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Gas turbine power plant with flue gas recirculation and catalytic converter

A technology for power equipment and gas turbines, which is applied in the direction of gas turbine devices, mechanical equipment, combustion engines, etc., and can solve the problems that completely stable combustion is difficult to achieve and difficult to achieve.

Active Publication Date: 2017-07-21
ANSALDO ENERGIA IP UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fully stable combustion near stoichiometric conditions in the confined space of gas turbine combustors is difficult to achieve
Furthermore, matching of two compressors on a single shaft (e.g., with respect to mass flow and pressure) is difficult to achieve for different operating conditions

Method used

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  • Gas turbine power plant with flue gas recirculation and catalytic converter
  • Gas turbine power plant with flue gas recirculation and catalytic converter
  • Gas turbine power plant with flue gas recirculation and catalytic converter

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Embodiment Construction

[0030] In the following, the same or the same function is provided with the same name. The indicated values ​​and size specifications are merely exemplary values ​​and are not equivalent to any limitation of the present invention to such sizes.

[0031] according to figure 1 with figure 2 , Demonstration of a gas turbine power plant 1, which can be used in, for example, a power plant arrangement for power generation, which includes at least one gas turbine 2, at least one heat recovery boiler arrangement 3, and at least one flue gas recirculation section 4. The respective gas turbine 2 includes at least one compressor 5, at least one combustor 6, 7, and at least one turbine 8,9. In the embodiment shown here, the gas turbine 2 includes two turbines 8 and 9 called a high-pressure turbine 8 and a low-pressure turbine 9. Thus, two combustors 6 and 7 are also provided, called: a high-pressure combustor 6, which is upstream of the high-pressure turbine 8; and a low-pressure combustor...

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Abstract

The invention pertains a power plant (1) comprising a gas turbine (2), a heat recovery boiler arrangement (3) with at least a boiler inlet (10), and an outlet side with a first exit (13) connected to a stack (15) and a second exit (14) connected to a flue gas recirculation (4), which connects the second exit (14) to the compressor inlet (18) of the gas turbine (2). The heat recovery boiler arrangement (3) comprises a first boiler flue gas path (20) from the boiler inlet (10) to the first boiler exit (13), and a separate second boiler flue gas path (21) from the boiler inlet (10) to the second boiler exit (14). Additionally, a supplementary firing (49) and a subsequent catalytic NOx converter (50) are arranged in the first boiler flue gas path (20). Besides the power plant (1) a method to operate such a power plant (1) is an object of the invention.

Description

Technical field [0001] The invention relates to a combined cycle power plant with a catalytic converter and a method for operating such a power plant. Background technique [0002] Selective catalytic reduction (SCR) with ammonia is a common method for NOx reduction in gas turbine power plants. It converts nitrogen oxides (also called NOx) into N2 and water, H2O with the help of a catalyst. The use of a three-way catalytic converter has been proposed to avoid the use of ammonia. However, they require a fuel-to-air ratio close to the stoichiometric point. In order to reduce the oxygen content in the combustion gas, a gas turbine equipment is proposed in U.S. 2009 / 0284013A1, which includes a gas turbine, a heat recovery steam generator, and a flue gas recirculation section. The gas turbine includes a compressor for air, and a compressor, combustor, and turbine for recirculating flue gas. Connect the input side of the heat recovery steam generator to the turbine outlet of the ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02C3/34F02C6/18F01K23/10
CPCF01K23/103F02C3/34F02C6/18F05D2270/082Y02E20/14Y02E20/16Y02T10/12B01D53/8628F01N3/2006F01N3/28F01N2250/12F01N2570/14
Inventor E.本兹K.多伊贝林M.霍伊维
Owner ANSALDO ENERGIA IP UK LTD