JPH08168694A - Method of recovering valuable object from sludge of burned trash - Google Patents

Method of recovering valuable object from sludge of burned trash

Info

Publication number
JPH08168694A
JPH08168694A JP7169065A JP16906595A JPH08168694A JP H08168694 A JPH08168694 A JP H08168694A JP 7169065 A JP7169065 A JP 7169065A JP 16906595 A JP16906595 A JP 16906595A JP H08168694 A JPH08168694 A JP H08168694A
Authority
JP
Japan
Prior art keywords
fraction
sludge
particles
coarse
screen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7169065A
Other languages
Japanese (ja)
Other versions
JP3701347B2 (en
Inventor
Markus Buergin
ビュルギン マルクス
Verena Dr Schmidt
シュミット フェレナ
Franz-Georg Dr Simon
ジモン フランツ−ゲオルク
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.)
ABB RES Ltd
ABB Research Ltd Sweden
Original Assignee
ABB RES Ltd
ABB Research Ltd Sweden
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 ABB RES Ltd, ABB Research Ltd Sweden filed Critical ABB RES Ltd
Publication of JPH08168694A publication Critical patent/JPH08168694A/en
Application granted granted Critical
Publication of JP3701347B2 publication Critical patent/JP3701347B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets
    • B03B9/04General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags

Landscapes

  • Processing Of Solid Wastes (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

PROBLEM TO BE SOLVED: To make a coarse fraction other than a fine fraction containing the greater part of a residual harmful substance suitable for a building material or the accumulation of a waste refuse disposable yard by roughly purifying a waste refuse incineration sludge immediately after discharged from a furnace without precooling the same and dividing the same into at least two fine and coarse fractions. SOLUTION: The dry sludge fed out of an incinerator is transported into a post-treatment apparatus to be allowed to reach a rod-shaped screen at first to mechanically separate too large particles. Next, this roughly screened substance is advanced on a 2 mm screen operated electromagnetically to separate a fine fraction to reduce dust addition capacity for a succeeding treatment process. This fraction contains up to 90% of a harmful substance contained in the coarse sludge. Next, a >2 mm coarse fraction is sent to a perforated screen with a perforation size of 25-35 mm and the overflow component from the screen is passed through a reading plane to separate non-combustion matter and obstruction matter. Subsequently, the rough fraction is ground by a hammer mill to obtain valuables from which dust particles are removed.

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】本発明は、粗製スラッジを炉
からの退出後に直接かつ水浴中で予め冷却せずに荒清浄
化(Grobreinigung)に送り込み、乾燥されかつ荒清浄
化されたスラッジを少なくとも2つの画分に分割し、か
つ2mm未満である全ての粒子を第一画分に配分し、残
りの粒子を第二画分に配分する塵芥焼却スラッジからの
有価物の回収法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to at least 2 sludges that have been dried and rough cleaned by leaving the crude sludge directly after exiting the furnace and without prior cooling in a water bath to Grobreinigung. The present invention relates to a method for recovering valuable substances from refuse incineration sludge, which is divided into one fraction and all particles smaller than 2 mm are distributed to the first fraction and the remaining particles are distributed to the second fraction.

【0002】[0002]

【従来の技術】住宅地のごみの焼却の場合、残留物質と
して塵芥1トン当たりスラッジ約250kgが生じる。
生じたスラッジは、炉の直後で有害物質の含量を有し、
この有害物質はスラッジを、例えば建築材料として更に
使用することを妨げる。ごみ処分場でのスラッジの堆積
は、何ら特別な対策、例えば浸透水の捕集を行わない場
合には、環境を脅かすことになる。
2. Description of the Related Art When incinerating refuse from residential areas, about 250 kg of sludge is generated as a residual substance per ton of dust.
The resulting sludge has a content of harmful substances immediately after the furnace,
This harmful substance prevents further use of the sludge, for example as a building material. Accumulation of sludge at the landfill would threaten the environment if no special measures were taken, such as the collection of seepage water.

【0003】通常、このスラッジは、炉からの退出直後
にスラッジ脱水装置中で冷却される。この場合、スラッ
ジ中の重金属含量の低下が生じる。しかしながら、この
ことでは、不十分であり、スラッジ中の有毒物質の著し
い含量が残留している。
Usually, this sludge is cooled in a sludge dewatering unit immediately after leaving the furnace. In this case, the heavy metal content in the sludge is reduced. However, this is not sufficient and leaves a significant content of toxic substances in the sludge.

【0004】ところで、欧州特許第0372039号明
細書には、初めて塵芥焼却炉からのスラッジを後処理す
るための1つの加工の方法が呈示されており、この場
合、スラッジは、炉の直後に水浴中で予め冷却せずに荒
清浄化(燃焼しなかった粗大物および磁性部材の除去)
に送り込まれる。この後、荒清浄化されたスラッジは、
少なくとも2つの画分に分割され、かつ1つの画分に、
2mm未満である全ての粒子が配分される。
By the way, European Patent No. 0372039 presents for the first time one processing method for post-treating sludge from a refuse incinerator, in which case the sludge is immediately after the furnace in a water bath. Rough cleaning without cooling in advance (removal of coarse materials and magnetic members that did not burn)
Sent to. After this, the sludge that was rough cleaned was
Divided into at least two fractions, and into one fraction,
All particles that are less than 2 mm are distributed.

【0005】前記の公知方法には、微細画分が、本来ス
ラッジの退出の際にスラッジ中に含有されている有害物
質の大部分を含有するという認識が根底にある。この微
細画分は、粗大画分と比較して量的に僅かであり、選別
処理に送り込まれなければならない。これとは異なりこ
の粗大画分は、建築材料としての直接の使用またはごみ
処分場での堆積に適している。スラッジ有価物以外の有
価物の回収のための示唆は、欧州特許第0337203
9B1号明細書からは読み取れない。
The above-mentioned known method is based on the recognition that the fine fraction contains most of the harmful substances contained in the sludge when it originally exits the sludge. This fine fraction is quantitatively small compared to the coarse fraction and must be sent to the sorting process. This coarse fraction, on the other hand, is suitable for direct use as a building material or for deposits at landfills. Suggestions for recovering valuables other than sludge valuables are described in EP 0337203.
It cannot be read from the 9B1 specification.

【0006】[0006]

【発明が解決しようとする課題】特許請求の範囲で特徴
付けられているように本発明には、出発物質に、乾燥し
た搬出されたスラッジを最適に適合させ、かつ有価物の
回収を前面に立てる冒頭に記載された種類の方法を記載
するという課題が課されている。
The present invention, as characterized in the claims, optimally adapts the dried, discharged sludge to the starting material and brings the recovery of valuables to the front. The task is to describe a method of the kind mentioned at the outset.

【0007】[0007]

【課題を解決するための手段】本発明の利点は、殊に、
不活性物質とともに、例えば建築材料の品質でのスラッ
ジは、鉄、非鉄金属、就中、アルミニウムおよび銅を、
重金属負荷されたより微細な物質と分離することができ
ることにある。次に、全重量の約30%になるだけの前
記の重金属負荷されたより微細な物質は、選別処理に送
り込むことができる。
The advantages of the present invention are
With inert substances, for example sludge in the quality of building materials, ferrous, non-ferrous metals, among others, aluminum and copper,
It is able to separate heavy metals loaded finer substances. Then, the said heavy metal-loaded finer substances, which make up only about 30% of the total weight, can be sent to the sorting process.

【0008】[0008]

【発明の効果】焼却炉からのスラッジの乾燥搬出によっ
て、有価物は、無機物質の付着を十分に免れている。ま
た、このことによって、典型的にCaO10〜15%を
含有するアルカリ性のスラッジと水との間の化学反応進
行、例えば金属アルミニウムの酸化は回避される。
EFFECTS OF THE INVENTION By carrying out the sludge from the incinerator by drying, the valuable material is sufficiently free from the adhesion of the inorganic substance. This also avoids the progress of chemical reactions between alkaline sludge, which typically contains 10-15% CaO, and water, for example the oxidation of metallic aluminum.

【0009】本発明および本発明により達成可能な利点
は、以下に実施例に基づき詳細に説明される。
The invention and the advantages achievable with it are explained in more detail below on the basis of examples.

【0010】[0010]

【実施例】燃焼装置から乾燥搬出されたスラッジを、図
中に略示されたスラッジ後処理装置中へ運搬し、このス
ラッジ後処理装置中で、まず、棒状篩(Stangensieb)
中に到達させ、この棒状篩中で過大粒状物(300mm
を上廻る物質)を機械的に分離する。これによって、後
続の篩の負荷および損傷を回避することができる。
[Example] The sludge dried and carried out from the combustor is conveyed to a sludge post-treatment device schematically shown in the figure, and in the sludge post-treatment device, first, a rod-shaped sieve (Stangensieb)
To reach inside and oversize the granular material (300 mm
Material that exceeds the above) is mechanically separated. This makes it possible to avoid subsequent sieve loading and damage.

【0011】次に、この荒く篩別した物質を、電磁的に
運転される2mmの篩上に進行させる。こうして、微細
含分を分離し、ひいては後続の処理工程のためのダスト
付加容量を減少させる。この微細含分は、冒頭に引用さ
れた欧州特許第0372039B1号明細書の教示によ
れば、粗製スラッジ中に含有されている有害物質の90
%までの分を含有する。この微細含分を、選別処理に送
り込む。
The coarsely screened material is then advanced over an electromagnetically operated 2 mm screen. In this way, the fines are separated, and thus the dust loading capacity for subsequent processing steps is reduced. According to the teaching of EP 0 372 039 B1 cited at the outset, this fine content is equal to 90% of the harmful substances contained in the crude sludge.
Contains up to%. This fine content is sent to the sorting process.

【0012】次の工程の場合、>2mmの粗大含量を、
典型的に32mmの孔径を有する孔篩、好ましくは振動
篩に送り込む。篩からの溢流を読取り平面(Leseeben
e)に導通させ、この読取り平面中で不燃焼物(木材、
紙)並びに妨害物、例えば電気モーター、小型変圧器、
電磁石、コイル等を分離する。この場合、鉄とともに別
の金属、殊に銅を含有する妨害物の除去は、この種の対
象物が、後の磁気的分離の際に、通常、鉄画分に配分さ
れ、このことが、鉄画分の品質を低下させるので、特に
重要である。
For the next step, a coarse content of> 2 mm
Feed through a sieve, typically having a pore size of 32 mm, preferably a vibrating sieve. Read the overflow from the screen (Leseeben
e) and the non-combustible material (wood,
Paper) and obstructions such as electric motors, small transformers,
Separate the electromagnet and coil. In this case, the removal of obstructions containing other metals, especially copper, together with iron is such that objects of this kind are usually distributed during the subsequent magnetic separation to the iron fraction, which It is especially important as it reduces the quality of the iron fraction.

【0013】引続き、この物質を、ハンマーミル中で粉
砕する。超高周波磁性体(Ueberbandmagneten)を用い
て更に鉄を分離する。スラッジの乾燥搬出およびハンマ
ーミル中での加工によって、鉄は、付着するダスト粒子
が十分に除去されており、ひいては品質的に高価値であ
る。この粉砕されかつもはや実際に鉄不含の物質を32
mmの孔篩の上に返送する。
The material is subsequently ground in a hammer mill. Further separation of iron using ultra high frequency magnet (Ueberband magneten). Iron is of high quality because the dust particles adhering to it are sufficiently removed by the dry discharge of sludge and the processing in a hammer mill. 32 of this ground and no longer iron-free material
Return on mm mm sieve.

【0014】この32mmの孔篩の篩別により、ミル中
で、例えばボールミルまたは振動破砕機(Oszillatorbr
echer)中で選択的に2つの画分に分割される。この場
合、灰状の重金属負荷された物質は粉砕されるが、しか
し、不活性物質、例えばガラス、セラミック、粘土、石
等は、本質的に粉砕されずにこの工程を去る。
By sieving this 32 mm hole sieve, in a mill, for example a ball mill or a vibration crusher (Oszillatorbr).
Echer) selectively divided into two fractions. In this case, the ash-like heavy metal-loaded material is ground, but the inert materials, such as glass, ceramics, clays, stones, etc., leave this process essentially unground.

【0015】物質流を、ミルに向かって磁性体分離器に
導通させ、この磁性体分離器中で、再度、高い効率で鉄
を分離する。
The material stream is passed through a magnetic separator towards the mill, in which the iron is again separated with high efficiency.

【0016】次に、双方の粒画分を磁性体分離器の後方
で網篩(Spannwellensieb)の上で分離する。2mmを
下廻る粒度を有する負荷された微細含分を、好ましく
は、第一の孔篩からの微細含分と一緒に、例えば凝固ま
たは溶融によって後加工する。粗大画分から、非鉄金属
(Al、Cu等)を有価物として、例えば渦動流セパレ
ータを用いて分離する。分離された金属の品質は、粗製
スラッジの乾燥スラッジ搬出により極めて良好である。
例えば、道路の建設に再使用することができる不活性物
質が残留する。
Next, both particle fractions are separated behind a magnetic separator on a mesh screen (Spannwellensieb). The loaded fines with a particle size of less than 2 mm are preferably worked up together with the fines from the first-pore sieve, for example by solidification or melting. Nonferrous metals (Al, Cu, etc.) are separated from the coarse fraction as valuables, for example, by using a vortex flow separator. The quality of the separated metal is very good due to the dry sludge discharge of the crude sludge.
For example, there remains an inert material that can be reused for road construction.

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

【図1】乾燥搬出された塵芥焼却スラッジからの有価物
の回収のための個々の構造単位から構成された装置を略
示する系統図。
FIG. 1 is a system diagram schematically showing an apparatus composed of individual structural units for recovery of valuables from waste sludge incineration sludge that has been dried and carried out.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】粗製スラッジを炉からの退出後に直接かつ
水浴中で予め冷却せずに荒清浄化に送り込み、乾燥され
かつ荒清浄化されたスラッジを少なくとも2つの画分に
分割し、かつ2mm未満である全ての粒子を第一画分に
配分し、残りの粒子を第二画分に配分する塵芥焼却スラ
ッジから有価物を回収するための方法において、第二画
分を第二画分の側で篩別工程で少なくとも2つの画分に
分割し、かつ25〜35mmである全ての粒子を第三画
分に配分し、かつ残りの粒子を第四画分に配分すること
を特徴とする、塵芥焼却スラッジからの有価物の回収
法。
1. The crude sludge is fed directly after leaving the furnace directly into a rough cleaning without cooling in a water bath and the dried and rough cleaned sludge is divided into at least two fractions and 2 mm. In the method for recovering valuables from refuse incineration sludge, which allocates all particles that are less than 1 to the first fraction and allocates the remaining particles to the second fraction, the second fraction is divided into the second fraction. Characterized in that it is divided into at least two fractions on the side in a sieving step and all particles which are between 25 and 35 mm are distributed to the third fraction and the remaining particles are distributed to the fourth fraction. , A method of recovering valuable materials from refuse incineration sludge.
【請求項2】 第三画分の加工が進む過程で実施された
鉄の分離の後に新たな篩別を行い、この篩別の際に<2
mmの微細含分を分離し、かつ第一画分の粒子と一緒に
後加工し、好ましくは、凝固させるかまたは溶融させ
る、請求項1に記載の方法。
2. A new sieving is carried out after the separation of iron carried out in the process of processing the third fraction, and <2
2. The process according to claim 1, wherein the fine fraction of mm is separated and post-processed with the particles of the first fraction, preferably solidified or melted.
【請求項3】 渦動流セパレータ中で、非鉄金属の溢流
が放出される、請求項2に記載の方法。
3. The method of claim 2, wherein a non-ferrous metal overflow is discharged in the vortex flow separator.
【請求項4】 第四画分を読取り平面に導通させ、この
読取り平面で、不燃焼物および別の妨害物を分離し、こ
の後、この物質を機械的に粉砕し、更に存在する鉄分を
選別し、こうして妨害物および鉄分を含まない物質を篩
別工程に返送する、請求項1に記載の方法。
4. A fourth fraction is passed through a reading plane, at which reading the unburned material and other obstructions are separated, after which the material is mechanically comminuted and any further iron present. 2. The method according to claim 1, wherein the screening and thus returning the substances which are free of obstructions and iron to the sieving step.
JP16906595A 1994-07-07 1995-07-04 Recovery of valuable materials from incineration sludge Expired - Lifetime JP3701347B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4423927A DE4423927A1 (en) 1994-07-07 1994-07-07 Process for recovering valuable materials from waste incineration slag
DE4423927.0 1994-07-07

Publications (2)

Publication Number Publication Date
JPH08168694A true JPH08168694A (en) 1996-07-02
JP3701347B2 JP3701347B2 (en) 2005-09-28

Family

ID=6522529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16906595A Expired - Lifetime JP3701347B2 (en) 1994-07-07 1995-07-04 Recovery of valuable materials from incineration sludge

Country Status (4)

Country Link
EP (1) EP0691160B1 (en)
JP (1) JP3701347B2 (en)
AT (1) ATE199326T1 (en)
DE (2) DE4423927A1 (en)

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Also Published As

Publication number Publication date
EP0691160B1 (en) 2001-02-28
DE4423927A1 (en) 1996-01-11
EP0691160A1 (en) 1996-01-10
JP3701347B2 (en) 2005-09-28
DE59509047D1 (en) 2001-04-05
ATE199326T1 (en) 2001-03-15

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