Gas turbine power plant with exhaust gas recirculation
An exhaust gas recirculation, gas turbine technology, used in gas turbine installations, combustion air/combustion-air handling, turbine/propulsion air inlets, etc., which can solve problems such as high cost and damage to power and efficiency of power plants
Active Publication Date: 2014-12-10
ANSALDO ENERGIA IP UK LTD
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Problems solved by technology
Both solutions are large and costly and require additional space in the power station
Specifically, the use of blowers further impairs the power and efficiency of power stations
Method used
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Embodiment Construction
[0057] figure 1 A schematic diagram showing the basic elements of a gas turbine power plant with exhaust gas recirculation. The gas turbine 6 includes a compressor 1 , in which compressed combustion air is fed to a combustion chamber 4 and combusted there together with a fuel 5 . The hot combustion gases are subsequently expanded in turbine 7 . The useful energy generated in the turbine 7 is then converted into electrical energy, for example by means of a first generator 25 arranged on the same shaft.
[0058] In order to make optimum use of the energy still contained in the hot exhaust gas, the hot exhaust gas 8 flowing from the turbine 7 is used in a heat recovery steam generator (HRSG) 9 to generate live steam 30 for a steam turbine 13 or other devices. The useful energy generated in the steam turbine 13 is then converted into electrical energy, for example by means of a second generator 26 arranged on the same shaft. The steam circuit is shown in simplified form and on...
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What is described is a method for operating a gas turbine power plant, in which fresh air is delivered to a compressor inlet and is accelerated in the compressor inlet and a recirculated first exhaust gas substream is delivered into a region of the compressor inlet in which the fresh air is accelerated to an extent such that the difference between total pressure and static pressure in the fresh air is greater than or equal to a pressure difference which is required in order to suck a target mass flow of the recirculated first exhaust gas substream into the compressor inlet. What is described, further, is a gas turbine power plant with a gas turbine, the compressor inlet of which is divided into two sectors which the flow duct of the compressor adjoins, a feeder for fresh air being connected to the first sector and a recirculation line for recirculating the first exhaust gas substream being connected to the second sector, and the second sector reaching so close to the compressor that, when the gas turbine is in operation, the static pressure at the outlet of the second sector is so low that the difference between total pressure and static pressure is greater than or equal to a pressure difference which is required in order to suck a target mass flow of the recirculated first exhaust gas substream into the compressor inlet.
Description
technical field [0001] The present disclosure relates to methods for operating a gas turbine with two intake streams of different gas compositions, and to a gas turbine with a separate compressor inlet. Background technique [0002] Recirculation is a technique that can basically be used to achieve most different feasible purposes in gas turbines. Thus, for example, to control emissions, reduce exhaust volume for carbon dioxide separation, etc. In exhaust gas recirculation in a gas turbine, a large amount of exhaust gas is diverted from the total exhaust gas substream and re-delivered, usually after cooling and cleaning, to the mass intake stream of the turbine or to the turbo compressor. The exhaust composition differs significantly from that of fresh ambient air. Traditionally, the recirculated exhaust substream is mixed with fresh air from the environment and this mixture is subsequently sent to the compressor. [0003] Advantageously, by exhaust gas recirculation, the...
Claims
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IPC IPC(8): F02C7/04F01K13/02F01K23/10F02C3/34
CPCF02C7/04F02C3/34F05D2270/20F01K23/10F05D2220/60F01K23/101F02C6/18F01K13/02F02C1/005F02C1/08F02C7/042F02C7/057
Inventor E.本茨J.黑拉特H.韦特施泰因R.派内
Owner ANSALDO ENERGIA IP UK LTD