EP3026337B1 - Procede de preparation de combustible de remplacement - Google Patents

Procede de preparation de combustible de remplacement Download PDF

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Publication number
EP3026337B1
EP3026337B1 EP15450031.8A EP15450031A EP3026337B1 EP 3026337 B1 EP3026337 B1 EP 3026337B1 EP 15450031 A EP15450031 A EP 15450031A EP 3026337 B1 EP3026337 B1 EP 3026337B1
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EP
European Patent Office
Prior art keywords
substitute fuel
drying
crushing
gas
substitute
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.)
Active
Application number
EP15450031.8A
Other languages
German (de)
English (en)
Other versions
EP3026337A1 (fr
Inventor
Johannes Uttinger
Wolfgang Freimann
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.)
A Tec Holding GmbH
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A Tec Holding GmbH
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Publication date
Application filed by A Tec Holding GmbH filed Critical A Tec Holding GmbH
Publication of EP3026337A1 publication Critical patent/EP3026337A1/fr
Application granted granted Critical
Publication of EP3026337B1 publication Critical patent/EP3026337B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B1/00—Combustion apparatus using only lump fuel
    • F23B1/30—Combustion apparatus using only lump fuel characterised by the form of combustion chamber
    • F23B1/32—Combustion apparatus using only lump fuel characterised by the form of combustion chamber rotating
    • 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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • 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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/12—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of plastics, e.g. rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/10—Drying by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/80—Shredding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/20—Rotary drum furnace

Definitions

  • the invention relates to a method for processing substitute fuel with the features of the introductory part of claim 1.
  • the average energy input of the furnace (the burning operation) in a cement or lime works for producing cement or quicklime and similar stone earth products, which are calcined in a rotary kiln plant is usually very high at 700 to 1,000 kcal / kg ,
  • Solid substitute fuel is usually an untreated, combustible residue that is produced in production plants.
  • Substitute fuel also called Fluff or RDF
  • a largely two-dimensional (area) fraction which consists mainly of a mixture of plastics, paper, cardboard, textiles, wood and carpet residues.
  • Finely ground coal dust reacts strongly with oxygen at the flame surface.
  • substitute fuel can not ignite due to lack of oxygen. Only when most of the volatiles of coal have burned off and enough oxygen is available can substitute fuel ignite and burn off the substitute fuel.
  • the product such as quicklime and cement clinker, may contain unburned fuel particles, thereby disrupting the manufacturing process.
  • EP 0 887 589 A1 describes an apparatus and a method for burning fuels, in particular in a rotary kiln for the burning of cement clinker.
  • This solid fuel in the form of coal or coke dust and substitute fuel in the form of synthetic resin, household or wood waste is used.
  • JP 2003-130549 A For example, a rotary kiln for burning cement clinker is known in which, in addition to coal dust, combustible waste with dimensions between 15 to 20 mm is burned as a substitute fuel.
  • the dried sludge can be crushed.
  • WO 2011/012114 A2 is a grinding drying of plastic-containing waste, which are to be regarded as a substitute fuel described.
  • US 2010/0006680 A1 describes a method of processing a substitute fuel in which the substitute fuel is shredded and dried during crushing, wherein the drying during crushing is performed by hot gas introduced into the shredder as the drying gas, and wherein the substitute fuel is crushed during shredding of the rotary crusher is moved circular motion. Although not expressly described in US 2010/0006680 A1 the drying gas is passed in cocurrent to the movement of the substitute fuel through the crushing device.
  • the invention has for its object to propose a method for processing of substitute fuel, which allows a substitution of fossil fuels by substitute fuel.
  • substitute fuel can be processed (refined) so that the problems previously encountered in the use of substitute fuels in rotary kilns, for example when burning clinker (see above), are avoided or at least reduced.
  • substitute fuel is optimized with regard to its possible uses, in particular with regard to the use of substitute fuel in the cement industry. This is achieved with the method according to the invention by enlarging the surface, drying and homogenizing the substitute fuel.
  • the refuse-derived fuel to be processed is fed to a rotary crusher.
  • the substitute fuel is accelerated by (fast) rotating comminution tools and the substitute fuel, unlike granulators, is not cut, but torn.
  • substitute fuel is set in a circular motion and swirled.
  • the substitute fuel is dried by supplying hot gas as a drying gas, so that its calorific value is raised.
  • Heated air, or preferably a process off-gas, such as exhaust from a clinker cooler or from a heat exchanger, may be used as the hot gas.
  • substitute fuel according to the invention is of particular interest for its use in cement works, since in most cases sufficient hot gas is available from the manufacture of cement clinker.
  • heat exchanger exhaust gas is used for drying as the hot gas, since this is an inert gas, so that an explosion in the interior of the comminution device is prevented.
  • exhaust gas from a heat exchanger tower or a clinker cooler is used as a hot gas (drying gas), which is supplied to the system via a line 15 with blower 16.
  • the cycle of the drying gas can be opened and closed by means of a flap 1 to the entry of To regulate drying gas.
  • a cyclone 2 is provided, in which the drying gas is dedusted.
  • drying gas is cleaned of abrasive dust to ensure that the shredding tools and screens of the plant are not attacked and their service lives are increased.
  • Purified drying gas exits the cyclone 2 in a blower 3, through which it is volume controlled, depending on the moisture content and the amount of the substitute fuel, promoted.
  • the fan 3 is a frequency-controlled fan.
  • two chain mills 4 are provided in the system next to each other as a fast-running crushing device, which is fed via lines 5 and 6 from the fan 3 drying gas. It is provided that the control of the supply of drying gas by means of control valves, which can be set independently (individually) takes place.
  • the mills 4 are to be treated with substitute fuel via a charging device 14, comprising conveyor belts, fans and screw conveyors.
  • Drying gas is mixed with the substitute fuel during the comminution process of the substitute fuel in the mill room of the mills 4 and in the discharge screws.
  • Drying gas leaving the mills 4 is dedusted in a filter as dedusting device 7 in order to remove fines of the substitute fuel.
  • Part of the drying gas can be introduced via a line 8 with control elements 9 back into the circulation of the drying gas.
  • a frequency-controlled fan 17 is provided which regulates constant pressure in the mills 4 and which is controlled by a pressure measuring device 10 in the lines 5 and 6.
  • Purified drying gas is either recycled via the line 8 back into the circulation of the drying gas or recycled via a flap 11 in the existing exhaust system.
  • a control circuit ensures that the temperature of the drying gas in front of the mills 4 is kept constant.
  • a temperature sensor is provided in the line, which starts from the fan 3 and shares in the leading to the mills 4 lines 5 and 6, which controls the control element 9.
  • Purified hot drying gas air or process waste gas
  • a line 8 is partly returned via the line 8 back into the circulation of the drying gas or discharged via a line 18 into a condenser 19, in which the water content is condensed.
  • the separated, contaminated water is collected in a container 20.
  • the dehumidified drying gas is supplied via a line 21 clinker cooling air blowers 22 and the process via a clinker cooler 23 a rotary kiln 24, so that a complete burning of the gas-air mixture can be done in the process and no odor pollution is more.
  • Another possibility is to return the drying gas via the flap 11 into the raw mill filter and the existing exhaust system.
  • Mills 4 used in carrying out the method according to the invention are chain mills which are equipped with rapidly rotating tools.
  • the drying of substitute fuel during comminution in the mills 4 and during its passage through the mills 4 takes place in cocurrent with supplied drying gas.
  • the supply of drying gas takes place in combination with the introduction of substitute fuel into the mills 4.
  • the substitute fuel in the discharge shafts of the mills 4 is further dried after the comminution has been carried out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (7)

  1. Procédé pour la préparation de combustible de substitution, dans lequel le combustible de substitution est fragmenté par déchirement et séché pendant la fragmentation dans un dispositif de fragmentation rotatif, dans lequel le séchage pendant la fragmentation est réalisé par un gaz chaud introduit dans le dispositif de fragmentation pour servir de gaz de séchage, dans lequel un mouvement circulaire est imprimé au combustible de substitution pendant la fragmentation et le gaz de séchage est acheminé dans le même sens que le déplacement du combustible de substitution à travers le dispositif de fragmentation, caractérisé en ce que la fragmentation est effectuée dans un broyeur à chaînes (4) muni de chaînes tournantes qui forment les outils en rotation rapide produisant la fragmentation.
  2. Procédé selon la revendication 1, caractérisé en ce que le combustible de substitution est acheminé à travers le dispositif de fragmentation pendant la fragmentation par les outils rotatifs du dispositif de fragmentation.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que du gaz de séchage servant au séchage du combustible de substitution est acheminé dans le dispositif de fragmentation en même temps que le combustible de substitution est introduit dans le dispositif de fragmentation.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le combustible de substitution est encore séché après la fragmentation lors de sa sortie du dispositif de fragmentation.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que du plastique, du papier, du carton, des textiles, du bois et des restes de tapis ou des mélanges de ceux-ci sont utilisés comme combustible de substitution.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que du gaz d'échappement de process, prélevé dans le gaz d'échappement du refroidisseur de clinker d'une installation pour la fabrication de clinker de ciment, est utilisé pour le séchage.
  7. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que du gaz d'échappement de process, prélevé dans le gaz d'échappement d'un échangeur de chaleur d'une installation pour la fabrication de clinker de ciment, est utilisé pour le séchage.
EP15450031.8A 2014-11-27 2015-09-03 Procede de preparation de combustible de remplacement Active EP3026337B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA858/2014A AT515772B1 (de) 2014-11-27 2014-11-27 Verfahren zum Aufbereiten von Ersatzbrennstoffen

Publications (2)

Publication Number Publication Date
EP3026337A1 EP3026337A1 (fr) 2016-06-01
EP3026337B1 true EP3026337B1 (fr) 2018-02-21

Family

ID=54105750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15450031.8A Active EP3026337B1 (fr) 2014-11-27 2015-09-03 Procede de preparation de combustible de remplacement

Country Status (2)

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EP (1) EP3026337B1 (fr)
AT (1) AT515772B1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3542004A1 (de) * 1985-11-28 1987-06-04 Kloeckner Humboldt Deutz Ag Trocknung und verbrennung von schlaemmen beim brennprozess mineralischer stoffe
CN1316197C (zh) 1996-12-27 2007-05-16 住友大阪水泥股份有限公司 燃料燃烧设备和方法
JP2003130549A (ja) 2001-10-29 2003-05-08 Mitsubishi Materials Corp ロータリーキルン
EP1747814A1 (fr) * 2005-07-25 2007-01-31 Claudius Peters Technologies GmbH Broyeur et procédé pour la dessiccation de matière broyée
WO2010009174A1 (fr) * 2008-07-14 2010-01-21 36 Degrees South, Inc. Procédé et appareil de séchage et de mise en poudre de matériau
DE102009034880A1 (de) * 2009-07-27 2011-02-24 Altenburger Maschinen Jäckering GmbH Verwendung eines Kunststoff-haltigen Einsatzstoffes für Zementöfen
DE102010006916A1 (de) * 2010-02-04 2011-08-04 Schäfer Elektrotechnik und Sondermaschinen GmbH, 67308 Vorrichtung und Verfahren zur Erzeugung eines feinkörnigen Brennstoffs durch Trocknung und Prallzerkleinerung
DE202013001967U1 (de) * 2013-02-26 2013-03-20 Te Chih Liu Sortier- und Aufbereitungsvorrichtung für Müll

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
AT515772B1 (de) 2015-12-15
AT515772A4 (de) 2015-12-15
EP3026337A1 (fr) 2016-06-01

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