | 2003-10-31 | Method and apparatus for firing and detoxifying multiple / mixed contaminants |
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| JP2005131615A true JP2005131615A (en) | 2005-05-26 |
| JP4350485B2 JP4350485B2 (en) | 2009-10-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124527A1 (en) | 2006-05-03 | 2007-11-08 | Ash Dec Umwelt Ag | Thermal process for separating off heavy metals from ash in agglomerated form |
| JP2010259975A (en) * | 2009-04-30 | 2010-11-18 | Toru Kubota | Device for cleaning contaminated soil |
| CN104084420A (en) * | 2014-06-26 | 2014-10-08 | 南京农业大学 | Method for simultaneously repairing heavy metals and polycyclic aromatic hydrocarbons in soil by roasting |
| JP2016147243A (en) * | 2015-02-13 | 2016-08-18 | 太平洋セメント株式会社 | Heavy metal insolubilization method in fluid-bed fly ash, and manufacturing method of construction material having insolubilized heavy metal |
| CN111825425A (en) * | 2020-07-07 | 2020-10-27 | 广州市第一市政工程有限公司 | Method and equipment for repairing and safely utilizing organic contaminated soil |
| JP2022508878A (en) * | 2019-08-19 | 2022-01-19 | 中南大学 | Pre-chlorination-sintering process for high chlorine metallurgical waste and incinerator fly ash |
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2003
- 2003-10-31 JP JP2003373700A patent/JP4350485B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124527A1 (en) | 2006-05-03 | 2007-11-08 | Ash Dec Umwelt Ag | Thermal process for separating off heavy metals from ash in agglomerated form |
| JP2010259975A (en) * | 2009-04-30 | 2010-11-18 | Toru Kubota | Device for cleaning contaminated soil |
| CN104084420A (en) * | 2014-06-26 | 2014-10-08 | 南京农业大学 | Method for simultaneously repairing heavy metals and polycyclic aromatic hydrocarbons in soil by roasting |
| JP2016147243A (en) * | 2015-02-13 | 2016-08-18 | 太平洋セメント株式会社 | Heavy metal insolubilization method in fluid-bed fly ash, and manufacturing method of construction material having insolubilized heavy metal |
| JP2022508878A (en) * | 2019-08-19 | 2022-01-19 | 中南大学 | Pre-chlorination-sintering process for high chlorine metallurgical waste and incinerator fly ash |
| JP7204156B2 (en) | 2019-08-19 | 2023-01-16 | 中南大学 | Pre-dechlorination and sintering process for highly chlorinated metallurgical waste and incineration fly ash |
| CN111825425A (en) * | 2020-07-07 | 2020-10-27 | 广州市第一市政工程有限公司 | Method and equipment for repairing and safely utilizing organic contaminated soil |
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