EP0300396A2 - Procédé de traitement thermique des déchets et dispositif pour la mise en oeuvre de ce procédé - Google Patents

Procédé de traitement thermique des déchets et dispositif pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0300396A2
EP0300396A2 EP88111479A EP88111479A EP0300396A2 EP 0300396 A2 EP0300396 A2 EP 0300396A2 EP 88111479 A EP88111479 A EP 88111479A EP 88111479 A EP88111479 A EP 88111479A EP 0300396 A2 EP0300396 A2 EP 0300396A2
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EP
European Patent Office
Prior art keywords
slag
waste
combustion
dust
furnace
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Withdrawn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
EP88111479A
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German (de)
English (en)
Other versions
EP0300396A3 (fr
Inventor
Helmut Dr. Ringel
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.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Kernforschungsanlage Juelich GmbH
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 Forschungszentrum Juelich GmbH, Kernforschungsanlage Juelich GmbH filed Critical Forschungszentrum Juelich GmbH
Publication of EP0300396A2 publication Critical patent/EP0300396A2/fr
Publication of EP0300396A3 publication Critical patent/EP0300396A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/085—High-temperature heating means, e.g. plasma, for partly melting the waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam

Definitions

  • the invention relates to a method for the thermal treatment of waste, in particular special waste, in which the waste is fed to a combustion chamber and is burned there with the production of slag and flying dust, the flying dust carried out with the exhaust gas subsequently being separated off. Furthermore, the invention relates to a device for carrying out this method with a combustion furnace with combustion gas supply, a furnace feed device for introducing the waste, an exhaust pipe, a slag discharge and with a separating device for separating at least part of the fly ash from the exhaust gas.
  • waste incineration plants The thermal treatment of waste usually takes place in so-called waste incineration plants. There, the waste is fed into combustion chambers and burned with slag, exhaust gas and flue dust.
  • the exhaust gas contains the combustion products H2O and CO2 as well as other pollutants, such as. B. hydrocarbons and traces of heavy metals.
  • the flying dust is filtered out of the exhaust gas and deposited as a residue. The same applies to the salts that occur during exhaust gas purification. Halogens fall as pollutants, the rest Hydrocarbons as well as the volatile heavy metals and as main components the slag formers.
  • Waste incineration plants from KHD Humboldt Wedag AG, D-5000 Cologne are known for the thermal treatment of special waste, in which the comminuted waste is burned in a combustion chamber with the help of technical oxygen and waste oil at temperatures of more than 1600 ° C.
  • the consequence of this is that all organic components or pollutants are decomposed and transferred into the exhaust gas.
  • the resulting slags are collected in an under furnace and are then landfillable or suitable for use in civil engineering.
  • the pollutants in the exhaust gas are removed by an electrostatic filter and by a wet scrubber with cold traps and activated carbon absorber.
  • the waste heat generated is used to heat a medium, which is then fed to a two-stage turbine to generate electricity.
  • a disadvantage of the known method for the thermal treatment of waste is the fact that large amounts of flying dust are generated, which are carriers of pollutants, in particular of volatile heavy metals. They can only be disposed of in hazardous waste or underground landfills. However, this is not a satisfactory solution, since long-term environmental damage cannot be ruled out.
  • the invention has for its object to find a method in which much smaller amounts of dust contaminated with heavy metals accumulate and which opens up the possibility of recovering the heavy metals. Another object is to provide an apparatus for performing this method.
  • this object is achieved according to the invention in that the fly dust is divided into a coarse dust fraction and a fine dust fraction and only the coarse dust fraction is incorporated into the liquid slag with evaporation of the adhering, volatile pollutants, while the pollutants adhering to the fine dust fraction are recovered will.
  • a fly dust recycling is carried out, in which the fly dust accumulated is partially returned to its place of origin and is integrated there into the slag resulting from the incineration of the waste.
  • the temperature and the dwell time of the slag can be set so that the volatile pollutants adhering to the returned fly dust practically completely gasify, so that essentially only the mineral dust portion of the fly ash remains in the slag and leaves the incinerator with the slag.
  • the volatile pollutants released in this way accumulate again on the flying dust when the exhaust gas cools, in particular on the fine dust particles.
  • These fine dust particles are collected in accordance with the preferred embodiment of the invention, their amount being comparatively small.
  • the adherent to it Pollutants are recovered so that there is practically no more pollutant dust.
  • the division into coarse and fine dust fractions takes place with a particle size of 50 ⁇ m.
  • the division can be carried out using bag filters, cyclones and / or electrostatic filters, but also with other separation devices.
  • the exhaust gas with the fine dust fraction is subjected to a wet-physical and / or wet-chemical separation and the fine dust fraction is thereby separated into heavy metals and slag fractions.
  • the separation can be carried out in such a way that the water of combustion condenses in the exhaust gas and the fine dust fraction is washed out of the exhaust gas and the condensate is then distilled, the heavy metals being recovered from the distillate residue.
  • the CO2-H2O mixture is separated by condensing out the H2O fraction, whereby the largest proportion of fine dust with deposited heavy metals, any heavy metal vapors, HCL and SO2 are separated.
  • the incorporation of the returned coarse dust fraction into the liquid slag can be done in different ways.
  • the returned dust can go directly into the combustion chamber is inserted and integrated into the liquid slag. This can be done by inflating the recycled flying dust onto the liquid slag. It is also expedient if the returned fly dust is introduced into such a hot combustion zone within the combustion chamber that the particles at least become doughy, that is to say they stick together and precipitate out as enlarged particles.
  • the returned flue dust can also be added to the waste before the combustion chamber and introduced into the combustion chamber with it.
  • the slag in the combustion chamber is kept liquid over a longer period of time until the pollutants have evaporated as far as possible, this period of time being able to be more than one hour.
  • the actual pollutants - which are soluble in the landfill - are expelled.
  • this ensures that the volatile heavy metals introduced into the slag with the returned fly dust are gasified.
  • the temperature in the combustion chamber in particular in the area of slag formation, is kept above 1200 ° C., preferably in the range of 1350 ° C.
  • additional metallurgical process steps are used, such as, for example, freshening with oxygen and / or with chlorine-containing gas.
  • the combustion of the waste in the combustion chamber is expediently carried out in two stages, the waste being burned and gasified in the first stage with the formation of liquid slag and exhaust gas, and the exhaust gas being completely burned in the second stage by further addition of combustion gas.
  • the liquid slag that was more or less well burned out in the first combustion stage is kept liquid in the second stage. In this way, the dwell times necessary to drive out the volatile heavy metals introduced into the slag with the returned flying dust can be easily achieved.
  • the slag transport through the combustion chamber can be supported if the slag is subjected to pivoting movements of the combustion chamber about a longitudinal axis.
  • the object set out is achieved in that a return device for returning a separated coarse dust fraction of the fly dust into the incinerator is provided between the separating device and the incinerator and that at least one separating stage is provided behind the separating device for recovering the pollutants adhering fine dust fraction passing the separating device.
  • a condenser for separating the combustion water with the fine dust fraction and a distillation device for subsequent evaporation of the combustion water are proposed. This still can be designed, for example, as a rectification column.
  • the distillate residue from the distillation device is preferably separated into slag portions and heavy metals.
  • the return device can alternatively be designed such that it is connected on the one hand to the combustion furnace or on the other hand to the furnace supply device. In the former case, it is expedient to let the return device open in the area of the combustion gas supply, since the highest temperatures prevail here, and this causes the flying dust to become doughy.
  • the return device can additionally be equipped with a pelletizing and / or pressing device in order to make the returned flying dust lumpy before it enters the incinerator.
  • the combustion gas supply is provided with a device for supplying technically pure oxygen.
  • the incinerator As far as the design of the incinerator is concerned, it is expedient to divide it into two furnace chambers located one behind the other, with the combustion gas being supplied primarily in the first furnace chamber.
  • the furnace chambers are divided by a partition that leaves a passage in the region of the furnace chamber sole. A further supply of combustion gas can take place in the area of the partition.
  • a gas burner for heating the slag is arranged in the area of the slag discharge. It supports the burnout of the Slag and thus the expulsion of volatile pollutants from it.
  • a slag collection pot should be arranged in the slag discharge, through which the liquid slag can then be led out.
  • the slag collecting pot can be provided with a stirring device and / or a heating device in order to be able to circulate the slag and keep it liquid.
  • the incinerator have auxiliary burners for maintaining a temperature of at least 800 ° C, which is particularly necessary when the combustion gases are exclusively technical oxygen.
  • the bottom of the incinerator should be inclined downwards at least in the front area. It is also proposed that the incinerator be suspended pivotably about a longitudinal axis, which serves the same purpose. Alternatively or even in combination with this, pivotability about the transverse axis can also be provided. If the furnace feed device and the exhaust pipe are coaxial with one another, the longitudinal axis about which the combustion furnace can be pivoted should also run coaxially with it.
  • the furnace feed device be provided with an entrance lock for the waste. It should have a relatively small volume and be provided with a vacuum device for extracting the air in the entrance lock in the closed state. Furthermore, a flushing device should be provided for the supply of CO2 in the entrance lock and also in the entire subsequent furnace feed pipe.
  • the exhaust pipe is provided with a cooling device.
  • the exhaust gas heat can be used to generate steam, with the aid of which turbines can be operated to generate electrical energy.
  • the waste incineration plant shown in FIG. (1) has an incinerator (1) which has an oven feed device (2) on the input side and an exhaust pipe (3) and a slag discharge (4) in the area of the output side. It is divided into two furnace chambers (5, 6), the division taking place through a partition (7) which does not reach the bottom of the furnace chambers (5, 6).
  • a primary oxygen supply (8) opens into the first furnace chamber (5), while a secondary oxygen supply (9) is provided in the region of the partition (7).
  • the Incinerator (1) is suspended in bearings (10, 11) so that it can pivot about its longitudinal axis, these bearings (10, 11) also being able to move vertically, so that the incinerator (1) can be adjusted about a transverse axis.
  • the maximum swivel angle around the longitudinal axis is 30 °.
  • the exhaust gas emerging from the combustion furnace (1) into the exhaust pipe (3) passes through an exhaust pipe coupling (12) and reaches an exhaust gas cooler (13), where it is cooled down from over 1200 ° C to about 200 ° C. It then enters a bag filter (14) in which the fly dust conveyed with the exhaust gas is divided into a coarse and a fine dust fraction.
  • the limit should be around 50 ⁇ m grain.
  • a cyclone can also be used, especially with larger amounts of exhaust gas.
  • the coarse dust fraction is carried away downwards and is mixed with the waste before the furnace feed device (2), if necessary after a pelleting and pressing process. With the waste, the coarse dust fraction then returns to the incinerator (1), where it is incorporated into the liquid slag.
  • the fine dust fraction only forms a small part of the total fly dust, but is nevertheless strongly enriched with volatile heavy metals, since heavy metals accumulate in particular in the finest grain fractions smaller than 20 ⁇ m.
  • the fine dust fraction loaded in this way is introduced into a condenser (15), where it is cooled to a temperature of 10 ° C.
  • the combustion water condenses out, whereby the largest proportion of fine dust enriched with heavy metals, heavy metal vapors, HCl and SO2 are separated.
  • the remaining exhaust gas consisting essentially of CO2, CO, H2 and N2 can then be further purified in a distillation column, the non-condensable residual gases CO, H2 and N being produced, while CO2, possibly initially still contaminated with SO2, remains in the sump.
  • the result is a pure H2O top product and a bottom product made from HCl acid with dissolved heavy metals and undissolved fine dust.
  • the remaining amount of filter dust is only insignificant.
  • the heavy metal components can be recovered by further chemical separation processes, so that ultimately only residues that can be deposited remain from the dust.
  • the combustion furnace (1) with the first furnace chamber (5) and the second furnace chamber (6) shown in more detail in the figures (2) and (3) has a wall consisting of an outer sheet metal jacket (17), a rock wool lining (18) and on the inside of a furnace wall (19) consists of refractory bricks.
  • the combustion in the two furnace chambers (5, 6) can be observed through two shielded windows (20, 21).
  • the primary oxygen supply (8) takes place through three nozzles in the side walls of the incinerator (1), namely slightly above the bottom (22) of the first furnace chamber (5), which runs obliquely downwards.
  • the secondary oxygen supply (9) takes place in the area of the partition (7) and causes a complete combustion of the exhaust gases generated in the second furnace chamber (6).
  • Back-up burners (23, 24) are also provided, specifically the first back-up burner (23) in the region of the top of the first Furnace chamber (5) and the second support burner (24) in the area of the slag discharge (4).
  • the support burners (23, 24) are used to heat the furnace before incinerating the waste, because for safety reasons the furnace interior must always be kept at at least 600 ° C when burning, since an explosive gas mixture cannot form above this temperature.
  • the furnace feed device (2) has a filling funnel (25) and a garbage inlet lock (26). This consists of a vertically extending tube with two slides (27, 28) arranged one above the other at a distance, the movement of which is indicated by the double arrows C, D. After opening the first slide (27), as much garbage can be filled in until the space between the two slides (27, 28) is filled. After closing the upper slide (27), the air is sucked out of the garbage inlet lock (26) and CO2 is flushed in. CO2 is also introduced into the horizontal input tube (29) adjoining the garbage inlet lock (26). Only then is the lower slide (28) opened so that the waste can fall into the input tube (29). Here it is pushed into the incinerator (1) using a pestle (30). So that the input tube (29) does not heat up too much, a cooling device (31) is additionally provided.
  • the waste slides down in the incinerator (1) due to the inclination of the sole (22), whereby it is also pushed forward by subsequent waste.
  • the waste is heated, dried, degassed, gasified and burned.
  • the combustion zone is predetermined by the location of the primary oxygen supply (8) and can be influenced by a corresponding inflow control.
  • the slag resulting from the combustion flows via a slag channel (32) into a slag pot (33) which is arranged in the slag discharge (4).
  • An electrical heating coil (34) is provided in the area of the slag pot (33). The slag pot (33) can be moved downwards from the slag discharge (4) after the air has been sealed off.
  • the slag transport is not only promoted by the inclination of the slag channel (32), but also by the possibility already described above of being able to pivot the incinerator (11) about two axes.
  • the incinerator (1) is rotatably suspended in the bearings (10, 11) via the input pipe (29) or the exhaust pipe (3). It can therefore be pivoted through an angle of 30 ° about a longitudinal axis passing through the input pipe (29) and the exhaust pipe (3).
  • the exhaust pipe (3) is also provided with a cooling device (35) so that it does not reach excessively high temperatures.
  • the connection of the rotatably mounted part of the exhaust pipe (3) with the stationary part is done via the exhaust pipe coupling (36).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)
  • Fire-Extinguishing Compositions (AREA)
EP88111479A 1987-07-24 1988-07-16 Procédé de traitement thermique des déchets et dispositif pour la mise en oeuvre de ce procédé Withdrawn EP0300396A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3724563 1987-07-24
DE19873724563 DE3724563A1 (de) 1987-07-24 1987-07-24 Verfahren zur thermischen behandlung von abfaellen sowie vorrichtung zur durchfuehrung dieses verfahrens

Publications (2)

Publication Number Publication Date
EP0300396A2 true EP0300396A2 (fr) 1989-01-25
EP0300396A3 EP0300396A3 (fr) 1990-01-31

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EP88111479A Withdrawn EP0300396A3 (fr) 1987-07-24 1988-07-16 Procédé de traitement thermique des déchets et dispositif pour la mise en oeuvre de ce procédé

Country Status (4)

Country Link
US (1) US4915039A (fr)
EP (1) EP0300396A3 (fr)
JP (1) JPS6449578A (fr)
DE (1) DE3724563A1 (fr)

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DE4026245A1 (de) * 1990-08-18 1992-02-20 Hpm Technocommerz Technologie Verfahren zur thermischen behandlung von abfaellen und reststoffen
EP0647816A1 (fr) * 1993-10-09 1995-04-12 Giovanni Albertazzi Installation d'élimination des résidus toxiques
EP0651204A1 (fr) * 1993-11-03 1995-05-03 Hans Dr. Reimer Combustion à haute température et à plusieurs étages de matières résiduaires avec constituants inertes et dispositif pour la mise en oeuvre de ce procédé
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US5976488A (en) 1992-07-02 1999-11-02 Phoenix Environmental, Ltd. Process of making a compound having a spinel structure
EP1108955A1 (fr) * 1998-08-27 2001-06-20 Kinsei Sangyo Co., Ltd. Procede d'elimination de dechets par incineration
EP0489867B2 (fr) † 1989-09-21 2005-08-17 Phoenix Environmental, Ltd. Procede et appareil pour rendre les dechets solides non nuisibles pour l'environnement par l'utilisation de la chaleur
CN111360041A (zh) * 2020-04-13 2020-07-03 台州椒江行陈环保科技有限公司 一种铝电解工业中碳渣回收利用装置

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US5188649A (en) * 1991-08-07 1993-02-23 Pedro Buarque de Macedo Process for vitrifying asbestos containing waste, infectious waste, toxic materials and radioactive waste
DE4207265A1 (de) * 1992-03-07 1993-09-09 Bmd Garant Entstaubungstechnik Verfahren zum umwandeln von filterstaeuben
US5353718A (en) * 1992-11-03 1994-10-11 The Babcock & Wilcox Company Remediation of low level radioactive mixed waste in a fluidized bed incinerator
US5309850A (en) * 1992-11-18 1994-05-10 The Babcock & Wilcox Company Incineration of hazardous wastes using closed cycle combustion ash vitrification
DE4443088C1 (de) * 1994-12-03 1996-05-09 Metallgesellschaft Ag Verfahren zum Entsorgen von Reststoffen aus Abfallverbrennungsanlagen sowie Aktivkoks und/oder Aktivkohle
US5678236A (en) * 1996-01-23 1997-10-14 Pedro Buarque De Macedo Method and apparatus for eliminating volatiles or airborne entrainments when vitrifying radioactive and/or hazardous waste
DE19751854A1 (de) * 1997-11-22 1999-05-27 Abb Research Ltd Verfahren zur Aufbereitung von Flugaschen aus der thermischen Abfallbehandlung
CA2389660C (fr) 1999-11-02 2007-10-02 Consolidated Engineering Company, Inc. Procede et appareil permettant la combustion du charbon residuel contenu dans des particules de cendres volantes
US7047894B2 (en) * 1999-11-02 2006-05-23 Consolidated Engineering Company, Inc. Method and apparatus for combustion of residual carbon in fly ash
US6604474B2 (en) * 2001-05-11 2003-08-12 General Electric Company Minimization of NOx emissions and carbon loss in solid fuel combustion
US7374735B2 (en) * 2003-06-05 2008-05-20 General Electric Company Method for nitrogen oxide reduction in flue gas
US7252134B2 (en) * 2004-06-28 2007-08-07 Consolidated Engineering Company, Inc. Method and apparatus for removal of flashing and blockages from a casting
WO2007147091A2 (fr) * 2006-06-15 2007-12-21 Consolidated Engineering Company, Inc. Procédés et système pour fabriquer des piÈces coulÉes en utilisant un système flexible de fabrication automatisÉe
CN101722171B (zh) * 2009-11-24 2012-07-04 武汉光谷环保科技股份有限公司 一种提高铬渣掺比的锅炉飞灰重熔铬渣解毒系统及其方法
BE1025689B1 (nl) * 2017-11-08 2019-06-11 Europem Technologies Nv Systeem en werkwijze voor warmterecuperatie en reiniging van een uitlaatgas van een verbrandingsproces
CN111288451A (zh) * 2020-02-11 2020-06-16 王丽枝 一种生活垃圾热解气化处理成套设备

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AT394102B (de) * 1989-01-26 1992-02-10 Sgp Va Energie Umwelt Verfahren zum kombinierten abbau von organischen verbindungen und entfernung von hg, pb und cr aus staubfoermigen rueckstaenden thermischer entsorgungsprozesse
EP0489867B2 (fr) † 1989-09-21 2005-08-17 Phoenix Environmental, Ltd. Procede et appareil pour rendre les dechets solides non nuisibles pour l'environnement par l'utilisation de la chaleur
DE4026245A1 (de) * 1990-08-18 1992-02-20 Hpm Technocommerz Technologie Verfahren zur thermischen behandlung von abfaellen und reststoffen
US5976488A (en) 1992-07-02 1999-11-02 Phoenix Environmental, Ltd. Process of making a compound having a spinel structure
EP0647816A1 (fr) * 1993-10-09 1995-04-12 Giovanni Albertazzi Installation d'élimination des résidus toxiques
EP0651204A1 (fr) * 1993-11-03 1995-05-03 Hans Dr. Reimer Combustion à haute température et à plusieurs étages de matières résiduaires avec constituants inertes et dispositif pour la mise en oeuvre de ce procédé
BE1007801A3 (nl) * 1993-11-26 1995-10-24 Seghers Eng Nv Werkwijze voor de verbranding van afval en slib en installatie waarin deze werkwijze wordt toegepast.
EP1108955A1 (fr) * 1998-08-27 2001-06-20 Kinsei Sangyo Co., Ltd. Procede d'elimination de dechets par incineration
EP1108955A4 (fr) * 1998-08-27 2002-05-08 Kinsei Sangyo Co Ltd Procede d'elimination de dechets par incineration
US6746497B1 (en) 1998-08-27 2004-06-08 Kinsei Sangyo Co., Ltd. Waste incineration disposal method
CN111360041A (zh) * 2020-04-13 2020-07-03 台州椒江行陈环保科技有限公司 一种铝电解工业中碳渣回收利用装置
CN111360041B (zh) * 2020-04-13 2020-09-29 台州椒江行陈环保科技有限公司 一种铝电解工业中碳渣回收利用装置

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US4915039A (en) 1990-04-10
JPS6449578A (en) 1989-02-27
DE3724563C2 (fr) 1990-06-28
DE3724563A1 (de) 1989-02-02
EP0300396A3 (fr) 1990-01-31

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