WO2009122248A1 - Method for utilizing alternative fuels - Google Patents

Method for utilizing alternative fuels Download PDF

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Publication number
WO2009122248A1
WO2009122248A1 PCT/IB2009/000562 IB2009000562W WO2009122248A1 WO 2009122248 A1 WO2009122248 A1 WO 2009122248A1 IB 2009000562 W IB2009000562 W IB 2009000562W WO 2009122248 A1 WO2009122248 A1 WO 2009122248A1
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WO
WIPO (PCT)
Prior art keywords
plastic
alternative fuels
waste
cement kiln
clinker
Prior art date
Application number
PCT/IB2009/000562
Other languages
German (de)
French (fr)
Inventor
Robert Houde
Original Assignee
Holcim Technology Ltd.
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 Holcim Technology Ltd. filed Critical Holcim Technology Ltd.
Priority to CA2720427A priority Critical patent/CA2720427C/en
Publication of WO2009122248A1 publication Critical patent/WO2009122248A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/34—Other details of the shaped fuels, e.g. briquettes
    • C10L5/36—Shape
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/48—Solid fuels essentially based on materials of non-mineral origin on industrial residues and waste materials
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • 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
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the invention relates to a method for recycling of alternative fuels such as plastic waste od. Like.
  • alternative fuels such as plastic waste od.
  • a clinker or cement kiln in which the existing of a meltable plastic or this comprehensive alternative fuels are mixed at temperatures above the melting point of the meltable plastic and the resulting mixture is shaped into shaped articles of predetermined size and allowed to solidify for charging in a clinker or cement kiln.
  • Plastic waste is at least partially suitable for re-use, although plastic waste must always be sorted.
  • alternative fuels in clinker or cement kilns tires are often used, the availability of such waste tires has declined and is regionally dependent.
  • the amounts of non-sorted and not readily recyclable plastic waste have become much larger.
  • the use of such plastic waste, which may be in the form of films, plastic bottles or plastic tiles or plastic moldings, as an alternative fuel again requires a high degree of mechanical comminution and leads to materials whose charging can not be satisfactorily solved with conventional charging equipment. In particular, light or thin plastic waste can be easily detected by the wind and not be used in the desired dosage.
  • the invention now aims to provide a method of the type mentioned, with which it is possible to make any plastic waste and possibly other alternative fuels for use in rotary kilns or clinker or cement kilns particularly suitable.
  • the method according to the invention consists essentially in that the shaped bodies in the form of slices, in particular in the dimensions of used tires, are formed and allowed to solidify.
  • a binder component is created with which a number of other alternative fuels can be correspondingly incorporated into a shaped body and thus easily charged.
  • the mixture obtained is shaped into shaped bodies which are particularly suitable for charging into a clinker or cement kiln, it being possible here in accordance with the invention for known or existing charging devices to be used according to the invention if these shaped bodies take the form of slices , and in particular the dimensions of used tires.
  • the synthetic alternative fuel moldings may be incorporated with substantially the same conveying and charging devices as used tires, with the range of alternative fuels or plastics suitable for such use being relatively widely dispersed.
  • the alternative fuels from the group of plastics which melt at the temperature of the mixing and are additionally mixed with plastics which have a higher melting point, for example rubber, in particular Tire waste, biomass and / or dried sludges or wastes contaminated with combustible substances.
  • plastics which have a higher melting point for example rubber, in particular Tire waste, biomass and / or dried sludges or wastes contaminated with combustible substances.
  • a melt can be poured into a mold.
  • a clinker or cement kiln is assumed, which of course also provides corresponding waste heat available.
  • the procedure here is that a thermokinetic mixer is used as the mixer and that the mixture with the waste heat of the clinker or cement kiln is converted into a flowable, at least partially molten consistency and allowed to solidify in a mold.
  • thermokinetic mixer are able to heat by their own motion plastics to the extent that they begin to melt. Since, in the present case, however, a series of components is used, which are characterized by much higher melting points, the additional heating due to the waste heat of the cement kiln can be used particularly efficiently in order to achieve a flowable mixture, which subsequently results at least partially molten can be placed in a mold and in the preferred form of disks, in particular with the dimensions of scrap tires, is allowed to solidify.
  • the exact size and the exact shape as well as the weight of the shaped bodies with predetermined sizes are determined by the respectively existing conveying devices with which such fuels are charged into the rotary kiln. As a rule, these will be conveying devices and charging devices, as were designed for scrap tires, resulting in the preferred shape and size of the shaped bodies.
  • the mixing process also makes it possible to predetermine the calorific value of the formed moldings accordingly, so that the advantages, such as are achieved in the charging, for example, of scrap tires of uniform consistency and size, are also maintained with these synthetic alternative fuel elements.
  • the moldings formed in this way need no packaging of any kind for transport and use, and a controlled adjustment of the calorific value as well as a corresponding gradual release of energy can be set by appropriate mixing.
  • a controlled adjustment of the calorific value as well as a corresponding gradual release of energy can be set by appropriate mixing.
  • the risk of disruptions in operation and in particular of disturbances in the area of mechanical, rotating parts is excluded.
  • the inventive production of the shaped body leads to water-resistant and therefore easily stored products, which do not accumulate or absorb moisture even when stored outdoors.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Processing Of Solid Wastes (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

In a method for utilizing alternative fuels such as plastic waste or the like in a brick or cement furnace, the alternative fuels are mixed with a meltable plastic at temperatures above the melting point of the meltable plastic. The mixture obtained is shaped into molded objects with a predetermined size and allowed to solidify for charging in a brick or cement furnace, and the molded objects are formed in the shape of disks, in particular with dimensions of scrap tires, and allowed to solidify.

Description

Verfahren zum Verwerten alternativer BrennstoffeProcess for the utilization of alternative fuels
Die Erfindung bezieht sich auf ein Verfahren zum Verwerten al- ternativer Brennstoffe wie Kunststoffabfallen od. dgl. in einem Klinker- oder Zementofen, bei welchem die aus einem aufschmelzbaren Kunststoff bestehenden oder diesen umfassenden alternativen Brennstoffe bei Temperaturen über dem Schmelzpunkt des aufschmelzbaren Kunststoffs vermischt werden und das erhaltene Gemisch zu Formkörpern mit vorgegebener Größe geformt und zum Chargieren in einen Klinker- oder Zementofen erstarren gelassen wird.The invention relates to a method for recycling of alternative fuels such as plastic waste od. Like. In a clinker or cement kiln, in which the existing of a meltable plastic or this comprehensive alternative fuels are mixed at temperatures above the melting point of the meltable plastic and the resulting mixture is shaped into shaped articles of predetermined size and allowed to solidify for charging in a clinker or cement kiln.
Kunststoffabfälle eignen sich zumindest teilweise zur Wieder- Verwertung, wobei allerdings zumeist Kunststoffabfalle sortenrein zur Verfügung stehen müssen. Als alternative Brennstoffe in Klinker- bzw. Zementöfen werden häufig Altreifen eingesetzt, wobei die Verfügbarkeit derartiger Altreifen zurückgegangen ist und regional abhängig ist. Andererseits sind die Mengen an nicht sortenreinen und nicht ohne weiteres wiederverwertbaren Kunststoffabfallen deutlich größer geworden. Der Einsatz derartiger Kunststoffabfälle, welche in Form von Folien, Kunststoff- flaschen oder Kunststofffliesen bzw. Kunststoffformteilen vorliegen können, als alternativer Brennstoff erfordert jedoch wiederum ein hohes Ausmaß an mechanischer Zerkleinerung und führt zu Materialien, deren Chargierung mit konventionellen Chargiereinrichtungen nicht zufriedenstellend gelöst werden kann. Insbesondere leichte oder dünne Kunststoffabfälle können leicht vom Wind erfasst werden und nicht in der gewünschten Dosierung eingesetzt werden.Plastic waste is at least partially suitable for re-use, although plastic waste must always be sorted. As alternative fuels in clinker or cement kilns tires are often used, the availability of such waste tires has declined and is regionally dependent. On the other hand, the amounts of non-sorted and not readily recyclable plastic waste have become much larger. The use of such plastic waste, which may be in the form of films, plastic bottles or plastic tiles or plastic moldings, as an alternative fuel, however, again requires a high degree of mechanical comminution and leads to materials whose charging can not be satisfactorily solved with conventional charging equipment. In particular, light or thin plastic waste can be easily detected by the wind and not be used in the desired dosage.
Für die Verwertbarkeit als alternativer Brennstoff für den unmittelbaren Einsatz in einem Klinker- oder Zementofen ist es aber wesentliche Voraussetzung, die Brennstoffe in einer Weise zu chargieren, welche in der Zeiteinheit einen bestimmten Brennwert an definierten Stellen des Drehrohrofens bzw. Zementofens zur Verfügung stellt, wobei große Schwankungen im Brenn- wert und in der zugeführten Menge zu unregelmäßigem Abbrand und zu Störungen des Klinkerprozesses führen.For the usability as an alternative fuel for direct use in a clinker or cement kiln, however, it is essential to charge the fuels in a manner which provides a certain calorific value at defined points of the rotary kiln or cement kiln in the unit time, wherein large fluctuations in the combustion value and in the amount supplied lead to irregular burnup and faults in the clinker process.
Die Erfindung zielt nun darauf ab, ein Verfahren der eingangs genannten Art zu schaffen, mit welchem es gelingt, beliebige Kunststoffabfalle und ggf. andere alternative Brennstoffe für den Einsatz in Drehrohröfen bzw. Klinker- oder Zementöfen besonders geeignet zu machen.The invention now aims to provide a method of the type mentioned, with which it is possible to make any plastic waste and possibly other alternative fuels for use in rotary kilns or clinker or cement kilns particularly suitable.
Zur Lösung dieser Aufgabe besteht das erfindungsgemäße Verfahren im Wesentlichen darin, dass die Formkörper in Form von Scheiben, insbesondere in den Dimensionen von Altreifen, ausgeformt und erstarren gelassen werden. Dadurch, dass ein aufschmelzbarer Kunststoff bei der Temperatur des Mischens in ge- schmolzener Form eingesetzt wird, wird eine Bindemittelkomponente geschaffen, mit welcher eine Reihe von anderen alternativen Brennstoffen entsprechend in einen Formkörper eingebunden werden kann und auf diese Weise einfach chargiert werden kann. Wesentlich ist hierbei, dass das erhaltene Gemisch zu Formkör- pern geformt wird, welche sich für das Chargieren in einen Klinker- oder Zementofen besonders eignet, wobei hier erfindungsgemäß auf bekannte bzw. bestehende Chargiereinrichtungen zurückgegriffen werden kann, wenn diese Formkörper erfindungsgemäß die Form von Scheiben, und insbesondere die Dimensionen von Altreifen, aufweisen. In solchen Fällen können die synthetischen alternativen Brennstoff-Formkörper mit im wesentlichen gleichen Förder- und Chargiervorrichtungen wie Altreifen eingebracht werden, wobei das Spektrum von für einen derartigen Einsatz geeigneten alternativen Brennstoffen bzw. Kunststoffen relativ breit gestreut ist.To solve this problem, the method according to the invention consists essentially in that the shaped bodies in the form of slices, in particular in the dimensions of used tires, are formed and allowed to solidify. By using a meltable plastic at the temperature of mixing in melted form, a binder component is created with which a number of other alternative fuels can be correspondingly incorporated into a shaped body and thus easily charged. It is essential here that the mixture obtained is shaped into shaped bodies which are particularly suitable for charging into a clinker or cement kiln, it being possible here in accordance with the invention for known or existing charging devices to be used according to the invention if these shaped bodies take the form of slices , and in particular the dimensions of used tires. In such cases, the synthetic alternative fuel moldings may be incorporated with substantially the same conveying and charging devices as used tires, with the range of alternative fuels or plastics suitable for such use being relatively widely dispersed.
Mit Vorteil kann im Rahmen des erfindungsgemäßen Verfahrens so vorgegangen werden, dass die alternativen Brennstoffe aus der Gruppe von Kunststoffen, die bei der Temperatur der Vermischung schmelzen, gewählt werden und zusätzlich mit Kunststoffen vermischt werden, die einen höheren Schmelzpunkt aufweisen, wie beispielsweise Gummi, insbesondere Reifenabfälle, Biomasse und/oder getrocknete Schlämme bzw. mit brennbaren Substanzen kontaminierte Abfälle. Prinzipiell kann bei Verwendung einheitlich schmelzender Kunststoffe unmittelbar eine Schmelze in eine Form vergossen werden. In aller Regel werden aber Gemische ein- gesetzt, bei welchen Teile einen höheren Schmelzpunkt als eine schmelzbare Kunststoffkomponente aufweisen, sodass in diesem Fall die schmelzbare Kunststoffkomponente die Funktion eines Bindemittels übernimmt und die erst bei höheren Temperaturen schmelzenden Kunststoffe als Festkörper in der Form zusammen- hält. Es können somit Reifenabfälle, schwer schmelzbare Kunststoffe, Biomasse, getrocknete Schlämme od. dgl. mit dem schmelzbaren Kunststoff zu einem Formkörper verformt werden, wobei wiederum die gewünschte Form für eine besonders günstige Chargierung in den Klinker- oder Zementofen gewählt werden kann.Advantageously, in the context of the method according to the invention, it is possible to select the alternative fuels from the group of plastics which melt at the temperature of the mixing and are additionally mixed with plastics which have a higher melting point, for example rubber, in particular Tire waste, biomass and / or dried sludges or wastes contaminated with combustible substances. In principle, when using uniformly melting plastics directly a melt can be poured into a mold. As a rule, however, mixtures are used in which parts have a higher melting point than a fusible plastic component, so that in this case the fusible plastic component takes over the function of a binder and holds the melting only at higher temperatures plastics as solid in the form , It can thus tire odors, hard-meltable plastics, biomass, dried sludge od. Like. Be deformed with the meltable plastic to form a molding, in turn, the desired shape for a particularly favorable charging in the clinker or cement kiln can be selected.
Bei der Verwendung des erfindungsgemäßen Verfahrens wird ein Klinker- oder Zementofen vorausgesetzt, welcher naturgemäß auch entsprechende Abwärme zur Verfügung stellt. Mit Vorteil kann daher im Rahmen der Erfindung so vorgegangen werden, dass zum Schmelzen die Abwärme eines Zementofens eingesetzt wird. In besonders vorteilhafter Weise wird hierbei so vorgegangen, dass als Mischer ein thermokinetischer Mischer eingesetzt wird und dass das Gemisch mit der Abwärme des Klinker- oder Zementofens in eine fließfähige, wenigstens teilweise schmelzflüssige Konsistenz überführt wird und in einer Form erstarren gelassen wird.When using the method according to the invention, a clinker or cement kiln is assumed, which of course also provides corresponding waste heat available. Advantageously, it is therefore possible in the context of the invention to proceed in such a way that the waste heat of a cement kiln is used for melting. In a particularly advantageous manner, the procedure here is that a thermokinetic mixer is used as the mixer and that the mixture with the waste heat of the clinker or cement kiln is converted into a flowable, at least partially molten consistency and allowed to solidify in a mold.
Derartige thermokinetische Mischer sind zwar in der Lage, durch ihre Eigenbewegung Kunststoffe soweit zu erwärmen, dass sie auch zu schmelzen beginnen. Da im vorliegenden Fall aber be- wusst eine Reihe von Komponenten eingesetzt wird, welche sich durch wesentlich höhere Schmelzpunkte auszeichnen, kann die zusätzliche Erwärmung durch die Abwärme des Zementofens beson- ders effizient genützt werden, um ein fließfähiges Gemisch zu erzielen, welches in der Folge wenigstens teilweise schmelzflüssig in eine Form verbracht werden kann und in der bevorzug- ten Form von Scheiben, insbesondere mit den Dimensionen von Altreifen, erstarren gelassen wird.Although such thermokinetic mixer are able to heat by their own motion plastics to the extent that they begin to melt. Since, in the present case, however, a series of components is used, which are characterized by much higher melting points, the additional heating due to the waste heat of the cement kiln can be used particularly efficiently in order to achieve a flowable mixture, which subsequently results at least partially molten can be placed in a mold and in the preferred form of disks, in particular with the dimensions of scrap tires, is allowed to solidify.
Im Einzelnen bestimmen sich die exakte Größe und die exakte Form ebenso wie das Gewicht der Formkörper mit vorgegebenen Größen nach den jeweils vorhandenen Fördereinrichtungen, mit welchen derartige Brennstoffe in den Drehrohrofen chargiert werden. In aller Regel wird es sich hier um Fördereinrichtungen und Chargiereinrichtungen handeln, wie sie für Altreifen konzi- piert wurden, wodurch sich die bevorzugte Form und Größe der Formkörper ergibt. Der Mischprozess erlaubt es aber auch, den Brennwert der jeweils gebildeten Formkörper entsprechend vor- auszubestimmen, sodass die Vorteile, wie sie bei der Chargierung beispielsweise von Altreifen einheitlicher Konsistenz und Größe erzielt werden, auch mit diesen synthetischen alternativen Brennstoffelementen gewahrt werden. Prinzipiell führt die Herstellung derartiger Formkörper mit vorgegebener Größe zu Produkten mit gegenüber den Ausgangsprodukten höherer Dichte, sodass der Transport dieser Produkte erleichtert wird und die Möglichkeit geschaffen wird, diese Formkörper an beliebigen Stellen, wo die entsprechenden Abfälle und die entsprechende Wärme zur Verfügung stehen, herzustellen. Neben dem bevorzugten Aufstellungsort in der unmittelbaren Nähe einer Zementfabrik können naturgemäß auch Aufstellungsorte vorteilhaft sein, wel- che in der Nähe von Einrichtungen gelegen sind, in welchen Kunststoffabfalle erzeugt und/oder sortiert werden. Dies können große Industrien oder Kunststoffwiederverwertungsanlagen sein, bei welchen eine Reihe von Kunststoffen, welche sich für die Wiederverwertung nicht ohne weiteres eignen, anfallen. Die im Wesentlichen monolithische Struktur der Formkörper erleichtert den Transport, da insbesondere kleinteilige und beim Transport abfallende Verunreinigungen nicht gebildet werden, sondern in die Kunststoffformkörper eingebunden werden. Durch Wahl der entsprechenden Materialien kann auch der Abrieb gering gehalten werden. Die auf die Weise gebildeten Formkörper benötigen für den Transport und für den Einsatz keine wie immer geartete Verpackung und es kann durch entsprechendes Mischen eine kontrollierte Einstellung des Brennwertes ebenso wie eine entsprechend graduelle Energieabgabe eingestellt werden. Gegenüber dem konventionellen Einsatz loser Plastikmaterialien wird die Gefahr von Störungen im Betrieb und insbesondere von Störungen im Bereich mechanischer, rotierender Teile ausgeschlossen. Zu allem Überfluss führt die erfindungsgemäße Herstellung der Formkörper zu wasserfesten und daher leicht zu lagernden Produkten, welche auch bei Lagerung im Freien keine Feuchtigkeit anlagern oder aufnehmen. In detail, the exact size and the exact shape as well as the weight of the shaped bodies with predetermined sizes are determined by the respectively existing conveying devices with which such fuels are charged into the rotary kiln. As a rule, these will be conveying devices and charging devices, as were designed for scrap tires, resulting in the preferred shape and size of the shaped bodies. However, the mixing process also makes it possible to predetermine the calorific value of the formed moldings accordingly, so that the advantages, such as are achieved in the charging, for example, of scrap tires of uniform consistency and size, are also maintained with these synthetic alternative fuel elements. In principle, the production of such moldings of a given size leads to products with respect to the starting products of higher density, so that the transport of these products is facilitated and the possibility is created to produce these moldings at any point where the corresponding waste and the corresponding heat are available , In addition to the preferred installation site in the immediate vicinity of a cement factory, it is of course also possible to benefit from sites which are located in the vicinity of facilities in which plastic waste is produced and / or sorted. These may be large industries or plastic recycling plants where a number of plastics which are not readily available for recycling are produced. The substantially monolithic structure of the moldings facilitates transport, since in particular small-sized impurities falling off during transport are not formed, but are incorporated into the plastic moldings. By selecting the appropriate materials and the abrasion can be kept low. The moldings formed in this way need no packaging of any kind for transport and use, and a controlled adjustment of the calorific value as well as a corresponding gradual release of energy can be set by appropriate mixing. Compared with the conventional use of loose plastic materials, the risk of disruptions in operation and in particular of disturbances in the area of mechanical, rotating parts is excluded. To make matters worse, the inventive production of the shaped body leads to water-resistant and therefore easily stored products, which do not accumulate or absorb moisture even when stored outdoors.

Claims

Patentansprüche : Claims:
1. Verfahren zum Verwerten alternativer Brennstoffe wie Kunststoffabfallen od. dgl. in einem Klinker- oder Zementofen, bei welchem die aus einem aufschmelzbaren Kunststoff bestehenden oder diesen umfassenden alternativen Brennstoffe bei Temperaturen über dem Schmelzpunkt des aufschmelzbaren Kunststoffs ver- mischt werden und das erhaltene Gemisch zu Formkörpern mit vorgegebener Größe geformt und zum Chargieren in einen Klinkeroder Zementofen erstarren gelassen wird, dadurch gekennzeichnet, dass die Formkörper in Form von Scheiben, insbesondere in den Dimensionen von Altreifen, ausgeformt und erstarren gelas- sen werden.1. A method for recycling alternative fuels such as plastic waste od. Like. In a clinker or cement kiln, in which the consisting of a fusible plastic or this comprehensive alternative fuels are mixed at temperatures above the melting point of the meltable plastic and the resulting mixture to Shaped molded bodies of a given size and allowed to solidify for charging in a clinker or cement kiln, characterized in that the shaped bodies in the form of discs, in particular in the dimensions of old tires, molded and solidified.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die alternativen Brennstoffe aus der Gruppe von Kunststoffen, die bei der Temperatur der Vermischung schmelzen, gewählt werden und zusätzlich mit Kunststoffen vermischt werden, die einen höheren Schmelzpunkt aufweisen, wie beispielsweise Gummi, insbesondere Reifenabfälle, Biomasse und/oder getrocknete Schlämme bzw. mit brennbaren Substanzen kontaminierte Abfälle.2. The method according to claim 1, characterized in that the alternative fuels are selected from the group of plastics which melt at the temperature of mixing, and are additionally mixed with plastics which have a higher melting point, such as rubber, in particular tire waste, Biomass and / or dried sludge or waste contaminated with combustible substances.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zum Schmelzen die Abwärme eines Zementofens eingesetzt wird.3. The method according to claim 1 or 2, characterized in that for melting the waste heat of a cement kiln is used.
4. Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass als Mischer ein. thermokinetischer Mischer eingesetzt wird und dass das Gemisch mit der Abwärme des Klinker- oder Zementofens in eine fließfähige, wenigstens teilweise schmelzflüssige Konsistenz überführt wird und in einer Form erstarren gelassen wird. 4. The method according to claim 1, 2 or 3, characterized in that as a mixer. thermokinetic mixer is used and that the mixture with the waste heat of the clinker or cement kiln is converted into a flowable, at least partially molten consistency and allowed to solidify in a mold.
PCT/IB2009/000562 2008-04-03 2009-03-20 Method for utilizing alternative fuels WO2009122248A1 (en)

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JPH0825501A (en) * 1994-07-14 1996-01-30 Enplas Corp Disklike plastic molding
US5895790A (en) * 1995-03-14 1999-04-20 Good; Elmer Thermosetting wide range polymer blends
US20030021991A1 (en) * 1999-11-02 2003-01-30 Tetsuro Sugayoshi Pellets and method for producing the same

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Publication number Priority date Publication date Assignee Title
JPS5727954A (en) * 1980-07-24 1982-02-15 Babcock Hitachi Kk Cement burning process
JPH0825501A (en) * 1994-07-14 1996-01-30 Enplas Corp Disklike plastic molding
US5895790A (en) * 1995-03-14 1999-04-20 Good; Elmer Thermosetting wide range polymer blends
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