EP2916075B1 - Verfahren und System zur Kraftstoffversorgung einer Brennkammer - Google Patents

Verfahren und System zur Kraftstoffversorgung einer Brennkammer Download PDF

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Publication number
EP2916075B1
EP2916075B1 EP14157773.4A EP14157773A EP2916075B1 EP 2916075 B1 EP2916075 B1 EP 2916075B1 EP 14157773 A EP14157773 A EP 14157773A EP 2916075 B1 EP2916075 B1 EP 2916075B1
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EP
European Patent Office
Prior art keywords
mixture
fuel
combustion chamber
pressure
supercritical
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EP14157773.4A
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English (en)
French (fr)
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EP2916075A1 (de
Inventor
Olaf Stallmann
Siegfried Werner Gerber
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General Electric Technology GmbH
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General Electric Technology GmbH
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00Feeding or distributing other fuel to combustion apparatus
    • F23K5/02Liquid fuel
    • F23K5/08Preparation of fuel
    • F23K5/10Mixing with other fluids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS 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
    • C10L3/00Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/003Additives for gaseous fuels
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20Characteristics of the feedstock or the products
    • C10G2300/30Physical properties of feedstocks or products
    • C10G2300/302Viscosity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/70Blending
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00Specific waste
    • F23G2209/10Liquid waste
    • F23G2209/102Waste oil
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00Pretreatment of solid fuel
    • F23K2201/50Blending
    • F23K2201/503Blending with non-combustible liquids to prepare slurries

Definitions

  • the present invention relates to a method and system for supplying a fuel into a combustion chamber.
  • the combustion chamber is for example the combustion chamber of a boiler or furnace for industrial applications.
  • the combustion chamber can be an oxy fuel combustion chamber, i.e. a combustion chamber that is supplied with a fuel and substantially pure oxygen, this is anyhow not needed and the combustion chamber can be supplied with a fuel and air.
  • the combustion chamber can also be supplied with recirculated flue gas, but this is also not mandatory.
  • the fuel is a high viscosity fluid, i.e. a fluid that alone is not able to pass through the ducts and injectors of the combustion chamber, but needs appropriate helps for this.
  • the fuel is heavy residue.
  • Crude oil undergoes a number of treatments in order to separate different products from it, such as for example, liquefied petroleum gas, gasoline, diesel oil, kerosene, etc.; the remaining of these treatments is the so called heavy residue, that is a high viscosity product that at atmospheric conditions becomes solid.
  • the heavy residue is heated and mixed with kerosene and/or water in order to obtain a low viscosity fluid.
  • Heavy residue must be heated up to a temperature very close to its coking temperature. At the coking temperature, the heavy residue forms solid coke deposits that accumulate in piping and injectors, blocking them.
  • the coking temperature for the heavy residue can begin already at temperatures as low as 200-250°C depending on the originating crude feedstock. When the heavy residue is heated up close to the coking temperature, there is the risk that some fractions of the heavy residue start to coke due to an uneven mixture of the heavy residue.
  • the known solution requires the use of highly expensive fuel, such as kerosene, or high expensive fluid, such as water (in some countries water can be more expensive than oil).
  • An aspect of the invention includes providing a method and system that avoid heating of the heavy residue or require a heating up to a temperature well far apart from the coking temperature, such that coking is prevented.
  • Another aspect of the invention includes providing a method and system that avoid or at least limit the use of expensive fuel (such as kerosene) or fluid (such as water) together with the heavy residue.
  • expensive fuel such as kerosene
  • fluid such as water
  • the described solution addresses heavy residue being fuels that have a viscosity of more than 150 cSt at a temperature of 100°C.
  • the combustion chamber is a part of a boiler for a power plant or an industrial furnace.
  • the combustion chamber 1 combusts a fuel and generates flue gas 2 that is supplied to a flue gas treatment system 3.
  • the flue gas treatment system 3 can be of any kind and, for example, it can include a compressor 5, a mercury removal unit 6 and a drier 7. Heat exchangers 8, 9 are preferably provided upstream of the mercury removal unit 6 and drier 7.
  • the flue gas is supplied into a separation unit 10, where the CO 2 is separated from other gas.
  • the CO 2 is thus supplied to a compressor 12a-c (for example a multi stage, intercooled compressor) where it is compressed up to or above the supercritical pressure, and then to a pump 13 (but this pump is not needed and it is used according to the design) to be further compressed for storage at 14.
  • a compressor 12a-c for example a multi stage, intercooled compressor
  • the separation unit 10 can be of any type, for example figure 2 shows a scheme in which the separation unit includes two stages 15a, 15b of condensation by cooling.
  • CO 2 that condenses 16a, 16b at each condensation stage 15a, 15b is also used as cooling medium.
  • gas 17 being the flue gas deprived of CO 2 is expanded and used as cooling medium at the condensation stages 15a, 15b; the gas 17 is then vented.
  • a heat exchanger 18 can be provided (it is not mandatory and is provided according to the specific design).
  • the heat exchanger 18 is used for cooling the CO 2 compressed at the compressor 12a-c.
  • the system 1 comprises a fuel supply 20, a supercritical pressure CO 2 supply 22, a mixing system 24 for forming a mixture of fuel and supercritical pressure CO 2 , injectors 26 connected to the mixing system 24 for injecting the mixture into the combustion chamber 1.
  • the mixing system can be defined by the converging pipes through which supercritical pressure CO 2 and fuel pass through, or by a dedicated mixer or tank.
  • the combustion chamber has a pressure lower than the CO 2 critical pressure.
  • the system has at least a heat exchanger for heating the mixture.
  • the heat exchangers can include:
  • the heat exchangers include the heat exchanger 29 that allows heating of the mixture of fuel and supercritical pressure CO 2 .
  • heat exchangers 27a, 27b, 28 can be provided, in addition any combination of heat exchangers 27a, 27b, 28, 29 comprising the heat exchanger 29 is possible.
  • the supercritical pressure CO 2 can be supplied from the line that forwards the CO 2 to the storage 14, from a position upstream the pump 13 or downstream the pump 13.
  • the supercritical pressure CO 2 supply 22 can depart from a position between the compressor 12a-c and the heat exchanger 18 ( figures 1 and 2 ) and/or from a position between heat exchanger 18 and the pump 13 and/or from a position between the pump 13 and the storage 14 (figure 14) .
  • flue gas 2 is generated from the combustion of the fuel.
  • the flue gas is compressed at the compressor 5 and then the flue gas undergoes cooling at the heat exchanger 8, mercury removal at the mercury removal unit 6, cooling at the heat exchanger 9, water removal at the drier 7.
  • the flue gas is supplied into the separation unit 10 where CO 2 is separated from the other gas 17 (such as nitrogen, argon, etc.).
  • the gas 17 is vented into the atmosphere and the CO 2 (that is still gas) is supplied to the compressor 12a-c (usually a multistage, intercooled compressor that is used to prepare the CO 2 for storage).
  • the CO 2 is compressed up to or above the critical pressure (critical pressure 72.9 bar or 7.39 MPa); then at the heat exchanger 18 the CO 2 compressed at or above the critical pressure is cooled.
  • the CO 2 can be either:
  • the supercritical CO 2 i.e. CO 2 at or above the critical pressure and at or above the critical temperature (304.25 K) has a high density and can thus be pumped.
  • the CO 2 at or above the critical pressure and below the critical temperature (304.25 K) has a high density and can be pumped. This region is sometimes called the dense phase region.
  • the supercritical CO 2 or CO 2 in the dense phase region is further compressed for storage. Downstream the pump 13 the pressure of the supercritical CO 2 is 100 bar or more.
  • Supercritical pressure CO 2 (the temperature of the supercritical pressure CO 2 can be the supercritical temperature, or it can be above or below the supercritical temperature) is thus preferably supplied from a position downstream the compressor 12a-c and upstream or downstream the pump 13 (when provided) to the mixing system 24.
  • heavy residue is supplied from the fuel supply 20 to the mixing system 24.
  • the mixing system 24 the heavy residue and supercritical pressure CO 2 form a mixture.
  • the supercritical pressure CO 2 is a very good solvent for heavy residue. For this reason, the mixture of heavy residue and supercritical pressure CO 2 can contain a large amount of CO 2 , such that the viscosity of the mixture allows injection in the combustion chamber 1.
  • the mixture (the temperature of the mixture after mixing is typically below 60°C) is heated at the heat exchanger 29.
  • the supercritical pressure CO 2 and/or the heavy residue can be heated at the heat exchangers 27a, 27b, 28, in such a way that that the temperature of the mixture containing the heavy residue and the supercritical pressure CO 2 falls in the preferred temperature range.
  • the preferred range for the temperature of the mixture is between 50-160°C, with a more preferred range between 60-90°C; the temperature is thus well below the coking temperature for the heavy residue.
  • the mixture is supplied to the injectors 26 and is injected into the combustion chamber 1.
  • the pressure of the mixture (containing supercritical pressure CO 2 and heavy residue) suddenly drops.
  • the pressure drop causes a sudden expansion of the COz (up to 10 times or more). Since the CO 2 is mixed with the heavy residue, this expansion helps atomization of heavy residue and its dispersion through the combustion chamber 1. Atomization and dispersion through the combustion chamber 1 help a complete and clean combustion.
  • Figure 5 shows the injectors 26 with nozzles 30, jets of mixtures 31 and the expanding CO 2 that promotes heavy residue dispersion through the combustion chamber 1 and atomization.
  • the fuel such as heavy residue atomized and dispersed through the combustion chamber can thus combust with air or oxygen.
  • Figure 6 shows an example of the nozzle 30; in this figure the arrow indicates the flow through the nozzle 30. In addition figure 6 shows the convergent-divergent design of the nozzle 30 that helps preventing excessive erosion.
  • the present invention also refers to a method for supplying a fuel into a combustion chamber as described in claim 1.
  • the mixture contains between 10-70% by weight of supercritical pressure CO 2 and preferably between 15-25% by weight of supercritical pressure CO 2 .
  • the mixture is heated in order to obtain a heated mixture, whose viscosity is preferably between 15-30 centipoise. This viscosity allows easy injection of the heavy residue through the injector 26.
  • the temperature of the heated mixture is between 50-160°C and preferably between 60-90°C.
  • the mixture and/or the fuel and/or the supercritical pressure CO 2 are heated by cooling the flue gas.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)

Claims (14)

  1. Verfahren zum Zuführen eines Brennstoffs in eine Verbrennungskammer (1), gekennzeichnet durch
    Mischen des Brennstoffs mit CO2 unter überkritischem Druck unter Bildung einer Mischung,
    Einspritzen der Mischung in eine Verbrennungskammer (1), die einen Druck aufweist, der niedriger als der kritische CO2-Druck ist, gekennzeichnet durch:
    Erhitzen der Mischung, um eine erhitzte Mischung zu erhalten; und
    Abführen eines Rauchgases (2) aus der Verbrennungskammer (1); und
    Verwenden des Rauchgases, um die Mischung zu erhitzen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das CO2 unter überkritischem Druck in der Mischung in dem überkritischen Zustand enthalten ist.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Mischung zwischen 10 und 70 Gew.-% CO2 unter überkritischem Druck enthält.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Mischung zwischen 15 und 25 Gew.-% CO2 unter überkritischem Druck enthält.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Mischung und/oder der Brennstoff und/oder das CO2 unter überkritischem Druck erhitzt werden, um eine erhitzte Mischung mit einer Viskosität zwischen 15 und 30 Centipoise zu erhalten.
  6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Temperatur der erhitzten Mischung zwischen 50 und 160 °C liegt.
  7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Temperatur der erhitzten Mischung zwischen 60 und 90 °C liegt.
  8. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Brennstoff eine Viskosität aufweist, die gleich oder größer als 150 Centipoise bei einer Temperatur von 100 °C ist.
  9. Verfahren nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass CO2 von anderem Gas in dem Rauchgas getrennt ist.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das getrennte CO2 bis zu oder über dem überkritischen Druck verdichtet und einem Mischsystem für das Mischen mit dem Brennstoff zugeführt wird.
  11. Verfahren nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass eine Temperatur des CO2 unter überkritischem Druck unter der überkritischen Temperatur liegt.
  12. System zum Zuführen eines Brennstoffs in eine Verbrennungskammer (1), gekennzeichnet durch Umfassen
    einer Brennstoffzufuhr (20),
    einer Zufuhr (22) von CO2 unter überkritischem Druck,
    eines Mischsystem (24) zum Bilden einer Mischung aus Brennstoff und CO2
    unter überkritischem Druck, mindestens eines Einspritzventils (26), das mit dem Mischsystem (24) verbunden ist, wobei das mindestens eine Einspritzventil (26) zum Einspritzen der Mischung in die Verbrennungskammer (1) ist,
    wobei die Verbrennungskammer (1) einen Druck aufweist, der niedriger als der kritische CO2-Druck ist, gekennzeichnet durch ferner umfassen mindestens eines Wärmetauschers 29) zum Erhitzen der Mischung unter Verwendung von Rauchgas.
  13. System nach Anspruch 12, ferner umfassend eine Trenneinheit (10) und einen Verdichter (12a-c),
    wobei
    a. die Trenneinheit (10) konfiguriert ist, um CO2 aus anderen Gasen in dem Rauchgas zu trennen, dem Kompressor (12a-c) das CO2 zuzuführen, wobei der Verdichter konfiguriert ist, um das CO2 bis zu oder über überkritischen Druck zu verdichten; und wobei
    b. das System ferner konfiguriert ist, um dem Mischsystem (24) das verdichtete CO2 über Zufuhr (22) von CO2 unter überkritischem Druck zuzuführen.
  14. System nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass dem Mischsystem (24) bei einer Temperatur unterhalb der überkritischen Temperatur das CO2 unter überkritischem Druck zugeführt wird.
EP14157773.4A 2014-03-05 2014-03-05 Verfahren und System zur Kraftstoffversorgung einer Brennkammer Active EP2916075B1 (de)

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Application Number Priority Date Filing Date Title
EP14157773.4A EP2916075B1 (de) 2014-03-05 2014-03-05 Verfahren und System zur Kraftstoffversorgung einer Brennkammer

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EP14157773.4A EP2916075B1 (de) 2014-03-05 2014-03-05 Verfahren und System zur Kraftstoffversorgung einer Brennkammer

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EP2916075B1 true EP2916075B1 (de) 2023-10-11

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10596583B2 (en) * 2016-05-11 2020-03-24 General Electric Technology Gmbh System and method for regulating the viscosity of a fluid prior to atomization
CN107883380A (zh) * 2017-11-09 2018-04-06 北京恒信卓元科技有限公司 气化熔融垃圾处理装置及其工艺方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170727A (en) * 1991-03-29 1992-12-15 Union Carbide Chemicals & Plastics Technology Corporation Supercritical fluids as diluents in combustion of liquid fuels and waste materials
DE19619559A1 (de) * 1996-05-14 1997-11-27 Karlsruhe Forschzent Verfahren zum Verbrennen von Schadstoffen in überkritischem Kohlendioxid
US7377112B2 (en) * 2005-06-22 2008-05-27 United Technologies Corporation Fuel deoxygenation for improved combustion performance
US20070144415A1 (en) * 2005-11-29 2007-06-28 Varagani Rajani K Coal Upgrading Process Utilizing Nitrogen and/or Carbon Dioxide
DE102010026792B4 (de) * 2010-07-10 2012-02-16 Messer Group Gmbh Verfahren zum Betreiben eines Oxyfuel-Kraftwerks
KR101529691B1 (ko) * 2011-05-24 2015-06-17 허 마제스티 더 퀸 인 라이트 오브 캐나다 에즈 리프레젠티드 바이 더 미니스터 오브 내츄럴 리소시스 에너지 전환 시스템과 연결하기 위한 이산화탄소 포획 고압 화석 연료 산소 연소 시스템

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