US20140305131A1 - Method and device for feeding back exhaust gas from a gas turbine with a downstream waste heat boiler - Google Patents
Method and device for feeding back exhaust gas from a gas turbine with a downstream waste heat boiler Download PDFInfo
- Publication number
- US20140305131A1 US20140305131A1 US14/238,929 US201214238929A US2014305131A1 US 20140305131 A1 US20140305131 A1 US 20140305131A1 US 201214238929 A US201214238929 A US 201214238929A US 2014305131 A1 US2014305131 A1 US 2014305131A1
- Authority
- US
- United States
- Prior art keywords
- gas
- waste
- heat boiler
- gas turbine
- waste heat
- 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.)
- Abandoned
Links
- 239000007789 gas Substances 0.000 title claims abstract description 169
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000002918 waste heat Substances 0.000 title claims abstract description 43
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 154
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 81
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 80
- 238000002485 combustion reaction Methods 0.000 claims abstract description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001301 oxygen Substances 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 26
- 239000002912 waste gas Substances 0.000 claims description 83
- 239000002737 fuel gas Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 19
- 238000004064 recycling Methods 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000003786 synthesis reaction Methods 0.000 claims description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 238000002309 gasification Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 5
- 239000003345 natural gas Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000005406 washing Methods 0.000 abstract 1
- 238000005201 scrubbing Methods 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 13
- 239000007800 oxidant agent Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 7
- 239000000470 constituent Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 239000003915 liquefied petroleum gas Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 235000013844 butane Nutrition 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000209504 Poaceae Species 0.000 description 1
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical class CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical class [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 235000013849 propane Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
- F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/067—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion heat coming from a gasification or pyrolysis process, e.g. coal gasification
- F01K23/068—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion heat coming from a gasification or pyrolysis process, e.g. coal gasification in combination with an oxygen producing plant, e.g. an air separation plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C1/00—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid
- F02C1/04—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly
- F02C1/08—Semi-closed cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/34—Gas-turbine plants characterised by the use of combustion products as the working fluid with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/611—Sequestration of CO2
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/32—Direct CO2 mitigation
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Definitions
- the invention relates to a process for the recycling of waste gas from a gas turbine with downstream waste heat boiler, the said waste gas being metered to the supply air stream of a gas turbine in such a way that the temperature and the composition of the waste gas can be controlled and in this way highly concentrated carbon dioxide (CO 2 ) is obtained which can be injected into a storage site so that the carbon dioxide balance for the entire process can be kept low or is negligible.
- metered recycling of the waste gas it is possible to decrease the temperature in the gas turbine and to considerably increase the carbon dioxide content in the waste gas so that, after combustion and heat exchange, gas scrubbing will be possible and, on the one hand, the carbon dioxide can be recovered and, on the other hand, the content of free oxygen in the waste gas can be decreased.
- an oxygen-enriched gas is fed together with a fuel gas to a gas turbine for combustion and then diluted with waste gas so that the temperature can be kept low despite oxygen enrichment, and, after combustion and heat exchange, a highly concentrated carbon dioxide is obtained.
- gases that are suitable for driving gas turbines can be used, which are ultimately gases which can be fed to the gas chamber of a turbine and do not produce any corrosive residues or combustion products during combustion.
- gases for example, natural gas, refinery gases, biogases or synthesis gases.
- refinery gases are particularly understood to be such gases that form during the processing of liquid fossil fuels, such as butane, hydrogenous gases or liquid gas, also referred to as LPG (‘Liquefied Petroleum Gas’). If, for example, synthesis gas is used, it can be produced in any way.
- a process for the production of synthesis gas is, for example, the coal gasification where a finely ground carbonaceous fuel is gasified with an oxygenous gas in an entrained flow gasification.
- the synthesis gas thus produced can be used for driving gas turbines by means of combustion.
- gas scrubbing is normally carried out prior to combustion so that the fuel gas does not produce any corrosive gases during combustion and a cost-efficient service life of the gas turbine can be achieved.
- the temperature in the combustion of fuel gases in gas turbines is normally up to 2200° C. After combustion the hot waste gas is fed to a waste heat boiler so that the sensible heat of the waste gas can be used for the recovery of steam.
- carbon dioxide (CO 2 ) and water (H 2 O) form so that—except for these gases—the gas will only contain nitrogen (N 2 ) if the fuel gas is subjected to gas scrubbing prior to combustion. If pure oxygen is used for combustion, the waste gas virtually only contains carbon dioxide and water.
- Carbon dioxide is a greenhouse gas which contributes to global warming. For this reason, many countries aim at keeping the amount of carbon dioxide emitted into the earth's atmosphere at a low level. It is therefore technically feasible to design processes in such a way that they produce less or no carbon dioxide right from the beginning. As the use of pure hydrogen as fuel gas is normally not cost-efficient, efforts are made to provide processes which render a low or negligible carbon dioxide emission, which is normally achieved by gas scrubbing. This process serves to remove the carbon dioxide from the combustion gases by absorption of the carbon dioxide with the aid of an absorbing solvent. The carbon dioxide is then recovered during the regeneration of the absorbing solvent.
- the carbon dioxide can be compressed and injected into a storage site. In this way, this gas is permanently kept from entering the atmosphere.
- An example of a process for the re-injection of compressed carbon dioxide into a storage site is given in EP1258595A2.
- a starting point for this is to keep the composition of the waste gas from a gas turbine such that gas scrubbing requires as little effort as possible. This means primarily to keep the carbon dioxide content in the waste gas as high as possible so that gas scrubbing has to render only little enrichment.
- the oxygen content of the waste gas to be treated should be as low as possible because oxygen impairs the operability of most absorbing solvents. Many absorbing solvents used for the removal of carbon dioxide by gas scrubbing contain amino groups which react with oxygen. For this reason, the composition of the waste gas from a gas turbine is important for the cost-efficiency of the entire process.
- the present invention achieves this objective by a process which exists in two embodiments which, to a certain extent, represent peripheral areas of a main process step, this main process step consisting in metering a part-stream of the cooled waste gas leaving the waste heat boiler to the combustion air of the gas turbine after heat exchange so that a higher content of carbon dioxide is obtained and, after combustion, heat exchange for the recovery of thermal energy and gas scrubbing are carried out, carbon dioxide (CO 2 ) being obtained.
- This method represents a peripheral area, the other peripheral area consisting in avoiding gas scrubbing by using pure oxygen as oxidising agent in the gas turbine. As a result, only carbon dioxide and water are produced during combustion so that pure carbon dioxide (CO 2 ) is obtained after condensation of the water.
- the waste gas is metered to the combustion air of the gas turbine in such a way that as much waste gas as possible is recycled but combustion can nevertheless be performed easily.
- the latter is preferably controlled on the basis of measuring parameters, a measuring parameter consisting in the measurement of the combustion temperature in the gas turbine. Proper handling of this method will yield a waste gas which will contain only little oxygen. It is also possible to use an oxygen-enriched gas for the combustion in the gas turbine and to carry out gas scrubbing after heat recovery. In this case, the oxygen content in the waste gas is advantageously maintained at such a level that there is no notable impairment to gas scrubbing.
- carbon dioxide is preferably obtained in high concentration. It can be pure or technically pure but can actually be of any concentration.
- Claim is particularly laid to a process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine by burning a fuel gas suitable for combustion with an oxygenous gas in a gas turbine so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated, and which is characterised in that a part-stream of the cooled waste gas is metered to the combustion air of the gas turbine after having left the waste heat boiler, the said waste gas being fed to the gas turbine for combustion, and another part-stream of the cooled waste gas is fed to a gas scrubber for the absorption of acid gases after having left the waste heat boiler, with carbon dioxide (CO 2 ) being recovered from the said gas scrubber.
- a fuel gas suitable for combustion with an oxygenous gas in a gas turbine so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated
- a part-stream of the cooled waste gas is metered to the combustion air of the gas turbine after having left
- Claim is also laid to a process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine by burning a fuel gas suitable for combustion with an oxygenous gas in a gas turbine with an oxygen-enriched gas so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated, characterised in that a part-stream of the cooled waste gas is metered to the combustion air of the gas turbine after having left the waste heat boiler, and the other part-stream is cooled so that water condenses and carbon dioxide (CO 2 ) is recovered.
- a fuel gas suitable for combustion with an oxygenous gas in a gas turbine with an oxygen-enriched gas so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated
- Processes for the use of gas turbines including the recycling of waste gas part-streams are basically known from EP0453059B1 or JP4116232A. The latter, however, do not include the recovery of carbon dioxide and do not meter the recycled waste gas.
- the oxygen-enriched gas is preferably taken from an air separation unit.
- the said gas can also be provided by a pressure swing adsorption unit.
- the oxygen-enriched gas can actually be produced in any way desired.
- the use of an oxygen-enriched gas as oxidising agent in the gas turbine causes an increase of the carbon dioxide content after combustion and a decrease of the nitrogen content in the waste gas. Gas scrubbing is thus simplified as the gas ballast of the nitrogen during gas scrubbing is low. It will nevertheless be required if the nitrogen content in the carbon dioxide of the waste gas is technically existent.
- a part-stream of the cooled waste gas is fed to a gas scrubber for the absorption of acid gases after having left the waste heat boiler, with carbon dioxide (CO 2 ) being recovered from the said gas scrubber.
- CO 2 carbon dioxide
- the oxygen-enriched gas is pure oxygen, the other part-stream obtained being cooled so that water condenses and carbon dioxide (CO 2 ) is recovered.
- CO 2 carbon dioxide
- the carbon dioxide may then be compressed and injected into the storage site. If pure oxygen is used, there is no nitrogen content in the waste gas. In this case there is no need for gas scrubbing.
- the fuel gas for the gas turbine can be of any type as long as it is suitable for combustion in a gas turbine. In this context, it is particularly important that during combustion the fuel gas does not deliver any corrosive constituents which may affect the turbine.
- the fuel gas is synthesis gas.
- the synthesis gas is a synthesis gas which originates from a coal gasification reaction in which a finely ground carbonaceous fuel gas is gasified with an oxygenous gas in an entrained flow reaction.
- Coal gasification reactions for the production of synthesis gas are well known from the state of the art; an exemplary embodiment of a coal gasification reaction for the recovery of synthesis gas is given in EP0616022B1.
- the fuel gas can also be natural gas.
- Prior to combustion in a gas turbine it can be treated so that corrosive constituents and particularly sulphur compounds are removed.
- An example of natural gas treatment is given in EP920901B1. The treated natural gas is then used for firing the gas turbine.
- the fuel gas is a refinery gas.
- gases which can be used for the heating of gas turbines.
- LPG Liquefied Petroleum Gas
- propanes and butanes and hydrogen examples are LPG (“Liquefied Petroleum Gas”), propanes and butanes and hydrogen.
- the latter can be added to the combustion gas of a gas turbine if it is intended to use the process embodying the invention.
- the fuel gas is biogas.
- This is a fuel gas produced from biological raw materials such as wood, manure, straw or grasses. These may, for example, be obtained by fermentation but also, for example, by gasification.
- the carbon dioxide obtained can then be compressed and injected into a carbon dioxide storage site.
- this is the preferred embodiment within the framework of the invention, it is just as well conceivable to use the carbon dioxide for other purposes or to use a part-stream for re-injection into a storage site.
- Metering of the cooled and recycled waste gas from a gas turbine with waste heat boiler is preferably done on the basis of measured values. This is typically the temperature of the waste gas from the gas turbine directly downstream of the gas turbine and prior to entering the waste heat boiler.
- the portion of the recycled gas stream from the waste heat boiler and the amount of the part-stream metered into the gas turbine are hence controlled by the values measured for the temperature of the waste gas from the gas turbine.
- Gas constituents suitable for measurement are, for example, carbon dioxide (CO 2 ) or oxygen (O 2 ). Controlling is carried out either manually or by computer. Claim is also laid to a contrivance for running the process embodying the invention, provided there is a corresponding interconnection of plant sections.
- mechanical energy is generated which can be used for any purpose. It can, for example, be used for the generation of electric power.
- the thermal energy from the waste heat boiler can also be used for any purpose.
- the latter can preferably be used for the generation of steam and, via a turbine, for the generation of electric power. In the process embodying the invention actually as many turbines as desired can be used.
- the invention has the advantage to provide treated carbon dioxide (CO 2 ) from a gas turbine for compression and re-injection into a storage site, the cost efficiency of the process being improved by recycling a part-stream of the waste gas from the gas turbine in gas flow direction downstream of the waste heat boiler to the gas turbine and metering it to the combustion air so that the carbon dioxide content in the waste gas is increased in such a way that either gas scrubbing for the removal of carbon dioxide from the waste gas can be carried out in a cost efficient way or, in an ideal configuration, completely omitted by using an oxygen-enriched oxidising agent.
- CO 2 treated carbon dioxide
- FIG. 1 shows the process embodying the invention in which a first part-stream of the waste gas is recycled downstream of the waste heat boiler and metered to the gas turbine, and the second part-stream of the waste gas is fed downstream of the waste heat boiler to a gas scrubber for carbon dioxide.
- FIG. 2 shows the process embodying the invention in which a first part-stream of the waste gas is recycled downstream of the waste heat boiler and metered to the gas turbine which is heated with pure oxygen as oxidising agent, and the second part-stream of the waste gas condenses downstream of the waste heat boiler and is used as pure carbon dioxide stream.
- FIG. 1 shows a gas turbine ( 1 ) heated with a carbonaceous fuel gas ( 2 ) and combustion air ( 3 ), the combustion air ( 3 ) being added via a mixing valve ( 4 ) and mechanical energy being generated by the combustion in the gas turbine ( 1 ).
- the waste gas ( 5 ) from the gas turbine ( 1 ) is fed to a waste heat boiler ( 6 ) where the waste gas ( 5 ) dissipates its sensible heat via indirect heat exchange to water ( 6 a ) supplied and as a result steam ( 6 b ) is generated.
- a part-stream of the waste gas ( 5 a ) is recycled and added to the combustion air ( 3 ) via the mixing valve ( 4 ).
- the carbon dioxide content in the waste gas ( 5 ) increases.
- the temperature of the combustion gas and the waste gas ( 5 ) is lowered, this being of non-impairing effect on the gas turbine ( 1 ).
- the other part-stream of the waste gas ( 5 b ) is fed to a gas scrubber ( 7 ) containing an absorbing solvent used to remove the carbon dioxide (CO 2 , 8 ) by scrubbing, a tail gas free of carbon dioxide ( 7 a ) being obtained.
- This is recovered during the regeneration ( 9 ) of the solvent and can be compressed and injected into a storage site.
- the recycled amount ( 5 a ) is metered by controlling the mixing valve ( 4 ) on the basis of the measurement of the temperature of the waste gas ( 5 ) with the aid of a sensor ( 10 ) and is controlled by a computer ( 10 a ).
- FIG. 2 also shows a gas turbine ( 1 ) heated with a carbonaceous fuel gas ( 2 ) and pure oxygen ( 11 ) from an air separation unit ( 11 a ) which separates the exhaust air ( 3 a ) into oxygen ( 11 ) and the residual air constituents ( 11 b ), with pure oxygen ( 11 ) being added as oxidising agent via a mixing valve ( 4 ) and mechanical energy being generated by the combustion in the gas turbine ( 1 ).
- the waste gas ( 5 ) from the gas turbine ( 1 ) is fed to a waste heat boiler where the waste gas ( 5 ) dissipates its sensible heat via indirect heat exchange to water ( 6 a ) supplied and as a result steam ( 6 b ) is generated.
- a part-stream of the waste gas ( 5 a ) is recycled and added to the oxygen ( 11 ) via the mixing valve ( 4 ).
- the waste gas ( 5 ) contains only water (H 2 O) and carbon dioxide (CO 2 ).
- the second part-stream ( 5 b ) of the cooled waste gas is further cooled for condensation ( 5 c ) so that virtually pure carbon dioxide ( 8 ) is obtained after separation of the condensed water ( 5 d ).
- the temperature of the combustion gas and the waste gas ( 5 ) is lowered by the recycled amount, this being of non-impairing effect on the gas turbine ( 1 ).
- the carbon dioxide ( 8 ) can be compressed and injected into a storage site.
- the recycled amount is metered by controlling the mixing valve ( 4 ) on the basis of the measurement of the temperature of the waste gas ( 5 ) with the aid of a sensor ( 10 ) and is controlled by a computer ( 10 a ).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Treating Waste Gases (AREA)
Abstract
A method for feeding back exhaust gas from a gas turbine with a downstream waste heat boiler, wherein this exhaust gas is metered into the air inflow stream of a gas turbine, with the result that the temperature and the composition of the exhaust gas can be controlled, and in this way highly concentrated carbon dioxide (CO2) is obtained which can be injected into a storage facility, so that the balance of the carbon dioxide for the entire process can be kept low or is negligible. The temperature in the gas turbine can be lowered and the proportion of carbon dioxide in the exhaust gas can be considerably increased. After combustion has taken place and heat has been exchanged, gas washing is possible, carbon dioxide can be recovered and, the proportion of free oxygen in the exhaust gas can be lowered.
Description
- The invention relates to a process for the recycling of waste gas from a gas turbine with downstream waste heat boiler, the said waste gas being metered to the supply air stream of a gas turbine in such a way that the temperature and the composition of the waste gas can be controlled and in this way highly concentrated carbon dioxide (CO2) is obtained which can be injected into a storage site so that the carbon dioxide balance for the entire process can be kept low or is negligible. By metered recycling of the waste gas it is possible to decrease the temperature in the gas turbine and to considerably increase the carbon dioxide content in the waste gas so that, after combustion and heat exchange, gas scrubbing will be possible and, on the one hand, the carbon dioxide can be recovered and, on the other hand, the content of free oxygen in the waste gas can be decreased. In another embodiment of the invention an oxygen-enriched gas is fed together with a fuel gas to a gas turbine for combustion and then diluted with waste gas so that the temperature can be kept low despite oxygen enrichment, and, after combustion and heat exchange, a highly concentrated carbon dioxide is obtained.
- Many processes for the generation of energy use the combustion of combustible gases in a gas turbine which converts the direct combustion energy to mechanical energy. The hot waste gases are then cooled in a heat exchanger, with steam being generated and used, in turn, for driving a second turbine which also generates mechanical energy. The mechanical energy can, in turn, be used for various purposes; it is frequently used for driving auxiliary units or for generating electric energy. Such processes which are frequently used in gas and steam power plants and operate by the principle of combined heat and power generation are of high efficiency.
- As a fuel gas for such processes all gases that are suitable for driving gas turbines can be used, which are ultimately gases which can be fed to the gas chamber of a turbine and do not produce any corrosive residues or combustion products during combustion. These are, for example, natural gas, refinery gases, biogases or synthesis gases. Refinery gases are particularly understood to be such gases that form during the processing of liquid fossil fuels, such as butane, hydrogenous gases or liquid gas, also referred to as LPG (‘Liquefied Petroleum Gas’). If, for example, synthesis gas is used, it can be produced in any way. A process for the production of synthesis gas is, for example, the coal gasification where a finely ground carbonaceous fuel is gasified with an oxygenous gas in an entrained flow gasification. The synthesis gas thus produced can be used for driving gas turbines by means of combustion. To ensure the usability of the fuel gas in a gas turbine, gas scrubbing is normally carried out prior to combustion so that the fuel gas does not produce any corrosive gases during combustion and a cost-efficient service life of the gas turbine can be achieved.
- The temperature in the combustion of fuel gases in gas turbines is normally up to 2200° C. After combustion the hot waste gas is fed to a waste heat boiler so that the sensible heat of the waste gas can be used for the recovery of steam. During combustion carbon dioxide (CO2) and water (H2O) form so that—except for these gases—the gas will only contain nitrogen (N2) if the fuel gas is subjected to gas scrubbing prior to combustion. If pure oxygen is used for combustion, the waste gas virtually only contains carbon dioxide and water.
- Carbon dioxide is a greenhouse gas which contributes to global warming. For this reason, many countries aim at keeping the amount of carbon dioxide emitted into the earth's atmosphere at a low level. It is therefore technically feasible to design processes in such a way that they produce less or no carbon dioxide right from the beginning. As the use of pure hydrogen as fuel gas is normally not cost-efficient, efforts are made to provide processes which render a low or negligible carbon dioxide emission, which is normally achieved by gas scrubbing. This process serves to remove the carbon dioxide from the combustion gases by absorption of the carbon dioxide with the aid of an absorbing solvent. The carbon dioxide is then recovered during the regeneration of the absorbing solvent.
- In order to avoid discharge of the carbon dioxide obtained from gas scrubbing to the atmosphere, the carbon dioxide can be compressed and injected into a storage site. In this way, this gas is permanently kept from entering the atmosphere. An example of a process for the re-injection of compressed carbon dioxide into a storage site is given in EP1258595A2.
- Even though such a re-injection of carbon dioxide into a storage site keeps the emission of carbon dioxide into the atmosphere low or at a negligible level, it reduces the cost-efficiency of the process. The gas scrubbing for the removal of carbon dioxide, the compression of the carbon dioxide, possible transport of the compressed carbon dioxide and the re-injection into a storage site result in additional costs which have an impact on the cost-efficiency of the process. For this reason, efforts are made to keep the costs for the additional process steps required for the downstream processing of the carbon dioxide as low as possible.
- A starting point for this is to keep the composition of the waste gas from a gas turbine such that gas scrubbing requires as little effort as possible. This means primarily to keep the carbon dioxide content in the waste gas as high as possible so that gas scrubbing has to render only little enrichment. In addition, the oxygen content of the waste gas to be treated should be as low as possible because oxygen impairs the operability of most absorbing solvents. Many absorbing solvents used for the removal of carbon dioxide by gas scrubbing contain amino groups which react with oxygen. For this reason, the composition of the waste gas from a gas turbine is important for the cost-efficiency of the entire process.
- It is therefore of advantage if a process for operating a gas turbine with downstream heat recovery system produces a waste gas which has a high carbon dioxide content and a very low oxygen content (O2) right from the beginning. In addition, the content of nitrogen as ballast gas should be as low as possible. Other gases should also be present in minor quantities only. However, this is normally the case anyway if gas scrubbing is carried out prior to combustion and combustion is carried out stoichiometrically.
- It is therefore the objective to provide a process which provides a highest possible carbon dioxide content in percent by volume and a lowest possible oxygen content in percent by volume. In addition, the process is to allow keeping the nitrogen content in percent by volume at a low level.
- The present invention achieves this objective by a process which exists in two embodiments which, to a certain extent, represent peripheral areas of a main process step, this main process step consisting in metering a part-stream of the cooled waste gas leaving the waste heat boiler to the combustion air of the gas turbine after heat exchange so that a higher content of carbon dioxide is obtained and, after combustion, heat exchange for the recovery of thermal energy and gas scrubbing are carried out, carbon dioxide (CO2) being obtained. This method, to a certain extent, represents a peripheral area, the other peripheral area consisting in avoiding gas scrubbing by using pure oxygen as oxidising agent in the gas turbine. As a result, only carbon dioxide and water are produced during combustion so that pure carbon dioxide (CO2) is obtained after condensation of the water.
- The waste gas is metered to the combustion air of the gas turbine in such a way that as much waste gas as possible is recycled but combustion can nevertheless be performed easily. The latter is preferably controlled on the basis of measuring parameters, a measuring parameter consisting in the measurement of the combustion temperature in the gas turbine. Proper handling of this method will yield a waste gas which will contain only little oxygen. It is also possible to use an oxygen-enriched gas for the combustion in the gas turbine and to carry out gas scrubbing after heat recovery. In this case, the oxygen content in the waste gas is advantageously maintained at such a level that there is no notable impairment to gas scrubbing.
- In so doing, carbon dioxide is preferably obtained in high concentration. It can be pure or technically pure but can actually be of any concentration.
- Claim is particularly laid to a process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine by burning a fuel gas suitable for combustion with an oxygenous gas in a gas turbine so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated, and which is characterised in that a part-stream of the cooled waste gas is metered to the combustion air of the gas turbine after having left the waste heat boiler, the said waste gas being fed to the gas turbine for combustion, and another part-stream of the cooled waste gas is fed to a gas scrubber for the absorption of acid gases after having left the waste heat boiler, with carbon dioxide (CO2) being recovered from the said gas scrubber.
- Claim is also laid to a process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine by burning a fuel gas suitable for combustion with an oxygenous gas in a gas turbine with an oxygen-enriched gas so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated, characterised in that a part-stream of the cooled waste gas is metered to the combustion air of the gas turbine after having left the waste heat boiler, and the other part-stream is cooled so that water condenses and carbon dioxide (CO2) is recovered.
- Processes for the use of gas turbines including the recycling of waste gas part-streams are basically known from EP0453059B1 or JP4116232A. The latter, however, do not include the recovery of carbon dioxide and do not meter the recycled waste gas.
- The oxygen-enriched gas is preferably taken from an air separation unit. However, the said gas can also be provided by a pressure swing adsorption unit. The oxygen-enriched gas can actually be produced in any way desired. The use of an oxygen-enriched gas as oxidising agent in the gas turbine causes an increase of the carbon dioxide content after combustion and a decrease of the nitrogen content in the waste gas. Gas scrubbing is thus simplified as the gas ballast of the nitrogen during gas scrubbing is low. It will nevertheless be required if the nitrogen content in the carbon dioxide of the waste gas is technically existent. In one embodiment of the invention where oxygen-enriched combustion air is used, a part-stream of the cooled waste gas is fed to a gas scrubber for the absorption of acid gases after having left the waste heat boiler, with carbon dioxide (CO2) being recovered from the said gas scrubber. When using an oxygen-enriched gas as oxidising agent combustion must be done properly by metering cooled waste gas in order to keep the residual oxygen content in the combustion at a low level.
- In one embodiment of the invention the oxygen-enriched gas is pure oxygen, the other part-stream obtained being cooled so that water condenses and carbon dioxide (CO2) is recovered. As in the case of the other embodiments the carbon dioxide may then be compressed and injected into the storage site. If pure oxygen is used, there is no nitrogen content in the waste gas. In this case there is no need for gas scrubbing.
- The fuel gas for the gas turbine can be of any type as long as it is suitable for combustion in a gas turbine. In this context, it is particularly important that during combustion the fuel gas does not deliver any corrosive constituents which may affect the turbine. In one embodiment of the invention the fuel gas is synthesis gas.
- In another advantageous embodiment the synthesis gas is a synthesis gas which originates from a coal gasification reaction in which a finely ground carbonaceous fuel gas is gasified with an oxygenous gas in an entrained flow reaction. Coal gasification reactions for the production of synthesis gas are well known from the state of the art; an exemplary embodiment of a coal gasification reaction for the recovery of synthesis gas is given in EP0616022B1.
- However, the fuel gas can also be natural gas. Prior to combustion in a gas turbine, it can be treated so that corrosive constituents and particularly sulphur compounds are removed. An example of natural gas treatment is given in EP920901B1. The treated natural gas is then used for firing the gas turbine.
- In another embodiment of the invention the fuel gas is a refinery gas. The treatment of liquid fossil fuels frequently yields gases which can be used for the heating of gas turbines. Examples are LPG (“Liquefied Petroleum Gas”), propanes and butanes and hydrogen. In an exemplary embodiment the latter can be added to the combustion gas of a gas turbine if it is intended to use the process embodying the invention.
- In another embodiment of the invention the fuel gas is biogas. This is a fuel gas produced from biological raw materials such as wood, manure, straw or grasses. These may, for example, be obtained by fermentation but also, for example, by gasification.
- The carbon dioxide obtained can then be compressed and injected into a carbon dioxide storage site. Although this is the preferred embodiment within the framework of the invention, it is just as well conceivable to use the carbon dioxide for other purposes or to use a part-stream for re-injection into a storage site.
- Metering of the cooled and recycled waste gas from a gas turbine with waste heat boiler is preferably done on the basis of measured values. This is typically the temperature of the waste gas from the gas turbine directly downstream of the gas turbine and prior to entering the waste heat boiler. In one embodiment of the invention the portion of the recycled gas stream from the waste heat boiler and the amount of the part-stream metered into the gas turbine are hence controlled by the values measured for the temperature of the waste gas from the gas turbine. This is a preferred embodiment but it is also feasible, for example, to measure the gas constituents in the waste gas and to meter the cooled and recycled waste gas on the basis of these measured values. Gas constituents suitable for measurement are, for example, carbon dioxide (CO2) or oxygen (O2). Controlling is carried out either manually or by computer. Claim is also laid to a contrivance for running the process embodying the invention, provided there is a corresponding interconnection of plant sections.
- With the aid of the gas turbine, mechanical energy is generated which can be used for any purpose. It can, for example, be used for the generation of electric power. The thermal energy from the waste heat boiler can also be used for any purpose. The latter can preferably be used for the generation of steam and, via a turbine, for the generation of electric power. In the process embodying the invention actually as many turbines as desired can be used.
- The invention has the advantage to provide treated carbon dioxide (CO2) from a gas turbine for compression and re-injection into a storage site, the cost efficiency of the process being improved by recycling a part-stream of the waste gas from the gas turbine in gas flow direction downstream of the waste heat boiler to the gas turbine and metering it to the combustion air so that the carbon dioxide content in the waste gas is increased in such a way that either gas scrubbing for the removal of carbon dioxide from the waste gas can be carried out in a cost efficient way or, in an ideal configuration, completely omitted by using an oxygen-enriched oxidising agent.
- The invention is explained by means of two drawings showing exemplary embodiments only and not being restricted to the latter.
-
FIG. 1 shows the process embodying the invention in which a first part-stream of the waste gas is recycled downstream of the waste heat boiler and metered to the gas turbine, and the second part-stream of the waste gas is fed downstream of the waste heat boiler to a gas scrubber for carbon dioxide. -
FIG. 2 shows the process embodying the invention in which a first part-stream of the waste gas is recycled downstream of the waste heat boiler and metered to the gas turbine which is heated with pure oxygen as oxidising agent, and the second part-stream of the waste gas condenses downstream of the waste heat boiler and is used as pure carbon dioxide stream. -
FIG. 1 shows a gas turbine (1) heated with a carbonaceous fuel gas (2) and combustion air (3), the combustion air (3) being added via a mixing valve (4) and mechanical energy being generated by the combustion in the gas turbine (1). The waste gas (5) from the gas turbine (1) is fed to a waste heat boiler (6) where the waste gas (5) dissipates its sensible heat via indirect heat exchange to water (6 a) supplied and as a result steam (6 b) is generated. A part-stream of the waste gas (5 a) is recycled and added to the combustion air (3) via the mixing valve (4). As a result, the carbon dioxide content in the waste gas (5) increases. In addition, the temperature of the combustion gas and the waste gas (5) is lowered, this being of non-impairing effect on the gas turbine (1). The other part-stream of the waste gas (5 b) is fed to a gas scrubber (7) containing an absorbing solvent used to remove the carbon dioxide (CO2, 8) by scrubbing, a tail gas free of carbon dioxide (7 a) being obtained. This is recovered during the regeneration (9) of the solvent and can be compressed and injected into a storage site. The recycled amount (5 a) is metered by controlling the mixing valve (4) on the basis of the measurement of the temperature of the waste gas (5) with the aid of a sensor (10) and is controlled by a computer (10 a). -
FIG. 2 also shows a gas turbine (1) heated with a carbonaceous fuel gas (2) and pure oxygen (11) from an air separation unit (11 a) which separates the exhaust air (3 a) into oxygen (11) and the residual air constituents (11 b), with pure oxygen (11) being added as oxidising agent via a mixing valve (4) and mechanical energy being generated by the combustion in the gas turbine (1). The waste gas (5) from the gas turbine (1) is fed to a waste heat boiler where the waste gas (5) dissipates its sensible heat via indirect heat exchange to water (6 a) supplied and as a result steam (6 b) is generated. A part-stream of the waste gas (5 a) is recycled and added to the oxygen (11) via the mixing valve (4). As pure oxygen (11) is used as oxidising agent, the waste gas (5) contains only water (H2O) and carbon dioxide (CO2). The second part-stream (5 b) of the cooled waste gas is further cooled for condensation (5 c) so that virtually pure carbon dioxide (8) is obtained after separation of the condensed water (5 d). In addition, the temperature of the combustion gas and the waste gas (5) is lowered by the recycled amount, this being of non-impairing effect on the gas turbine (1). The carbon dioxide (8) can be compressed and injected into a storage site. The recycled amount is metered by controlling the mixing valve (4) on the basis of the measurement of the temperature of the waste gas (5) with the aid of a sensor (10) and is controlled by a computer (10 a). -
- 1 Gas turbine
- 2 Carbonaceous fuel gas
- 3 Combustion air
- 3 a Air for the air separation unit
- 4 Mixing valve
- 5 Waste gas
- 5 a First part-stream of the waste gas
- 5 b Second part-stream of the waste gas
- 5 c Cooler or condenser
- 5 d Condensed water
- 6 Waste heat boiler or heat exchanger
- 6 a Water
- 6 b Steam
- 7 Gas scrubber
- 8 Carbon dioxide (CO2)
- 9 Regeneration unit
- 10 Temperature sensor
- 10 a Computer
- 11 Oxygenous gaseous oxidising agent
- 11 a Air separation unit
- 11 b Residual air constituents
Claims (11)
1. A process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine, in which a fuel gas suitable for combustion with an oxygenous gas is burnt in a gas turbine so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated, wherein a part-stream of the cooled waste gas is metered to the combustion air of the gas turbine after having left the waste heat boiler, this stream being fed to the gas turbine for combustion, and another part-stream of the cooled waste gas is fed to a gas scrubber for the absorption of acid gases after having left the waste heat boiler, with carbon dioxide CO2 being recovered from the said gas scrubber.
2. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine, in which a fuel gas suitable for combustion with an oxygenous gas is burnt with an oxygen-enriched gas in a gas turbine so that mechanical energy is generated and the waste gas evaporates water in a waste heat boiler by indirect heat exchange so that hot steam is generated, wherein a part-stream of the cooled waste gas is metered to the combustion air of the gas turbine after having left the waste heat boiler, and the other part-stream is cooled in a cooler so that water condenses and carbon dioxide is recovered.
3. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 2 , wherein the other part-stream of the cooled waste gas is fed to a gas scrubber for the absorption of acid gases after having left the waste heat boiler, with carbon dioxide being recovered from the said gas scrubber.
4. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 2 , wherein the oxygen-enriched gas is pure oxygen and the other part-stream is cooled so that water condenses and carbon dioxide is recovered.
5. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 1 , wherein the fuel gas is synthesis gas.
6. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 5 , wherein the synthesis gas originates from a coal gasification reaction in which a finely ground carbonaceous fuel gas is gasified with an oxygenous gas in an entrained flow reaction.
7. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 1 , wherein the fuel gas is natural gas.
8. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 1 , wherein the fuel gas is a refinery gas.
9. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 1 , wherein the fuel gas is biogas.
10. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 1 , wherein the carbon dioxide obtained is compressed and injected into a carbon dioxide storage site.
11. The process for the metered recycling of cooled waste gas from the waste heat boiler of a gas turbine according to claim 1 , wherein the portion of the recycled gas stream from the waste heat boiler and the amount of the part-stream metered into the gas turbine are controlled by the values measured for the temperature of the waste gas from the gas turbine.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011110213A DE102011110213A1 (en) | 2011-08-16 | 2011-08-16 | Method and device for recirculating exhaust gas from a gas turbine with subsequent waste heat boiler |
DE102011110213.6 | 2011-08-16 | ||
PCT/EP2012/002911 WO2013023725A1 (en) | 2011-08-16 | 2012-07-11 | Method and device for feeding back exhaust gas from a gas turbine with a downstream waste heat boiler |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140305131A1 true US20140305131A1 (en) | 2014-10-16 |
Family
ID=46551483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/238,929 Abandoned US20140305131A1 (en) | 2011-08-16 | 2012-07-11 | Method and device for feeding back exhaust gas from a gas turbine with a downstream waste heat boiler |
Country Status (8)
Country | Link |
---|---|
US (1) | US20140305131A1 (en) |
EP (1) | EP2744992A1 (en) |
JP (1) | JP2014521882A (en) |
KR (1) | KR20140068975A (en) |
BR (1) | BR112014003569A2 (en) |
CA (1) | CA2845296A1 (en) |
DE (1) | DE102011110213A1 (en) |
WO (1) | WO2013023725A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017108252A1 (en) * | 2015-12-21 | 2017-06-29 | Siemens Aktiengesellschaft | Gas turbine installation and method for operating a gas turbine installation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020045789A (en) * | 2018-09-18 | 2020-03-26 | アプガン インコーポレイテッド | Gas turbine blower/pump |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653810A (en) * | 1966-12-16 | 1972-04-04 | Metallgesellschaft Ag | Process for a fine purification of hydrogen-containing gases |
US3785145A (en) * | 1971-11-10 | 1974-01-15 | Gen Motors Corp | Gas turbine power plant |
US4942734A (en) * | 1989-03-20 | 1990-07-24 | Kryos Energy Inc. | Cogeneration of electricity and liquid carbon dioxide by combustion of methane-rich gas |
US20070006592A1 (en) * | 2005-07-08 | 2007-01-11 | Chellappa Balan | Systems and methods for power generation with carbon dioxide isolation |
US20080098654A1 (en) * | 2006-10-25 | 2008-05-01 | Battelle Energy Alliance, Llc | Synthetic fuel production methods and apparatuses |
US20080104938A1 (en) * | 2006-11-07 | 2008-05-08 | General Electric Company | Systems and methods for power generation with carbon dioxide isolation |
US20080309087A1 (en) * | 2007-06-13 | 2008-12-18 | General Electric Company | Systems and methods for power generation with exhaust gas recirculation |
US20090145127A1 (en) * | 2007-12-06 | 2009-06-11 | Michael Vollmer | Combined-cycle power plant with exhaust gas recycling and co2 separation, and method for operating a combined cycle power plant |
US20100092359A1 (en) * | 2006-12-15 | 2010-04-15 | Svendsen Hallvard F | Method for capturing co2 from exhaust gas |
WO2010072710A2 (en) * | 2008-12-24 | 2010-07-01 | Alstom Technology Ltd | Power plant with co2 capture |
US20100180565A1 (en) * | 2009-01-16 | 2010-07-22 | General Electric Company | Methods for increasing carbon dioxide content in gas turbine exhaust and systems for achieving the same |
US20100326276A1 (en) * | 2009-06-30 | 2010-12-30 | Blair Alan M | Acid gas scrubbing composition |
US20110107916A1 (en) * | 2008-07-23 | 2011-05-12 | Mitsubishi Heavy Industries, Ltd. | System for recovering carbon dioxide from flue gas |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3924908A1 (en) * | 1989-07-27 | 1991-01-31 | Siemens Ag | Freezing dried carbon di:oxide from fossil fuel combustion - for sinking as dry ice into deep sea to counter greenhouse effect |
JP2954972B2 (en) | 1990-04-18 | 1999-09-27 | 三菱重工業株式会社 | Gasification gas combustion gas turbine power plant |
JPH04116232A (en) | 1990-09-07 | 1992-04-16 | Babcock Hitachi Kk | Coal gasification compound power generation method |
DE4335136C2 (en) * | 1992-10-22 | 1999-12-16 | Alstom Energy Syst Gmbh | Method and device for carrying out the method for generating gases for operating a gas turbine in a combined gas and steam power plant |
ES2078078T3 (en) | 1993-03-16 | 1995-12-01 | Krupp Koppers Gmbh | PROCEDURE FOR GASIFICATION UNDER THE PRESSURE OF FINALLY DIVIDED FUELS. |
EP0648919B1 (en) * | 1993-10-15 | 1998-12-23 | ALSTOM Energy Systems GmbH | Process and system for the production of gas for operating a gas turbine in a combined power plant |
JPH09250359A (en) * | 1996-03-14 | 1997-09-22 | Kikai Kagaku Kenkyusho:Kk | Power generating method |
DE19753903C2 (en) | 1997-12-05 | 2002-04-25 | Krupp Uhde Gmbh | Process for the removal of CO¶2¶ and sulfur compounds from technical gases, in particular from natural gas and raw synthesis gas |
NO990812L (en) * | 1999-02-19 | 2000-08-21 | Norsk Hydro As | Method for removing and recovering CO2 from exhaust gas |
US20030037928A1 (en) | 2001-05-16 | 2003-02-27 | Ramakrishnan Ramachandran | Enhanced oil recovery |
EP1429000A1 (en) * | 2002-12-09 | 2004-06-16 | Siemens Aktiengesellschaft | Method and device for operating a gas turbine comprising a fossile fuel combustion chamber |
JP4274846B2 (en) * | 2003-04-30 | 2009-06-10 | 三菱重工業株式会社 | Carbon dioxide recovery method and system |
DE102005015151A1 (en) * | 2005-03-31 | 2006-10-26 | Alstom Technology Ltd. | Gas turbine system for power station, has control device to control volume flow and/or temperature of combustion exhaust gas, such that fresh gas-exhaust gas-mixture entering into compressor of turbo group has preset reference temperature |
WO2007092084A2 (en) * | 2005-12-21 | 2007-08-16 | Callahan Richard A | Integrated gasification combined cycle synthesis gas membrane process |
AT504863B1 (en) * | 2007-01-15 | 2012-07-15 | Siemens Vai Metals Tech Gmbh | METHOD AND APPARATUS FOR GENERATING ELECTRICAL ENERGY IN A GAS AND STEAM TURBINE (GUD) POWER PLANT |
US9404418B2 (en) * | 2007-09-28 | 2016-08-02 | General Electric Company | Low emission turbine system and method |
US7861511B2 (en) * | 2007-10-30 | 2011-01-04 | General Electric Company | System for recirculating the exhaust of a turbomachine |
US20090151318A1 (en) * | 2007-12-13 | 2009-06-18 | Alstom Technology Ltd | System and method for regenerating an absorbent solution |
EP2246532A1 (en) * | 2008-12-24 | 2010-11-03 | Alstom Technology Ltd | Power plant with CO2 capture |
EP2305364A1 (en) * | 2009-09-29 | 2011-04-06 | Alstom Technology Ltd | Power plant for CO2 capture |
-
2011
- 2011-08-16 DE DE102011110213A patent/DE102011110213A1/en not_active Ceased
-
2012
- 2012-07-11 WO PCT/EP2012/002911 patent/WO2013023725A1/en active Application Filing
- 2012-07-11 US US14/238,929 patent/US20140305131A1/en not_active Abandoned
- 2012-07-11 BR BR112014003569A patent/BR112014003569A2/en not_active IP Right Cessation
- 2012-07-11 EP EP12738035.0A patent/EP2744992A1/en not_active Withdrawn
- 2012-07-11 JP JP2014525334A patent/JP2014521882A/en active Pending
- 2012-07-11 KR KR1020147006929A patent/KR20140068975A/en not_active Application Discontinuation
- 2012-07-11 CA CA2845296A patent/CA2845296A1/en not_active Abandoned
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653810A (en) * | 1966-12-16 | 1972-04-04 | Metallgesellschaft Ag | Process for a fine purification of hydrogen-containing gases |
US3785145A (en) * | 1971-11-10 | 1974-01-15 | Gen Motors Corp | Gas turbine power plant |
US4942734A (en) * | 1989-03-20 | 1990-07-24 | Kryos Energy Inc. | Cogeneration of electricity and liquid carbon dioxide by combustion of methane-rich gas |
US20070006592A1 (en) * | 2005-07-08 | 2007-01-11 | Chellappa Balan | Systems and methods for power generation with carbon dioxide isolation |
US20080098654A1 (en) * | 2006-10-25 | 2008-05-01 | Battelle Energy Alliance, Llc | Synthetic fuel production methods and apparatuses |
US20080104938A1 (en) * | 2006-11-07 | 2008-05-08 | General Electric Company | Systems and methods for power generation with carbon dioxide isolation |
US20100092359A1 (en) * | 2006-12-15 | 2010-04-15 | Svendsen Hallvard F | Method for capturing co2 from exhaust gas |
US20080309087A1 (en) * | 2007-06-13 | 2008-12-18 | General Electric Company | Systems and methods for power generation with exhaust gas recirculation |
US20090145127A1 (en) * | 2007-12-06 | 2009-06-11 | Michael Vollmer | Combined-cycle power plant with exhaust gas recycling and co2 separation, and method for operating a combined cycle power plant |
US20110107916A1 (en) * | 2008-07-23 | 2011-05-12 | Mitsubishi Heavy Industries, Ltd. | System for recovering carbon dioxide from flue gas |
WO2010072710A2 (en) * | 2008-12-24 | 2010-07-01 | Alstom Technology Ltd | Power plant with co2 capture |
US20100180565A1 (en) * | 2009-01-16 | 2010-07-22 | General Electric Company | Methods for increasing carbon dioxide content in gas turbine exhaust and systems for achieving the same |
US20100326276A1 (en) * | 2009-06-30 | 2010-12-30 | Blair Alan M | Acid gas scrubbing composition |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017108252A1 (en) * | 2015-12-21 | 2017-06-29 | Siemens Aktiengesellschaft | Gas turbine installation and method for operating a gas turbine installation |
Also Published As
Publication number | Publication date |
---|---|
BR112014003569A2 (en) | 2017-03-07 |
EP2744992A1 (en) | 2014-06-25 |
KR20140068975A (en) | 2014-06-09 |
DE102011110213A1 (en) | 2013-02-21 |
JP2014521882A (en) | 2014-08-28 |
CA2845296A1 (en) | 2013-02-21 |
WO2013023725A1 (en) | 2013-02-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5913304B2 (en) | Low emission triple cycle power generation system and method | |
JP5906555B2 (en) | Stoichiometric combustion of rich air by exhaust gas recirculation system | |
US8696797B2 (en) | Carbon dioxide removal from synthesis gas at elevated pressure | |
US7669403B2 (en) | Power plant and operating method | |
JP2014515800A (en) | Carbon dioxide capture system and method in a low emission turbine system | |
JP2007254270A (en) | Method of treating gaseous mixture comprising hydrogen and carbon dioxide | |
US8475545B2 (en) | Methods and apparatus for use in cooling an injector tip | |
RU2553289C2 (en) | Method and system to produce energy source under thermodynamic cycle by co2 conversion from feed stock containing carbon | |
GB2457950A (en) | Improved process for the capture and disposal of carbon dioxide | |
ES2478877T3 (en) | Procedure to operate an IGCC power plant process with integrated CO2 separation | |
US20140305131A1 (en) | Method and device for feeding back exhaust gas from a gas turbine with a downstream waste heat boiler | |
Prins et al. | Technological developments in IGCC for carbon capture | |
US20100044643A1 (en) | Low NOx Gasification Startup System | |
FR2907025A1 (en) | CO2 CAPTURE PROCESS WITH THERMAL INTEGRATION OF REGENERATOR. | |
JP7466412B2 (en) | Cement manufacturing method and cement manufacturing system | |
US11434142B2 (en) | Sodium bicarbonate production | |
AU2011201679B2 (en) | System for gas purification and recovery with multiple solvents | |
US8377198B2 (en) | Gasification with separate calcination | |
ES2319026B1 (en) | GLYCERINE GASIFICATION PROCEDURE. | |
ES2897549T3 (en) | A urea manufacturing process and manufacturing plant using CO2 produced by oxy-combustion | |
WO2021037700A1 (en) | Method and a direct reduction plant for producing direct reduced iron | |
JP2005325322A (en) | Energy recovery method of reducing gasified wood biomass | |
KR101695497B1 (en) | Method for improving efficiency of oxy fuel combustion power generation system | |
Ditaranto et al. | CAPEWASTE Project: Enabling Carbon Capture with Oxy-Fuel Combustion Technology for the Waste-To-Energy Sector | |
Plants | Fifth Annual Conference on Carbon Capture & Sequestration |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: THYSSENKRUPP INDUSTRIAL SOLUTIONS GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:THIELERT, HOLGER;VON MORSTEIN, OLAF;SCHOENEBERGER, JAN;SIGNING DATES FROM 20140225 TO 20140305;REEL/FRAME:032914/0726 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |