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GB2067668A - Control of NOx emissions in a stationary gas turbine - Google Patents

Control of NOx emissions in a stationary gas turbine Download PDF

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Publication number
GB2067668A
GB2067668A GB8039427A GB8039427A GB2067668A GB 2067668 A GB2067668 A GB 2067668A GB 8039427 A GB8039427 A GB 8039427A GB 8039427 A GB8039427 A GB 8039427A GB 2067668 A GB2067668 A GB 2067668A
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United Kingdom
Prior art keywords
oxygen
air
combustor
gas turbine
deficient
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.)
Withdrawn
Application number
GB8039427A
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General Electric Co
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General Electric Co
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB2067668A publication Critical patent/GB2067668A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04539—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the H2/CO synthesis by partial oxidation or oxygen consuming reforming processes of fuels
    • F25J3/04545—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the H2/CO synthesis by partial oxidation or oxygen consuming reforming processes of fuels for the gasification of solid or heavy liquid fuels, e.g. integrated gasification combined cycle [IGCC]
    • 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
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/26—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension
    • F02C3/28—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension using a separate gas producer for gasifying the fuel before combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04563—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating
    • F25J3/04575—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating for a gas expansion plant, e.g. dilution of the combustion gas in a gas turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04593—The air gas consuming unit is also fed by an air stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/40—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/42—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/80—Hot exhaust gas turbine combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/10—Mathematical formulae, modeling, plot or curves; Design methods
    • 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]

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)

Abstract

The NOx emissions of a stationary gas turbine used in conjunction with an oxygen blown coal gasification plant 2 is reduced by substituting a part of the air supply to the combustor 4 of the gas turbine 5 with an oxygen-deficient air mixture which is preferably a by-product of the oxygen separation from air of the coal gasification plant. <IMAGE>

Description

SPECIFICATION Control of NOx emissions in a stationary gas turbine The abatement of emissions, particularly the oxides of nitrogen (NOx), is gaining increasing attention and significant resources are being applied to the associated problems.
Investigation of the NOx forming mechanisms in the combustors of stationary gas turbines has shown there are basicaliy two different NOx sources. Thermal NOx is formed by reactions between the nitrogen and oxygen in the air initiated by the high flame temperature. Fuel NOx, on the other hand, results from the oxidation of organic nitrogen compounds in the fuel. In liquid fuel, the fuel nitrogen may be present in the form of any nitrogen bearing hydrogen compounds of which pyridine is one example. In gaseous fuel, the fuel nitrogen may be present in the form of ammonia or some other nitrogen compound.
Various governmental agencies have proposed or enacted codes for regulating the NOx emissions of stationary gas turbines. For example, the United States Environmental Protection Agency has proposed a code limiting NOx emissions to 75 ppm at 15% oxygen with an efficiency correction. In Southern California, the Los Angeles County Air Pollution Control District's Los Angeles County Rule No. 67 limits NOx emissions to 140 Ib per hour. Currently available stationary gas turbines cannot satisfy such code requirements without water or steam injection but such a procedure is undesirable because the water and steam injection has a deleterious effect on heat rate and also it is difficult to supply an- adequate amount of water of sufficient purity to prevent damage to the turbine.Factors which effect the level of NOx emissions in stationary gas turbines and other turbines are known and various attempts to modify the structure of reactance combusted have been attempted. See, e.g., U.S.
Patents 3,969,892, 3,949,548 and 3,792,581.
Such attempts have met with various levels of success.
Stationary gas turbines can be used in conjunction with a fuel prepared in a coal gasification plant. The gasification plant is basically made up of two units. The first is an air separation unit in which oxygen is separated from the remainder of the air and the second is an oxygen blown coal gas production unit in which the separated oxygen and coal are processed to provide a fuel which has a medium BTU heating value of about 180 to 300 BTUs per cubic foot.
The peak flame temperature reached in the combustor for the gas turbine is nearly the same for the medium BTU fuel gas as it is for distillate oils. As a result, nitrogen in the combustion air reacts to form NOx in the high temperature flame zone and the same thermal NOx formation problems encountered when using a distillate oii fuel are present. Water or steam injection as a means of decreasing thermal NOx formation is not a viable alternative with coal gas fuels because in addition to the thermal efficiency penalty, the injection of such fluids can induce compressor surges.In general, the fuel to air ratio is higher with coal gas fuels than with oil or natural gas so that the initial mass injection (the water or steam) increases the back pressure to near the compressor surge line which would require redesign of either the compressor or other equipment to be overcome. Additionally, gaseous nitrogen is produced as a by-product of the oxygen separation from the air and must be disposed of in a suitable fashion.
It is the object of this invention to provide a method and apparatus for lowering the NOx emissions of a stationary gas turbine especially when the fuel for the combustor of the gas turbine is a medium BTU fuel gas generated in a coal gasification plant. This and other objects of the invention will become apparent to those skilled in the art from the following detailed description in which Figure 1 is a schematic flow diagram of a first embodiment of the present invention; Figure 2 is a schematic flow diagram of a second embodiment of the present invention; Figure 3 is a schematic flow diagram of a third embodiment of the present invention; Figure 4 is a graph of data relating the amount of oxygen to NOx emissions; and Figure 5 is a graph of data relating the amount of oxygen to the percent NOx emissions reduction.
This invention relates to a method and plant for reducing NOx emissions from a stationary gas turbine and more particularly relates to the use of an oxygen-deficient air mixture as a substitute for a portion of the combustion air, particularly in a plant where the fuel is a medium BTU fuel gas produced by the gasification of coal and the oxygen-deficient air mixture is a by-product of the oxygen separation which forms a part of the gasification unit.
Medium BTU coal gas fuels are generated in oxygen blown gasifiers and used in combined cycle gas turbines for power generation. The oxygen is generated on site by separating air and the remaining oxygen-deficient air mixture consisting essentially of nitrogen, argon and a small percentage of oxygen is vented to the atmosphere. The present invention advantageously utilizes the normally wasted oxygen-deficient air mixture in order to control NOx emissions from the gas turbines. By way of example, a typical oxygen-deficient air mixture derived from an air separator consists essentially of nitrogen, less than ten percent oxygen and less than two percent argon and other air constituents.
Hence, the oxygen-deficient air mixture consists of approximately ninety percent nitrogen, N2.
Accordingly, as used herein, the term oxygendeficient air mixture consists essentially of nitrogen.
While the Figures 1-3 are schematic flow diagram of three embodiments of the present invention, a conventional oxygen blown coal gasification-gas turbine electric generating plant can be described with reference to such drawings.
Airfrom any suitable source is introduced into an air separation unit 1 where the oxygen for the coal gasifier is separated and the oxygen-deficient air mixture, indicated generally by the symbol N2 is vented to the atmosphere. The oxygen thus separated is then used together with coal in a gas production unit 2 to generate the medium BTU fuel gas. Air from the same or a different source is introduced into a compressor 3 and the resulting compressed air, together with the medium BTU fuel gas is introduced into the stationary gas turbine combustor 4. The combustion products are then used in gas turbine 5 to generate power.
In accordance with the present invention, the waste oxygen-deficient air mixture from the air separation unit 1 is introduced into the inlet of compressor 3 of gas turbine 5. This is accomplished by interjecting a control valve 6 or other suitable control device in the exhaust line connecting the air separation unit 1 to the atmospheric vent. Control valve 6 is operated so as to divert a portion of the oxygen-deficient air mixture to the inlet of compressor 3.
The embodiments shown in Figures 2 and 3 additionally are adapted to concentrate the oxygen-deficient air mixture in the flame zone of combustor 4 to make more efficient use of the available oxygen-deficient air mixture for control of the NOx emissions. In the Figure 2 embodiment, a portion of the oxygen-deficient air mixture is diverted from the exhaust line emanating from air separation unit 1 and conveyed to a gaseous compressor 7. The compressed oxygen-deficient air mixture consisting essentially of compressed nitrogen is then introduced into the combustor 4 through the combustor inlet. The Figure 3 embodiment is the same arrangement as the Figure 2 embodiment except that the compressed nitrogen is mixed with the medium BTU fuel gas and the resulting mixture is introduced into combustor 4.
The effect of the various embodiments of the invention is to replace a portion of the normal combustor air flow with the oxygen-deficient air mixture. Even though thermal NOx formation is the result of the combustion of nitrogen in the combustor and the invention increases the quantity of nitrogen in the combustor, the NOx emissions are reduced. The reason for this reduction is that diluting the combustion air with nitrogen decreases the oxygen content of the combustion air which, in turn, lowers the peak combustion temperature and thereby decreases the thermal NOx substantially. The amount of nitrogen utilized depends on the desired degree of NOx reduction. Air is about 21% by volume oxygen. It has been found that the oxygen content can be reduced by nitrogen to about 17% by volume without any substantially adverse effects on the combustion system.It has further been found that within the range of about 1 7 to 20% oxygen, the NOx emissions of the stationary gas turbine are substantially reduced. Accordingly, sufficient nitrogen is introduced into the combustor in order to reduce the oxygen content from about 21% to about 1 7-20% and preferably about 1719%. In other words, about 520% by volume, preferably about 1020% by volume, of the air is replaced with nitrogen.
In order to- demonstrate the present invention, a commercially available gas turbine combustor was operated at a turbine firing temperature of 1 8500F and to duplicate machine conditions, nitrogen was added to the combustor inlet air well upstream of the combustorto ensure a homogeneous mixture and air was vented near the combustor discharge to maintain a constant mass flow through the combustor. Adding nitrogen in this manner does not change mass flow significantly but dilutes the oxygen in the air. The volume percent oxygen in the air was measured at several test points and the results achieved are shown in Figures 4 and 5.Figure 4 relates the amount of oxygen in the combustor air with the measured wet NOx in parts per million and Figure 5 presents the same data as a percent reduction in NOx relative to that measured with air undiluted with nitrogen. The dynamic pressure, pattern factor and CO emissions were also monitored during this test and were found not to change significantly from the base line air data.
Extrapolation of the data presented in Figure 5 to predict the machine NOx emission characteristics over the load range on a worst case basis indicated that the NOx emissions would be below the proposed U.S. Environmental Protection Agency NOx limit for the entire curve.
Those skilled in the art can appreciate that Figures 4 and 5 apply to the situation where the oxygen-deficient air mixture is mixed homogeneously with the compressor air.
However, the plots can be extended to approximate the effects of head end injection and mixing the oxygen-deficient air mixture with the fuel by considering the abscissa as volume percent oxygen in air for the stoichiometric flame zone, assuming all the oxygen-deficient air mixture enters the flame zone.

Claims (11)

1. In the method of operating a stationary gas turbine comprising compressing air in an air compressor, burning fuel with the compressed air in a combustor and employing the combustion product to operate a gas turbine, the improvement which comprises replacing about 520% by volume of the compressed air introduced into said combustor with an oxygen-deficient air mixture.
2. The method of claim 1 in which about 1020% by volume is replaced.
3. The method of claim 1 wherein oxygen is separated from a volume of air and employed in a coal gasification plant to generate a medium BTU coal gas fuel, said medium BTU coal gas fuel is employed as the fuel introduced into said combustor, and wherein a portion of the byproduct oxygen-deficient air mixture of said oxygen separation is compressed with said air into said air compressor.
4. The method of claim 3 wherein an additional portion of the by-product oxygen-deficient air mixture is compressed and the resulting compressed mixture is introduced into said combustor.
5. The method of claim 4 wherein said resulting compressed mixture is mixed with said medium BTU fuel gas and the resultant mixture is introduced into said combustor.
6. An oxygen blown coal gasification-stationary gas turbine power plant comprising: means to separate oxygen from air, means to convert coal and oxygen to a medium BTU coal gas, means to convey oxygen from said means to separate to said means to convert, means to recover a byproduct oxygen-deficient air mixture from said means to separate oxygen from air, venting means connected to said means to recover a by-product oxygen-deficient air mixture, an air compressor, means to convey said by-product oxygen-deficient air mixture to said air compressor from said means to recover by-product oxygen-deficient air mixture, means to control the relative rate of flow of said venting means and said means to convey byproduct oxygen-deficient air mixture to said air compressor, combustor means, means to transfer the output of said air compressor to said combustor, means to convey medium BTU coal gas from said means to convert to said combustor, gas turbine means and means to transfer the output of said combustor to said gas turbine means.
7. The oxygen blown coal gasificationstationary gas turbine power plant of claim 6 further comprising an oxygen-deficient air mixture compressor connected to said means to recover by-product oxygen-deficient air mixture, and means to transfer compressed oxygen-deficient air mixture from said oxygen-deficient air mixture compressor to said combustor means.
8. The oxygen blown coal gasificationstationary gas turbine power plant of claim 7 wherein said means to transfer compressed oxygen-deficient air mixture comprises means to convey compressed oxygen-deficient air mixture from said oxygen-deficient air mixture compressor to said means to convey medium BTU coal gas from said means to convert.
9. A gas turbine power plant having reduced NOx emission comprising, a gas turbine, combustor means for said gas turbine for combusting the fuel which operates said gas turbine; a medium BTU fuel gas source connected to said combustor; a source of compressed air connected to said combustor wherein the air of said source of air contains about 21% by volume of oxygen; and a source of compressed oxygendeficient air connected to said combustor and replacing a corresponding volume of said oxygen containing air which is treated by said combustor.
10. A method according to claim 1 and substantially as described herein with reference to Figs. 1 to 3 of the accompanying drawings.
11. An oxygen blown coal gasification and stationary gas turbine power plant substantially as described herein with reference to Figs. 1 to 3 of the accompanying drawings.
GB8039427A 1980-01-21 1980-12-09 Control of NOx emissions in a stationary gas turbine Withdrawn GB2067668A (en)

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US11363780A 1980-01-21 1980-01-21

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DE (1) DE3100751A1 (en)
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US4631915A (en) * 1984-04-21 1986-12-30 Kraftwerk Union Aktiengesellschaft Gas turbine and steam power-generating plant with integrated coal gasification plant
EP0137152A3 (en) * 1983-08-30 1987-02-04 Brown, Boveri & Cie Aktiengesellschaft Method of operating a gas turbine plant combined with a fuel gasification plant
US4651519A (en) * 1983-05-31 1987-03-24 Kraftwerk Union Aktiengesellschaft Combined gas-turbine plant preceded by a coal gasification plant
EP0269609A1 (en) * 1986-11-25 1988-06-01 Deutsche Voest-Alpine Industrieanlagenbau Gmbh A process and an arrangement for gaining electric energy in addition to producing molten pig iron
EP0622535A1 (en) * 1993-04-27 1994-11-02 Air Products And Chemicals, Inc. Use of nitrogen from an air separation unit as gas turbine air compressor feed refrigerant to improve power output
EP0626510A1 (en) * 1993-05-28 1994-11-30 Praxair Technology, Inc. Gas turbine-air separation plant combination
US5386686A (en) * 1992-04-29 1995-02-07 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for the operation of a gas turbine group and the production of at least one air gas
US5402631A (en) * 1991-05-10 1995-04-04 Praxair Technology, Inc. Integration of combustor-turbine units and integral-gear pressure processors
US5406786A (en) * 1993-07-16 1995-04-18 Air Products And Chemicals, Inc. Integrated air separation - gas turbine electrical generation process
WO1997010416A1 (en) * 1995-09-16 1997-03-20 Krupp Uhde Gmbh Power-generation method using combined gas and steam turbines
EP0773416A2 (en) 1995-11-07 1997-05-14 Air Products And Chemicals, Inc. Operation of integrated gasification combined cycle power generation systems at part load
EP0793070A2 (en) 1996-01-31 1997-09-03 Air Products And Chemicals, Inc. High pressure combustion turbine and air separation system integration
EP0774634A3 (en) * 1995-11-17 1998-04-29 The BOC Group plc Gas manufacture
US5901547A (en) * 1996-06-03 1999-05-11 Air Products And Chemicals, Inc. Operation method for integrated gasification combined cycle power generation system
US6217681B1 (en) 1998-04-14 2001-04-17 Air Products And Chemicals, Inc. Method for oxygen-enhanced combustion using a vent stream
WO2007047270A1 (en) * 2005-10-12 2007-04-26 Praxair Technology, Inc. Igcc wobbe index maintenance method

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DE3319732A1 (en) * 1983-05-31 1984-12-06 Kraftwerk Union AG, 4330 Mülheim MEDIUM-POWER PLANT WITH INTEGRATED COAL GASIFICATION SYSTEM FOR GENERATING ELECTRICITY AND METHANOL
DE3320228A1 (en) * 1983-06-03 1984-12-06 Kraftwerk Union AG, 4330 Mülheim POWER PLANT WITH AN INTEGRATED COAL GASIFICATION PLANT
DE3320227A1 (en) * 1983-06-03 1984-12-06 Kraftwerk Union AG, 4330 Mülheim POWER PLANT WITH AN INTEGRATED COAL GASIFICATION PLANT
DE3408937A1 (en) * 1984-01-31 1985-08-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau COMBINED GAS / VAPOR POWER PLANT
DE3416181A1 (en) * 1984-02-28 1985-09-12 Ruhrkohle Ag, 4300 Essen Energy generating system
DE3416182A1 (en) * 1984-02-28 1985-09-12 Ruhrkohle Ag, 4300 Essen Energy generating system
DE3545524C2 (en) * 1985-12-20 1996-02-29 Siemens Ag Multi-stage combustion chamber for the combustion of nitrogenous gas with reduced NO¶x¶ emission and method for its operation
US5865878A (en) * 1997-04-29 1999-02-02 Praxair Technology, Inc. Method for producing oxidized product and generating power using a solid electrolyte membrane integrated with a gas turbine
RU2280183C1 (en) * 2005-01-11 2006-07-20 Михаил Иванович Весенгириев Gas-turbine engine
RU2280184C1 (en) * 2005-01-11 2006-07-20 Михаил Иванович Весенгириев Gas-turbine engine
RU2280182C1 (en) * 2005-01-11 2006-07-20 Михаил Иванович Весенгириев Gas turbine engine
RU2292471C1 (en) * 2005-12-01 2007-01-27 Владимир Григорьевич Павлюков Method of and system for fuel delivery into gas-turbine engine (versions)
RU2305199C1 (en) * 2006-02-20 2007-08-27 Михаил Иванович Весенгириев Gas-turbine engine
RU2305198C1 (en) * 2006-02-20 2007-08-27 Михаил Иванович Весенгириев Gas-turbine engine
RU2305197C1 (en) * 2006-02-20 2007-08-27 Михаил Иванович Весенгириев Gas-turbine engine
US20090223201A1 (en) * 2008-03-10 2009-09-10 Anand Ashok K Methods of Injecting Diluent Into A Gas Turbine Assembly
RU2463463C2 (en) * 2010-12-24 2012-10-10 Валерий Игнатьевич Гуров Combined power system
DE102014211266A1 (en) * 2014-06-12 2015-12-17 Siemens Aktiengesellschaft Supply of nitrogen from an air separation plant in a stationary gas turbine

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