EP3583356B1 - Procédé de combustion de biocombustible - Google Patents

Procédé de combustion de biocombustible Download PDF

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Publication number
EP3583356B1
EP3583356B1 EP18707851.4A EP18707851A EP3583356B1 EP 3583356 B1 EP3583356 B1 EP 3583356B1 EP 18707851 A EP18707851 A EP 18707851A EP 3583356 B1 EP3583356 B1 EP 3583356B1
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EP
European Patent Office
Prior art keywords
biofuel
stage
combustion
air stream
air
Prior art date
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EP18707851.4A
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German (de)
English (en)
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EP3583356A1 (fr
Inventor
Scott Carpenter MILLIGAN
Todd David Hellewell
Robert Kunkel
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General Electric Technology GmbH
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General Electric Technology GmbH
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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
    • F23G5/02—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
    • F23G5/32—Incineration of waste; Incinerator constructions; Details, accessories or control therefor the waste being subjected to a whirling movement, e.g. cyclonic incinerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
    • 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
    • F23G5/38—Multi-hearth arrangements
    • 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
    • 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
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/10—Combustion in two or more stages
    • F23G2202/101—Combustion in two or more stages with controlled oxidant supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/30—Cyclonic combustion furnace
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/10—Catalytic reduction devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00—Pretreatment of solid fuel
    • F23K2201/10—Pulverizing
    • F23K2201/1006—Mills adapted for use with furnaces

Definitions

  • Embodiments of the invention relate generally to energy production, and more specifically, to a method for firing a biofuel.
  • biofuels are increasingly used in the production of energy.
  • many electrical power plants also referred to hereinafter simply as "power plants”
  • burn biofuels to produce steam which in turn powers a steam turbine generator.
  • the biofuel is burned on a stoker grate within a combustion chamber. Burning biofuel on a stoker grate, however, can potentially create a relatively unpredictable and/or uncontrolled combustion reaction for a given amount of biofuel.
  • predictable and “unpredictable”, as used herein with respect to a combustion reaction refer to the likelihood that the combustion reaction will follow a predicted/calculated rate and/or stoichiometry.
  • SNCRs selective non-catalytic reducers
  • SCRs selective catalytic reducers
  • SNCRs and SCRs are resource intensive and expensive to operate.
  • NH3 ammonia
  • Document US 6 269 755 B1 discloses an industrial burner for combustion of biomass. Said industrial burner is designed to achieve high turndown ratios and high heat release ratios.
  • a combustion chamber disclosed in this document comprises three stages with the same amount of air provided to each of them.
  • Document US 4 398 477 A discloses a combustion furnace that avoids discharging large amount of dust into the environment and uses combustion gases as a direct heat source, i.e., not requiring a heat exchanger. This combustion furnace comprises two chambers wherein the second chamber receives more air than the first one.
  • Document US 3 831 535 A discloses a system with a combustion chamber and a blending chamber. The combustion chamber burns a biofuel and the blending chamber burns gases produced from drying veneer.
  • Document US 2006/225424 A1 discloses a cyclonic combustor for a biofuel.
  • the cyclonic combustor includes an ignition zone, a combustion zone and a dilution zone. Air is provided in the ignition zone and in the combustion zone in stoichiometric amounts to lower emission of nitrogen oxides.
  • the dilution zone is provided with air to dilute and cool down combustion gases so that said combustion gases can be used in a gas turbine.
  • a method of firing a biofuel is provided as claimed in claim 1.
  • a system for firing a biofuel includes a combustion chamber having a first stage and a second stage.
  • the combustion chamber is operative to provide for combustion of the biofuel in a suspended state while flowing from the first stage to the second stage.
  • the combustion chamber further has a first injector and a second injector operative to introduce a first air stream and a second air stream into the combustion chamber at the first stage and at the second stage, respectively, to facilitate combustion of the biofuel.
  • a non-transitory computer readable medium storing instructions is provided as claimed in claim 5.
  • the terms “substantially”, “generally” and “about” indicate conditions within reasonably achievable manufacturing and assembly tolerances, relative to ideal desired conditions suitable for achieving the functional purpose of a component or assembly.
  • the term “real-time”, as used herein, means a level of processing responsiveness that a user senses as sufficiently immediate or that enables the processor to keep up with an external process.
  • “electrically coupled”, “electrically connected”, and “electrical communication” mean that the referenced elements are directly or indirectly connected such that an electrical current, or other communication medium, may flow from one to the other.
  • connection may include a direct conductive connection, i.e., without an intervening capacitive, inductive or active element, an inductive connection, a capacitive connection, and/or any other suitable electrical connection. Intervening components may be present.
  • fluidly connected means that the referenced elements are connected such that a fluid (to include a liquid, gas and/or plasma) may flow from one to the other.
  • upstream and downstream describe the position of the referenced elements with respect to a flow path of a fluid and/or gas flowing between and/or near the referenced elements.
  • stream as used herein with respect to particles, means a continuous or near continuous flow of particles.
  • heating contact means that the referenced objects are in proximity of one another such that heat/thermal energy can transfer between them.
  • suspended state combustion refers to the process of combusting a fuel suspended in air.
  • embodiments disclosed herein are primarily described with respect to power plants, it is to be understood that embodiments of the invention may be applicable to any apparatus and/or method that needs to limit and/or eliminate NOx emissions resulting from the combustion of a biofuel, e.g., an incinerator.
  • a system 10 for firing a biofuel (12, FIG. 2 ), e.g., bagasse, switchblade and/or other grasses, wood, peat, straw, and/or other suitable biofuels, in accordance with embodiments of the invention is shown.
  • the system 10 includes a combustion chamber 14, and may further include a controller 16 having at least one processor 18 and a memory device 20, a mill 22, an SCR 24, and/or an exhaust stack 26.
  • the system 10 may form part of a power plant 28 where the combustion chamber 14 is incorporated into a boiler 30 which produces steam for the generation of electricity via a steam turbine generator 32.
  • the mill 22 is operative to receive and process the biofuel 12 for combustion within the combustion chamber 14, i.e., the mill 22 shreds, pulverizes, and/or otherwise conditions the biofuel 12 for firing within the combustion chamber 14.
  • the mill 22 may process the biofuel 12 to particles sizes less than or equal to about 2 mm.
  • the mill 22 may process the biofuel 12 to particles sizes less than or equal to about 1 mm.
  • the mill 22 may be a non-screened styled hammer mill integrated with a flash drying column disposed at the inlet of a beater wheel exhaust fan. The processed biofuel 12 is then transported/fed from the mill 22 to the combustion chamber 14 via conduit 34.
  • the combustion chamber 14 is operative to receive and to facilitate combustion of the biofuel 12, which results in the generation of heat and a flue gas.
  • the flue gas may be sent from the combustion chamber 14 to the SCR 24 via conduit 36.
  • the heat from combusting the biofuel 12 may be captured and used to generate steam, e.g., via water walls in heating contact with the flue gas, which is then sent to the steam turbine generator 32 via conduit 38.
  • the SCR 24 is operative to reduce NOx within the flue gas prior to emission of the flue gas into the atmosphere via conduit 40 and exhaust stack 26.
  • the combustion chamber 14 has two or more stages 42 and 44, and one or more wind boxes 46 and 48 each having a plurality of nozzles/injectors 50, 52, and 54. While FIG. 2 depicts the stages 42 and 44 as discrete and spaced apart, it will be understood that, in embodiments, the stages 42 and 44 may be continuous and flush with one another, i.e., the stages 42 and 44 may smoothly transition from one 42 to the next 44. As shown in FIG. 2 , a first set of wind boxes 46 have nozzles 50 and 52 that are operative to introduce the biofuel 12 and a first air stream 56 into the first stage 42. As will be appreciated, the first air steam 56 may be generated from both primary and secondary air supplies.
  • nozzles 50 may introduce the biofuel 12 into the first stage 42 via primary air, while secondary air is introduced into the first stage 42 via nozzles 52.
  • Particles of the biofuel 12 may be introduced into the combustion chamber 14 via nozzles 50 at a slip speed, with respect to primary air, of between about 0-30,48 meters/second (0-100 feet/second).
  • slip speed refers to the difference in the velocity of the particles of the biofuel 12 and the velocity of the primary air transporting the biofuel 12 via nozzles 50.
  • 100% of the biofuel may be injected by the nozzles 50 within the first stage 42.
  • the nozzles 50 and 52 may be arranged into one or more firing layers 60, 62 and 64, i.e., groups of nozzles 50 and 52 disposed at and/or near the same position along a vertical/longitudinal axis 58 of the combustion chamber 14.
  • a first firing layer 60 may include nozzles 50 that introduce the biofuel 12 and primary air
  • a second firing layer 62 may include nozzles 52 that introduce secondary air
  • a third firing layer 64 may include nozzles 50 that introduce the biofuel 12 and primary air.
  • each firing layer 60, 62, and 64 includes either nozzles 50, that introduce only primary air and the biofuel, or nozzles 52, that introduce only secondary air
  • an individual firing layer 60, 62, and 64 may include both nozzles 50 and nozzles 52.
  • FIG. 2 shows three firing layers 60, 62, and 64 in the first stage 42, it will be understood that embodiments of the invention may include any number of firing layers in the first stage 42.
  • the biofuel 12 and first air stream 56 are ignited such that the biofuel 12 combusts while in a suspended state.
  • the second stage 44 is downstream of the first stage 42 with respect to the combusting biofuel 12.
  • the combusting biofuel 12 forms a fireball 66 that spans the vertical axis 58 from the first 42 to the second 44 stage.
  • a second set of wind boxes 48 have nozzles 54 that are operative to introduce a second air stream 68, e.g., closed coupled over-fired air and/or separated over-fired air, into the second stage 44.
  • a second air stream 68 e.g., closed coupled over-fired air and/or separated over-fired air
  • staged air air staging
  • staged combustion and “staging the combustion” refer to above described splitting of the air consumed by the combustion of the biofuel 12 between the first 42 and second 44 stages via the first 56 and the second 68 air streams.
  • nozzles 54 may be arranged into one or more firing layers 70 and 72 similar to nozzles 50 and 52 and firing layers 60, 62, and 64.
  • the biofuel 12 may be tangentially fired, i.e., the biofuel 12 is introduced into the first stage (42 in FIG. 2 ) via nozzles 50 at an angle ⁇ formed between the trajectory of the primary air component of the first air stream 56, and a radial line 74 extending from the vertical axis 58 to the nozzles 50.
  • the nozzles 50 inject the biofuel 12 via the primary air component of the first air steam 56 tangentially to an imaginary circle 66, representative of the fireball, that is centered on the vertical axis 58.
  • the angle ⁇ may range from 2-10 degrees. While FIG.
  • the nozzles 50 may be disposed at any point within the firing layer 60 outside of the fireball 66.
  • the nozzles (50, 52 and 54 in FIG. 2 ) of the other firing layers (62, 64, 70, and 72 in FIG. 2 ) may be oriented in the same manner as the nozzles 50 of first firing layer 60 shown in FIG. 3 . Accordingly, upon leaving the nozzles 50, the particles of the biofuel 12 follow a helix shaped flight path 76, e.g., a corkscrew, within the fireball 66 as they flow from the first stage 42 to the second stage 44. In other words, tangentially firing the biofuel 12 causes the fireball 66 to rotate about the vertical axis 58.
  • the helix shaped flight path 76 provides for a more controlled combustion reaction for particles of the biofuel 12 over traditional stoker grate firing methods.
  • the helix shaped flight path 76 causes the flue gas to circulate about the "eye"/center of the fireball 66, i.e., the vertical axis 58, which dilutes the oxygen concentration within the fireball 66, thereby retarding the combustion reaction and/or temperature.
  • staging of the combustion reaction additionally retards the combustion reaction and/or combustion temperature, which also increases the de-NOx performance of the combustion reaction.
  • the aforementioned provides for better control over the stoichiometry of the combustion reaction.
  • the first 56 and the second 68 airstreams can be adjusted to regulate the stoichiometry of the combustion reaction in a predictable manner so as to limit the generation of NOx.
  • the first air stream 56 provides a greater than or equal amount of air consumed by the combustion reaction than does the second air stream 68.
  • the first air stream 56 provides about 50-70% of the air consumed by the combustion of the biofuel 12, which in turn regulates the stoichiometry of the combustion reaction of the biofuel 12 in the first stage 42 to between about 0.6-0.8.
  • the second air stream 68 provides the remaining air consumed by combustion reaction, which in turn regulates the stoichiometry of the combustion reaction in the second stage 44 to less than or equal to about 1.2.
  • regulating the stoichiometry of the first 42 and the second 44 stages via staging of the combustion reaction i.e., staging of the introduction of the first 56 and second 68 air streams, drives nitrogen ("N") out of the biofuel 12 to become molecular nitrogen (“N2") within the first stage 42, as opposed to forming NOx as typically occurs in the unpredictable stoichiometric conditions associated with traditional stoker grate methods.
  • N2 molecular nitrogen
  • the nitrogenous species are released from the volatile matter of the biofuel 12 and subsequently reduced to N2 by hydrocarbon intermediates within the first stage 42.
  • combusting the biofuel 12 may result in about 12381, 88Kg/Kwh (0.08 lb/MBtu) of NOx prior to treatment of the flue gas by the SCR (24 in FIG. 1 ) and/or without the use of support fuel.
  • the SCR 24 may further reduce the NOx within the emitted flue gas to less than or equal to about 1547, 72 Kg/Kwh (0.01 lb/ MBtu) without the use of an SNCR.
  • system 10 may include the necessary electronics, software, memory, storage, databases, firmware, logic/state machines, microprocessors, communication links, displays or other visual or audio user interfaces, printing devices, and any other input/output interfaces to perform the functions described herein and/or to achieve the results described herein, which may be executed in real-time.
  • the system 10 may include at least one processor 18 and system memory / data storage structures 20 in the form of a controller 16 that electrically communicates with one or more of the components of the system 10.
  • the memory may include random access memory (“RAM”) and read-only memory (“ROM").
  • the at least one processor may include one or more conventional microprocessors and one or more supplementary co-processors such as math co-processors or the like.
  • the data storage structures discussed herein may include an appropriate combination of magnetic, optical and/or semiconductor memory, and may include, for example, RAM, ROM, flash drive, an optical disc such as a compact disc and/or a hard disk or drive.
  • a software application that provides for control over one or more of the various components of the system 10 may be read into a main memory of the at least one processor from a computer-readable medium.
  • computer-readable medium refers to any medium that provides or participates in providing instructions to the at least one processor 18 (or any other processor of a device described herein) for execution.
  • Such a medium may take many forms, including but not limited to, non-volatile media and volatile media.
  • Non-volatile media include, for example, optical, magnetic, or opto-magnetic disks, such as memory.
  • Volatile media include dynamic random access memory (“DRAM”), which typically constitutes the main memory.
  • DRAM dynamic random access memory
  • Computer-readable media include, for example, a floppy disk, a flexible disk, hard disk, magnetic tape, any other magnetic medium, a CD-ROM, DVD, any other optical medium, a RAM, a PROM, an EPROM or EEPROM (electronically erasable programmable read-only memory), a FLASH-EEPROM, any other memory chip or cartridge, or any other medium from which a computer can read.
  • a method of firing a biofuel includes: introducing the biofuel into a combustion chamber having a first stage and a second stage; combusting the biofuel in a suspended state while flowing from the first stage to the second stage; and introducing a first air stream and a second air stream into the combustion chamber at the first stage and at the second stage, respectively, to facilitate combustion of the biofuel.
  • introducing the biofuel into a combustion chamber further includes tangentially firing at least some of the biofuel at the first stage.
  • the biofuel has a maximum particle size less than or equal to about 2 mm.
  • the first air stream provides a greater than or equal amount of the air consumed by combustion of the biofuel than the second air stream and the first air stream provides about 50-70% of the air consumed by combustion of the biofuel.
  • combusting the biofuel produces less than or equal to about 12381, 77 Kg/Kwh (0.08 lb/MBtu) of NOx.
  • the biofuel is at least one of bagasse, wood, peat, straw, and grass.
  • the system includes a combustion chamber having a first stage and a second stage.
  • the combustion chamber is operative to provide for combustion of the biofuel in a suspended state while flowing from the first stage to the second stage.
  • the combustion chamber further has a first injector and a second injector operative to introduce a first air stream and a second air stream into the combustion chamber at the first stage and at the second stage, respectively, to facilitate combustion of the biofuel.
  • first injector is operative to introduce at least some of the biofuel into the combustion chamber at the first stage via tangential firing.
  • the system further includes a mill operative to provide the biofuel to the combustion chamber at a maximum particle size less than or equal to about 2 mm.
  • the first air stream provides a greater than or equal amount of the air consumed by combustion of the biofuel than the second air stream.
  • the first air stream provides about 50-70% of the air consumed by combustion of the biofuel.
  • the system further includes a selective catalytic reducer that is operative to limit NOx emissions resulting from combustion of the biofuel to less than or equal to about 1547, 72 Kg/Kwh (0.01 lb/MBtu) .
  • the biofuel is at least one of bagasse, wood, peat, straw, and grass.
  • the invention also provides for a non-transitory computer readable medium storing instructions.
  • the stored instructions are configured to adapt a controller to: introduce a biofuel into a combustion chamber having a first stage and a second stage; combust the biofuel in a suspended state while flowing from the first stage to the second stage; and introduce a first air stream and a second air stream into the combustion chamber at the first stage and at the second stage, respectively, to facilitate combustion of the biofuel.
  • at least some of the biofuel is introduced into the combustion chamber at the first stage via tangential firing.
  • the biofuel has a maximum particle size less than or equal to about 2 mm.
  • the first air stream provides a greater than or equal amount of the air consumed by combustion of the biofuel than the second air stream and the first air stream provides about 50-70% of the air consumed by combustion of the biofuel.
  • combustion of the biofuel produces less than or equal to about 12381, 77 Kg/Kwh (0.08 lb/MBtu) of NOx.
  • some embodiments of the invention generate significantly lower amounts of NOx than traditional methods of firing biofuels, e.g., stoker grates.
  • some embodiments of the invention are able to achieve NOx emissions as low as about 0.08 lb/MBtu without the use of an SCR, and as low as about 1547, 72 Kg/Kwh (0.01 lb/MBtu) with an SCR unaccompanied by an SCNR.
  • some embodiments of the invention greatly reduce the operational costs of an encompassing power plant. Additionally, by achieving NOx emissions as low as 12381, 77 Kg/Kwh (0.08 lb/MBtu), the SCR of some embodiments of the invention may be smaller than those typically used in traditional biofuel power plants.
  • the tangential firing of the biofuel 12 in some embodiments causes the combustion reaction to occur "globally", i.e., uniformly, within the first stage 42.
  • some embodiments provide for the ignition and/or mixing of the biofuel 12 and first air stream 56, as well as improved flame stability, without the need for localized, high turbulence injections of fuel and air.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)

Claims (7)

  1. Procédé de combustion d'un biocombustible (12) comprenant :
    • l'introduction du biocombustible (12) dans une chambre de combustion (14) ayant un premier étage (42) et un second étage (44),
    • la combustion du biocombustible (12) dans un état en suspension tout en s'écoulant du premier étage (42) au second étage (44), et
    • l'introduction d'un premier courant d'air (56) et d'un second courant d'air (68) dans la chambre de combustion (14) au niveau du premier étage (42) et au niveau du second étage (44), respectivement, pour faciliter la combustion du biocombustible (12), et
    caractérisé en ce que
    le premier courant d'air (56) fournit une quantité de l'air consommé par la combustion du biocombustible (12) supérieure ou égale à celle du second courant d'air (68), et
    dans lequel le premier courant d'air (56) fournit 50 à 70 % de l'air consommé par la combustion du biocombustible (12).
  2. Procédé selon la revendication 1, caractérisé en ce que l'introduction du biocombustible (12) dans une chambre de combustion (14) comprend en outre le brûlage tangentiel d'au moins une partie du biocombustible (12) au niveau du premier étage (42).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le biocombustible (12) a une taille maximale de particules inférieure ou égale à 2 mm.
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que le biocombustible (12) est au moins l'un parmi la bagasse, le bois, la tourbe, la paille et l'herbe.
  5. Support non transitoire lisible par ordinateur stockant des instructions configurées pour adapter un dispositif de commande (16) pour :
    • introduire un biocombustible (12) dans une chambre de combustion (14) ayant un premier étage (42) et un second étage (44),
    • réaliser la combustion du biocombustible (12) dans un état en suspension tout en s'écoulant du premier étage (42) au second étage (44), et
    • introduire un premier courant d'air (56) et un second courant d'air (68) dans la chambre de combustion (14) au niveau du premier étage (42) et au niveau du second étage (44), respectivement, pour faciliter la combustion du biocombustible (12), et
    caractérisé en ce que le premier courant d'air (56) fournit une quantité de l'air consommé par la combustion du biocombustible (12) supérieure ou égale à celle du second courant d'air (68), dans lequel le premier courant d'air (56) fournit 50 à 70 % de l'air consommé par la combustion du biocombustible (12).
  6. Support non transitoire lisible par ordinateur selon la revendication 5, caractérisé en ce qu'au moins une partie du biocombustible (12) est introduite dans la chambre de combustion (14) au niveau du premier étage (42) par l'intermédiaire d'un brûlage tangentiel.
  7. Support non transitoire lisible par ordinateur selon la revendication 5 ou 6, caractérisé en ce que le biocombustible (12) a une taille maximale de particules inférieure ou égale à 2 mm.
EP18707851.4A 2017-02-17 2018-02-01 Procédé de combustion de biocombustible Active EP3583356B1 (fr)

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US15/435,740 US20180238541A1 (en) 2017-02-17 2017-02-17 System and method for firing a biofuel
PCT/EP2018/052467 WO2018149651A1 (fr) 2017-02-17 2018-02-01 Système et procédé de combustion de biocombustible

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JPS56916A (en) * 1979-06-15 1981-01-08 Hokkaido Togyo Kk Method and apparatus for generating hot blast for incineration of chaff
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ES2356355T3 (es) * 2005-04-12 2011-04-07 Zilkha Biomass Energy Llc Sistema integrado de energía de biomasa.
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EP3583356A1 (fr) 2019-12-25
JP7027435B2 (ja) 2022-03-01
WO2018149651A1 (fr) 2018-08-23
US20180238541A1 (en) 2018-08-23
CN110476015A (zh) 2019-11-19
PL3583356T3 (pl) 2023-03-06
JP2020510803A (ja) 2020-04-09

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