CA2845296A1 - Process and contrivance for the recycling of waste gas from a gas turbine with downstream waste heat boiler - Google Patents
Process and contrivance for the recycling of waste gas from a gas turbine with downstream waste heat boiler Download PDFInfo
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- CA2845296A1 CA2845296A1 CA2845296A CA2845296A CA2845296A1 CA 2845296 A1 CA2845296 A1 CA 2845296A1 CA 2845296 A CA2845296 A CA 2845296A CA 2845296 A CA2845296 A CA 2845296A CA 2845296 A1 CA2845296 A1 CA 2845296A1
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- Prior art keywords
- gas
- waste
- gas turbine
- metered
- waste heat
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- 239000007789 gas Substances 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002918 waste heat Substances 0.000 title claims abstract description 44
- 230000008569 process Effects 0.000 title claims abstract description 39
- 239000002912 waste gas Substances 0.000 title claims description 85
- 238000004064 recycling Methods 0.000 title claims description 19
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 171
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 83
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 79
- 238000002485 combustion reaction Methods 0.000 claims abstract description 51
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 239000002737 fuel gas Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 14
- 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
- 239000000567 combustion gas Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000005406 washing Methods 0.000 abstract 1
- 229960004424 carbon dioxide Drugs 0.000 description 55
- 238000005201 scrubbing Methods 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000002156 mixing Methods 0.000 description 7
- 239000007800 oxidant agent Substances 0.000 description 7
- 239000000470 constituent Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 229960005419 nitrogen Drugs 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
- 238000011084 recovery Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 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
- 229940099349 liquefied petroleum gas Drugs 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
- 238000011282 treatment Methods 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
- 239000003795 chemical substances by application 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
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 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
- 229960003903 oxygen Drugs 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
Classifications
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- 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
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
The invention relates to 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. As a result of the metered feeding back of the exhaust gas, the temperature in the gas turbine can be lowered and the proportion of carbon dioxide in the exhaust gas can be considerably increased, with the result that after combustion has taken place and heat has been exchanged gas washing is possible and, on the one hand, the carbon dioxide can be recovered and, on the other hand, the proportion of free oxygen in the exhaust gas can be lowered. In a further embodiment of the invention, a gas which is enriched with oxygen is fed with a combustion gas into a gas turbine for combustion, and this is then diluted with exhaust gas with the result that the temperature can be kept low despite the oxygen enrichment, and after combustion and exchange of heat highly concentrated carbon dioxide is obtained.
Description
PROCESS AND CONTRIVANCE FOR THE RECYCLING OF WASTE GAS FROM A GAS
TURBINE WITH DOWNSTREAM WASTE HEAT BOILER
[0001] The invention relates to a process for the recycling of waste gas from a gas tur-bine 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 (002) is obtained which can be injected into a storage site so that the carbon dioxide balance for the entire pro-cess 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 combus-tion 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.
TURBINE WITH DOWNSTREAM WASTE HEAT BOILER
[0001] The invention relates to a process for the recycling of waste gas from a gas tur-bine 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 (002) is obtained which can be injected into a storage site so that the carbon dioxide balance for the entire pro-cess 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 combus-tion 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.
[0002] 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 me-chanical 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 gener-ation are of high efficiency.
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 me-chanical 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 gener-ation are of high efficiency.
[0003] As a fuel gas for such processes all gases that are suitable for driving gas tur-bines can be used, which are ultimately gases which can be fed to the gas chamber of a tur-bine 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 (Lique-fied 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 fine-ly ground carbonaceous fuel is gasified with an oxygenous gas in an entrained flow gasifica-tion. The synthesis gas thus produced can be used for driving gas turbines by means of com-bustion. To ensure the usability of the fuel gas in a gas turbine, gas scrubbing is normally car-ried 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.
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 (Lique-fied 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 fine-ly ground carbonaceous fuel is gasified with an oxygenous gas in an entrained flow gasifica-tion. The synthesis gas thus produced can be used for driving gas turbines by means of com-bustion. To ensure the usability of the fuel gas in a gas turbine, gas scrubbing is normally car-ried 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.
[0004] 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 diox-ide (CO2) and water (H20) form so that - except for these gases - the gas will only contain ni-trogen (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.
If pure oxygen is used for combustion, the waste gas virtually only contains carbon dioxide and water.
[0005] 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.
[0006] 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 pro-cess for the re-injection of compressed carbon dioxide into a storage site is given in EP1 258595A2.
[0007] 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 com-pression 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 possi-ble.
[0008] 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 absorb-ing solvents. Many absorbing solvents used for the removal of carbon dioxide by gas scrub-bing 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.
[0009] It is therefore of advantage if a process for operating a gas turbine with down-stream heat recovery system produces a waste gas which has a high carbon dioxide content and a very low oxygen content (02) right from the beginning. In addition, the content of nitro-gen 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.
[0010] 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 vol-ume at a low level.
[0011] 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 re-covery of thermal energy and gas scrubbing are carried out, carbon dioxide (CO2) being ob-tained. This method, to a certain extent, represents a peripheral area, the other peripheral ar-ea 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.
[0012] 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 per-formed 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 tur-bine 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 impair-ment to gas scrubbing.
is [0013] 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.
[0014] 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.
[0015] 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 ex-change 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.
5 [0016] 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.
[0017] The oxygen-enriched gas is preferably taken from an air separation unit. Howev-er, 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 af-ter 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 neverthe-less 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 gas-es 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.
[0018] 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 com-pressed 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.
[0019] 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.
= CA 02845296 2014-02-13 [0020] 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 em-bodiment of a coal gasification reaction for the recovery of synthesis gas is given in EP061602261.
[0021] However, the fuel gas can also be natural gas. Prior to combustion in a gas tur-bine, 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.
[0022] In another embodiment of the invention the fuel gas is a refinery gas. The treat-ment 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 hydro-gen. 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.
[0023] 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.
[0024] 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.
[0025] 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 enter-ing 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 = CA 02845296 2014-02-13 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 (02). Controlling is carried out either manually or by computer. Claim is also laid to a contrivance for running the process embodying the inven-tion, provided there is a corresponding interconnection of plant sections.
[0026] 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.
[0027] 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 pro-cess 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 oxy-gen-enriched oxidising agent.
[0028] The invention is explained by means of two drawings showing exemplary embod-iments only and not being restricted to the latter.
[0029] 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 tur-bine, 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.
[0030] FIG.1 shows a gas turbine (1) heated with a carbonaceous fuel gas (2) and com-bustion air (3), the combustion air (3) being added via a mixing valve (4) and mechanical en-ergy 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 (6a) supplied and as a result steam (6b) is generat-ed. A part-stream of the waste gas (5a) 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 (5b) 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 (7a) 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 (5a) 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 (10a).
[0031] FIG.2 also shows a gas turbine (1) heated with a carbonaceous fuel gas (2) and pure oxygen (11) from an air separation unit (11a) which separates the exhaust air (3a) into oxygen (11) and the residual air constituents (11b), with pure oxygen (11) being added as ox-idising agent via a mixing valve (4) and mechanical energy being generated by the combus-tion 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 (6a) supplied and as a result steam (6b) is generated. A part-stream of the waste gas (5a) 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 (H20) and carbon dioxide (CO2).
The second part-stream (5b) of the cooled waste gas is further cooled for condensation (5c) so that virtually pure carbon dioxide (8) is obtained after separation of the condensed water (5d). 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 di-oxide (8) can be compressed and injected into a storage site. The recycled amount is me-tered 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 (10a).
[0032] List of reference numbers and designations 1 Gas turbine 2 Carbonaceous fuel gas 3 Combustion air 3a Air for the air separation unit 4 Mixing valve Waste gas 5a First part-stream of the waste gas 5b Second part-stream of the waste gas 5c Cooler or condenser 5d Condensed water 6 Waste heat boiler or heat exchanger 6a Water 6b Steam 7 Gas scrubber 8 Carbon dioxide (CO2) 9 Regeneration unit Temperature sensor 10a Computer 11 Oxygenous gaseous oxidising agent lla Air separation unit llb Residual air constituents
is [0013] 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.
[0014] 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.
[0015] 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 ex-change 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.
5 [0016] 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.
[0017] The oxygen-enriched gas is preferably taken from an air separation unit. Howev-er, 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 af-ter 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 neverthe-less 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 gas-es 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.
[0018] 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 com-pressed 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.
[0019] 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.
= CA 02845296 2014-02-13 [0020] 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 em-bodiment of a coal gasification reaction for the recovery of synthesis gas is given in EP061602261.
[0021] However, the fuel gas can also be natural gas. Prior to combustion in a gas tur-bine, 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.
[0022] In another embodiment of the invention the fuel gas is a refinery gas. The treat-ment 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 hydro-gen. 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.
[0023] 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.
[0024] 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.
[0025] 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 enter-ing 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 = CA 02845296 2014-02-13 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 (02). Controlling is carried out either manually or by computer. Claim is also laid to a contrivance for running the process embodying the inven-tion, provided there is a corresponding interconnection of plant sections.
[0026] 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.
[0027] 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 pro-cess 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 oxy-gen-enriched oxidising agent.
[0028] The invention is explained by means of two drawings showing exemplary embod-iments only and not being restricted to the latter.
[0029] 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 tur-bine, 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.
[0030] FIG.1 shows a gas turbine (1) heated with a carbonaceous fuel gas (2) and com-bustion air (3), the combustion air (3) being added via a mixing valve (4) and mechanical en-ergy 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 (6a) supplied and as a result steam (6b) is generat-ed. A part-stream of the waste gas (5a) 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 (5b) 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 (7a) 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 (5a) 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 (10a).
[0031] FIG.2 also shows a gas turbine (1) heated with a carbonaceous fuel gas (2) and pure oxygen (11) from an air separation unit (11a) which separates the exhaust air (3a) into oxygen (11) and the residual air constituents (11b), with pure oxygen (11) being added as ox-idising agent via a mixing valve (4) and mechanical energy being generated by the combus-tion 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 (6a) supplied and as a result steam (6b) is generated. A part-stream of the waste gas (5a) 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 (H20) and carbon dioxide (CO2).
The second part-stream (5b) of the cooled waste gas is further cooled for condensation (5c) so that virtually pure carbon dioxide (8) is obtained after separation of the condensed water (5d). 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 di-oxide (8) can be compressed and injected into a storage site. The recycled amount is me-tered 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 (10a).
[0032] List of reference numbers and designations 1 Gas turbine 2 Carbonaceous fuel gas 3 Combustion air 3a Air for the air separation unit 4 Mixing valve Waste gas 5a First part-stream of the waste gas 5b Second part-stream of the waste gas 5c Cooler or condenser 5d Condensed water 6 Waste heat boiler or heat exchanger 6a Water 6b Steam 7 Gas scrubber 8 Carbon dioxide (CO2) 9 Regeneration unit Temperature sensor 10a Computer 11 Oxygenous gaseous oxidising agent lla Air separation unit llb Residual air constituents
Claims (11)
1. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1), in which a fuel gas (2) suitable for combustion with an ox-ygenous gas (3,11) is burnt in a gas turbine (1) so that mechanical energy is gener-ated and the waste gas (5) evaporates water (6a) in a waste heat boiler (6) by indi-rect heat exchange so that hot steam (6b) is generated, characterised in that a part-stream (5a) of the cooled waste gas (5) is metered to the combustion air of the gas turbine (1) after having left the waste heat boiler (6), this stream being fed to the gas turbine (1) for combustion, and another part-stream (5b) of the cooled waste gas is fed to a gas scrubber (7) for the absorption of acid gases after having left the waste heat boiler (6), with carbon dioxide (8, CO2) being recovered from the said gas scrubber.
2. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1), in which a fuel gas (2) suitable for combustion with an ox-ygenous gas (3,11) is burnt with an oxygen-enriched gas (11) in a gas turbine (1) so that mechanical energy is generated and the waste gas (5) evaporates water (6a) in a waste heat boiler (6) by indirect heat exchange so that hot steam (6b) is generat-ed, characterised in that a part-stream (5a) of the cooled waste gas is metered to the combustion air (11) of the gas turbine (1) after having left the waste heat boiler (6), and the other part-stream (5b) is cooled in a cooler (5c) so that water (5d) con-denses and carbon dioxide (8, CO2) is recovered.
3. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to claim 2, characterised in that the other part-stream (5b) of the cooled waste gas is fed to a gas scrubber (7) for the absorption of acid gases after having left the waste heat boiler (6), with carbon dioxide (8, CO2) being recovered from the said gas scrubber.
4. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to claim 2, characterised in that the oxygen-enriched gas (11) is pure oxygen and the other part-stream (5b) is cooled so that wa-ter (5d) condenses and carbon dioxide (8,CO2) is recovered.
5. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to one of claims 1 to 4, characterised in that the fuel gas (2) is synthesis gas.
6. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to claim 5, characterised in that the synthesis gas (2) originates from a coal gasification reaction in which a finely ground carbona-ceous fuel gas is gasified with an oxygenous gas in an entrained flow reaction.
7. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to one of claims 1 to 4, characterised in that the fuel gas (2) is natural gas.
8. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to one of claims 1 to 4, characterised in that the fuel gas (2) is a refinery gas.
9. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to one of claims 1 to 4, characterised in that the fuel gas (2) is biogas.
10. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to one of claims 1 to 9, characterised in that the carbon dioxide obtained (8) is compressed and injected into a carbon dioxide storage site.
11. Process for the metered recycling of cooled waste gas (5a) from the waste heat boil-er (6) of a gas turbine (1) according to one of claims 1 to 10, characterised in that the portion of the recycled gas stream (5a) from the waste heat boiler (6) and the amount of the part-stream metered into the gas turbine (1) are controlled by the val-ues (10) measured for the temperature of the waste gas (5) from the gas turbine (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011110213.6 | 2011-08-16 | ||
| 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 |
| 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 |
|---|---|
| CA2845296A1 true CA2845296A1 (en) | 2013-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA2845296A Abandoned CA2845296A1 (en) | 2011-08-16 | 2012-07-11 | Process and contrivance for the recycling of waste gas from a gas turbine with 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) |
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| DE102015226305A1 (en) * | 2015-12-21 | 2017-06-22 | Siemens Aktiengesellschaft | Gas turbine plant and method for operating a gas turbine plant |
| 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 |
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| JP5495520B2 (en) * | 2008-07-23 | 2014-05-21 | 三菱重工業株式会社 | Carbon dioxide recovery device in exhaust gas |
| EP2246532A1 (en) * | 2008-12-24 | 2010-11-03 | Alstom Technology Ltd | Power plant with CO2 capture |
| EP2248999A1 (en) * | 2008-12-24 | 2010-11-10 | 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 |
| US8461335B2 (en) * | 2009-06-30 | 2013-06-11 | Nalco Company | Acid gas scrubbing composition |
| 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 JP JP2014525334A patent/JP2014521882A/en active Pending
- 2012-07-11 US US14/238,929 patent/US20140305131A1/en not_active Abandoned
- 2012-07-11 EP EP12738035.0A patent/EP2744992A1/en not_active Withdrawn
- 2012-07-11 CA CA2845296A patent/CA2845296A1/en not_active Abandoned
- 2012-07-11 KR KR1020147006929A patent/KR20140068975A/en not_active Application Discontinuation
- 2012-07-11 WO PCT/EP2012/002911 patent/WO2013023725A1/en active Application Filing
- 2012-07-11 BR BR112014003569A patent/BR112014003569A2/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013023725A1 (en) | 2013-02-21 |
| US20140305131A1 (en) | 2014-10-16 |
| EP2744992A1 (en) | 2014-06-25 |
| KR20140068975A (en) | 2014-06-09 |
| DE102011110213A1 (en) | 2013-02-21 |
| BR112014003569A2 (en) | 2017-03-07 |
| JP2014521882A (en) | 2014-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20160713 |