WO2009065726A1 - Procédé de régulation d'un dispositif de chauffe à combustible solide - Google Patents

Procédé de régulation d'un dispositif de chauffe à combustible solide Download PDF

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Publication number
WO2009065726A1
WO2009065726A1 PCT/EP2008/064920 EP2008064920W WO2009065726A1 WO 2009065726 A1 WO2009065726 A1 WO 2009065726A1 EP 2008064920 W EP2008064920 W EP 2008064920W WO 2009065726 A1 WO2009065726 A1 WO 2009065726A1
Authority
WO
WIPO (PCT)
Prior art keywords
flue gas
primary
air
water content
amount
Prior art date
Application number
PCT/EP2008/064920
Other languages
German (de)
English (en)
Inventor
Wolfgang Madlsperger
Original Assignee
Siemens Ag Österreich
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 Siemens Ag Österreich filed Critical Siemens Ag Österreich
Priority to ES08852332.9T priority Critical patent/ES2591358T3/es
Priority to EP08852332.9A priority patent/EP2210044B1/fr
Publication of WO2009065726A1 publication Critical patent/WO2009065726A1/fr

Links

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
    • F23B1/16—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support
    • F23B1/28—Combustion apparatus using only lump fuel the combustion apparatus being modified according to the form of grate or other fuel support using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • F23B40/02—Combustion apparatus with driven means for feeding fuel into the combustion chamber the fuel being fed by scattering over the fuel-supporting surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B7/00—Combustion techniques; Other solid-fuel combustion apparatus
    • F23B7/002—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements
    • F23B7/007—Combustion techniques; Other solid-fuel combustion apparatus characterised by gas flow arrangements with fluegas recirculation to 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
    • F23G5/12—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating using gaseous or liquid fuel
    • 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
    • F23G7/105—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses of wood waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/26—Biowaste
    • F23G2209/261—Woodwaste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2900/00—Special features of, or arrangements for incinerators
    • F23G2900/00001—Exhaust gas recirculation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2900/00—Special features of, or arrangements for incinerators
    • F23G2900/55—Controlling; Monitoring or measuring
    • F23G2900/55003—Sensing for exhaust gas properties, e.g. O2 content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/26—Measuring humidity

Definitions

  • the invention relates to a method for controlling a solid fuel firing device, which has at least a primary air supply and a primary flue gas recirculation, as well as a corresponding firing device.
  • these various solid fuels may have a very high and, in addition, a widely varying water content.
  • these various solid fuels can be used simultaneously, which of course also their
  • Previous methods consisted of adjusting the air conditions manually or manually operating a support burner. This leads due to the long reaction times to unstable combustion conditions and therefore poor combustion quality, which are characterized by slag formation, insufficient burnout or fluctuating temperatures in the combustion chamber.
  • An object of the invention is, even with changing fuel composition, a continuously and automatically working
  • the object is achieved by a method according to claim 1, according to which the setpoint values for the amount of primary air and of air from the primary
  • Flue gas recirculation depending on the water content of the flue gas be set. This can be deduced by an automatic measurement of the water content of the flue gas on the conditions in the combustion chamber and these are adjusted by adjusting the amount of primary air and air from the flue gas recirculation accordingly. No manual intervention is necessary, not even the measurement of the water content of the fuel.
  • a support burner can be switched on.
  • a possible rule criterion is that with increasing water content of the flue gas, the amount of primary air increased and the amount of air from the primary flue gas recirculation is reduced. Since the primary air in this case will generally be drier than that from the Phmär flue gas recirculation, this should reduce the water content in the flue gas and thus also in the combustion chamber.
  • the amount of primary air is reduced and the amount of air from the Phmär- flue gas recirculation is increased.
  • a possible embodiment of this is that depending on the water content of the flue gas, a correction factor is set, wherein the determined based on the amount of fuel setpoint for the primary air quantity multiplied by this correction factor and divided by the fuel quantity, the setpoint for the amount of air from the primary flue gas recirculation by the same correction factor.
  • the determined based on the amount of fuel setpoint for the amount of air from the primary flue gas recirculation is multiplied by a further, dependent on the water content of the flue gas correction factor.
  • the support burner is switched off. It is advantageous if the firing device has a grate with litter feed, since these can react fastest to changes in the measured water content of the flue gas.
  • the solid fuel firing device has a measuring device for measuring the water content of the flue gas, which is connected via a control device with a primary air blower and with a blower for primary flue gas recirculation such that the setpoints for the amount of primary air and air from the primary flue gas recirculation in Depending on the water content of the flue gas can be adjusted.
  • Fig. 1 is a schematic representation of a system according to the invention
  • Fig. 2 shows a correction factor for the supply of primary air and air from the primary flue gas recirculation
  • Fig. 3 shows a correction factor for the amount of air from the primary flue gas recirculation.
  • Fig. 1 the solid-firing device is shown schematically.
  • the fuel 9 is conveyed via a throw feeder 4 in the furnace, where it impinges on a grate 8 and is promoted on this through the furnace.
  • the grate 8 moves in the direction of the litter feeder, that is, in Fig. 1 from left to right.
  • the fuel 9 is evenly distributed over the grate 8, so it always falls into an already burning environment.
  • the heat of combustion of the already burning fuel is used.
  • the litter feeding there is - in contrast to other grate firing - no drying zone without combustion. For this reason, the temperatures at the grate 8 in the litter feed are lower and problems such as slag formation and rust overheating can be prevented.
  • Below the grate 8 opens both the supply of primary air, which is introduced by the primary air blower 5 in the furnace.
  • the supply for primary flue gas recirculation air opens under the grate 8, which is also promoted by a fan 6 in the furnace.
  • Primary air is ambient air that is supplied to the combustion chamber. It has an oxygen content of about 21%.
  • Flue gas recirculation air is flue gas, which is usually taken after the last heat exchanger, the so-called economizer. When this flue gas recirculation air is introduced below the grate 8, it is called primary flue gas recirculation.
  • the recirculated flue gas or the oxygen still contained therein is used for the combustion, the combustion process itself can be influenced.
  • the flue gas recirculation air When the flue gas recirculation air is introduced above the grate 8, it is called secondary flue gas recirculation.
  • the recirculated flue gas is merely used to limit the temperature of the flue gas produced during combustion. In order to make sure that the temperatures at the
  • Rust 8 does not become too low, and therefore the combustion ceases or is incomplete, it is necessary to vary the oxygen supply for combustion. This is done by mixing the primary air (21% oxygen content) with recirculation air (about 5% to 10% oxygen content). The mixture of the two air fractions already takes place before entering the ember bed. A higher recirculation air fraction causes due to the increased amount of inert gas, a reduction in the combustion temperature and in addition a reduction in the drying rate of the (freshly distributed) fuel, a smaller recirculation air content causes the opposite. At high water content in the fuel, therefore, the Rezirkulations Kunststoffanteil must be reduced, at the same time the amount of fresh air is increased.
  • the proportion of oxygen in the combustion air increases at a lower inert gas content. If the water content in the fuel is so high that stable combustion is not possible (because so much heat is needed for drying), the support burner 4 is switched to support it. The flame radiation of the support burner 4 causes an additional drying of the fuel, as well as the increased burner temperatures in the gas above the ember bed.
  • the flue gas 10 produced during combustion rises in the firing device and is fed to a heat recovery device.
  • the measuring device 1 for the water content of the flue gas and the lambda probe 2 is arranged in the area of this heat recovery device.
  • the measured values of these two devices are supplied to the regulating device 7, which regulates both the supply of primary air, ie the primary air blower 5, and the supply of primary flue gas recirculation air, ie the corresponding blower 6, as well as the support burner 4 and the throw feeder 3.
  • the support burner 4 is arranged in the combustion chamber and is then switched on when the water content of the flue gas exceeds a threshold which can not be controlled back sufficiently with the air control alone or not sufficiently fast. The larger the threshold is exceeded, the higher the output of the support burner is set. If the
  • Water content of the flue gas drops below the threshold again, then the support burner is switched off again.
  • the power of the furnace is controlled by changing the amount of fuel supplied, so for example by changing the speed of the metering screws, depending on the required heat output.
  • the setpoint values for the amount of primary air and of air from the primary flue gas recirculation are initially determined as a function of the fuel quantity, that is, for example, on the speed of the metering screws.
  • the horizontal axis (x-axis), the water content of the flue gas (H 2 O) are plotted on the vertical axis (y-axis), the correction factors for the setpoint values for the amount of primary air and in air from the primary flue gas recirculation (FIG. 2) or only for the desired value of the amount of primary flue gas recirculation air (FIG. 3).
  • the set value for the air supply determined in advance on the basis of the fuel quantity corresponds to the value 1 on the vertical axis.
  • the amount of air from the primary flue gas recirculation is divided by the correction factor from FIG. 2 and multiplied by the correction factor from FIG. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

L'invention concerne un procédé de régulation d'un dispositif de chauffe à combustible solide qui dispose au moins d'une admission d'air primaire (5) et d'une recirculation primaire de gaz de fumée (6). Selon l'invention, les valeurs de consigne pour la quantité d'air primaire et d'air issu de la recirculation primaire de gaz de fumée sont réglées en fonction de la teneur en eau du gaz de fumée. On garantit ainsi la mise à disposition, même en cas de variation de la composition du combustible, d'une régulation à fonctionnement continu et automatique pour un dispositif de chauffe à combustible solide qui permet une qualité de combustion la plus constante possible sur une durée prolongée.
PCT/EP2008/064920 2007-11-19 2008-11-04 Procédé de régulation d'un dispositif de chauffe à combustible solide WO2009065726A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES08852332.9T ES2591358T3 (es) 2007-11-19 2008-11-04 Procedimiento para la regulación de un sistema de combustión de combustible sólido
EP08852332.9A EP2210044B1 (fr) 2007-11-19 2008-11-04 Procédé de régulation d'un dispositif de chauffe à combustible solide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007055168.3 2007-11-19
DE102007055168A DE102007055168A1 (de) 2007-11-19 2007-11-19 Verfahren zur Regelung einer Festbrennstoff-Befeuerungseinrichtung

Publications (1)

Publication Number Publication Date
WO2009065726A1 true WO2009065726A1 (fr) 2009-05-28

Family

ID=40456902

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/064920 WO2009065726A1 (fr) 2007-11-19 2008-11-04 Procédé de régulation d'un dispositif de chauffe à combustible solide

Country Status (5)

Country Link
EP (1) EP2210044B1 (fr)
DE (1) DE102007055168A1 (fr)
ES (1) ES2591358T3 (fr)
PL (1) PL2210044T3 (fr)
WO (1) WO2009065726A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012000262A1 (de) 2012-01-10 2013-07-11 Jörg Krüger Verfahren und Vorrichtung zur Verbesserung des Ausbrandes von Schlacken auf Verbrennungsrosten

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1398456B1 (it) * 2010-02-23 2013-02-22 Salvatico Apparato di combustione a pellet e/o a biomasse.
FR2961291B1 (fr) * 2010-06-14 2014-06-06 Philippe Rousseau Installation de traitement de fumees
CN102242925B (zh) * 2011-05-03 2013-04-17 李继华 燃煤锅炉烟尘治理设备
WO2013002746A2 (fr) * 2011-06-15 2013-01-03 Emsa Enerji Madencilik Sanayi Ve Ticaret Anonim Sirketi Unité à eau chaude et à vapeur à commande automatique réalisant la combustion de schiste bitumineux et de charbon avec de l'hydrogène et/ou de l'air
AT15458U1 (de) * 2013-02-25 2017-09-15 Ing Russ Egon Verfahren zum Verbrennen von Brennstoff
DE102020124544A1 (de) 2020-09-21 2022-03-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Verfahren und Anlage zum thermischen Verwerten von festem Brennstoff in einem Reaktionsraum

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317731A1 (fr) * 1987-10-24 1989-05-31 Kurt-Henry Dipl.-Ing. Mindermann Procédé de contrôle de la combustion de carburant possédant un pouvoir calorifique fortement variable
DE4033889A1 (de) * 1990-08-09 1992-02-13 Furumoto Herbert Dr Ing Verfahren zum verbrennen von steinkohlen und anderen heizwertreichen festen brennstoffen in rostfeuerungen fuer braunkohlen und andere heizwertarme brennstoffe
EP0718555A1 (fr) * 1994-12-22 1996-06-26 ABBPATENT GmbH Procédé et dispositif pour la combustion des déchets
EP1046861A1 (fr) * 1999-04-19 2000-10-25 ABB Alstom Power (Schweiz) AG Procédé pour le réglage automatique de la combustion d'un incinerateur d'ordures

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10012895A1 (de) 2000-03-16 2001-09-20 Krc Umwelttechnik Gmbh Verbrennungsverfahren für Brennstoffe beliebiger Art mittels einer Rostfeuerung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317731A1 (fr) * 1987-10-24 1989-05-31 Kurt-Henry Dipl.-Ing. Mindermann Procédé de contrôle de la combustion de carburant possédant un pouvoir calorifique fortement variable
DE4033889A1 (de) * 1990-08-09 1992-02-13 Furumoto Herbert Dr Ing Verfahren zum verbrennen von steinkohlen und anderen heizwertreichen festen brennstoffen in rostfeuerungen fuer braunkohlen und andere heizwertarme brennstoffe
EP0718555A1 (fr) * 1994-12-22 1996-06-26 ABBPATENT GmbH Procédé et dispositif pour la combustion des déchets
EP1046861A1 (fr) * 1999-04-19 2000-10-25 ABB Alstom Power (Schweiz) AG Procédé pour le réglage automatique de la combustion d'un incinerateur d'ordures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012000262A1 (de) 2012-01-10 2013-07-11 Jörg Krüger Verfahren und Vorrichtung zur Verbesserung des Ausbrandes von Schlacken auf Verbrennungsrosten
WO2013104407A2 (fr) 2012-01-10 2013-07-18 Krüger, Jörg Procédé et dispositif pour améliorer la combustion de scories sur des grilles de combustion
DE102012000262B4 (de) * 2012-01-10 2015-12-17 Jörg Krüger Verfahren und Vorrichtung zur Verbesserung des Ausbrandes von Schlacken auf Verbrennungsrosten

Also Published As

Publication number Publication date
PL2210044T3 (pl) 2017-08-31
EP2210044A1 (fr) 2010-07-28
DE102007055168A1 (de) 2009-05-20
ES2591358T3 (es) 2016-11-28
EP2210044B1 (fr) 2016-06-15

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